A wavelength conversion device, a light source device, and a light projection system thereof

Abstract

The application provides a wavelength conversion device, a light source device and a light projection system thereof. The wavelength conversion device comprises: a heat-conducting substrate comprising a first surface and a second surface opposite to the first surface; a wavelength conversion material arranged on the first surface of the heat-conducting substrate or embedded in the heat-conducting substrate, used for converting a part of first excitation light incident thereon into stimulated light and transmitting the part of the first excitation light to form second excitation light, the stimulated light and the second excitation light being used for light combination; and an optical film layer arranged on a side of the wavelength conversion material away from the first excitation light, used for reflecting the stimulated light and transmitting the second excitation light. The second excitation light in a Lambertian distribution or an approximate Lambertian distribution is obtained by using the refraction and scattering characteristics of the wavelength conversion material itself, so as to dissipate the speckle and match the stimulated light, without the need of additionally arranging a diffuse reflection structure, so that the volume of the light source device in which the wavelength conversion device is arranged can be reduced, the structure of the light source device is more compact, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically to a wavelength conversion device, a light source device, and a light projection system thereof. Background Technology

[0002] Lasers are high-brightness, highly directional light sources that emit monochromatic coherent beams. Due to their numerous advantages, lasers have been increasingly used as light sources in the field of projection display technology in recent years. Among them, laser phosphor light source modules are widely used in industries such as stage lighting and beam lights because of their advantages such as low cost, high collimation, and long-distance illumination.

[0003] In related technologies, laser fluorescent light sources typically use blue light to excite yellow phosphors to produce yellow light, which is then combined with the remaining blue light to form white light. The yellow light is Lambertian, while the blue light used for combining is Gaussian. To match the yellow light, an additional diffuse reflection structure is needed in the light source device to convert the blue light from Gaussian to Lambertian, leading to increased cost, larger device size, and a less compact structure.

[0004] Therefore, improvements are needed to at least partially address the aforementioned problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To address the existing problems, this application provides a wavelength conversion device, comprising:

[0007] A thermally conductive substrate, the thermally conductive substrate including a first surface and a second surface opposite to the first surface;

[0008] A wavelength conversion material is disposed on the first surface of the thermally conductive substrate or embedded in the thermally conductive substrate, for converting a portion of the first excitation light incident thereon into laser-received light and transmitting a portion of the first excitation light to form a second excitation light, wherein the laser-received light and the second excitation light are used to combine light;

[0009] An optical film layer is disposed on the side of the wavelength conversion material opposite to the incident first excitation light, for reflecting the laser beam and transmitting the second excitation light.

[0010] For example, the thermally conductive substrate is an opaque thermally conductive substrate; or

[0011] The thermally conductive substrate is a transparent thermally conductive substrate; or

[0012] The thermally conductive substrate includes a transparent substrate portion and an opaque substrate portion, with at least a portion of the wavelength conversion material disposed on the transparent substrate portion.

[0013] For example, when the wavelength conversion material is embedded in the thermally conductive substrate, the surface of the wavelength conversion material that receives the first excitation light is defined as the incident surface, the incident surface is flush with the first surface of the thermally conductive substrate, and the total thickness of the wavelength conversion material and the optical film is equal to the thickness of the thermally conductive substrate.

[0014] For example, the thickness of the transparent substrate portion is equal to the thickness of the opaque substrate portion; or

[0015] The thickness of the transparent substrate portion is less than the thickness of the opaque substrate portion. The surface of the wavelength conversion material receiving the first excitation light is defined as the incident surface. The incident surface is flush with the first surface of the opaque substrate portion, and the total thickness of the wavelength conversion material, the optical film layer, and the transparent substrate portion is equal to the thickness of the opaque substrate portion.

[0016] Exemplarily, it also includes a light modulation structure disposed on a first surface of the thermally conductive substrate, the light modulation structure being used to reflect the first excitation light incident thereon, the light modulation structure including a reflective structure and / or a diffuse reflective structure, the light modulation structure surrounding the wavelength conversion material.

[0017] For example, the wavelength conversion material is circular, and the light modulation structure is annular and located outside the wavelength conversion material; or

[0018] The wavelength conversion material is in the shape of a ring, and the optical modulation structure includes a first optical modulation structure and a second optical modulation structure. The first optical modulation structure, the second optical modulation structure, and the second optical modulation structure are all in the shape of a ring and are located on the inner and outer sides of the wavelength conversion material, respectively.

[0019] For example, the light control structure is disposed independently of the thermally conductive substrate, or the light control structure is integrally formed with the thermally conductive substrate.

[0020] This application, in another aspect, provides a light source device, which includes a light source, a beam-splitting element, and the aforementioned wavelength conversion device, wherein...

[0021] The light source is used to emit a first excitation light;

[0022] The beam splitter is used to transmit or reflect the first excitation light to the wavelength conversion device. The first excitation light incident on the wavelength conversion device is at least partially incident on the wavelength conversion material. The optical path where the laser is located is the first optical path, the optical path where the second excitation light is located is the second optical path, and the beam splitter is located on the first optical path and the second optical path.

[0023] When the beam splitter is used to transmit the first excitation light, the laser beam is incident on the beam splitter and reflected by the beam splitter, and the second excitation light is incident on the beam splitter and transmitted by the beam splitter to combine with the laser beam.

[0024] When the beam splitter is used to reflect the first excitation light, the laser beam is incident on the beam splitter and transmitted by the beam splitter, and the second excitation light is incident on the beam splitter and reflected by the beam splitter to combine with the laser beam.

[0025] Exemplarily, the wavelength conversion device further includes a light modulation structure disposed on a first surface of the thermally conductive substrate. The light modulation structure is used to reflect first excitation light incident thereon. The light modulation structure includes a reflection structure and / or a diffuse reflection structure. The light modulation structure surrounds the wavelength conversion material. The first excitation light incident on the wavelength conversion device is entirely incident on the wavelength conversion material or entirely incident on both the wavelength conversion material and the light modulation structure.

[0026] The wavelength conversion material is circular, and the light modulation structure is annular and located outside the wavelength conversion material. The diameter of the light spot of the first excitation light incident on the wavelength conversion device is greater than or equal to the diameter of the wavelength conversion material, and / or the center of the light spot coincides with the center of the wavelength conversion material; or

[0027] The wavelength conversion material is annular, and the light modulation structure includes a first light modulation structure and a second light modulation structure. Both the first light modulation structure and the second light modulation structure are annular and are located on the inner and outer sides of the wavelength conversion material, respectively. The diameter of the light spot is greater than or equal to the radial width of the wavelength conversion material, and / or the distance from the center of the light spot to the center of the wavelength conversion material is equal to the median diameter of the wavelength conversion material.

