CN115268079A - Light-emitting components, display modules and near-eye display devices - Google Patents

Abstract

The application relates to a light-emitting component, a display module and near-to-eye display equipment. The light emitting assembly includes a substrate, a light emitting unit, and a lens unit. The light emitting unit is arranged on the substrate. The lens unit is arranged on the light emitting side of the light emitting unit, and the optical axis of the lens unit is perpendicular to the central axis of the light emitting unit and deviates from the central axis of the light emitting unit. When above-mentioned light-emitting component is applied to near-eye display device's display module assembly, can realize subducing the effect of ghost image, be favorable to promoting near-eye display device's imaging quality, promote user's use and experience.

Description

Light-emitting components, display modules and near-eye display devices

technical field

The present application relates to the technical field of near-eye display, in particular to a light-emitting component, a display module and a near-eye display device.

Background technique

Near-eye display devices include augmented reality (Augmented Reality, AR) devices, mixed reality (Mixed Reality, MR) devices, etc. Near-eye display devices can integrate the virtual image formed by the display module with the real scene to bring users an immersive visual experience. experience. As a result, near-eye display devices are increasingly sought after by the industry, and the performance requirements of the industry for near-eye display devices are also getting higher and higher. However, current near-eye display devices are prone to ghost images, which seriously affects user experience.

Contents of the invention

Embodiments of the present application provide a light-emitting component, a display module, and a near-eye display device to solve the problem that current near-eye display devices are prone to ghost images.

A lighting assembly, comprising:

base;

a light emitting unit disposed on the substrate; and,

The lens unit is arranged on the light emitting side of the light emitting unit, and the optical axis of the lens unit deviates from the central axis of the light emitting unit in a direction perpendicular to the central axis of the light emitting unit.

A display module has a central field of view and a peripheral field of view, and the display module includes:

substrate; and,

A plurality of light-emitting components, the plurality of light-emitting components are arranged on the substrate in an array, wherein the chief light emitted by the light-emitting components located in the peripheral field of view is inclined to the central axis of the light-emitting surface of the light-emitting components.

A near-eye display device, comprising a projection lens group, a light guide module, and a display module as described in any one of the above embodiments, the projection lens group is arranged between the light guide module and the display module .

In the above-mentioned light-emitting assembly, by making the optical axis of the lens unit deviate from the central axis of the light-emitting unit in a direction perpendicular to the central axis of the light-emitting unit, the chief light emitted by the light-emitting assembly is inclined to the central axis of the light-emitting unit. Therefore, when the light-emitting component is applied to the display module of the near-eye display device, the light emitted by the light-emitting component is projected to the light guide module through the projection lens group of the near-eye display device, and is reflected back to the display module through the light guide module. When reflected by the display module and projected to the projection lens group, at least part of the reflected light will deviate from the light-receiving cone angle of the projection lens group and cannot enter the light guide module to generate ghost images, thereby achieving the effect of reducing ghost images, which is conducive to improving The imaging quality of the near-eye display device improves the user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of a near-eye display device worn on a user's head in some embodiments;

Fig. 2 is a schematic structural diagram of a near-eye display device in some embodiments;

Fig. 3 is a schematic diagram of the outgoing light path of the light-emitting component located in the peripheral field of view in some embodiments;

Fig. 4 is a schematic diagram of the outgoing light path of the light-emitting component located in the central field of view in some embodiments;

Fig. 5 is a schematic diagram of the relationship between the chief ray emitted by the light-emitting component and the viewing angle in some embodiments;

Fig. 6 is a schematic diagram of the outgoing light path of the light-emitting component located in the quasi-central field of view in some embodiments;

Fig. 7 is a schematic diagram of the relationship between the chief ray emitted by the light-emitting component and the angle of view in other embodiments;

Fig. 8 is a schematic diagram of light emitting paths of light emitting components located in different fields of view in other embodiments;

Fig. 9 is a schematic structural diagram of a light-emitting component located in a peripheral field of view in some embodiments;

Fig. 10 is a schematic diagram of the relationship between the offset of the lens unit relative to the light-emitting unit and the angle of view in some embodiments;

Fig. 11 is a schematic structural diagram of a light-emitting component located in the central field of view in some embodiments;

Fig. 12 is a schematic diagram of the relationship between the offset of the lens unit relative to the light-emitting unit and the field of view angle in some other embodiments;

FIG. 13 is a schematic structural diagram of a display module and a projection lens set in some embodiments.

Reference signs:

10. Near-eye display device; 11. Display module; 111. Substrate; 112. Light-emitting component; 1121. Light-emitting unit; 1122. Light-emitting surface; 1123. Lens unit; ; 115, red light module; 116, green light module; 117, blue light module; 12, projection lens group; 13, light guide module; 131, optical waveguide; 132, input coupling grating; user.

Detailed ways

In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

The optical system of near-eye display devices such as AR equipment and MR equipment is usually equipped with a display module for emitting light, a projection lens group for projecting light, and a light guide module for transmitting light. In the light guide module projected by the light emitted by the group, the light guide module is used to fuse the light emitted by the display module with the light of the real scene, and transmit it to the user's eyeballs, bringing an immersive visual experience to the user. Wherein, the display module is provided with a plurality of light-emitting components arranged in an array, each light-emitting component can emit light, and the projection lens group can receive and project at least part of the light emitted by the light-emitting component to the light guide module, and the projection lens group can The angle at which the light emitted by the light-emitting component is received is the light-receiving cone angle of the projection lens group, and the light emitted by the light-emitting component within the light-receiving cone angle can be projected into the light guide module by the projection lens group. In the near-eye display device in the related art, part of the light emitted by the display module and projected to the light guide module through the projection mirror group is reflected by the light guide module to form reflected light, and part of the reflected light will return to the display module through the projection mirror group. group, and then return to the light guide module through the projection lens group after being reflected by the display module.

The projection lens group is usually composed of one or more lenses. Due to the conjugate characteristic of lens imaging, the position of the reflected light returning to the display module through the projection lens group is usually different from the position of the light-emitting component that emits the light, and the reflected light passes through the After reflection, the display module is usually within the light-receiving cone angle of the projection lens group, causing the reflected light to return to the light guide module through the projection lens group again to form an image different from that displayed by the display module. For example, the reflection position of part of the reflected light in the display module and the position where the light is emitted by the display module are symmetrically distributed in the center, so that when the part of the reflected light is transmitted to the user's eyeball through the projection lens group and the light guide module, it is easy to form a The image displayed by the display module is upside-down, left-right, and ghost image, which affects the user's viewing experience.

