CN116524547A - display device - Google Patents

Abstract

The present application provides a display device with a fingerprint detection area, the display device includes: a substrate, a light-emitting unit, arranged on the substrate, used to emit visible light as excitation light for fingerprint identification; the excitation light is irradiated to The finger above the fingerprint detection area is used to form fingerprint detection light carrying fingerprint information on the finger; the optical sensing unit is arranged on the substrate and is used to receive the fingerprint detection light to collect the fingerprint detection light. The fingerprint image of the finger; the first light-gathering structure and/or the second light-gathering structure, the first light-gathering structure is located on the side of the light-emitting unit away from the substrate, and is used to gather the excitation light; the The second light concentrating structure is located on a side of the optical sensing unit away from the substrate, and is used for concentrating the fingerprint detection light. The light utilization rate of the display device is high, the fingerprint identification is accelerated, and the fingerprint identification effect is improved.

Description

display device

technical field

The present invention relates to the field of display technology, in particular to a display device.

Background technique

Fingerprint recognition has become a function that most display devices such as mobile phones and tablet computers are equipped with. As smartphones enter the era of full screens, the screen-to-body ratio of mobile phones is getting larger and larger, and the fingerprint recognition technology under the screen has become a trend.

At present, the display device uses the self-luminous display unit as the light source to illuminate the screen. The light emitted by the self-luminous display unit in the fingerprint detection area of the display screen forms a light spot and irradiates the finger above the display screen to form a fingerprint detection light. The fingerprint detection light returns and After passing through the display screen, it is received by the optical fingerprint sensor under the display screen, and the fingerprint image acquisition is realized through the optical fingerprint sensor to further realize fingerprint identification.

However, the light utilization rate of the existing display device is low, and the fingerprint recognition effect is poor.

Contents of the invention

The present application provides a display device, which aims to solve the problems of low light utilization efficiency and poor fingerprint recognition effect of existing display devices.

In order to solve the above technical problems, a technical solution adopted by this application is to provide a display device having a fingerprint detection area, the display device comprising: a substrate, a light emitting unit, an optical sensing unit and a first light concentrating structure And/or the second light-gathering structure; wherein, the light-emitting unit is arranged on the substrate, and is used to emit visible light as excitation light for fingerprint identification; the excitation light is irradiated to the finger above the fingerprint detection area, so as to The finger forms fingerprint detection light carrying fingerprint information; an optical sensing unit is arranged on the substrate for receiving the fingerprint detection light to collect a fingerprint image of the finger; the first light-gathering structure and/or or a second light concentrating structure, the first light concentrating structure is located on the side of the light emitting unit away from the substrate, and is used to concentrate the excitation light; the second light concentrating structure is located on the optical sensing unit The side away from the substrate is used to gather the fingerprint detection light.

In one embodiment, also includes:

An encapsulation layer is disposed on a side of the light emitting unit and the optical sensing unit away from the substrate; the first light concentrating structure and/or the second light concentrating structure is disposed in the encapsulation layer.

In one embodiment, the encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer stacked in sequence; the second inorganic layer is located on a side of the first inorganic layer away from the substrate;

Wherein, the first light concentrating structure and/or the second light concentrating structure are located between the first inorganic layer and the organic layer.

In one embodiment, also includes:

The pixel definition layer is defined to form a pixel opening, and part of the light emitting unit and the optical sensing unit are formed in the pixel opening; the first inorganic layer is provided on the side of the pixel definition layer away from the substrate , and forming a groove at a position corresponding to the pixel opening;

The first light concentrating structure is located between the first inorganic layer and the organic layer, and part of the first light concentrating structure is embedded in the groove, and the rest of the first light concentrating structure covers the notch of the groove; and the orthographic projection of the first light concentrating structure on the substrate covers the orthographic projection of the light emitting unit on the substrate; and/or

The second light concentrating structure is located between the first inorganic layer and the organic layer, and the entire second light concentrating structure is embedded in the groove.

