Heating structure for liquid crystal display screen of electronic rearview mirror

Abstract

A liquid crystal display screen heating structure of an electronic rearview mirror comprises a backlight unit, a liquid crystal panel module and a heating module, the liquid crystal panel module is arranged above the backlight unit, the heating module is attached to the lower side or the upper side of the liquid crystal panel module, the heating module comprises a PET base material, a heating layer, an electrode and an optical plating layer, the heating layer is attached to the lower side of the PET base material, and the heating layer is attached to the lower side of the PET base material. The electrode is arranged on the edge of the heating layer. The optical coating is arranged on the lower side of the heating layer. The heating module is attached to the upper side of the liquid crystal panel module, and the touch control module is attached to the upper side of the heating module. The heating layer is made of indium tin oxide or nano-silver materials. Under the condition of low temperature, the heating layer is electrified through the electrode, and the temperature around the liquid crystal can be rapidly increased to the room temperature through heating according to the resistance heating principle, so that the liquid crystal can work normally, the condition of high delay is prevented, and potential safety hazards are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to physical field especially, relates to electronic rear -view mirror, and particularly is a kind of electronic rear -view mirror liquid crystal display screen heating structure. BACKGROUND

[0002] CMS (Camera-Monitor System) is electronic rear -view mirror, and it is indirect field of vision device used to replace traditional rear -view mirror on vehicle.With the emergence of new technologies such as intelligent networking, automatic driving and ADAS, vehicles are rapidly developing towards electronic and intelligent direction, and in the future, traditional rear -view mirror will be replaced by electronic rear -view mirror, and the combination of camera and monitor will be used to solve the rear -view problem.Using camera monitor system (CMS) to replace the rear -view mirror installed according to standard mandatory provisions helps to reduce the air resistance of vehicle, reduce the visual blind area and improve the visual performance in harsh environment.CMS includes a camera for capturing field of view and sending signals to electronic control unit (ECU) for further processing, and then using monitor to provide field of view for driver.

[0003] CMS needs to react quickly, and liquid crystal display screen, as the main display device of CMS, has the advantages of low cost and stable performance, but due to the slow reaction speed of liquid crystal at low temperature, the delay of liquid crystal display screen in displaying picture under low temperature environment is high, which has safety hazard.The reaction time of liquid crystal at different temperatures: the reaction time at 23 DEG C is 22ms;The reaction time at-20 DEG C is 180ms;The reaction time at-30 DEG C is 400ms.If the reaction time of liquid crystal is greater than 33ms, there will be display abnormalities such as tailing, and under low temperature condition, the reaction time of display screen is 180ms or even 400ms, which cannot display picture normally. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of electronic rear -view mirror liquid crystal display screen heating structure, and the electronic rear -view mirror liquid crystal display screen heating structure solves the technical problem that CMS liquid crystal display screen in prior art cannot normally display picture at low temperature.

[0005] The utility model relates to a kind of electronic rear -view mirror liquid crystal display screen heating structure, including backlight unit, liquid crystal panel module, heating module, liquid crystal panel module is set in the top of backlight unit, heating module is attached in the downside or upside of liquid crystal panel module, heating module includes PET base material, heating layer, electrode, optical plating layer, heating layer is attached in the downside of PET base material, electrode is set in the edge of heating layer, optical plating layer is set in the downside of heating layer.

[0006] Further, the heating module is attached to the upper side of the liquid crystal panel module, and the touch module is attached to the upper side of the heating module.

[0007] Further, the heating layer is made of indium tin oxide or nano silver material.

[0008] Further, the temperature sensor for measuring the ambient temperature is connected to the output end of the temperature sensor and the control end of the heating layer. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a schematic view of one embodiment of the electronic rearview mirror liquid crystal display screen heating structure of the utility model.

[0010] Figure 2 It is a schematic view of the heating module in the electronic rearview mirror liquid crystal display screen heating structure of the utility model.

[0011] Figure 3 It is a schematic view of another embodiment of the electronic rearview mirror liquid crystal display screen heating structure of the utility model.

[0012] Figure 4 It is a temperature-time curve schematic view of the heating film in the electronic rearview mirror liquid crystal display screen heating structure of the utility model. DETAILED DESCRIPTION

[0013] The utility model is further described below in combination with embodiments, but the utility model is not limited to the embodiments, and any similar changes of the utility model should be included in the protection scope of the utility model. The use of the directions such as up, down, front, back, left, right, middle, inside and outside in the utility model is only for the convenience of clear description, and not for the limitation of the technical scheme of the utility model.

