CN116540480A - Light source system - Google Patents

Abstract

The invention provides a light source system. The light source system includes: the wavelength conversion device comprises a substrate and two light path conversion areas positioned on two opposite sides of the substrate, wherein the light source assembly is used for emitting two beams of excitation light, and the light path conversion areas can be excited by the excitation light to generate excited light or used for reflecting the excitation light and generating the excited light; the two light guide components are positioned at two opposite sides of the wavelength conversion device and used for transmitting the excitation light emitted by the light source and reflecting the excited light generated by the wavelength conversion device, or the light guide components are used for transmitting the excitation light emitted by the light source, reflecting the excited light generated by the wavelength conversion device and reflecting the excitation light reflected by the wavelength conversion device; and the reflecting component is used for enabling the excited light and/or the excitation light guided by the light guiding component to be emitted in the same direction. The technical scheme of the invention solves the problem of lower excitation efficiency of the light source system in the prior art caused by the over high unit power density of the wavelength conversion device.

Description

Light source system

Technical Field

The invention relates to the technical field of projection equipment, in particular to a light source system.

Background

In the prior art, when the projector excites the fluorescent powder on the wavelength conversion device by blue excitation with high efficiency, the fluorescent powder is easy to have overhigh temperature, and the problem of fluorescent powder saturation easily occurs after overhigh temperature, thus the efficiency of a light source system is smaller, and even the problem of fluorescent powder burning out occurs.

Disclosure of Invention

The main objective of the present invention is to provide a light source system, which solves the problem of low excitation efficiency caused by the high unit power density of the wavelength conversion device in the prior art.

In order to achieve the above object, the present invention provides a light source system comprising: a light source assembly including at least one light source; the wavelength conversion device comprises a substrate and two light path conversion areas positioned on two opposite sides of the substrate, wherein the light source assembly is used for emitting two beams of excitation light respectively entering two opposite sides of the wavelength conversion device, and the light path conversion areas can be excited by the excitation light to generate excited light or used for reflecting the excitation light and generating the excited light; the two light guide components are positioned at two opposite sides of the wavelength conversion device and used for transmitting the excitation light emitted by the light source and reflecting the excited light generated by the wavelength conversion device, or the light guide components are used for transmitting the excitation light emitted by the light source, reflecting the excited light generated by the wavelength conversion device and reflecting the excitation light reflected by the wavelength conversion device; and the reflecting component is used for enabling the excited light and/or the excitation light guided by the light guiding component to be emitted in the same direction.

Further, the light source assembly comprises two light sources, the light guiding assembly is located between the light sources and the wavelength conversion device, the light guiding assembly comprises a light splitting structure, the light splitting structure is provided with a first area and a second area, the second area is located on the periphery of the first area, the first area is used for transmitting excitation light or the first area is used for transmitting excitation light and excited light generated by the wavelength conversion device, and the second area is used for reflecting excited light generated by the wavelength conversion device.

Further, the light guiding assembly comprises: the light splitting structure is obliquely arranged relative to the wavelength conversion device and is provided with a first area and a second area, wherein the second area is positioned on the periphery of the first area, the first area is used for transmitting the excitation light or the first area is used for transmitting the excitation light and the excited light, and the second area is used for transmitting the excitation light and reflecting the excited light; the light splitting piece is positioned on at least one side of the light splitting structure and is used for reflecting excitation light.

Further, the light-splitting pieces and the first area are arranged in a staggered mode, and the area of the light-splitting pieces is less than or equal to one third of the area of the light-splitting structure.

Further, the reflective assembly comprises at least two light guiding structures, one of the at least two light guiding structures being for reflecting excitation light or excited light, the other of the at least two light guiding structures comprising a third region for transmitting excitation light and/or excited light and a fourth region located at the outer periphery of the third region, the fourth region being for reflecting excitation light or excited light.

Further, the wavelength conversion device further comprises a light transmission area positioned at the inner side of the light path conversion area, the reflection assembly comprises at least two light guide structures, the light guide structures are provided with reflection surfaces for reflecting excited light or exciting light, wherein light rays reflected by one of the two light guide assemblies are reflected by one of the two light guide structures in sequence, and the light rays are transmitted by the light transmission area and then enter the reflection surfaces of the other of the two light guide structures.

