Patent ID: 6064359
Filing Date: 2000-05-16
Classification: G09G

Abstract:
An apparatus for enhancing the gray shade rendering capability of a display device, said display device having a frame rate of q frames per display cycle, comprising:a first comparator for comparing an intensity value representing a gray shade of a current pixel with a respective dither matrix threshold value and for providing a pixel on/off signal;a quantization table for storing a plurality of quantization values ranging from 1 to q and for outputting p quantization values as active quantization values in accordance with a quantized pixel value p and for shifting said quantization values in said table in response to a frame signal;a second comparator for comparing a quantized dither matrix threshold value to said active quantization values to produce an active quantized threshold signal;a pixel out generator responsive to said pixel on/off signal and said active quantized threshold signal for producing a pixel out signal;a display responsive to said pixel out signal for displaying said current pixel with an average gray value of p/q through a display period of q frames.