In one embodiment, also includes:

a pixel defining layer, defining and forming pixel openings;

The encapsulation layer includes a first inorganic layer, a first organic layer, a second organic layer, and a second inorganic layer stacked in sequence; the first organic layer is stacked on the side of the first inorganic layer away from the substrate a surface for planarizing the pixel opening; the second inorganic layer is stacked on the surface of the first inorganic layer facing away from the substrate;

Wherein, the first light concentrating structure is located between the first organic layer and the second organic layer;

Preferably, the orthographic projection of the first light concentrating structure on the substrate covers the orthographic projection of the light emitting unit on the substrate;

Preferably, parts of the light emitting unit and the optical sensing unit are formed in the pixel opening; the first inorganic layer is provided on the side surface of the pixel defining layer away from the substrate, and is formed on the side corresponding to the pixel opening. A groove is formed at the position of the pixel opening;

The second light concentrating structure is located between the first inorganic layer and the first organic layer, and the entire second light concentrating structure is embedded in the groove.

In one embodiment, also includes:

an encapsulation layer disposed on a side of the light emitting unit and the optical sensing unit away from the substrate;

a protective layer disposed on a surface of the encapsulation layer facing away from the substrate;

Wherein, the first light concentrating structure is arranged in the protective layer.

In one embodiment, the protective layer includes a first protective layer, a functional layer, and a second protective layer stacked in sequence, wherein the functional layer protrudes in a direction away from the substrate at a position corresponding to the light-emitting unit. , to form the first light concentrating structure; the functional layer protrudes toward the direction close to the substrate corresponding to the position of the optical sensing unit, so as to form the second light concentrating structure.

In one embodiment, the light emitting unit and the optical sensing unit are arranged in the same layer.

In one embodiment, the material of the first light concentrating structure and the second light concentrating structure is quantum dots; and/or

The refractive index of the first light concentrating structure is greater than the refractive index of other structures between the light emitting unit and the first light concentrating structure; the refractive index of the second light concentrating structure is greater than that of the second light concentrating structure The refractive index of other structures between the screen and the display;

Preferably, the light emitting unit includes a green light emitting unit, and the quantum dots are green light quantum dots.

In one embodiment, the first light concentrating structure is a convex lens structure, and the second light concentrating structure is a concave lens structure.

The beneficial effect of the embodiment of the present application is different from the prior art: the display device provided by the embodiment of the present application can use the first light-concentrating structure to emit light by setting the first light-concentrating structure on the side of the light-emitting unit away from the substrate. The visible light emitted by the unit is converged, which increases the amount of light irradiated by the visible light to the fingerprint detection area, and improves the light output of the visible light; by setting the second light concentrating structure on the side of the optical sensing unit away from the substrate, it can be used. The second light concentrating structure converges the fingerprint detection light reflected or refracted by the finger, which increases the amount of the fingerprint detection light received by the optical sensing unit and improves the light utilization rate of the fingerprint detection light. The display device passes the first The first light-gathering structure and the second light-gathering structure gather the light emitted by the light-emitting unit to realize fast fingerprint identification and effectively improve the fingerprint identification effect.

Description of drawings

FIG. 1 is a schematic vertical cross-sectional view of a display device provided by an embodiment of the present application;

FIG. 2 is a schematic vertical cross-sectional view of a display device provided by a specific embodiment of the present application;

Fig. 3 is a schematic vertical cross-sectional view of a display device provided by another specific embodiment of the present application;

FIG. 4 is a schematic vertical cross-sectional view of a display device provided by another specific embodiment of the present application.

Explanation of reference signs

1-substrate; 2-drive layer; 3-pixel definition layer; 4-light-emitting unit; 41-first electrode; 42-light-emitting layer; 43-second electrode; 5-optical sensing unit; 51-third electrode ; 52-photoelectric conversion layer 53-the fourth electrode; 6-the first concentrating structure; 7-the second concentrating structure; 822-second organic layer; 83-second inorganic layer; 9-protective layer; 91-first protective layer; 92-functional layer; 93-second protective layer.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first", "second", and "third" in this application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship between the various components in a certain posture (as shown in the drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In related technologies, with the full screen and extreme thinness of terminal equipment, it is necessary to integrate the fingerprint recognition module under the screen or on the screen. Currently, off-screen optical and ultrasonic fingerprint modules have become the mainstream in the market, with good performance and mature technology, but additional modules also push up the terminal cost and occupy additional space. Therefore, it is necessary to develop a fingerprint identification module that can be integrated on the screen or in the screen to reduce the cost and simplify the structure. At the same time, the integration of the fingerprint identification module and the screen itself is also conducive to the realization of the thinner and lighter machine.

