Illumination system and projection device

Abstract

The invention provides a lighting system. The lighting system provides a lighting beam. The lighting system comprises a first light source module, a second light source module, a third light source module, a first optical element, a second optical element and a third optical element. The first light source module only provides a first color light beam. The second light source module only provides a second-color light beam and a third-color light beam. The third light source module provides a third-color light beam. The first optical element, the second optical element and the third optical element are arranged on transmission paths of the first color light beam, the second color light beam and the third color light beam, and the first light source module and the second light source module are respectively arranged on two opposite sides of the first optical element and the second optical element. The second optical element is located between the first optical element and the third optical element. Therefore, the brightness of the illumination system is improved, and the uniformity of three colors in the illumination light beam is improved.

Description

Technical Field

[0001] This invention relates to an optical system and an electronic device, and more particularly to an illumination system and a projection device. Background Technology

[0002] A projection device is a display device used to generate large-sized images, and it has been continuously improving with the evolution and innovation of technology. The imaging principle of a projection device is to convert the illumination beam generated by the illumination system into an image beam through a light valve, and then project the image beam onto the projection target (such as a screen or wall) through a projection lens to form a projected image.

[0003] Furthermore, lighting systems have evolved alongside market demands for brightness, color saturation, lifespan, and environmental friendliness in projection devices. They have progressed from ultra-high-performance lamps (UHP lamps) and light-emitting diodes (LEDs) to the most advanced laser diode (LD) light sources. However, in current architectures, different colors of light are generated on different modules, each with its own heat dissipation module of varying size and type to improve light output efficiency. This approach results in an excessively large lighting system, and the combined light beams of different colors are not easily aligned, leading to uneven color distribution in the projected image.

[0004] The "Background Art" paragraph is only used to help understand the content of this invention. Therefore, the content disclosed in the "Background Art" paragraph may include some prior art that is not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not mean that the content or the problem to be solved by one or more embodiments of this invention was known or recognized by those skilled in the art before this application was filed. Summary of the Invention

[0005] The present invention provides a lighting system and a projection device that can improve the brightness of the lighting system and increase the uniformity of the lighting beam.

[0006] Other objects and advantages of the present invention can be further understood from the technical features disclosed herein.

[0007] To achieve one, some, or all of the above-mentioned objectives, or other objectives, the present invention provides an illumination system that provides an illumination beam. The illumination system includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element. The first light source module provides only a first color beam. The second light source module provides only a second color beam and a third color beam. The third light source module provides a third color beam. The first, second, and third optical elements are all disposed on the transmission paths of the first, second, and third color beams, respectively, and the first and second light source modules are located on opposite sides of the first and second optical elements, respectively. The second optical element is located between the first and third optical elements.

[0008] To achieve one or more of the above-mentioned objectives, or other objectives, the present invention further provides a projection device, including an illumination system, a light valve, and a projection lens. The illumination system provides an illumination beam. The illumination system includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element. The first light source module provides only a first color beam. The second light source module provides only a second color beam and a third color beam. The third light source module provides a third color beam. The first, second, and third optical elements are all disposed on the transmission paths of the first, second, and third color beams, respectively, and the first and second light source modules are located on opposite sides of the first and second optical elements, respectively. The second optical element is located between the first and third optical elements. 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.

[0009] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the lighting system and projection device of the present invention, the first light source module provides only a first color beam, the second light source module provides only a second color beam and a third color beam, and the third light source module provides a third color beam. The first, second, and third color beams are transmitted to different positions along different paths, respectively and evenly, through the arrangement of the first, second, and third light source modules, the first optical element, the second optical element, and the third optical element. Therefore, the multiple light spots formed by the first, second, and third color beams can be evenly distributed and symmetrical. Furthermore, adding a third light source module to provide an additional third color beam can further enhance the brightness of the lighting system and ensure that each path from the first to the fourth path has red, blue, and green light, providing a uniform red, blue, and green lighting beam.

[0010] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention.

[0012] Figure 2 This is a schematic diagram of a lighting system according to an embodiment of the present invention.

[0013] Figure 3 for Figure 2 A schematic diagram of a focusing element in a lighting system.

[0014] Figure 4 This is a schematic diagram of a lighting system according to another embodiment of the present invention.

