发明名称 |
Display device for electronic timepieces |
摘要 |
An illuminating device provided adjacent the liquid crystal display device of an electronic timepiece having a light emitting element composed of tritium (3H). The light emitting element is sealed with a resin without hydrogen atoms, such as chlorotrifluoroethylene resin or polytetrafluoroethylene for preventing the leakage of 3H of tritium.
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申请公布号 |
US4243303(A) |
申请公布日期 |
1981.01.06 |
申请号 |
US19790016570 |
申请日期 |
1979.03.01 |
申请人 |
CITIZEN WATCH CO., LTD. |
发明人 |
ENOMOTO, TADAO;ITO, NOBUO |
分类号 |
G01D7/00;G02F1/1335;G04G9/00;G09F9/00;(IPC1-7):G02F1/13 |
主分类号 |
G01D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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