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:
Sep. 07, 1976
Filed:
Feb. 20, 1975
William Thomas Moore, London, EN;
The Rank Organisation Limited, London, EN;
Abstract
A liquid crystal analogue display device has a pair of electrodes between which a nematic liquid crystal material is disposed, so that the liquid crystal is switched from a homogeneous to a homeotropic state when the voltage between the electrodes exceeds a given threshold. A potential gradient is established along one of the electrodes, and a variable potential, within this gradient, is applied to the other electrode, for example from a fuel tank contents gauge. The position at which a low voltage or null, below the threshold switching potential, is established between the two electrodes will be dependent upon the magnitude of the variable voltage, so that by suitable illumination of the cell a movable display such as a line is obtained which is a direct analogue of the quantity represented by the variable voltage.