Touch screen, liquid crystal display device and driving method of touch screen

A driving method and a touch screen technology are applied in the touch screen, liquid crystal display device and the driving field of the touch screen, and can solve the problems of inaccurate detection of the touch point position.

Active Publication Date: 2010-10-20
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above-mentioned touch screen structure, the parasitic capacitance of the signal line to the common electrod

Method used

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  • Touch screen, liquid crystal display device and driving method of touch screen
  • Touch screen, liquid crystal display device and driving method of touch screen
  • Touch screen, liquid crystal display device and driving method of touch screen

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Example Embodiment

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar popularizations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

[0034] Aiming at the problem that the parasitic capacitance of the signal line to the common electrode will have a considerable impact on the detection result, which makes the detection of the position of the touch point inaccurate, the inventor has researched and found that: taking a 2...

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Abstract

The invention discloses a touch screen, a liquid crystal display device and a driving method of the touch screen. The touch screen comprises a display panel, wherein the display panel comprises a first baseplate and a second baseplate, wherein the first baseplate and the second baseplate are oppositely placed, and the second baseplate is provided with a plurality of groups of public electrode wires; a data driving circuit is connected with a data wire and used for supplying a display data driving signal for the data wire in a display mode; a grid driving circuit is connected with a grid wire and used for supplying a display grid driving signal for the grid wire in the display mode and supplying a touch grid driving signal for the grid wire in a touch mode; a public electrode signal generating circuit is connected with the public electrode wire and used for supplying a display public electrode signal for the public electrode wire in the display mode; and a touch driving circuit is connected with the data wire and the public electrode wire and used for supplying the same touch driving signal for the data wire and the public electrode wire in the touch mode, thereby improving the detection accuracy on the touch point position on the touch screen.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, in particular to a touch screen, a liquid crystal display device and a driving method for the touch screen. Background technique [0002] At present, touch screens are widely used in digital products such as ATM machines and POS retail machines. Generally, touch screens include capacitive touch screens and resistive touch screens. [0003] Such as figure 1 Shown is a circuit equivalent diagram of an existing capacitive touch screen, which includes two layers of ITO (indium tin oxide) layers, and the upper ITO layer is a common electrode 11, which is used as a touch working layer in touch mode. It is used to touch and receive touch signals; the lower ITO layer is the shielding layer 12, which is used to shield the noise of the touch screen. The touch screen has 5 touch sensing wires in total: an upper left wire 82 , an upper right wire 83 , a lower left wire 85 , a lower rig...

Claims

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Application Information

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IPC IPC(8): G06F3/041G02F1/133
Inventor 陈悦邱承彬吴显浩
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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