Downsampling data for crosstalk compensation

摘要

A touch sensitive device having circuitry to compensate for crosstalk from the device display to the device touch sensor panel is disclosed. The crosstalk compensation circuitry can include a downsampler and a crosstalk compensator. The downsampler can downsample a display image to a manageable size for transmission and processing and can then send the downsampled image to the crosstalk compensator so as to provide information about the display operation that can be used to estimate the expected amount of crosstalk caused by the display. The crosstalk compensator can estimate the amount of crosstalk based on the downsampled image and can then compensate a touch image captured by the touch sensor panel for the estimated amount, the touch image being indicative of a touch or hover event at the panel.

主权项

1. A touch sensitive device comprising:
a display configured to show a display image; a touch sensor panel configured to capture a touch image; and logic configured to
downsample the display image,generate a plurality of compensation values based on the downsampled display image, each of the plurality of compensation values being representative of crosstalk in a corresponding plurality of touch pixels in the captured touch image, andapply the plurality of compensation values to the captured touch image to compensate the captured touch image for the crosstalk,wherein the compensated touch image is indicative of an amount of touch or hover.