Optical machine

Abstract

An optical machine includes an illumination module and an imaging module. The lighting module comprises a light source, and the imaging module comprises a liquid crystal panel. The optical machine further comprises a first heat-conducting fin, a second heat-conducting fin and an adjusting piece. The first heat-conducting fin comprises a first end and a second end, and the first end of the first heat-conducting fin is connected with the light source. The second heat-conducting fin comprises a first end and a second end, and the first end of the second heat-conducting fin is connected with the liquid crystal panel. The adjusting piece is connected with at least one of the first heat-conducting piece and the second heat-conducting piece. The adjusting part is used for keeping the first heat-conducting fin connected with the second heat-conducting fin when the temperature of the liquid crystal panel is lower than the critical temperature so that heat generated by the light source can be conducted to the liquid crystal panel. The adjusting piece is further used for disconnecting the first heat conduction piece from the second heat conduction piece when the temperature of the liquid crystal panel reaches or exceeds the critical temperature. The response speed of the liquid crystal panel is improved by utilizing the heat of the light source, the light source can be cooled to improve the brightness, and the temperature of the liquid crystal panel can be improved to accelerate the response speed.

Description

Technical Field

[0001] The present application relates to the technical field of projection optical equipment, and in particular to an optical machine. Background Art

[0002] With the development of Virtual Reality (VR) / Augmented Reality (AR) technology, people's pursuit of visual experience is gradually being met. Head-mounted devices can free people's hands, reduce dependence on screens, and create better visual effects. For head-mounted devices, near-eye display is the key to its technology, and imaging quality and lightness are the main considerations. The near-eye display system is generally composed of an image high and low light transmission system. The image emitted by the image source is transmitted to the human eye through an optical transmission system. Here, unlike VR's blocking of the external environment, AR requires a certain transmittance so that the wearer can see the external environment while seeing the image.

[0003] At present, there are many solutions for near-eye display optical machines, such as Digital Light Processing (DLP) solution, LCOS solution, Laser Beam Scanning (LBS) solution, microLED solution, micro OLED solution, etc. LCOS optical machines require an additional light source system to provide illumination. In LCOS optical machines, the flipping speed of the liquid crystal (or response speed) directly affects its color expression. If the liquid crystal response speed is slow, color mixing will occur, that is, the displayed color is inconsistent with the desired color. In order to ensure that there is no color mixing, one method is to shorten the lighting time and wait until the liquid crystal is completely flipped to the dark state before turning on the light, which will inevitably cause the brightness of the optical machine to decrease. Utility Model Content

[0004] In view of this, the present application provides an optical machine, including an illumination module and an imaging module, wherein the illumination module includes a light source, the imaging module includes a liquid crystal panel, and the optical machine further includes:

[0005] a first heat conducting plate, comprising a first end and a second end, wherein the first end of the first heat conducting plate is connected to the light source;

[0006] a second heat conducting plate, comprising a first end and a second end, wherein the first end of the second heat conducting plate is connected to the liquid crystal panel;

[0007] an adjusting member connected to at least one of the first heat conducting plate and the second heat conducting plate;

[0008] The adjusting member is used to keep the first heat conducting plate connected to the second heat conducting plate when the temperature of the liquid crystal panel is lower than a critical temperature so that the heat generated by the light source is transferred to the liquid crystal panel;

[0009] The adjusting member is further configured to disconnect the first heat conducting plate from the second heat conducting plate when the temperature of the liquid crystal panel reaches or exceeds a critical temperature.

[0010] The optical machine of the present application effectively controls whether the heat generated by the light source is transferred to the liquid crystal panel through the coordinated arrangement of the first and second heat conducting plates and the adjusting member. Within a suitable temperature range, the adjusting member controls the connection between the first and second heat conducting plates to transfer the heat of the light source to the liquid crystal module. When the temperature exceeds the suitable temperature range, the adjusting member controls the disconnection between the first and second heat conducting plates to prevent the heat of the light source from being transferred to the liquid crystal module. In this way, the heat of the light source is used to increase the response speed of the liquid crystal panel, which can not only dissipate heat from the light source and increase its brightness, but also increase the temperature of the liquid crystal panel to speed up its response speed. This improves the overall brightness of the optical machine without color mixing, and at the same time ensures that the liquid crystal panel will not fail due to excessive temperature, thereby significantly improving the competitiveness of near-eye display optical machines based on non-self-luminous display chips.

