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:
Mar. 12, 2002
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A cathode-ray tube comprising an electron gun ( ) disposed in the neck portion ( ) of a funnel ( ), a deflection yoke ( ) having a horizontal deflection coil ( ) and a vertical deflection coil ( ) mounted on the outer surface of the funnel ( ) in a position closer to the front panel than the electron gun ( ), and a speed modulation coil ( ) mounted on the outer surface of the neck portion ( ). The speed modulation coil ( ) is so disposed that the end part thereof on the front panel side is closer to the electron gun ( ) than the end part of the horizontal deflection coil ( ) facing the electron gun ( ) and closer to the front panel side the end part of the electron gun ( ) facing the front panel. A desired speed modulation effect can be attained because the speed modulation magnetic field ( ) of the speed modulation coil ( ) does not interfere with the deflection magnetic field and can be prevented from disappearing by causing by causing an eddy current in a top unit ( ).