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:
May. 24, 1983
Filed:
Jun. 05, 1980
Larry L Miles, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and system for driving a liquid crystal display (LCD) with adjustable drive voltages to match selected ones of a number of different liquid crystal materials utilize variable duty cycle control. Instead of regulating the battery supply voltage to provide desired driving voltage, the driving voltage is disabled for preselected portions of each cycle thereby controlling the root mean square voltage across the LCD segments during both the display-on and display-off states of each display segment to match the liquid crystal material. Two-, three- and four-way multiplexing or any other level of multiplexing may be used in conjunction with this method and system.