Scheme for determining position of surface contact of cathode ra

Details Scheme for determining position of surface contact of cathode ra Scheme for determining position of surface contact of cathode ra

1990-06-18

1992-06-02

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

340706, G09G 100

Patent

active

051190753

ABSTRACT:
A touch-screen scheme is employed in an arrangement wherein an inquiry and a choice of responses thereto are displayed on a CRT screen. In accordance with this scheme, a first touch-screen device is held against a predetermined spot on the screen. A selection is made by holding a second touch-screen device against the area of the screen corresponding to the desired response. When the electron beam which scans the CRT screen sweeps across the first and second touch-screen devices at different times, the two device generate two signal outputs. The touch-position or the selection is determined based on the time difference between the two signal outputs.

REFERENCES:
patent: Re32282 (1986-11-01), Baer
patent: 3551896 (1970-12-01), Baskin et al.
patent: 3728480 (1973-04-01), Baer
patent: 4329684 (1982-05-01), Monteath et al.
patent: 4789836 (1988-12-01), May
patent: 4999617 (1991-03-01), Uemura et al.

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