KR20030028852A - Center Purity Magnet for Brauntube - Google Patents

Abstract

PURPOSE: An electron beam correcting magnet for a cathode ray tube is provided to achieve improved degree of freedom in designing the deflection yoke, while allowing for ease of adjustment of the magnet assembly mounted to the cathode ray tube. CONSTITUTION: A cathode ray tube comprises an electron gun; a funnel supporting the outer surface of the electron gun; a panel coupled to the funnel so as to maintain a vacuum state; a phosphor screen formed at the inner surface of the panel; a shadow mask for performing color discrimination; a deflection yoke mounted on the funnel so as to deflect electron beams emitted from the electron gun; and a magnet assembly(110) for correcting deviation of electron beams. The magnet assembly includes a first magnet(111) formed into a circular shape, and a second magnet(112) arranged at the outer surface of the first magnet, and which is formed into a circular shape having a predetermined diameter relative to the outer diameter of the first magnet.

Description

CRT Electron Beam Correction Magnet {Center Purity Magnet for Brauntube}

The present invention relates to a center purity magnet for correcting the positional misalignment of an electron beam, which may appear when an electron gun is assembled or when an electron gun is installed in a CRT. Assembling position in the longitudinal direction of the deflection yoke by disposing two assembling members of a first magnet and a second magnet formed in a circular shape having a predetermined level in relation to the outer diameter of the first magnet, outside the first magnet. It is possible to secure the design freedom of the deflection yoke by making it possible to secure the short, and when the magnet assembly is directly installed on the deflection yoke, it is easy to secure the space, and the controllability is greatly improved when adjusting the installation to the CRT. CRT electron beam correction to improve productivity and increase productivity It relates to the net.

Conventional CRT (1) is a screen made of phosphors of red, blue, green and BM (black matrix) on the inner surface of the panel (2) based on the panel (2) and funnel (3) to make the interior of the vacuum space (4) with a shadow mask (6), which acts as a color selection electrode, so that the electron beam (5) emitted from the electron gun (9) can reach a predetermined position, and supports the shadow mask (6) simultaneously from external impact It is composed of a frame (7) for protecting and maintaining a fixed position, the inner shield (8) mainly connected to the frame (7) and serves to shield the external magnetic field, and the funnel (3) ), A deflection yoke 10 for deflecting the electron beam 5 emitted from the electron gun 9 to a predetermined position is installed, and the assembly of the electron gun 9 at the point where the electron gun 9 on the rear thereof is located. Error or electron gun (9) Round tube 1 shown assembled error electron beam (5) departing from the center position purity magnet (Magnet Purity Center) for a correction cycle to the by installing a is an installation (11, hereinafter referred to as 'As M').

2 is a front view (a) and a side view (b) showing a schematic configuration of the CPM according to the prior art, Figure 3 is a front view (A diagram) showing the polarity and location of the CPM according to the prior art. And side view (b degree)

As shown in Figs. 1 to 3, these CPMs 11 are mostly bipolar magnets and red and blue magnets that create a two-pole magnetic field to move the three electron beams 5 of red, blue and green as a whole. It consists of a set of four-pole magnets to compensate for misalignment of the outer electron beam, and a pair of six-pole magnets to compensate for misalignment of the red and blue outer electron beams and the green central electron beam. The magnetic sheet is placed in the screen-side space of the screen), the electron beam position on the screen is checked, and a suitable magnetic field is magnetized. Alternatively, the magnetic sheet may be replaced with the external SIPM 11 described above. It is also possible to fix it in place and magnetize the appropriate magnetic field.

Looking at the operation state of the position shift correction of the electron beam 5 by the CPM 11 of the conventional art described above, the operation is performed in the following principle,

First, in the case of a 2-pole magnet, when the magnetic field lines are uniformly applied from left to right in the moving space of the electron beam 5, the three electron beams 5 of red, green, and blue are equally left. Will move.

Of course, when the magnetic force line 100 is positioned to the left and right, it can be moved to the left or right. In addition, the magnetic flux density of the applied magnetic force line, that is, the magnetic field strength, is controlled by adjusting the applied position by using magnets magnetized in opposite directions having two similar magnetic flux densities.

