Projector ray machine and projector

Abstract

The invention relates to the technical field of display equipment, and discloses a projector ray machine and a projector, and the projector ray machine comprises a housing which is provided with an inner cavity; the light source is located in the inner cavity of the shell; the display module is located on the light emitting side of the light source and comprises a liquid crystal display panel, the liquid crystal display panel comprises a first substrate and a second substrate which are arranged in a box-to-box mode, the first substrate is close to the light source, the second substrate is located on the side, away from the light source, of the first substrate, and the first substrate comprises a functional area and a heat dissipation area. The orthographic projection of the second substrate on the first substrate is located in the functional area, the functional area of the first substrate and the second substrate are located in the inner cavity of the shell, and the heat dissipation area of the first substrate extends to the outer side of the shell; the heat dissipation mechanism is arranged in the heat dissipation area of the first substrate, and the heat dissipation mechanism is used for achieving heat exchange between the interior of the liquid crystal display panel and the outer side of the shell. The projector ray machine can prevent the optical performance from being influenced by a high-temperature working environment, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display devices, in particular to a projector light machine and a projector. BACKGROUND

[0002] A liquid crystal display panel (LCD) is a core device of a single liquid crystal projector closed light machine. When the projector light machine is working, the light transmittance of the liquid crystal display panel and the upper and lower polarizing plates in the entire system light path is low, and most of the light energy is converted into heat energy. A large amount of heat is generated in the liquid crystal display panel module, and the temperature of the liquid crystal display panel rises. When the heat dissipation effect of the closed light machine is poor, the heat in the light machine cannot be dissipated, the temperature in the light machine rises, and the liquid crystal display panel is in a high-temperature working environment for a long time. Not only the optical performance of the liquid crystal display panel will be reduced, but also the service life will be sharply reduced. Malfunctions such as failure of the polarizing plate and failure of the liquid crystal display panel may occur.

[0003] A conventional closed light machine generally first removes the heat radiated from the surface of the liquid crystal display panel by air flow of a fan to balance the heat in the light machine, and then performs internal and external heat exchange through a metal heat dissipation device. Further ways to improve the heat dissipation effect of the liquid crystal display panel and reduce the screen temperature include: (1) removing the heat from the surface of the screen by increasing the fan speed; (2) separating the upper and lower polarizing plates from the liquid crystal display panel and attaching them to the glass to increase the heat dissipation area and improve the heat dissipation effect of the system; and (3) improving the internal and external heat exchange efficiency by optimizing the internal air duct and the structure of the external metal heat dissipation device.

[0004] However, the conventional ways have certain defects: (1) increasing the fan speed increases the fan noise, thereby increasing the noise of the entire product and reducing the user experience; (2) when the upper and lower polarizing plates are separately fixed after being separated from the liquid crystal display panel, the polarizing angle of the upper and lower polarizing plates deviates from 90° if the fixing precision is insufficient, and the contrast ratio of the liquid crystal display panel is significantly reduced, thereby reducing the product parameters; and (3) the optimization of the air duct and the metal heat dissipation device requires a large amount of time for verification, and the time cost is high. SUMMARY

[0005] The present application provides a projector light machine and a projector, which can avoid the influence of a high-temperature working environment on the optical performance and improve the service life.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A projector light machine comprises:

[0008] a housing having an inner cavity;

[0009] a light source located in the inner cavity of the housing;

[0010] A display module is located on the light exit side of the light source, and the display module comprises a liquid crystal display panel, the liquid crystal display panel comprises a first substrate and a second substrate arranged in a cell, the first substrate is adjacent to the light source, and the second substrate is located on the side of the first substrate away from the light source, the first substrate comprises a functional area and a heat dissipation area, the orthographic projection of the second substrate on the first substrate is located in the functional area, the functional area of the first substrate and the second substrate are located in the inner cavity of the shell, and the heat dissipation area of the first substrate extends to the outside of the shell.

[0011] At least one heat dissipation mechanism is arranged on the heat dissipation area of the first substrate, and the heat dissipation mechanism is used for heat exchange between the inside of the liquid crystal display panel and the outside of the shell.

[0012] Optionally, the heat dissipation area of the first substrate comprises a heat dissipation material layer located on the side of the first substrate facing the second substrate, and the heat dissipation mechanism is located on the side of the heat dissipation material layer facing the second substrate.

