Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Reexamination Certificate
2006-10-24
2006-10-24
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
C315S391000, C315S364000, C313S440000, C313S413000
Reexamination Certificate
active
07126292
ABSTRACT:
A deflection coil for deflecting an electron beam emitted from an electron gun is provided outside a cathode-ray tube in which the electron gun is housed, and a phosphor screen is formed. The cathode-ray tube further includes a velocity modulation coil for modulating a horizontal scanning velocity of an electron beam, a first magnetic substance surrounding an outer circumference of the cathode-ray tube from outside the velocity modulation coil, and a second magnetic substance surrounding the outer circumference of the cathode-ray tube between the deflection coil and the first magnetic substance. Because of this, the sensitivity of velocity modulation can be enhanced effectively with a simple configuration while deflection distortion is prevented.
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Iwasaki Katsuyo
Morimoto Hiroji
Nishiyama Koji
Satou Akira
Taniwa Kenichiro
Hamre Schumann Mueller & Larson P.C.
Matsushita Toshiba Picture Display Co., Ltd.
Vo Tuyet Thi
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