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Touch display device, driving circuit and driving method

A touch display and drive circuit technology, applied in the direction of electrical digital data processing, instruments, data processing input/output process, etc., can solve problems such as touch detection interference, achieve the effect of reducing interference and improving accuracy

Pending Publication Date: 2020-03-10
SHENZHEN FOCALTECH SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of the above parasitic capacitance brings interference to the touch detection

Method used

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  • Touch display device, driving circuit and driving method
  • Touch display device, driving circuit and driving method
  • Touch display device, driving circuit and driving method

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Embodiment Construction

[0061] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0062] In order to solve the problems mentioned in the background technology, the present invention provides a touch display device, referring to Figure 5 , shows a schematic diagram of an embodiment of the touch display device of the present invention. The touch display device includes:

[0063] The first substrate (not shown in the figure) is used as a glass substrate on the color filter (Color Filter, CF) side.

[0064] The second substrate 111 is used as a glass substrate on the thin film transistor (Thin Film Transistor, TFT) side, and the second substrate 111 is arranged opposite to the first substrate.

[0065] A plurality of gate lines G1 , G2 . . . GM, a plurality of data lines S1 , S2 . The drain of the thin film transistor 1...

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PUM

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Abstract

The invention provides a touch display device, a driving circuit and a driving method. The touch display device includes: a common electrode located between the first substrate and the second substrate and serving as a touch sensing electrode in a touch sensing stage; a driving circuit which is used for providing a first signal for realizing touch detection for the common electrode in a touch sensing stage; the driving circuit is further used for providing a second signal for the gate lines in the touch sensing stage, or the driving circuit is further used for providing the second signal for the gate lines in the touch sensing stage and providing a third signal in the touch sensing stage, wherein the second signal enables the thin film transistor to be in an off state, and meanwhile, the charging and discharging electric quantity of a capacitor formed by a common electrode and a gate line can be reduced; the third signal can reduce the charging and discharging electric quantity of a capacitor formed by the common electrode and the data line. The invention further provides a corresponding driving circuit and a driving method. Interference of stray capacitance on touch detection canbe reduced, and the precision of touch detection is improved.

Description

[0001] This application claims the priority of the domestic application filed with the China Patent Office on August 31, 2018, with application number 201811015427.3, and the title of the invention is "touch display device, driving circuit and driving method", the entire content of which is incorporated by reference in this application . technical field [0002] The present invention relates to the field of touch technology, in particular to a touch display device, a driving circuit and a driving method. Background technique [0003] As an input medium, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. [0004] refer to figure 1 , shows a prior art liquid crystal display device with an in-cell touch panel (In-cell touch panel), the liquid crystal display device includes: a thin film transistor (TFT, Thin Film Transistor) substrate 1, a liquid crystal layer ( Liquid Crystal) 2 and a color filter (CF, Color Filter) sub...

Claims

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Application Information

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IPC IPC(8): G06F3/041
CPCG06F3/0412G06F3/0418
Inventor 刘卫平萧培宏刘军桥蒋新喜
Owner SHENZHEN FOCALTECH SYST