Lighting system and projection device

Abstract

The present application provides a kind of illumination system and projection device, illumination system includes first light emitting unit, first reflector, second light emitting unit and second reflector.First light emitting unit is used to emit first light beam, and first reflector is used to reflect first light beam to first direction.Second light emitting unit is used to emit second light beam, and second reflector is used to reflect second light beam to first direction.First reflector and second reflector are arranged in second direction, and first reflector and second reflector are cross-shaped when viewed from second direction, wherein second direction is perpendicular to first direction.

Description

Technical Field

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

[0002] As users demand higher and higher image brightness from projection devices, the number and wattage of light-emitting elements used in the lighting systems of projection devices are also increasing, and there is even a trend towards higher-power laser light sources.

[0003] To improve image brightness, conventional techniques use beam combiners to combine the beams emitted by multiple laser sources and then transmit them to a receiving lens. However, when three laser sources are used, the distribution of the light spots illuminating the receiving lens is large and asymmetrical. This not only affects the uniformity of image brightness, but the light spots distributed at the edges of the receiving lens also result in poor light efficiency.

[0004] On the other hand, when four sets of laser light sources are used, although the distribution range of the light spots illuminating the light-collecting lens is symmetrical, it is relatively large, and there is no light near the optical axis of the light-collecting lens, while the light spots are closer to the edge of the light-collecting lens. As a result, the light efficiency of the projection device will be poor.

[0005] Therefore, it is necessary to design a new type of lighting system and projection device to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide a lighting system and projection device that can effectively reduce the distribution range of the light spots formed by the first and second reflectors after reflecting the first and second light beams, so as to concentrate the light spots and improve light efficiency.

[0007] To achieve the above objectives, the present invention provides a lighting system comprising: a first light-emitting unit for emitting a first light beam; a first reflector for reflecting the first light beam in a first direction; a second light-emitting unit for emitting a second light beam; and a second reflector for reflecting the second light beam in the first direction, wherein the first reflector and the second reflector are arranged in a second direction, and when viewed from the second direction, the first reflector and the second reflector are intersecting, wherein the second direction is perpendicular to the first direction.

[0008] Preferably, the first light-emitting unit includes a plurality of laser diodes, and the second light-emitting unit includes a plurality of laser diodes.

[0009] Preferably, the first reflector and the second reflector are arranged on a reference axis parallel to the second direction, and the first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other.

[0010] Preferably, it further includes: a third light-emitting unit for emitting a third light beam; and a third reflector for reflecting the third light beam toward the first direction, wherein the first reflector, the second reflector and the third reflector are arranged in the second direction, and the second reflector and the third reflector are intersecting when viewed from the second direction.

[0011] Preferably, the first reflector and the third reflector are arranged in parallel.

[0012] Preferably, the first reflector, the second reflector, and the third reflector are arranged on a reference axis parallel to the second direction, the first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other, the second light-emitting unit and the third light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other, and the first light-emitting unit and the third light-emitting unit are arranged in the second direction.

[0013] Preferably, the first light-emitting unit includes: a first substrate having opposing first and second sides; a plurality of first pads disposed on the first substrate and adjacent to the first side; and a plurality of first laser diodes disposed on the first substrate and offset toward the second side, and the third light-emitting unit includes: a second substrate having opposing third and fourth sides; a plurality of second pads disposed on the second substrate and adjacent to the third side; and a plurality of second laser diodes disposed on the second substrate and offset toward the fourth side, wherein the second side is located between the first and fourth sides, and the fourth side is located between the second and third sides.

[0014] Preferably, the second light-emitting unit includes a plurality of third laser diodes positioned in the space between the second side and the fourth side.

[0015] Preferably, the device further includes a beam splitting unit disposed on the transmission path of the excitation beam formed by the first beam from the first reflector, the second beam from the second reflector, and the third beam from the third reflector. The beam splitting unit is used to transmit a first portion of the excitation beam to a wavelength conversion material, which converts the first portion of the excitation beam into a converted beam that is transmitted back to the beam splitting unit. The beam splitting unit is used to transmit a second portion of the excitation beam to a diffuser, which reflects the second portion of the excitation beam back to the beam splitting unit. The beam splitting unit is also used to combine the converted beam and the second portion of the excitation beam into an illumination beam.

