Patent ID: 8947342
Filing Date: 2015-02-03
Classification: G09G

Abstract:
1. A method of controlling a backlight unit of a three-dimensional (3D) display apparatus formed of a liquid crystal display (LCD) unit including a plurality of partial units, a backlight unit and a light guide plate, the method comprising: inputting a 3D video sequence to the 3D display apparatus; determining an image brightness level of the 3D video sequence displayed on the LCD unit, for each of partial regions of the LCD unit to which a plurality of sub-blocks of the backlight unit emit light; determining turn-on times for the plurality of sub-blocks of the backlight unit, based on the image brightness level of each of the partial regions of the LCD unit; determining the turn-on periods for the plurality of sub-blocks of the backlight unit by synchronizing with a frame period of the 3D video sequence and a switching period between a set including a left visual point frame and a right visual point frame of the 3D video sequence; and repeatedly turning on and off each of the plurality of sub-blocks of the backlight unit, based on both the turn-on times and the turn-on periods of the plurality of sub-blocks of the backlight unit, wherein the sub-blocks of the backlight unit are separately adjusted by being synchronized with a frame period of the 3D video sequence, wherein a turn-on time for a sub-block of the backlight unit indicates time duration from a turn-on point to a turn-off point of the sub-block of the backlight unit, wherein a turn-on period for a sub-block of the backlight unit indicates time duration from the turn-on point to the subsequent turn-on point of the sub-block of the backlight unit, wherein the turn-on times for the plurality of sub-blocks of the backlight unit are differently determined with respect to same frame, and wherein the turn-on periods of the sub-blocks of upper backlight unit are determined to be longer from one sub-block to a next sub-block along a first direction, and the turn-on periods of the sub-blocks of lower backlight unit are determined to be shorter from one sub-block to a next sub-block along the first direction.