Anti-interference method for touch detection, system and touch terminal
A technology of touch detection and detection frequency, which is applied in the field of touch control, can solve problems affecting work efficiency, and achieve the effect of minimizing signal interference and no impact on work efficiency
Active Publication Date: 2013-03-06
SHENZHEN GOODIX TECH CO LTD
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Problems solved by technology
[0004] Although the above method can overcome LCM interference and common mode interference, it needs to switch different driving frequencies many times to find the driving frequency with the least interference, which greatly affects the work efficiency
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] In the present invention, first drive the touch detection system with an initial frequency, then detect the interference intensity values at different detection frequencies respectively, and then use the minimum interference intensity value with the corresponding detection frequency as the driving frequency during normal operation, so that Signal interference from the touch terminal is minimized.
[0021] figure 1 The implementation flow of the anti-interference method for touch detection provided by the present invention is shown, and the details are as follows.
[0022] Step A, in the ...
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The invention is suitable for the technical field of touch control, and provides an anti-interference method for touch detection, a system and a touch terminal. The method comprises the following steps of: detecting the interference strength value of a touch detection system which corresponds to the current detection efficiency at different detection frequencies respectively in a non-driving state; and driving the touch detection system to work normally by taking a detection frequency which corresponds to a minimum interference strength value as a target frequency of frequency hopping. Through an interference strength value which corresponds to each detection frequency at an initial driving frequency, a driving frequency which corresponds to the minimum interference strength value is taken as a normal working frequency, so that the signal interference of the touch detection system is minimized, the driving frequency is only required to be switched once in an entire process, and the overall working efficiency is basically not influenced.
Description
technical field [0001] The invention belongs to the field of touch technology, and in particular relates to an anti-interference method, system and touch terminal for touch detection. Background technique [0002] There are two types of signal interference on the touch terminal: liquid crystal display module (LCM, LCD Module) interference and common mode interference. How to effectively overcome LCM interference and common mode interference has always been a focus of attention in the industry. [0003] At present, there is a method: drive the touch detection system with all the driving frequencies supported by the touch detection system in turn, and detect the interference intensity value of the touch detection system when each driving frequency is driven, and then frequency hop to the minimum interference intensity value. Corresponding to the driving frequency, the touch detection system is driven to work normally with the driving frequency corresponding to the minimum int...
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CPCG06F3/0418
Inventor 李华飞石钱松邓耿淳冉锐叶金春
Owner SHENZHEN GOODIX TECH CO LTD