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Touch sensing method for detecting positions of touching of touch sensor

一种触碰传感器、感测方法的技术，应用在仪器、数据处理的输入/输出过程、电数字数据处理等方向，能够解决噪声干扰、位置漂移等问题

Active Publication Date: 2011-06-15
SILICON INTEGRATED SYSTEMS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is susceptible to noise interference, that is, the calculated position may drift due to noise

Method used

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  • Touch sensing method for detecting positions of touching of touch sensor
  • Touch sensing method for detecting positions of touching of touch sensor
  • Touch sensing method for detecting positions of touching of touch sensor

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Embodiment Construction

[0029] image 3 Display the ideal waveform curve of two touches and the sensing signal waveform with two touches. In this example, the two touches occur at different coordinates along the X-axis dimension. For simplicity and clarity, the Y-axis dimension will not be discussed. However, those skilled in the art will understand that the situation of the Y-axis dimension is similar to that of the X-axis dimension. At image 3 Among them, the waveform curve 32 represents the first touch, and the waveform curve 34 represents the second touch. These touches can be made with fingers or other objects. Two touches occur simultaneously on different X-axis coordinates. As shown, the center point of the first wave curve 32 is at position u, while the center point of the second wave curve 34 is at position v. The waveforms 32 and 34 are ideal waveforms. In practice, a sensing signal having a waveform curve 38 is detected, which is approximately the sum of the first and second touch ...

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Abstract

A touch sensing method for detecting positions of touching of touch sensor is disclosed. In the present invention, a reference touch profile is provided. A variable ideal combination profile indicating multiple touches is obtained by synthesizing a plurality of reference touch profiles at different positions. The variable ideal combination profile is matched with a sensing signal. Actual touch positions can be identified from the sensing signal when the matching of the variable ideal combination profile with the sensing signal is optimal.

Description

technical field [0001] The present invention relates to touch sensing, and in particular to a touch sensing method using a comparison algorithm. The method is especially suitable for sensing simultaneous multi-point touches. Background technique [0002] figure 1 A schematic diagram of a general touch sensing device 1 is shown. The touch sensing device 1 has a touch panel 10 which includes a sensing array and has rails (such as 12 and 13 ) which alternate in rows and columns. The rail column 13 is detected via the touch sensor 14 , and the rail row 12 is detected via the touch sensor 16 . The touch sensors 14 and 16 send sensing signals indicating detection results to the touch controller 18 to determine the position and intensity of one or more touches on the touch panel 10 . Such a touch sensing device 1 and its operation are well known in this field. [0003] For example, when two fingers touch the positions 15 and 17 of the touch panel 10 at the same time, the sensin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0416G06F3/0418G06F2203/04104
Inventor 吴鸿伟陈泂甫杨绍圣
Owner SILICON INTEGRATED SYSTEMS
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