DE2257540A1 - MULTI-BEAM CATHODE TUBE - Google Patents

Description

23. KOV. 1972 patent attorneys

Dipl. Ing. C. Wallach ± l \ 031

Dipl. Ing. G. Koch
Dr. T. Haibach

δ Mikchenl 2 2 575 AO

Kaufingerstr. 8. Tel. 240278

Adrian W. Standaart,

Winston-Salem, North Carolina, USA

Multi-beam cathode ray tube

The invention relates generally to cathode ray tubes and, more particularly, to a cathode ray tube construction, in which a single electron gun with a single cathode, with a control grid, a first anode, a focusing anode and an accelerating anode generates multiple electron beams. The number of rays will be each deflected along elongated phosphor screen strips with a narrow width that span a single screen area transversely, to create images such as multicolored or character representations on the screen of a cathode ray tube, or the cathode ray tube may have a number of individual phosphor screen areas on the screen and a number of electron beams corresponding to the number of individual screens can be generated, with each beam individually controllable to produce different images on different screens.

Previously it was used in the manufacture of cathode ray tubes for

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a multicolored image reproduction, such as with color television tubes !! and multi-colored computer readout display tubes common «one Number of electron gun to provide the was equal to the number of electron beams required for reproduction. Every electron gun closes its own cathode and filament unit, its own control grid, a first anode, a focusing anode and an accelerating anode to control the electron beam formed by the electrons emitted by the associated cathode will. The electron beam from each gun is controlled separately, in the case of a color television receiver by the control signal for the particular color to which this beam is assigned and the three electron beams In the case of a color television tube, they are directed through a shadow mask onto the points that form the phosphor color pattern Form on the screen of the cathode ray tube. Such a color cathode ray tube with several electron guns, several rays and a shadow mask, has many Naohteile.

The need to provide three separate electron beam generating system stars in such a tube contributed considerably 'to the manufacturing costs of color cathode ray tubes, and Electron emission limits have heretofore made it difficult to obtain desired brightness and other required display properties to achieve, taking into account the complexity of the construction of the electron guns and their components resulted in many difficult manufacturing problems. The need for a shadow mask increases both costs and costs Complexity of such a cathode ray tube construction. Attempts have been made to produce color images or multicolored ones Generate representations without the use of a shadow mask, for example by using a first one Phosphoreohioht to produce a first color on the inside

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22575A0

Surface of the fluorescent screen of a cathode ray tube and cover it this.first layer of phosphor with a second and then with a third layer of phosphor or luminescent materials Generation of the other two primary color lines He. experiences with this type of cathode ray tube has been shown to have poor brightness uniformity characteristics, because, for example, when the electron gun closest phosphor or lume layer is to be excited to generate ^ their correct color, the

/ on the outside of the cathode ray tube screen low is due to the loss of light when the light is from the rearmost luminescent layer through the two front layers

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passes through, 'the luminescence' is significantly limited by the reduced anode voltage, which is required to limit the excitation to the desired phosphor layer. Such a cathode ray tube requires complicated switching of high voltages in order to select the voltage to be excited and to achieve an excitation level that compensates for the loss of brightness in the light emitted by the two rear layers. "

It is also common types of color cathode ray tubes using luminance dot patterns on the Luminous screen and shadow masks for the selective excitation of the phosphor or luminescent mass points to generate the correct one Color pattern largely limits the achievable resolution and the achievement of high resolution images on a extremely small space can be generated and subsequently enlarged can, as they are, for example, with many information dar-. position cathode ray tubes are desirable is prevented.

The invention is based on the object of a novel cathode ray tube construction to create the color images

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several generated by a novel electron beam detector Rays and a new arrangement of luminous masses on the Can produce light screen of the cathode ray tube. The novel Electron beam system for the cathode ray tubes is intended a number of separately controllable electron beams to excite an arrangement of phosphor or luminous material the phosphor screen in such a way as to produce multicolored images suitable for color-distance displays or multicolored information displays with an area of application are suitable.

This object is achieved by the invention specified in claim 1.

Further advantageous refinements and developments of the invention emerge from the subclaims.

Due to the inventive design of the multi-beam cathode ray tube using a novel electron beam generation system it is possible to deliver multiple electron beams from a single cathode using one construction of the electron gun results in the manufacture and assembling the components of the electron gun facilitates and a significant improvement in cathode electron emission and a reduction in scattered emission enables.

A number of advantages result from the fact that it is possible to have a number of individual visual representations To create luminous screens or individual luminous screen areas, which are arranged close to one another to allow monitoring or viewing by a single observer. For example, cathode ray tube displays can be used by telemetry or measuring devices in which the representations on different

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which screens or screen areas have different colors, e.g. green for one screen, yellow for the other screen and red for

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a third screen *; when presenting certain information be appropriate due to the color of the phosphor des, special screens and thus the color of the generated image. It is also possible to provide several screens, such as two to six screens, on a single cathode ray tube, the image on each screen can be provided by a different television station or surveillance television karaera enable the viewer to monitor two or more television images at the same time. The number of screens and electron beams also has advantages in oscilloscopic waveform displays on, knows up to six separate ones can be viewed simultaneously without time division or electrical switching.

Furthermore, a novel multi-beam cathode ray tube is advantageously used created with multiple screens that have a single glass envelope and a single electron gun which can generate a number of separate electron beams which are individually controlled and in their number a number of luminescent screens to produce several ones Pictures match. For example, two or three beams can be provided in a single horizontal row, around images on two or three horizontally spaced lampshade areas on the screen surface of the cathode ray tube and to provide two or three separate images. As another example, two can be vertically spaced Arranged rows of three separate electron beams are used, all from a single electron gun and which are used to place images on two vertically spaced rows of activate and generate three fluorescent screen areas, whereby six different light screens in one

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Glass bulb of a cathode ray tube result. In a further embodiment, the mixing of one of the electron beams in a single horizontal row with several (three) electron beams on a vertical axis is possible for the production of color television pictures on one or more three-colored Leuohteohinnen, which consist of horizontally distributed strips with a width of approximately O _f 25 to 0.45 mm (0.010 to 0 _a OL8 inches) from f Arber forming Leuohtmassen exist which have a magenta, cyan, and green luminous efficiency or fluorescence.

The construction of the electron gun according to the invention for cathode ray tubes enables the creation of one or more vertically spaced rows of one or more electron beams, each separated are controllable, horizontal and vertical electrostatic baffles can be provided on a single Electron gun frame construction with a first anode and grid plates and a single cathode assembly can be supported.

The invention is described below with reference to in the drawing illustrated embodiments explained in more detail.

In the drawing show: Fig. 1 is a vertical section of an embodiment of a

Multi-beam multi-color cathode ray tube with a single electron gun;

FIG. 2 is a fragmentary horizontal section, on an enlarged scale, of the electron gun of FIG Cathode ray tube taken along line 2-2 of Figure 1;

3 is a vertical longitudinal section on an enlarged scale

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the electron gun; - Fig. 4 is a plan view of the cathode;

Fig. 5 is a cross section through the cathode along the Line 5-5 of Figure 4; ^ -:

Figure 6 is a cross-section of the control grid and first anode taken along line 6-6 of Figure 3;

7 is an exploded perspective view of the Electron gun * with parts broken are shown;

Fig. 8 is a vertical section along the line 8-8 according to Fig. 3;

9 shows a schematic representation of the embodiments

of the cathode ray tube, with typical voltages for the elements of this cathode ray tube are indicated;

Figure 10 is a fragmentary rear view of part of the tri-color Phosphor screen;

11 is a perspective view of a multi-screen picture

tube construction with a single electron gun for the generation of three separate screen images lying next to one another;

Fig. 12 is a perspective view of a further embodiment a multi-screen cathode ray tube with a single electron gun and six separate light screen areas on the screen;

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FIG. 13 is a vertical section of the multi-unit cathode ray

pipe after Pig. 12 along line 13-13 of Fig. 14;

Figure 14 is a vertical longitudinal section taken along lines 14-14 according to Fig. 13;

15 is an enlarged perspective view of the electron gun; which is used in the cathode ray tube according to FIG

16 is an enlarged side view of the metal electron gun;

17 is a fragmentary rear view of part of the three-colored luminescent sohirraee, the only generation of one tri-color image is usable;

Flg. ITA a top view of the hole pattern of the screen grid and the first anode for a tube with six channels, which have a three-colored screen as the middle screen of the upper one Row has.

