Display unit and projection device

Abstract

To provide a display unit and a projection device.SOLUTION: A display unit includes a first display panel, a wavelength conversion element, a second display panel, and a light combining element. The first display panel has a plurality of first light emitting elements and is used for providing first color light. The wavelength conversion element is located on a transmission path of the first color light and has a conversion region and a non-conversion region. A quantum dot conversion material is disposed on the conversion region, part of the first color light is converted into a third color light after passing through the conversion region, and another part of the first color light passes through the non-conversion region. The second display panel has a plurality of second light emitting elements and is used for providing second color light. The light combining element is located on transmission paths of the first color light, the second color light, and the third color light, and is used for forming an image beam.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an optical unit and an optical device, and particularly to a display unit and a projection device in which the display unit is installed.

Background Art

[0002] Generally speaking, a projection device that emits three primary colors and employs DLP (Digital Light Processing) and LCoS (Liquid Crystal On Silicone) requires a solid light source such as a light-emitting diode (LED) or a laser diode to provide illumination and form a projection light beam in accordance with the design of the optical system. However, the projection device formed in this way has a rather large volume, which is disadvantageous for the production of a micro-type projection device.

[0003] Conventionally, there has been a projection device formed by a display and a light mixing system using a plurality of micro light-emitting diodes (Micro-LEDs) as a light source, which has the advantage of a small volume. However, when the distance between micro light-emitting diodes is less than 5 micrometers (μm), it is necessary to transfer and bond a large number of micro light-emitting diode chips to a driving backplane. Also, when trying to form a full-color panel, it is necessary to transfer a large number of micro light-emitting diode chips multiple times, and the manufacturing process is quite difficult. Therefore, at present, a single-sheet type full-color micro light-emitting diode display panel has not yet emerged on the market.

[0004] In addition, when forming a micro projection device by adopting a three-sheet type micro light-emitting diode display panel and an X-ray mixing prism system, since the light beam provided by the micro light-emitting diode has a large emission angle, dealing with the problems of light leakage and alignment of light of different colors also becomes complicated accordingly. Even if the emission angle of the light beam provided by the micro light-emitting diode is reduced by using a reflection cover or a micro lens array, when the distance between the micro light-emitting diodes is less than 5 micrometers, the minimum limit of its emission half angle is also about 20 degrees. Thus, when mixing light from different micro light-emitting diode display panels, total reflection may occur for some light beams in the X-ray mixing prism system, so invalid light is introduced into the subsequent optical system, resulting in stray light and possibly affecting the contrast of the video screen.

[0005] It should be noted that this "background technology" part is only for helping to understand the content of the present invention. Therefore, the content disclosed in this "background technology" part may include technologies not known to those skilled in the art. Thus, the content disclosed in this "background technology" part does not mean that the content, or the problems to be solved by one or more embodiments of the present invention, were already well known to those skilled in the art before the filing of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a display unit and a projection device having the advantages of small volume and good screen quality.

[0007] Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

Means for Solving the Problems

[0008] To achieve one or some or all of the above objectives or other objectives, according to an embodiment of the present invention, a display unit is provided. The display unit includes a first display panel, a wavelength conversion element, a second display panel, and a light mixing element. The first display panel has a plurality of first light-emitting elements, and these first light-emitting elements are used to provide light of a first color. The wavelength conversion element is located in the propagation path of the light of the first color and has a conversion region and a non-conversion region. Among them, a quantum dot conversion material is installed in the conversion region. After a part of the light of the first color passes through the conversion region, it is converted into light of a third color, and the other part of the light of the first color passes through the non-conversion region. The second display panel has a plurality of second light-emitting elements, and these second light-emitting elements are used to provide light of a second color. The light mixing element is located in the propagation paths of the light of the first color, the light of the second color, and the light of the third color, and is used to guide the light of the third color, the light of the second color, and the light of the first color passing through the non-conversion region to form an image light beam.

[0009] To achieve one or some or all of the above objectives or other objectives, according to an embodiment of the present invention, a projection device is provided. The projection device includes a display unit and a projection lens. The projection lens is located in the propagation path of the image light beam and is used to emit the image light beam from the projection device.

