Optical waveguide for touch panel

Details Optical waveguide for touch panel Optical waveguide for touch panel

2008-01-25

2009-11-03

Wong, Tina M (Department: 2874)

Optical waveguides

Planar optical waveguide

C345S175000, C345S176000, C345S177000, C345S179000, C365S004000, C365S132000

Reexamination Certificate

active

07613375

ABSTRACT:
An optical waveguide for a touch panel which obviates a need for positioning a light receiving optical waveguide portion. The touch panel optical waveguide A1which is to be fitted around a periphery of a display screen of a display of a touch panel, the optical waveguide comprising light emitting cores3each having an end face provided on one of opposed portions disposed in opposed relation on opposite sides of the display screen of the display, and light receiving cores3each having an end face provided on the other of the opposed portions, wherein the cores3are provided on a surface of a planar frame-shaped under-cladding layer (frame)2having a shape conformable to the periphery of the display screen of the display.

REFERENCES:
patent: 2002/0088930 (2002-07-01), Graham et al.
patent: 2004/0201579 (2004-10-01), Graham
patent: 2005/0089298 (2005-04-01), Maxwell et al.
patent: 2006/0001653 (2006-01-01), Smits
patent: 2006/0002655 (2006-01-01), Smits
patent: 2007/0285406 (2007-12-01), Kukulj et al.
patent: 1701188 (2006-09-01), None
patent: 2004/001463 (2003-12-01), None
European Search Report dated Jul. 20, 2009, issued in corresponding European Patent Application No. 08001345.

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