CN112526811A

CN112526811A - Light source system and projection device

Info

Publication number: CN112526811A
Application number: CN202011307501.6A
Authority: CN
Inventors: 许紫光; 陈龙
Original assignee: Wuxi Seemile Laser Display Technology Co Ltd
Current assignee: Wuxi Seemile Laser Display Technology Co Ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-19
Anticipated expiration: 2040-11-19
Also published as: CN112526811B

Abstract

The invention provides a light source system and a projection device, wherein the light source system comprises: a light source for emitting a light beam; a light splitting element for transmitting or reflecting a light beam incident to the light splitting element therethrough; the light uniformizing element is used for performing light uniformization on the incident light, converging the light uniformized light and then emitting the light uniformized light; and the wavelength conversion device is used for emitting light beams emitted by the light uniformizing element to the wavelength conversion device and generating stimulated light by the wavelength conversion device, and the stimulated light is reflected or transmitted from the light splitting element after passing through the light uniformizing element so as to be combined. In the light source system, the light source is homogenized by using the light homogenizing element, so that the uniformity of the light beam finally emitted by the light source system is better, and the light source system is simplified.

Description

Light source system and projection device

Technical Field

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

Background

Laser light is a light source which has high brightness and strong directivity and emits a monochromatic coherent light beam, and is gradually applied to the technical field of projection display in recent years as a light source due to various advantages of laser light. In the field of white light realization, the use of a high-power blue LED or blue LD to excite a fluorescent substance to obtain a combination of green, yellow and red luminescence to synthesize white light is a current solution for realizing white light, and the solution is gradually spotlighted by researchers in the industry due to its simplicity and low cost.

In the current laser projection display product, most of laser light source systems adopt a laser excitation phosphor light-emitting mode to realize the illumination of the projection system, and the specific realization mode is as follows: the light source system obtains time sequence light output mainly through the fluorescent wheel and the light path structure thereof, and obtains white light for the projection device to use.

In a projection laser illumination system, in order to make a light beam emitted from a light source meet the illumination requirement of being uniform and matched with a display chip, a light homogenizing structure such as a condenser lens, a compound eye, a diffusion sheet and the like is used, so that the whole system is relatively complex.

In view of the above problems, the present invention provides a new light source system and a projection apparatus.

Disclosure of Invention

In order to solve the above technical problem, an aspect of the present invention provides a light source system, including:

a light source for emitting a light beam;

a light splitting element for transmitting or reflecting a light beam incident to the light splitting element therethrough;

the light uniformizing element is used for performing light uniformization on the incident light, converging the light uniformized light and then emitting the light uniformized light;

and the wavelength conversion device is used for emitting light beams emitted by the light uniformizing element to the wavelength conversion device and generating stimulated light by the wavelength conversion device, and the stimulated light is reflected or transmitted from the light splitting element after passing through the light uniformizing element so as to be combined.

Illustratively, the light homogenizing element includes a micro lens array and a total internal reflection lens, the micro lens array is disposed on a first surface of the total reflection lens facing the light splitting element, the micro lens array is configured to homogenize the incident light, and the total internal reflection lens is configured to converge and emit the homogenized light beam and collimate the homogenized light beam.

Illustratively, a second surface of the total reflection lens, which is opposite to the first surface, is provided with a groove, which is provided near a bottom surface of the first surface as a central curved surface protruding toward the second surface, wherein,

the side surface of the total internal reflection lens is a total reflection surface, and light incident to the total reflection surface is reflected by the total reflection surface and then is emitted;

the micro lens array and the central curved surface are correspondingly arranged, and light beams after being homogenized by the micro lens array are incident to the central curved surface and are converged by the central curved surface to be emitted.

Illustratively, the wavelength conversion device is disposed at a focal point of the central curved surface, and the light beam emitted from the central curved surface is converged at the wavelength conversion device.

Exemplarily, the stimulated light is emitted after being collimated by the total reflection surface and the central curved surface.

Illustratively, the central curved surface is a quadratic surface; and/or

The side surface of the total internal reflection lens is a quadric surface; and/or

The projection shape of the micro lenses in the micro lens array on the first surface is rectangular.