[0016] Preferably, the first light-emitting unit and the second light-emitting unit include at least one row of laser diodes arranged along the second direction.

[0017] The present invention also proposes a projection device, comprising: an illumination system and a light valve, wherein the illumination system comprises: a first light-emitting unit for emitting a first light beam; a first reflector for reflecting the first light beam in a first direction; a second light-emitting unit for emitting a second light beam; and a second reflector for reflecting the second light beam in the first direction, wherein the first reflector and the second reflector are arranged in a second direction and, when viewed from the second direction, the first reflector and the second reflector are intersecting, wherein the second direction is perpendicular to the first direction; and a light valve disposed on the transmission path of the first light beam from the first reflector and the second light beam from the second reflector, for converting the first light beam and the second light beam into an image beam.

[0018] Preferably, the first light-emitting unit includes a plurality of laser diodes, and the second light-emitting unit includes a plurality of laser diodes.

[0019] Preferably, the first reflector and the second reflector are arranged on a reference axis parallel to the second direction, and the first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other.

[0020] Preferably, the lighting system further includes: a third light-emitting unit for emitting a third light beam; and a third reflector for reflecting the third light beam toward the first direction, wherein the first reflector, the second reflector, and the third reflector are arranged in the second direction, and the second reflector and the third reflector are intersecting when viewed from the second direction. The light valve is disposed on the transmission path of the first light beam from the first reflector, the second light beam from the second reflector, and the third light beam from the third reflector, and the light valve converts the first light beam, the second light beam, and the third light beam into an image beam.

[0021] Preferably, the first reflector and the third reflector are arranged in parallel.

[0022] Preferably, the first reflector, the second reflector, and the third reflector are arranged on a reference axis parallel to the second direction, the first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other, the second light-emitting unit and the third light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other, and the first light-emitting unit and the third light-emitting unit are arranged in the second direction.

[0023] Preferably, the first light-emitting unit includes: a first substrate having opposing first and second sides; a plurality of first pads disposed on the first substrate and adjacent to the first side; and a plurality of first laser diodes disposed on the first substrate and offset toward the second side, and the third light-emitting unit includes: a second substrate having opposing third and fourth sides; a plurality of second pads disposed on the second substrate and adjacent to the third side; and a plurality of second laser diodes disposed on the second substrate and offset toward the fourth side, wherein the second side is located between the first and fourth sides, and the fourth side is located between the second and third sides.

[0024] Preferably, the second light-emitting unit includes a plurality of third laser diodes positioned in the space between the second side and the fourth side.

[0025] Preferably, the illumination system further includes a beam splitting unit disposed on the transmission path of the excitation beam formed by the first beam from the first reflector, the second beam from the second reflector, and the third beam from the third reflector. The beam splitting unit is used to transmit a first portion of the excitation beam to a wavelength conversion material, which converts the first portion of the excitation beam into a converted beam that is transmitted back to the beam splitting unit. The beam splitting unit is used to transmit a second portion of the excitation beam to a diffuser, which reflects the second portion of the excitation beam back to the beam splitting unit. The beam splitting unit is used to combine the converted beam and the second portion of the excitation beam into an illumination beam. A light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into the image beam.

[0026] Preferably, the first light-emitting unit and the second light-emitting unit include at least one row of laser diodes arranged along the second direction.

[0027] Compared with the prior art, the lighting system and projection device provided in the embodiments of the present invention adopt a first reflector and a second reflector in a cross shape, which can effectively reduce the distribution range of the light spot formed by the first reflector and the second reflector after reflecting the first light beam and the second light beam, so as to make the light spot more concentrated and improve the light efficiency, and make the distribution range of the light spot more symmetrical and make the illumination more uniform, thereby improving the brightness uniformity of the image provided by the projection device. Attached Figure Description

[0028] Figure 1A This is a schematic diagram of the structure of a projection device according to an embodiment of the present invention, which illustrates the optical path of the converted light beam.

