公开(公告)号：EP0244039A2

公开(公告)日：1987-11-04

申请号：EP87200798.4

申请日：1987-04-28

申请人： PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

发明人： Smith, James

IPC分类号： H01J29/06 ,  H01J29/89 ,  H01J31/12

CPC分类号： H01J31/124 ,  H01J29/06

摘要： A cathode ray display tube has a magnetic shield comprising a mesh (60) of high permeability magnetic material such as mumetal covering the outer surface of its transparent faceplate (14) through which a display from a screen (16) is visible and which together with a magnetic shielding box (70) surrounding the remainder of the tube's envelope (10) inhibits extraneous magnetic fields entering the envelope and affecting the electron beam undesirably. The shielding arrangement is particularly useful with a flat tube having a relatively large area faceplate and using a low-energy scanning electron beam (32). The mesh (60) may be supported by one or more transparent members (66), and may be treated to enhance contrast of the display and also to act as a electromagnetic radiation shield.

摘要翻译： 阴极射线显示管具有磁屏蔽，其包括高透磁性磁性材料的网状物（60），例如覆盖其透明面板（14）的外表面的木质构件，通过该屏蔽（14）可以看到来自屏幕（16）的显示器， 围绕管的外壳（10）的其余部分的磁屏蔽箱（70）抑制进入外壳的外来磁场并且不希望地影响电子束。 屏蔽装置对于具有相对较大面积的面板并使用低能扫描电子束（32）的扁平管特别有用。 网状物（60）可以由一个或多个透明构件（66）支撑，并且可以被处理以增强显示器的对比度并且还用作电磁辐射屏蔽。

公开(公告)号：EP0242921A2

公开(公告)日：1987-10-28

申请号：EP87200719.0

申请日：1987-04-16

申请人： PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

发明人： Emberson, David L.

IPC分类号： H01J29/06 ,  H01J29/46

CPC分类号： H01J31/124 ,  H01J29/06

摘要： In a flat cathode ray display tube in which an electron beam (30) is directed firstly in a rear region (24) parallel to a faceplate (14) carrying a phosphor screen (16) and then reversed to travel in the opposite direction in a front region (22) before being deflected towards, and raster scanning over, the screen, a magnetic shield (60) is provided in the rear region to shield the beam from magnetic fields entering through the faceplate over a certain of its path length in that region to reduce raster shift effects caused by such fields. This is especially useful where the electron beam in the front and rear regions is a low-energy beam, rendering it particularly susceptible to influence by magnetic fields, this beam being supplied to an electron multiplier (44) overlying the screen.

摘要翻译： 在平面阴极射线显示管中，其中电子束（30）首先指向与携带荧光屏（16）的面板（14）平行的后部区域（24）中，然后反向在相反方向上行进 前面区域（22），并且在屏幕上光栅扫描之后，在后部区域中设置磁屏蔽（60），以在所述后部区域中屏蔽来自通过面板的磁场在一定路径长度上的磁场， 区域，以减少由这些字段引起的光栅移位效应。 这在前面和后面区域中的电子束是低能量光束时特别有用，使其特别容易受到磁场的影响，该光束被提供给覆盖在屏幕上的电子倍增器（44）。

公开(公告)号：EP0217473A2

公开(公告)日：1987-04-08

申请号：EP86201680.5

申请日：1986-09-30

申请人： North American Philips Corporation

发明人： Brown, Richard Irwin

IPC分类号： H01J29/06

CPC分类号： H01J29/06

摘要： Internal magnetic shield for color television picture tube has a pair of slot-shaped openings, facing each other above and below the Z axis, and an oblong-shaped aperture surrounding the Z axis, having a length-to-width ratio of about 1.7 to 2.1.

摘要翻译： 用于彩色电视显像管的内部磁屏蔽具有一对在Z轴上方和下方彼此相对的槽形开口，以及围绕Z轴的长圆形孔，其长宽比为约1.7至 2.1。

公开(公告)号：EP0196827A2

公开(公告)日：1986-10-08

申请号：EP86302029.3

申请日：1986-03-19

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Takenaka, Shigeo Patent Div. Toshiba Corp. ,  Koike, Norio Patent Div. Toshiba Corp. ,  Itou, Takeo Patent Div. Toshiba Corp. ,  Matsuda, Hidemi Patent Div. Toshiba Corp.

IPC分类号： H01J29/06 ,  H01J29/07

CPC分类号： H01J29/07 ,  H01J29/06 ,  H01J2229/0783

摘要： In a colour cathode ray tube provided with in-tube metallic members of which the main constituent is iron, such as the shadow mask assembly or inner shield, at least part of the surface of these mretallic members is formed with a blackened region. The vicinity of the surface of this blackened region contains Al, Re and Si, the Si content being selected in the range 1.5 wt% to 30 wt%, preferably 4 wt% to 15 wt%.

摘要翻译： 在阴极射线管中设置有主要成分为铁的管状金属构件，例如荫罩组件或内罩，这些金属构件的至少一部分表面形成有黑化区域。 该黑色区域的表面附近包含Al，Re和Si，Si含量选自1.5重量％至30重量％，优选4重量％至15重量％。

公开(公告)号：EP0090643A2

公开(公告)日：1983-10-05

申请号：EP83301761.9

申请日：1983-03-29

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Shimoma, Taketoshi c/o Patent Division ,  Fukuda, Kumio c/o Patent Division ,  Kobayashi, Kenichi c/o Patent Division

IPC分类号： H01J29/06

CPC分类号： H01J29/06

摘要： A colour cathode ray tube has an inner magnetic shield for controlling the magnetic field distribution internal of the tube. The inner shield is formed to have a pair of long side walls and a pair of short side walls provided along an inner wall of a funnel-shaped portion of the tube. Each long side wall has formed therein at least one elongated opening in each of the two regions divided by a centre of the long side wall. The openings may take the form of a triangular-shaped opening or they may be narrow generally rectangular slots.

摘要翻译： 彩色阴极射线管具有用于控制管内部的磁场分布的内磁屏蔽。 内护罩形成为具有一对长侧壁和沿管的漏斗状部分的内壁设置的一对短侧壁。 每个长侧壁在其中形成有由长侧壁的中心分开的两个区域中的每一个中的至少一个细长开口。 开口可以是三角形开口的形式，或者它们可以是窄的大致矩形的槽。