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:
Feb. 01, 1977
Filed:
Aug. 01, 1973
Allan Robert Kmetz, Richardson, TX (US);
Linda Truitt Creagh, Argyle, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A low current d.c. operated liquid crystal display comprises a liquid crystal material composition having impurities therein to effect a current density at 25.degree. C in the range of 0.5 to 3.0 .mu.a/cm.sup.2. In one aspect of the invention, the liquid crystal composition is provided by purifying the material to 99.95 percent or greater and then adding controlled amounts of preselected impurities so that the total amount of impurities in the liquid crystalline composition comprises 1/2 to 2 percent by weight. In another aspect of the invention, the liquid crystalline material is initially prepared so that it has a purity in the range of 98.0 to 99.5 percent by weight. An adsorbed layer may be formed on the electrodes to enhance electrical charge injection. In one specific embodiment, the liquid crystalline composition is utilized to form a display panel that is directly compatible with 12 volts d.c., which is typically available in automotive vehicles. In a different embodiment, the liquid crystal cell is utilized to form an electronically dimable mirror.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile