Projector optical engine and projector

Abstract

The present application relates to the technical field of display devices. Disclosed are a projector optical engine and a projector. The projector optical engine comprises: a housing having an inner cavity; a light source located in the inner cavity of the housing; a display module, which is located on a light-emergent side of the light source and comprises a liquid crystal display panel, wherein the liquid crystal display panel comprises a first substrate and a second substrate which are oppositely bonded, the first substrate being adjacent to the light source, the second substrate being located on the side of the first substrate facing away from the light source, the first substrate comprising a functional area and a heat dissipation area, the orthographic projection of the second substrate on the first substrate falling within the functional area, the functional area of the first substrate and the second substrate being located in the inner cavity of the housing, and the heat dissipation area of the first substrate extending to the outer side of the housing; and at least one heat dissipation mechanism, which is arranged in the heat dissipation area of the first substrate and is configured to realize heat exchange between the interior of the liquid crystal display panel and the outside of the housing. The projector optical engine can prevent optical performance from being affected by a high-temperature working environment, thereby prolonging the service life.

Description

A projector light engine and a projector

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411252964.5, filed on September 6, 2024, and entitled "A projector light engine and a projector", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of display devices, and in particular to a projector light engine and a projector. BACKGROUND

[0004] A liquid crystal display panel (LCD) is a core device of a single liquid crystal projector closed light engine. When the projector light engine 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 engine is poor, the heat in the light engine cannot be dissipated, the temperature in the light engine 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 decrease, but also the service life will decrease sharply. Malfunctions such as failure of the polarizing plate and failure of the liquid crystal display panel may occur.

[0005] Generally, the closed light engine 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 engine, 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.

[0006] However, the conventional methods 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 separated from the liquid crystal display panel and are fixed separately, the polarization 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 decreases significantly, 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

[0007] The present application provides a projector light engine and a projector, which can avoid the influence of high-temperature working environment on the optical performance and improve the service life.

[0008] To achieve the above object, the present application provides the following technical solutions:

[0009] A projector light machine, comprising:

[0010] A housing having an inner cavity;

[0011] A light source located in the inner cavity of the housing;

[0012] A display module located on the light emitting side of the light source, the display module comprising a liquid crystal display panel, the liquid crystal display panel comprising a first substrate and a second substrate arranged in a box, the first substrate being adjacent to the light source, the second substrate being located on the side of the first substrate away from the light source, the first substrate comprising a functional area and a heat dissipation area, the orthographic projection of the second substrate on the first substrate being located in the functional area, the functional area of the first substrate and the second substrate being located in the inner cavity of the housing, and the heat dissipation area of the first substrate extending to the outside of the housing;

[0013] At least one heat dissipation mechanism arranged in the heat dissipation area of the first substrate, the heat dissipation mechanism being used for heat exchange between the inside of the liquid crystal display panel and the outside of the housing.

[0014] 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.

[0015] Optionally, the material of the heat dissipation material layer is silicon nitride material.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Optionally, the refrigeration sheet is a heat plate.

[0020] Optionally, the material of the refrigeration sheet is 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.

[0021] Optionally, the heat dissipation mechanism further comprises a metal heat sink, the metal heat sink being located on the side of the refrigeration sheet away from the first substrate.

[0022] Optionally, the metal heat sink is in a fin structure.

[0023] Optionally, the heat dissipation mechanism further comprises a second thermally conductive adhesive layer, the metal heat sink and the refrigeration sheet being bonded by the second thermally conductive adhesive.

[0024] Optionally, the heat dissipation mechanism further comprises a heat dissipation fan, the heat dissipation fan being located in the housing.

[0025] Optionally, the housing has a heat dissipation air duct, the heat dissipation air duct being 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.

[0026] The heat dissipation fan is configured to accelerate heat exchange between the air in the heat dissipation air duct and the air outside the heat dissipation air duct.

[0027] Optionally, the display module further comprises a first polarizing sheet and a second polarizing sheet.

[0028] The first polarizing sheet is attached to the side of the first substrate away from the second substrate.

[0029] The second polarizing sheet is attached to the side of the second substrate away from the first substrate, the polarization direction of the second polarizing sheet being perpendicular to the polarization direction of the first polarizing sheet.

[0030] Optionally, the display module further comprises a fixed frame and a bezel.