[0029] Figure 1B for Figure 1AThe schematic diagram of the projection device shows the optical path of the excitation beam without passing through the wavelength conversion material.

[0030] Figure 2A , Figure 2B and Figure 2C for Figure 1A The diagram shows the structure of the light-emitting unit and reflector of the lighting system from three different perspectives.

[0031] Figure 3 for Figure 2A A front view schematic diagram of the first and third light-emitting units in the diagram.

[0032] Figure 4 for Figure 2A A front view schematic diagram of the second light-emitting unit in the diagram. Detailed Implementation

[0033] To provide a further understanding of the purpose, structure, features and functions of the present invention, detailed descriptions are provided below with reference to embodiments.

[0034] Figure 1A This is a schematic diagram of the structure of a projection device according to an embodiment of the present invention, which illustrates the optical path of the converted light beam. Figure 1B for Figure 1A The schematic diagram of the projection device shows the optical path of the excitation beam without passing through the wavelength conversion material. Figure 2A , Figure 2B and Figure 2C for Figure 1A The diagram shows the structure of the light-emitting unit and reflector of the lighting system from three different viewing angles. Please refer to... Figure 1A , Figure 1B and Figures 2A to 2C The projection device 200 of this embodiment includes an illumination system 100 and a light valve 210. The illumination system 100 includes a first light-emitting unit 110, a first reflector 120, a second light-emitting unit 130, and a second reflector 140. The first light-emitting unit 110 emits a first light beam 112, and the first reflector 120 reflects the first light beam 112 in a first direction D1. The second light-emitting unit 130 emits a second light beam 132, and the second reflector 140 reflects the second light beam 132 in the first direction D1. The first reflector 120 and the second reflector 140 are arranged in a second direction D2, and when viewed from the second direction D2, the first reflector 120 and the second reflector 140 are intersecting, wherein the second direction D2 is perpendicular to the first direction D1.

[0035] In this embodiment, the first light-emitting unit 110 includes a plurality of laser diodes 116, and the second light-emitting unit 130 includes a plurality of laser diodes 136. However, in other embodiments, the first light-emitting unit 110 and the second light-emitting unit 130 may also include other suitable light-emitting elements, such as light-emitting diodes.

[0036] Furthermore, in this embodiment, the first reflector 120 and the second reflector 140 are arranged on a reference axis A1 parallel to the second direction D2 (e.g., Figure 2C As shown in the figure, the first light-emitting unit 110 and the second light-emitting unit 130 are located on opposite sides of the reference axis A1, but not directly opposite each other.

[0037] In this embodiment, the lighting system 100 further includes a third light-emitting unit 150 and a third reflector 160. The third light-emitting unit 150 emits a third light beam 152, and the third reflector 160 reflects the third light beam 152 in a first direction D1. The first reflector 120, the second reflector 140, and the third reflector 160 are arranged in a second direction D2, and when viewed from the second direction D2, the second reflector 140 and the third reflector 160 are intersecting. In this embodiment, the first reflector 120 and the third reflector 160 are arranged in parallel. In this embodiment, the third light-emitting unit 150 includes a plurality of laser diodes 156. However, in other embodiments, the third light-emitting unit 150 may also include other suitable light-emitting elements, such as light-emitting diodes.

[0038] Furthermore, in this embodiment, the first reflector 120, the second reflector 140, and the third reflector 160 are arranged on a reference axis A1 parallel to the second direction D2 (e.g., Figure 2C (As illustrated). In addition, the first light-emitting unit 110 and the second light-emitting unit 130 are located on opposite sides of the reference axis A1 but not directly opposite each other, the second light-emitting unit 130 and the third light-emitting unit 160 are located on opposite sides of the reference axis A1 but not directly opposite each other, and the first light-emitting unit 110 and the third light-emitting unit 150 are arranged in the second direction D2.

