Light source assembly and projection device

Abstract

The utility model provides a light source assembly and a projection device, and the light source assembly comprises a laser light source which is configured to emit first light; the light uniformizing piece is arranged on the light emitting side of the laser light source; the first LED light source is configured to emit second light rays; the first light combination part is arranged on the light path of the first light and the second light, and the first light combination part is configured to mix the first light and the second light and output first mixed light. According to the light source assembly, the utilization efficiency can be improved, the color gamut and the brightness can be increased, the speckle problem generated by the laser light source can be reduced, and the display image quality is better.

Description

Technical Field

[0001] This utility model relates to the field of projection display technology, and in particular to a light source component and a projection device. Background Technology

[0002] In projection devices, the light source is a crucial component. Traditional light source components include xenon lamps, ultra-high pressure gas discharge lamps (UHP, etc.), LEDs, laser-excited phosphors, and lasers (RGB Laser / single, dual, and tri-color) light sources. Traditional bulbs are increasingly being phased out due to their inherent limitations, while newer light sources such as pure tri-color lasers exhibit superior characteristics in terms of brightness, color, lifespan, and energy consumption, gradually becoming the mainstream light source for projection displays.

[0003] Laser light sources are renowned for their high brightness and wide color gamut, but the strong coherence of lasers also introduces speckle problems. This issue negatively impacts the viewing experience, manifesting as uneven light spots on the screen and reducing viewing comfort. Therefore, effectively solving the speckle problem while maintaining the advantages of high brightness and wide color gamut from laser light sources has become a critical technical challenge that urgently needs to be addressed in the field of projection devices. Utility Model Content

[0004] This application provides a light source component and a projection device. The light source component can improve utilization efficiency, increase color gamut and brightness, and reduce speckle problems caused by laser light sources, resulting in better display quality.

[0005] This application provides a light source assembly, including:

[0006] A laser source, configured to emit a first ray;

[0007] A light homogenizer is disposed on the light-emitting side of the laser source;

[0008] A first LED light source, configured to emit a second light beam;

[0009] A first light combiner is disposed in the optical path of the first light ray and the second light ray, and the first light combiner is configured to mix the first light ray and the second light ray and output a first mixed light ray.

[0010] This application also provides a projection device, including the above-described light source assembly.

[0011] The light source assembly and projection device provided in this application integrate the advantages of both laser and LED light sources, significantly improving light energy utilization efficiency, expanding the color gamut, and enhancing brightness performance. Furthermore, addressing the potential speckle problem of laser light sources, this embodiment employs a light homogenizer placed on the light-emitting side of the laser light source to homogenize the first light beam, ensuring uniformity and consistency in light distribution. This aims to further optimize display quality and ensure users enjoy a more delicate and clear viewing experience. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a first structure of a light source assembly provided in an embodiment of this application.

[0014] Figure 2 This is a schematic diagram of a second structure of the light source assembly provided in an embodiment of this application.

[0015] Figure 3 The spectrum of red laser provided for an embodiment of this application.

[0016] Figure 4 The spectrum of blue light provided in the embodiments of this application.

[0017] Figure 5 The spectrum of green fluorescence provided in the embodiments of this application.

[0018] Figure 6 The combined light spectrum of red laser light, blue light, and green fluorescence provided for embodiments of this application.

[0019] Figure 7 This is a schematic diagram of the projection device provided in an embodiment of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] This application provides a light source assembly and a projection device. The light source assembly improves utilization efficiency, increases color gamut and brightness, and reduces speckle issues caused by laser light sources, resulting in superior image quality. The following detailed description is provided in conjunction with the accompanying drawings.

[0022] Please see Figure 1 , Figure 1 This is a schematic diagram of a first structure of a light source assembly provided in an embodiment of this application.

[0023] This application provides a light source assembly 100, including a laser light source 101, a light homogenizer 102, a first LED (Light Emitting Diode) light source, and a first light combiner 104.

[0024] The laser light source 101 is a light source capable of emitting laser beams. It features high brightness, good directionality, and good monochromaticity, and is often used in projection displays to provide high brightness and high color gamut light.

[0025] The light homogenizer 102 is an optical component used to homogenize light. Through specific optical design or mechanical structure, it makes the light emitted by the laser source 101 more uniform in distribution, thereby reducing unevenness in brightness.

[0026] An LED light source is a semiconductor device that converts electrical energy into light energy. In projection displays, LED light sources are widely used due to their advantages such as low power consumption, long lifespan, and ease of control.