In the case of the four-pole magnet, the relative positions of the red and blue beams, which are the outer electron beams, are adjusted by forming a magnetic field line as shown in FIG.

In other words, the red and blue electron beams located on the left and right sides experience magnetic fields in opposite directions, so if one moves upwards, it moves downward, and if it moves rightwards, it moves leftwards to adjust the position shift. In this case, the green beam in the center is located at the center of the line of magnetic force so that the magnetic fields on the left and right sides or the top and bottom sides cancel each other to prevent the force.

The same principle can be used for 6-pole magnets when the red and blue electron beams must be moved in the same direction, or the red and blue electron beams must be moved upward or downward, and the green electron beam must be moved differently downward or upward. You can use it if you can.

In the conventional art, the CPM 11 for the CRT adopts a method of providing a difference in polarity along the moving direction of the electron beam (see FIG. 3) to adjust the magnet magnetization amount before and after to finely adjust the polarity to different polarities. It was adjusted to make a difference, and the installation thickness (t) had to be given in the longitudinal direction, which caused a disadvantage of taking up a lot of space in the axial running direction.

In addition, it is not easy to change the position of the magnetic poles of the magnets having different positions in the two axial traveling directions, that is, the magnetic flux density is not easy to change the overall control position, the workability is worse.

And the same as described above, but in some cases in the case of providing a magnet of two poles or four poles in the deflection yoke (10) to correct the position after the electron beam (5) from the electron gun in particular the SIPM (11) ) Is very important due to the limitation of the installation space of the deflection yoke 10. In general, when the two poles and the four poles of SIMP 11 are installed in the neck portion of the deflection yoke 10, the thickness t is increased. A space of about 5 mm must be secured.

Of course, this acts as a design limiting element of the deflection yoke 10, and the shorter the thickness t of the CPM is, the higher the design freedom of the deflection yoke 10 becomes.

The present invention has been made to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a center purity magnet, that is, CPM, for correcting a positional shift of an electron beam which may appear when an electron gun is assembled or an electron gun is mounted in a CRT tube

A pair comprising two assembly members of a first magnet formed in a circular shape provided inside, and a second magnet formed in a circular shape having a predetermined level with respect to an outer diameter of the first magnet outside the first magnet. By placing the magnet assembly at the same position, rather than at another position on the axis of movement of the electron beam,

The design position of the deflection yoke can be secured by occupying the assembly position shortly in the longitudinal direction of the deflection yoke.

When the magnet assembly is installed directly on the deflection yoke, space is easily secured.

The magnet assembly is installed in the CRT and the adjustment thereof is remarkably improved, and thus the workability is improved to provide a CRT electron beam correction magnet to improve productivity.

1 is a schematic configuration diagram of a conventional CRT.

2 is a schematic configuration diagram of a CPM of the prior art,

(a) front view,

(b) FIG.

Figure 3 is an explanatory view showing the simplicity polarity and location in accordance with the prior art.

(a) front view,

(b) FIG.

Figure 4 is a schematic view showing the configuration of an embodiment according to the present invention,

(a) front view,

(b) FIG.

Figure 5 is a front configuration diagram of a two-pole magnet assembly of one embodiment according to the present invention.

Figure 6 is a front configuration diagram of a four-pole magnet assembly of one embodiment according to the present invention.

7 is a front configuration diagram of the six-pole magnet assembly of one embodiment according to the present invention.

8 is a reference diagram of magnetic field lines formed by a two-pole magnet assembly in accordance with an embodiment of the present invention.

9 is a reference diagram of magnetic field lines formed by a four-pole magnet assembly in accordance with an embodiment of the present invention.

10 is a configuration diagram of another embodiment of the adjusting knob of the magnet assembly according to the present invention;

(a) front view,

(b) FIG.

Fig. 11 is an explanatory diagram showing an example of electron beam movement by a magnetic field of a two-pole magnet assembly.

