Touch pad system

Details Touch pad system Touch pad system

2011-08-09

2011-08-09

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S175000, C178S018090

Reexamination Certificate

active

07995039

ABSTRACT:
Radiation guided by Total Internal Reflection inside a solid element from a point of engagement of a reflecting/emitting/scattering object and toward a detector reaches an area of the solid element on which the surface has areas preventing reflection of the radiation back into the element. This provides a spatial modulation of the radiation reaching the detector through one of the surfaces of the solid element. From this spatial modulation, the position of engagement may be determined.

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