KR960015318B1 - Apparatus for deflecting electron beams and color cathode ray tube - Google Patents

Abstract

None.

Description

Deflection Device and Color Water Pipe Device for Color Water Pipe

1 is a circuit diagram showing a first embodiment of the present invention.

2 is a diagram showing a main part of a circuit configuration of the present invention.

3 is a view for explaining the operation of the circuit configuration of FIG.

4 is a schematic perspective view showing a second embodiment of the present invention.

FIG. 5 is a schematic circuit diagram showing the circuit configuration of the embodiment shown in FIG.

FIG. 6 is a diagram showing an essential part of the circuit configuration shown in FIG. 5; FIG.

FIG. 7 is a diagram explaining an operation in the circuit configuration of FIG.

8 is a schematic circuit diagram showing a circuit configuration of a third embodiment of the present invention.

9 is a schematic circuit diagram showing a circuit configuration of a fourth embodiment of the present invention.

FIG. 10 is a schematic circuit diagram showing a modification of the embodiment shown in FIG.

FIG. 11 is a schematic diagram showing a correction pattern of the embodiment shown in FIG. 9. FIG.

12 is a schematic circuit diagram showing the circuit configuration of the fifth embodiment of the present invention.

FIG. 13 is a view for explaining the operation and the correction pattern in the embodiment shown in FIG.

14 is a cross-sectional view showing the configuration of the color water pipe apparatus.

FIG. 15 is a schematic diagram showing the configuration of a deflection apparatus in FIG.

Fig. 16 is a diagram for explaining the cross-mis-convergence state of a pair of side beams appearing on a screen in a conventional color receiver apparatus.

17 is a view for explaining the principle of operation of a saturable reactor used in a conventional deflector or a color water pipe.

18 is a diagram showing coma aberration appearing on the screen of a conventional color receiver system.

* Explanation of symbols for main parts of the drawings

20,60: Horizontal deflection circuit 21,22,61,62: Horizontal deflection coil

23,25,63,65: Saturated Core

24a, 24b, 26a, 26b, 64a, 64b, 66a, 66b: inductance control coil

30, 70: vertical deflection circuit 35a, 75a: first saturation control coil

35b, 75b: second saturation control coil 40, 80: resistance

41, 42, 91, 92: diodes 73a, 73b, 74a, 74b: subcoil

The present invention relates to a deflection device for a color receiver and a color receiver, in particular a deflection current flowing in a deflection coil which generates a magnetic field which deflects an electron beam in a direction parallel to the beam array direction. The present invention relates to a deflection device for a color water pipe and a color water pipe device having a saturable reactor which changes in synchronization.

Generally, the color water management apparatus has a exterior container composed of a panel 1 and a funnel 2 bonded integrally as shown in FIG. 14, and is mounted inside the panel 1 to form a plurality of electron beam through holes. On the inner surface of the panel 1 opposite to the mask 3 is formed a phosphor screen 4 consisting of a tri-color phosphor layer which emits blue, green, and red and an electron gun 6 installed in the neck 5 of the funnel 2. ) By deflecting the electron beam BR (BG) (BB) emitted by the magnetic field generated by the magnetic field generated by the biasing yoke 7 mounted on the outside of the funnel 2 and scanning the phosphor screen 4 horizontally and vertically. Therefore, the phosphor screen 4 is formed in a structure for displaying a color image.

The deflection yoke 7 deflecting the electron beams BR, BG and BB has a pair of saddle-shaped horizontal deflection coils 8 through which a horizontal deflection current flows for deflecting the electron beam in the horizontal direction as shown in FIG. A pair of vertical deflection coils 9 and a separator 10 between the horizontal deflection coils 8 and the vertical deflection coils 9 through which a vertical deflection current flows for deflecting the electron beam in the vertical direction.

In Fig. 15, the vertical deflection coil 9 consists of a pair of upper and lower Troidal deflection coils, but a deflection yoke composed of a pair of left and right saddle deflection coils is also used.

In such a color receiving tube device, an inline type electron gun that emits an electron beam consisting of a center beam and a pair of side beams in which the electron guns are arranged in a horizontal direction, and the horizontal deflection magnetic field in which the deflection yoke is generated is a pincushion type, As a non-uniform magnetic field having a vertical deflection field as a barrel type, a line-type color water pipe device which is a self-convergence method for self-focusing an electron beam is widely used.

However, in this self-convergence line type color water pipe, various screen distortions occur due to pipe characteristics, pipe assembly errors, and the like.

One of them is the cross miss convergence pattern as shown in FIG.

As for the correction of the cross-mis-convergence pattern, Japanese Patent Laid-Open Publication No. 57-206184 and Japanese Patent Laid-Open Publication No. 2-194791, etc., differentially change the current flowing in a pair of horizontal deflection coils in synchronization with the vertical deflection current. In addition, a color water pipe device having a saturable reactor for correcting misconvergence by changing the shape of a horizontal deflection magnetic field with time is shown.

Usually, this saturable reactor is composed of an impedance control coil connected to an upper horizontal deflection coil in a pair of upper and lower horizontal deflection coils wound around a saturation core and a saturation control coil connected to a lower horizontal deflection coil.