[0015] List of reference numerals

[0016] 10: Projection device

[0017] 60: Light valve

[0018] 70: Projection lens

[0019] 100, 100A: Lighting system

[0020] 110: First Light Source Module

[0021] 112: First red laser diode

[0022] 114: Second Red Laser Diode

[0023] 116: Third Red Laser Diode

[0024] 118: Fourth Red Laser Diode

[0025] 120: Second Light Source Module

[0026] 122: First blue laser diode

[0027] 124: Second blue laser diode

[0028] 126, 132: First green laser diode

[0029] 128, 134: Second green laser diode

[0030] 130: Third Light Source Module

[0031] 140: First optical element

[0032] 150: Second optical element

[0033] 160, 160A: Third optical element

[0034] 162: Optical area

[0035] 164: Penetration Zone

[0036] 170: Concentrating element

[0037] A: Center

[0038] B1: First Blue Beam

[0039] B11, B21: Part One

[0040] B12, B22: Part Two

[0041] B2: Second Blue Beam

[0042] C1: First color beam

[0043] C2: Second-color beam

[0044] C31, C32: Third-color beams

[0045] G1: First Green Beam

[0046] G2: Second Green Beam

[0047] G3: Third Green Beam

[0048] G4: Fourth Green Beam

[0049] LB: Illumination beam

[0050] LI: Image Beam

[0051] R1: First Red Beam

[0052] R2: Second Red Beam

[0053] R3: Third Red Beam

[0054] R4: Fourth Red Beam

[0055] S1, S2, S3: Light spots

[0056] X, Y, Z: Axes. Detailed Implementation

[0057] The foregoing 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 accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0058] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention. Please refer to... Figure 1 This embodiment provides a projection device 10, including an illumination system 100, a light valve 60, and a projection lens 70. The illumination system 100 provides an illumination beam LB. The light valve 60 is disposed in the transmission path of the illumination beam LB to convert the illumination beam LB into an image beam LI. The projection lens 70 is disposed in the transmission path of the image beam LI and projects the image beam LI from the projection device 10 to a projection target (not shown), such as a screen or wall.

[0059] The illumination system 100 is used to provide an illumination beam LB. For example, in this embodiment, the illumination system 100 is composed of a combination of multiple light-emitting elements, wavelength conversion elements, light-diffusing elements, light-filtering elements, and multiple light-splitting and combining elements to provide light of different wavelengths to form an image beam LI. The multiple light-emitting elements are, for example, light-emitting diodes (LEDs) or laser diodes (LDs). Detailed implementation will be described in subsequent paragraphs.

[0060] The light valve 60 is, for example, a reflective light modulator such as a liquid crystal on silicon panel (LCoS panel) or a digital micromirror device (DMD). In some embodiments, the light valve 60 may also be a transmissive light modulator such as a transparent liquid crystal panel, an electro-optic modulator, a magneto-optic modulator, or an acousto-optic modulator (AOM). This invention does not limit the type or form of the light valve 60. The detailed steps and implementation methods of the method by which the light valve 60 converts the illumination beam LB into the image beam LI are sufficiently taught, suggested, and explained by knowledge of the art, and therefore will not be elaborated further.

[0061] The projection lens 70 may include, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses including biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 70 may also include planar optical lenses to project the image beam L1 from the light valve 60 onto the projection target by reflection. The present invention does not limit the type or form of the projection lens 70.

[0062] It should be noted that the axes of X, Y, and Z are drawn in each of the following figures, so that the perspective of each figure can be clearly understood.

[0063] Figure 2 This is a schematic diagram of a lighting system according to an embodiment of the present invention. Figure 3 for Figure 2 A schematic diagram of a focusing element in a lighting system. Figure 2 The displayed lighting system 100 is applicable Figure 1 The projection device 10 shown below is therefore applied to... Figure 1 The projection device 10 is used as an example for illustration. Please refer to [reference needed]. Figure 2 The lighting system 100 includes a first light source module 110, a second light source module 120, a third light source module 130, a first optical element 140, a second optical element 150, and a third optical element 160. In this embodiment, the lighting system 100 also includes a focusing element 170, such as a focusing lens, disposed on the transmission path of the light beams provided by all the first light source modules 110, the second light source module 120, and the third light source module 130, to converge the light beams and provide them to subsequent optical elements, such as a light-diffusing element (not shown).

[0064] Specifically, the first light source module 110 provides only a first color beam C1. The second light source module 120 provides only a second color beam C2 and a third color beam C31. The third light source module 130 provides a third color beam C32. A focusing element 170 is disposed on the transmission path of the first color beam C1, the second color beam C2, and the third color beams C31 and C32. For example, in this embodiment, the first color beam C1 is a red beam, the second color beam C2 is a blue beam, and the third color beams C31 and C32 are green beams. Therefore, it can be further defined that the first color beam C1 provided by the first light source module 110 also includes a first red beam R1, a second red beam R2, a third red beam R3, and a fourth red beam R4. The second color beam C2 provided by the second light source module 120 also includes a first blue beam B1 and a second blue beam B2, and the third color beam C31 provided by the second light source module 120 also includes a first green beam G1 and a second green beam G2. The third color beam C32 provided by the third light source module 130 also includes a third green beam G3 and a fourth green beam G4. In this embodiment, the first color beam C1 is the same color, the second color beam C2 is the same color, and the third color beams C31 and C32 are the same color. However, in different embodiments, the beams of the same color may have slight differences in wavelength range (for example, the wavelength of the first red beam R1 is 625 nanometers, while the wavelength of the second red beam R2 is 610 nanometers), and the present invention is not limited thereto.

