Color cathode-ray tube apparatus
AssigneeKabushiki Kaisha Toshiba
InventorYutaka Fukuda
Life of this patent
Estimating the term…
Abstract
A color cathode-ray tube apparatus has a compensation mechanism for generating a magnetic field that compensates a change in a horizontal-deflection magnetic field due to a change in the temperature of horizontal-deflection coils. The compensation mechanism is formed of auxiliary coils to which a current is supplied in synchronism with horizontal deflection of electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils.
Claims11
A color cathode-ray tube apparatus having a pair of horizontal-deflection coils for generating a horizontal-deflection magnetic field that horizontally deflects a plurality of electron beams emitted from an electron gun assembly, comprising:
- compensation means for generating a magnetic field that compensates a change in the horizontal-deflection magnetic field due to a change in a temperature of the horizontal-deflection coils, the compensation means having auxiliary coils to which a current is supplied in synchronism with horizontal deflection of the electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils.
A color cathode-ray tube apparatus having an electron gun assembly for emitting a plurality of electron beams, and a deflection yoke having horizontal-deflection coils and vertical-deflection coils for horizontally and vertically deflects the plurality of electron beams emitted from the electron gun assembly, comprising:
- compensation means for generating a magnetic field that compensates a change in the horizontal-deflection magnetic field due to a change in a temperature of the horizontal-deflection coils, the compensation means having auxiliary coils to which a current is supplied in synchronism with horizontal deflection of the electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils, the control element being an inductance element that includes a coil, and a magnetic core made of a magnetic material that shows a larger change in magnetic permeability than a magnetic material of a core section of the deflection yoke when the temperature changes.
A color cathode-ray tube apparatus having a pair of horizontal-deflection coils for generating a horizontal-deflection magnetic field that horizontally deflects a plurality of electron beams emitted form a electron gun assembly comprising:
- compensation means, connected in series to a pair of horizontal-deflection coils, for generating a magnetic field that compensates a change in the horizontal-deflection magnetic field due to a change in a temperature of the horizontal-deflection coils, the compensation means having auxiliary coils to which a current is supplied in synchronism with horizontal deflection of the electron beams, and a control element for controlling the current supplied to the auxiliary coils in accordance with a change in the temperature of the horizontal-deflection coils, and the compensation means generating a magnetic field for compensating the horizontal-deflection magnetic field generated by the horizontal-deflection coil which weakens as temperature increases.
Dependencies are inferred from the claim text.