Illumination system and projection device

Abstract

The invention provides an illumination system for providing an illumination beam and a projection device. The lighting system comprises a light source module, a lens module and a curved surface reflector. The light source module is used for generating light beams. The lens module is arranged on a transmission path of the light beam. The curved reflector is arranged on a transmission path of the light beam. The light beams are sequentially emitted from the light source module, penetrate through the lens module and are reflected by the curved surface reflector to form illumination light beams. The ratio of the effective focal length of the curved reflector to the effective focal length of the lens module is within the range of 1-3.

Description

Technical Field

[0001] The present invention relates to an optical system and an optical device, and in particular to an illumination system and a projection device. Background Art

[0002] Generally speaking, the illumination system used in a projection device is composed of light source module, focusing collimation module, light homogenization element, light guide module, etc. Among them, the illumination beam generated by the illumination system is converted into an image beam by the light valve, and the image beam is projected out of the projection device through the projection lens.

[0003] When the use environment requires the projection device to be reduced in size, such as a car-mounted projection device, the light valve and projection lens are not easily changed in design, so the only option is to change the internal design of the lighting system. However, simply reducing the number of components will only result in poor uniformity of the lighting beam, and thus the imaging effect of the projection device cannot meet the basic use requirements.

[0004] Therefore, it is necessary to design a novel lighting system and projection device to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide an illumination system and a projection device, which can achieve basic use requirements for imaging effects while reducing the volume of the system.

[0006] To achieve the above-mentioned purpose, the present invention provides a lighting system for providing a lighting beam, the lighting system comprising: a light source module for generating a light beam; a lens module arranged on the transmission path of the light beam; and a curved reflector arranged on the transmission path of the light beam; wherein the light beam is sequentially emitted from the light source module, penetrates the lens module and is reflected by the curved reflector to form the lighting beam; wherein the ratio between the effective focal length of the curved reflector and the effective focal length of the lens module falls within the range of 1 to 3.

[0007] Preferably, the illumination system includes two conjugate points in energy transfer from the light beam to the formation of the illumination beam.

[0008] Preferably, the light source module includes a surface light source or a light source array formed by a plurality of point light sources.

[0009] Preferably, a projection lens is further included, wherein the projection lens is disposed on the extended transmission path of the illumination light beam, and the aperture value (f value or f / #) of the projection lens falls within the range of 1 to 1.6.

[0010] Preferably, the reflecting surface of the curved reflector is an aspherical curved surface, a free-form curved surface, or a free-form curved surface having different refractive powers on different axes perpendicular to its optical axis.

[0011] Preferably, it also includes: a first reflector, which is arranged on the transmission path of the light beam and is arranged on one side of the optical axis with the optical axis of the lens module as the center and relative to the position of the curved reflector, wherein after the light beam emitted from the light source module penetrates the lens module, a part of the light beam is directly transmitted to the curved reflector, and another part of the light beam is transmitted to the first reflector, and then recovered by the first reflector and transmitted to the lens module, the light source module, the lens module and the curved reflector in sequence.

[0012] Preferably, the light source module includes an excitation light source, and the light beam is an excitation light beam.

[0013] Preferably, it further comprises: a second reflector disposed on the transmission path of the light beam; and a wavelength converter disposed on the transmission path of the light beam, wherein the second reflector is used to reflect the light beam emitted from the light source module to the wavelength converter.

[0014] Preferably, the wavelength converter includes at least one wavelength conversion region, the light beam is converted into at least one converted light beam by the at least one wavelength conversion region, and the at least one converted light beam transmitted to the curved reflector is reflected by the curved reflector to form the illumination light beam.

[0015] Preferably, the wavelength converter includes at least one wavelength conversion area and a non-wavelength conversion area, a portion of the light beam is converted into at least one converted light beam by the at least one wavelength conversion area, another portion of the light beam is reflected by the non-wavelength conversion area, and the at least one converted light beam and the other portion of the light beam transmitted to the curved reflector are reflected by the curved reflector to form the illumination light beam.

[0016] Preferably, the wavelength converter is a stationary part or a rotatable part.

[0017] Preferably, the light source module includes a plurality of light sources, and the plurality of light sources are respectively used to emit light of different wavelengths, and the plurality of lights of different wavelengths form the light beam.