In order to solve the above problems, the present application provides a light emitting component, a display module and a near-eye display device.

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a schematic diagram of a near-eye display device 10 worn on the head of a user 20 in some embodiments, and FIG. 2 is a schematic structural diagram of a near-eye display device 10 in some embodiments. The near-eye display device 10 provided in this application includes, but is not limited to, AR head-mounted devices such as AR glasses and AR helmets, or MR head-mounted devices such as MR glasses and MR helmets. The near-eye display device 10 may include a display module 11, a projection lens group 12, and a light guide module 13. The display module 11 is used to emit light. The display module 11 may include various types of display screens capable of emitting light to display images, such as Including LED miniaturization and matrix technology display (Micro LED display), self-luminous single-panel color Micro-LED micro display, etc. The projection lens group 12 can be a collimating lens group, and the projection lens group 12 can include one or more lenses with optical power. The projection lens group 12 is used to adjust the light emitted by the display module 11 and project it to the light guide module. 13 in. For example, the projection lens group 12 can collimate the light emitted by the display module 11 to form parallel light and project it into the light guide module 13, then the cooperation between the display module 11 and the projection lens group 12 can form a Lambertian light source, which is beneficial to improve The imaging quality of the near-eye display device 10 . The light guide module 13 is used to fuse the light emitted by the display module 11 with the light of the real scene, and conduct it to the eyeball of the user 20 for the user 20 to watch.

The light guide module 13 may include an optical waveguide 131 , an input coupling grating 132 and an output coupling grating 133 , and the input coupling grating 132 and the output coupling grating 133 are both disposed on the optical waveguide 131 . Wherein, the input coupling grating 132 is correspondingly arranged at the position where the light emitted by the display module 11 enters the optical waveguide 131 , and the output coupling grating 133 is correspondingly arranged at the position where the light in the optical waveguide 131 is emitted to the eyeball of the user 20 . The input coupling grating 132 can input the light of the real scene and the light emitted by the display module 11 into the optical waveguide 131 through processes such as diffraction and refraction, and the optical waveguide 131 transmits the light input from the input coupling grating 132 to the In the output coupling grating 133 , the light is projected to the eyeball of the user 20 through processes such as diffraction and refraction of the output coupling grating 133 .

In the embodiment shown in FIG. 2, the light guide module 13 only includes one set of optical waveguides 131, input coupling gratings 132, and output coupling gratings 133. In fact, the light guide module 13 may also include two, three or More optical waveguides 131 , input coupling gratings 132 and output coupling gratings 133 are used to couple light of different wavelength bands into different optical waveguides 131 for transmission, so as to improve the imaging quality of the near-eye display device 10 .

Of course, the near-eye display device 10 may also include functional modules such as an audio module, a wireless communication module, and a data processing module not shown in the figure. Complete AR or MR imaging. The specific configuration of the modules in the near-eye display device 10 can be selected according to actual needs, and will not be repeated here.

Further, referring to FIG. 2 and FIG. 3 , in some embodiments, the display module 11 includes a substrate 111 and a plurality of light emitting components 112 disposed on the substrate 111 in an array. The number of light-emitting components 112 can correspond to the number of pixels of the display module 11 , and the arrangement of the light-emitting components 112 can be set according to the pixel display requirements of the display module 11 . It can be understood that the display module 11 includes a central field of view and a peripheral field of view, and the maximum viewing angle of the display module 11 corresponds to the range of the peripheral viewing field. When the central viewing field points to the direction of the peripheral viewing field, the viewing angle gradually increases. big. In some embodiments, the chief ray b emitted by the light emitting component 112 located in the peripheral field of view is inclined to the central axis c of the light emitting surface 1122 of the light emitting component 112 .

It should be noted that, in this application, an aperture (not shown) is provided in the optical path of the near-eye display device 10, and the chief light emitted by a certain light-emitting component 112 can be understood as the light emitted by the light-emitting component 112 passing through the aperture. Center of light. The light-emitting component 112 can include a light-emitting unit 1121, which can be a Micro LED chip, and when the light emitted by the light-emitting component 112 comes from the light-emitting unit 1121 in the light-emitting component 112, the light-emitting surface 1122 of the light-emitting unit 1121 is a light-emitting The light-emitting surface 1122 of the component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 can be understood as the central axis of the light-emitting unit 1121 in the light-emitting component 112 . The central axis of a light-emitting unit 1121 is defined in this application as a straight line passing through the geometric center of the surface of the light-emitting unit 1121 facing the projection lens group 12 and perpendicular to the surface of the light-emitting unit 1121 facing the projection lens group 12 .

It can be understood that, due to the conjugate characteristic of the imaging of the projection lens group 12, in a traditional near-eye display device, when the chief ray emitted by a certain light-emitting component coincides with the central axis of the light-emitting surface 1122 of the light-emitting component, the light emitted by the light-emitting component The light within the range of the light-receiving cone angle of the projection mirror group is reflected by the light guide module and returns to the display module, and then reflected by the display module toward the projection mirror group to form reflected light. The reflected light is usually still located in the projection mirror group In the light collection cone angle, it is easy to be projected by the projection lens group into the light guide module to form a ghost image.

Referring to FIG. 3 , in the near-eye display device 10 of the present application, the chief ray b emitted by the light-emitting component 112 located in the peripheral field of view is inclined to the central axis c of the light-emitting surface 1120 of the light-emitting component 112, and the light emitted by the light-emitting component 112 is located at The light rays e within the light collection cone angle d of the projection lens group 12 can be received by the projection lens group 12 and projected into the light guide module 13 . Part of the light e is reflected by the input coupling grating 132 , the optical waveguide 131 or other elements of the light guide module 13 to form the light f that returns to the display module 11 through the projection lens group 12 . At this time, the setting of the chief ray b inclined to the central axis c will affect the angle at which the ray f is incident on the display module 11, thereby changing the reflection angle of the ray f on the display module 11, causing the ray f to be reflected by the display module 11 to form At least part of the light g deviates from the range of the light collection cone angle d of the projection lens group 12, so that at least part of the light g cannot be received by the projection lens group 12 and projected into the light guide module 13 to form a ghost image. Thus, the above-mentioned display module 11 of the present application can reduce at least part of the light reflected by the light guide module 13 and return to the display module 11 to form a ghost image when it returns to the light guide module 13 again, thereby realizing ghost reduction. The image effect is conducive to improving the imaging quality of the near-eye display device 10, thereby improving the user experience of the user 20.

