摘要:
A main lens is formed by a focus electrode, an intermediate electrode, and an anode electrode successively arranged in a traveling direction of an electron beam. The focus electrode and the anode electrode respectively have an electron beam passage aperture co mmon to three electron beams, having a major axis in a horizontal direction in a portion opposed to the intermediate electrode, and three electron beam passage apertures through which the three electron beams pass are formed respectively in the focus electrode and the anode electrode. Aperture dimensions in a vertical direction of the electron beam passage apertures common to the three electron beams formed respectively in the focus electrode and the anode electrode are smaller than those in the vertical direction of the electron beam passage apertures formed in portions of the intermediate electrode respectively opposed to the focus electrode and the anode electrode. This can provide a color Braun tube apparatus that has less moire while having satisfactory focus performance over the entire surface of a phosphor screen, and in which there are no increase in the cost of a driving circuit and the decrease in withstand voltage characteristics.
摘要:
A cathode ray tube is provided having an electron gun equipped with a main lens having a function of controlling a shape of an electron beam spot which is deflected to the peripheral portion of a display screen, to improve a resolution at the peripheral portion of the screen of the cathode ray tube for use in a direct view color television receiver or a color display terminal. To reduce the dynamic correction voltage of the electron gun, an electrostatic quadrupole lens with a simple structure is used, thereby reducing deterioration due to the deflection aberration of the electron beam spot at the peripheral portion of the screen.
摘要:
A color cathode ray has an electron gun which includes three cathodes for emitting three in-line electron beams and a plurality of electrodes fixed in a predetermined axially spaced relationship on insulating supports. At least one of the plurality of electrodes is cup-shaped and has a correction electrode therein, and edges of the correction electrode are formed with recesses and sloped portions. A distance L from a mouth of each of the recesses of the correction electrode to an inner wall of the at least one of the plurality of electrodes satisfies the following relationship: L′≦L≦15 &mgr;m, where L′ is a height of a burr caused in press-forming of the recesses.
摘要翻译:彩色阴极射线具有电子枪,其包括用于发射三个一字形电子束的三个阴极和在绝缘支撑件上以预定的轴向间隔关系固定的多个电极。 多个电极中的至少一个是杯形的并且其中具有校正电极,并且校正电极的边缘形成有凹陷部分和倾斜部分。 从校正电极的每个凹部的口部到多个电极中的至少一个电极的内壁的距离L满足以下关系:L'<= L <=15μm,其中L'是高度 在凹部的压制成型中引起的毛刺。
摘要:
A color cathode ray tube includes a phosphor screen, a shadow mask closely spaced from the phosphor screen and electron gun. The electron gun has a plurality of electrodes including a plurality of cathodes for emitting a plurality of in-line electron beams, a control grid having a plurality of in-line apertures centered with the cathodes, an accelerating electrode, a cup-shaped focus electrode and a cup-shaped anode fixed on insulating supports. Each of the cup-shaped focus electrode and anode has at a first end face thereof opposing the other of the cup-shaped focus electrode and anode, a single opening surrounded by a rim formed by turning in the end face thereof toward an interior thereof. Each of said cup-shaped focus electrode and anode has a correction plate electrode therein, has a step on an inner wall thereof at a position set back from the first end face thereof to provide a first portion having an inside diameter larger on an open end side thereof opposite the first end face, than that of a second portion thereof on a side of the first end face. The correction plate electrode is pressed against the step and fixed to the cup-shaped electrode, or is fixed in the second portion of the smaller inside diameter.
摘要:
An in-line electron gun includes main lens electrodes, a common aperture and, at a distance from the common aperture, three in-line apertures in a plate-shaped part. The outer apertures extend, viewed in a direction transverse to the plate-shaped part, beyond the common aperture.
摘要:
An inline electron gun and a color cathode ray tube provided with the inline electron gun for reducing the manufacturing cost for an assembly jig of the electron gun, for example, that might be generated with a change in the size of the cathode ray tube and for realizing a favorable static convergence property is provided. The inline gun includes a first flat plate electrode, a second flat plate electrode, two cylindrical electrodes at least is used. An opening geometry of outer passage holes provided in the first flat plate electrode and the second flat plate electrode is configured by combining an inner curve and an outer curve, which have different degrees. The opening geometries of the outer passage holes are symmetric with respect to a line. At least one of the outer curves and the inner curves in the outer passage holes have different degrees.
摘要:
A focusing electrode and a final accelerating electrode accommodate, respectively, a first and a second field forming electrode in positions set back from a first and a second aperture of their end faces opposed to each other. The first and the second field forming electrode have three electron beam passage apertures disposed in an in-line arrangement. When the in-line direction is an X-axis direction, a direction perpendicular to the in-line direction is a Y-axis direction and the center of a central electron beam passage aperture formed in the first field forming electrode is Xnull0 and Ynull0, the central electron beam passage aperture has a shape that passes through the intersection points of the X-axis and the Y-axis with a curve represented by the equation (X/R1)2null(Y/R2)2null1 (where R1 and R2 are constants) and that has an area smaller than the area encircled by the curve.
摘要:
An inline electron gun and a color cathode ray tube provided with the inline electron gun for reducing the manufacturing cost for an assembly jig of the electron gun, for example, that might be generated with a change in the size of the cathode ray tube and for realizing a favorable static convergence property is provided. The inline gun includes a first flat plate electrode, a second flat plate electrode, two cylindrical electrodes at least is used. An opening geometry of outer passage holes provided in the first flat plate electrode and the second flat plate electrode is configured by combining an inner curve and an outer curve, which have different degrees. The opening geometries of the outer passage holes are symmetric with respect to a line. At least one of the outer curves and the inner curves in the outer passage holes have different degrees.
摘要:
An electron gun is provided for a CRT. The electrode gun includes three cathodes for emitting electron beams, a plurality of acceleration electrodes, and a focus electrode and an anode. The focus electrode and the anode each include an opposite rim having a single electron beam pass-through hole with a vertical width V and a horizontal width H, and an electrostatic field control body positioned at a distance D from the rim, with a bridge width nulltnull, and a vertical width v and a horizontal width h of a central electron beam pass-through hole, wherein the electrostatic field control body and the focus electrode and the anode are configured to satisfy the following equation: (VnullvnullD)/29nullHnull(2nullS), where, S denotes a sum of the horizontal width h and the bridge width t of the electrostatic field control body. Spherical aberration is prevented or reduced, improving a vertical resolution of the picture.
摘要:
A color cathode ray tube having at least an electron gun, constituted by a cathode for forming a plurality of electron beams arranged in-line, and a focusing electrode and an anode constituting a main lens for focusing and accelerating the electron beams and a fluorescent screen. The focusing electrode includes at least a first division electrode and a second division electrode arranged with a gap for controlling a scanning speed of the electron beams in common. The second division electrode is opposed to the anode and has, in an opposed surface thereof, a single opening for passing the plurality of electron beams in common. A length of the first division electrode in the axial direction of the tube is longer than a length of the second division electrode in the axial direction of the tube.