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. 25, 1998
Filed:
Feb. 10, 1997
Nicolaas Lambert, Eindhoven, NL;
Theunis S Baller, Eindhoven, NL;
Gerardus G Van Gorkom, Eindhoven, NL;
Edwin A Montie, Eindhoven, NL;
Petrus H Trompenaars, Eindhoven, NL;
Siebe T De Zwart, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The thin-type display device (1) with a vacuum envelope has a transparent front wall (3), which is provided with a display screen, and at least an electron source (5) and a duct structure, which cooperates with the electron source (5) and which extends substantially parallel to the front wall (3). Ducts (6, 6', 6') of the duct structure serve as electron-propagation means and are provided with walls (11, 11', 11') of an electrically insulating material having a secondary emission coefficient which is suitable for electron propagation. In the display device (1) 1.ltoreq.s/w.ltoreq.5 and s.multidot.w.gtoreq.5 mm.sup.2, where s is the depth of the ducts (6, 6', 6') and w is the width of the ducts (6, 6', 6'). Preferably, the width w.gtoreq.1.5 mm and the depth 3.5.ltoreq.s.ltoreq.15 mm. The voltage difference over the length of the ducts (6, 6', 6'), measured parallel to the front wall (3), is less than 75 V/cm, preferably less than 40 V/cm.