Further, when the first region is configured to transmit the excitation light and the excited light, the reflection assembly further includes at least two reflection structures located on opposite sides of the wavelength conversion device, and the at least two reflection structures sequentially reflect the excited light or the excitation light reflected by one of the two light splitting structures.

Further, the optical path conversion region includes a wavelength conversion region and a reflection region for reflecting the excitation light, the reflection region and the wavelength conversion region being arranged along a circumferential direction of the substrate; and/or the light source system further comprises a color filtering area for filtering or transmitting the excited light.

Further, the wavelength conversion device is rotatably arranged relative to the light source, and the light path conversion region comprises at least two wavelength conversion regions along the circumferential direction of the substrate, wherein the at least two wavelength conversion regions are used for exciting the excited light which generates at least two different colors; alternatively, the light path conversion region includes a wavelength conversion region, and two wavelength conversion regions located at two sides of the substrate are arranged in a staggered manner or at least partially coincide with each other along a radial direction of the substrate.

Further, the light source system also comprises a focusing assembly positioned on the propagation path of the excitation light and/or the excited light, and the focusing assembly comprises one or more lenses for converging light rays; or the light source system also comprises a light homogenizing component positioned at one side of the wavelength conversion device, and the excited light or the excited light is guided by the light guiding component and is reflected by the reflecting component and then enters the light homogenizing component.

By applying the technical scheme of the invention, the light source component emits two excitation lights respectively emitted into the two opposite sides of the wavelength conversion device, so that the two light path conversion areas on the two opposite sides of the wavelength conversion device generate excited lights, and the reflection component can emit the excited lights and/or the excitation lights guided by the light guide component in the same direction, so that the two opposite sides of the wavelength conversion device can generate the excited lights under the condition of light combination, thereby avoiding the saturation of the efficiency of the wavelength conversion device caused by the overhigh power density on the wavelength conversion device, further improving the excitation efficiency of the wavelength conversion device, and solving the problem of lower excitation efficiency caused by the overhigh unit power density of the wavelength conversion device in the light source system in the prior art.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows a schematic configuration of a light source system according to a first embodiment of the present invention;

fig. 2 is a schematic diagram showing the structure of a light source system according to a second embodiment of the present invention;

fig. 3 shows a schematic structure of a light source system according to a third embodiment of the present invention; and

fig. 4 shows a schematic structure of a light source system according to a fourth embodiment of the present invention.

Wherein the above figures include the following reference numerals:

10. a light source; 30. a wavelength conversion device; 34. a light transmission region; 40. a light guiding assembly; 50. a reflective assembly; 43. a light splitting structure; 431. a first region; 432. a second region; 44. a light splitting member; 46. a reflective structure; 48. a light guiding structure; 481. a third region; 482. a fourth region; 61. a color filtering area; 71. a lens; 72. and the light homogenizing component.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

In the embodiment of the present invention, as shown in fig. 1, the upper side and the lower side refer to the upper side and the lower side of the wavelength conversion device 30, respectively.

Example 1

As shown in fig. 1, a first embodiment of the present invention provides a light source system. The light source system comprises a light source assembly, a wavelength conversion device 30, two light guiding assemblies 40 and a reflecting assembly 50. Wherein the light source assembly comprises at least one light source 10; the wavelength conversion device 30 includes a substrate and two light path conversion regions located at opposite sides of the substrate, the light source assembly is configured to emit two excitation lights respectively entering opposite sides of the wavelength conversion device 30, and the light path conversion regions are capable of being excited by the excitation lights to generate excited lights or are configured to reflect the excitation lights and generate the excited lights; two light guiding components 40 are located at two opposite sides of the wavelength conversion device 30, and the light guiding components 40 are used for transmitting the excitation light emitted by the light source 10 and reflecting the excited light generated by the wavelength conversion device 30; the reflecting component 50 is used for making the excited light and/or the excited light guided by the light guiding component 40 emit in the same direction.

