TW200409167A - Deflection yoke for cathode ray tube - Google Patents

Abstract

A deflection yoke for a cathode ray tube, with reduced weight and volume plus a low cost of manufacture is obtained by making a ferrite core housed in the deflection yoke very light and thin, based on an optimized design obtained through a number of experimental trials.

Description

200409167 V. Description of the invention (1) [Technical field to which the invention belongs] Related [001] The present invention relates to a cathode ray and an optimal t-rotation light weight obtained by multiple experimental tests, especially a ray tube deflection yoke, since 1 in The weight and volume of the cathode-to-magnet yoke based on six degrees and ten degrees are relatively light; therefore, it is extremely light, so it is [prior art] and has lower cost. my Figure 1 Explanation—The surname M of the prior art color cathode ray tube [003] This color cathode ray tube, "冓. On the front side of the vacuum tube, and a right hand A A screen is located on the neck of the other side of a tapered screen In this way: == a deflection yoke, which is located on the fluorescent screen and hits the fluorescent screen as' showing one. # The electron beam emitted is deflected and [0 0 4] as shown in Figure 1, Cai Xin is close to each other Sealed as one- ,: ί: Panel 1 and funnel 2 are in an empty state. —So the inside of cathode ray officer 11 is usually a fluorescent screen in the real bucket [Γ, 5] Λ with a glorious substance (or dishing agent). The 12 series is placed on the opposite side of the drain ^ Yang 1 The 3 series is housed in the neck of the funnel, located on the fluorescent screen i 2 * 0 6] in a predetermined space between the light screen 12 and the electronic grab 13, i. 4 Closer to the fluorescent screen 12, a yin 2n 0 for color selection is set on the same day. A deflection yoke 15 is set in the neck of the funnel to deflect the electron beam emitted from electricity < Ziyang 1 3 Rank work] The following explains how a color cathode ray tube having the above structure ^ i The electron beam 16 emitted by the electron grab 13 is deflected by the yoke 15 in the horizontal and vertical directions. / The vertically deflected electron beam 16 passes through the shadow mask 14 200409167 V. The electron beam through hole in the description of the invention (2) finally strikes the desired image shown in the front. 〇8] Figure 2 illustrates the structure of the deflection yoke in more detail. Deflection diagram Figure 2 'The deflection yoke 15 of the prior art includes a horizontal beam towards 2 deflection coils 22' An electronic coil coil capable of robbing electrons for emission = core 24 , Can make the horizontal and vertical low;-support 23, the loss in the return path can be reduced to the most accurate support horizontal and vertical deflection coils 21, 22, and ^ 25b 121 ^ 22 Γθ1 ^ ^ ^ ^ ^ ® 25a Yi, Xiao Guangqi Bell Knife; the top and bottom of the support 23 near the f-light screen side, the magnetic field generated in the fluorescent screen and the neck is leaked; * 4 ΐϊ 子 束 ΐ: ΐίHorizontal deflection coil 21 With the help of the terminal of the connection line and the compensation circuit at a predetermined position with far i Lt L, the 21 connection, the spring 26a, 26b connection eliminates the coil 25a, ⑽ and the horizontal deflection coil [〇〇１〇] Usually, the deflection yoke 15 allows a frequency of 1 5 75khz or current to flow to the horizontal deflection coil 21, and uses the output around this coil = "Electron beam cathode ray tube 16 inside of the helmet in the horizontal direction deflection. [0011] Meanwhile, the deflection yoke 15 allows electricity having a frequency of 60 Hz = the deflection coil 22 'and uses the electron beam inside the ray tube around the coil to deflect in a vertical direction. [0012] Therefore, when the deflection yoke 15 directs the electron beam 16 horizontally and toward the ## and converges them on a fluorescent screen, an image can be displayed. On the policy you page 7200409167 V. Description of the invention (3) [0 0 1 3] One of the recently developed deflection magnets is a self-converging type deflection yoke, which uses horizontal and vertical deflection coils 2 丨, 2 The surrounding non-uniform magnetic field causes the red (R), green (G), and blue (B) three-color electron beams 16 to converge on the light screen without using another individual circuit or device. [0 0 1 4] In other words, by adjusting the steering distribution of the horizontal and vertical deflection coils 2 and 1, the self-converging type deflection yoke generates one in each section (ie, the middle, the middle, and the neck). Drum or pincushion magnetic field; At the same time, although the mother and electron beams of the electron beam 16 have different starting and ending positions, the self-convergence type magnetic field vehicle allows each color electron beam & But converges at one point from different distances). [0015] The screen portion of this 4 'deflection yoke refers to the portion with a relatively large diameter cross section, and the neck portion indicates the glory screen; the side has a portion with a relatively small diameter cross section.幵 尤 幵 丨 Another [0 0 1 6] The middle part, as the name suggests, is the middle part of the neck. Think about it, it indicates that the fluorescent screen and [0017] the above definitions are also suitable for the support, and the strontium #Xi, Di Di corpse is used to deflect the magnetic concept, deflection coil, ϋ 端 铁 ... 先 屏 #, neck, The side of the glorious screen and the head [〇0 1 8] At the same time, the cathode ray control 1 is, if only the typical problem of horizontal and vertical deviation = =-and the vertical deflection coils 21, 22 produce 4 scoops of electricity μ > The IL is coiled and the horizontal sub-beam 16 is deflected over the entire screen. It is actually difficult to minimize the level of the iron core 2 4 with the electric coefficient. Generally, the loss of the magnetic field with a south conduction chirp on its return path is usually used. Efficiency and magnetics.

