Projector ray machine and projector

Abstract

The utility model 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, and in particular to a projector optical machine and a projector. Background Art

[0002] The liquid crystal display panel (LCD) is the core component of the sealed optical machine of a single liquid crystal projector. When the projector optical machine is working, the light transmittance of the liquid crystal display panel and the upper and lower polarizers in the entire system optical path is low, and most of the light energy is converted into heat energy. The LCD panel module will generate a lot of heat, and the temperature of the LCD panel will rise. When the heat dissipation effect of the sealed optical machine is not good, the heat inside the optical machine cannot be dissipated, the temperature inside the optical machine rises, and the LCD panel is in a high-temperature working environment for a long time. Not only will its own optical performance be reduced, but its life will also drop sharply, and the polarizer will fail, the LCD panel function will fail, and other defects will occur.

[0003] Conventional sealed optical machines generally use fan airflow to remove the heat radiated from the surface of the LCD panel to balance the heat inside the optical machine, and then use metal heat dissipation devices to perform internal and external heat exchange. To further improve the heat dissipation effect of the LCD panel and reduce the screen temperature, the following methods can be used: (1) Increase the wind speed of the built-in fan to remove the heat from the screen surface; (2) Separate the upper and lower polarizers from the LCD panel and attach them to the glass to increase the heat dissipation area and improve the heat dissipation effect of the system; (3) Improve 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 method has certain defects: (1) Increasing the fan speed will increase the fan noise, thereby increasing the noise of the entire product and worsening the user experience; (2) The upper and lower polarizers are separated from the LCD panel and fixed separately. When the fixing accuracy is insufficient, the polarization angles of the upper and lower polarizers will deviate from 90°, the contrast of the LCD panel will drop significantly, and the product parameters will be reduced; (3) Air duct optimization and metal heat dissipation device optimization require a lot of time to verify, and the time cost is too high. Utility Model Content

[0005] The present application provides a projector optical machine and a projector, wherein the projector optical machine can avoid the influence of optical performance due to a high temperature working environment and increase the service life.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A projector optical machine, comprising:

[0008] a housing having an inner cavity;

[0009] A light source, the light source being located in the inner cavity of the shell;

[0010] A display module, the display module is located at the light emitting side of the light source, the display module includes a liquid crystal display panel, the liquid crystal display panel includes a first substrate and a second substrate arranged in a box, the first substrate is adjacent to the light source, the second substrate is located on a side of the first substrate away from the light source, the first substrate includes 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 disposed in a heat dissipation area of ​​the first substrate, and is used to achieve heat exchange between the interior of the liquid crystal display panel and the exterior of the housing.

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

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

[0014] Optionally, both sides of the functional area of ​​the first substrate are provided with the heat dissipation area, and each heat dissipation area is provided with the heat dissipation mechanism.

[0015] Optionally, the heat dissipation mechanism includes a first thermally conductive adhesive layer, and the heat dissipation mechanism is bonded to the first substrate via the first thermally conductive adhesive layer.

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

[0017] Optionally, the cooling plate is a heat spreader.

[0018] Optionally, the cooling plate is made of semiconductor material, and has a first electrode and a second electrode, and the first electrode and the second electrode are used to connect to a positive electrode and a negative electrode of a DC power supply respectively.

[0019] Optionally, the heat dissipation mechanism further includes a metal heat sink, and the metal heat sink is located on a side of the cooling fin away from the first substrate.

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

[0021] Optionally, the heat dissipation mechanism further includes a second thermally conductive adhesive layer, and the metal heat sink and the cooling fin are bonded to each other via the second thermally conductive adhesive.

[0022] Optionally, a cooling fan is further included, and the cooling fan is located inside the housing;

[0023] A cooling air duct is provided inside the housing, and the cooling air duct is located on the side of the first substrate facing away from the second substrate and / or on the side of the second substrate facing away from the first substrate;

[0024] The cooling fan is configured to accelerate the heat exchange between the air inside the cooling air duct and the air outside the cooling air duct.

