WO2023159818A1 - 一种光机板以及投影光机 - Google Patents

一种光机板以及投影光机 Download PDF

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Publication number
WO2023159818A1
WO2023159818A1 PCT/CN2022/100342 CN2022100342W WO2023159818A1 WO 2023159818 A1 WO2023159818 A1 WO 2023159818A1 CN 2022100342 W CN2022100342 W CN 2022100342W WO 2023159818 A1 WO2023159818 A1 WO 2023159818A1
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WO
WIPO (PCT)
Prior art keywords
baffle
optical
metal plate
sheet
heat
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Application number
PCT/CN2022/100342
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English (en)
French (fr)
Inventor
姚春丽
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歌尔光学科技有限公司
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Application filed by 歌尔光学科技有限公司 filed Critical 歌尔光学科技有限公司
Publication of WO2023159818A1 publication Critical patent/WO2023159818A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Definitions

  • the present application relates to the technical field of optical equipment, and more specifically, the present application relates to an optical machine board and a projection optical machine.
  • the digital light processing (Digital Light Processing, DLP) projection light machine display mode has the characteristics of high brightness, high contrast, and high resolution. Combined with the new LED light source, it can realize miniaturized portable micro-projection, and is favored by more and more users. welcome.
  • the beam adjustment module inside the projection light engine includes various lens combinations.
  • Lenses are generally divided into two types: glass and plastic.
  • the lenses of both materials have their own advantages and disadvantages.
  • the weight of plastic lenses is relatively small, but the thermal conductivity of plastic materials is poor, and plastic lenses are prone to deformation after being heated. If the heat emitted during the working process cannot be discharged in time, it will cause deformation of the plastic lens, which will affect the imaging effect of the projection optical machine equipment.
  • An object of the present application is to provide a new technical solution for an optical machine board and a projection optical machine.
  • an optomechanical board is provided.
  • the optical mechanical board is applied to a projection optical machine, and the optical mechanical board includes:
  • a metal plate having a first surface and a second surface disposed opposite to each other;
  • the baffle part is arranged on the first surface, and the baffle part is arranged on the optical path when the projector is in a dark state;
  • a heat conduction sheet, the heat conduction sheet is arranged on the first surface and/or the second surface.
  • a notch is provided on the metal plate, and the notch runs through the first surface and the second surface; the heat conducting sheet covers the Notch.
  • the heat conducting sheet is a composite graphite sheet.
  • the heat conducting sheet is bonded to the first surface and/or the second surface of the metal plate.
  • the heat conduction sheet includes at least two graphite sheets stacked in sequence, and an adhesive layer is arranged between adjacent graphite sheets;
  • One side of the graphite sheet away from the adhesive layer is provided with a first protective film layer
  • connection layer is provided on the side of the other graphite sheet facing away from the adhesive layer, and the heat conduction sheet is bonded to the first surface and/or the second surface of the metal plate through the connection layer.
  • the heat conducting sheet in a direction perpendicular to the thickness of the heat conducting sheet, has a first end surface and a second end surface disposed opposite to each other;
  • a second protective film layer is provided on the first end surface, and/or a third protective film layer is provided on the second end surface.
  • the baffle part is integrally formed with the metal plate.
  • the baffle part includes a first baffle and a second baffle, the first baffle is connected to the edge of the metal plate, the second baffle is located on the metal plate, and the The second baffle is connected to the edge of the notch, and the shape of the second baffle matches the shape of the notch.
  • a light projection machine includes the light machine plate described in the first aspect.
  • a DMD module is arranged on the light projection machine, and the baffle part is located on the light path when the DMD module is in a dark state.
  • a prism assembly and a plastic lens are arranged in the projection light engine, and the plastic lens is arranged at a position adjacent to the prism assembly;
  • the baffle part includes a first baffle and a second baffle, the first baffle is located on one side of the prism assembly, the second baffle is located on the other side of the prism assembly, and The second baffle is located between the prism assembly and the plastic lens.
  • a heat sink is provided on the light projection machine, and the heat conducting sheet extends to the surface of the heat sink and is arranged in close contact with the surface of the heat sink.
  • an optomechanical board is provided.
  • a heat conduction sheet is provided on the first surface and/or the second surface of the optomechanical board. The heat conduction sheet reduces the internal temperature of the optomechanical board and the temperature of the baffle.
  • FIG. 1 is a schematic structural diagram of an optical-mechanical board in an embodiment of the present application from a viewing angle.
  • FIG. 2 is a structural schematic view of another viewing angle of the optomechanical board in the embodiment of the present application.
  • FIG. 3 is a structural schematic view of another viewing angle of the optomechanical board in the embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a heat conducting sheet in an embodiment of the present application.
  • Thermal conductive sheet 31. First graphite sheet; 32. Second graphite sheet; 33. Third graphite sheet; 34. First adhesive layer; 35. Second adhesive layer; 36. First protective film layer; 37, connecting layer; 38, first release film; 39, second release film.
  • the present application provides an optical machine board, which is applied to a projection light machine, and the light machine board plays a role of heat conduction, and can reduce the internal temperature of the projection light machine.
  • the optomechanical plate may be an optomechanical cover plate covering the bottom case of the projector; or the optomechanical plate may be a metal plate on the bottom case of the optical machine. Therefore, the optomechanical plate can be the top plate or the bottom plate in the projection optical machine structure.
  • the optomechanical board includes: a metal plate 1 , a baffle part 2 and a heat conducting sheet 3 .
  • the metal plate 1 has a first surface 11 and a second surface 12 arranged opposite to each other.
  • the first surface 11 of the metal plate 1 is set toward the inside of the light projector, and the second surface 12 of the metal plate 1 faces away from the light projector. internal settings.