The light source system further includes a beam reduction element, and the beam reduction element is configured to compress the light beam emitted from the light source by the beam reduction element and then emit the light beam to the light splitting element.

Exemplarily, the beam reduction element includes a converging lens and a collimating lens, and a light beam emitted from the light source and having a first aperture is converged by the converging lens, enters the collimating lens, and is collimated by the collimating lens and then is emitted, wherein the light beam collimated by the collimating lens has a second aperture, and the first aperture is larger than the second aperture.

Exemplarily, the light source system further includes a focusing element, and the stimulated light transmitted or reflected by the light splitting element is emitted after being converged by the focusing element; and/or

The light source is a laser light source.

In another aspect of the present application, a projection apparatus is further provided, where the projection apparatus includes the light source system.

In summary, in the light source system of the present invention, the light source element is used to homogenize the light beam emitted by the light source, so that the light beam finally emitted by the light source system meets the illumination requirements of uniformity and matching with the display chip, and the light source system is simplified.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments 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 principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.

In the drawings:

FIG. 1 shows a schematic view of a light source system in an embodiment of the invention;

FIG. 2 is a diagram illustrating the optical paths of a light beam propagating within an integrator element in an embodiment of the present invention;

fig. 3 shows a schematic view of a light source system in another embodiment of the invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

In order to thoroughly understand the present invention, a detailed description will be provided below in order to explain the technical solution of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

In order to solve the problem that the system structure of the light source system of the present projection device is too complex, the present application provides a light source system, comprising: a light source for emitting a light beam; a light splitting element for transmitting or reflecting a light beam incident to the light splitting element therethrough; the light source comprises a light homogenizing element, a light source and a light source, wherein the light homogenizing element is used for homogenizing incident light, converging the homogenized light and emitting the homogenized light, and the aspect ratio of light spots of the light emitted from the light homogenizing element is matched with the aspect ratio of a display chip of a projection device; and the wavelength conversion device is used for emitting light beams emitted by the light uniformizing element to the wavelength conversion device and generating stimulated light by the wavelength conversion device, and the stimulated light is reflected or transmitted from the light splitting element after passing through the light uniformizing element so as to be combined.

The light source system of the invention evens the light beam emitted by the light source by using the light evening element, so that the uniformity of the light beam finally emitted by the light source system is better, the illumination requirement of the projection device on the uniformity of the light beam can be met, and the light source system is simplified.

The structure of the light source system of the present application is described below with reference to fig. 1 to 3, wherein fig. 1 shows a schematic diagram of the light source system in an embodiment of the present invention; FIG. 2 is a diagram illustrating the optical paths of a light beam propagating within an integrator element in an embodiment of the present invention; fig. 3 shows a schematic view of a light source system in another embodiment of the invention.

As an example, as shown in fig. 1, the light source system of the present invention includes a light source (not shown) for emitting a light beam as incident light of the light source system. Alternatively, the light source may be a laser light source for emitting a laser light beam.

The light beam emitted by the light source may be blue light, red light, violet light, ultraviolet light, or the like, but is not limited thereto. The light source is a laser light source, and a specific laser light source device emits laser light having a single polarization characteristic, and a 445nm/30W laser light source of japanese japan asian company is currently used in many cases, but other laser light sources may be used. In order to ensure the light emitting effect of the light source, the light path of the combined light can be properly adjusted according to the different quantity and polarization characteristics of the used laser light sources.

The light source system of the present invention further includes a light splitting element 103, a light homogenizing element and a wavelength conversion device 105, which are combined to realize the time-sequential output of the polychromatic light, so as to complete the conversion from the monochromatic light to the white light.

In one example, the light splitting element 103 is used to transmit or reflect the light beam incident to the light splitting element 103 through the light splitting element 103. For example, as shown in fig. 1, the light beam incident on the light splitting element 103 is reflected by the light splitting element 103 and then incident on the microlens array 108 of the light unifying element, or, for example, as shown in fig. 3, the light beam incident on the light splitting element 103 is transmitted by the light splitting element 103 and then incident on the microlens array 108 of the light unifying element.

The light splitting element 103 may be any element capable of performing a light splitting function, and for example, the light splitting element 103 may be a dichroic mirror.