[0025] Optionally, the display module further includes a first polarizer and a second polarizer;

[0026] The first polarizer is attached to the side of the first substrate facing away from the second substrate;

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

[0028] Optionally, the display module further includes a fixing frame and a border;

[0029] The functional area of the first substrate has a display area and a non-display area disposed around the display area;

[0030] The fixing frame is located on the side of the liquid crystal display panel close to the light source, and the fixing frame has a first light-transmitting opening, and the orthographic projection of the first light-transmitting opening on the first substrate coincides with the display area;

[0031] The border is located on the side of the liquid crystal display panel facing away from the light source, and the border has a second light-transmitting opening and at least one avoiding opening. The orthographic projection of the second light-transmitting opening on the first substrate coincides with the display area. The avoiding opening is opposite to the heat dissipation area. The border and the fixing frame are cooperatively buckled to fix the liquid crystal display panel;

[0032] The display module is assembled on the housing through the border and the fixing frame;

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

[0034] The present application further provides a projector, including any one of the projector optical engines provided in the above technical solutions.

[0035] The present 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. Among them, the light source is located in the inner cavity of the housing, 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 the first substrate and the second substrate in the liquid crystal display panel are located in the inner cavity of the housing, and the heat dissipation area of the first substrate extends to the outside of the housing. The heat dissipation mechanism is arranged in the heat dissipation area of the first substrate, that is, the heat dissipation mechanism is located outside the housing. When the light emitted by the light source irradiates the display module, due to the low transmittance of the display module, most of the light energy is converted into heat energy, the internal temperature of the liquid crystal display panel rises, and the heat dissipation mechanism located outside the housing starts to work. Most of the heat inside the liquid crystal display panel can be directly led out 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, without radiating into the inner cavity of the housing, effectively reducing the temperature of the inner cavity of the housing, reducing the heat dissipation pressure of the inner cavity of the housing, improving the heat dissipation efficiency of the projector optical engine, being able to avoid affecting the optical performance of the projector optical engine due to a high-temperature working environment, and improving the service life of the projector optical engine. Description of the Drawings

[0036] Figure 1 Schematic structural diagram of a projector optical engine provided by an embodiment of the present application;

[0037] Figure 2 Schematic structural diagram of a liquid crystal display panel provided by an embodiment of the present application;

[0038] Figure 3 Schematic plan view of a projector optical engine provided by an embodiment of the present application;

[0039] Figure 4 Cross-sectional view of a projector optical engine provided by an embodiment of the present application;

[0040] Figure 5 Schematic heat transfer diagram of a projector optical engine provided by an embodiment of the present application;

[0041] Figure 6 Schematic structural diagram of a heat dissipation mechanism provided by an embodiment of the present application;

[0042] Figure 7 Schematic heat transfer diagram of a projector optical engine provided by an embodiment of the present application;

[0043] Figure 8 Exploded view of a projector optical engine provided by an embodiment of the present application;

[0044] Figure 9 Exploded view of a display module provided by an embodiment of the present application;

[0045] Figure 10A schematic diagram of the structure of a display module provided in an embodiment of the present 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 thermal conductive adhesive layer; 32-refrigeration sheet; 33-second thermal conductive adhesive layer; 34-metal radiator. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 machine provided in an embodiment of the present application. The embodiment of the present application provides a projector optical machine, including:

[0050] A housing 1 having an inner cavity;

[0051] A light source, the light source is located in the inner cavity of the housing 1;

[0052] The display module 2 is located at the light emitting side of the light source. The 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 arranged in a box. 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 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 on the first substrate 211 is located in the functional area A. The functional area A of the first substrate 211 and the second substrate 212 are located in the inner cavity of the housing 1. The heat dissipation area B of the first substrate 211 extends out of the housing 1, as shown in FIG. Figure 2 As shown, Figure 2 A schematic diagram of the structure of a liquid crystal display panel 21 provided in an embodiment of the present application;

[0053] At least one heat dissipation mechanism 3 is disposed in the heat dissipation area B of the first substrate 211, and 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 3Schematic diagram of the planar structure of a projector optical engine provided by an embodiment of the present application Figure 3 The area inside the dashed line in the figure is the part inside the housing 1, and the area outside the dashed line is the part outside the housing 1.

[0054] In the projector optical engine provided by the embodiment of the present application, it includes a housing 1, a light source, a display module 2, and at least one heat dissipation mechanism 3. Among them, the light source is located in the inner cavity of the housing 1, 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 in the inner cavity of the housing 1, and 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 arranged in the heat dissipation area B of the first substrate 211, that is, the heat dissipation mechanism 3 is located outside the housing 1; when the light emitted by the light source irradiates on the display module 2, due to the low transmittance of the display module 2, most of the light energy is converted into heat energy, the internal temperature of the liquid crystal display panel 21 rises, and the heat dissipation mechanism 3 located outside the housing 1 starts to work. Most of the heat inside the liquid crystal display panel 21 can be directly exported 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, without radiating to the inner cavity of the housing 1, which can effectively 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 projector optical engine, avoid affecting the optical performance of the projector optical engine due to the high-temperature working environment, and improve the service life of the projector optical engine.

