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:
Aug. 11, 1998
Filed:
Jan. 30, 1997
Peter Brandt, Babenhausen, DE;
Dietmar Tippl, Kelkheim, DE;
VDO Adolf Schindling AG, Frankfurt, DE;
Abstract
In a display device having a TN liquid crystal cell which can be illuminated by transmitted light from a source of light, the nematic liquid crystal substance of which cell contains a coloring substance. The control regions of the TN liquid crystal cell can be acted on by an actuation voltage between an actuation level and a non-actuation level of the electro-optic characteristic curve, in which connection bright signs can be shown on a dark display surface by the liquid crystal cell. The liquid crystal cell can be acted on by an actuation voltage between the actuation level and a non-actuation level in the undershoot region of the characteristic having the least transmission.