US Patent 7852312 System for controlling driving lamp of backlight unit

A liquid crystal display device including a liquid crystal display panel, a lamp for emitting light to the a liquid crystal display panel, a timing controller for generating a lamp control signal to control a light-on time of the lamp, and an inverter for controlling a light-on and a light-off of the lamp according to the lamp control signal while limiting current and maintaining power supplied to the lamp regardless of the light-on time for the lamp.