It can be understood that as long as there is an angle between the chief light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112, the light emitted by the light emitting component 112 can be reflected back to the light source by the light guide module 13. The display module 11, when reflected by the display module 11, at least part of the reflected light deviates from the light-receiving cone angle of the projection mirror group 12 and cannot enter the light guide module 13, thereby reducing at least part of the reflected light back to the light guide module 13 A ghost image is formed, so as to reduce at least part of the ghost image, and achieve the effect of improving the imaging quality of the near-eye display device 10 . Therefore, the included angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is not limited, and can be specifically set according to requirements for eliminating ghost images.

Of course, the larger the angle between the chief light emitted by the light emitting component 112 in the peripheral field of view and the central axis of the light emitting surface 1122 of the light emitting component 112, the more obvious the effect of eliminating ghost images. In some embodiments, the included angle between the chief light emitted by the light-emitting component 112 located in the peripheral field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is greater than or equal to 5°, which can eliminate at least part of the reflected light back to A ghost image is formed in the light guide module 13, thereby reducing part of the ghost image.

Furthermore, as shown in FIG. 3 , in some embodiments, the angle between the chief ray emitted by the light-emitting component 112 located in the peripheral field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is larger than the corresponding angle of the light-emitting component 112 . half of the light-receiving cone angle of the projection lens group 12, thereby reducing ghost images to the greatest extent. In some embodiments, the light-receiving cone angle d of the projection lens group 12 corresponding to the light-emitting component 112 in the fringe field of view is 20°, for example, the light-receiving cone angle d of the projection lens group 12 corresponding to the light-emitting component 112 is 20°. Then the angle between the chief ray b emitted by the light-emitting component 112 and the central axis c of the light-emitting surface 1122 of the light-emitting component 112 is greater than or equal to half of the light-receiving cone angle d, that is, greater than or equal to 10°. In this way, when the light e emitted by the light-emitting component 112 returns to the display module 11 through the light guide module 13 to reflect the light g formed again by the display module 11, the reflection direction of the light g completely deviates from the light collection cone of the projection mirror group 12 corresponding to the reflection position. Angle d, so that the light g cannot be received by the projection lens group 12 and projected to the light guide module 13 to the greatest extent, thereby preventing the light g from returning to the light guide module 13 to form a ghost image to the greatest extent.

Certainly, the included angle between the chief light emitted by the light-emitting component 112 located in the peripheral field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 cannot be too large, so as to prevent the light emitted by the light-emitting component 112 from entering the projection lens group 12 The angle is too large to be reflected by the projection lens group 12, and cannot be projected by the projection lens group 12 to the light guide module 13, which reduces the light extraction efficiency of the display module 11. In some embodiments, when the light-receiving cone angle of the projection lens group 12 corresponding to the light-emitting component 112 is 20°, the distance between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 The angle is less than or equal to 30°, so as to avoid excessive deviation of the chief ray and affect the light utilization efficiency of the near-eye display device 10 .

It should be noted that, compared with the light emitting components 112 located in the peripheral field of view, the light emitted by the light emitting components 112 located in the central field of view is less likely to affect the imaging quality of the near-eye display device 10 . Specifically, referring to FIG. 3 and FIG. 4 , in the embodiment shown in FIG. 4 , the chief ray emitted by the light-emitting component 112 located in the central field of view coincides with the central axis of the light-emitting surface 1122 of the light-emitting component 112 , because the The chief ray emitted by the light-emitting component 112 passes through the optical axis of the projection lens group 12, and the light h emitted by the light-emitting component 112 is reflected by the light guide module 13 back to the display module 11, and then the light i formed by the reflection of the display module 11 is approximately Coincident with light h, it is not easy to form a ghost image different from the image displayed by light h. At the same time, since the light i has been reflected multiple times by the light guide module 13 and the display module 11, the intensity of the light i is much smaller than the intensity of the light h, even if a ghost image is formed, it can be covered by the image of the light h, and it is not easy to affect the near-eye The imaging quality of the display device 10 .

Therefore, in some embodiments, the chief light emitted by the light-emitting component 112 in the peripheral field of view is inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112, so as to reduce the return of at least part of the light emitted by the light-emitting component 112 in the peripheral field of view. When the ghost image is formed in the display module 11 , the chief ray emitted from the light-emitting component 112 located in the central field of view may be parallel to or overlap with the central axis of the light-emitting surface 1122 of the light-emitting component 112 . Such setting is not only beneficial to reduce the ghost image of the near-eye display device 10 , but also does not need to adjust the chief light emitted by the light-emitting component 112 of the full field of view, which is beneficial to simplify the design and manufacturing process of the display module 11 .

Based on the difference in reflected light imaging between the peripheral field of view and the central field of view, as shown in FIG. 3 , FIG. 4 and FIG. As the geometric center of the surface of the projection lens group 12 points to the edge, the angle between the chief ray emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 increases gradually. For example, in the embodiment shown in FIG. 5 , the principal ray emitted by the light-emitting component 112 located in the central field of view is parallel to the central axis of the light-emitting surface 1122 of the light-emitting component 112 , while the principal ray emitted by the light-emitting component 112 located in the peripheral field of view is The angle between the light and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is greater than half of the light-receiving cone angle of the corresponding projection lens group 12 . The abscissa in FIG. 5 is the viewing angle of the display module 11 corresponding to the position of the light emitting component 112 , and the ordinate is the angle between the chief ray emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 . It can be seen from FIG. 5 that in this embodiment, as the viewing angle of the corresponding position increases, the angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 also increases. Gradually increase.

It can be understood that, in the embodiment shown in FIG. 5 , since the angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 increases with the increase of the viewing angle , then it is located between the central field of view and the peripheral field of view, for example, the angle between the chief ray emitted by the light-emitting component 112 located in the quasi-central field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 may not be larger than the quasi-center The field of view corresponds to half of the light collection cone angle of the projection lens group 12 , so part of the light emitted by the light emitting component 112 located in the quasi-central field of view may still form a ghost image.

