TWI823539B - Projection apparatus - Google Patents

Abstract

A projection apparatus including a light source module, an eccentric-collimating lens, a prism lens group, a light valve and a projection lens is provided. The light source module is configured to provide an illumination light beam. The eccentric-collimating lens is disposed between the light sources and the light valve on a transmission path of the illumination light beam. The light valve is configured to convert the illumination light beam into an image light beam. The projection lens is configured to project the image light beam out of the projection apparatus. A first included angle between a first transmission direction of the illumination light beam incident on the eccentric-collimating lens and a central axis of the eccentric-collimating lens is greater than 0. The first transmission direction and a second transmission direction of the image beam exiting from the light valve are perpendicular to each other.

Description

projection device

The present invention relates to a display device, and in particular to a projection device.

The current optical architecture of micro projectors mainly uses light emitting diodes or laser diodes that can produce light beams of different colors as the high-brightness light source of the projector. The image beam is projected out of the projector by the projection lens through optical components. At present, the overall structure of the projector cannot be reduced, which increases the cost and makes the appearance structural design difficult. Furthermore, because the conventional coating process cannot achieve the same transmittance in the S-polarization direction of the beam as in the P-polarization direction, so There must be a higher transmittance in one of the polarization directions, which will cause the brightness of one of the red, blue, or green lights with different polarization directions in the laser light source to be lower, resulting in poor color uniformity of the image beam. problem.

The "prior art" paragraph is only used to help understand the content of the present invention. Therefore, the content disclosed in the "prior art" paragraph may contain some conventional technologies that do not constitute common knowledge to those with ordinary knowledge in the technical field. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of the present invention have been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides a projection device that can tilt the optical path part and use an eccentric collimating lens to help reduce the structure of the projection device, thereby reducing costs and increasing the freedom of appearance structure design. In addition, the projection device uses a half-wave plate, which can solve the problem of low brightness of one of the red, blue, and green lights with different polarization directions in the light source (especially the laser light source), resulting in uniform color of the image beam. Poor problem.

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

In order to achieve one, part or all of the above objects or other objects, an embodiment of the present invention provides a projection device, which includes a light source module, an eccentric collimating lens, a lens assembly, a light valve and a projection lens. The light source is used to provide an illumination beam. The eccentric collimating lens is arranged between the light source and the light valve on the transmission path of the illumination beam. The light valve is arranged on the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is arranged on the transmission path of the image beam and is used to project the image beam out of the projection device. The lens group is disposed between the eccentric collimating lens and the light valve on the transmission path of the illumination beam, and is disposed between the light valve and the projection lens on the transmission path of the image beam. The first included angle between the first transmission direction of the illumination beam incident on the eccentric collimating lens and the central axis of the eccentric collimating lens is greater than 0. The first transmission direction is perpendicular to the second transmission direction of the image beam emerging from the light valve.

In an embodiment of the present invention, the above-mentioned first included angle is in the range of 7 degrees to 20 degrees.

In an embodiment of the present invention, the second included angle between the third transmission direction and the first transmission direction of the illumination beam emerging from the eccentric collimating lens is greater than 0.

In an embodiment of the present invention, the angle between the fourth transmission direction and the second transmission direction of the illumination beam incident on the optical system is less than 90 degrees.

In an embodiment of the present invention, the above-mentioned light source includes a first light source, a second light source and a third light source, respectively used to emit a first light beam, a second light beam and a third light beam. The projection device further includes a half-wave plate. At least one of the first beam, the second beam and the third beam forms an illumination beam. The first beam is a red light beam. The half-wave plate is disposed between the first light source and the eccentric collimating lens on the transmission path of the red light beam, and is disposed at the light outlet of the first light source.

In an embodiment of the present invention, the projection device further includes a first reflector, which is disposed between the eccentric collimating lens and the light source module on the transmission path of the illumination beam.

In an embodiment of the present invention, the first light source, the second light source and the third light source are disposed on the same surface of the same substrate, and the normal direction of the surface of the substrate is parallel to the fifth transmission direction.

In an embodiment of the present invention, the normal direction of the first reflecting mirror is parallel to the normal direction of the dichroic mirror and the normal direction of the reflecting mirror.

In an embodiment of the present invention, the normal direction of the first reflecting mirror is not parallel to the normal direction of the dichroic mirror and the normal direction of the reflecting mirror.