In the above technical solution, the light source assembly emits two excitation lights respectively entering opposite sides of the wavelength conversion device 30, so that two light path conversion regions on opposite sides of the wavelength conversion device 30 generate excited lights, and the reflection assembly 50 can make the excited lights and/or the excited lights guided by the light guiding assembly 40 emit in the same direction, so that under the condition of light combination, the opposite sides of the wavelength conversion device 30 can generate the excited lights, thereby avoiding saturation of efficiency of the wavelength conversion device 30 caused by over high power density on the wavelength conversion device 30, and further improving excitation efficiency of the wavelength conversion device 30, and solving the problem of low excitation efficiency caused by over high unit power density of the wavelength conversion device 30 in the light source system in the prior art.

Further, the excited light is excited from opposite sides of the wavelength conversion device 30, so that the temperature of each light path conversion region can be reduced, and the heat dissipation pressure of the wavelength conversion device 30 can be reduced, so that the light path conversion region is prevented from being burnt, and the light source system can be suitable for high-power conditions.

Further, by providing the light path conversion regions on opposite sides of the wavelength conversion device 30, the volume of the light source system can be reduced while achieving high light efficiency.

Preferably, in the first embodiment of the present invention, the light source 10 is a laser, and the emitted excitation light is blue laser or ultraviolet light. Alternatively, the light source 10 may be a blue LED.

Preferably, in the first embodiment of the present invention, the wavelength conversion device 30 is a reflective fluorescent wheel, and two opposite sides of the fluorescent wheel are coated with fluorescent powder to form an optical path conversion region, so that the optical path conversion region can generate fluorescence after being excited by blue laser.

Preferably, in the first embodiment of the present invention, the optical path conversion area is in the shape of an annular fan, and the width of the annular fan is about 2mm to 5mm.

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

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

Preferably, in the first embodiment of the present invention, the light-splitting structure 43 is a light-splitting sheet for transmitting blue light and reflecting fluorescence, so that the excitation light (blue light) can be transmitted through the first region 431, and the excited light (fluorescence) can be reflected through the second region 432.

Preferably, in the first embodiment of the present invention, the inclination directions of the two light splitting structures 43 are opposite, and both the two light splitting structures 43 are disposed towards the wavelength conversion device 30, so that the excited light generated by the wavelength conversion device 30 can be reflected.

Of course, in alternative embodiments not shown in the drawings, the light source assembly may also include only one light source 10 capable of emitting two beams of excitation light, provided that the light source assembly can emit two beams of excitation light that respectively enter opposite sides of the wavelength conversion device 30.

As shown in fig. 1, in the first embodiment of the present invention, the wavelength conversion device 30 further includes a light transmitting region 34 located inside the light path conversion region, the reflection assembly 50 includes at least two light guiding structures 48, the light guiding structures 48 have a reflecting surface for reflecting the excited light, wherein the light reflected by one of the two light splitting structures 43 is reflected by one of the two light guiding structures 48 in sequence, and the light transmitting region 34 transmits and then enters the reflecting surface of the other of the two light guiding structures 48.

By the above arrangement, the two light guiding structures 48 and the light transmitting region 34 can guide the excited light generated in the light path conversion region located at the lower side in fig. 1, and guide the excited light on the lower side of the wavelength conversion device 30 in fig. 1 to the upper side of the wavelength conversion device 30, so that the excited light generated in the light path conversion region located at the lower side in fig. 1 and the excited light generated in the light path conversion region located at the upper side can be emitted in the same direction, and thus the light efficiency of the light source system can be improved.

As shown in fig. 1, in the first embodiment of the present invention, one light guiding structure 48 of at least two light guiding structures 48 is used for reflecting excitation light or excited light, and the other light guiding structure 48 of at least two light guiding structures 48 includes a third region 481 and a fourth region 482 located at the outer periphery of the third region 481, the third region 481 is used for transmitting excited light, and the fourth region 482 is used for reflecting excitation light or excited light.

With the above arrangement, when the upper light guiding structure 48 is located on the light 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 light splitting structure 43, and the fourth region 482 of the upper light guiding structure 48 can reflect the excited light transmitted by the light transmitting region 34, so that not only can the emitting direction of the excited light generated by the lower light path conversion region be changed, but also the upper light guiding structure 48 can be prevented from blocking the upper excited light, and the upper excited light and the lower excited light can be emitted in the same direction.