[0055] In the embodiment of the present application, the material of the housing 1 can be a plastic material, which is easy to manufacture and saves costs, or it can be other materials, which are not limited here.

[0056] In the embodiment of the present application, the first substrate 211 can be an array substrate, the second substrate 212 can be a color filter substrate, the liquid crystal display panel 21 further includes a liquid crystal layer and a rubber frame, the liquid crystal layer and the rubber 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 the functional area A, and the rubber frame is used to limit the setting area of the liquid crystal layer.

[0057] In the embodiment of the present application, 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, as Figure 4 shown Figure 4A schematic structural diagram of a projector optical engine provided by an embodiment of the present application. Among them, the orthographic projection of the first polarizing plate 22 on the first substrate 211 may be located within the functional area A. Through the heat dissipation mechanism 3 on the first substrate 211, rapid heat exchange can be achieved between the inside of the liquid crystal display panel 21 and the outside of the housing 1, which can accelerate the heat dissipation speed of the inner cavity of the housing, reduce the temperature of the inner cavity of the housing 1, and can avoid the problem of polarizing plate failure and the problem that the polarization angle between the first polarizing plate 22 and the second polarizing plate 23 deviates from 90°, and can ensure the display contrast of the display module 2.

[0058] In an embodiment of the present application, the heat dissipation area B of the first substrate 211 may have a heat dissipation material layer. The heat dissipation material layer may be located on the side of the first substrate 211 facing the second substrate 212, and the heat dissipation mechanism 3 is located on the side of the heat dissipation material layer facing the second substrate 212, as Figure 3 shown. The heat dissipation mechanism 3 may be bonded to the heat dissipation material layer on the first substrate 211. The heat dissipation material layer may 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 material of the heat dissipation material layer may be silicon nitride material (SiNx), which has good thermal conductivity. The heat dissipation material layer in the heat dissipation area B of the first substrate 211 may be prepared on the same layer as the film layer in the functional area A of the first substrate 211. For example, the heat dissipation material layer in the heat dissipation area B is prepared on the same layer as the passivation layer in the functional area A, which can simplify the manufacturing process and save manufacturing costs.

[0060] In an embodiment of the present application, as Figure 3 shown, both sides of the functional area A of the first substrate 211 may have a heat dissipation area B. Each heat dissipation area B may 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] As Figure 5 shown, Figure 5 A schematic diagram of heat transfer of a projector optical engine provided by an embodiment of the present application. Figure 5 The direction of the arrow in it is the direction of heat transfer. Heat dissipation mechanisms 3 are provided on both sides of the first substrate 211 of the liquid crystal display substrate. 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 outside 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 position of the heat dissipation area B on the first substrate 211 may also be other positions, which are not limited here and are determined according to the actual situation.

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

[0064] In the embodiment of the present application, the heat dissipation mechanism 3 may include a thermoelectric cooler 32 bonded to the heat dissipation area B of the first substrate 211. As shown in Figure 4 and Figure 6 shown, the thermoelectric cooler 32 can be used to form a heat exchange with the first substrate 211 to achieve heat dissipation of the liquid crystal display panel 21. The thermoelectric cooler 32 can be used for refrigeration. The thermoelectric cooler 32 exchanges heat with the first substrate 211, which can accelerate the heat dissipation speed of the liquid crystal display panel 21 and improve the heat dissipation efficiency of the projector optical engine.

[0065] Specifically, the thermoelectric cooler 32 can be a heat pipe. Among them, a heat pipe is a vacuum cavity with a micro-structure on the inner wall, usually made of copper. When heat is conducted from the first substrate 211 to the heat pipe, the coolant in the cavity starts to vaporize after being heated in a low vacuum environment. At this time, it absorbs heat energy and expands rapidly in volume. The gaseous cooling medium quickly fills the entire cavity. When the gaseous medium contacts a relatively cold area, condensation will occur. The heat accumulated during evaporation is released by the condensation phenomenon. The condensed coolant will return to the evaporation heat source through the capillary pipes of the micro-structure, and this operation will be carried out repeatedly in the cavity, which can achieve rapid heat dissipation of the liquid crystal display panel 21.