Specifically as shown in FIG. 6 , the chief ray emitted by the light-emitting assembly 112 located in the quasi-central field of view is inclined to the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 , but the chief ray emitted by the light-emitting assembly 112 located in the quasi-central field of view is in line with the central axis of the light-emitting surface 1122 of the light-emitting assembly 112. The included angle between the central axes of the light-emitting surfaces 1122 of the light-emitting assembly 112 is smaller than the light-receiving cone angle of the projection lens group 12 corresponding to the quasi-central field of view. The light j emitted by the light-emitting component 112 located in the quasi-center field of view is reflected by the light guide module 13 and then reflected by the display module 11 to form light k, at least part of the light k deviates from the light-receiving cone angle of the corresponding projection lens group 12 It is impossible to return to the light guide module 13 to form a ghost image, and part of the light k may be located in the light collection cone angle of the corresponding projection lens group 12, and this part of light k may be received by the projection lens group 12 and projected to the light guide module. 13 to form a ghost image.

Therefore, in this embodiment, the near-eye display device 10 can reduce the ghost images formed by the light-emitting components 112 located in the peripheral field of view to the greatest extent, and reduce the ghost images formed by part of the light-emitting components 112 located in the quasi-center field of view. The light-emitting component 112 in the field of view is not easy to form a ghost image, and even if a ghost image is formed, the impact on the imaging quality of the near-eye display device 10 is small, so that the imaging quality of the near-eye display device 10 can be improved, and the effect of improving the user experience of the user 20 can be achieved. At the same time, the included angle between the chief light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 increases with the increase of the viewing angle, which is beneficial to the design and manufacture of the display module 11 .

In some embodiments, the angle between the chief light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 is proportional to the viewing angle, which can reduce the difficulty of designing and molding the display module 11 . Further, referring to FIG. 5 , in some embodiments, the angle between the chief ray emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 is equal to the corresponding field angle of the light emitting component 112 . It can not only effectively reduce the ghost image, but also facilitate the design and manufacture of the display module 11 . It can be seen from FIG. 5 that half of the light-receiving cone angle of the projection lens group 12 in this embodiment is 10°, and the near-eye display device 10 can minimize the light-emitting components 112 whose corresponding viewing angles are greater than or equal to 10°. Risk of ghost images from emitted light.

It should be noted that only two of the light-emitting assemblies 112 located in the peripheral field of view are shown in FIG. The light-emitting components 112 located in the edge area of the substrate 111 can all be located in the edge field of view, and the position corresponding to the substrate 111 and the central field of view can also be provided with a plurality of light-emitting components 112. The number and arrangement of the light-emitting components 112 can be determined according to the display module 11 pixel and field of view and other requirements for design.

It should be noted that FIG. 5 only shows the relationship between the angle between the chief ray and the central axis and the corresponding viewing angle in one embodiment, but the setting of the display module 11 is not limited to this, as long as it can It is sufficient to reduce at least part of the ghost image. For example, in some embodiments, in the direction from the center field of view to the edge field of view, the included angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 increases gradually, but does not The field of view is proportional to the relationship. In some other embodiments, the included angles between the chief light emitted by the light-emitting component 112 with a corresponding viewing angle greater than or equal to 10° and the central axis of the light-emitting surface 1122 of the light-emitting component 112 may be equal, and all of them are equal to or equal to 10°, the ghost images generated by the light-emitting components 112 whose corresponding viewing angles are greater than or equal to 10° can also be minimized to the greatest extent.

Please refer to FIG. 3 again. It can be understood that when the light g reflected by the display module 11 deviates from the light collection cone angle of the corresponding projection lens group 12, the light g cannot be received by the projection lens group 12 and directed to the light guide module 13 The light g may be absorbed by the frame (not shown in the figure) of the display module 11 , the substrate 111 , or components with weaker reflection effects in the light-emitting component 112 after one or more reflections. Of course, part of the light g may also enter the projection lens group 12 after one or more reflections and be projected into the light guide module 13. characteristics, the light g entering the light guide module 13 will form background stray light instead of ghost images, which can also reduce the impact of ghost images on imaging quality.

It can be seen from the above description that, in the embodiment shown in FIG. 5 , the light emitted by the light-emitting component 112 whose viewing angle is smaller than 10° may still produce ghost images, which affects the imaging quality of the near-eye display device 10 . In some other embodiments, the chief rays emitted by the light-emitting component 112 within the full field of view including the peripheral field of view, the quasi-central field of view, and the central field of view are all inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112 . Referring to FIG. 7, the abscissa in FIG. 7 is the viewing angle of the display module 11, and the ordinate is the angle between the chief ray emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112, The dotted line in FIG. 7 represents the light-receiving cone angle of the projection lens group 12 , and the solid line represents the angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 .

It can be seen from FIG. 7 that, in some embodiments, the included angle between the chief ray emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is larger than the light-receiving light of the projection lens group 12. Cone angle, so that the light emitted by the light-emitting component 112 in the full field of view can be reflected back to the display module 11 through the light guide module 13, and then the reflected light generated by the display module 11 will deviate from the projection lens group 12. The light-receiving cone angle can be reduced to the greatest extent to reduce the ghost image generated by the light in the full field of view, and improve the imaging quality of the near-eye display device 10 .

Referring to FIG. 7 , in some embodiments, the angles between the chief light emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are equal, which is beneficial to the light-emitting component 112 batch design and manufacture, thereby greatly reducing the difficulty of design and manufacture of the display module 11. In the embodiment shown in FIG. 7 , the included angle between the chief ray emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is 15°. Of course, the included angle Other settings are also possible, as long as they can be greater than or equal to the light collection cone angle of the corresponding projection lens group 12 . Specifically, in some embodiments, the included angles between the chief ray emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are all between 10° and 30°, that is, The ghost image can be reduced to the greatest extent, and the excessive deviation of the chief ray can also be avoided to affect the light utilization rate of the near-eye display device 10 . Of course, the included angles between the chief rays emitted by the light-emitting components 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting components 112 may not be equal, as long as they are larger than the light-receiving cone angles of the corresponding projection lens groups 12 , to minimize ghost images in the entire field of view.

As shown in Figure 7 and Figure 8, the light L shown in Figure 8 is the light emitted by the light-emitting component 112 located in the central field of view, and the light m is formed by the light L being reflected by the light guide module 13 and then reflected by the display module 11 The light n is the light emitted by the light-emitting component 112 located in the peripheral field of view, the light o is the reflected light formed by the reflection of the light guide module 13 and then reflected by the display module 11, the light m and the light o are both It is not within the range of the light-receiving cone angle of the projection lens group 12 . In the embodiment shown in FIG. 7 and FIG. 8 , the included angles between the chief ray emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are greater than or equal to the corresponding projection The light-receiving cone angle of the mirror group 12 means that the light emitted by the light-emitting component 112 in the full field of view is reflected by the light guide module 13 and the display module 11 and the reflected light deviates from the light-receiving angle of the corresponding projection mirror group 12. cone angle to minimize ghosting across the field of view.

