Compensation method and touch sensing circuit for compensating touch sensing data for non-uniformity of a touch display panel

Abstract

A compensation method and a touch sensing circuit for compensating touch sensing data of a touch display panel are disclosed. The compensation method includes generating a feature value based on a touch sensing frame, wherein the feature value is related to the signal diffusion degree of the touch sensing frame; then, a weight is determined based on the feature value to determine a filter, wherein the filter consists of a plurality of filter coefficients, and each filter coefficient is calculated based on the weight. The determined filter is then applied to the touch sensing frame to generate a compensated touch sensing frame. By employing this technical solution, the present invention can compensate for the non-uniformity of touch sensing data caused by process deviations in a touch display panel, exhibiting significant effectiveness in data compensation for touch display panels.

Claims

1. A compensation method for compensating touch sensing data of a touch display panel, the compensation method comprising: A feature value is generated based on a touch sensing frame, wherein the feature value is related to the signal diffusion degree of the touch sensing frame; a weight is determined based on the feature value; a filter is determined, wherein the filter consists of a plurality of filter coefficients, and each filter coefficient is calculated based on the weight; and the determined filter is applied to the touch sensing frame to generate a compensated touch sensing frame.

2. The compensation method as described in claim 1, wherein, The determined weight is related to the resistance value of one of the high-impedance layers of the touch display panel.

3. The compensation method as described in claim 1, wherein, The step of determining the weight based on the feature value further includes: using a lookup table storing a plurality of pre-configured weights to determine the weight, wherein the pre-configured weights correspond to a plurality of pre-configured feature values.

4. The compensation method as described in claim 1, wherein, The step of applying the determined filter to the touch sensing frame further includes: applying the filter to each touch sensing data in the touch sensing frame to generate each compensated touch sensing data of the compensated touch sensing frame.

5. A touch sensing circuit for compensating touch sensing data of a touch display panel, the touch sensing circuit comprising: A feature value generation module generates a feature value based on a touch sensing frame, wherein the feature value is related to the signal diffusion degree of the touch sensing frame; a weight determination module electrically coupled to the feature value generation module determines a weight based on the feature value; a filter generation module electrically coupled to the weight determination module, wherein the filter generation module is adapted to determine and generate a filter composed of a plurality of filter coefficients, and each filter coefficient is calculated based on the weight; and a frame generation module electrically coupled to the filter generation module, wherein the frame generation module applies the determined filter to the touch sensing frame to generate a compensated touch sensing frame.

6. The touch sensing circuit as described in claim 5, wherein, The determined weight is related to the resistance value of one of the high-impedance layers of the touch display panel.

7. The touch sensing circuit as described in claim 5, wherein, The weight determination module uses a lookup table storing a plurality of pre-configured weights to determine the weight, wherein these pre-configured weights correspond to a plurality of pre-configured feature values.

8. The touch sensing circuit as described in claim 5, wherein, For each touch sensing data in the touch sensing frame, the frame generation module applies the determined filter to each touch sensing data to generate each compensated touch sensing data of the compensated touch sensing frame.

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