Absolute position mouse

Details Absolute position mouse Absolute position mouse

1985-06-21

1987-08-11

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

340710, 250237R, G08C 2100

Patent

active

046863290

ABSTRACT:
Apparatus for determining the absolute position of a point on a surface including a tablet or overlay and a moveable mouse-type cursor. The tablet includes a unique pattern of lines or regions along rectilinear or other axes. A series of adjacent spaces formed by the lines define unique cells on the tablet. The mouse includes a pair of linear imaging arrays adapted to detect the presence of tablet lines adjacent thereto. An integrated processor identifies the line types, computes line spacings and ratios, and identifies subtending cells by comparison to the known tablet topography. The processor further computes the precise location of a point defined on the mouse.

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patent: 4411016 (1983-10-01), Wakeland
patent: 4543571 (1985-09-01), Bilbrey et al.
patent: 4564835 (1986-01-01), Dhawan

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