Electron beam profile and energy shaping lens

Details Electron beam profile and energy shaping lens Electron beam profile and energy shaping lens

1997-05-09

1999-11-02

Westin, Edward P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 15, 315 16, 31536815, 348781, 348805, 345 9, H01J 2956, G09G 500, H04N 916

Patent

active

059777273

ABSTRACT:
An apparatus and method to dynamically shape the projected energy profile of an electron beam and the energy distribution of an electron beam of a cathode ray tube to provide a single cathode ray tube the ability to display multiple image formats of varying resolutions, brightnesses and aspect ratios. In one embodiment, the invention contemplates the introduction of a shaping lens along the path of the electron beam comprising at least three electrodes. Voltages are selectively applied to the electrodes to dynamically and selectively vary the projected energy profile of an electron beam in a plane perpendicular to the longitudinal axis of the cathode ray tube.

REFERENCES:
patent: 3885095 (1975-05-01), Wolfson et al.
patent: 4786845 (1988-11-01), Kato et al.
patent: 4899091 (1990-02-01), Odenthal
patent: 4967120 (1990-10-01), Katsuma et al.
patent: 5034653 (1991-07-01), Cho et al.
patent: 5663609 (1997-09-01), Kamohara et al.
patent: 5689158 (1997-11-01), Chen

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