[0011] In some embodiments, the adjusting member is disposed between the first heat conducting plate and the second heat conducting plate, and the adjusting member is made of a heat conducting material that expands when cold and contracts when hot;

[0012] One of the second end of the first heat conducting plate and the second end of the second heat conducting plate is fixedly connected to the adjusting member;

[0013] When the temperature of the liquid crystal panel is lower than the critical temperature, the other of the second end of the first heat conducting plate and the second end of the second heat conducting plate maintains abutting contact with the adjusting member;

[0014] When the temperature of the liquid crystal panel reaches or exceeds a critical temperature, the other of the second end of the first heat conducting plate and the second end of the second heat conducting plate is disconnected from the adjustment member.

[0015] In some embodiments, the optical engine further comprises a fixing member fixedly disposed within the optical engine, one end of the adjusting member is fixedly connected to the fixing member, and the other end of the adjusting member is used to connect to the first heat conducting plate or the second heat conducting plate, and the adjusting member is made of a heat conducting material that expands with heat and contracts with cold;

[0016] When the temperature of the liquid crystal panel is higher than a critical value, the adjusting member pushes the first heat conducting plate or the second heat conducting plate to disconnect the first heat conducting plate from the second heat conducting plate.

[0017] In some embodiments, the liquid crystal panel has a light emitting surface, the first thermal conductive sheet extends beyond the second thermal conductive sheet in a direction parallel to the light emitting surface, the adjusting member and the fixing member are arranged relative to the area where the first thermal conductive sheet extends beyond the second thermal conductive sheet, the adjusting member is located between the fixing member and the first thermal conductive sheet, and the adjusting member is used to push the first thermal conductive sheet to disconnect the first thermal conductive sheet from the second thermal conductive sheet.

[0018] In some embodiments, the light source has a light emitting surface, the second heat conducting plate extends beyond the first heat conducting plate in a direction parallel to the light emitting surface, the adjusting member and the fixing member are arranged relative to the area where the second heat conducting plate extends beyond the first heat conducting plate, the adjusting member is located between the fixing member and the second heat conducting plate, and the adjusting member is used to push the second heat conducting plate to disconnect the second heat conducting plate from the first heat conducting plate.

[0019] In some embodiments, the light source has a light emitting side, and the first heat conductive sheet is connected to a surface of the light source facing away from the light emitting side; and / or

[0020] The liquid crystal panel has a light emitting side, and the second heat conducting sheet is connected to a surface of the liquid crystal panel facing away from the light emitting side.

[0021] In some embodiments, the light source is located beside the liquid crystal panel.

[0022] The first heat conducting sheet is an L-shaped structure, a first end of the L-shaped structure is connected to the light source, and the other end of the L-shaped structure extends to the bottom of the liquid crystal panel; or

[0023] The second heat conducting sheet is an L-shaped structure, a first end of the L-shaped structure is connected to the liquid crystal panel, and the other end of the L-shaped structure extends to the bottom of the light source.

[0024] The present application further provides an optical machine, comprising an illumination module and an imaging module, wherein the illumination module comprises a light source, the imaging module comprises a liquid crystal panel, and the optical machine further comprises:

[0025] a heat conducting sheet, comprising a first end and a second end, wherein the first end of the heat conducting sheet is connected to the light source, and the second end is used to connect to the liquid crystal panel;

[0026] an adjusting member connected to at least one of the heat conducting sheet and the liquid crystal panel;

[0027] The adjusting member is used to keep the heat conducting sheet connected to the liquid crystal panel when the temperature of the liquid crystal panel is lower than a critical temperature so that the heat generated by the light source is transferred to the liquid crystal panel;

[0028] The regulating member is further configured to disconnect the heat conducting sheet from the liquid crystal panel when the temperature of the liquid crystal panel reaches or exceeds a critical temperature.

[0029] The optical engine of this application effectively controls whether the heat generated by the light source is transferred to the liquid crystal panel through the coordinated arrangement of a heat conducting sheet and an adjusting member. Within a suitable temperature range, the heat conducting sheet is connected between the light source and the liquid crystal panel to transfer the heat from the light source to the liquid crystal module. When the temperature exceeds the suitable temperature range, the adjusting member disconnects the heat conducting sheet from the liquid crystal panel, preventing the heat from the light source from being transferred to the liquid crystal panel. In this way, the heat from the light source is used to increase the response speed of the liquid crystal panel, dissipating heat from the light source to increase its brightness while also increasing the temperature of the liquid crystal panel to speed up its response. This improves the overall brightness of the optical engine without color mixing, while also preventing the liquid crystal panel from overheating and failing, significantly enhancing the competitiveness of near-eye display optical engines based on non-self-luminous display chips.

