Automatic convergence for image projection systems

Details Automatic convergence for image projection systems Automatic convergence for image projection systems

2004-04-01

2010-06-08

Tran, Trang U (Department: 2622)

Television

Video display

Projection device

C348S744000, C348S807000

Reexamination Certificate

active

07733429

ABSTRACT:
Systems and methods are provided that facilitate automatic convergence and geometry alignment in projection systems. Preferably, an optical element such as a lens array is coupled to all areas of the projection system's screen and to a detector element such as a photocell array. In operation, each lens of the lens array is adapted to map an individual portion or region of the screen onto the photocell array. A microprocessor, controller or the like uses the data output from the photocells to instruct an alignment controller to center or steer the beams to compensate for convergence error at a particular location. In a center alignment mode, four (4) or more beacon dots located about the periphery of the screen are detected to determine screen size and position, which is used to center the video image and the centers of the mapped regions on the screen.

REFERENCES:
patent: 4485394 (1984-11-01), Ghaem-Maghami et al.
patent: 4593308 (1986-06-01), Kemplin
patent: 4686429 (1987-08-01), Fendley
patent: 5345262 (1994-09-01), Yee et al.
patent: 5497054 (1996-03-01), Ryu
patent: 5883476 (1999-03-01), Noguchi et al.
patent: 5898465 (1999-04-01), Kawashima et al.
patent: 6707509 (2004-03-01), Chauvin et al.
patent: 6717625 (2004-04-01), Thielemans
patent: 6808270 (2004-10-01), Nelson et al.

Affiliated with

Also associated with

Rating

Automatic convergence for image projection systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic convergence for image projection systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic convergence for image projection systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4177379