Optical-mechanical assembly and projection device

Abstract

The application provides an optical engine assembly and a projection device, and relates to the technical field of projection devices.The optical engine assembly is beneficial to improving the utilization rate of polarized light, thereby improving the contrast, brightness and the like of a projection image formed by the optical engine assembly.The optical engine assembly comprises an optical source assembly, a polarization member and a light modulator;the optical source assembly can generate light;the polarization member is arranged on a transmission path of the light and is used for converting the light into linearly polarized light;the light modulator is arranged on a side of the polarization member away from the optical source assembly and is used for modulating the light passing through the polarization member to form a projection image.

Description

Technical Field

[0001] This application relates to the field of projection equipment technology, and in particular to an optical engine component and a projection device. Background Technology

[0002] In the optical architecture of a Liquid Crystal Display (LCD) projector, natural light emitted from a light source is first converted into linearly polarized light by a polarization conversion system. This light then illuminates the corresponding LCD panel to form a projected image. The light carrying the projected image is then processed by the lens assembly to finally form the projected image onto the screen. However, this process involves significant light energy loss, which limits the contrast and brightness of the projected image. Utility Model Content

[0003] This application provides an optical engine component and a projection device, which is beneficial to improving the utilization rate of polarized light, thereby improving the contrast, brightness, and other properties of the projected image formed by the optical engine component.

[0004] On one hand, this application provides an optomechanical assembly, which includes: a light source assembly, a polarizer, and a light modulator; wherein, the light source assembly is capable of generating light, and the light-emitting surface of the light source assembly has a reflective layer, which is capable of forming diffuse reflection; the polarizer is disposed on the transmission path of the light transmitted through the reflective layer, and is used to convert the light into linearly polarized light; the light modulator is disposed on the side of the polarizer away from the light source assembly, and is used to modulate the light passing through the polarizer to form a projected image.

[0005] The optomechanical assembly provided in this application includes a polarizer in the transmission path of the light generated by the light source assembly. This polarizer allows a portion of the light generated by the light source assembly to pass through, thus converting at least a portion of the light into polarized light. This polarization can then be converted into a projected image using an optical modulator. Furthermore, a reflective layer is provided on the light-emitting surface of the light source assembly. Light that has not passed through the polarizer is reflected by the polarizer or other devices and reaches the reflective layer, resulting in diffuse reflection. This alters the polarization state of the light that has not passed through the polarizer, allowing some of it to pass through. This increases the amount of light passing through the polarizer, improving the utilization rate of polarized light and thus enhancing the contrast and brightness of the resulting projected image.

[0006] In one possible implementation of this application, the polarizing element includes a reflective polarizer, which is capable of reflecting a first polarized state of light and allowing a second polarized state of light to pass through.

[0007] In one possible implementation of this application, the light source assembly has a fluorescent layer, and the first polarized light reflected by the reflective polarizer can excite the fluorescent layer.

[0008] In one possible implementation of this application, the light source assembly includes a substrate and a light-emitting element, the light-emitting element being disposed on the substrate and used to generate light.

[0009] In one possible implementation of this application, the substrate includes a graphene substrate.

[0010] In one possible implementation of this application, the side of the substrate on which the light-emitting element is disposed has a reflective layer.

[0011] In one possible implementation of this application, the reflective layer includes diffuse reflective particles, which are fixed to the surface of the substrate on which the light-emitting element is disposed by an encapsulation.

[0012] In one possible implementation of this application, the light source assembly includes at least two light-emitting elements, and the at least two light-emitting elements have different color temperatures.

[0013] In one possible implementation of this application, the light source assembly includes a first light-emitting element and a second light-emitting element, the color temperature of the first light-emitting element is different from that of the second light-emitting element, the first light-emitting element and the second light-emitting element are arranged in an array on the substrate, and the first light-emitting element and the second light-emitting element are arranged alternately.