200409167 V. Description of the invention (4) [00 1 9] However, we can see that the neck of the fluorescent screen of the deflection yoke often not only generates a magnetic field that can deflect the electron beam in horizontal and vertical directions, but also generates unnecessary, Leaks of extremely harmful magnetic fields. [0020] Therefore, there is a need for a means capable of reducing leakage of a deflected magnetic field of a cathode ray tube. Specifically, it is necessary to keep the magnetic leakage generated around the cathode ray tube below a predetermined amount. Given that the range is from 5 至 ζ to 2kHz: (the bright band and the very low frequency (M) band between 2kHz and 4GGkHz, the low non-n 'so' means to reduce the magnetic field leakage is absolutely necessary. Zhifeng there are manufacturers Attempts have been made to increase the deflection yoke fluorescent screen section A :: 2, fi 1 ″ to obtain a high deflection angle and finally reduce the length of the cathode ray Lu Zhi, but it caused an increase in magnetic field leakage in vain. [0023] As mentioned before, Zeng Right Tonight, the total length of the cathode ray tube. The point set ... how to reduce the technology to obtain a high deflection angle '. However, in this item: exhibition :: flat === the radius and inclination of the screen; at the same time ... [0024] The top and bottom ends of the light-shielding portion that reduces the magnetic field leakage can be 'installed to eliminate two times', which can be from the end of the fluorescent screen 24 on the support 23 to the horizontal deflection circle. a, 25b, or increase the iron core (circles 25a, 2 旰) are attached to the support turn / car, the 'structure' of which the elimination line [.㈣] is technically Ϊ == end and bottom end. Suppressing the coils 25a, 25b Μ $ 4 sitting on the top of the fluorescent screen portion and the generated magnetic field 'can eliminate the magnetic field

I Page 9 200409167 V. Description of the invention (5) Leakage. [0 0 2 7] The elimination of the connection between the coils 2 5 a and 2 5 b and the horizontal deflection coil can make the magnetic field generated by the fluorescent screen portion of the horizontal deflection coil 21 leak, and the magnetic field generated in the elimination coils 25 a and 25 b The main deflection magnetic field generated by the horizontal deflection current is opposite, so the magnetic field leakage between the deflection yoke and the fluorescent screen and the neck is eliminated. [0 0 2 8] As mentioned above, if current is applied to the horizontal and vertical deflection coils 2 and 2 to generate a magnetic field so as to deflect the electron beam 6 to the entire screen, the magnetic field generated in this way is insufficient. To achieve this. Therefore, it is necessary to use an iron core 24 with a high magnetic permeability to minimize the loss of the magnetic field generated by the horizontal and vertical deflection coils 2 i, 2 2 on its return path, and improve the magnetic efficiency and magnetic force. w [0 0 2 9] In general, the iron core 24 having a high magnetic permeability is basically made of iron (F 0 3) and other additives (for example, ferrite, magnesium, etc.). [0 0 3 0] The iron core 24 used in cathode ray tube products has a large circular shape, but a rectangular iron core can also be used in order to enhance efficiency. Knife [〇〇31] Fig. 3 (a) shows a circular core 31, and Fig. 3 (b) shows a rectangular core [0 0 32] In fact, the thickness of the core and its placement position change the sensitivity and magnetic field leakage of the magnetic vehicle, Important matters when poor, households should set appropriate iron cores to make high-quality deflection yoke. ~ 、 / 思 [0 033] As mentioned before, the iron core 24 can eliminate the magnetic field poles ^ can improve the deflection efficiency of the deflection yoke and reduce the leakage of the magnetic field: so wrong, 24 often looks like a closed loop, enclosing Deflect the yoke. core

