Method and apparatus for producing grey levels on a raster scan

Details Method and apparatus for producing grey levels on a raster scan Method and apparatus for producing grey levels on a raster scan

1993-12-16

1995-03-21

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345 89, G09G 336

Patent

active

054000440

ABSTRACT:
A signal generator generates a plurality of grey level signals which are inputted into a one bit-per-pixel raster scan video display device (such as a simple matrix liquid crystal display). Each grey level signal causes a particular proportion of pixels to be illuminated, in order to produce a particular grey level. Uniform high quality grey levels are produced by introducing into each grey level signal a variable frame phase shift for successive rows of each frame. The specific phase shifts introduced between successive rows and frames result in the illuminated pixels being distributed evenly in each frame. The pattern of illuminated pixels changes smoothly with time to produce the required uniform high quality grey level.

REFERENCES:
patent: 4688031 (1987-08-01), Haggerty
patent: 4698691 (1987-10-01), Suzuki et al.
patent: 4827255 (1989-05-01), Ishii
patent: 4972500 (1990-11-01), Ishii et al.

Affiliated with

Also associated with

Rating

Method and apparatus for producing grey levels on a raster scan does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for producing grey levels on a raster scan , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for producing grey levels on a raster scan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1152194