Electron gun with electrode supports

Details Electron gun with electrode supports Electron gun with electrode supports

1998-04-01

2000-02-29

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, H01J 2948, H01J 2962

Patent

active

060313269

ABSTRACT:
An electron gun includes a cathode (K), a control electrode (1), an accelerating electrode (2), a first anode (3), a focus electrode (4), and a second anode (5), which electrodes are arranged in a tube axial direction at predetermined intervals; and electrode supports (11, 21, 31, 41, 51) provided to a side wall of each electrode and embedded in and secured to insulating supports (6); wherein the focus electrode (4) is cylindrical an has three different diameters respectively provided at a cathode side portion, an intermediate portion and a panel side portion, the panel side portion of the focus electrode (4) is inserted into the second anode (5) to constitute a main lens section, the inner diameter of the intermediate portion of the focus electrode (4) is smaller than the inner diameter of the panel side portion and larger than the inner diameter of the cathode side portion and the electrode support (41) is provided at the intermediate portion of the focus electrode (4). The electron gun including an electrode support (41) provided at the intermediate portion of the focus electrode (4) reduces deformation of the focus electrode (4).

REFERENCES:
patent: 4904898 (1990-02-01), Penird et al.
patent: 5113112 (1992-05-01), Shimona et al.
patent: 5162695 (1992-11-01), Shimona et al.
patent: 5466983 (1995-11-01), Shirai et al.
patent: 5894190 (1999-04-01), Hirota et al.

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