200409167 V. Description of the invention · (6) 'The iron core 24 should have a high magnetic permeability system so that the cathodic emission according to the prior art is generated due to eddy currents and [0034] To achieve the stated number of charges (/〇(e.g. Higher than 300) and any loss of high power ^. [0035] Despite the above-mentioned various wires, the / core 1 + force 'according to the prior art, deflection yoke core is still有 洗 # Various problems related to quality. There are cost, replacement, and volume. [0036] For example, most deflection cores have a thickness of 6 mm or more, and the wrong car / round / tapered iron is used. 8 or thicker. The diagonal corner thickness of the core is higher [〇〇37] However, if the core thickness is more than one part (that is, greater than the predetermined thickness), only the marginal “privacy” is necessary [ °°: Yi] Jian; No: You should n’t be damaged by corpses, but the JL system, the main Λ, 丄 + ^ turn yoke is very heavy and huge. In addition, deflection magnetism: two: j bias cost The cost is also higher than necessary. Lower yak, transporting [Content of the invention] η [0039] One of the objects of the present invention is at least Resolve the above points and provide at least the advantages described below, and / or lack [0 0 4 0] Therefore, 'one of the objects of the present invention is to improve the deflection of magnetic vehicles ... by substantially reducing the conventional iron core tube has a lower 'Weight and volume' without deteriorating its characteristics, with a view to [004 1] Another object of the present invention is to provide a cathode-to-magnetic yoke, in which, by performing most experiments, a radiant, quasi-e bias /, is better Thickness of iron Page 11 200409167 V. Description of the invention (7)-core, thus reducing manufacturing cost, volume, and reversing its deflection ability. /, Clothing costs, but not inferior [0 042] Another object of the present invention is to Provide a female rotating yoke: including a horizontal deflection coil, a vertical] deflection line :, a support and isolation of the horizontal and vertical deflection coils for books and Ambassador Am-can reduce the magnetic flux leakage and the volume is greatly reduced The characteristics and any structural problems that the large iron core and two iron cores may cause: the iron core, and the bay. [0 0 4 3] In order to achieve the foregoing and other cathode ray tubes, a panel, two, and two are provided. The present invention provides Grab, and-make electricity Grab the electric deflection of the launch: the electron beam yoke of the sub-beam includes a horizontal deflection coil, which can turn 7 yokes. The deflection, a vertical deflection coil, can deflect the electron beam in the horizontal direction of the moon. Can be supported and isolated The horizontal toilet ^ ::: deflection;-the support can reduce the horizontal and vertical deflection coils; and-the iron core, the magnetic flux. Among them, the leakage of the thickness of the iron core grid-the maximum thickness point and a minimum two: 6_, and if there is less than 3_ in the iron core......... ....... degrees of the day ... the maximum thickness point of the iron core is not [0044] the cathode emission provided by another aspect of the present invention, a funnel, an electron that emits an electron beam, Lu Tan has a The deflection yoke of the panel's electron beam deflection. Cough deviation can make the electron grab the emission circle, which can direct the electron beam toward the horizontal direction; = bracket-horizontal deflection line, the electron beam is deflected toward the vertical direction; a ^ :; 2 deflection coil, which can flat and vertical deflection coil; ^^ At the same time, the magnetic field generated by the water coil is isolated from the two & M horizontal and vertical deflection magnetic fluxes on the return path. Among them, the thickness of the iron core Page 12 20040916 / V. Description of the invention (8) The degree is less than 6mm, and there is a point in the iron core, and the maximum thickness of the iron core is two degrees: between-and the minimum thickness, where , U is the core length. Load ~, one end of the 4 side and 1/21 ^, one [leak °° bucket 45 弋: =;]: =: yin = jing "—the deflection magnetic vehicle of the panel's electron beam deflection. The partial" car package :! " = ::: The flat and vertical deflection coil iron pedestal can be: = = = this water-the magnetic vehicle placement part on which the magnetic roller is installed is placed on the inside; = = = magnetic = the cross section of the inner and outer surfaces of the placement part = = gradually? The shape is changed to non-circular; and the maximum of the core = thickness is between 3mm and 6mm. [...] [0046] Other advantages, objects, and features of the present invention include one of the following descriptions stating that some parts are understood by those with ordinary skills in this type of technology when examining or implementing the present invention. It is particularly pointed out in the scope that the various objects of the present invention can be achieved and obtained. [Embodiment] [0 0 5 6] The detailed description of a cathode ray tube deflection magnetic circuit according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. Beixin [0057] In general, the vertical inductance value of vertical deflection decreases with the thinning of the iron core ', and when the current is applied, the size of the chirped light screen will be slightly reduced. However, borrow

