Patent ID: 6388678
Filing Date: 2002-05-14
Classification: G09G

Abstract:
A display apparatus for creating, for each image, a number of subfields Z from a first subfield to a Zth subfield in accordance with a Z bit representation of each pixel, a weighing value for each subfield, and a number of gradation display points, the display apparatus comprising:an average level detector that detects an average image brightness level; an image characteristic determining device that determines a weighing multiple including a positive integer part and a fractional part, based on the average image brightness level; and a pulse number setting device that multiplies the weighing multiple by the weighing value of each subfield to obtain a product capable of having a positive integer part and a fractional part, and that defines an integer value near the product as a number of drive pulses for each subfield; wherein the image characteristic determining device increases the weighing multiple as the average image brightness level decreases.