[0028] For example, the optical axis of the laser beam and the optical axis of the second excitation light are not coaxial when incident on the beam splitter, but are coaxial when combined by the beam splitter.

[0029] For example, it also includes:

[0030] A beam-shrinking lens is disposed between the light source and the beam-splitting element, wherein the first excitation light emitted by the light source is shrunken by the beam-shrinking lens and then incident on the beam-splitting element;

[0031] A first converging lens is disposed between the beam splitter and the wavelength conversion device and located on the first optical path. The first excitation light reflected or transmitted by the beam splitter is converged by the first converging lens and then incident on the wavelength conversion device. The laser beam is collimated by the first converging lens and then incident on the beam splitter.

[0032] A collimating lens, located in the second optical path, is used to collimate the second excitation light;

[0033] A shaping lens group, located in the second optical path, is used to shape the second excitation light so that the size of the spot of the second excitation light when it is combined by the beam splitter is equal to the size of the laser-received spot when it is combined by the beam splitter.

[0034] A reflective component, located in the second optical path, is used to direct the second excitation light to the beam-splitting element after one or more reflections.

[0035] The second converging lens is used to converge the second excitation light and the laser light received before they are emitted.

[0036] For example, the thermally conductive substrate is a transparent substrate, the wavelength conversion material is annular, and the second excitation light is reflected by the reflective component and passes through the thermally conductive substrate inside the wavelength conversion material; or

[0037] The thermally conductive substrate includes a transparent substrate portion and an opaque substrate portion. At least a portion of the wavelength conversion material is disposed on the transparent substrate portion. The wavelength conversion material is annular. The second excitation light is reflected by the reflective component and passes through the transparent substrate portion inside the wavelength conversion material; or

[0038] The second excitation light is reflected by the reflective component and then propagates in the space outside the wavelength conversion device.

[0039] This application further provides a method for debugging a light source device, used for debugging the aforementioned light source device, including:

[0040] An imaging system is provided, wherein the light inlet of the imaging system is matched with the light outlet of the light source device, and the imaging system includes a display.

[0041] Turn on the light source of the light source device so that the image of the light spot of the first excitation light incident on the wavelength conversion device is imaged on the display;

[0042] The light source device is adjusted based on the image of the light spot displayed on the display.

[0043] For example, the light source device further includes a first converging lens disposed between the beam splitter and the wavelength conversion device and located on the first optical path. The first excitation light reflected or transmitted by the beam splitter is converged by the first converging lens and then incident on the wavelength conversion device, and the laser beam is collimated by the first converging lens and then incident on the beam splitter.

[0044] Adjusting the light source device includes:

[0045] When the wavelength conversion material of the wavelength conversion device is circular, the positions of the first converging lens and the wavelength conversion device are adjusted in directions perpendicular to and parallel to the optical axis of the first excitation light incident on the wavelength conversion device, respectively, so that the center of the light spot coincides with the center of the wavelength conversion material and the diameter of the light spot is greater than or equal to the diameter of the wavelength conversion material.

[0046] When the wavelength conversion material is in the shape of a ring, the positions of the first converging lens and the wavelength conversion device are adjusted in directions perpendicular to and parallel to the optical axis of the first excitation light incident on the wavelength conversion device, respectively, so that the distance between the center of the light spot and the center of the wavelength conversion material is equal to the median diameter of the wavelength conversion material, and the diameter of the light spot is greater than or equal to the radial width of the wavelength conversion material.

[0047] This application also provides a light projection system, which includes the aforementioned light source device.

[0048] The wavelength conversion device, light source device, debugging method, and light projection system of this application utilize the refraction and scattering properties of the wavelength conversion material itself to obtain a second excitation light with a Lambertian or approximately Lambertian distribution, thereby eliminating speckle and matching the laser beam. No additional diffuse reflection structure is required, which can reduce the volume of the light source device where the wavelength conversion device is located and make the structure of the light source device more compact, while also reducing costs. Attached Figure Description

[0049] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions to explain the principles of the invention.

[0050] In the attached image:

[0051] Figure 1 A schematic diagram of the structure of a light source device of the related technology is shown;

[0052] Figure 2A A cross-sectional view of a wavelength conversion device according to a specific embodiment of this application is shown;

[0053] Figure 2B A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown;

[0054] Figure 2C A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown;

[0055] Figure 2D A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown;

[0056] Figure 2E A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown;

[0057] Figure 3A It shows Figure 2A or Figure 2B The diagram shows a top view of the wavelength conversion device.

[0058] Figure 3B It shows Figure 2C The diagram shows a top view of the wavelength conversion device.

[0059] Figure 3C It shows Figure 2D The diagram shows a top view of the wavelength conversion device.

[0060] Figure 3D It shows Figure 2E The diagram shows a top view of the wavelength conversion device.

[0061] Figure 4A A schematic diagram of the structure of a light source device according to a specific embodiment of this application is shown;

[0062] Figure 4B A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown;

[0063] Figure 4C A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown;

[0064] Figure 4D A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown.

[0065] Figure 4E A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown.

[0066] Figure 4F A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown.

[0067] Explanation of reference numerals in the attached figures:

[0068] 110 - Light source, 120 - Dichroic mirror, 130 - Fluorescent component, 140 - Diffuse reflection structure;

[0069] 200 - Light source device; 210 - Wavelength conversion device; 211 - Thermally conductive substrate; 2111 - Transparent substrate portion; 2112 - Opaque substrate portion; 212 - Wavelength conversion material; 213 - Optical film layer; 214 - Light control element; 2141 - First light control element; 2142 - Second light control element; 215 - Driving element; 220 - Light source; 230 - Beam splitter; 240 - Beam converging element; 250 - First converging lens; 260 - Collimating lens; 270 - Shaping lens group; 2801 - First reflecting mirror; 2802 - Second reflecting mirror; 2803 - Third reflecting mirror; 290 - Second converging lens. Detailed Implementation

[0070] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0071] It should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this application to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout.

[0072] It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or parts, these elements, components, areas, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or part from another element, component, area, layer, or part. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or part discussed below may be referred to as the second element, component, area, layer, or part.

[0073] Spatial relation terms such as "below," "under," "below," "under," "above," and "above" are used here for convenience to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of devices in use and operation.