Of course, there is no limit to the specific arrangement of making the chief light emitted by the light emitting assembly 112 inclined to the central axis of the light emitting unit 1121 , as long as the effect of reducing at least part of ghost images is achieved. Referring to FIG. 3 and FIG. 9 , in some embodiments, by deviating the optical axis p of the lens unit 1123 in the light emitting assembly 112 from the central axis q of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 , so that the chief ray r emitted by the light emitting component 112 is inclined to the central axis q of the light emitting unit 1121 . Specifically, in some embodiments, the light-emitting component 112 further includes a base 1124 and a reflective element 113, the reflective element 113 is disposed on the base 1124, the light-emitting unit 1121 is disposed on the side of the reflective element 113 away from the base 1124, and the lens unit 1123 is disposed on the The side of the light-emitting component 112 away from the base 1124 is disposed on the base 1124 and covers the light-emitting unit 1121 .

In some embodiments, the lens unit 1123 may be a lens or a lens group with optical power, which is used to adjust the light emitted by the light emitting unit 1121 and project the light to the projection lens group 12 . For example, the lens unit 1123 can be a collimating lens or a collimating lens group with positive refractive power. The lens unit 1123 is used to collimate the light emitted by the light emitting unit 1121 and then project it to the projection lens group 12. With the configuration of the projection lens group 12, The parallelism of the overall light output from the display module 11 and the projection lens group 12 can be improved, thereby helping to improve the imaging quality of the near-eye display device 10 .

It can be understood that, when the lens unit 1123 is a spherical lens, the optical axis of the lens unit 1123 passes through the center of the surface of the lens unit 1123 away from the light emitting unit 1121 . Among the light rays emitted by the light emitting unit 1121, the propagation direction of the light passing through the center of the surface of the lens unit 1123 remains unchanged, while the light passing through the rest of the surface of the lens unit 1123 is usually deflected by the lens unit 1123 to change the propagation direction, so that the light emitting unit 1121 The outgoing light rays pass through the lens unit 1123 to form substantially parallel beams and exit. In the display module of a traditional near-eye display device, the optical axis of the lens unit of the light-emitting component usually overlaps with the central axis of the light-emitting unit, and the light emitted by the light-emitting unit along the central axis just passes through the center of the surface of the lens unit, while the rest of the light-emitting unit The light emitted from the position is usually deflected towards the center of the surface of the lens unit when passing through the surface of the projection unit, and the light emitted by the traditional light-emitting component is approximately symmetrically distributed relative to the center of the surface of the lens unit. Therefore, the chief light emitted by the traditional light-emitting component usually overlaps with the optical axis of the lens unit and the central axis of the light-emitting unit, resulting in the reflected light formed by the light guide module and the display module still located in the light-receiving cone of the projection lens group. In the corner, it is easy to return to the light guide module to produce ghost images.

As described with reference to FIG. 9 , in the light-emitting assembly 112 in some embodiments of the present application, the optical axis of the lens unit 1123 deviates from the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 , so that through the surface of the lens unit 1123 The outgoing angle of the light in the center of the light emitting unit 1121 is inclined to the central axis of the light emitting unit 1121 , in other words, the chief light emitted by the light emitting component 112 is inclined to the central axis of the light emitting unit 1121 . Thus, when the light-emitting component 112 is applied to the display module 11 of the near-eye display device 10, the light emitted by the light-emitting component 112 is reflected by the light guide module 13 and the display module 11, and at least part of the reflected light is located on the projection mirror group 12. Outside the range of the light-receiving cone angle, the projection lens group 12 cannot be projected into the light-guiding module 13, thereby achieving the effect of reducing at least part of the ghost image.

It should be noted that, in the embodiment shown in FIG. 9 , the lens unit 1123 deviates from the central axis of the light emitting unit 1121 along the direction perpendicular to the central axis of the light emitting unit 1121, that is, along the surface of the reflective element 113, but the lens unit 1123 The optical axis is still parallel to the central axis of the light emitting unit 1121 . In some other embodiments, the optical axis of the lens unit 1123 can also be inclined to the central axis of the light emitting unit 1121. The axis has a certain amount of deviation in the direction perpendicular to the central axis of the light emitting unit 1121 , so that the chief light emitted by the light emitting component 112 is inclined to the central axis of the light emitting unit 1121 .

In the near-eye display device 10 in some embodiments of the present application, by laterally shifting the lens unit 1123 of the light emitting component 112, the chief light emitted by the light emitting component 112 is inclined to the central axis of the light emitting unit 1121, while at the same time reducing at least part of the ghost image , will not affect the installation orientation of the light-emitting component 112 in the display module 11, nor will it change the installation orientation between any two of the display module 11, the projection lens assembly 12 and the light guide module 13, for example, no It will make the display module 11 and the light guide module 13 relatively tilted, and will not affect the outgoing direction of the light projected by the light guide module 13 to the eyeball of the user 20 . Therefore, the near-eye display device 10 of the present application can reduce at least part of the ghost images without excessively increasing the design and manufacturing difficulty of the near-eye display device 10 , and will not affect the viewing experience of the user 20 .

5, 9 and 10, it can be understood that the amount of offset between the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 affects the The angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is large. The larger the offset, the larger the angle between the chief ray and the central axis. Therefore, in the embodiment shown in FIG. 5 , as the viewing angle corresponding to the light-emitting component 112 increases, the angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting component 112 becomes larger, Therefore, the offset between the optical axis p of the lens unit 1123 in the light emitting assembly 112 and the central axis q of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 is larger.

Referring specifically to FIG. 10 , the abscissa shown in FIG. 10 is the field of view angle of the display module 11, and the ordinate is the optical axis of the lens unit 1123 relative to the central axis of the light emitting unit 1121 and perpendicular to the central axis of the light emitting unit 1121. The offset in direction. It can be seen from FIG. 5 and FIG. 10 that as the viewing angle increases, the included angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 gradually increases. Correspondingly, The greater the offset of the optical axis of the lens unit 1123 in the light emitting assembly 112 relative to the central axis of the light emitting unit 1121 in the direction perpendicular to the central axis of the light emitting unit 1121 is.