In an embodiment of the present invention, the projection device further includes a light uniforming element, which is arranged between the light guide module and the eccentric collimating lens on the transmission path of the illumination beam.

In an embodiment of the present invention, the projection device further includes a diffusion element, and the diffusion element is arranged between the light uniformity element and the light guide module.

In order to achieve one, part or all of the above objects or other objects, an embodiment of the present invention provides a projection device, which includes a light source module, a half-wave plate, a light guide module, a lens assembly, and a light source module. valve and projection lens. The light source module includes a first light source, a second light source and a third light source, respectively used to emit a first light beam, a second light beam and a third light beam. The first beam is a red light beam, and the half-wave plate is on the transmission path of the red light beam. At least one of the first beam, the second beam and the third beam forms an illumination beam. The light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is disposed on the transmission path of the image beam to project the image beam out of the projection device. The lens assembly plays a role in the transmission of the illumination beam. It is arranged between the light guide module and the light valve on the path, and is arranged between the light valve and the projection lens on the transmission path of the image beam.

Based on the above, in one embodiment of the present invention, the projection device includes an eccentric collimating lens, and is designed to make the illuminating beam incident on the eccentric collimating lens in a manner that deviates from the central axis of the eccentric collimating lens, thereby causing the illuminating beam to enter the eccentric collimating lens. The first included angle between the first transmission direction to the eccentric collimating lens and the central axis of the eccentric collimating lens is greater than 0, and the first transmission direction and the second transmission direction of the image beam emerging from the light valve are perpendicular to each other. Therefore, the projection device can further reduce the system architecture, thereby reducing costs and increasing the freedom of appearance structural design. In addition, in an embodiment of the present invention, the projection device further includes a half-wave plate, and is designed to be disposed between the first light source and the dichroic mirror on the transmission path of the first light beam (red light beam). , and is arranged at the light emitting position of the first light source. It can solve the problem of poor color uniformity of the image beam caused by the lower brightness of one of red light, blue light, and green light with different polarization directions in the light source (especially the laser light source).

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. Directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only for reference to the directions in the attached drawings. Accordingly, the directional terms used are illustrative and not limiting of the invention.

FIG. 1A is a schematic diagram of a projection device according to a first embodiment of the present invention. FIG. 1B is a schematic diagram of the relationship between the first, second, third, and fourth transmission directions and the central axis of the eccentric collimating lens in FIG. 1A. Please refer to FIG. 1A and FIG. 1B. This embodiment provides a projection device 10, which includes a light source module 100, an eccentric collimating lens 600, a lens group 800, a light valve 900 and a projection lens 1000.

In this embodiment, the light source module 100 is used to provide the illumination beam IL. As shown in FIG. 1A , the light source module 100 may include a first light source 110 , a second light source 120 and a third light source 130 for respectively emitting a first light beam C1 , a second light beam C2 and a third light beam C3 . The illumination beam IL includes at least one of the first beam C1, the second beam C2, and the third beam C3. The first light source 110, the second light source 120 and the third light source 130 may be light emitting diode light sources (LEDs) or laser diode light sources (LDs). The first beam C1, the second beam C2 and the third beam C3 may be red light, green light and blue light beams respectively, but the invention is not limited thereto.

In this embodiment, the light valve 900 is, for example, a spatial light modulator such as a digital micro-mirror device (DMD) or a liquid-crystal-on-silicon panel (LCOS panel). In addition, the projection lens 1000 is, for example, a combination including one or more optical lenses with diopter. Optical lenses include, for example, various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, meniscus lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. The present invention does not limit the type and type of the projection lens 1000 .

In this embodiment, the eccentric collimating lens 600 is disposed between the light source module 100 and the light valve 900 on the transmission path of the illumination beam IL. The light valve 900 is disposed on the transmission path of the illumination beam IL to convert the illumination beam IL into the image beam IB. The projection lens 1000 is disposed on the transmission path of the image beam IB, and is used to project the image beam IB out of the projection device 10 .