12 is an explanatory diagram showing an example of electron beam movement by a magnetic field of a four-pole magnet assembly;

* Explanation of symbols for the main parts of the drawings

1: CRT 2: Panel

3: funnel 4: screen

5: electron beam 6: shadow mask

7: frame 8; Inner shield

9: electron gun 10: deflection yoke

11: CIPM of the prior art

100: magnetic field line

110: magnet assembly according to the present invention

111: first magnet according to the present invention

112: second magnet according to the invention

113: handle for adjusting the first magnet

114; 2nd magnet adjustment knob

115: uneven coupling portion

The CRT electron beam correction magnet according to the present invention for achieving the above object,

A funnel to maintain the vacuum while supporting the electron gun radiating the electron beam and the outer surface of the electron gun, a panel to combine with the funnel to maintain the vacuum, phosphors of red, green, blue on the inner surface of the panel and a black matrix A screen which is made, a shadow mask which serves as a color screening device for directing the electron beam to a position on a predetermined screen, a deflection yoke installed at a cone of the funnel to deflect the electron beam emitted from the electron gun to a predetermined point on the screen, the electron gun In the CRT including a CPM, which is a magnet assembly installed to compensate for the deviation of the electron beam at a predetermined position due to the combination of the CRT and the CRT,

CPM which is the magnet assembly comprises: a first magnet formed in a circular shape provided inside;

And a pair of magnet assemblies configured to include two assembling members of a second magnet, which are formed in a circular shape having a predetermined level with respect to the outer diameter of the first magnet, outside the first magnet. .

In one embodiment according to the invention,

When the inner first magnet used in the magnet assembly and the second magnet outside thereof make a relative position with a predetermined portion, for example, when the adjustment knob overlaps to make the relative position,

It is preferable that the first magnet and the second magnet are permanently magnetized so that the lines of magnetic force formed in the motion space of the electron beam cancel each other so as not to change the traveling direction of the electron beam.

As another embodiment according to the present invention,

The magnet assembly member of the magnet assembly is provided with a position adjusting knob, respectively, the adjustment knob provided on the first magnet installed inside has an opposite portion passing through the circular body portion of the second magnet, the position of each magnet assembly member Or it is preferable to be configured to be free to move without being in close contact with each other to adjust the characteristics.

In one embodiment according to the invention,

The magnet assembly, the position adjustment knob of the first magnet installed on the inside has an opposing portion passing through the circular body portion of the second magnet, when the first magnet and the second when the adjustment by overlapping by applying an external force A predetermined portion of the second magnet circular body portion and an opposing portion of the adjusting knob of the first magnet may be provided with an uneven portion so that the magnet of the same can be adjusted at the same time.

In one embodiment of the present invention,

The magnet assembly CPM has two assemblies, a first magnet formed in a circular shape provided inside, and a second magnet formed in a circular shape having a predetermined level with respect to an outer diameter of the first magnet outside the first magnet. The member is preferably used by combining three pairs of forming a two-pole magnetic field, forming a four-pole magnetic field, and forming a six-pole magnetic field.

In one embodiment of the present invention,

The magnet assembly CPM has two assemblies, a first magnet formed in a circular shape provided inside, and a second magnet formed in a circular shape having a predetermined level with respect to an outer diameter of the first magnet outside the first magnet. It is preferable to be a magnet assembly including members, and to be installed on the neck side of the deflection yoke.

Hereinafter, an embodiment of the CRT electron beam correction magnet of the present invention will be described in more detail with reference to the accompanying drawings.

4 is a front view (a) and a side view (b) showing a schematic configuration of the magnet tube 110 for adjusting the cathode ray tube electron beam according to an embodiment of the present invention.