[0065] In this embodiment, the extension direction of the substrate of the first light source module 110 is perpendicular to the extension direction of the substrate of the second light source module 120, and the extension direction of the substrate of the second light source module 120 is parallel to the extension direction of the substrate of the third light source module 130. However, in other embodiments, the extension directions of the substrates of the second light source module 120 and the third light source module 130 may be designed to be non-parallel, and the present invention is not limited thereto. It is worth mentioning that the first red beam R1, the second red beam R2, the third red beam R3, and the fourth red beam R4 provided by the first light source module 110 are linearly arranged, the first blue beam B1, the second blue beam B2, the first green beam G1, and the second green beam G2 provided by the second light source module 120 are linearly arranged, and the third green beam G3 and the fourth green beam G4 provided by the third light source module 130 are linearly arranged. In other words, the first light source module 110 includes at least one first red laser diode 112, at least one second red laser diode 114, at least one third red laser diode 116, and at least one fourth red laser diode 118 arranged linearly. The second light source module 120 includes at least one first blue laser diode 122, at least one second blue laser diode 124, at least one first green laser diode 126, and at least one second green laser diode 128 arranged linearly. The third light source module 130 includes at least one first green laser diode 132 and at least one second green laser diode 134 arranged linearly. Figure 3Taking the beam landing point as an example, in this embodiment, the first light source module 110 has four first red laser diodes 112, four second red laser diodes 114, four third red laser diodes 116, and four fourth red laser diodes 118, for a total of 16. The first red laser diode 112 is used to provide the first red beam R1, the second red laser diode 114 is used to provide the second red beam R2, the third red laser diode 116 is used to provide the third red beam R3, and the fourth red laser diode 118 is used to provide the fourth red beam R4. The second light source module 120 contains four first blue laser diodes 122, four second blue laser diodes 124, four first green laser diodes 126, and four second green laser diodes 128, for a total of 16. The first blue laser diode 122 provides a first blue beam B1, the second blue laser diode 124 provides a second blue beam B2, the first green laser diode 126 provides a first green beam G1, and the second green laser diode 128 provides a second green beam G2. The third light source module 130 contains four first green laser diodes 132 and four second green laser diodes 134, for a total of 8. The first green laser diode 132 provides a third green beam G3, and the second green laser diode 134 provides a fourth green beam G4. However, in different embodiments, the number of laser diodes of the same color can be any positive integer, and the present invention is not limited to this.

[0066] The first optical element 140, the second optical element 150, and the third optical element 160 are all disposed on the transmission paths of the first color beam C1, the second color beam C2, and the third color beams C31 and C32. The first light source module 110 and the second light source module 120 are located on opposite sides of the first optical element 140 and the second optical element 150, respectively. Specifically, the first light source module 110 faces the focusing element 170 and is located on one side of the first optical element 140 and the second optical element 150, while the second light source module 120 does not face the focusing element 170 and is located on the other side of the first optical element 140 and the second optical element 150. The third optical element 160 is located between the focusing element 170 and the second optical element 150. The second optical element 150 is located between the first optical element 140 and the third optical element 160. Therefore, by configuring the first optical element 140, the second optical element 150, and the third optical element 160, the first color beam C1, the second color beam C2, and the third color beams C31 and C32 can be combined to obtain the illumination beam LB (e.g., ...). Figure 1 ), where the obtained illumination beam LB is an illumination beam with an average color distribution (e.g. Figure 3 , in the following Figure 3(Further details will be provided in the description).

[0067] The first optical element 140, the second optical element 150, and the third optical element 160 are all used to allow the first color beam C1 to pass through. Specifically, the first optical element 140 is used to allow the first color beam C1 to pass through and to reflect the second color beam C2. For example, the first optical element 140 is, for instance, a dichroic mirror with blue reflection (DMB) used to reflect blue light and allow red light and other wavelengths of light to pass through.

[0068] The second optical element 150 is used to allow the first color beam C1 to pass through, to reflect a portion of the second color beam C2, to allow another portion of the second color beam C2 to pass through, and to reflect the third color beam C31. In this embodiment, the second optical element 150 reflects 50% of the second color beam C2 and allows 50% of the second color beam C2 to pass through. For example, the second optical element 150 is, for instance, a combination of a half mirror with blue (HMB) and a dichroic mirror with green reflect (DMG), used to partially transmit and partially reflect blue light, reflect green light, and allow red light to pass through.

