Device and method for self-calibration of touch screen sensing value

Abstract

The invention discloses a touch screen induction value self-correcting device and method. The device comprises a multiplying unit, a comparison circuit and an automatic gain control circuit, wherein the multiplying unit is used for multiplying induction values of sensors with updated gain values and outputting corrected induction values; the comparison circuit is used for comparing the corrected induction values corresponding to all the sensors so as to obtain difference values corresponding to all the sensors; the automatic gain control circuit is used for calculating the gain values of all the sensors so that the corrected induction values corresponding to all the sensors can be approximately equal in a next round of operation; the calculated gain values corresponding to all the sensors are compared with historical gain values; if a difference value is beyond a set range, it is indicated that the gain values are still unstable and need to be corrected continuously; if the difference value is within the set range, it is indicated that the gain values are stable, the gain values are saved, and the self-correcting process is ended. By means of the touch screen induction value self-correcting device and method, all the sensors have the same value after being corrected, and induction value errors caused by property difference of touch screens or for other reasons are avoided.

Description

technical field [0001] The present application relates to the field of touch screen calibration, and in particular, relates to a device capable of self-correcting the sensing value of the touch screen, and a calibration method using the device. Background technique [0002] Digital mobile devices have been widely used in all aspects of people's lives, especially touchable digital mobile devices that facilitate human-computer interaction, and have been widely used in various digital devices that require human-computer interaction, including mobile phones, ATM machines, and PADs. . These touchable digital mobile devices mainly rely on touch screens to input information and replace keyboards. Therefore, whether it can accurately reflect the touched position of the touch screen is the key to the correct interaction between man and machine. If different sensors of the touch screen have different characteristics, different sensing values ​​may be obtained for the same touch, tha...

AI Technical Summary

Problems solved by technology

If different sensors of the touch screen have different characteristics, different sensing values ​​may be obtained for the same touch, that is, the touch position cannot be accurately calculated, and the information expressed by the user cannot be correctly transmitted.

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