The cathode ray tube according to the invention can generally be used as Cathode ray tube with a single electron gun be described with several rays and several colors "the one single glass bulb and sohmale strips of has color-absorbing luminescent materials, the / a band or set of several strips are arranged, which the Sehirmflache or transversely spans the screen of the cathode ray tube. One The number of bands, in which a number of phosphor strips are arranged in a certain sequence, is with spaced vertically to the image area of the cathode ray tube to cover so that a repeating sequence of phosphorus strelfen is created. The number of from that

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electron beams generated by a single xathode transformer generation system corresponds to the number of different colored fluorescent strips that a single strip of iron fluorescent * or Form phosphor streaks. The electron beams are going across deflected the image surface of the screen, and the individual deflection movements run progressively downwards over the screen surface in a way that corresponds to the formation of the usual grid or deflection pattern on a standard television picture tube In one example, a two-color display can be used, for example, as a readout display for a computer or for any other imaging application through the use a single electron beam system in which two beams are generated, which are deflected along phosphor or fluorescent strips, each made of two strips consist of a convincing mass of Leueht, for example a Nagenta-producing luminous material and a green-producing one Luminous material. Alternatively, an electron gun according to the invention can be constructed so that it three beams for generating differently colored fluorescent strips, each one of the number of form the fluorescent screen area forming strips, wherein the. three fluorescent strips of each band one magenta, Cyan and green glow or produce fluorescence · A such agitator can be used to produce three-color displays on the screen for computer readout and similar display applications or for use as a color television tube for conventional color television receivers. The following Description is directed to a preferred embodiment, the three electron beams from a single electron gun produced three fluorescent strips with different color, which are generally horizontal in each of a number of with vertical Spaced bands that cover the screen surface to provide a three-color display, such as for television

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to generate receivers and the like.

In the drawings, in which the same reference numbers have been used for corresponding parts in the different figures, the multi-beam cathode ray tube having a single cathode is indicated generally by the reference number 15. This cathode ray tube comprises a single Glaekofcen, with an elongated neck part 16, and a screen part 17 which has a larger cross-section than the neck part and which ends in the screen 18. In the exemplary embodiment shown, the screen 18 has a completely different distribution of the three-color fluorescent material instead of the pattern of phosphor or phosphor dots for generating the three color components for the color image, which is usually used in shadow mask tubes. In this cathode ray tube, the three-color phosphor is arranged in generally horizontally extending strips 19 which are arranged close to one another in the vertical direction so that they cover substantially the entire screen surface of the screen. Each band consists of three substantially horizontal strips of fluorescent material, as _{indicated at 20R 9} 20B and 200, which produce red, blue and green light, respectively, when activated by an electron beam. Although the direction of the longitudinal axis of the fluorescent strips 2OR, 20B and 200 and of the ribbons 19 'formed from such three-colored fluorescent strips has hitherto and also in the following often been referred to as horizontal or generally horizontal, it is understood that the direction of their Longitudinal axes actually incline at a slight angle to the horizontal. This is necessary because this angle occurs in the successive deflection movements of a deflection raster produced on the screen of a conventional color television tube, and it can be understood that the term "horizontal" as used here has this slightly

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inclined «should exist in a transverse direction and not exactly in one direction to indicate horizontal direction. The parallel fluorescent strips 2OR, 2OB and 200 can be used as fluorescent strips 0.2 to 1 ram (0.008 to 0.039 inches) in width or more with the preferred width about 0.25 mm (0.01 inches) for a three-beam picture tube or about 1 mm (0.039 inch) for a display cathode ray tube with 35 rays. Any fluorescent strip is preferred separated from the next by a margin of about 0.025 to 0.125 mm (0.001 to 0.005 inches) wide, the preferred safety distance is approximately 0.05 mm.

The three colored fluorescent strips 2OR, 2OB and 200 are excited or activated separately by three electron beams, which are arranged in the fluorescent screen area with a vertical distance so that they are separated along their respectively associated Fluorescent trelves 2OR, 2OB and 2OG run. The three electron beams are emitted by a single electron gun generation system generated, generally designated 24 is and in the rear part of the glass neck part 1.6. the cathode ray tube is arranged. It can either be a standard deflection yoke be provided surrounding the neck of the tube to cause a magnetic deflection of the electron beams, such as it is common practice, or the electron beam may pass through electrostatic baffles placed in the glass envelope be electrostatically deflected. The electron beam generating system 24 is constructed so that there are three parallel electron beams which are sohematically designated as 25R, 250 and 25B and which are normally without a change due to modification voltages have substantially uniform intensity and uniformity along the path of the beam Brightness of the emission from the three fluorescent strips. The electron gun 24 includes a framework for pre-assembly, which generally extends lengthways

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extending frame part · or rods 26 made of glass or the like is indicated, which directly or indirectly a cathode generally designated 27, a control grid generally designated 28, a first anode 29, a focusing anode 30 and hold an acceleration anode assembly 31. The control grid, the first anode, the focusing anode and the accelerating anode for example, with end portions of tether wires or strips during assembly of the electron gun are spot welded with the retaining wires or strips extending from the elongated frame bars 26 and are embedded in these with their other ends. Furthermore, the cathode is supported by the control grid so that the entire electron gun as a unit during of manufacture in the neck section of the cathode ray tube can be used "

As can be seen in particular from FIGS. 4, 5 and 6 the cathode 27 is formed from swei sheet metal parts, such as, for example, two nickel sheet metal parts 32, 33 which have a thickness of 0.25 mm (0.010 inch) each shaped to have an outwardly projecting frustoconical shape or form channel-shaped bulges 32A, 33A which extends above the height of the cathode, the channel shapes forming bulges 32A, 33A have outwardly converging, in the same way inclined sides 34A and a flat outer wall 3 * B, which to the Main * or central plane of the cathode runs parallel and the the channels have a frustoconical shape or a truncated one Gleiohschenkelig triangular shape. The flat outer walls 3ΊΒ extend see over the full height of the cathode and the Sheet metal parts 32, 33 are, for example, spot welded so assembled at their corners that they form rigid and stable cathode structures, with the ones in register frustoconical bead parts 32A, 33A together with a tunnel hexagonal or honeycomb shape in order to provide the heating

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winding or turn 35 to include. The cathode height can be between 10 and 15 mm to facilitate the mounting conditions and a preferred embodiment has a height of 15 mm and an overall width of 7 mm, the flat outer walls 3 ^ B having a width of 3 mm. The heating winding or turns 35 are preferably formed from spiral-shaped tungsten turns, which are designated by 35 and, for example, have a length of approximately 16 mm and an outer diameter of approximately 2 mm. These tungsten turns are covered by an insulating layer of high temperature ceramic, such as aluminum oxide or fused aluminum oxide or other suitable coating material. In the preferred embodiment, a heater with double nested coils is preferably used, the coils being wound such that one of the heating windings has clockwise turns and the other has counterclockwise turns which mesh up to 50½ of the coil diameter for maximum heat at the center Area of the cathode and at the same time to eliminate alternating current frequencies by phase cancellation, which would result from heating with a single phase heating the cathode to operating temperature, which ensures that the flat cathode surface 3 ¹ IB remains parallel to the control grid for maximum electron emission efficiency. In order to achieve high electron emission from the flat cathode wall or surface 34B, this surface is coated by spraying, painting or electrophoretic deposition of a conventional cathode material, for example as it is commercially available under the name "Tri-Carbonate * ¹ , or it becomes a Oxidtiberzug used, for example with a thickness of about 100 to

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250 microns over the width of 3 mm and the height from IO to 15 mm the flat cathode surface 34B is deposited. This Kathodenflberiug over the flat cathode surface 34B is through a Layer of organic varnish protected against atmospheric poisoning until the cathode ray tube in the final Manufacturing stages is activated.