[0039] The light valve 210 is disposed on the transmission paths of the first beam 112 from the first reflector 120, the second beam 132 from the second reflector 140, and the third beam 152 from the third reflector 160, to convert the excitation beam 102 composed of the first beam 112, the second beam 132, and the third beam 152 into an image beam 202. In this embodiment, the light valve 210 is, for example, a liquid crystal display panel. However, in other embodiments, the light valve 210 may also be a liquid-crystal-on-silicon panel (LCOS panel), a digital micromirror device (DMD), or other spatial light modulators.

[0040] In the lighting system 100 and projection device 200 of this embodiment, the use of a first reflector 120 and a second reflector 140 arranged in a cross shape, and a second reflector 140 and a third reflector 160 arranged in a cross shape, effectively reduces the distribution range of the light spots formed by the first reflector 120, the second reflector 140, and the third reflector 160 after reflecting the first beam 112, the second beam 132, and the third beam 152 (e.g., the distribution range of the light spot illuminating the light-collecting lens 195). This makes the light spot more concentrated, improving light efficiency (e.g., the light spot 195 is more concentrated towards the center of the light-collecting lens 195, thus improving light efficiency). Furthermore, the distribution range of the light spot is more symmetrical, resulting in more uniform illumination, thereby improving the brightness uniformity of the image provided by the projection device 200. In addition, because the distribution range of the light spot is smaller, the size of the optical elements can also be reduced. Furthermore, the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150 face each other but are not directly opposite each other, which can prevent the laser beams from hitting each other and affecting the lifespan of the laser diode. Moreover, the tilt angles of the first reflector 120, the second reflector 140, and the third reflector 160 can be finely adjusted to compensate for assembly errors of the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150. In another embodiment, the second light-emitting unit 130 can be rotated 90 degrees along an axis perpendicular to the first direction D1 and the second direction D2, so that the polarization direction of the second beam 132 is different from the polarization direction of the first beam 112 and the third beam 152, thereby suppressing laser speckle in the image of the low-projection device 200 and improving the brightness uniformity of the image.

[0041] However, the present invention does not limit the lighting system 100 to having a third light-emitting unit 150 and a third reflector 160. In another embodiment, the lighting system 100 may not have a third light-emitting unit 150 and a third reflector 160, but may have a first light-emitting unit 110, a second light-emitting unit 130, a first reflector 120, and a second reflector 140. In this embodiment, by using the first reflector 120 and the second reflector 140 in a cross-shaped configuration, the distribution range of the light spots formed by the first reflector 120 and the second reflector 140 after reflecting the first beam 112 and the second beam 132 can be effectively reduced, so that the light spots are more concentrated and the light efficiency is improved. Furthermore, the distribution range of the light spots can be made more symmetrical, so that the illumination is more uniform, thereby improving the brightness uniformity of the image provided by the projection device 200.

[0042] In this embodiment, the illumination system 100 further includes a beam splitting unit 170, disposed on the transmission path of the excitation beam 102 formed by the first beam 112 from the first reflector 120, the second beam 132 from the second reflector 140, and the third beam 152 from the third reflector 160. The beam splitting unit 170 is used to transmit the first portion 101 of the excitation beam 102 to the wavelength conversion material 180 (e.g., ...). Figure 1A (As illustrated). In this embodiment, the beam splitting unit 170 is, for example, a beam splitter that reflects the excitation beam 102 to the wavelength conversion material 180.

[0043] Wavelength conversion material 180 converts the first portion 101 of the excitation beam 102 into a converted beam 182 that is transmitted back to the beam splitter 170. In this embodiment, wavelength conversion material 180 is, for example, phosphor that converts the blue excitation beam 102 into a yellow converted beam 182.