[0010] As described above, the embodiments of the present invention have at least the following advantages or effects. That is, in the embodiments of the present invention, due to the arrangement of the first display panel and the second display panel of the display unit, there is no need to provide an X prism light mixing system, and only a single-piece spectroscope (beam splitter) can be installed. Therefore, it has the advantages of a simple architecture and a small volume. When total reflection of color light from different micro light-emitting diode display panels occurs, the possibility of stray light generation can be reduced because invalid light is introduced into the subsequent optical system. Also, due to the arrangement of the first display panel and the second display panel of the display unit, the projection device has the advantages of a simple architecture and a small volume, can reduce the number of color lights that require alignment, and can lower the possibility of stray light generation in the system. In this way, the contrast of the video screen and the video quality can be further improved.

[0011] In order to make the above features and advantages of the present invention more obvious, the following will be described in detail by way of examples with reference to the accompanying drawings.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 2D

Figure 3

Best Mode for Carrying Out the Invention

[0013] The above-mentioned and other technical contents, features, functions and effects of the present invention will become clear from the following detailed description of preferred embodiments based on the attached drawings. Note that terms regarding directions mentioned in the following embodiments, such as up, down, left, right, front, back, etc. are only the directions of the attached drawings. Therefore, the terms of directions used are only for explaining the present invention and not for limiting the present invention.

[0014] FIG. 1 is a diagram showing the architecture of a projection device according to an embodiment of the present invention. As shown in FIG. 1, the projection device 200 includes a display unit 100 and a projection lens 210. The display unit 100 is used to provide an image light beam, and the projection lens 210 is located in the propagation path of the image light beam and is used to project the image light beam outside the projection device 200. For example, in this embodiment, the projection lens 210 includes, for example, a combination of one or more optical lenses having refractive power, and includes various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, convex-concave lenses, concave-convex lenses, plano-convex lenses, plano-concave lenses, etc. In one embodiment, the projection lens 210 may include a planar optical lens to project the image light beam from the display unit 100 to a projection target, such as a screen or a wall surface, in a reflection or transmission (pass-through) manner. Note that the present invention does not limit the form and type of the projection lens 210.

[0015] In another aspect, as shown in FIG. 1, in this embodiment, the display unit 100 includes a first display panel 110, a wavelength conversion element 120, a second display panel 130, and a light mixing element 140. Specifically, the first display panel 110 has a plurality of first light emitting elements 111 and can be used to provide light L1 of a first color. The second display panel 130 has a plurality of second light emitting elements 131 and can be used to provide light L2 of a second color. For example, the first display panel 110 and the second display panel 130 are micro light emitting diode display panels, and the first light emitting elements 111 and the second light emitting elements 131 are a blue light micro light emitting diode and a red light micro light emitting diode, respectively, and can be used to provide blue light and red light, respectively.

[0016] Also, as shown in FIG. 1, the wavelength conversion element 120 is located in the propagation path of the light L1 of the first color and is installed between the light mixing element 140 and the first display panel 110. The wavelength conversion element 120 has a conversion region QR and a non-conversion region NR. Among them, a quantum dot conversion material QD is installed in the conversion region QR, which can be used to convert the light L1 of the first color into light of another color. As shown in FIG. 1, in this embodiment, after a part of the light L1 of the first color passes through the conversion region QR, it is converted into light L3 of a third color, and another part of the light L1 of the first color passes through the non-conversion region NR without the quantum dot conversion material QD. After passing through the non-conversion region NR, this part of the light L1 of the first color is still the light L1 of the first color. For example, in this embodiment, the quantum dot conversion material QD is a quantum dot conversion material QD that generates green light and can convert blue light into green light. That is, in this embodiment, the light L1 of the first color is blue light, the light L2 of the second color is red light, and the light L3 of the third color is green light.

[0017] Furthermore, the light mixing element 140 is located in the propagation paths of the light L1 of the first color, the light L2 of the second color, and the light L3 of the third color. The light mixing element 140 may be an element that allows some light to pass through and reflects some light, a dichroic mirror, a polarization beam splitter element, or various other elements that can separate light beams. For example, in this embodiment, the light mixing element 140 can reflect red light and allow blue light and green light to pass through. In other words, the light mixing element 140 can reflect the light L2 of the second color and allow the light L1 of the first color and the light L3 of the third color to pass through. In this way, the light L1 of the first color and the light L3 of the third color from the first display panel 110 can pass through the light mixing element 140, the light L2 of the second color from the second display panel 130 can be reflected by the light mixing element 140, and under the guidance of the light mixing element 140, the light mixing of the light L1 of the first color, the light L2 of the second color, and the light L3 of the third color can be performed to form an image light beam.

