DE1300962B - Deflection system for color television picture tubes with several electron beams - Google Patents

Description

1 2

The invention relates to multi-beam cathodes in the complexity of television receivers

the beam tubes, as reflected as picture tubes in color remote control.

visual receivers are used, and the particular aim of the invention is therefore a simplified one

ren on a simplified deflection system for such a deflection system for picture tubes of interest here-

Cathode ray tubes. 5 the kind that do not have corrective signals for compliance

Until now, cathode ray tubes having three electron of the dynamic convergence are needed more, have been used tronenstrahlen in which the invention this object is achieved in accordance with electron beam generators were arranged so that d _a ß the windings for the vertical beam deflection they were the vertices of an equilateral triangle. have further windings through which a flux-Furthermore, such three-beam cathode ray components can be generated which have become known on the vertical tubes, in which the electron deflection field is perpendicular, that the windings for beam generators are adjacent to one another in one plane - the horizontal Deflection more turns are arranged. Produced in conventional shadow mask tubes or in ways by which a flux component tubes can postacceleration _s j t, which is arranged on the horizontal deflection field at right angles to both types tronenstrahlerzeuger 15 _ste ht the electron, and that are of the perpendicular. Flux components of the magnetic field on the Elek-The deflection of such tubes with which tronenstrahlen exerted forces are so large that the electron beams deflected and the convergence can be generated by the electron scanning were placed genz, were previously very complicated _ma n _s points parallel to each other are, however, and costly. The previously used almost anywhere _a oi _n different size. The solution, therefore, was to use a _shadow mask tube.This size correction can easily be achieved with three electron guns, by letting the sawtooth-shaped ones arranged as an equilateral triangle pass through and deflection currents through a pre-deflection system also using a massive deflection yoke. In this way the three can be brought into line again around which a large amount of copper wire was wound in a grid without cosine distribution, in order to create a deflection field within the yoke that is necessary for the dynamic convergence of complicated correction signals was as linear as possible. Such a linear _m i following to but the invention and advantageous deflection field causes parabolic error and consolidated developments in conjunction with the drawings vergence in the resulting grids produced. 30 will be described in detail. It was therefore customary with a pre-deflection to FIG. 1 is a plan view of a multi-beam work in order to secure the required dynamic converging cathode ray tube with a simplified deviation of the various electron beams according to the invention; to deliver. Achieving the dynamic conversion; Fig. 2 is a side view of the cathode ray beam, but makes the generation of complex correction tube from Fig. 1;

required for the parabolic errors, Fig. 3 shows the parabolic errors of the previous

the deflection systems according to amplitude and phase with the deflectors;

flow in the deflection yoke in precise relation. Fig. 4 shows schematically the horizontal deflection positions have to. The circuits for generating these windings according to the invention; complex correction signals are also very granular. 40 Fig. 5 shows schematically the vertical deflections and expensive. windings according to the invention;

It is also known that the convergence F i g. 6 shows a preferred turn distribution

Difficulties with such multi-beam cathode for the windings according to FIGS. 4 and 5;

the ray tubes occur by using F i g. 7 is a graph showing

of deflection yokes to a certain extent, like the turns of the vertical deflection winding

times that generate nonlinear deflection fields. from Fig. 6 are distributed;

For example, U.S. Patent F i g. 8 is a diagram showing

2925 542 a deflection yoke for a multi-beam like the turns of the horizontal deflection winding

Cathode ray tube with side by side from F i g. 6 are distributed;

Electron guns have been described, the 50 F i g. 9 shows the errors in grid size that

provided with horizontal and vertical windings caused by the deflection yoke according to FIG

was. The turns in the horizontal and vertical are:

Cal windings were distributed identically here. Fig. 10 is a schematic section along the

By distributing the windings on the line AA from FIG. 1, the pre-deflection system

Deflection yoke, which is used in this USA patent to correct the vertical size errors

is written, the deflection at cathode F i g. 9 represents;

Adjacent electron beam tubes - Fig. 11 is a schematic section along the

radiate simplified, since a dynamic convergence line BB from FIG. 1, the pre-deflection system

in a direction perpendicular to the plane in which to correct the horizontal size error after

Electron beams passed, no longer required 60 F i g. 4 represents;

was. F i g. 12 schematically shows a circuit diagram for a

Despite the improvements that the aforementioned deflection circuit of a color television receiver, in

United States patent, it was still necessary to use a deflection system according to the invention

there will be a dynamic convergence in that plane.

