Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-04-22
1998-03-24
Tung, Kee M.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345 84, 345 89, 345 98, 345147, 345150, H04N 570
Patent
active
057318026
ABSTRACT:
A time interleaved bit addressed weighted pulse width modulation (PWM) method and apparatus reduces the bandwidth requirement necessary for providing a plurality of data entries regarding multiple points of information. As is well known, a weighted PWM scheme modulates an output by utilizing a frame time that is divided into events of varying durations; most conventional schemes have each bit in the frame being half the duration of its predecessor. The modulated signal is activated during all, some or none of the events in the frame to develop a signal representing a particular parameter. This method and apparatus can be used in a display for selecting among varying levels of gray scale or from among multiple colors on a palette. In one application for a display, a register containing the same number of data pits as pixels in a row of the display is provided. The register is loaded with one bit per frame for each pixel in the entire row. The bandwidth is reduced because the bit for each of the pixels are not all for the same weight event. This allows a bit for a long duration event to be displayed in one pixel, while more than one bit for shorter duration events to be displayed in another pixel. This obviates the need to load one bit for each pixel in the row during the shortest event duration. The organization of the sequence of the events amongst the various rows can be pseudo-random to achieve reduced bandwidth. If the organization is pseudo-random the order can be pre-selected for an optimized bandwidth or organized into a predetermined format to achieve a pseudo-random effect.
REFERENCES:
patent: 4021607 (1977-05-01), Amano
patent: 5185602 (1993-02-01), Bassetti, Jr. et al.
patent: 5196839 (1993-03-01), Johary et al.
patent: 5293159 (1994-03-01), Bassetti, Jr. et al.
patent: 5497172 (1996-03-01), Doherty et al.
patent: 5523803 (1996-06-01), Urbanus et al.
patent: 5548301 (1996-08-01), Kornher et al.
patent: 5619224 (1997-04-01), Hoshino et al.
Alioshin Paul A.
Aras Richard John Edward
Straker Bryan P.
Kovalick Vincent E.
Silicon Light Machines
Tung Kee M.
LandOfFree
Time-interleaved bit-plane, pulse-width-modulation digital displ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Time-interleaved bit-plane, pulse-width-modulation digital displ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-interleaved bit-plane, pulse-width-modulation digital displ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2292420