Patent ID: 7199771
Filing Date: 2007-04-03
Classification: G09G

Abstract:
1. A light emitting device comprising: a plural light emitting elements; a current source for supplying a current to the plural light emitting elements; means for calculating an accumulation of light emission periods or gradation levels of each of the plural light emitting elements based on an image signal for controlling the light emission periods of the plural light emitting elements; means for storing data on a time-varying luminance characteristic of a light emitting element; means for determining an amount of luminance variation of the plural light emitting elements based on the calculated accumulation of the light emission periods or gradation levels of the plural light emitting elements and on the data on the time-varying luminance characteristic of the light emitting element, and for correcting the current supplied from the current source to the plural light emitting elements so that the luminance of one particular light emitting element among the plural light emitting elements returns to an initial value; and means for correcting the image signal so that a difference between an amount of luminance variation of the one particular light emitting element and that of the other light emitting elements are compensated, and for correcting the gradation level of the other light emitting elements.