Vehicle-mounted liquid crystal display heating structure
By setting a heating film under the backlight unit of the liquid crystal module, the problems of high cost and electric field influence in the prior art are solved, and the rapid response and high image quality of the liquid crystal screen at low temperatures are achieved.
Patent Information
- Application Number
- CN202422523734.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The prior art when setting a heating layer in an on-board liquid crystal screen is high, and the electric field affects the rotation of the liquid crystal layer, resulting in extended response time and color shift problems at low temperatures.
A heating film is provided under the backlight unit of the liquid crystal module, and the temperature is detected by a temperature sensor and the heating is controlled to avoid an electric field effect on the liquid crystal layer.
It realizes low-cost LCD screen heating, avoids the impact of electric field on the liquid crystal layer, and improves the response speed and picture quality of the LCD screen at low temperatures.
Smart Images
Figure CN223155341U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of liquid crystal screens, and in particular relates to a vehicle-mounted liquid crystal screen heating structure. Background Art
[0002] In-vehicle instrument clusters, center information displays (CID), in-vehicle infotainment systems (IVI) or rear seat entertainment systems (RSE), etc., mostly use liquid crystal display technology. Liquid crystal materials are easy to crystallize at low temperatures. The general operating temperature range is -40 to 85°C. At low temperatures, the viscosity increases, the reaction speed slows down, and the response time becomes longer.
[0003] At -40--30℃, the response time of liquid crystal becomes much slower than that at normal temperature of 20-30℃, which will cause delay / tailing in the playback picture; in addition, the optical parameter △n of liquid crystal will change relative to normal temperature at low temperature, resulting in color cast in the picture quality at low temperature.
[0004] At present, a heating layer is usually set in the liquid crystal module of the liquid crystal screen, such as in the array layer, or under the color photoresist layer. This method requires the addition of other devices (such as light masks), which is costly and inconvenient to implement. In addition, the heating layer is composed of resistance wires, and the electric field generated by its operation will affect the liquid crystal layer and its rotation. Utility Model Content
[0005] Based on this, in order to solve the above technical problems, a vehicle-mounted LCD screen heating structure is provided.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A vehicle-mounted liquid crystal screen heating structure comprises a bottom shell, a liquid crystal module and a PCB board, wherein the liquid crystal module and the PCB board are both arranged in the bottom shell, a temperature sensor is provided in a backlight unit of the liquid crystal module, and the temperature sensor and the PCB board are both electrically connected to a controller, and is characterized in that it also comprises a heating film, wherein the heating film is arranged below the backlight unit, and an upper surface thereof contacts a lower surface of the backlight unit, and the heating film is electrically connected to the PCB board.
[0008] The utility model does not set a heating layer in the liquid crystal module of the liquid crystal screen as in the prior art, but sets a heating film under the backlight unit of the liquid crystal module to heat the entire liquid crystal module. This method is low-cost and easy to implement. Moreover, since the heating film is not in the liquid crystal module, the electric field generated by its operation has no effect on the liquid crystal layer and its rotation. Description of the Drawings
[0009] Figure 1 is a schematic structural diagram of the present utility model;
[0010] Figure 2 is the electrical schematic diagram of the present utility model. Detailed Embodiments
[0011] The following will describe the embodiments of the present utility model with reference to the accompanying drawings of the specification. It should be noted that the embodiments involved in this specification are not exhaustive and do not represent the only embodiments of the present utility model. The following corresponding embodiments are only for clearly explaining the inventive content of the utility model patent of the present utility model, and do not limit its embodiments. For those of ordinary skill in the art, different forms of changes and modifications can be made on the basis of the description of this embodiment. Any changes or modifications that belong to the technical concept and inventive content of the present utility model and are obvious are also within the protection scope of the present utility model.
[0012] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a heating structure for an in-vehicle liquid crystal display screen, which can be applied to in-vehicle instruments, central controls, in-vehicle infotainment systems, rear seat entertainment systems, etc. It includes a bottom case 110, a liquid crystal module 120, a heating film 130, and a PCB board 140.
[0013] Both the liquid crystal module 120 and the PCB board 140 are disposed in the bottom case 110.
[0014] As Figure 1 shown, the liquid crystal module 120 sequentially includes a cover glass 121, a double-sided adhesive layer 122, an upper polarizer 123, a color film substrate 124, a color photoresist layer 125, an upper alignment layer 126, a liquid crystal layer 127, a lower alignment layer 128, an array layer 129, an array substrate 197, a lower polarizer 198, and a backlight unit 199 from top to bottom.
[0015] The backlight unit 199 has a temperature sensor 199a therein.
[0016] The heating film 130 is arranged below the backlight unit 199, its upper surface is in contact with the lower surface of the backlight unit 199, and its lower surface can be fixed to the inner surface of the bottom of the bottom case 110 through glue.
[0017] Among them, the heating film can be designed into any shape according to the internal layout of the bottom case 110, and it has holes or notches (not shown in the figure) for avoiding screw or dispensing areas.
[0018] As Figure 2As shown, both the PCB board 140 and the temperature sensor 199a are electrically connected to the controller 2 within the vehicle-mounted host. The PCB board 140 is electrically connected to the wiring port of the heating film 130.
[0019] When the controller 2 detects, via the temperature sensor 199a, that the temperature is less than 0°C, it causes the heating film 130 to heat the liquid crystal module 120 through the PCB board 140, raising the temperature of the liquid crystal layer and avoiding problems such as too slow / abnormal screen display or inability to display.
[0020] As can be seen from the above, for a vehicle-mounted liquid crystal screen heating structure provided by an embodiment of the present utility model, instead of arranging a heating layer in the liquid crystal module of the liquid crystal screen as in the prior art, a heating film is arranged below the backlight unit of the liquid crystal module to heat the entire liquid crystal module. This method has low cost and is convenient to implement. Moreover, since the heating film is not within the liquid crystal module, the electric field generated by its operation has no influence on the liquid crystal layer and its rotation.
[0021] Obviously, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present utility model and are not used to limit the present utility model. As long as within the scope of the substantial spirit of the present utility model, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present utility model.
Claims
1. A heating structure for an in-vehicle liquid crystal display screen, comprising a bottom case, a liquid crystal module and a PCB board. The liquid crystal module and the PCB board are both disposed in the bottom case. A temperature sensor is provided in a backlight unit of the liquid crystal module. The temperature sensor and the PCB board are both electrically connected to a controller, characterized in that, It further includes a heating film, which is arranged below the backlight unit, and its upper surface is in contact with the lower surface of the backlight unit. The heating film is electrically connected to the PCB board.
2. The heating structure of an in-vehicle liquid crystal display screen according to claim 1, characterized in that The lower surface of the heating film is fixed to the inner surface of the bottom of the bottom case.
3. The heating structure of an in-vehicle liquid crystal display screen according to claim 2, characterized in that, The heating film has apertures or notches for avoiding screw or dispensing areas.
4. A heating structure for an in-vehicle liquid crystal display screen according to claim 1, characterized in that, The liquid crystal module sequentially includes a cover glass, a double-sided adhesive layer, an upper polarizer, a color filter substrate, a color photoresist layer, an upper alignment layer, a liquid crystal layer, a lower alignment layer, an array layer, an array substrate, a lower polarizer, and a backlight unit from top to bottom.
5. The heating structure of an in-vehicle liquid crystal display screen according to claim 1, characterized in that, The controller is a controller within the vehicle-mounted host.