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. 04, 2003
Filed:
Jan. 23, 2002
Daniel Den Engelsen, Eindhoven, NL;
Ivo Maria Martinus Durlinger, Eindhoven, NL;
Hideo Kikuchi, Wakaba-ku, JP;
Masaharu Watanabe, Kitasoumagun, JP;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A screen for a color display tube or display window has a structure of apertures in a black matrix and electro-luminescent material in the apertures. Steps in producing the screen include applying the black matrix and the electro-luminescent material, and exposing photosensitive material on the display window to light emitted by a light source and passed through a lens system and a shadow mask. The shadow mask is suspended from the display window and the lens system is positioned between the light source and the shadow mask. On the screen, the lens system realizes a microscopic light distribution of the light originating from the light source radiating towards the screen. The photosensitive material includes a bleaching dye functioning as a contrast enhancer in at least one of the process steps.