[0014] In one possible implementation of this application, the optomechanical assembly further includes a spectral detector electrically connected to the controller of the light-emitting element, and the spectral detector is used to detect the actual color coordinate data of the light generated by the light source assembly.

[0015] In one possible implementation of this application, the optomechanical assembly further includes a light sensor electrically connected to the controller of the light-emitting element, and the light sensor is used to detect the ambient illuminance of the environment surrounding the optomechanical assembly.

[0016] On the other hand, this application provides a projection device, which includes: a lens assembly and an optical engine assembly provided by any of the above; wherein the lens assembly is disposed on the transmission path of light adjusted by a light modulator so as to form a projected image.

[0017] The projection device provided in this application includes any of the optical engine components provided above, which is beneficial to improving the utilization rate of polarized light, thereby improving the contrast and brightness of the formed projection image, and further improving the contrast and brightness of the formed projection screen. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the optomechanical component provided in this application;

[0019] Figure 2 This is a side view of the light source assembly in the optomechanical assembly provided in this application.

[0020] Figure 3 This is a top view of the light source component in the optomechanical assembly provided in this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Light source assembly; 11-Substrate; 12-Light emitting element; 121-First light emitting element; 122-Second light emitting element; 13-Reflective layer; 14-Reflective layer; 15-Encapsulation component; 2-Polarizing element; 3-Light modulator; 4-Light chamber; 51-Light ray; 52-Reflected light; 53-Linearly polarized light. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0024] In the embodiments 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0025] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0026] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0027] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0028] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] Liquid Crystal Display (LCD) projectors hold a significant position in the consumer projection market due to their simple optical path structure and low cost. With the increasing prevalence of 4K resolution, high brightness, and gimbal functionality, the quality of LCD projectors continues to improve. However, the core optical system of LCD projectors still relies on polarized light modulation, that is, the selective transmission of polarized light through the liquid crystal panel (LCD panel) to ultimately form a projected image.

[0030] In the optical architecture of an LCD projector, natural light emitted from a light source is first converted into linearly polarized light by a polarization conversion system. This linearly polarized light then illuminates the corresponding liquid crystal panel, forming a projected image. The light from the projected image is then adjusted by a lens assembly and finally projected onto the screen to form the projected image. However, this process involves significant light energy loss, due to: 1. Low polarization utilization: Some polarizers can only effectively utilize about 50% of the incident light, leading to a decrease in overall light efficiency. 2. Limited transmittance of the liquid crystal panel: Pixel gaps in the liquid crystal panel (obstruction by thin-film transistor (TFT) circuitry) and absorption losses from polarizers result in transmittance typically being less than 10%. 3. Inconsistency between color gamut and brightness: The insufficient purity of the red spectrum in the phosphors used in related technologies leads to a generally low NTSC (National Television Standards Committee) color gamut, making it difficult to meet the demands of high-end displays.

[0031] This application provides an optomechanical component, referring to... Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the optomechanical component provided in this application. Figure 2 This is a side view of the light source component in the optomechanical assembly provided in this application. This optomechanical assembly can improve the utilization efficiency of the light generated by the light source component. The optomechanical assembly provided in the embodiments of this application will be described below with reference to the examples in the accompanying drawings.

[0032] The optomechanical assembly provided in this application includes: a light source assembly 1, a polarizer 2, and a light modulator 3; wherein, the light source assembly 1 is capable of generating light 51, and the light-emitting surface of the light source assembly 1 has a reflective layer 13, which is capable of diffuse reflection; the polarizer 2 is disposed on the transmission path of the light 51 transmitted through the reflective layer 13, and is used to convert the light 51 into linearly polarized light 53; the light modulator 3 is disposed on the side of the polarizer 2 away from the light source assembly 1, and is used to modulate the light passing through the polarizer 2 to form a projected image.

[0033] In this embodiment, the light source assembly 1 can generate natural light or light 51 that is close to natural light. For example, the light source assembly 1 can adopt a component including a surface light source, which can generate soft and natural light 51.