[0030] In some embodiments, the adjusting member is disposed between the thermally conductive sheet and the liquid crystal panel, the adjusting member is fixedly connected to the second end of the thermally conductive sheet or the liquid crystal panel, and the adjusting member is made of a thermally conductive material that expands when heated and contracts when heated;

[0031] When the temperature of the liquid crystal panel is lower than the critical temperature, the second end of the liquid crystal panel or the heat conducting sheet maintains abutting contact with the adjusting member;

[0032] When the temperature of the liquid crystal panel reaches or exceeds a critical temperature, the liquid crystal panel or the second end of the heat conducting sheet is disconnected from the adjusting member.

[0033] In some embodiments, the optical engine further comprises a fixing member fixedly disposed in the optical engine, one end of the adjusting member is fixedly connected to the fixing member, and the other end of the adjusting member is connected to the heat conducting sheet, and the adjusting member is made of a heat conducting material that expands with heat and contracts with cold;

[0034] When the temperature of the liquid crystal panel is higher than a critical value, the adjusting member pushes the heat conducting sheet to disconnect the heat conducting sheet from the liquid crystal panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the optical engine according to the first embodiment of the present application.

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of another state of the optical machine.

[0037] Figure 3 This is a structural diagram of the optical engine according to the second embodiment of the present application.

[0038] Figure 4 for Figure 3 Schematic diagram of the structure of another state of the optical machine.

[0039] Figure 5 This is a schematic structural diagram of the optical engine according to the third embodiment of the present application.

[0040] Figure 6 for Figure 5 Schematic diagram of the structure of another state of the optical machine.

[0041] Figure 7 This is a schematic structural diagram of the optical engine according to the third embodiment of the present application.

[0042] Figure 8 for Figure 7 Schematic diagram of the structure of another state of the optical machine.

[0043] Description of main component symbols:

[0044] Optical machine 100, 200

[0045] Light source 10

[0046] LCOS liquid crystal panel 20

[0047] First heat conducting sheet 11

[0048] Second heat conducting sheet 12

[0049] Adjusting members 15A, 15B

[0050] Beam splitter prism 30

[0051] Lens group 40

[0052] Fixing 17 DETAILED DESCRIPTION

[0053] In LCOS optical engines, the upper limit of the engine's brightness is limited by the response speed of the liquid crystal and the heat dissipation of the light source. The lower the light source temperature, the higher the light efficiency. The higher the liquid crystal temperature, the faster the liquid crystal response speed, and the higher the upper limit of the engine's brightness, while ensuring no color mixing. Therefore, if the heat from the light source can be transferred to the LCOS panel, this would both reduce the light source temperature and increase the panel's response speed, significantly raising the upper limit of the engine's brightness. At the same time, the liquid crystal temperature should not be too high; generally, failure will occur above 85°C. Therefore, it is necessary to control the liquid crystal temperature within an appropriate range.

[0054] The present application provides an optical machine that conducts heat generated by a light source to a liquid crystal module and effectively controls whether the heat is conducted to the liquid crystal module by setting an adjustment component. Within a suitable temperature range, the adjustment component conducts the heat of the light source to the liquid crystal module. When the temperature exceeds the suitable range, the adjustment component stops the heat of the light source from being conducted to the liquid crystal module.

[0055] Example 1

[0056] like Figure 1 As shown, the optical engine 100 of the first embodiment of the present application is an LCOS optical engine, comprising an illumination module and an imaging module. The illumination module includes a light source 10. The imaging module includes a liquid crystal panel. In this embodiment, the liquid crystal panel is an LCOS liquid crystal panel 20, but this is not limiting. During operation of the optical engine 100, the light source 10 is used to emit light. The LCOS liquid crystal panel 20 is used to modulate the light source light to produce image light.

[0057] The optical engine 100 further includes a first heat conducting plate 11, a second heat conducting plate 12, and an adjustment member 15A. The first heat conducting plate 11 includes a first end and a second end. The first end is directly connected to the light source 10 to receive and conduct heat generated by the light source 10. The second heat conducting plate 12 also includes a first end and a second end. The first end is directly connected to the LCOS liquid crystal panel 20. The second heat conducting plate 12 is configured to selectively connect to the first heat conducting plate 11. When connected, the second heat conducting plate 12 transfers heat from the light source 10, conducted by the first heat conducting plate 11, to the LCOS liquid crystal panel 20.