The control grid 28, shown in detail in Figures 3, 6 and 7, provides control for beam intensity and current of every single ray. The control grid 28 has when viewed from the screen of the tube in plan view a generally oval in shape and comprising a ceramic substrate or plate 36 having an oval profile that conforms to the substrate is similar to a printed circuit board and has a truncated cone shape Has recess or trough 37 which extends over the greater part of its height and sloping forward converging sides, top and bottom walls the ceramic substrate 36 has three holes or openings 38R, 38b and 380 arranged in a vertical row and are aligned with the vertical center line of the substrate 36. The substrate 36 can in a preferred Ausftthrungsbeispiel a width of about 15 mm, a total height of approximately 20 mm. The recess or trough in this substrate can be 2.5 mm wide at the base and 5.5 mm at the plane of the substrate surface «through which she opens. The vertical height of the recess can be 15 mm at the base and 16 mm at the plane of the substrate. When used with the cathode 27, the coated emission surface 34B thereof has a width of 3 mm and a height of 15 mm, the recess 37 », which only has a width of 2.5 mm at its base, takes up the greater part the opposite half of the hexagonal shaped sausage part and the 2.5 mm width of recess 37 maintains a spacing between the coating on flat surface 34B and

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the opposite part of the ceramic substrate upright. The ceramic substrate has a thickness of approximately 3 rom, with the three openings 38R, 38B and 38G in this substrate are arranged with a center-to-center distance of 5 mm and have an inner diameter of about 3M mm in the final coated or plated state. These control grid openings have stepped entrance and exit ends that pass through an annular opening portion of slightly larger cross-section is formed at the input and output ends, such as

it in the German patent (German patent application

P22 40 82 ^ * 8) is explained and described. The ceramic The substrate is provided with a gold plating, which is formed, for example, by first having an initial thickness of approximately 1000 S of QoId is deposited by a vacuum process known as sputtering. The sputtered layers of gold those on the starting surface of the substrate (the surface that directed at the screen of the cathode ray tube) and applied to the inner walls of the qitter openings 38R, 38B and 38G ensure that the electroplated metallic gold adheres firmly to the ceramic substrate. That Control grid substrate is then electroplated to increase the thickness of the gold layer to approximately 0.025 mm (0. CDlZoIl). Alternatively, copper can first be applied to the ceramic substrate, after which the substrate is then galvanically nickel-plated to achieve a thickness of approximately 0.025 mm (0.001 inches). After the galvanic treatment of the control grid can it is provided with a coating of photosensitive etching varnish e.g. with the KPR or KMER or KTFR etching varnish the PA. Eastman Comp. This photosensitive etching varnish will then exposed to a precise photographic glass plate which left a negative image of the control grid openings and the mounting metal path which leads to the conductor connections on the upper part of the substrate shown in FIG. 7 and

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the Xtslack is then made according to the manufacturer's recommendations processed to make the unwanted metallic «Oold or To etch away the nickel. This results in a control grid substrate with Metallic Oold or Nickel conductor paths, which are in Pig. 7th are designated by 39. The substrate 36 and the metallic parts of the control grid are duroh a nickel-Absohirmhulee or shielded tube, which is designated 40 and on which Perimeter of the substrate 36, for example, by a press fitting of the substrate is attached to the shield · This shield reduces external interference from electrical or magnetic sources. The cathode 27 is on the control grid substrate fastened with the help of suitable fasteners or fastening pins, the beseiohnet with 41 and to the Corners of the cathode 27 and the substrate of the control grid 28 are attached.

On top of the control grid arrangement described above there are a number of advantages. It has been found that although a substrate diameter of 1 mm or less could be used to achieve control grid openings of suitable axial length that manufacturers are working with do not want such great thicknesses and such small dimensions. Duroh use a substrate thickness of approximately 3 mm, which is executed in simple Heise duroh the manufacturer can be and by using the frustoconical or truncated-V-shaped recess or trough 37 for receiving the forwardly protruding one half of the hexagonal or truncated triangular part of the cathode and a width of the base of the recess, which is narrower by 1/2 mm, as the width of the emitting surface of the cathode, there is a separation between the metallic plating of the opening for the control grid and the oxide cathode coating. In addition, the insertion of the cathode part into the recess results in a Shielding against leakage of stray emissions, e.g.

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X-rays "

Instead of forming the mesh opening linings and the grid connections made of electroplated nickel »gold or For other non-oxidizing metal conductors, openings with larger durometer diameters can be provided in the substrate 36. In these cases are thin strips of metallic conductor material with annular central parts that are equal to or slightly larger than the holes in the substrate on the The front or rear surface of the substrate is provided to seal these holes, with openings with 3/4 mm Durohmesser are provided in these annular parts of the metallic conductor strips. The opposite ends of the strips could be attached in slots in the substrate or, in some other way, to this substrate and the ends of the metallic Conductor strips on one side or an edge portion of the substrate will provide a terminal connection for the wires, which lead to the control grid circuit.

The oval Niokelabsohirmung or sleeve 40 can expediently be created by using a nickel tube with a circular cross-section and a suitable diameter, which is placed in a die to shape the shape to an oval shape, whereupon the blow dryer is then rolled to make the Nickel shield shape shown in the drawings. The ceramic substrate can then in a simple manner press fit into niokel shield 40 to complete assembly of the control grid. By Use a substrate at least 3 mm thick Difficulties in pressing the substrate into the nickel shield eliminated due to the increased resistance of the substrate.

The first anode 29 has a construction similar to that

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Control grid on because it uses a ceramic substrate 42, that can be identical in size and shape «like the control grid substrate 36. This ceramic substrate 42 of the first Anode has openings 42R, 42B and 420 in the same way, which correspond in their number and arrangement to the openings in the control grid, although they correspond to the recess 37 in the control grid substrate corresponding recess or trough in the substrate 42 for the substrate of the first anode superfluous and unnecessary economical manufacture can be achieved by using the same substrate construction and the well or recess in the substrate of the first anode is only in alignment with the screen of the cathode ray tube is judged. The entrance or back area of the first The anode of the substrate 42 is provided with a layer of metallic Ctold or metallic nickel, which is applied to this substrate is electroplated and etched in a manner that is similar to the etching process used to form the conductor parts of the control grid was used. In the preferred embodiment have openings 42R, 42B and 420 in the Substrate of the first anode has such a Durohmesser that they plated openings with 1 mm Durohmesser for the finished or openings provided with a metal layer in the. first Anode. A shield 43 ″, which is similar to the shield 40 of the control grid, surrounds the first anode substrate, wherein this anode substrate is press-fit into the shield.

The focusing anode 30 is located directly in front of the first anode 29 or in alignment with the screen. The focusing anode comprises, in the preferred embodiment, a front oval tube section 45 'formed from a nickel tube which has been given an oval shape with the corner in one of the nickel abutments 40 and 43 for the control grid and the first anode is rolled like catfish. The back end

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of the oval nickel tube section 45 is bent inward, like it is sloped at 45 * to match it with the vertical back wall 46 to connect, which can be formed in one piece with the oval tube 45, or which is welded to the oval tube section or attached to it as desired. The rear wall 46 is aligned with three in the vertical direction provided openings into which three vertically aligned rearward extending beam separation tubes 4? R, 47B and 47S are used. Each of the tubes 47R, 47B and 470 is approximately 5 rm in diameter and has its leading edge on the rear wall 46, for example with the aid of fastening tabs 48 by spot welding on the front surface of the Rear wall 46 attached. The separation tubes 47R, 47B. And 470 are also spot welded to one another to form a one-piece Assembly and have rear focus openings 46R, 46b and 460 each approximately 1.5 mm in diameter. As will be described below, one is controlled Voltage of approximately 5000 V is applied to both the oval tube segment and the separator tubes 47, causing the focusing anode serves as an electronic lens to focus the rays. In a preferred embodiment, the oval Nickel tube segment 45 a width of about 15.mm and one Height of about 20 mm. The width of the flat part of the rear wall can be approximately 10 mm, the axial length of the oval Pipe segment 45 can be approximately 14 mm and the axial The length of each of the beam separation tubes 47R, 47B and 470, which are 5 mm in diameter, can be approximately 6 mm. roll the leading edge of the oval pipe section 45 to ensure a burr-free edge, so that a distortion of the field is avoided because any point where there is a ridge distorts the field instead of supporting it. The purpose of the smaller diameter segments formed by the separation tubes 47R, 47B and 470 is to show in to achieve a higher field strength in the vicinity of the first anode 29,

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than it could be achieved with separating tubes that are too large, than that they are inserted into the nickel shield 43 and up close could reach the substrate of the first anode.