Specifically, in the first embodiment of the present invention, the excitation light emitted by the upper light source 10 irradiates the upper light path conversion region of the wavelength conversion device 30 and generates the excited light, and then the excited light on the upper side is reflected by the upper light splitting structure 43 and can be transmitted through the third region 481 of the upper light guiding structure 48; the excitation light emitted from the lower light source 10 irradiates the lower light path conversion region of the wavelength conversion device 30 and generates excited light, and then the excited light on the lower side can be sequentially reflected by the lower light splitting structure 43, reflected by the lower light guiding structure 48, transmitted by the light transmitting region 34, and reflected by the fourth region 482 of the upper light guiding structure 48, and then emitted in the same direction as the excited light transmitted by the third region 481.

As shown in fig. 1, in the first embodiment of the present invention, the wavelength conversion device 30 is rotatably disposed relative to the light source 10, and the light path conversion region includes at least two wavelength conversion regions along the circumferential direction of the substrate, and the at least two wavelength conversion regions are used for exciting the excited light to generate at least two different colors.

By the arrangement, the light path conversion region can generate excited light of at least two different colors, so that the white light can be more effectively synthesized.

Preferably, in the first embodiment of the present invention, the light path conversion region includes three color wavelength conversion regions, the first wavelength conversion region may be configured as a red phosphor or a color phosphor for generating red light, the second wavelength conversion region may be configured as a green phosphor for generating green light, and the third wavelength conversion region may be configured as a blue phosphor for generating blue light, so that light of three colors of red, green and blue may be combined into white light.

Of course, in an alternative embodiment, the optical path conversion region may also include a plurality of wavelength conversion regions, where the plurality of wavelength conversion regions includes a red fluorescent region, a green fluorescent region, a blue fluorescent region, and a yellow fluorescent region sequentially disposed along the circumferential direction (i.e., the wavelength conversion region is divided into four regions RGBY); alternatively, the wavelength conversion region may be divided into eight regions of RGBYRGBY; alternatively, it may be divided into three or six zones, etc.

Of course, in alternative embodiments, the light path conversion region may also include a wavelength conversion region of one color, such as yellow only, with no remaining colors.

Preferably, in the first embodiment of the present invention, two wavelength conversion regions located on two sides of the substrate are arranged in a dislocation manner along the radial direction of the substrate. This reduces the instantaneous temperature of the phosphor when excited.

Of course, in alternative embodiments, the two wavelength converting regions located on opposite sides of the substrate may also at least partially coincide in the radial direction of the substrate.

As shown in fig. 1, in the first embodiment of the present invention, the light source system further includes a color filtering area 61 for filtering or transmitting the excited light. The color filter 61 can filter the fluorescence after the light is combined by the reflecting component 50, so as to obtain vivid color.

Preferably, in the first embodiment of the present invention, the color filter region 61 is located outside the light path conversion region in the radial direction of the substrate.

Preferably, in the first embodiment of the present invention, the thickness of the color filter region 61 may be equal to the thickness of the substrate, and the color filter region 61 is parallel to the substrate. Of course, in alternative embodiments, the thickness of the color filter region 61 may be less than the thickness of the substrate or greater than the thickness of the substrate; alternatively, the color filter region 61 may be disposed below the substrate or above the substrate.

Of course, in alternative embodiments not shown in the drawings, the color filter area 61 may also be a color filter device provided separately and having a color filter function; alternatively, the color filter area 61 may not be provided.

Preferably, in the first embodiment of the present invention, the color filter region 61 is a filter. Of course, in alternative embodiments, the color filter region 61 may also be formed by plating a film on the substrate.

Preferably, in the first embodiment of the present invention, the light source system includes a plurality of color filter regions 61, and the plurality of color filter regions 61 are disposed corresponding to the plurality of color wavelength conversion regions, that is, the color filter regions 61 may correspondingly filter the excited light generated by the wavelength conversion regions corresponding to the colors of the color filter regions 61.

Preferably, in the first embodiment of the present invention, the central angle corresponding to the color filter 61 is the same as the central angle corresponding to the phosphor.