As shown in FIG. 10 and FIG. 11 , in some embodiments, in the light emitting assembly 112 located in the central field of view, the optical axis of the lens unit 1123 coincides with the central axis of the light emitting unit 1121 . And when the viewing angle is equal to half of the light-receiving cone angle of the projection lens group 12, that is, 10°, the included angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is also 10°. °, the offset between the optical axis of the lens unit 1123 in the light emitting assembly 112 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 is 4um. The embodiment in FIG. 10 corresponds to the embodiment in FIG. 5 , the offset of the optical axis of the lens unit 1123 relative to the central axis of the light emitting unit 1121 increases with the increase of the viewing angle, and the offset is related to the viewing angle proportional relationship.

Of course, in some other embodiments, the offset may not be directly proportional to the viewing angle, as long as at least part of the ghost image can be reduced. For example, in some other embodiments, in the light-emitting components 112 located in the quasi-central field of view and in the peripheral field of view, the offset of the optical axis of the lens unit 1123 relative to the central axis of the light-emitting unit 1121 is any applicable value greater than or equal to 4um. value, and the offset value of each light emitting component 112 may be equal or not. Of course, in the light-emitting assembly 112 located in the quasi-central field of view and in the peripheral field of view, the offset of the optical axis of the lens unit 1123 relative to the central axis of the light-emitting unit 1121 can also be between 2um and 4um, which can reduce part of the ghost image Effect.

Similarly, as shown in FIG. 7 and FIG. 12 , when the chief rays emitted by the light-emitting components 112 in the full field of view are all inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112 , the light-emitting components 112 in the full-field of view The optical axes of the lens unit 1123 deviate from the central axis of the light emitting unit 1121 . Moreover, the embodiment shown in FIG. 12 corresponds to FIG. 7 , and the included angles between the chief light rays emitted by the light-emitting component 112 in the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are all 15°. In the light-emitting assembly 112 within the full field of view, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is 12um. Of course, the offsets of the lens units 1123 in the light-emitting components 112 within the entire field of view may not be equal, as long as they are greater than or equal to 4um, so that ghost images within the entire field of view can be effectively reduced.

It can be understood that the light emitted by the light-emitting unit 1121 needs to be incident on the lens unit 1123 so that it can better project to the projection lens group 12. If the offset of the lens unit 1123 relative to the light-emitting unit 1121 is too large, it is easy to cause partial light cannot be deflected by the lens unit 1123 and projected to the projection lens group 12 . Therefore, in some embodiments, the offset between the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 is less than or equal to 12um, which can avoid excessive deviation of the lens unit 1123 The light emitting unit 1121 reduces the light extraction efficiency of the light emitting component 112 .

It can be understood that the specific numerical value of the offset between the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in the direction perpendicular to the central axis of the light emitting unit 1121 illustrated in this application is only based on the examples illustrated in this application. The corresponding relationship between the specific structure of the light-emitting component 1121 and the angle of the chief ray is the offset value listed. In fact, those skilled in the art can know that when the structural features of the light-emitting component 1121 change, the corresponding relationship between the chief ray angle and the above-mentioned offset may also change.

Specifically, in the embodiment shown in FIG. 9, the line connecting the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121, the central axis q of the light emitting unit 1121, and the chief ray r form a right-angled triangle. In this right-angled triangle, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is one of the right-angled sides Dimensions, the part of the central axis q of the light emitting unit 1121 in the right triangle is the other right side. It can be seen that, in the triangle, the offset between the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 is different from the central axis q of the light emitting unit 1121 in the triangle. The ratio of the size of the part is equal to the tangent of the angle between the chief ray r and the central axis q of the light emitting unit 1121 . In this application, the offset between the optical axis of the lens unit 1123 and the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121 can be calculated according to the above tangent relationship. It can be understood that when the structure of the lens unit 1123 changes, for example, the size of the lens unit 1123 in the axial direction changes, or the position of the center of the surface of the lens unit 1123 changes, resulting in a change in the position of the optical axis of the lens unit 1123, the light emitting unit The size of the part of the central axis q of 1121 in the triangle also changes. Correspondingly, the angle between the chief ray r and the central axis q of the light emitting unit 1121 (chief ray angle) is related to the optical axis of the lens unit 1123 and The corresponding relationship of the offset of the central axis of the light emitting unit 1121 in the direction perpendicular to the central axis of the light emitting unit 1121 will also change. To sum up, when the structure of the light-emitting component 112 changes, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in the direction perpendicular to the central axis of the light-emitting unit 1121 at the same chief ray angle may also change. The specific offset can be calculated from the above description, as long as an angle can be formed between the chief ray r and the central axis of the light emitting unit 1121 to achieve the effect of reducing at least part of the ghost light.

It should be noted that when the surface of the lens unit 1123 is a spherical surface, the optical axis of the lens unit 1123 passes through the center of the surface of the lens unit 1123 away from the light-emitting unit 1121, and the center of the surface of the lens unit 1123 away from the light-emitting unit 1121 and the center of the surface of the lens unit 1121 facing away from the light-emitting unit 1121 The line connecting the center of the surface of the lens unit 1123 can be regarded as coincident with the chief ray emitted by the light-emitting component 112, and the angle between the chief ray emitted by the light-emitting component 112 and the central axis of the light-emitting unit 1121 is equal to the distance between the lens unit 1123 and the light-emitting unit 1123. The included angle between the center of the surface of the unit 1121 and the center of the surface of the light emitting unit 1121 facing the center of the lens unit 1123 and the central axis of the light emitting unit 1121 .

It can be understood that, in the display module 11, there may be multiple light-emitting components 112 located in the peripheral field of view, and the orientations of the plurality of light-emitting components 112 located in the peripheral field of view on the substrate 111 may be different, so that the positions in the peripheral field of view are different. The light emitted by the light-emitting components 112 in all directions can be smoothly emitted into the projection lens group 12 , and the deviation direction of the lens unit 1123 of the light-emitting component 112 located in the peripheral field of view relative to the light-emitting unit 1121 can also be different. For example, referring to FIG. 3 , the two light-emitting assemblies 112 shown in FIG. 3 are located at the edge of the field of view, but the orientations of the two light-emitting assemblies 112 are different. In order to make the light emitted by the two light-emitting assemblies 112 incident on the projection lens group 12, the lens units 1123 of the two light-emitting assemblies 112 are all offset relative to the light-emitting unit 1121 toward the direction close to the central field of view, in other words, the two light-emitting assemblies 112 The lens units 1123 of the components 112 are shifted towards the direction of approaching each other relative to the respective light emitting units 1121 , therefore, the structures of the two light emitting components 112 can be distributed symmetrically with respect to the central field of view. The offset direction of the lens unit 1123 in the light-emitting assembly 112 located in other directions can be deduced by referring to the above-mentioned description, as long as the main light emitting direction of the light-emitting assembly 112 can be changed, and the light emitted by the light-emitting assembly 112 can be received by the projection lens group 12. Can.

