Liquid crystal display device with built-in touch device

Abstract

The invention provides a liquid crystal display device with a built-in touch device. The liquid crystal display device comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate is provided with a scanning line, a data line and a plurality of pixel units; each pixel unit comprises three pixel subunits; each pixel subunit is provided with a film crystal switch and a pixel electrode; the second substrate is provided with a conductive PS; one pixel subunit is internally provided with a microswitch, a Y-sensor line which is parallel to the data line and is positioned in the same layer together with the data line, and a conductive PAD; the microswitch comprises a grid electrode connected with the scanning line, a source electrode connected with the Y-sensor line and a drain electrode connected with the conductive PAD; and the conductive PAD is opposite to the conductive PS. According to the liquid crystal display device provided by the invention, an existing press resistance-type built-in touch device is improved, defects of such devices at present are overcome, the aperture opening ratio of pixels is improved, a press resistance-type built-in touch technology can be applied to large-size panels, and the driving circuit of the touch device is simplified.

Description

technical field [0001] The invention relates to a liquid crystal display device with built-in touch control. Background technique [0002] The development direction of touch technology is low cost, high yield, large size, high reliability and so on. In order to achieve this goal, in terms of process technology, ITO Sensor, Cover lens and even TFT can be integrated together to reduce production costs, make the thickness thinner, and avoid the problem of poor bonding. In terms of material technology, organic or inorganic alternative materials for ITO can be developed, flexible film and substrate technology can be mastered, or new plastic materials can be used on Cover Lens materials to replace more expensive reinforced glass or PMMA plastic plates. In terms of structure technology, built-in touch structures such as On-Cell and In-Cell have been developed. [0003] The In-Cell structure has high integration and low pass rate, and the overall thickness of the touch device is t...

AI Technical Summary

Problems solved by technology

[0005] The existing implementations of resistive In-Cell touch technology shown in Figure 2(a) and Figure 2(b) have the following disadvantages: low pixel aperture ratio, limited application product size, complex control circuits and patent restrictions

[0008] The control circuit is complicated because it needs independent driving circuit and scanning circuit; the circuit principle is similar to Stantum digital resistive touch technology, and the control circuit is protected by Chinese patent CN100447723C

Images