[0034] For example, a reflective layer 13 can be provided on the light source assembly 1. For instance, a reflective layer 13 can be provided on the surface of the light source assembly 1, such as on the surface from which the light 51 of the light source assembly 1 is emitted. The reflective layer 13 can transmit the light 51 generated by the light source assembly 1.

[0035] In another example, the reflective layer 13 can be configured as a surface with a relatively high surface roughness. For instance, the light-emitting surface of the light source assembly 1 can be machined with multiple tiny pits and protrusions to enable the light-emitting surface to diffusely reflect light.

[0036] In this embodiment, the light 51 generated by the light source assembly 1 can be converted into linearly polarized light 53 by the polarizer 2. For example, the polarizer 2 can be an iodine-based polarizer, a metal wire grid, etc. The polarizer 2 can be placed in the transmission path of the light 51 generated by the light source assembly 1. In this way, after the light 51 is transmitted to the polarizer 2, part of the light 51 is reflected by the polarizer 2, while the other part of the light 51 can pass through the polarizer 2, thereby obtaining linearly polarized light 53.

[0037] For example, a light chamber 4 can be provided between the light source assembly 1 and the polarizer 2. For instance, the light chamber 4 can be configured as a cylindrical shape approximating a frustum, with both ends of the light chamber 4 matched to the shapes of the light source assembly 1 and the polarizer 2, respectively. One end of the light chamber 4 can then be connected to the light source assembly 1, and the other end to the polarizer 2. The light chamber 4 can be made of an opaque or low-transmittance material to concentrate the light and improve light uniformity.

[0038] In this embodiment, the transmission of linearly polarized light 53 formed by a polarizer can be controlled by the light modulator 3 to form a projected image. For example, the light modulator 3 can be a device including a liquid crystal panel, which can control the intensity of the transmitted polarized light by precisely adjusting the orientation angle of the liquid crystal molecule layer, so that the brightness and color of each pixel can be adjusted independently, thereby forming a projected image.

[0039] The optomechanical assembly provided in this application embodiment has a polarizer 2 disposed on the transmission path of the light 51 generated by the light source assembly 1. The polarizer 2 allows a portion of the light 51 generated by the light source assembly 1 to pass through it, thereby converting at least a portion of the light 51 generated by the light source assembly 1 into polarized light. This allows the electronic signal to be converted into a projected image by an optical modulator. Furthermore, a reflective layer 13 is disposed on the light-emitting surface of the light source assembly 1. Light that has not passed through the polarizer 2 is reflected by the polarizer 2 or other devices and reaches the reflective layer 13, forming diffuse reflection. This changes the polarization state of the light 51 that has not passed through the polarizer 2, allowing some of the light 51 that has not passed through the polarizer 2 to pass through it. This increases the amount of light passing through the polarizer 2, improving the utilization rate of polarized light and thus enhancing the contrast and brightness of the formed projected image.

[0040] In some possible embodiments of this application, the polarizer 2 includes a reflective polarizer that can reflect the first polarized light in the light 51 and allow the second polarized light in the light 51 to pass through.

[0041] In this embodiment, the polarizer 2 can be a reflective polarizer, such as a wire grid polarizer, a Brewster angle reflective polarizer, or a cholesteric liquid crystal reflective polarizer. Thus, after the light 51 generated by the light source assembly 1 is transmitted to the reflective polarizer, the parallel light (P-state light) with its polarization direction parallel to the incident plane can directly pass through the reflective polarizer to form linearly polarized light 53. The parallel light is the second polarization state portion of the light 51 generated by the light source assembly 1. Meanwhile, the vertical light (S-state light) with its polarization direction perpendicular to the incident plane is reflected by the reflective polarizer to form reflected light 52, which is not utilized. The vertical light is the first polarization state portion of the light 51 generated by the light source assembly 1. After the reflected light 52 is transmitted to the reflective layer 13, the reflected light 52 in various directions is transmitted again to the reflective polarizer. Thus, after multiple reflections, a portion of the vertical light can be gradually converted into parallel light and transmitted through the reflective polarizer until it reaches the light modulator 3.

