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Title:
ELECTRONIC CLOCK
Document Type and Number:
Japanese Patent JPS524879
Kind Code:
A
Abstract:

PURPOSE: Prevent lowering of liquid crystal life by impressing an AC voltage below the threshold value to the liquid crystal by the output of a detection means when the intensity of external light becomes lower than a predetermined value.


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Inventors:
WASHITSUKA ISAO
NAKAGAWA HAKUEI
Application Number:
JP8129475A
Publication Date:
January 14, 1977
Filing Date:
June 30, 1975
Export Citation:
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Assignee:
SHARP KK
International Classes:
G09G3/18; G02F1/133; G04G9/00; G04G17/02; G04G17/06; G04G99/00; (IPC1-7): G04C17/00
Domestic Patent References:
JPS4971550A1974-07-10



 
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