The light splitting element 103 is disposed to be inclined so that an angle between an optical axis (also referred to as a central axis of the light beam) of the light beam incident on the light splitting element 103 and an incident surface is 45 °, for example, the light splitting element 103 is disposed to be inclined by 45 ° with respect to a horizontal plane, and this is provided to make the laser light whose wavelength is changed by the wavelength conversion device 105 before and after being reflected by the light splitting element 103 perpendicular to each other, and to make the light beams before and after being reflected by the light splitting element 103 perpendicular to each other.

In one example, the light source system further includes a beam reduction element disposed between the light source and the light splitting element 103, and the beam reduction element is configured to compress the light beam emitted from the light source and then emit the compressed light beam to the light splitting element 103. For example, as shown in fig. 1 and fig. 3, the beam reduction element includes a converging lens 101 and a collimating lens 102, a light beam emitted from the light source and having a first aperture is converged by the converging lens 101, enters the collimating lens 102, and is collimated by the collimating lens 102 and then is emitted, wherein the light beam collimated by the collimating lens 102 has a second aperture, and the first aperture is larger than the second aperture. The beam-reducing element may further include another lens group composed of a plurality of lenses, and is not particularly limited herein.

The beam emitted by the light source is compressed by the beam-reducing element, so that the aperture of the beam is compressed to a second aperture, and the second aperture can be matched with the projection area of the micro-lens array 108 of the light-homogenizing element on the first plane, thereby reducing the damage of the beam and enabling most of the beam emitted by the light source to be used for generating stimulated light after being homogenized.

The converging lens 101 may be any lens known to those skilled in the art capable of converging, such as a convex lens, and the collimating lens 102 may be any lens known to those skilled in the art capable of collimating, such as a biconcave lens.

Further, the light beam transmitted or reflected by the light splitting element 103 is incident to the light uniformizing element as an incident light, the light uniformizing element is configured to uniformize the incident light and converge and emit the uniformized light beam, and the light uniformizing element performs light uniformizing on the light beam, so that the light beam emitted by the light source system has better uniformity, and when the light uniformizing element is applied to a projection device, the illumination requirement of the projection device can be met.

In one example, the aspect ratio of the light spot of the light beam emitted from the light uniformizing element is matched with the aspect ratio of the picture projected by the display chip of the projection device, for example, the aspect ratio of the picture projected by the display chip of the projection device is 1:1, the aspect ratio of the light spot is 1:1, the aspect ratio of the picture projected by the display chip of the projection device is 4:3, the aspect ratio of the light spot is 4:3, the aspect ratio of the picture projected by the display chip of the projection device is 3:2, and the aspect ratio of the light spot is 3:2, or other aspect ratios are also possible.

In one example, as shown in fig. 2, the light equalizing element includes a micro lens array 108 and a Total Internal Reflection lens 104 (TIR), the micro lens array 108 is disposed on a first surface of the TIR lens facing the light splitting element 103, the micro lens array 108 is configured to equalize incident light (for example, a light beam reflected or transmitted by the light splitting element 103), and the TIR lens 104 is configured to converge and emit the equalized light beam, and collimate the laser beam emitted by the wavelength conversion device 105. The light homogenizing element combined by the micro lens array 108 and the total internal reflection lens 104 not only can realize the function of homogenizing light, but also can simplify the light source system and reduce the volume of the light source system.

Illustratively, a second surface of the total reflection lens, which is opposite to the first surface, is provided with a groove, a bottom surface of the groove, which is close to the first surface, is provided with a central curved surface 1041 which is convex towards the second surface, and optionally, the central curved surface 1041 is a quadric surface or other aspheric surface shape.

In one example, the side surface of the tir lens 104 is a total reflection surface, light incident on the total reflection surface is reflected by the total reflection surface and then exits, and the side surface is a curved surface, and the curvature of the curved surface may be reasonably set according to actual needs, for example, the curved surface may be a quadratic surface, or other aspheric surface. The total reflection surface is convex toward the outer side of the total reflection lens, so that the light incident to the total reflection surface is reflected by the total reflection surface and then exits from the first surface of the total reflection lens 104.

