DE1514094A1 - Multi-beam electron gun - Google Patents

Description

DIPL. ING. H. MARSCH

PATENT ADVOCATE
4 DÜSSELDORF

LINDEMANNSTR. 31 -TEL. 68224Ö

July 23, 1965

Dr. Expl.

description to the patent application

from Kentucky Electronics, Ine ", 2208 West Second Street,

Owensboro, Kentucky / U.S.A.

concerning?
"Multi-beam electron gun"

The invention relates to electron guns or electron gun systems used in cathode ray tubes and particularly to multiple gun assemblies such as those used in color television tubes.

In the field of cathode ray tubes, it has become common practice to use three for tubes in color television tubes Single electron guns produce certain electron gun assemblies to use that then in a battery or in a row, held together by brackets or fastening rods, to be ordered. Such types of production favor a high reject rate because of the large number of Possibilities of poor alignment of the individual elements or of the corresponding electron guns and because of the extensive measures that are required to achieve an accurate setting maintain.

In color television tubes with multiple electron guns is the balance between the electron guns !!

^: - 2 "·

909838/0478

Ί5Η094

decisive for producing the desired color, and the three electron guns or electron guns must be carefully matched to one another, which is the case with single electron guns does not have to be observed so carefully in ordinary tubes. Relatively minor shifts between electrodes in different electron guns causing a shift or deviation of the parts in a paint tube assembly result in a ηίο. '. ΐ color electron gun to be used even there: -ui, if the individual electron guns on a tube with a single electron gun were acceptable.

Thus, it is an object of the invention to provide an improved multi-beam electron gun.

Another object of the invention is to improve the uniformity between beams from multi-beam electron guns to maintain "

These goals are overcoming the previously

mentioned difficulties according to the invention by creating a multi-beam electron gun, in which the Accuracy of the alignment of all beams during assembly of the various electrodes and electron guns in question is secured. This is effected or achieved by integral, i.e. one-piece, insulated electrode holders, which are the corresponding electrodes for the various electron guns within a set of Hold openings in such a way that the electrodes for the various electron guns in one through the Holder formed matrix are arranged in a certain mutual position.

COPY 909838/0478

BATH ORIGINAL

Embodiment "examples of the invention are in the drawing shown. Irs this shows:

Pig = 1 a multi-beam electron gun after the

Invention in a view, partly in section,

2 shows a plan view of an insulated electrode holder according to the invention and

Pig »3 shows a view of a further embodiment '■■. for an electron gun according to the invention.

On the multi-beam electron gun shown in Fig. 1, for the sake of better illustration, only two of three electron guns corresponding to the beam paths 8 and 9 are shown as well as only a single fastening rod 10, but should of course correspond to that from the top view of the Seheibe 41 in Pig, 2 to recognizing patterns be arranged three electron guns symmetrically ₆ in essence, the three beams 7, 8 and 9 under the influence of the electrode 12 to form in all three beams, along with the orientation of the electron guns to beiträgt5 a combined three-beam array converge .the whole in a color television tube, for example, "can be deflected by the shadow mask type j" Each assembly of electron guns comprises a series of cylindrical electrodes, such as 14, 15, ₅ 16 and 17 which form one to four in a grid electron gun. According to the invention, these electrodes are held in openings 18, 19s, 20 of a series of matrix holders _s, such as 11, to thereby create a fixed spaced arrangement with precise alignment for the individual beams to converge. Therefore, each cup electrode is held by a corresponding matrix holder in fixed mutual spacing position and inclination such that all the rays in all assemblies are then uniformly even if dil ^e aui3 separate electrode parts are constructed.

909838/0478

15U094

Note the difference in the hole spacing between the matrix electrode holders 11, 21, 31 and 41, which form the convergence arrangement of the electron guns by including the respective electrodes 14, 15, 16, 17, etc., is required. The matrix holders 11 etc. may be attached to a set of glass rods by a series of notched tongues 22, which are provided to achieve the longitudinal spacing along the beam lengths 7, 8, 9.

Each electrode can have a metal cup with a beam passage opening which is inserted into recesses 18, etc. is held such that on each electron gun the appropriate electrical connections to the electrodes, such as desired, can be produced; the disks can be used to separate the electron guns or insulators Be a conductor when working on all three electron guns with a common electrode potential.

