Deflection yoke with improved deflection sensitivity

Details Deflection yoke with improved deflection sensitivity Deflection yoke with improved deflection sensitivity

2005-09-13

2005-09-13

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C313S441000, C313S442000, C313S430000, C313S426000, C313S427000, C313S428000, C335S209000, C335S210000, C335S211000, C335S296000

Reexamination Certificate

active

06943490

ABSTRACT:
A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field. Since the magnetic field of the second section is weakened, a beam strike neck (BSN) distance is improved, and a deflection sensitivity is improved.

REFERENCES:
patent: 6522060 (2003-02-01), Kim
patent: 6590329 (2003-07-01), Tagami
patent: 6624560 (2003-09-01), Usami
patent: 2002/0084739 (2002-07-01), Kim et al.
patent: 2000113832 (2000-04-01), None

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