[0031] The functional area of the first substrate has a display area and a non-display area surrounding the display area.

[0032] The fixed frame is located on the side of the liquid crystal display panel adjacent to the light source, the fixed frame having a first light transmission opening, the orthogonal projection of the first light transmission opening on the first substrate coinciding with the display area.

[0033] The bezel is located on the side of the liquid crystal display panel away from the light source, the bezel having a second light transmission opening and at least one avoiding opening, the orthogonal projection of the second light transmission opening on the first substrate coinciding with the display area, the avoiding opening being opposite to the heat dissipation area, the bezel being buckled with the fixed frame to fix the liquid crystal display panel.

[0034] The display module is assembled on the housing through the bezel and the fixed frame.

[0035] 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.

[0036] The application also provides a projector, which comprises the projector light machine provided in any of the technical solutions.

[0037] The application provides a projector light machine and a projector. The projector light machine comprises a shell, a light source, a display module and at least one heat dissipation mechanism. The light source is located in an inner cavity of the shell, and the display module is located on a light emitting side of the light source. The display module comprises a liquid crystal display panel. A functional area of a first substrate and a second substrate in the liquid crystal display panel are located in the inner cavity of the shell, a heat dissipation area of the first substrate extends to an outer side of the shell, and the heat dissipation mechanism is arranged on the heat dissipation area of the first substrate, that is, the heat dissipation mechanism is located on the outer side of the shell. When light emitted by the light source irradiates on the display module, most of the light energy is converted into heat energy due to the low transmittance of the display module, the temperature inside the liquid crystal display panel is increased, the heat dissipation mechanism located on the outer side of the shell 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, direct heat exchange between the inside of the liquid crystal display panel and the outer side of the shell is realized, the heat is not radiated to the inner cavity of the shell, the temperature in the inner cavity of the shell can be effectively reduced, the heat dissipation pressure of the inner cavity of the shell is reduced, the heat dissipation efficiency of the projector light machine is improved, the optical performance of the projector light machine can be avoided from being affected by the high-temperature working environment, and the service life of the projector light machine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] FIG. 1 is a structural schematic diagram of a projector light machine provided in an embodiment of the application;

[0039] FIG. 2 is a structural schematic diagram of a liquid crystal display panel provided in an embodiment of the application;

[0040] FIG. 3 is a plane schematic diagram of a projector light machine provided in an embodiment of the application;

[0041] FIG. 4 is a sectional view of a projector light machine provided in an embodiment of the application;

[0042] FIG. 5 is a heat transfer schematic diagram of a projector light machine provided in an embodiment of the application;

[0043] FIG. 6 is a structural schematic diagram of a heat dissipation mechanism provided in an embodiment of the application;

[0044] FIG. 7 is a heat transfer schematic diagram of a projector light machine provided in an embodiment of the application;

[0045] FIG. 8 is an exploded view of a projector light machine provided in an embodiment of the application;

[0046] FIG. 9 is an exploded view of a display module provided in an embodiment of the application;

[0047] Fig. 10 is a structural schematic diagram of a display module provided by an embodiment of the present application.

[0048] Icon: 1 - housing; 2 - display module; 21 - liquid crystal display panel; 211 - first substrate; 212 - second substrate; 22 - first polarizer; 23 - second polarizer; 24 - fixed frame; 241 - first light-transmitting port; 25 - frame; 251 - second light-transmitting port; 252 - avoiding port; 26 - flexible circuit board; 3 - heat dissipation mechanism; 31 - first heat-conducting adhesive layer; 32 - refrigeration sheet; 33 - second heat-conducting adhesive layer; 34 - metal heat sink. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0050] Please refer to Fig. 1, which is a structural schematic diagram of a projector light machine provided by an embodiment of the present application. The embodiment of the present application provides a projector light machine, which comprises:

[0051] Housing 1, the housing 1 has an inner cavity;

[0052] Light source, the light source is located in the inner cavity of the housing 1;

[0053] Display module 2, the display module 2 is located on the light-emitting side of the light source, the display module 2 comprises a liquid crystal display panel 21, the liquid crystal display panel 21 comprises a first substrate 211 and a second substrate 212 arranged in a cell, the first substrate 211 is adjacent to the light source, the second substrate 212 is located on the side of the first substrate 211 away from the light source, the first substrate 211 comprises 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, and the heat dissipation area B of the first substrate 211 extends to the outside of the housing 1, as shown in Fig. 2, which is a structural schematic diagram of a liquid crystal display panel 21 provided by an embodiment of the present application.

