Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1992-10-07
1993-12-21
Weldon, Ulysses
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
358455, 395132, 345 3, G09G 510
Patent
active
052724719
ABSTRACT:
A display system for converting N bit signals, each representing 2.sup.N gray levels, to M bit signals representing 2.sup.M gray levels, where N is an integer larger than or equal to 2 and M is an integer satisfying N>M.gtoreq.1. Each of the N bit signals are separated into higher M bits and lower N-M bits. There are 2.sup.N-M tables, each of which stores a distinctive set of P.times.Q modification values satisfying P.times.Q.gtoreq.2.sup.N-M. One of the tables is selected using the N-M bits. Unequality between a first set of modification values and a second set of modification values of the selected table are detected. The first set of modification values and the second set of modification values are exchanged to generate a modified table of the selected table. The M bits of one N bit signal and each of the modification values of the selected table are added to generate a first set of P.times.Q M bit signals. The M bits of the next N bit signal and each of the modification values of the modified table are added to generate a second set of P.times.Q M bit signals. The first and second sets of M bit signals are provided to a display device of 2.sup.M gray levels.
REFERENCES:
patent: 4956638 (1990-09-01), Larky et al.
patent: 5155478 (1992-10-01), Sekiya et al.
Pega 2, Users' Guide, Paradise Systems, Inc. 217 East Grand Avenue South San Francisco, Calif. 94080, 1986, pp. 1-14.
Pleshko, Peter, "Halftone gray scale for matrix-addressed displays," Information Display, Oct. 1990, pp. 10-11.
Asada Shigeki
Sohda Masayuki
Yasuda Hiroaki
Arnold Jack M.
International Business Machines - Corporation
Weldon Ulysses
LandOfFree
Display system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-311596