Alternatively, the focusing anode can be formed in a simple manner from three deep-drawn nickel tubes which are each spot-welded one above the other in a vertical stack and which each have rearwardly extending sections with a smaller diameter. For example, the front segment of each of the three larger diameter tubes may consist of tubes 5 mm inside diameter and approximately 16 mm in length, with the front edges rolled over and bent inwardly to form an annular back wall which has a central opening with a diameter of 3 mm. A rear nickel tube segment with an outer diameter of 3 mm and a length of approximately H mm is inserted with its front end into the 3 mm opening in the rear of the front nickel tube segment with an outer diameter of 5 mm. The edge of the smaller pipe is bent outwards and spot-welded to the rear wall of the front pipe with a larger diameter and the rear end of the pipe segment with a smaller diameter (3 mm) is rolled inwards, around an opening with a diameter of approximately 2.5 mm to build. These three pipe assemblies, each consisting of the front pipe segment with a larger diameter and a rear pipe segment with a smaller diameter, can then be attached to the sides of the larger front pipes with one or two

vertically extending fastening strips are spot welded so that the centers of their openings one Have a distance of 5 mm.

In front of the focusing anode 30 and towards the screen there is the acceleration indicator assembly 31 * which is more detailed is shown in FIG. The acceleration anode

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Order 31 includes a cylindrical front pipe section or a segment 50 made of nickel material with a 0.25 mm (0.010 inch) thick. This segment is arranged concentrically to the axis of the neck part and points a rear vertical wall 51, also made of nickel, on, in of the three aligned openings with a durometer of approximately 3 mm are provided, those with 51R, 51B and 5IQ and have a center-to-center distance of 5 mm. A vertical row of three cylindrical partition tubes 52R, 52B and 52Q extends rearward from the vertical wall 51, each formed from seamless nickel tubes with a diameter of 5 mm in a manner similar to that of the tubes of the focus r anode is similar. These nickel tubes are diametrically opposed oppositely extending lateral fastening tabs 53 to spot welding the rearwardly extending Separation tubes 52R, 52B and 520 with the wall 51 of the front tube segment 50 to allow. If so desired, a oval nickel shield 5 ^ used in the same The way the nickel shields 40 and 43 are designed, the leading edge of the nickel shield being spot welded to vertical wall 51. If so desired, you can Mounting tabs may be provided at the front end of the nickel shield 54 to facilitate spot welding. To the Maintaining the separation of the three electron beams passing through the front pipe section 50 are im essential semi-cylindrical beam separating elements 55 are provided, the substantially semi-cylindrical concave end parts 55A formed at the ends are supported by flat parts 55b which extend to the cylindrical wall of the pipe section 50 and are spot-welded to this. Alternatively, 5 mm thick seamless beam separation tubes formed from 0.25 mm (0.010 inch) thick nickel or similar material, coaxial to the extended axes of the openings 51R * 51B and 51Q with a diameter of 3 mm, whereby this separation

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pipes with the help of spot welding flaps on the vertical wall 51 can be attached in a manner that allows for attachment the tubes 47R, 47B and 470 of the focusing holes are similar is.

An Oetterring 56 in the form of an annular forward-facing Ducts! Ententes 56a is in front of the leading edge of the pipe part 50 attached at a distance to an elongated bracket 56B. Three metallic contact parts 57 extend from the pipe section 50 of the acceleration anode to the front and form resilient mounting parts with outwardly convex end parts 57a which against the inner surface of the neck portion of the cathode ray tube bulb abut and in contact with the graphite layer coating stand while holding and aligning the front end portion of the electron gun and make electrical contact with the high-voltage anode. In one embodiment of the acceleration anode, the front pipe section 50 has an axial length of 17 mm and a diameter of approximately 24 mm. The one to the rear extending shield part 54 has an axial length of 13 mm, a height of 20 mm and a width of 15 mn. The Oetterring has an outer diameter of approximately 24 mm and is arranged at a distance of 15 mm in front of the front edge of the pipe section 50. The Oetterring continues to show has an axial depth of about 2 mm and the contact strips 57 can extend forward from the pipe section by about 13.5 mm 50 from extending, the curved end portions of these contact strips up to a maximum distance of approximately 15 mm from the axis of the acceleration anode are bent outwards.

The elongated frame parts or rods 26 described above, on which the shielding parts 40, 43, 45 and 54 of the Control grid, the first anode, the focusing anode and the

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Accelerating anode fastened with the help of fastening pins are fixed in the frame or support rods 26 and which are spot welded to the shields form one integral subset of each of these electron gun elements and the cathode 27 which is rigidly supported by the control grid 28. This gives an expedient Subgroup arrangement for installing the electron gun into the neck portion of the bulb of the cathode ray tube. Cathode ray tube bulbs are usually used to start with open part of the neck and therefore the electron gun subgroup described above can be easily Way through the back opening of the neck part in the Ahtige Position can be inserted within this neck part, with the foremost part of the electron gun through the contact parts 27 is supported, which with the inner surface of the The neck part are in contact. The connection ports for the various elements, such as the connection ports on the upper edges of the control grid and the first anode, conductors are connected to suitable pins that are in a usual glass base for the cathode ray tube are previously inserted and the shielding parts of the focusing anode and the accelerating anode as well as the heating connections of the cathode are connected to suitable pins in the glass base, whereupon the Glass base with the edge of the rear opening in the neck part of the Glass bulb is fused and thus sealed. This makes the connections from the various elements of the electron gun on the pins in the glass base a holder for the rear end parts of the electron gun « In a preferred embodiment, the connection terminals on the control grid and extend the first anode spot-welded conductor pins through bushing inserts made of glass or ceramic, the 401 and 431 and are fixed in the holes of the shields 40 and 43, the outer ends of these pins with

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3098 2 2/0923

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Conductive strips are spot welded to the pins Lead 16p in the base to form these connections. After a vacuum in the bulb of the cathode ray tube over a Connection was created in the glass base, which is connected to the end of the Neck part is sealed, this connection is melted to seal the opening and the rear end of the neck part complete.

The luminescent screen or screen surface 60 is formed on the rear surface of the front plate of the glass bulb and in the preferred embodiment the multicolored phosphors are arranged in parallel strips which are essentially horizontal and in practice are inclined by approximately 0.5 ° from the horizontal . For a three-color arrangement, as is required, for example, to produce a color image for a color television receiver, the phosphors are arranged in the manner shown in FIG Light and a lower fluorescent strip 200 for generating green light. These phosphor strips 20R, 20B and 200, which form the three color components for the color screen in this example, are arranged in a vertical row of bands, indicated generally by the reference numeral 19. Each band laterally spans the screen area and a sufficient number of bands are provided so that the entire vertical extension of the screen is covered. For example, the entire vertical width of the tape 19, which is formed from the three primary color phosphor stripes in a übliohen 525-line system about 0.85 mm (0.03 ¹ I inch), wherein the phosphor stripes 2OR, 2OB and . 2OG each have a vertical width of approximately 0.25 mm (0.010 inch) and a safety margin with a width of approximately 0.05 mm (0.002 inch) is provided between each successive fluorescent strip.