to care in which the electron beams passed. 65 I _n the F i g. 1 and 2 is simplified a multi-It measures were therefore necessary to the beam cathode ray tube shown, which is characterized with 1 dynamic convergence is at least still in one and to achieve the simplified deflection system according to direction, which is used in the costs and the invention . The cathode ray tube

has a neck 3 and a piston part 5 which is closed by a front disk 7. the The inner surface of the front pane 7 is covered with colored dots (not shown) in order to produce colored television pictures to be able to generate. Several electron beam generators 9, 11 and 13 are arranged in the tube neck 3, the electron beams 15, 17 and 19 can generate. The electron guns 9, 11 and 13 lie next to each other on one level. The axes of the electron guns 9 and 13 are opposite the axis of the electron gun 11 inclined by a small angle that the Electron beams 15, 17 and 19 converge statically approximately in the center of the front panel 7. The electron gun 9, 11 and 13 can be used to stimulate blue, green and red colored points with which the front plate 7 is covered. For the sake of simplicity, the three electron guns should therefore be classified as "blue", "green" and as "Red" electron guns are called, ao The three electron beams 15, 17 and 19 are shown as dotted, dashed and dash-dotted lines Lines shown.

In order to selectively stimulate the blue, green and red color points on the front panel 7 »5 can, the three electron beams 15, 17 and 19 through openings in a shadow mask 21 on shot the screen. This is known.

According to the invention, the electron beams 15, 17 and 19 are deflected by a deflection yoke to to cause three superimposed grids of different colors on the front panel 7. That Deflection yoke is shown schematically at 23.

The yoke 23 is provided with horizontal and vertical deflection windings, the turns of which are distributed so that within the yoke an optimally non-uniform magnetic field is created around the parabolic To cancel out errors associated with uniform magnetic deflection fields. if if the deflection yoke 23 is designed according to the invention, complex correction signals for the dynamic Convergence no longer necessary. All you have to do is adjust the grid to the right size correct those caused by the blue and red electron guns 9 and 13 will. For the static convergence and the size correction in the vertical direction is therefore a unit 25 is provided which has a correction winding and between the electron guns 9, 11 and 13 and the deflection yoke 23 is arranged around the tube neck. One unity 27, on the other hand, serves to correct the static convergence and the grid size in the horizontal direction. This unit 27 is also provided with a correction winding and is between the unit 25 and the deflection yoke 23 arranged around the tube neck.

As in FIG. 1 is shown the winding of the unit 25 making the corrections in vertical Direction concerned, through line 29 to one end of the vertical deflection winding of the Yoke 23 connected in series. From the other end of the vertical deflection winding of the yoke 23 leads a line 31 to the vertical deflection stage 33, so that the sawtooth-shaped deflection currents from the Deflection stage 33 first through the vertical deflection winding of the yoke 23, then to the correction winding the unit 25 for the convergence and size corrections in the vertical direction and from there flow off to the mass.

In the same way is the correction winding of the unit 27 for the convergence and size correction connected in the horizontal direction by the line 35 to the horizontal deflection winding of the yoke 23, from which a line 37 leads to the output stage 39 for the horizontal deflection. Hence the sawtooth-shaped deflection current from the output stage 39 also successively through the horizontal deflection winding of the yoke 23 and through the correction winding of the unit 27.

In FIG. 2, parts of the electron guns 9 and 11 have been broken away in order to be able to show all three electron guns 9, 11 and 13 better. In addition, for the sake of simplicity, the electrical connections that are shown in FIG. 1 are shown.

The mode of operation of the system according to FIGS. 1 and 2 is as follows: The deflection yoke 23 is generated an optimally non-uniform deflection field that corrects parabolic deflection fields by itself. Everyone who three electron beams 15, 17 and 19 therefore draws a grid on the luminescent screen, all three of which run parallel to one another and extend over the entire luminescent screen on the front pane 7 extend. As I said, these three grids are parallel. They were only slightly different in hers Size. Therefore, the same sawtooth-shaped deflection currents that are supplied to the deflection yoke 23 are applied are, then the correction windings of the units 25 and 27 for the convergence and Size corrections are made in the vertical and horizontal directions so that the three grid grids are over over the entire screen.

In order to better understand the invention it is useful to discuss the parabolic errors, caused by the known deflection yokes with uniform deflection fields. In the F i g. 3 therefore shows a view of a color television tube from the front, on its luminescent screen Electron beams record a grid, which are deflected with a known deflection yoke, the generates a uniform deflection field. It can be seen that even when the electron beam 17 is off the "green" electron beam generator 11 generates a number of straight, perpendicular lines 41, those recorded by the electron beams 15 and 19 from the electron guns 9 and 13 Lines 43 and 45 diverge due to the parabolic errors. The beam 15 from the blue electron gun no longer draws vertical straight lines, but parabolic ones Lines 45, and it can be seen that these parabolic errors become larger and larger towards the edge of the tube will. The electron beam 19 from the “red” electron beam generator 13 also draws Put straight vertical lines up parabolic lines 43, and here too take the parabolic ones Error towards the edge of the tube. How the electron beams intersect, so that the parabolic Error from Fig. 3 arise is shown in FIG. 1 using the electron beams 15 ', 17' and 19 ' as well as 15 ", 17" and 19 ".

