Liquid crystal display device

摘要

A liquid crystal display device includes a local dimming function that reduces the feeling of strangeness given to viewers caused by light leakage. A video display control portion controls the aperture ratio of liquid crystal pixel outside an image display area. A backlight control portion controls the brightness value of light emitting element that illuminate a region outside the image display area so as to be a predetermined value in response to control signals output from the video display control portion. A liquid crystal display device controls the brightness of the region outside the image display area so as to be a predetermined value on the basis of the correlation between the aperture ratio of the liquid crystal pixel outside the image display area and the brightness value of the light emitting element that illuminates the region outside the image display area.

主权项

1. A liquid crystal display device comprising a liquid crystal panel displaying video data, a backlight unit having a plurality of light emitting elements arranged thereon for illuminating the liquid crystal panel, a video display control portion displaying a video as a sub-screen in a restricted video display area of the liquid crystal panel, and a backlight control portion controlling a light emission luminance of the light emitting elements of the backlight unit in response to control of the video display control portion, wherein
the video display control portion controls an aperture ratio of a liquid crystal pixel lying in a region outside a sub-screen video display area to be a predetermined value, the backlight control portion controls a luminance value of light emitting element illuminating the region outside the sub-screen video display area to be a predetermined value in response to the control of the video display control portion, and a luminance of the region outside the sub-screen video display area is controlled to be a predetermined value, based on a correlation between the aperture ratio of the liquid crystal pixel lying in the region outside the sub-screen video display area, controlled by the video display control portion, and the luminance value of the light emitting element illuminating the region outside the sub-screen video display area, controlled by the backlight control portion.