Patent ID: 8339356

Claim:
A liquid crystal display apparatus comprising: a white color light source and a coloring light source which irradiate light upon a liquid crystal panel for displaying an image; a detection circuit which detects a brightness of an input image signal; an image quality processing calculation circuit; a light source control circuit; and an image control circuit; wherein the coloring light source includes a blue light source, wherein the image quality processing calculation circuit outputs to the light source control circuit a light source control signal for increasing a light intensity of the coloring light source when an average luminance of the input image signal is detected to be higher than a predetermined luminance based on a detection result of the detection circuit; wherein the image quality processing calculation circuit outputs to the light source control circuit a light source control signal for turning-on only the white color light source without turning-on the coloring light source when the average luminance of the input image signal is detected to be lower than the predetermined luminance based on the detection result of the detection circuit; wherein the image quality processing calculation circuit outputs to the image control circuit an image control signal for controlling an image to be displayed on the liquid crystal panel; and wherein the light source control circuit independently controls turns-on and turn-off of each of the white color light source and the coloring light source based on the light source control signal.