[0042] In the above embodiments, since the polarizer 2 includes a reflective polarizer, the first polarized light can be reflected to the reflective layer 13 through the reflective polarizer. This allows a portion of the first polarized light to be converted into second polarized light after multiple reflections between the reflective polarizer and the reflective layer 13, thereby increasing the amount of second polarized light in the light 51 generated by the light source assembly 1, and thus improving the light efficiency of the optomechanical assembly.

[0043] In some possible embodiments of this application, the light source assembly 1 has a fluorescent layer (not shown in the figure), and the first polarized light reflected by the reflective polarizer can excite the fluorescent layer.

[0044] In this embodiment, a phosphor layer can be disposed on the light source component 1, and the phosphor layer can be configured to be excited by light of a first polarization state. For example, the phosphor layer can be made of red phosphor (such as K2SiF6:Mn). 4+ A combination of red and green phosphors (such as β-SiAlON) is used. The red and green phosphors can be sprayed onto the light-emitting surface of the light source assembly 1 using a partitioned spraying process (e.g., mask accuracy of ±50μm). In this way, after the first polarized light reflected by the reflective polarizer is transmitted to the phosphor layer, the phosphor layer can be re-excited. Simultaneously, the excitation light (usually blue light) from the light-emitting element 12 may be reflected back to the light source assembly 1 by the light source 4, etc. This reflected excitation light (usually blue light) can also re-excite the phosphor layer, thereby generating new excited light through the phosphor layer. For example, high-purity emission of red and green light (red wavelength 630nm, green wavelength 530nm) can be achieved through the phosphor layer.

[0045] In the above embodiments, since a fluorescent layer is provided on the light source component 1, the fluorescent layer can be re-excited to generate excited light, which is beneficial to improving the brightness of the formed projected image.

[0046] In some possible embodiments of this application, reference is made to Figure 3 , Figure 3 This is a top view of the structure of the light source assembly 1 in the optomechanical assembly provided in this application, as shown in the figure. Figure 2 and Figure 3 As shown, the light source assembly 1 includes a substrate 11 and a light-emitting element 12. The light-emitting element 12 is disposed on the substrate 11 and is used to generate light 51.

[0047] In this embodiment, the light source assembly 1 can be configured to include a substrate 11 and a light-emitting element 12, and the light-emitting element 12 can be fixedly supported on the substrate 11. For example, the substrate 11 can be an aluminum substrate, and the light-emitting element 12 can be a light-emitting diode (LED). Multiple LEDs can be fixed on the aluminum substrate, and an insulating layer (such as epoxy resin) can be provided between the LEDs and the aluminum substrate. Light 51 can then be generated by the LEDs.

[0048] For example, the substrate 11 can also be a graphene substrate, and the shape of the graphene substrate can be set according to the arrangement of the LEDs. For example, the graphene substrate can be set as a flat plate with a rectangular, square, or circular shape, and the LEDs can be fixed on the graphene substrate by welding, bonding, or other methods. Compared with aluminum substrates, which require the introduction of an epoxy resin insulating layer (thermal conductivity of only 0.3-1.5 W / mK), the overall thermal resistance of the aluminum substrate and epoxy resin reaches 1.0 to 1.5 °C / W, and the insulating material will age and become brittle during long-term thermal cycling. With the extension of service time, the overall thermal resistance of the aluminum substrate and epoxy resin will increase by 20%-30%. The substrate 11 uses a graphene substrate, whose thermal conductivity is more than 8 times that of the aluminum substrate, thus enabling faster heat dissipation. Therefore, by using a graphene substrate, the junction temperature will be reduced by 15 °C to 20 °C, and the electro-optical conversion efficiency (WPE) of the optomechanical component can be increased by 10% to 15% compared to the aluminum substrate.

