Embedded capacitance type liquid crystal touch screen

Abstract

The invention provides an embedded capacitance type liquid crystal touch screen, which comprises a transparent glass substrate layer, an indium tin oxide (ITO) layer, a colorful filter layer, a liquid crystal layer, a thin film transistor (TFT) active matrix layer, a backlight module, a polarizer layer, a complanation layer and a passivation layer. The touch screen is characterized in that: a capacitance type touch sensing module is completely embedded in a liquid crystal display module; two pixel electrodes are introduced to form a sensing liquid crystal capacitor and a storage capacitor with a corresponding sensing liquid crystal capacitor line and a storage capacitor line respectively; and through the circuit design of the thin film transistor in a touch sensing unit, a second indium tin oxide (ITO) layer and a Vcom of a display module are arranged in the same layer, and circuit interference and noise generated by embedding the liquid crystal display module in the touch module and arranging the second indium tin oxide (ITO) layer and the Vcom of the display module in the same layer are eliminated. By the embedded capacitance type liquid crystal touch screen, the structure is simplified, the transmission rate is improved, and circuits of the colorful filter and the liquid crystal display module are not required to be reconstructed.

Description

Technical field: [0001] The invention relates to an embedded capacitive liquid crystal touch screen, which belongs to the technical field of liquid crystal displays. Background technique: [0002] Touch technology has brought people a more humanized human-computer interaction operation mode, and has gradually become a mainstream control technology. Since the invention of touch screen technology in the 1970s, after more than 40 years of development, touch screen technology can be roughly divided into four categories according to the type of sensor: capacitive, resistive, infrared, and acoustic wave. Point touch, precise positioning, long service life and other advantages have already occupied most of the current touch market share. At present, most of the capacitive touch screens adopt a plug-in structure. The touch panel and the display panel of the plug-in structure are two relatively independent devices, and the two devices are assembled by directly stacking them up and d...

AI Technical Summary

Problems solved by technology

This method of directly attaching the touch panel to the display panel inevitably adds the thickness and weight of the touch panel to the display, which is not in line with the trend of thinner and lighter displays in the market. At the same time, the number of layers of the touch panel More, it will cause a decrease in light transmittance, which will seriously affect the display effect of the display

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