[0066] Specifically, the material of the thermoelectric cooler 32 can be a semiconductor material. The thermoelectric cooler 32 has a first electrode and a second electrode, and the first electrode and the second electrode are used to connect to the positive and negative electrodes of a DC power supply respectively.

[0067] Among them, the thermoelectric cooler 32 can be a thermoelectric cooler (TEC) 32 made of semiconductor material. The thermoelectric cooler (TEC) 32 made of semiconductor material is made using the Peltier effect of semiconductor material. The so-called Peltier effect refers to the phenomenon that when a direct current passes through an electric couple composed of two semiconductor materials, one end absorbs heat and the other end releases heat. Heavily doped N-type and P-type bismuth telluride are mainly used as the semiconductor materials of TEC. The bismuth telluride elements are connected in series electrically and generate heat in parallel. TEC includes some P-type and N-type pairs (groups), which are connected together through electrodes and sandwiched between two ceramic electrodes; when current flows through the TEC, the heat generated by the current in the TEC will be transferred from one side of the TEC to the other side, generating a "hot" side and a "cold" side on the TEC, which is the heating and refrigeration principle.

[0068] In the embodiment of the present application, when a direct current is applied between the first electrode and the second electrode of the semiconductor material cooler 32, a phenomenon of hot and cold temperature difference occurs between the side of the semiconductor material cooler 32 close to the first substrate 211 and the side away from the first substrate 211, enabling heat exchange between the first substrate 211 and the cooler 32 and accelerating the heat dissipation rate of the liquid crystal display panel 21. When the heat dissipation mechanism 3 uses a semiconductor material cooler 32 (TEC), the heat dissipation mechanism 3 can quickly remove the heat inside the liquid crystal display panel 21 and the heat generated by the power of the TEC itself, enhancing the heat dissipation effect of the projector optical engine.

[0069] In the embodiment of the present application, as Figure 4 and Figure 6 shown, the heat dissipation mechanism 3 may further include a metal radiator 34. The metal radiator 34 is located on the side of the cooler 32 away from the first substrate 211. By means of the metal radiator 34, the heat dissipation rate on the side of the cooler 32 away from the first substrate 211 can be accelerated, and the overall heat dissipation efficiency of the optical engine can be improved.

[0070] Specifically, the material of the metal radiator 34 may be aluminum alloy or copper, etc., or other metal materials, which is not limited here and depends on the actual situation.

[0071] Specifically, as Figure 4 and Figure 6 shown, the metal radiator 34 may be in a fin structure, which can increase the heat dissipation area, improve the heat dissipation rate of the heat dissipation mechanism 3, and reduce the heat dissipation pressure in the inner cavity of the housing 1.

[0072] In the embodiment of the present application, as Figure 4 and Figure 6 shown, the heat dissipation mechanism 3 further includes a second thermal conductive adhesive layer 33. The metal radiator 34 and the cooler 32 can be bonded by the second thermal conductive adhesive. Through the second thermal conductive adhesive layer 33, the heat on the cooler 32 can be quickly transferred to the metal radiator 34, improving the heat dissipation rate of the heat dissipation mechanism 3, thereby reducing the heat dissipation pressure inside the housing 1, increasing the heat dissipation rate, avoiding the influence of the high-temperature working environment on the optical performance, and extending the service life of the optical engine.

[0073] Specifically, as Figure 7 shown, Figure 7 is a schematic diagram of heat transfer of a projector optical engine provided by an embodiment of the present application. Figure 7 As shown, the heat inside the liquid crystal display panel 21 is transferred to the cooler 32 in the heat dissipation mechanism 3 ( Figure 7 the arrow E in Figure 7The direction of the arrow F is the flow direction of the external air) for heat exchange, which can achieve the function of quickly exporting the heat in the housing 1 and improve the heat dissipation efficiency of the projector optical engine.

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

[0075] Specifically, heat dissipation air ducts are provided on one side or both sides of the liquid crystal display module 2, and the cooling fan cooperates with the heat dissipation air ducts, which can blow the heat on the surface of the liquid crystal display panel 21 into the inner cavity of the housing 1 through the action of the cooling fan, and then the heat in the inner cavity of the housing 1 is dissipated to the outside of the housing 1, so as to assist in the heat dissipation of the liquid crystal display panel 21. In this structure, the cooperation between the cooling fan and the heat dissipation air ducts only plays an auxiliary role in heat dissipation, and the wind speed of the cooling fan can be not increased or can be decreased, so as to reduce the fan noise and improve the user experience.