In the display device provided by the embodiment of the present application, the fingerprint identification module is integrated in the screen, which can improve the fingerprint identification effect and realize fast fingerprint identification.

The application will be described in detail below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 1 . FIG. 1 is a schematic vertical cross-sectional view of a display device provided by an embodiment of the present application. In this embodiment, a display device having a fingerprint detection area is provided. When the user needs to unlock the display device or perform other fingerprint verification, he only needs to press his finger on the fingerprint detection area to realize fingerprint input. The display device may include a display area, and a part of the display area may be multiplexed as a fingerprint detection area. All display areas of the display device can realize fingerprint input. Alternatively, a part of the display area of the display device can realize fingerprint input, that is, only need to press a finger on the display area to realize fingerprint input.

In some embodiments, the display device includes a substrate 1 , a light emitting unit 4 , an optical sensing unit 5 , and a first light concentrating structure 6 and/or a second light concentrating structure 7 . The substrate 1 may be a flexible substrate. The material of the substrate 1 may include any suitable insulating material having flexibility. For example, the material of the substrate 1 may include polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate At least one of polymer materials such as alcohol ester (PEN), polyarylate (PAR) or glass fiber reinforced plastic (FRP). The substrate 1 may be transparent, translucent or opaque.

The light emitting unit 4 and the optical sensing unit 5 are disposed on the substrate 1 , and the light emitting unit 4 and the optical sensing unit 5 are disposed on the same side of the substrate 1 . The arrangement of the optical sensing unit 5 on the substrate 1 is beneficial to reduce the path of the fingerprint detection light incident on the optical sensing unit 5 , thereby improving the light utilization rate and improving the fingerprint identification effect. The light emitting unit 4 and the optical sensing unit 5 may be arranged on the same layer.

The light emitting unit 4 includes a first electrode 41 , a light emitting layer 42 and a second electrode 43 stacked in sequence. The first electrode 41 may be an anode, and correspondingly, the second electrode 43 is a cathode. The optical sensing unit 5 includes a third electrode 51 , a photoelectric conversion layer 52 and a fourth electrode 53 stacked in sequence. The third electrode 51 may be an anode, and correspondingly, the fourth electrode 53 is a cathode. The first electrode 41 and the third electrode 51 form an anode layer. The first electrode 41 and the third electrode 51 may be arranged in the same layer, and the materials of the first electrode 41 and the third electrode 51 may be the same. The second electrode 43 and the fourth electrode 53 form a cathode layer. The second electrode 43 and the fourth electrode 53 may be arranged in the same layer, and the materials of the second electrode 43 and the fourth electrode 53 may be the same. The first electrode 41 and the third electrode 51 may be spaced apart, and the second electrode 43 and the fourth electrode 53 may be spaced apart or connected to each other. When forming the cathode, a whole layer of cathode can be prepared, and cathodes in different regions constitute the second electrode 43 and the fourth electrode 53 respectively. The display device may further include a driving layer 2 for driving the light emitting unit 4 and the optical sensing unit 5 . The driving layer 2 is located between the light emitting unit 4 and the substrate 1 . The optical sensing unit 5 may be an organic optical sensor, and the light emitting unit 4 may be an organic light emitting device.

The display device may only include the first light concentrating structure 6, and the first light concentrating structure 6 is arranged on the side of the light emitting unit 4 away from the substrate 1 to concentrate the excitation light; or, the display device may only include the second light concentrating structure 7. The second light concentrating structure 7 is located on the side of the optical sensing unit 5 away from the substrate 1 to concentrate the fingerprint detection light; or, the display device includes a first light concentrating structure 6 and a second light concentrating structure Structure 7. The orthographic projection of the first light concentrating structure 6 on the substrate 1 at least partially covers the orthographic projection of the light emitting unit 4 on the substrate 1 to concentrate the excitation light. The orthographic projection of the second light concentrating structure 7 on the substrate 1 at least partially covers the orthographic projection of the optical sensing unit 5 on the substrate 1 to concentrate the fingerprint detection light.