[0069] The third optical element 160 includes an optical region 162 for allowing the first color beam C1 and the second color beam C2 to pass through, and for reflecting the third color beam C32. For example, the third optical element 160 is, for instance, a dichroic mirror with green reflect (DMG) for reflecting green light and allowing red and blue light to pass through.

[0070] Therefore, regarding the paths of each beam, the first color beam C1, the second color beam C2, and the third color beams C31 and C32 will be transmitted to different positions of the focusing element 170 via the configuration of the first light source module 110, the second light source module 120, the third light source module 130, the first optical element 140, the second optical element 150, and the third optical element 160, respectively and evenly along the first path P1, the second path P2, the third path P3, and the fourth path P4. The first path P1 to the fourth path P4 are parallel to each other and do not overlap. In this embodiment, the first optical element 140 is disposed on the transmission path from the first path P1 to the fourth path P4, the second optical element 150 is disposed on the transmission paths of the third path P3 and the fourth path P4, and the optical region 162 of the third optical element 160 is disposed on the transmission paths of the first path P1 and the second path P2.

[0071] Specifically, in this embodiment, the first red beam R1 provided by the first light source module 110 is transmitted to the focusing element 170 via the first red laser diode 112 along the first path P1 through the optical area 162 of the first optical element 140 and the third optical element 160. The second red beam R2 provided by the first light source module 110 is transmitted to the focusing element 170 via the second red laser diode 114 along the second path P2 through the optical area 162 of the first optical element 140 and the third optical element 160. The third red beam R3 provided by the first light source module 110 is transmitted to the focusing element 170 via the third red laser diode 116 along the third path P3 through the first optical element 140 and the second optical element 150. The first red beam R4 provided by the first light source module 110 is transmitted to the focusing element 170 via the fourth red laser diode 118 along the fourth path P4 through the first optical element 140 and the second optical element 150.

[0072] Furthermore, the first blue beam B1 provided by the second light source module 120 is transmitted to the first optical element 140 by the first blue laser diode 122. The first blue beam B1 is reflected by the first optical element 140 and transmitted along the third path P3 to the second optical element 150. The first blue beam B1 is divided into a first part B11 and a second part B12 by the second optical element 150. The first part B11 of the first blue beam B1 is transmitted along the third path P3 to the focusing element 170. The second part B12 of the first blue beam B1 is transmitted to the first optical element 140. The second part B12 of the first blue beam B1 is reflected by the first optical element 140, passes through the optical area 162 of the third optical element 160 along the first path P1, and is transmitted to the focusing element 170. The second blue beam B2 provided by the second light source module 120 is transmitted to the first optical element 140 by the second blue laser diode 124. The second blue beam B2 is reflected by the first optical element 140 and transmitted along the fourth path P4 to the second optical element 150. The second blue beam B2 is split into a first part B21 and a second part B22 by the second optical element 150. The first part B21 of the second blue beam B2 is transmitted to the focusing element 170 along the fourth path P4. The second part B22 of the second blue beam B2 is transmitted to the first optical element 140, and by reflection from the first optical element 140, it passes through the optical area 162 of the third optical element 160 along the second path P2 and is transmitted to the focusing element 170. The first green beam G1 provided by the second light source module 120 is transmitted to the second optical element 150 by the first green laser diode 126, and by reflection from the second optical element 150, it is transmitted to the focusing element 170 along the third path P3. The second green beam G2 provided by the second light source module 120 is transmitted to the second optical element 150 by the second green laser diode 128, and by reflection from the second optical element 150, it is transmitted to the focusing element 170 along the fourth path P4.

[0073] Furthermore, the third green beam G3 provided by the third light source module 130 is transmitted to the optical area 162 of the third optical element 160 by the first green laser diode 132. The third green beam G3 is then transmitted to the focusing element 170 along the second path P2 by reflection from the optical area 162 of the third optical element 160. The fourth green beam G4 provided by the third light source module 130 is transmitted to the optical area 162 of the third optical element 160 by the second green laser diode 134. The fourth green beam G4 is then transmitted to the focusing element 170 along the first path P1 by reflection from the optical area 162 of the third optical element 160.

[0074] Please continue to refer to this. Figures 1 to 3Since the first color beam C1, the second color beam C2, and the third color beams C31 and C32 are transmitted evenly along the first path P1, the second path P2, the third path P3, and the fourth path P4 to different positions on the focusing element 170, the first color beam C1, the second color beam C2, and the third color beams C31 and C32 can form multiple light spots S1, S2, and S3 on the focusing element 170, and the multiple light spots S1, S2, and S3 are symmetrical about the center A of the focusing element 170. Specifically, these light spots S1, S2, and S3 are transmitted along the first path P1 to the fourth path P4 to different positions and overlap with each other. It is worth mentioning that, in this embodiment, since a third light source module 130 is added to provide a third green light beam G3 and a fourth green light beam G4, the brightness of the lighting system 100 can be further improved, and the first path P1 to the fourth path P4 can all have red, blue and green light, providing a uniform red, blue and green lighting beam LB, wherein the lighting beam LB has at least one of red light, blue light and green light.