It is known that such parabolic errors as shown in FIG. 3 are shown in the previous Distraction systems were inevitable. The reason for this is in the tube geometry as well as in the

Interaction between the axial component that the main field is indicated by the arrows 69 and 71 of the deflection field and the deflected electrons is shown, together with the component of to seek rays. Correction winding that opposes the main field

So far this serious split could be directed during the negative half-wave of the The sawtooth 65 exerted by the individual electron beams exerts a force on the electron beams called grid lines only through the use shown by arrow 85. the Complicated pre-deflection systems are corrected, electron beams are thereby removed from the character complex and difficult to generate grain level deflected out. The field components correction signals had to be supplied. This each corrective winding that is on the main field Difficulties of the prior art io standing vertically, exercise on the electron beams are, however, according to the invention by using a force in the vertical direction when the tion of a deflection yoke overcome, in which an electron beam in the vicinity of the correction Wickoptimales non-uniform deflection field is generated, lungs run.

by which the parabolic errors from FIG. 3 of In the F i g. 5 is a vertical deflection coil

fall away. The three electron beams draw 15 with two connections 86 and 87 shown. the therefore on the screen three linear grids, vertical deflection winding consists of the main the are parallel to each other at all points. windings 89 and 91 and from the correction windings

If you have a practically uniform abutment 93, 95, 97 and 99. These whole windings steering field vertical flux components are added, if you start from the connection 86, in following or superimposed, so you can, as you found ao, connected in series: Winding has to generate a deflection field in which the parabo- 99, winding 97, winding 93, winding 95, winding errors from Fig. 3 are corrected by themselves. lung89 and winding91.

4 and 5 it is shown schematically how the flux of the windings 89 and 91 is additive,

the deflection fields generated by the horizontal and vertical deflection windings so that a practically uniform main deflection field is perpendicular 25. The magnetic flux that can be added by the corrective flux components. In each of the windings 93, 95 and 97, Fig. 4 shows a ferrite core 47 which has a horizontal deflection winding wound perpendicularly on the main torus as one component. The ferrite core 47 can be added in the form of a truncated cone from the main field,
be educated. 30 For example, if you have a sawtooth

The connections of the horizontal deflection winding deflection voltage 101 between the terminations 86 have been designated 49 and 51. The deflection and 87 sets so that during the negative half-wave winding consists of two partial windings 53 and 55 of this sawtooth voltage, the current flows in the direction of and from four correction windings 57, 59, 61 and arrow 103 through the deflection winding, generate 63. If you go From the terminal 51, one sees 35 the winding 89 and 91 a main field, the direction of which the various partial windings are shown in the following direction by the arrows 105 and 107. Sequence are connected in series: Winding The correction windings 93, 95, 97 and 99 generate 61, winding 63, winding 57, winding 59, but winding fields whose direction is indicated by the arrows 109, development 55 and winding 53. In this way, add 111, 113 and 115 is shown.
The magnetic fluxes of the two partial windings 53 40 are similar to those of the horizontal Ab and 55, so that a practically uniform deflecting winding from FIG. 4 can be seen that the magnetic field is created. The magnetic flux, which is generated by the four flux of each correction winding a component correction windings 57, 59, 61 and 63, which is perpendicular to the main field, has a component which is perpendicular to the main field and a component which is the main field runs, and also added a grain 45. For the magnetic flux of the correction component, which is opposite to the main field. winding 93, this is shown by arrows 117 and 119. Since the corrective windings have a lower winding. The main field, which is represented by the arrows 105 as the main part windings, and 107, together with the field, the magnetic flux of the correction windings only exerts components of the correction winding, which then add to the significant effect on the main electron field during the negative radiate when the electron beams pass directly on the half-wave of the sawtooth 101 on the electron end correction windings. radiate a force indicated by arrow 121

For example, if a sawtooth-shaped image is shown. Here, too, the rays are again steering voltage 65 is applied to the terminal 51, deflected out of the plane of the drawing. the so that the current in the deflection winding during 55 correction component that drops on the main field negative half-wave of the sawtooth is in the right and for example by the arrow 117 Direction of arrow 67 flows, generating the winding is shown, generating one in the horizontal direction parts 53 and 55 have a practically uniform main-acting corrective force, which, however, is only close to field, the direction of which is indicated by arrows 69 and 71, the correction windings have a noticeable effect is shown. The corrective windings 57, 59, 61 60 exerts.

and 63 generate fields whose directions are horizontal and according to the invention

represented by arrows 73, 75, 77 and 79. vertical deflection windings and their associated It can be seen that each of the correction windings 57, 59, correction windings as shown in FIGS. 4 and 5 61 and 63 includes a component shown on Figure 1 in such a context Main field is vertical, as well as another grain 65 with each other that the correction forces of the correction components, which is opposite to the main field. Generate three linear grids for windings that are the correction winding 57 is this fact practically on the entire luminescent screen of the represented by arrows 81 and 83. You can see the cathode ray tube cover.