[0054] At least one heat dissipation mechanism 3, the heat dissipation mechanism 3 is arranged on 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, as shown in Fig. 3, which is a planar structural schematic diagram of a projector light machine provided by an embodiment of the present application. The area inside the dotted line in Fig. 3 is the part inside the housing 1, and the area outside the dotted line is the part outside the housing 1.

[0055] The projector optical machine provided by the embodiment of the present application comprises a shell 1, a light source, a display module 2 and at least one heat dissipation mechanism 3. The light source is located in the inner cavity of the shell 1, and the display module 2 is located on the light emitting side of the light source. The display module 2 comprises 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 shell 1, the heat dissipation area B of the first substrate 211 extends to the outside of the shell 1, and the heat dissipation mechanism 3 is arranged on the heat dissipation area B of the first substrate 211, that is, the heat dissipation mechanism 3 is located on the outside of the shell 1. When the light emitted by the light source irradiates on the display module 2, most of the light energy is converted into heat energy due to the low transmittance of the display module 2, the temperature inside the liquid crystal display panel 21 rises, 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 directly conducted to the heat dissipation mechanism 3 through the functional area A of the first substrate 211, the direct heat exchange between the inside of the liquid crystal display panel 21 and the outside of the shell 1 is realized, the heat is not radiated to the inner cavity of the shell 1, the temperature in the inner cavity of the shell 1 can be effectively reduced, the heat dissipation pressure in the inner cavity of the shell 1 is reduced, the heat dissipation efficiency of the projector optical machine is improved, the optical performance of the projector optical machine can be avoided from being affected by the high temperature working environment, and the service life of the projector optical machine is improved.

[0056] In the embodiment of the present application, the material of the shell 1 can be plastic material, which is easy to manufacture and can save cost. The shell 1 can also be made of other materials, which is not limited herein.

[0057] In the embodiment of the present application, the first substrate 211 can be an array substrate, and the second substrate 212 can be a color film substrate. The liquid crystal display panel 21 further comprises a liquid crystal layer and a glue frame. The liquid crystal layer and the glue frame are located between the array substrate and the color film substrate. The orthographic projection of the liquid crystal layer on the first substrate 211 is located in the functional area A. The glue frame is used to limit the setting area of the liquid crystal layer.

[0058] In the embodiment of the present application, the display module 2 can further comprise a first polaroid 22 and a second polaroid 23. The first polaroid 22 is attached to the side of the first substrate 211 away from the second substrate 212, and the second polaroid 23 is attached to the side of the second substrate 212 away from the first substrate 211. The polarization direction of the second polaroid 23 is perpendicular to the polarization direction of the first polaroid 22, as shown in FIG. 4, which is a structure schematic diagram of a projector optical machine provided by the embodiment of the present application. The orthographic projection of the first polaroid 22 on the first substrate 211 can be located in the functional area A. The heat dissipation mechanism 3 on the first substrate 211 can realize the rapid heat exchange between the inside of the liquid crystal display panel 21 and the outside of the shell 1, which can accelerate the heat dissipation speed of the inner cavity of the shell, reduce the temperature in the inner cavity of the shell 1, avoid the problem of the failure of the polaroid and the problem of the polarization angle deviating 90° between the first polaroid 22 and the second polaroid 23, and ensure the display contrast of the display module 2.

[0059] In the embodiment of the present application, the heat dissipation area B of the first substrate 211 can have a heat dissipation material layer, which can 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 shown in FIG. 3. The heat dissipation mechanism 3 can be bonded with the heat dissipation material layer on the first substrate 211, and the heat dissipation material layer can have good heat conduction performance and can quickly transfer the heat on the liquid crystal display panel 21 to the heat dissipation mechanism 3.

[0060] Specifically, the material of the heat dissipation material layer can be silicon nitride material (SiNx), which has good heat conduction performance. The heat dissipation material layer of the heat dissipation area B of the first substrate 211 can be prepared in the same layer as the film layer of the functional area A of the first substrate 211, for example, the heat dissipation material layer of the heat dissipation area B is prepared in the same layer as the passivation layer of the functional area A, which can simplify the manufacturing process and save manufacturing cost.