[0074] The structure of the laser fluorescence light source device in related technologies is as follows: Figure 1 As shown, the light source 110 emits a first excitation light (e.g., blue light), which has a Gaussian distribution. The first excitation light is incident on a dichroic mirror 120. The dichroic mirror 120 transmits part of the first excitation light to the fluorescent component 130 and reflects part of the first excitation light to the diffuse reflection structure 140. The fluorescent component 130 generates a laser beam (e.g., yellow light) under the excitation of the incident first excitation light. The generated laser beam is reflected back to the dichroic mirror 120. Due to the refraction and scattering characteristics of the fluorescent component 130 itself, the generated laser beam has a Lambertian distribution or is approximately Lambertian. The first excitation light incident on the diffuse reflection structure 140 is diffusely reflected by the diffuse reflection structure 140 to form a second excitation light with a Lambertian distribution or is approximately Lambertian, in order to dissipate the speckle and match the laser beam. The second excitation light is incident on the dichroic mirror 120 and combines with the laser beam (e.g., blue light and yellow light combine to obtain white light).

[0075] In other words, in the light source device of the laser fluorescence light source of the related technology, in order to match the laser light source which has a Lambertian or approximately Lambertian distribution, additional structures need to be set in the light source device (e.g., Figure 1 The diffuse reflection structure 140 shown converts the first excitation light, which is Gaussian distributed, into a second excitation light, which is Lambertian distributed or approximately Lambertian distributed, resulting in increased cost, larger size of the light source device, and less compact structure of the light source device.

[0076] In view of the above-mentioned problems, this application provides a wavelength conversion device, which includes: a thermally conductive substrate, the thermally conductive substrate including a first surface and a second surface opposite to the first surface; a wavelength conversion material disposed on the first surface of the thermally conductive substrate or embedded in the thermally conductive substrate, for converting a portion of a first excitation light incident thereon into laser-received and transmitted portion of the first excitation light to form a second excitation light, wherein the laser-received and second excitation light are used for light combination; and an optical film layer disposed on the side of the wavelength conversion material opposite to the incident first excitation light, for reflecting the laser-received and transmitting the second excitation light.

[0077] The wavelength conversion device of this application utilizes the refraction and scattering properties of the wavelength conversion material itself to obtain a second excitation light with a Lambertian or approximately Lambertian distribution, thereby eliminating speckle and matching the laser beam. It eliminates the need for additional diffuse reflection structures, reduces the volume of the light source device where the wavelength conversion device is located, and makes the structure of the light source device more compact, while also reducing costs.

[0078] The following is in conjunction with the appendix Figures 2A to 2E as well as Figures 3A to 3D The wavelength conversion device of this application is described in detail, wherein, Figure 2AA cross-sectional view of a wavelength conversion device according to a specific embodiment of this application is shown. Figure 2B A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown. Figure 2C A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown. Figure 2D A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown. Figure 2E A cross-sectional view of a wavelength conversion device according to another specific embodiment of this application is shown. Figure 3A It shows Figure 2A or Figure 2B The diagram shows a top view of the wavelength conversion device. Figure 3B It shows Figure 2C The diagram shows a top view of the wavelength conversion device. Figure 3C It shows Figure 2D The diagram shows a top view of the wavelength conversion device. Figure 3D It shows Figure 2E The image shows a top view of the wavelength conversion device.

[0079] In one example, such as Figures 2A to 2E As shown, the wavelength conversion device 210 of this application includes: a thermally conductive substrate 211, which includes a first surface and a second surface opposite to the first surface; a wavelength conversion material 212, disposed on the first surface of the thermally conductive substrate 211 or embedded in the thermally conductive substrate 211, for converting a portion of the first excitation light incident thereon into laser light and transmitting a portion of the first excitation light to form a second excitation light, wherein the laser light and the second excitation light are combined; and an optical film layer 213, disposed on the side of the wavelength conversion material 212 opposite to the incident first excitation light, for reflecting the laser light and transmitting the second excitation light. Exemplarily, the first and second excitation lights are blue light, the laser light is yellow light, and the laser light and the second excitation light are combined to obtain white light. Exemplarily, the wavelength conversion material 212 is fluorescent ceramic or phosphor. Exemplarily, the thickness tolerance of the wavelength conversion material 212 is set to ±0.02 mm, preferably 0.001 mm, to facilitate control of color temperature consistency. For example, the second excitation light and the laser-received light can form white light with a color temperature greater than 6500K in terms of energy and wavelength characteristics. For example, the energy of the first excitation light used to excite the wavelength conversion material 212 to generate the laser-received light is greater than the energy of the second excitation light used to combine with the laser-received light.

[0080] In one example, the surface of the wavelength conversion material 212 that receives the first excitation light is defined as the incident surface, and the surface of the wavelength conversion material 212 that emits the laser light and the second excitation light is defined as the emitting surface. The incident surface and the emitting surface of the wavelength conversion material 212 are two surfaces that are opposite to each other. The optical film layer 213 is disposed on the side of the emitting surface of the wavelength conversion material 213 (that is, the optical film layer 213 is disposed on the side of the wavelength conversion material 213 away from the incident surface). Exemplarily, the optical film layer 213 can be any suitable material capable of reflecting the laser light and transmitting the excitation light.

[0081] In one example, the first excitation light has a Gaussian distribution. The wavelength conversion material 212 can convert a portion of the first excitation light incident on it into laser light and transmit a portion of the first excitation light to form a second excitation light. During this process, due to the refraction and scattering characteristics of the wavelength conversion material itself, the laser light emitted from the wavelength conversion material 212 and the second excitation light have a Lambertian distribution or approximately a Lambertian distribution. The laser light emitted from the wavelength conversion material 212 and the second excitation light are incident on the optical film 213. The optical film 213 reflects the laser light and transmits the second excitation light. The laser light reflected by the optical film 213 passes through the wavelength conversion material again and combines with the second excitation light transmitted by the optical film 213 in the subsequent optical path of the light source device. In other words, the wavelength conversion device of this application can form a second excitation light with a Lambertian or approximately Lambertian distribution to dissipate the spot and match the laser beam with a Lambertian or approximately Lambertian distribution. It eliminates the need for additional structures (such as diffuse reflection structures) in the light source device to convert the first excitation light with a Gaussian distribution into the second excitation light with a Lambertian or approximately Lambertian distribution. This reduces the volume of the light source device where the wavelength conversion device is located and makes the structure of the light source device more compact, while also reducing costs.

