Light source system

Abstract

The application provides a light source system. The light source system comprises a wavelength conversion device, a light source assembly for emitting two excitation lights, two light path conversion regions on opposite sides of the wavelength conversion device, the light path conversion regions being capable of being excited by the excitation lights to generate excited lights or for reflecting the excitation lights and generating the excited lights, two light guiding assemblies on opposite sides of the wavelength conversion device, the light guiding assemblies being capable of transmitting the excitation lights emitted by the light source and reflecting the excited lights generated by the wavelength conversion device, or the light guiding assemblies being capable of transmitting the excitation lights emitted by the light source, reflecting the excited lights generated by the wavelength conversion device and reflecting the excitation lights reflected by the wavelength conversion device, and a reflecting assembly for making the excited lights and / or the excitation lights guided by the light guiding assemblies exit in the same direction. The technical scheme of the application solves the problem of low excitation efficiency caused by the excessively high unit power density of the wavelength conversion device in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a light source system. BACKGROUND

[0002] In the prior art, when the projector excites the fluorescent powder on the wavelength conversion device with high-efficiency blue excitation, the fluorescent powder is prone to have a temperature that is too high, and after the temperature is too high, the fluorescent powder is prone to saturation, which results in low efficiency of the light source system, and even the fluorescent powder is burned out. SUMMARY

[0003] The main purpose of the present application is to provide a light source system to solve the problem of low excitation efficiency caused by the unit power density of the wavelength conversion device being too high in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present application provides a light source system, comprising: a light source assembly comprising at least one light source; a wavelength conversion device comprising a substrate and two light path conversion regions located on opposite sides of the substrate, the light source assembly being configured to emit two excitation lights respectively entering the wavelength conversion device on opposite sides, and the light path conversion region being capable of being excited by the excitation light to generate excited light or being configured to reflect the excitation light and generate the excited light; two light guiding assemblies located on opposite sides of the wavelength conversion device, the light guiding assembly being configured to transmit the excitation light emitted by the light source and reflect the excited light generated by the wavelength conversion device, or the light guiding assembly being configured to transmit the excitation light emitted by the light source, reflect the excited light generated by the wavelength conversion device, and reflect the excitation light reflected by the wavelength conversion device; and a reflection assembly configured to make the excited light and / or the excitation light guided by the light guiding assembly exit in the same direction.

[0005] Further, the light source assembly comprises two light sources, the light guiding assembly is located between the light source and the wavelength conversion device, the light guiding assembly comprises a light splitting structure, the light splitting structure has a first region and a second region located on the periphery of the first region, the first region is configured to transmit the excitation light or the first region is configured to transmit the excitation light and the excited light generated by the wavelength conversion device, and the second region is configured to reflect the excited light generated by the wavelength conversion device.

[0006] Further, the light guiding assembly comprises: a light splitting structure, which is arranged obliquely relative to the wavelength conversion device, the light splitting structure has a first region and a second region located on the periphery of the first region, the first region is configured to transmit the excitation light or the first region is configured to transmit the excitation light and the excited light, and the second region is configured to transmit the excitation light and reflect the excited light; and a light splitting piece located on at least one side of the light splitting structure, the light splitting piece is configured to reflect the excitation light.

[0007] Further, the light splitting piece is arranged in a staggered manner with the first region, and the area of the light splitting piece is less than one third of the area of the light splitting structure.

[0008] Further, the reflection assembly comprises at least two light guiding structures, one of the at least two light guiding structures is used for reflecting the excitation light or the emitted light, another of the at least two light guiding structures comprises a third region and a fourth region located at the outer periphery of the third region, the third region is used for transmitting the excitation light and / or the emitted light, and the fourth region is used for reflecting the excitation light or the emitted light.

[0009] Further, the wavelength conversion device further comprises a light transmission region located at the inner side of the light path conversion region, the reflection assembly comprises at least two light guiding structures, the light guiding structures have reflecting surfaces for reflecting the emitted light or the excitation light, wherein the light rays reflected by one of the two light guiding assemblies are sequentially reflected by one of the two light guiding structures and transmitted by the light transmission region and then enter the reflecting surface of the other of the two light guiding structures.

[0010] Further, when the first region is used for transmitting the excitation light and the emitted light, the reflection assembly further comprises at least two reflecting structures located at the opposite sides of the wavelength conversion device, the at least two reflecting structures sequentially reflect the emitted light or the excitation light reflected by one of the two light splitting structures.