Further, as shown in fig. 2, the microlens array 108 and the central curved surface 1041 are correspondingly arranged, and the light beam homogenized by the microlens array 108 enters the central curved surface 1041 and is converged by the central curved surface 1041 and then exits. Alternatively, the size of the projection of the microlens array 108 on the first surface may be consistent with the size of the projection of the central curved surface 1041 on the first surface.

The microlens array 108 is formed by connecting and combining a plurality of microlenses, wherein the shape of the projection of the microlenses on the first surface in the microlens array 108 is rectangular, that is, the shape of the microlenses is rectangular, for example, the aspect ratio of the microlenses can be set reasonably according to actual needs, for example, the aspect ratio of the image to be projected by the display chip can be set as 1:1, 3:2, 4:3 or other ratios. In one example, the aspect ratio of the light spot of the finally emergent light beam is matched with the aspect ratio of the picture projected by the display chip of the projection device through the matching of the rectangular micro lens and the central curved surface 1041.

Further, the TIR lens may be made of a light-transmissive material, and the micro lens array 108 may also be made of a light-transmissive material, including but not limited to glass, Polycarbonate (PC), or polymethyl methacrylate (PMMA). Alternatively, TIR lens and microlens array 108 may be integrally formed, or may be otherwise formed.

The wavelength conversion device 105 may include a wavelength conversion partition configured to perform wavelength conversion on a light beam received from the light unifying element to generate a stimulated light, which may be reflected to the light unifying element, and then be collimated by the light unifying element and reflected or transmitted from the light splitting element 103 to perform light combination. For example, the wavelength conversion device 105 may also have a reflective region for reflecting the stimulated light.

The wavelength conversion device 105 is a rotary wavelength conversion device 105 that rotates periodically about its axis of rotation, optionally the wavelength conversion device 105 comprises one of a wheel type wavelength conversion device 105 and a bucket type wavelength conversion device 105. For example, the wavelength conversion device 105 is a wheel or barrel fluorescent device.

In one example, the wavelength conversion device 105 includes a base body, and a wavelength conversion material formed on the base body, for example, the base body may be a circular base body, the wavelength conversion material may be disposed in a circumferential direction of the base body, a fan-shaped ring, a half-ring shape, or the like may be formed on the base body, and wavelength conversion materials for different conversion wavelengths may also be disposed in a circumferential direction in the vicinity of an outer periphery of the base body. Here, the region in which the wavelength conversion material is formed is also referred to as a wavelength conversion partition.

The substrate is a metal substrate made of copper, aluminum, or the like, and the surface of the substrate on the side of the excitation light irradiation device is mirror-finished by silver vapor deposition or the like so that the received laser light is reflected off the wavelength conversion device 105. The wavelength conversion material is formed on the surface of the mirror-finished substrate.

Further, the wavelength conversion device 105 further includes a driving element for driving the substrate to rotate according to a predetermined period. Optionally, the driving device includes a motor, wherein the base is disposed in close contact with the motor, and the motor drives the base to rotate. For example, the base is a drum wheel, and the center portion is fixed to a rotation shaft of a motor and is rotatable. As an implementation mode, a shaft hole is arranged at the center of the base body, a fixing ring is arranged at the shaft hole, a rotating motor penetrates through the shaft hole through a rotating shaft and is fastened with the fixing ring, so that the rotating motor can drive the base body through the rotating shaft, and corresponding treatment is carried out when exciting light strikes different partitions of the base body. Optionally, the driving element drives the substrate to rotate at a constant speed or at a non-constant speed, so that the output time sequence of the laser can be controlled more flexibly.

For example, the wavelength converting partition surface is provided with a wavelength converting material including, but not limited to, a red light converting material, a green light converting material, a blue light converting material, and a yellow light converting material.

In one embodiment, the wavelength conversion device 105 includes a partition one, a partition two, and a partition three, where the partition one, the partition two, and the partition three are wavelength conversion partitions, a surface of the partition one is a yellow light conversion material, a surface of the partition two is a red light conversion material, and a surface of the partition three is a green light conversion material. When the blue excitation light is incident to the surface of the first partition, the wavelength is converted to generate yellow stimulated light; when the blue excitation light enters the surface of the second subarea, the wavelength is converted to generate red excited light; when the excitation light of blue color is incident on the surface of the third division, the wavelength conversion generates the excited light of green color. In one example, the wavelength conversion device 105 may further include a reflective partition that reflects the light beam, e.g., blue light, for exit from the light unifying element.

