Patent ID: 9521401
Filing Date: 2016-12-13
CPC Classification: G09G,H04N

Claim Text:
1. A video display apparatus comprising: a subframe data generating circuit configured to convert every frame regarding an input video signal into a sequence of subframes defined by step bit pulses respectively according to a first drive gradation table and a second drive gradation table, and thereby generate subframe data from the input video signal while alternately using the first drive gradation table and the second drive gradation table; wherein the first drive gradation table is designed so that a subframe for a mid drive period in the sequence is assigned a pixel activated state when a drive gradation related to the input video signal is 1, a number of subframes assigned the pixel activated state increases each time the drive gradation increases by 1, a subframe newly assigned the pixel activated state is a subframe following the subframe or subframes which have already been assigned the pixel activated state when the drive gradation increases from an odd number to a next even number, and a subframe newly assigned the pixel activated state is a subframe preceding the subframes which have already been assigned the pixel activated state when the drive gradation increases from an even number to a next odd number equal to or greater than 3; wherein the second drive gradation table is designed so that a subframe for a mid drive period in the sequence is assigned the pixel activated state when the drive gradation is 1, a number of subframes assigned the pixel activated state increases each time the drive gradation increases by 1, a subframe newly assigned the pixel activated state is a subframe preceding the subframe or subframes which have already been assigned the pixel activated state when the drive gradation increases from an odd number to a next even number, and a subframe newly assigned the pixel activated state is a subframe following the subframes which have already been assigned the pixel activated state when the drive gradation increases from an even number to a next odd number equal to or greater than 3; a liquid-crystal display device; and a drive circuit configured to drive the liquid-crystal display device in response to the subframe data generated by the subframe data generating circuit.