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. 07, 2002
Filed:
Feb. 06, 2001
Hironobu Yasui, Tokyo, JP;
Akinori Heishi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A CRT display apparatus including a CRT having an electron gun is disclosed. The electron gun includes a cathode, a G electrode, a G electrode, and a G electrode disposed in that order for drawing electrons from the cathode. The electron gun further includes a modulating Gm electrode disposed between the G electrode and the G electrode. The CRT display apparatus is provided with a current measuring circuit measuring a current flowing through the Gm electrode and a controller for controlling a value of a voltage applied to the Gm electrode according to a value of the current measured by the current measuring circuit for the purpose of preventing the electron beam flowing from the electron gun to the screen of the CRT from becoming excessive.