[0027] A beam combiner is an optical component used to combine light of different colors or types into a single beam. In projection displays, beam combiners are typically used to combine two or three of the three primary colors of light—red, green, and blue—to form a color image.

[0028] The laser light source 101 is configured to emit the first beam of light. The light emitted by the laser light source 101 often has uneven brightness in the light spot, which affects the image quality of the projected display.

[0029] To address this issue, the light homogenizer 102 in this embodiment is disposed on the light-emitting side of the laser source 101. Through specific optical design or mechanical structure, the light homogenizer 102 homogenizes the light emitted by the laser source 101, thereby reducing unevenness in brightness and improving the image quality of the projected display.

[0030] The first LED light source 103 is configured to emit a second light beam. LED light sources are widely used in projection displays due to their advantages such as low power consumption, long lifespan, and ease of control. By combining the laser light source 101 and the LED light source, the light source assembly 100 of this embodiment not only possesses high brightness and a wide color gamut, but also reduces energy consumption and extends service life to a certain extent.

[0031] A first light combiner 104 is disposed in the optical path of the first and second light rays. The first light combiner 104 is configured to mix the first and second light rays and output a first mixed light ray. The core function of the first light combiner 104 is to effectively combine the first and second light rays into a single beam, i.e., the first mixed light ray. To achieve this goal, the light combiner may include optical elements such as mirrors, lenses, prisms, or other optical elements with selective transmission. These optical elements are arranged and combined in a specific manner to ensure that the light rays can undergo correct refraction, reflection, or interference when passing through, thereby achieving the mixing of light rays.

[0032] In the embodiments provided in this application, the light emitted from the laser light source 101 and the first LED light source 103 is mixed and then utilized. Simultaneously, a light-diffusing element 102 is specifically provided at the laser light source 101. This design not only cleverly maintains the advantage of a small single light source size but also greatly reduces the difficulty of combining light from different light sources. More importantly, this solution effectively alleviates the speckle problem caused by the laser light source, thereby ensuring the purity and delicacy of the projected image quality. Furthermore, thanks to the combination of the laser light source 101 and the first LED light source 103, the light source assembly 100 can present a higher color gamut and brightness level, allowing users to enjoy a higher quality and more comfortable viewing experience. Overall, this innovative light source combination and light-diffusing design brings significant image quality improvement and user experience optimization to the projection device.

[0033] It is worth mentioning that the color of the first ray can be the same as or different from the color of the second ray.

[0034] When the first and second light rays are of the same color, overall brightness and lifespan can be improved. In projection displays, brightness and lifespan are important indicators for evaluating the performance of the light source assembly 100. By using laser light source 101 and first LED light source 103 of the same color and effectively combining them, the light intensity can be significantly enhanced, thereby improving the brightness of the projection display. At the same time, due to the long lifespan of LED light sources, this design also helps to extend the lifespan of the entire light source assembly 100 and reduce maintenance costs.

[0035] When the first and second light rays are of different colors, greater emphasis is placed on expanding the color spectral width. In color projection displays, color spectral width is a key factor determining color richness and realism. By cleverly selecting the first and second light rays emitted from the laser light source 101 and the first LED light source 103, and mixing them, the color spectral range of the light can be significantly broadened, resulting in more vibrant and saturated colors in the projected display. For example, when the first light ray is red, the red laser, due to its longest linewidth and longest coherence length (coherence time), often produces severe interference phenomena, leading to speckle problems. In this case, homogenizing the red laser using the homogenizer 102 can effectively reduce or even eliminate speckle, improving the image quality of the projected display. Simultaneously, when the second light ray is blue, the introduction of the blue LED light source not only forms a complementary color with the red laser, enhancing the overall color performance of the light source, but also reduces energy consumption to a certain extent, improving the energy efficiency of the light source component 100.

[0036] The light-diffusing component 102 can be a diffuser plate, also known as a scattering plate. As a highly efficient and widely used light-diffusing component 102, its unique optical properties make it an ideal choice for adjusting light distribution. Through the careful design of its surface microstructure, the diffuser plate can effectively scatter incident light over a wider range of angles, thereby achieving uniform light distribution. This characteristic is crucial for reducing the non-uniformity of light spots and improving the uniformity of image and brightness.

