Patent ID: 7834847

Claim:
A non-scanning ultrasonic system for touchless control comprising: an ultrasonic touchless sensing unit, wherein said ultrasonic touchless sensing unit detects at least one activation cue from a finger in a three-dimensional ultrasonic touchless sensing space; and a controller communicatively coupled to said sensing unit, wherein said controller activates and adjusts a touchless control according to the finger's location and acceleration in one of a plurality of elliptic banded boundary regions of the three-dimensional ultrasonic touchless sensing space in response to said activation cue; where the ultrasonic touchless sensing unit: acquires the touchless control responsive to detecting a first pause or first accelerated finger movement in a first inner banded elliptical boundary region of the three-dimensional ultrasonic touchless sensing space, and releases the touchless control responsive to detecting a second pause or second accelerated finger movement in a second outer banded elliptical boundary region of the three-dimensional ultrasonic touchless sensing space.