[0061] In the embodiment of the present application, as shown in FIG. 3, the functional area A of the first substrate 211 can have a heat dissipation area B on each side, and 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 and accelerate the heat dissipation speed of the liquid crystal display panel 21.

[0062] As shown in FIG. 5, FIG. 5 is a schematic diagram of heat transfer of a projector light machine provided in the embodiment of the present application, and the direction of the arrow in FIG. 5 is the direction of heat transfer. The first substrate 211 of the liquid crystal display substrate has a heat dissipation mechanism 3 on each side, and the heat of the part of the liquid crystal display panel 21 located in the shell 1 is transferred to the two sides of the liquid crystal display panel 21. The heat dissipation mechanism 3 outside the shell 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.

[0063] Alternatively, the position of the heat dissipation area B on the first substrate 211 can also be other positions, which is not limited here and is determined according to the actual situation.

[0064] In the embodiment of the present application, the heat dissipation mechanism 3 can include a first heat-conducting adhesive layer 31, and the heat dissipation mechanism 3 can be bonded with the first substrate 211 through the first heat-conducting adhesive layer 31, which can accelerate the heat transfer on the first substrate 211 to the heat dissipation mechanism 3, as shown in FIG. 4 and FIG. 6, which is a structural schematic diagram of the heat dissipation mechanism 3 provided in the embodiment of the present application.

[0065] In the embodiment of the present application, the heat dissipation mechanism 3 can include a refrigeration sheet 32 bonded to the heat dissipation area B of the first substrate 211, as shown in FIGS. 4 and 6. The refrigeration sheet 32 can be used to exchange heat with the first substrate 211 to achieve heat dissipation of the liquid crystal display panel 21. The refrigeration sheet 32 can be used for refrigeration. The refrigeration sheet 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 light machine.

[0066] Specifically, the refrigeration sheet 32 can be a vapor chamber. The vapor chamber is a vacuum cavity with a microstructure on the inner wall, usually made of copper. When heat is conducted from the first substrate 211 to the vapor chamber, the cooling liquid in the cavity begins to vaporize after being heated in a low vacuum environment. At this time, the heat energy is absorbed and the volume expands rapidly. The gas-phase cooling medium rapidly fills the entire cavity. When the gas-phase medium contacts a relatively cold area, condensation occurs. The condensation releases the heat accumulated during evaporation. The condensed cooling liquid returns to the evaporation heat source through the microstructure capillary channel. This operation will be performed in the cavity, which can achieve rapid heat dissipation of the liquid crystal display panel 21.

[0067] Specifically, the material of the refrigeration sheet 32 can be a semiconductor material. The refrigeration sheet 32 has a first electrode and a second electrode for connecting the positive and negative poles of a direct current power supply, respectively.

[0068] The refrigeration sheet 32 can be a semiconductor material refrigeration sheet (TEC) 32, which is made of semiconductor materials using the Peltier effect. The Peltier effect refers to the phenomenon that one end absorbs heat and the other end releases heat when a direct current passes through an electric couple composed of two semiconductor materials. Heavily doped N-type and P-type bismuth telluride are mainly used as semiconductor materials for TECs. Bismuth telluride elements are electrically connected in series and are parallel heat sources. TECs include some P-type and N-type pairs (groups) connected 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 side, creating a "hot" side and a "cold" side on the TEC, which is the principle of heating and refrigeration.

[0069] In the embodiment, when the first electrode and the second electrode of the semiconductor material cooling sheet 32 are connected to direct current, a cold-hot temperature difference phenomenon occurs between the side of the semiconductor material cooling sheet 32 close to the first substrate 211 and the side away from the first substrate 211, heat exchange between the first substrate 211 and the cooling sheet 32 can be achieved, and the heat dissipation speed of the liquid crystal display panel 21 is accelerated. When the heat dissipation mechanism 3 uses the semiconductor material cooling sheet 32 (TEC), the heat dissipation mechanism 3 can quickly take away the heat inside the liquid crystal display panel 21 and the heat generated by the power of the TEC itself, thereby enhancing the heat dissipation effect of the projector light machine.