[0011] Further, the light path conversion region comprises the wavelength conversion region and a reflecting region for reflecting the excitation light, the reflecting region is arranged along the circumferential direction of the base relative to the wavelength conversion region; and / or, the light source system further comprises a color filtering region for filtering the emitted light or penetrating the excitation light.

[0012] Further, the wavelength conversion device is rotatably arranged relative to the light source, along the circumferential direction of the base, the light path conversion region comprises at least two wavelength conversion regions, the at least two wavelength conversion regions are used for exciting to generate at least two different colors of emitted light; or, along the radial direction of the base, the two wavelength conversion regions located at the two sides of the base are arranged in a staggered manner or at least partially overlap.

[0013] Further, the light source system further comprises a focusing assembly located in the propagation path of the excitation light and / or the emitted light, the focusing assembly comprises one or more lenses for converging light rays; or, the light source system further comprises a light homogenizing assembly located at one side of the wavelength conversion device, the emitted light or the excitation light is sequentially guided by the light guiding assembly and folded by the reflection assembly and then enters the light homogenizing assembly.

[0014] By applying the technical solution of this invention, the light source component emits two excitation beams that are respectively incident on opposite sides of the wavelength conversion device, causing the two optical path conversion areas on opposite sides of the wavelength conversion device to generate excited light. Furthermore, the reflection component enables the excited light and / or excitation light guided by the light guiding component to be emitted in the same direction. In this way, when light is combined, excited light can be generated on both opposite sides of the wavelength conversion device, thereby avoiding the efficiency saturation of the wavelength conversion device due to excessively high power density. This improves the excitation efficiency of the wavelength conversion device, thus solving the problem of low excitation efficiency in existing light source systems due to excessively high unit power density of the wavelength conversion device. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram of the light source system according to Embodiment 1 of the present invention is shown;

[0017] Figure 2 A schematic diagram of the light source system according to Embodiment 2 of the present invention is shown;

[0018] Figure 3 A schematic diagram of the light source system according to Embodiment 3 of the present invention is shown; and

[0019] Figure 4 A schematic diagram of the light source system according to Embodiment 4 of the present invention is shown.

[0020] The above figures include the following reference numerals:

[0021] 10. Light source; 30. Wavelength conversion device; 34. Light transmission area; 40. Light guiding component; 50. Reflection component; 43. Beam splitting structure; 431. First region; 432. Second region; 44. Beam splitter; 46. Reflection structure; 48. Light guiding structure; 481. Third region; 482. Fourth region; 61. Color filtering area; 71. Lens; 72. Light homogenizing component. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, in the embodiments of the present invention, as... Figure 1 As shown, the upper side and the lower side refer to the upper side and the lower side of the wavelength conversion device 30, respectively.

[0024] Example 1

[0025] like Figure 1 As shown, Embodiment 1 of the present invention provides a light source system. The light source system includes a light source assembly, a wavelength conversion device 30, two light guiding components 40, and a reflection component 50. The light source assembly includes at least one light source 10; the wavelength conversion device 30 includes a substrate and two optical path conversion regions located on opposite sides of the substrate; the light source assembly emits two beams of excitation light that are respectively incident on opposite sides of the wavelength conversion device 30; the optical path conversion regions can be excited by the excitation light to generate excited light or can reflect the excitation light and generate excited light; the two light guiding components 40 are located on opposite sides of the wavelength conversion device 30; the light guiding components 40 transmit the excitation light emitted by the light source 10 and reflect the excited light generated by the wavelength conversion device 30; the reflection component 50 is used to ensure that the excited light and / or the excitation light guided by the light guiding components 40 are emitted in the same direction.

[0026] In the above technical solution, the light source component emits two excitation beams that are respectively incident on opposite sides of the wavelength conversion device 30, causing the two optical path conversion areas on opposite sides of the wavelength conversion device 30 to generate excited light. Furthermore, the reflection component 50 enables the excited light and / or excitation light guided by the light guiding component 40 to be emitted in the same direction. In this way, when light is combined, excited light can be generated on both opposite sides of the wavelength conversion device 30, thereby avoiding the wavelength conversion device 30 from saturating due to excessively high power density. This improves the excitation efficiency of the wavelength conversion device 30, thus solving the problem of low excitation efficiency in the prior art light source system due to excessively high unit power density of the wavelength conversion device 30.

[0027] Furthermore, excitation light is generated from opposite sides of the wavelength conversion device 30, which reduces the temperature of each optical path conversion zone, thereby reducing the heat dissipation pressure of the wavelength conversion device 30 and preventing the optical path conversion zone from burning out. This allows the light source system to be suitable for high-power applications.