  • the baffle part 2 is arranged on the first surface 11 of the metal plate 1, the heat conduction sheet 3 is arranged on the first surface 11 and/or the second surface 12 of the metal plate 1, and the heat conduction sheet 3 is combined with the metal plate 1, so that the baffle part 2 can The temperature and the temperature of the lens around the baffle portion 2 are subjected to cooling treatment.
  • a baffle part 2 is arranged on the first surface 11 of the metal plate 1, and the baffle part 2 is arranged on the light path when the projector is in a dark state. Specifically, when the projection light machine projects a dark picture, most of the light will be projected on the baffle part 2, and the temperature on the baffle part 2 will increase; when the temperature on the baffle part 2 rises, the baffle The temperature of part 2 will radiate to the nearby lens, causing the temperature of the lens to rise. Therefore, when the projection light machine is in a dark state, the temperature of the baffle part 2 and the lenses around the baffle part 2 will increase inside the projection light machine, and most of the heat is concentrated around the baffle part 2 .
  • the temperature of the baffle part 2 and the surrounding lenses of the baffle part 2 conducts heat through the metal plate, but the thermal conductivity of the metal plate is limited, and the temperature of the baffle part 2 and the surrounding lenses of the baffle part 2 cannot be well reduced. temperature.
  • the temperature of the plastic lens cannot be lowered quickly, and the plastic lens will be cracked, deformed or even melted, which greatly affects the imaging analysis and performance of the projection optical machine. service life.
  • the present application arranges a heat conduction sheet 3 on the first surface 11 and/or the second surface 12 of the metal plate 1.
  • the heat conduction sheet 3 has a heat conduction effect, and the heat conduction sheet 3 can quickly improve the problem of heat concentration inside the projection light machine.
  • the baffle part 2 and the surrounding lenses are subjected to cooling treatment.
  • a heat conducting sheet 3 is disposed on the first surface 11 of the metal plate 1 . Since the baffle part 2 is provided on the first surface 11 , when the heat conduction sheet 3 is provided on the first surface 11 of the metal plate 1 , the heat conduction sheet 3 needs to be arranged avoiding the baffle part 2 .
  • a heat conducting sheet 3 is provided on the second surface 12 of the metal plate 1 .
  • the heat conducting sheet 3 covers the second surface 12 .
  • a heat conducting sheet 3 is provided on both the first surface 11 and the second surface 12 of the metal plate 1 .
  • the temperature of the first surface 11 of the metal plate 1 will be higher than that of the metal plate.
  • the temperature of the second surface 12 of 1, for example, the first surface 11 of the metal plate 1 will be directly irradiated by the internal light of the projector, and the temperature of the first surface 11 is higher than the temperature of the second surface 12.
  • the heat conduction sheet 3 is arranged on on the second surface 12 of the metal plate 1 .
  • the heat conduction sheet 3 has the effect of heat conduction and heat dissipation, and the heat conduction sheet 3 is arranged on the first surface and/or the second surface of the metal plate 1, and the metal plate 1 combines the heat conduction sheet 3, which can reduce the heat dissipation inside the projection light machine.
  • the temperature, especially the temperature of the baffle part 2 and the temperature of the lens around the baffle part 2 is reduced to improve the reliability of the lens and the service life of the projection light machine.
  • the heat conduction sheet 3 is arranged on the first surface 11 and/or the second surface 12 of the metal plate 1, and the baffle part 2 and its
  • the method of realizing heat dissipation for the baffle part 2 and the surrounding lenses in this embodiment is simple and easy to operate.
  • a notch 13 is provided on the metal plate 1 , and the notch 13 runs through the first surface. 11 and the second surface 12 ; the heat conducting sheet 3 covers the notch 13 .
  • a notch 13 is formed on the metal plate 1, and the notch 13 is arranged near the baffle part 2, so that the setting position of the notch 13 basically corresponds to the setting position of the lenses around the baffle part 2, and the notch 13 corresponds to The lens temperature is relatively high.
  • the installation position of the heat conduction sheet 3 corresponds to the position of the baffle part 2.
  • the installation position of the heat conduction sheet 3 corresponds to the position of the notch 13, so that the heat conduction sheet 3 can improve the heat dissipation efficiency of the baffle part 2 and the baffle part. 2 The heat dissipation efficiency of the surrounding lens.
  • the heat conduction sheet 3 is covered on the notch 13, and the heat conduction sheet 3 has a light blocking effect, which prevents some light inside the projector from being transmitted from the notch 13 to the outside, and also prevents external light from passing through the notch. Part 13 enters into the projector light machine.
  • a heat conduction device is provided. slice 3.
  • the heat conducting sheet 3 is disposed on the first surface and/or the second surface 12 .
  • the heat conduction sheet 3 can cover the second surface 12 of the metal plate 1. At this time, part of the heat conduction sheet 3 corresponds to the setting position of the baffle part 2, and part of the heat conduction sheet 3 corresponds to the position of the baffle part 2.
  • the setting positions of the notches 13 correspond to each other.
  • the heat conducting sheet 3 is a composite graphite sheet.
  • the heat conducting sheet 3 disposed on the first surface 11 and/or the second surface 12 of the metal plate 1 is a composite graphite sheet.
  • the use of composite graphite sheets for heat conduction and heat dissipation avoids the situation that single-layer graphite sheets are easily broken due to their high brittleness.
  • the thermal conductivity of the two-dimensional plane of the composite graphite sheet is as high as 1500W/(m.K), and it has heat uniformity characteristics.
  • the composite graphite sheet can quickly improve the problem of heat concentration inside the projection light machine, and cool down the baffle part 2 and its surrounding lenses .
  • the heat conduction sheet 3 is a composite graphite sheet, and the composite graphite sheet includes a black graphite sheet.
