Patent ID: 8004488

Claim:
A light device comprising: a backlight unit comprising light emitting diode devices; a multi-sensor unit provided in a light emission region of the backlight unit capable of sensing a wavelength and/or intensity of light emitted from the light emitting diode devices and transmitting sensed values as feedback; a backlight driving unit for supplying driving power to the light emitting diode devices; and a backlight control unit for receiving the sensed values from the multi-sensor unit to control the light emitting diode devices through the backlight driving unit, wherein the multi-sensor unit comprises: a housing comprising a top surface, a bottom surface, and four lateral sides, and a plurality of color sensors, wherein a color sensor is installed inside each lateral side of the housing, wherein the housing further comprises sensor light reception holes formed in the four lateral sides of the housing to expose the plurality of color sensors.