BACKLIGHT LIGHT SOURCE, BACKLIGHT DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR CONTROLLING LIGHTING OF BACKLIGHT LIGHT SOURCE

摘要

The purpose of the present invention is to prevent a DC/DC converter and the periphery thereof from being heated to a high temperature. A lighting timing determination unit (21) can switch between a first mode in which the reference points in time for at least either turning on or turning off of LEDs are different for each line in an LED matrix, and a second mode in which the reference points in time for at least either turning on or turning off of LEDs correspond to each other for at least two lines in the LED matrix and the reference points in time do not correspond between the two lines and the other lines. When the temperature of the DC/DC converter exceeds a prescribed value, the lighting timing determination unit (21) switches to the second mode that is a heat generation reduction mode.