Horology: time measuring systems or devices – Displays or display device details – With luminous material
Patent
1995-10-27
1997-04-22
Miska, Vit W.
Horology: time measuring systems or devices
Displays or display device details
With luminous material
368238, G04B 1932, G04B 1904
Patent
active
056234562
ABSTRACT:
An improved electroluminescent indicator hand which is capable of emitting light from its entire surface area consists of an annular support member mounted on the hand shaft of a timepiece, an electroluminescent indicator hand secured on the support member, and a metal contact for supplying a drive signal to the electroluminescent indicator hand. The electroluminescent indicator hand is formed by sequentially laminating a transparent electrode layer, a luminescent layer, an insulating layer and a rear electrode layer on the rear surface of a light transmissive substrate, which has sufficient rigidity, and has at one end an annular section overlapping the support member. The metal contact has plural conductors resiliently contacting the transparent electrode layer and the rear electrode layer of the electroluminescent hand, and is welded to the support member so as to secure the electroluminescent member therebetween. Since a hand frame is not necessary, the cost of individual components and the assembly thereof is substantially reduced. In addition, it is possible to make the hand thinner than a conventional indicator hand. A desirable three-dimensional visual effect can be also achieved.
REFERENCES:
patent: 2655783 (1953-10-01), Uschkamp
patent: 3079748 (1963-03-01), Hultquist
patent: 4993005 (1991-02-01), Watanabe
patent: 4995022 (1991-02-01), Ikeda et al.
patent: 5265071 (1993-11-01), Thorgersen et al.
patent: 5320063 (1994-06-01), Ogura et al.
patent: 5346718 (1994-09-01), Thorgersen et al.
Miyamoto Shinichi
Tanaka Nobuhiro
Miska Vit W.
Seiko Clock Inc.
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