LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR CONTROLLING SAME

摘要

Provided is a liquid crystal display device with which it is possible to suppress degradation of image quality during video display or three-dimensional display without causing gradational luminance irregularities. Writing of an image to be displayed is sequentially performed from one side of a panel to the other side thereof during each frame period, and writing of a black image is sequentially performed from the one side of the panel to the other side thereof during the vertical blanking period in each frame period. A plurality of LEDs composing a backlight are divided into a plurality of segments so that a group of LEDs arrayed in a line in the direction in which scanning signal lines extend belong to the same segment. A segment lighting control circuit in a backlight control circuit controls emission intensities of the LEDs segment by segment so that the intensity of light irradiating the panel increases gradually from the one side of the panel to the other side thereof.

主权项

1. A liquid crystal display device, comprising:
a liquid crystal panel including a plurality of scan signal lines and a plurality of image signal lines that intersect with the plurality of scan signal lines; a plurality of light sources as a backlight that radiates light to a rear surface of the liquid crystal panel; a light source control unit that controls an intensity of light emitted by the plurality of light sources; and a liquid crystal panel driving unit that drives the liquid crystal panel, wherein the plurality of light sources are divided into a plurality of groups such that a set of light sources aligned in a direction extending along the plurality of scan signal lines belongs to a same group, wherein the liquid crystal panel driving unit writes an image to be displayed to the liquid crystal panel every frame period from one edge to an opposite edge of the liquid crystal panel in a direction extending along the plurality of image signal lines, and writes a black image from said one edge to said opposite edge of the liquid crystal panel during a vertical blanking period in each frame period, and wherein the light source control unit controls the intensity of light emitted the plurality of light sources for each group such that the intensity of light radiated to the liquid crystal panel increases from said one edge to said opposite edge of the liquid crystal panel.