WO2018152997A1 - Color wheel device, light source system and projection apparatus - Google Patents

Abstract

A color wheel device, a light source system, and a projection apparatus, wherein the color wheel device comprises a filter substrate (110, 120, 130, 140), a driving motor (610, 620, 630, 640), and a wavelength conversion element (210, 220, 230, 240) provided between the filter substrate (110, 120, 130, 140) and the driving motor (610, 620, 630, 640); the filter substrate (110, 120, 130, 140) and the wavelength conversion element (210, 220, 230, 240) are symmetric about an axis; the wavelength conversion element (210, 220, 230, 240) has at least one wavelength conversion region (211, 221, 231, 241); the wavelength conversion region (211, 221, 231, 241) receives exciting light to generate stimulated light; the filter substrate (110, 120, 130, 140) has at least one filter region (111, 121, 131, 141); the filter region (111, 121, 131, 141) is used for filtering the stimulated light; the position where the exciting light is incident to the wavelength conversion element (210, 220, 230, 240) and the position where the stimulated light is incident to the filter region (111, 121, 131, 141) are not symmetric with the axis; the driving motor (610, 620, 630, 640) is used for driving the filter substrate (110, 120, 130, 140) and the wavelength conversion element (210, 220, 230, 240), so that the wavelength conversion region (211, 221, 231, 241) and the filter region (111, 121, 131, 141) move synchronously. The color wheel device, the light source system, and the projection apparatus can improve the light utilization rate.

Description

 Color wheel device, light source system and projection device Technical field

The utility model relates to the technical field of display, in particular to a color wheel device, a light source system and a projection device.

Background technique

At present, the projection apparatus generates a laser beam by setting a color wheel device, and the laser light is excited by the excitation light to excite the phosphor on the color wheel device. Wherein, the color wheel device can be a monochrome wheel or a multi-color wheel. Generally, the monochrome wheel device is provided with a color-removing film for filtering specific wavelength excitation light and/or laser light, and the color-correcting film and the phosphor are synchronously corresponding to the filtered excitation light and/or The spectrum of the laser is a visible light spectrum.

technical problem

The existing color wheel device obtains a desired spectrum of laser light by attaching a color film on the color wheel substrate and setting a relative position of the color correction film and the phosphor on the color wheel substrate. As shown in Fig. 1, the excitation light from the light source 401' is incident on the phosphor 201' to generate a laser beam, which is finally emitted from the color correction film 501' after passing through the mirror group 301'. Wherein, the color correction film 501' and the substrate 101' are adhered by glue. Since the color correction film 501' is adhered to the substrate 101', glue remains, and the excitation light or the laser light is transmitted through the color correction film 501'. When the influence of the glue is caused, the excitation light and/or the laser transmittance are lowered, the light efficiency is not good, and the color wheel weight is increased by bonding the color correction film on the color wheel substrate, and the color wheel is rotated. Need to consume a lot of energy.

In order to overcome the problem that the excitation light and/or the transmittance of the laser light are lowered due to the glue, as shown in FIG. 2, the phosphor-coated wavelength conversion substrate 102' is used as a substrate on the wavelength conversion substrate 102. The filter element 202' is disposed outside the light source 402', and the light source 402' emits excitation light to the wavelength conversion substrate 102' to generate a laser beam, and the laser light is guided to the filter element 202' through the mirror group 302' for filtering. And finally exits from the homogenizing device 902'. However, in this solution, in order to ensure that the excitation light energy of the light source 402' is completely incident on the wavelength conversion substrate 102', the wavelength conversion substrate 102' must be made sufficiently large, and the color wheel device shown in FIG. The filter element 202' is attached to the outer edge of the wavelength conversion substrate 102', which results in an increase in the volume of the entire color wheel device.

Technical solution

The main purpose of the utility model is to propose a color wheel device, a light source system and a projection device, which aim to improve the light efficiency utilization of the color wheel device.