[0049] In the above embodiments, since the light source assembly 1 is configured to include a substrate 11 and a light-emitting element 12, the substrate 11 provides a mounting and support foundation for the light-emitting element 12, and can absorb the heat generated by the light-emitting element during operation, thereby improving the heat dissipation efficiency of the light-emitting element 12. Simultaneously, configuring the substrate 11 to include a graphene substrate allows for improved heat dissipation efficiency of the light-emitting element 12 due to the excellent thermal conductivity of graphene, which helps maintain the light-emitting element 12 at a lower operating temperature, thereby improving the electro-optical conversion efficiency of the optomechanical assembly.

[0050] In some possible embodiments of this application, such as Figure 2 As shown, the side of the substrate 11 on which the light-emitting element 12 is disposed has a reflective layer 14.

[0051] In this embodiment, a reflective layer 14 can be provided in the light source assembly 1 to increase the utilization efficiency of the light 51 generated by the light source assembly 1. For example, the reflective layer 14 can be provided on the surface of the light-emitting element 12 on the substrate 11. The reflective layer 14 can be a silver-plated layer, an aluminum-plated layer, etc., and the silver-plated layer, aluminum-plated layer, etc., can be made into a relatively smooth plane, so that specular reflection can be formed through the reflective layer 14. The reflective layer 14 can also adopt a structure that can form diffuse reflection, such as a frosted surface.

[0052] In the above embodiment, since a reflective layer 14 is provided on the substrate 11, the light 51 generated by the light-emitting element 12 can be reflected to the side away from the substrate 11 through the reflective layer 14, which helps to reduce the heat absorbed by the substrate 11 and allows the light 51 generated by the light-emitting element 12 to be transmitted to the polarizer 2 as completely as possible, thereby helping to reduce the temperature of the light source assembly 1 and improve the utilization efficiency of the light 51.

[0053] In some possible embodiments of this application, such as Figure 2 As shown, the reflective layer 13 includes diffuse reflective particles, which are fixed to the surface of the substrate 11 where the light-emitting element 12 is disposed by the encapsulation component 15.

[0054] In this embodiment, the reflective layer 13 can be configured to include a plurality of diffuse reflective particles. For example, the diffuse reflective particles can be TiO2 or SiO2 particles, and the fine diffuse reflective particles can be fixed around the light-emitting element 12 by the encapsulation component 15, that is, the diffuse reflective layer can be fixed on the substrate 11 and the surface of the light-emitting element 12. For example, the encapsulation component 15 can be a transparent resin encapsulant, etc., and the diffuse reflective particles can be uniformly mixed in the resin material, and then the resin mixed with the diffuse reflective particles is coated on the surface of the substrate 11 and the light-emitting element 12. After the resin cures, the reflective layer 13 is formed.

[0055] In the above embodiments, since at least two diffuse reflection particles are fixed to the surface of the light-emitting element 12 on the substrate 11 by the encapsulation component 15, a reflective layer 13 can be formed by multiple diffuse reflection particles, thereby converting the first polarized light into the second polarized light through the diffuse reflection particles, which is beneficial to increasing the amount of light transmitted through the polarizing element 2.

[0056] In some possible embodiments of this application, such as Figure 3 As shown, the light source assembly 1 includes at least two light-emitting elements 12, and the color temperatures of the at least two light-emitting elements 12 are different.

[0057] In this embodiment, multiple light-emitting elements 12 can be provided in the light source assembly 1, and the multiple light-emitting elements 12 can be devices with different color temperatures. For example, some of the multiple light-emitting elements 12 can be LEDs with a color temperature of 6500K to 7000K, another part of the multiple light-emitting elements 12 can be LEDs with a color temperature of 7000K to 9500K, or LEDs with a color temperature lower than 6500K or higher than 9500K. This embodiment does not limit the specific color temperature value of the light-emitting elements 12.

