JPH0112549Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in high pressure generators used in cathode ray tube devices such as television receivers.

Divide the high voltage coil (secondary coil) into multiple pieces,
2. Description of the Related Art A diode-divided high-voltage generating device in which each divided high-voltage winding is connected in series through a rectifying diode is conventionally known. Figure 1 shows an example of a conventional diode split type high voltage generator called the multi-singler type, in which a low voltage coil ( ₁
Next coil) L ₁ is wound around the same cylindrical high-pressure bobbin B ₁ , which has multiple separating collars on the outer periphery of L 1.
It has a configuration in which two divided high-voltage windings H ₁ to _{H 3} are arranged coaxially, and there is a winding end between the winding end of winding H ₁ and the winding start end of winding H ₂ , and a winding end of winding H ₂ . Rectifier diodes D ₁ , D 2 and _{D 3} are connected between and the winding start end of the winding H ₃ and the winding end of the winding H ₃ , respectively.
DC high voltage output E _HV from the cathode side of diode D ₃
It is for extracting. In addition, Fig. 2 shows that each divided high-voltage winding H ₁ to H ₃ is wound around a cylindrical high-voltage bobbin B ₁ to _{B 3} with different diameters, and is sequentially arranged coaxially in multiple layers around the outer periphery of a low-voltage coil L ₁ . An example of a conventional diode-divided multilayer coaxial high-voltage generator is shown.
In the figure, C indicates a core.

Generally, the performance of this type of high voltage generator can be improved by increasing the number of divisions by diodes. However, if the number of divisions is increased, the height direction (length direction) of the multi-singular system shown in Figure 1 increases, and the radial dimension of the multilayer coaxial system shown in Figure 2 increases, making the entire device larger. There is a drawback of increasing the size. Therefore, as a way to eliminate the above drawbacks, the configuration shown in FIG. 3, which is a combination of the configurations shown in FIGS. 1 and 2, can be considered. That is, the multi-singular system shown in FIG. 1 is made into multiple layers.
Specifically, if the high-voltage coil is divided into six parts, the first to third divided high-voltage windings _H1 to H3 are dividedly wound around the first high-voltage bobbin _B1 , and the fourth to third divided high-voltage windings H1 to _H3 are wound around the first high-voltage bobbin B1. A second high-voltage bobbin _B2 having a large diameter, in which sixth divided high-voltage windings _H4 to _H6 are wound in sections, is arranged coaxially to form a multilayer structure.

According to the above configuration, the number of diode divisions is increased and the size is only slightly increased in the radial direction, so it is a very useful method, but in reality the lower layer windings H ₁ and H There is no space for placing _the diodes D ₁ and D ₂ , which are connected between them and between the windings H ₂ and H ₃ , which is problematic in their implementation.

The present invention was made in view of the above points, and the high voltage bobbin from the second layer onwards is divided into two parts, eliminating the middle part, and the diode connected between the divided high voltage windings of the first layer is connected to this part. It is an object of the present invention to provide a high pressure generating device which is arranged in such a manner that the

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a schematic configuration diagram showing an embodiment of the present invention, and as shown in the figure, the first to third divided high voltage windings H ₁ to _{H 3} are attached to a first high voltage bobbin B ₁ having a separating collar. The second layer of high-pressure bobbins arranged coaxially around the outer circumference is divided into two parts _{, B2} and _B3 , and no high-pressure bobbin is placed in the center. The high-voltage bobbins B ₂ and B ₃ have the same diameter, and the fourth and fifth divided high-voltage windings H ₄ and H ₅ wound on them have the same winding width and number of windings as the first and third. Split high voltage winding H ₁ and H ₃
and the second divided high voltage winding _H2 is the winding
The winding direction of H ₁ and H ₃ is reversed, and the number of windings is approximately twice in this embodiment, but the winding width is shorter than twice. Specifically, as shown in FIG. 5, the bobbin around which high voltage windings other than the second divided high voltage winding _H2 are wound has a long bobbin length relative to the number of turns per unit. On the other hand, the bobbin around which the winding H ₂ is wound has a short bobbin length relative to the number of turns per unit. This is because the windings H ₁ and H ₄ and H ₃ and H ₅ have a multilayer structure, so it is necessary to reduce the radial dimension of the bobbin as much as possible. The winding is made longer and the radial dimension of the bobbin is reduced. On the other hand, winding _H2 does not have an upper layer on its outer periphery, so there is no problem even if the bobbin's radial dimension becomes slightly larger, so the bobbin length is shortened and the number of radial turns is increased. . By shortening the bobbin length of winding H ₂ , the length of winding H ₁ and
The longer bobbin length of H ₃ can be almost offset.
The overall bobbin length does not increase. Also, winding H ₂
Since it is located at the center of the low voltage coil _L1 , the leakage inductance with the low voltage coil _L1 is smaller than that of other windings, so even if the diameter of the winding becomes large, leakage inductance can be prevented from increasing. .

