Projection liquid crystal screen heat dissipation structure
By combining a TEC heat dissipation structure with a crossflow fan and an evaporator design, the problem of excessively high surface temperature of the LCD screen is solved, achieving efficient heat dissipation, reducing the risk of screen burn-in, and optimizing product design.
Patent Information
- Application Number
- CN202423192330.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In high-brightness projection displays, the surface temperature of the LCD screen becomes too high, leading to screen burn-in and failure.
It adopts a TEC heat dissipation structure and a cross-flow fan in conjunction with the evaporator. It achieves efficient heat dissipation by blowing cold air and exchanging heat on the surface of the evaporator, combined with the lamp plate heat sink and heat transfer medium.
It effectively reduces the surface temperature of the LCD screen, reduces the risk of screen burn-in failure, improves heat dissipation efficiency, and reduces product size.
Smart Images
Figure CN223664898U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to projection display technical field especially relates to a projection liquid crystal screen heat radiation structure. BACKGROUND
[0002] Projection display technology pursues high brightness display, needs to continuously improve lamp panel electric power, corresponding thermal radiation heat continuously increases, and thermal radiation heat is projected on the liquid crystal screen, and it is a big test to the liquid crystal screen with temperature resistance requirement. SUMMARY
[0003] The utility model provides a projection liquid crystal screen heat radiation structure, aims at solving the problem of high surface temperature of liquid crystal screen, poor temperature resistance of liquid crystal screen and easy screen burnout in high brightness projection display application.
[0004] The utility model provides a projection liquid crystal screen heat radiation structure, including base, display screen, TEC heat radiation structure, light source structure, evaporimeter and cross flow fan, the display screen sets up in the base, the light source structure sets up below the display screen, the TEC heat radiation structure sets up one side of the light source structure, the evaporimeter sets up above the TEC heat radiation structure, one end of the evaporimeter is towards the direction of the display screen and sets up, the cross flow fan is connected with the base and is located the other end of the evaporimeter, and the air outlet of cross flow fan is towards the direction of the display screen and the base inside and sets up.
[0005] As a further improvement of the utility model, the base includes base, cover plate and support, the cover plate is connected in one side of the base, the support is arranged in the inside of the base, and the display screen is clamped in the support.
[0006] As a further improvement of the utility model, the light source structure includes lamp panel, first lens and second lens, the first lens is arranged at the top of the lamp panel, the second lens is arranged at the top of the first lens, and the second lens is arranged close to the display screen.
[0007] As a further improvement of the utility model, the bottom of the lamp panel is equipped with lamp panel radiator.
[0008] As a further improvement of the utility model, the cross flow fan is arranged in the fan installation shell, and the fan installation shell is connected to the rear end of the base and communicates with the internal space of the base.
[0009] As a further improvement of the present application, the TEC heat dissipation structure comprises a TEC refrigeration sheet and a TEC radiator, the TEC radiator is arranged on one side of the light source structure, the TEC refrigeration sheet is arranged on the top of the TEC radiator, and the refrigeration surface of the TEC refrigeration sheet is in contact with the evaporator.
[0010] As a further improvement of the present application, a layer of heat-conducting medium is arranged between the refrigeration surface of the TEC refrigeration sheet and the evaporator.
[0011] As a further improvement of the present application, a TEC heat dissipation fin is arranged on the TEC radiator, and a layer of heat-conducting medium is arranged between the TEC heat dissipation fin and the heating surface of the TEC radiator.
[0012] As a further improvement of the present application, the front end of the base is provided with an air outlet.
[0013] As a further improvement of the present application, the rear end of the base is provided with a projection lens, and the base is provided with a reflector, and the display screen outputs images to the projection lens through the reflector.
[0014] The present application has the advantages that: the evaporator is arranged on the TEC refrigeration sheet, the contact area of the surrounding air is doubled, the cold air on the surface of the evaporator is blown to the upper surface of the display screen, the display screen is provided with efficient heat dissipation, the air heat exchange is effectively promoted, and the refrigeration efficiency is improved; the cross-flow fan with a long section is used, the cold air can fully cover the display screen, the heat dissipation efficiency of the display screen is improved, the product volume is reduced to the greatest extent, and the product competitiveness is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a sectional view of the present application;
[0016] Figure 2 is an exploded view of the present application;
[0017] Figure 3 is a schematic view of the evaporator of the present application.