In some embodiments, the second light concentrating structure 7 may be provided on the side of some optical sensing units 5 away from the substrate 1; or, on the side of each optical sensing unit 5 away from the substrate 1 Both are provided with a second light concentrating structure 7 . In some embodiments, the first light-concentrating structure 6 can be provided on the side of some light-emitting units 4 away from the substrate 1; Concentrating structure6.

In one embodiment, the display device further includes a pixel defining layer 3, which is disposed on the side of the anode layer away from the substrate 1, and defines and forms several pixel openings, at least part of the anode layer exposes the pixel defining layer 3 through the several pixel openings and faces away from the substrate. One side surface of bottom 1. Wherein, several pixel openings may be distributed in an array. The anode layer includes a first electrode 41 and a third electrode 51 .

Both the light emitting unit 4 and the optical sensing unit 5 are disposed on the substrate 1 and corresponding to the pixel openings. The light-emitting unit 4 is used to emit visible light as the excitation light for fingerprint identification; as shown in Figure 1, the excitation light is irradiated to the finger (not shown) above the fingerprint detection area to form fingerprint detection light carrying fingerprint information on the finger; The fingerprint detection light is reflected by the finger, and is irradiated to the optical sensing unit 5 through the display screen; the optical sensing unit 5 receives the fingerprint detection light to collect the fingerprint image of the finger for fingerprint identification. The optical sensing unit 5 includes an organic photodetector (OPD); the optical sensing unit 5 may specifically be an existing fingerprint identification module, and its specific structure and functions may refer to the existing fingerprint identification module located below the display screen.

As shown in FIG. 1 , three light emitting units 4 and one optical sensing unit 5 are taken as an example for illustration in FIG. 1 . The light emitting unit 4 includes a light emitting unit of a first color, a light emitting unit of a second color and a light emitting unit of a third color, wherein one light emitting unit 4 corresponds to one pixel opening. Part of the light-emitting unit 4 may be located in the pixel opening, and the rest is formed on the surface of the pixel defining layer 3 facing away from the substrate 1 . For details, please refer to existing related designs, which will not be repeated here. Wherein, the first color, the second color and the third color are red, green and blue respectively.

In some embodiments, the light emitting unit 4 and the optical sensing unit 5 are arranged in the same layer; thus, the light emitting unit 4 and the optical sensing unit 5 can be fabricated simultaneously by the same process, which can simplify the process. Specifically, both the light emitting unit 4 and the optical sensing unit 5 can be formed by an evaporation process using a fine metal mask (FMM).

The first light concentrating structure 6 is located on the side of the light emitting unit 4 away from the substrate 1 , and is used for concentrating the light emitted by the light emitting unit 4 , so as to improve light utilization efficiency. In a specific embodiment, a first light-concentrating structure 6 is correspondingly arranged on the light-emitting side of each light-emitting unit 4, so that the light emitted by the corresponding light-emitting unit 4 can be collected through the first light-concentrating structure 6, thereby improving the light-emitting unit. 4 light output.

In a specific embodiment, a first light concentrating structure 6 may be provided on the light emitting side of the green light emitting unit 4 to concentrate the green light emitted by the green light emitting unit 4 . In this embodiment, the material of the first light-concentrating structure 6 can further choose green light quantum dots, so that the quantum dots at the corresponding positions can be excited to emit light again by the photons emitted by the green light-emitting unit 4, thereby effectively improving the luminous efficiency of the green light-emitting unit 4, Increase the purity of green light to further improve the utilization rate of green light.

Specifically, the refractive index of the first light concentrating structure 6 can be greater than the refractive index of other structures between the first light concentrating structure 6 and the corresponding light emitting unit 4, so that more light is refracted to the fingerprint detection area, improving light utilization. Rate.