Since the present invention is configured as described above, there is a gap between the end of the divided high voltage winding _H1 of the inner layer and the beginning of the winding _H2 , and between the end of the end of the winding _H2 and the winding _H3 . The diodes _D1 and _D2 , which are respectively connected between the winding start ends of the winding H2, can be arranged and housed outside the winding _H2 , and the above-mentioned problem of where to arrange the diodes is completely eliminated. On the other hand, according to the configuration of the present invention, the windings H ₁ and H ₄ and H 3 and H ₃ have a multilayer structure.
H ₅ is the core Z-axis direction (winding width direction)
However, the amount of increase in the number of generated pulses is the same, and the amount of alternating current applied between the layers at each point is approximately zero. Furthermore, since the winding direction of the intermediate winding _H2 is opposite, a positive pulse is generated on the side approaching the winding _H1 , and a negative pulse is generated on the side approaching the winding _H3 . Therefore, H ₁ and H ₄
In the multilayered structure of _H3 and _H5 , the interlayer distributed capacitance is equivalently 0 for AC, and the winding
The distributed capacitance between H ₂ and the other windings is equivalently zero since the pulses generated at the ends of the windings adjacent to each other have the same polarity as shown in FIG. In this way, the capacitance relative to the resonant frequency becomes smaller, allowing higher-order resonance and further improving performance. Furthermore, since it has a multilayer structure and the winding start end of the first divided high-voltage winding _H1 is grounded (set to 0 potential), the winding start of the winding _H4 ,
The end of the winding of _H3 and the winding end of _H5 serve as DC outputs, so it is possible to directly take out the DC high voltage output _EHV without the need to connect a diode to the final output, making it possible to reduce costs. Furthermore, the beginning of winding H ₄ ,
Since the end of the winding of _H3 and the end of the winding of _H5 are at the DC level, distributed capacitance to the outside can be ignored, high frequency tuning is possible, and it is also advantageous for AC pulse withstand voltage. Furthermore, since the total length of the core can be kept small, there are many excellent advantages such as the ability to downsize the entire device.

Note that the focus voltage E _FV is determined by the DC output portion of the divided high-voltage winding, that is, the winding H ₂
It can be taken out from the connection point of windings H ₃ and H ₄ in the middle of . Particularly, when extracting the focus voltage from the second high-voltage winding _H2 , there is an advantage that the output lead wire can be easily drawn out because there is no high-voltage bobbin in the upper layer.

In the above embodiment, a case was explained in which the high voltage windings were coaxially arranged in two layers, but in the case of multilayering with two or more layers, the high voltage bobbin after the second layer is divided into two.
The present invention can be similarly applied by eliminating the intermediate portion. It goes without saying that various other modifications and changes can be made as necessary.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an example of a conventional multi-shingler type diode split type high voltage generator; Fig. 2 is a schematic configuration diagram showing an example of a conventional multilayer coaxial type diode split type high voltage generator;
The figure is a schematic configuration diagram showing an example of a high-pressure generator that combines a multi-singular system and a multilayer coaxial system, Figure 4 is a schematic diagram showing an example of a high-pressure generator according to the present invention, and Figure 5 shows its structure. Schematic diagram showing,
FIG. 6 is a diagram of the rate of increase of the pulses generated by the device of FIG. 4 during the retrace period. _H1 to _H5 : divided high-voltage winding, _B1 to _B3 : high-voltage bobbin, _L1 : low-voltage coil, _B0 : low-voltage bobbin.

Claims (1)

[Scope of utility model registration request] On the outer periphery of a low voltage coil wound around a cylindrical low voltage bobbin, divided high voltage windings of a plurality of divided high voltage coils are coaxially arranged in multiple layers, and a plurality of divided high voltage windings are arranged around each layer of the cylindrical high voltage bobbin. In a diode split type high pressure generator where wire is wound, the high pressure bobbin from the second layer onwards is divided into two to eliminate the middle bobbin part, and the bobbin is placed in the center part of the bobbin wound on the first layer high pressure bobbin. A high-voltage generator comprising: exposing a divided high-voltage winding, and arranging a diode connected between the divided high-voltage windings wound on the first-layer high-voltage bobbin in the exposed portion.