In order to achieve the above object, a color wheel device according to the present invention includes a filter substrate, a driving motor, and a wavelength conversion element disposed on the filter substrate, wherein the filter substrate and the wavelength conversion element are axially symmetric. The wavelength conversion element has at least one wavelength conversion region, the wavelength conversion region receives excitation light to generate a laser beam; the filter substrate has at least one filter region, and the filter region is configured to perform the laser beam Filtering; a position at which the excitation light is incident on the wavelength conversion region is asymmetric with a position at which the laser light is incident on the filter region; and the drive motor is configured to drive the filter substrate and the substrate The wavelength conversion element is configured to move the wavelength conversion region in synchronization with the filter region.

Preferably, the wavelength conversion region and the filter region are disposed at 180 degrees with respect to an axis of the filter substrate, and a spot formed by the excitation light on the wavelength conversion region and the laser receiving light are The spot formed on the filter region is disposed at 180 degrees with respect to the axis of the filter substrate.

Preferably, the filter substrate is arranged in a circle, and the filter region is arranged in a circular or fan shape.

Preferably, the wavelength conversion element is arranged in a circular shape.

Preferably, the wavelength conversion element is disposed on a first surface, a second surface of the filter substrate or an outer circumference of the filter substrate, and the first surface and the second surface are the filter Two surfaces disposed on the substrate opposite each other.

Preferably, the wavelength conversion element is provided with a heat dissipating component for discharging heat away from the excitation light side.

Preferably, the heat dissipating component is disposed on an outer edge of the filter substrate.

Preferably, the wavelength conversion region is configured to reflect the laser light receiving direction such that an exit direction of the laser light receiving region from the wavelength conversion region is opposite to an incident direction of the excitation light.

Preferably, the wavelength conversion region is disposed to transmit the laser light to cause an emission direction of the laser light receiving from the wavelength conversion region to coincide with an incident direction of the excitation light.

The present invention also provides a light source system comprising at least one light source and a color wheel device, wherein the excitation light emitted by the at least one light source is incident on a wavelength conversion element of the color wheel device.

The utility model also provides a projection device, comprising a light source system, the light source system comprising at least one light source and a color wheel device, the color wheel device comprising a filter substrate and a wavelength conversion component disposed on the filter substrate, The wavelength conversion element has at least one wavelength conversion region for receiving excitation light to generate a laser beam; the filter substrate has at least one filter region for filtering the laser light.

Beneficial effect

The color wheel device of the present invention has a filter substrate disposed on the color wheel, and a wavelength conversion element is disposed on the filter substrate, and the wavelength conversion element is configured to receive a laser to generate a laser beam. The filter substrate has at least one filter region for filtering the laser light, and the filter region is in synchronous relationship with the wavelength conversion element disposed on the filter substrate. The filter substrate can be mounted on a fixing material such as glass without using a color-correcting film, thereby reducing the bonding process between the color-removing film and the substrate, and is not received when the excitation light or the laser light is transmitted through the filter region. The glue effect of the decorative color film is improved, thereby improving the light efficiency utilization. At the same time, the wavelength conversion element is disposed on the first surface, the second surface of the filter substrate or on the outer circumference of the filter substrate, and the first surface and the second surface are the filter The two surfaces of the light substrate are disposed opposite each other, so that the entire light source is more compact to achieve the purpose of reducing the volume.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely some embodiments of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is a schematic structural view of an embodiment of a conventional color wheel device;

2 is a schematic structural view of another embodiment of a conventional color wheel device;

3 is a schematic structural view of a first embodiment of a color wheel device of the present invention;

Figure 4 is a front elevational view of the filter substrate and wavelength conversion element of Figure 3;

Figure 5 is a schematic structural view of a second embodiment of the color wheel device of the present invention;

Figure 6 is a schematic structural view of a third embodiment of the color wheel device of the present invention;

Figure 7 is a schematic view showing the structure of a fourth embodiment of the color wheel device of the present invention.