[0018] Fig. 1 is a perspective view of the present application; Fig. 2 is a sectional view of the present application; Fig. 3 is an exploded view of the present application; Fig. 4 is a schematic view of the evaporator of the present application; Fig. 5 is a schematic view of the cross-flow fan of the present application; and Fig. 6 is a schematic view of the TEC heat dissipation structure of the present application. DETAILED DESCRIPTION
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0020] like Figures 1-2 As shown, this utility model provides a heat dissipation structure for a projection LCD screen, including a base, a display screen 8, a TEC heat dissipation structure, a light source structure, an evaporator 3, and a crossflow fan 4. The display screen 8 is disposed inside the base, the light source structure is disposed below the display screen 8, the TEC heat dissipation structure is disposed on one side of the light source structure, the evaporator 3 is disposed above the TEC heat dissipation structure, one end of the evaporator 3 is disposed towards the display screen 8, the crossflow fan 4 is connected to the base and is located at the other end of the evaporator 3, and the air outlet 17 of the crossflow fan 4 is disposed towards the display screen 8 and the interior of the base.
[0021] As one embodiment of the present utility model, the base includes a base 1, a cover plate 2 and a bracket 14. The cover plate 2 is connected to one side of the base 1, the bracket 14 is disposed inside the base 1, and the display screen 8 is snapped into the bracket 14.
[0022] In another embodiment of the present invention, the light source structure includes a lamp panel 11, a first lens 12 and a second lens 13. The first lens 12 is disposed on the top of the lamp panel 11, and the second lens 13 is disposed on the top of the first lens 12. The second lens 13 is disposed close to the display screen 8.
[0023] In another embodiment of the present invention, a lamp plate heat sink 16 is provided at the bottom of the lamp plate 11.
[0024] In another embodiment of this utility model, the crossflow fan 4 is disposed in the fan mounting housing 15, which is connected to the rear end of the base 1 and communicates with the internal space of the base 1.
[0025] In another embodiment of the present invention, the TEC heat dissipation structure includes a TEC cooling plate 6 and a TEC heat sink 5. The TEC heat sink 5 is disposed on one side of the light source structure, and the TEC cooling plate 6 is disposed on the top of the TEC heat sink 5. The cooling surface of the TEC cooling plate 6 is in contact with the evaporator 3.
[0026] As another embodiment of the utility model, a layer of heat-conducting medium is arranged between the refrigeration surface of the TEC refrigeration sheet 6 and the evaporator 3.
[0027] As another embodiment of the utility model, a TEC heat dissipation fin 7 is arranged on the TEC heat sink 5, and a layer of heat-conducting medium is arranged between the TEC heat dissipation fin 7 and the heat generating surface of the TEC heat sink 5.
[0028] As another embodiment of the utility model, the front end of the base is provided with an air outlet 17.
[0029] As another embodiment of the utility model, the rear end of the base is provided with a projection lens 10, and the base is provided with a reflector 9, and the display screen 8 outputs images to the projection lens 10 through the reflector 9.
[0030] The utility model provides a kind of projection liquid crystal screen heat dissipation structure, provides efficient liquid crystal screen heat dissipation solution, provides the basic heat dissipation guarantee for projection display high brightness display, and limitedly reduces liquid crystal screen burn screen failure risk.
[0031] TEC refrigeration technology, full name for thermoelectric cooler (Thermoelectric Cooler), is a kind of technology for realizing refrigeration or heating using semiconductor material Peltier effect.Peltier effect refers to the phenomenon that when direct current passes through the electric couple of two different semiconductor materials, one end of the electric couple absorbs heat, and the other end emits heat.TEC refrigeration technology is widely used in vehicle refrigerator, food cooling and preservation field.
[0032] The light emitted by the lamp panel 11 is transmitted to the display screen 8 through the first lens 12 and the second lens 13, the display screen 8 outputs images to the projection lens 10 through the reflector 9, the power of the lamp panel 11 is high, and the lens condenses light, resulting in that the heat radiation energy received by the display screen 8 is very large, and the surface temperature of the screen is high. By arranging the evaporator 3 above the TEC refrigeration sheet 6, the fins of the evaporator 3 exchange heat with the surrounding air to absorb heat, reduce the temperature of the surrounding air, and use the cross-flow fan 4 with long section to blow the cold air on the surface of the evaporator 3 to the display screen 8, so that the cold air covers the upper and lower surfaces of the display screen 8 and carries away heat, effectively avoiding the risk of burn screen failure of the display screen 8 caused by temperature rise. Figure 3 As shown in the figure, the evaporator 3 is a dense-tooth evaporator with high thermal conductivity.
