CN1131802A

CN1131802A - Flyback transformer device

Info

Publication number: CN1131802A
Application number: CN95120357A
Authority: CN
Inventors: 星山胜巳; 榎本邦彦; 稻叶昌明
Original assignee: Victor Company of Japan Ltd
Current assignee: Victor Company of Japan Ltd
Priority date: 1994-10-31
Filing date: 1995-10-30
Publication date: 1996-09-25
Anticipated expiration: 2015-10-30
Also published as: TW275177B; KR960015617A; JP3319664B2; JPH08130139A; KR100204449B1; CN1083142C

Abstract

The invention is provided to make a board small and adjustment work effective for a high- voltage feeding unit to a CRT. A fly-back transformer unit is made up of a main fly-back transformer body and a control circuit pack including a high-voltage stabilizing circuit. The control circuit pack is put movably on the lower potential side of the main transformer body . In this case, the high-voltage stabilizing control circuit is not mounted on a mounting board but on the main transformer body, so the mounting board is made small and the high-voltage regulation work becomes effective.

Description

Flyback transformer device

The present invention relates to provide the flyback transformer device of high pressure to cathode ray tube.

The cathode ray tube (CRT) that is used for television receiver or other display terminals needs anode voltage, focus voltage and screen voltage.

For these voltage is provided, television receiver or other display terminals are equipped with flyback transformer device and the high pressure variable resistor is called as " focusing on bag ".The effect of flyback transformer device is to boost and the rectification flyback pulse, and this flyback pulse is supplied with cathode ray tube as anode voltage.Focus on bag and be provided with the output voltage of flyback transformer device and separation and adjust this voltage, the voltage that generation is provided to cathode ray tube as focus voltage and screen voltage.

Recently, microminiaturized and low-cost in view of television receiver or display terminal is by flyback transformer device and mechanical connection and be electrically connected to the what is called " integrated-type flyback transformer device " that the high pressure variable resistor of kickback transformer constitutes and used at large.

Fig. 1 represents the example of the circuit board of an integrated-type kickback transformer and assembling integrated-type kickback transformer.

Among Fig. 1, flyback transformer device 1 is to constitute by kickback transformer 1a with high-voltage changable resistor 1b that kickback transformer 1a integrates.One comprises HT stabilizer circuit or adjuster 2a, and the high voltage stabilizing control circuit 2 of protection against X-ray circuit 2b and drive-pulse generator 2c etc. is set on the circuit board CB that is fixed with flyback potential device 1.On the identical limit of circuit board CB, flyback pulse generator 3, DC-DC transducer 4 and breaking circuit 5a and 5b etc. also are set up.

As shown in Figure 1, circuit board CB requires to have the space of a high voltage stabilizing control circuit 2, and this space makes the area of circuit board CB to strengthen.

In addition; because regulating the circuit of kickback transformer 1a high pressure also is arranged on the circuit board CB; so determining of the various adjustings of flyback transformer device 1 such as high voltage stabilizing characteristic; high voltage adjusting; definite grade of each protector circuit operation can not be implemented, unless flyback transformer device 1 is assemblied on the circuit board CB.This just hinders effectively regulates and high productibility.

For example, at such a case, a producer buys flyback transformer device from another part manufacturer and makes television receiver or display terminal, the producer of this television receiver must be installed in flyback transformer device the kickback transformer that the receiver adjusted is bought so, because part manufacturer does not regulate this kickback transformer, this can cause the reduction of productibility.

The purpose of this invention is to provide a kind of flyback transformer device, it has microminiaturized circuit board, and flyback transformer device assembles in the above and can be regulated effectively.

According to first kind of form of the present invention, the flyback transformer device that generation offers the cathode ray tube high pressure comprises a transformer portion, and it includes kickback transformer, and it includes high voltage stabilizing control circuit and a hookup mechanically to connect transformer portion and control circuit control circuit.

According to second kind of form of the present invention, the flyback transformer device that generation offers the cathode ray tube high pressure comprises a transformer portion, and it includes the shell of settling kickback transformer and is installed on the shell and supplies with variable resistor with kickback transformer voltage, a control circuit partly includes insulation crust and is placed in the high voltage stabilizing control circuit that insulation crust kickback transformer interior and in the transformer portion is electrically connected, it includes hookup the low-pressure side and second joining part that first joining part is arranged on transformer portion and is arranged on the control circuit part, so that machinery connects transformer portion and control circuit part separably.

The novelty that above and other purposes of the present invention and feature are pointed out description taken together with the accompanying drawings and appended claims further provides.

Fig. 1 is conventional integrated-type flyback transformer device and the circuit board that is assemblied in this flyback transformer device.

Fig. 2 is the perspective view according to the flyback transformer device of the embodiment of the invention.

Fig. 3 is the plane graph of flyback transformer device shown in Figure 2.

Fig. 4 is the flyback transformer device perspective view that has been separated the control circuit bag according to the present invention.

Fig. 5 is flyback transformer device and the perspective view that is assemblied in the circuit board of this flyback transformer device.