[0018] Preferably, it also includes: a second reflector, which is arranged on the transmission path of the light beam; and a third reflector, which is arranged on the transmission path of the light beam, wherein the second reflector is used to reflect the light beam to the third reflector, and the third reflector is used to reflect the light beam to the curved reflector.

[0019] The present invention also provides a projection device, including an illumination system for providing an illumination beam, including: a light source module for generating a light beam; a lens module, arranged on the transmission path of the light beam; and a curved reflector, arranged on the transmission path of the light beam, wherein the light beam is sequentially emitted from the light source module, penetrates the lens module and is reflected by the curved reflector to form the illumination beam, wherein the ratio between the effective focal length of the curved reflector and the effective focal length of the lens module falls within the range of 1 to 3; a light valve, arranged on the transmission path of the illumination beam, for converting the illumination beam into an image beam; and a projection lens, arranged on the transmission path of the image beam, for projecting the image beam out of the projection device.

[0020] Preferably, the curved reflector and the lens module are respectively disposed on opposite sides of a central axis of the optically effective area of ​​the light valve.

[0021] Preferably, the curved reflector and the lens module are disposed on the same side of a central axis of the optically effective area of ​​the light valve.

[0022] Preferably, the illumination system includes two conjugate points in energy transfer from the light beam to the formation of the illumination beam.

[0023] Preferably, the light source module includes a surface light source or a light source array formed by a plurality of point light sources.

[0024] Preferably, the image beam is incident on the projection lens along a side of the optical axis of the projection lens close to the lens module, and the aperture value (f value or f / #) of the projection lens falls within the range of 1 to 1.6.

[0025] Preferably, the reflecting surface of the curved reflector is an aspherical curved surface, a free-form curved surface, or a free-form curved surface having different refractive powers on different axes perpendicular to its optical axis.

[0026] Preferably, it also includes: a first reflector, which is arranged on the transmission path of the light beam and is arranged on one side of the optical axis with the optical axis of the lens module as the center and relative to the position of the curved reflector, wherein after the light beam emitted from the light source module penetrates the lens module, a part of the light beam is directly transmitted to the curved reflector, and another part of the light beam is transmitted to the first reflector, and then recovered by the first reflector and transmitted to the lens module, the light source module, the lens module and the curved reflector in sequence.

[0027] Preferably, the light source module includes an excitation light source, and the light beam is an excitation light beam.

[0028] Preferably, it further comprises: a second reflector disposed on the transmission path of the light beam; and a wavelength converter disposed on the transmission path of the light beam, wherein the second reflector is used to reflect the light beam emitted from the light source module to the wavelength converter.

[0029] Preferably, the wavelength converter includes at least one wavelength conversion region, the light beam is converted into at least one converted light beam by the at least one wavelength conversion region, and the at least one converted light beam transmitted to the curved reflector is reflected by the curved reflector to form the illumination light beam.

[0030] Preferably, the wavelength converter includes at least one wavelength conversion area and a non-wavelength conversion area, a portion of the light beam is converted into at least one converted light beam by the at least one wavelength conversion area, another portion of the light beam is reflected by the non-wavelength conversion area, and the at least one converted light beam and the other portion of the light beam transmitted to the curved reflector are reflected by the curved reflector to form the illumination light beam.

[0031] Preferably, the wavelength converter is a stationary part or a rotatable part.

[0032] Preferably, the light source module includes a plurality of light sources, and the plurality of light sources are respectively used to emit light of different wavelengths, and the plurality of lights of different wavelengths form the light beam.

[0033] Preferably, it also includes: a second reflector, which is arranged on the transmission path of the light beam; and a third reflector, which is arranged on the transmission path of the light beam, wherein the second reflector is used to reflect the light beam to the third reflector, and the third reflector is used to reflect the light beam to the curved reflector.

[0034] Compared with the prior art, the embodiments of the present invention provide an illumination system and a projection device, wherein the illumination system includes a light source module, a lens module and a curved reflector. Therefore, the illumination system and the projection device using the illumination system are greatly reduced in size, realizing a minimized system, thereby improving the energy efficiency of the system. Furthermore, the ratio between the effective focal length of the curved reflector and the effective focal length of the lens module falls within the range of 1 to 3, which can effectively reduce the problem of poor light uniformity caused by simplifying the number of components in the system, thereby enabling the imaging effect to meet basic usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a projection device according to a first embodiment of the present invention.

