Patent ID: 6020869
Filing Date: 2000-02-01
Classification: G09G

Abstract:
A multi-gray level display apparatus comprising:a display panel having a plurality of pixels, each pixel being driven by at least one voltage selected from a group of preset voltages in accordance with multi-gray level display data for the pixel;a first gray-level pattern generating circuit generating a first gray-level pattern for acquiring a gray level during m frame periods (where m is an integer not less than 2);a second gray-level pattern generating circuit generating a second gray-level pattern for acquiring another gray level during n frame periods (where n is an integer greater than m);display data converting means for converting input k-bit multi-gray level display data to i-bit multi-gray level display data (where k is a positive integer greater than j); andan operation circuit for generating a result by performing an operation on the j-bit multi-gray level display data in accordance with the first gray-level pattern when the k-bit multi-gray level display data corresponds to a display gray level based on the first gray-level pattern, and in accordance with the second gray-level pattern when the k-bit multi-gray level display data corresponds to a display gray level based on the second gray-level pattern, and for outputting the result,wherein said first gray-level pattern generating circuit generates a first gray-level pattern which controls a plurality of pixels included in a first controllable unit so that a gray level is provided during m frame periods, and said second gray-level pattern generating circuit generates a second gray-level pattern which controls a plurality of pixels included in a second controllable unit so that another gray level is provided during an n-frame period, andwherein said first gray-level pattern generating circuit controls m.times.m pixels included in the first controllable unit, and said second gray-level pattern generating circuit controls n.times.n pixels included in the second controllable unit.