[0058] In the above embodiments, since the light source component 1 includes at least two light-emitting elements 12 with different color temperatures, the light-emitting elements 12 with different color temperatures can produce light 51 with different color temperatures, thereby making the optical engine component suitable for different application scenarios such as cinemas and reading, which is beneficial to improving the applicability of the optical engine component.

[0059] In some possible embodiments of this application, such as Figure 3 As shown, the light source assembly 1 includes a first light-emitting element 121 and a second light-emitting element 122. The color temperature of the first light-emitting element 121 is different from that of the second light-emitting element 122. The first light-emitting element 121 and the second light-emitting element 122 are arranged in an array on the substrate 11, and the first light-emitting element 121 and the second light-emitting element 122 are arranged alternately.

[0060] In this embodiment, two light-emitting elements 12 with different color temperatures can be provided in the light source assembly 1, that is, multiple first light-emitting elements 121 and multiple second light-emitting elements 122 are provided on the substrate 11, and the color temperature ranges of the first light-emitting elements 121 and the second light-emitting elements 122 do not overlap.

[0061] For example, the first light-emitting element 121 and the second light-emitting element 122 can be arranged and fixed on the base 11 in an array. For instance, the first light-emitting element 121 and the second light-emitting element 122 can be arranged on the base 11 in a rectangular array, a square array, a circular array, etc. For example, the first light-emitting element 121 and the second light-emitting element 122 can be arranged in a 30x40 rectangular array on the base 11, that is, the first light-emitting element 121 and the second light-emitting element 122 can be arranged in 30 rows and 40 columns on the base 11, where the rows and columns are perpendicular or nearly perpendicular. This application embodiment does not limit the specific shape of the array formed by the arrangement of the first light-emitting element 121 and the second light-emitting element 122.

[0062] In another example, the first light-emitting element 121 and the second light-emitting element 122 can be arranged alternately on the substrate 11. For example, each first light-emitting element 121 may be adjacent to a second light-emitting element 122, and each second light-emitting element 122 may be adjacent to a first light-emitting element 121. Alternatively, two first light-emitting elements 121 may be grouped together, and two second light-emitting elements 122 may be grouped together, with each group of first light-emitting elements 121 adjacent to a second light-emitting element 122, and each group of second light-emitting elements 122 adjacent to a first light-emitting element 121. The specific alternating arrangement of the first light-emitting element 121 and the second light-emitting element 122 is not limited in the embodiments of this application.

[0063] In the above embodiments, since the light source assembly 1 includes a first light-emitting element 121 and a second light-emitting element 122 with different color temperatures, and the first light-emitting element 121 and the second light-emitting element 122 are arranged alternately, a mixed light-emitting surface can be formed by the first light-emitting element 121 and the second light-emitting element 122. Thus, by adjusting the voltage or current applied to the first light-emitting element 121 and the second light-emitting element 122 respectively, the color temperature of the first light-emitting element 121 and the second light-emitting element 122 can be changed within different ranges, which facilitates the adjustment of the color temperature of the optomechanical assembly. In this way, the same optomechanical assembly can be used for various application scenarios with different color temperature requirements.

[0064] In some possible embodiments of this application, the optomechanical assembly further includes a spectral detector (not shown in the figure), which is electrically connected to the controller of the light-emitting element 12. The spectral detector is used to detect the actual color coordinate data of the light 51 generated by the light source assembly 1.

[0065] In this embodiment, a spectral detector can be installed in the optomechanical assembly. For example, the spectral detector can be placed at the edge of the light source assembly 1, and the actual chromaticity coordinate data of the light ray 51 emitted from the light-emitting surface of the light source assembly 1 can be detected by the spectral detector. Chromaticity coordinates are the coordinates of a color, also called the colorimetric system.