[0028] Furthermore, by setting optical path conversion areas on both sides of the wavelength conversion device 30, the size of the light source system can be reduced while achieving high luminous efficiency.

[0029] Preferably, in Embodiment 1 of the present invention, the light source 10 is a laser, and the emitted excitation light is blue laser or ultraviolet light. Optionally, the light source 10 may also be a blue LED.

[0030] Preferably, in Embodiment 1 of the present invention, the wavelength conversion device 30 is a reflective phosphor wheel, and phosphors are coated on opposite sides of the phosphor wheel to form a light path conversion region, so that the light path conversion region can generate fluorescence after being excited by a blue laser.

[0031] Preferably, in the first embodiment of the present application, the shape of the light path conversion region is a ring-shaped sector, and the width of the ring-shaped sector is about 2mm-5mm.

[0032] As shown in Figure 1 the first embodiment of the present application, the light source assembly includes two light sources 10, and a light guiding assembly 40 is located between the light sources 10 and the wavelength conversion device 30, and the light guiding assembly 40 includes a light splitting structure 43, and the light splitting structure 43 has a first region 431 for transmitting excitation light and a second region 432 located at the periphery of the first region 431 for reflecting excited light.

[0033] Through the above arrangement, the excitation light emitted by the two light sources 10 can be respectively transmitted into the opposite sides of the wavelength conversion device 30 through the two first regions 431, and then the two light path conversion regions of the wavelength conversion device 30 can generate excited light after being irradiated by the excitation light and reflect the excited light to the two second regions 432, and then the two beams of excited light can be reflected to the reflecting assembly 50 through the two second regions 432, and then the two beams of excited light can be emitted in the same direction after being combined by the reflecting assembly 50.

[0034] Preferably, in the first embodiment of the present application, the light splitting structure 43 is a light splitting plate for transmitting blue light and reflecting fluorescent light, so that the excitation light (blue light) can be transmitted through the first region 431, and the excited light (fluorescent light) can be reflected through the second region 432.

[0035] Preferably, in the first embodiment of the present application, the inclined directions of the two light splitting structures 43 are opposite, and the two light splitting structures 43 are both arranged towards the wavelength conversion device 30, so that the excited light generated by the wavelength conversion device 30 can be reflected.

[0036] Of course, in an alternative embodiment not shown in the drawings, the light source assembly can also only include one light source 10 capable of emitting two beams of excitation light, as long as the light source assembly can emit two beams of excitation light respectively into the opposite sides of the wavelength conversion device 30.

[0037] As shown in Figure 1 the first embodiment of the present application, the wavelength conversion device 30 further includes a light transmission region 34 located at the inner side of the light path conversion region, and the reflecting assembly 50 includes at least two light guiding structures 48, and the light guiding structure 48 has a reflecting surface for reflecting the excited light, and the light rays reflected by one of the two light splitting structures 43 are sequentially reflected by one of the two light guiding structures 48 and then transmitted through the light transmission region 34 to be incident on the reflecting surface of the other of the two light guiding structures 48.

[0038] Through the above arrangement, the two light guiding structures 48 and the light transmission region 34 can guide the excited light to be incident on the reflecting surface of the other of the two light guiding structures 48. Figure 1The excited light generated in the optical path conversion region located on the lower side is guided to... Figure 1 The excited light on the lower side of the mid-wavelength conversion device 30 is guided to the upper side of the wavelength conversion device 30, thereby... Figure 1 The stimulated light generated by the lower optical path conversion zone and the stimulated light generated by the upper optical path conversion zone can be emitted in the same direction, thereby improving the luminous efficiency of the light source system.

[0039] like Figure 1 As shown, in Embodiment 1 of the present invention, one of the at least two light guiding structures 48 is used to reflect excitation light or excited light, and the other light guiding structure 48 includes a third region 481 and a fourth region 482 located on the outer periphery of the third region 481. The third region 481 is used to transmit excited light, and the fourth region 482 is used to reflect excitation light or excited light.

[0040] With the above configuration, when the upper light guiding structure 48 is located on the optical path of the upper excited light, the third region 481 of the upper light guiding structure 48 can transmit the excited light reflected by the upper beam splitting structure 43, and the fourth region 482 of the upper light guiding structure 48 can reflect the excited light transmitted through the light transmission region 34. In this way, not only can the emission direction of the excited light generated by the lower optical path conversion region be changed, but the upper light guiding structure 48 can also be prevented from blocking the upper excited light, so that the upper excited light and the lower excited light can be emitted in the same direction.