[0033] The cross flow fan 4 blows the cold air at the evaporator 3 to the space between the display screen 8 and the second lens 13, blows out the heat radiation here from the air outlet 17 at the front end of the base, effectively reduces the heat at the display screen 8, and the cold air blown by the cross flow fan 4 forms a cold air circulation in the inner cavity of the base, enters the inner cavity of the base from the display screen 8, returns to the evaporator 3, and exchanges heat with the display screen 8 in the inner cavity of the base, further reducing the heat of the display screen 8.
[0034] The lamp panel radiator 16 is arranged at the lamp panel 11, which can effectively reduce the heat at the lamp panel 11. Meanwhile, the TEC heat dissipation fin 7 is assembled on the heat-emitting surface of the TEC radiator 5 through a layer of heat-conducting medium, and the heat-emitting surface of the TEC radiator 5 transmits temperature to the TEC heat dissipation fin 7 to achieve heat dissipation. The evaporator 3 is assembled on the refrigeration surface of the TEC refrigeration fin 6 through a layer of heat-conducting medium, and when the TEC refrigeration fin 6 is powered on, the refrigeration surface is rapidly cooled, the evaporator 3 is rapidly cooled by transmission, and the evaporator 3 cools the surrounding air, and outputs cold air.
[0035] The evaporator 3 is added to the TEC refrigeration fin 6, the contact area of the surrounding air is doubled, the cold air on the surface of the evaporator 3 is blown to the upper surface of the display screen 8, high-efficiency heat dissipation is provided for the display screen 8, the air heat exchange around is effectively promoted, and the refrigeration efficiency is improved; the cross flow fan 4 with a long section is used, the cold air can fully cover the display screen 8, the heat dissipation efficiency of the display screen 8 is improved, the product volume can be reduced to the greatest extent, and the product competitiveness is improved.
[0036] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a plurality of simple deductions or substitutions can be made, and all of them should be regarded as belonging to the protection range of the utility model.
Claims
1. A heat dissipation structure for a projection LCD screen, characterized in that, The device includes a base, a display screen, a TEC heat dissipation structure, a light source structure, an evaporator, and a crossflow fan. The display screen is located inside the base, the light source structure is located below the display screen, the TEC heat dissipation structure is located on one side of the light source structure, the evaporator is located above the TEC heat dissipation structure, one end of the evaporator is oriented towards the display screen, and the crossflow fan is connected to the base and located at the other end of the evaporator. The air outlet of the crossflow fan is oriented towards the display screen and the interior of the base.
2. The heat dissipation structure for a projection LCD screen according to claim 1, characterized in that, The base includes a base, a cover plate, and a bracket. The cover plate is connected to one side of the base, the bracket is disposed inside the base, and the display screen is snapped into the bracket.
3. The heat dissipation structure for a projection LCD screen according to claim 1, characterized in that, The light source structure includes a lamp panel, a first lens, and a second lens. The first lens is disposed on the top of the lamp panel, the second lens is disposed on the top of the first lens, and the second lens is disposed close to the display screen.
4. The heat dissipation structure for a projection LCD screen according to claim 3, characterized in that, The bottom of the lamp panel is equipped with a lamp panel heat sink.
5. The heat dissipation structure for a projection LCD screen according to claim 2, characterized in that, The crossflow fan is housed in a fan mounting housing, which is connected to the rear end of the base and communicates with the internal space of the base.
6. The heat dissipation structure for a projection LCD screen according to claim 1, characterized in that, The TEC heat dissipation structure includes a TEC cooling chip and a TEC heat sink. The TEC heat sink is disposed on one side of the light source structure, and the TEC cooling chip is disposed on the top of the TEC heat sink. The cooling surface of the TEC cooling chip is in contact with the evaporator.
7. The heat dissipation structure for a projection LCD screen according to claim 6, characterized in that, A heat-conducting medium is provided between the cooling surface of the TEC cooling chip and the evaporator.
8. The heat dissipation structure for a projection LCD screen according to claim 6, characterized in that, The TEC radiator is provided with TEC heat dissipation fins, and a layer of heat-conducting medium is provided between the TEC heat dissipation fins and the heating surface of the TEC radiator.
9. The heat dissipation structure for a projection LCD screen according to claim 1, characterized in that, The base has an air outlet at its front end.
10. The heat dissipation structure for a projection LCD screen according to claim 1, characterized in that, The base is equipped with a projection lens at its rear end and a reflector. The display screen outputs images to the projection lens through the reflector.