  • the black graphite sheet has a light-blocking effect, which prevents some light inside the projection light machine from being transmitted from the notch 13 to the outside. In addition, it also prevents external light from entering into the light projector from the notch 13 .
  • the heat conducting sheet 3 is bonded to the first surface 11 and/or the second surface 12 of the metal plate 1 .
  • the heat conducting sheet 3 is glued on the first surface 11 and/or the second surface 12 of the metal plate 1 .
  • the heat conduction sheet 3 is prepared, and the heat conduction sheet 3 is positioned according to the position where the screw is locked (that is, the metal plate 1 needs to be fixed on the projection light by screws).
  • the position of the screw lock On the bottom shell of the machine, it is necessary to avoid the position of the screw lock when positioning the heat conduction sheet 3), after confirming that the positioning is correct, then attach the heat conduction sheet 3 to the second surface 12 of the metal plate 1, and ensure heat conduction
  • the sheet 3 is attached well to avoid glue opening between the thermal conductive sheet 3 and the metal plate 1 .
  • the heat conduction sheet 3 includes at least two graphite sheets stacked, and an adhesive layer is arranged between adjacent graphite sheets;
  • One side of the graphite sheet away from the adhesive layer is provided with a first protective film layer 36;
  • the other side of the graphite sheet facing away from the adhesive layer is provided with a connecting layer 37, and the heat conducting sheet 3 is connected to the first surface and/or the second surface 12 of the metal plate 1 through the connecting layer 37. bonding.
  • the heat conduction sheet 3 includes three graphite sheets stacked, and the three graphite sheets include a first graphite sheet 31 , a second graphite sheet 32 and a third graphite sheet 33 .
  • the first graphite sheet 31 is arranged adjacent to the second graphite sheet 32
  • the second graphite sheet 32 is arranged adjacent to the third graphite sheet 33 .
  • a first adhesive layer 34 is provided between the first graphite sheet 31 and the second graphite sheet 32 , and the first graphite sheet 31 and the second graphite sheet 32 are bonded by the first adhesive layer 34 .
  • the first adhesive layer 34 is a double-sided tape structure.
  • a second adhesive layer 35 is disposed between the second graphite sheet 32 and the third graphite sheet 33 , and the second graphite sheet 32 and the third graphite sheet 33 are bonded by the second adhesive layer 35 .
  • the second adhesive layer 35 is a double-sided tape structure.
  • the first adhesive layer 34 and the second adhesive layer 35 can be the same type of adhesive layer, or the first adhesive layer 34 and the second adhesive layer 35 are different types of adhesive layer.
  • a first protective film layer 36 is provided on the side of the first graphite sheet 31 away from the first adhesive layer 34, and one side of the first protective film layer 36 is bonded to the first graphite sheet 31,
  • the first protective film layer 36 may be black single-sided adhesive tape.
  • the first protective film layer 36 is set as black single-sided adhesive, on the one hand, it can play a light-shielding effect, and on the other hand, the first graphite sheet 31 is protected by the black single-sided adhesive to avoid debris on the surface of the first graphite sheet 31 and the like.
  • connection layer 37 is provided on the side of the third graphite sheet 33 away from the second adhesive layer 35, one side of the connection layer 37 is connected to the third graphite sheet 33, and the other side of the connection layer 37 is a metal plate
  • the second surface 12 or the first surface 11 of 1 is connected.
  • the connecting layer 37 can be black double-sided adhesive tape.
  • the connecting layer 37 is set as black double-sided adhesive tape, which can play a role of blocking light on the one hand, and on the other hand, the black double-sided adhesive tape plays a role of connection.
  • a first release film 38 is provided on a side of the first protective film layer 36 away from the first graphite sheet 31 .
  • a second release film 39 is provided on a side of the connection layer 37 away from the third graphite sheet 33 .
  • the first release film 38 and the second release film 39 protect the entire heat conducting sheet 3 .
  • the first release film 38 is peeled off from the first protective film layer 36
  • the second release film 39 is peeled off from the connection layer 37 .
  • the thickness of the heat conducting sheet 3 ranges from 2 mm to 4 mm.
  • the thickness of the heat conduction sheet 3 is limited to reduce the weight of the heat conduction sheet 3 .
  • the thickness of the heat conduction sheet 3 is limited within this range, so that the heat conduction sheet 3 meets the lightweight design on the premise of satisfying heat conduction and heat dissipation of the heat conduction sheet 3 .
  • the heat conducting sheet 3 in a direction perpendicular to the thickness of the heat conducting sheet 3, has a first end surface and a second end surface disposed opposite to each other;
  • a second protective film layer is provided on the first end surface, and/or a third protective film layer is provided on the second end surface.
  • a second protective film layer is provided on the first end surface of the heat conduction sheet 3, and the second protective film layer plays a role of wrapping the first end surface to avoid chipping on the first end surface of the heat conduction sheet 3, and at the same time It also prevents the external dust from polluting the heat conduction sheet 3;
  • a third protective film layer is set on the second end surface of the heat conduction sheet 3, and the third protective film layer plays a role of wrapping the second end surface, preventing the second end surface of the heat conduction sheet 3 from falling off. Dust effect, but also to avoid external dust pollution of the thermal pad 3.
  • the second protective film layer can be black single-sided adhesive tape
  • the third protective film layer can be black single-sided adhesive tape.
  • the baffle part 2 is integrally formed with the metal plate 1 .
  • the baffle part 2 and the metal plate 1 are integrally formed.
  • the metal plate 1 is formed by stamping or injection molding. After the metal plate 1 is formed, the baffle part 2 is formed on the metal plate 1 .
  • the baffle part 2 includes a first baffle 21 and a second baffle 22 , and the first baffle 21 is connected to the edge of the metal plate 1 , the second baffle 22 is located on the metal plate 1, and the second baffle 22 is connected to the edge of the notch 13, and the shape of the second baffle 22 matches the shape of the notch 13 .
