Touch point detection method, device, touch driving circuit and touch screen

A touch drive circuit and detection method technology, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problem of interfering with touch signals, affecting accuracy, reducing the signal-to-noise ratio of touch signals, etc. problem, achieve the effect of improving signal-to-noise ratio and ensuring accuracy

Inactive Publication Date: 2016-07-06
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Noise is generated during the refresh process of the display drive circuit, and the frequency of the noise is consistent with the refresh frequency. This noise will interfere with the touch signal obtained by the touch drive circuit, reduce the signal-to-noise ratio of the touch signal, and affect the touch drive. Accuracy of circuit judgment on touch operation

Method used

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  • Touch point detection method, device, touch driving circuit and touch screen
  • Touch point detection method, device, touch driving circuit and touch screen
  • Touch point detection method, device, touch driving circuit and touch screen

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Embodiment Construction

[0027] The specific implementations of the touch point detection method, device, touch drive circuit and touch screen provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] A method for detecting a touch point provided by an embodiment of the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0029] S101. Determine a touch point to be determined in each touch detection point of the touch screen;

[0030] S102. According to the touch signal, the first noise value, and the second noise value of the touch detection point in the row where the touch point to be determined is located, determine whether the touch point to be determined is affected by the noise of the display driving circuit; wherein, the first noise The value is the noise value of the touch driving circuit when the display driving circuit is not turned on, and the second noise value is t...

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Abstract

The present invention discloses a touch point detection method, device, a touch driving circuit and a touch panel. After determining a to-be-determined touch point among touch detection points of a touch panel, it is determined whether the to-be-determined touch point is influenced by noise of a display driving circuit according to a touch signal, a first noise value and a second noise value of touch detection points in a line where the to-be-determined touch point is located; and after it is determined that the to-be-determined touch point is influenced by the noise of the display driving circuit, it is determined whether the to-be-determined touch point is a touch point according to the second noise value and a preset first threshold value; the second noise value is the noise value of the touch driving circuit when the display driving circuit is turned on. Because it is determined whether the to-be-determined touch point is influenced by the noise of the display driving circuit before determining whether it is a touch point, it is possible to effectively identify interference of noise on the touch signals, improve signal-to-noise ratio of touch signals, and ensure accuracy of touch determining operation.

Description

technical field [0001] The present invention relates to the technical field of touch screens, in particular to a touch point detection method, device, touch drive circuit and touch screen. Background technique [0002] With the rapid development of display technology, touch screens (TouchScreenPanel) have gradually spread throughout people's lives. At present, the touch screen can be divided into three types according to the structure: an add-on touch screen (AddonModeTouchPanel), a surface-covering touch screen (OnCellTouchPanel), and an in-cell touch screen (InCellTouchPanel). Among them, the plug-in touch screen is produced separately from a touch screen and a Liquid Crystal Display (LCD), and then bonded together to form a liquid crystal display with a touch function. Covering the surface touch screen is to directly make touch components on the side of the color film substrate of the liquid crystal display facing away from the liquid crystal layer. Compared with the ext...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041
CPCG06F3/04186G06F3/041
Inventor 鲁友强邱云王静
Owner BOE TECH GRP CO LTD
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