[0041] Specifically, in Embodiment 1 of the present invention, the excitation light emitted by the upper light source 10 irradiates the upper optical path conversion area of ​​the wavelength conversion device 30 and generates excited light. Then, the excited light on the upper side is reflected by the upper beam splitting structure 43 and can be transmitted through the third region 481 of the upper light guiding structure 48. The excitation light emitted by the lower light source 10 irradiates the lower optical path conversion area of ​​the wavelength conversion device 30 and generates excited light. Then, the excited light on the lower side can be reflected by the lower beam splitting structure 43, reflected by the lower light guiding structure 48, transmitted through the light transmission area 34, and reflected by the fourth region 482 of the upper light guiding structure 48 in sequence, and emitted in the same direction as the excited light transmitted through the third region 481.

[0042] like Figure 1 As shown, in Embodiment 1 of the present invention, the wavelength conversion device 30 is rotatably disposed relative to the light source 10. Along the circumference of the substrate, the optical path conversion region includes at least two wavelength conversion regions, which are used to excite and generate at least two different colors of excited light.

[0043] With the above settings, the optical path conversion zone can generate at least two different colors of excited light, which is more advantageous for synthesizing white light.

[0044] Preferably, in the first embodiment of the present application, the light path conversion region comprises three color wavelength conversion regions, the first color wavelength conversion region can be provided with red fluorescent powder for generating red light or yellow fluorescent powder for generating yellow light, the second color wavelength conversion region can be provided with green fluorescent powder for generating green light, and the third color wavelength conversion region can be provided with blue fluorescent powder for generating blue light, so that the red, green and blue light of three colors can be combined to generate white light.

[0045] Of course, in alternative embodiments, the light path conversion region can also comprise a plurality of wavelength conversion regions, the plurality of wavelength conversion regions comprising a red fluorescent region, a green fluorescent region, a blue fluorescent region and a yellow fluorescent region arranged in sequence along the circumference (i.e. the wavelength conversion region is divided into RGBY four regions); or, the wavelength conversion region can also be divided into RGBYRGBY eight regions; or, it can also be divided into three regions or six regions, etc.

[0046] Of course, in alternative embodiments, the light path conversion region can also comprise a wavelength conversion region of one color, such as only yellow without other colors.

[0047] Preferably, in the first embodiment of the present application, the two wavelength conversion regions located on both sides of the substrate are arranged in a staggered manner along the radial direction of the substrate. In this way, the instantaneous temperature of the fluorescent powder when excited can be reduced.

[0048] Of course, in alternative embodiments, the two wavelength conversion regions located on both sides of the substrate can also at least partially overlap along the radial direction of the substrate.

[0049] As shown in FIG. 1, in the first embodiment of the present application, the light source system further comprises a color filtering region 61 for filtering the excited light or penetrating the excitation light. In this way, the color filtering region 61 can filter the fluorescent light after being combined by the reflecting assembly 50, so as to obtain bright colors. Figure 1 Preferably, in the first embodiment of the present application, the color filtering region 61 is located outside the light path conversion region along the radial direction of the substrate.

[0050] Preferably, in the first embodiment of the present application, the thickness of the color filtering region 61 can be equal to the thickness of the substrate, and the color filtering region 61 is parallel to the substrate. Of course, in alternative embodiments, the thickness of the color filtering region 61 can be less than the thickness of the substrate or greater than the thickness of the substrate; or, the color filtering region 61 can be arranged below the substrate or above the substrate.

[0051] Of course, in alternative embodiments not shown in the drawings, the color filtering region 61 can also be a color filter device separately provided and having a color filtering function; or, the color filtering region 61 can also not be provided.

[0052] Of course, in alternative embodiments not shown in the drawings, the color filtering region 61 can also be a color filter device separately provided and having a color filtering function; or, the color filtering region 61 can also not be provided.

[0053] Preferably, in Embodiment 1 of the present invention, the color filtering area 61 is a light filter. Of course, in alternative embodiments, the color filtering area 61 can also be formed by coating on a substrate.

[0054] Preferably, in Embodiment 1 of the present invention, the light source system includes a color filter area 61 of multiple colors, and the color filter area 61 of multiple colors is correspondingly set with a wavelength conversion area of ​​multiple colors, that is, the color filter area 61 can correspondingly filter the excited light generated by the wavelength conversion area with the same color as the color filter area 61.