Description of the reference numerals:

 Label  name  101'  Substrate  102'  Wavelength conversion substrate  110, 120, 130, 140  Filter substrate  111, 121, 131, 141  Filter zone  201'  Phosphor  202'  Filter element  210, 220, 230, 240  Wavelength conversion element  211, 221, 231, 241  Wavelength conversion region  301', 302', 310, 320, 330, 340  Mirror group  401', 402', 410, 420, 430, 440  light source  501'  Color correction diaphragm  530  Heat sink  610, 620, 630, 640  Drive motor  902'  Homogenizer

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present invention, the directional indication is only used to explain in a certain posture (such as the drawing) The relative positional relationship between the components below, the motion situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is used for the purpose of description only, and is not to be understood as an indication or Implied its relative importance or implicitly indicates the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

The utility model provides a color wheel device.

In the first embodiment of the present invention, referring to FIG. 3, the solid line with an arrow in the figure indicates a plane or a space such as a face, a cavity, a hole, or the like. The color wheel device includes a filter substrate 110, a driving motor 610, and a wavelength conversion element 210 disposed on the filter substrate 110. The wavelength conversion element 210 has at least one wavelength conversion region 211, and the wavelength conversion region 211 receives excitation light generation and reception. The laser substrate 110 has at least one filter region 111 for filtering the laser light, and the driving motor 610 is for driving the filter substrate 110 and the wavelength conversion element 210 to make the wavelength conversion region 211 and The filter area 111 moves in synchronization. The filter substrate 110 is axially symmetric with the wavelength conversion element 210, and the wavelength conversion element 210 has at least one wavelength conversion region, the wavelength conversion region receives excitation light to generate a laser beam; the filter substrate 110 has At least one filter region for filtering the laser light; a position at which the excitation light is incident on the wavelength conversion region and a position at which the laser light is incident on the filter region Axis is asymmetrical. In the present embodiment, the drive motor 610 is disposed at the axial center position.

Specifically, as shown in FIG. 3, in the embodiment of the present invention, the color wheel device includes a filter substrate 110, and the filter substrate 110 is provided with a wavelength conversion element 210 for receiving excitation light to generate a laser beam, in order to obtain an ideal one. The wavelength conversion component 210 has at least one wavelength conversion region 211. In this embodiment, the wavelength conversion component 210 can be three wavelength conversion regions 211, and the three wavelength conversion regions 211 are respectively excited to have red, green, and blue colors. The laser of the three primary color spectrum. Of course, the wavelength conversion region 211 can also be set to one or more. The filter substrate 110 has at least one filter region 111 for filtering the laser light. Of course, the filter area 111 can also be set to multiple, and can be respectively set corresponding to the three wavelength conversion areas 211 of red, green, and blue, so that the filter area 111 and the three wavelength conversion areas 211 have a synchronous correspondence relationship. The synchronous correspondence relationship described herein means that when the incident light excites a certain wavelength conversion region 211, the laser light generated by the wavelength conversion region 211 is guided to the corresponding filter region 111 by the mirror group 310 for filtering. Get the ideal spectrum. It should be clarified that the filter region 111 is not equidistant from the axis of the wavelength conversion element 210 to the filter substrate 110, and the mirror group 310 is based on the specific position of the wavelength conversion element 210 and the filter region 111 on the filter substrate 110. set up. In order to obtain the periodic mixed outgoing light, the drive motor 610 is driven to drive the filter substrate 110 to drive the wavelength conversion element 210 to synchronously move, so that the color wheel can generate 360 degrees of continuous outgoing light. The filter region 111 may be directly plated on the filter substrate 110 by a coating process. At the same time, since the filter substrate 110 of the present invention can be mounted on a fixing material such as glass without using a color-correcting film, the bonding process between the color-removing film and the substrate is reduced, and when the light is excited or filtered by the laser. When the light region 111 is transmitted, it is not affected by the glue attached to the decorative film, thereby improving the light efficiency utilization.