As shown in FIG. 4, the CRT magnet assembly 110 for adjusting the electron beam according to the present invention includes a funnel for supporting an electron gun 9 emitting an electron beam and an outer surface of the electron gun 9 while maintaining a vacuum. 3) a panel (2) coupled with the funnel (3) to maintain a vacuum, a screen (4) made of red, green and blue phosphors and a black matrix on the inner surface of the panel (2), and the electron beam (5) Shadow mask 6, which serves as color screening, so that the electron beam emitted from the electron gun 9 can be deflected to a predetermined point on the screen 4 so that the? 3) a deflection yoke (10) installed in the cone portion of the sipe, a magnet assembly installed to compensate for the deviation of the electron beam (5) at a predetermined position due to the coupling of the electron gun (9) and the CRT (1) or other causes In the cathode-ray tube (1) containing 11 or the like,

The magnet assembly CPM has a first magnet (111) formed in a circular shape provided inside;

A pair of magnet assemblies 110 including two assembling members of a second magnet 112 formed in a circular shape having a predetermined level compared to an outer diameter of the first magnet 111, outside the first magnet. It was configured to include, and was placed in the same position, rather than another position on the axis of movement of the electron beam.

In the CRT magnet assembly 110 for adjusting the electron beam according to the present invention, each of the handles 113 and 114 has a structure in which a first magnet 111 is located inside and a second magnet 112 is located outside. They are designed to generate magnetic fields that cancel each other's magnetized state at overlapping positions.

For example, if the first magnet 111 is magnetized to two poles and the handle is overlapped, the upper side is magnetized to the N pole and the lower side is magnetized to the S pole, while the handle of the second magnet 112 is overlapped. This S-pole and the lower side magnetize to the N-pole.

Thus, the first and second magnets 111 and 112 are paired to form two poles as shown in FIG. 5, four poles as shown in FIG. 6, and six poles as shown in FIG. By assembling to configure the magnet assembly 110 was applied to the CRT (1).

In addition, even when the magnets of the two poles and four poles are configured in the deflection yoke 10, the magnet assembly 110 of the present invention was installed in the neck portion of the deflection yoke 10.

The magnet assembly members 111 and 112 of the magnet assembly 110 according to the present invention are provided with position adjusting knobs 113 and 114, respectively, and adjustment knobs provided to the first magnets 111 installed therein ( 113 has an opposite portion passing through the circular body portion of the second magnet 112, it can move freely without being in close contact with each other to adjust the position or characteristics of each magnet assembly member (111, 112). Configured to be the default configuration,

As another embodiment according to the present invention, as shown in Figure 10, by forming an uneven coupling portion facing the control knob 113 and the second magnet 112 of the first magnet 111 of the magnet assembly When pressed, it can be configured to move simultaneously without changing the position.

The operation state of the present invention having the above-described configuration will be described with reference to the magnetic field lines formed by the two-pole magnet assembly according to the present invention shown in FIG. 8 and the magnetic field lines formed by the four-pole magnet assembly according to the present invention shown in FIG. 9. see.

The magnet assembly 110 of the present invention applies a predetermined level of magnetic force to the first magnet 111 configured on the inner side to make it manageable in the area where the electron beam passes, and on the second magnet 112 configured on the outer side of the magnet assembly 110. The magnetic force is applied to the area through which the electron beam passes, so that the magnetic force of the first magnet 111 can be made, and when overlapping, the magnetic force of each other is canceled out so that they do not act. It allows us to adjust our influence.

In operation, the method in which the magnetic force acts on the electron beam 5 is the same as the conventional method.

That is, in the case of a two-pole magnet, when the magnetic force line 100 is uniformly applied from the left to the right in the moving space of the electron beam as shown in FIG. 11, the three electron beams 5 of red, green, and blue are moved downward in the same manner. .

Of course, when the magnetic force line 100 is positioned up and down, it can be moved to the left or right.

In the case of the 4-pole magnet, the relative position of the red and blue beams, which are the outer electron beams, is adjusted by forming the magnetic force line 100 as shown in FIG.

That is, the red and blue electron beams 50 located on the left and right sides experience magnetic fields in opposite directions, so that when one moves upwards, the red and blue electron beams 50 move downward, and when moving leftwards, the left and right electron beams 50 are adjusted. Can do it,

In this case, the green beam at the center is located at the center of the line of magnetic force so that the magnetic fields on the left and right sides or the top and bottom sides cancel each other to prevent the force.

The same principle can be used for 6-pole magnets when the red and blue electron beams must be moved in the same direction, or the red and blue electron beams must be moved upwards or downwards, and the green electron beams must be moved downwards or upwards. You can use it if you can.

