Built-in touch screen and driving method thereof, and display device

Abstract

The invention discloses a built-in touch screen and a driving method thereof, and a display device. During a touch control period, a touch control starting signal line is used for controlling turning on of a first switch transistor, so that a touch control scanning signal outputted by a drive chip is transmitted to the touch control starting signal line through a gate signal line or a data signal line so as to realize the touch control function. During a display period, the first switch transistor is controlled to be turned off by the touch control starting signal line, so that a gate scanning signal or gray-scale signal outputted by a drive chip is transmitted at the gate signal line or the data signal line to realize the display function. Therefore, with the first switch transistor and the touch control starting signal line, the touch control scanning signal and the display signal are transmitted by the gate signal line or the data signal line in a time-sharing manner, so that the wiring number of the fan-out area is reduced and thus the pin number corresponding to the wiring of the fan-out area is reduced and thus the quality of the built-in touch screen is enhanced and the manufacturing cost is lowered.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an embedded touch screen, a driving method thereof and a display device. Background technique [0002] With the rapid development of display technology, touch screen panels (Touch Screen Panels) have gradually spread in people's lives. According to the composition and structure, touch screens can be divided into: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel. Specifically, the plug-in touch screen is produced separately from the touch screen and the liquid crystal display (LCD), and then bonded together to form a display screen with touch function; the surface-covered touch screen is the touch electrode of the touch screen It is arranged between the opposite substrate of the display screen and the polarizer; in the embedded touch screen, the touch electrodes of the touch screen are arranged inside the display screen. Among them, the built-in touch scree...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above description that in the existing in-cell touch screen, the touch signal and the display signal are processed separately, and in the prior art, the source driver chip and the touch detection chip or the gate driver chip and the touch detection chip are generally combined. The touch detection chip is integrated on a driver chip, and the signal output pin (Pin) including the data signal line and the touch scanning signal line or the gate signal line and the touch scanning signal line is arranged on the driver chip, by This leads to a significant increase in the number of pins compared to the number of pins of a non-touch display, resulting in higher production costs

In addition, taking the integration of the source driver chip and the touch detection chip on a driver chip as an example, since the driver chip implements signal loading to the pixel electrodes through the data signal lines in the Therefore, compared with the non-touch display screen, the number of wiring in the fan-out area of ​​the in-cell touch screen will also be greatly increased, which will lead to the light transmittance of the fan-out area Decrease, the UV curing effect of the sealing glue becomes worse, which affects the quality of the embedded touch screen

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