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US 5,669,486 AGranted
Illuminated switch
AssigneeFuji Polymeritech Co., Ltd.
InventorMitsunori Shima
Life of this patent
Estimating the term…
Abstract
A illuminated switch where a coned disc spring embossed into a dome shape with transparent thermoplastic resin is used on the top surface of a surface illuminant layer such as an EL element and where a feeling of click and better illumination are obtained.
Claims18
An illuminated switch comprising:
- an elastic surface illuminant layer;
- a conductive portion provided on a back surface of said elastic surface illuminant layer through an insulating layer;
- and a spring provided on a top surface of said elastic surface illuminant layer and having a click type transparent resin dome embossed into a dome shape with a transparent thermoplastic resin,
- the dome shaped portion of the spring being disposed so as to be positioned just above said conductive portion.
1 more element
An illuminated switch comprising:
- a display key;
- an illumination source comprised of an elastic surface illuminant layer;
- an insulating frame layer disposed adjacent to said illuminant layer;
- a conductive portion provided on said insulating layer on a back side of said elastic surface illuminant layer;
- and
- spring means including a click type transparent resin dome embossed into a dome shape spring portion with a transparent thermoplastic resin, said dome shaped spring portion being disposed so as to be positioned just above said conductive portion, wherein only said spring portion is disposed between said display key and said illuminant layer.
3 more elements
An illuminated switch comprising:
- a display layer;
- spring means including a click type transparent resin dome embossed into a dome shaped spring portion with a transparent thermoplastic resin, said dome shaped spring portion being part of a spring layer and being disposed adjacent to said display layer with no structural element disposed between said display key layer and said transparent resin dome;
- an illumination source consisting of an elastic surface illuminant layer providing substantially uniformly distributed illumination over a surface area, said illuminant layer being disposed adjacent to said dome shape spring portion with no structural element disposed between said spring layer and said illuminant layer;
- an insulating frame layer in contact with said illuminant layer;
- and
- a conductive portion layer provided on said insulating layer on a side of said insulating layer which is opposite said elastic surface illuminant layer, said dome shaped spring portion being disposed just above said conductive portion.
3 more elements
Dependencies are inferred from the claim text.