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AssigneeMatsushita Toshiba Picture Display Co., Ltd.
InventorsHiroji Morimoto, Koji Nishiyama, Katsuyo Iwasaki, Akira Satou, Kenichiro Taniwa
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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.
A cathode-ray tube apparatus, comprising a cathode-ray tube in which an electron gun is housed and a phosphor screen is formed, and a deflection coil for deflecting an electron beam emitted from the electron gun, provided outside the cathode-ray tube,
Dependencies are inferred from the claim text.