200409167 V. Description of the invention (9) ---- By reducing the thickness of the copper wire in the conventional deflection coil and increasing the number of coils, this problem can be easily solved without necessarily increasing the sensitivity of the deflection coil and increasing the manufacturing cost. [0 0 5 8] This emphasizes the need to develop technology to reduce the thickness of the core. [0 0 5 9] The main reason why cathode ray tube manufacturers do not mind using such a thick iron core is that the manufacturing cost of the iron core is insignificant when compared with the manufacturing cost of the usually large deflection yoke. ~ [0 0 6 0] However, many people now understand that low cost is a driving force for competitors in the cathode ray tube market. From this perspective, it is an urgent task to eliminate unnecessary production costs and develop cathode ray tubes with thin cores, reduced weight and volume, and simplify product transportation or handling. [0 0 6 1] Generally, it is generally believed that the weight of each core can reduce the manufacturing cost by 10%, and in this way, the price of each core can be reduced by 5%. However, if the core of the present invention is used, the core weight can be reduced by 30% or more. [0 0 6 2] If the iron core becomes thin, it is possible to reduce the magnetic field leakage generated in the deflection yoke (especially in the horizontal deflection coil). [0 0 6] In other words, if a thinner core than a conventional core is used, the number of coil elimination coils required to reduce the magnetic field leakage (VLMF) can also be reduced, and thus the manufacturing cost can be relatively reduced. , [〇 〇 6 4] In FIG. 4, '(a) is a schematic diagram showing the relative position of the horizontal deflection coil and the ❿ iron core. In the mountain [0 0 6 5], Lh indicates the length of the horizontal deflection coil from 0 to the side of the fluorescent screen, and 0 indicates the position of the end of the horizontal deflection coil on the neck side. Lf refers to the position from the end of the neck side of the iron core 24 (Lfs) to the side of the iron core 24 fluorescent screen

200409167 V. Description of the invention (10)-Length of the end position (Lff). [0 06 6] In order to make the iron core 24 thin, the ratio of Lh to Lf should also be optimized. First, make a conclusion based on the experiments performed (which will be described later). The range of Lf is from 0.1 ILh to 0.9Lh, and Lf is preferably not less than 35 mm and not more than 55 mm. [0 0 6 7] FIG. 4 (b) shows the theoretical background for calculating the thickness of the thin iron core of the present invention. [0060] As explained earlier, the main purpose of the present invention is to design an iron core with a minimum thickness. For this purpose, the method used is to determine the thickness based on the amount of magnetic flux inside the core.

[0 0 6 9] Assume that the inner diameter of the core is 2a, the outer diameter of the core is 2b, and the (straight) length from the neck of the core to its end is c. Then, the magnetic flux (0 i n) brought from the inner coil of the core into the core region and the saturation magnetic flux density (Bm) of the core have a relationship of 0 ln $. Among them, 0m =: c (b_a) Bm, which represents the highest magnetic flux density of the iron core. ', [0 0 70] Since (b — a) in the equation corresponds to the thickness of the core of seven, the above equation can be rewritten as t ^ [(0in) / (Bm. Once [007 1], therefore, the The optimal thickness can be obtained based on the relationship between the core thickness, the magnetic back, and the length of the neck side of the core.

[0 072] For example, in the present invention, the most widely used current = medium-thick 8-thick iron core is used as a test to obtain iron. In order to perform the test, the iron core has been modified in various ways and checked for more changes. [0073] Generally, the deflection yoke and the monitor of a television have the same deflection angle if their respective cathode ray tubes have the same deflection angle in the yoke and the oblate yoke.