[0075] Figure 4 This is a schematic diagram of a lighting system according to another embodiment of the present invention. Please refer to... Figure 4 The lighting system 100A in this embodiment is similar to... Figure 2 The illumination system 100 shown differs from the previous one in that, in this embodiment, the arrangement order of at least one first blue laser diode 122, at least one second blue laser diode 124, at least one first green laser diode 126, and at least one second green laser diode 128 in the second light source module 120 is different. Furthermore, the first optical element 140 is used to reflect the third-color beam C31 (i.e., the first green beam G1 and the second green beam G2) from the second light source module 120, and the second optical element 150 is used to allow the third-color beam C31 to pass through. The optical region 162 of the third optical element 160A is modified and positioned on the transmission paths of the second path P2 and the third path P3. Additionally, the third optical element 160A includes two penetration regions 164, with the optical region 162 connected between the two penetration regions 164. The two penetration regions 164 are, for example, transparent glass, used to allow the beam to pass through. Specifically, the extension length of the two penetration regions 164 can be compared to the extension length of the first optical element 140. For example, in this embodiment, the coverage area of ​​the third optical element 160A, extending through the two penetration areas 164, is the same as that of the first optical element 140. Therefore, all light beams transmitted along the first path P1 to the fourth path P4 can pass through the third optical element 160A. This prevents beam deflection caused by incident on the edge of the optical area 162, thereby reducing brightness loss and increasing the brightness of the illumination system 100A.

[0076] In detail, in this embodiment, the first red beam R1 provided by the first light source module 110 is transmitted to the focusing element 170 via the first red laser diode 112 along the first path P1 through the penetration area 164 of the first optical element 140 and the third optical element 160A. The second red beam R2 provided by the first light source module 110 is transmitted to the focusing element 170 via the second red laser diode 114 along the second path P2 through the optical area 162 of the first optical element 140 and the third optical element 160A. The third red beam R3 provided by the first light source module 110 is transmitted to the focusing element 170 via the third red laser diode 116 along the third path P3 through the optical area 162 of the first optical element 140, the second optical element 150, and the third optical element 160A. The first red beam R4 provided by the first light source module 110 passes through the penetration area 164 of the first optical element 140, the second optical element 150 and the third optical element 160A along the fourth path P4 of the fourth red laser diode 118 and is transmitted to the focusing element 170.

[0077] Furthermore, the first blue beam B1 provided by the second light source module 120 is transmitted to the first optical element 140 by the first blue laser diode 122. The first blue beam B1 is reflected by the first optical element 140 and transmitted along the third path P3 to the second optical element 150. The first blue beam B1 is divided into a first part B11 and a second part B12 by the second optical element 150. The first part B11 of the first blue beam B1 passes through the optical region 162 of the third optical element 160A along the third path P3 and is transmitted to the focusing element 170. The second part B12 of the first blue beam B1 is transmitted to the first optical element 140. The second part B12 of the first blue beam B1 passes through the penetration region 164 of the third optical element 160A along the first path P1 by the reflection of the first optical element 140 and is transmitted to the focusing element 170. The second blue beam B2 provided by the second light source module 120 is transmitted to the second optical element 150 via the second blue laser diode 124. The second blue beam B2 is divided into a first part B21 and a second part B22 by the second optical element 150. The first part B21 of the second blue beam B2 passes through the penetration area 164 of the third optical element 160A along the fourth path P4 and is transmitted to the focusing element 170. The second part B22 of the second blue beam B2 is transmitted to the first optical element 140. The second part B22 of the second blue beam B2 passes through the optical area 162 of the third optical element 160A along the second path P2 by reflection from the first optical element 140 and is transmitted to the focusing element 170. The first green beam G1 provided by the second light source module 120 is transmitted through the second optical element 150 by the first green laser diode 126 and then to the first optical element 140. The first green beam G1 is reflected by the first optical element 140 and passes through the penetration area 164 of the third optical element 160A along the fourth path P4, and is then transmitted to the focusing element 170. The second green beam G2 provided by the second light source module 120 is transmitted through the second green laser diode 128 to the first optical element 140. The second green beam G2 is reflected by the first optical element 140 and passes through the penetration area 164 of the second optical element 150 and the third optical element 160A along the fourth path P4, and is then transmitted to the focusing element 170.

