Variable thickness EL lamp

Details Variable thickness EL lamp Variable thickness EL lamp

2007-11-13

2007-11-13

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S500000, C313S510000, C313S511000, C313S512000

Reexamination Certificate

active

10834591

ABSTRACT:
An EL panel on a rigid substrate is thinned in selected areas, or overall, to provide a backlight for keypads and other applications that would otherwise require a more flexible panel or additional structure. Lamp materials are deposited on one side of a rigid substrate and then substrate material is ablated with a suitable tool, working from the opposite side of the substrate as the lamp materials. The depth of cut can be constant or variable, enabling one to tailor the flexibility of an area to the desired tactile response for a keypad or to provide clearance in close quarters. The invention is compatible with known process for making an EL panel.

REFERENCES:
patent: 5573807 (1996-11-01), LaPointe
patent: 5780965 (1998-07-01), Cass et al.
patent: 6280559 (2001-08-01), Terada et al.
patent: 6551440 (2003-04-01), Tanaka
patent: 6866555 (2005-03-01), Tsutsui et al.
patent: 6956561 (2005-10-01), Han
patent: 2001/0037933 (2001-11-01), Hunter et al.
patent: 2004/0043191 (2004-03-01), Zovko
patent: 2006/0055314 (2006-03-01), Nakamura et al.
patent: 11026166 (1999-01-01), None

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