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:
Apr. 14, 1998
Filed:
May. 08, 1996
Neung-yong Yun, Seoul, KR;
Hak-cheol Yang, Kyungki-do, KR;
Samsung Display Devices Co., Ltd., Kyungki-do, KR;
Abstract
A double cross-over type electron gun for a color CRT is provided. The electron gun includes a triode having a cathode, a control electrode and a screen electrode, for generating and controlling an electron beam, a plurality of focus electrodes sequentially disposed adjacent to the triode, for forming at least one auxiliary lens, and a final accelerating electrode disposed adjacent to the focus electrode, for forming a main lens. The electron beam generated by the triode includes a cross-over point in front of the main lens and proximate to the auxiliary lens. At least one of the auxiliary lenses disposed upstream from the main lens is formed as a quadrupole lens so that the position of the cross-over point in the horizontal direction and that in the vertical direction are different from each other. When a dynamic focusing voltage is applied, the image quality at the periphery of a screen can be greatly improved.