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:
Nov. 25, 2003
Filed:
Jan. 12, 2001
Helmut Bechtel, Roetgen, DE;
Hans Nikol, Aachen, DE;
Cornelis Ronda, Aachen, DE;
Thomas Jüstel, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A liquid crystal color display screen is provided with an electro-optical medium, two parallel transparent substrates by which the electro-optical medium is flanked, a device that influences the transmission state of the electro-optical medium, and a phosphor layer having at least two phosphors on the first substrate. A radiation source emits radiation having a maximum emission at a wavelength &lgr; <360 nm. The radiation source is situated at the side of the second substrate. The screen also includes a UV phosphor that transforms the radiation having a maximum emission at a wavelength &lgr; <360 nm to radiation having a maximum emission at a wavelength &lgr; >360 nm.