If very tight spacing tolerances are required, can be a ceramic disk 21 with matching recesses on opposite sides for holding electrodes 14 and 15 are used at a mutual distance from each other. In other cases, the mounting matrix disc 41 in FIG Central position on an electrode 17 with sufficient spacing accuracy be welded in the usual way to ensure the required uniformity between the beams «

While mounting in glass rods 10 is a conventional technique that is within the limits of what is required Tolerance for the lengthways clearances can be made a more careful control as shown in the embodiment in FIG. 3 is achieved. This is achieved by keeping your distance

909838/0478

■ '. ■ ■ "ν- 5 -

the ceramic cylinder 21 ', 11', 31 * and 41 'from each other by means of metallic hinge 50 attached to it by conventional methods
are soldered on ₀ Each ring can, if required, be stored in a corresponding recess in pairs in order to ensure a very precise alignment that does not change from cannon to cannon «

Patent claims:

90 98 3 8/0 A 7 8 ORIGINAL INSPECTED

Claims (12)

P at e nt claims Multi-beam electron gun for a cathode ray tube, in particular color television tube, with at least three electrons, characterized by a whole-forming electrode part (1.1,12, H, 15,16,17 _f 21,31,41) with a plurality of spaced apart attached to it Openings. (18,19,20) for precisely defining a variety of beam paths through the cannon. 2) electron gun according to claim 1, characterized in that that the electrode part (11,12,14, -15,16,17, .21,31, -41) in Form of a plurality of spaced apart la "T" T * FL rl ι P ¹ KI & T * * 7 (^ 7] £ f f ^ YI rf (^ Ύ * 11 Yl f ^ / Cup-shaped dilatation beads & accelerating electrodes (14,15,16,17) is designed with openings in it «, 3) electron gun according to claim 1, characterized in that that the electrode part (11,12, H, 15 »16,17,21,31 | 41) has a insulating disk (11,21,31 or 41) provided with openings, in which metallic electrode parts (14,15,16,17) are used, 4) multi-beam electron gun according to claim 1, characterized by a row of a whole forming insulated electrode holder (11, .21,31,41) with a large number of spaced Openings (18,19,20) with electrode inserts (14,15,16,17) mounted in the openings for forming and directing a beam through each opening and through means for attaching a plurality of such holders (11,21,31,41) at a mutual distance for the formation of a large number of beam paths through those arranged at a distance from one another . Neth openings * 90 983 8 / 0A78 "7- SAf) OfIIGtNAL 15H09A 5) electron gun according to claim 4, characterized in that that the means for fastening the holder (11,21,51,41) attached at a distance from each other between adjacent holders Abutments (10) are «, 6) electron gun according to claim 4, characterized in that that the means for fastening the holder (11,21,31,41) comprise a set of insulating rods (10) and that the holders (11,21,31,41) are provided with notched tongues (22) are in mutual engagement with the rods (10). 7) Electron gun according to one of the preceding claims for a cathode ray tube with a set of at least three electrodes provided with openings for the formation and directing of corresponding cathode rays, characterized by a guide part (11,21,31,41 or “11 ', 2I) which forms a whole ¹ , 31 ', 41') with a multitude of openings (18,19,20) for receiving the electrodes ^ 14,15 »16,17) at a mutual distance and their alignment for the formation of a multitude of separate beams of predetermined correlation and by - Means for creating a convergence, which serve to the A plurality of beams for line scanning by a to bring a common source of distraction into the right position » 8) electron gun according to any one of the preceding claims, characterized by a plurality of forming a whole Guide devices, each of which has an insulating disk provided with openings (11, 21, 31, 41 or 11 ·, 21 », 31 ', 41 ·) comprises, in the openings (18,19,20) a plurality of electrodes (14,15,16,17) are attached, each one form separate electron beam, and by means of Fixing the guide means at a mutual distance such that the separate beams converge. 909836/0478 15U094 9) electron gun according to one of the preceding claims, characterized by a series of staggered a whole forming electrode arrangements (14 »1.5 * 16,17)» which each form a path for a multitude of rays and are mutually interrelated so that the rays when in a subdivided radiator group are ordered, converge, and by means for holding the arrays in an ordered radiator group in mutual distance " 10) electron gun according to one of the preceding claims, characterized in that a battery of at least three electron guns at least one group of electrodes (14,15,16,17) correspondingly provided with openings for the separate electron gun in an electrode holder (10, 11, 21, 31, 41 or 50, 11 ', 21', 31 ', 41') for keeping the electrodes (14,15,16,17) spaced apart and the alignment of the beam paths. 11) electron gun according to one of the preceding claims, characterized by an electrode holder (10,11,21,31,41) with an insulating washer (11,21,31 or 41 with a Series of aligned indentations on one side of the disc, with a series of corresponding aligned indentations co indentations on the opposite side of the disc, with ^ Means for connecting the recesses through the disc ° * between the corresponding indentations and with into the Electrodes (14, 15, 16 and 17) inserted into the wells _o Manufacture and align a multitude of beams in the ^ * corresponding corresponding wells of the named oo rows. 12) Electron gun according to one of the preceding claims, characterized by a matrix (50, 11 ·, 21 ', 31 ·, 41') for receiving and positioning the electrodes (14,15,16,17) with a ceramic shape designed in this way is to accommodate the corresponding electrodes (14 # 15, 16, 17) of various electron guns in shaped receptacles that hold and align the electrodes at a distance. BATH ORIGINAL