In this embodiment, the prism group 800 may be a total internal reflection prism group (TIR prism group) composed of two prism groups. The lens group 800 is disposed between the eccentric collimating lens 600 and the light valve 900 on the transmission path of the illumination beam IL, and is disposed between the light valve 900 and the projection lens 1000 on the transmission path of the image beam IB. The light group 800 is arranged between the light guide module 400 and the light valve 900 on the transmission path of the illumination beam IL. Among them, the illumination beam IL from the eccentric collimating lens 600 enters the lens group 800 and is reflected by the lens group 800 to the light valve 900. After the illumination beam IL is converted into the image beam IB by the light valve 900, the image beam IB enters and penetrates the lens assembly 800 and then is transmitted to the projection lens 1000.

In this embodiment, there is a first included angle θ1 between the first transmission direction D1 of the illumination beam IL incident on the eccentric collimating lens 600 and the central axis 600C of the eccentric collimating lens 600, and the first included angle θ1 is greater than 0. Generally speaking, central axis 600C may be defined as the axis at the geometric center of eccentric collimating lens 600 . That is to say, the illumination beam IL is designed to be incident on the eccentric collimating lens 600 in a manner deviated from the central axis 600C, so that the illumination beam IL is deflected by the eccentric collimating lens 600 .

In this embodiment, the first included angle θ1 falls within the range of 7 degrees to 20 degrees.

In this embodiment, the first transmission direction D1 and the second transmission direction D2 of the image beam IB emitted from the light valve 900 are perpendicular to each other.

In this embodiment, the second angle θ2 between the third transmission direction D3 and the first transmission direction D1 of the illumination beam IL emitted from the eccentric collimating lens 600 is greater than 0.

In this embodiment, the angle θ3 between the fourth transmission direction D4 and the second transmission direction D2 of the illumination beam IL incident on the light beam group 800 is less than 90 degrees. In this embodiment, the angle between the light incident surface 802 of the lens group 800 and the second transmission direction D2 is less than 90 degrees. In FIG. 1 , the third transmission direction D3 and the fourth transmission direction D4 coincide with each other, but the present invention is not limited thereto.

In this embodiment, the projection device 10 further includes a plurality of condenser lenses 200 , a plurality of collimating lenses 300 and a light guide module 400 . The condenser lens 200 and the collimating lens 300 are disposed between the light source module 100 and the light guide module 400, and are respectively disposed on the optical paths of the first beam C1, the second beam C2, and the third beam C3. The light guide module 400 is used to guide the first beam C1, the second beam C2 and the third beam C3 to the eccentric collimating lens 600. The light guide module 400 includes dichroic mirrors 410 and 420. The dichroic mirror 410, such as a dichroic mirror, is disposed on the transmission path of the first light beam C1 and the second light beam C2. The dichroic mirror 420 , for example, a dichroic mirror, which is disposed on the transmission path of the first light beam C1, the second light beam C2, and the third light beam C3. The dichroic mirror 410 is used to transmit red light and reflect green light. The dichroic mirror 420 is used to transmit red light and green light and reflect blue light. The first light beam C1 passes through the condenser lens 200 , the collimating lens 300 , the dichroic mirror 410 and the dichroic mirror 420 in sequence, and then is transmitted to the eccentric collimating lens 600 . After the second light beam C2 passes through the condenser lens 200 and the collimating lens 300 in sequence, it is reflected by the dichroic mirror 410 to the dichroic mirror 420 , then passes through the dichroic mirror 420 and is transmitted to the eccentric collimating lens 600 . After the third beam C3 passes through the condenser lens 200 and the collimator lens 300 in sequence, it is reflected by the dichroic mirror 420 to the eccentric collimator lens 600 .

In this embodiment, the projection device 10 further includes a light uniformity element 500 . The uniform light element 500 is arranged between the light guide module 400 and the eccentric collimating lens 600 on the transmission path of the illumination beam IL. The light uniforming element 500 is, for example, an integrating rod, a lens array, or other optical elements with a light uniformizing effect, but the invention is not limited thereto.

In this embodiment, the projection device 10 further includes a lens 700 . The lens 700 is arranged between the eccentric collimator lens 600 and the lens group 800 on the transmission path of the illumination light beam IL. Wherein, the lens 700 may be a condenser lens or a decentered collimating lens. When the lens 700 is used as an eccentric collimating lens, the illumination beam IL deflected by the eccentric collimating lens 600 is deflected again by the lens 700, so that the third transmission direction D3 and the fourth transmission direction D4 do not overlap.

