Patent ID: 8441431

Claim:
A liquid crystal display comprising: a liquid crystal display panel; and a backlight unit configured to provide light to the liquid crystal display panel, the backlight unit including: a first transistor configured to generate a power voltage supplied through a power line as a driving current based on a driving voltage supplied to a gate electrode of the first transistor; a light emitting element configured to emit light by the first transistor; a second transistor connected to the first transistor in a current mirror form; a capacitor configured to store the driving voltage, one terminal of the capacitor being connected to the power line, and the other terminal of the capacitor being connected between gate electrodes of the first and second transistors; and at least two switching transistors configured to equally respond to a selection signal supplied through a selection line and form the same discharge path, so that the power voltage supplied through the power line is sunk to a constant current unit and the driving voltage is stored in the capacitor.