[0076] As Figure 7 shown, the housing 1 may have an air duct L1 and an air duct L2. Under the action of the cooling fan, the surface of the liquid crystal display panel 21 can exchange heat with the air in the inner cavity of the housing 1 ( Figure 7 the direction of the arrow H is the flow direction of the air) to dissipate the heat on the surface of the liquid crystal display panel 21 into the inner cavity of the housing 1. In addition, the heat in the inner cavity of the housing 1 can also be dissipated through the housing 1 ( Figure 7 the direction of the arrow G is the heat transfer direction on the housing).

[0077] Optionally, a cooling fan may not be provided inside the housing 1, which can avoid the noise of the fan. There is no limitation here and it depends on the actual situation.

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

[0079] Specifically, the buckling of the above-mentioned fixing frame 24 and border 25 can fix the position of the liquid crystal display panel 21, can protect the liquid crystal display panel 21, and improve the service life of the projector optical engine.

[0080] Specifically, the materials of the fixing frame 24 and the border 25 can be metal materials or plastic materials, which are easy to manufacture and save costs, or the materials of the fixing frame 24 and the border 25 can also be other materials, which are not limited here; for example, the material of the fixing frame 24 can be a plastic material, and the material of the border 25 can be a metal material.

[0081] Specifically, as Figure 8 and Figure 1 shown, the housing 1 may have an opening corresponding to the display module 2, and a part 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 to realize the assembly of the heat dissipation mechanism 3 and the display module 2.

[0082] In the embodiment of the present application, the functional area A of the first substrate 211 has a display area and a non-display area arranged around the display area. Both sides of the non-display area along the first direction may have heat dissipation areas B. One side of the non-display area along the second direction and located on the side of the display area 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 further includes a flexible circuit board 26, and the flexible circuit board 26 may be bonded and connected to the bonding terminals on the first substrate 211, as Figure 2The projector optical machine may further include a main control circuit board, which may be connected to the flexible circuit board 26 to drive the display module 2 to display.

[0083] In the embodiment of the present application, the assembly process of the projector optical machine can be: first, the liquid crystal display panel 21 is placed on the fixing frame 24; then, the frame 25 is matched with the fixing frame 24 to fix the liquid crystal display panel 21 and assemble into a display module 2, such as Figure 10 Then, the display module 2 is assembled to 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 avoidance opening on the frame 25.

[0084] In an embodiment of the present application, the projector optical machine may specifically include a light source, a focusing element, a display module, an optical lens, a reflector and a lens assembly, etc. The light source, the focusing element, the display module, the optical lens and the reflector can be located inside the shell, and the lens assembly is assembled on the shell, and the inner cavity of the shell forms a closed space; wherein, the light source is located on the light incident side of the display module, and is used to provide incident light for the display module; the focusing element can convert the light emitted by the light source into collimated light, and converge it 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] An embodiment of the present application also provides a projector, comprising any one of the projector optical machines provided in the above technical solutions.

[0086] In the projector provided in the embodiment of the present application, the projector optical machine includes a housing 1, a light source, a display module 2 and at least one heat dissipation mechanism 3, wherein the light source is located in the inner cavity of the housing 1, 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 in 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 arranged in the heat dissipation area B of the first substrate 211, that is, the heat dissipation mechanism 3 is located on the outside of the housing 1; when the light emitted by the light source irradiates the display module 2 When the display module 2 is on, since the transmittance of the display module 2 is low, most of the light energy is converted into heat energy, the temperature on the liquid crystal display panel 21 rises, and the heat dissipation mechanism 3 located on the outside of the shell 1 starts to work. Most of the heat inside the liquid crystal display panel 21 can be exported 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 take away the heat inside the shell 1, realize the heat exchange between the inner cavity of the shell 1 and the outer side of the shell 1, reduce the temperature of the inner cavity of the shell 1, reduce the heat dissipation pressure of the inner cavity of the shell 1, improve the heat dissipation efficiency of the optical machine, avoid the high temperature working environment affecting the optical performance of the projector optical machine, and increase the service life of the projector optical machine.

