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公开(公告)号：US4304586A
公开(公告)日：1981-12-08
申请号：US51559
申请日：1979-06-25
CPC分类号： H01J29/861 , C03B23/076 , H01J9/244
摘要： A method of manufacturing a cathode-ray tube is provided by drawing a glass tube section softened by heating onto a mandrel whose transverse dimensions increase near one end of the tube section in the direction of the end at least twice in a generally stepwise manner, so that in the direction of the end, upon drawing, at least a first and a second wall portion of the inner wall of the tube section become located in planes substantially perpendicular to the tube axis. The first wall portion may serve as an engaging surface for an electrode and the second wall portion may serve as an engaging surface for the window. A third drawn wall portion may serve as a reference face of the tube in a device.
摘要翻译： 制造阴极射线管的方法是通过将通过加热软化的玻璃管部分通过一般逐步的方式将端部的方向上的横截面尺寸增加到管部分的一端附近至少两次而在软管上软化，因此 在端部的方向上，在拉伸时，管部分的内壁的至少第一和第二壁部分位于基本上垂直于管轴线的平面中。 第一壁部分可以用作电极的接合表面，并且第二壁部分可以用作窗口的接合表面。 第三拉伸壁部分可以用作装置中管的参考面。
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2.发明授权Cathode ray tube with transversely supported electrode and conductive wall coating 失效阴极射线管，横向支撑电极和导电壁涂层
公开(公告)号：US4276494A
公开(公告)日：1981-06-30
申请号：US056480
申请日：1979-07-11
CPC分类号： H01J29/02 , H01J29/861 , H01J29/88
摘要： In a cathode-ray tube, in particular a camera tube, the inner wall of the glass envelope is coated with an electrically conductive material interrupted in the proximity of electrodes extending transversely to the wall coating and supported by transversely extending supporting surfaces. At the area of each of the interruptions the envelope has a stepwise decrease of the inside diameter in two steps. In the direction of decreasing diameter the first of these steps constitutes the supporting surface for the transverse electrode and the interruption in the wall coating is provided on a wall portion of the second of these steps. The interruptions provided in this manner do not exert any disturbing influence on the electron beam in the tube.
摘要翻译： 在阴极射线管中，特别是相机管中，玻璃外壳的内壁涂覆有导电材料，该导电材料在横向于壁涂层延伸的电极附近中断，并由横向延伸的支撑表面支撑。 在每个中断的区域，信封在两个步骤中逐步减小内径。 在直径减小的方向上，这些步骤中的第一个构成了用于横向电极的支撑表面，并且在这些步骤中的第二个步骤的壁部分上设置了壁涂层的中断。 以这种方式提供的中断不会对管中的电子束施加任何干扰。
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公开(公告)号：US4659964A
公开(公告)日：1987-04-21
申请号：US677940
申请日：1984-12-04
CPC分类号： H01J29/50 , H01J29/46 , H01J2229/507
摘要： A display tube comprising in an evacuated envelope (1) an electron gun system (6) for generating and focusing by means of a focusing lens at least two electron beams (28 to 35) on a display screen (5), which electron beams are deflected by deflection means and describe a frame on the display screen. The electron gun system (6) comprises at least two electron sources (20 to 26), the electrons in each electron beam being accelerated immediately after leaving the electron source by means of an electric field having a field strength exceeding 600 V/mm. The central axes (36) of the electron beam extend substantially parallel to each other, and all beams are converged by the focusing lens in the immediate proximity of the focus of the focusing lens, after which each separate beam is focused on the display screen by the focusing lens to form a spot. The astigmatism and the coma of the focusing lens, especially for objects not situated on the tube axis, decreases rapidly with decreasing object potential with the beam aperture angle being kept the same. The electrons leave the source at a low potential and are then accelerated in a strong electric field exceeding 600 V/mm nearly immediately after leaving the electron source, thereby effecting production of a very narrow electron beam which remains narrow up to the display screen. The effect of the field curvature of the focusing lens is also considerably reduced by the narrow beams. If all electron beams through the focusing lens converge in the immediate proximity of the focus of the focusing lens, a minimum of aberrations as a result of the deflection is obtained. The electron sources are preferably P-N cathodes or diode type electron guns.
摘要翻译： 一种显示管，包括在真空外壳（1）中的电子枪系统（6），用于通过聚焦透镜在显示屏（5）上产生和聚焦至少两个电子束（28至35），所述电子束是 通过偏转装置偏转并描绘显示屏上的框架。 电子枪系统（6）包括至少两个电子源（20至26），每个电子束中的电子通过场强超过600V / mm的电场离开电子源后立即加速。 电子束的中心轴线（36）基本上彼此平行地延伸，并且所有的光束在聚焦透镜的焦点附近被聚焦透镜会聚，之后每个单独的光束通过 聚焦镜头形成一个点。 聚焦透镜的散光和彗差，特别是对于不在管轴上的物体，随着光束孔径角保持不变，目标电位随着物体电位的减小而迅速减小。 电子离开源极处于低电位，然后在离开电子源之后几乎立刻以超过600V / mm的强电场加速，由此产生非常窄的电子束，其保持窄到显示屏。 聚焦透镜的场曲率的影响也被窄光束大大降低。 如果通过聚焦透镜的所有电子束聚焦在聚焦透镜的焦点附近，则获得作为偏转结果的最小像差。 电子源优选为P-N阴极或二极管型电子枪。
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公开(公告)号：US4268777A
公开(公告)日：1981-05-19
申请号：US70552
申请日：1979-08-29
CPC分类号： H01J29/624
摘要： A cathode-ray tube having an electron gun to generate an electron beam and a focusing lens to focus the electron beam on a target. The anode of the electron gun forms part of the focusing lens and has a very small aperture to limit the electron beam. In order to prevent positive ions formed in the tube from poisoning the cathode the potential of the anode is at most 75 volts relative to the cathode potential and the distance from the center of the focusing lens to the aperture in the anode is at least equal to 1.5 times the largest dimension of the anode taken in a cross-section at right angles to the axis.
摘要翻译： 具有产生电子束的电子枪的阴极射线管和将电子束聚焦在靶上的聚焦透镜。 电子枪的阳极形成聚焦透镜的一部分，并且具有非常小的孔径以限制电子束。 为了防止在管中形成的正离子使阴极中毒，阳极的电位相对于阴极电位至多为75伏，并且从聚焦透镜的中心到阳极中的孔的距离至少等于 在与轴成直角的横截面中摄取的阳极的最大尺寸的1.5倍。
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