Method for displaying box cursors

Details Method for displaying box cursors Method for displaying box cursors

1986-06-02

1989-05-09

Yusko, Donald J.

Communications: electrical

Land vehicle alarms or indicators

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

340706, G09G 116

Patent

active

048292923

ABSTRACT:
Box cursors consisting of lines of identical thickness are displayed using a bit inverting technique so that overlapped portions of the cursors may be differentiated. Masks are prepared, one for each of the box cursors, which have patterns which, when exclusive ORed, result in a pattern including 1 bits. The box cursors are generated having lines corresponding to respective ones of the masks. Thus, even though box cursors may overlap on the display, the side or sides of the overlapping cursors will be displayed as a pattern of pel points corresponding to the pattern including 1 bits.

REFERENCES:
patent: Re31200 (1983-04-01), Sukonick et al.
patent: 3659205 (1972-04-01), Baer et al.
patent: 3868673 (1975-02-01), Mau et al.
patent: 4093221 (1978-06-01), Dash
patent: 4190835 (1980-02-01), Buynak
patent: 4400780 (1983-08-01), Nagao et al.
patent: 4495491 (1985-01-01), Postl
patent: 4628444 (1980-12-01), Nozawa et al.

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