The magnetic field generated by the saturation control coil applied to the saturable core wound around the impedance control coil is configured so that one impedance control coil is in the opposite direction to the other, and a static magnetic field is applied to these impedance control coils in advance.

The principle of operation of the saturable reactor is as shown in FIG.

In Fig. 17 (a), "H" denotes an exterior of a saturable core, "L" denotes an inductance of an impedance coil control coil, and the solid line 12 and the broken line 13 are two pairs of impedance control. The LH characteristic of the coil is shown.

Hmag is the static magnetic field and Hvm is the magnetic field due to the saturation control coil.

Here, the curve 12 represented by the solid line and the curve 13 represented by the broken line are symmetrical about the static magnetic field Hmag because the magnetic field caused by the saturation control coils applied to the two pairs of impedance control coils is reversed. .

The saturation control coil generates a magnetic field (Hvm) by flowing a vertical deflection current, and changes the inductance (Lu) (Ld) of the impedance control coil in the vertical direction by combining the static magnetic field (Hmg) and the magnetic field (Hvm).

FIG. 17 (b) shows the change in inductance Lu (Ld) with the horizontal axis as the vertical deflection current.

Since the cross miss convergence correction amount by such a saturable reactor is approximately proportional to the difference between the angstroms Lu and Ld of the two pairs of impedance control coils, the correction pattern is shown in the curve 16 shown in FIG. Becomes

The cross miss converence pattern in the conventional color water pipe apparatus had a pattern represented by 16th (a) and (b) degrees.

In recent years, however, the cross miss converging amount of the upper and lower middle portions of the upper and lower middle portions as shown in Fig. 16 (c) is due to the flattening of the color receiving tube device and the addition of complicated converging and distortion correction mechanisms. There are many patterns whose patterns are smaller than the amount of Zens, and the polarity of the cross miss converence at the upper and lower ends of the screen as shown in FIG.

In the conventional saturable reactor, since the correction amount monotonically increases with respect to the vertical deflection current, cross-mis-convergence patterns such as the sixteenth (a) and (b) diagrams are difficult to correct.

For this reason, the improvement of the quality was not acquired in the color water pipe | tube apparatus equipped with the conventional saturation reactor.

Another distortion is the coma aberration, which occurs because the deflection sensitivity for the Santa beam is stronger than the deflection sensitivity for the pair of side beams.

That is, in the self-convergence inline type color receiver, no correction means for the circuit is required, and as shown in FIG. 18, the rasters 11B and 11R of the pair of side beams BB BR over the entire screen. ), But the raster 11G of the center beam BG and the pair of side beams BB due to the difference in the deflection sensitivity between the center beam BG and the pair of side beams BB BR. It is difficult to match the rasters 11B and 11R, and coma aberrations represented by HCR and VCR occur at the horizontal horizontal axis (X axis) and the vertical axis (Y axis).

The correction of the coma aberration is magnetically coupled to the rear field of the deflection yoke to the beam emission short-axis electrode of the electron gun in a conventional inline type color receiver, so that the deflection sensitivity of a pair of side beams is relatively lower than that of the center beam. A field having a function of weakening can be corrected by arranging a magnetic element called a controller.

However, when the horizontal deflection frequency is increased, the convergence deviation occurs due to the AC loss of the magnetic element. Therefore, the magnetic field of the deflection yoke itself is increasing without using the magnetic element.

In this case, the HCR can be corrected by the horizontal deflection coil because the amount of misalignment is small, but the VCR remains because the correction amount is large for the VCR, which is difficult to correct by the vertical deflection coil.

So a pair The coil is wound around the core, and the auxiliary coil, which is connected in series with the vertical deflection coil, is placed vertically and symmetrically by inserting the horizontal axis on the electron gun side end (rear end) of the deflection yoke, Correspondingly, a means for correcting by a deflection device that generates a pincushion type magnetic field is taken.

In addition, Japanese Patent Laid-Open No. 63-225462 (USP 4,818,919) or the like shows a means for controlling the operation of the auxiliary coil by a diode so that the VCR correction can be efficiently performed throughout the screen.

As described above, when the screen distortion increases as it moves from the middle of the screen to the upper and lower ends, it is possible to correct to some extent.

However, there has been a problem that sufficient correction cannot be performed in the case where the screen distortion at the upper and lower middle portions increases with respect to the screen distortion at the upper and lower ends.

Japanese Unexamined Patent Publication No. 63-195935, Japanese Unexamined Patent Publication No. 1-175150, and Japanese Patent Laid-Open Publication No. Hei 1-183042 show a means of configuring a saturation control coil with two coils and controlling one coil with a diode. The above means could not correct for the 16th (a) and (d) degrees.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to effectively correct the screen distortion in the upper and lower middle portions and the upper and lower ends, and at the same time, a deflection device and a color receiving tube device for a color receiver having a high design freedom of correction amount. It aims to provide.