  • the baffle part 2 includes a first baffle 21 and a second baffle 22, and the first baffle 21 and the second baffle 22 are combined to be located on the light path when the projector is in a dark state.
  • the first baffle 21 is integrally formed on the edge of the metal plate 1 .
  • the first baffle plate 21 is formed on the edge of the metal plate 1.
  • the joint between the first baffle plate 21 and the edge of the metal plate 1 is bent so that the first baffle plate 21 is bent to the edge of the metal plate 1.
  • On the first surface 11 that is, the plane where the first baffle 21 is located forms an included angle with the first surface 11 of the metal plate 1 .
  • the second baffle 22 is located on the metal plate 1 and connected to the edge of the notch 13 .
  • the second baffle 22 is molded on the metal plate 1 .
  • the second baffle 22 can completely cover the notch 13 .
  • the connection between the second baffle 22 and the notch 13 is bent, at this time the notch 13 is exposed, and the second baffle 22 is bent to the first surface 11 of the metal plate 1, that is, the second baffle
  • the plane where the plate 22 is located is set at an included angle with the first surface 11 of the metal plate 1 .
  • the method of forming the baffle part 2 on the metal plate 1 is simple, which is convenient for users to operate and use.
  • a light projection machine includes the light machine plate described in the first aspect.
  • the optical mechanical board provided by the embodiment of the present application is applied to the projection optical machine.
  • the optical mechanical board can dissipate the temperature of the baffle part 2 and the temperature of the lenses around the baffle part 2, reducing the temperature of the projection optical machine.
  • the internal temperature improves the service life of the projector light machine.
  • a DMD module is arranged on the light projection machine, and the baffle part 2 is located on the light path when the DMD module is in a dark state.
  • the DMD module includes a DMD device, and the DMD device has an "ON" state (that is, an open state) and an "OFF" state (that is, an off state or called a dark state), and the longer the time of the "ON” state (or “OFF The shorter the state time) the higher the brightness.
  • the DMD device when the DMD device is working, the light beam is incident on the surface of the DMD device at a certain angle.
  • the DMD device is in the "ON” state, the light reflected by the DMD device enters the lens module of the projection light machine and is finally projected onto the screen or the wall;
  • the DMD device is in the "OFF” state, the light reflected by the DMD device needs to avoid entering the lens module as much as possible.
  • the baffle part 2 can block the light beam of the DMD module in the dark state, and at the same time conduct heat through the metal plate 1 and the heat conducting sheet 3, so as to improve the heat dissipation efficiency of the baffle part 2 and the surrounding lenses. Further, the projection effect of the projection light machine is improved.
  • a prism assembly and a plastic lens are arranged in the projection light engine, and the plastic lens is arranged at a position adjacent to the prism assembly;
  • the baffle part 2 includes a first baffle 21 and a second baffle 22, the first baffle 21 is located on one side of the prism assembly, and the second baffle 22 is located on the other side of the prism assembly side, and the second baffle 22 is located between the prism assembly and the plastic lens.
  • the distance between the plastic lens and the baffle part 2 and the prism assembly is relatively short, and the temperature of the plastic lens will increase due to the location of the plastic lens.
  • the prism component is made of glass, and the heat-resistant temperature of the glass lens is higher than that of the plastic lens. Therefore, the metal plate 1 and the heat-conducting sheet 3 mainly reduce the temperature of the plastic lens.
  • the second baffle 22 is located in the lens group cavity of the projection light engine and between the prism assembly and the plastic lens, and the first baffle 21 is located on one side of the prism assembly, so that the first baffle 21 and The second baffle 22 wraps part of the top corners of the prism assembly. At this time, the light beam of the DMD module in the dark state will be blocked by the baffle part 2 before entering the lens module. Lens damage.
  • a heat sink is arranged on the projection light machine, and the heat conducting sheet 3 extends to the surface of the heat sink and is arranged in close contact with the surface of the heat sink.
  • the heat conduction sheet 3 in order to further improve the heat dissipation effect of the heat conducting sheet 3 on the interior of the projection light machine, the heat conduction sheet 3 can be extended to the heat sink of the projection light machine.
  • the heat conduction sheet 3 is placed in close contact with the surface of the heat sink to further increase the temperature of the baffle part 2 and the temperature of the lens around the baffle part 2 .
  • the heat sink installed on the projection light machine generally has a fan, and the cooling effect is further enhanced through the convection cooling of the fan device.

