Touch device and touch driving method

Abstract

The invention discloses a touch device and a touch driving method which are used for realizing that the touch device works at a higher refresh rate in a non-touch state. The touch device comprises a touch panel, a time sequence controller, a touch control controller, a controller and a sensor, wherein the sensor is used for detecting whether an object which contacts with or is close to the touch panel exists or not; when the object which contacts with or is close to the touch panel does not exist, a first indication signal is output to the controller; when the object which contacts with or is close to the touch panel exists, a second indication signal is output to the controller; the controller is used for receiving the first indication signal so as to control the touch control controller not to work, and controlling the time sequence controller to output a first scanning signal; the controller is also used for receiving the second indication signal to control the time sequence controller to output a second scanning signal, and controlling the touch control controller to start working; the scanning frequency of the first scanning signal is higher than the scanning frequency of the second scanning signal; moreover, the first scanning signal and the second scanning signal are both display scanning signals of the touch panel.

Description

technical field [0001] The invention relates to the technical field of displays, in particular to a touch device and a touch driving method. Background technique [0002] Compared with the traditional external capacitive touch screen structure, the in-cell capacitive touch screen in the prior art can save a touch substrate and make the whole display module lighter and thinner. The schematic diagram of the structure of the liquid crystal display screen with in-cell touch technology is as follows: figure 1 As shown, the touch driving electrodes (Tx) and touch sensing electrodes (Rx) are fabricated on the glass substrate on the array substrate side of the liquid crystal display panel, wherein the Tx line is shared with the common electrode (Vcom) line, and the in-cell structure Various parasitic capacitances and coupling capacitances will be generated between the capacitive touch screen Tx and Rx and the thin film transistor (Thin Film Transistor, TFT) display device. Gate1, G...

AI Technical Summary

Problems solved by technology

When t is small, the scanning of Tx and Rx will not be completed, so it is necessary to increase t appropriately. At present, the direct way to increase t is to increase the scanning time of one frame, but this means reducing the frame rate and will affect the screen display. effect, there are problems such as flickering and smearing

[0005] In summary, due to the time-sharing driving method used in the prior art in-cell touch technology LCD screen, the LCD screen cannot work at a higher refresh rate when not being touched.

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