[0055] Preferably, in Embodiment 1 of the present invention, the central angle corresponding to the color filtering area 61 is the same size as the central angle corresponding to the phosphor.

[0056] like Figure 1 As shown, in Embodiment 1 of the present invention, the light source system further includes a focusing component located on the propagation path of the excitation light and / or the excited light. The focusing component includes one or more lenses 71 for converging the light. This allows the excitation light or the excited light to be focused and shaped, thereby adjusting the size of the light spot so that the light spot can pass through the third region 481.

[0057] Specifically, in Embodiment 1 of the present invention, lenses 71 are provided in the optical path between the light source 10 and the beam splitting structure 43, in the optical path between the beam splitting structure 43 and the wavelength conversion device 30, and between the two light guiding structures 48 located on the upper side of the wavelength conversion device 30. This allows for better focusing of the light beam.

[0058] like Figure 1 As shown, in Embodiment 1 of the present invention, the light source system further includes a light homogenizing component 72 located on one side of the wavelength conversion device 30. The excited light is guided by the light guiding component 40 and refracted by the reflection component 50 before entering the light homogenizing component 72.

[0059] Through the above settings, Figure 1 The excited light generated by the light source 10 on the upper middle side and the light transmitted through Figure 1 The excited light generated by the light source 10 on the lower side can be jointly incident into the homogenizing component 72, and the homogenizing component can homogenize the excited light beam.

[0060] Preferably, in Embodiment 1 of the present invention, the light-diffusing component 72 includes a light bar, thereby enabling the light beam to be uniformly diffused. Of course, in alternative embodiments not shown in the accompanying drawings, the light-diffusing component 72 may also include a compound eye.

[0061] Specifically, in Embodiment 1 of the present invention, the reflective component 50 includes three tilted light guiding structures 48, wherein two light guiding structures 48 are located on opposite sides of the wavelength conversion device 30 and tilt in the same direction, and the third light guiding structure 48 is correspondingly arranged with the light homogenizing component 72, and the tilt direction of the third light guiding structure 48 is opposite to that of the other two light guiding structures 48, so that the two beams of excited light can be reflected into the light homogenizing component 72.

[0062] In Embodiment 1 of the present invention, the light-transmitting area 34 at the center of the wavelength conversion device 30 can transmit light, and the color filtering area 61 at the edge of the wavelength conversion device 30 can filter colors, thereby enabling more efficient light combining and reducing the size of the light source system.

[0063] Of course, in alternative embodiments, the light source system may further include a blue light source located on the light-incident side of the light-diffusing component 72. This way, when no reflective area or blue fluorescent area is provided on the phosphor wheel, the additional blue light source can provide blue light for light combining. Specifically, the additional blue light source and the light-diffusing component 72 may be located on... Figure 1 The light guiding structure 48 on the right side of the middle is located on opposite sides of the light guiding structure 48, and the light guiding structure 48 on the right side is used to transmit blue light and reflect fluorescence; or, an additional blue light source can be located at... Figure 1 Between the two optical guiding structures 48 on the upper side of the mid-wavelength conversion device 30, and Figure 2 The light-guiding structure 48 on the right side is used to reflect light.

[0064] The present invention also provides a projection device, which includes the above-described light source system. The projection device has all the advantages of the above-described light source system, which will not be repeated here.

[0065] Example 2

[0066] like Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 of the present invention is that:

[0067] In this second embodiment, the light source system does not have a light guiding structure 48, the wavelength conversion device 30 does not have a light-transmitting area 34, and the first area 431 is used to transmit excitation light and excited light. The reflection component 50 includes at least two reflection structures 46 located on opposite sides of the wavelength conversion device 30, and the at least two reflection structures 46 sequentially reflect the excited light reflected by one of the two beam-splitting structures 43.

[0068] Through the above arrangement, the excited light generated by the wavelength conversion region on the lower side of the wavelength conversion device 30 can pass from the outside of the wavelength conversion device 30 and be transmitted through the first region 431 of the light splitting structure 43 on the upper side and then be emitted in the same direction as the excited light generated by the wavelength conversion region on the upper side of the wavelength conversion device 30, so that the light combination is better.

[0069] Specifically, in the second embodiment of the present application, the two light splitting structures 43 have the same inclination direction, so that the excited light generated on the upper and lower sides can be emitted in opposite directions first.