Referring to FIG. 4, in the first embodiment, in order to facilitate the alignment of the mirror group 310 on the color wheel device, the wavelength conversion region 211 and the filter region 111 are disposed at 180 degrees with respect to the axis of the filter substrate 110. Thereby, the incident point of the excitation light on the wavelength conversion region 211 corresponds to the exit point of the filter region 111, and the incident point and the exit point are collinear with the axis of the color wheel, and the mirror group 310 can be set according to the straight line of the collinear line. Thus, the mirror set 310 facilitates alignment with the assembly angle when assembled with the color wheel device. When the excitation light is incident on the wavelength conversion region 211, the spot formed by the excitation light and the spot formed by the laser light generated on the filter region 111 generated by the wavelength conversion region 211 are disposed at 180 degrees with respect to the axis of the filter substrate 110. To obtain an accurate synchronization correspondence. In this embodiment, the filter substrate 110 is disposed in a circular shape, and the circular filter substrate 110 can more fully utilize the internal volume of the color wheel device. In other embodiments, in order to consider better heat dissipation, the filter substrate 110 may also be disposed in an annular shape, and the annular filter substrate 110 and the drive motor 610 are connected in a nested manner. Correspondingly, the filter region 111 of the filter substrate 110 can also be arranged in a circular or fan shape. The filter substrate 110 has a first surface and a second surface. The first surface and the second surface are two surfaces disposed on the filter substrate opposite to each other, wherein the first surface is a surface away from the driving motor, and the second surface is a filter. The surface of the optical substrate 110 for fixing the driving motor 610 may be disposed on the first surface, the second surface of the filter substrate 110 or the outer periphery of the filter substrate 110. For details, see the following embodiments and Figure.

Referring to FIG. 3, in the first embodiment, in order to better dissipate the wavelength conversion region 211, the light source 410 is disposed on a side of the substrate 110 away from the driving motor 610 for emitting excitation light. The wavelength conversion element 210 is disposed at a position away from the axial center of the filter substrate 110, and receives excitation light to generate a laser beam, so that the wavelength conversion element 210 is located outside the filter substrate, which is relatively easy to dissipate heat. In order to make the hybrid laser uniform, the wavelength conversion element 210 is axially symmetric. The axis described herein refers to the axis of the rotation axis of the filter substrate 110, and the wavelength conversion element 210 filters according to the number of the filter portions. The axis of the substrate 110 is axially symmetrical, so that the wavelength of the wavelength conversion region 211 having different colors can be equivalent to the laser light, so that the chromatogram of the hybrid laser is relatively uniform. In this embodiment, the wavelength conversion element 210 is disposed in a circular shape to generate a relatively continuous laser beam. The filter region 111 is disposed in a circular shape near the axis of the filter substrate 110, and the wavelength conversion element 210 is arranged in a circular shape. It can make the laser more uniform. The wavelength conversion element 210 is disposed on the first surface of the filter substrate 110, and is transmitted by the laser light guided by the mirror group 310 to the filter region 111 for filtering the laser light.

Referring to FIG. 5, in the second embodiment, the light source 420 is disposed on a side of the substrate 120 remote from the driving motor 620 for emitting excitation light. The wavelength conversion element 220 is disposed at a position away from the axial center of the filter substrate 120 for receiving excitation light to generate a laser beam, and the wavelength conversion element 220 is axially symmetric. At the same time, the wavelength conversion element 220 is disposed in a circular shape, and the wavelength conversion element 220 is disposed on the second surface of the filter substrate 120. The filter region 121 is disposed in a circular shape near the axis of the filter substrate 120, and is transmitted by the laser light guided by the mirror group 320 to the filter region 121 for filtering the laser light. The driving motor 620 is connected to the axis of the filter substrate 120 for driving the filter substrate 120 and the wavelength conversion element 220 to move the wavelength conversion region 221 and the filter region 121 in synchronization.