for the vertical deflection winding and fulfill the task of the connections 86 and 87 from FIG. 5. In a very similar manner, a connection 149 is connected via a line 151 to the turn 133 of the third winding 5, while a line 155 leads from a connection 153 to the turn 137 of the fourth winding. The connections 149 and 153 therefore represent the inputs for the horizontal deflection winding and fulfill the same task as the connections 1 ikl i

According to a preferred embodiment of the
Invention are the windings shown in FIGS. 4th
and 5 are shown separately, on a single one
Core united so that there is a winding distribution
which is shown in FIG. 6. In the embodiment according to FIG. 6 are the vertical and the
horizontal deflection windings each with their
associated correction windings have been combined, which are shown in FIGS. 4 and 5 have been shown. G

The horizontal winding 53 of FIG. 4 is therefore io 49 and 51 of the winding from FIG. 4th
with the correction windings 57 and 59 together - The windings 125, 129, 135 and 139 are through

while the horizontal winding 55 lines 157, 159, 161 and 163 are connected to each other in parallel with the correction windings 61 and 63.

has been caught. Similarly, the vertical one can see that the turn distributions for the

Deflection winding 89 from FIG. 5 have been combined with the correction 15 horizontal and vertical deflection windings 93 and 95 while being different. This represents an essential feature of the vertical deflection winding 91 and the correction times of the invention. Each of these turn distribution windings 97 and 99 have been combined. In addition, the horizontal and vertical lungs according to the state of the art are considerable, the deflection windings have been combined so that an ao distribution of windings directed towards a deflection field which is as uniform as possible results which was slightly on one. According to a preferred embodiment

According to the invention, turn distributions for the vertical and horizontal deflection windings are used, which generate an optimally non-uniform deflection field and are shown graphically in FIGS. 7th and 8 are shown.

In FIG. 7 is the turns distribution for the vertical deflection winding of FIG. 6 graphically in

jg g gg plotted on a normalized scale. On the

which rest on the inner surface of the core. One 30 F-axis of FIG. 7 is the percentage of the total sees that these turns the electron beams number of turns for the vertical deflection 15, 17 and 19 come closest and therefore the ikl i i i

exert the greatest influence on the electron beams.

The winding distribution from FIG. 6 can easily be g g

through the use of four separate winding 35 grows. This curve therefore represents the place of a gene to be wrapped one at a time. For manufacturing each turn within the quadrant. When position of the winding 124, which is shown by empty screech for example, for the vertical deflection in one example, in the winter each quadrant 41 turns used Werdung start 125 and the wire contrary to the As shown in FIG. 6, the winding must continue clockwise up to the turn 127 . 40 50% of these windings within one quadrant - the second winding 128, which are due to the crossover angle Φ of 35 °. Accordingly, the th screeching should be shown at the 20.5. Start winding at a quadrant angle of 35 ° winding 129 and be arranged counter-clockwise. Wind the distribution of the turns clockwise up to winding 131 . the vertical deflection winding in the first quadrant

These two windings then provide the perpendicular 45 ^st i is a mirror image of the distribution in the second deflection windings Quarechten dranten together with the Korrekturwick-.
lungs shown in FIG. 5 are shown.

Furthermore, one can start with the third winding 132, which is represented by the halved screeching, at the winding 133 and wind the winding counterclockwise up to the winding 135 . The fourth winding 136 is represented by the full screeching. You can start this winding at turn 137 and then turn it counterclockwise up to turn 139 55: wind. As can be seen, these combined windings have gaps in some places that are from

gg g,
single core can be wound. In this way one can dispense with separate correction windings, while one achieves the same effects.

In FIG. 6, the entire turns have been wound as a torus onto a ferrite core 123 which is frustoconical. For the sake of simplicity, only those turns are shown

winding in the second quadrant of FIG. 6 plotted, while the Z-axis represents an angle Φ , the counterclockwise anäh Di ll ie dl

The curve from FIG. 7 can be represented by a Fourier series can be represented in the following form:

Λ sm (Φ) + B sm (3 Φ) + C sm (5 Φ)

+ D sin (7 Φ) + E sin (9 Φ) + FSm (Il ^)

+ G sin (13 Φ) + H sin (15 Φ). ..,

where the coefficients have the following values k

Windings are kept free, while in other places the windings necessarily lie one above the other.

The third and fourth windings represent the horizontal deflection winding along with the correction windings that shown in FIG. 4 are shown.

The turn 127 of the first winding is connected to a connection 141 via a line 143 , and a line 147 connects the turn 131 of the second winding to a connection 145. The connections 141 and 145 therefore provide the inputs

^ _ 97 99

C ⁼ 0.69, D = 3.48, E = - 0.25, ρ _ -q'sö '_ _ ''^ ~ ^u '^/:>' H = 0.62.