[0078] Furthermore, the third green beam G3 provided by the third light source module 130 is transmitted to the optical area 162 of the third optical element 160A via the first green laser diode 132. The third green beam G3 is then reflected along the third path P3 to the focusing element 170 by the reflection from the optical area 162 of the third optical element 160A. The fourth green beam G4 provided by the third light source module 130 is transmitted to the optical area 162 of the third optical element 160A via the second green laser diode 134. The fourth green beam G4 is then reflected along the second path P2 to the focusing element 170 by the reflection from the optical area 162 of the third optical element 160A. This further enhances the brightness of the illumination system 100 and ensures that all paths from the first path P1 to the fourth path P4 emit red, blue, and green light, providing a uniform red, blue, and green illumination beam.

[0079] In summary, in the lighting system and projection device of the present invention, the first light source module provides only a first color beam, the second light source module provides only a second color beam and a third color beam, and the third light source module provides the third color beam. The first, second, and third color beams are transmitted to different positions along different paths, respectively and evenly, through the arrangement of the first, second, and third light source modules, the first optical element, the second optical element, and the third optical element. Therefore, the multiple light spots formed by the first, second, and third color beams are evenly distributed and symmetrical. Furthermore, adding a third light source module to provide an additional third color beam further enhances the brightness of the lighting system and ensures that each path from the first to the fourth path has red, blue, and green light, providing a uniform red, blue, and green lighting beam.

[0080] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made in accordance with the claims and specification of the present invention are still within the scope of this patent. Furthermore, no embodiment or claim of the present invention needs to achieve all the objectives, advantages, or features disclosed in the present invention. In addition, the abstract and title of the invention are only used to assist in patent document retrieval and are not intended to limit the scope of the invention. Moreover, the terms "first," "second," etc., mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A lighting system, characterized in that, The lighting system provides an illumination beam and includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element, wherein: The first light source module only provides the first color beam; The second light source module only provides the second color beam and the third color beam; The third light source module provides the third color beam; The first optical element, the second optical element, and the third optical element are all disposed on the transmission paths of the first color beam, the second color beam, and the third color beam, and the first light source module and the second light source module are respectively located on opposite sides of the first optical element and the second optical element, and the second optical element is located between the first optical element and the third optical element.

2. The lighting system according to claim 1, characterized in that, The extension direction of the substrate of the first light source module is perpendicular to the extension direction of the substrate of the second light source module, and the extension direction of the substrate of the second light source module is parallel to the extension direction of the substrate of the third light source module.

3. The lighting system according to claim 1, characterized in that, The first light source module includes at least one first red laser diode, at least one second red laser diode, at least one third red laser diode, and at least one fourth red laser diode arranged in a linear arrangement. The second light source module includes at least one first blue laser diode, at least one second blue laser diode, at least one first green laser diode, and at least one second green laser diode arranged in a linear arrangement. The third light source module includes at least one first green laser diode and at least one second green laser diode arranged in a linear arrangement.

4. The lighting system according to claim 1, characterized in that, The first optical element, the second optical element, and the third optical element are all used to allow the first color beam to pass through.

5. The lighting system according to claim 1, characterized in that, The first optical element is used to allow the first color beam to pass through and to reflect the second color beam.

6. The lighting system according to claim 5, characterized in that, The first optical element is also used to reflect the third color beam.

7. The lighting system according to claim 1, characterized in that, The second optical element is used to allow the first color beam to pass through, to reflect a portion of the second color beam and allow another portion of the second color beam to pass through, and to reflect the third color beam.

8. The lighting system according to claim 1, characterized in that, The second optical element is used to allow the first color beam to pass through, and to reflect a portion of the second color beam and allow another portion of the second color beam to pass through, and to allow the third color beam to pass through.

9. The lighting system according to claim 1, characterized in that, The third optical element includes an optical region for allowing the first and second color beams to pass through, and for reflecting the third color beam.

10. The lighting system according to claim 9, characterized in that, The third optical element further includes two penetration regions connected between the two penetration regions, which are used to allow light beams to pass through.

11. The lighting system according to claim 1, characterized in that, The lighting system further includes a focusing element, which is disposed on the transmission path of the first color beam, the second color beam, and the third color beam, and the third optical element is located between the focusing element and the second optical element, wherein the first color beam, the second color beam, and the third color beam form multiple light spots on the focusing element, and the multiple light spots are symmetrical about the center of the focusing element.

12. The lighting system according to claim 11, characterized in that, The first color beam provided by the first light source module includes a first red beam, a second red beam, a third red beam, and a fourth red beam. The first red beam is transmitted along a first path to the first optical element and the focusing element. The second red beam is transmitted along a second path to the first optical element, the third optical element, and the focusing element. The third red beam is transmitted along a third path to the first optical element, the second optical element, and the focusing element. The fourth red beam is transmitted along a fourth path to the first optical element, the second optical element, and the focusing element.