The specific structural design of the light-emitting component 112 is not limited. In some embodiments, the surface of the light-emitting unit 1121 facing the reflective element 113 and the surface facing away from the reflective element 113 are both the light-emitting surface 1122 of the light-emitting unit 1121, wherein the light-emitting unit 1121 is facing the reflective element. The light emitted by the light emitting surface 1122 of 113 is directly incident on the surface of the lens unit 1123 , and the light emitted by the light emitting unit 1121 toward the light emitting surface 1122 of the reflective element 113 can be reflected by the reflective element 113 and then enter the surface of the lens unit 1123 . Thus, in some embodiments, the orthographic projection of the lens unit 1123 on the reflective element 113 covers the light output range of the light emitting unit 1121, for example, the lens unit 1123 covers the light output range of the light emitting unit 1121 away from the light output surface 1122 of the reflective element 113, and the lens The unit 1123 also covers the reflected light range where the light emitted by the light emitting unit 1121 toward the light-emitting surface 1122 of the reflective element 113 is reflected by the reflective element 113 toward the lens unit 1123, so that the lens unit 1123 can receive and project to the projection mirror group 12 to the greatest extent. The light emitted by the light emitting unit 1121 improves the light emitting efficiency of the light emitting component 112 . It can be understood that the light emitted by the light emitting unit 1121 can directly enter the lens unit 1123 or enter the lens unit 1123 after being reflected by the reflective element 113 .

Of course, in this application, the setting of the light-emitting component 112 is not limited to the above-mentioned description. In other embodiments, the lens unit 1123 may not be a hemispherical spherical mirror, and the lens unit 1123 of the light-emitting component 112 can also adopt other arrangements. The outgoing direction of the chief light of the light emitting component 112 is changed. For example, in some other embodiments, the lens unit 1123 can be an ellipse, or an aspherical lens, further, the lens unit 1123 can also include two or more lenses, by changing the orientation of the elliptical lens and the elliptical lens The position of the shaped lens relative to the light-emitting unit 1121, or changing the curvature of the aspheric lens and the law of curvature change, or by changing the orientation and position of multiple lenses relative to each other and relative to the light-emitting unit 1121, to adjust the position of the lens unit 1123 relative to the light-emitting unit 1121 The different positions of the central axis can adjust the light so as to change the outgoing direction of the chief light of the light-emitting component 112 , thereby achieving the effect of reducing at least part of the ghost image.

In this application, the reflective element 113 includes, but is not limited to, metal or dielectric material that is sputtered or evaporated on the substrate 1124 , and the light emitting unit 1121 may be a Micro LED chip grown on the reflective element 113 .

In some embodiments, the lens unit 1123 is disposed on the reflective element 113 and covers the light-emitting unit 1121, that is, except the surface of the light-emitting unit 1121 in contact with the reflective element 113, the rest of the surface of the light-emitting unit 1121 is wrapped by the lens unit 1123, thus The lens unit 1123 can not only provide insulation and structural protection for the light emitting unit 1121 , but also effectively project the light emitted by the light emitting unit 1121 to the projection lens group 12 . Of course, in some other embodiments, the lens unit 1123 can also be spaced apart from the reflective element 113 and located on the side of the light emitting unit 1121 facing away from the reflective element 113, as long as the orthographic projection of the lens unit 1123 on the reflective element 113 can cover The light emitting range of the light emitting unit 1121 is sufficient.

In the embodiment shown in FIG. 3 and FIG. 4, the display module 11 can be a Micro LED display, and all the light-emitting components 112 in the display module 11 can be arranged on the same substrate 111, and all the light-emitting components 112 are on the substrate. 111 are arranged in an array on the same surface.

Of course, the near-eye display device 10 of the present application can also adopt any other suitable display module 11 . Referring to FIG. 13 , in some embodiments, the display module 11 of the near-eye display device 10 can be a self-illuminating single-panel color Micro-LED micro-display, and the display module 11 can include a light-combining prism 114, and the light-combining prism 114 Can combine light prisms for X-Cube. In this embodiment, the light emitting components 112 of the display module 11 are used to emit monochromatic light in the visible light range, and the display module 11 includes three substrates 111 . Wherein, part of the light emitting components 112 is used to emit red light, part of the light emitting components 112 is used to emit green light, and part of the light emitting components 112 is used to emit blue light. Moreover, the light emitting component 112 for emitting red light is arranged on one of the substrates 111, and forms a red light module 115 with the substrate 111, and the light emitting component 112 for emitting green light is arranged on the other substrate 111, and is combined with the substrate 111. The substrate 111 forms a green light module 116 , and the light-emitting component 112 for emitting blue light is disposed on another substrate 111 , and forms a blue light module 117 with the substrate 111 . The red light module 115, the green light module 116, and the blue light module 117 are respectively arranged on different sides of the light combining prism 114, for example, the red light module 115 and the blue light module 117 are respectively arranged on opposite sides of the light combining prism 114, and the green light module 116 is disposed on the side of the light-combining prism 114 facing away from the projection lens group 12 .