[0044] On the other hand, the beam splitter 170 is used to transmit the second portion 103 of the excitation beam 102 to the diffuser 190 (e.g., the beam splitter 170 allows the second portion 103 to pass through and be transmitted to the diffuser 190), and the diffuser 190 reflects the second portion 103 of the excitation beam 102 back to the beam splitter 170 (e.g., ...). Figure 1B (as illustrated), and the beam splitting unit 170 is used to combine the conversion beam 182 and the second portion 103 of the excitation beam 102 into an illumination beam 105 (i.e., combining the two beams). Figure 1A The conversion beam 182 and Figure 1B Part Two (103). To make the optical path more clearly expressed, Figure 1A and Figure 1B The conversion beam 182 and the second part 103 are drawn separately, but in fact... Figure 1A and Figure 1BThe optical paths can coexist; for example, the conversion beam 182 and the second part 103 can coexist to synthesize the illumination beam 105. In one embodiment, the blue second part 103 and the yellow conversion beam 182 can be synthesized into a white illumination beam 105, and the first beam 112, the second beam 132, and the third beam 152 can have the same and a single wavelength, but the present invention is not limited thereto. The light valve 210 is disposed on the transmission path of the illumination beam 105 to convert the illumination beam 105 into an image beam 202. The image beam 202 can be projected onto a screen by a projection lens to form a display image. In addition, in this embodiment, at least one lens 197 can be provided on the optical path of the first part 101 and the second part 103 (in Figure 1A and Figure 1B (Taking multiple lenses 197 as an example) to achieve the effect of beam convergence.

[0045] Furthermore, in this embodiment, a collimating lens 196 and a light homogenizing element 198 may be sequentially arranged along the optical path between the light-collecting lens 195 and the beam-splitting unit 170. The light-collecting lens 195 and the collimating lens 196 can form an afocal system to reduce the overall distribution width of the first beam 112, the second beam 132, and the third beam 152. The light homogenizing element 198 is, for example, a fly-eye lens or a diffuser, which can homogenize the first beam 112, the second beam 132, and the third beam 152. In another embodiment, by employing a first reflector 120 and a second reflector 140 arranged in a cross shape, and a second reflector 140 and a third reflector 160 arranged in a cross shape, the distribution range of the light spots formed by the first reflector 120, the second reflector 140, and the third reflector 160 after reflecting the first beam 112, the second beam 132, and the third beam 152 can be effectively reduced. Therefore, it is not necessary to use the aforementioned afocal system to further reduce the distribution range of the light spots. Furthermore, since the light emitted by the laser source can be polarized, the entire assembly of the first reflector 120, the second reflector 140, the third reflector 160, the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150 can be parallel to the axis of the first direction D1 (e.g., parallel to the axis of the first direction D1). Figure 1A The axis of excitation beam 102 (which coincides with the axis of excitation beam) is rotated to an appropriate angle to change the polarity of the laser beam entering the system, thereby improving the uniformity of the image.

[0046] Figure 3 for Figure 2A A front view schematic diagram of the first and third light-emitting units in the diagram, and Figure 4 for Figure 2A A front view schematic diagram of the second light-emitting unit in the diagram. Please refer to... Figures 2A to 2C , Figure 3 and Figure 4 In this embodiment, the first light-emitting unit 110 includes a first substrate 111, a plurality of first pads 114, and a plurality of laser diodes 116. The first substrate 111 has opposing first edges S1 and second edges S2. The first pads 114 are disposed on the first substrate 111 and adjacent to the first edges S1. The laser diodes 116 are disposed on the first substrate 111 and offset towards the second edges S2. The third light-emitting unit 150 includes a second substrate 151, a plurality of second pads 154, and a plurality of laser diodes 156. The second substrate 151 has opposing third edges S3 and fourth edges S4. The second pads 154 are disposed on the second substrate 151 and adjacent to the third edges S3. The laser diodes 156 are disposed on the second substrate 151 and offset towards the fourth edges S4. The second edges S2 are located between the first edges S1 and the fourth edges S4, and the fourth edges S4 are located between the second edges S2 and the third edges S3.

