Patent ID: 6313818
Filing Date: 2001-11-06
Classification: G09G

Abstract:
An adjustment method for an active-matrix type liquid crystal display device comprising the steps of:displaying images in pixels provided in a matrix of rows and columns of a display panel with an intensity variable between first and second brightness in accordance with a potential difference applied to liquid crystal layers through pixel and counter electrodes of said pixels,said first brightness being less in intensity than said second brightness;changing polarities of said potential differences every pixel or every multiple of pixels in at least one vertical scanning period;applying to said liquid crystal layers of a first group of said pixels said potential difference with the intensity of said first or second brightness and the same polarity during the vertical scanning period;setting said potential difference with the intensity of a third brightness and the same polarity on the second group of said pixels during the vertical scaring period; andadjusting said potential difference in accordance with said images of at least said third brightness which is intermediate in intensity between said first and second brightness thereby to reduce direct current components of said potential difference applied to said liquid crystal layers.