[0018] Also, as shown in FIG. 1, in this embodiment, the projection lens 210 is placed on the side opposite to the first display panel 110, whereby the image light beam can enter the projection lens 210. Since the image light beam is formed by the light L1 of the first color, the light L2 of the second color, and the light L3 of the third color of different colors, the image light beam controls the on and off of the unit pixels of the first display panel 110 and the second display panel 130 to adjust the color of the unit pixels of the display unit 100, so that the image screen formed by the image light beam emitted by the projection lens 210 can be a color screen.

[0019] In this way, due to the arrangement of the first display panel 110 and the second display panel 130 of the display unit 100, there is no need to install an X prism light mixing system, and only a single-piece spectroscope can be arranged. Therefore, it has the advantages of a simple architecture and a small volume. When total internal reflection of color light from different micro light-emitting diode display panels occurs, the possibility of ineffective light being introduced into the subsequent optical system and causing stray light can be reduced. Also, due to the arrangement of the first display panel 110 and the second display panel 130 of the display unit 100, the projection device 200 has the advantages of a simple architecture and a small volume, can reduce the number of color lights that require alignment, and can lower the possibility of stray light occurring in the system. Thereby, the contrast of the video screen and the video quality can be further improved.

[0020] Hereinafter, based on FIGS. 2A to 2D, various correspondence relationships between the unit pixels of the display unit 100 and the unit pixels of the first display panel 110 and the second display panel 130 will be further described.

[0021] FIGS. 2A to 2D are diagrams showing various correspondence relationships between the unit pixels of the display unit in FIG. 1 and the unit pixels of the first display panel and the second display panel. In this embodiment, as shown in FIGS. 1, 2A to 2D, the first display panel 110 has a plurality of first pixel regions PX1, the first pixel region PX1 is a unit pixel of the first display panel 110, each first light-emitting element 111 is installed in the first pixel region PX1 respectively, the non-conversion region NR corresponds to the first part PR1 of these first pixel regions PX1, and the conversion region QR corresponds to the second part PR2 of these first pixel regions PX1. On the other hand, the second display panel 130 has a plurality of second pixel regions PX2, the second pixel region PX2 is a unit pixel of the second display panel 130, and each second light-emitting element 131 is installed corresponding to each second pixel region PX2.

[0022] In addition, in this embodiment, each second pixel region PX2 and each first pixel region PX1 may have a one-to-many correspondence (as shown in FIGS. 2A and 2B), or each second pixel region PX2 and each first pixel region PX1 may have a one-to-one correspondence (as shown in FIGS. 2C and 2D). For example, as shown in FIGS. 2A and 2B, one second pixel region PX2 of the second display panel 130 corresponds to four first pixel regions PX1 of the first display panel 110. That is, in the embodiments of FIGS. 2A and 2B, the resolution of the first display panel 110 is larger than that of the second display panel 130. Thus, the light beam provided by the display pixel region as the unit pixel in the display unit 100 can be formed by the second-color light L2 provided by one second pixel region PX2 of the second display panel 130, and the first-color light L1 and the third-color light L3 provided by the four first pixel regions PX1 of the first display panel 110. In this way, each display pixel region of the display unit 100 and each second pixel region PX2 have a one-to-one correspondence.

[0023] In addition, in this embodiment, the number of the first portions PR1 of the first pixel regions PX1 of the first display panel 110 is less than or equal to the number of the second portions PR2 of the first pixel regions PX1 of the first display panel 110. As shown in FIG. 2A, the ratio of the number of the first portions PR1 of the first pixel region PX1 to the number of the second portions PR2 of the first pixel region PX1 is 1:1, or as shown in FIG. 2B, the ratio of the number of the first portions PR1 of the first pixel region PX1 to the number of the second portions PR2 of the first pixel region PX1 is 1:3. Thus, the ratio of the first-color light L1 in each display pixel region of the display unit 100 may be less than or equal to the ratio of the third-color light L3. On the other hand, since the second pixel region PX2 of the second display panel 130 is larger than the first pixel region PX1 of the first display panel 110, the ratio of the second-color light L2 in each display pixel region of the display unit 100 is larger than the ratio of the first-color light L1 or the third-color light L3. In this way, in this embodiment, among the white light formed by the display unit 100, the ratio of the red light is larger than the ratio of the blue light or the green light, so that the red representation of the projection screen of the projection device 200 is improved, and the needs of the models of the projection device 200 with relatively high requirements for the color representation of the screen can be met.