200409167 V. Description of the invention (11) The yoke has almost the same magnetic field inside. [0 0 7 4] Of course, the methods of adjusting (or changing) the magnetic field strength are different. However, from the perspective of the magnetic field only, the magnitudes of the magnetic fields generated by the coils in one of the two devices are not so different from each other, and if the cores with the same magnetic field have the same structure and position, they will perform the same jobs. The basic issue is whether the cores have the same magnetic field strength. [0 0 7] In short, although the experiment of the present invention uses only the iron core of the monitor deflection yoke, the iron core of the television deflection yoke can also be used. [0 0 7 6] In addition, the cross section of the inner surface of the yoke placement part on which the yoke is installed, or the cross section of the inner and outer surfaces thereof, is gradually changed from circular to φ from the neck side to the fluorescent screen side. Non-circular, or it can remain circular. [0 0 7 7] FIG. 5 is a sectional view showing the thickness of the iron core according to the present invention: FIG. 6 is a perspective view showing the thickness and inner diameter of one end of the core neck. [0 0 78] FIG. 5 (a) shows the thickness Tn of the iron core 24 at one end of the neck side, the different thicknesses 11, 12, 13, ... t η of the iron core toward the fluorescent screen side, and the core length Lf, And the diameter Dn of the end of the neck side of the core. [0079] FIG. 5 (b) shows the cross section of the circular iron core 52 and its thickness t1, t2, t3, ..., tn; FIG. 5 (c) shows the cross section of the rectangular iron core 53 and its thickness 11, 12, 13, ..., t η 〇 [0 0 8 0] FIG. 6 is a three-dimensional appearance view of a circular iron core 61. The definitions of Tn and Dn in Figure 5 (a) also apply here. [0 0 8 1] As mentioned previously, the experiment of the present invention uses a 6.8 mm thick iron core, and in each observation, its thickness is gradually reduced by 0.5 m m. This process continues until the core thickness is 3.5 mm thinner than the original sample.

Page 16 200409167

3__3. 3_ . Then the line involves magnetic characteristics, various types of fluorescent screens, and various tests of the influence of heat (heat generation characteristics) [0 0 8 3] [Table 1 Thickness (mm) 6. 8 Inductance (mH ) 0. 13 6 «Available for conventional 6.8mm thick iron core minus [0 0 9 0] If the core temperature rises and its characteristics deteriorate, it will be a

200409167 V. Description of the invention (13) Serious problems. However, ‘fortunately, the habit temperature of conventional iron cores is higher than 13 0 C’ and the magnetic permeability of the iron core has a better tendency before reaching the rite temperature. Therefore, this problem can also be treated as negligible. [0 0 9 1] In the case of a vertical deflection coil, since its position is closer to the iron core, its inductance decreases slightly with the thickness of the iron core. [0092] [Table 2] Thickness (mm) 6. 8 6. 3 5. 8 4. 8 4. 3 3. 8 3.3 Inductance (mH) 6. 33 5 6. 30 0 6 · 31 3 6.30 6- ----- _ 6. 25 4 6. 23 7 6. 21 0 6. 06 [0 0 9 3] Table 2 shows how the inductance of the vertical deflection coil changes with the thickness of the core. [00 94] As shown in Table 2, when the normal iron core thickness was reduced from 68 mm to 33 mm, the inductance of the vertical deflection coil was reduced by 0.27 mH (about 4%). [0095] In addition, the vertical deflection size of the electron beam is also reduced. [0 0 9 6] Due to the decrease of the core thickness, the inductance of the vertical deflection coil decreases by 4%, which can be easily compensated by increasing the number of turns of the vertical deflection coil (usually 丨 〇 〇) 4-6. In this way, the deflection coil can perform its normal work, that is, deflecting the electron beam without causing power loss or needing to modify the physical structure of the coil. / [0 0 9 7] If the thickness of the iron core is reduced by 3mm, such as from 68 to 3 8_❿ 'The inductance of the vertical deflection coil is only reduced by a small amount, such as from 6335_ to 6.21〇11111, which shows that the decrease is not more than 2% about. [0098] Similarly, no significant change was observed in the degree of convergence according to the vertical deflection despite the decrease in the core thickness.