As shown in fig. 1, in the first embodiment of the present invention, the light source system further includes a focusing assembly disposed on a propagation path of the excitation light and/or the excited light, and the focusing assembly includes one or more lenses 71 for converging light. Thus, the excitation light or the excited light can be focused and shaped, so that the size of the light spot can be adjusted, and the light spot can penetrate the third region 481.

Specifically, in the first embodiment of the present invention, the lens 71 is disposed on the optical path between the light source 10 and the light splitting structure 43, on the optical path between the light 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 a better focusing of the light beam.

As shown in fig. 1, in the first embodiment of the present invention, the light source system further includes a light homogenizing component 72 located at one side of the wavelength conversion device 30, and the excited light is sequentially guided by the light guiding component 40 and deflected by the reflecting component 50 and then enters the light homogenizing component 72.

With the above arrangement, the excited light excited by the light source 10 on the upper side in fig. 1 and the excited light excited by the light source 10 on the lower side in fig. 1 can be commonly incident into the dodging component 72, and the dodging component can dodging the excited light beam.

Preferably, in the first embodiment of the present invention, the light uniformizing unit 72 includes a light rod so that light can be uniformized. Of course, in alternative embodiments not shown in the figures, the light homogenizing component 72 may also include compound eyes.

Specifically, in the first embodiment of the present invention, the reflection assembly 50 includes three obliquely arranged light guiding structures 48, wherein two light guiding structures 48 are respectively located at two opposite sides of the wavelength conversion device 30 and have the same oblique directions, a third light guiding structure 48 is disposed corresponding to the light homogenizing assembly 72, and the oblique directions of the third light guiding structure 48 and the other two light guiding structures 48 are opposite, so that two beams of excited light can be reflected into the light homogenizing assembly 72.

The light-transmitting region 34 in the center of the wavelength conversion device 30 according to the first embodiment of the present invention can transmit light, and the color filtering region 61 at the edge of the wavelength conversion device 30 can filter color, so that more efficient light combination can be performed, and the volume of the light source system can be reduced.

Of course, in alternative embodiments, the light source system may further include a light source for emitting blue light on the light-incident side of the light homogenizing component 72, so that when no reflective area or blue fluorescent area is provided on the fluorescent wheel, an additionally provided blue light source may provide blue light for light combination. Specifically, the additionally provided blue light source and light homogenizing component 72 may be respectively located at opposite sides of the right light guiding structure 48 in fig. 1, and the right light guiding structure 48 is used for transmitting blue light reflection fluorescence; alternatively, an additionally provided blue light source may be located between the two light guiding structures 48 on the upper side of the wavelength converting device 30 in fig. 1, and the light guiding structure 48 on the right side in fig. 1 is used to reflect light.

The invention also provides a projection device, which comprises the light source system, and the projection device has all the advantages of the light source system and is not repeated herein.

Example two

As shown in fig. 2, the second embodiment of the present invention is different from the first embodiment in that:

in the second embodiment, the light guiding structure 48 is not disposed in the light source system, the light transmitting region 34 is not disposed on the wavelength conversion device 30, and the first region 431 is used for transmitting the excitation light and the excited light. The reflection assembly 50 comprises at least two reflection structures 46 located on opposite sides of the wavelength conversion device 30, the at least two reflection structures 46 in turn reflecting the excited light reflected by one of the two light splitting structures 43.

With the above arrangement, the excited light generated by excitation in the wavelength conversion region on the lower side of the wavelength conversion device 30 can pass through the outside of the wavelength conversion device 30, and is emitted in the same direction as the excited light generated by excitation in the wavelength conversion region on the upper side of the wavelength conversion device 30 after being transmitted through the first region 431 of the upper light splitting structure 43, thereby better combining the light.

Specifically, in the second embodiment of the present invention, the inclination directions of the two light splitting structures 43 are the same, so that the excited light generated on the upper and lower sides can be emitted in opposite directions.

