An electrowetting display device may comprise at least one pixel region that includes: a hydrophobic layer portion; an oil disposed on the hydrophobic layer portion, wherein an amount of light transmitted through the pixel region is based, at least in part, on an area of the hydrophobic layer portion that is covered by the oil; and a thin film transistor (TFT); a photo-sensor configured to generate a voltage based, at least in part, on the amount of light that transmits through the pixel region; and an electronic control circuit configured to (i) receive the voltage from the photo-sensor and (ii) provide a driving signal to the TFT of the pixel region, wherein an amplitude of the driving signal is based, at least in part, on the voltage from the photo-sensor.