Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1982-03-04
1985-04-30
Demeo, Palmer
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313414, 313449, H01J 2950, H01J 2956
Patent
active
045146594
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.
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A High Performance Color CRT Gun with an Asymmetrical Beam Forming Region by Chen & Hughes, ST-5105 1980 IEEE Chicago Spring Conference on Consumer Electronics, Chicago, IL.
Demeo Palmer
Irlbeck Dennis H.
RCA Corporation
Whitacre Eugene M.
Wieder K.
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