Crt cursor scan control circuits

Details Crt cursor scan control circuits Crt cursor scan control circuits

G - Physics

06

F

375/11

G06F 3/153 (2006.01) G09G 3/00 (2006.01) G09G 5/08 (2006.01) H03M 11/10 (2006.01) H03M 11/20 (2006.01)

Patent

CA 1058781

ABSTRACT OF THE DISCLOSURE The present invention relates to CRT data terminals, and more particularly to cursor control circuits that control the scanning position of a cursor character on a CRT portion of the terminal. In the past, when more than one position movement was desired by a cursor, it was necessary for the terminal operator to repeatedly depress a single cursor key until the number of depressions relate to the desired cursor location. The present invention achieves control of the scanning motion of a cursor on a CRT in a desired direction by providing an apparatus such that the prolonged depression of a cursor scan control key on a CRT terminal keyboard generates a unique coded signal that is fed to a gating circuit. Prolonged depression is further detected by an astable circuit that generates repeated enabling pulses to the gating circuit so that the coded signal is repeatedly transferred to a separate programmable control unit. The unit is programmed to translate the repeated signals to a cursor scan command for a CRT which forms a part of the terminal.

260987

Affiliated with

Also associated with

Rating

Crt cursor scan control circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Crt cursor scan control circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crt cursor scan control circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1129115