[0082] In one example, the thermally conductive substrate 211 is an opaque thermally conductive substrate, for example, such as Figure 2A and Figure 2B The thermally conductive substrate 211 shown is an opaque thermally conductive substrate; or, the thermally conductive substrate 211 is a transparent thermally conductive substrate, for example, as shown in the figure. Figure 2E The thermally conductive substrate 211 shown is a transparent thermally conductive substrate; or, as... Figure 2C and Figure 2D As shown, the thermally conductive substrate includes a transparent substrate portion 2111 and an opaque substrate portion 2112, with at least a portion of the wavelength conversion material 212 correspondingly disposed on the transparent substrate portion 2111. The transparent thermally conductive substrate and the transparent substrate portion are capable of transmitting both the second excitation light and the laser beam. Exemplarily, all of the wavelength conversion material 212 is correspondingly disposed on the wavelength conversion material 212, and the size of the transparent substrate portion 2111 is greater than or equal to the wavelength conversion material 212 to avoid loss of the second excitation light. Exemplarily, the arrangement of the thermally conductive substrate 211 is not limited to this. Figures 2A to 2EThe setup method shown can also be any other suitable setup method, for example... Figure 2A and Figure 2B The thermally conductive substrate can also be a transparent thermally conductive substrate. For example, the materials of the transparent thermally conductive substrate and the transparent substrate portion are preferably materials with a thermal conductivity greater than 20 W / (m·K), such as alumina, silicon nitride, boron nitride, aluminum nitride, sapphire, crystal, etc., but are not limited to the examples mentioned above.

[0083] In one example, such as Figure 2A As shown, when the wavelength conversion material 212 is embedded in the thermally conductive substrate 211, the surface of the wavelength conversion material 212 that receives the first excitation light is defined as the incident surface. The incident surface is flush with the first surface of the thermally conductive substrate 211, and the total thickness of the wavelength conversion material 212 and the optical film layer 213 is equal to the thickness of the thermally conductive substrate.

[0084] In one example, such as Figure 2C and Figure 2D As shown, the thickness of the transparent substrate portion 2111 is equal to the thickness of the opaque substrate portion 2112; or, as... Figure 2B As shown, the thickness of the transparent substrate 2111 is less than the thickness of the opaque substrate 2112. The surface of the wavelength conversion material 212 that receives the first excitation light is defined as the incident surface. The incident surface is flush with the first surface of the opaque substrate 2112, and the total thickness of the wavelength conversion material 212, the optical film layer 213 and the transparent substrate 2111 is equal to the thickness of the opaque substrate 2112.

[0085] In one example, such as Figures 2C to 2E As shown, the wavelength conversion device 210 further includes a light modulation structure 214 located on a first surface of the thermally conductive substrate 211. The light modulation structure 214 is used to reflect the first excitation light incident thereon. The light modulation structure 214 includes a reflective structure and / or a diffuse reflection structure, and surrounds the wavelength conversion material 212. Exemplarily, the reflective structure included in the light modulation structure 214 is a specular reflection structure. Exemplarily, the thermally conductive substrate 211, the wavelength conversion material 212, the optical film layer 213, and the light modulation structure 214 are seamlessly connected.

[0086] In one example, the light modulation structure 214 is disposed independently of the thermally conductive substrate 211, or the light modulation structure 214 and the thermally conductive substrate 211 are integrally formed. Specifically, the light modulation structure 214 can be part of the thermally conductive substrate 211; for example, the light modulation structure 214 can be part of the first surface of the thermally conductive substrate 211. Figure 2A and Figure 2BThe first portion of the first surface of the thermally conductive substrate 211 shown can serve as the light modulation structure 214. Exemplarily, the material of the light modulation structure 214 includes, but is not limited to, high thermal conductivity metals such as silver film, gold film, aluminum film, and copper film, as well as diffuse reflection layers such as aluminum oxide layer, boron nitride layer, and silicon carbide layer.

[0087] In one example, such as Figure 3A and Figure 3B As shown, the wavelength conversion material 212 is circular, and the light modulation structure 214 is annular and located outside the wavelength conversion material 212. Specifically, the light modulation structure 214 is located outside the wavelength conversion material along the radial direction; or, as... Figure 3C and Figure 3D As shown, the wavelength conversion material 212 is annular, and the light modulation structure 214 includes a first light modulation structure 2141 and a second light modulation structure 2142. Both the first light modulation structure 2141 and the second light modulation structure 2142 are annular and located on the inner and outer sides of the wavelength conversion material 212, respectively. Specifically, the first light modulation structure 2141 and the second light modulation structure 2142 are located on the inner and outer sides of the wavelength conversion material along the radial direction, respectively. Exemplarily, when the wavelength conversion material 212 is circular, the optical film layer 213 is also circular; when the wavelength conversion material 212 is annular, the optical film layer 213 is also annular. Exemplarily, the thermally conductive substrate 211 is circular. Exemplarily, the circular or annular shape of the wavelength conversion material 212 mentioned here can refer to the circular or annular projection of the wavelength conversion material 212 onto the surface of the thermally conductive substrate 211. Similarly, the shapes of the light modulation structure 214 and the optical film layer 213 mentioned here can also refer to the shapes of their projections onto the surface of the thermally conductive substrate 211.

[0088] In one example, when the wavelength conversion material 212 is circular, the thermally conductive substrate 211 is a non-rotatable thermally conductive substrate; when the wavelength conversion material 212 is annular, such as Figure 2D and Figure 2E As shown, the wavelength conversion device 210 further includes a driving element 215. The thermally conductive substrate 211 is a rotatable thermally conductive substrate, and the driving element is used to drive the thermally conductive substrate 211 to rotate. Optionally, the driving element 215 includes a motor, wherein the thermally conductive substrate 211 is disposed close to the motor. For example, the center portion of the thermally conductive substrate 211 is fixed by the rotating shaft of the motor and can rotate. As one embodiment, a shaft hole is provided at the center of the thermally conductive substrate 211, and a retaining ring is provided at the shaft hole. The motor's rotating shaft passes through the shaft hole and is fastened to the retaining ring, so that the motor can drive the thermally conductive substrate 211 to rotate. Optionally, the driving element 215 drives the thermally conductive substrate 211 to rotate at a uniform speed or a non-uniform speed. Exemplarily, the driving element 215 is also electrically connected to a connecting wire, which electrically connects the driving element 215 to an external power source to supply power to the driving element 215.

[0089] It is worth noting that the arrangement of the various parts in the wavelength conversion device of this application is not limited to the various embodiments given above, for example, Figure 2B The wavelength conversion device shown can also interchange the positions of the optical film layer 213 and the transparent substrate 2111.