In addition, the present invention described above has a small installation space because the installation thickness (T) is short, thereby increasing the design freedom of the deflection yoke.

As those skilled in the art to which the present invention pertains, various changes, modifications, and changes can be made without departing from the technical spirit of the present invention. It is not.

As described in detail above, the CRT electron beam correction magnet according to the present invention includes a first magnet formed in a circular shape at the same position, rather than another position on a moving axis of the electron beam, and outside the first magnet. By disposing two assembly members of the second magnet formed in a circular shape having a predetermined level compared to the outer diameter of the first magnet,

By ensuring the short assembly position in the longitudinal direction of the deflection yoke, it is possible to secure the design freedom of the deflection yoke,

When the magnet assembly is installed directly on the deflection yoke, it is easy to secure space.

When the magnet assembly of the present invention is installed in the CRT and the adjustment is made, the controllability is greatly improved, and thus, the workability is improved, and thus the technology having the advantage of improving the productivity can be expected.

Claims (6)

Funnel (3) to maintain the vacuum while supporting the electron gun 9 and the outer surface of the electron gun (9) for emitting an electron beam, the panel (2) in combination with the funnel (3) to maintain the vacuum, A screen 4 made of red, green, and blue phosphors and a black matrix on the inner surface of the panel 2, and a shadow mask 6, which serves as a color screening device, so that the electron beam 5 can be sent to a position on a predetermined screen 4 ), A deflection yoke (10), an electron gun (9), and a cathode ray tube (1) installed in the cone of the funnel (3) to deflect the electron beam emitted from the electron gun (9) to a predetermined point on the screen (4). In the CRT (1) including a CPM (11), which is a magnet assembly that is installed to compensate for the deviation of the electron beam (5) at a predetermined position due to coupling or other causes of, The magnet assembly CPM has a first magnet (111) formed in a circular shape provided inside; Outside of the first magnet, of the second magnet 112 formed in a circular shape having a size of a predetermined level compared to the outer diameter of the first magnet 111 A CRT electron beam correction magnet comprising a pair of magnet assemblies comprising two assembly members. The method of claim 1, When the inner first magnet 111 used in the magnet assembly and the second magnet 112 outside thereof make a relative position with a predetermined portion, for example, when the adjustment knob overlaps to make the relative position, CRT electron beam correction magnets, characterized in that the first magnet 111 and the second magnet 112 is permanently magnetized so that the lines of magnetic force formed in the motion space of the electron beam cancel each other so as not to change the traveling direction of the electron beam. The method of claim 1, Positioning knobs 113 and 114 are respectively provided to the magnet assembly members of the magnet assembly 110, and the adjusting knobs 113 provided to the first magnets 111 installed therein are second magnets 112. It will have an opposite portion passing through the circular body portion of the CRT, characterized in that it is configured to move freely in close contact with each other in order to adjust the position or characteristics of each magnet assembly member (111, 112) The method of claim 1, The magnet assembly, the position adjusting knob 113 of the first magnet 111 installed on the inside has an opposite portion passing through the circular body portion of the second magnet, when the external force is applied to overlap the adjustment In order to simultaneously adjust the first magnet 111 and the second magnet 112, a predetermined portion of the second magnet circular body portion and an opposing portion of the adjusting knob 113 of the first magnet are provided with an uneven coupling portion ( And a CRT electron beam correction magnet. The method of claim 1, The magnet assembly CPM is formed of a first magnet 111 formed in a circular shape provided inside, and formed into a circular shape having a predetermined level with respect to an outer diameter of the first magnet 111 to the outside of the first magnet. CRT is used by combining two pairs of two magnets 112, forming a two-pole magnetic field, forming a four-pole magnetic field, and forming a six-pole magnetic field. Magnet. The method according to claim 1 or 2, The magnet assembly CPM is formed of a first magnet 111 formed in a circular shape provided inside, and formed into a circular shape having a predetermined level with respect to an outer diameter of the first magnet 111 to the outside of the first magnet. A magnet assembly comprising two assembly members of two magnets 112, CRT electron beam correction magnet, characterized in that installed on the neck side of the deflection yoke (10).