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

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

Claims

1. A projector optical machine, wherein: include: a housing having an inner cavity; A light source, the light source being located in the inner cavity of the shell; A display module, the display module is located at the light emitting side of the light source, the display module includes a liquid crystal display panel, the liquid crystal display panel includes a first substrate and a second substrate arranged in a box, the first substrate is adjacent to the light source, the second substrate is located on a side of the first substrate away from the light source, the first substrate includes 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; At least one heat dissipation mechanism is disposed in a heat dissipation area of ​​the first substrate, and is used to achieve heat exchange between the inside of the liquid crystal display panel and the outside of the housing.

2. The projector optical machine according to claim 1, wherein: The heat dissipation area of ​​the first substrate comprises a heat dissipation material layer, the heat dissipation material layer is located on a side of the first substrate facing the second substrate, and the heat dissipation mechanism is located on a side of the heat dissipation material layer facing the second substrate.

3. The projector optical machine according to claim 2, wherein: The heat dissipation material layer is made of silicon nitride material.

4. The projector optical machine according to any one of claims 1 to 3, wherein: Both sides of the functional area of ​​the first substrate are provided with the heat dissipation areas, and each heat dissipation area is provided with the heat dissipation mechanism.

5. The projector optical machine according to any one of claims 1 to 4, wherein: The heat dissipation mechanism comprises a first heat conductive adhesive layer, and the heat dissipation mechanism is bonded to the first substrate via the first heat conductive adhesive layer.

6. The projector optical machine according to any one of claims 1 to 5, wherein: The heat dissipation mechanism includes a cooling sheet bonded to the heat dissipation area of ​​the first substrate, and the cooling sheet is used to form heat exchange with the first substrate to achieve heat dissipation for the liquid crystal display panel.

7. The projector optical machine according to claim 6, wherein: The refrigeration plate is a heat spreader.

8. The projector optical machine according to claim 6, wherein: The material of the cooling plate is semiconductor material. The cooling plate has a first electrode and a second electrode. The first electrode and the second electrode are used to connect the positive electrode and the negative electrode of a direct current power source respectively.

9. The projector optical machine according to any one of claims 6 to 8, wherein: The heat dissipation mechanism further includes a metal heat sink, and the metal heat sink is located on a side of the cooling fin away from the first substrate.

10. The projector optical machine according to claim 9, wherein: The metal heat sink is in a fin structure.

11. The projector optical machine according to claim 9 or 10, wherein: The heat dissipation mechanism further includes a second heat-conducting adhesive layer, and the metal heat sink and the cooling plate are bonded together by the second heat-conducting adhesive.

12. The projector optical machine according to any one of claims 1 to 11, wherein: Also includes a heat dissipation fan, wherein the heat dissipation fan is located in the housing; The housing has a heat dissipation duct inside, and the heat dissipation duct is located on a side of the first substrate facing away from the second substrate and / or on a side of the second substrate facing away from the first substrate; The heat dissipation fan is used to accelerate the heat exchange between the air in the heat dissipation duct and the air outside the heat dissipation duct.

13. The projector optical machine according to any one of claims 1 to 12, wherein: The display module also includes a first polarizer and a second polarizer; The first polarizer is attached to a side of the first substrate facing away from the second substrate; The second polarizer is attached to a side of the second substrate facing away from the first substrate, and a polarization direction of the second polarizer is perpendicular to a polarization direction of the first polarizer.

14. The projector optical machine according to any one of claims 1 to 13, wherein: The display module also includes a fixed frame and a frame; The functional area of ​​the first substrate comprises a display area and a non-display area arranged around the display area; The fixing frame is located at a side of the liquid crystal display panel adjacent to the light source, and the fixing frame has a first light-transmitting opening, and the orthographic projection of the first light-transmitting opening on the first substrate coincides with the display area; The frame is located at a side of the liquid crystal display panel away from the light source, the frame has a second light-transmitting opening and at least one avoidance opening, the orthographic projection of the second light-transmitting opening on the first substrate coincides with the display area, the avoidance opening is opposite to the heat dissipation area, and the frame is matched and buckled with the fixing frame to fix the liquid crystal display panel; The display module is assembled on the housing through the frame and the fixing frame; The at least one heat dissipation mechanism corresponds to the at least one avoidance opening in a one-to-one manner, and the heat dissipation mechanism is bonded to the first substrate through the avoidance opening.

15. A projector, wherein: Comprising a projector optical machine as described in any one of claims 1-14.

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