Patent ID: 8614669

Claim:
A touchless tablet comprising: a camera that takes a picture of a form, a touchless sensing unit operatively coupled to the camera for identifying a touchless finger action above the form within a three dimensional (3D) ultrasonic sensory space; and a controller communicatively coupled to said touchless sensing unit, wherein said controller determines a location of form components in the picture captured by said camera, creates a virtual layout of virtual form components in a three-dimensional ultrasonic touchless sensing space based on the location of the form components in the picture; presents on a display a visual layout of visual form components also based on the location of the form components in the picture, applies a combinational weighting of a Time of Flight (TOF) ultrasonic distance measurement corresponding to a coarse estimated location of the finger and a differential Time of Flight (dTOF) ultrasonic measurement corresponding to a relative displacement as the finger accelerates or decelerates between a far distance and a close distance; creates a vector from a first location at the far distance to a second location at the close distance for a forward finger movement, or, a vector from the first location at the close distance to the second location at the far distance for a retracting finger movement in the ultrasonic sensory space; and predicts a destination of the finger on said form from said vector to provide zoom in and zoom out and associates the touchless finger action in the ultrasonic sensory space on at least one virtual form component in the virtual layout of the three-dimensional ultrasonic touchless sensing space with at least one visual form component of the visual layout on said form and presented on the display based on the predicted destination, wherein said touchless tablet identifies a selection of said virtual form component based on said location and action of said finger in the three-dimensional ultrasonic touchless sensing space.