[0070] In the embodiment, as shown in FIGS. 4 and 6, the heat dissipation mechanism 3 can further include a metal heat sink 34, which is located on the side of the cooling sheet 32 away from the first substrate 211. The metal heat sink 34 can accelerate the heat dissipation speed of the side of the cooling sheet 32 away from the first substrate 211, thereby improving the overall heat dissipation efficiency of the light machine.

[0071] Specifically, the material of the metal heat sink 34 can be aluminum alloy, copper or other metal materials, which is not limited here and can be determined according to actual conditions.

[0072] Specifically, as shown in FIGS. 4 and 6, the metal heat sink 34 can have a fin 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 in the inner cavity of the shell 1.

[0073] In the embodiment, as shown in FIGS. 4 and 6, the heat dissipation mechanism 3 further includes a second thermally conductive adhesive layer 33, and the metal heat sink 34 and the cooling sheet 32 can be bonded by the second thermally conductive adhesive. The second thermally conductive adhesive layer 33 can quickly transfer the heat on the cooling sheet 32 to the metal heat sink 34, thereby improving the heat dissipation speed of the heat dissipation mechanism 3, reducing the heat dissipation pressure inside the shell 1, improving the heat dissipation rate, avoiding the influence of high-temperature working environment on the optical performance, and improving the service life of the light machine.

[0074] Specifically, as shown in FIG. 7, which is a schematic diagram of heat transfer of a projector light machine according to the embodiment, the heat inside the liquid crystal display panel 21 is transferred to the cooling sheet 32 in the heat dissipation mechanism 3 (the direction of the arrow E in FIG. 7 is the heat transfer direction), and the heat on the heat dissipation mechanism 3 exchanges with the air outside (the direction of the arrow F in FIG. 7 is the flow direction of the air outside), which can achieve the function of quickly leading out the heat in the shell 1, thereby improving the heat dissipation efficiency of the projector light machine.

[0075] In the embodiment of the present application, the projector light machine can further include a heat dissipation fan, which is located in the shell 1; the shell 1 has a heat dissipation air duct, which is 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 heat dissipation 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.

[0076] Specifically, the heat dissipation air duct is arranged on one side or both sides of the liquid crystal display module 2, and the heat dissipation fan cooperates with the heat dissipation air duct to blow the heat on the surface of the liquid crystal display panel 21 to the inner cavity of the shell 1 through the action of the heat dissipation fan, and then the heat in the inner cavity of the shell 1 is dissipated to the outside of the shell 1, thereby assisting the heat dissipation of the liquid crystal display panel 21. In this structure, the cooperation of the heat dissipation fan and the heat dissipation air duct only plays an auxiliary heat dissipation role, and the air speed of the heat dissipation fan can be reduced or can be reduced, thereby reducing the fan noise and improving the user experience.

[0077] As shown in FIG. 7, the shell 1 can have an air duct L1 and an air duct L2, under the action of the heat dissipation fan, the surface of the liquid crystal display panel 21 can exchange heat with the air in the inner cavity of the shell 1 (the direction of the arrow H in FIG. 7 is the flow direction of the air), and the heat on the surface of the liquid crystal display panel 21 is dissipated to the inner cavity of the shell 1. In addition, the heat in the inner cavity of the shell 1 can also be dissipated through the shell 1 (the direction of the arrow G in FIG. 7 is the heat transfer direction of the shell).

[0078] Optionally, the heat dissipation fan can not be arranged in the shell 1, which can avoid the noise of the fan, which is not limited here and is determined according to the actual situation.

[0079] In the embodiment of the present application, the display module 2 can further include a fixed frame 24 and a bezel 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 fixed frame 24 is located on the side of the liquid crystal display panel 21 close to the light source, and the fixed frame 24 has a first light transmission port 241, the orthogonal projection of the first light transmission port 241 on the first substrate 211 coincides with the display area; the bezel 25 is located on the side of the liquid crystal display panel 21 away from the light source, and the bezel 25 has a second light transmission port 251 and at least one avoiding port 252, the orthogonal projection of the second light transmission port 251 on the first substrate 211 coincides with the display area, the avoiding port 252 is opposite to the heat dissipation area B, and the bezel 25 cooperates with the fixed frame 24 to be buckled to fix the liquid crystal display panel 21; the display module 2 is assembled on the shell 1 through the bezel 25 and the fixed frame 24; at least one heat dissipation mechanism 3 corresponds to at least one avoiding port 252, and the heat dissipation mechanism 3 is bonded to the first substrate 211 through the avoiding port 252, as shown in FIG. 8 and FIG. 9, FIG. 8 is an exploded view of a projector light machine provided by the embodiment of the present application, and FIG. 9 is an exploded view of a display module 2 provided by the embodiment of the present application.