13. The lighting system according to claim 12, characterized in that, The second light source module provides a second blue beam, comprising a first blue beam and a second blue beam. The first blue beam is transmitted to the first optical element. The first blue beam is reflected by the first optical element and transmitted along the third path to the second optical element. The first blue beam is divided into a first part and a second part by the second optical element. The first part of the first blue beam is transmitted along the third path to the focusing element. The second part of the first blue beam is transmitted to the first optical element. The second part of the first blue beam is reflected by the first optical element and transmitted along the first path to the third optical element and the focusing element. The second blue beam is transmitted to the first optical element. The second blue beam is reflected by the first optical element and transmitted along the fourth path to the second optical element. The second blue beam is divided into a first part and a second part by the second optical element. The first part of the second blue beam is transmitted along the fourth path to the focusing element. The second portion is transmitted to the first optical element. The second portion of the second blue beam is transmitted along the second path to the third optical element and the focusing element by reflection from the first optical element. The third color beam provided by the second light source module includes a first green beam and a second green beam. The first green beam is transmitted to the second optical element. The first green beam is transmitted along the third path to the focusing element by reflection from the second optical element. The second green beam is transmitted to the second optical element. The second green beam is transmitted along the fourth path to the focusing element by reflection from the second optical element. The third color beam provided by the third light source module includes a third green beam and a fourth green beam. The third green beam is transmitted to the third optical element. The third green beam is transmitted along the second path to the focusing element by reflection from the third optical element. The fourth green beam is transmitted to the third optical element. The fourth green beam is transmitted along the first path to the focusing element by reflection from the third optical element.

14. The lighting system according to claim 12, characterized in that, The second light source module provides a second blue beam, comprising a first blue beam and a second blue beam. The first blue beam is transmitted to the first optical element. The first blue beam is reflected by the first optical element and transmitted along the third path to the second optical element. The first blue beam is divided into a first part and a second part by the second optical element. The first part of the first blue beam is transmitted along the third path to the third optical element and the focusing element. The second part of the first blue beam is transmitted to the first optical element. The second part of the first blue beam is reflected by the first optical element and transmitted along the first path to the focusing element. The second blue beam is transmitted to the second optical element. The second blue beam is divided into a first part and a second part by the second optical element. The first part of the second blue beam is transmitted along the fourth path to the focusing element. The second part of the second blue beam is transmitted to the first optical element. The second part of the second blue beam... The third color beam provided by the second light source module includes a first green beam and a second green beam. The first green beam passes through the second optical element to the first optical element. The first green beam is reflected by the first optical element and transmitted along the first path to the focusing element. The second green beam is transmitted to the first optical element. The second green beam is reflected by the first optical element and transmitted along the fourth path to the second optical element and the focusing element. The third color beam provided by the third light source module includes a third green beam and a fourth green beam. The third green beam is transmitted to the third optical element. The third green beam is reflected by the third optical element and transmitted along the third path to the focusing element. The fourth green beam is transmitted to the third optical element. The fourth green beam is reflected by the third optical element and transmitted along the second path to the focusing element.

15. The lighting system according to claim 12, characterized in that, The first path to the fourth path are parallel to each other and do not overlap.

16. A projection device, characterized in that, The projection device includes an illumination system, a light valve, and a projection lens, wherein: The lighting system provides an illumination beam and includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element, wherein: The first light source module only provides the first color beam; The second light source module only provides the second color beam and the third color beam; The third light source module provides the third color beam; The first optical element, the second optical element, and the third optical element are all disposed on the transmission paths of the first color beam, the second color beam, and the third color beam, and the first light source module and the second light source module are respectively located on opposite sides of the first optical element and the second optical element, and the second optical element is located between the first optical element and the third optical element; The light valve is disposed in the transmission path of the illumination beam to convert the illumination beam into an image beam; and The projection lens is positioned on the transmission path of the image beam to project the image beam out of the projection device.

17. The projection device according to claim 16, characterized in that, The extension direction of the substrate of the first light source module is perpendicular to the extension direction of the substrate of the second light source module, and the extension direction of the substrate of the second light source module is parallel to the extension direction of the substrate of the third light source module.

18. The projection device according to claim 16, characterized in that, The first light source module includes at least one first red laser diode, at least one second red laser diode, at least one third red laser diode, and at least one fourth red laser diode arranged in a linear arrangement. The second light source module includes at least one first blue laser diode, at least one second blue laser diode, at least one first green laser diode, and at least one second green laser diode arranged in a linear arrangement. The third light source module includes at least one first green laser diode and at least one second green laser diode arranged in a linear arrangement.

19. The projection device according to claim 16, characterized in that, The first optical element, the second optical element, and the third optical element are all used to allow the first color beam to pass through.

20. The projection device according to claim 16, characterized in that, The first optical element is used to allow the first color beam to pass through and to reflect the second color beam.

