Patent ID: 8237652

Claim:
A liquid crystal display (LCD) apparatus comprising: an LCD panel which displays an image; a backlight unit which is formed of a plurality of light emitting diodes (LEDs) and emits light to the LCD panel; a cooling fan which radiates heat generated from the backlight unit; a fan driver which drives the cooling fan; and a controller which selectively either controls the fan driver to set a rotation speed of the cooling fan based on a luminance value of the backlight unit or controls the backlight unit to set a luminance value of the backlight unit based on the rotation speed of the cooling fan, wherein the controller measures a luminance value of the backlight unit and detects the rotation speed of the cooling fan, and wherein the controller evaluates the rotation speed of the cooling fan, and if the controller determines that the rotation speed of the cooling fan is less than a reference speed as a result of the evaluation, the controller controls the backlight unit to reduce the luminance value of the backlight unit.