Referring to FIG. 6, in the third embodiment, the light source 430 is disposed on a side of the substrate 130 away from the driving motor 630 for emitting excitation light. The wavelength conversion element 230 is disposed away from the axial center of the filter substrate 130 for receiving excitation light to generate a laser beam, and the wavelength conversion element 230 is axially symmetric. At the same time, the wavelength conversion element 230 is disposed in a circular shape, the wavelength conversion element 230 is disposed on the outer circumference of the filter substrate 130, and the filter region 131 is disposed in a circular shape near the axis of the filter substrate 130, and is guided by the laser through the mirror group 330. Transmission occurs after the filter region 131 for filtering the laser light. The driving motor 630 is connected to the axis of the filter substrate 130 for driving the filter substrate 130 and the wavelength conversion element 230 to move the wavelength conversion region 231 and the filter region 131 in synchronization.

In order to further enable the wavelength conversion element 230 to dissipate heat better, as shown in FIG. 6, in the third embodiment, the surface of the wavelength conversion element 230 facing away from the incident surface of the excitation light is provided with a heat dissipation component 530 for discharging heat. The arrangement of the wavelength conversion component 230 can be disposed on the filter substrate 130 through the heat dissipation component 530. The heat dissipation component 530 can be disposed outside the circumference of the filter substrate 130, or can be stacked on the filter substrate 130. The inside of the circumference of the filter substrate 130 or the like. The heat dissipating component 530 can be configured to cause the wavelength conversion component 230 to discharge the internal heat through the heat dissipation component 530 in the process of absorbing the excitation light energy, and the heat dissipation component 530 can be disposed on the outer circumference of the filter substrate 130. An annular body disposed around the axis of the filter substrate 130, or a portion or all of the heat dissipation assembly 530 is overlapped with the filter substrate 130 to form an annular body disposed around the axis of the filter substrate 130. The heat dissipating component 530 may be an integral annular body or a plurality of component components disposed separately. For example, the heat dissipating component 530 includes a plurality of curved portions, and the plurality of curved portions are spliced into each other to form an annular heat dissipating component 530. The heat dissipating component 530 can be a heat dissipating fin, a heat dissipating column, a heat dissipating rib, etc., and a person skilled in the art can obtain a corresponding technical solution by using the embodiment and the drawing of the present invention, which will not be described in detail herein. In a preferred embodiment, the heat dissipation component 530 is disposed at the outer edge of the filter substrate 130 to increase the heat dissipation area of the wavelength conversion component 230. Meanwhile, the heat dissipation component 530 can bring the wavelength conversion region 231 of the wavelength conversion component 230 closer. The outer side of the filter substrate 130 further facilitates heat discharge from the wavelength conversion region 231.

Referring to FIG. 6, in the third embodiment, the wavelength conversion region 231 is disposed to reflect the laser light, and the purpose of the arrangement is to position the light source 430 and the mirror group 330 on the same side of the filter substrate 130. In this embodiment, the light source 430 and the mirror group 330 are located on a side of the driving motor 630 opposite to the filter substrate, and the light source 430 emits excitation light, and the excitation light passes through the lens and enters the wavelength conversion element 230, and reflects the laser light, and receives the laser light. The reflection of the lens through the mirror group 330 enters the corresponding filter region 131 of the filter substrate 130. The reflector can be reflected by the laser in the wavelength conversion region 231 so that the direction of the laser light from the wavelength conversion region 231 is opposite to the incident direction of the excitation light with respect to the wavelength conversion region 231, which is advantageous in that the color wheel device can be made The structure is more compact.

Referring to FIG. 7, in the fourth embodiment, the wavelength conversion region 241 is disposed to transmit laser light, and the purpose of the arrangement is to cause the light source 440 and the mirror group 340 to be respectively located on both sides of the filter substrate 140. In this embodiment, the light source 440 is located on the same side of the driving motor 640 to emit excitation light. After the excitation light passes through the wavelength conversion element 240, it is reflected by the lens and the mirror group 340 and enters the corresponding filter region 141 of the filter substrate 140, and then exits. The direction in which the laser light is emitted from the wavelength conversion region 241 is coincident with the incident direction of the excitation light with respect to the wavelength conversion region 241, and the design is advantageous in that the number of times the optical path passes through the lens can be reduced, thereby further improving the light efficiency utilization.