21. The projection device according to claim 20, characterized in that, The first optical element is also used to reflect the third color beam.

22. The projection device according to claim 16, characterized in that, The second optical element is used to allow the first color beam to pass through, to reflect a portion of the second color beam and allow another portion of the second color beam to pass through, and to reflect the third color beam.

23. The projection device according to claim 16, characterized in that, The second optical element is used to allow the first color beam to pass through, and to reflect a portion of the second color beam and allow another portion of the second color beam to pass through, and to allow the third color beam to pass through.

24. The projection device according to claim 16, characterized in that, The third optical element includes an optical region for allowing the first and second color beams to pass through, and for reflecting the third color beam.

25. The projection device according to claim 24, characterized in that, The third optical element further includes two penetration regions connected between the two penetration regions, which are used to allow light beams to pass through.

26. The projection device according to claim 16, characterized in that, The lighting system further includes a focusing element, which is disposed on the transmission path of the first color beam, the second color beam, and the third color beam, and the third optical element is located between the focusing element and the second optical element, wherein the first color beam, the second color beam, and the third color beam form multiple light spots on the focusing element, and the multiple light spots are symmetrical about the center of the focusing element.

27. The projection device according to claim 26, characterized in that, The first color beam provided by the first light source module includes a first red beam, a second red beam, a third red beam, and a fourth red beam. The first red beam is transmitted along a first path to the first optical element and the focusing element. The second red beam is transmitted along a second path to the first optical element, the third optical element, and the focusing element. The third red beam is transmitted along a third path to the first optical element, the second optical element, and the focusing element. The fourth red beam is transmitted along a fourth path to the first optical element, the second optical element, and the focusing element.

28. The projection device according to claim 27, characterized in that, The second light source module provides a second blue beam, comprising a first blue beam and a second blue beam. The first blue beam is transmitted to the first optical element. The first blue beam is reflected by the first optical element and transmitted along the third path to the second optical element. The first blue beam is divided into a first part and a second part by the second optical element. The first part of the first blue beam is transmitted along the third path to the focusing element. The second part of the first blue beam is transmitted to the first optical element. The second part of the first blue beam is reflected by the first optical element and transmitted along the first path to the third optical element and the focusing element. The second blue beam is transmitted to the first optical element. The second blue beam is reflected by the first optical element and transmitted along the fourth path to the second optical element. The second blue beam is divided into a first part and a second part by the second optical element. The first part of the second blue beam is transmitted along the fourth path to the focusing element. The second portion is transmitted to the first optical element. The second portion of the second blue beam is transmitted along the second path to the third optical element and the focusing element by reflection from the first optical element. The third color beam provided by the second light source module includes a first green beam and a second green beam. The first green beam is transmitted to the second optical element. The first green beam is transmitted along the third path to the focusing element by reflection from the second optical element. The second green beam is transmitted to the second optical element. The second green beam is transmitted along the fourth path to the focusing element by reflection from the second optical element. The third color beam provided by the third light source module includes a third green beam and a fourth green beam. The third green beam is transmitted to the third optical element. The third green beam is transmitted along the second path to the focusing element by reflection from the third optical element. The fourth green beam is transmitted to the third optical element. The fourth green beam is transmitted along the first path to the focusing element by reflection from the third optical element.

29. The projection device according to claim 27, characterized in that, The second light source module provides a second blue beam, comprising a first blue beam and a second blue beam. The first blue beam is transmitted to the first optical element. The first blue beam is reflected by the first optical element and transmitted along the third path to the second optical element. The first blue beam is divided into a first part and a second part by the second optical element. The first part of the first blue beam is transmitted along the third path to the third optical element and the focusing element. The second part of the first blue beam is transmitted to the first optical element. The second part of the first blue beam is reflected by the first optical element and transmitted along the first path to the focusing element. The second blue beam is transmitted to the second optical element. The second blue beam is divided into a first part and a second part by the second optical element. The first part of the second blue beam is transmitted along the fourth path to the focusing element. The second part of the second blue beam is transmitted to the first optical element. The second part of the second blue beam... The third color beam provided by the second light source module includes a first green beam and a second green beam. The first green beam passes through the second optical element to the first optical element. The first green beam is reflected by the first optical element and transmitted along the first path to the focusing element. The second green beam is transmitted to the first optical element. The second green beam is reflected by the first optical element and transmitted along the fourth path to the second optical element and the focusing element. The third color beam provided by the third light source module includes a third green beam and a fourth green beam. The third green beam is transmitted to the third optical element. The third green beam is reflected by the third optical element and transmitted along the third path to the focusing element. The fourth green beam is transmitted to the third optical element. The fourth green beam is reflected by the third optical element and transmitted along the second path to the focusing element.

30. The projection device according to claim 27, characterized in that, The first path to the fourth path are parallel to each other and do not overlap.

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