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Touch key scanning method and system

A scanning method and key technology, applied in the field of touch keys, can solve the problems of increasing the average working current of the touch key system and increasing the power consumption of the touch key system, and achieve the effects of reducing the average working current, accurate control, and reducing power consumption

Inactive Publication Date: 2013-01-09
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above detection method requires frequent detection of changes in Cx, frequent detection will increase the average operating current of the touch key system, increasing the power consumption of the touch key system

Method used

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  • Touch key scanning method and system
  • Touch key scanning method and system

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0052] Such as figure 1 As shown, the embodiment of the present invention provides a touch button scanning method, the method may include:

[0053] Step 101, setting the sleep time of two adjacent key scans; completing the scanning of all touch keys in the touch key system is called one key scan.

[0054] Step 102, when the interval between the current time point and the end time point of the last key scanning is equal to the sleep time, scan all the touch keys;

[0055] Step 103, when the touch key is scanned to be pressed, report the touch key to the main chip, so...

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Abstract

The invention provides a touch key scanning method and system. The method includes that: a sleep time between adjacent key scanning is set; when the interval between the current time point and the time point at which the previous key scanning is finished is equal to the sleep time, scanning is carried out on all the touch keys; when the touch key is scanned to be pressed down, the touch key is reported to a main chip, so that the main chip can process the touch key; whether scanning on all the touch keys is completed is judged; if yes, key scanning is stopped, so that the key scanning enters into sleep mode. The implementation of the invention reasonably sets a key scanning time and a sleep time of a touch key system according to the sleep mode of touch key chip and can reduce average working current, thus reducing power consumption of the touch key system.

Description

technical field [0001] The present invention relates to touch button technology, in particular to button scanning technology, and specifically to a touch button scanning method and system. Background technique [0002] Among the current touch buttons of electrical appliances, the commonly used buttons of the button operating system include resistive touch buttons, electromagnetic touch buttons and capacitive touch buttons. For capacitive touch keys, the touch of a finger will change the sensing capacitance Cx. When charging and discharging Cx, the change of Cx value will cause the change of the circuit signal, and the detection circuit can measure the change of the circuit signal, and then judge which button is touched, so as to report the touched button to the main chip of the electrical appliance, so that The main chip processes the reported touch key. [0003] In the process of realizing the present invention, the inventor finds that at least the following deficiencies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M11/20
Inventor 陈逢
Owner HISENSE VISUAL TECH CO LTD
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