KR960000919B1 - Horizontal-liner compensating coil in monitor - Google Patents

Abstract

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Description

Horizontal compensation method in monitor and its coil

1 (a), (b) and (c) are structural diagrams of a horizontal compensation coil having a variable magnetic strength and inductance current response curves corresponding to different magnetic strengths,

2 is a first embodiment of the horizontal compensation coil of the present invention,

3 is a second embodiment of the horizontal compensation method and the coil of the present invention,

4 is a third embodiment of the horizontal compensation method and its coil,

5 is a fourth embodiment of the horizontal compensation method and its coil,

6 is a fifth embodiment of the horizontal compensation method and its coil,

7 is a simplified horizontal output circuit and waveform diagram in the electronic CRT horizontal deflection system of the monitor,

FIG. 8 is an equivalent circuit diagram at different times of the horizontal output of FIG.

9 is a DC resistance of a horizontal deflection coil, a horizontal output transistor and a dumper. Fig. 7 shows equivalent circuits and waveforms at different times in consideration of the electrical conduction resistance of the diode.

10A and 10B are horizontal linear compensation circuit diagrams of a conventional multi-scanning monitor divided into two or three stages.

(A), (b) and (c) are typical I-shaped iron core inductor structures and inductances. Current response curve

(A), (b), and (c) of FIG. 12 show an indication of applying a permanent magnet to the inductor of FIG. 11 and its inductance. Current response curve.

* Explanation of symbols for main parts of the drawings

B: Electromagnet C: Horizontal coil

D: magnetic field circuit

The present invention relates to a horizontal compensation method and a coil thereof in a monitor, in particular in an electronic CRT horizontal deflection system, in which a magnetic strength applied to a horizontal coil is varied, and in a monitor capable of compensating horizontal deformation. A horizontal compensation method and a coil thereof.

In today's information-rich modern society, computers become increasingly popular, and users are increasingly using them, and the range of using them is increasing day by day, and remote displays are not yet established, and differences of use and standards have not yet been established. Although the types of display adapters are increasing day by day, the resolution and horizontal frequency of various remote display adapters are not all made to the same standard.

Horizontal frequency of CGA remote display adapter: 15.7KHz

Resolution: 640 × 200

Horizontal Frequency of EGA Remote Display Adapter-21.8KHz

Resolution: 720 × 350

Horizontal Frequency of VGA Remote Display Adapter: 31.5KHz

Resolution: 640 × 350 640 × 400 640 × 480

Horizontal Frequency of VGA (8514) Remote Display Adapter: 35.5KHz

Resolution: 1021 × 768

Horizontal Frequency of SUPER VGA Remote Display Adapter-37.8KHz

Resolution: 800 × 600

NON INTERLACE 8514 Remote Display Adapter-Horizontal Frequency: 48.9KHz

Resolution: 1024X768

Since each is different, Yosai Computer. Monitor manufacturers compete to design monitors in a multi-scanning manner, increasing the compatibility between monitors and far-end display adapters, that is, the operation of two or more horizontal frequencies with one monitor. Is doing.

However, in the electronic CRT horizontal deflection system of the monitor, it is necessary to connect the linear compensation coil to the horizontal deflection yoke circuit 10 in series, and in addition to the DC resistance of the horizontal deflection yoke 11, the horizontal output transistor 12 and the dumper. . Since the electrical conduction resistance of the diode 13 is applied, the first half scan current is greater than the second half scan current, i.e., if the linear coil is not used, the left half of the CRT screen It is larger than the right side.

For example, what is shown in FIG. 7 is an electric circuit and a waveform of a simplified horizontal output, and what is shown in FIG. 8 is an equivalent circuit at different times of a horizontal output pole, and the horizontal deflection yoke 11 Internal resistance and horizontal output transistor (12) and dumper. In consideration of the electrical resistance of the diode 13, the resistor (R ₁ ) and the resistor (R ₂ ) are respectively connected to Fig. 8 (a) (d),

R ₁ = DC resistance of the horizontal deflection yoke 11 + electrical resistance of the transistor 12.

R ₂ = Horizontal resistance + dumper of horizontal deflection yoke 911). When the electric resistance of the diode is set as shown in Fig. 9, the left _half of the CRT screen is all right regardless of the size of R ₁ and R ₂ . On the other hand, as shown in FIG. 9 (a), when electricity is conducted to the transistor 12 (+ 0- + 3), R ₁ represents the voltage across the horizontal deflection oak 11. The effect of decreasing the collector current I _c of the transistor 12 with rising, and R ₂ in FIG. 9 (b) is opposite to R _1, and as the I _c becomes larger, the horizontal deflection yoke 11 is applied. Increase the losing voltage.