Specifically, in the second embodiment of the present invention, the reflection assembly 50 includes three reflection structures 46, wherein two reflection structures 46 are located at the outer side of the wavelength conversion device 30, the reflection structures 46 are obliquely disposed with respect to the wavelength conversion device 30, and the reflection surfaces of the reflection structures 46 are disposed towards the wavelength conversion device 30, one reflection structure 46 of the two reflection structures 46 located at the outer side is opposite to the oblique direction of the light splitting structure 43, and the other reflection structure 46 of the two reflection structures 46 located at the outer side is identical to the oblique direction of the light splitting structure 43, so that the excited light generated in the lower wavelength conversion region can be emitted in the same direction as the excited light generated in the upper wavelength conversion region after being sequentially reflected by the two reflection structures 46 located at the outer side; the position of the third light splitting structure 43 in the three light splitting structures 43 is the same as that in the first embodiment, and will not be described here again.

Preferably, in the second embodiment of the present invention, the first region 431 of one of the two light-splitting structures 43 is used for transmitting the excitation light and the excited light, and the first region 431 of the other of the two light-splitting structures 43 is used for transmitting the excitation light and reflecting the excited light, so that the excited light of the first region 431 of the other light-splitting structure 43 can be collected, and thus the loss of the excited light can be avoided.

In the second embodiment of the present invention, the lens 71 is disposed on the optical path between the reflecting structure 46 and the light splitting structure 43 and on the optical path between the reflecting structures 46, so that the spot of the excited light excited by the wavelength conversion region at 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 by the excited light, and thus the excited light can be effectively utilized.

Preferably, in the second embodiment of the present invention, the reflecting structure 46 is a mirror.

Other structures of the second embodiment are the same as those of the first embodiment, and will not be described here again.

Example III

As shown in fig. 3, the third embodiment of the present invention is different from the first embodiment in that the light path conversion region includes a wavelength conversion region and a reflection region for reflecting the excitation light, the reflection region and the wavelength conversion region are arranged along the circumferential direction of the substrate, and the light guiding component 40 includes a light splitting member 44 located on at least one side of the light splitting structure 43.

In the third embodiment, the light-splitting structure 43 is disposed obliquely with respect to the wavelength conversion device 30, and the light-splitting structure 43 has a first region 431 and a second region 432 located at the outer periphery of the first region 431, the first region 431 is used for transmitting the excitation light, and the second region 432 is used for transmitting the excitation light and reflecting the excited light; the light-splitting member 44 is located on at least one side of the light-splitting structure 43, and the light-splitting member 44 is configured to reflect the excitation light.

With the above arrangement, the wavelength conversion device 30 can not only be excited to generate excited light, but also reflect the excited light, so that the excited light can be utilized, and the excited light can be guided by providing the light splitting structure 43 and the light splitting member 44, so that the excited light and the excited light can be emitted in the same direction, and thus light combination can be performed more effectively.

Specifically, in the third embodiment of the present invention, the side of the light-splitting structure 43 facing away from the wavelength conversion device 30 is provided with the light-splitting member 44, so that the light-splitting member 44 can reflect the excitation light transmitted through the light-splitting structure 43.

Preferably, in the third embodiment of the present invention, the light splitting structure 43 and the light splitting member 44 may be integrally formed, that is, a film for reflecting blue light is plated on one side of the light splitting structure 43; alternatively, the light-splitting structure 43 may be provided separately from the light-splitting member 44, that is, a light-splitting sheet or a mirror that can reflect blue light may be provided on one side of the light-splitting structure 43.

As shown in fig. 3, in the third embodiment of the present invention, the light-splitting element 44 is arranged offset from the first region 431, and the area of the light-splitting element 44 is less than or equal to one third of the area of the light-splitting structure 43. That is, the light-splitting member 44 is disposed corresponding to the second region 432, so that the light-splitting member 44 can reflect the excitation light sequentially reflected by the light path conversion region and transmitted by the second region 432, and the light-splitting member 44 can be prevented from reflecting the excitation light incident from the first region 431.

As shown in fig. 3, in the third embodiment of the present invention, the light guiding structure 48 has a reflecting 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, so that the excitation light and the excited light can be turned over, so that the two excitation light beams and the two excited light beams in fig. 3 are combined.

Preferably, in the third embodiment of the present invention, the light path conversion region includes two wavelength conversion regions of different colors, and the colors of the wavelength conversion regions are different from those of the excitation light, so that 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 respectively yellow phosphor or orange phosphor or red phosphor for generating red fluorescence, and green phosphor for generating green fluorescence.