- 25 -

309822/0923

■ 22575A0

see is. It will be understood that the phosphor strips can be deposited in various widths ranging from 0.125 to 1 mm (0.005 to 0.039 inches) with the width of the safety bands or spacing between 0.05 and 0.025 mm (0.002 to 0.001 inches). depending on the specific applications and the number of different colors to be displayed. In the example described, the fluorescent strips, such as the strips 2OR, 2OB and 200, are deposited on the inner surface of the front plate in strips located at 0.3 mm centers with the aid of the same electrophoretic process and the fluorescent screen forming process as in the German "Patent ..... (German patent application P22 46996ο) <* ^{ββ by the} same applicant, but with the exception that the phosphor material and the underlying conductive base layers are arranged in the form of strips with a uniform suitable width, for example 0.25 mm spanning the screen or picture surface transversely and not in the form of interconnected chains of circular conductive pads and the spaced circular phosphor dots formed thereon as produced in the process of the aforesaid patent.

With such an arrangement of transverse fluorescent strips each having a vertical width of about 0.25 mm, it will be understood that three have a vertical spacing having electron beams that are spaced between centers of about 5 mm corresponding to the distance between the centers of the Beam openings in the grid and anode elements of the electron gun generation system, must be converged and focused in points that are 0.3 mm apart (0.012 inches) on the screen so that the correct rays are aligned with the associated fluorescent strips lie. This is done in the preferred embodiment

- 26 309822/092 3

the use of adjustable permanent magnets 64a ₉ 64a achieved above and below the electron beam generation hysteresis outside the Haisee of the glass envelope such that the upper magnet 64a is adjustable so that the upper electron beam is bent down into the desired position, while the lower Permanent magnet is adjustable so that the lower electron beam is bent upwards into the desired position. These adjustable magnets can be movably mounted in plastic mounts, generally designated 65, which are carried, for example, by a mounting strip 65a which indicates the neck portion 16 at a location near the acceleration anode, with the magnets 180 ° to each other offset and aligned with the vertical plane through the three electron beams. The magnetic strength is selected so that the desired degree of converging movement of the upper and lower beams is achieved without crossing their axes and without affecting the path of the central beam. The strength to achieve proper convergence changes proportionally to the potential at the acceleration anode, requiring low strength magnets for a potential of 25,000 volts and high strength magnets for a potential of 15,000 volts. The strength of the magnets is usually within a range of about 50 to 250 oauss.

The construction described above results in the use of a three-color television picture tube or a cathode ray tube for general three-color presentation or display applications a cathode construction with a honeycomb or hexagonal bead shape and a flat surface. Emission plate, which are equally spaced at the respective Beam openings in the control grid and the first anode is removed in order to achieve a uniform electron current density to ease in the rays.

- 27 309822/0923

- J2T -.

The special construction of the cathode ensures minimal cathode bending due to the heat of the Kels threads and the double compensating and interlocking threads result in maximum heat in the central area of the cathode and simultaneously eliminate all unwanted polarity effects. The construction of the cathode, in which the cathode plate has a width of approximately 3 ram, together with the use of grid openings with a durometer of approximately 3/4 mm and openings with a diameter of 1 mm in the first anode, enables very strong ones to be produced Electron beams which can excite the fluorescent strips in such a way that very high optical energy levels are achieved, which allow up to 10 times the amplification for information display cathode ray tubes. The nickel shieldings 40, 43, 45, 50 and 54 reduce external interference from electrical or magnetic sources and also facilitate the mechanical fastening of the elements of the electron gun to the support rods or frame parts. These shielding elements also reduce the stray radiation that would otherwise occur between the Elements of the electron beam extraction system could leak. The construction of the elements of the electron gun suction system is such that their manufacture and assembly in a stable and reliable arrangement for the electron gun suction system is facilitated and that this electron gun can generate one or a plurality of electron beams with a high electron current density, so &&& the fluorescent strips give you very good radiance. result in high resolution in the image generated on the cathode ray tube screen »

In one embodiment, a three-tube cathode ray tube for use in color television were the potentials of the various Elements chosen within the following areas,

- 28 -

309822/0923

since a satisfactory mode of operation was achieved.

Element V voltage Cathode + 100 to + 300 Control grid + 10 to + 200

first anode ♦ 150 to ♦ 1000

Focusing anode * Ί000 to ♦ 5500 Acceleration anode. +15000 to +25000 In an advantageous example, the cathode voltage was

+ 100 V ₉ the voltage of the control grid was ♦ 10 V, the first

The anode had a voltage of + 150 V, the Fokujs a if runge anode

had a voltage of + 4000 V and the ⁷ acceleration anode and the voltage at the front end of the tube was ♦ 15000 V.

An electron beam extraction system for example 35 electron beams for information display cathode ray tubes and the like of the general kind described in German Patent Specification (German Patent Application P22 40 824.8) by the same applicant can be used with a construction of the control grid, the first anode, the focusing anode and the accelerating anode can be constructed generally of the construction of the three-beam electron beam aspiration system described above instead of the construction of these elements being carried out in this way as set out in this aforementioned patent. The cathode would be in such a 35-beam beam diffraction system preferably have five hexagonal bead parts, the five vertically elongated flat emission plates similar to the plate 31b described above

- 29 309822/0923

Construction would form, with double compensated heating coils would be used in each bead portion, as was the case with the three-jet pipe described above. The substrates for the control grid and the first anode would have 35 jet openings instead of the 3 jet openings, corresponding conductor connections along connections the edges of these substrates would be provided. These conductor connections can be made in a manner similar to the Way is similar to that in the German patent specification (German patent application P 2240824.8) of the same Applicant is described, preferably in the form of print circuit techniques, as they were further 'oban described. The focusing anode and the accelerating anode will be in this case modified in a suitable manner so that 35 jet separation tubes and 35 jet openings result, and in place of the three tubes and three openings, as they were described in the previous embodiment. at such a display cathode ray tube, which is designed, for example, for a two-color display, the Fluorescent strips in alternating strips with different Color, for example red and green, or red and blue, or green and blue, or red and white, are arranged, with each of the fluorescent strips could preferably now have a width of about 0.975 and a security strip of 0.025 mm between each successive pair is arranged by fluorescent strips. That way you could for a vertical distance of 25 mm (1 inch) along the Screen surface a total of 25 fluorescent lines should be provided, 13 of which would have a first color and 12 a second color, alternating with the luminous cables of the first Color are arranged. The 35 beams know in the usual way by either magnetic or electrostatic beam deflection devices can be deflected and the control grid can be controlled by suitable signals, for example from

- 30 309822/0923

ORlGiNAL

a computer programmed to generate characters in such a way that alphanumeric representations are generated in one of the two colors by exciting the appropriate color of the fluorescent strip. The electron gun described results together with parallel fluorescent strips, which are arranged in the manner described in bands parallel to the direction of the deflection lines of the electron beams, an image with very high resolution and sufficient brightness to achieve representations with high flexibility. For example, kaggj's 35-beam beam generating system along with 0.975 (0.039 inch) wide fluorescent strips produce single color displays from H to 8 lines of drawing per 25 mm, with the height of the characters in the range of 3 - 0.6 mm (0.125 to 0.025 inch) for a direct view of the representation lies. Alternatively, two to four lines of drawing in two colors per 25 mm can be generated for direct viewing in this way. Furthermore, with this arrangement, up to 25 lines of lines per 25 mm of vertical height can be generated with this arrangement (if the vertical height of the 7 vertical rows of 35 rays is concentrated on the width of 0.97 of the fluorescent strips), or 12 lines of lines can be produced per line 25 mm can be produced in two colors if a projection view is to be used. The resolution and contrast provided by this cathode ray tube is such that the image can be projected from 3 to 10 times magnification while maintaining contrast and legibility.

