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US 2005/0162058 A1Published application
Deflection yoke and cathode ray tube unit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorKatsuyo Iwasaki
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorKatsuyo Iwasaki
Estimating the term…
The present invention aims to compensate for the variation in the magnetization of permanent magnets caused by the individual difference, and further to provide a deflection yoke and a CRT apparatus provided with the deflection yoke which maintain proper correction of raster distortion against temperature change of the apparatus. To accomplish these objects, in a correction unit 340 provided with the deflection yoke 30 of the CRT apparatus 1 according to the present invention, a magnetic substance 342 having an attribute in which its permeability changes with a negative temperature characteristic is attached to a permanent magnet 341 so as to cover at least one of both end faces 341a and 341b. Additionally, in the deflection yoke 30, a paired correction units 340 is symmetrically placed at the top and the bottom of the deflection yoke, opposite to each other in respect to the tube axis of the CRT 10.
A deflection yoke provided on a periphery of a cathode-ray tube, the deflection yoke applying a deflection magnetic field to an electron beam emitted towards a screen from an electron gun which is mounted in a neck of the cathode-ray tube, thereby controlling the electron beam to scan across the screen, including:
A cathode-ray tube apparatus comprising:
Dependencies are inferred from the claim text.