Patent ID: 6788306
Filing Date: 2004-09-07
Classification: G09G

Abstract:
A display apparatus comprising:a pseudo gray level data processor generating pseudo gray level data having m bits based on input gray level data having n bits representative of an input gray level of 2n gray levels, n being a natural number equal to or more than 2, and m being a natural number less than n, wherein said pseudo gray level data processor includes: a state variable generator generating state variable data having nâˆ’m bits, based on lower nâˆ’m bits of said input gray level data, an adder calculating a sum of said lower nâˆ’m bits of said input gray level data and said state variable data to output a carry bit representative of carry-over of said sum, and a pseudo gray level data calculator generating said pseudo gray level data based on said input gray level data and said carry bit, and wherein said pseudo gray level data calculator defines said pseudo gray level data such that said pseudo gray level data equals upper m bits of said input gray level data in a first case when said carry bit is â€œ0â€  and said input gray level belongs to first gray levels of said 2n gray levels, and such that upper mâˆ’1 bits of said pseudo gray level data equals upper mâˆ’1 bits of said input gray level data and the LSB (least significant bit) of said pseudo gray level data is selected from â€œ0â€  and â€œ1â€  in a second case when said carry bit is â€œ1â€  and said input gray level data belongs to said first gray levels.