Patent ID: 7499199
Filing Date: 2009-03-03
Classification: G09G

Abstract:
1. An image processing circuit, comprising: an input unit that receives input of image data represented in n gray scale levels; first and second lookup-table storage units that store gray scale correction characteristics data for m gray scale levels, where m is less than n; an interpolation circuit that linearly interpolates the gray scale correction characteristics data using outputs from the first and second lookup-table storage units, the outputs being associated with mutually adjacent input gray scale values; and a gray scale correcting circuit that corrects gray scales of the image data using gray scale correction characteristics data obtained by the linear interpolation; the interpolation circuit using a first output gray scale value output from the first lookup-table storage unit and a second output gray scale value output from the second lookup-table storage unit, the second output gray scale value being less than the first output gray scale value, to interpolate gray scale correction characteristics data between the first output gray scale value and the second output gray scale value.