[0070] Specifically, in the second embodiment of the present application, the reflection assembly 50 includes three reflection structures 46, two of which are located on the outside of the wavelength conversion device 30, the reflection structures 46 are arranged obliquely relative to the wavelength conversion device 30, and the reflection surfaces of the reflection structures 46 are arranged towards the wavelength conversion device 30, one of the two reflection structures 46 on the outside is opposite to the inclination direction of the light splitting structure 43, and the other of the two reflection structures 46 on the outside is the same as the inclination direction of the light splitting structure 43, so that the excited light generated by the wavelength conversion region on the lower side can be emitted in the same direction as the excited light generated by the wavelength conversion region on the upper side after being reflected by the two reflection structures 46 on the outside in turn; the third light splitting structure 43 of the three light splitting structures 43 is located in the same position as in the first embodiment, which will not be described here.

[0071] Preferably, in the second embodiment of the present application, the first region 431 of one of the two light splitting structures 43 is used to transmit the excitation light and the excited light, and the first region 431 of the other of the two light splitting structures 43 is used to transmit the excitation light and reflect the excited light, so that the excited light of the first region 431 of the other light splitting structure 43 can also be collected, thereby avoiding the loss of excited light.

[0072] It should be noted that, in the second embodiment of the present application, lenses 71 are arranged on the light paths between the reflection structures 46 and the light splitting structures 43 and on the light paths between the two reflection structures 46, so that the light spots of the excited light generated by the wavelength conversion region on the lower side of the wavelength conversion device 30 can be focused and reduced to the size of the first region 431, so as to be transmitted, thereby the excited light can be effectively utilized.

[0073] Preferably, in the second embodiment of the present application, the reflection structure 46 is a mirror.

[0074] The other structures of the second embodiment are the same as those of the first embodiment, which will not be described here.

[0075] Embodiment Three

[0076] As Figure 3As shown, the difference between Embodiment 3 and Embodiment 1 is that the optical path conversion region includes a wavelength conversion region and a reflection region for reflecting excitation light. The reflection region and the wavelength conversion region are arranged circumferentially along the substrate, and the light guiding component 40 includes a beam splitter 44 located on at least one side of the beam splitting structure 43.

[0077] In Embodiment 3, the beam splitting structure 43 is inclined relative to the wavelength conversion device 30. The beam splitting structure 43 has a first region 431 and a second region 432 located on the outer periphery of the first region 431. The first region 431 is used to transmit excitation light, and the second region 432 is used to transmit excitation light and reflect the excited light. The beam splitter 44 is located on at least one side of the beam splitting structure 43 and is used to reflect the excitation light.

[0078] With the above settings, the wavelength conversion device 30 can not only be excited to generate excited light, but also reflect the excitation light, so that the excitation light can be utilized. Furthermore, by setting the beam splitting structure 43 and beam splitting element 44, the excitation light can be guided so that the excitation light and the excited light can be emitted in the same direction, thereby enabling more effective light combination.

[0079] Specifically, in Embodiment 3 of the present invention, a beam splitter 44 is provided on the side of the beam splitter 43 away from the wavelength conversion device 30, so that the beam splitter 44 can reflect the excitation light transmitted through the beam splitter 43.

[0080] Preferably, in Embodiment 3 of the present invention, the beam splitting structure 43 and the beam splitter 44 can be integrally formed, that is, the film for reflecting blue light is deposited on one side of the beam splitting structure 43; or, the beam splitting structure 43 can also be separately set from the beam splitter 44, that is, a beam splitter or reflector that can reflect blue light is set on one side of the beam splitting structure 43.

[0081] like Figure 3 As shown, in Embodiment 3 of the present invention, the beam splitter 44 is staggered with the first region 431, and the area of ​​the beam splitter 44 is less than one-third of the area of ​​the beam splitting structure 43. That is, the beam splitter 44 is correspondingly arranged with the second region 432. In this way, the beam splitter 44 can reflect the excitation light that has been reflected by the optical path conversion area and transmitted through the second region 432 in sequence, and the beam splitter 44 can also avoid reflecting the excitation light that enters from the first region 431.

[0082] like Figure 3 As shown, in Embodiment 3 of the present invention, the light guiding structure 48 has a reflective surface for reflecting the excited light and the excitation light, and the third region 481 is used for transmitting the excitation light and the excited light. This allows for the refraction of the excitation light and the excited light to... Figure 3 The two excitation beams and the two excited beams are combined.