The F i g. 8 is a graph showing the distribution of horizontal deflection windings

909533/166

F i g. Figure 6 shows on a normalized scale. In the graphic representation of FIG. 8 is on the Y axis the percentage of the total number of horizontal deflection turns in the first quadrant of the Fig. 6 plotted, while the Y-axis represents an angle 0 that is counterclockwise grows within the quadrant. Where the individual turns have to sit is through the small circles through which the curve is drawn. Each of the small circles represents represents a single turn. Thus, the curve gives the location for each turn within the quadrant at. For example, if 31 horizontal deflection coils are used per quadrant, as shown in Figure 6, 50% of these turns should be within one quadrant angle 0 of 25 °. Accordingly, the 15.5. Twist at the quadrant angle of 25 ° to be ordered. The distribution of the horizontal turns in the fourth quadrant is a mirror image like this the distribution in the first quadrant.

The curve 8 can be represented by a Fourier series of the following form:

Y _n = S sin (0) + T sin (3 0) + U sin (5 0) ^a5

+ F sin (70) + W sin (9 0)
+ X sin (110) + Y sin (13 Θ) + Z sin (150),

where the coefficients can have the following values:

S = 105.62,

T = 7.51,

U = 1.51,

V = -1.65,

W = 0.68,

X = 2.42,

Y = 0.50,

Z = -0.61.

In some cases it happens that horizontal and vertical deflection windings are to be placed in the same place are. Then these turns are necessarily one above the other, as shown in FIG. 6th emerges.

A deflection yoke with the winding distribution from FIG. 6 manufactured in which the horizontal and vertical deflection windings were made of magnet wire. This yoke had a ferrite core that was frustoconical. The inner diameter of the core was at the beam entrance and on the beam exit side about 45.5 mm and about 71.3 mm. The outside diameters of the core were on the beam entry and exit side, respectively, about 58.2 mm and 79 mm. The end faces of the Ferrite cores were notched into the various turns in the right places have been inserted. A notched insert can also be used for this purpose. One such The deflection yoke resulted in an extraordinarily good, simplified deflection system for a color television tube of the type General Electric 11SP22.

How the required by the interaction of the main deflection fields and the correction fields Forces which are required to cancel the parabolic error can only very much difficult to describe, since these forces move from point to point within the field as also change over time.

How the corrective forces act on the electron beams, however, can be discussed on the basis of the vector diagram which is shown in the first quadrant of FIG. 6 is shown. Therefore, for example, when an electron beam travels in the direction as shown in FIG. 6, and located somewhere in the first quadrant, the vertical deflection field B _MV and the horizontal deflection field B _MH produce a resulting deflection field B _MR . Recall that the horizontal field changes with the line frequency and the vertical deflection field changes with the frame frequency. From the vector equation

it can be seen that the force which the main deflection fields exert on the electron beam can be represented by the vector F _M.

The field B _C v> caused by the vertical correction winding can be broken down ^{into a component Bcvm m in the} direction of the vertical deflection field and into a component B _CV q which is perpendicular to the main deflection field. The correction field B _{CH of} the horizontal correction _{winding can be} broken down into a component B _C hm ^{m in the} direction of the horizontal deflection field and in a direction B CH0 which runs perpendicular thereto. The resulting correction field is therefore represented by the vector B _CR . The correction fields exert a force F _c on the electron beam, which is combined with the forces exerted by the main deflection field F _M , so that a resulting force F _R arises. In this way, the necessary correction forces for an electron beam can be produced, which eliminate the parabolic deflection fields of the previously known deflection fields.

It should be noted that the vector diagram from FIG. 6 only shows the conditions for a very specific point in time, for a very specific point in the axial direction and only for a very specific location within the quadrant. The total corrective forces that act on each electron beam during its passage through the yoke are the line integral over the forces that prevail at each individual point along the electron path. These line integrals are different for electron beams 15, 17 and 19, since these electron beams pass through the yoke on different paths, as shown in FIG. 1 is shown.

It should be emphasized again that by using a deflection yoke according to the invention, such as it in Fig. 6 shows values for the line integrals of the forces on the corresponding electron beams which cancel out such parabolic errors as shown in FIG. 3 are shown. The split the lines drawn by the electron beams on the luminescent screen are therefore avoided, and linear grids are generated which are parallel in all points, as shown in FIG. 9 is shown.

As in Fig. 9, the use of the deflection yoke from FIG. 6 leads to three grids of different sizes, namely to a grid 165 which is produced by the green electron beam generator 11.

