The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1976
Filed:
Jan. 11, 1974
Izuhiko Nishimura, Suwa, JA;
Tadashi Sano, Suwa, JA;
Kabushiki Kaisha Seikosha, Tokyo, JA;
Abstract
A timepiece having a quartz crystal vibrator serving as a time standard, a digital display, and integrated divider and C-MOS transistor driving circuits for dividing the high frequency signal from the vibrator into low frequency timing signals for the direct driving of the liquid crystal display. A battery energizes the vibrator and divider circuits but the voltage thereof is insufficient for energizing the display driving circuits. Said voltage is stepped up by a circuit including a rectifier circuit monolithically integrated on the same substrate as said complementary coupled transistor integrated driving circuit and produces a voltage sufficient to energize the driving circuit.