[0024] On the other hand, as shown in FIGS. 2C and 2D, each second pixel region PX2 of the second display panel 130 corresponds to each first pixel region PX1 of the first display panel 110 and has a one-to-one correspondence relationship. That is, in the embodiments of FIGS. 2A and 2B, the resolution of the first display panel 110 is equal to that of the second display panel 130. However, in this case, the light beam provided by the display pixel region as the unit pixel in the display unit 100 can be formed by the second-color light L2 provided by the four second pixel regions PX2 of the second display panel 130, and the first-color light L1 and the third-color light L3 provided by the four first pixel regions PX1 of the first display panel 110. Thus, both the first pixel region PX1 and the second pixel region PX2 have the same many-to-one correspondence relationship for each display pixel region. In other words, the resolution of the display unit 100 is larger than the resolution of the first display panel 110 or the second display panel 130.

[0025] Also, similar to the embodiments of FIGS. 2A and 2B, in the embodiments of FIGS. 2C and 2D, the number of the first portions PR1 of the first pixel regions PX1 of the first display panel 110 is also less than or equal to the number of the second portions PR2 of the first pixel regions PX1 of the first display panel 110. Thus, the ratio of the second-color light L2 in each display pixel region of the display unit 100 is also larger than the ratio of the first-color light L1 or the third-color light L3. Thus, in this embodiment, among the white light formed by the display unit 100, the ratio of the red light is larger than the ratio of the blue light or the green light. Therefore, the red representation of the projection screen of the projection device 200 can be improved, and the needs of the models of the projection device 200 with relatively high requirements for the color representation of the screen can be satisfied.

[0026] Referring also to FIGS. 1 and 2A, in this embodiment, the display unit 100 may further include a light condensing element 150. The light condensing element 150 is installed in the propagation paths of the wavelength conversion element 120 and the light L2 of the second color. Among them, the light condensing element 150 has a plurality of first light condensing units 151, a plurality of second light condensing units 152, and a plurality of third light condensing units 153. For example, the light condensing element 150 is an array lens, and the first light condensing unit 151, the plurality of second light condensing units 152, and the plurality of third light condensing units 153 are different microlens units, respectively, and their optically effective surfaces have different curvatures. Each of these first light condensing units 151 is installed corresponding to each of the first portions PR1 of these first pixel regions PX1, each second light condensing unit 152 is installed corresponding to each of the second portions PR2 of these first pixel regions PX1, and each of the plurality of third light condensing units 153 is installed corresponding to each of these second pixel regions PX2. In this way, by installing the first light condensing unit 151, the plurality of second light condensing units 152, and the plurality of third light condensing units 153, the emission angles of the light L1 of the first color, the light L2 of the second color, and the light L3 of the third color are further reduced, and by making the emission angles of the light L1 of the first color, the light L2 of the second color, and the light L3 of the third color equal, the optical efficiency of the display unit 100 can be further improved.

[0027] In this embodiment, the first-color light L1 is blue light, the second-color light L2 is red light, and the third-color light L3 is green light. However, the present invention is not limited thereto. In another embodiment, the first-color light L1 may be blue light, the second-color light L2 may be green light, and the third-color light L3 may be red light. That is, the second light-emitting element 131 may be a green light micro light-emitting diode, and the quantum dot conversion material QD may be a quantum dot conversion material QD that generates red light. In this way, by controlling the on or off of the unit pixels of the first display panel 110 and the second display panel 130 to adjust the color of the unit pixels of the display unit 100, the video screen projected by the projection lens 210 can also be made into a color screen. Further, in this embodiment, among the white light formed by the display unit 100, the ratio of the green light is larger than the ratio of the blue light or the red light, and the ratio of the red light is equal to or greater than the ratio of the blue light. Therefore, the brightness of the projection screen of the projection device 200 can be improved, and the expression of red color on the projection screen of the projection device 200 can also be improved. Thus, the needs of the models of the projection device 200 with relatively high requirements for the screen brightness can be satisfied.