11 to 17A of the drawings are multi-ohmic cathode ray tubes which are indicated generally by the reference numeral 110 and which are generally a single glass envelope include. This glass bulb has an elongated neck portion 111 and a front plate portion 112, the one has a larger cross-section than the shark part 111, and the in

- 31 309822/0923

-H-

a screen 113 ends. In the one in Pig. In the exemplary embodiment shown, the screen 113 has, instead of a single luminescent screen area, three luminescent screen areas, which are labeled 114A, HiB and IMG the screen 111 »A could consist of a phosphor which produces red light, while the screen 114B could consist of a phosphor which produces yellow light and the screen HIJC could consist of a phosphor which produces green light. If the cathode ray tube were to be used as a telemetry display when starting steerable plug bodies, the appearance of an image on the green light generating phosphor screen H ¹ IC could indicate that everything is going well, the presence of an image on the yellow light generating phosphor screen 114B would be one Indicates a condition requiring precaution and an image on the red light generating phosphor screen 114A could indicate that a driving condition exists. Typically, the front panel may be provided with outwardly projecting depressions, as shown at 12 * IC and 124E in Figure 1Ί, corresponding to the size of each of the screen faces, with the fluorescent coating being provided on the flat surface at the base of the depression , which defines the inner surface of the glass bulb and wherein the inner surface of the front plate and the glass bulb parts adjoining it could then be coated with a reflective aluminum coating, as is common in the industry.

The electron gun for this cathode ray tube 115 can be constructed in the general manner as the embodiment of the electron gun after the pig. 1 to 10, or it can be as follows

- 32 30 9822 / Ό923

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22575A0

A plane construction can be used »being the electron scatterer suction system in any case in the posterior veil of the Qlas-Htlsteile 111 arranged lit. The usual deflection yoke 116 for the magnetic deflection of the electron beams surrounds the Haieteil 111 according to normal practice. The electron gun 115 is generated in this exemplary embodiment three laterally aligned separate electron beams, the schematize *! are rewarded with 117A, 117B and 117C in Pig * 11.

Another embodiment of a multi-screen multi-beam cathode ray tube is disclosed in the Pig. 12, 13 and 14 shown. This embodiment comprises a glass bulb with an elongated neck part 121 and a front plate section 122 which has a larger cross section than the neck part and ends in a front plate 123. In this exemplary embodiment, the front plate 123 carries six different phosphor regions, which are designated with 124A to 124F and which are arranged in two rows of three phosphor screens each. The six fluorescent screen areas 121A to 124F can be used in the same way as in connection with Pig. II has been described, be formed by protruding depressions in the front panel, as shown at 124C and 124p in FIG. The chemical material is deposited on the inner surface of the flat base wall of each well. In a preferred embodiment, the various Leuohtschirme 124A can be up to 124F selected so that the screens generate 124A ₁ 124B and 124C, respectively green, red and blue Lioht and that the lower row of screens 124D, 124E and 124F white, yellow and orange Lioht produce . Of course, if so desired, one or more screens can be a screen which produces a composite color image made up of the three primary fluorescent colors, as is customary in color television.

- 33 -

3 0 9822/0923

22575Λ0

The electron beam suction window for the exemplary embodiment according to FIGS. 12, 13 and 1 * is calibrated and designed by the submissions ei ff er .25, so that it generates separate electron beams, one for each of the fluorescent tubes 124A to 124F. If one of the screens, for example screen 124B, were to be a color phosphor screen having three color components, of course, three electron beams will be required for that particular screen. These three electron beams can be vertically spaced apart, the tri-color phosphor would be seen in horizontal stripes, as shown at 124B-1, 1248-2 and 1243-3 in Figure 17, so that alternating bands of tri-color phosphor stripes are formed . Each fluorescent strip for each color component is scanned by its own associated beam, as described below, so that the shadow mask can be omitted. For example, green, magenta-colored and cyan-colored phosphors can be used for the strips 124B-I _{1, 12ÜB-2 and 124B-3.}

An example of the design details of the electron beam diffraction system for the exemplary embodiment according to FIGS. 12 to 14 is in Flg. 15, where this electron * Radiation system electrostatic baffles for a vertical and horizontal deflection of the associated electron beam is used. An electron beam diffraction system for Multi-beam multi-screen cathode ray tubes with a magnetic The deflection yoke is of similar construction, but without the electrostatic deflection plate parts.

In the Flg. 13, 14 and 15 close the electron beam diffraction system a cathode generally designated 127, a control grid generally designated 128, a first anode. 129 and an array of accelerating anode tubes 151 and Focusing anodes 130, which are placed between ceramic mounting brackets

- 34 309822/0923

plates 132, 133 are supported. These elements are all beforehand assembled on a support framework, the general

from
my frame parts extending in the longitudinal direction in the form y6i.cn

is shown holding the rectangular, plate-shaped parts 128, 129, 132 and 133, so that the entire electron beam generation system can be used as a unit in the neck part of the cathode ray tube during manufacture.

Like it in particular from Pig. 15 can be seen, the cathode 127 is made of two sheet metal parts, e.g. the sheet nickel parts 135 » 136, each having one or more parallel outwardly projecting rib or channel parts 135A, 136A with outwardly converging in the same way inclined sides and flat outer walls parallel to the main plane of the cathode extend so that the channels have a truncated isosceles triangular shape. If a single horizontal row of several electron beams is required, e.g. in the case where the number of phosphor screen surfaces is horizontal is aligned side by side, as for example in FIG. 11, there is only a single channel part for the two sheet metal parts 135 and 136 are required to form the cathode. When two horizontal rows of multiple electron beams are required are, as is the case with the six screen surfaces of the cathode ray tube according to the Fiρ. 12 to 14 are the case, there are two such oppositely directed channel parts are provided for each of the sheet metal parts 135, 136, which extend along parallel horizontal axes that span the entire width of the cathode 127. The sheets 135 and 136 are at each end and between each of the elongated channel parts by spot welding assembled, so that there is a very rigid and stable cathode construction. The heating coils are formed from tungsten heating coils 127F, which are covered by an insulating layer of ceramic, such as aluminum oxide or fused alumina. This honeycomb

- 35 309822/0923

22575AQ

for long construction, which eioh eueammengesateten. Bleohtn 135 and 136 with then automatically protruding! Canal-. dividing forms «results in maximum resistance against *. Heat distortions due to the heating of the * cathode to operating * temperatures, so that it is ensured that the flat front surface labeled 135B remains parallel to the control grid, so that maximum efficiency of electron emission is achieved. In order to achieve high electron emission from the cathode, the flat surfaces 135B are oversaturated by spraying, brushing or electrophoretic deposition with a conventional cathode material, such as is commonly available commercially under the name ' ¹ tri-carbonate ". This cathode material is made by a layer of organic lacquer protected from atmospheric poisoning until the cathode ray tube is activated in the final stages of manufacture. The rectangular, parallel cathode surfaces 135B on which the cathode material is deposited have a sufficient axial length extending from one end extends from the cathode to the other, so that a maximum electron emission of up to 7 controllable grid openings with a sufficient current density is ensured, whereby each electron beam can have a current of 50 to 60 microamps and erlei The production is protected by machine punching and embossing.

The control grid denoted by reference numeral 128 in this embodiment has the general shape of a rectangular plate, similar to the board or substrate for a printed circuit board, and is provided with a number of holes or openings 128A. These openings 128A are arranged in a row or several rows, which are aligned with the central axes of the flat part or the flat file 135B of the cathode carrying the cathode material. It is just

- 36 -

3 0 9822/0923

a · a row with three holes 128A for the cathode ray tube with three channels according to PiR. II required, while two rows with three tubes 128A each are used for the cathode ray tube with six tubes according to FIG. 12. When a three-electron beam combination is used for color television, the vertical spacing of the qitter openings spans a single horizontal channel of the cathode part. An example of the hole pattern for the control grid and the first anode for such a six-screen cathode ray tube is in Pig. 17A, in which three vertically spaced holes 128A-1, 128A-2 and 128A-3 are shown providing three beams for the screen 1246. The beams for holes 128A-I _1, 128A-2 and 128A-3 are deflected horizontally along their respective phosphor strips 124B-I, 124B-2 and 124B-3 to produce a three-dimensional image without a shadow mask. In one example, the phosphor is deposited in strips approximately 0.45 mm (0.018 inches) wide with 0.05 mm (0.002 inches) spacing between the strips and holes 128A-1 _9, 128A-2 and 128A-3 Holes with a diameter of 0.25 mm and a distance of 0.5 mm. In this case the holes in the first anode for the three color beams for the screen 124B are controlled separately in the control grid. The ceramic substrate is provided with the Qitteröffnungen, initial loan one or unplated diameter for example, 0.3 mm (O _(Oll84 inch), each opening a stepped Einganesund output end, formed by an annular opening portion with a slightly larger cross-section at the input and Output ends is formed as it is in the German patent specification (German patent application P 2240824.8)

is described. In this example, the ceramic substrate is provided with a gold plating which is Applying an initial thickness of about 1000 8 of Gold is deposited in a vacuum process known as sputtering. This atomized Qoldschcht is on both upper

