摘要:
A cathode ray tube device includes: a cathode ray tube with an envelope including a panel having a phosphor screen on its inner face and a funnel having a neck portion including an electron gun; and a deflection unit disposed around an outer face of the funnel. An inductance-adjusting element is provided therein for reducing an inductance at a frequency in an audio frequency band of at least one of a plurality of coils included in the deflection unit, and thereby noise is reduced that is generated by the at least one of the plurality of coils whose inductance is thus reduced.
摘要:
In a cathode ray tube (10), an electron beam is directed towards a faceplate (20) having an electrode (22) biased at screen potential and is magnetically scanned across the faceplate (20) to impinge upon phosphors (23) thereon to produce light depicting an image. A six-pole coil (15) is disposed proximate the deflection yoke (16) and/or on the tube neck (14) to modify the focus of the red, green and blue electron beams to control focus. An electrode (46) between the tube neck (14) and the faceplate (20) is biased at or above screen potential to deflect electrons over a greater total angle than is obtained from the magnetic deflection.
摘要:
Disclosed is a deflection yoke mounted around a glass bulb of a CRT so as to cover a predetermined area of the glass bulb. The predetermined area is where an outer shape of the glass bulb smoothly goes from circular to substantially rectangular along a tube axis of the CRT. The deflection yoke includes a horizontal deflection coil disposed in a shape to fit with the outer shape of the glass bulb, and a funnel-shaped ferrite core disposed to surround the horizontal deflection coil. The inner shape of the ferrite core is circular throughout a length of the ferrite core.
摘要:
A cathode ray tube (1) having an improved deflection unit (11) is described. The deflection unit (11) comprises line and/or frame coils that comprise a composition of wires having a conductive coating and wires having a non-conductive coating. Such deflection units have a good anti-ringing performance, while the good adhesion characteristics of non-conducting coated wires are maintained.
摘要:
In a deflection yoke to be attached on a neck portion of a cathode ray tube for use, showing over 90° and equal or less than 115° in deflection angle thereof and having the neck being equal or greater than φ 18 mm and equal or less than φ 26 mm in diameter thereof, thickness of a magnetic core is thinned in vertical direction with respect to in horizontal direction, and sizes of horizontal and vertical deflection coils and the magnetic core are selected to be equal or greater than 80 mm and equal or less than 100 mm, equal or greater than 50 mm and equal or less than 70 mm, and equal or greater than 30 mm and equal or less than 50 mm, respectively, and further the magnetic core is positioned near to the neck portion side of the cathode ray tube with respect to those horizontal and vertical deflection coils. With use of the deflection yoke having such structure as mentioned in the above, not only small-sizing and weight-lighting and low energy consumption can be obtained, but also it is possible to suppress generation of geometric distortion and misconvergence, while maintaining good deflection sensitivity characteristics, as well as to reduce useless magnetic field emission below the standardized value thereof.
摘要:
A funnel of an envelope of a cathode ray tube has a cone portion (40) and a deflection yoke (37) is mounted on the cone portion. The deflection yoke includes a hollow magnetic core (44), and horizontal deflection coils (43H) and vertical deflection coils (43V) which are provided on an inner surface side of the core. Each of lateral cross-sections of an outer surface of the cone portion and an inner surface of the core, perpendicular to a center axis of the funnel, has a substantially rectangular shape, and a gap between the lateral cross-sections of the outer surface of the cone portion and the inner surface of the core includes a non-uniform portion.
摘要:
A cathode ray tube apparatus comprising : a deflection yoke comprising a horizontal deflection coil (14) that forms the pin cushion distortion as a whole; a vertical deflection coil (15) that forms the barrel distortion as a whole: a resin frame (16) provided around the periphery of the horizontal deflection coil (14), which insulates and fastens the horizontal deflection coil (14) and the vertical deflection coil (15); and a ferrite core (20) provided around the periphery of the vertical deflection coil (15) to strengthen the magnetic flux and the length of part of cone portion of the horizontal deflection coil (14) at the side of the screen whose winding angle is not less than 0 degree nor more than 30 degree with respect to the reference line (13) is 25mm or longer as measured from the reference line (13). This cathode ray tube apparatus can correct the pin cushion distortion of raster in the upper-and-lower side of the picture for flattened and increased deflection angle cathode ray tubes with the deflection yoke itself.