In order to solve the above problems, the present invention provides a first deflection coil for generating a magnetic field deflecting a plurality of electron beams arranged in a first direction in the same direction as the first direction, in a second direction perpendicular to the first direction. A deflection yoke including a second deflection coil for analyzing magnetic fields deflecting the plurality of electron beams, an impedance control coil connected to the first deflection coil, and a saturation control coil connected to flow a deflection current flowing through the second deflection coil. And a saturable reactor made of a saturable core wound around the impedance control coil and configured to differentially change a current flowing through the first deflection coil in synchronization with a current flowing through the second deflection coil. In the deflecting apparatus, the saturation control coil of the saturable reactor has a magnetic field of reverse polarity with respect to the first saturation control coil and the first saturation control coil. First and second saturation control coil consists generated.

And a second deflection ammeter configured at least with a resistor connected to the first saturation control coil to form a first deflection ammeter, together with a diode pair connected in reverse polarity to the second saturation control coil. And a circuit structure connected in parallel to each other so that the deflection current flowing through the second deflection coil can be classified into a first deflection current meter and a second deflection current meter, and control of generation of a magnetic field having reverse polarity with a diode It is a deflection device for color water pipes.

In addition to the above configuration, a pair of subcoils for generating an auxiliary magnetic field in synchronism with the current flowing through the second deflection coil is provided, and one pair of subcoils is connected to the second deflection ammeter. It is a deflection apparatus for a color water pipe characterized by being connected.

In addition, an inline electron gun for generating an electron beam consisting of a center beam and a pair of side beams arranged in a first direction, a first deflection coil for generating a magnetic field for deflecting the electron beam in the same direction as the first direction, and the first deflection coil; A deflection yoke comprising a second deflection coil generating a magnetic field deflected in a second direction perpendicular to the direction, an impedance control coil connected to the first deflection coil, and a saturable core to which the impedance control coil is wound; And a saturable reactor for differentially changing a current flowing in the first deflection coil in synchronization with the second deflection current, wherein the saturation control coil of the saturable reactor is a first saturation control coil. And a second saturation control coil which generates a magnetic field of reverse polarity with respect to the first saturation control coil.

And a second deflection ammeter configured with at least a resistor connected in series to the first saturation control coil to form a first deflection ammeter, with a diode pair connected to the second deflection control coil in reverse polarity. And a circuit structure connected in parallel to each other so that the deflection current flowing through the second deflection coil can be classified into a first deflection current meter and a second deflection current meter, and control of generation of a magnetic field having reverse polarity with a diode It is a color water pipe device.

In addition to the configuration, it is provided with two pairs of subcoils for generating an auxiliary magnetic field in synchronization with the current flowing in the second deflection coil, wherein one pair of subcoils is connected to the second deflection ammeter. It is a color water pipe device characterized in that.

The present invention basically aims at correcting cross-mis-convergence of a pair of side beams during picture distortion.

In addition, the inductance of the impedance control coil connected to the pair of first deflection coils deflecting the electron beam in the arrangement direction is a magnetic field in which the saturation control coils in which the deflection current flowing through the second deflection coil flows are synchronized with the deflection in the second direction. And generate a differential current between the pair of first biasing coils.

At this time, the saturation control coil is composed of a first saturation control coil and a second saturation control coil, at least a resistor is connected in series to the first saturation control coil to form a first deflection ammeter, and the second saturation with respect to the first deflection ammeter. A second deflection ammeter constructed together with a diode pair connected in reverse polarity with the control coil is in parallel and forms a fractionation path for the deflection current.

Therefore, the deflection current flows only in the first deflection ammeter until the diode rises, and no current flows in the second deflection ammeter.

When the diode rises, the deflection current flows into the second deflection ammeter.

At this time, since the first deflection ammeter and the second deflection ammeter are in parallel relationship, the deflection current is classified into the second deflection ammeter by the rise of the diode and the current flowing in the first deflection ammeter reaches the limit point.

In addition, since the second saturation control coil generates a magnetic field having the opposite polarity to the magnetic field generated by the first saturation control coil, the saturable core in which the impedance control coil of the saturable reactor is wound is separated from the magnetic field generated by the first saturation control coil. The magnetic field in the reverse direction also takes over.

That is, the saturation reactor is operated by the first saturation control coil to the upper and lower middle portions of the screen, and after the diode rises, the classification ratio of the first deflection ammeter and the second deflection ammeter and the generating magnetic field of the second saturation control coil itself. The amount of magnetic field generated by the saturation control coil is adjusted.

Therefore, by appropriately setting the magnetic field generation amount of the saturation control coil in synchronism with the deflection current, a correction pattern of a predetermined cross-mis-convergence can be obtained.

In the present invention, the following principle can also simultaneously correct VCR, which is a coma aberration between the center beam and the side beam, on the top and bottom of the screen.

That is, the correction of the VCR is performed to generate an auxiliary magnetic field in synchronization with a current flowing in the second deflection coil which generates a deflecting magnetic field for deflecting the electron beams arranged in the first direction in a second direction perpendicular to the first array direction. Correction of the cross-misconvergence number of the pair of side beams by means of a pair of subcoils causes the inductance of the impedance control coils connected to the pair of first deflection coils to deflect the electron beam in the arrangement direction to flow through the second deflection coil. The magnetic field generated by the saturation control coil flowing deflection current is changed in synchronization with the deflection in the second direction, and the differential current is generated only in the pair of the first deflection coils.