[0036] Figure 2 is a schematic diagram of a projection device according to a second embodiment of the present invention.

[0037] Figure 3 is a schematic diagram of a projection device according to a third embodiment of the present invention.

[0038] Figure 4A is a schematic diagram of a projection device according to a fourth embodiment of the present invention.

[0039] Figure 4B yes Figure 4A Schematic diagram of the wavelength converter in FIG.

[0040] Figure 5 is a schematic diagram of a projection device according to a fifth embodiment of the present invention.

[0041] Figure 6 is a schematic diagram of a projection device according to a sixth embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0043] Figure 1 is a schematic diagram of a projection device according to a first embodiment of the present invention. Figure 1 One embodiment of the present invention provides a projection device 10, which includes an illumination system 100, a light valve 200, and a projection lens 300. The illumination system 100 is used to provide an illumination beam IL. The light valve 200 is disposed on the transmission path of the illumination beam IL to convert the illumination beam IL into an image beam IB. The projection lens 300 is disposed on the transmission path of the image beam IB, or in other words, the projection lens 300 is disposed on the extended transmission path of the illumination beam IL to project the image beam IB out of the projection device 10.

[0044] In this embodiment, the light valve 200 is, for example, a spatial light modulator such as a digital micro-mirror device (DMD), a liquid crystal on silicon panel (LCOS Panel), or a liquid crystal panel. In addition, the projection lens 300 is, for example, a combination of one or more optical lenses with diopter. The present invention does not limit the type and type of the projection lens 300.

[0045] In this embodiment, the lighting system 100 includes a light source module 110 , a lens module 120 and a curved reflector 130 .

[0046] In this embodiment, the light source module 110 is used to generate the light beam LB. The light source module 110 includes a surface light source or a light source array formed by a plurality of point light sources. The light source is, for example, a light-emitting diode (LED) light source, a laser diode (LD) or other suitable light sources.

[0047] In this embodiment, the lens module 120 is disposed on the transmission path of the light beam LB. The lens module 120, for example, includes a combination of one or more optical lenses with diopter. The present invention does not limit the type and form of the lens module 120.

[0048] In this embodiment, the curved reflector 130 is disposed on the transmission path of the light beam LB. The reflective surface 130S of the curved reflector 130 is an aspherical curved surface, a free-form curved surface, or a free-form curved surface having different diopters on different axes perpendicular to its optical axis. When the curved reflector 130 is designed to have different diopters on different axes, the light spot of the illumination light beam IL irradiated on the light valve 200 may have different sizes on different axes, and thus the light spot shape of the illumination light beam IL may be adjusted.

[0049] In this embodiment, the light beam LB is emitted from the light source module 110, passes through the lens module 120 and is reflected by the curved reflector 130 to form the illumination light beam IL. The ratio between the effective focal length of the curved reflector 130 and the effective focal length of the lens module 120 is within the range of 1-3.

[0050] In this embodiment, the illumination system 100 includes two conjugate points CP1 and CP2 in energy transfer from the light beam LB to the illumination light beam IL. The conjugate point CP1 may be an enlarged virtual image formed at infinity on the object side caused by the light source module 110 within the focal length of the lens module 120. The conjugate point CP2 may be a real image formed between the curved reflector 130 and the light valve 200.

[0051] In this embodiment, the curved reflector 130 and the lens module 120 are respectively disposed on opposite sides of the central axis 200C of the optical effective area of ​​the light valve 200. The image beam IB enters the projection lens 300 along the optical axis 300C of the projection lens 300 near the lens module 120.

[0052] In this embodiment, the aperture value (f-value or f / #) of the projection lens 300 falls within the range of 1 to 1.6.

[0053] Based on the above, in one embodiment of the present invention, the lighting system 100 includes a light source module 110, a lens module 120 and a curved reflector 130. Therefore, the lighting system 100 and the projection device 10 using the lighting system 100 are greatly reduced in size, thereby realizing a minimized system. Since the number of components of the system is simplified, the energy efficiency of the system is improved. Furthermore, the lighting system 100 is designed such that the ratio between the effective focal length of the curved reflector 130 and the effective focal length of the lens module 120 falls within the range of 1 to 3, which can effectively reduce the problem of poor light uniformity caused by simplifying the number of components of the system, thereby enabling the imaging effect to meet basic usage requirements.

