Optical coordinate input apparatus

Details Optical coordinate input apparatus Optical coordinate input apparatus

1988-05-26

1990-02-27

Harkcom, Gary V.

Boots, shoes, and leggings

340712, 341 5, 178 18, G06F 1300, G09G 302, G08C 2100

Patent

active

049051741

ABSTRACT:
In an optical coordinate input apparatus, an insect or mud may disturb optical coordinate input operation for a main computer. To avoid such a problem, light emitting element arrays and light receiving element arrays are arranged opposite to each other, a pair of these light emitting element and light receiving element are sequentially driven by a multiplexer, and a coordinate signal is output by a signal detecting device when an optical signal derived from the driven light emitting element cannot be received by the light receiving element positioned opposite to this driven light emitting element. Furthermore, a memory unit is employed to store the coordinate signal. A comparison is made by a coordinate signal comparing device whether or not the previous coordinate signal stored in this memory unit is equal to a coordinate signal newly output from the signal detecting device, and when the equal coordinate signals are continuously detected by the coordinate signal comparing device at a predetermined number, an error signal is output from an error output device.

REFERENCES:
patent: 4313109 (1982-01-01), Funk et al.
patent: 4476463 (1984-10-01), Ng et al.
patent: 4672558 (1987-06-01), Beckes et al.
patent: 4684801 (1987-08-01), Carroll et al.
patent: 4710759 (1987-12-01), Fitzgibbon
patent: 4761637 (1988-08-01), Lucas et al.
patent: 4801797 (1989-01-01), Ohouchi et al.
patent: 4812642 (1989-03-01), Hasegawa et al.
patent: 4845346 (1989-07-01), Ouchi et al.

Affiliated with

Also associated with

Rating

Optical coordinate input apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-178603