In the present invention, the siege control coil comprises a first saturation control coil and a second saturation control coil, and is configured with a diode connected in reverse polarity with a pair of second saturation control coils among two pairs of sub coils. A second deflection ammeter is provided, and a first deflection ammeter made of a series circuit of a first saturation control coil and a resistor is connected in parallel to the second deflection ammeter.

Therefore, since the second deflection ammeter hardly flows current until the diode rises, the VCR correction amount is controlled by the diode controlling one pair of servo coils out of two pairs of subcoils in synchronism with the deflection in the direction perpendicular to the electron beam array direction. Can be set freely.

In addition, since the first deflection ammeter and the second deflection ammeter are in parallel relationship, the deflection current is classified into the first deflection ammeter by the rise of the diode and the current flowing through the first deflection ammeter reaches the limit point.

In addition, since the second saturation control coil is wound so as to generate a magnetic field in the reverse direction with the first saturation control coil, when the diode rises, the magnetic field in which the first saturation control coil is generated and the magnetic field in the reverse direction are also generated in the impedance control coil.

Therefore, since the magnetic field generated in the saturation control coil of the saturable reactor as a rise of the diode is controlled by the rise of the diode, the correction amount of the cross miss converence changes in conjunction with the magnetic field.

By controlling the rise of the diode in this manner, the correction of the VCR and the cross miss convergence is made a predetermined correction pattern in synchronization with the deflection.

EXAMPLE

Embodiments of the present invention will be described below with reference to the drawings.

Example 1

1 is a diagram showing a circuit configuration of a deflection apparatus for a color receiving tube according to the present invention.

As shown in FIG. 1, in the horizontal deflection circuit 20, an impedance control connected to a pair of upper and lower horizontal deflection coils 21 and 22 and an upper horizontal deflection coil 21 and wound around the saturable core 23 The impedance control coils 26a and 26b, which are connected to 24a) and 24b and the lower horizontal deflection coil 22 and wound around the saturable core 25, are connected to each other.

The vertical deflection circuits 30 are connected to vertical deflection coils 31 and 32 and two saturation control coils 35a and 35b.

Impedance control coils 24a, 24b, 26a and 26b are wound around saturable cores 23 and 25, and a pair of saturation control coils 35a and 35b are synchronized with the vertical deflection current. A saturable reactor is configured to differentially change the current flowing through the horizontal deflection coils 21 and 22.

In general, horizontal deflection is performed at high frequency and vertical deflection is performed at low frequency.

The saturable reactor is to change the horizontal deflection current differentially in synchronism with the vertical deflection current as described above, and the saturation control coil 35a is applied to the saturable core wound around one of the impedance control coils 24a and 24b. The magnetic field in which the () 35b is generated is previously subjected to a static magnetic field by a magnet (not shown) in the other impedance control coils 24a, 24b, 26a, and 26b.

In addition, the two saturation control coils 35a and 35b have reverse polarity, that is, the magnetic field generated by the second saturation control coil 35b with respect to the magnetic field generated by the first saturation control coil 35a to become the reverse polarity magnetic field. It is.

As an example of the configuration in which the magnetic field is reverse polarity, the second saturation control coil 35b may be wound in the opposite direction in the coaxial direction with respect to the first saturation control coil 35a.

A resistor 40 and a choke coil 41 are connected in series to the first saturation control coil 35a to form a first deflection ammeter, and a pair of diodes connected in parallel to the second saturation control coil 35b in reverse polarity. (42) and 43 are connected in series to constitute a second deflection ammeter.

The first and second deflection ammeters are in a parallel relationship, and are configured to classify the vertical deflection currents.

Next, the operation of the present embodiment will be described.

2 shows a circuit configuration on the side of the vertical deflection circuit 30 in FIG.

The deflection apparatus according to the present embodiment mainly includes a saturable reactor and a vertical deflection current Iv flowing through the vertical deflection coil as a current I1 flowing through the first deflection ammeter and a current I2 flowing through the second deflection ammeter. The diodes 42 and 43 control the current I2 flowing through the second series circuit.

The relationship between the vertical deflection current Iv and the correction amount will be described with reference to FIG.

3 (a) shows the relationship between the vertical deflection current Iv and the currents I1 and I2 flowing through the first and second deflection ammeters.

The current I2 does not flow until the diode starts operation, and after the operation starts, the current I2 increases rapidly.

At this time, since the first deflection ammeter and the second deflection ammeter are in parallel, the deflection current is classified into the second deflection ammeter so that it does not increase linearly with the increase of "Iv" like a broken line, but flows through the first deflection ammeter. The current I1 decreases.

In addition, since the second saturation control coil 35b of the second series circuit is configured to generate a magnetic field of reverse polarity with respect to the first saturation control coil 35a, as shown in FIG. 3 (b) after the diode rises. Likewise, the magnetic field H2 from which the second saturation control coil is generated increases rapidly.

At this time, since the current flowing in the first deflection ammeter decreases, it does not increase linearly with the increase of "Iv" like a broken line, but the magnetic field H1 in which the first saturation control coil is generated reaches the limit.

As a result, the magnetic field of the whole saturation control coil decreases compared with the magnetic field of only the first saturation control coil before the diode rises, and the magnetic field applied to the impedance control coil decreases.