309 8 22/0923

Raise the substrate and place it on the inner walls of the oitter openings 128a on gtbraoht to ensure firm adhesion of the electroplating metallic ooldes on the ceramic substrate. The control grid substrate is then electroplated in order to increase the thickness of the gold to 0.025 m * see below. Alternatively, aunäöhst Copper are applied to the ceramic substrate, whereupon the substrate is then galvanically verniokeIt to a Thickness of about 0.025 mm. After electroplating of the control grid it can be overlooked with a coating of a photosensitive Xt lacquer, e.g. with the KPR or KMEH or KTPB-Kt «lacquer from Eastman Kodak Comp. This photosensitive Ktslack is then with a Precise photographic glass plate exposed, which has a negative Image of the control openings and the desired air-to-air metal paths from the openings to the joints on the edge the plate 128 has. The Xtslaok is then according to the Recommendations of the manufacturer treated further to the undesired metallic gold continuations *

The first anode 129 is similar to the control grid 128 in that the ceramic substrate is the same size and shape can, as the control grid substrate and that it is in the same way is provided with openings 129A, which in their number and arrangement correspond to openings 128A in the control grid. However, while the control grid 128 using six openings 128a has six one of its conductive connection paths connected to the Lead grid connections at the edges of the control grid is away from the control grid or directed towards the fluorescent screen Surface of the first anode 129 is provided with a continuous layer of metallic gold, similar to that which is on the Control grid is formed in front of the Xtsen, with the Sohicht of metallic gold on the first anode lecSiglieh through the Jet openings 129A is interrupted. The other® surface the first anode 129, which is directed towards the control grid ", with the exception of one edge around the openings with a

309822/0923 - 38 -

"Width of about 0.025 mm has no QoId.

Immediately in front of the first anode 129 or in the direction of the Screens are cylindrical in alignment with the axes of the control grid openings 128A and openings 129A of the first anode Focusing anodes 130 for each beam as well as a spherical acceleration anode 131 arranged. Each from one Focusing anode 130 and an accelerating anode 131 The pair can be formed from two metal bores spaced along a common axis and are electrically isolated from one another, the rear end of the focusing anode tube 130 in an opening with Corresponding diameter is fixed in the ceramic mounting plate 132, while the front end of the acceleration anode tube 131 in a similar manner in a correspondingly dimensioned opening in the ceramic cold plate 133 held 1st.

Before placing the focusing anode tubes 130 and the Acceleration anodes 131 are electrostatic baffles arranged for each beam. These electrostatic baffles comprise in the illustrated embodiment for each beam vertical deflection plates 140 and horizontal deflection plates 141, which have a tube surrounding the beam form rectangular cross-section. The panels 140 and 141 are at the end of the screen closest to the screen Beam expanded further outwards, are electrically isolated from one another and on the outer elongated frame parts 134 and the inner elongated frame members 134A. These frame members can be support rods made of glass, the have near the inside on the respective elements held by them and have pins connected to them.

Based on the construction described above, the

309822/0923 -39-

slide

honeycomb-shaped cathode shape / carrying the emission cathode material flat surface that extends from each of the lattice openings 12BA is equidistant, so that electron emission is uniform for each of the electron beams and minimal heat distortions the cathode on Orund. the hitse of the filaments Ensure "The control grid 128 and the first anode 129" which use metallic gold make a conductor non-oxidizing or tarnishing metal, which is a suitable Maintains conductivity and which is free of oxidation prior to manufacture and at tube manufacturing or operating temperatures remains stable. The acceleration anode tubes 130 and the focusing anode tubes 131 as well as a electrostatic deflection The horizontal and vertical baffles 140 and 141 are rigid to the elongate Glass frame parts 134, 134A and the ceramic plates 132, held. This results in a total construction of the electron beam generation system that has a number of Electron beams with equal intensity results in a very effective way, and which has improved properties and Has manufacturing capabilities. By using such a construction of the electron beam suction system in a single glass envelope with a faceplate that has a number of fluorescent screens are separated Electron beams for each of the screens in an efficient manner by means of a single electron gun supplied, which allows great flexibility in the type of display that can be made with the cathode ray tube can be carried out.

The arrangement of consecutive groups of three with vertically spaced strips of three-colored fluorescent material, as e.g. at 124B-1, 12HB-2 and 124B-3 in 17 shown at the screen 124B may be used for the screen of a cathode ray tube having a single screen

- 40 30 9 822/0923

- HO -

to bend a three-color picture for color television receivers and the like. In this case it will be the control grid and the first anode each have only three vertically spaced holes! each in a sized and arranged in a manner similar to that of holes 128A-1, 128A-2 and 128A-3 shown in Figure 17A. It just became a single channel portion for the cathode may be required, which forms the flat cathode surface 135B, with the three holes lie in the grid above or span the flat emission surface of the cathode. Such a tube is needed no usual shadow mask. However, as in the control grid, the three holes in the first anode would be separated controlled.

Patent claims:

3 09 8 2 2/0923

-Ul-

Claims (1)