[0013] Optionally, the material of the heat dissipation material layer is a silicon nitride material.

[0014] Optionally, the functional area of the first substrate has the heat dissipation area on both sides, and each heat dissipation area has the heat dissipation mechanism.

[0015] Optionally, the heat dissipation mechanism comprises a first heat-conducting adhesive layer, and the heat dissipation mechanism is bonded to the first substrate through the first heat-conducting adhesive layer.

[0016] Optionally, the heat dissipation mechanism comprises a refrigeration sheet bonded to the heat dissipation area of the first substrate, and the refrigeration sheet is used for heat exchange with the first substrate to achieve heat dissipation of the liquid crystal display panel.

[0017] Optionally, the refrigeration sheet is a heat plate.

[0018] Optionally, the material of the refrigeration sheet is a semiconductor material, the refrigeration sheet has a first electrode and a second electrode, and the first electrode and the second electrode are used for connecting the positive electrode and the negative electrode of a direct current power supply respectively.

[0019] Optionally, the heat dissipation mechanism further comprises a metal heat sink located on the side of the refrigeration sheet away from the first substrate.

[0020] Optionally, the metal heat sink has a fin structure.

[0021] Optionally, the heat dissipation mechanism further comprises a second heat-conducting adhesive layer, and the metal heat sink and the refrigeration sheet are bonded through the second heat-conducting adhesive.

[0022] Optionally, a heat dissipation fan is further included, and the heat dissipation fan is located in the shell.

[0023] The shell has a heat dissipation air duct, and the heat dissipation air duct is located on a side of the first substrate away from the second substrate and / or on a side of the second substrate away from the first substrate.

[0024] The heat dissipation fan is used to accelerate heat exchange between air in the heat dissipation air duct and air outside the heat dissipation air duct.

[0025] Optionally, the display module further includes a first polaroid and a second polaroid.

[0026] The first polaroid is attached to a side of the first substrate away from the second substrate.

[0027] The second polaroid is attached to a side of the second substrate away from the first substrate, and a polarization direction of the second polaroid is perpendicular to a polarization direction of the first polaroid.

[0028] Optionally, the display module further includes a fixed frame and a bezel.

[0029] The functional area of the first substrate has a display area and a non-display area surrounding the display area.

[0030] The fixed frame is located on a side of the liquid crystal display panel close to the light source, and the fixed frame has a first light transmission port, and a normal projection of the first light transmission port on the first substrate coincides with the display area.

[0031] The bezel is located on a side of the liquid crystal display panel away from the light source, and the bezel has a second light transmission port and at least one avoiding port, a normal projection of the second light transmission port on the first substrate coincides with the display area, and the avoiding port is opposite to the heat dissipation area, and the bezel is buckled with the fixed frame to fix the liquid crystal display panel.

[0032] The display module is assembled on the shell through the bezel and the fixed frame.

[0033] The at least one heat dissipation mechanism corresponds to the at least one avoiding port one by one, and the heat dissipation mechanism is bonded to the first substrate through the avoiding port.

[0034] The application further provides a projector, which includes any one of the projectors provided in the above technical solutions.

[0035] This application provides a projector optical engine and a projector. The projector optical engine includes a housing, a light source, a display module, and at least one heat dissipation mechanism. The light source is located in the inner cavity of the housing, and the display module is located on the light-emitting side of the light source. The display module includes a liquid crystal display panel. The functional area of ​​a first substrate and a second substrate in the liquid crystal display panel are located in the inner cavity of the housing. The heat dissipation area of ​​the first substrate extends to the outside of the housing, and the heat dissipation mechanism is disposed in the heat dissipation area of ​​the first substrate, i.e., the heat dissipation mechanism is located on the outside of the housing. When the light emitted by the light source shines on the display module, due to the low transmittance of the display module, most of the light energy is converted into heat energy, and the internal temperature of the liquid crystal display panel rises. The heat dissipation mechanism located on the outside of the housing starts to work. Most of the heat inside the liquid crystal display panel can be directly conducted to the heat dissipation mechanism through the functional area of ​​the first substrate, realizing direct heat exchange between the inside of the liquid crystal display panel and the outside of the housing. It does not radiate to the inner cavity of the housing, which can effectively reduce the temperature of the inner cavity of the housing, reduce the heat dissipation pressure of the inner cavity of the housing, improve the heat dissipation efficiency of the projector optical engine, avoid the impact of high temperature working environment on the optical performance of the projector optical engine, and improve the service life of the projector optical engine. Attached Figure Description

[0036] Figure 1 This application provides a schematic diagram of the structure of a projector optical engine according to an embodiment of the present application.

