Television – Video display – Color sequential
Patent
1995-03-31
1998-01-06
Lee, Michael
Television
Video display
Color sequential
348742, H04N 912
Patent
active
057060614
ABSTRACT:
A color image display system (10, 110, 120, 150) having a lamp power supply (78, 134, 152) switching rate being a multiple of, and synchronized to, a video frame rate. An AC component of a lamp driving waveform which may cause variations in intensity of the lamp output is synchronized to the video frame rate. Synchronizing the lamp power supply switching rate to the frame rate stops the beating and rolling of color bands in the video frame that may be produced by a ripple in light intensity. An odd number of switching cycles per two frame periods is chosen to alternate the phase of the ripple pattern frame-to-frame for ripple cancellation through integration. The lamp driving waveform may be amplitude modulated (90) to balance a lamp (14) that has spectral deficiencies. A DMD spatial light modulator (26) is utilized to modulate the colored light and generate a light image on a display (42) in either a sequential, or non-sequential image display system.
REFERENCES:
patent: H1320 (1994-06-01), Kieronski
patent: 4090219 (1978-05-01), Ernstoff et al.
patent: 4546379 (1985-10-01), Sarofeen et al.
patent: 5061049 (1991-10-01), Hornbeck
patent: 5079544 (1992-01-01), DeMond et al.
patent: 5101236 (1992-03-01), Nelson et al.
patent: 5105369 (1992-04-01), Nelson
patent: 5168406 (1992-12-01), Nelson
patent: 5192946 (1993-03-01), Thompson et al.
patent: 5231388 (1993-07-01), Stoltz
patent: 5233385 (1993-08-01), Sampsell
patent: 5240818 (1993-08-01), Mignardi et al.
patent: 5278652 (1994-01-01), Urbanus et al.
patent: 5312779 (1994-05-01), Nelson
patent: 5313479 (1994-05-01), Florence
patent: 5347321 (1994-09-01), Gove
patent: 5365283 (1994-11-01), Doherty et al.
patent: 5371543 (1994-12-01), Anderson
patent: 5386250 (1995-01-01), Guerinot
Huang Austin L.
Marshall Stephen W.
Donaldson Richard L.
Kesterson James C.
Klinger Robert C.
Lee Michael
Texas Instruments Incorporated
LandOfFree
Spatial light image display system with synchronized and modulat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spatial light image display system with synchronized and modulat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial light image display system with synchronized and modulat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2333460