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:
Jan. 11, 2000
Filed:
Jul. 30, 1997
Richard M Gorski, Arlington Heights, IL (US);
Kenneth A Guzowski, Hoffman Estates, IL (US);
Safir Mohammed, Elk Grove Village, IL (US);
Chester L Zdanowski, Westmont, IL (US);
Edward J Stosur, Westchester, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
An in-line electron gun includes a main lens having G3 and G4 three aperture electrodes and corresponding chain link (extended aperture) electrodes. The outer apertures in each of the G3 and G4 electrodes are barrel shaped and the middle aperture is elliptical. This construction maximizes the aperture area. The spacings between the G3 and G4 electrodes and their corresponding chain link electrodes are maximized within the existing size constraints of the gun. The combined effect weakens the electric field of the main lens which reduces spherical aberration.