Based on the above, in one embodiment of the present invention, the projection device 10 includes an eccentric collimating lens 600 and is designed to make the illumination beam IL incident on the eccentric collimating lens 600 in a manner that deviates from the central axis 600C of the eccentric collimating lens 600 , and then the first included angle θ1 between the first transmission direction D1 of the eccentric collimating lens 600 and the central axis 600C of the eccentric collimating lens 600 is greater than 0, and the first transmission direction D1 and the image beam IB are from The second transmission directions D2 emitted from the light valve 900 are perpendicular to each other. That is to say, the optical path of the illumination beam IL is deflected by the eccentric collimating lens 600 to compensate for the optical path difference at different positions (the optical path difference caused by the optical path group 800), thereby satisfying the requirement that the illumination beam IL is incident on the optical path group 800. The incident angle is 800. Therefore, the projection device 10 does not need to use additional reflectors to turn the light path. Moreover, the first transmission direction D1 and the second transmission direction D2 are perpendicular to each other, which helps to reduce the system architecture, thereby reducing costs and increasing the freedom of appearance structure design. In addition, the above-mentioned design can not only compensate for the optical path difference caused by the lens assembly 800, but also improve the uniformity of the image beam IB.

FIG. 2A is a perspective view of a projection device according to a second embodiment of the present invention. Figure 2B is a top view of Figure 2A. Please refer to FIGS. 2A and 2B . The projection device 10A is substantially the same as the projection device 10 of FIG. 1A . The main difference is that the projection device 10A further includes a half-wave plate 1100 . In this embodiment, the half-wave plate 1100 is disposed between the first light source 110 and the dichroic mirror 410 on the transmission path of the first light beam C1 (red light beam), and is disposed on the light output of the first light source 110 at.

In addition, in this embodiment, the light guide module 400' includes a dichroic mirror 410' and a reflecting mirror 420'. Among them, the dichroic mirror 410' is provided on the transmission path of the first light beam C1, the second light beam C2 and the third light beam C3, and the reflecting mirror 420' is provided on the transmission path of the second light beam C2 and the third light beam C3. The second light beam C2 and the third light beam C3 are reflected by the reflecting mirror 420' and the dichroic mirror 410' in sequence, and then are transmitted to the light uniforming element 500. The first light beam C1 passes through the dichroic mirror 410' and then is transmitted to the light uniforming element 500. The dichroic mirror 410' is used to allow red light to pass through and reflect green light and blue light.

In this embodiment, the projection device 10A further includes a diffusion element 1200 . The diffusion element 1200 may be a diffuser wheel. The diffusion element 1200 is arranged between the light uniforming element 500 and the light guide module 400'. Among them, the diffusion element 1200 homogenizes the passing illumination beam IL and destroys the generation of laser speckle, which helps to improve the problem of uneven illumination beam IL speckle. Therefore, the image effect presented by the projection device 10A is better good. In addition, the projection device 10A further includes a diffusion sheet 1201 disposed between the light guide module 400' and the light uniformity element 500. The diffusion sheet 1201 is used to transmit the illumination beam IL formed by at least one of the first beam C1, the second beam C2 and the third beam C3 to the uniform light element 500, and to homogenize the passing illumination beam IL and destroy the lightning. The generation of laser speckle.

Based on the above, in the embodiment, the projection device 10A is provided with a half-wave plate 1100 on the transmission path of the first light beam C1 (red light beam) to change the polarization direction of the red light beam C1. In a preferred embodiment, the polarization direction of the first beam C1 passing through the half-wave plate 1100 is the same as the polarization direction of the second beam C2 and the third beam C3. Since the optical effects produced by the optical films of each optical element in the optical system are related to the polarization direction of the light, setting up the half-wave plate 1100 helps to improve the uniformity and brightness of the illumination beam IL and the image beam IB. . Furthermore, the half-wave plate 1100 is designed to be disposed on the transmission path of the red light beam C1 instead of the green light beam, because it will reduce the brightness of the image beam IB output by the entire projection device 10A.

Referring to FIG. 2B , the first light source 110 , the second light source 120 and the third light source 130 are disposed on the surface of the same substrate. The first light source 110 can be one red light source or multiple red light sources. The second light source 120 and the third light source 130 can be arranged in the same array. The second light source 120 and the third light source 130 can also be multiple green light sources. and blue light sources. The half-wave plate 1100 is used to pass the red light generated by at least one red light source and convert its polarization direction.