+ iy = E / R _1. (1-e ^{-tR1 / Ly} )

-iy = E / R _2. (1-e ^{(t-ts / 2) R2 / Ly} )

Since E is always in direct proportion to the horizontal frequency, stable scan width and high pressure are obtained. If the horizontal frequency differs in shape, E also changes, making horizontal compensation difficult, resulting in increased cost.

In addition, if the above equation is developed or directly observed in FIG. 9 (a) (b), the deformation of the horizontal line becomes severe as the E value decreases. On the contrary, when the E value is high, the horizontal deformation is very large. Can be seen

This is the reason why in a multi-scanning monitor, a fixed linear coil cannot precisely compensate for horizontal deformation.

Therefore, some contractors have designed a method for compensating for the deformation of the horizontal line used when the advanced multi-scanning monitor is operating at different horizontal frequencies and an electric circuit device thereof, for example, FIG. As shown in (b), it is divided into two or three stages, and the tenth (a) is a horizontal compensation method of the typical multi-scanning monitor. ) The inductance of the relatively large reverse slope by this connection. Creates a current response curve and provides a relatively large inductance change to compensate for the relatively severe deformation of the horizontal line formed by a relatively low power supply, when the relay switch 23 is ON when the high frequency stage (45-60 KHz) The inductance L ₂ of the linear coil 22 is short-circuited, and only the inductance L ₁ of the linear coil 21 is acted on so that a relatively small inductance change (i.e., inductance of a relatively small reverse inclination.) Corresponding curves) to compensate for the slight distortion of the horizontal lines formed by a relatively high power source.

In FIG. 10 (b), for the same reason, three linear coils 31, 32, and 33 are used to provide better linear compensation, but the two-stage, three-stage or more stages are compensated for. Even if it exists, there exists a fault as described below. In other words ;

1. Division compensation is not to compensate completely at any frequency within the entire horizontal frequency range, but only to a few frequencies within the local range.

2. Relays used (23, 34, 35) are expensive.

3. Compensation is obtained by dividing into multiple stages, so that a relatively good compensation can be obtained.

[Problem to Solve Invention]

SUMMARY OF THE INVENTION In view of the problems of horizontal compensation in conventional monitors, an object of the present invention is to provide a horizontal compensation method and a coil thereof in a monitor capable of compensating horizontal deformation of a multi-scan monitor at low cost. It is done.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a self-regulating coil in a magnetic field circuit of a horizontal deflection coil in an electronic CRT horizontal deflection system, and variably controls the magnetic strength applied to the horizontal coil, The inductance of the horizontal coil and the current response curve are converted to compensate for the linear deformation of the horizontal scan functioning at different horizontal frequencies, and the self-regulating coil installed in the magnetic field circuit of the horizontal coil. By connecting a control circuit to control the magnitude and direction of the current flowing through the self-regulating coil, and controlling the magnetic strength and polarity of the self-regulating coil with variable adjustment, the magnitude of the current conducting in the self-regulating coil and Changes in magnetic strength and polarity caused by changing direction are installed on the horizontal coil To obtain a magnetic strength of the magnets and cross-acceleration, the inductance acting on the horizontal coil. Consists of a current output corresponding to the current response curve can be controlled variably.

On the other hand, it is more preferable if the self-regulating coil is formed of an electromagnetic coil.

According to the present invention configured as described above, a horizontal compensation coil made of a self-regulating coil is provided in a magnetic field circuit of a horizontal coil in an electronic CRT horizontal deflection system of a monitor, and a control circuit is connected to the self-regulating coil. Since the magnitude and direction of the currents conducted in the self-regulating coil are controlled variably, the magnetic field strength and the polarity change caused by changing the magnitude and the direction of the currents conducted in the self-adjusting coil are changed on the horizontal line. By mutually adding and subtracting the magnetic strength of the permanent magnet installed in the mold coil, it is possible to variably control the current output corresponding to the inductance and current response curve applied to the horizontal coil, that is, change the qualified strength and polarity of the electromagnet. And furthermore the deformation of the horizontal lines resulting from the action at different horizontal frequencies. It can be.

