Substrate cell-gap compensation apparatus and method

A display comprises:

• a pair of substrates having an active region including a plurality of pixels;
• a plurality of capacitors disposed at predetermined locations between the substrates;
• sensors coupled to the plurality of capacitors, configured to measure capacitances of the plurality of capacitors;
• a calculation unit coupled to the sensors, configured to determine a compensating value for at least one pixel of the plurality of pixels in response to the capacitances of the plurality of capacitors and in response to the predetermined locations;
• an adjustment unit coupled to receive a location of the at least one pixels, coupled to receive video data for the at least one pixel, and coupled to the calculation unit, the adjustment unit configured to determine a compensated value for the at least one pixel in response to the location of the at least one pixel, the video data for the at least one pixel and to the compensating value for the at least one pixel;
• and
• a driver unit coupled to the adjustment unit, configured to drive the at least one pixel in response to the compensated value for the at least one pixel.

A method for driving a display including a plurality of pixels comprises:

• displaying a predetermined image to the display;
• capturing an image of the predetermined image on the display with an acquisition unit;
• comparing intensities of the predetermined image to the image of the predetermined image to form a difference image;
• determining a cell gap relationship for the plurality of pixels in response to the difference image;
• and
• determining intensity compensating values for pixels on the display in response to the cell gap relationship.