That is, the magnetic field in the saturation control coil is maximum in the middle of the screen where the diode rises.

As described above, the saturable reactor controls the horizontal deflection current as the inductance of the impedance control coil is changed by the magnetic field generated by the saturation control coil.

Therefore, by controlling the generated magnetic field of the saturation control coil, the correction amount of the cross miss convergence can be changed to the middle part of the screen and the top and bottom ends.

In addition, the correction pattern of the cross miss converence can be selected by adjusting the magnetic field generated by the first and second saturation control coils and the rising point of the diode.

That is, the slope of the correction amount curve as shown in FIG. 12 (c) is the magnitude of the magnetic field of the first saturation control coil, and the screen position at which the maximum correction amount is obtained is the rising position of the diode, and the slope of the correction amount curve after the rising And the fractionation ratio of the second deflection turnmeter, or the magnetic field generated by the second saturation control coil.

In addition, adjustment of the magnetic field can be adjusted by the split ratio of the first deflection ammeter and the second deflection ammeter and the number of turns of the saturation control coil.

In this embodiment, the choke coil is arranged, but the choke coil adjusts the induced electromotive force generated in the closed circuit composed of the first and second deflection ammeters.

That is, the total amount of induced electromotive force generated by the coil in the closed circuit having the induced electromotive force generated by the choke coil is adjusted, and the transient induced current at the start of scanning is alleviated.

In addition, although the structure of a saturable reactor in this embodiment, especially the horizontal deflection circuit side is not demonstrated in detail, if the structure of the saturation control coil connected to a vertical deflection coil is as shown in this embodiment, what kind of conventional It can also be used as a type.

Although the saturation control coils 35a and 35b in FIGS. 1 and 2 are connected to the vertical deflection coils 31 and 32, the vertical deflection current may flow directly without being connected to the vertical deflection coils. .

As described above, according to the present embodiment, the saturation control coil of the saturable reactor is divided into two types of forward and reverse directions, and the saturation control coils of the reverse direction are controlled by diodes in parallel to each other. The effect can be corrected and the design can be easily performed.

Example 2

The first embodiment relates to a deflection device for a color water pipe, and an embodiment of the color water pipe device according to the present invention will be described next.

The overall configuration of the color water pipe apparatus is the same as that shown in FIG. 14, and has an exterior container composed of a panel 1 and a funnel 2 bonded together, and is mounted inside the panel 1 to pass through a plurality of electron beams. On the inner surface of the panel 1, a shape screen 4 made of a three-color phosphor layer is formed on the inner surface of the panel 1 facing the shadow mask 3 having a hole, and the neck 5 of the funnel 2 is formed. Electron beams (BR) (BG) (BB) emitted from the electron gun 6 installed therein are deflected by the magnetic field generated by the deflection yoke 7 mounted on the outside of the funnel 2, and the phosphor screen 4 is rotated. It is formed in such a structure that a color image is displayed on the phosphor screen 4 by scanning horizontally and vertically.

As described above, the deflection yoke 7 deflecting the electron beams RB (BG) and BB has a pair of saddle-shaped horizontal flows in which a horizontal deflection current flows for deflecting the electron beam in the horizontal direction as shown in FIG. It mainly consists of a deflection coil 8, a pair of vertical deflection coils 9 through which a vertical deflection current flows for deflecting the electron beam in the vertical direction, and a separator 10 between the horizontal deflection coils 8 and the vertical deflection coils 9. Consists of.

In Fig. 15, the vertical deflection coil 9 is made up of a pair of upper and lower Troidal deflection coils, but a deflection yoke constituted by a left and right pair of saddle deflection coils is also used.

In general, an inline electron gun that emits an electron beam consisting of a center beam and a pair of side beams in which the electron guns are arranged in a horizontal direction, and a pincushion type of vertical deflection magnetic field in which a deflection yoke is generated, and a barrel type of vertical deflection field The non-uniform magnetic field of the present invention is a self-convergence line-type color interphase device for self-focusing electron beams.

The deflection apparatus in this embodiment has the same structure as that shown in FIG. 1, and is as shown in FIG.

In the embodiment shown in FIG. 1, the second deflection ammeter consisting of the second saturation control coil and the diode pair is connected in parallel with the first deflection ammeter including the first saturation control coil.

This classifies the current flowing through the first saturation control coil to the diode side to reach the limit point, and generates a magnetic field in the opposite direction to the magnetic field generated by the first saturation control coil by the second saturation control coil to effectively effect the magnetic field reversal. This is for implementation.

Example 3

Depending on the color water pipe apparatus, there are the same coma aberrations represented by the above-described VCR in addition to Cross-Miss Convergence.

Therefore, the following describes an embodiment for solving the problem.

4 is a perspective view showing an embodiment of a deflection apparatus for a color water pipe according to the present invention.

As shown in FIG. 4, the deflection device 50 includes a first deflection coil (not shown) which deflects electron beams arranged mainly in a line in this arrangement direction, and a deflector which deflects the electron beam in a direction perpendicular to the beam array direction. 2 deflection coils 51 A pair of subcoils 54a, 54b, 55a and 55b disposed between the separator 52 positioned between these deflection coils and the electron gun side rear end 53 of the separator 52. )

The subcoils 54a and 54b are wound around a pair of rod-shaped cores 57a and 57b arranged on the array side (X side) of the electron beam.