Those skilled in the art can understand that when the light emitting side corresponding to the red light emitting unit 4 is also provided with the first light concentrating structure 6, the material of the corresponding first light concentrating structure 6 is red light quantum dots, so that the red light emitting unit 4 emits photons to excite the quantum dots at the corresponding positions to emit light again, thereby effectively improving the luminous efficiency of the red light emitting unit 4, increasing the purity of red light, and further improving the utilization rate of red light.

In some embodiments, the optical sensing unit 5 is sensitive to light in a first wavelength range, the light emitting unit 4 includes a first light emitting unit and a second light emitting unit, and the wavelength of the excitation light emitted by the first light emitting unit is at least partly the same as the first wavelength. overlap in the wavelength range. A first light concentrating structure 6 is provided at least on a side of the first light emitting unit away from the substrate 1 . Wherein, the first light emitting unit may be a green light emitting unit; the optical sensing unit 5 is a photosensitive device sensitive to green light.

In some embodiments, as shown in FIG. 1 , the first light concentrating structure 6 can be a convex lens structure, that is, the surface of the first light concentrating structure 6 facing away from the substrate 1 forms at least one convex surface; to further condense light by utilizing the principle of a convex lens The light emitted by the unit 4 further improves the utilization rate of the corresponding light, accelerates fingerprint recognition and improves the recognition effect. Specifically, the surface of the first light concentrating structure 6 facing away from the substrate 1 may form a whole continuous convex surface; or, the surface of the first light concentrating structure 6 facing away from the substrate 1 may also form multiple convex surfaces.

The second light concentrating structure 7 is located on the side of the optical sensing unit 5 away from the substrate 1, and is used to gather the fingerprint detection light, thereby improving the utilization rate of the fingerprint detection light and increasing the light received by the optical sensing unit 5 to further accelerate fingerprint detection. Identify and improve the recognition effect.

Wherein, the material of the second light concentrating structure 7 can be quantum dots, so that the second light concentrating structure 7 can be excited to emit light again by the fingerprint detection photons, so as to effectively improve the luminous efficiency of the fingerprint detection light and further improve the light utilization rate.

In some embodiments, the refractive index of the second light concentrating structure 7 may be greater than that of other structures between the display screen and the second light concentrating structure 7, so that more fingerprint detection light is refracted to the second light concentrating structure 7. Further improve the light utilization rate.

In some embodiments, the second light concentrating structure 7 can be a concave lens structure, that is, at least one concave surface is formed on the side surface of the second light concentrating structure 7 away from the substrate 1; to further gather the fingerprint detection light by using the principle of a concave lens, thereby further improving Corresponding to the utilization rate of light, it accelerates fingerprint recognition and improves the recognition effect. In a specific embodiment, the second light concentrating structure 7 forms an entire continuous concave surface. Certainly, in other specific embodiments, the second light concentrating structure 7 may also form multiple concave surfaces. It should be noted that the convex surface involved in this application all refers to the surface of the first light concentrating structure 6 away from the substrate 1 protruding toward the direction away from the substrate 1; the concave surface refers to the second light concentrating structure 7 facing away from the substrate 1. One side surface of the substrate 1 is recessed toward a direction close to the substrate 1 . Those skilled in the art can understand that the first light concentrating structure 6 and/or the second light concentrating structure 7 may also be a rectangular structure, a trapezoidal structure or other irregular structures.

Wherein, the first light concentrating structure 6 and/or the second light concentrating structure 7 can be made by inkjet printing process.

With the above arrangement, by setting the first light-gathering structure 6 on the side of the light-emitting unit 4 away from the substrate 1, the first light-gathering structure 6 can be used to gather the visible light emitted by the light-emitting unit 4, increasing the visible light irradiation to fingerprint detection. The amount of light in the region improves the light output of visible light, and the light utilization rate is higher; at the same time, by setting the second light-gathering structure 7 on the side of the optical sensing unit 5 away from the substrate 1, the second light-gathering structure 7 can be used The structure 7 converges the fingerprint detection light reflected back by the finger, which increases the amount of light received by the optical sensing unit 5 for the fingerprint detection light. The emitted light is converged twice, which effectively improves the light utilization rate of the fingerprint detection light. The display device converges the light emitted by the light-emitting unit 4 through the first light-gathering structure 6 and the second light-gathering structure 7, realizing fast fingerprint detection. Recognition, effectively improving the fingerprint recognition effect.