In this embodiment, the red light module 115, the green light module 116 and the blue light module 117 all emit light toward the light combining prism 114, and the light emitted by the red light module 115, the green light module 116 and the blue light module 117 are integrated by the light combining prism 114 Then projected to the projection lens group 12 , and then projected to the light guide module 13 by the projection lens group 12 . It can be understood that, in this embodiment, in the red light module 115, the green light module 116 and the blue light module 117, some of the light emitting components 112 are located in the central field of view of the display module 11, and some of the light emitting components 112 are located in the display module 11. The quasi-central field of view, part of the light-emitting components 112 are located in the peripheral field of view of the display module 11, and the structure of the light-emitting components 112 can be the same as the embodiment shown in FIG. 9 . Therefore, the setting and arrangement of the light emitting components 112 in the display module 11 can be obtained with reference to FIG. 5, FIG. 7, FIG. 10 and FIG. The chief rays emitted by the light-emitting components 112 are all inclined to the central axis of the light-emitting surface 1122 of the light-emitting components 112, or the chief rays emitted by the light-emitting components 112 of the full field of view in the red light module 115, the green light module 116 and the blue light module 117 All are inclined to the central axis of the light emitting surface 1122 of the light emitting component 112 . More configurations of the light-emitting component 112 in this embodiment can be deduced from the above description, and will not be repeated here. Of course, the type of the display module 11 of the near-eye display device 10 is not limited thereto, and the near-eye display device 10 can also adopt any suitable display module 11 that can satisfy AR or MR imaging, as long as the display module 11 located in the peripheral field of view The chief light emitted by the light emitting component 112 can be inclined to the central axis of the light emitting surface 1122 of the light emitting component 112 to reduce at least part of the ghost image.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (24)

1. A light emitting assembly, comprising:

a substrate;

a light emitting unit disposed on the substrate; and the number of the first and second groups,

the lens unit is arranged on the light emitting side of the light emitting unit, and the optical axis of the lens unit is perpendicular to the central axis of the light emitting unit and deviates from the central axis of the light emitting unit in the direction of the central axis.

2. The lighting assembly of claim 1, wherein an amount of deviation of the optical axis of the lens unit from a central axis of the lighting unit in a direction perpendicular to the central axis is greater than or equal to 2um.

3. The light assembly of claim 2, wherein an amount of deviation of the optical axis of the lens unit from a central axis of the light unit in a direction perpendicular to the central axis is greater than or equal to 4um, and less than or equal to 12um.

4. The light assembly of claim 1, wherein a line connecting a center of a surface of the lens unit facing away from the light unit and a center of a surface of the light unit facing toward the lens unit makes an angle greater than or equal to 5 ° with a central axis of the light unit.

5. The light emitting assembly of claim 1, wherein a line connecting a center of a surface of the lens unit facing away from the light emitting unit and a center of a surface of the light emitting unit facing toward the lens unit forms an included angle with a central axis of the light emitting unit, the included angle being greater than or equal to 10 ° and less than or equal to 30 °.

6. The lighting assembly of claim 1, wherein the lens unit is disposed on a side of the substrate adjacent to the light emitting unit and at least partially covers the light emitting unit.

7. The light-emitting assembly according to claim 1, further comprising a reflective element disposed between the substrate and the light-emitting unit, wherein the light-emitting unit has a light-emitting surface facing the reflective element and a light-emitting surface facing away from the reflective element, and a front projection of the lens unit on the reflective element covers a light-emitting range of the light-emitting unit.

8. The lighting assembly of claim 1, wherein the optical axis of the lens unit is parallel to the central axis of the lighting unit.

9. A display module assembly, has central visual field and marginal visual field, its characterized in that, the display module assembly includes:

a substrate; and (c) a second step of,

and the light-emitting assemblies are arranged on the substrate in an array manner, wherein the edge view field is formed by inclining principal rays emitted by the light-emitting assemblies to the central axis of the light-emitting surfaces of the light-emitting assemblies.

10. The display module of claim 9, wherein an angle between a chief ray emitted from the light emitting element in the peripheral field of view and a central axis of a light emitting surface of the light emitting element is greater than or equal to 5 °.

11. The display module according to claim 10, wherein an included angle between a chief ray emitted from the light emitting element in the peripheral field of view and a central axis of a light emitting surface of the light emitting element is greater than or equal to 10 ° and less than or equal to 30 °.

12. The display module of claim 9, wherein a chief ray emitted from the light emitting element in the central field of view is parallel to a central axis of a light emitting surface of the light emitting element.

13. The display module according to claim 9, wherein an included angle between a principal ray emitted from the light emitting assembly and a central axis of a light emitting surface of the light emitting assembly is gradually increased in a direction in which the central field of view points to the edge field of view.

14. The display module according to claim 13, wherein an included angle between a principal ray emitted from the light emitting element and a central axis of a light emitting surface of the light emitting element is equal to a corresponding field angle of the light emitting element.

15. The display module according to claim 9, wherein the chief rays emitted from the light emitting elements in the full field of view are inclined to the central axis of the light emitting surfaces of the light emitting elements.

16. The display module according to claim 15, wherein the included angle between the principal ray emitted from the light emitting element and the central axis of the light emitting surface of the light emitting element in the full view field range is equal.

17. The display module according to claim 9, wherein the light emitting assembly comprises a substrate, a light emitting unit and a lens unit, the light emitting unit is disposed on the substrate, the lens unit is disposed on a light emitting side of the light emitting unit, wherein an emergent principal ray is inclined from a central axis of a light emitting surface in the light emitting assembly, and an optical axis of the lens unit deviates from the central axis of the light emitting unit in a direction perpendicular to the central axis of the light emitting unit.

18. The display module according to claim 17, wherein the deviation between the optical axis of the lens unit and the central axis of the light emitting unit in a direction perpendicular to the central axis is greater than or equal to 2um.

19. The display module according to claim 18, wherein the deviation between the optical axis of the lens unit and the central axis of the light-emitting unit in the direction perpendicular to the central axis is greater than or equal to 4um and less than or equal to 12um.

20. The display module of claim 17, wherein the lens unit is disposed on the substrate and covers the light emitting unit.

21. The display module according to claim 17, wherein the light-emitting assembly further comprises a reflective element disposed between the substrate and the light-emitting unit, the light-emitting unit has a light-emitting surface facing the reflective element and a light-emitting surface facing away from the reflective element, and an orthographic projection of the lens unit on the reflective element covers a light-emitting range of the light-emitting unit.

22. The display module according to claim 9, further comprising a light-combining prism, wherein a portion of the light-emitting assemblies are configured to emit red light, a portion of the light-emitting assemblies are configured to emit green light, and a portion of the light-emitting assemblies are configured to emit blue light, wherein the light-emitting assemblies configured to emit red light, the light-emitting assemblies configured to emit green light, and the light-emitting assemblies configured to emit blue light are respectively disposed on different sides of the light-combining prism.

23. A near-eye display apparatus comprising a projection lens assembly, a light guide module and the display module according to any one of claims 9-22, wherein the projection lens assembly is disposed between the light guide module and the display module.

24. A near-eye display device as claimed in claim 23 wherein the angle between the chief ray from the light emitting element in the peripheral field of view and the central axis of the light emitting surface of the light emitting element is greater than or equal to half of the light collection angle of the projecting lens group in the corresponding position.

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