Patent ID: 7432659
Filing Date: 2008-10-07
Classification: G09G

Abstract:
1. A back light unit comprising: a plurality of light emitting diode (LED) arrays, the LED arrays having a plurality of light emitting diodes (LEDs); a detector which detects a feedback signal where the feedback signal corresponds to a current which is input to the LEDs; and a driver which drives the LEDs according to the feedback signal from the detector; wherein the driver includes: a current generator which generates a current and supplies the current to each LED of the plurality of LEDs through the detector; and a controller which controls the current generator according to the feedback signal from the detector; wherein the detector includes: a light emitting device which supplies the current from the current generator to each anode electrode of the LEDs and emits light in accordance with the current; and a light receiving device which converts the light from the light emitting device into the feedback signal and supplies the feedback signal to the controller.