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Touch display device

A touch display device, touch display panel technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., can solve the problem of low stability and reliability, malfunction, signal reading error, etc. problems, to avoid misoperation, and to achieve the effect of high reliability

Active Publication Date: 2011-05-25
INNOCOM TECH SHENZHEN +1
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the liquid crystal display panel generally adopts an inversion driving method, and the polarity of the common voltage applied to its common electrode is constantly changing. Due to the existence of the liquid crystal capacitor, the touch sensing line transmits the sensing signal to the corresponding control circuit It will be affected by the common voltage when reading the same induction signal at different time intervals, which may result in different results, resulting in signal reading errors, and then causing malfunctions
Therefore, the stability and reliability of the in-cell touch display device in the prior art are relatively low

Method used

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Embodiment Construction

[0025] see figure 1 , which is a schematic circuit diagram of the first embodiment of the touch display device of the present invention. The touch display device 100 is an in-cell touch display device, which includes a touch display panel 110 , a scanning driving circuit 120 , a data driving circuit 130 , a signal processing circuit 140 and a control circuit 150 .

[0026] The touch display panel 110 may be a liquid crystal display panel, which includes m+1 scanning lines G0-Gm arranged in parallel, n data lines D1-Dn parallel to each other and vertically insulating and intersecting the scanning lines G0-Gm, and m×n pixel units Pij defined by the scanning lines G1-Gm and data lines D1-Dn and distributed in a matrix (where i and j respectively indicate that the pixel units are located in the i-th row and j-th column of the matrix , 1≤i≤m, 1≤j≤n). Each pixel unit Pij includes a thin film transistor 111 and a pixel electrode 112 respectively. Wherein, the gate of the thin film...

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Abstract

The invention provides a touch display device. The device comprises a touch display panel and a signal processing circuit, wherein the touch display panel comprises a plurality of scan lines, a plurality of data lines, a plurality of pixel units and a public electrode layer; the plurality of pixel units form a plurality of touch sensing units each of which comprises a touch sensing element, the touch sensing element is connected to the corresponding scan line on the one hand, and is connected to the signal processing circuit through the touch sensing line on the other hand so as to provide a touch sensing signal to the signal processing circuit when the touch sensing element is touched by external force; a public voltage signal is applied to the public electrode layer, is a polarity reversal signal, and comprises a first polarity and a second polarity opposite to the first polarity; and when high voltage is applied to the scan line connected with the touch sensing element, and the public voltage signal of the public electrode layer is the first polarity, the signal processing circuit reads the signal on the touch sensing line.

Description

technical field [0001] The present invention relates to a touch display device, in particular to an in-cell touch display device. Background technique [0002] With the vigorous development of flat panel display technology and the reduction of manufacturing costs, flat panel display devices with advantages such as low radiation, small thickness, and low power consumption are more and more favored by consumers, so they are widely used in electronic products, such as Mobile phones, game consoles, handheld computers, etc. Generally speaking, flat panel display devices mainly include plasma display devices (PDP), liquid crystal display devices (LCD) and organic light emitting diode display devices (OLED). Among them, the liquid crystal display device has gradually become the mainstream flat-panel display device in the market due to its relatively low cost. [0003] In order to meet the needs of modern people for a more convenient and intuitive human-machine interface, various ...

Claims

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Application Information

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IPC IPC(8): G06F3/041
Inventor 施博盛
Owner INNOCOM TECH SHENZHEN
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