[0037] Figure 2 This is a schematic diagram of the structure of a liquid crystal display panel provided in an embodiment of this application;

[0038] Figure 3 A plan view of a projector optical engine provided in an embodiment of this application;

[0039] Figure 4 A cross-sectional view of a projector optical engine provided in an embodiment of this application;

[0040] Figure 5 A schematic diagram of heat transfer in a projector optical engine provided in an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of a heat dissipation mechanism provided in an embodiment of this application;

[0042] Figure 7 A schematic diagram of heat transfer in a projector optical engine provided in an embodiment of this application;

[0043] Figure 8 An exploded view of a projector optical engine provided in an embodiment of this application;

[0044] Figure 9 An exploded view of a display module provided in an embodiment of this application;

[0045] Figure 10This is a schematic diagram of the structure of a display module provided in an embodiment of this application.

[0046] icon:

[0047] 1-Housing; 2-Display module; 21-Liquid crystal display panel; 211-First substrate; 212-Second substrate; 22-First polarizer; 23-Second polarizer; 24-Fixing frame; 241-First light-transmitting opening; 25-Frame; 251-Second light-transmitting opening; 252-Avoidance opening; 26-Flexible circuit board; 3-Heat dissipation mechanism; 31-First thermally conductive adhesive layer; 32-Cooling element; 33-Second thermally conductive adhesive layer; 34-Metal heat sink. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a projector optical engine provided in an embodiment of this application. The projector optical engine provided in this application includes:

[0050] Housing 1, housing 1 has an internal cavity;

[0051] The light source is located inside the cavity of housing 1;

[0052] Display module 2 is located on the light-emitting side of the light source. Display module 2 includes a liquid crystal display panel 21. The liquid crystal display panel 21 includes a first substrate 211 and a second substrate 212 disposed opposite each other. The first substrate 211 is adjacent to the light source, and the second substrate 212 is located on the side of the first substrate 211 facing away from the light source. The first substrate 211 includes a functional area A and a heat dissipation area B. The orthographic projection of the second substrate 212 onto the first substrate 211 is located in functional area A. Functional area A of the first substrate 211 and the second substrate 212 are located within the cavity of the housing 1. The heat dissipation area B of the first substrate 211 extends to the outside of the housing 1. Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a liquid crystal display panel 21 provided in an embodiment of this application;

[0053] At least one heat dissipation mechanism 3 is disposed in the heat dissipation area B of the first substrate 211. The heat dissipation mechanism 3 is used to realize heat exchange between the inside of the liquid crystal display panel 31 of the housing 1 and the outside of the housing 1, such as... Figure 3 As shown, Figure 3This is a schematic diagram of the planar structure of a projector optical engine provided in an embodiment of this application. Figure 3 The area inside the dashed line is the part inside shell 1, and the area outside the dashed line is the part outside shell 1.

[0054] The projector optical engine provided in this embodiment includes a housing 1, a light source, a display module 2, and at least one heat dissipation mechanism 3. The light source is located within the inner cavity of the housing 1, and the display module 2 is located on the light-emitting side of the light source. The display module 2 includes a liquid crystal display panel 21. The functional area A of the first substrate 211 and the second substrate 212 of the liquid crystal display panel 21 are located within the inner cavity of the housing 1. The heat dissipation area B of the first substrate 211 extends to the outside of the housing 1, and the heat dissipation mechanism 3 is disposed on the heat dissipation area B of the first substrate 211, i.e., the heat dissipation mechanism 3 is located on the outside of the housing 1. When the light emitted from the light source shines on the display module 2, due to the display... Module 2 has low transmittance, and most of the light energy is converted into heat energy, causing the internal temperature of the liquid crystal display panel 21 to rise. The heat dissipation mechanism 3 located on the outside of the housing 1 then starts to work. Most of the heat inside the liquid crystal display panel 21 can be directly conducted to the heat dissipation mechanism 3 through the functional area A of the first substrate 211, realizing direct heat exchange between the inside of the liquid crystal display panel 21 and the outside of the housing 1. It will not radiate to the inner cavity of the housing 1, effectively reducing the temperature of the inner cavity of the housing 1, reducing the heat dissipation pressure of the inner cavity of the housing 1, improving the heat dissipation efficiency of the projector optical engine, avoiding the impact of high temperature working environment on the optical performance of the projector optical engine, and improving the service life of the projector optical engine.