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Abstract

一种光机板以及投影光机。光机板应用于投影光机，光机板包括：金属板（1），金属板（1）具有相背设置的第一表面（11）和第二表面（12）；挡板部（2），挡板部（2）设置在第一表面（11），挡板部（2）设置在投影光机处于暗态时的光路上；导热片（3），在第一表面（11）和/或第二表面（12）上设置有导热片（3）。在金属板（1）的第一表面（11）和/或第二表面（12）上设置有导热片（3），导热片（3）降低了光机内部温度及挡板部（2）的温度。

Description

一种光机板以及投影光机 技术领域
本申请涉及光学设备技术领域，更具体地，本申请涉及一种光机板以及投影光机。
背景技术
数字光处理(Digital Light Processing，DLP)投影光机显示方式具有高亮度，高对比度，高分辨率的特点，与新型LED光源结合，能够实现小型化的便携式微型投影，受到越来越多用户的欢迎。
投影光机内部的光束调整模块包括各种镜片组合。镜片一般分为玻璃、塑胶两类，两种材质的镜片均有各自的优势和缺点，塑胶材质的镜片重量较小，但塑胶材质导热性能较差，并且塑胶材质的镜片在受热后易产生变形，如果工作过程中散发的热量不能及时疏导排出，将导致塑胶镜片变形，进而影响投影光机设备的成像效果。
发明内容
本申请的一个目的是提供一种光机板以及投影光机新技术方案。
根据本申请实施例的第一方面，提供了一种光机板。所述光机板应用于投影光机，所述光机板包括：
金属板，所述金属板具有相背设置的第一表面和第二表面；
挡板部，所述挡板部设置在所述第一表面，所述挡板部设置在投影光机处于暗态时的光路上；
导热片，在所述第一表面和/或所述第二表面上设置有所述导热片。
可选地，在与所述挡板部临近位置处，所述金属板上设置有缺口部，所述缺口部贯穿所述第一表面和所述第二表面；所述导热片盖设所述缺口部。
可选地，所述导热片为复合石墨片。
可选地，所述导热片与所述金属板的第一表面和/第二表面粘接。
可选地，所述导热片包括依次层叠设置的至少两片石墨片，相邻所述石墨片之间设置有粘接剂层；
其中一个所述石墨片背离所述粘接剂层的一侧设置有第一保护膜层；
另外一个所述石墨片背离所述粘接剂层的一侧设置有连接层，所述导热片通过所述连接层与所述金属板的第一表面和/或第二表面粘接。
可选地，在与所述导热片厚度垂直的方向上，所述导热片具有相背设置的第一端面和第二端面；
所述第一端面上设置有第二保护膜层，和/或所述第二端面上设置有第三保护膜层。
可选地，所述挡板部与所述金属板一体成型。
可选地，所述挡板部包括第一挡板和第二挡板，所述第一挡板与所述金属板的边缘连接，所述第二挡板位于所述金属板上，并且所述第二挡板与所述缺口部的边缘连接，所述第二挡板的形状与所述缺口部的形状吻合。
根据本申请实施例第二方面，提供了一种投影光机。所述投影光机包括第一方面所述的光机板。
可选地，所述投影光机上设置有DMD模块，所述挡板部位于所述DMD模块处于暗态时的光路上。
可选地，所述投影光机内设置有棱镜组件和塑胶镜片，在与所述棱镜组件的临近位置处，设置有所述塑胶镜片；
所述挡板部包括第一挡板和第二挡板，所述第一挡板位于所述所述棱镜组件的一侧，所述第二挡板位于所述棱镜组件的另一侧，并且所述第二挡板位于所述棱镜组件和所述塑胶镜片之间。
可选地，所述投影光机上设置有散热器，所述导热片延伸至所述散热器的表面，并与所述散热器的表面贴合设置。
在本申请实施例中，提供了一种光机板，在光机板的第一表面和/或第二表面上设置有导热片，导热片降低了光机内部温度及挡板部的温度。
通过以下参照附图对本申请的示例性实施例的详细描述，本申请的其 它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本申请的实施例，并且连同说明书一起用于解释本申请的原理。
图1所示为本申请实施例中光机板的一个视角的结构示意图。
图2所示为本申请实施例中光机板的另一个视角的结构示意图。
图3所示为本申请实施例中光机板的又一个视角的结构示意图。
图4所示为本申请实施例中导热片的结构示意图。
附图标记说明：
1、金属板；11、第一表面；12、第二表面；13、缺口部；
2、挡板部；21、第一挡板；22、第二挡板；
3、导热片；31、第一石墨片；32、第二石墨片；33、第三石墨片；34、第一粘接剂层；35、第二粘接剂层；36、第一保护膜层；37、连接层；38、第一离型膜；39、第二离型膜。
具体实施方式
现在将参照附图来详细描述本申请的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步 讨论。
本申请提供了一种光机板，光机板应用于投影光机，光机板起到导热作用，能够降低投影光机内部的温度。光机板可以是盖设在投影光机底壳上的光机盖板；或者光机板可以是光机底壳上的一块金属板。因此光机板可以是投影光机结构中的顶板或者底板。
参照图1-图3所示，光机板包括：金属板1、挡板部2和导热片3。
金属板1具有相背设置的第一表面11和第二表面12，在使用中，金属板1的第一表面11朝向投影光机内部设置，金属板1的第二表面12背离投影光机的内部设置。挡板部2设置在金属板1的第一表面11，导热片3设置在金属板1的第一表面11和/或第二表面12，导热片3结合金属板1，能够对挡板部2温度以及挡板部2周围镜片的温度进行降温处理。
金属板1的第一表面11上设置有挡板部2，挡板部2设置在投影光机处于暗态时的光路上。具体地，当投影光机投影出暗色画面时，大部分光线会投射到挡板部2上，挡板部2上的温度会升高；当挡板部2上的温度升高后，挡板部2温度会辐射到附近的镜片，导致镜片温度升高。因此当在投影光机处于暗态时，在投影光机内部，挡板部2以及挡板部2周围镜片的温度会升高，并且热量大多集中在挡板部2周围。