The encapsulation layer 8 is arranged on the side of the light emitting unit 4 and the optical sensing unit 5 facing away from the substrate 1, and is used to prevent water, oxygen, etc. Corrosion, thereby prolonging the life of the display device. Wherein, the first light concentrating structure 6 and/or the second light concentrating structure 7 can be specifically disposed in the encapsulation layer 8 . Compared with the scheme of setting the first light concentrating structure 6 and/or the second light concentrating structure 7 in other structural layers on the side of the encapsulation layer 8 away from the substrate 1; the first light concentrating structure 6 and the light emitting unit can be 4 is closer, the first light-gathering structure 6 can gather more visible light emitted by the light-emitting unit 4 to improve light utilization; at the same time, the distance between the second light-gathering structure 7 and the optical sensing unit 5 can be made closer, The fingerprint detection light collected by the second light concentrating structure 7 can be transmitted to the optical sensing unit 5 more, so as to utilize the utilization rate of the fingerprint detection light.

In some specific embodiments, refer to FIG. 2 , which is a schematic vertical cross-sectional view of a display device provided by a specific embodiment of the present application. The encapsulation layer 8 includes a first inorganic layer 81 , an organic layer 82 and a second inorganic layer 83 stacked in sequence. Wherein, the first inorganic layer 81 is provided on the side surface of the pixel defining layer 3 facing away from the substrate 1, and wraps and covers the light emitting unit 4 and the optical sensing unit 5; and forms a groove at a position corresponding to the pixel opening; the second inorganic layer 83 is located on the side of the first inorganic layer 81 away from the substrate 1 . Wherein, the material of the first inorganic layer 81 and/or the second inorganic layer 83 may be silicon nitride. The organic layer 82 can be produced by inkjet printing.

In this specific embodiment, the first light concentrating structure 6 and/or the second light concentrating structure 7 can be specifically located between the first inorganic layer 81 and the organic layer 82; so that the first light concentrating structure 6 is closer to the light emitting unit 4 , making the second light concentrating structure 7 closer to the optical sensing unit 5 .

Specifically, referring to FIG. 2, the first light concentrating structure 6 is located between the first inorganic layer 81 and the organic layer 82, and part of the first light concentrating structure 6 is embedded in the groove, and the rest of the first light concentrating structure 6 is covered. The notch of the groove, and the orthographic projection of the first light concentrating structure 6 on the substrate 1 covers the orthographic projection of the light emitting unit 4 on the substrate 1; All visible light is converged, reducing the dispersion of visible light and improving the utilization rate of light.

Further, the second light concentrating structure 7 is also located between the first inorganic layer 81 and the organic layer 82 , and the entire second light concentrating structure 7 is embedded in the pixel opening. In this way, in the manufacturing process of the second light concentrating structure 7, the second light concentrating structure 7 can be obtained by direct spraying with the help of the limitation of the pixel opening, without any other special treatment, and the process is simple; at the same time, the pixel opening can be used The side walls of the second light concentrating structure 7 block the fingerprint detection light converged to avoid further dispersion of the fingerprint detection light converged, which can further improve the utilization rate of the fingerprint detection light.

Of course, the second light concentrating structure 7 can also be located between the organic layer 82 and the second inorganic layer 83 , or on the side of the second inorganic layer 83 away from the organic layer 82 .

In another specific embodiment, referring to FIG. 3, FIG. 3 is a schematic vertical cross-sectional view of a display device provided in another specific embodiment of the present application; different from the specific embodiment shown in FIG. 2 above, the organic layer 82 includes The first organic layer 821 and the second organic layer 822 are laminated. Wherein, the first organic layer 821 is laminated on the surface of the first inorganic layer 81 facing away from the substrate 1 for planarizing the pixel opening; the second inorganic layer 83 is laminated on the surface of the first inorganic layer 81 facing away from the substrate 1 . In this specific embodiment, the first light concentrating structure 6 may be specifically located between the first organic layer 821 and the second organic layer 822 .

