KR100297533B1 - Deflection yoke - Google Patents

Abstract

The present invention seeks to improve the process of correcting misconvergence of color display tubes by attaching a correction chip to the deflection yoke. Since the deflection yoke has a separator with a pair of ribs on the platform of the separator to install the correction chip, the pair of ribs forms a multilayer structure. The correction chip is fitted to the lower layer of the multi-layer structure and the other correction chip is inserted to the upper layer of the multilayer structure. Since the two correction chips are held by the elastic force generated by the correction chip or the multilayer structure, or both, the correction chips do not fall out of the multilayer structure. Thus, all correction chips are easily placed in the desired position to correct misconvergence of the color display tube.

Description

Deflection yoke

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke for inline gun collar water pipes, in particular, a correction device for preventing misconvergence by attaching a magnetic chip.

1 to 5, a conventional misconvergence correction apparatus for a deflection yoke of the prior art will be described.

1 shows a deflection yoke for an inline gun collar water tube. The deflection yoke has a pair of separators 10 and 12. The pair of separators 10, 12 have a pair of necks, a pair of platforms 10a, 12a, and a pair of semiconical portions (not shown). The pair of platforms 10a, 12a are located near the gun of the collar water tube (not shown). A pair of vertical deflection coils 18, 18 ′ is provided in the pair of semiconical portions of the pair of separators 10, 12. A pair of magnetic cores 16, 16 ′ are provided on a pair of vertical deflection coils 18, 18 ′. The electronic circuit board 14 is provided along one of the half cones of the pair of separators 10 and 12. A pair of compensators 20, 20 'are formed on the platforms 10a, 12a, respectively. A pair of horizontal deflection coils (not shown) are provided below the separators 10, 12.

2 is a perspective view showing one of the correction devices 20, 20 '. Each of the pair of compensators 20, 20 'comprises a pair of L-shaped ribs 22, 24 facing each other and a pair of semi-cylindrical ribs 26, 28 provided along the L-shaped ribs 22, 24. Have The correction chip 30 is made of a paramagnetic material and has a tab 32. The compensation chip 30 is pressed between the L-shaped ribs 22 and 24 and can be slid over the pair of semi-cylindrical ribs 26 and 28. The correction chip 30 may be moved by a finger that grips the tab 32. 3 is a cross-sectional view showing one of a pair of correction devices 20, 20 'cut along the lines # 12- # 12 of FIG. 2 and provided with a correction chip 30. FIG. The correction chip 30 can be slid but not freely positioned in the pair of L-shaped ribs 22, 24.

4A-4D show a method of correcting misconvergence that appears on the screen of a color receiver tube in relation to the position of the correction chip 30. FIG. In Figure 4A, the bluewoo beam is located outside the red beam. This is called H-shift misconvergence caused by the positional deviation between the center of the in-line gun and the center of the magnetic field generated by the deflection yoke. In this case, the correction chip 30 is located on the side near the blue gun to offset the deviation between the blue beam and the red beam, as shown in Fig. 4B. In Fig. 4C, the bluewoo beam is located inside the red beam, and then the correction chip 30 is located on the side adjacent to the red gun as shown in Fig. 4D. The displacement amount of the beam position is adjusted by moving the correction chip 30, as indicated by the arrow F10 or F12.

As described above, the pair of correction devices 20, 20 'can slide the correction chip 30 along the radial direction of the separators 10, 12, and keep the correction chip 30 at the desired position. Requires configuration. In the conventional method, the pair of L-shaped ribs 22 and 24 are arranged parallel to the radial direction of the separators 10 and 12 to slide the correction chip 30. The pair of L-shaped ribs 22 and 24 and the pair of semi-cylindrical ribs 26 and 28 are formed so as to hold the correction chip 30 properly by having small spaces 22A and 24A (FIG. 3). . The length of the pair of semi-cylindrical ribs 26, 28 is made shorter than the length of the pair of L-shaped ribs 22, 24 so that a molding die for the separators 10, 12 can be manufactured. Such correction devices 20, 20 'are described in Japanese Laid-Open Publication Nos. 63-44364 and 63-19753 in 1988.

In the manufacture of the deflection yoke, each deflection yoke is pre-adjusted using a flattened display tube (not shown) as described before referring to FIGS. 4A and 4B. In the manufacture of color display devices, the pre-adjusted deflection yoke is mounted on a display tube different from the standard display tube. It is often the case that the mechanical or electrical properties differ between the production tube and the standard tube of a color display device. In this case, additional adjustment to correct misconvergence is necessary. An additional correction chip 34 is used to correct misconvergence, as shown in FIG. 5, which chip 34 is fixed on the L-shaped ribs 22, 24 by the adhesive 36. As shown in FIG. As shown in Fig. 5, an additional correction chip 3 $ may overlap the correction chip 30 for correction.

