Patent ID: 7649507
Filing Date: 2010-01-19
Classification: G09G

Abstract:
1. A white linearity control device of a plasma display panel including a plurality of address electrodes, a plurality of scan electrodes, and a plurality of sustain electrodes, comprising: a gamma corrector for gamma-correcting an externally input image signal according to an automatic power control (APC) level to output first correction data; an automatic power controller for calculating a load ratio of the first correction data to obtain the automatic power control level which is fed back to the gamma corrector, and outputting sustain and scan pulse information corresponding to the automatic power control level; a position discriminator for receiving the externally input image signal and for discriminating and outputting vertical and horizontal positions of the input image signal using vertical and horizontal synchronization signals included in the input image signal; a white linearity corrector for receiving the first correction data from the gamma corrector and receiving the discriminated vertical and horizontal positions from the position discriminator, and for multiplying the first correction data by white linearity values corresponding to the vertical and horizontal positions discriminated in the position discriminator to generate second correction data; and a sub-field data generator for generating sub-field data using the second correction data.