[0066] For example, the spectral detection device can be a grating-type spectral sensor, a filter-type spectral sensor, an interferometric spectral sensor, or an integrated optical spectral sensor. The spectral detection device can be electrically connected to the controller of the light-emitting element 12. Thus, after the system using the optomechanical components provided in this embodiment is started, it can first retrieve the initial driving values ​​of two sets of LEDs with different color temperatures by calling a preset color temperature-current look-up table (LUT) according to the user-selected scene mode (such as cinema or reading). When the target color temperature is not within the preset range, the controller can calculate the mixing weight coefficient in real time according to the algorithm and output the initial current applied to each light-emitting element 12 through the driver. Meanwhile, the spectral sensor electrically connected to the controller can collect the actual color coordinate data of the light-emitting element 12 at a certain frequency. After converting the actual color coordinate data into a real-time color temperature value through a formula, the real-time color temperature value can be compared with the target value and input into the controller for closed-loop correction. This allows for dynamic adjustment of the pulse width modulation (PWM) duty cycle of the two sets of LEDs (multiple first light-emitting elements 121 and multiple second light-emitting elements 122), thereby adjusting the color temperature of the two sets of LEDs and matching the overall color temperature of the optomechanical component with the color temperature required for the application scenario.

[0067] In the above embodiments, since a spectral detector is provided in the optomechanical component and the spectral detector is electrically connected to the controller of the light-emitting component 12, the current applied to the light-emitting component 12 can be adjusted in a timely manner according to the actual color coordinate data of the light-emitting component 12 obtained by the spectral detector. This allows the overall color temperature of the light 51 generated by the light source component 1 to match the application scenario of the optomechanical component, which is beneficial to improving the user experience of the optomechanical component system provided in this application embodiment.

[0068] In some possible embodiments of this application, the optomechanical assembly further includes a light sensor (not shown in the figure), which is electrically connected to the controller of the light-emitting element 12. The light sensor is used to detect the ambient illuminance of the environment surrounding the optomechanical assembly.

[0069] In this embodiment, a light sensor can be set in the optomechanical component, or the light sensor can be set outside the housing of the optomechanical component, or the light sensor can be set on the housing of the device using the optomechanical component provided in this embodiment, so as to detect the ambient illuminance of the environment around the optomechanical component through the light sensor.

[0070] For example, the light sensor can be a photoresistor, photodiode, etc. The light sensor can be electrically connected to the controller of the light-emitting element 12. Thus, after the system using the optomechanical component provided in this embodiment is started, the light sensor can acquire the ambient illuminance in real time at a certain sampling frequency, and transmit the acquired ambient illuminance data to the controller. The controller can generate a PWM dimming signal according to a preset light intensity-current mapping curve, and thereby apply a current corresponding to the PWM dimming signal to each light-emitting element 12 through a driver, etc. For example, when the ambient illuminance is lower than a preset threshold, the system using the optomechanical component provided in this embodiment can automatically enter a low-power mode to reduce system power consumption and extend the lifespan of the optomechanical component components. In a typical home theater scenario, this can save nearly 50% of energy compared to using light 51 with a fixed brightness from the light source component 1.

[0071] In the above embodiments, since the optomechanical component includes a light sensor and the light sensor is electrically connected to the controller of the light-emitting element 12, the ambient illuminance of the environment around the optomechanical component can be obtained through the light sensor. Thus, the illuminance of the light 51 generated by the light source component 1 can be adjusted in real time according to the ambient illuminance. This allows the illuminance of the light 51 generated by the optomechanical component to match the illuminance of the surrounding environment, thereby reducing the power consumption of the optomechanical component in dark field application scenarios and improving the energy-saving performance of the optomechanical component.

[0072] In addition, this application embodiment also provides a projection device, which includes: a lens assembly and an optical engine assembly provided in any of the above embodiments; wherein, the lens assembly is disposed on the transmission path of the light adjusted by the light modulator 3 so that the projected image forms a projected screen.

