Method of finding the address of a zone indicated on a video scr

Details Method of finding the address of a zone indicated on a video scr Method of finding the address of a zone indicated on a video scr

1977-08-01

1979-03-27

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340711, 340749, G06K 1520

Patent

active

041468805

ABSTRACT:
On a video screen displaying lines of characters, a character position, wher displaying a character or blank, is found by means of a search performed after a light pen indicates the desired position. The search is performed by brightening the screen phosphor above its usual level of brightness with a search symbol that scans the character lines to determine the line of the character and then searches for its position along that line.

REFERENCES:
patent: 3569617 (1971-03-01), Allen et al.
patent: 3895375 (1975-07-01), Williams
patent: 3997891 (1976-12-01), Iwamura et al.

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