Fig. 6 is according to the variable-resistance resistor-printed board figure of the high pressure of flyback transformer device of the present invention.

Fig. 7 is the variable-resistance equivalent electric circuit of high pressure shown in Figure 6.

Most preferred embodiment of the present invention will be described with reference to the drawings.

Fig. 2 is the perspective view according to the flyback transformer device of the embodiment of the invention.Fig. 3 is the plane graph of flyback transformer device shown in Figure 2.Fig. 4 is the kickback transformer perspective view that has separated the control circuit bag according to the present invention.

Flyback transformer device 11 is connected transformer portion 21 low-pressure sides separably by a kickback transformer part 21 and control circuit bag 22 its machineries and forms.

It mechanically is assemblied in the side of shell 31 and forms with shell 31 electrical couplings so that supply with voltage with kickback transformer 1a in the shell kickback transformer 21 to settle kickback transformer 1a (Fig. 5) and high pressure variable resistor 1b by a casing 31.

That is, kickback transformer part 21 adopts the form of so-called integrated-type kickback transformer.Kickback transformer part 21 comprises the 1c unshakable in one's determination of kickback transformer 1a, focus adjustment button F1, F2 and screen grid adjusting knob S.

Control circuit bag 22 comprises that a shell wherein settles the high voltage stabilizing control circuit 12 (Fig. 5) of integrated circuit (IC) chip form.

As shown in Figure 4, control circuit 22 is installed to kickback transformer part 21 separably, this be by a plurality of attachment 22a at the insulation crust edge that is arranged on control circuit bag 22 (second attachment) be arranged on of the dismountable engagement of kickback transformer part 21 low-pressure sides and realize corresponding to the pawl 21a (first attachment) of the locational respective numbers of attachment 22a.

The flyback transformer device 11 shown in Figure 5 and the fixing layout of the circuit board of flyback transformer device 11.

All be in kickback transformer 1a in the flyback transformer device 11 and high pressure adjustable resistance 1b and the high voltage stabilizing control circuit 12 in control circuit bag 22 and be electrically connected to each other, upper case character A represents the high pressure demodulator probe of high pressure variable resistor 1b.

High voltage stabilizing control circuit 12 comprises the high pressure after its detection in the high pressure demodulator probe A of high pressure variable resistor 1b of at least one high voltage stabilizer (adjuster circuit) 2a goes out the high pressure HV of kickback transformer 1a and regulates detection, when the high voltage level that X-ray protection circuit 3b goes out with convenient detection raises and surpasses the level that requires restriction from leonard's tube radiation do not need X ray, a drive-pulse generator circuit 2c is in order to generate drive pulse signal.

One of example of high voltage stabilizer (adjuster) 2a can be the disclosed example of Japanese Unexamined Patent Publication No No.H6-284306.

On the other hand, be assemblied on the face of circuit board CB of flyback transformer device 11, the driving pulse of response drive-pulse generator 2c produces the flyback pulse generator circuit 3 of flyback pulse, DC-DC transducer 4 is to provide direct voltage to kickback transformer 1a, and the control signal that breaking circuit 5a, 5b response protection against X-ray circuit 2b produces when the rising of the high voltage level of kickback transformer 1a surpasses the level that requires stops the corresponding operating of flyback pulse generator circuit 3 and DC-DC transducer 4.

As mentioned above, in this embodiment, the control circuit bag 22 that is placed in high voltage stabilizing control circuit 12 is fixed to kickback transformer 21 separably.Therefore, need on the circuit board CB of fixing flyback transformer device 11, high voltage stabilizing control circuit 12 be set, can correspondingly reduce circuit board CB area like this.

In addition; determining of the various adjustings of flyback transformer device 11 such as the high voltage stabilizing characteristic of flyback transformer device 11; high voltage adjusting; determining etc. of the operation of corresponding protective circuit; can finish separately by flyback transformer device 11; there is no need it is installed on the circuit board CB and finish, because high voltage stabilizer 12 is included among the circuit board CB of flyback transformer device 11 sides.Therefore regulate efficient and productibility can be improved.

For as the reason that reduces expense to remove under the situation of high voltage stabilizing control circuit 12, it can only settle the control circuit bag 22 of high pressure stabilization control circuit 12 to remove by laying down from flyback transformer device 11, and the manufacture method of unnecessary change kickback transformer part 21.

Fig. 6 and Fig. 7 represent to constitute printed board figure and its equivalent electric circuit of the resistive element of high pressure variable resistor 1b respectively.

High pressure variable resistor 1b is included on the insulating circuit board of interior formation resistance pattern of insulation crust and electrode.

In Fig. 6 and Fig. 7, resistance pattern comprises fixed resistance part R1 to R7 and variable resistor part RF1, RF2 and RS.Variable resistor part RF1, RF2 and RS connect with rotatable adjusting knob F1, the F2 and the S that are arranged on the kickback transformer insulation crust 2 partly respectively.Variable-resistance resistance value and magnitude of voltage thereof be installed in sliding contact (not shown) and variable resistance RF1, RF2 and the RS sliding contact on corresponding adjusting knob F1, F2 and S top, so that can be regulated by rotating corresponding adjusting knob.