[0055] In this embodiment, the shell 1 can be made of plastic, which is easy to manufacture and saves costs, or it can be made of other materials, which are not limited here.

[0056] In this embodiment, the first substrate 211 can be an array substrate, the second substrate 212 can be a color filter substrate, and the liquid crystal display panel 21 further includes a liquid crystal layer and a frame. The liquid crystal layer and the frame are located between the array substrate and the color filter substrate. The orthographic projection of the liquid crystal layer on the first substrate 211 is located in functional area A, and the frame is used to limit the setting area of ​​the liquid crystal layer.

[0057] In this embodiment, the display module 2 may further include a first polarizer 22 and a second polarizer 23. The first polarizer 22 is attached to the side of the first substrate 211 facing away from the second substrate 212, and the second polarizer 23 is attached to the side of the second substrate 212 facing away from the first substrate 211. The polarization direction of the second polarizer 23 is perpendicular to the polarization direction of the first polarizer 22. Figure 4 As shown, Figure 4This is a schematic diagram of the structure of a projector optical engine provided in an embodiment of this application. The orthogonal projection of the first polarizer 22 onto the first substrate 211 can be located within functional area A. The heat dissipation mechanism 3 on the first substrate 211 enables rapid heat exchange between the interior of the liquid crystal display panel 21 and the exterior of the housing 1, accelerating heat dissipation within the housing cavity, reducing the temperature inside the housing 1, avoiding polarizer failure, and preventing the polarization angle between the first polarizer 22 and the second polarizer 23 from deviating by 90°, thus ensuring the display contrast of the display module 2.

[0058] In this embodiment, the heat dissipation area B of the first substrate 211 may have a heat dissipation material layer, which may be located on the side of the first substrate 211 facing the second substrate 212. The heat dissipation mechanism 3 is located on the side of the heat dissipation material layer facing the second substrate 212, such as... Figure 3 As shown. The heat dissipation mechanism 3 can be bonded to the heat dissipation material layer on the first substrate 211. The heat dissipation material layer can have good thermal conductivity and can quickly transfer the heat on the liquid crystal display panel 21 to the heat dissipation mechanism 3.

[0059] Specifically, the heat dissipation material layer can be made of silicon nitride (SiNx), which has good thermal conductivity. The heat dissipation material layer of the heat dissipation region B of the first substrate 211 can be fabricated in the same layer as the film layer of the functional region A of the first substrate 211. For example, the heat dissipation material layer of the heat dissipation region B can be fabricated in the same layer as the passivation layer of the functional region A, which can simplify the manufacturing process and save manufacturing costs.

[0060] In the embodiments of this application, such as Figure 3 As shown, the functional area A of the first substrate 211 can have heat dissipation areas B on both sides. Each heat dissipation area B can have a heat dissipation mechanism 3, which can achieve uniform heat dissipation on both sides of the functional area A and increase the area of ​​the heat dissipation area B to accelerate the heat dissipation speed of the liquid crystal display panel 21.

[0061] like Figure 5 As shown, Figure 5 This is a schematic diagram of heat transfer in a projector optical engine provided in an embodiment of this application. Figure 5 The direction of the middle arrow indicates the direction of heat transfer. Both sides of the first substrate 211 of the liquid crystal display substrate have heat dissipation mechanisms 3. The heat of the part of the liquid crystal display panel 21 located inside the housing 1 is transferred to both sides of the liquid crystal display panel 21. The heat dissipation mechanism 3 on the outside of the housing 1 can directly dissipate the heat inside the liquid crystal display panel 21, which can accelerate the heat dissipation speed and improve the heat dissipation efficiency.

[0062] Optionally, the location of the heat dissipation area B on the first substrate 211 can also be other locations, which are not limited here and can be determined according to the actual situation.

