BACKLIGHT UNIT USING RED LED, GREEN LED AND BLUE LED

摘要

PURPOSE: A backlight unit using a red LED(Light Emitting Diode), a green LED and a blue LED is provided to set colors and luminances for which a user wishes by mounting the three LEDs and combining lights radiated through the three LEDs. CONSTITUTION: A backlight unit(1) radiates light in a rear surface of a keypad(2). The backlight unit includes a red LED(12), a green LED(13) and a blue LED(14). The backlight unit radiates the light as a certain color by combination according to the strength of the lights of the LEDs to indicate a color set by a user.