A demisting structure for a cover plate

Abstract

The utility model discloses a defogging structure for a cover plate, comprising: a cover plate, an ITO layer and a circuit board; the ITO layer is arranged on the bottom surface of the cover plate, the circuit board is arranged at the edge where the cover plate and the ITO layer are attached, the ITO layer itself can generate heat, a water mist sensor is arranged on the ITO layer, the water mist sensor is used to sense the amount of water mist on the cover plate, the circuit board is electrically connected to the ITO layer, when the amount of water mist on the cover plate reaches a threshold, the heat generated by the ITO layer is conducted to the cover plate for defogging. When the amount of water mist on the cover plate reaches a threshold, the heat generated by the ITO layer is conducted to the cover plate, so that the user can clearly see the display screen on the cover plate without the need for the user to wipe it manually, the ITO layer autonomously senses the amount of water mist on the cover plate, and determines whether the ITO layer needs to generate heat through the main program, so as to remove the water mist on the cover plate and ensure the user experience of the screen.

Description

Technical Field

[0001] The utility model relates to the field of cover plates, in particular to a demisting structure of a cover plate. Background Art

[0002] In winter or in high humidity, the glass surface of the touch screen and display screen is prone to condensation and fogging, which affects the driver's ability to view the map on the in-vehicle display screen or operate the in-vehicle touch screen during driving, is not conducive to the driver's driving, and reduces the driver's user experience. In complex vehicle conditions or on highways, it may even endanger the driver's life safety. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a demisting structure for a cover plate.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A demisting structure for a cover plate comprises: a cover plate, an ITO layer and a circuit board; the ITO layer is arranged on the bottom surface of the cover plate, the circuit board is arranged at the edge where the cover plate and the ITO layer are bonded, the ITO layer is a transparent metal, a water mist sensor is arranged on the ITO layer, the water mist sensor is used to sense the amount of water mist on the cover plate, the circuit board is electrically connected to the ITO layer, and when the amount of water mist on the cover plate reaches a threshold, the heat generated by the ITO layer is conducted to the cover plate for demisting.

[0006] In one embodiment, the water mist sensor is a plurality of capacitors.

[0007] In one embodiment, a thermistor is disposed on the circuit board, and the thermistor is electrically connected to the circuit board.

[0008] In one embodiment, the model of the thermistor is NCU15XH103F6SRC.

[0009] In one embodiment, the circuit board is an FPC.

[0010] In one embodiment, a steel sheet is provided on the FPC on the back side of the thermistor.

[0011] In one embodiment, a PAD is disposed on the FPC, and the PAD is electrically connected to the ITO layer.

[0012] In one of the embodiments, optical glue is further included, and the ITO layer and the cover plate are bonded together by the optical glue.

[0013] In one embodiment, the optical glue is OCA glue or OCR glue.

[0014] In one embodiment, the cover plate is a rectangular parallelepiped structure.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] The demisting structure of the cover plate of the utility model is provided by providing a cover plate, an ITO layer and a circuit board. The ITO layer is provided on the bottom surface of the cover plate, and the circuit board is provided at the edge where the cover plate and the ITO layer are bonded. The ITO layer is a transparent metal. When the circuit board is powered on, current is input into the ITO layer. According to Joule's law, the current will generate heat when passing through the ITO layer. A water mist sensor is provided on the ITO layer, and the water mist sensor is used to sense the amount of water mist on the cover plate. The circuit board is electrically connected to the ITO layer. When the amount of water mist on the cover plate reaches a threshold value, the heat generated by the ITO layer is conducted to the cover plate, so that the user can clearly see the display screen on the cover plate without the need for the user to wipe it manually. The ITO layer autonomously senses the amount of water mist on the cover plate, and determines whether the ITO layer needs to generate heat through the main program, so as to remove the water mist on the cover plate and ensure the user experience of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0018] Figure 1 It is a structural schematic diagram of a demisting structure of a cover plate in one embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of a circuit board in one embodiment of the utility model.