[0058] In this embodiment, Figure 1 As shown, the adjusting member 15A is arranged between the second end of the first thermal conductive sheet 11 and the second end of the second thermal conductive sheet 12, and the adjusting member 15A is fixedly connected to one of the first thermal conductive sheet 11 and the second thermal conductive sheet 12, and is in abutting contact with the other of the first thermal conductive sheet 11 and the second thermal conductive sheet 12. That is, the adjusting member 15A serves as a connecting medium between the first thermal conductive sheet 11 and the second thermal conductive sheet 12. The adjusting member 15A has a good heat conduction effect so as not to affect the heat conduction function. In addition, the adjusting member 15A adopts cold expansion and heat contraction materials. The cold expansion and heat contraction materials can be some conventional cold expansion and heat contraction materials, such as antimony, bismuth, gallium, rubber, etc.

[0059] By utilizing the cold expansion and heat contraction effect of the adjusting member 15A itself, the adjusting member 15A has two states: one is that the adjusting member 15A is connected to both the first heat conducting sheet 11 and the second heat conducting sheet 12, so that heat can be transferred from the first heat conducting sheet 11 to the second heat conducting sheet 12; the other is that after the adjusting member 15A contracts, it is disconnected from the first heat conducting sheet 11 or the second heat conducting sheet 12, so that heat cannot be transferred from the first heat conducting sheet 11 to the second heat conducting sheet 12. Figure 2 As shown. Thus, when the temperature is below the critical temperature, the adjustment member 15A remains connected to both the first and second thermally conductive sheets 11, 12. When the temperature reaches or exceeds the critical temperature, the adjustment member 15A disconnects the first and second thermally conductive sheets 11, 12. The critical temperature can be set to a temperature below 85°C, for example, 80°C or 75°C.

[0060] In the embodiment of the present application, the adjusting member 15A is fixed on the second heat conducting plate 12 and is in contact with the first heat conducting plate 11. In other embodiments, the adjusting member 15A may also be fixed on the first heat conducting plate 11 and in contact with the second heat conducting plate 12.

[0061] In this way, heat generated by the light source 10 passes through the first thermal conductive sheet 11, the adjustment member 15A, and the second thermal conductive sheet 12 in sequence before being transferred to the LCOS panel 20. This increases the temperature of the LCOS panel 20 and speeds up its response. When the temperature of the LCOS panel 20 rises to a critical temperature, the thermal expansion and contraction effect causes the adjustment member 15A to contract, disconnecting it from the first thermal conductive sheet 11 and connecting only to the second thermal conductive sheet 12. This prevents heat from the light source 10 from being transferred to the LCOS panel 20. When the temperature drops, the adjustment member 15A expands in response to the cold and reconnects to the first thermal conductive sheet 11. This allows heat from the light source 10 to continue to pass through the first thermal conductive sheet 11, the adjustment member 15A, and the second thermal conductive sheet 12 in sequence before being transferred to the LCOS panel 20. This allows the temperature of the LCOS panel 20 to be controlled within a certain range, ensuring a faster response time without overheating the liquid crystal.

[0062] It can be understood that the adjusting member 15A can be fixed on the second heat conducting plate 12 or the first heat conducting plate 11 by adhesive, fasteners or the like.

[0063] It can be understood that the materials of the first heat conducting plate 11 and the second heat conducting plate 12 can be some materials with good heat conductivity commonly used in the art.

[0064] The light source 10 has a light emitting side, and the first heat conducting plate 11 is connected to the surface of the light source 10 facing away from the light emitting side so as not to affect the light emission of the light source 10. In addition, in the embodiment of the present application, the first heat conducting plate 11 completely covers the surface of the light source 10 facing away from the light emitting side to better receive heat from the light source 10.

[0065] The LCOS panel 20 has a light-emitting side, and the second heat-conducting sheet 12 is connected to the surface of the LCOS panel 20 facing away from the light-emitting side so as not to affect the light emission of the LCOS panel 20. In addition, in the embodiment of the present application, the second heat-conducting sheet 12 completely covers the surface of the LCOS panel 20 facing away from the light-emitting side to evenly transfer heat to the LCOS panel 20.

[0066] In addition, because the surface of the light source 10 facing away from the light output side and the surface of the LCOS panel 20 facing away from the light output side in the optical engine 100 are not directly opposite each other, in the embodiment of the present application, the first thermal conductive sheet 11 extends beyond the surface of the light source 10 facing away from the light output side and bends and extends to connect to the second thermal conductive sheet 12. The first thermal conductive sheet 11 extends and completely covers the second thermal conductive sheet 12, so that a portion of the first thermal conductive sheet 11 and the second thermal conductive sheet 12 are stacked one above the other, and the adjustment member 15A is located in the middle of the stacked portion of the first thermal conductive sheet 11 and the second thermal conductive sheet 12.