[0028] FIG. 3 is a diagram showing the architecture of a projection device according to another embodiment of the present invention. As shown in FIG. 3, the display unit 300 in FIG. 3 is similar to the display unit 100 in FIG. 1, but the differences between the two are as follows. Specifically, as shown in FIG. 3, in this embodiment, the light mixing element 340 of the display unit 300 can, for example, reflect blue light and green light and allow red light to pass through. In other words, the light mixing element 340 can form a video light beam by reflecting the first-color light L1 and the third-color light L3 and allowing the second-color light L2 to pass through. Further, the projection lens 210 is disposed on the side opposite to the second display panel 130. In this way, the video light beam can still enter the projection lens 210 after passing through the light mixing element 340. In this embodiment, since the display unit 300 has a structure similar to that of the display unit 100, the projection device 200 can be provided with similar effects and advantages, but the detailed description thereof is omitted here.

[0029] From the above, the embodiments of the present invention have at least the following advantages or effects. In the embodiments of the present invention, due to the arrangement of the first display panel and the second display panel of the display unit, there is no need to provide an X prism light mixing system, and only a single-piece spectroscope can be installed. Therefore, it has the advantages of a simple architecture and a small volume. When total internal reflection of the colored light of different micro light-emitting diode display panels occurs, the possibility of stray light generation can be reduced because ineffective light is introduced into the subsequent optical system. Also, due to the arrangement of the first display panel and the second display panel of the display unit, the projection device has the advantages of a simple architecture and a small volume, can reduce the number of colored lights that require alignment, and can reduce the possibility of stray light generation in the system. In this way, the contrast of the video screen and the video quality can be further improved.

[0030] The present invention has been disclosed as above based on the foregoing preferred embodiments. However, the foregoing preferred embodiments are not for limiting the present invention. Those skilled in the art can make minor changes and refinements to the present invention without departing from the technical idea and scope of the present invention. Therefore, the protection scope of the present invention is based on what is defined in the appended claims. Also, any embodiment or claim scope of the present invention does not need to achieve all the objects, advantages, or features disclosed in the present invention. Also, a part of the abstract and the name of the invention are only for assisting in document search and do not limit the technical scope of the present invention. Also, terms such as "first" and "second" mentioned in this specification or claims are only for naming elements or for distinguishing other embodiments or scopes, and are not for limiting the upper or lower limits in terms of the number of elements.

Explanation of Reference Numerals

[0031] 100, 300: Display unit 110: First display panel 111: First light-emitting element 120: Wavelength conversion element 130: Second display panel 131: Second light-emitting element 140, 340: Light mixing element 150: Condensing element 151: First condensing unit 152: Second condensing unit 153: Third condensing unit 200: Projection device 210: Projection lens L1: Light of the first color L2: Light of the second color L3: Light of the third color NR: Non-conversion region PR1: First part PR2: Second part PX1: First pixel region PX2: Second pixel region QD: Quantum dot conversion material QR: Conversion region

Claims

1. A display unit including a first display panel, a wavelength conversion element, a second display panel, and a light mixing element, wherein the first display panel has a plurality of first light emitting elements, and the plurality of first light emitting elements are used to provide light of a first color, the wavelength conversion element is located in the propagation path of the light of the first color, and has a conversion region and a non-conversion region. A quantum dot conversion material is installed in the conversion region. After a part of the light of the first color passes through the conversion region, it is converted into light of a third color, and the other part of the light of the first color passes through the non-conversion region, the second display panel has a plurality of second light emitting elements, and the plurality of second light emitting elements are used to provide light of a second color, the light mixing element is located in the propagation paths of the light of the first color, the light of the second color, and the light of the third color, and is used to guide the light of the third color, the light of the second color, and the light of the first color that has passed through the non-conversion region to form an image light beam. A display unit.

2. The display unit according to claim 1, wherein the first display panel has a plurality of first pixel regions, each of the first light emitting elements is installed corresponding to each of the first pixel regions, the non-conversion region corresponds to a first part of the plurality of first pixel regions, the conversion region corresponds to a second part of the plurality of first pixel regions, and the number of the first part of the plurality of first pixel regions is less than or equal to the number of the second part of the plurality of first pixel regions. A display unit.

3. The display unit according to claim 2, further including a light condensing element, wherein the light condensing element is installed in the propagation paths of the wavelength conversion element and the light of the second color, and is used to make the emission angles of the light of the first color, the light of the second color, and the light of the third color equal, the light condensing element has a plurality of first light condensing units and a plurality of second light condensing units, each of the first light condensing units is installed corresponding to each of the first parts of the plurality of first pixel regions, and each of the second light condensing units is installed corresponding to each of the second parts of the plurality of first pixel regions. A display unit.