200409167 V. Description of the invention (14) [0 0 9 9] In short, ‘to deflection horizontally ^ Reduce the original thickness (ie 7mm) by 50 ° /. Or even more. "The thickness of the core can be said, the appropriate thickness of the core can be vertical deflection coil according to the vertical two" [thanks. 〇] Assuming that the current vertical deflection is not straight, the complement of the gate rotation g is 5% of the vertical inductance, then the iron core is shouted, and the iron is appropriately thick 3.〇_. " ^ The minimum thickness of the soil can be reduced to [〇〇101] Using this thin iron core, adding h — au _ number of turns and the thickness of the coil is related, it is possible to control, heart: surgery: help (with the coil core but still maintain iron The important characteristics of the core. The cost of iron is very low [0 0 1 02] According to the experimental results shown in Tables 1 and 2 and the analysis made by Xiao Qi ', the maximum thickness point required for the core of the present invention is 3 [00103] In addition, according to the thin iron core of the present invention, the length "should be in the range of 0.1 ILh to 0.9 Lh, so as not to cause the deterioration of iron rage characteristics, and can produce the same effect as before. [0 0 1 04] More preferably, the maximum thickness point of the iron core is in the range of 4mm to 6mm. [0 0 1 0 5] Lijia is' if you want to minimize the manufacturing cost without changing the characteristics of the iron rage itself At this time, the maximum thickness point of the iron core is in the range of 4m [n to 5.5]. [0 0 1 0 6] At the same time, the thickness Tn of the neck-side end of the thin iron core is not more than 5mm and not less than 4mm. [0 0 1 0 7] This type of iron core, regardless of whether the shape from its neck side end to the screen side end is completely round, Sectional side end of the neck

19 200409167 V. Description of the invention (15) Face 9 is actually round or rectangular, or whether the cross section of the side of the fluorescent screen is rectangular, can be widely used. [0 0 1 08] In the latter case, the maximum thickness point is preferably in the range of 3 mm] to 6 mm. [0 0 1 0 9] In addition, the principles of the present invention are also applicable to segmented cores. [0 0 1 1 0] As for the iron core with a rectangular cross section at one end of the phosphor screen, the length Lf thereof ranges from 0.1 Lh to 0.9 Lh, where Lh is the length of the horizontal deflection coil. More specifically, Lf is not more than 55 mm and not less than 35 mm. [0 0 111] Especially, the iron core with a rectangular cross section at one end on the side of the fluorescent screen has a thickness of more than 4 mm to 6 mm. [0 0 11 2] The best is that if you want to minimize the manufacturing cost without changing the characteristics of the core itself, the maximum thickness point of the core is in the range of 4mm to 5.5mm. [0 0 11 3] A rectangular iron core having a rectangular cross section at one end on the side of the fluorescent screen, and a large thickness Tn on the side of the neck side is preferably not more than 5mn] and not less than ^! ^. [0 0 11 4] The iron core of the present invention can be applied to televisions and computer monitors. With 1 TV day ^ ', it dares to have a large horizontal scanning frequency below 4 8 k η z; for monitoring, its maximum horizontal scanning frequency is below 80 kHz. [00115] In general, a monitor uses a saddle / saddle type deflection coil (the former corresponds to a horizontal deflection coil and the latter corresponds to a vertical deflection coil, of which " saddle type " is not a coil shape); a television uses a saddle / saddle type or Saddle / ring coil (the former corresponds to the horizontal-horizontal deflection coil and the latter corresponds to the vertical deflection coil, where "ring type" means that the iron core is directly surrounded by the coil). [00116] Regardless of the type, the thin iron core of the present invention can be used. 200409167 V. Description of the invention (16) This is because, as long as the internal magnetic field strength does not change excessively, the core thickness does not need to change significantly. [0 0 1 1 7] Therefore, when the thin iron core of the present invention is applied to a monitor and a television, each can prove different characteristics of the iron core. Some of these features have been discussed previously, but others are now explained. [0 0 1 1 8] In most cases, the end of the core neck side is very thick when compared with the total thickness of the core. This is because the temperature at the end of the neck of the iron core is higher than other parts, which indicates that it should have relatively good heat dissipation characteristics. [0 0 1 1 9] Therefore, when the thin iron core of the present invention is used, the thickness at the end of the neck side should be about 4mm-5mm, and it should be at least 80% of the maximum thickness. [0 0 1 2 0] According to observation, when the end of the neck side is the thickest or is thinner than 80% of the maximum thickness, the heat release characteristics of the iron core are degraded. Therefore, it is important to keep the thickness of the neck-side end at least 80% of the maximum thickness of the core. [00121] A non-fully circular iron core 71 is shown in FIG. 7 (a), and a completely circular iron core 72 is shown in FIG. 7 (b). [0 0 1 2 2] Please refer to FIG. 7, n Max. Dnπ indicates the maximum inner diameter Dn of the end on the neck side of the iron core, n Max · Tη ”indicates the old L,,,, called Take a large thickness. This two variables are important factors in designing the thin iron core of the present invention without detracting from the advantages and advantages.