[0014] As shown in Figures 1-4 The utility model discloses an electronic rearview mirror liquid crystal display screen heating structure, including backlight unit 1 (BLU), liquid crystal panel module 2 (FOG), heating module 3, liquid crystal panel module 2 is arranged at the upper side of backlight unit 1, heating module 3 is attached to the lower side or the upper side of liquid crystal panel module 2, and heating module 3 includes PET base material 7, heating layer 5, electrode 6, optical plating 4, heating layer 5 is attached to the lower side of PET base material 7, electrode 6 is arranged at the edge of heating layer 5, and optical plating 4 is arranged at the lower side of heating layer 5.

[0015] Further, the heating module 3 is attached to the upper side of the liquid crystal panel module 2, and the touch module 8 is attached to the upper side of the heating module 3.

[0016] Further, the heating layer 5 is made of indium tin oxide (ITO) or nano-silver material.

[0017] Further, a temperature sensor for measuring ambient temperature is further included, and the output end of the temperature sensor and the control end of the heating layer 5 are connected with the vehicle-mounted controller.

[0018] Specifically, the specific structure and principle of the backlight unit 1, the liquid crystal panel module 2, the PET substrate 7, the heating layer 5, the electrode 6, the optical coating 4, the touch module 8, the temperature sensor and the vehicle-mounted controller in the utility model and other unexplained places all adopt the known scheme in the prior art, and those skilled in the art are all aware of it, which will not be repeated here.

[0019] The backlight unit 1 is used for providing uniform backlight, and generally includes a light guide plate, a reflective film, a diffusion film and the like optical film.

[0020] PET is polyethylene terephthalate. ITO or nano-silver is plated on the PET substrate 7 as the heating layer 5, and ITO and nano-silver have the characteristics of high transmittance and fast heating speed, and can be attached to the upper and lower surfaces of the liquid crystal panel module 2, and is preferably attached to the lower surface of the liquid crystal panel module 2, as shown in the figure, which can reduce the reflectivity. Figure 1

[0021] The upper side of the PET substrate 7 of the heating module 3 can be made into a touch pattern to form a touch module 8, and the touch module 8 and the heating layer 5 form a touch and heating two-in-one film, as shown in the figure. Figure 3 The touch and heating two-in-one film is attached to the upper surface of the liquid crystal panel module 2, and in the case of low temperature, the electrode 6 is powered on to the heating layer 5, and the liquid crystal surrounding temperature can be quickly raised to room temperature through the principle of resistance heating, so that the liquid crystal can work normally, preventing the occurrence of delayed high situation and reducing the security risk.

[0022] The heating effect of the heating layer 5 is different at different impedances and different voltages, and for example, 18V and 24Ω, the temperature-time curve is as shown in the figure. Figure 4 Through the heating of the heating layer 5, the liquid crystal surrounding temperature is raised to 23℃ after 10s at-30℃, and the liquid crystal can work normally at this temperature with a reaction time of 22ms. The liquid crystal surrounding temperature can reach 23℃ after about 7s at-20℃, and the liquid crystal can work normally.

[0023] ​Manufacturing process: first, vapor deposition or printing ITO or nano-silver on the PET substrate 7. In the surface of the heating layer 5, make optical plating 4, improve the optical effect and play the role of protection. Then, the heating module 3 and liquid crystal panel module 2 are optically attached.

[0024] Method of use: use NTC temperature sensor to measure the ambient temperature, under the control of the vehicle controller, if the ambient temperature is lower than 0℃, through the electrode 6 to the heating layer 5 power supply, using periodic power supply mode, control the temperature between 10-30℃.

Claims

1. An electronic rearview mirror liquid crystal display screen heating structure, characterized by, The application relates to a backlight unit, a liquid crystal panel module and a heating module, wherein the liquid crystal panel module is arranged above the backlight unit, the heating module is attached to the lower side or the upper side of the liquid crystal panel module, the heating module comprises a PET base material, a heating layer, an electrode and an optical plating layer, the heating layer is attached to the lower side of the PET base material, the electrode is arranged at the edge of the heating layer, and the optical plating layer is arranged at the lower side of the heating layer.

2. The heating structure of the liquid crystal display screen of an electronic rearview mirror according to claim 1, wherein, The application further comprises a touch module, the heating module is attached to the upper side of the liquid crystal panel module, and the touch module is attached to the upper side of the heating module.

3. The heating structure of the liquid crystal display screen of an electronic rearview mirror according to claim 1, wherein, The heating layer is made of indium tin oxide or nano-silver material.

4. The liquid crystal display screen heating structure for an electronic rearview mirror according to claim 1, wherein The application further comprises a temperature sensor for measuring the ambient temperature, and the output end of the temperature sensor and the control end of the heating layer are connected with a vehicle-mounted controller.

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