11 12

is called, continues to a grid 167, which is indicated by the arrows 197 from. The electron blue electron guns 9 are caused to radiate into the plane of the drawing, and onto a grid 169 which is deflected from the red, as shown. Likewise, the electron gun 13 can be caused by the spacing of the U-cores 179 and 187 from the inner ones. 9 shows these three grids as they are changed by 5 pole pieces 171 and 175 in order to set the field strength when looking at the television picture tube from the front.

represent. According to a further development of the invention, the blue grid is to be seen as a dotted line

Line shown, the red grid as a dash-dotted line now directs the sawtooth-shaped deflection currents

Line and the green grid as a dashed line. Size correction windings 184 and 192 supplied,

Since the three grids from FIG. 9 only in its io about a linear but time-variable cor-

Different size can be produced according to a further correction field for the electron beams 15 and 19.

formation of the invention linear correction signals to invoke one. That way, the blue and

Pre-deflection system are fed to these three the red grid created by the electron beams 15

To bring the grid size to coincide. It and 19 are caused in the vertical direction

it is therefore no longer necessary to set complex signals 15 in such a way that they match the green grid

to collapse in order to correct the parabolic errors.

turn around. Rather, one can for the size correction. In FIG. 11 is a section through the horizontal

the grid the sawtooth deflection currents valley correction unit from FIGS. 1 and 2 shown

use it yourself. represents. The electron beam 17 is of a cylindrical

In FIG. 10 is now surrounded by a section through the coraodic shield 199, during the

rectification unit for the static convergence and the electron beam 15 with two V-shaped

Size correction shown in the vertical direction, pole pieces 201 and the electron beam 19 with two

which is shown in FIG. Those parts which are provided in V-shaped pole pieces 203.

10 and in FIGS. 1 and 2 coincide, for each of the two electron beams 15 and

have been given the same reference numbers. »5 19 a U-core is provided, which is attached to the outside of the

Each of the two electron beams 15 and 19 goes into the immediate vicinity of the tube neck 3

through two pole pieces, which are arranged within the pole pieces 201 and 203. The U core

Tubular neck 3 are arranged. The electron beam 15 for the electron beam has two L-shaped ones

Beam 15 therefore emerges between a C-shaped core segments 205 and 207, between which a

curved pole piece 171 and a practically flat 30 cylindrical ferrite magnet 209 inserted rotatably

Pole piece 173 through it. The electron beam 19 is going is. On the L-shaped core segments 205 and 207

between a C-shaped pole piece 175 and a sitting correction windings 211 and 213. The one

practically flat pole piece 177 through it. The electrical connection of the correction winding 211 is loaded with 214

The electron beam 17 is not affected by the forces. The U-core for the electron beam 19

which flows the pole pieces on the electron beams 35 ^{has two} L-shaped core segments 215 and 217,

exercise. between which a cylindrical ferrite magnet 219

Two Ε-cores are inserted on the tube neck in such a way that they can be rotated. On the core segments 215 and

arranges that the two electron beams 15 and 19 217 are size correction windings 221 and 223

run close to these Ε cores. The Ε core put on. The core segments also show

for the electron beam 15, a U-core 179 has 40 depressions into which the magnets 209 and 219

and a central leg 181. Are used between. The connection of the winding 221 is

Leg 181 and the U-core 189 has been designated a cylindrical with 224.

drischer ferrite magnet 183 rotatably arranged. On the horizontal correction coils 211, 213, 223

the leg 181 is a winding 184 with connection and 221 are behind in the specified order.

Connections 185 and 186 are arranged, which 45 have been switched to one another.

Lent size correction caused in the vertical direction. The mode of operation of the horizontal convergence

The ferrite magnet 183 is diagonally polarized as it is and the correction unit of FIG. 11 is such that

is shown. He is in grooves in the U-core 179 by rotating the magnets 209 and 219 the

and the leg 181 arranged. Size and polarity of the static magnetic field

The core for the electron beam 19 is adjustable with a 50 that points to the electron beams 15 U-core 187 and a central leg 189 and 19 acts. The magnetic flux between the pole points. Between the U-core 187 and the central shoes 201 and the pole shoes 203 is through the Leg 189 has been shown a cylindrical ferrite magnet 191 arrows 225 and 227, respectively. The forces, rotatably arranged. The ferrite magnet 191 is like these magnetic fluxes on the corresponding electrodes Magnet 183 diagonally polarized and exerting tron rays in grooves 55 are indicated by arrows 229 in the U-core 187 and in the central leg 189 and marked 231. The electrics are set again. On the central limb 189 there is a corrugation winding that extends into the plane of the drawing 192 steered with connections 193 and 194. As with the vertical convergence and arranged in series with the winding 184, the correction unit can adjust the angular positions of the two is switched and also the size correction in 60 magnets 209 and 219, independently of one another, is vertical Direction causes. be asked. The same applies to the distance between the U-cores

The magnets 183 and 191 of the correction unit of the two pairs of pole shoes 201 and 203 from FIG. 10 can be rotated by the size adjustable so that the electron beams 15, 17 and and the polarity of the constant magnetic field are 19 in the desired manner to become static Converge through which the electron beams 15 and 65 can be brought genz. Likewise, like 19 will have to pass through. The magnetic equal field for the vertical convergence and correction unit for the beam 15 is represented by the arrows 195, the sawtooth-shaped current for the horizontal cutoff, while the field for the electron beam 19 directs the correction windings 211, 213, 221 and

223 is fed directly to adjust the magnetic flux acting on the electron beams 15 and 19. As a result, the two electron grids produced by these two electron beams are brought to the size of the "green" grid.