FIG. 3A is a perspective view of a projection device according to a third embodiment of the present invention. Figure 3B is a top view of Figure 3A. Please refer to FIG. 3A and FIG. 3B. The projection device 10B is substantially the same as the projection device 10A of FIG. 2A. The main difference is that the projection device 10B further includes a first reflector 1300, which is disposed on the light guide module on the transmission path of the illumination beam IL. Between the group 400' and the light-diffusing element 500. The first reflector 1300 is arranged between the eccentric collimating lens 600 and the light source module 100 on the transmission path of the illumination beam IL.

In this embodiment, the fifth transmission direction D5 in which the illumination beam IL is incident on the first reflector 1300 is perpendicular to the first transmission direction D1 in which the illumination beam IL is incident on the eccentric collimating lens 600 . The first light source 110 , the second light source 120 and the third light source 130 are disposed on the same surface of the same substrate, and the normal direction of the surface of the substrate is parallel to the fifth transmission direction D5 . Furthermore, the normal direction of the first reflecting mirror 1300 is parallel to the normal direction of the dichroic mirror 410' and the normal direction of the reflecting mirror 420'. The remaining advantages of the projection device 10B are similar to the projection device 10A of FIG. 2A and will not be described again here.

FIG. 4A is a perspective view of a projection device according to a fourth embodiment of the present invention. FIG. 4B is a schematic diagram of FIG. 4A from another perspective. Please refer to FIG. 4A and FIG. 4B. The projection device 10C is substantially the same as the projection device 10B of FIG. 3A. The main difference is that in this embodiment, the fifth transmission direction D5 of the illumination beam IL incident on the first reflector 1300' is vertical. The illumination beam IL is incident on the first transmission direction D1 of the eccentric collimating lens 600 . The normal direction of the first reflecting mirror 1300' is not parallel to the normal direction of the dichroic mirror 410' and the normal direction of the reflecting mirror 420'. The remaining advantages of the projection device 10C are similar to those of the projection device 10B of FIG. 3A and will not be described again here.

To sum up, in one embodiment of the present invention, the projection device includes an eccentric collimating lens and is designed to make the illumination beam incident between the first transmission direction of the eccentric collimating lens and the central axis of the eccentric collimating lens. The first included angle is greater than 0, and the first transmission direction is perpendicular to the second transmission direction of the image beam emerging from the light valve. Moreover, the first transmission direction and the second transmission direction are perpendicular to each other, which helps to reduce the system architecture, thereby reducing costs and increasing the freedom of appearance structure design.

In one embodiment of the present invention, the projection device further includes a half-wave plate 1100, and is designed to be disposed between the first light source and the dichroic mirror on the transmission path of the first light beam (red light beam), and is arranged at the light emitting position of the first light source. It can solve the problem of poor color uniformity of the image beam caused by the lower brightness of one of red light, blue light, and green light with different polarization directions in the light source (especially the laser light source).

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, simple equivalent changes and modifications may be made based on the patent scope of the present invention and the description of the invention. All are still within the scope of the patent of this invention. In addition, any embodiment or patentable scope of the present invention does not need to achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract section and title are only used to assist in searching patent documents and are not intended to limit the scope of the invention. In addition, terms such as “first” and “second” mentioned in this specification or the scope of the patent application are only used to name elements or to distinguish different embodiments or scopes, and are not used to limit the number of elements. upper or lower limit.

10, 10A, 10B, 10C: Projection device 100:Light source module 110:First light source 120:Second light source 130:Third light source 200: condenser lens 300: Collimating lens 400, 400’: Light guide module 410, 410’, 420: Dichroic mirror 420’: Reflector 500: Evening light element 600: Decentered collimating lens 600C:Central shaft 700: Lens (concentrating lens/eccentric collimating lens) 800:稜鏡group 802: Light incident surface 900:Light valve 1000:Projection lens 1100:Half wave plate 1200: Diffusion element 1201: Diffuser 1300, 1300’: first reflector C1: first beam C2: Second beam C3: The third beam D1: first transfer direction D2: Second transfer direction D3: The third transmission direction D4: The fourth transfer direction D5: The fifth transmission direction IB: image beam IL: illumination beam θ1: the first included angle θ2: The second included angle θ3: included angle.