PATENTAHS PRO CHE l.yMulti-beam cathode ray tube eur production of visible images without a shadow mask, -4ennseiehnet duroh a 01a »- piston with a shark part (16) and a front panel part (17), which is a fluorescent screen surface made of several elongated, parallel, vertically spaced strips (19) comprises, which span the screen surface along essentially horizontal deflecting channels and are arranged successively at a vertical distance across the screen surface, a single Rlektronenstrahlereugungssyetem (24) in the neck part (16) for the extraction of at least three a vertical abotand having electron beams, which in a substantially vertical The electron beam generation system (24) has a former cathode (27) made of a lead part (32,33) directed towards the lampshade surface with a channel part protruding onto the tieuohtechirmflache and forming a flat emission plate (3 ¹ IB) elongated in the vertical direction, di e spans the cathode (27) vertically and to which a cover of electron emission material is applied, which is thermally activated in order to emit electrons only to form the electron beams *, a control grid element (28) and a first anode element (29) which is spaced apart are arranged parallel to the plane of the emission plate (34B) and each have three holes (38R, 38B, 38Q; 42R, 42B, 420), with a hole for each of the three respective electron beams for controlling and shaping the electrons emitted by the cathode (27) into three spaced-apart beams, and with the holes in the ultimate element (28) and the first anode element (29) for each electron beam in the axial direction along the Strjethlaohse - 42 309822/0923 1 «arranged essentially perpendicular to the emission plate (3 * B) • ind and um dl · ·· Where does electrically conductive material come from (39) arranged 1st, facilities but supply of selected • electrical potential · on · conductive · material (39) for the individual holes and acceleration anode elements (30) si for acceleration of the electrons in the rays in Riamtwvj on the Leuohtstoffeohlrmfllehe " 2. Multi-beam cathode ray tube according to Anepruoh 1, dadureh gekenniehnet that the channel part has a substantially truncated Has V-shaped transverse sonicity. 3 · Multi-beam cathode tube naoh Anepruoh 1, dadureh It is known that the cathode (27) is connected to one another Bieehtelle (32 * 33) includes, the jewella »white Nearly on the outside protruding truncated V-shaped canal parts have, the susamawn a in vertical direction nit spacing arranged eeo-side channel is essentially honeycomb-shaped Form a figure in the cross section, the one in front plane Ρΐβοηβ (34B) forms, which represents the emission plate and each with the IAohern in the control grid (28) and the anode element (29) is aligned, where dl «Kanftl · Wrap around helical wires along their length. 4 multi-beam cathode ray tube according to one of claims 1 to 3, because it is identified because the flat emission plate (34B) has a width of about 3 mm in a vertical plane perpendicular, because the holes (38R, 38B ₉ 380) in the control grid (28) have a diameter of about 3/4 mm and that the holes (42R _a 42B * 420) in the first anode (29) have a diameter of about 1 mm. 5 · Mshrstrahl-Cathode Raytube naoh Anepruoh 1, kennseiehnot - 43 - 309822/0923 ■ - 45 - by two heating coils (35) in the channel part behind the emission plate (34B), the turns of which are pushed into one another are »to intensify healing near the central axis of the eniseion plate (34B). 6. Multi-beam cathode ray tube according to claim 3 »thereby characterized in that the heating wire encloses two heating coils in the channel part behind the emission plate (34B), whose turns are pushed into one another in such a way that the rice effect is adjacent to the central axis of the emission plate is reinforced. 7 «multi-beam cathode ray tube according to claim 3, characterized characterized in that the heating wire encloses two heating coils (35) in the channel part which are pushed into one another, in order to intensify the heating effect in the vicinity of the central axis of the emission plate (34b) and that with the opposite Winding direction are wound, 8, multi-beam · * cathode ray tube according to one of the preceding Claims, characterized in that the control grid (28) is formed from a non-conductive substrate plate (36) is the one passing through and each with the emission plate (34B) has aligned holes (38R, 3θΒ, 38α) and the with a rearward-facing recess in the central region of the substrate (36) for receiving the cathode channel part is provided in partially inserted relationship that the holes open towards the recess and that the Control grid (28) has electrically conductive material which lines the holes and which is replaced by conductor strips (39) with ribbon connections for supplying selected potentials is connected to the lining material for separately controlling the electron beams. - 44 3098 22/0923 9 · Itohrstrahl-Kathodenetrahiröhre naoh claims 2 or 3 »da * characterized in that the control grid (28) is formed from a non-conductive substrate plate (36), the meanwhile BdLt of the emisalone plate (31B) aligned holes (38R, 38b, 38a) and those with a rearward-facing recess with a truncated V-shaped cross-section In the Mlttelbereioh of the substrate eur inclusion of the cathode channel parts β is provided in partially inserted relation * that see the holes open in the recess and that the control grid (28) has electrically conductive material »that lines the holes and the duroh conductor strip (39) with edge connections for the supply of selected potentials is connected to the clothing material with separate control of the electron beams. 10. Multi-beam cathode ray tube according to claim $, characterized in that the recess in the control grid (28) has a flat base wall which is opposite the emission plate (34B) and has a slightly smaller width than the emission plate, in such a way that that a contact of the edges of the emission plate (34B) with the side winds of the recess is achieved if the emission plate has a small distance near the rear from the base wall of the recess and this distance is maintained. 11. Multi-beam cathode ray tube according to one of the preceding claims, characterized in that the control grid (28) and the first anode element (29) each have a non-conductive substrate plate (36, 42) with a metallic lining Include openings (38R, 38B, 380; 42R, 42B, 420), which form the holes and that a metallic screen (40, 43) extends around the periphery of the substrates (36, 42) of the Control grid (28) extends rearwardly and from the first anode (29) near the front to reduce sweeter noise and radiation effects. 309822/0923 -45- 12 · Multi-beam cathode ray tube according to one of the previous 4PtMKi6tn Claims, characterized by two above and maintenance » of the shark parts (16) arranged magnets (61a, 64b) cur deflection of the upper and lower beam of the three electron beams on converging non-curling orbits to generate points on the LeuohtBohirmflache, which one be closer to the center of the three beams than the distance between the beams in the area the control grid (28), 13. Multi-beam cathode ray tube according to one of the preceding claims for generating three-color images for a color television receiver and the like, characterized in that the bands (19) each have a set of three elongated strips (2OR, 20B ₉ 200) of phosphors with a first, second and the third color effect, since the longitudinal axes of the strips extend essentially horizontally and the individual fluorescent strips are separated in the vertical direction by a narrow safety strip between each fluorescent strip and that the three vertically spaced electron beams each hit the three fluorescent strips (2OR, 2OB, 200) in each band (19) are directed in a preselected order and are deflected along their associated strips of fluorescent material in each band to produce a color image on the screen surface. 14. Multi-beam cathode ray tube according to claim 13, characterized characterized in that the fluorescent strips have a height of about 0.25 mm (0.01 inch) and that the security strip separating the fluorescent strips is a rest of approximately 0.025 mm (0.001 inches). 15 * Multi-beam cathode ray tube similar to one of the previous ones Claims to generate visible images and with a 309822/0923 " ^ή6 ~ BAD OBIGINAL Glass bulb, which has a neck part and a front plate part, characterized by the fact that the front plate part (112) has a number of fluorescent screens (11 * A, 114B, HiC, 12HA to 12 * F) arranged in a selected pattern over the flies of the front panel part, since a single electron beam evaluation system (115, 125) is provided in the holding part in order to generate a multiplicity of electron beams. the number of electron beams being at least equal to the number of light beams, since the electron beam suction system (115, 125) has an identical cathode (127) with a flat surface part (135B) _{9 of} the cathode in a transverse plane and is directed at the screens; and with a top suction of electron emission material on the flat surface part, which is thermally activated to end electrons for the formation of electron beams from rue, a stator grid (128) and a first anode element (129), which divides the plane of the flat surface at a distance and parallel to each other ( 135B) and which each widen a hole for each of the respective electron beams for the control and shaping of the electrons emitted by the cathode into the beams, since the holes in the control grid (128) and the first anode element (129) for each electron beam are each in Axial alignment along an aobte perpendicular to the surface part (135B) and that acceleration anode elements (132) are provided for accelerating the electrons in the beam towards the phosphor screens, with the cathode (127), the grid (128) and the anode elements (129 * 132) being rigidly supported in a one-piece arrangement. 16. Multi-beam cathode blasting tube according to claim 15 »thereby recognized that the cathode (127) is a sheet metal part (135. 136) which is directed onto the control grid (128) - »T 30 9822/0923 and sue! truncated V-shaped «has duct parts which in Jump towards the front grille and two with vertically spaced flat end faces which form the two flat surface parts (135B) and which are aligned with the holes in the control grid (128) and the anode elements (129,132), respectively, wherein the canal parts hay wires (12TF) along their length surround. IT · multi-beam cathode ray tube according to claim 15 »thereby characterized in that the cathode (12T) comprises two interconnected sheet metal parts (135 * 136), each «white have outwardly projecting truncated V-shaped channel parts, which together are two vertically spaced Six-sided channels with a substantially honeycomb shape in the side view define the flat end faces have that white from the flat surface parts (135B) and are aligned with the holes in the control grid (128) and the anode elements (129,132), respectively, the channels surrounding hot wires (12TF) along their entire length. 18. Multi-beam cathode ray tube according to one of claims 15, 16, IT or 18, characterized in that the control grid (128) is formed from a rectangular non-conductive substrate plate with holes therethrough, each with the planar surface portion (135B) are aligned and that the control grid (128) comprises electrically conductive material, that lines the holes and over conductor strips with edge connectors for the supply of selected potentials connected to the cladding material with separate control of the electron beams. -HB- 309822/0923 19. Multi-beam cathode ray tube according to claim 18, characterized It is recognized that there is a tubular, cylindrical focusing anode (131,133) is provided that the acceleration anode element (132, 130) a tubular cylinder (130) with one of the tubular focusing anode (131) corresponding Includes cross-section, wherein the two tubular elements (130,131) in the axial direction with each other are aligned, and there are transverse rectangular ones Mounting plates (132, 133) parallel to the first anode (129) and spaced therefrom and the tubular cylinder (130) of the acceleration anode and the tubular cylindrical focusing anode (131) in axially aligned Hold relationship and that a plurality of elongated frame members (134,134A) common brackets for the grid (128), the first anode (129) and the support plates (132,133). 309822/0923