Abstract:
A shadow mask for a cathode ray tube has an effective screen portion having a plurality of beam passage holes arranged in a predetermined pattern, and an inactive portion with no beam passage holes. The length of a beam passage hole at a column adjacent to a division between the effective screen portion and the inactive portion (hereinafter “the beam passage hole length”) in the long-sided direction is set to be smaller than the length of a beam passage hole placed at the short-sided center of the column. The beam passage hole length “a” at columns which are even-numbered from the long-sided center of the effective screen portion is set to satisfy the condition of 1>a/A≧0.45, compared to the length A of the beam passage hole placed at the short-sided center of relevant columns. The beam passage hole length “b” at columns which are odd-numbered is set to satisfy the condition of 1>b/B≧0.35, compared to the length B of the beam passage hole placed at the short-sided center of relevant columns.
Abstract translation:用于阴极射线管的阴罩具有有效屏幕部分,其具有以预定图案布置的多个光束通过孔以及没有光束通过孔的无效部分。 与长边方向的有效屏幕部分和非活动部分之间的分界面(以下称为“光束通过孔长度”)相邻的列处的光束通过孔的长度被设定为小于光束的长度 通道孔位于柱的短边中心。 与有效屏幕部分的长边中心偶数编号的列的光束通过孔长度“a”设置为满足条件1> a / A> = 0.45,与光束的长度A相比 通孔位于相关柱的短边中心。 奇数列的光束通过孔长度“b”设定为满足条件1> b / B> = 0.35,与放置在相关的短边中心处的光束通过孔的长度B相比 列。
Abstract:
A shadow mask for a Cathode Ray Tube (CRT) which achieves a high brightness and white uniformity by minimizing light emission of incorrect colors, includes: an effective screen portion with a plurality of beam passage holes arranged in a predetermined pattern and a non-holed portion surrounding the effective screen portion with no beam passage holes. The beam passage holes have a large-sized hole portion on a side facing a panel of the CRT and a small-sized hole portion that is smaller than the large-sized hole portion on a side facing an electron gun are selected such. A concave portion is formed on each of the beam passage holes arranged in a direction from a center of the effective screen portion to a direction of emission, and the concave portion is varied from the center of the effective screen portion diagonally such that a serif width D satisfies D=a−bx+cx2 (wherein a, b, and c are constants, and x is a spatial distance from the center of the effective screen portion to the center of the beam passage hole) and a, b, and c are selected such that {c/(b+c)} has an absolute value between 0.0092 and 0.0099.
Abstract:
A shadow mask for a cathode ray tube has an effective screen portion having a plurality of beam passage holes arranged in a predetermined pattern, and an inactive portion with no beam passage holes. The length of a beam passage hole at a column adjacent to a division between the effective screen portion and the inactive portion in the long-sided direction is set to be smaller than the length of a beam passage hole placed at the short-sided center of the column. The length a of the beam passage hole adjacent to the division between the effective screen portion and the inactive portion at columns which are even-numbered from the long-sided center of the effective screen portion is established to satisfy the condition of 1>a/A≧0.45, compared to the length A of the beam passage hole placed at the short-sided center of relevant columns. The length b of the beam passage hole adjacent to the division between the effective screen portion and the inactive portion at columns which are odd-numbered from the long-sided center of the effective screen portion is established to satisfy the condition of 1>b/B≧0.35, compared to the length B of the beam passage hole placed at the short-sided center of relevant columns.
Abstract translation:用于阴极射线管的阴罩具有有效屏幕部分,其具有以预定图案布置的多个光束通过孔以及没有光束通过孔的无效部分。 在与有效屏幕部分和非活动部分之间在长边方向上的分隔相邻的列处的光束通过孔的长度被设定为小于放置在短边中心的光束通过孔的长度 列。 建立与有效屏幕部分的长边中心偶数列的有效屏幕部分与非活动部分之间的划分相邻的光束通过孔的长度a,以满足条件1> a / 与相关柱的短边中心处的光束通过孔的长度A相比,A> = 0.45。 建立与有效屏幕部分的长边中心奇数编号的有效屏幕部分与非活动部分之间的划分相邻的光束通过孔的长度b,以满足条件1> b / 与相关柱的短边中心处的光束通过孔的长度B相比,B> 0.35。
Abstract:
A cathode ray tube with a panel that has a thickness of the central portion of an effective area of a screen surface that is TC, a thickness of a vertical edge that is TV, a thickness of a horizontal edge portion that is TH, and a thickness of an edge in a diagonal direction that is TD. The respective values of TC, TV, TH and TD satisfy the expression (TH−TC)+(TV−TC)+(TD−TC)
Abstract:
A cathode ray tube includes a panel with inner and outer surfaces, a funnel connected to the panel, a neck connected to the rear of the funnel, and a shadow mask mounted within the panel. The inner surface of the panel satisfies the following condition: 0.2≦Px≦0.4, 0.3≦Py≦0.6 where when the inner surface of the panel is expressed by the following biquadratic: z ( x , y ) = ∑ i , j = 0 , 2 , 4 A i , j x i y j , based on the central point of the inner surface of the panel with the three-dimensional orthogonal coordinates system defined by the x, y and z axes, Px and Py are defined by the following formula: Px = A 20 A 20 + A 40 , Py = A 02 A 02 + A 04
Abstract:
A cathode ray tube includes a panel having a front screen portion on which a phosphor screen is formed and a panel flange integrally formed on an edge of the front screen portion, a funnel connected to the panel flange, a deflection yoke disposed around the funnel, a neck connected to the funnel, an electron gun disposed in the neck, a color selection apparatus for selecting electron beams emitted from the electron gun and allowing the selected electron beams to land on corresponding phosphors, and an inner shield for shielding geomagnetism, the inner shield mounted on the color selection apparatus. The color selection apparatus includes a mask having a plurality of electron beam-passing apertures, the mask being rectangular and having a longitudinal axis and a lateral axis, a frame for supporting the mask in a tensioned state, and a pair of side shield members mounted on lateral sides of the frame to shield the geomagnetism.
Abstract:
A tension mask assembly for a flat cathode ray tube includes a tension mask having a plurality of strips separated from one another by a predetermined gap, real bridges connecting adjacent strips to thus define slots through which electron beams pass, and first and second dummy bridges extending from adjacent strips toward each slot therebetween, the tension mask being installed such that its top surface faces a panel forming a screen and it is separated from the panel by a predetermined gap, a plurality of supporting members disposed at opposite sides of the tension mask to support the tension mask, and a plurality of rigid members secured to opposite ends of the supporting members to apply tension to the tension mask. A first etching boundary formed at an end of the first dummy bridge near to the center of the tension mask is lower with respect to the screen than a second etching boundary formed at an end of the second dummy bridge near to the periphery of the tension mask. The shape of a section of a slot having dummy bridges are formed such that an electron beam is prevented from passing through the slot, thereby solving the problem of visibility. Therefore, cathode ray tubes having a high definition can be manufactured.