These or other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

EXAMPLE

The horizontal compensator sphere of the present invention mainly attaches the electromagnet (B) to the magnetic circuit 100 of the horizontal coil (C) (Line Coil i.e. C is added). Proceed to the description in; First, in FIG. 11 (a), (b) and (c), typical inductor-shaped iron core inductances are shown. In FIG. 11 (b), inductance and current response curves of iron core inductors are shown. Becomes saturated at an increase of iy, and is saturated regardless of whether the current direction is positive or negative.

Therefore, referring also to the fact that the permanent magnet A is added to the inductor shown in FIGS. 12A, 12B, and 12C, when + iy conducts to the horizontal coil C, Since the magnetic flux polarity generated is the same as that of the permanent magnet A, + iy gradually saturates the iron core, and the amount of inductance is reduced against the increase of + iy. On the other hand, since -iy is opposite to the magnetic flux-polar permanent magnet (A) generated by the horizontal coil (C), the larger the -iy, the more the core becomes unsaturated and the inductance increases with the increase of -iy. do. In other words, the corresponding curve of the current and inductance in Fig. 12A is obtained.

Therefore, the inductance and current response curve shown in Fig. 12 (a) moves the figure 11 (b) to the left, and its moving distance is directly proportional to the strength of the permanent magnet A, or is foreign. It can be said that it is directly proportional to magnetic strength in Esau. The foreign magnetic field is equivalent to the application of the horizontal coil C to the permanent magnet A, and the inductance and current response curves of the horizontal coil C can be changed by changing the foreign magnetic strength.

In addition to the above description, the horizontal compensator sphere of the present invention is produced, and as shown in Figs. 1 (b) and (c), the structure is at the end of one ordinary horizontal coil (c), One self-regulating coil, that is, a second electromagnet B, is expanded to control the magnitude of the magnetic flux of the electromagnet B by controlling the magnitude of the current flowing through the coil, and the direction of the current is the direction of the magnetic flux. Decide Therefore, the direction and the intensity of the current can be controlled to determine the direction of the magnetic strength and the magnetic flux of the second electromagnet B.

Therefore, when the magnitude of the current il flowing through the second electromagnet B coil is changed, that is, the magnetic strength of the second electromagnet B is changed, and the second electromagnet B coil flows. By changing the direction of the current il, the polarity of the electromagnet B is changed. In other words, if the magnitude and direction of the current (il) flowing through the electromagnet coil are changed, the change in the magnetic strength and polarity of the electromagnet (B) resulting therefrom changes the total magnetic field strength of the magnetic field circuit of the horizontal coil (A). Then, the corresponding curve of the induced current iy of the horizontal coil A is changed as shown in FIG.

In addition, referring to Figs. 1 (a), (b), and (c) together, this indicates the inductance of the horizontal coil under the condition that the electromagnet (B) and the permanent magnet (A) interact with each other. Therefore, the magnetic strength applied to the horizontal coil (C) has a reinforcing effect because the magnetic flux direction generated by the electromagnet (B), which is the lowest first curve, is the same as the magnetic flux direction of the permanent magnet (A). It becomes more and more saturated. The second curve in the middle is an inductance current curve when the electromagnet B is not acting, and the third curve above the inductance current curve is the magnetic flux direction generated in the electromagnet B. Since the magnet and the permanent magnet A are opposed to each other, the magnetic strength applied to the horizontal coil C is reduced and induced to be relatively unsaturated.

That is, when the magnetic flux polarity (direction) of the magnetic flux generated by the electromagnet (B) and the permanent magnetic flux (A) are the same, it is equivalent to increasing the magnetic strength of the first horizontal coil (C), and conversely to the electromagnet (B). When the magnetic flux generated by the magnetic flux and the magnetic flux polarity of the permanent magnet A are opposite to each other, the magnetic strength of the horizontal flat coil is reduced. Therefore, when the magnetic strength of the horizontal coil C is increased or decreased, The current response curve changed in correspondence with the current iy is as shown in FIG.

This way. The adjustment of the characteristics of the electronic (non-mechanical) horizontal coil can be combined with a controlled electrical circuit, for example, the horizontal of the first to fifth shown in (1'-1 '' '' ') of Figures 2-4. A specific embodiment of the scan deflection circuit can be described as follows, since the characteristics of the horizontal coil can be modified and the linear deformation can be compensated for according to another horizontal frequency outside.