Of course, in alternative embodiments, the light path conversion region may also include fluorescent regions (wavelength conversion regions) of three colors of red, green, and blue, as desired.

Specifically, as shown in fig. 3, in the third embodiment of the present invention, the excitation light emitted from the light source 10 located at the upper side of the wavelength conversion device 30 irradiates the upper side wavelength conversion region and the reflection region of the wavelength conversion device 30, and the excitation light generated by excitation in the upper side wavelength conversion region and the excitation light reflected by the reflection region at the upper side are incident on the third region 481 of the light guiding structure 48 at the upper side; the light source 10 located at the lower side of the wavelength conversion device 30 emits excitation light to the wavelength conversion region and the reflection region at the lower side of the wavelength conversion device 30, the excited light generated by excitation in the wavelength conversion region at the lower side and the excitation light reflected by the reflection region at the lower side are incident on the light guiding structure 48 at the lower side, and then the excited light and the excitation light at the lower side are reflected by the light guiding structure 48 at the lower side, transmitted by the light transmitting region 34, and reflected by the light guiding structure 48 at the upper side, and then emitted in the same direction as the excited light and the excitation light transmitted by the third region 481 until being incident on the light homogenizing component 72.

Specifically, in the third embodiment of the present invention, the light guiding structure 48 located on the right side in fig. 3 (i.e., the light guiding structure 48 disposed corresponding to the light incident side of the light uniformizing module 72) is capable of reflecting all light rays, i.e., the excitation light and the excited light.

Other structures of the third embodiment are the same as those of the first embodiment, and will not be described here again.

Example IV

As shown in fig. 4, the fourth embodiment of the present invention is different from the third embodiment in that the light source system of the fourth embodiment is not provided with the light guiding structure 48, the wavelength conversion device 30 is not provided with the light transmitting region 34, and the first region 431 of the light splitting structure 43 located at the upper side is used for transmitting the excitation light and the excited light, and the light splitting member 44 is used for reflecting the excitation light. The reflection assembly 50 includes two reflection structures 46 located at the outer side of the wavelength conversion device 30, and the two reflection structures 46 sequentially reflect the excited light and the excitation light reflected by one of the two light splitting structures 43, so that the excitation light and the excitation light emitted from the first region 431 of the upper light splitting structure 43 are emitted in the same direction as the excitation light and the excitation light generated from the upper light path conversion region after being transmitted through the first region 431 of the upper light splitting structure 43.

Preferably, in the fourth embodiment of the present invention, the light-splitting member 44 is a light-splitting film capable of reflecting blue light, which is plated on a part of the light-splitting structure 43.

Specifically, in the fourth embodiment of the present invention, the reflecting structure 46 located on the right side in fig. 4 (i.e., the reflecting structure 46 disposed corresponding to the light incident side of the light homogenizing module 72 is capable of reflecting all light rays, i.e., the excited light and the excited light.

Other structures of the fourth embodiment are the same as those of the third embodiment, and will not be described here again.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the light source component emits two excitation lights which are respectively emitted into two opposite sides of the wavelength conversion device, so that the two light path conversion areas on the two opposite sides of the wavelength conversion device generate excited lights, and the reflection component can emit the excited lights and/or the excited lights guided by the light guide component in the same direction, so that the two opposite sides of the wavelength conversion device can generate the excited lights under the condition of light combination, thereby avoiding the saturation of the efficiency of the wavelength conversion device caused by the overhigh power density on the wavelength conversion device, further improving the excitation efficiency of the wavelength conversion device, and solving the problem of lower excitation efficiency caused by the overhigh unit power density of the wavelength conversion device in the light source system in the prior art.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A light source system, comprising:

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 on opposite sides of the substrate, the light source assembly being configured to emit two excitation light beams respectively entering 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 to generate excited light;

two light guiding assemblies (40) located at opposite sides of the wavelength conversion device (30), wherein the light guiding assemblies (40) are used for transmitting the excitation light emitted by the light source (10) and reflecting the excited light generated by the wavelength conversion device (30), or the light guiding assemblies (40) are used for transmitting the excitation light emitted by the light source (10), reflecting the excited light generated by the wavelength conversion device (30) and reflecting the excitation light reflected by the wavelength conversion device (30);

and a reflecting component (50) for making the excited light and/or the excitation light guided by the light guiding component (40) emit in the same direction.

