JPS6044946A - deflection yoke - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This publication 1Jl-1 relates to an improvement of a deflection yoke installed in a cathode ray tube of a television receiver or the like.

As shown in Fig. 1, the deflection yoke used in conventional television receivers is made of a wire wound in a ketoroidal shape around a substantially cylindrical or trumpet-shaped core (1).
2) This coil (2)
They are formed as one or more pairs of substantially point-symmetric wires with substantially the same winding specifications such as the number of turns and wire diameter. As shown in Figure 2, connect each coil (2) in series (
Alternatively, they are connected in parallel) so that substantially the same current flows, forming a substantially symmetrical magnetic field distribution as shown in FIG.

Such conventional toroidal coils have the following drawbacks.

(1) Special consideration is required for the winding device because one or more pairs of coils must be manufactured with a high degree of identity.

(2) High impedance - In other words, in coils that require a large number of turns, multi-layer split winding is required to prevent ringing, etc., which increases manufacturing time.

etc.

This release 1'! In view of the above-mentioned drawbacks, we decided to manufacture a deflection coil by forming the entire deflection magnetic field using an induced current as a closed circuit on one side of the coil. I-'44 Easy binding.

4 and 5, which are all embodiments of this invention, will be explained below.

In Figure 4, (2) is the original winding specification, and the core (I
(3) is the 10th coil, (3) is the second coil whose cross section is point symmetry with the first coil +21, and the inductance and DC I Winding +W where the ratio of pillow resistance is the same as that of the first coil (2)
Formed to specifications. , and a pair of coils t2+
+3) connects one side to the deflection circuit output end VC as shown in Figure 3.
It sold very well, and on the other hand, the first printing was sold as InJ.

Under such a configuration, a pair of coils +21 +31
Assuming that the mutual inktance relationship between the two coils is equal to 1, the AC impedance seen from the first coil (2) side is changed by the turns ratio of the coil +21 +3), and becomes equivalent to the impedance when connected in series. . Good luck, second coil (3)
D is the first coil +21+' (by induction Ueda, 1
2- Nose included.

2 11: Current flowing in the first coil (2) 1q1: Number of turns of coil t2i in building 1 12: Current flowing in the second coil (3) Ichihara N2: Number of turns of the second coil (3), turns ratio A current with the inverse ratio of will flow.

Therefore, the magnetic field 02 generated by the second coil (3)
is 1, gg = −N2・12− −Np+・” −ix
= -Nx-IJ=$zN, 2, and it is +j tn function to obtain the same total magnetic field regardless of the turns ratio of the pair of coils t21 +31. In other words, even if the winding specifications of the second coil (3) are different from those of the first coil (2), it is possible to generate the same deflection magnetic field, and as a result, the second coil (3) Forming ft1 by using a thick wire rod, the number of turns is completely reduced and it becomes possible to cast the wire, thereby making it possible to shorten the entire manufacturing time. -It's soil, the second coil (
3) Variable resistance, variable inductance, etc. in the closed circuit
#11 Flow Theory Adjustment 2 (By entering 4J, you can correct asymmetry etc., and also core (1)
Adjust by the coupling coefficient of - what to do? C machining can also perform linearity correction. Furthermore, since the first coil t21K DC component does not flow into the second coil (3), it is effective for correcting distortion and asymmetry.

In addition, although the above-mentioned embodiment has been explained using a pair of substantially point-symmetrical coils as an example, it can be similarly abused in a 1h) directed coil formed by a number of toroidal coils for each number of bales. can.

As explained above, according to the present invention, a new degree of conspicuousness can be given to the design and manufacture of the yoke, which is the practical value of the present invention.

4 Drawing i+rj ij1 catty theory+Bg4 1st 11) (
1st to 1st! Figure 3 shows the configuration of a conventional toroidal deflection coil.
The IM schematic diagram, Figures 4 and 5, are the existing diagrams of the deflection coil on the pole side of this output 1!11.

In the figure, fl) if: ff-y, +21 u Tg
1 (7') ':=ril, (3) is the second coil.

In the drawings, the same reference numerals represent the same or corresponding parts.

Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] Let v1''II be a cylindrical or trumpet-shaped core and a pair of coils wound toroidally around this core,
1. A deflection yoke characterized in that one of the pair of coils is made into a closed circuit and a current flowing through the other coil is induced to form a deflection magnetic field.