Plasma panel light pen tracking using adaptive tracking scan

Details Plasma panel light pen tracking using adaptive tracking scan Plasma panel light pen tracking using adaptive tracking scan

1974-05-21

1976-04-06

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

315169TV, 340340, G06F 314

Patent

active

039493911

ABSTRACT:
A light pen tracking system and method particularly adapted for use with a plasma panel in which a first plurality of display sites on a display device are sequentially excited in such manner as to generate a signal which may be detected by a light pen. Upon detection of a first light signal, a second set of display sites centered at a location identified by the first signal and having smaller area than the first scanned area is then scanned. Because a relatively small area is scanned in the second scanning mode, and because the center of this smaller area has been localized by the previous signal detection, it is possible to more closely track rapid movements of a light pen on a display surface.

REFERENCES:
patent: 3576574 (1971-04-01), Baskin et al.
patent: 3651281 (1972-04-01), Mori
patent: 3651509 (1972-03-01), Ngo

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