US 8,284,173 B2 · System and method of detecting contact on a display

Abstract

A system for detecting contact on a display is provided. The system comprises a planar medium associated with the display and includes at least one edge facet and opposing surfaces. The system also includes one or more optical sources operatively coupled to the at least one edge facet for transmitting an optical signal into the planar medium such that the transmitted optical signal is totally internally reflected between the at least one edge facet and opposing surfaces. An optical sensing device is positioned to substantially face at least a portion of the edge facet and adapted to detect at least one object contacting a first surface of the opposing surfaces. The optical sensing device is operative to detect a portion of the optical signal emitted from the first surface at a location corresponding to the object contacting the first surface.

Claims73

Dependent claims

A system for detecting contact on a surface, the system comprising:

a planar medium including at least one edge facet and opposing surfaces;
at least one optical source operatively coupled to the at least one edge facet for transmitting an optical signal into the planar medium such that the transmitted optical signal is totally internally reflected between the at least one edge facet and the opposing surfaces;
and
at least two optical sensing devices each positioned to generally face across one of the opposing surfaces and adapted to detect at least one object contacting the one surface, wherein the at least two optical sensing devices are operative to sense a portion of the optical signal emitted from the one surface at a location corresponding to the at least one object contacting the first surface.

1 more element

Dependencies are inferred from the claim text.

System and method of detecting contact on a display

Life of this patent

System and method of detecting contact on a display

Life of this patent

Abstract

Claims73