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. 19, 2003
Filed:
Feb. 20, 2001
Albertus Aemilius Seyno Sluyterman, Eindhoven, NL;
Nicolaas Gerrit Vink, Eindhoven, NL;
Tjerk Gerrit Spanjer, Eindhoven, NL;
Leopold Cyrille Maria Beirens, Eindhoven, NL;
Antonius Henricus Van Tiel, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A color display device having an in-line electron gun ( ) for generating three electron beams ( ), and a convergence unit ( ′) to dynamically influence the convergence of the electron beams, preferably to decrease a distance (p) between the electron beams. The convergence unit ( ′) includes a ring-shaped element ( ′) having coils ( ′) formed by electrically conductive wires, which have been toroidally wound in a winding direction and according to a winding density distribution N (&phgr;) given by N (&phgr;)=N cos ( &phgr;)+C where &phgr; is an angle enclosed by the X-direction and a line between an element of the coil and the center, which ranges between 0° and 360°, N is a given winding density, the sign of N (&phgr;) denotes the winding direction, and C is a constant different from zero, and preferably equal to −N .