Face approaching action recognition method based on capacitive touch screen

Abstract

The invention provides a face approaching action recognition method based on a capacitive touch screen. Whether the face approaching action exists or not can be judged by a manner that a detecting inductor connected with the capacitive touch screen is utilized to detect noise changes and noise strength on the capacitive touch screen. Compared with a common scheme adopting an infrared sensor for inducting, the face approaching action recognition method has the advantages that the face approaching action is judged through a TP capacitive far field coupling, in terms of the structure, the number of IR sensing circuits on a mainboard can be reduced, and special printing ink is not needed by a glass cover plate. The face approaching action recognition method is suitable for a mutual capacitance type touch screen and a self-capacitance type touch screen, the application range is wide, and application prospect is good.

Description

technical field [0001] The present invention relates to the application field of touch screen detection, in particular to a face approach recognition method based on a capacitive touch screen. Background technique [0002] Existing products, especially mobile phones, are often equipped with an infrared sensor, so that when people answer the phone, they can use the infrared sensor to judge whether the face is close, and then notify the main control to turn off the display, so as to save power and Effects such as preventing misuse. [0003] However, the need to add this infrared sensor on the mobile phone involves opening a transparent window on the glass cover of the mobile phone, and often this part of the shell of the mobile phone will be covered with ink due to the appearance, so in order to ensure the transparency of this part, it is often necessary Add special ink, in addition, it is necessary to add more IR sensor related circuits in the host. It can be seen that the ...

AI Technical Summary

Problems solved by technology

[0003] However, the need to add this infrared sensor on the mobile phone involves opening a transparent window on the glass cover of the mobile phone, and often this part of the shell of the mobile phone will be covered with ink due to the appearance, so in order to ensure the transparency of this part, it is often necessary Add special ink, in addition, it is necessary to add more IR sensor related circuits in the host

It can be seen that the traditional way of exclusively using infrared sensors will increase the cost of mobile phones, and will also reduce the yield rate in the production process of mobile phones

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