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:
Dec. 17, 2002
Filed:
Feb. 24, 2000
David L. Burton, McMinnville, OR (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A liquid crystal display (LCD) device temperature compensation control system and associated methodologies that controls the contrast voltage provided to the LCD device based on the ambient temperature to enable the LCD to display data beyond the normal, manufacturer-specified operational temperature range. The LCD contrast ratio is dependent upon ambient temperature and contrast voltage. The invention controls the contrast voltage supplied to the LCD device such that it operates in either a standard or extended operating range based on ambient temperature to achieve an optimum contrast ratio. The invention may also adjust the frame rate and/or data inversion state of the displayed data.