Although not shown, the first deflection coil and the second deflection coil are connected to a saturable reactor that differentially changes the current on the output side in synchronization with the current on the input side by using a change in the inductance of the coil caused by the magnetic field.

In general, electron beams are arranged in a horizontal direction, the first deflection coil is a horizontal deflection coil, and the second deflection coil is a vertical deflection coil.

The circuit configuration of the deflection apparatus shown in FIG. 4 will be described with reference to FIG.

As shown in FIG. 5, the horizontal deflection circuit 60 is connected to the upper and lower pairs of horizontal deflection coils 61 and 62 and the upper horizontal deflection coils 61 and wound around the saturable core 63. Impedance control coils 66a and 66b connected to the 64a and 64b and the lower horizontal deflection coil 62 and wound around the saturable core 35 are connected.

Further, in the vertical deflection circuit 70, the vertical deflection coils 71 and 72, the first sub coils 73a and 73b and the second sub coil 74a connected in series to the vertical deflection coils 71 and 72, respectively. Two pairs of sub-coils of () 74b are connected, and two saturation control coils 75a and 75b are connected.

Impedance control coils 64a, 64b, 66a, 66b are wound around saturable cores 63, 65 and together with the saturation control coils 75a, 75b in a pair of synchronous deflection currents. A saturable reactor is configured to differentially change the current flowing in the horizontal deflection coils 61 and 62.

The saturable reactor changes the horizontal deflection current differentially in synchronism with the vertical deflection current as described above, and the saturation control coil is applied to the saturable core 63 on which the impedance control coils 64a and 64b are wound. The magnetic fields generated by (75a) and (75b) are configured to be reverse to the saturable core 65 on which the other impedance control coils 66a and 66b are wound, and these impedance control coils 64a and 64b are reversed. The saturable cores 63 and 65 on which the (66a) and the (66b) are wound are subjected to a static magnetic field in advance by a magnet (not shown).

In addition, the two saturation control coils 75a and 75b have reverse polarity, that is, the magnetic field generated by the second saturation control coil 75b with respect to the magnetic field generated by the first saturation control coil 75a becomes the reverse magnetic field. have.

As an example of the configuration in which the magnetic field is reverse polarity, the second saturation control coil 47b may be wound around the first saturation control coil 75a in the coaxial direction in the reverse direction.

In addition, a resistor 80 and a choke coil 81 are connected to the first saturation control coil 75a to form a first deflection ammeter, and two pairs of subcoils 73a, 73b and 74a with respect to the first deflection ammeter. A first deflection ammeter composed of a pair of sub-coils 74a and 74b and a diode pair 91 and 92 connected in parallel with the first saturation control coil 75b in reverse polarity. The configuration is connected to.

Next, the operation of the present embodiment will be described.

FIG. 6 shows a circuit configuration on the side of the vertical deflection circuit 70 in FIG.

In the present embodiment, the deflection apparatus mainly includes a subcoil of a saturable reactor, and a vertical deflection current flowing through a pair of (73a) 73b between the vertical deflection coils 71 and 72 and the two pairs of subcoils ( The current I110 flowing through the first deflection ammeter DC1 including the first saturation control coil 75a and the resistor 80 in series circuits, and one pair 74a and 74b of the two pairs of subcoils. The second deflection ammeter DC2 configured with the diode pairs 91 and 92 connected in reverse polarity with the second saturation control coil 75b is divided by the current I20, and the second deflection ammeter DC2 Is controlled by the diodes 91 and 92.

The relationship between the vertical deflection current and the correction amount will be described with reference to FIG.

7 (a) shows the relationship between the vertical deflection current Iv and the currents I10 and I20 flowing through the first and second deflection ammeters.

The current I20 does not flow until the diode rises, but after rising, the current I20 rapidly increases.

Since the second deflection ammeter DC2 is connected with one pair of subcoils out of two pairs of subcoils, correction (B) by this subcoil is applied after the diode rises as shown in FIG. 7 (b). As a result, it is possible to correct the VCR in which the shift amount increases as it moves to the top of the screen.

That is, the deflection current Iv flows through the first deflection ammeter DC1 up to the point where the diode is superposed, for example, the middle portion of the screen. Only the VCR correction A by the pincushion type magnetic field generated by the subcoils 73a and 73b wound around the magnetic core is generated.

The VCR correction action by this pincushion magnetic field is the same principle as before.

When the diode rises at the upper and lower ends of the screen and the deflection current is also classified in the second deflection ammeter DC2, the barrel magnetic field is generated in which the sub coils 74a and 74b are wound around the pair of rod-shaped cores. Correction (B) is also applied.

The same principle applies to the VCR correction by the barrel-type magnetic field.

In addition, since the first deflection ammeter DC1 and the second deflection ammeter DC2 have a parallel relationship, the current I2 of the first deflection ammeter reaches a limit point along with the classification of the second deflection ammeter due to the rise of the diode. Decreases.

