US 7,502,003 B2
Method for eliminating pi-cell artifacts
Lenny Lipton, Greenbrae, Calif. (US); Jeffrey J. Halnon, Richmond, Calif. (US); Jeff Wuopio, Petaluma, Calif. (US); and Bruce Dorworth, Vacaville, Calif. (US)
Assigned to REAL D, Beverly Hills, Calif. (US)
Filed on Jan. 19, 2001, as Appl. No. 9/766,130.
Claims priority of provisional application 60/177393, filed on Jan. 20, 2000.
Prior Publication US 2002/0003509 A1, Jan. 10, 2002
Int. Cl. G09G 3/36 (2006.01)
U.S. Cl. 345—87  [345/7; 345/30; 345/94; 345/95; 345/96; 359/462; 349/15; 348/42] 20 Claims
OG exemplary drawing
 
1. A method for driving a segmented pi-cell modulator in a stereoscopic image viewing system, comprising applying an alternating, unipolar-carrier waveform to the segmented pi-cell modulator, wherein the alternating, unipolar-carrier waveform does not change polarity within a time period that the segmented pi-cell modulator is energized.