[0090] In summary, the wavelength conversion device of this application utilizes the refraction and scattering properties of the wavelength conversion material itself to obtain a second excitation light with a Lambertian or approximately Lambertian distribution, thereby eliminating speckle and matching the laser beam. It eliminates the need for additional diffuse reflection structures, reduces the volume of the light source device where the wavelength conversion device is located, and makes the structure of the light source device more compact, while also reducing costs.

[0091] This application also provides a light source device, as described below. Figures 2A to 2E , Figures 3A to 3D as well as Figures 4A to 4B The light source device of this application is described in detail, wherein, Figure 4A This paper shows a schematic diagram of the structure of a light source device according to a specific embodiment of this application. Figure 4B A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown. Figure 4C A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown. Figure 4D A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown. Figure 4E A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown. Figure 4F A schematic diagram of the structure of a light source device according to another specific embodiment of this application is shown.

[0092] The light source device of this application includes a light source 220, a beam splitter 230, and the wavelength conversion device 210 described above. The light source 220 emits a first excitation light, and the beam splitter 230 transmits or reflects the first excitation light to the wavelength conversion device 210. The first excitation light incident on the wavelength conversion device 210 is at least partially incident on the wavelength conversion material 211. The optical path containing the laser light is the first optical path, and the optical path containing the second excitation light is the second optical path. The beam splitter 230 is located on both the first and second optical paths. Exemplarily, the beam splitter 230 includes a dichroic mirror. Exemplarily, the first excitation light emitted by the light source 110 includes blue light.

[0093] In one example, such as Figures 4A to 4CAs shown, when the beam splitter 230 is used to reflect the first excitation light, the first excitation light is incident on the wavelength conversion device 210 to obtain the second excitation light and the received laser. The received laser is reflected by the optical film layer 213 and then passes through the wavelength conversion material 211 to be incident on the beam splitter 230 and transmitted by the beam splitter 230. The second excitation light is transmitted by the optical film layer 213 and then incident on the beam splitter 230 and reflected by the beam splitter 230 to combine with the received laser. Exemplarily, the second excitation light and the received laser are incident on the mutually opposite surfaces of the beam splitter 230.

[0094] In one example, such as Figures 4D to 4F As shown, when the beam splitter is used to transmit the first excitation light, the first excitation light is incident on the wavelength conversion device 210 to obtain the second excitation light and the received laser. The received laser is reflected by the optical film layer 213 and then passes through the wavelength conversion material 211 again to the beam splitter 230 and is reflected by the beam splitter 230. The second excitation light is transmitted by the optical film layer 213 and then to the beam splitter 230 and is transmitted by the beam splitter 230 to combine with the received laser. Exemplarily, the second excitation light and the received laser are incident on the mutually opposite surfaces of the beam splitter 230. Exemplarily, the first and second excitation lights are blue light, and the received laser is yellow light. The received laser and the second excitation light combine to obtain white light. More specifically, the second excitation light and the received laser can form white light with a color temperature greater than 6500K based on their energy and wavelength characteristics. In one example, such as Figure 1 As shown, in related technologies, the light source device transmits and reflects a portion of the first excitation light through the coating of the dichroic mirror 120. The reflected portion of the first excitation light is diffusely reflected by the diffuse reflection structure 140 to obtain the second excitation light. That is, in related technologies, the ratio of the first excitation light to the second excitation light is generally achieved through the coating of the dichroic mirror 120. This results in the color temperature consistency of the light source being too dependent on the coating of the dichroic mirror 120, and the consistency of the coating is difficult to control (e.g., difficult to control within ±1%), thus leading to poor color temperature consistency of the light source. In contrast, the beam splitter 230 in this application either reflects or transmits all of the first excitation light, rather than transmitting and reflecting a portion of the first excitation light, thus avoiding the beam splitter's influence on color temperature consistency. In this application, the ratio of the second excitation light to the laser light is achieved through the wavelength conversion material 211. The thickness consistency of the wavelength conversion material is easier to control; for example, the thickness tolerance of the wavelength conversion material 211 can reach ±0.001 mm, which is more conducive to the control of color temperature consistency.

[0095] In one example, such as Figure 1As shown, in the related technology's light source device, the dichroic mirror 120 transmits and reflects a portion of the first excitation light. Similarly, the dichroic mirror 120 also transmits and reflects a portion of the second excitation light. Only the second excitation light transmitted by the dichroic mirror can combine with the received laser light. Taking blue light as an example, assuming the transmission and reflection ratio of the dichroic mirror for the first and second excitation light is 25%:75%, the blue light that cannot be combined (the second excitation light) accounts for 6.25% (25%*25%) of the blue light emitted by the light source 110. Therefore, out of the 100W of blue light emitted by the light source 110, 6.25W of blue light will be lost. However, the beam splitter 230 in this application either completely reflects the first excitation light or completely transmits both the first and second excitation light. The second excitation light can be completely combined with the received laser light, preventing any loss of excitation light and effectively improving the utilization rate of the excitation light.

[0096] In one example, the wavelength conversion device 210 further includes a light modulation structure 214 located on a first surface of the thermally conductive substrate 211. The light modulation structure 214 is used to reflect the first excitation light incident thereon. The light modulation structure 214 includes a reflective structure and / or a diffuse reflection structure. The light modulation structure 214 surrounds the wavelength conversion material 212. The first excitation light incident on the wavelength conversion device 210 is entirely incident on the wavelength conversion material 211 or entirely incident on the wavelength conversion material 211 and the light modulation structure 214. Exemplarily, the reflective structure included in the light modulation structure 214 is a specular reflection structure.

[0097] In one example, the wavelength conversion material 212 is circular, and the light modulation structure 214 is annular and located outside the wavelength conversion material 212. Specifically, the light modulation structure 214 is located outside the wavelength conversion material in the radial direction, wherein the diameter of the light spot of the first excitation light incident on the wavelength conversion material 210 is greater than or equal to the diameter of the wavelength conversion material 211, and / or, the center of the light spot coincides with the center of the wavelength conversion material 211; or, the wavelength conversion material 212 is annular, and the light modulation structure 214 includes a first light modulation structure 2141 and a second light modulation structure 2142, wherein the first light modulation structure... Both the first optical modulation structure 2141 and the second optical modulation structure 2142 are annular and located on the inner and outer sides of the wavelength conversion material 212, respectively. Specifically, the first optical modulation structure 2141 and the second optical modulation structure 2142 are located on the inner and outer sides of the wavelength conversion material along the radial direction, respectively. The diameter of the light spot of the first excitation light incident on the wavelength conversion material 210 is greater than or equal to the radial width of the wavelength conversion material, and / or, the distance from the center of the light spot to the center of the wavelength conversion material 211 is equal to the median diameter of the wavelength conversion material 211, wherein the median diameter is equal to the average of the diameter of the outer circle and the diameter of the inner circle of the wavelength conversion material 211. Exemplarily, the light spot of the first excitation light incident on the wavelength conversion device 210 is circular. For example, when the wavelength conversion material 211 is circular, the diameter of the light spot of the first excitation light incident on the wavelength conversion device 210 is 0.05mm-0.3mm larger than the diameter of the wavelength conversion material; when the wavelength conversion material 211 is annular, the diameter of the light spot of the first excitation light incident on the wavelength conversion device 210 is 0.05mm-0.3mm larger than the radial width of the wavelength conversion material.