在现有技术中，挡板部2以及挡板部2周围镜片的温度通过金属板进行导热，但是金属板导热能力有限，并不能很好的降低挡板部2和挡板部2周围镜片的温度。特别的，挡板部2周围的镜片存在塑胶镜片时，塑胶镜片温度不能很快降低，塑胶镜片会发生膜裂、变形甚至烧熔的状态，很大程度的影响了投影光机的成像解析及使用寿命。
为此，本申请在金属板1的第一表面11和/或第二表面12上设置导热片3，导热片3具有导热作用，导热片3可快速改善投影光机内部热量集中的问题，对挡板部2以及其周围镜片进行降温处理。
在一个实施例中，在金属板1的第一表面11上设置导热片3。由于第一表面11上设置有挡板部2，在金属板1的第一表面11上设置导热片3时，导热片3需要避开挡板部2设置。在又一个实施中，在金属板1的第二表面12上设置导热片3。例如导热片3覆盖在第二表面12上。在另一 个实施例中，在金属板1的第一表面11和第二表面12上均设置有导热片3。
由于金属板1的第一表面11朝向投影光机内部设置，金属板1的第二表面12背离投影光机内部设置，在使用中，金属板1的第一表面11温度会较高于金属板1的第二表面12温度，例如金属板1的第一表面11会受到投影光机内部光线直射，第一表面11的温度高于第二表面12温度。为了避免设置在第一表面11上的导热片3直接受到光线直射，同时为了避免在高温环境中，导热片3与第一表面11的粘接剂发生熔融，特别地，将导热片3设置在金属板1的第二表面12上。
在本申请实施例中，导热片3具有导热散热效果，导热片3设置在金属板1的第一表面和/或第二表面上，金属板1结合导热片3，能够降低投影光机内部的温度，特别对挡板部2的温度以及挡板部2周围镜片的温度进行降低，提高镜片的使用可靠性，提升投影光机的使用寿命。另外本实施例中，导热片3设置在金属板1的第一表面11和/或第二表面12，在不需要对投影光机内部结构进行改动的情况下，实现对挡板部2及其周围镜片的快速散热处理，本实施例对挡板部2及其周围镜片实现散热的方法简单，操作性强。
在一个实施例中，参照图1-图3所示，在与所述挡板部2临近位置处，所述金属板1上设置有缺口部13，所述缺口部13贯穿所述第一表面11和所述第二表面12；所述导热片3盖设所述缺口部13。
本实施例中，在金属板1上形成缺口部13，缺口部13设置在挡板部2附近，使得缺口部13设置位置与挡板部2周围镜片的设置位置基本对应，缺口部13对应的镜片温度都相对偏高。本实施例导热片3的设置位置与挡板部2的位置对应，同时导热片3的设置位置与缺口部13的位置对应，使得导热片3能够提升挡板部2的散热效率以及挡板部2周围镜片的散热效率。在该实施例中，导热片3盖设在缺口部13上，导热片3具有挡光效果，避免了投影光机内部的一些光线从缺口部13传输至外界，另外也避免了外界光线从缺口部13进入投影光机内。
需要说明的是，为了尽快降低挡板部2以及其周围镜片的温度，不只 是在与挡板部2的设置位置对应处、以及在与挡板部2周围镜片的设置位置对应处设置有导热片3。本实施例导热片3设置在第一表面和/或第二表面12上。例如在一个具体的实施例中，导热片3可以覆盖金属板1的第二表面12，此时，有部分的导热片3与挡板部2的设置位置对应，同时有部分的导热片3与缺口部13的设置位置对应。
在一个实施例中，所述导热片3为复合石墨片。
在该实施例中，在金属板1的第一表面11和/或第二表面12上设置的导热片3为复合石墨片。使用复合石墨片进行导热散热，避免了单层石墨片由于脆性较大，容易断裂的情况。复合石墨片的二维平面的导热系数高达1500W/(m.K)，并且具有均热特性，复合石墨片可快速改善投影光机内部热量集中的问题，对挡板部2以及其周围镜片进行降温处理。
在该实施例中，导热片3为复合石墨片，复合石墨片包含了黑色的石墨片，黑色的石墨片具有挡光效果，避免了投影光机内部的一些光线从缺口部13传输至外界，另外也避免了外界光线从缺口部13进入投影光机内。
在一个实施例中，所述导热片3与所述金属板1的第一表面11和/或第二表面12粘接。
在该实施例中，导热片3粘接在金属板1的第一表面11和/或第二表面12上。例如以导热片3粘接在金属板1的第二表面12为例，准备好导热片3，按照避让螺丝锁附的位置对导热片3进行定位(即金属板1需要通过螺丝固定在投影光机的底壳上，在定位导热片3时需要对螺丝锁付的位置进行避让)，确认定位无误后，然后将导热片3贴附到金属板1的第二表面12上，并需要确保导热片3贴附良好，避免导热片3与金属板1之间出现开胶情况。
在一个实施例中，参照图4所示，所述导热片3包括层叠设置的至少两片石墨片，相邻所述石墨片之间设置有粘接剂层；
其中一个所述石墨片背离所述粘接剂层的一侧设置有第一保护膜层36；
另外一个所述石墨片背离所述粘接剂层的一侧设置有连接层37，所述导热片3通过所述连接层37与所述金属板1的第一表面和/或第二表面12 粘接。
在该实施例中，参照图4所示，导热片3包括层叠设置的三片石墨片，三片石墨片包括第一石墨片31、第二石墨片32和第三石墨片33。其中第一石墨片31与第二石墨片32相邻设置，第二石墨片32与第三石墨片33相邻设置。
其中第一石墨片31和第二石墨片32之间设置第一粘接剂层34，第一石墨片31和第二石墨片32通过第一粘接剂层34粘接。例如第一粘接剂层34为双面胶结构。
其中第二石墨片32和第三石墨片33之间设置有第二粘接剂层35，第二石墨片32和第三石墨片33通过第二粘接剂层35粘接。例如第二粘接剂层35为双面胶结构。其中第一粘接剂层34和第二粘接剂层35可以是同种类型的粘接剂层，或者第一粘接剂层34和第二粘接剂层35为不同类型的粘接剂层。
在该实施例中，在第一石墨片31远离第一粘接剂层34的一侧设置有第一保护膜层36，第一保护膜层36的一侧与第一石墨片31粘接，第一保护膜层36可以为黑色单面胶。第一保护膜层36设置为黑色单面胶，一方面能够起到挡光作用，另一方面通过黑色单面胶保护第一石墨片31，避免第一石墨片31表面出现碎屑等情况。
在该实施例中，在第三石墨片33远离第二粘接剂层35的一侧设置有连接层37，连接层37的一面与第三石墨片33连接，连接层37的另一面金属板1的第二表面12或者第一表面11连接。连接层37可以为黑色双面胶。连接层37设置为黑色双面胶，一方面能够起到挡光作用，另一方面黑色双面胶起到了连接作用。