[0037] The light source assembly 100 also includes a braking element connected to the light homogenizer 102. The braking element is configured to drive the light homogenizer 102 to move, thereby dynamically adjusting the position of the light homogenizer 102 through mechanical movement, thereby indirectly changing the specific position of the first light ray incident on the first light combining element 104.

[0038] The braking component can change the position of the light homogenizer 102 by translational vibration or shaking, thereby changing the position of the first light ray incident on the first light combining component 104. After the first light ray enters the light homogenizer 102, it can increase the divergence angle of the first light ray, which can play a certain role in homogenizing the light spot. When the vibration of the braking component reaches a certain frequency, it helps to improve the speckle effect.

[0039] The braking component precisely adjusts the position of the homogenizing component 102 by means of translational vibration, i.e., linear reciprocating motion along a specific direction, such as a direction perpendicular to the optical axis. With a slight change in the position of the braking component, the angle and position of the first ray incident on the diffuser plate also change, thus affecting the scattering effect and the uniformity of the light spot after passing through the diffuser plate. After passing through the diffuser plate, the originally concentrated light is scattered to a wider angle, and the vibration of the braking component further promotes the uniform distribution of these scattered rays in space. This dynamic adjustment process not only enhances the uniformity of the light but also improves the overall performance and stability of the light source assembly 100.

[0040] It is worth noting that the dynamic adjustment process of the braking component not only further optimizes the uniformity of the light spot but also helps improve the speckle effect. Speckle is a common problem in laser projection, causing grainy, uneven spots on the image and affecting the viewing experience. By driving the homogenizing component 102 to vibrate at high frequency through the braking component, the coherence of the laser can be effectively broken, thereby reducing speckle formation and improving image clarity and detail.

[0041] Specifically, the braking component includes a coil and a magnetic component. The coil is connected to the light homogenizer 102, and the relative position of the magnetic component to the laser source 101 remains fixed. The coil is configured to generate a magnetic field, which interacts with the magnetic component to change the relative position of the light homogenizer 102 and the laser source 101. In the light source assembly 100, the position of the magnetic component relative to the laser source 101 is fixed; this design ensures that the interaction between the magnetic field and the magnetic component is stable and continuous. When the magnetic field generated by the coil encounters the magnetic component, an interaction force is generated between them, which drives the magnetic component (and the connected light homogenizer 102) to move along a specific direction.

[0042] This design allows for precise control of the position of the light-diffusing element 102. When an external power source is connected and the coil generates a magnetic field, an interaction force is generated between the magnetic field and the magnetic element, driving the light-diffusing element 102 to move. As the magnetic field strength changes, the moving speed and position of the light-diffusing element 102 also change accordingly, thus achieving precise control of the light distribution.

[0043] By adjusting the magnitude and direction of the current in the coil, the strength and direction of the magnetic field can be precisely controlled, thereby achieving precise control of the position of the light-diffusing element 102.

[0044] In some embodiments, the first light combining member 104 includes a first color combining mirror, which is obliquely disposed in the optical path of the first light ray and the second light ray. The first color combining mirror is configured to transmit the first light ray and reflect the second light ray, and to integrate the first light ray and the second light ray into the optical path in the same direction. At the same time, it can also integrate the two light rays into the optical path in the same direction, thereby realizing the effective convergence and transmission of light.

[0045] To achieve this function, the first color-combining mirror is often designed as a plane mirror, which not only simplifies the manufacturing process but also improves the transmission efficiency and stability of light. The plane mirror has two parallel sides, a first side and a second side, which form specific angles with the first and second light rays, respectively. In specific embodiments, the angle between the first side and the first light ray is typically set to 45°. This angle selection not only ensures that the first light ray can pass through the first color-combining mirror without obstruction but also maintains high stability and uniformity of light transmission.

[0046] Similarly, the angle between the second side and the second ray is also set to 45°. This design allows the second ray to undergo total internal reflection on the color-combining mirror, thus effectively guiding it in the same direction as the first ray. This design not only improves the utilization rate of light but also reduces light loss and interference during transmission.

[0047] It is worth noting that in practical applications, the first color-combining mirror can be customized and optimized according to the needs of different optical systems to meet various complex light integration and transmission requirements. For example, the first color-combining mirror can be a dichroic film layer, which is a special optical thin film that can exhibit different optical properties in different wavelength ranges. Specifically, this film layer can be designed to have high transmittance for light of a specific wavelength and high reflectivity for light of another wavelength.

