Color CRT device with deflection yoke

Details Color CRT device with deflection yoke Color CRT device with deflection yoke

1997-02-12

1998-09-01

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

H01J 2970

Patent

active

058014802

ABSTRACT:
A color CRT device having a cathode ray tube and a deflection coil. The cathode ray tube includes a panel provided with a phosphor surface which has a diagonal diameter of 45 cm or more and has an aspect ratio greater than 4/3 and an electron gun having a high-voltage electrode and a focusing electrode which is disposed in proximity to the high-voltage electrode across a gap. The deflection yoke includes a core which cross-section perpendicular to a tube axis of the cathode ray tube is approximately annular; a saddle type first deflection coil for deflecting in a horizontal direction an electron beam, and a toroidal type second deflection coil for deflecting in a vertical direction the electron beam. The color CRT device satisfies a following relational expression: ##EQU1## where L mm denotes a distance between a central position of the gap and an end surface of the core on a side of the stem,

REFERENCES:
patent: 5204585 (1993-04-01), Chen
patent: 5412277 (1995-05-01), Chen

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