[0067] like Figures 1 to 4 As shown, the light source 10 is located next to the LCOS liquid crystal panel 20, and the first heat conductive plate 11 is an L-shaped structure. The first end of the L-shaped structure is connected to the light source 10, and the other end of the L-shaped structure extends to the bottom of the LCOS liquid crystal panel 20 (away from the light emitting side).

[0068] Although not shown, in other embodiments, the second heat conducting plate 12 is an L-shaped structure, a first end of the L-shaped structure is connected to the LCOS liquid crystal panel 20, and the other end of the L-shaped structure extends to the bottom of the light source 10 (away from the light emitting side).

[0069] Although not shown, in other embodiments, the second heat conducting plate 12 may extend beyond the surface of the LCOS panel 20 facing away from the light emitting side, and bend and extend to connect to the first heat conducting plate 11 .

[0070] The optical engine 100 includes not only the light source 10 and the LCOS liquid crystal panel 20, but also other components. Figure 1 As shown, the imaging module further includes a beam splitter prism 30 and a lens group 40 .

[0071] The beam splitter prism 30 is located on the light output path of the light source 10 and is used to receive light from the light source 10 and reflect the light to the LCOS liquid crystal panel 20. The LCOS liquid crystal panel 20 modulates the received light and transmits it through the beam splitter prism 30.

[0072] The lens assembly 40 and the LCOS liquid crystal panel 20 are disposed on opposite sides of the beam splitter prism 30. The lens assembly 40 is positioned in the light path transmitted by the beam splitter prism 30 and is used to image the light modulated by the LCOS liquid crystal panel 20. This arrangement enables the lens assembly 40 to receive light modulated by the LCOS liquid crystal panel 20 and transmitted through the beam splitter prism 30, allowing the lens assembly 40 to project the light to form a virtual image, thereby achieving display.

[0073] The lens group 40 is composed of multiple lenses, and the specific number of lenses and the optical focal length, surface shape and size of the lenses can be set according to actual needs. Figure 1 As shown, the lens group 40 includes three lenses arranged in sequence, which is only for illustration.

[0074] Example 2

[0075] The optical engine 200 of the second embodiment of the present application has a substantially identical structure to the optical engine 100 of the first embodiment, and also includes the same lighting module and imaging module, as well as the first heat conducting plate 11 and the second heat conducting plate 12; the difference is that the material and the setting position of the adjustment member 15B are different, such as Figure 3 shown.

[0076] like Figure 3 As shown, in the optical engine 200 , the first end of the first heat conducting plate 11 is connected to the light source 10 , and the second end is connected to the second heat conducting plate 12 . The first end of the second heat conducting plate 12 is connected to the LCOS panel 20 , and the second end is connected to the first heat conducting plate 11 .

[0077] like Figure 3 As shown, similarly, the light source 10 has a light emitting side, the first heat conducting plate 11 is connected to the surface of the light source 10 facing away from the light emitting side, the LCOS liquid crystal panel 20 has a light emitting side, and the second heat conducting plate 12 is connected to the surface of the LCOS liquid crystal panel 20 facing away from the light emitting side. The surface of the light source 10 facing away from the light emitting side and the surface of the LCOS liquid crystal panel 20 facing away from the light emitting side are not arranged directly opposite each other. In the embodiment of the present application, the first heat conducting plate 11 extends beyond the surface of the light source 10 facing away from the light emitting side, and bends and extends to connect to the second heat conducting plate 12. In other embodiments, the second heat conducting plate 12 may also extend beyond the surface of the LCOS liquid crystal panel 20 facing away from the light emitting side, and bends and extends to connect to the first heat conducting plate 11.

[0078] In the embodiment of the present application, the adjusting member 15B is made of a thermal expansion and contraction material, which can be some conventional thermal expansion and contraction materials.

[0079] The optical engine 200 further includes a fixing member 17 fixedly disposed in the optical engine 200, and the adjusting member 15B is fixedly connected to the fixing member 17. Figure 3 As shown, the adjusting member 15B and the fixing member 17 are arranged on one side of the connection between the first thermally conductive sheet 11 and the second thermally conductive sheet 12. The fixing member 17 is arranged on the side of the first thermally conductive sheet 11 facing the second thermally conductive sheet 12, and the fixing member 17 is spaced apart from the first thermally conductive sheet 11. The adjusting member 15B is located between the fixing member 17 and the first thermally conductive sheet 11, and the adjusting member 15B is in contact with the first thermally conductive sheet 11 or maintains a small distance therebetween. The adjusting member 15B is used to push the first thermally conductive sheet 11 against and disconnect the first thermally conductive sheet 11 from the second thermally conductive sheet 12 during expansion. One end of the adjusting member 15B is fixedly connected to the fixing member 17, and the other end is used to connect to the first thermally conductive sheet 11.

