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. 30, 1985
Filed:
Mar. 04, 1982
Hsing-Yao Chen, Landisville, PA (US);
RCA Corporation, Princeton, NJ (US);
Abstract
An electron gun for a high resolution color display tube comprises three inline cathode assemblies, a control grid with three inline apertures, a screen grid with three inline apertures and slots at each aperture on a side facing away from the control grid, a first focusing electrode having three inline apertures facing the screen grid and three inline apertures facing away from the screen grid, and a second focusing electrode having three inline apertures facing the first focusing electrode. The diameters of the control grid apertures are in the range of 0.43 mm to 0.59 mm. The screen grid is spaced 0.13 mm to 0.26 mm from the control grid. The diameters of the screen grid apertures are in the range of 0.43 mm to 0.59 mm, and their thickness is in the range of 0.20 mm to 0.31 mm. The ratio of the depth of the slots in the screen grid to their widths is in the range of 0.13 to 0.23. The diameters of the apertures in the facing portions of both focusing electrodes are in the range of 4.06 mm to 5.44 mm, and the length of the first focusing electrode is in the range of 17.6 mm to 23.5 mm.