An optical input device comprising at least one optically clear plate (56) having at least one light source (7) positioned at a peripheral edge thereof arranged and configured to transmit frequency modulated light into said optically clear plate (56) along its planar length at an angle such that said modulated light...

A touch sensitive apparatus comprises: a top plate having one or more light sources associated therewith, such that light from the one or more light sources is transmitted within the top plate with total internal reflection; a base plate, wherein light is transmissible within the base plate, wherein the base plate c...

A touch sensitive apparatus comprises: a top plate comprising a plurality of touch detection regions, and having one or more light sources associated therewith, such that light from the one or more light sources is transmitted within the top plate with total internal reflection; a plurality of detectors for detectin...

A packaged light emitting diode (109) comprises a light emitting diode die (110) and a cylindrical lens (112). The cylindrical lens is provided directly over a light emitting surface of the light emitting diode die. The cylindrical lens (112) is advantageously provided as a truncated substantially oblate ellipsoidal...

Optical System Manufacture A method of manufacturing an optically transmissive sheet is described. The method comprises moulding the optically transmissive sheet as a laminate, wherein the optically transmissive sheet is adapted for total internal reflection at first and second faces of the optically transmissive sh...

A touch sensitive apparatus comprises: a top plate having one or more light sources associated therewith, such that light from the one or more light sources is transmitted within the top plate with total internal reflection; and a base plate having one or more detectors associated therewith for detecting light trans...

Optical System and Devices A touch sensitive apparatus comprises a top plate and a base plate. The top plate has one or more light sources associated with it, such that light from the plurality of light sources is transmitted within the top plate with total internal reflection. The base plate has one or more detecto...

A touch sensitive apparatus comprises: a top plate having a plurality of light sources associated therewith, such that light from the plurality of light sources is transmitted within the top plate with total internal reflection; and a base plate having one or more detectors associated therewith for detecting light t...