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Capacitive touch screen scanning method

A technology of capacitive touch screen and scanning method, which is applied in the direction of electrical digital data processing, instrumentation, input/output process of data processing, etc., can solve the problems of slowing down the speed and affecting the working time of touch screen products, and achieve the effect of reducing the scanning area

Inactive Publication Date: 2011-04-06
SUZHOU PIXCIR MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, touch screen products still use full-screen scanning to determine the user's touch point, which slows down the speed. In some touch screen products (such as mobile phones) that rely on battery power, it will greatly affect the working time of touch screen products.

Method used

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  • Capacitive touch screen scanning method
  • Capacitive touch screen scanning method
  • Capacitive touch screen scanning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0012] see figure 1 , the touch control system 100 includes a touch interface 101 and a host 102 . Among them, the touch interface 101 is used to detect the user's touch point, and send related information to the host 102 . The host 102 triggers corresponding functions according to the user's touch points, and counts the user's touch points in different modes. When performing multi-finger operations on the touch system 100, the touch system 100 needs to perform mutual coupling (hereinafter referred to as mutual capacitance) or self-coupling (hereinafter referred to as self-capacitance) scanning of the sensing electrodes in the relevant area, so that Determine the user's real touch point.

[0013] According to the working mode of the host computer 102, at least one hotspot area is preset for each mode, that is, at least one area on the touch surface 101 is ...

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Abstract

The invention provides a capacitive touch screen scanning method which comprises the following steps: connecting a touch screen with a host machine to detect touch signals, and presetting at least one hot region on the touch screen according to different operation modes of the host machine; selecting corresponding scanning modes according to the operation modes of the host machine to scan the corresponding hot regions, and determining the positions and the number of the true touch signals; and if the number is smaller than a first threshold or no touch signal is detected in the hot region, scanning the inductive electrodes in the regions other than the hot regions in a self-coupling mode, and scanning the inductive electrodes in the corresponding regions in a cross coupling mode, thereby determining the true touch positions. Related control can be realized during projection without additional hardware.

Description

technical field [0001] The invention relates to a touch screen scanning method, in particular to a capacitive touch screen scanning method. Background technique [0002] In recent years, with the rapid development of touch technology, more and more products begin to use the touch system to complete the direct operation of the target object, thus replacing the traditional mouse, keyboard and other input devices, thus saving space and carrying More convenient. Tablet PCs and touch-sensitive mobile phones, which are more common in the market at present, all adopt touch-control operations. [0003] The touch screen mainly uses the electrodes in the X direction and the Y direction to detect the capacitance, and according to the change of the capacitance before and after the touch, respectively determine the horizontal coordinates and the vertical coordinates, and then combine them into plane touch coordinates. When the existing touch screen products detect the user's touch poin...

Claims

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Application Information

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IPC IPC(8): G06F3/044
Inventor 邹新越
Owner SUZHOU PIXCIR MICROELECTRONICS
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