[0020] Reference numerals:

[0021] Cover plate 10 , ITO layer 20 , circuit board 30 , thermistor 40 , PAD 50 , optical adhesive 60 . DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0023] The present application proposes a defogging structure for a cover plate, comprising: a cover plate 10, an ITO layer 20 and a circuit board 30. Figure 1 and Figure 2, the ITO layer 20 is arranged on the bottom surface of the cover plate 10, and the circuit board 30 is arranged at the edge where the cover plate 10 and the ITO layer 20 are attached to fix the circuit board 30. A water mist sensor is arranged on the ITO layer 20, and the water mist sensor is used to sense the amount of water mist on the cover plate 10. The ITO layer 20 is a transparent metal. When the circuit board 30 is powered on, the current is input into the ITO layer 20. According to Joule's law, the current will generate heat when passing through the ITO layer 20. The heat generated by the ITO layer 20 can be conducted to the cover plate 10, so that the temperature in the cover plate 10 increases, and the water vapor is prevented from condensing into water mist on the surface of the cover plate 10 when it encounters the cold cover plate 10. Moreover, when the temperature on the cover plate 10 gradually rises through the ITO layer 20, the water mist originally condensed on the cover plate 10 will also accelerate vaporization. The circuit board 30 is electrically connected to the ITO layer 20. When the amount of water mist on the cover plate 10 reaches a threshold, the heat generated by the ITO layer 20 is transferred to the cover plate 10, so that the user can clearly see the display screen on the cover plate 10 without the need for the user to wipe it manually. The ITO layer 20 autonomously senses the amount of water mist on the cover plate 10 and determines whether the ITO layer 20 needs to generate heat through the main program to remove the water mist on the cover plate 10 and ensure the user experience of the screen. Preferably, the cover plate 10 is a rectangular parallelepiped structure, which conforms to the public's aesthetics and is conducive to displaying the screen.

[0024] It should be noted that the ITO layer 20 is a conductive transparent metal and does not affect the display effect of the screen. The thickness of the ITO layer 20 in the present application is 500 angstroms to 1000 angstroms, wherein the thickness is smaller than the ITO layer 20 in the prior art. Since the resistance value calculation formula can be obtained: when the material and length are constant, the cross-sectional area becomes smaller and the resistance becomes larger. According to Joule's law, at the same current and the same time, more heat is generated.

[0025] In one embodiment, the water mist sensor is a plurality of capacitors, which are electrically connected to each other. When water mist condenses on the surface of the cover plate 10, the voltage value parameter in the capacitor will change and deviate from the normal value. When the voltage value parameter in the capacitor reaches the threshold, the ITO layer 20 automatically heats the cover plate 10 to achieve the defogging effect. For further information, please refer to Figure 2 The circuit board 30 is provided with a thermistor 40, and the resistance change of the thermistor 40 is used to control the heat generation to prevent the ITO layer 20 and the cover plate 10 from being too high, causing burns and affecting the performance of the product. The thermistor 40 is electrically connected to the circuit board 30. Preferably, the model of the thermistor 40 is NCU15XH103F6SRC.

[0026] In another embodiment, the circuit board 30 is an FPC. Further, a steel sheet is provided on the back of the thermistor 40 on the FPC, and the steel sheet supports the component area and the locking and fixing area of ​​the FPC to provide support for the flexible FPC to prevent the FPC from bending. Further, a PAD50 is provided on the FPC, and the PAD50 is electrically connected to the ITO layer 20, wherein the PAD50 is electrically connected to the heating surface of the ITO layer 20, thereby reducing the use of wires, which are prone to aging of the outer layer of the wire glue when the temperature is high. In addition, the defogging structure of the cover plate 10 also includes an optical glue 60, which has good light transmittance. The ITO layer 20 and the cover plate 10 are bonded by the optical glue 60, which does not affect the display effect of the picture. Specifically, the optical glue 60 is an OCA glue or an OCR glue. In addition, in order to save power, when the mobile phone screen is on and the system senses that the ITO layer 20 is affected by a large area signal, the ITO layer 20 starts the heating function to defog.

[0027] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A demisting structure for a cover plate, characterized in that: include: Cover plate, ITO layer and circuit board; The ITO layer is arranged on the bottom surface of the cover plate, the circuit board is arranged at the edge where the cover plate and the ITO layer are attached, the ITO layer is a transparent metal, a water mist sensor is arranged on the ITO layer, the water mist sensor is used to sense the amount of water mist on the cover plate, the circuit board is electrically connected to the ITO layer, when the amount of water mist on the cover plate reaches a threshold, the heat generated by the ITO layer is conducted to the cover plate for demisting; the water mist sensor is a plurality of capacitors; a thermistor is arranged on the circuit board, the thermistor is electrically connected to the circuit board; the model of the thermistor is NCU15XH103F6SRC; the circuit board is an FPC, a steel sheet is arranged on the back of the thermistor on the FPC; a PAD is arranged on the FPC, the PAD is electrically connected to the ITO layer; it also includes optical glue, the ITO layer and the cover plate are bonded by the optical glue; the optical glue is OCA glue or OCR glue; the cover plate is a rectangular parallelepiped structure.

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