Optical waveguide for touch panel

Details Optical waveguide for touch panel Optical waveguide for touch panel

2008-01-09

2009-12-01

Petkovsek, Daniel (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S126000, C345S176000

Reexamination Certificate

active

07627209

ABSTRACT:
An optical waveguide for a touch panel which is arranged for prevention of breakage of bending portions thereof and reduction in light loss. The optical waveguide for a touch panel is configured in a band shape so as to be wrapped around a periphery of a display of the touch panel with a bending portion thereof being positioned at a corner of the periphery of the display, and comprises a core, an under-cladding layer and an over-cladding layer which cooperatively enclose the core, and a reinforcement layer provided at least on a surface portion of the under-cladding layer present on an outer side of the bending portion, wherein the over-cladding layer is absent on an inner side of the bending portion.

REFERENCES:
patent: 7412119 (2008-08-01), Smits
patent: 7471865 (2008-12-01), Graham
patent: 2006/0001655 (2006-01-01), Tanabe
patent: 2008/0074402 (2008-03-01), Cornish et al.

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