Abstract: Provided is a light device. The light device according to one embodiment comprises a backlight unit, a plurality of color sensors, a backlight unit driver, and a backlight unit controller. The backlight unit comprises a light emitting diode device to provide light. The plurality of color sensors senses a wavelength and an amount of light from the light emitting diode device to transmit sensed values as feedback. The backlight unit driver supplies driving power having a duty ratio of pulse width modulation to the light emitting diode. The backlight unit controller receives the sensed values to calculate an average value, a maximum value, a median value, and a minimum value, and then controls the duty ratio using the average value, the maximum value, the median value, and the minimum value.

Abstract: Provided is a light device according to one embodiment comprises a backlight unit, a plurality of color sensors, a backlight unit driver, and a backlight unit controller. The backlight unit comprises a light emitting diode device to provide light. The plurality of color sensors senses a wavelength and an amount of light from the light emitting diode device to transmit sensed values as feedback. The backlight unit driver supplies driving power having a duty ratio of pulse width modulation to the light emitting diode. The backlight unit controller receives the sensed values to calculate an average value, a maximum value, a median value, and a minimum value, and then controls the duty ratio using the average value, the maximum value, the median value, and the minimum value.