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A method for improving the sensitivity of capacitive touch screen

A capacitive touch screen, touch screen technology, applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problems of low sensitivity of touch screen, inconvenient use of users, etc., to improve the dielectric constant and improve operation sensitivity The effect of degree and signal-to-noise ratio

Active Publication Date: 2017-01-04
贵阳嘉瑜光电科技咨询中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter what kind of touch method is used for capacitive touch screen, the touch screen needs to have high sensitivity. The sensitivity of the touch screen in the prior art is not high, which brings inconvenience to the user.

Method used

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  • A method for improving the sensitivity of capacitive touch screen
  • A method for improving the sensitivity of capacitive touch screen
  • A method for improving the sensitivity of capacitive touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] refer to figure 1 As shown, the integration mode of the capacitive touch screen and the LCD functional layer in this embodiment is independent of each other. The OTO layer of the touch screen is stacked in different layers separated by insulating materials on the same surface of the substrate. Specifically, the capacitive touch screen module 101 is included. And the LCD display module 102, the capacitive touch screen module 101 includes the ITO multi-point sensing layer 103 of the touch screen, the ITO driving line layer 104 of the touch screen, and the LCD display module 102 includes the common electrode voltage layer (Vcom) 105 of the LCD display module. The panel material of the touch screen in this embodiment is a pure Al2O3 sapphire sheet, the crystal plane is the A side, and the thickness is 0.1mm. The dielectric constant of the sapphire sheet in this example is measured by the resonance method to be 8, and the panel sensitivity coefficient formula is adopted: Th...

Embodiment 2

[0035] refer to figure 2 As shown, the integration mode of the capacitive touch screen and the LCD functional layer in this embodiment is a partial integration mode, and the OTO layer of the touch screen is stacked on different sides of the same substrate of the substrate. Specifically, the capacitive touch screen module 201 and the LCD display module 202 are included. , The capacitive touch screen module 201 includes the ITO multi-point sensing layer 203 of the touch screen, and the touch screen and LCD common layer 204, whose function is the driving layer of the touch screen is also the common electrode voltage layer (Vcom) of the LCD module. The panel material of the touch screen in this embodiment is carbon-doped Al2O3 sapphire sheet, the crystal plane is the M plane, and the thickness is 1mm. The lamination mode of the 2-layer ITO layer of this touch screen is the same substrate with different faces, and the resonance method is used to measure in this example. The dielec...

Embodiment 3

[0037] refer to image 3 As shown: the capacitive touch screen and LCD functional layer integration mode in this embodiment is a fully integrated mode, specifically, including a fully integrated module 301 between the touch screen module and the LCD module, and the integrated module 301 includes the sensing layer of the touch screen and the common electrode of the LCD module The common layer 302 of the voltage layer (Vcom) and the driving layer 303 of the touch screen, wherein the driving layer 303 of the touch screen is placed under the bottom glass substrate. The panel material of the touch screen in this embodiment is Mg-doped Al2O3 sapphire sheet, the crystal plane is the C plane, and the thickness is 3mm. The stacking method of the 2-layer ITO layer of the touch screen is different substrates and different layers. The resonance method is used to measure this example. The dielectric constant of the medium sapphire sheet is 100, and the panel sensitivity coefficient formula...

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Abstract

The invention discloses a method for improving sensitivity of a capacitive touch screen. The capacitive touch screen comprises a surface capacitive touch screen and a projection capacitive touch screen. A transparent high-dielectric constant material is used as a panel material of the capacitive touch screen, and used for improving the operation sensitivity and the signal to noise ratio of the capacitive touch screen, wherein the high-dielectric constant material can be a mono-crystal material, a multi-crystal material or an amorphous material, and the dielectric constant of the mono-crystal material can be improved by changing crystal orientation or adding a dopant. According to the method disclosed by the invention, the transparent high-dielectric constant material is used as the panel material of the capacitive touch screen, and the dielectric constant is improved through a method of changing the crystal orientation or adding the dopant, and further, the operation sensitivity and the signal to noise ratio of the capacitive touch screen are effectively improved.

Description

technical field [0001] The invention relates to the technical field of capacitive touch screens, in particular to a method for improving the sensitivity of a capacitive touch screen. Background technique [0002] Capacitive touch screen is an input device that improves the human operation interface. It has the advantages of intuition, simplicity and speed. Capacitive touch screen has been widely used in many electronic products, such as mobile phones, PDAs, multimedia, public information query systems, etc. [0003] Capacitive touch screens are divided into single-point and multi-point touch screens. Surface capacitive touch screens can only achieve single-point control. Projected capacitive touch screens are multi-point capacitive touch screens. Projected capacitive touch screens can be divided into self-capacitance touch screens and mutual capacitance touch screens. The capacitance of the self-capacitance touch screen is the parasitic capacitance relative to the ground. Wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 季泳
Owner 贵阳嘉瑜光电科技咨询中心