[0083] Preferably, in Embodiment 3 of the present invention, the optical path conversion region includes two wavelength conversion regions of different colors, and the color of the wavelength conversion region is different from the color of the excitation light. In this way, the excited light and the excitation light excited by the two wavelength conversion regions can synthesize white light. Specifically, the two wavelength conversion regions are yellow phosphor or orange phosphor or red phosphor used to generate red fluorescence, and green phosphor used to generate green fluorescence.

[0084] Of course, in alternative embodiments, the optical path conversion region may also include fluorescent regions (wavelength conversion regions) of three colors, namely red, green and blue, as needed.

[0085] Specifically, such as Figure 3 As shown, in Embodiment 3 of the present invention, the excitation light emitted by the light source 10 located on the upper side of the wavelength conversion device 30 irradiates the wavelength conversion region and the reflection region on the upper side of the wavelength conversion device 30. The excited light generated by the excitation in the upper wavelength conversion region and the excitation light reflected by the upper reflection region are together injected into the third region 481 of the upper light guiding structure 48. The excitation light emitted by the light source 10 located on the lower side of the wavelength conversion device 30 irradiates the wavelength conversion region and the reflection region on the lower side of the wavelength conversion device 30. The excited light generated by the excitation in the lower wavelength conversion region and the excitation light reflected by the lower reflection region are together injected into the lower light guiding structure 48. Then, the excitation light and the excited light on the lower side are reflected by the lower light guiding structure 48, transmitted by the light transmission region 34, and reflected by the upper light guiding structure 48 in sequence, and are emitted in the same direction as the excitation light and the excited light transmitted by the third region 481, until they are injected into the light homogenizing component 72.

[0086] Specifically, in Embodiment 3 of the present invention, located at Figure 4 The light guiding structure 48 on the right side (i.e., the light guiding structure 48 corresponding to the light incident side of the light homogenizing component 72) can reflect all light rays, that is, it can reflect both the excitation light and the excited light.

[0087] The other structures in this embodiment three are the same as those in embodiment one, and will not be described again here.

[0088] Example 4

[0089] like Figure 4As shown, the difference between the fourth embodiment of the present application and the third embodiment is that the light guiding structure 48 is not arranged in the light source system of the fourth embodiment, the light transmission region 34 is not arranged on the wavelength conversion device 30, and the first region 431 of the upper splitting structure 43 is used for transmitting the excitation light and the excited light, and the splitting member 44 is used for reflecting the excitation light. The reflecting assembly 50 comprises two reflecting structures 46 arranged outside the wavelength conversion device 30, and the two reflecting structures 46 are used for sequentially reflecting the excited light and the excitation light reflected by one of the two splitting structures 43, so that the excitation light and the excited light transmitted from the first region 431 of the upper splitting structure 43 are emitted in the same direction with the excitation light and the excited light generated by the upper light path conversion region.

[0090] Preferably, in the fourth embodiment of the present application, the splitting member 44 is a splitting film capable of reflecting blue light and coated on part of the splitting structure 43.

[0091] Specifically, in the fourth embodiment of the present application, the reflecting structure 46 arranged on the right side of the wavelength conversion device 30 (i.e. the reflecting structure 46 arranged corresponding to the light entrance side of the homogenizing assembly 72) is capable of reflecting all the light, i.e. the reflecting structure 46 is capable of reflecting the excitation light and the excited light. ​

[0092] The other structures of the fourth embodiment are the same as those of the third embodiment, and will not be described here.

[0093] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: the light source assembly emits two beams of excitation light respectively entering the opposite two sides of the wavelength conversion device, the two light path conversion regions on the opposite two sides of the wavelength conversion device generate excited light, and the reflecting assembly can make the excited light and / or the excitation light guided by the light guiding assembly emit in the same direction. In this way, in the case of combining light, the excited light can be generated on the opposite two sides of the wavelength conversion device, so as to avoid the saturation of the wavelength conversion device due to the excessively high power density of the wavelength conversion device, and thus the excitation efficiency of the wavelength conversion device can be improved. In this way, the problem of low excitation efficiency of the light source system in the prior art due to the excessively high unit power density of the wavelength conversion device is solved.

