Patent ID: 6177914
Filing Date: 2001-01-23
Classification: G09G

Abstract:
A plasma addressed electro-optical display comprising:a plasma cell including discharge channels arranged thereon in rows;a liquid crystal cell including signal electrodes arranged thereon in columns for defining pixels at the intersections with said discharge channels;a dielectric sheet interposed between said plasma cell and said liquid crystal cell;a scanning circuit for sequentially driving said discharge channels thereby selecting pixels in each row through said dielectric sheet;a signal circuit for driving said signal electrodes in synchronism with the driving of said discharge channels and in accordance with one image of picture data thereby writing signal voltages into said selected pixels;a calculating circuit for calculating, in accordance with picture data, effective potential differences between adjoining signal electrodes in each row and accumulating the results over one image;a compensating circuit for compensating for the signal voltages to be applied to the respective signal electrodes in accordance with the obtained results of calculation in said calculating circuit, said compensating circuit adding a compensating value, which is obtained by multiplying the result of accumulation by a coefficient, to picture data to thereby generate a compensated signal voltage, said coefficient used in said compensating circuit being determined by taking non-linearity of the transmission of said liquid crystal cell with respect to the signal voltage into consideration.