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Touch point positioning method and device for capacitive touch screen

A technology of capacitive touch screen and positioning method, which is applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., and can solve the problem of inaccurate positioning of touch points

Pending Publication Date: 2020-07-07
SHENZHEN HONGHE INNOVATION INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the object of the present invention is to propose a touch point positioning method and device for a capacitive touch screen to solve the problem of inaccurate touch point positioning

Method used

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  • Touch point positioning method and device for capacitive touch screen
  • Touch point positioning method and device for capacitive touch screen
  • Touch point positioning method and device for capacitive touch screen

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0047] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechan...

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Abstract

The invention provides a touch point positioning method of a capacitive touch screen. The touch point positioning method comprises the following steps: detecting capacitance values of all capacitancenodes; calculating capacitance value variation of all the capacitance nodes, and determining a touch area; selecting a peak capacitance node with the maximum capacitance variation in the touch area and a capacitance node group adjacent to the peak capacitance node; and calculating the coordinates of the touch point according to the capacitance value variation and the coordinates of the capacitancenode group or the capacitance value variation and the coordinates of the peak capacitance node and the capacitance node group. The invention further provides a touch point positioning device of the capacitive touch screen. According to the touch point positioning method and device of the capacitive touch screen, the coordinates of the touch point are obtained through calculation by means of the capacitance value variation and the coordinates of the selected capacitance nodes, the touch position can be calculated more accurately and efficiently, and meanwhile various application requirements are met.

Description

technical field [0001] The present invention relates to the field of capacitive touch technology, in particular to a touch point positioning method and device of a capacitive touch screen. Background technique [0002] At present, capacitive touch is more and more widely used in the touch industry. The principle that the capacitance of the conductor contacting the surface will reduce the capacitance value is used to realize the detection and application of touch. When the conductor touches the surface of the capacitive screen, it will absorb a part of the capacitance, which will cause the signal transmitted to the receiving end to weaken. Since there is a distance between the capacitor nodes and the nodes, after touching with a finger or a capacitive pen, an area (multiple capacitors) will be formed. change in capacitance value. The current positioning method for touch points has the problem that the result is not accurate enough. Contents of the invention [0003] In vi...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0418G06F3/044
Inventor 徐协增
Owner SHENZHEN HONGHE INNOVATION INFORMATION TECH CO LTD
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