Patent ID: 6091396
Filing Date: 2000-07-18
Classification: G09G

Abstract:
A display apparatus, in which a field, comprising a digital signal, is divided into a plurality of sub-fields, each one of the plurality of sub-fields corresponding to a bit, having different relative ratios of luminescent time and each one of the plurality of sub-fields indicating either a state of luminescence or non-luminescence for displaying gray scale images, comprising:code conversion means for converting a video signal into a coded signal comprised of a plurality of bits, each bit indicating a state of luminescence or non-luminescence in the respective sub-fields, the plurality of sub-fields including at least one sub-field having a relative ratio of luminescent time which deviates from a power series of 2;wherein the plurality of sub-fields having a high relative ratio of luminescent time are arranged in a time sequence in a descending or ascending order, the high relative ratio of luminescent time including at least the highest, the second highest and the third highest relative ratios of luminescent time; andwherein, when an up-shift occurs in a circumstance that at a gray level of n which is an integer not less than 0, a first sub-field having the high relative ratio of luminescent time indicates a state of luminescence while a second sub-field having a next higher relative ratio of luminescent time than the first sub-field indicates a state of non-luminescence, and at a gray level of n+1, the second sub-field indicates a state of luminescence, the first sub-field indicates a state of non-luminescence at the gray level of n+1.