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. 10, 2001
Filed:
Aug. 22, 1995
Edwin A. Montie, Eindhoven, NL;
Jeroen Van Engelshoven, Eindhoven, NL;
Ronald van der Wilk, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A cathode ray tube includes an electron gun having a beam-shaping portion (,) for generating electron beams (,), a prefocusing system (,) of electrodes (,) across which a prefocusing voltage is supplied during operation so as to form an electron-optical prefocusing lens, and a main lens system (,) of electrodes (,) across which a main lens voltage is applied during operation so as to form an electron-optical main lens. The electrodes (,) are provided with securing means (,) for connection to an insulating supporting body (,) and with apertures (,) for passing the electron beams (,). Electrode (,) protrudes toward electrode (,) in such a way that the mutual distance (l,) between the two electrodes at the location of the apertures (,) therein is smaller than their mutual distance (l,) at the location of their respective securing means (,). The two electrodes (,) are spaced apart at the location of the apertures (,) substantially at a distance limited by electrostatic breakdown.