The conventional misconvergence correction method described above has the following disadvantages.

The additional calibration chip 34 cannot be temporarily held in the desired position before applying the adhesive 36.

While the adhesive 36 is cured, the additional calibration chip 34 tends to move out of its installed position.

The additional correction chip 34 is slippery at its desired position and cannot be held temporarily, so that the additional correction chip 34 is difficult to position correctly.

The additional correction chip 34 is held on the L-shaped ribs 22 and 24 only by the adhesive 36, so that the additional correction chip 34 may fall off.

The general object of the present invention is to solve the above-mentioned problems of the prior art. Another object of the present invention is to improve the installation and position control process of the misconvergence correction chip on the deflection yoke, thereby improving the accuracy of the correction.

It is still another object of the present invention to provide a separator having a platform, a pair of ribs having a plurality of spaces for holding a plurality of correction chips and being properly spaced apart from each other, and a pair of ribs and correction chips. A deflection yoke is provided by a pair of ribs by an elastic force generated by at least one of the deflection yokes and including a correction chip for correcting misconvergence of a color display tube.

1 is a perspective view of a deflection yoke of the prior art;

Fig. 2 shows a part of the prior art shown in Fig. 1;

3 is a sectional view of the portion shown in FIG.

4A to 4D show a step of adjusting the deflection yoke of the prior art.

Figure 5 shows a part of the prior art with a correction chip.

6 is a perspective view of an essential part of the deflection yoke of the first embodiment of the present invention;

7A to 7C are cross-sectional views of essential parts of the first embodiment of the present invention.

8A to 8D are cross-sectional views of principal parts of a second embodiment of the present invention.

9A to 9C are other cross-sectional views of main parts of the second embodiment of the present invention.

10A to 10C are cross-sectional views of principal parts of a third embodiment of the present invention.

11A and 11B are sectional views of essential parts of a fourth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10, 12: separator 14: substrate

30, 37: correction chip 32: tab

42, 43: upper channel 44, 45: lower channel

The present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals and numbers are used for like parts used in the above-mentioned prior art.

First Embodiment

6 is a partial perspective view of a deflection yoke of the first embodiment of the present invention.

7A to 7C are cross-sectional views of principal parts of the first embodiment of the present invention.

As shown in Fig. 6, the pair of L-shaped ribs 40 and 41 of the double-deck structure are formed on the platforms 10a and 12a which extend along the diameter line AX of the deflection yoke and are separated from each other. do. 6 to 11B, only the platform 10a of the two platforms 10a and 12a is shown for simplicity of illustration, and the illustration of the platform 12a is omitted. A pair of semicylindrical ribs 26 and 28 are formed therebetween along the pair of L-shaped ribs 40 and 41.

The correction chip 30 is made of magnetic material and has a tab 32. The correction chip 30 is sandwiched between the lower channels 44 and 45 of the L-shaped ribs 40 and 41 and slid on the semi-cylindrical ribs 26 and 28.

The additionally used correction chip 37 is also made of magnetic material and has a tab 38. The correction chip 37 is sandwiched between the upper channels 42 and 43 of the L-shaped ribs 40 and 41 and can be slid on the floor surface of the upper channels 42 and 43.

Each position of the calibration chip 30, 37 may be moved by a finger that grips each tab 32, 38.

FIG. 7A is a cross-sectional view when the pair of L-shaped ribs 40, 41 provided with the correction chips 30, 37 and the platform 10a are cut together along the cutting lines # A- # A (shown in FIG. 6). . In Fig. 7A, the correction chip 30 is sandwiched between the lower channels 44 and 45, and the correction chip 37 is sandwiched between the upper channels 42 and 43. In FIG. The upper channels 42 and 43 are composed of floor surfaces 44a and 45a and ceiling surfaces 42b and 43b.

As described above, the correction chip 37 is sandwiched between the upper channels 42 and 43 of the L-shaped ribs 40 and 41 having the floor surfaces 44a and 45a and the ceiling surfaces 42b and 43b. Similarly, the correction chip 30 is sandwiched between the surfaces on the platforms 10a and 12a and the lower channels 44 and 45 of the L-shaped ribs 40 and 41 having the surfaces 44b and 45b. The L-shaped ribs 40 and 41 are formed on the platform 10a, have a predetermined space therebetween, and extend along the diameter line AX of the deflection yoke.

