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:
May. 16, 2006
Filed:
Oct. 24, 2002
Nijs Cornelis Van Der Vaart, Eindhoven, NL;
Martin Gerard Hendrik Hiddink, Eindhoven, NL;
Siebe Tjerk DE Zwart, Eindhoven, NL;
Antonius Hendricus Maria Holtslag, Eindhoven, NL;
Theunis Siemen Baller, Eindhoven, NL;
Hans-helmut Bechtel, Roetgen, DE;
Georg Friedrich Gaertner, Aachen, DE;
Nijs Cornelis Van Der Vaart, Eindhoven, NL;
Martin Gerard Hendrik Hiddink, Eindhoven, NL;
Siebe Tjerk De Zwart, Eindhoven, NL;
Antonius Hendricus Maria Holtslag, Eindhoven, NL;
Theunis Siemen Baller, Eindhoven, NL;
Hans-Helmut Bechtel, Roetgen, DE;
Georg Friedrich Gaertner, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a vacuum display device comprising a display screen () having picture elements (), cathode means () for generating a plurality of electron beams (EB), each corresponding to one of the picture elements (), and addressing means () for addressing the picture element () through modulation of the intensity of an electron beam corresponding to the picture element (). A channel structure () is arranged adjacent the cathode means (). The channel structure () comprises a plurality of electron beam guidance cavities (), each corresponding to one of the picture elements (), and protects the cathode means () from incident ions. The exit () of the cavity () is smaller than the entrance (), so that an electron beam (EB) exiting from the cavity () has a particularly high brightness and spatial uniformity.