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:
Nov. 08, 1977
Filed:
Apr. 29, 1976
Kenichi Kondo, Tokyo, JA;
Abstract
A temperature compensating display device including a display operated by driving signals. A temperature detecting circuit periodically develops an oscillatory output signal having a frequency representative of ambient temperature, and the oscillatory signal is applied to a divider circuit for dividing the same. A selecting circuit receives the divided signal representative of ambient temperature and develops an oscillatory signal having a duty cycle representative of ambient temperature. A drive control circuit receives the selecting circuit output signal and voltage signals for developing driving signals and applying the driving signals to drive the display with the voltages at duty cycles corresponding to the duty cycles of the selecting circuit output signals. Accordingly, variations in driving voltages applied to the display compensate for ambient temperature variations, and this compensation is adjusted periodically each time the temperature detecting circuit develops its oscillatory output signal.