In this specific embodiment, the second light concentrating structure 7 is located between the first inorganic layer 81 and the first organic layer 821 , and the entire second light concentrating structure 7 is embedded in the pixel opening. Of course, the second light concentrating structure 7 can also be located between the first organic layer 821 and the second organic layer 822 ; or between the second organic layer 822 and the second inorganic layer 83 .

In yet another specific embodiment, refer to FIG. 4 , which is a schematic vertical cross-sectional view of a display device provided in another specific embodiment of the present application. The display device further includes a protective layer 9 disposed on a surface of the encapsulation layer 8 facing away from the substrate 1 . In this specific embodiment, the first light concentrating structure 6 is specifically disposed in the protective layer 9 .

In some embodiments, the protective layer 9 includes a first protective layer 91 , a functional layer 92 and a second protective layer 93 stacked in sequence. Wherein, the first protective layer 91 is provided on the surface of the encapsulation layer 8 facing away from the substrate 1, the functional layer 92 is stacked between the first protective layer 91 and the second protective layer 93, and the functional layer 92 corresponds to the position of the light emitting unit 4 The functional layer 92 protrudes toward the direction away from the substrate 1 to form the first light concentrating structure 6 ; the functional layer 92 corresponding to the position of the optical sensing unit 5 protrudes toward the direction close to the substrate 1 to form the second light concentrating structure 7 .

Wherein, the first protective layer 91 and the second protective layer 93 are made of the same material, specifically optical glue (OC glue), which plays a certain role of buffering and protection. The material of the functional layer 92 may be quantum dots, such as green light quantum dots. The refractive index of the functional layer 92 is greater than the refractive index of other structures between the light emitting unit 4 and the functional layer 92 ; and greater than the refractive index of other structures between the functional layer 92 and the display screen. In a specific embodiment, the functional layer 92 can be produced by spin coating, slit coating, inkjet printing and the like.

Specifically, the thickness of the functional layer 92 can be smaller than the thickness of the first protective layer 91 and/or the second protective layer 93; to weaken the influence of the functional layer 92 on the thickness of the entire display device as much as possible, and meet the thinning requirements of the display device .

Of course, the display device also includes a filter layer (Filter), a light guide layer or an optical path guiding structure, and other optical elements. The filter layer can be used to filter out ambient light or other disturbing light that penetrates the finger, and the light guide layer or light path guiding structure is mainly used to guide the fingerprint detection light formed by the finger above the display screen and returned through the display screen To the second light-gathering structure 7 for optical detection to realize fingerprint image acquisition, wherein the fingerprint detection light can be the excitation light emitted by the fingerprint excitation light source and irradiates the finger above the display screen, and the finger is reflected, scattered or transmitted. Light signal with finger print information.

In the display device provided by this embodiment, by setting the first light-concentrating structure 6 on the side of the light-emitting unit 4 away from the substrate 1, the first light-concentrating structure 6 can be used to converge the visible light emitted by the light-emitting unit 4, increasing the The amount of light emitted by visible light to the fingerprint detection area increases the light output of visible light; at the same time, by setting the second light-gathering structure 7 on the side of the optical sensing unit 5 away from the substrate 1, the second light-gathering structure can be used 7. Converging the fingerprint detection light reflected back by the finger, increasing the light receiving amount of the fingerprint detection light received by the optical sensing unit 5, and improving the light utilization rate of the fingerprint detection light. The second light concentrating structure 7 gathers the light emitted by the light emitting unit 4 to realize fast fingerprint identification and effectively improve the fingerprint identification effect.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The above is only the implementation mode of this application, and does not limit the scope of patents of this application. Any equivalent structure or equivalent process conversion made by using the contents of this application specification and drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present application in the same way.

