A touch display device and a touch detection circuit

A touch display and touch detection technology, which is applied in the input/output process of electrical digital data processing, instruments, and data processing, etc., can solve the problems of low touch detection accuracy, achieve simple structure, reduce interference, and reduce the amount of charge and discharge. Effect

Pending Publication Date: 2019-03-15
CHIPONE TECH BEIJINGCO LTD
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  • Abstract
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Problems solved by technology

[0002] As an input medium, the touch screen is currently the most simple, convenient and natural way of human-computer interaction, in which, each electrode unit in the common electrode in the touch screen is connected to the driver chip through the electrode connection line so that the driver chip realizes each The time-sharing drive of the electrode unit, however, in the touch detection stage, due to the formation of parasitic capacitance between the electrode units, the touch detection accuracy during touch detection is low

Method used

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  • A touch display device and a touch detection circuit
  • A touch display device and a touch detection circuit
  • A touch display device and a touch detection circuit

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Embodiment Construction

[0038] First, if figure 1 As shown, it is a touch display device with an in-cell touch panel (In-Cell TouchPanel) in the prior art, and the touch display device includes a color filter (Color Filter, CF) substrate, a TFT (ThinFilm Transitor, thin film transistor ) substrate and a liquid crystal layer (Liquid Crystal), wherein the TFT substrate includes a first glass substrate and a thin film transistor located on the first glass substrate, and the CF substrate includes a common electrode, a color filter, and a second glass substrate. In the display stage of the touch display device, the liquid crystal display drive circuit will turn on the thin film transistors row by row through the gate line G, and the data line S will provide pixel voltage to the pixel electrode of each sub-pixel when the gate line G turns on the thin film transistor, and the common electrode The pixel voltage will be applied on it. Such as figure 2 As shown, wherein an equivalent capacitance Clc is form...

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Abstract

The embodiment of the invention provides a touch display device and a touch detection circuit, which relate to the technical field of touch detection. Wherein the electrode unit not detected in the touch display device is connected to a second driving circuit through a detection switch, so that the charge and discharge amount of the parasitic capacitance formed between the detected electrode unitand the undetected electrode unit is reduced or even eliminated, thereby reducing the interference of the parasitic capacitance on the touch detection and improving the touch detection accuracy.

Description

technical field [0001] The present invention relates to the technical field of touch detection, in particular to a touch display device and a touch detection circuit. Background technique [0002] As an input medium, the touch screen is currently the most simple, convenient and natural way of human-computer interaction, in which, each electrode unit in the common electrode in the touch screen is connected to the driver chip through the electrode connection line so that the driver chip realizes each The time-sharing driving of the electrode units, however, in the touch detection stage, due to the formation of parasitic capacitance between the electrode units, the touch detection accuracy during touch detection is low. Contents of the invention [0003] In view of this, the present invention provides a touch display device and a touch detection circuit, which can effectively solve the above problems and improve the accuracy of touch detection. [0004] In one aspect, a pref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0412G06F3/0418G06F3/044
Inventor 曲孔宁杨毓俊
Owner CHIPONE TECH BEIJINGCO LTD
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