[0080] By utilizing the thermal expansion and contraction effect of the adjusting member 15B itself, the adjusting member 15B has two states: one is that the first heat conducting sheet 11 and the second heat conducting sheet 12 are in contact and connected, at this time, heat can be transferred from the first heat conducting sheet 11 to the second heat conducting sheet 12, and the adjusting member 15B is in contact with the first heat conducting sheet 11 or has a small distance from the first heat conducting sheet 11; the other is that after the adjusting member 15B expands, the adjusting member 15B pushes against the first heat conducting sheet 11, so that the first heat conducting sheet 11 and the second heat conducting sheet 12 are disconnected, as shown in FIG. Figure 4 As shown, heat cannot be transferred from the first heat conducting sheet 11 to the second heat conducting sheet 12. Thus, when the temperature is below the critical temperature, the first heat conducting sheet 11 and the second heat conducting sheet 12 remain connected, and when the temperature reaches or exceeds the critical temperature, the regulating member 15B disconnects the first heat conducting sheet 11 and the second heat conducting sheet 12.

[0081] The LCOS panel 20 has a light-emitting surface. In the embodiment of the present application, the first thermally conductive sheet 11 extends to completely cover the second thermally conductive sheet 12 and extends beyond the second thermally conductive sheet 12 in a direction parallel to the light-emitting surface of the LCOS panel 20. The adjusting member 15B and the fixing member 17 are disposed opposite the region where the first thermally conductive sheet 11 extends beyond the second thermally conductive sheet 12. The fixing member 17 is located on the side of the adjusting member 15B facing away from the first thermally conductive sheet 11.

[0082] The light source 10 has a light-emitting surface. Although not shown, in other embodiments, the second thermally conductive sheet 12 may extend to completely cover the first thermally conductive sheet 11 and extend beyond the first thermally conductive sheet 11 in a direction parallel to the light-emitting surface of the light source 10. The adjusting member 15B and the fixing member 17 are disposed opposite the area where the second thermally conductive sheet 12 extends beyond the first thermally conductive sheet 11. The adjusting member 15B is located between the fixing member 17 and the second thermally conductive sheet 12, and the adjusting member 15B and the second thermally conductive sheet 12 are in contact or maintain a small distance therefrom. The fixing member 17 is located on the side of the adjusting member 15B facing away from the second thermally conductive sheet 12.

[0083] In this way, heat generated by the light source 10 passes through the first and second heat conducting plates 11, 12, and then is transferred to the LCOS panel 20, causing the temperature of the LCOS panel 20 to rise and accelerating its response speed. When the temperature of the LCOS panel 20 rises to a critical temperature, the thermal expansion and contraction effect causes the adjustment member 15B to expand. This pushes against the second heat conducting plate 12, disconnecting it from the first heat conducting plate 11, thus preventing heat from the light source 10 from being transferred to the LCOS panel 20. When the temperature drops, the adjustment member 15B contracts due to the cold, causing the second heat conducting plate 12 to reconnect with the first heat conducting plate 11. This allows heat from the light source 10 to continue to pass through the first and second heat conducting plates 11, 12, and finally to be transferred to the LCOS panel 20. This allows the temperature of the LCOS panel 20 to be controlled within a certain range, ensuring a fast response time and preventing overheating and failure of the liquid crystal.

[0084] It is understandable that the adjusting member 15B may be fixed to the fixing member 17 by adhesive, fasteners, or the like.

[0085] Example 3

[0086] like Figure 5 and Figure 6 In the third embodiment, the second heat conducting plate 12 of the optical engine 100 of the first embodiment is omitted, and an adjustment member 15A (made of a cold-expanding and heat-contracting material) is disposed between the first heat conducting plate 11 and the LCOS liquid crystal panel 20. The adjustment member 15A is fixedly connected to the second end of the first heat conducting plate 11 or the LCOS liquid crystal panel 20. Preferably, the adjustment member 15A is fixedly connected to the LCOS liquid crystal panel 20.

[0087] Thus, when the temperature of the LCOS panel 20 is below a critical temperature, the adjustment member 15A is connected between the first thermal conductive sheet 11 and the LCOS panel 20. The heat generated by the light source 10 passes through the first thermal conductive sheet 11 and the adjustment member 15A in sequence before being transferred to the LCOS panel 20, causing the temperature of the LCOS panel 20 to rise. When the temperature of the LCOS panel 20 rises to a critical temperature, the thermal expansion and contraction effects cause the adjustment member 15A to contract, disconnecting it from the first thermal conductive sheet 11 or the LCOS panel 20. Consequently, the heat from the light source 10 can no longer be transferred to the LCOS panel 20.

[0088] Example 4

[0089] like Figure 7 and Figure 8In the fourth embodiment, the second heat conducting plate 12 in the optical engine 200 of the second embodiment is omitted. The first end of the first heat conducting plate 11 is connected to the light source 10, and the second end is connected to the LCOS liquid crystal panel 20. One end of the adjustment member 15B (made of a thermally expandable and cold-contractable material) is fixed to the fixing member 17, and the other end of the adjustment member 15A is used to connect to the second end of the first heat conducting plate 11 or the LCOS liquid crystal panel 20. Preferably, the other end of the adjustment member 15A is used to connect to the second end of the first heat conducting plate 11.

[0090] In this way, when the temperature of the LCOS liquid crystal panel 20 is lower than the critical temperature, the first end of the first thermal conductive plate 11 is fixedly connected to the light source 10, and the second end is connected to the LCOS liquid crystal panel 20. The heat generated by the light source 10 is sequentially transferred to the LCOS liquid crystal panel 20 through the first thermal conductive plate 11, causing the temperature of the LCOS liquid crystal panel 20 to rise.

[0091] When the temperature of the LCOS panel 20 rises to a critical temperature, the thermal expansion and contraction effect causes the adjusting member 15B to expand. In this way, the adjusting member 15B pushes against the first thermal conductive plate 11, causing the second end of the first thermal conductive plate 11 to be disconnected from the LCOS panel 20. In this way, the heat from the light source 10 can no longer be transferred to the LCOS panel 20.

[0092] The optical machine of the present application effectively controls whether the heat generated by the light source 10 is conducted to the LCOS liquid crystal panel 20 through the coordinated arrangement of the first heat conducting plate 11, the second heat conducting plate 12 and the adjustment member 15A / 15B. Within an appropriate temperature range, the adjustment member 15A connects the first heat conducting plate 11 with the second heat conducting plate 12 to conduct the heat of the light source 10 to the LCOS liquid crystal panel 20; when the appropriate temperature range is exceeded, the adjustment member 15A disconnects the first heat conducting plate 11 with the second heat conducting plate 12 to prevent the heat of the light source 10 from being conducted to the liquid crystal module. Alternatively, the optical engine of the present application effectively controls whether the heat generated by the light source 10 is transferred to the LCOS panel 20 through the coordinated arrangement of the first heat conducting plate 11 and the adjustment member 15A / 15B. Within a suitable temperature range, the first heat conducting plate 11 is connected between the light source 10 and the LCOS panel 20 to transfer the heat from the light source 10 to the liquid crystal module. When the temperature exceeds the suitable temperature range, the adjustment member 15A disconnects the first heat conducting plate 11 from the LCOS panel 20, preventing the heat from the light source 10 from being transferred to the LCOS panel 20. In this way, the heat from the light source 10 is utilized to improve the LCOS response speed, dissipating heat from the light source 10 to increase its brightness while also increasing the temperature of the LCOS panel 20 to accelerate its response speed. This improves the overall brightness of the optical engine without color mixing, while also ensuring that the LCOS panel 20 does not overheat and fail, significantly enhancing the competitiveness of near-eye display optical engines based on LCOS non-luminous display chips.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. An optical machine, comprising an illumination module and an imaging module, wherein the illumination module comprises a light source and the imaging module comprises a liquid crystal panel, characterized in that: The optical machine further comprises: a first heat conducting plate, comprising a first end and a second end, wherein the first end of the first heat conducting plate is connected to the light source; a second heat conducting plate, comprising a first end and a second end, wherein the first end of the second heat conducting plate is connected to the liquid crystal panel; an adjusting member connected to at least one of the first heat conducting plate and the second heat conducting plate; The adjusting member is used to keep the first heat conducting plate connected to the second heat conducting plate when the temperature of the liquid crystal panel is lower than a critical temperature so that the heat generated by the light source is transferred to the liquid crystal panel; The adjusting member is further configured to disconnect the first heat conducting plate from the second heat conducting plate when the temperature of the liquid crystal panel reaches or exceeds a critical temperature.

