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Baseline updating method and touch device

An update method and baseline technology, which can be used in pulse technology, instruments, calculations, etc., and can solve problems such as inaccurate baseline updates.

Active Publication Date: 2013-01-02
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to at least solve the above-mentioned technical defects, especially solve the current problem of inaccurate baseline update

Method used

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  • Baseline updating method and touch device
  • Baseline updating method and touch device
  • Baseline updating method and touch device

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In order to have a clearer understanding of the baseline updating method and updating device in the embodiments of the present invention, the baseline and baseline updating conditions will be briefly introduced below.

[0029] Since the baseline represents environmental information, the capacitance information (environmental information) detected for the first time at power-on is usually taken as the initial value of the baseline. Since the change time of the environment is much longer than the change time of the touch, but the in...

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Abstract

The invention provides a baseline updating method. The baseline updating method includes: detecting a first frame capacitance value; setting a baseline according to the first frame capacitance value; detecting a current capacitance value of a touch screen, and calculating a difference value between the capacitance value and the baseline; when the difference value between the capacitance value and the baseline is smaller than a negative noise threshold, starting a first timer for timing; if the difference values within a first time range are smaller than the negative noise threshold, updating the baseline according to the capacitance value to activate an extreme value recovery function of the baseline; judging whether the touch screen is touched or not according to the difference value between the current capacitance value and the updated baseline; and if judgment shows that the touch screen is touched, deactivating the extreme value recovery function of the baseline to enable the baseline not to be updated when the difference value between the current capacitance value and the updated baseline is smaller than the negative noise threshold again. By the aid of the baseline updating method in the embodiment, the touch screen is applicable to various operating environments while the operating speed of the touch screen is unaffected, and a certain waterproof effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of electronic equipment manufacturing, in particular to a baseline updating method and a touch device. Background technique [0002] At present, the application range of touch screen has rapidly expanded from the small commercial market such as bank automatic teller machines and industrial computers to mobile phones, PDA (personal digital assistant), GPS (global positioning system), PMP (MP3, MP4, etc.), and even tablet computers. and other mass consumer electronics fields. The touch screen has the advantages of simple, convenient and humanized touch operation, so the touch screen is expected to become the best interface for human-computer interaction and has been widely used in portable devices. [0003] Since the detection principle of the touch screen is to detect the change of the capacitance of the touch screen, that is, to detect the difference between the capacitance value in the touch state and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCH03K2217/94031H03K2217/94026
Inventor 王经纬段革新李振刚黄臣杨云
Owner BYD SEMICON CO LTD
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