[0048] For example, when the first light beam is red laser and the second light beam is blue light, the red laser beam will be transmitted through the dichroic film because its wavelength matches the design parameters of the film, and will continue to propagate along the predetermined optical path. The blue light, however, will be reflected by the film because its wavelength matches the reflectivity of the film, thus changing its propagation direction.

[0049] It is worth noting that although red laser and blue light are mentioned in the embodiments of this application, the design of the first color combining mirror is not actually limited to these two types of light. By adjusting the material and structural parameters of the dichroic film layer, the transmission and reflection characteristics of light of different wavelengths can be customized and optimized. This flexibility allows the first color combining mirror to be widely used in various complex optical systems to meet different light integration and transmission needs.

[0050] Please see Figure 2, Figure 2 This is a second structural schematic diagram of the light source assembly provided in an embodiment of this application. The light source assembly 100 also includes a first compound eye lens 105, which is disposed between the light homogenizer 102 and the first color combining mirror. A compound eye lens (also known as a fly-eye lens) is a special type of lens assembly, which consists of multiple tiny lens units, which are usually arranged in a matrix. Each lens unit independently focuses light, thereby forming a uniform light distribution across the entire lens surface.

[0051] In some cases, even after processing by the light homogenizer 102, some unevenness in the light may still exist. To further improve this situation, a first compound eye lens 105 is introduced into the system.

[0052] The first compound eye lens 105 consists of multiple tiny lens units arranged closely together to form a structure similar to a compound eye. When light rays pass through the beam homogenizer 102, they enter the first compound eye lens 105. Because each lens unit has independent focusing capability, the light rays are uniformly controlled as they pass through these lens units. This control not only helps eliminate non-uniformity in the light rays but also ensures that the light rays maintain high stability and consistency during subsequent propagation.

[0053] In some embodiments, the light source assembly 100 further includes a fluorescent light source 106 and a second light combiner 107. The fluorescent light source 106 is configured to emit a third ray, and the second light combiner 107 is disposed in the optical path of the third ray and the first mixed ray. The second light combiner 107 is configured to mix the first mixed ray and the third ray and output a second mixed ray. On the one hand, the versatility and customizability of the fluorescent light source 106 provide the optical system with abundant light resources, enabling the system to select the most suitable light for transmission and processing as needed. On the other hand, the efficient mixing capability of the second light combiner 107 ensures the uniformity and stability of the light, improving the overall performance and reliability of the optical system.

[0054] The fluorescent light source 106 includes a second LED light source and a phosphor layer. The phosphor layer is disposed on the light-emitting side of the second LED light source. The light emitted by the second LED light source excites fluorescence to produce a third light. For example, the second LED light source typically emits light of a specific wavelength, such as ordinary blue light. This light has high energy and good directionality, which can effectively excite the phosphor layer, thereby producing the desired fluorescence.

[0055] The phosphor layer is located on the light-emitting side of the second LED light source. It is typically composed of one or more fluorescent substances that emit light of a different wavelength when excited by light of a specific wavelength. For example, when ordinary blue light emitted from the second LED light source shines on the phosphor layer, the fluorescent substances absorb this blue light and re-emit it as green light within a short time. This process not only achieves wavelength conversion of light but also improves light utilization and the overall performance of the system.

[0056] The second light combining element 107 includes a second color combining mirror, which is obliquely disposed in the optical path of the first mixed light and the third light. The second color combining mirror is configured to transmit the first mixed light and reflect the third light, and to integrate the first mixed light and the third light into the optical path in the same direction.

[0057] Similar to the first light combiner 104, the second color combiner is configured to transmit a first mixed ray and reflect a third ray. The first mixed ray is the ray integrated by previous optical elements (such as the first light combiner 104), and it contains components of multiple wavelengths. The third ray is a specific wavelength ray from the fluorescent light source 106. When these two rays are simultaneously incident on the second color combiner, the second color combiner processes them separately according to their specific spectral characteristics.

[0058] For the first mixed light ray, the second color-combining mirror allows most of its components to pass through and continue propagating along the predetermined light path. During this process, the wavelength, polarization state, and other characteristics of the light are preserved, thus ensuring the stability and consistency of the light.

[0059] For the third ray, the second color-combining mirror uses its reflective properties to guide it in the same direction as the first mixed ray. This reflection process not only changes the propagation direction of the third ray but also allows it to spatially overlap with the first mixed ray, forming a second mixed ray. This integration process not only improves the utilization rate of light but also simplifies the structure of the optical system, making the system more compact and efficient.