[0098] In one example, the optical axis of the laser beam and the optical axis of the second excitation light are not coaxial when incident on the beam splitter 230, but are coaxial when they are combined after passing through the beam splitter 230. Specifically, the optical axis of the laser beam emitted from the beam splitter 230 is coaxial with the optical axis of the second excitation light emitted from the beam splitter 230. When the beam splitter 230 is used to transmit the first laser beam, the combination of the laser beam and the second excitation light after passing through the beam splitter 230 refers to the combination of the laser beam reflected by the beam splitter 230 and the second excitation light transmitted by the beam splitter 230. When the beam splitter 230 is used to reflect the first laser beam, the combination of the laser beam and the second excitation light after passing through the beam splitter 230 refers to the combination of the laser beam transmitted by the beam splitter 230 and the second excitation light reflected by the beam splitter 230.

[0099] In one example, such as Figures 4A to 4FAs shown, the light source device 200 further includes: a beam-shrinking lens 240, which is disposed between the light source 220 and the beam splitter 230. The first excitation light emitted by the light source 220 is beam-shrinking by the beam-shrinking lens 240 and then incident on the beam splitter 230; and a first converging lens 250, which is disposed between the beam splitter and the wavelength conversion device 210 and located on the first optical path. The first excitation light reflected or transmitted by the beam splitter 230 is converged by the first converging lens and then incident on the wavelength conversion device 210. The light is also reflected by the first converging lens 250, collimated by the first converging lens 250, and then incident on the beam splitter 230. 0; Collimating lens 260, located in the second optical path, is used to collimate the second excitation light; Shaping lens group 270, located in the second optical path, is used to shape the second excitation light so that the size of the light spot of the second excitation light after beam combining through beam splitter 230 is equal to the size of the laser-received light spot after beam combining through beam splitter 230. It is worth noting that the light spot sizes can be approximately equal, with slight deviations within an acceptable range. The light spot of the second excitation light after beam combining through beam splitter 230 overlaps with and is coaxial with the laser-received light spot after beam combining through beam splitter 230. The shaping lens group 260 may include multiple lenses, including but not limited to concave lenses and convex lenses; Reflecting component, located in the second optical path, is used to direct the second excitation light to beam splitter 230 after one or more reflections. The reflecting component may include multiple mirrors, for example... Figures 4A to 4F The light reflection components in the light source device 200 shown include a first reflector 2801, a second reflector 2802, and a second reflector 2803; and a second converging lens 290, through which the second excitation light and the laser beam are combined and then converged before being emitted. For example, the second converging lens 290 guides the combined light to the light outlet of the light source device 200.

[0100] In one example, the size of the second excitation light spot when combined by the beam splitter 230 is equal to the size of the laser-received light spot when combined by the beam splitter 230, and the optical axis of the laser-received light and the optical axis of the second excitation light are coaxial when combined by the beam splitter 230. The size of the second excitation light spot when combined by the beam splitter 230 can be adjusted by adjusting the optical configuration and spacing of the lenses in the shaping lens group 270. For example, the size of the second excitation light spot when combined by the beam splitter 230 can be increased by increasing the spacing between the lenses in the shaping lens group 270 (the spacing along the optical axis of the second excitation light incident on the shaping lens group 270). The optical axis of the second excitation light when combined by the beam splitter 230 can also be adjusted by adjusting the relative positions of the mirrors in the reflecting assembly and the relative positions of the reflecting assembly and the beam splitter 230.

[0101] In one example, such as Figure 1 In the related light source device shown, when the first excitation light is incident on the fluorescent component 130 to generate laser light, the light spot becomes larger due to refraction within the fluorescent component 130. That is, the generated laser light spot is larger than the spots of the first and second excitation light. Taking blue light as the first and second excitation light and yellow light as the laser light, when white light is obtained by combining the light, the blue and yellow light are coaxially positioned. However, because the yellow light spot is larger than the blue light spot, a yellow edge phenomenon appears at the edge of the white light. If this white light is used in scenarios requiring high beam purity, such as stage lighting or architectural lighting, the yellow edge phenomenon will significantly reduce the visual effect. If this white light is used in laser projection equipment, the yellow edge phenomenon will cause color distortion at the image edges. In this application, by setting a shaping lens group 270, the size of the second excitation light spot can be adjusted so that the size of the second excitation light spot after combining with the beam splitter 230 is equal to the size of the laser light spot after combining with the beam splitter 230, thereby effectively eliminating or reducing the yellow edge phenomenon.

[0102] In one example Figure 4A and Figure 4D The wavelength conversion material 211 in the wavelength conversion device 210 of the light source device 200 shown is circular, and the thermally conductive substrate 211 is a non-rotatable thermally conductive substrate. Figure 4B , Figure 4C , Figure 4E as well as Figure 4F The wavelength conversion material 211 in the wavelength conversion device 210 of the light source device 200 shown is annular, and the thermally conductive substrate 211 is a rotatable thermally conductive substrate.

[0103] In one example, the thermally conductive substrate 211 is a transparent substrate, and the wavelength conversion material 212 is annular. The second excitation light is reflected by the reflecting component and passes through the thermally conductive substrate 211 inside the wavelength conversion material 212. Alternatively, the thermally conductive substrate 211 includes a transparent substrate portion 2111 and an opaque substrate portion 2112, with at least a portion of the wavelength conversion material 211 correspondingly disposed on the transparent substrate portion 2111. The wavelength conversion material 211 is annular, and the second excitation light is reflected by the reflecting component and passes through the transparent substrate portion 2111 inside the wavelength conversion material 212. Alternatively, the second excitation light is reflected by the reflecting component and propagates in the space outside the wavelength conversion device 210. Figure 4C and Figure 4F In the light source device shown, the second excitation light is reflected by the reflective component and passes through the thermally conductive substrate 211 inside the wavelength conversion material 212, or the second excitation light is reflected by the reflective component and passes through the transparent substrate portion 2111 inside the wavelength conversion material 212. Figure 4B and Figure 4EIn the illustrated light source device, the second excitation light is reflected by the reflecting component and propagates in the space outside the wavelength conversion device 210. Instead of the second excitation light propagating in the space outside the wavelength conversion device 210 after being reflected by the reflecting component, the second excitation light passes through the thermally conductive substrate 211 inside the wavelength conversion material 212, or through the transparent substrate portion 2111 inside the wavelength conversion material 212 after being reflected by the reflecting component, which reduces the volume of the light source device 200. For example, when the second excitation light passes through the thermally conductive substrate 211 inside the wavelength conversion material 212 after being reflected by the reflecting component, or when the second excitation light passes through the transparent substrate portion 2111 inside the wavelength conversion material 212 after being reflected by the reflecting component, the thermally conductive substrate 211 is a rotatable thermally conductive substrate.