[0054] In addition, in the embodiment of the present invention, a surface light source or a light source array formed by a plurality of point light sources is used, so that the light source module can emit a uniform light beam LB. Furthermore, the lighting system 100 is designed such that the aperture value (f value or f / #) of the projection lens 300 falls within the range of 1 to 1.6, which can improve the light collection effect of the system.

[0055] Figure 2 is a schematic diagram of a projection device according to a second embodiment of the present invention. Figure 2 , the projection device 10A, the lighting system 100A and Figure 1 The projection device 10A and the illumination system 100 are similar to each other, and the main difference is that: in this embodiment, the curved reflector 130 and the lens module 120 are respectively arranged on the same side of the central axis 200C of the optical effective area of ​​the light valve 200. Among them, the image light beam IB enters the projection lens 300 along the optical axis 300C of the projection lens 300 away from the side of the lens module 120. The advantages of the projection device 10A and the illumination system 100A are similar to those of the projection device 10 and the illumination system 100, and are not repeated here.

[0056] Figure 3 is a schematic diagram of a projection device according to a third embodiment of the present invention. Figure 3 , the projection device 10B, the lighting system 100B and Figure 1 The projection device 10 and the illumination system 100 are similar, and the main difference is that the illumination system 100B further includes a first reflector 140B. In the present embodiment, the first reflector 140B is arranged on the transmission path of the light beam LB, and is arranged on one side of the optical axis 120C of the lens module 120 with the optical axis 120C as the center relative to the curved reflector 130. After the light beam LB emitted from the light source module 110 penetrates the lens module 120, a part of the light beam LB is directly transmitted to the curved reflector 130, and another part of the light beam LB (for example, the light beam LB') is transmitted to the first reflector 140B, and then recovered by the first reflector 140B and transmitted to the lens module 120, the light source module 110, the lens module 120 (transmitted to the lens module 120 after being reflected by the light source module 110) and the curved reflector 130 in sequence.

[0057] Based on the above, in one embodiment of the present invention, since the projection device 10B and the lighting system 100B use the first reflector 140B to recover the edge light beam projected to the light valve 200, the dispersion phenomenon (i.e., purple fringing phenomenon) at the edge of the image caused by the large aperture lens used in the projection device 10B and the lighting system 100B can be reduced, thereby achieving a better imaging effect. The advantages of the projection device 10B and the lighting system 100B are similar to those of the projection device 10 and the lighting system 100, and are not described in detail here.

[0058] Figure 4A is a schematic diagram of a projection device according to a fourth embodiment of the present invention. Figure 4A , the projection device 10C, the illumination system 100C and Figure 1 The projection device 10 and the lighting system 100 are similar, and the main difference is that the light source module 110 includes an excitation light source 112C, and the light beam LB is an excitation light beam. In this embodiment, the lighting system 100C also includes a second reflector 150C and a wavelength converter 160C. The second reflector 150C is arranged on the transmission path of the light beam LB. The wavelength converter 160C is arranged on the transmission path of the light beam LB. The second reflector 150C is used to reflect the light beam LB emitted from the light source module 110 to the wavelength converter 160C. Among them, after being reflected by the second reflector 150C, the light beam LB passes through the lens module 120 and is then transmitted to the wavelength converter 160C.

[0059] Figure 4B yes Figure 4A Schematic diagram of the wavelength converter in . Please refer to Figure 4A and Figure 4B In this embodiment, the wavelength converter 160C includes at least one wavelength conversion region R1, R2, and R3. The light beam LB is converted into at least one converted light beam CB by at least one wavelength conversion region R1, R2, and R3. The converted light beam CB transmitted to the curved reflector 130 is reflected by the curved reflector 130 to form an illumination light beam IL. Among them, the wavelength conversion regions R1, R2, and R3 include, for example, a fluorescent layer, and the light beam LB is, for example, a blue light beam. After the light beam LB is irradiated by the wavelength conversion regions R1, R2, and R3, the wavelength conversion regions R1, R2, and R3 convert the light beam LB into fluorescent light. The converted light beam CB may be a yellow light beam, a green light beam, a red light beam, or a combination thereof. However, the present invention is not limited to which color light beams the light beam LB and the converted light beam CB are.

