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:
Sep. 02, 2003
Filed:
Apr. 12, 2002
Tetsuo Funakura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A cathode ray tube has a three-gun type electron gun. The electron gun includes a cathode, a G electrode, a G electrode aligned in line in this order, the G electrode and the G electrode having beam-passing holes formed therein. A supporting member supports the cathode in position. A GM electrode is added between the G and G electrodes and has a beam-passing hole smaller than the holes formed in the G electrode and the G electrode. The supporting member and the G electrode are formed with measurement holes. The G electrode may also be formed with a measurement hole therein. A measurement element is inserted through the measurement holes to measure a distance between the G electrode and the G electrode, and a distance between the GM electrode and the G electrode.