[0047] In this embodiment, the second light-emitting unit 130 includes a plurality of laser diodes 136, which face the space between the second side S2 and the fourth side S4. In this embodiment, since the second side S2, where the laser diode 116 is located, and the fourth side S4, where the laser diode 156 is located, are arranged adjacent to each other, and the space between the second side S2 and the fourth side S4 faces the laser diode 136, the distribution range of the light spots formed by the first reflector 120, the second reflector 140, and the third reflector 160 after reflecting the first beam 112, the second beam 132, and the third beam 152 can be further reduced.

[0048] In this embodiment, the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150 each include at least one row of laser diodes. Figures 2A to 2C , Figure 3 and Figure 4 Taking two rows of laser diodes as an example, each row of laser diodes (such as laser diodes 116, 136, or 156) is arranged along the second direction D2. By employing different combinations of one or two rows of laser diodes in the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150, and by using different combinations of power in each of the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150, this embodiment can generate a variety of lighting systems 100 with different wattages to meet various usage requirements. By using different combinations of wattages for the first light-emitting unit 110, the second light-emitting unit 130, and the third light-emitting unit 150, different total wattages can be used to achieve the brightness requirements of different projection devices 200 within the same volume and architecture, thereby saving costs caused by architectural changes.

[0049] In summary, in the lighting system and projection device of the embodiments of the present invention, the lighting system includes: a first light-emitting unit, a first reflector, a second light-emitting unit, and a second reflector. The first light-emitting unit emits a first light beam; the first reflector reflects the first light beam in a first direction; the second light-emitting unit emits a second light beam; and the second reflector reflects the second light beam in the first direction. The first and second reflectors are arranged in a second direction, and when viewed from the second direction, the first and second reflectors are intersecting, wherein the second direction is perpendicular to the first direction. Because the intersecting first and second reflectors are used, the distribution range of the light spots formed by the first and second reflectors after reflecting the first and second light beams can be effectively reduced, making the light spots more concentrated and improving light efficiency. Furthermore, the distribution range of the light spots can be made more symmetrical, resulting in more uniform illumination, thereby improving the brightness uniformity of the image provided by the projection device.

[0050] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention. The scale in the schematic drawings does not represent the actual proportions of the components, in order to clearly describe the required parts.

[0051] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A lighting system, characterized in that, include: The first light-emitting unit is used to emit the first light beam; The first reflecting mirror is used to reflect the first beam of light in the first direction; The second light-emitting unit is used to emit a second beam of light; A second reflector is used to reflect the second beam of light toward the first direction, wherein the first reflector and the second reflector are arranged in a second direction, and when viewed from the second direction, the first reflector and the second reflector are intersecting, wherein the second direction is perpendicular to the first direction; The third light-emitting unit is used to emit a third beam of light; as well as A third reflector is used to reflect the third beam of light in the first direction, wherein the first reflector, the second reflector and the third reflector are arranged in the second direction, and the second reflector and the third reflector are intersecting when viewed from the second direction; The first reflector, the second reflector, and the third reflector are arranged on a reference axis parallel to the second direction. The first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other. The second light-emitting unit and the third light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other. The first light-emitting unit and the third light-emitting unit are arranged in the second direction.

2. The lighting system as described in claim 1, characterized in that, The first light-emitting unit includes multiple laser diodes, and the second light-emitting unit includes multiple laser diodes.

3. The lighting system as described in claim 1, characterized in that, The first reflector and the third reflector are arranged in parallel.

4. The lighting system as described in claim 1, characterized in that, The first light-emitting unit includes: The first substrate has a first side and a second side opposite to each other; A plurality of first pads are disposed on the first substrate and adjacent to the first edge; and A plurality of first laser diodes are disposed on the first substrate and offset toward the second side, and the third light-emitting unit includes: The second substrate has a third side and a fourth side opposite to each other; A plurality of second pads are disposed on the second substrate and adjacent to the third side; and Multiple second laser diodes are disposed on the second substrate and offset toward the fourth side; The second side is located between the first side and the fourth side, and the fourth side is located between the second side and the third side.

5. The lighting system as described in claim 4, characterized in that, The second light-emitting unit includes multiple third laser diodes positioned in the space between the second side and the fourth side.