[0063] In this embodiment, the heat dissipation mechanism 3 may include a first thermally conductive adhesive layer 31. The heat dissipation mechanism 3 can be bonded to the first substrate 211 through the first thermally conductive adhesive layer 31, which can accelerate the transfer of heat from the first substrate 211 to the heat dissipation mechanism 3. Figure 4 and Figure 6 As shown, Figure 6 This is a schematic diagram of a heat dissipation mechanism 3 provided in an embodiment of this application.

[0064] In this embodiment, the heat dissipation mechanism 3 may include a cooling chip 32 bonded to the heat dissipation area B of the first substrate 211, such as... Figure 4 and Figure 6 As shown, the cooling element 32 can be used to form a heat exchange with the first substrate 211 to dissipate heat from the liquid crystal display panel 21. The cooling element 32 can be used for cooling, and the heat exchange between the cooling element 32 and the first substrate 211 can accelerate the heat dissipation speed of the liquid crystal display panel 21 and improve the heat dissipation efficiency of the projector's optical engine.

[0065] Specifically, the cooling element 32 can be a vapor chamber. The vapor chamber is a vacuum cavity with a microstructured inner wall, typically made of copper. When heat is conducted from the first substrate 211 to the vapor chamber, the coolant in the cavity, heated in a low-vacuum environment, begins to vaporize. It absorbs heat and expands rapidly, quickly filling the cavity with the gaseous cooling medium. When the gaseous medium comes into contact with a cooler area, condensation occurs. This condensation releases the heat accumulated during evaporation. The condensed coolant then returns to the evaporation heat source through capillary channels in the microstructure. This process repeats continuously within the cavity, enabling rapid heat dissipation from the liquid crystal display panel 21.

[0066] Specifically, the material of the cooling chip 32 can be a semiconductor material, and the cooling chip 32 has a first electrode and a second electrode, which are used to connect to the positive and negative terminals of a DC power supply, respectively.

[0067] The refrigeration element 32 can be a semiconductor material refrigeration element (TEC) 32, which is made using the Peltier effect of semiconductor materials. The Peltier effect refers to the phenomenon where, when a direct current passes through a thermocouple composed of two semiconductor materials, one end absorbs heat and the other end releases heat. Heavily doped N-type and P-type bismuth telluride is mainly used as the semiconductor material in the TEC. The bismuth telluride elements are connected in series and generate heat in parallel. The TEC includes several P-type and N-type pairs (groups) connected together by electrodes and sandwiched between two ceramic electrodes. When current flows through the TEC, the heat generated by the current is transferred from one side of the TEC to the other, creating a "hot" side and a "cold" side on the TEC. This is the principle of heating and cooling.

[0068] In this embodiment, when the first and second electrodes of the thermoelectric cooler 32 are connected to a direct current, a temperature difference is generated between the side of the thermoelectric cooler 32 adjacent to the first substrate 211 and the side away from the first substrate 211. This enables heat exchange between the first substrate 211 and the cooler 32, accelerating the heat dissipation of the liquid crystal display panel 21. When the heat dissipation mechanism 3 uses the thermoelectric cooler 32 (TEC), it can quickly remove the heat inside the liquid crystal display panel 21 and the heat generated by the TEC's own power, enhancing the heat dissipation effect of the projector's optical engine.

[0069] In the embodiments of this application, such as Figure 4 and Figure 6 As shown, the heat dissipation mechanism 3 may also include a metal heat sink 34, which is located on the side of the cooling chip 32 away from the first substrate 211. The metal heat sink 34 can accelerate the heat dissipation speed of the side of the cooling chip 32 away from the first substrate 211, thereby improving the overall heat dissipation efficiency of the optical engine.

[0070] Specifically, the material of the metal radiator 34 can be aluminum alloy or copper, or other metal materials. There are no restrictions here, and it depends on the actual situation.

[0071] Specifically, such as Figure 4 and Figure 6 As shown, the metal radiator 34 can have a finned structure, which can increase the heat dissipation area, improve the heat dissipation speed of the heat dissipation mechanism 3, and reduce the heat dissipation pressure inside the housing 1.