Claims (10)

1. A display device having a fingerprint detection area, characterized in that the display device comprises: substrate, A light-emitting unit, arranged on the substrate, is used to emit visible light as excitation light for fingerprint identification; the excitation light is irradiated to the finger above the fingerprint detection area, so as to form a fingerprint carrying fingerprint information on the finger detect light; an optical sensing unit, disposed on the substrate, for receiving the fingerprint detection light to collect the fingerprint image of the finger; A first light concentrating structure and/or a second light concentrating structure, the first light concentrating structure is located on a side of the light emitting unit away from the substrate, and is used to condense the excitation light; the second light concentrating structure It is located on the side of the optical sensing unit away from the substrate, and is used for converging the fingerprint detection light. 2. The display device according to claim 1, further comprising: An encapsulation layer is disposed on a side of the light emitting unit and the optical sensing unit away from the substrate; the first light concentrating structure and/or the second light concentrating structure is disposed in the encapsulation layer. 3. The display device according to claim 2, wherein: The encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer stacked in sequence; the second inorganic layer is located on a side of the first inorganic layer away from the substrate; Wherein, the first light concentrating structure and/or the second light concentrating structure are located between the first inorganic layer and the organic layer. 4. The display device according to claim 3, further comprising: The pixel definition layer is defined to form a pixel opening, and part of the light emitting unit and the optical sensing unit are formed in the pixel opening; the first inorganic layer is provided on the side of the pixel definition layer away from the substrate , and forming a groove at a position corresponding to the pixel opening; The first light concentrating structure is located between the first inorganic layer and the organic layer, and part of the first light concentrating structure is embedded in the groove, and the rest of the first light concentrating structure covers the notch of the groove; and the orthographic projection of the first light concentrating structure on the substrate covers the orthographic projection of the light emitting unit on the substrate; and/or The second light concentrating structure is located between the first inorganic layer and the organic layer, and the entire second light concentrating structure is embedded in the groove. 5. The display device according to claim 2, further comprising: a pixel defining layer, defining and forming pixel openings; The encapsulation layer includes a first inorganic layer, a first organic layer, a second organic layer and a second inorganic layer stacked in sequence; the first organic layer is stacked on the side of the first inorganic layer away from the substrate a surface for planarizing the pixel opening; the second inorganic layer is stacked on the surface of the first inorganic layer facing away from the substrate; Wherein, the first light concentrating structure is located between the first organic layer and the second organic layer; Preferably, the orthographic projection of the first light concentrating structure on the substrate covers the orthographic projection of the light emitting unit on the substrate; Preferably, part of the light-emitting unit and the optical sensing unit is formed in the pixel opening; the first inorganic layer is provided on the surface of the pixel defining layer away from the substrate, and on the corresponding A groove is formed at the position of the pixel opening; The second light concentrating structure is located between the first inorganic layer and the first organic layer, and the entire second light concentrating structure is embedded in the groove. 6. The display device according to claim 1, further comprising: an encapsulation layer disposed on a side of the light emitting unit and the optical sensing unit away from the substrate; a protective layer disposed on a surface of the encapsulation layer facing away from the substrate; Wherein, the first light concentrating structure is arranged in the protective layer. 7. The display device according to claim 6, wherein: The protective layer includes a first protective layer, a functional layer, and a second protective layer stacked in sequence, wherein the functional layer protrudes from a position corresponding to the light-emitting unit toward a direction away from the substrate to form the first protective layer. A light concentrating structure; the position of the functional layer corresponding to the optical sensing unit protrudes toward the direction close to the substrate to form the second light concentrating structure. 8. The display device according to any one of claims 1-7, characterized in that, The light emitting unit and the optical sensing unit are arranged in the same layer. 9. The display device according to any one of claims 1-7, characterized in that, The material of the first light concentrating structure and the second light concentrating structure is quantum dots; and/or The refractive index of the first light concentrating structure is greater than the refractive index of other structures between the light emitting unit and the first light concentrating structure; the refractive index of the second light concentrating structure is greater than that of the second light concentrating structure The refractive index of other structures between the screen and the display; Preferably, the light emitting unit includes a green light emitting unit, and the quantum dots are green light quantum dots. 10. The display device according to any one of claims 1-7, characterized in that, The first light concentrating structure is a convex lens structure, and the second light concentrating structure is a concave lens structure.