[0080] Specifically, the fixing frame 24 and the edge frame 25 can be buckled to fix the position of the liquid crystal display panel 21, and the liquid crystal display panel 21 can be protected to improve the service life of the projector light machine.

[0081] Specifically, the materials of the fixing frame 24 and the edge frame 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 edge frame 25 can 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 edge frame 25 can be a metal material.

[0082] Specifically, as shown in FIG. 8 and FIG. 1, the shell 1 can have an opening corresponding to the display module 2, and part of the display module 2 extends outside the shell 1 through the opening, so that the heat dissipation area B of the first substrate 211 extends outside the shell 1, and the heat dissipation mechanism 3 is assembled with the display module 2.

[0083] In the embodiment of the application, the functional area A of the first substrate 211 has a display area and a non-display area surrounding the display area, and the non-display area can have a heat dissipation area B on both sides along the first direction, and the non-display area on one side of the display area along the second direction can be a binding area, the first direction is perpendicular to the second direction, and the binding area can have a connection terminal. The display module 2 further comprises a flexible circuit board 26, which can be connected with the binding terminal on the first substrate 211, as shown in FIG. 2. The projector light machine can further comprise a main control circuit board, which can be connected with the flexible circuit board 26 for driving the display module 2 to display.

[0084] In the embodiment of the application, the assembly process of assembling the projector light machine can be: first, placing the liquid crystal display panel 21 on the fixing frame 24; then, cooperating the edge frame 25 with the fixing frame 24 to fix the liquid crystal display panel 21, and assembling into a display module 2, as shown in FIG. 10; then, assembling the display module 2 to the shell; then, bonding the heat dissipation mechanism 3 with the heat dissipation area of the first substrate of the liquid crystal display panel 21 through the avoiding opening on the edge frame 25.

[0085] In the embodiments of the present application, the projector light machine can specifically include a light source, a light collecting element, a display module, an optical lens, a mirror, and a lens assembly, etc. The light source, the light collecting element, the display module, the optical lens, and the mirror can be located inside the shell, and the lens assembly is assembled on the shell. The inner cavity of the shell forms a sealed space. The light source is located at the light-incident side of the display module, and is used to provide incident light for the display module. The light collecting element can convert the light emitted by the light source into collimated light, and converge to the light-incident side of the display module. The display module can display a target display image. The optical lens is used to optimize the display effect. The mirror can reflect the light emitted by the optical lens to the lens assembly. The lens assembly can project the target display image to the projector.

[0086] The embodiments of the present application also provide a projector, which includes any one of the projectors provided in the above technical solutions.

[0087] In the projector provided by the embodiments of the present application, the projector light machine includes a shell 1, a light source, a display module 2, and at least one heat dissipation mechanism 3. The light source is located in the inner cavity of the shell 1. The display module 2 is located at the light-incident 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 shell 1. The heat dissipation area B of the first substrate 211 extends to the outside of the shell 1. The heat dissipation mechanism 3 is arranged 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 shell 1. When the light emitted by the light source irradiates on the display module 2, most of the light energy is converted into heat energy due to the low transmittance of the display module 2. The temperature of the liquid crystal display panel 21 rises. The heat dissipation mechanism 3 located on the outside of the shell 1 starts to work. Most of the heat in 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 take away the heat in the inner cavity of the shell 1, realize the heat exchange between the inner cavity of the shell 1 and the outside 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 light machine, avoid the influence of the high-temperature working environment on the optical performance of the projector light machine, and improve the service life of the projector light machine.

[0088] Specifically, the projector can further include a shell, and the projector light machine can be located inside the shell.

[0089] Obviously, those skilled in the art can make various modifications and variations 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 belong to the scope of the claims of the present application and their equivalent technologies, the present 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 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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