[0060] In this embodiment, the wavelength converter 160C further includes a non-wavelength conversion region R4. A portion of the light beam LB is converted into a converted light beam CB by the wavelength conversion regions R1, R2, and R3. Another portion of the light beam LB is reflected by the non-wavelength conversion region R4. The converted light beam CB transmitted to the curved reflector 130 and the other portion of the light beam LB are reflected by the curved reflector 130 to form an illumination light beam IL.

[0061] In this embodiment, the wavelength converter 160C can be a stationary part or a rotatable part. The rotatable part is, for example, a rotating wheel. When the wavelength converter 160C is selected as a rotatable part, the wavelength conversion areas R1, R2, R3 and the non-wavelength conversion area R4 can be designed to be switched to the transmission path of the light beam LB at different timings, so that the converted light beam CB and the other part of the light beam LB are transmitted to the curved reflector 130 and the light valve 200 at different timings.

[0062] Based on the above, in one embodiment of the present invention, the light source module 110 of the projection device 10C and the lighting system 100C includes an excitation light source 112C, and the light beam LB is an excitation light beam. Moreover, the projection device 10C and the lighting system 100C also include a wavelength converter 160C. Therefore, in addition to adjusting the size of the excitation light beam hitting the wavelength converter 160C, the brightness and uniformity of the illumination light beam IL and the image light beam IB can also be adjusted. The advantages of the projection device 10C and the lighting system 100C are similar to those of the projection device 10 and the lighting system 100, and will not be repeated here.

[0063] Figure 5 is a schematic diagram of a projection device according to a fifth embodiment of the present invention. Figure 5 , the projection device 10D, the illumination system 100D and Figure 1 The projection device 10 and the illumination system 100 are similar, and the main difference is that the light source module 110D includes a plurality of light sources LS1, LS2, and LS3. The light sources LS1, LS2, and LS3 are used to emit light L1, L2, and L3 of different wavelengths, respectively. The light L1, L2, and L3 of different wavelengths form a light beam LB.

[0064] Based on the above, in one embodiment of the present invention, the light source module 110D of the projection device 10D and the lighting system 100D includes a plurality of light sources LS1, LS2, and LS3, and the light sources LS1, LS2, and LS3 are used to emit light L1, L2, and L3 of different wavelengths, respectively. Therefore, the projection device 10D and the lighting system 100D can provide a colored image beam IB and an illumination beam IL. The advantages of the projection device 10D and the lighting system 100D are similar to those of the projection device 10 and the lighting system 100, and are not described in detail here.

[0065] Figure 6 is a schematic diagram of a projection device according to a sixth embodiment of the present invention. Figure 6 , the projection device 10E, the lighting system 100E and Figure 5The projection device 10D and the lighting system 100D are similar, and the main difference is that the lighting system 100D also includes a second reflector 150E and a third reflector 170E. The second reflector 150E is arranged on the transmission path of the light beam LB. The second reflector 150E or the third reflector 170E can be a fixed part or a rotatable part. The third reflector 170E is arranged on the transmission path of the light beam LB. The second reflector 150E is used to reflect the light beam LB to the third reflector 170E. The third reflector 170E is used to reflect the light beam LB to the curved reflector 130. Among them, after being reflected by the second reflector 150E, the light beam LB sequentially passes through the lens module 120, is reflected by the third reflector 170E, passes through the lens module 120, and is transmitted to the curved reflector 130. The advantages of the projection device 10E and the lighting system 100E are similar to those of the projection device 10D and the lighting system 100D, and are not repeated here.

[0066] In summary, an illumination system and a projection device are provided in an embodiment of the present invention. The illumination system is used to provide an illumination beam. The illumination system includes a light source module, a lens module and a curved reflector. The light source module is used to generate a light beam. The lens module is arranged on the transmission path of the light beam. The curved reflector is arranged on the transmission path of the light beam. The light beam is sequentially emitted from the light source module, penetrates the lens module and is reflected by the curved reflector to form an illumination beam. The ratio between the effective focal length of the curved reflector and the effective focal length of the lens module falls within the range of 1 to 3. Therefore, the illumination system and the projection device using the illumination system are greatly reduced in size, thereby realizing a minimized system. Since the number of components of the system is simplified, the energy efficiency of the system is improved. Furthermore, the illumination system is designed such that the ratio between the effective focal length of the curved reflector and the effective focal length of the lens module falls within the range of 1 to 3, which can effectively reduce the problem of poor light uniformity caused by the simplification of the number of components of the system, thereby enabling the imaging effect to meet the basic use requirements.