Shown in Figure 2 is a multi-scan monitor of 30-60 KHz, which is a block diagram of the system, and in particular what should be described is a linear compensation coil capable of compensating magnetic strength to compensate for horizontal deformation between 30-60 KHz. to be.

The difference between the horizontal scan deflection circuit 1 'of FIG. 2 and the conventional fixed horizontal frequency monitor is that the power supply voltage is directly proportional to the frequency of the multiple scan monitor and the horizontal frequency provided by the voltage converter (F TO V Convertor). It is necessary to send it to the output so that a stable screen area and high voltage can be obtained. R ₁ and R ₂ are negative feedback resistors, and the negative feedback feeds the C5 to stabilize the DC voltage. In addition, the voltage is directly proportional to the width of the horizontal scan and the high voltage. Therefore, when the horizontal frequency changes, the voltage converter outputs a voltage that is directly proportional to the horizontal frequency, so that the width of the scan and the high voltage cannot be maintained. have.

Q ₁ is a horizontal output transistor. D is a damper diode, C1 is frequency oscillation capacitor, Q ₂ is a transistor for controlling the magnitude of the electromagnet coil current, the base voltage of the electromagnet coil (Q ₂₎ is provided on the output side of the voltage converter R _3, R ₄ Through partial pressure of

In the case of 30KHz, 60V X (R ₄ / R ₃ + R ₄ ) = 12V

In the case of 60KHz, 120V X (R ₄ / R ₃ + R ₄ ) = 24V

One end of the coil of the electromagnet (B) is connected in series with 24 V, and the other end is connected to the emitter of Q _2. Therefore, at 60 KHz, the electromagnet (B) coil has no current and the horizontal frequency decreases. The electric current of the electromagnet (B) coil gradually increases, and reaches a maximum of 30 KHz, and the magnetic flux direction generated by this current and the stationary magnet are reversed. Therefore, at 60KHz, the power supply voltage (120V) is relatively high and the deformation of the horizontal line is relatively small, and the electromagnet (B) of the horizontal coil (C) does not work at 60KHz, so its inductance. Like the curve in the middle shown in (a), a relatively small inductance change (relative inductance and current response curve of relatively small inverse slope) can be provided to accurately compensate the horizontal line. In the case of 30KHz, since the power supply voltage (60V) is relatively low, the linear deformation becomes severe, and the magnetic flux direction in which the electromagnet B of the horizontal coil C and the polarity of the permanent magnet A are reversed, The inductance and current response curves provide a relatively large amount of inductance variation (i.e., a relatively large inductance and current response curve of inverse inclination), as indicated by the uppermost curve in FIG. will be.

The second-degree Substituting an electric circuit enclosed by a long dashed line in the circuit shown in FIG. 3, and there can be provided a backup system of a type of horizontal scan deflection circuit (1 "), is based on the principle that R _3, Since R ₄ acquires a voltage of 6V (30KHz) -12V (60KHz) from the frequency and the output partial pressure of the F TO V Converter, it reaches the base of Q ₂ through a 6V Zener diode. The current of the electromagnet (B) coil of the horizontal coil (C) at VB ₂ = 0 V-6 V is 0 (Zero) at 30 KHz, and increases more than 30 KHz, and increases at a difference of 60 KHz (6 V-0.6 V). ) / R ₅ , the magnetic flux generated by this current and the polarity of the permanent magnet A are in the same direction, and at 60 KHz, relatively small as shown in the bottom curve of Fig. 1 (a). It is a curve of inductance change (relative inductance and current response curve of small inverse slope) and a relatively small linear deformation Sanghayeo, when the 30KHz, in a first diagram (a) a relatively large inductance amount curve of change (large difficulties inductance Inc. current response curve) such as shown in the middle curve of, to compensate for the relatively large linear variation of.

Again shown in FIG. 4 is a horizontal scanning furnace (1 ''') of variable magnetic intensity of the third electromagnet B, and in the relatively low frequency range of 30-45 KHz, R ₁ .R voltage divider circuit of Figure ₂ when using a Q ₁ significance base partial pressure lower than the emitter (emitter) voltage Q ₁ reaches the OFF, and the variable resistor (VR ₁₎ is fine adjusting the current of the electromagnet (B) a coil, and further local The magnetic strength at the relatively low frequency of the electromagnet B is adjusted. On the other hand, when the frequency of 45-60KHz is in a relatively high area, the base of the partial pressure Q ₁ is higher than the emitter voltage, electromagnet Q ₁ is set to ON in a relatively high frequency zone variable resistor (VR ₂₎ ( B) Fine adjustment of the coil current is made to compensate for the different degree of linear deformation at different horizontal frequencies.