In this case, the thickness of the correction chip 37 is equal to the channel gap "h" of the groove, which is a space formed between the floor surfaces 44a and 45a and the ceiling surfaces 42b and 45b.

In FIG. 7A, the width of the correction chip 30 is almost equal to the width of the correction chip 37. In FIG.

FIG. 7B shows the case where the width of the correction chip 30 is larger than the width of the correction chip 37 (L ₂ > L ₁ ). In this case, the upper channels 42, 43 are displaced from the lower channels 44, 45.

7C shows the case where the width of the correction chip 30 is smaller than the width of the correction chip 37 (L ₂ <L ₁ ). In this case, the upper channels 42 and 43 and the lower channels 44 and 45 are formed separately.

In this embodiment, the desired position of the correction chip 37 is more stably positioned by the L-shaped ribs 40 and 41 than in the case of the conventional method in which the depression of the correction chip is visually placed. The correction chip 37 is held by the L-shaped ribs 40 and 41 and does not fall off even without using an adhesive. Therefore, the deflection yoke of this embodiment improves the accuracy in the manufacturing process of attaching the correction chip.

Second Embodiment

8A to 8D are sectional views of principal parts of a second embodiment of the present invention.

9A to 9C are other sectional views of the main parts of the second embodiment of the present invention.

A method of holding a correcting chip by using an elastic rib is shown in the second embodiment. Thereafter, the projections 48c, 49c, 148c, and 149c are not bent at the time of insertion of the correction chip 37 for the convenience of explanation.

In the present embodiment, the correction chip 37 is sandwiched between the upper channels 46 and 47 of the L-shaped ribs 40 and 41 having the floor surfaces 48a and 49a and the ceiling surfaces 46b and 47b. Similarly, the correction chip 30 is sandwiched between the surface of the platform 10a and the lower channels 48, 49 of the L-shaped ribs 40, 41 having the surfaces 48b, 49b. The L-shaped ribs 40 and 41 are formed on the platform 10a, have a predetermined space therebetween, and extend along the diameter line AX of the deflection yoke.

As shown in Fig. 8A, the upper protrusions 46c and 47c have protrusions 46d and 47d at their ends. The channel cap "h" between the extended surfaces of the floor surfaces 48a and 49a and the projections 46d and 47d is smaller than the minimum thickness t _min of the correction chip 37. As a result, the projections 46d and 47d come into contact with the correction chip 37. The projections 46d and 47d are pushed by the correction chip 37 by a distance of th (t is the average thickness of the correction chip 37). By selecting the proper length ("1a") and thickness "ta" of the upper protrusions 46c and 47c, the upper protrusions 46c and 47c are bent and the desired force Fa pressing down the correction chip 37. ). As a result, despite the dimensional tolerances of the associated parts, the correction chip 37 is firmly held between the L-shaped ribs 40 and 41. Moreover, the correction chip 37 can be moved smoothly to the optimum position.

When the correction chip 37 is solid, since the deformation of the correction chip 37 does not occur, the correction magnetic field does not change, and the misconvergence correction process is stably executed.

Fig. 8C shows L-shaped ribs 40, 41, with each floor surface 48a, 49a having projections 48d, 49d thereon. The position of the projections 48d and 49d may be at the ends or the middle of the floor surfaces 48a and 49a.

8D shows L-shaped ribs 40, 41 of FIG. 8C with a correction chip 37 installed. As shown in Fig. 8D, the correction chip 37 is supported by the projections 46d, 47d, 48d, and 49d. Since the contact area between the projections 46d, 47d, 48d, 49d and the correction chip 37 is small, the correction chip 37 is supported more stably. In the manufacture of molding dies for the separators 10 and 12, the molding die needs to be changed by correcting the channel gap "h". The channel gap " h " is changed by correcting the heights of the projections 46d, 47d, 48d, and 49d. This correction process is easier than correcting the surface such as the plane of the projections 46c, 47c, 48c, 49c.

9A-9C, a pair of ribs 140, 141 of the " U " shape is shown. As shown in Figure 9A, ribs 140 and 141 have upper protrusions 146c and 147c and lower protrusions 148c and 149c. The channel gap "h" is provided as described before referring to Figure 8A. By providing the appropriate thickness and channel gap " h " to the ribs 140, 141, the ribs 140, 141 grip the compensation chip 37 stably.

9B and 9C show ribs 140 and 141 with upper channels 142 and 143 aligned with lower channels 144 and 145. FIGS.