[0067] Although the present invention is described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present invention and should not be construed as limiting the present invention. In order to clearly describe the required components, the proportions in the schematic drawings do not represent the proportional relationship of the actual components.

[0068] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A lighting system for providing a lighting beam, characterized in that: The lighting system includes: A light source module for generating a light beam; A lens module is arranged on the transmission path of the light beam; and A curved reflector is arranged on the transmission path of the light beam; The light beam is emitted from the light source module, penetrates the lens module and is reflected by the curved reflector in sequence to form the illumination light beam; The ratio of the effective focal length of the curved reflector to the effective focal length of the lens module falls within the range of 1 to 3.

2. The lighting system according to claim 1, characterized in that The illumination system includes two conjugate points in energy transfer from the light beam to the formation of the illumination light beam.

3. The lighting system according to claim 1, characterized in that The light source module includes a surface light source or a light source array formed by a plurality of point light sources.

4. The lighting system according to claim 1, characterized in that The reflecting surface of the curved reflector is an aspherical curved surface, a free-form curved surface, or a free-form curved surface with different refractive powers on different axes perpendicular to the optical axis.

5. The lighting system according to claim 1, characterized in that Also includes: A first reflector is arranged on the transmission path of the light beam and is arranged on one side of the optical axis relative to the position of the curved reflector with the optical axis of the lens module as the center; After the light beam emitted from the light source module penetrates the lens module, a portion of the light beam is directly transmitted to the curved reflector, and another portion of the light beam is transmitted to the first reflector, and then recovered by the first reflector and transmitted to the lens module, the light source module, the lens module and the curved reflector in sequence.

6. The lighting system according to claim 1, characterized in that The light source module comprises an excitation light source, and the light beam is an excitation light beam.

7. The lighting system according to claim 6, characterized in that Also includes: A second reflector is arranged on the transmission path of the light beam; as well as A wavelength converter, arranged on a transmission path of the light beam; The second reflector is used to reflect the light beam emitted from the light source module to the wavelength converter.

8. The lighting system according to claim 7, characterized in that The wavelength converter includes at least one wavelength conversion area, and the light beam is converted into at least one converted light beam by the at least one wavelength conversion area. The at least one converted light beam transmitted to the curved reflector is reflected by the curved reflector to form the illumination light beam.

9. The lighting system according to claim 7, characterized in that The wavelength converter includes at least one wavelength conversion area and a non-wavelength conversion area. A portion of the light beam is converted into at least one converted light beam by the at least one wavelength conversion area, and another portion of the light beam is reflected by the non-wavelength conversion area. The at least one converted light beam transmitted to the curved reflector and the other portion of the light beam are reflected by the curved reflector to form the illumination light beam.

10. The lighting system according to claim 1, characterized in that The light source module includes a plurality of light sources, and the plurality of light sources are respectively used to emit light of different wavelengths, and the plurality of lights of different wavelengths form the light beam.

11. The lighting system according to claim 10, characterized in that Also includes: A second reflector is arranged on the transmission path of the light beam; as well as A third reflector is arranged on the transmission path of the light beam; The second reflector is used to reflect the light beam to the third reflector, and the third reflector is used to reflect the light beam to the curved reflector.

12. A projection device, characterized in that: include: The lighting system according to any one of claims 1 to 11; a light valve disposed on a transmission path of the illumination light beam and used for converting the illumination light beam into an image light beam; and The projection lens is arranged on the transmission path of the image light beam and is used for projecting the image light beam out of the projection device.

13. The projection device according to claim 12, characterized in that: The curved reflector and the lens module are respectively arranged on two opposite sides of the central axis of the optical effective area of ​​the light valve.

14. The projection device according to claim 12, wherein: The curved reflector and the lens module are arranged on the same side of the central axis of the optical effective area of ​​the light valve.

15. The projection device according to claim 12, characterized in that: The image light beam is incident on the projection lens along a side of the optical axis of the projection lens close to the lens module, and the aperture value of the projection lens falls within the range of 1 to 1.6.

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