[0073] In this embodiment, the lens assembly can adjust the linearly polarized light 53 processed by the light modulator 3 to form a projection image of a suitable size. For example, the lens assembly may include a reflector, multiple lenses, such as convex lenses, concave lenses, plane mirrors, etc. This embodiment does not limit the specific structure of the lens assembly.

[0074] For example, a housing can be provided for the lens assembly and the optical engine assembly, and the lens assembly and the optical engine assembly can be assembled into a projection device through the housing, and the lens assembly is positioned on the transmission path of the linearly polarized light 53 processed by the light modulator 3.

[0075] The projection device provided in this application includes the optical engine component provided in any of the above embodiments, which is beneficial to improving the utilization rate of polarized light, thereby improving the contrast and brightness of the formed projection image, and further improving the contrast and brightness of the formed projection screen.

[0076] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. An optomechanical component, characterized in that, include: A light source assembly (1) is capable of generating light (51), and the light-emitting surface of the light source assembly (1) has a reflective layer (13) capable of forming diffuse reflection; Polarizing element (2), which is disposed on the transmission path of the light (51) transmitted through the reflective layer (13) to convert the light (51) into linearly polarized light; A light modulator (3) is disposed on the side of the polarizer (2) away from the light source assembly (1) and is used to modulate the light passing through the polarizer (2) to form a projected image.

2. The optomechanical assembly according to claim 1, characterized in that, The polarizing element (2) includes a reflective polarizer, which is capable of reflecting the first polarized light in the light ray (51) and allowing the second polarized light in the light ray (51) to pass through.

3. The optomechanical assembly according to claim 2, characterized in that, The light source assembly (1) has a fluorescent layer, and the first polarized light reflected by the reflective polarizer can excite the fluorescent layer.

4. The optomechanical assembly according to any one of claims 1 to 3, characterized in that, The light source assembly (1) includes a substrate (11) and a light-emitting element (12), wherein the light-emitting element (12) is disposed on the substrate (11) and is used to generate light (51).

5. The optomechanical assembly according to claim 4, characterized in that, The substrate (11) includes a graphene substrate.

6. The optomechanical assembly according to claim 4, characterized in that, The light-emitting element (12) is disposed on one side of the substrate (11) and has a reflective layer (14).

7. The optomechanical assembly according to claim 4, characterized in that, The reflective layer (13) includes diffuse reflective particles, which are fixed to the surface of the substrate (11) where the light-emitting element (12) is disposed by an encapsulation component (15).

8. The optomechanical assembly according to claim 4, characterized in that, The light source assembly (1) includes at least two light-emitting elements (12), and the at least two light-emitting elements (12) have different color temperatures.

9. The optomechanical assembly according to claim 4, characterized in that, The light source assembly (1) includes a first light-emitting element (121) and a second light-emitting element (122). The color temperature of the first light-emitting element (121) is different from that of the second light-emitting element (122). The first light-emitting element (121) and the second light-emitting element (122) are arranged in an array on the substrate (11), and the first light-emitting element (121) and the second light-emitting element (122) are arranged alternately.

10. The optomechanical assembly according to claim 8 or 9, characterized in that, The optomechanical assembly also includes a spectral detection device, which is electrically connected to the controller of the light-emitting element (12). The spectral detection device is used to detect the actual color coordinate data of the light (51) generated by the light source assembly (1).

11. The optomechanical assembly according to claim 8 or 9, characterized in that, The optomechanical assembly also includes a light sensor, which is electrically connected to the controller of the light-emitting element (12) and is used to detect the ambient illuminance of the environment surrounding the optomechanical assembly.

12. A projection device, characterized in that, include: The optomechanical assembly according to any one of claims 1 to 11; A lens assembly is positioned on the transmission path of light adjusted by the light modulator (3) to form a projected image.

Images