Graphical display apparatus having a coordinate correction circu

Details Graphical display apparatus having a coordinate correction circu Graphical display apparatus having a coordinate correction circu

1985-09-03

1988-04-12

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340706, 340727, 340795, G09G 302

Patent

active

047377739

ABSTRACT:
In a graphical display apparatus having a writing pad and a display device, X- and Y-coordinate position signals are generated by the writing pad to indicate the position of a pen on a work area on the data entry surface of the pad. A correction circuit formed by discrete components is operated in a calibration mode to calibrate correction factors in response to the X- and Y-coordinate position signals so that when the pen is located successively in a plurality of reference coordinate work positions a cursor will appear successively in a plurality of reference coordinate positions of the display. In a data entry mode, the correction circuit corrects the X- and Y-coordinate position signals in accordance with the calibrated correction factors, so that the X and Y coordinates of the work area correspond to the X and Y coordinates of said display area. A mircoprocessor-based controller responds to the X- and Y-coordinate position signals supplied from the correction circuit by controlling the X-Y coordinate position of the cursor.

REFERENCES:
patent: 4295135 (1981-10-01), Sukonick
patent: 4315282 (1982-02-01), Schumacher
patent: 4514688 (1985-04-01), Whetstone
patent: 4523188 (1985-06-01), Huber
patent: 4543572 (1985-09-01), Tanaka et al.
patent: 4555590 (1985-11-01), Kishi et al.

Affiliated with

Also associated with

Rating

Graphical display apparatus having a coordinate correction circu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Graphical display apparatus having a coordinate correction circu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphical display apparatus having a coordinate correction circu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1432166