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:
Jul. 09, 2002
Filed:
Jul. 29, 1999
Friederike Picht, Düren, DE;
Wolfram Czarnojan, Aachen, DE;
Claus Feldmann, Aachen, DE;
Hans-Otto Jungk, Aachen, DE;
Jacqueline Merikhi, Aachen, DE;
Roel Van De Belt, Eindhoven, NL;
Anne M. A. Van Dongen, Eindhoven, NL;
Alexandra J. Heijden, Eindhoven, NL;
Koninlijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
A display screen, in particular a color display screen for a cathode ray tube, comprises a phosphor layer which includes a phosphor composition of a phosphor with a coating comprising a water-soluble organic binder, which is selected from the group formed by the polyurethanes, polyacrylamides, polyamide resins, etherified melamine compounds and melamine-formaldehyde compounds, and etherified urea-formaldehyde resins, and comprising oxygen compounds of one or more elements selected from the group formed by the alkaline earth elements and zinc. Important advantages obtained are a substantially improved sieving behavior of the phosphor powder, an increased adhesion of pigment particles to the phosphor grains, an improved suspension stability as well as an improved adhesion of the phosphor to the display screen glass.