In one embodiment, the exciting light incident on the surface of the wavelength conversion material generates stimulated light, the emergent direction of the stimulated light is in any direction, namely, the range of the included angle theta between the emergent direction of the stimulated light and the incident direction of the exciting light is more than 90 degrees and less than or equal to 180 degrees. In addition, in order to improve efficiency and reduce optical loss, the substrate of the wavelength conversion device 105 is a metal substrate made of copper, aluminum, or the like, and the surface of the substrate on the side of the excitation light irradiation device is mirror-finished by silver vapor deposition or the like so that the received laser light is reflected off the wavelength conversion device 105.

In one example, the wavelength conversion element is disposed before and after the focal point of the shaping lens, for example, the wavelength conversion device 105 is disposed at the focal point of the central curved surface 1041, and the light beam emitted from the central curved surface 1041 is converged at the wavelength conversion device 105, or the wavelength conversion element is disposed in a suitable distance range before and after the focal point of the central curved surface 1041, and the specific distance range may be set according to actual needs, and is not limited to a certain numerical range.

As shown in fig. 1 and 3, the light source system further includes a focusing element, the stimulated light transmitted or reflected by the light splitting element 103 is converged by the focusing element and then emitted, and the multi-color stimulated light is focused by the focusing element and then can be synthesized into white light or light of any other color.

Illustratively, the focusing element may include a first convex lens 106 and a second convex lens 107, and the laser light transmitted or reflected from the light splitting element 103 is converged by the combination of the convex lenses, and the focusing element may also be composed of other lenses having a converging function, which is not illustrated herein.

In the light source system as shown in fig. 1, a light beam emitted from a light source, for example, a laser light source, is converged by a converging lens 101, then enters the collimating lens 102, is collimated by the collimating lens 102, then exits to a light splitting element 103, then is reflected by the light splitting element 103 to a micro lens array 108 of a light homogenizing element, is homogenized by the micro lens array 108, then enters a central curved surface 1041, then is converged by the central curved surface 1041, and then enters a wavelength conversion device 105, wherein the wavelength conversion device 105 may be disposed at a focal point of the central curved surface 1041, the light beam exiting from the light homogenizing element enters the wavelength conversion device 105, and generates a laser beam by the wavelength conversion device 105, the laser beam is reflected to a total reflection lens, exits to the light splitting element 103 after being collimated by the central curved surface 1041 and the total reflection surface of the total reflection lens, the laser beam is transmitted by the light splitting element 103, and then enters a first convex lens 106 of a focusing element, and then exits from the first convex lens 106, enters the second convex lens 107, and finally exits from the second convex lens 107.

In the light source system as shown in fig. 3, a light beam emitted from a light source, for example, a laser light source, is converged by a converging lens 101, then enters the collimating lens 102, is collimated by the collimating lens 102, then exits to a light splitting element 103, then is transmitted to a microlens array 108 of a light homogenizing element by the light splitting element 103, is homogenized by the microlens array 108, then enters a central curved surface 1041, then is converged by the central curved surface 1041, and then enters a wavelength conversion device 105, wherein the wavelength conversion device 105 may be disposed at a focal point of the central curved surface 1041, the light beam exiting from the light homogenizing element enters the wavelength conversion device 105, and generates a laser beam by the wavelength conversion device 105, the laser beam is reflected to a total reflection lens, exits to the light splitting element 103 after being collimated by the central curved surface 1041 and the total reflection lens, the laser beam is reflected by the light splitting element 103, and then enters a first convex lens 106 of a focusing element, and then exits from the first convex lens 106, enters the second convex lens 107, and finally exits from the second convex lens 107.

The explanation and description of the light source system of the present invention are completed so far, and the complete light source system may further include other elements, which are not described herein again.

The light source system of the present invention can be applied in any application scenario where synthetic light is required, including but not limited to projection devices such as laser projection devices, e.g. monolithic laser projectors.

