Electron gun with improved beam forming region

Details Electron gun with improved beam forming region Electron gun with improved beam forming region

1981-04-29

1983-10-11

La Roche, Eugene R.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313411, 313414, H01J 2948

Patent

active

044095147

ABSTRACT:
An electron gun for use in a cathode ray tube includes beam forming electrodes and beam focusing electrodes. A gun improvement comprises the beam forming electrodes including a cathode, a control grid adjacent to the cathode and two screen grids. A first screen grid is located adjacent to the control grid. A second screen grid is located between the first screen grid and the beam focusing electrodes. Preferably, the second screen grid and the control grid are grounded.

REFERENCES:
patent: 3772554 (1973-11-01), Hughes
patent: 4234814 (1980-11-01), Chen et al.
patent: 4319163 (1982-03-01), Chen
RCA Television Service Data, File 1981 C-7, Chassis CTC 101 Series, RCA Corporation, Consumer Electronics, 1981.
"Focusing on the New Panasonic `Quintrix` Color TV Picture Tube", by David H. Carpenter, pp. 52 and 53 of Audio Video, Feb., 1974.

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