[0072] In the embodiments of this application, such as Figure 4 and Figure 6 As shown, the heat dissipation mechanism 3 also includes a second thermally conductive adhesive layer 33. The metal heat sink 34 and the cooling chip 32 can be bonded together by the second thermally conductive adhesive. The heat on the cooling chip 32 can be quickly transferred to the metal heat sink 34 through the second thermally conductive adhesive layer 33, thereby improving the heat dissipation speed of the heat dissipation mechanism 3, thereby reducing the heat dissipation pressure inside the housing 1, improving the heat dissipation rate, avoiding the impact of high temperature working environment on optical performance, and improving the service life of the optical engine.

[0073] Specifically, such as Figure 7 As shown, Figure 7 This is a schematic diagram of heat transfer in a projector optical engine provided in an embodiment of this application. Figure 7 As shown in the image, the heat inside the liquid crystal display panel 21 is transferred to the cooling element 32 in the heat dissipation mechanism 3. Figure 7 The middle arrow E points in the direction of heat transfer. The heat on the heat dissipation mechanism 3 is transferred to the outside air. Figure 7(The direction of the middle arrow F indicates the direction of the outside air flow) Heat exchange can be carried out to quickly remove heat from the shell 1, thereby improving the heat dissipation efficiency of the projector's optical engine.

[0074] In this embodiment of the application, the projector optical engine may further include a cooling fan located inside the housing 1; the housing 1 has a heat dissipation duct located on the side of the first substrate 211 away from the second substrate 212 and / or on the side of the second substrate 212 away from the first substrate 211; the cooling fan is used to accelerate the heat exchange between the air inside the heat dissipation duct and the air outside the heat dissipation duct.

[0075] Specifically, a heat dissipation duct is provided on one or both sides of the LCD module 2. The cooling fan works in conjunction with the cooling duct to blow the heat from the surface of the LCD panel 21 into the inner cavity of the housing 1. Then, the heat from the inner cavity of the housing 1 is dissipated to the outside of the housing 1, thus assisting in the heat dissipation of the LCD panel 21. In this structure, the cooling fan and cooling duct only play an auxiliary role in heat dissipation. The fan speed does not need to be increased, or it can be decreased, thereby reducing fan noise and improving the user experience.

[0076] like Figure 7 As shown, the housing 1 may have air ducts L1 and L2. Under the action of the cooling fan, the surface of the liquid crystal display panel 21 can come into contact with the air in the inner cavity of the housing 1. Figure 7 (The direction of the middle arrow H indicates the airflow direction) heat exchange occurs, and the heat from the surface of the liquid crystal display panel 21 is dissipated into the inner cavity of the housing 1. Additionally, the heat inside the housing 1 can also be dissipated through the housing 1 itself. Figure 7 The middle arrow G points in the direction of heat transfer on the shell.

[0077] Optionally, a cooling fan may not be installed inside the housing 1 to avoid fan noise. This is not a restriction and can be determined based on the actual situation.

[0078] In this embodiment, the display module 2 may further include a fixing frame 24 and a frame 25; wherein, the functional area A of the first substrate 211 has a display area and a non-display area surrounding the display area; the fixing frame 24 is located on the side of the liquid crystal display panel 21 near the light source, and the fixing frame 24 has a first light-transmitting opening 241, the orthographic projection of the first light-transmitting opening 241 on the first substrate 211 coincides with the display area; the frame 25 is located on the side of the liquid crystal display panel 21 away from the light source, and the frame 25 has a second light-transmitting opening 251 and at least one clearance opening 252, the orthographic projection of the second light-transmitting opening 251 on the first substrate 211 coincides with the display area, and the clearance opening 252 is opposite to the heat dissipation area B; the frame 25 and the fixing frame 24 are engaged to fix the liquid crystal display panel 21; the display module 2 is assembled onto the housing 1 through the frame 25 and the fixing frame 24; at least one heat dissipation mechanism 3 corresponds one-to-one with at least one clearance opening 252, and the heat dissipation mechanism 3 is bonded to the first substrate 211 through the clearance opening 252, such as Figure 8 and Figure 9 As shown, Figure 8 An exploded view of a projector optical engine provided in an embodiment of this application. Figure 9 An exploded view of a display module 2 provided in an embodiment of this application.

[0079] Specifically, the aforementioned fixing frame 24 and frame 25 can fix the position of the liquid crystal display panel 21 by fastening them together, thereby protecting the liquid crystal display panel 21 and improving the service life of the projector's optical engine.