[0104] In summary, the light source device of this application, including the wavelength conversion device described above, utilizes the refraction and scattering properties of the wavelength conversion material itself to obtain a second excitation light with a Lambertian or approximately Lambertian distribution, thereby eliminating speckle and matching the laser beam. This eliminates the need for an additional diffuse reflection structure, reducing the volume of the light source device and making its structure more compact, while also lowering costs. Furthermore, the beam splitter element transmits or reflects both the first and second excitation lights, avoiding excitation light loss, improving excitation light utilization, and preventing the beam splitter element from affecting color temperature consistency. Additionally, the use of a shaping lens group ensures that the size of the second excitation light spot after beam splitting is equal to the size of the laser beam spot after beam splitting, effectively eliminating or reducing the yellow edge effect.

[0105] Furthermore, this application also provides a method for controlling a light source device, used to control the aforementioned light source device, comprising: improving an imaging system; matching the light inlet of the imaging system with the light outlet of the light source device, the imaging system including a display; turning on the light source of the light source device so that the image of the light spot of the first excitation light incident on the wavelength conversion device is imaged on the display; and adjusting the light source device based on the image of the light spot displayed on the display. Exemplarily, the imaging system includes a charge-coupled device (CCD) imaging system. Exemplarily, the light source 220 can be lit with a small current; for example, if the rated current of the light source 220 is 3A, the light source 220 can be lit with a current not exceeding 20% ​​of its rated current, preferably less than 10% of the rated current.

[0106] In one example, due to the influence of the manufacturing precision of each component in the light source device 200 and the installation and fixing precision between them, the position of the first excitation light incident on the wavelength conversion device 210 may have a large deviation, which may affect the optical efficiency and may aggravate the yellow edge effect. By adjusting the light source device 200, higher optical efficiency can be obtained and the yellow edge effect can be better eliminated.

[0107] In one example, the light source device 200 further includes a first converging lens 250 disposed between the beam splitter 230 and the wavelength conversion device 210 and located on the first optical path. The first excitation light reflected or transmitted by the beam splitter 230 is focused by the first converging lens and then incident on the wavelength conversion device 210. The laser light is reversed and passes through the first converging lens 250, collimated by the first converging lens 250, and then incident on the beam splitter 230. The light source device 200 is adjusted, including: when the wavelength conversion material 211 of the wavelength conversion device 210 is circular, adjusting the first excitation light in directions perpendicular to and parallel to the optical axis of the first excitation light incident on the wavelength conversion device 210. The positions of the converging lens 250 and the wavelength conversion device 210 are adjusted such that the center of the light spot coincides with the center of the wavelength conversion material 211, and the diameter of the light spot is greater than or equal to the diameter of the wavelength conversion material 211. When the wavelength conversion material 211 is annular, the positions of the first converging lens 250 and the wavelength conversion device 210 are adjusted along directions perpendicular to and parallel to the optical axis of the first excitation light incident on the wavelength conversion device 210, respectively, so that the distance between the center of the light spot and the center of the wavelength conversion material 211 is equal to the median diameter of the wavelength conversion material 211, and the diameter of the light spot is greater than or equal to the radial width of the wavelength conversion material 211. Exemplarily, the positions of the first converging lens 250 and the wavelength conversion device 210 can be adjusted along directions perpendicular to and / or parallel to the optical axis of the first excitation light incident on the wavelength conversion device 210, respectively, using an adjustment device. This adjustment device may include, but is not limited to, translation stages, adjustment frames, optical guide systems, six-axis adjustment platforms, and magnetic lens mounts.

[0108] In addition, this application also provides a light projection system, which includes the aforementioned light source device, and the light beam emitted from the light source device serves as an illumination beam. Exemplarily, the light projection system of this application includes a projection system or an illumination source system, wherein the projection system can be a projector, and the illumination source system can be a stage lighting system or an architectural lighting system.

[0109] In one example, when the light projection system is a projection system, the projection system also includes a projection component, such as an optical engine, for emitting a projection beam and projecting an image, such as displaying an image, or video, on a display interface like a screen. It can also be an audio-visual integrated device. Exemplarily, the projection system includes various elements for performing projection functions, such as a projection component, an image processing unit for performing image processing on external video signals (e.g., A / D conversion, synchronization signal separation, rewriting / reading data from the frame memory), and a drive unit for driving the display device based on image data from the image processing unit.

[0110] The light source device can be part of the projection assembly, which can also include the projection lens for emitting the projection beam converted from the illumination beam.

[0111] The projection assembly may also include an optical engine assembly, which converts the illumination beam into an image beam. The projection lens, on the other hand, converts the image beam into a projection beam and transmits the projection beam to form an image, such as an image on a screen, for the user to view.

[0112] The projection system also includes a data transmission interface (not shown) for receiving image data information or video data information to be projected from the outside, and outputting the image data information or video data information to be projected to the projection component.

[0113] The projection system also includes a power interface (not shown), which is used to connect to an external power source to supply power to the projection system so that the projection system can function properly.

[0114] Since the light source device of the light projection system of this application has the aforementioned advantages, the light projection system in the embodiments of this application also has the aforementioned advantages.

[0115] Although several embodiments have been described herein, it should be understood that many other modifications and embodiments will arise in the mind of those skilled in the art, all of which will fall within the spirit and scope of the concept disclosed herein. More specifically, various modifications and changes may be made in terms of the arrangement and / or components of the subject matter within the scope of this disclosure, the drawings, and the appended claims. In addition to modifications and changes in the components and / or arrangement, the use of alternative methods will also be obvious to those skilled in the art.