[0094] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. A light source system, characterized by, The light source system comprises: a light source assembly comprising at least one light source (10); a wavelength conversion device (30) comprising a substrate and two light path conversion regions located on opposite sides of the substrate, the light source assembly being configured to emit two beams of excitation light respectively into the two light path conversion regions on opposite sides of the wavelength conversion device (30), the light path conversion regions being capable of being excited by the excitation light to generate excited light or being configured to reflect the excitation light and generate the excited light, the light path conversion regions comprising a wavelength conversion region and a reflection region configured to reflect the excitation light, the excitation light emitted by the light source being blue laser light or ultraviolet light; two light guiding assemblies (40) located on opposite sides of the wavelength conversion device (30), the light guiding assemblies (40) being configured to transmit the excitation light emitted by the light source (10) and reflect the excited light generated by the wavelength conversion device (30), or the light guiding assemblies (40) being configured to transmit the excitation light emitted by the light source (10), reflect the excited light generated by the wavelength conversion device (30), and reflect the excitation light reflected by the wavelength conversion device (30); a reflection assembly (50) configured to cause the excited light and / or the excitation light guided by the light guiding assemblies (40) to be emitted in the same direction.

2. The light source system of claim 1, wherein The light source assembly comprises two light sources (10), the light guiding assemblies (40) are located between the light sources (10) and the wavelength conversion device (30), and the light guiding assemblies (40) comprise a light splitting structure (43) having a first region (431) and a second region (432) located on the periphery of the first region (431), the first region (431) being configured to transmit the excitation light or the first region (431) being configured to transmit the excitation light and the excited light generated by the wavelength conversion device (30), and the second region (432) being configured to reflect the excited light generated by the wavelength conversion device (30).

3. The light source system of claim 1, wherein The light guiding assemblies (40) comprise: a light splitting structure (43) arranged obliquely relative to the wavelength conversion device (30), the light splitting structure (43) having a first region (431) and a second region (432) located on the periphery of the first region (431), the first region (431) being configured to transmit the excitation light or the first region (431) being configured to transmit the excitation light and the excited light, and the second region (432) being configured to transmit the excitation light and reflect the excited light; a light splitting member (44) located on at least one side of the light splitting structure (43), the light splitting member (44) being configured to reflect the excitation light.

4. The light source system according to claim 3, wherein: the light splitting member (44) is arranged in a staggered manner with the first region (431), and the area of the light splitting member (44) is less than one third of the area of the light splitting structure (43).

5. The light source system of claim 1, wherein The reflection component (50) comprises at least two light guiding structures (48), one of the at least two light guiding structures (48) is used for reflecting the excitation light or the excited light, another of the at least two light guiding structures (48) comprises a third area (481) and a fourth area (482) located at the periphery of the third area (481), the third area (481) is used for transmitting the excitation light and / or the excited light, and the fourth area (482) is used for reflecting the excitation light or the excited light.

6. The light source system of claim 1, wherein, The wavelength conversion device (30) further comprises a light transmission area (34) located at the inner side of the light path conversion area, the reflection component (50) comprises at least two light guiding structures (48), the light guiding structures (48) have a reflecting surface for reflecting the excited light or the excitation light, wherein the light reflected by one of the two light guiding components (40) is sequentially reflected by one of the two light guiding structures (48) and transmitted by the light transmission area (34) and then enters the reflecting surface of another of the two light guiding structures (48).

7. The light source system of claim 2, wherein When the first area (431) is used for transmitting the excitation light and the excited light, the reflection component (50) further comprises at least two reflection structures (46) located at opposite sides of the wavelength conversion device (30), and the at least two reflection structures (46) sequentially reflect the excited light or the excitation light reflected by one of the two light splitting structures (43).

8. The light source system according to any one of claims 1 to 7, characterized in that, The reflection area and the wavelength conversion area are arranged along the circumference of the substrate; and / or, the light source system further comprises a color filtering area (61) for filtering the excited light or penetrating the excitation light.

9. The light source system according to any one of claims 1 to 7, characterized in that, The wavelength conversion device (30) is rotatably arranged relative to the light source (10), and along the circumference of the substrate, the light path conversion area comprises at least two wavelength conversion areas, and the at least two wavelength conversion areas are used for exciting to generate at least two different colors of the excited light; or, The light path conversion area comprises a wavelength conversion area, and along the radial direction of the substrate, two wavelength conversion areas located at both sides of the substrate are arranged in a staggered manner or at least partially overlap.

10. The light source system according to any one of claims 1 to 7, wherein The light source system further comprises a focusing component located in the propagation path of the excitation light and / or the excited light, and the focusing component comprises one or more lenses (71) for converging light; or The light source system further comprises a light homogenizing component (72) located at one side of the wavelength conversion device (30), and the excited light or the excitation light is sequentially guided by the light guiding component (40) and turned by the reflection component (50) and then enters the light homogenizing component (72).

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