In addition, as shown in FIG. 5 and FIG. 6, in addition, horizontal scanning deflection circuits 1 '' '' and 1 '' '' 'which can variably control the magnetic strength of many electromagnets B, etc. There is an equivalent circuit, but needless to say. In any case, the present invention can change the strength and polarity of the electromagnet (B), and furthermore, in response to the compensation effect required by different horizontal frequencies, the inductance and current response curves can be changed to completely eliminate the difference in the linear deformation. Compensation objectives can be achieved.

Therefore, when the present invention is used in the electronic CRT horizontal deviation system, it is possible to compensate for the deformation of the horizontal lines caused by the operation at different horizontal frequencies of the multi-scan monitor, so that a relay that does not use an expensive and large space can be eliminated. In addition, it can reduce the cost and reduce the volume, maintain high reliability, and can be used specifically for the industry.

According to the present invention, in the electronic CRT horizontal deflection system of the monitor, a horizontal compensation coil composed of a self-regulating coil is provided between the magnetic field circuit of the horizontal type coil, and a control circuit is connected to the corresponding self-adjusting coil. Since the magnitude and direction of the currents conducted to the self-adjusting coil are controlled in a variable manner, the change in the magnetic strength and polarity caused by changing the magnitude and the direction of the currents to be conducted in the self-adjusting coil is applied to the horizontal coil. By mutually subtracting and subtracting the magnetic strength of the installed permanent magnet, the current output corresponding to the inductance and current response curve applied to the horizontal coil can be controlled variably, that is, the magnetic strength and polarity of the electromagnet can be changed, thereby furthermore It can compensate for the deformation of the horizontal line resulting from the action at different horizontal frequencies, It is a well by eliminating the need for a large space occupied by the relay, nor be able to reduce the cost to the volume reduction in size, it is possible to maintain high reliability.

Claims (4)

Horizontal line in a self-deflection CRT monitor with a horizontal deflection system comprising a horizontal deflection coil and a horizontal deflection coil (C) connected in series with the horizontal deflection coil, supplied with a voltage signal corresponding to the horizontal scan frequency from the display adapter. A type compensation method, comprising: coupling magnetic adjustment coils (B, B ') to a magnetic field circuit of a vertical linear coil (C), and a control circuit for controlling a current flowing in the magnetic adjustment coil according to a voltage signal of a monitor And a step of connecting the voltage, and controlling the current flowing through the self-regulating coils B and B 'according to the magnitude of the horizontal frequency applied from the display adapter to automatically adjust the inductance and current response characteristics of the horizontal coil C. Horizontal compensation method for monitors that change and adjust linearity automatically according to the horizontal frequency. A horizontal compensation device in a self-deflection type CRT monitor having a horizontal deflection system including a horizontal deflection coil, supplied with a voltage corresponding to a horizontal scan frequency from a display adapter, wherein the vertical linear coil is connected in series with the horizontal deflection coil. (C), a self-regulating coil (B, B ') having a core coupled to the magnetic field circuit of the vertical linear coil (C), and a coil wound around the core, and receiving a voltage signal from the monitor and accordingly receiving the self-regulating coil. Including the control circuit for controlling the current flowing in the current flowing through the self-adjusting coil (B, B ') according to the magnitude of the horizontal frequency applied from the display adapter inductance of the horizontal coil (C). Horizontal compensation device in the monitor that the corresponding characteristics are automatically changed so that the linearity is automatically adjusted according to the magnitude of the horizontal frequency. The method of claim 2, wherein the vertical linear coil (C) comprises an I-type ferrite core, a coil wound around the ferrite core and connected in series with a vertical deflection coil, and a permanent magnet attached to one end of the ferrite core. And the cores of the self-adjusting coils (B, B ') are attached to the other ends of the ferrite cores. The coil according to claim 2, wherein the vertical linear coil (C) comprises an I-type ferrite core, a coil wound around the ferrite core and connected in series with a vertical deflection coil, and permanently attached to both sides of the coil outer side of the ferrite core. And a magnet, wherein the cores of the self-adjusting coils (B, B ') are attached to both sides of the outer side of the coil of the ferrite core.