Patent ID: 8411136

Claim:
A video display apparatus comprising: a backlight; a signal processing module configured to process an input video signal and output an output video signal for 2D display and 3D display; a transmission-type display panel configured to control transmission of light supplied from the backlight according to the output video signal; and a display switching module configured to switch between a backlight lighting period for the 2D display and a backlight lighting period for the 3D display, wherein the display switching module is configured for the 2D display to turn on the backlight during a current rewriting period for video to be displayed on the transmission-type display panel and then turn off the backlight at a time equal to or earlier than a start of a next rewriting period for video to be displayed on the transmission-type display panel and is configured for the 3D display to execute processing of inserting a black image every time the video to be displayed on the transmission-type display panel is rewritten and to turn on and off the backlight so that the center of the backlight lighting period for the 3D display is overlapped with an insertion period of the black image.