Touchscreen/keyboard scanner

Details Touchscreen/keyboard scanner Touchscreen/keyboard scanner

1984-05-07

1991-03-26

Eng, David Y.

Boots, shoes, and leggings

36492792, 36492799, 364942, G06Z 1300

Patent

active

050035053

ABSTRACT:
A computing system controlling is presented which controls input from both a keyboard and a touchscreen. Photo detectors placed in rows and columns along the edge of the touchscreen detect light beams directed across a surface on the touchscreen. The touchscreen indicates to the computing system controller addresses of which detectors do not detect light beams because an object is blocking the light beam path. The computing system controller calculates an average for the row addresses of detectors not detecting light beams, and an average for the column addresses of detectors not detecting light beams. The average is then sent to the host program.

REFERENCES:
patent: 3346853 (1967-10-01), Koster et al.
patent: 3755785 (1973-08-01), Kirk
patent: 4016548 (1977-04-01), Law et al.
patent: 4048632 (1977-09-01), Spence
patent: 4078257 (1978-03-01), Bagley
patent: 4264954 (1981-04-01), Briggs et al.
patent: 4281315 (1981-07-01), Bauer et al.
patent: 4374381 (1983-02-01), Ng
patent: 4459476 (1984-07-01), Weissmueller

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