In the above, the protrusions 48c, 49c, 148c, and 149c are considered to have sufficient rigidity with respect to the insertion stress of the correction chip 37. However, the projections 48c, 49c, 148c, and 149c can be bent as long as the correction chip 37 is firmly held.

Third Embodiment

10A to 10C are sectional views of essential parts of the third embodiment of the present invention.

A method of holding a correction chip by using a correction chip having elasticity is shown in the third embodiment.

In this embodiment, the correction chip 37 having a small depth J (see Fig. 6) and / or a small thickness is elastic.

As shown in Fig. 10A, the pair of ribs 240 and 241 of the "L" shape has a pair of upper protrusions 46 and 47 having a short length and a pair of lower protrusions longer than the upper protrusions 46 and 47 in length. (48c, 49c).

A channel gap "h" space is provided between the protrusions 48d and 49d and the upper protrusions 46 and 47 formed on the lower protrusions 48c and 49c.

When the channel gap "h" is smaller than the minimum thickness t _{min of the} correction chip 37, the correction chip 37 is bent as shown in Fig. 10B. As a result, the correction chip 37 is held in place by the ribs 240 and 241 in spite of any change in the gap of the channel gap "h" and the thickness of the correction chip 37. Because of this configuration, the correction chip 37 can be moved smoothly.

10C shows another configuration of a pair of ribs 240, 241 having a pair of upper protrusions 46c, 47c longer than the pair of protrusions 48c, 49c. The correction chip 37 is bent and held firmly by the pair of ribs 240 and 241.

Another configuration of the pair of ribs 240, 241 is that the two projections 46, 47: 48c, 49c have projections 48d, 49d (FIGS. 10A and 10B); 46d, 47d, (FIG. 10C), respectively. will be.

In this embodiment, the ribs 240, 241 may have sufficient rigidity to mount other components.

Fourth Embodiment

11A and 11B are sectional views of principal parts of a fourth embodiment of the present invention.

In the fourth embodiment, the correction chip 37 is maintained using the flexibility of the ribs 340 and 341 and the correction chip 37.

The method shown in FIG. 11A is a variation of the method shown in FIG. 10C in which the projections 46 and 47 are elastic.

Another method shown in FIG. 11B is a variation of the method shown in FIG. 10B without the correction chip 30. In Fig. 11B, the projections 48c and 49c are thinner and longer than the projections 46 and 47. In this case, since the protrusions 48c and 49c and the correction chip 37 are elastic, the correction chip 37 can be firmly held and can be slid smoothly.

Other embodiments may be made as described below.

The pair of ribs are formed parallel to the platform 10a but extend in a direction different from the diameter line AX of the deflection yoke in accordance with a desired correction magnetic field.

The pair of ribs is formed on one or more platforms 10a, 12a.

The pair of ribs is formed at the rear of the platforms 10a and 12a.

The shape of the ribs can be varied in cross section such as "V" or "U".

A plurality of pairs of ribs may be formed on the platforms 10a and 12a.

It may be provided in a multi-layer rib structure such as three or more layer lights.

The above-described correction chips 30 and 37 may be made of a magnetic material having high magnetism such as steel, a magnetic alloy, and an amorphous magnetic material.

Embodiments of the present invention have the following advantages.

The plurality of correction chips can be slid and can be firmly held by a pair of ribs. Therefore, the correction chip of the present invention is accurately determined in position, and kept in close contact without falling off of the ribs. Therefore, the deflection yoke of the present invention improves the manufacturing process and the positional accuracy of the correction chip. On the other hand, conventional calibration chips often need to be refitted by trial and error until they find the optimal position.

Another advantage of the present invention is that the correction chip is firmly held and slid with a moderate force since the correction chip is held by the elasticity of the correction chip and / or ribs.

Claims (2)

In a deflection yoke comprising a pair of separators having platform means, Disposed on the platform means and extending in parallel, the holding means for holding a misconvergence correction chip; The holding means is made of a multilayer structure having channels separated from each other at predetermined intervals, And a misconvergence correction chip for correcting misconvergence of the color display tube by adjusting the magnetic field of the deflection yoke, And the misconvergence correction chip is held in one or more of the channels by at least one elastic force generated by the channel and an elastic force generated by the misconvergence correction chip. In a deflection yoke comprising a pair of separators having platform means, Disposed on the platform means and extending in parallel and comprising retaining means for retaining the part, The retaining means is a deflection yoke, characterized in that the multi-layer structure having a channel separated from each other at a predetermined interval.