Title:
COLOR VIDEO TUBE
Document Type and Number:
Japanese Patent JPS56136434
Kind Code:
A
Abstract:
The present invention relates to an improvement in a color picture tube having an inline electron gun for generating and directing a plurality of electron beams, along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The improvement comprises a change in the gun electrodes that form the main focus lens. The main focus lens is formed by two spaced electrodes. Each electrode includes a member having a plurality of apertures therein equal to the number of electron beams and a lens plate spaced from the member which is electrically connected to the member. The lens plates of the two electrodes are adjacent and spaced from each other and are located between the members of the electrodes having a plurality of apertures therein. Each lens plate includes a signal large hole therein formed by a plurality of overlapping apertures equal to the number of electron beams.
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Inventors:
RICHIYAADO HENRII HIYUUZU
Application Number:
JP2931481A
Publication Date:
October 24, 1981
Filing Date:
February 27, 1981
Export Citation:
Assignee:
RCA CORP
International Classes:
H01J29/50; (IPC1-7): H01J3/02; H01J29/50