[0060] The second color-combining mirror is often designed as a plane mirror, which not only simplifies the manufacturing process but also improves the transmission efficiency and stability of light. The plane mirror has two parallel sides, a first side and a second side, which form specific angles with the first mixed ray and the third ray, respectively. In specific embodiments, the angle between the first side and the first mixed ray is typically set to 45°. This angle selection not only ensures that the first mixed ray can pass through the second color-combining mirror without obstruction but also maintains high stability and uniformity of light transmission.

[0061] Similarly, the angle between the second side and the third ray is also set at 45°. This design allows the third ray to undergo total internal reflection on the color-combining mirror, thus effectively guiding it in the same direction as the first mixed ray. This design not only improves the utilization rate of light but also reduces light loss and interference during transmission.

[0062] For example, the second color-combining mirror can be a dichroic film layer, a special type of optical thin film that exhibits different optical properties within different wavelength ranges. Specifically, this film layer can be designed to have high transmittance for a specific wavelength of light and high reflectivity for another wavelength. For instance, if the first light is red laser light, the second light is blue light, and the third light is green fluorescence, then the first mixed light is red and blue light. Since the wavelengths of red and blue light match the design parameters of the dichroic film layer, they will be transmitted through the film layer and continue to propagate along the predetermined optical path. Green light, on the other hand, will be reflected by the film layer because its wavelength matches the reflectivity of the film layer, thus changing its propagation direction.

[0063] Please continue reading. Figure 2 The light source assembly 100 also includes a first relay lens 108, which is disposed between the first light combiner 104 and the second light combiner 107. The first relay lens 108 can collimate or focus the first mixed light beam (first light beam and second light beam) output from the first light combiner 104, ensuring that the light enters the second light combiner 107 in the optimal state, reducing light energy loss and improving the synthesis efficiency and uniformity of subsequent light beams. Furthermore, the use of the first relay lens 108 makes the entire optical path design more flexible, facilitating adjustments to the light transmission path and angle according to actual needs.

[0064] The light source assembly 100 also includes a second compound eye lens 109, which is disposed on the light-emitting side of the second light combiner 107, i.e., in the optical path of the second mixed light. The second compound eye lens 109 is composed of multiple microlens units, each of which can fine-tune the light, thereby achieving uniform distribution of the light and effective control of the diffusion angle.

[0065] The light source assembly 100 also includes a second relay lens 110, which is disposed on the light-emitting side of the second compound eye lens 109. The core function of the second relay lens 110 is to further collimate or focus the light after it has been processed by the second compound eye lens 109. Since the second compound eye lens 109 is mainly responsible for the uniform distribution of light and the control of the diffusion angle, and the second mixed light may undergo slight deflection or diffusion after passing through the compound eye lens, the second relay lens 110 reprocesses the second mixed light to ensure that the light enters the subsequent optical elements or illumination area in the best possible condition.

[0066] The light source assembly 100 also includes one or more first collecting lenses 111. These first collecting lenses 111 are disposed on the light-emitting side of the first LED light source 103, and can improve the light-emitting performance of the second light beam to ensure that the second light beam is projected onto the first light combining member 104 at a preset angle. The first collecting lens 111 can be a convex lens. The first collecting lens 111 can significantly enhance the collimation or focusing of the second light beam, ensuring that the light is accurately projected onto the first light combining member 104 at a preset angle. This design not only improves the utilization rate of light energy and reduces scattering loss, but also makes the light more orderly in the subsequent synthesis process, which is beneficial to improving the quality of the final synthesized light.

[0067] Similarly, the light source assembly 100 also includes one or more second collecting lenses 112. These second collecting lenses 112 are disposed on the light-emitting side of the second LED light source and can improve the light emission performance of the third light beam, ensuring that the third light beam can be incident on the second light combining member 107 at a preset angle. The second collecting lens 112 can be a convex lens. By precisely adjusting the directionality and focusing state of the third light beam, the second collecting lens 112 ensures that the light beam can be incident on the second light combining member 107 efficiently and accurately.

[0068] In some cases, the first ray is red, the second ray is blue, and the third ray is green; light from different wavelength ranges can complement each other, presenting a broadband light source. For example... Figures 3 to 6 , Figure 3 The spectrum of red laser provided in the embodiments of this application is as follows. Figure 4 The spectrum of blue light provided in the embodiments of this application. Figure 5 The spectrum of green fluorescence provided in the embodiments of this application is as follows. Figure 6 The combined light spectrum of red laser light, blue light, and green fluorescence provided for embodiments of this application. From... Figures 3 to 6 As can be seen, the light source component 100 provided in this application embodiment has a continuously ultrawide spectrum.

