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Switch unit capable of directly illuminating switch operating position
| Details |
Inventors: Hirahata, Hiroshi; Teruyama, Shuuji;
Assignee: Mitsumi Electric Co., Ltd. (Tokyo, JP)
Primary Examiner: Friedhofer; Michael A.
Assistant Examiner:
Attorney, Agent or Firm: Ladas & Parry LLP
A switch unit includes a first sheet member that includes a movable contact. A second sheet member is provided on the first sheet member. The second sheet member includes a light-emitting part and wiring. The wiring supplies power to the light-emitting part. The wiring is made of a conductive polymer. |
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DETAILED DESCRIPTION A general object of the present invention is to provide an improved and useful switch unit in which one or more of the above-mentioned problems are eliminated.
Another and more specific object of the present invention is to provide a switch unit capable of directly illuminating a switch operating position while reducing the thickness and rigidity thereof.
In order to achieve the above-mentioned objects, according to one aspect of the present invention, there is provided a switch unit including: a first sheet member including a movable contact; and a second sheet member provided on the first sheet member and including a light-emitting part and wiring that supplies power to the light-emitting part; wherein the wiring is made of a conductive polymer.
A conductive polymer is more flexible than the conventionally used ITO (indium-tin oxide).
In addition, differing from the ITO, a conductive polymer is not formed by deposition.
Hence, there is substantially no limitation to the thickness of a base member and thus it is possible to reduce the thickness of the base member.
Accordingly, it is possible for the light-emitting part to emit high-intensity light without variation while reducing the thickness and rigidity of the second sheet member.
In an embodiment of the present invention, the light-emitting part and the movable contact may be arranged to face to each other at least partially.
According to this embodiment, since the light-emitting part and the movable contact are arranged to face to each other at least partially, a portion subjected to a switch operation by a user is directly illuminated.
Hence, it is possible to increase the usability of the switch unit.
In an embodiment of the present invention, the conductive polymer may be transparent.
According to this embodiment, since an uncolored transparent conductive polymer is used, it is possible to transmit the color of light emitted from the light-emitting part as it is to the outside without being affected by the conductive polymer
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