In summary, in the light source system of the present invention, the light source is homogenized by using the light homogenizing element, so that the light beam finally emitted by the light source system can meet the illumination requirement of the projection apparatus on the uniformity of the light beam, and the aspect ratio of the light spot of the light beam emitted by the light homogenizing element is matched with the aspect ratio of the image projected by the display chip of the projection apparatus, so that the light beam can meet the illumination requirement matched with the display chip.

In addition, the present application also provides a projection apparatus, which includes the light source system, and the light beam emitted from the light source system is used as an illumination light beam.

In one example, the projection device further includes a projection component, such as an optical engine, for emitting the projection light beam and performing image projection display, such as displaying an image, e.g., an image or a video, on a display interface, such as a curtain, which may also be an audio/video integrated device. Illustratively, the projection apparatus includes various elements for performing a projection function, such as a projection module, an image processing unit for performing image processing (e.g., a/D conversion, synchronization signal separation, rewriting/reading data to/from a frame memory) on a video signal application from the outside, and a driving unit for driving the display device in accordance with the image data from the image processing unit.

The light source system may be included as part of a projection assembly, which may further include the projection lens for emitting a projection beam converted from the illumination beam.

The projection assembly may further include an optical-mechanical assembly for converting the illumination beam into an image beam. The projection lens is used for converting the image beam into a projection beam and transmitting the projection beam to form a picture, for example, a picture is formed on a curtain for a user to watch.

The projection device further comprises a data transmission interface (not shown) for receiving image data information or video data information to be projected and displayed from the outside and outputting the image data information or video data information to be projected and displayed to the projection component.

The projection device further includes a power interface (not shown) configured to be electrically connected to an external power source to supply power to the projection device, so that the projection device can operate normally.

The structure of the complete projection device is not described here, and those skilled in the art will appreciate that the projection device of the present application may also include other necessary components.

Because the light beam that sends the light source carries out dodging through using dodging component among projection arrangement's the light source system of this application to make the light beam of the final outgoing of light source system satisfy even and with display chip assorted lighting requirements, simplified light source system, because the light beam of light source system transmission satisfies even and with display chip assorted lighting requirements, consequently can improve projection arrangement's projection display effect, promote user's use and experience.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. It will also be appreciated by persons skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A light source system, comprising:

a light source for emitting a light beam;

2. The light source system according to claim 1, wherein the light homogenizing element includes a micro lens array and a total internal reflection lens, the micro lens array is disposed on a first surface of the total reflection lens facing the light splitting element, the micro lens array is configured to homogenize the incident light, and the total internal reflection lens is configured to converge and emit the homogenized light beam and collimate the homogenized light beam.

3. The light source system according to claim 2, wherein a second surface of the total reflection lens opposite to the first surface is provided with a groove, a bottom surface of the groove near the first surface is provided with a central curved surface convex toward the second surface, wherein,

4. The light source system according to claim 3, wherein the wavelength conversion device is disposed at a focal point of the central curved surface, and the light beam exiting from the central curved surface is condensed at the wavelength conversion device.

5. The light source system according to claim 3, wherein the stimulated light is emitted after being collimated by the total reflection surface and the central curved surface.

6. The light source system according to claim 3, wherein the central curved surface is a quadratic surface; and/or

The projection shape of the micro-lens in the micro-lens array on the first surface is rectangular.

7. The light source system according to claim 1, further comprising a beam reduction element for causing the light beam emitted from the light source to be compressed by the beam reduction element and then emitted to the light splitting element.

8. The light source system of claim 7, wherein the beam shrinking component comprises a converging lens and a collimating lens, and a light beam emitted from the light source and having a first aperture is converged by the converging lens, enters the collimating lens, and is collimated by the collimating lens and then exits, wherein the light beam collimated by the collimating lens has a second aperture, and the first aperture is larger than the second aperture.

9. The light source system according to claim 1, wherein the light source system further comprises a focusing element, and the stimulated light transmitted or reflected by the light splitting element is emitted after being converged by the focusing element; and/or

The light source is a laser light source.

10. A projection device, characterized in that the projection device comprises a light source system as claimed in any one of claims 1 to 9.