2. The light source system according to claim 1, wherein the light source assembly comprises two light sources (10), the light guiding assembly (40) is located between the light sources (10) and the wavelength converting device (30), the light guiding assembly (40) comprises a light splitting structure (43), the light splitting structure (43) has a first region (431) and a second region (432) located at the periphery of the first region (431), the first region (431) is used for transmitting the excitation light or the first region (431) is used for transmitting the excitation light and the excited light generated by the wavelength converting device (30), and the second region (432) is used for reflecting the excited light generated by the wavelength converting device (30).

3. The light source system according to claim 1, wherein the light guiding assembly (40) comprises:

a light-splitting structure (43) disposed obliquely with respect to the wavelength conversion device (30), the light-splitting structure (43) having a first region (431) and a second region (432) located at an outer 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, the second region (432) being configured to transmit the excitation light and reflect the excited light;

and the light splitting piece (44) is positioned on at least one side of the light splitting structure (43), and the light splitting piece (44) is used for reflecting the excitation light.

4. A light source system as recited in claim 3, wherein,

the light splitting pieces (44) and the first area (431) are arranged in a staggered mode, and the area of the light splitting pieces (44) is less than or equal to one third of the area of the light splitting structure (43).

5. The light source system according to claim 1, wherein the reflective assembly (50) comprises at least two light guiding structures (48), one (48) of the at least two light guiding structures (48) being adapted to reflect the excitation light or the excited light, the other (48) of the at least two light guiding structures (48) comprising a third region (481) and a fourth region (482) located at an outer periphery of the third region (481), the third region (481) being adapted to transmit the excitation light and/or the excited light, the fourth region (482) being adapted to reflect the excitation light or the excited light.

6. The light source system according to claim 1, wherein the wavelength conversion device (30) further comprises a light transmitting region (34) located inside the light path conversion region, the reflection assembly (50) comprises at least two light guiding structures (48), the light guiding structures (48) having a reflecting surface for reflecting the excited light or the excitation light, wherein light reflected by one of the two light guiding assemblies (40) is reflected by one of the two light guiding structures (48) in sequence, and the light transmitting region (34) is transmitted and then enters the reflecting surface of the other of the two light guiding structures (48).

7. The light source system according to claim 2, wherein when the first region (431) is configured to transmit the excitation light and the excited light, the reflecting assembly (50) further comprises at least two reflecting structures (46) located on opposite sides of the wavelength converting device (30), at least two of the reflecting structures (46) reflecting the excited light or the excitation light reflected by one of the two light splitting structures (43) in sequence.

8. The light source system according to any one of claims 1 to 7, wherein the light path conversion region includes a wavelength conversion region and a reflection region for reflecting the excitation light, the reflection region and the wavelength conversion region being arranged along a circumferential direction of the substrate; and/or the light source system further comprises a color filter area (61) for filtering or transmitting the excited light.

9. A light source system according to any one of claims 1 to 7, characterized in that the wavelength converting means (30) is rotatably arranged with respect to the light source (10), the light path converting region comprising at least two wavelength converting regions along the circumference of the substrate, at least two wavelength converting regions for exciting the excited light generating at least two different colors; or alternatively, the process may be performed,

the light path conversion region comprises a wavelength conversion region, and the two wavelength conversion regions positioned at two sides of the substrate are arranged in a staggered manner or at least partially overlapped along the radial direction of the substrate.

10. The light source system according to any one of claims 1 to 7, wherein,

the light source system further comprises a focusing assembly located on the propagation path of the excitation light and/or the excited light, the focusing assembly comprising one or more lenses (71) for converging light rays; or alternatively, the process may be performed,

the light source system further comprises a light homogenizing component (72) positioned at one side of the wavelength conversion device (30), and the excited light or the excitation light is guided by the light guiding component (40) in sequence and is reflected by the reflecting component (50) and then enters the light homogenizing component (72).