在一个可选的实施例中，在第一保护膜层36远离第一石墨片31的一侧设置第一离型膜38。在连接层37远离第三石墨片33的一侧设置有第二离型膜39。在该实施例中，第一离型膜38和第二离型膜39对导热片3整体起到了保护作用。在使用时，将第一离型膜38从第一保护膜层36上剥离，以及将第二离型膜39从连接层37上剥离。
在一个实施例中，所述导热片3的厚度范围为2mm-4mm。
在该实施例中，对导热片3的厚度进行了限定，以降低导热片3的重量。本实施例将导热片3的厚度限定在此范围内，在满足导热片3导热散热的前提上，使得导热片3满足轻量化设计。
在一个实施例中，在与所述导热片3厚度垂直的方向上，所述导热片3具有相背设置的第一端面和第二端面；
所述第一端面上设置有第二保护膜层，和/或所述第二端面上设置有第三保护膜层。
在该实施例中，在导热片3的第一端面上设置第二保护膜层，第二保护膜层起到了包裹第一端面的作用，避免导热片3的第一端面出现掉屑作用，同时也避免了外界灰尘污染导热片3；在导热片3的第二端面上设置第三保护膜层，第三保护膜层起到了包裹第二端面的作用，避免导热片3的第二端面出现掉屑作用，同时也避免了外界灰尘污染导热片3。例如第二保护膜层可以是黑色单面胶，第三保护膜层可以是黑色单面胶。
在一个实施例中，参照图1-图3所示，所述挡板部2与所述金属板1一体成型。
在该实施例中，挡板部2和金属板1一体成型。例如通过冲压或者注塑方式成型金属板1，金属板1成型之后，挡板部2就成型在金属板1上。
在一个实施例中，参照图1-图3所示，所述挡板部2包括第一挡板21和第二挡板22，所述第一挡板21与所述金属板1的边缘连接，所述第二挡板22位于所述金属板1上，并且第二挡板22与所述缺口部13的边缘连接，所述第二挡板22的形状与所述缺口部13的形状吻合。
参照图1和图3所示，挡板部2包括第一挡板21和第二挡板22，第一挡板21和第二挡板22结合以位于投影光机处于暗态时的光路上。第一挡板21一体成型在金属板1的边缘上。例如第一挡板21成型在金属板1的边缘上，在使用时，将第一挡板21与金属板1的边缘连接处进行弯折，使得第一挡板21弯折至金属板1的第一表面11上，即第一挡板21所在平面与金属板1的第一表面11呈夹角设置。第二挡板22位于金属板1上，并与缺口部13的边缘连接。例如第二挡板22成型在金属板1上，在未使用时，由于第二挡板22的形状与所述缺口部13的形状吻合，第二挡板22 能够完全盖设在缺口部13。在使用时，将第二挡板22与缺口部13的连接处进行弯折，此时缺口部13露出，第二挡板22弯折至金属板1的第一表面11上，即第二挡板22所在平面与金属板1的第一表面11呈夹角设置。
在该实施例中，在金属板1上成型挡板部2的方式简单，便于用户操作和使用。
根据本申请实施例第二方面，提供了一种投影光机。所述投影光机包括第一方面所述的光机板。
在该实施例中，将本申请实施例提供的光机板应用在投影光机上，光机板能够对挡板部2温度以及挡板部2周围镜片的温度进行散热处理，降低了投影光机内部的温度，提升了投影光机的使用寿命。
在一个实施例中，所述投影光机上设置有DMD模块，所述挡板部2位于所述DMD模块处于暗态时的光路上。
具体地，DMD模块包括DMD器件，DMD器件其具有“ON”状态(即开状态)与“OFF”状态(即关状态或者称为暗态)，“ON”状态的时间越长(或“OFF”状态的时间越短)亮度越高。具体地，DMD器件工作时，光束以一定的角度入射DMD器件表面，当DMD器件处于“ON”状态时，DMD器件反射的光进入投影光机的镜头模块，最终投影到屏幕或者墙面上；当DMD器件处于“OFF”状态时，DMD器件反射的光线需要尽量避免进入镜头模块。
在该实施例中，挡板部2对DMD模块在暗态时的光束能够进行阻挡，同时通过金属板1和导热片3将热量传导出去，提升挡板部2和其周围镜片的散热效率，进而提高投影光机的投影效果。
在一个实施例中，所述投影光机内设置有棱镜组件和塑胶镜片，在与所述棱镜组件的临近位置处，设置有所述塑胶镜片；
所述挡板部2包括第一挡板21和第二挡板22，所述第一挡板21位于所述棱镜组件的一侧，所述第二挡板22位于所述棱镜组件的另一侧，并且所述第二挡板22位于所述棱镜组件和所述塑胶镜片之间。
在该实施例中，塑胶镜片距离挡板部2及棱镜组件的距离相对较近，塑胶镜片因为其位置设置会导致塑胶镜片的温度增高。一般情况下，棱镜组件采用玻璃材质，玻璃材质的镜片耐热温度大于塑胶镜片的耐热稳定， 因此金属板1以及导热片3主要是降低塑胶镜片温度。
在该实施例中，第二挡板22位于投影光机的镜组腔内且位于棱镜组件与塑胶镜片之间，以及第一挡板21位于棱镜组件的一侧，使得第一挡板21和第二挡板22包裹棱镜组件的部分顶角部。此时DMD模块在暗态时的光束在进入到镜头模块之前会被挡板部2遮挡，塑胶镜片温度的温度能够通过金属板1和导热片3尽快传导至投影光机外部，从而防止对塑胶镜片的损伤。
在一个实施例中，所述投影光机上设置有散热器，所述导热片3延伸至所述散热器的表面，并与所述散热器的表面贴合设置。
在该实施例中，为了进一步提升导热片3对投影光机内部的散热效果，可以将导热片3延伸至投影光机的散热器上。例如通过增大导热片3的表面积，使得导热片3与散热器的表面贴合设置，进一步提升对挡板部2温度和挡板部2周围的镜片温度。另外设置在投影光机的散热器一般会有风扇设置，通过风扇设备对流散热，进一步强化散热效果。
上文实施例中重点描述的是各个实施例之间的不同，各个实施例之间不同的优化特征只要不矛盾，均可以组合形成更优的实施例，考虑到行文简洁，在此则不再赘述。
虽然已经通过示例对本申请的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本申请的范围。本领域的技术人员应该理解，可在不脱离本申请的范围和精神的情况下，对以上实施例进行修改。本申请的范围由所附权利要求来限定。

Claims (12)

  1. 一种光机板，其特征在于，所述光机板应用于投影光机，所述光机板包括：