[0080] Specifically, the fixed frame 24 and the border 25 can be made of metal or plastic, which is easy to manufacture and saves costs. Alternatively, the fixed frame 24 and the border 25 can be made of other materials, which are not limited here. For example, the fixed frame 24 can be made of plastic and the border 25 can be made of metal.

[0081] Specifically, such as Figure 8 and Figure 1 As shown, the housing 1 may have an opening corresponding to the display module 2. A portion of the display module 2 extends out of the housing 1 through the opening, so that the heat dissipation area B of the first substrate 211 extends out of the housing 1, thereby assembling the heat dissipation mechanism 3 with the display module 2.

[0082] In this embodiment, the functional area A of the first substrate 211 has a display area and a non-display area surrounding the display area. The non-display area may have heat dissipation areas B on both sides along the first direction. The non-display area located on one side of the display area along the second direction may be a bonding area. The first direction is perpendicular to the second direction. The bonding area may have connection terminals. The display module 2 also includes a flexible circuit board 26, which can be bonded to the bonding terminals on the first substrate 211. Figure 2As shown. The projector optical engine may also include a main control circuit board, which can be connected to the flexible circuit board 26 to drive the display module 2 for display.

[0083] In this embodiment, the assembly process of the projector optical engine can be as follows: First, the liquid crystal display panel 21 is placed on the fixing frame 24; then, the frame 25 is fitted with the fixing frame 24 to fix the liquid crystal display panel 21, assembling it into the display module 2, as shown below. Figure 10 As shown; then, the display module 2 is assembled onto the housing; then, the heat dissipation mechanism 3 is bonded to the heat dissipation area of ​​the first substrate of the liquid crystal display panel 21 through the clearance on the frame 25.

[0084] In this embodiment, the projector optical engine may specifically include a light source, a focusing element, a display module, an optical lens, a reflector, and a lens assembly. The light source, focusing element, display module, optical lens, and reflector may be located inside the housing, and the lens assembly is assembled on the housing, with the inner cavity of the housing forming a sealed space. The light source is located on the light-incident side of the display module and is used to provide incident light to the display module. The focusing element can convert the light emitted by the light source into collimated light rays and converge them to the light-incident side of the display module. The display module can display the target display image, the optical lens is used to optimize the display effect, the reflector can reflect the light emitted by the optical lens onto the lens assembly, and the lens assembly can project the target display image out of the projection device.

[0085] This application also provides a projector, including any of the projector optical engines provided in the above technical solutions.

[0086] In the projector provided in this application embodiment, the projector optical engine includes a housing 1, a light source, a display module 2, and at least one heat dissipation mechanism 3. The light source is located within the inner cavity of the housing 1, and the display module 2 is located on the light-emitting side of the light source. The display module 2 includes a liquid crystal display panel 21. The functional area A of the first substrate 211 and the second substrate 212 in the liquid crystal display panel 21 are located within the inner cavity of the housing 1. The heat dissipation area B of the first substrate 211 extends to the outside of the housing 1, and the heat dissipation mechanism 3 is disposed on the heat dissipation area B of the first substrate 211, i.e., the heat dissipation mechanism 3 is located on the outside of the housing 1. When the light emitted from the light source illuminates the display module 2... When the display module 2 has low transmittance, most of the light energy is converted into heat energy, and the temperature on the liquid crystal display panel 21 rises. The heat dissipation mechanism 3 located on the outside of the housing 1 starts to work. Most of the heat inside the liquid crystal display panel 21 can be conducted to the heat dissipation mechanism 3 through the functional area A of the first substrate 211. In this way, the heat dissipation mechanism 3 can carry away the heat inside the housing 1, realize the heat exchange between the inner cavity of the housing 1 and the outer cavity of the housing 1, reduce the temperature of the inner cavity of the housing 1, reduce the heat dissipation pressure of the inner cavity of the housing 1, improve the heat dissipation efficiency of the optical engine, avoid the high temperature working environment from affecting the optical performance of the projector optical engine, and improve the service life of the projector optical engine.

[0087] Specifically, the projector may also include a housing, and the projector optical engine may be located inside the housing.

[0088] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A projector light engine, wherein, The application relates to a display module. The display module comprises a shell, a light source, a display module, at least one heat-dissipating mechanism, a first polarizer and a second polarizer. The shell has an inner cavity. The light source is located in the inner cavity of the shell. The display module is located on the light-emitting side of the light source.

