G - Physics – 03 – B
Patent
G - Physics
03
B
88/4
G03B 35/24 (2006.01) G03B 35/16 (2006.01) H04N 13/00 (2006.01)
Patent
CA 2003496
TITLE: PROJECTION SYNCHRONIZATION SYSTEM INVENTORS: ANTON L. BALJET GERARD C. CARTER GORDON N. HARRIS ABSTRACT An alternate eye 3-d projection system has a projector projecting alternate eye left and right images, has alternating eye 3-d glasses alternating between left and right lens transmissiveness, and has a phase delay unit synchronizing the left lens transmissiveness to left images and right lens transmissiveness to right images. A timing shutter is driven through a mechanical link to the projector primary mechanism at a frequency proportional to the frequency of the transistion between images. A sensor outputs pulses according to the rotationally frequency of the timing shutter. The phase delay unit receives the pulses, a multiplier multiplies the frequency of the pulses, a phase lock loop locks on to the frequency and a counter counts the pulses. After a preset delay the counter outputs a pulse. The delay is adjustable. The counter pulse enables a 60 KHz oscillator. The oscillations are counted by another counter and passed to a transmitter. The 60 KHz oscillations are disabled when the other counter reaches a preset amount. The other counter sets the duty cycle of the transmitter. Each of the components in the unit is duplicated in a back-up section. The back-up section is enabled when the primary phase lock loop is not locked on and the back- up phase locked loop is locked on.
Baljet Anton Leo
Carter Gerard C.
Harris Gordon W.
Bereskin & Parr
Imax Corporation
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