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Positioning device of touch device and positioning method thereof

A technology of a touch device and positioning method, applied in the input/output process of data processing, input/output of user/computer interaction, instruments, etc., can solve the problems of different capacitance values ​​and affect the accuracy of the touch position, and achieve The effect of improving accuracy and reducing consumption

Inactive Publication Date: 2012-08-22
ITE TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a certain sensor, when the touch position is located at the center of the sensor and at the border, the capacitance value sensed by the sensor will be different, which also affects the accuracy of the calculated touch position

Method used

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  • Positioning device of touch device and positioning method thereof
  • Positioning device of touch device and positioning method thereof
  • Positioning device of touch device and positioning method thereof

Examples

Experimental program
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Embodiment Construction

[0028] figure 1 It is a schematic diagram of a touch device 1 according to an embodiment of the present invention. Please refer to figure 1 , the touch device 1 includes a touch panel 50 and a positioning device 100 . The touch panel 50 is a capacitive touch panel, which interleaves the arrangement of the diamond-shaped electrode matrix on the X-axis and the Y-axis. Wherein, the electrodes on each of the scan lines CIN0 - CIN7 on the X-axis are electrically connected, and the electrodes on each of the scan lines CIN8 - CIN15 on the Y-axis are also electrically connected. The positioning device 100 includes a multiplexer 110 , a converter unit 120 and a processing unit 130 .

[0029] The multiplexer 110 is coupled to the touch control panel 50 . When a touch tool (such as a finger or a stylus) touches the touch panel 50 , the diamond-shaped electrode forms a capacitive coupling with the touch tool to change the capacitance value sensed by the sensor. Therefore, when the to...

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PUM

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Abstract

The invention relates to a positioning device of a touch device and a positioning method thereof, wherein the touch device is provided with a plurality of scanning lines. The positioning method comprises the following steps of: firstly, sensing the capacitance values of the scanning lines; then selecting the sensed capacitance values of the ith scanning line and a scanning line subset adjacent tothe ith scanning line; when the capacitance value of the ith scanning line is larger than that of the scanning line subset, judging that the capacitance value of the ith scanning line is a wave crestcapacitance value; and finally calculating a touch position according to the wave crest capacitance value and the capacitance value of the scanning line subset.

Description

technical field [0001] The present invention relates to a positioning device and a positioning method thereof, in particular to a device and a method capable of improving the accuracy of positioning a touch position of a touch device. Background technique [0002] With the rapid development of technology, most electronic devices, such as notebook computers, mobile phones or portable multimedia players, are usually equipped with touch panels to replace traditional keyboards as a new generation of input interfaces. Touch panels can be roughly classified into resistive, capacitive, infrared, and ultrasonic, among which resistive touch panels and capacitive touch panels are the most common products. In the capacitive touch panel, the capacitance value of the touch panel changes when a finger or a conductive material approaches or touches the touch panel. When the touch panel detects the change of the capacitance value, it can determine the position where the finger or the condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/03G06F3/044
Inventor 卢正隆黄舜耕
Owner ITE TECH INC