Method for driving planar light source device, method for driving color liquid crystal display device assembly, method for driving light emitting diode, and pulse-width modulating method

摘要

A method for driving a planar light source device is provided. The planar light source device includes (a) a plurality of planar light source units to light a color LCD device from the back, each planar light source unit including a red LED, a green LED, and a blue LED; and (b) a driving circuit to perform ON/OFF control of the red LED, the green LED, and the blue LED included in each planar light source unit on the basis of pulse-width modulation. The method includes adjusting respective pulse-width modulation unit clocks CL_R-unit, CL_G-Unit, and CL_B-Unit in each planar light source unit to long or short by increasing or decreasing the number of frequency division cycles of a system clock in the driving circuit.