SU1159492A3 - Device for static convergence of electron beams in picture tube - Google Patents

Abstract

1. DEVICE OF STATIC INFORMATION OF ELECTRONIC RAYS IN KINESCOPE with a plenary arrangement of searchlights, containing a magnetic system installed on the neck of the kinescope, characterized in that, in order to improve the quality of the information, the magnetic system is made in the form of a magnetic unit formed in at least one four directions of 4 directions. and a magnetic unit formed by at least one six-pole magnetic element, each of these elements being complete with the possibility of independent gate poles and adjusting the magnitude of the magnetic field. SG) ate with

Description

2. The device according to claim 1, characterized in that the magnetic elements are made in the form of a multi-pole.

permanent ring magnets and are installed with the possibility of their independent rotation around the axis of the kinescope.

The invention relates to color television and can be used in the development of television receivers and video monitoring devices with a glider arrangement of searchlights. A device is known for the static convergence of electron beams in an osprey cia, which contains a system of magnetic blocks mounted on the neck of the kinescope and made on the basis of magnetic coils wound around a common magnetic circuit Li}. The known device is intended for use in a kinescope with a delta-shaped arrangement of searchlights. Closest to the present invention is a device for static convergence of electron beams in a kinescope with a planar arrangement of searchlights, which contains a magnetic system mounted on the neck of the kinescope. Magnetic system is implemented in. in the form of a pair of permanent ring magnets mounted on both sides of the neck so that their axes lie in the same plane with the axes of the searchlights. These magnets are magnetized in diameter and mounted so that they can rotate. The rotation of the magnets leads to the displacement of the extreme rays, which makes possible their static reduction of Sz. A disadvantage of the known technical solution is the difficulty of compensating for the influence of each magnet on the remaining electron beams. The purpose of the invention is to improve the quality of information. The goal is achieved by the fact that in the device of static convergence of electron beams in a kinescope with a pianar arrangement of illuminators containing a magnetic system installed on the throats, the magnetic system is executed in the form of a magnetic unit. formed by at least one four-pole magnetic element and a magnetic unit formed by at least one six-pole magnetic element, each of these elements being configured to independently rotate the poles and control the magnitude of the magnetic field. In addition, the magnetic elements can be made in the form of multipolar ring permanent magnets and installed with the possibility of their independent rotation around the axis of the kinescope. FIG. 1 shows a kinescope, side view; in fig. 2 - tube neck, cross section; in fig. 3-5 displacing the rays when the pair of four-pole magnets jointly rotate; in FIG. 6-8 is the same, six-pole magnets in FIG. 9-11 - the same, bipolar magnets; in fig. 12 and 13 ray shift with independent rotation of four-pole magnets; in fig. 14 and 15, the implementation of quadripolar magnetic elements based on electromagnets. The converting device is mounted on a kinescope with an expanding part 1 and a cylindrical throat 2. At the base, expanding from part t, a system 3 deviations of one of the known types is established. A magnetic system is installed on the cylindrical throat 2, which includes a unit for ensuring the purity of the luminescence, formed, for example, by a pair of permanent bipolar annular magnets 4 and 5, as well as two blocks of the ray-tracking system itself, the first of which is formed, for example, by a pair of three pole elements 6 and 7 , and the second pair of six-pole elements 8 and 9. These elements can be made in the form of ring permanent magnets (Fig. 1-13) mounted on a non-magnetic support 10, and equipped with 31 pair of petals 11 and 12 to facilitate their p LfTetanus rotation about the neck axis. Three spotlights are installed in the picture tube, producing three planarly arranged electron beams 13, 14 and 15. Magnetic elements 6 and 7 can also be made in the form of four pole electromagnets, powered from power sources 16 and 17, respectively {fig. 14 and 15). The device works as follows. When the four-pole elements are rotated together around the throat axis, the extreme rays (Figs. 3-5) are displaced in opposite directions with respect to the central beam 14 in either direction. When the six-pole elements are rotated together, the extreme rays (Figs. 6-8) are shifted towards the central beam 14 in one direction also in any direction. The joint rotation of these elements leads to a coplanar displacement of all three beams (Fig. 9-11). When the elements in the four-pole block (Fig. 12) are independently rotated, the four-pole magnet 6 is rotated 15 clockwise, while the magnet 7 rotated 15 ° to the side. The displacement directions of the beams 13 and 15 are the same as in FIG. 3, but the rays are smaller. These blocks can be made not only on the basis of permanent magnets, but also on the basis of ring electromagnets with a corresponding number of poles. FIG. 14 and 15 depict a pair of four-pole magnetic elements 6 and 7, made in the form of ring electromagnets, each of which has four windings, symmetrically arranged around the circumference of the rings, with the neighboring o6p. ki oppositely wound. The controllability and magnitude of the currents in the windings with the help of current sources 16 and 17 can achieve any of the effects shown in FIG. 3-5, without rotation of the elements 6 and 7. The one shown in FIG. 1 sequence of arrangement of magnetic blocks is optimal. It is advisable to first make adjustment bipolar elements, then six-pole and, finally, four-pole.

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Claims (2)

1. DEVICE FOR STATIC INFORMATION OF ELECTRON BEAMS IN KINESCO PE with the planar arrangement of spotlights, comprising mounted on the neck of kinescope magnet system, characterized in that _g in order to increase the quality of information, the magnetic system is configured as a magnetic unit formed of at least one four-pole magnitnm element and a magnetic unit formed of at least a hexapole magnetic element, the cop, each of said elements is capable of independent rotation and reproductive poles ^4-regulation of the magnetic field. Figure 1 2. The device according to π. 1, characterized in that the magnetic elements are made in the form of multipolar annular permanent magnets and are mounted with the possibility of independent rotation about the axis of the tube.