4. The display unit according to claim 3, The second display panel has a plurality of second pixel regions, the light condensing element further includes a plurality of third light condensing units, each of the third light condensing units is installed corresponding to each of the plurality of second pixel regions, each of the second light emitting elements is installed corresponding to each of the second pixel regions, there is a one-to-many correspondence between each of the second pixel regions and each of the first pixel regions, the display unit has a plurality of display pixel regions, and there is a one-to-one correspondence between each of the display pixel regions and each of the second pixel regions, the display unit.

5. The display unit according to claim 2, wherein the second display panel has a plurality of second pixel regions, each of the second light emitting elements is installed corresponding to each of the second pixel regions, there is a one-to-one correspondence between each of the second pixel regions and each of the first pixel regions, the display unit has a plurality of display pixel regions, and both each of the first pixel regions and each of the second pixel regions have the same many-to-one correspondence for each of the display pixel regions, the display unit.

6. The display unit according to claim 1, wherein the light of the first color is blue light, the light of the second color is red light, and the light of the third color is green light, the display unit.

7. The display unit according to claim 1, wherein the light of the first color is blue light, the light of the second color is green light, and the light of the third color is red light, the display unit.

8. A projection device including a display unit and a projection lens, wherein the display unit is used to provide an image light beam, and includes a first display panel, a wavelength conversion element, a second display panel, and a light mixing element, the first display panel has a plurality of first light emitting elements, and the plurality of first light emitting elements are used to provide light of a first color, the wavelength conversion element is located in the propagation path of the light of the first color, and has a conversion region and a non-conversion region. A quantum dot conversion material is installed in the conversion region. After a part of the light of the first color passes through the conversion region, it is converted into light of a third color, and the other part of the light of the first color passes through the non-conversion region, the second display panel has a plurality of second light emitting elements, and the plurality of second light emitting elements are used to provide light of a second color, the light mixing element is located in the propagation paths of the light of the first color, the light of the second color, and the light of the third color. The light of the third color, the light of the second color, and the light of the first color that has passed through the non-conversion region are guided by the light mixing element and then form the image light beam. A projection device, wherein the projection lens is located in the propagation path of the image light beam and is used to project the image light beam outside the projection device.

9. The projection device according to claim 8, wherein the first display panel has a plurality of first pixel regions, each of the first light-emitting elements is installed corresponding to each of the first pixel regions, the non-conversion region corresponds to a first part of the plurality of first pixel regions, the conversion region corresponds to a second part of the plurality of first pixel regions, and the number of the plurality of first pixel regions in the first part is less than or equal to the number of the plurality of first pixel regions in the second part.

10. The projection device according to claim 9, wherein the display unit further includes a light condensing element, the light condensing element is installed in the propagation path of the wavelength conversion element and the light of the second color, and is used to make the emission angles of the light of the first color, the light of the second color and the light of the third color equal. The light condensing element has a plurality of first light condensing units and a plurality of second light condensing units. Each of the first light condensing units is installed corresponding to each of the first parts of the plurality of first pixel regions, and each of the second light condensing units is installed corresponding to each of the second parts of the plurality of first pixel regions.

11. The projection device according to claim 10, wherein the second display panel has a plurality of second pixel regions, the light condensing element further includes a plurality of third light condensing units, each of the third light condensing units is installed corresponding to each of the plurality of second pixel regions, each of the second light-emitting elements is installed corresponding to each of the second pixel regions, each of the second pixel regions and each of the first pixel regions have a one-to-many correspondence, the display unit has a plurality of display pixel regions, and each of the display pixel regions and each of the second pixel regions have a one-to-one correspondence.

12. The projection device according to claim 9, wherein the second display panel has a plurality of second pixel regions, each of the second light-emitting elements is installed corresponding to each of the second pixel regions, each of the second pixel regions and each of the first pixel regions have a one-to-one correspondence, the display unit has a plurality of display pixel regions, and both each of the first pixel regions and each of the second pixel regions have the same many-to-one correspondence for each of the display pixel regions.

13. The projection device according to claim 8, wherein the light of the first color is blue light, the light of the second color is red light, and the light of the third color is green light.

14. The projection device according to claim 8, A projection device, wherein the light of the first color is blue light, the light of the second color is green light, and the light of the third color is red light.

Images