Input/output apparatus and method therefor

Details Input/output apparatus and method therefor Input/output apparatus and method therefor

1990-03-22

1991-10-22

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2106

Patent

active

050597493

ABSTRACT:
An input/output apparatus includes a coordinate input device and a display device which are stacked on each other. The coordinate input device detects position coordinates of an input designating device by (a) intermittently transmitting radio waves from a tablet to excite a tuned circuit incorporated in the input designating device and (b) receiving radio waves generated by the tuned circuit while transmission of radio waves by the tablet is suspended. The times while the display data latch pulses are generated in the display device is synchronized with the transmission of radio waves from the tablet in the coordinate input device. In consequence, noise is not generated in synchronism with the generation of the display data latch pulses while the tablet receives the radio waves, so noise is not imposed on a signal received by the tablet. As a result, there is no reduction in the accuracy with which position is detected on the basis of the received radio waves and malfunction of the apparatus is substantially eliminated.

REFERENCES:
patent: 4848496 (1989-07-01), Murakami

Affiliated with

Also associated with

Rating

Input/output apparatus and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Input/output apparatus and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input/output apparatus and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-109762