6. The lighting system as claimed in claim 1, characterized in that, It also includes a beam splitting unit disposed on the transmission path of the excitation beam formed by the first beam from the first reflector, the second beam from the second reflector, and the third beam from the third reflector. The beam splitting unit is used to transmit a first portion of the excitation beam to a wavelength conversion material, which converts the first portion of the excitation beam into a converted beam that is transmitted back to the beam splitting unit. The beam splitting unit is used to transmit a second portion of the excitation beam to a diffuser, which reflects the second portion of the excitation beam back to the beam splitting unit. The beam splitting unit is used to combine the converted beam and the second portion of the excitation beam into an illumination beam.

7. The lighting system as claimed in claim 1, characterized in that, The first light-emitting unit and the second light-emitting unit include at least one row of laser diodes arranged along the second direction.

8. A projection device, characterized in that, include: Lighting system, including: The first light-emitting unit is used to emit the first light beam; The first reflecting mirror is used to reflect the first beam of light in the first direction; The second light-emitting unit is used to emit a second beam of light; and A second reflector is used to reflect the second beam of light in the first direction, wherein the first and second reflectors are aligned in a second direction, and when viewed from the second direction, the first and second reflectors are intersecting, wherein the second direction is perpendicular to the first direction. A light valve is configured on the transmission path of the first light beam from the first reflector and the second light beam from the second reflector to convert the first light beam and the second light beam into an image beam. The third light-emitting unit is used to emit a third beam of light; and A third reflector is used to reflect the third beam in the first direction, wherein the first reflector, the second reflector and the third reflector are arranged in the second direction, and when viewed from the second direction, the second reflector and the third reflector are intersecting. The light valve is disposed on the transmission path of the first beam from the first reflector, the second beam from the second reflector and the third beam from the third reflector, and the light valve converts the first beam, the second beam and the third beam into an image beam. The first reflector, the second reflector, and the third reflector are arranged on a reference axis parallel to the second direction. The first light-emitting unit and the second light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other. The second light-emitting unit and the third light-emitting unit are located on opposite sides of the reference axis but not directly opposite each other. The first light-emitting unit and the third light-emitting unit are arranged in the second direction.

9. The projection device as claimed in claim 8, characterized in that, The first light-emitting unit includes multiple laser diodes, and the second light-emitting unit includes multiple laser diodes.

10. The projection device as claimed in claim 8, characterized in that, The first reflector and the third reflector are arranged in parallel.

11. The projection device as claimed in claim 8, characterized in that, The first light-emitting unit includes: The first substrate has a first side and a second side opposite to each other; A plurality of first pads are disposed on the first substrate and adjacent to the first edge; and A plurality of first laser diodes are disposed on the first substrate and offset toward the second side, and the third light-emitting unit includes: The second substrate has a third side and a fourth side opposite to each other; A plurality of second pads are disposed on the second substrate and adjacent to the third side; and Multiple second laser diodes are disposed on the second substrate and offset toward the fourth side; The second side is located between the first side and the fourth side, and the fourth side is located between the second side and the third side.

12. The projection device as claimed in claim 11, characterized in that, The second light-emitting unit includes multiple third laser diodes positioned in the space between the second side and the fourth side.

13. The projection device as claimed in claim 8, characterized in that, The illumination system further includes a beam splitting unit disposed on the transmission path of the excitation beam formed by the first beam from the first reflector, the second beam from the second reflector, and the third beam from the third reflector. The beam splitting unit is used to transmit a first portion of the excitation beam to a wavelength conversion material, which converts the first portion of the excitation beam into a converted beam that is transmitted back to the beam splitting unit. The beam splitting unit is used to transmit a second portion of the excitation beam to a diffuser, which reflects the second portion of the excitation beam back to the beam splitting unit. The beam splitting unit is used to combine the converted beam and the second portion of the excitation beam into an illumination beam. A light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into the image beam.

14. The projection device as claimed in claim 8, characterized in that, The first light-emitting unit and the second light-emitting unit include at least one row of laser diodes arranged along the second direction.

Images