Since the second saturation control coil 75b is configured to generate a magnetic field of reverse polarity with respect to the first saturation control coil 75a, the second saturation control coil as shown in Fig. 7 (c) after the diode rises. The magnetic field Hv2 at which 75b occurs occurs rapidly increases.

Therefore, when the diode rises, the deflection current is classified into the second deflection ammeter DC2 so that the second saturation control coil 75b generates a magnetic field of reverse polarity.

In addition, since the current flowing in the first deflection ammeter DC1 is reduced, the magnetic field generated by the first saturation control coil reaches a limit point.

As a result, the magnetic field of the saturation control coil as a whole decreases compared to the magnetic field of only the first saturation control coil before the diode rises, and the exterior of the impedance control coil is reduced.

Therefore, the correction amount of Cross Miss Convergence can be changed to the middle of the screen and the top and bottom of the screen.

In addition, the correction pattern of the cross miss converence can be variously selected by adjusting the magnetic field generated by the first and second saturation control coils and the rising point of the diode.

That is, the slope of the correction amount curve as shown in FIG. 13 (c) is the magnitude of the magnetic field of the first saturation control coil, and the screen position at which the maximum correction amount is obtained is the rising position of the diode. The fractionation ratio of the first and second deflection ammeters or the magnetic field generated by the second saturation control coil can be adjusted.

In addition, adjustment of the magnetic field is possible by the split ratio of the first deflection ammeter and the second deflection ammeter and the number of turns of the saturation control coil.

In the present embodiment, the choke coil is arranged, but the choke coil adjusts the induced electromotive force generated in the closed circuit composed of the first and second deflection ammeters.

In other words, by adjusting the sum total of the induced electromotive force generated by the choke coil and the coil in the closed circuit, the transient induced current at the start of scanning is alleviated.

Although the configuration of the saturable reactor in this embodiment, in particular with respect to the horizontal deflection circuit side, has not been described in detail, any configuration of the saturation control coil connected to the vertical deflection coil as shown in this embodiment has been described. It can also be used as a type.

In the present embodiment, the correction of the VCR is performed by a pair of subcoils to the middle of the screen among the two pairs of subcoils, and by a pair of subcoils from the middle to the upper and lower ends. Although the above description has been made, the magnetic field in which the two pairs of subcoils are generated may be set in accordance with the pattern of the VCR, and a negative correction between the upper and lower ends of the screen can also be used to reduce the amount of correction VCR correction.

5 and 6, the saturation control coil and the subcoil are connected to the vertical deflection coil, but the deflection current may be directly flown without being connected to the vertical deflection coil.

As described above, according to the present embodiment, the VCR correction subcoil is composed of two pairs of subcoils, the saturation control coil of the saturable reactor is divided into two, and one pair of subcoils and two among the two pairs of subcoils. By using a single saturation control coil with a diode, it is possible to simultaneously correct various misalignment patterns of the VCR and cross-miscance, and to easily design the same.

Example 4

Next, another Example of this invention is described.

In the third embodiment, the configuration in which the two pairs of subcoils are wound around different cores is shown, but the same cores can be wound.

The circuit structure in the case of winding around the same core is shown in FIG.

In the drawings, the same numerals indicate the same as the fifth degree.

In this embodiment, Winding two pairs of subcoils around the magnetic core and performing VCR correction by a pincushion magnetic field by a pair of subcoils before the diode rises, and applying a pincushion magnetic field by another pair of subcoils after the diode rises. It is.

In addition, the connection state of the sub coil, the saturation control coil, the ding code, the resistor, and the like connected to the vertical deflection circuit is the same as that shown in FIG.

Example 5

Example 4 and Example 5 relate to a deflection device for a color water pipe, and an embodiment of the color water pipe device according to the present invention will be described next.

The overall configuration of the color water pipe apparatus is the same as that shown in FIG. 14, and the deflecting apparatus for deflecting the electron beam is the same as that shown in FIG.

The deflecting device in this embodiment is as shown in FIG. 5 or 8 in a circuit.

Therefore, the detailed configuration and operation are the same as in the above-described embodiment, and the VCR and the cross miss converence can be simultaneously corrected, wherein the setting of the correction pattern is the rising point of the diode, the classification ratio of the first and second deflection ammeters, and the first And the number of turns of the second saturation control coil.

Further, even if the most appropriate design is carried out using the circuit shown in the above embodiment, it may happen that the screen distortion cannot be sufficiently corrected.

That is, unbalance with respect to the polarity of the deflection current may occur due to the effect of the difference between the rise and fall characteristics of the diode or the difference between the upper and lower parts of the vertical deflection of the color water pipe.

In addition, unbalance may occur in the design asymmetry of the yoke and the color water pipe.

There is also unbalance due to manufacturing cracks in the deflection yoke or color water pipe.

Such an unbalance causes deterioration in the upper and lower screens, thereby deteriorating the convergence characteristic of the color receiver.

Such unbalance can be mitigated by using diode pairs with different operating voltages or by attaching magnetic or magnet pieces to the deflection yoke.However, when using diode pairs with different operating voltages, the type of diode used increases. There is a problem such as a large selection range of the operating voltage, and a means of modifying by attaching a magnetic body piece or a magnet piece to the deflection yoke part can mainly correct only the periphery of the screen, and it is difficult to correct the screen center part.