[0069] Please see Figure 7 , Figure 7 This is a schematic diagram of the projection device provided in an embodiment of this application.

[0070] This application provides a projection device 1, including the light source assembly 100 in the above embodiments. The projection device 1 also includes an imaging display assembly 200, wherein the light emitted from the light source assembly 100 enters the imaging display assembly 200 to achieve image output.

[0071] The first beam of light (red laser) emitted from the laser source 101 passes through the dithering light homogenizer 102, then through the first compound eye lens 105, and then through the first light combiner 104 to enter the first relay lens 108 for beam shaping. Subsequently, it is transmitted through the second light combiner 107, then through the second compound eye lens 109 for light homogenization, and then enters the second relay lens 110. Finally, it enters the imaging display component 200 for projection display.

[0072] The second light ray (blue light) emitted from the first LED light source 103 is collected by the first collecting lens 111 and then incident on the first light combiner 104. It is reflected by the first light combiner 104 and enters the first relay lens 108. After beam shaping, it enters the second light combiner 107. Then, after being homogenized by the second compound eye lens 109, it is incident on the second relay lens 110 and finally incident on the imaging display component 200 for projection display.

[0073] The third light ray (green light) emitted from the second LED light source is collected by the second collecting lens 112 and then incident on the second light combining member 107. After being homogenized by the second compound eye lens 109, it is incident on the second relay lens 110 and finally incident on the imaging display component 200 for projection display.

[0074] The light source assembly 100 and projection device 1 provided in this application embodiment integrate the advantages of both laser and LED light sources, significantly improving light energy utilization efficiency, expanding the color gamut, and enhancing brightness performance. Furthermore, addressing the potential speckle problem of the laser light source 101, this embodiment employs a light homogenizer 102 positioned on the light-emitting side of the laser light source 101 to homogenize the first light beam, ensuring uniformity and consistency in light distribution. This aims to further optimize display quality and ensure users enjoy a more delicate and clear viewing experience.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0077] The light source components and projection devices provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A light source assembly, characterized by include: A laser source, configured to emit a first ray; A light homogenizer is disposed on the light-emitting side of the laser source; A first LED light source, configured to emit a second light beam; A first light combiner is disposed in the optical paths of the first light ray and the second light ray, and the first light combiner is configured to mix the first light ray and the second light ray and output a first mixed light ray. A braking element is connected to the light homogenizer and configured to drive the light homogenizer to move. The braking element includes a coil and a magnetic element. The coil is connected to the light homogenizer, and the relative position of the magnetic element and the laser source is fixed. The coil is configured to generate a magnetic field, and the magnetic field interacts with the magnetic element to change the relative position of the light homogenizer and the laser source.

2. The light source assembly according to claim 1, characterized in that, The first light combining element includes a first color combining mirror, which is obliquely disposed in the optical path of the first light ray and the second light ray. The first color combining mirror is configured to transmit the first light ray and reflect the second light ray, and to integrate the first light ray and the second light ray into the optical path in the same direction.

3. The light source assembly according to claim 2, characterized in that, It also includes a first compound eye lens, which is disposed between the light homogenizer and the first color-combining mirror.

4. The light source assembly according to claim 1, characterized in that, It also includes a fluorescent light source and a second light combiner. The fluorescent light source is configured to emit a third light ray, and the second light combiner is disposed in the optical path of the third light ray and the first mixed light ray. The second light combiner is configured to mix the first mixed light ray and the third light ray and output a second mixed light ray.

5. The light source assembly according to claim 4, characterized in that, The second light combining element includes a second color combining mirror, which is obliquely disposed in the optical path of the first mixed light and the third light. The second color combining mirror is configured to transmit the first mixed light and reflect the third light, and to integrate the first mixed light and the third light into the optical path in the same direction.

6. The light source assembly according to claim 4, characterized in that, The fluorescent light source includes a second LED light source and a phosphor layer. The phosphor layer is disposed on the light-emitting side of the second LED light source. The light emitted from the second LED light source excites the fluorescence to obtain the third light.

7. The light source assembly according to claim 4, characterized in that, The first ray is red, the second ray is blue, and the third ray is green.

8. A projection device, characterized in that, Includes the light source assembly as described in any one of claims 1 to 7.

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