Claims

1. A wavelength conversion device, characterized in that, include: A thermally conductive substrate, the thermally conductive substrate including a first surface and a second surface; The second surface is the surface on the thermally conductive substrate that is opposite to the first surface; A wavelength conversion material is disposed on the first surface of the thermally conductive substrate or embedded in the thermally conductive substrate, for converting a portion of the first excitation light incident thereon into laser-received light and transmitting a portion of the first excitation light to form a second excitation light, wherein the laser-received light and the second excitation light are used to combine light; An optical film layer is disposed on the side of the wavelength conversion material opposite to the incident first excitation light, for reflecting the laser beam and transmitting the second excitation light; The thermally conductive substrate is an opaque thermally conductive substrate; or The thermally conductive substrate is a transparent thermally conductive substrate; or The thermally conductive substrate includes a transparent substrate portion and an opaque substrate portion, with at least a portion of the wavelength conversion material disposed on the transparent substrate portion.

2. The wavelength conversion device according to claim 1, characterized in that, When the wavelength conversion material is embedded in the thermally conductive substrate, the surface of the wavelength conversion material that receives the first excitation light is defined as the incident surface. The incident surface is flush with the first surface of the thermally conductive substrate, and the total thickness of the wavelength conversion material and the optical film is equal to the thickness of the thermally conductive substrate.

3. The wavelength conversion device according to claim 2, characterized in that, The thickness of the transparent substrate portion is equal to the thickness of the opaque substrate portion; or The thickness of the transparent substrate portion is less than the thickness of the opaque substrate portion. The surface of the wavelength conversion material receiving the first excitation light is defined as the incident surface. The incident surface is flush with the first surface of the opaque substrate portion, and the total thickness of the wavelength conversion material, the optical film layer, and the transparent substrate portion is equal to the thickness of the opaque substrate portion.

4. The wavelength conversion device according to claim 1, characterized in that, It also includes a light modulation structure disposed on a first surface of the thermally conductive substrate, the light modulation structure being used to reflect the first excitation light incident thereon, the light modulation structure including a reflective structure and / or a diffuse reflective structure, the light modulation structure surrounding the wavelength conversion material.

5. The wavelength conversion device according to claim 4, characterized in that, The wavelength conversion material is circular, and the optical modulation structure is annular and located outside the wavelength conversion material; or The wavelength conversion material is in the shape of a ring, and the optical modulation structure includes a first optical modulation structure and a second optical modulation structure. The first optical modulation structure, the second optical modulation structure, and the second optical modulation structure are all in the shape of a ring and are located on the inner and outer sides of the wavelength conversion material, respectively. The light modulation structure is set independently from the thermally conductive substrate, or the light modulation structure is integrally formed with the thermally conductive substrate.

6. A light source device, characterized in that, The light source device includes a light source, a beam splitter, and a wavelength conversion device as described in any one of claims 1-5, wherein... The light source is used to emit a first excitation light; The beam splitter is used to transmit or reflect the first excitation light to the wavelength conversion device. The first excitation light incident on the wavelength conversion device is at least partially incident on the wavelength conversion material. The optical path where the laser is located is the first optical path, the optical path where the second excitation light is located is the second optical path, and the beam splitter is located on the first optical path and the second optical path. When the beam splitter is used to transmit the first excitation light, the laser beam is incident on the beam splitter and reflected by the beam splitter, and the second excitation light is incident on the beam splitter and transmitted by the beam splitter to combine with the laser beam. When the beam splitter is used to reflect the first excitation light, the laser beam is incident on the beam splitter and transmitted by the beam splitter, and the second excitation light is incident on the beam splitter and reflected by the beam splitter to combine with the laser beam.

7. The light source device according to claim 6, characterized in that, The wavelength conversion device further includes a light modulation structure disposed on a first surface of the thermally conductive substrate. The light modulation structure is used to reflect the first excitation light incident thereon. The light modulation structure includes a reflection structure and / or a diffuse reflection structure. The light modulation structure surrounds the wavelength conversion material. The first excitation light incident on the wavelength conversion device is entirely incident on the wavelength conversion material or entirely incident on both the wavelength conversion material and the light modulation structure. The wavelength conversion material is circular, and the light modulation structure is annular and located outside the wavelength conversion material. The diameter of the light spot of the first excitation light incident on the wavelength conversion device is greater than or equal to the diameter of the wavelength conversion material, and / or the center of the light spot coincides with the center of the wavelength conversion material; or The wavelength conversion material is annular, and the light modulation structure includes a first light modulation structure and a second light modulation structure. Both the first light modulation structure and the second light modulation structure are annular and are located on the inner and outer sides of the wavelength conversion material, respectively. The diameter of the light spot is greater than or equal to the radial width of the wavelength conversion material, and / or the distance from the center of the light spot to the center of the wavelength conversion material is equal to the median diameter of the wavelength conversion material.

8. The light source device according to claim 7, characterized in that, The optical axis of the laser beam and the optical axis of the second excitation beam are not coaxial when incident on the beam splitter, but are coaxial when combined by the beam splitter.

9. The light source device according to claim 7, characterized in that, Also includes: A beam-shrinking lens is disposed between the light source and the beam-splitting element, wherein the first excitation light emitted by the light source is shrunken by the beam-shrinking lens and then incident on the beam-splitting element; A first converging lens is disposed between the beam splitter and the wavelength conversion device and located on the first optical path. The first excitation light reflected or transmitted by the beam splitter is converged by the first converging lens and then incident on the wavelength conversion device. The laser beam is collimated by the first converging lens and then incident on the beam splitter. A collimating lens, located in the second optical path, is used to collimate the second excitation light; A shaping lens group, located on the second optical path, is used to shape the second excitation light so that the size of the light spot of the second excitation light when it is combined by the beam splitter is greater than or equal to the size of the laser-received light spot when it is combined by the beam splitter. A reflective component, located in the second optical path, is used to direct the second excitation light to the beam-splitting element after one or more reflections. The second converging lens is used to converge the second excitation light and the laser beam received before they are emitted.

10. The light source device according to claim 9, characterized in that, The thermally conductive substrate is a transparent substrate, the wavelength conversion material is in the shape of a ring, and the second excitation light is reflected by the reflective component and passes through the thermally conductive substrate inside the wavelength conversion material. or The thermally conductive substrate includes a transparent substrate portion and an opaque substrate portion. At least a portion of the wavelength conversion material is disposed on the transparent substrate portion. The wavelength conversion material is annular. The second excitation light is reflected by the reflective component and passes through the transparent substrate portion inside the wavelength conversion material; or The second excitation light is reflected by the reflective component and then propagates in the space outside the wavelength conversion device.

11. A light projection system, characterized in that, The light projection system includes the light source device according to any one of claims 6-10.

Images