Contact detection device, apparatus using such a device and radiotelephone comprising such an apparatus
First Claim
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1. A contact device comprising:
- a first insulating film having a dome and a planar surface surrounding said dome;
a contact electrode formed on an inner surface of said dome;
a second insulating film;
a detection circuit located over said second insulating film, said detection circuit detecting an electric contact between said contact electrode and said detection circuit; and
an electroluminescent layer formed on said planar surface of said first insulating film having said dome, wherein said planar surface is located between a portion of said detection circuit and said electroluminescent layer, and said dome is contactable by a contact pin.
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Abstract
A contact device includes a first insulating film having a dome and a planar surface surrounding the dome. A contact electrode is formed on an inner surface of the dome. A detection circuit is located over a second insulating film. The detection circuit detects an electric contact between the contact electrode and the detection circuit. An electroluminescent layer is formed on the planar surface, where the electroluminescent layer does not overlap over the contact electrode and is formed on the planar surface without being formed on the dome.
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Citations
14 Claims
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1. A contact device comprising:
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a first insulating film having a dome and a planar surface surrounding said dome;
a contact electrode formed on an inner surface of said dome;
a second insulating film;
a detection circuit located over said second insulating film, said detection circuit detecting an electric contact between said contact electrode and said detection circuit; and
an electroluminescent layer formed on said planar surface of said first insulating film having said dome, wherein said planar surface is located between a portion of said detection circuit and said electroluminescent layer, and said dome is contactable by a contact pin. - View Dependent Claims (2, 3, 4, 5)
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6. A communication apparatus comprising a keyboard having keys, wherein each of said keys is capable of exerting pressure on a corresponding dome of a contact device;
- said contact device comprising;
a first insulating film having said dome and a planar surface surrounding said dome;
a contact electrode formed on an inner surface of said dome;
a second insulating film;
a detection circuit located over said second insulating film, said detection circuit detecting an electric contact between said contact electrode and said detection circuit; and
an electroluminescent layer formed on said planar surface of said first insulating film having said dome, wherein said planar surface is located between a portion of said detection circuit and said electroluminescent layer, and said dome is contactable by a contact pin. - View Dependent Claims (7, 8, 9, 10, 11)
- said contact device comprising;
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12. A method of forming a contact device comprising:
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forming a first insulating film having a dome and a planar surface surrounding said dome;
forming a contact electrode on an inner surface of said dome;
forming a second insulating film;
forming a detection circuit located over said second insulating film, said detection circuit detecting an electric contact between said contact electrode and said detection circuit; and
forming an electroluminescent layer on said planar surface of said first insulating film having said dome, wherein said planar surface is located between a portion of said detection circuit and said electroluminescent layer, and said dome is contactable by a contact pin. - View Dependent Claims (13, 14)
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Specification