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:
Jun. 06, 1978
Filed:
Feb. 04, 1977
Michael Kaplit, Birmingham, MI (US);
Daniel B Hayden, Port Huron, MI (US);
George W Smith, Birmingham, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A liquid crystal cell having an internal resistance-type heating means for rapid cell warm-up, and for maintaining the cell at a predetermined temperature while it is operating as a visual display. The heating means comprises electrically symmetrical transparent films of resistance material on facing surfaces of transparent members sandwiching the liquid crystal material. The resistive films are covered with an insulating film, on which is disposed the control electrodes for the electro-optic display of the liquid crystal cell. Heating voltages, higher than those required to operate the visual display, can be safely applied in parallel across the films without interfering with a concurrent visual display.