2. The optical machine according to claim 1, wherein: The adjusting member is arranged between the first heat conducting plate and the second heat conducting plate, and the adjusting member is made of a heat conducting material that expands when cold and contracts when hot; One of the second end of the first heat conducting plate and the second end of the second heat conducting plate is fixedly connected to the adjusting member; When the temperature of the liquid crystal panel is lower than the critical temperature, the other of the second end of the first heat conducting plate and the second end of the second heat conducting plate maintains abutting contact with the adjusting member; When the temperature of the liquid crystal panel reaches or exceeds a critical temperature, the other of the second end of the first heat conducting plate and the second end of the second heat conducting plate is disconnected from the adjustment member.

3. The optical machine according to claim 1, wherein: The optical engine further includes a fixing member fixedly disposed in the optical engine, one end of the adjusting member is fixedly connected to the fixing member, and the other end of the adjusting member is used to connect to the first heat conducting plate or the second heat conducting plate, and the adjusting member is made of a heat conducting material that expands with heat and contracts with cold; When the temperature of the liquid crystal panel is higher than a critical value, the adjusting member pushes the first heat conducting plate or the second heat conducting plate to disconnect the first heat conducting plate from the second heat conducting plate.

4. The optical machine according to claim 3, wherein: The liquid crystal panel has a light emitting surface, the first heat conducting plate extends beyond the second heat conducting plate in a direction parallel to the light emitting surface, the adjusting member and the fixing member are arranged opposite to the area where the first heat conducting plate extends beyond the second heat conducting plate, the adjusting member is located between the fixing member and the first heat conducting plate, and the adjusting member is used to push the first heat conducting plate to disconnect the first heat conducting plate from the second heat conducting plate.

5. The optical machine according to claim 3, wherein: The light source has a light emitting surface, and the second heat conducting plate extends beyond the first heat conducting plate in a direction parallel to the light emitting surface. The adjusting member and the fixing member are arranged opposite to the area where the second heat conducting plate extends beyond the first heat conducting plate. The adjusting member is located between the fixing member and the second heat conducting plate, and the adjusting member is used to push the second heat conducting plate to disconnect the second heat conducting plate from the first heat conducting plate.

6. The optical machine according to claim 1, wherein: The light source has a light emitting side, and the first heat conducting sheet is connected to a surface of the light source facing away from the light emitting side; and / or The liquid crystal panel has a light emitting side, and the second heat conducting sheet is connected to a surface of the liquid crystal panel facing away from the light emitting side.

7. The optical machine according to claim 1, wherein: The light source is located beside the liquid crystal panel. The first heat conducting sheet is an L-shaped structure, a first end of the L-shaped structure is connected to the light source, and the other end of the L-shaped structure extends to the bottom of the liquid crystal panel; or The second heat conducting sheet is an L-shaped structure, a first end of the L-shaped structure is connected to the liquid crystal panel, and the other end of the L-shaped structure extends to the bottom of the light source.

8. An optical machine, comprising an illumination module and an imaging module, wherein the illumination module comprises a light source and the imaging module comprises a liquid crystal panel, characterized in that: The optical machine further comprises: a heat conducting sheet, comprising a first end and a second end, wherein the first end of the heat conducting sheet is connected to the light source, and the second end is used to connect to the liquid crystal panel; an adjusting member connected to at least one of the heat conducting sheet and the liquid crystal panel; The adjusting member is used to keep the heat conducting sheet connected to the liquid crystal panel when the temperature of the liquid crystal panel is lower than a critical temperature so that the heat generated by the light source is transferred to the liquid crystal panel; The regulating member is further configured to disconnect the heat conducting sheet from the liquid crystal panel when the temperature of the liquid crystal panel reaches or exceeds a critical temperature.

9. The optical machine according to claim 8, wherein: The adjusting member is disposed between the heat conducting sheet and the liquid crystal panel, the adjusting member is fixedly connected to the second end of the heat conducting sheet or the liquid crystal panel, and the adjusting member is made of a heat conducting material that expands when heated and contracts when cooled; When the temperature of the liquid crystal panel is lower than the critical temperature, the second end of the liquid crystal panel or the heat conducting sheet maintains abutting contact with the adjusting member; When the temperature of the liquid crystal panel reaches or exceeds a critical temperature, the liquid crystal panel or the second end of the heat conducting sheet is disconnected from the adjusting member.

10. The optical machine according to claim 8, wherein: The optical engine further includes a fixing member fixedly disposed in the optical engine, one end of the adjusting member is fixedly connected to the fixing member, and the other end of the adjusting member is connected to the heat conducting sheet, and the adjusting member is made of a heat conducting material that expands with heat and contracts with cold; When the temperature of the liquid crystal panel is higher than a critical value, the adjusting member pushes the heat conducting sheet to disconnect the heat conducting sheet from the liquid crystal panel.

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