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:
Dec. 16, 2003
Filed:
Dec. 15, 2000
Tetsuya Shiroishi, Tokyo, JP;
Syuhei Nakata, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A CRT electron gun of the present invention has a cathode for emitting electrons toward a screen as a display face, a G electrode to which a voltage higher than that of the cathode is applied, a Gm electrode to which a predetermined voltage is applied, and a G electrode to which a voltage higher than that of the G electrode is applied, wherein at least those three electrodes are provided with an electron-passing opening and are arranged on the same axis in that order from the side of the cathode, and the potential of the aforementioned cathode is varied to vary the amount of electrons to be drawn; and in this, a configuration is made such that the lowest potential on the axis in a portion where the aforementioned Gm electrode exists substantially agrees with the maximum potential in a range where the potential of the aforementioned cathode varies, and a part of the electrons drawn from the aforementioned cathode flows into at least one of the aforementioned G electrode and the aforementioned Gm electrode.