Upper case character H represents the high voltage input terminal from kickback transformer, and upper case character E holds with being.Arrow X1, X2, Y1 and Y2 are corresponding to the X1 among Fig. 2, X2, Y1 and the Y2 direction to show respectively among Fig. 6.

The direction of arrow X1 shows low potential side, thereby the side of ground end E place high pressure variable resistor 1b is a low potential side.

In the present embodiment, the control circuit bag 22 of arrangement high voltage stabilizing control circuit 12 is set at the low potential side 21 of kickback transformer part 21.Therefore, the fault or the faulty operation of the insulation breakdown high voltage stabilizing control circuit 12 of the control circuit bag 22 that any because high pressure causes, high-voltage noise, switching noise and static noise can be prevented from, and produce high reliability and accurate high voltage stabilizing is regulated.

In addition, because in the measure of the control circuit bag 22 of kickback transformer part 21 low potential sides, high-voltage stabilizing circuit 12 can be provided with near kickback transformer part 21.Therefore, can increase the microminiaturization of flyback transformer device 11.

Requirement shown in Figure 7 at the high-accuracy voltage divider resistance of high pressure demodulator probe A in the present embodiment the semifixed resistor R7 that utilizes by as shown in Figure 6 realize.Can select to regulate the variable resistor voltage ratio that is arranged on kickback transformer part 21 outsides.

The present invention referred in this flyback transformer device has following special-effect: (a) be arranged on back separably owing to the control circuit of settling the high voltage stabilizing control circuit is coated Sweep on the transformer portion 21, do not need so be assemblied in the circuit board side of flyback transformer device High voltage stabilizer is set. Therefore, the area of circuit board can correspondingly reduce. (b) the various adjustings of flyback transformer device are such as the establishment of high pressure stability characteristic (quality), height Press and regulate, the establishment of the operation of each protector circuit etc., flyback transformer device can be independent Finish and there is no need it is placed on the circuit board, therefore, the efficient of adjusting and Qi Ke give birth to Producing property can be enhanced. (c) for such as the former of decrease cost thereby go the situation of high pressure stabilization control circuit Lower, can be only settle the high voltage stabilizing control circuit by removing from flyback transformer device The control circuit bag removes the high voltage stabilizing control circuit, there is no need to change kickback transformer section The manufacture method of dividing. (d) because control circuit wraps in the measure of kickback transformer part low potential side, obtained height The fine adjustment of reliability and high voltage stabilizing becomes possibility. In addition, because the stable control of high pressure Circuit processed can partly arrange near kickback transformer, so flyback transformer device is miniature Change can strengthen.

Claims

1. one kind produces the kickback transformer of supplying with the cathode ray tube high pressure, comprising:

Transformer portion, it comprises kickback transformer;

The control circuit part, it comprises the high-voltage stabilizing circuit of described kickback transformer;

The hookup of described kickback transformer part of mechanical connection and described control circuit.

2. flyback transformer device according to claim 1 is characterized in that described transformer portion comprises:

In order to settle shell of described kickback transformer; With

Be assemblied in variable resistor part of voltage of supplying with in the described shell with described kickback transformer.

3. flyback transformer device according to claim 2 is characterized in that described.The variable resistance part branch includes the high pressure demodulator probe that comprises semifixed resistor.

4. flyback transformer device according to claim 1 is characterized in that the high pressure stabilization control circuit that described control circuit partly comprises insulation crust and is placed in the described insulation crust and is electrically connected with described kickback transformer in the described transformer portion.

5. flyback transformer device according to claim 4 is characterized in that described high pressure stabilization control circuit comprises:

A voltage stable circuit that is used to regulate the high pressure of described kickback transformer,

The protector circuit that the high voltage level that is used to prevent described kickback transformer unnecessarily uprises,

One is used to generate the drive-pulse generator circuit that the driving pulse that produces flyback pulse is supplied with described kickback transformer.

6. flyback transformer device according to claim 1 is characterized in that described hookup comprises:

Be arranged on first joining part of described transformer portion,

Be arranged on second joining part of described control circuit part.

7. flyback transformer device according to claim 6 is characterized in that described first attachment is arranged on the low potential side of described transformer portion.

8. flyback transformer device according to claim 6 is characterized in that described first attachment and second attachment comprise that machinery connects the jockey of described transformer portion and described control circuit separably.

9. flyback transformer device according to claim 8 is characterized in that described jockey comprises claw-form.

10. one kind produces the flyback transformer device of supplying with the cathode ray tube high pressure, comprising:

Transformer portion, it comprises the shell of settling kickback transformer and is assemblied in the variable resistor of also supplying with on the described shell with described kickback transformer voltage;

The control circuit part, the high pressure stabilization control circuit that it comprises insulation crust and is placed in the described insulation crust and is electrically connected with kickback transformer in the transformer portion;

Hookup, it comprises first attachment that is arranged on described transformer portion low potential side and is arranged on second attachment of described control circuit part, connects described transformer portion and described control circuit part separably with machinery.