초록 ▼

A computer control includes a control member movably mounted for movement in two dimensions wherein orthogonally related gratings are moved to the corresponding directions to generate pairs of quadrature related signals. Circuitry produces binary signals defining four states for each cycle of quadra

A computer control includes a control member movably mounted for movement in two dimensions wherein orthogonally related gratings are moved to the corresponding directions to generate pairs of quadrature related signals. Circuitry produces binary signals defining four states for each cycle of quadrature signals to change a corresponding count indicating position of the control member. In another variation patterns each having a plurality of spots with a unique combination of gray levels are sensed by a rectangular array of photosensers to determine the position of the movable member.

대표청구항 ▼

A computer control comprising a housing, a finger element extending above the housing and adapted to be gripped and moved by fingers in at least two dimensions to selected positions, a pair of movable members mounted in the housing and coupled to the finger element for movement in respective orthogo

A computer control comprising a housing, a finger element extending above the housing and adapted to be gripped and moved by fingers in at least two dimensions to selected positions, a pair of movable members mounted in the housing and coupled to the finger element for movement in respective orthogonal directions in response to corresponding movement of the finger element, each of said pair of movable members including a light control grating defining alternating light and dark patterns along the corresponding direction of movement, light emitting means and light responsive means disposed alongside each of the respective light control gratings for responding to light changes due to movement of each respective grating relative thereto wherein each light responsive means generates a pair of signals having opposite quadrature related phases for indicating motion in respective plus and minus directions of movement, and means responsive to the pairs of signals for providing digital data corresponding to the two dimensional position of the control member.