Patent ID: 8325292

Claim:
A liquid crystal display device comprising: a liquid crystal panel; and a backlight unit comprising: a LED light source; a light guide plate guiding the light emitted from the LED light source toward the liquid crystal panel; and a light diffusion plate disposed between the light guide plate and the liquid crystal panel, and diffusing light emitted from the light guide plate and supplying the diffused light to the liquid crystal panel, wherein the light guide plate is partitioned in a plurality of areas, and each of the plurality of areas is provided with the LED light source so as to control the light quantity for each area; and wherein, when the LED light source corresponding to one of the plurality of areas is turned on and the LED light source corresponding to one of the plurality of areas adjacent to the turn-on area is turned off, the ratio of the luminance at the center of the turn-off area adjacent to the turned-on area to the luminance at the center of the turn-on area is set to 0.3 to 0.5.