Patent ID: 8471807

Claim:
A method for calibrating a display comprising an array of individually-controllable light sources coupled to a controller, the individually-controllable light sources configured to emit light when supplied with electrical current under control of the controller in response to image data, the method comprising: collecting at least a portion of light emitted by one light source of the plurality of light sources; generating a collected light signal representative of the collected light, wherein the representative collected light signal comprises an electrical signal generated by at least one other light source of the plurality of light sources in response to the collected light; comparing the representative collected light signal to expected light characteristics; and, if the comparison indicates that an intensity of the collected light is different from an expected intensity indicated by the expected light characteristics, determining an intensity correction for the one light source, the intensity correction comprising an indication to alter a duty cycle of pulses of electrical current supplied to the one light source by the controller.