Backlight device

摘要

A backlight device, used in a liquid crystal display device, comprising: a substrate including first and second areas; a plurality of first light emitting diodes (LEDs) arranged in the first area at a density equal to or higher than a predetermined density; a plurality of second LEDs arranged in the second area at a density lower than the predetermined density; and a control unit configured to control current supplied to the first LEDs with respect to the temperature of the first area, and current supplied to the second LEDs with respect to the temperature of the second area so as to make the rate of change in effective value of the current supplied to the first LEDs different from the rate of change in effective value of the current supplied to the second LEDs when temperatures of the first and second areas are higher than a predetermined temperature.

主权项

1. A backlight device used in a liquid crystal display device, the backlight device comprising:
a substrate including a first area and a second area that is different from the first area; a plurality of first Light Emitting Diodes (LEDs) arranged in the first area at a density equal to or higher than a predetermined density; a plurality of second LEDs arranged in the second area at a density lower than the predetermined density; and a control unit configured to (i) control current supplied to the first LEDs in accordance with a first decrease rate, being a rate of decrease in effective value of current supplied to the first LEDs with respect to increase in temperature of the first area, when the temperature of the first area is detected to be higher than a predetermined first temperature, and (ii) control current supplied to the second LEDs in accordance with a second decrease rate, being a rate of decrease in effective value of current supplied to the second LEDs with respect to increase in temperature of the second area, when the temperature of the second area is detected to be higher than a predetermined second temperature, the second decrease rate being lower than the first decrease rate.