LED DRIVING CIRCUIT, BACK LIGHT AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME

摘要

An LED driving circuit, a backlight unit using the same, and an LCD are provided to reduce manufacturing costs by simplifying the LED driving circuit and correct luminescent brightness from each LED. An LED driving circuit comprises a DC/DC converter(18), a red LED driver circuit(20), a green LED driver circuit(22), and a blue LED driver circuit(24). The DC/DC converter produces an LED driving signal according to a PWM signal inputted by converting power, from the outside, into DC power. The red LED driver circuit lights at least one red LED according to the LED driving signal and a red luminance correction signal inputted from the outside. The green LED driver circuit lights at least one green LED according to a green luminance correction signal inputted from the outside. The blue LED driver circuit lights at least one blue LED according to a blue luminance correction signal inputted from the outside.