Projector and projector accessory

Details Projector and projector accessory Projector and projector accessory

2007-03-06

2007-03-06

Dowling, William C. (Department: 2851)

Optics: image projectors

Pointer

C353S122000, C345S158000

Reexamination Certificate

active

10960118

ABSTRACT:
A projector for enlarging and projecting the display image on a light valve onto a screen is provided with: an infrared photodetector for photodetecting infrared light that is emitted by an electronic pen that is manipulated on the screen and that is provided with an infrared light emission device and ultrasonic generator; at least two ultrasonic receivers for detecting ultrasonic waves that are emitted by the electronic pen; means for measuring the distance to a screen; and means for supplying coordinate data in which the position of the electronic pen on the screen, which has been calculated based on output of the infrared photodetector, output of the ultrasonic generator, and output of the means for measuring the distance to the screen, has been normalized by the length of a side of a projected rectangular image that has been enlarged and projected.

REFERENCES:
patent: 6437314 (2002-08-01), Usuda et al.
patent: 6575581 (2003-06-01), Tsurushima
patent: 6598979 (2003-07-01), Yoneno
patent: 6798403 (2004-09-01), Kitada et al.
patent: 2002/0101412 (2002-08-01), Tasaki
patent: 2004/0075820 (2004-04-01), Chu et al.
patent: 2004/0239653 (2004-12-01), Stuerzlinger
patent: 2005/0083301 (2005-04-01), Tamura
patent: 2005/0270494 (2005-12-01), Banning
patent: 2006/0183994 (2006-08-01), Murayama et al.
patent: 2006/0195274 (2006-08-01), Suzuki et al.
patent: 3-210622 (1991-09-01), None
patent: 7-230354 (1995-08-01), None
patent: 2000-222127 (2000-08-01), None
patent: 2002-207566 (2002-07-01), None
patent: 2002-297119 (2002-10-01), None
patent: 2002/331796 (2002-11-01), None
patent: 2002-333314 (2002-11-01), None
patent: 2002-351605 (2002-12-01), None

Affiliated with

Also associated with

Rating

Projector and projector accessory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projector and projector accessory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projector and projector accessory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3794942