Computer light pen interface system

Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for crt display

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

345181, G09G 100

Patent

active

058777520

ABSTRACT:
A light pen computer interface system utilizes a coil located externally of the computer's CRT display monitor to sense the magnetic field which provides the raster for the CRT. Vertical and horizontal sync detection circuits receive the sensor coil output and supply vertical and horizontal sync signals to a timing circuit. The timing circuit in response to an output signal from the light pen and the vertical and horizontal sync signals supplies a pen position signal to the computer which is either representative of the x,y coordinates position of the light pen on the CRT screen or representative of the change of x,y coordinates between successive positions of the light pen.

REFERENCES:
patent: 3594608 (1971-07-01), Mutton
patent: 3906197 (1975-09-01), Grover
patent: 4011546 (1977-03-01), Kawata et al.
patent: 4642459 (1987-02-01), Caswell et al.
patent: 5691749 (1997-11-01), Sugiyama

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Computer light pen interface system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer light pen interface system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer light pen interface system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-426848

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.