For the size differences in the horizontal and vertical directions shown in FIG. 9 shown are responsible for different reasons. The difference in size in the horizontal direction is caused by the action of the deflection yoke, the corrective forces to eliminate the generated parabolic errors that adhered to the previously known deflection systems. The size errors in the vertical direction, on the other hand, come from Cathode ray tubes with adjacent electron beams, as the invention is based are almost entirely due to a lack of adjustment of the electron gun. If the Electron guns are adjusted so well that size errors no longer occur in the vertical direction, so it is possible to get by with the horizontal correction and convergence unit alone and to omit the vertical correction and convergence unit. This will make the whole thing Deflection system even easier.

The circuit arrangement is shown schematically in FIG for a deflector part of a color television receiver in which the simplified Deflection system according to the invention is used. Those items from Fig. 12 that with individual Components that have already been illustrated and described correspond to the same Reference numbers have been provided.

The output stage 33 for the vertical deflection has a driver tube 233 with an anode 235, a grid 237 and with a cathode 239 .

The output of the tilt oscillator for vertical deflection (not shown) is fed to the control grid 237 so that a sawtooth deflection current arises in the primary winding of the output transformer 241 because the anode 235 is connected to the primary winding. The cathode 239 is connected to ground in the usual way via a potentiometer 243 , with which the linearity can be adjusted.

The secondary winding of the output transformer 241 is connected to the connection 141 , which in turn is connected to the first winding 124 of the winding distribution according to FIG. The first winding 124 is connected to the second winding 128 , which in turn is connected to the connection 145 .

The connection 145 is now directly connected to the connection 185 of the size correction coil 184 . The other terminal 186 of the correction coil 185 is directly connected to the terminal 193 of the size correction coil 192 , the other terminal 194 of which is connected to ground. In this manner, the same sawtooth deflection current that passes through deflection windings 124 and 128 will also flow through correction windings 184 and 192 and effect the necessary corrections discussed earlier.

The output stage for the horizontal deflection 39 has a driver tube 245 with an anode 247, a cathode 249, a control grid 251 and a screen grid 253 .

The output of the horizontal deflection oscillator (not shown) is fed to the control grid 251. The cathode 249 is grounded. The anode 247 is connected to a tap 257 of a conventional autotransformer 259 . The autotransformer 259 is provided with a damping circuit consisting of a diode 261, two associated capacitors 263 and 265 and an inductance 267. The diode 261 is used to create the desired sawtooth deflection signal on the autotransformer 259 in a known manner.

A high voltage rectifier 269 is connected to one end of the transformer winding and generates a high voltage which is fed to the cathode ray tube.

The sawtooth-shaped deflection signal that arises in the autotransformer 259 is coupled into a secondary winding 271 which is connected to the terminal 149 of the winding 132 from FIG. 6 is connected. the

So winding 132 is directly connected to winding 136 from FIG. 6, the connection 153 of which is directly connected to connection 214 of the horizontal correction winding 211 from FIG. The correction windings 211, 213, 223 and 221 are shown in FIG

«5 connected in series. Terminal 224 of winding 221 is connected to secondary winding 271 .

The deflection windings 132 and 136 are bridged by a capacitor 275 with a downstream resistor 273 in order to dampen strip formations in a known manner. Furthermore, a capacitor 277 is placed over the winding 136 , which is used to make the capacitances between the windings 132 and 136 equal.

A blanking winding 279 is coupled to the secondary winding 271 and is used to derive the blanking signal when the beam returns horizontally. However, since the blanking circuit itself is not part of the protection request, it does not need to be described in detail.

The circuit according to FIG. 12, like FIG. 6 that the switching point between the two windings 124 and 128 and the switching point between the two windings 132 and 136 are connected to one another by the line 281.

During the operation of the horizontal deflection stage 39 , a sawtooth-shaped deflection current is generated in the secondary winding 271 , which is passed on to the two deflection windings 132 and 136 . Thus, the same current then also flows through the size correction windings 211, 213, 223 and 221 , so that the required size corrections are effected, as already discussed.

You can adjust the size of the magnetic flux of the correction windings by having the The distance between the magnetic cores and the outer pole pieces is changed, as already described above became. The polarity of the magnetic field required for size correction, which in certain cases can be influenced by the sense of direction of the current in the individual windings.

