Electron gun structures for use in in-line type color picture tubes
AssigneeHitachi, Ltd.
InventorsMasahiro Miyazaki, Hisao Nakamura
Life of this patent
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Abstract
The electron gun structure comprises a cup shaped control electrode having a top provided with three aligned openings, and one ends of supporting members are secured to the outer wall of the control electrode near a lower opening. Each supporting member extends toward the top from the secured end and includes a portion separated from the outer wall. The other ends of the supporting members are embedded into insulating parts to position the control electrode with respect to other electrodes.
Claims6
An electron gun structure for use in an in-line type color picture tube comprising a center gun, and a pair of side guns disposed on both sides of sid center gun;
- each of said guns including a cathode electrode, a control electrode, and other electrodes;
- said control electrodes of said guns being formed in a common control electrode taking the form of a cup with a top having openings transmitting electron beams;
- said common control electrode being supported by supporting members;
- one end of each supporting member being secured to a side wall of said common control electrode at a point near lower opening of said common control electrode;
- each supporting member including a portion extending from said portion toward said top with a gap between said portion and the side wall of said control electrode, and a leg secured to an insulating bar so that said control electrode is supported by said insulating bar at a predetermined positional relation with respect to other electrode of each gun;
- each of said cathode electrodes supported by an insulating member so as to face said top openings of said common control electrode with a predetermined spacing.
Dependencies are inferred from the claim text.