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Publication date
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Publication of CH524973A4publicationCriticalpatent/CH524973A4/xx
G04G9/0023—Visual time or date indication means by light valves in general
G04G9/0029—Details
G04G9/0047—Details electrical, e.g. selection or application of the operating voltage
G04G9/0052—Details electrical, e.g. selection or application of the operating voltage using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source
G—PHYSICS
G04—HOROLOGY
G04G—ELECTRONIC TIME-PIECES
G04G9/00—Visual time or date indication means
G04G9/0017—Visual time or date indication means in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light
