Touch data acquisition gain adjusting method, device and circuit and touch equipment

Abstract

The invention discloses a touch data acquisition gain adjusting method and device and touch equipment, and the method comprises the steps: obtaining a target gain value from a gain value group; touch sampling signals in each sampling channel in the touch screen are read under the target gain value, the touch screen is divided into a plurality of sampling channels, and each sampling channel is independently controlled; counting dead pixels in each sampling channel based on the touch sampling signal; and respectively determining the optimal gain value of each sampling channel, and for the sampling channel of which the optimal gain value is to be determined, taking the gain value corresponding to the minimum value of the total number of the dead pixels as the optimal gain value of the channel in the gain value group. On one hand, each channel can independently and automatically adjust the optimal gain value; and on the other hand, the total number of the bad points of each channel is minimum, so that the number difference of the bad points among the channels is reduced, and the whole signal looks more uniform.

Description

technical field [0001] The present invention relates to the technical field of data acquisition, and in particular to a touch control data acquisition gain adjustment method, device, circuit and touch control equipment. Background technique [0002] With the development of science and technology, the application of touch screen is more and more extensive. Taking capacitive touch as an example, in the sampling device of capacitive touch, each AD sampling channel at the signal receiving end needs a set of independent signal acquisition equipment and signal amplifier. The characteristic difference of the device is particularly sensitive, so there will be a relatively large overall difference between the amplified signal and other channel signals. The difference in signal is too large, resulting in sensitive touch in some places and poor in other places. At the same time, because the signal is too weak or too strong in some places, there will be a certain number of dead pixels...

AI Technical Summary

Problems solved by technology

Taking capacitive touch as an example, in the sampling device of capacitive touch, each AD sampling channel at the signal receiving end needs a set of independent signal acquisition equipment and signal amplifier. The characteristic difference of the device is particularly sensitive, so the amplified signal will have a relatively large overall difference compared with other channel signals

The difference in signal is too large, resulting in sensitive touch in some places, and poor in some places

At the same time, because the signal is too weak or too strong in some places, a certain number of dead pixels will be generated, so that it is not easy to pass the dead point detection, and thus the product is considered unqualified

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