FIG. 1A is a schematic diagram of a projection device according to a first embodiment of the present invention. FIG. 1B is a schematic diagram of the relationship between the first, second, third, and fourth transmission directions and the central axis of the eccentric collimating lens in FIG. 1A. FIG. 2A is a perspective view of a projection device according to a second embodiment of the present invention. Figure 2B is a top view of Figure 2A. FIG. 3A is a perspective view of a projection device according to a third embodiment of the present invention. Figure 3B is a top view of Figure 3A. FIG. 4A is a perspective view of a projection device according to a fourth embodiment of the present invention. FIG. 4B is a schematic diagram of FIG. 4A from another perspective.

10:Projection device

100:Light source module

110:First light source

120:Second light source

130:Third light source

200: condenser lens

300:Collimating lens

400:Light guide module

410, 420: Dichroic mirror

500: Evening light element

600: Decentered collimating lens

600C:Central shaft

700: Lens

800:稜鏡group

802: Light incident surface

900:Light valve

1000:Projection lens

C1: first beam

C2: Second beam

C3: The third beam

D1: first transfer direction

D2: Second transfer direction

D3: The third transmission direction

D4: The fourth transfer direction

IB: image beam

IL: illumination beam

Claims (10)

A projection device, including: a light source module, a light guide module, a uniform light element, an eccentric collimating lens, a lens assembly, a light valve and a projection lens. The light source module is used to provide an illumination beam, and the light guide module A group is disposed between the light source module and the eccentric collimating lens on the transmission path of the illumination beam. The light uniformity element includes an integrating column or a lens array, and the light uniformity element is located between the illumination beam and the eccentric collimator lens. The transmission path is arranged between the light guide module and the eccentric collimating lens, and the eccentric collimating lens is arranged between the light source module and the light valve on the transmission path of the illumination beam, The light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is disposed on the transmission path of the image beam to project the image beam. Out of the projection device, the lens group is disposed between the eccentric collimating lens and the light valve on the transmission path of the illumination beam, and is disposed between the eccentric collimator lens and the light valve on the transmission path of the image beam. between the light valve and the projection lens, wherein: the first included angle between the first transmission direction of the illumination beam incident on the eccentric collimating lens and the central axis of the eccentric collimating lens is greater than 0; and The first transmission direction is perpendicular to the second transmission direction of the image beam emitted from the light valve. The projection device according to claim 1, wherein the first included angle is in a range of 7 degrees to 20 degrees. The projection device according to claim 1, wherein the second included angle between the third transmission direction of the illumination beam emerging from the eccentric collimating lens and the first transmission direction is greater than 0. The projection device according to claim 1, wherein the angle between the fourth transmission direction and the second transmission direction of the illumination beam incident on the lens group is less than 90 degrees. The projection device of claim 1, wherein the light source module includes a first light source, a second light source and a third light source, respectively used to emit a first light beam, a second light beam and a third light beam, and the projection device further including a half-wave plate, wherein: at least one of the first beam, the second beam and the third beam forms the illumination beam; the first beam is a red light beam; and the The half-wave plate is disposed between the first light source and the eccentric collimating lens on the transmission path of the red light beam, and is disposed at the light emission point of the first light source. The projection device according to claim 1, further comprising a first reflector disposed between the eccentric collimating lens and the light source module on the transmission path of the illumination beam. The projection device according to claim 5, wherein the first light source, the second light source and the third light source are disposed on the same surface of the same substrate, and the normal direction of the surface of the substrate is parallel to the first light source. Fifth transmission direction, the fifth transmission direction is perpendicular to the first transmission direction. The projection device of claim 6, wherein the light guide module further includes a dichroic mirror and a reflecting mirror, the normal direction of the first reflecting mirror is parallel to the normal direction of the dichroic mirror and the The normal direction of the reflector. The projection device of claim 6, wherein the light guide module further includes a dichroic mirror and a reflective mirror, and the normal direction of the first reflective mirror is not parallel to the normal direction of the dichroic mirror and the normal direction of the first reflective mirror. The normal direction of the reflector. The projection device according to claim 1, further comprising a diffusion element disposed between the light uniformity element and the light guide module.

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