Patent ID: 7474294

Claim:
Apparatus, comprising: an LCD display; a direct-firing backlight for the LCD display, said direct-firing backlight having a plurality of light emitting regions, wherein each light emitting region comprises a plurality of light sources; a plurality of light sensors, each of which is positioned to sense light produced by at least one of said light emitting regions; a light guide located between the LCD display and the direct-firing backlight, the light guide configured to receive light emitted by the direct-firing backlight upon a first major surface of the light guide and propagate a first portion of the received light out of an opposing major surface and towards the LCD display, the light guide further configured to reflect a second portion of the received light towards at least one of the plurality of light sensors; and a control system comprising a memory in which is stored a reference value, the control system configured to receive light information from said light sensors, compare the light information against the reference value and, in response thereto, regulate light emitted from the LCD display.