The wavelength conversion element is disposed on the first surface, the second surface of the filter substrate or on an outer circumference of the filter substrate, and the first surface and the second surface are mutually on the filter substrate The two surfaces are placed facing away, so that the entire light source is more compact to achieve the purpose of reducing the volume.

The present invention further provides a light source system, the light source system comprising at least one light source and a color wheel device, the light source may be a laser light source, and the light exiting direction of the at least one light source is opposite to the wavelength conversion component of the color wheel device to make the incident The light illuminating wavelength conversion element generates a laser light. The color wheel device comprises a filter substrate and a wavelength conversion element disposed on the filter substrate, the wavelength conversion element has at least one wavelength conversion region, the wavelength conversion region is configured to receive excitation light to generate a laser beam, and the filter substrate has at least one pair A filter area that is filtered by a laser. Since the position of the filter region on the filter substrate is very fixed, the filtering effect of the light emitted by the light source system is improved. At the same time, since the filter substrate of the present invention can be attached to the color filter film, the bonding process between the color correction film and the substrate is reduced, and when the excitation light or the laser light is transmitted through the filter region, it is not stuck. The glue effect of the decorative color film is improved, thereby improving the light efficiency utilization. The wavelength conversion element is disposed on the first surface, the second surface of the filter substrate or on an outer circumference of the filter substrate, and the first surface and the second surface are mutually on the filter substrate The two surfaces are placed facing away, so that the entire light source is more compact to achieve the purpose of reducing the volume.

The present invention also provides a projection device, which includes the foregoing color wheel device. It should be noted that since the present projection device adopts all the technical solutions of all the above embodiments, it also has the technical solution of the above embodiment. All the beneficial effects will not be repeated here.

The above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structural transformation made by the specification and the drawings of the present invention under the inventive concept of the present invention, or Direct/indirect use in other related technical fields is included in the scope of patent protection of the present invention.

Claims (11)

A color wheel device, comprising: a filter substrate and a wavelength conversion element disposed on the filter substrate, the filter substrate being axially symmetric with the wavelength conversion element, the wavelength conversion The element has at least one wavelength conversion region that receives excitation light to generate a laser beam; the filter substrate has at least one filter region for filtering the laser light; a position at which the excitation light is incident on the wavelength conversion region and a position at which the laser light is incident on the filter region is asymmetric with respect to the axis; a driving motor for driving the filter substrate and the wavelength conversion element to move the wavelength conversion region in synchronization with the filter region. The color wheel device according to claim 1, wherein the wavelength conversion region and the filter region are disposed at 180 degrees with respect to an axis of the filter substrate, and the excitation light is at the wavelength The spot formed on the conversion region and the spot formed by the laser light on the filter region are disposed at 180 degrees with respect to the axis of the filter substrate. The color wheel device according to claim 2, wherein the filter substrate is disposed in a circular shape, and the filter region is disposed in a circular or fan shape. 4. A color wheel device according to claim 1 wherein said wavelength converting element is arranged in a circular shape. The color wheel device according to claim 4, wherein the wavelength conversion element is disposed on a first surface, a second surface of the filter substrate, or an outer circumference of the filter substrate, The first surface and the second surface are two surfaces disposed on the filter substrate opposite to each other. A color wheel device according to claim 5, wherein said wavelength conversion element is provided with a heat dissipating member for discharging heat away from said excitation light side. The color wheel device according to claim 6, wherein the heat dissipating component is disposed at an outer edge of the filter substrate. A color wheel device according to any one of claims 1 to 7, wherein said wavelength conversion region is arranged to reflect said laser light to cause said laser light to be emitted from said wavelength conversion region The direction is opposite to the incident direction of the excitation light. The color wheel device according to any one of claims 1 to 7, wherein the wavelength conversion region is arranged to transmit the laser light to cause the laser light to be emitted from the wavelength conversion region The direction coincides with the incident direction of the excitation light. A light source system, comprising: at least one light source and the color wheel device according to any one of claims 1 to 9, wherein excitation light emitted by the at least one light source is incident on the color The wavelength conversion element of the wheel device is arranged. A projection apparatus comprising the light source system of claim 10.