Claims (13)

Patent claims: 1. Deflection system for a cathode ray tube with multiple electron beams, in which the Electron guns are arranged in one plane, and a luminescent screen on which grids of different colors can be generated by the electron beams, with a deflection yoke which is arranged between the electron guns and the luminescent screen and deflection windings with different distribution of the turns on the circumference for generating deflection fields in having horizontal and vertical direction, characterized in that the windings (89, 91) for the vertical beam deflection have further turns (93, 95, 97, 99) , by means of which a flux component (117) can be generated, which on the vertical deflection field (105 , 107) is vertical, so that the windings (53, 55) for the horizontal deflection have further turns (57, 59, 61, 63) by means of which a flux component (81) can be generated, which on the horizontal deflection field (69, 71 ) is perpendicular, and that the flux components of the magnetic field, which are perpendicular to the perpendicular, are exerted on the electron beams The forces are so great that the grids (165, 167, 169) which can be generated by the electron beams (15, 17, 19) are parallel to one another at all points, but differ in size. 2. Deflection system according to claim 1, characterized in that the turns of the windings (89, 91) for producing the vertical deflection field and the turns of the windings (53, 55) for producing the deflection field are arranged in different distributions in the horizontal direction. 3. deflection system according to claim 2, characterized in that the winding distribution in the vertical deflection windings is designed so that it can be expressed by the following series, F ₁ , = Λ sin (Φ) + B sin (3 Φ) + C sin (5 Φ) + D sin (7 Φ) + E sin (9 Φ) + F sin (11Φ) -r G sin (13 Φ ) + # sin (15 Φ) + ..., where Y _{v is} the percentage of the total number of turns in a quadrant of the deflection yoke and Φ is an angle that increases counterclockwise from the vertical axis of the deflection yoke, and that the distribution of turns in the horizontal deflection windings is formed to be by the following series is expressible, Y _H = Ssin (e) + Tsin (30) + E / sin (5 Θ)
+ V sin (7 &) + W sin (9 Θ)
+ Zsin (116>) + rsin (13 0) + Zsin (15 6>) + where Y _{11 means} the percentage of the total number of turns in a quadrant of the deflection yoke and Θ is an angle which increases counterclockwise from the horizontal axis of the deflection yoke. 4. deflection system according to claim 3, characterized in that the coefficients of the two Rows have the following values: E = F =
G =
H = 0.69, 3.48, -0.25, -0.56, 0.75, 0.62, t / = 1.51, F = -1.65, W = 0.68, X = 2.42, Y = 0.50, Z = -0.61. A = 97.99,
B = -4.55, S = 105.62,
T = 7.51, 5. deflection system according to claim 4, characterized in that the vertical deflection windings have 41 turns per quadrant and that the horizontal deflection windings per Quadrant have 31 turns. 6. deflection system according to claim 1, characterized in that a correction unit (27) for size errors in the horizontal direction is arranged between the deflection yoke (23) and the electron guns (9, 11,13), through which the size errors in the horizontal direction between the grids (165, 167, 169) of the three electron beams (15, 17, 19) can be canceled. 7. deflection system according to claim 1, characterized in that between the deflection yoke (23) and the electron guns (9, 11,13 _x a correction unit (25) for size errors in the vertical direction is arranged through which the size errors in the vertical direction between the grids (165, 167, 169) of the three electron beams (15, 17, 19) can be canceled. 8. deflection system according to claim 6, characterized in that the correction unit (27) for the size error in the horizontal direction a device for adjusting the static convergence having in the horizontal direction. 9. deflection system according to claim 6, characterized in that the correction unit for the size errors in the horizontal direction has correction windings which are connected to the horizontal deflection windings (53, 55) of the deflection yoke (23), through which a magnetic flux can be produced through which the two outer electron beams (15, 19) can be deflected in such a way that the grid (167, 169) on the screen (7) caused by the two outer electron beams (15, 19) are similar in size to that grid (165) that is used by the middle electron beam (17) can be produced. 10. Deflection system according to claim 9, characterized in that the correction windings (211, 213, 223, 221) are placed on core segments (205, 207, 215, 217) which are outside the cathode ray tube (1) next to the two outer electron beams (15 , 19) are arranged. 11. deflection system according to claim 7, characterized in that the correction unit (25) for the size error in the vertical direction a device for adjusting the static convergence having in the vertical direction. 12. Deflection system according to claim 7, characterized in that the correction unit (25) for the size errors in the vertical direction has correction windings which are connected to the vertical deflection windings of the deflection yoke (23) through which a magnetic flux can be produced through which the two outer ones Electron beams (15, 19) can be deflected in such a way that the two outer electron beams 909 533/166 (15, 19) caused grid (167, 169) on the luminescent screen (7) in their size to the one The same grid (165) that can be produced by the central electron beam (17). 13. Deflection system according to claim 12, characterized characterized in that the correction windings (184, 192) are placed on core segments (181, 189) are outside the cathode ray tube (1) next to the two outer electron beams (15, 19) are arranged. In addition 3 sheets of drawings