    金属板(1)，所述金属板(1)具有相背设置的第一表面(11)和第二表面(12)；
    挡板部(2)，所述挡板部(2)设置在所述第一表面(11)，所述挡板部(2)设置在投影光机处于暗态时的光路上；
    导热片(3)，在所述第一表面(11)和/或所述第二表面(12)上设置有所述导热片(3)。
  2. 根据权利要求1所述的光机板，其特征在于，在与所述挡板部(2)临近位置处，所述金属板(1)上设置有缺口部(13)，所述缺口部(13)贯穿所述第一表面(11)和所述第二表面(12)，所述导热片(3)盖设所述缺口部(13)。
  3. 根据权利要求1所述的光机板，其特征在于，所述导热片(3)为复合石墨片。
  4. 根据权利要求1所述的光机板，其特征在于，所述导热片(3)与所述金属板(1)的第一表面和/或第二表面(12)粘接。
  5. 根据权利要求1或3所述的光机板，其特征在于，所述导热片(3)包括层叠设置的至少两片石墨片，相邻所述石墨片之间设置有粘接剂层；
    其中一个所述石墨片背离所述粘接剂层的一侧设置有第一保护膜层(36)；
    另外一个所述石墨片背离所述粘接剂层的一侧设置有连接层(37)，所述导热片(3)通过所述连接层(37)与所述金属板(1)的第一表面和/或第二表面(12)粘接。
  6. 根据权利要求1所述的光机板，其特征在于，在与所述导热片(3)厚度垂直的方向上，所述导热片(3)具有相背设置的第一端面和第二端面；
    所述第一端面上设置有第二保护膜层，和/或所述第二端面上设置有第三保护膜层。
  7. 根据权利要求1所述的光机板，其特征在于，所述挡板部(2)与所述金属板(1)一体成型。
  8. 根据权利要求2所述的光机板，其特征在于，所述挡板部(2)包括第一挡板(21)和第二挡板(22)，所述第一挡板(21)与所述金属板(1)的边缘连接，所述第二挡板(22)位于所述金属板(1)上，并且所述第二挡板(22)与所述缺口部(13)的边缘连接，所述第二挡板(22)的形状与所述缺口部(13)的形状吻合。
  9. 一种投影光机，其特征在于，所述投影光机包括如权利要求1-8任一项所述的光机板。
  10. 根据权利要求9所述的投影光机，其特征在于，所述投影光机上设置有DMD模块，所述挡板部(2)位于所述DMD模块处于暗态时的光路上。
  11. 根据权利要求10所述的投影光机，其特征在于，所述投影光机内设置有棱镜组件和塑胶镜片，在与所述棱镜组件的临近位置处，设置有所述塑胶镜片；
    所述挡板部(2)包括第一挡板(21)和第二挡板(22)，所述第一挡板(21)位于所述棱镜组件的一侧，所述第二挡板(22)位于所述棱镜组件的另一侧，并且所述第二挡板(22)位于所述棱镜组件和所述塑胶镜片之间。
  12. 根据权利要求9所述的投影光机，其特征在于，所述投影光机上 设置有散热器，所述导热片(3)延伸至所述散热器的表面，并与所述散热器的表面贴合设置。
PCT/CN2022/100342 2022-02-25 2022-06-22 一种光机板以及投影光机 WO2023159818A1 (zh)

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JP2011233734A (ja) * 2010-04-28 2011-11-17 Nippon Drawing Co Ltd 複合熱伝導部材
US20160076829A1 (en) * 2013-04-26 2016-03-17 3M Innovative Properties Company Heat dissipating sheet
US20190373775A1 (en) * 2017-02-06 2019-12-05 Panasonic Intellectual Property Management Co., Ltd. Heat conductive sheet and multilayered heat conductive sheet
CN215416249U (zh) * 2021-06-23 2022-01-04 深圳市安华光电技术有限公司 用于投影光机的挡光散热组件、投影光机以及投影仪

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Publication number Priority date Publication date Assignee Title
CN215416250U (zh) * 2021-06-23 2022-01-04 深圳市安华光电技术有限公司 投影光机及投影设备

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Publication number Priority date Publication date Assignee Title
JP2011233734A (ja) * 2010-04-28 2011-11-17 Nippon Drawing Co Ltd 複合熱伝導部材
US20160076829A1 (en) * 2013-04-26 2016-03-17 3M Innovative Properties Company Heat dissipating sheet
US20190373775A1 (en) * 2017-02-06 2019-12-05 Panasonic Intellectual Property Management Co., Ltd. Heat conductive sheet and multilayered heat conductive sheet
CN215416249U (zh) * 2021-06-23 2022-01-04 深圳市安华光电技术有限公司 用于投影光机的挡光散热组件、投影光机以及投影仪

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