摘要:
A deflection yoke (15) for a cathode ray tube, with reduced weight and volume plus a low cost of manufacture is obtained by making a ferrite core (24; 31, 32; 52, 53; 61; 71, 72) housed in the deflection yoke (15) very light and thin, based on an optimized design obtained through a number of experimental trials.
摘要:
A deflection yoke in which variation in the magnetizing amount due to individual difference of permanent magnets is corrected and correction of appropriate raster distortion can be sustained even for the temperature variation of an apparatus, and a cathode ray tube unit comprising it. The correction unit (340) in the deflection yoke (30) of a CRT unit (1) is fixed, onto at least one of the opposite end faces (341a, 341b) of a permanent magnet (341), with a magnetic body (342) having such characteristics that the permeability varies with negative temperature characteristics so as to cover it. The deflection yoke (30) is provided with a pair of vertical correction units (340) symmetrically to the tube axis of a CRT (10).
摘要:
A yoke portion (Y) fitted with a deflection yoke (20) has a cross section vertical to the tube axis (Z) of which the shape is generally rectangular and non-circular. A core portion (24) of the deflection yoke (20) has a cross section vertical to the tube axis (Z) of which the shape satisfies: (M+N)/(2*(M +N ) )
摘要:
Deflection coils (32, 34) for deflecting an electron beam emitted from an electron gun (24) are provided outside a cathode-ray tube (12) in which the electron gun (24) is housed, and a phosphor screen (28) is formed. The cathode-ray tube (12) further includes a velocity modulation coil (18) for modulating a horizontal scanning velocity of an electron beam, a first magnetic substance (50) surrounding an outer circumference of the cathode-ray tube (12) from outside the velocity modulation coil (18), and a second magnetic substance (60) surrounding the outer circumference of the cathode-ray tube (12) between the deflection coil (32) and the first magnetic substance (50). Because of this, the sensitivity of velocity modulation can be enhanced effectively with a simple configuration while deflection distortion is prevented.
摘要:
A picture display device comprising a cathode ray tube (1) with an elongated display screen (8) and a deflection system (9) is described. The deflection power is reduced by two means. The deflection system (9) is arranged to scan the lines in the direction of the short axis (22) of the display screen (8), and the cone portion (3) of the cathode ray tube (1) has an elongated cross-section (54) whose aspect ratio is larger than or equal to the aspect ratio of the display screen (8), thereby enabling the deflection system (9), and in particular the line deflection subsystem (12), to be positioned closer to the electron beam envelope (51), which reduces magnetic losses.
摘要:
A cathode ray tube including a deflection yoke which can remarkably decrease a magnetic leakage field. In the deflection yoke, a diameter of an end of a ferrite core (57) to a screen side is 50% to 85% of a diameter of an end of a horizontal deflection coil (51) to the screen side, and an interval between the end of the horizontal deflection coil to the screen side and the end of the ferrite core to the screen side is 27% to 50% of a length of the horizontal deflection coil in a tube axis direction. The cathode ray tube can overcome problems of general cancellation coils, and reduce the magnetic leakage field even at a high deflection angle.
摘要:
The invention relates to a color display device comprising an electron gun (5) for generating three electron beams (6,7,8), and convergence means (14) for dynamically influencing the convergence of the electron beams. The convergence means (14) comprise coils (22) for generating a magnetic field. The coils (22) are provided with an electrically conducting layer.
摘要:
The invention relates to a deflection ring of sintered MgZn-ferrite material. In accordance with the invention, this deflection ring is characterized in that the majority of the grains of the sintered material have a monodomain structure. By virtue thereof, a relatively small heat dissipation occurs in the ring when it is used in a cathode ray tube. The average grain size of the sintered MgZn-ferrite material is preferably 2.8 micrometers or less. MgZn-ferrite materials whose composition corresponds to the formulaMg1-zZnzFe2-yO4, wherein 0.1