2. The projector light engine of claim 1, wherein, The display module comprises a liquid crystal display panel, which comprises a first substrate and a second substrate arranged in a cell.

3. The projector light engine of claim 2, wherein, The first substrate is adjacent to the light source.

4. The projector light engine of any of claims 1 to 3, wherein, The second substrate is located on the side of the first substrate away from the light source.

5. The projector light engine of any one of claims 1 to 4, wherein, The first substrate comprises a functional area and a heat-dissipating area.

6. The projector light engine of any one of claims 1 to 5, wherein, The orthographic projection of the second substrate on the first substrate is located in the functional area.

7. The projector light engine of claim 6, wherein, The functional area of the first substrate and the second substrate are located in the inner cavity of the shell.

8. The projector light engine of claim 6, wherein, The heat-dissipating area of the first substrate extends to the outside of the shell.

9. The projector light engine of any of claims 6 to 8, wherein, The heat-dissipating mechanism is arranged on the heat-dissipating area of the first substrate.

10. The projector light engine of claim 9, wherein, The heat-dissipating mechanism is used for heat exchange between the inside of the liquid crystal display panel and the outside of the shell.

11. The projector light engine of claim 9 or 10, wherein, The heat-dissipating area of the first substrate comprises a heat-dissipating material layer.

12. The projector light engine of any of claims 1-11, wherein, The heat-dissipating material layer is located on the side of the first substrate facing the second substrate. The heat-dissipating mechanism is located on the side of the heat-dissipating material layer facing the second substrate. The material of the heat-dissipating material layer is silicon nitride material.

13. The projector light engine of any of claims 1-12, wherein, Both sides of the functional area of the first substrate have the heat-dissipating area. Each heat-dissipating area has the heat-dissipating mechanism. The heat-dissipating mechanism comprises a first heat-conducting adhesive layer.

14. The projector light engine according to any one of claims 1-13, wherein, The heat-dissipating mechanism is bonded to the first substrate through the first heat-conducting adhesive layer. The heat-dissipating mechanism comprises a refrigeration sheet bonded to the heat-dissipating area of the first substrate. The refrigeration sheet is used for heat exchange with the first substrate to realize heat dissipation of the liquid crystal display panel. The refrigeration sheet is a uniform heating plate. The material of the refrigeration sheet is semiconductor material. The refrigeration sheet has a first electrode and a second electrode. The first electrode and the second electrode are used for connecting the positive electrode and the negative electrode of a direct-current power supply respectively. The heat-dissipating mechanism further comprises a metal heat sink. The metal heat sink is located on the side of the refrigeration sheet away from the first substrate. The metal heat sink has a fin structure. The heat-dissipating mechanism further comprises a second heat-conducting adhesive layer. The metal heat sink and the refrigeration sheet are bonded through the second heat-conducting adhesive layer. The display module further comprises a heat-dissipating fan. The shell has a heat-dissipating air duct. The heat-dissipating air duct is located on the side of the first substrate away from the second substrate and / or on the side of the second substrate away from the first substrate. The heat-dissipating fan is used for accelerating heat exchange between the air in the heat-dissipating air duct and the air outside the heat-dissipating air duct. The display module further comprises a first polarizer and a second polarizer. The first polarizer is attached to the side of the first substrate away from the second substrate. The second polarizer is attached to the side of the second substrate away from the first substrate. The second polarizer is perpendicular to the polarizing direction of the first polarizer. The display module further comprises a fixed frame and a frame. The functional area of the first substrate has a display area and a non-display area arranged around the display area. The fixed frame is located on the side of the liquid crystal display panel close to the light source, and has a first light-transmitting port, a projection of the first light-transmitting port on the first substrate coincides with the display area; The frame is located on the side of the liquid crystal display panel away from the light source, and has a second light-transmitting port and at least one avoiding port, a projection of the second light-transmitting port on the first substrate coincides with the display area, the avoiding port is opposite to the heat dissipation area, and the frame is buckled with the fixed frame to fix the liquid crystal display panel; The display module is assembled on the shell through the frame and the fixed frame; The at least one heat dissipation mechanism corresponds to the at least one avoiding port one by one, and the heat dissipation mechanism is bonded with the first substrate through the avoiding port.

15. A projector, wherein, A projector light machine comprising any one of claims 1-14.

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