Liquid crystal display (LCD) panel and touch detection method thereof

Abstract

The invention provides a liquid crystal panel, which comprises a plurality of scanning lines, a plurality of data lines, a plurality of induction lines, a plurality of display units and a plurality of push units. Each push unit comprises a first push lower electrode, a thin film transistor, a second push lower electrode and a push switch. When a switch is pushed, the first push lower electrode is electrically connected with the second push lower electrode. The invention also provides a touch detection method, comprising the steps of staring the scanning lines; electrically connecting pixels to a detection circuit; and comparing an input voltage with a threshold voltage, and sending out a touch signal by the detection circuit to present that the display unit is pushed. By using the liquid crystal panel of the invention, an ITO conductive layer only needs to be formed on the top surface of a photo-resistant spacer, which has no requirement on climbing capacity of the ITO material on the side wall thereof, thus simplifying manufacture technology. In addition, the detection method based on touch control can greatly reduce the number of the detection lines and TFT, and improve pixel aperture ratio of the liquid crystal panel.

Description

technical field [0001] The invention relates to a liquid crystal panel, in particular to a liquid crystal panel with functions of pressing detection and image display. Background technique [0002] At present, with the development of semiconductor technology and manufacturing process, thin film transistor liquid crystal display (TFT-LCD) with superior performance such as high quality, low power consumption, no radiation and small size has gradually become the mainstream of the market. [0003] Typically, a liquid crystal panel includes: an array substrate, a color filter substrate and a layer of liquid crystal molecules distributed between the array substrate and the color filter substrate. More specifically, there are a plurality of pixels defined by intersection positions of data lines and corresponding scan lines on the array substrate, and a pixel driving circuit for driving these pixels is composed of a plurality of electronic components. Generally, the color filter su...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned liquid crystal panel, a continuous transparent conductive film layer is sputtered on the surface of the filter substrate and the photoresist spacer, so as to ensure that the voltage potential obtained by the sensor when the display unit is pressed is consistent with that on the filter substrate. The voltage and potential of the photoresist spacer are equal, that is to say, the side wall of the photoresist spacer must be plated with an ITO conductive layer, which will inevitably bring about the stability and complexity of the manufacturing process.

In addition, when the filter substrate is electrically connected to the common electrode, the system can only use DC power, which increases the power consumption of the system

This is because once the AC power is applied, when the liquid crystal panel is pressed, the sensor is electrically connected to the ITO layer of the filter substrate through the photoresist spacer, and the voltage obtained on the sensor will be very unstable.

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