In such a case, there is a method of connecting and controlling an impedance element in series with at least one diode of a reverse polarity parallel diode pair.

That is, as shown in FIG. 9, when a resistor 93 is connected in series as an impedance element to one diode of a reverse polarity parallel diode pair, the diode-side resistance on the side to which the impedance element is connected increases.

In addition, as shown in FIG. 10, the resistance of the diode pair can be controlled by adding the resistor 94.

Thereby, it becomes possible to adjust the classification ratio of "I10" and "I20" up and down the screen.

That is, when unbalance occurs in the split ratio on the upper side and the lower side of the screen, a modulation characteristic balanced on the screen can be obtained by connecting an appropriate impedance element in series with one diode.

Therefore, in the case of the unbalanced color receiver, the characteristics of the image can be adjusted by adjusting the correction pattern in the diagonal lines of FIGS. 11 (a) and (b) as the resistance value is adjusted according to the unbalance of the necessary correction amount. Can be improved.

As shown in FIG. 12, the modulation characteristics of the deflection current by the diode pair can be controlled by connecting a variable resistor or a variable inductance element in parallel to a pair of diodes having reverse polarity in the deflection circuit.

In FIG. 12, since the bypass circuit is connected to the diode pair in parallel, even though the diode is in an insulated state, "Iv" is classified into the first deflection meter and the second deflection meter in the classification ratio according to the impedance of the bypass circuit. In a region where "I2" is 0, "I2" has a certain current value.

Likewise, I1 is also reduced by Iv-I2 and the operating point of the diode is also shifted to the vertical axis end side.

Fig. 13 (a) and Fig. 13 (b) and Fig. 13 (c) show changes in the correction pattern of VCR and cross-mis-convergence, respectively.

In this manner, the bypass circuit can mainly change the correction pattern of the diode non-operation region.

In addition, since the bypass circuit generates no induced electromotive force and hardly changes the resistance of the closed circuit portion, the bypass circuit does not cause damage at the start of scanning due to the induced current of the closed circuit portion.

That is, since the choke coil does not need to be manufactured, it is possible to adjust the bypass circuit impedance independently, and to easily provide the crack absorbing means of the color water pipe.

Although the VCR correction subcoils are also connected to Figs. 9, 10, and 12, it is also possible to target only cross misconductance without connecting the subcoils.

As described above, according to the present invention, the saturation control coil constituting the saturable reactor is composed of two coils in the forward direction and the reverse direction in a parallel relationship, and the saturation control coil in the reverse direction controls the diode. Even when the screen distortion is larger than the screen distortion of the upper and lower ends, it can be effectively corrected.

In addition, a predetermined correction pattern can be obtained by controlling the rise ratio of the diode or the classification ratio of the deflection current.

Claims (5)

A first deflection coil for generating a magnetic field for deflecting the plurality of electron beams in a first direction and a second deflection coil for generating a magnetic field for deflecting the plurality of electron beams in a second direction orthogonal to the first direction; A deflection yoke, an impedance control coil connected to at least the first deflection coil, a saturation control coil connected to flow a deflection current flowing through the second deflection coil, and a saturable core to which the impedance control coil is wound. And a saturable reactor for changing the current flowing through the first deflection coil into a differential operation in synchronization with the current flowing through the second deflection coil, wherein the saturation control coil is a first saturation control coil. And a second saturation control coil for generating a magnetic field of reverse polarity with respect to the first saturation control coil. At least one resistor is connected in series to form a first deflection ammeter, and a second deflection ammeter configured with a diode pair connected in reverse polarity with the second saturation control coil is connected in parallel with the first deflection ammeter. Deflection device for color water pipes. 2. A deflection apparatus for a color receiver tube according to claim 1, wherein a variable resistor is connected in parallel to said diode pair of said second deflection ammeter. The deflection apparatus for a color receiver tube according to claim 1, wherein a resistance or a variable resistor is connected in series to at least one diode of said diode pair of said second deflection ammeter. 2. The apparatus of claim 1, further comprising two pairs of subcoils for generating an auxiliary magnetic field in synchronization with a current flowing through the second deflection coil, wherein the second deflection ammeter includes one pair of subcoils of the two pairs of subcoils. A deflection device for a color water pipe, which is connected. An inline electron gun for generating a three electron beam comprising a center beam and a pair of side beams arranged in a first direction; A deflection yoke comprising a first deflection coil generating a magnetic field deflecting the three electron beams in the same direction as the first direction and a second deflection coil generating a magnetic field deflecting in a second direction perpendicular to the first direction; At least an impedance control coil connected to the first deflection coil, a saturation control coil connected to allow the deflection current flowing in the second deflection coil to flow, and a saturable core to which the impedance control coil is wound; A color water pipe device having a saturable reactor for differentially changing a current flowing through a deflection coil in synchronization with the second deflection current, wherein the saturation control coil is connected to the first saturation control coil and the first saturation control coil. A diode pair composed of a second saturation control coil for generating a magnetic field of reverse polarity with respect to said first saturation control coil, wherein at least a resistor is connected in series to form a first deflection ammeter and connected in reverse polarity with said second saturation control coil; And a second deflection ammeter configured in parallel with the first deflection ammeter.