〇。 [0 0 1 2 3] Preferably, as shown in FIG. 7, the maximum thickness of the core and the neck side is 2 and not less than 1.0.

200409167 V. Description of Invention (17) ''

〇。 The ratio of Max. Dn to the maximum thickness of the core is not more than 10.5 and not less than 7.0. On the other hand, as for the deflection yoke for television, its ratio is not more than 2.5 and not less than 9.0. [0 0 1 2 5] FIG. 8 is a schematic diagram showing the thickness of the iron core at a length of 1/3 from the end of the phosphor screen side and the thickness of the iron core neck side end. As mentioned before, this figure shows the relationship between the optimal thinness iron core 24 from the f-screen side to the neck side = the thickness of the point (T-1 / 3s) and the maximum thickness at the neck side Max. Τη . ^ 々 [2 〇it The cross section of the end of the fluorescent screen is circular or oval. Second, the second side = the thickness of the side to the neck side at 1/3 points and the thickness of the neck side H. Max.Tn The ratio is not more than 10 and not less than 0. f make a thin & _ total, the main focus of the present invention is to optimize the design according to:. The core of the present invention has the advantage of removing the thick core. ^ It can reduce the manufacturing cost without losing the special deflection of the core itself [: =] : The body language product uses the iron core of this invention, which can greatly reduce the quantization. Because of &, it can be lowered: 运 衿;: 卜 ’It helps the cathode ray tube to be much easier. The cost of the round cathode cathode ray tube processing has also become [〇0 1 2 9] Although the above is an "out of date", the present invention is shown and explained, but this is not clear: some examples can be used in various forms and details. Change ;; $ = technical people should understand that the spirit and scope defined in it. Without departing from the patent application attached to the present invention [00130] The foregoing embodiments and advantages are for illustration purposes only, not for 200409167 V. Description of the invention (18) Limits the invention. The invention can be applied to other types of devices at any time. The purpose of the description of the invention is to illustrate rather than limit the scope of patent applications. Those skilled in this technology can obviously make many choices, Modifications and changes. The means and functional statements in each request are intended to include the structure described in this article to perform the described function, which includes not only structural equivalents, but also various equivalent structures.

Page 23 200409167

[Brief description of the drawings] [0 0 4 7] The reference numerals used in the present invention refer to the same ^ pieces, the drawings are described in detail, the same in the drawings [0 0 4 8] Figure 1 is a schematic diagram, _ Figure 2 shows a tube; ^ a cathode ray of a prior art. [0049] FIG. 2 is a perspective view of a cathode powder mag / ray ray deflection yoke; [0050] FIG. 3 illustrates a circular iron core and a rectangular iron. Structure of the core; [0 0 5 1] FIG. 4 illustrates the relative position of the horizontal deflection coil and the iron core, and shows the calculation background of the thickness of the iron core according to the present invention; [〇〇5 2] FIG. Sectional view of the thickness of the iron core; [0 0 5 3] FIG. 6 is a perspective view showing the thickness at the end of the neck side of the iron core and the inner diameter of the iron core; [0 0 5 4] FIG. 7 is a schematic diagram showing each The thickness and inner diameter of the neck-side end of the near-circular and circular cores; and [〇〇5 5] FIG. 8 is a schematic diagram showing the length of the core from the end of the fluorescent screen side to the core length in the present invention The thickness at the point of 1/3, and the thickness at the end of the neck side of the core. [Component symbol correspondence table] I panel

II cathode ray tube 12 fluorescent screen 13 electron grab 14 shadow mask 15 deflection yoke

Page 24 200409167 Brief description of the diagram 16 Electron beam 2 Funnel 21 Horizontal deflection coil 22 Vertical deflection coil 23 Stand 24 Iron core 2 5 a Elimination coil 2 5 b Elimination coil 2 6 a Connection line 26b Connection line 27 Connection plate 31 Round Shaped iron core 32 rectangular iron core 5 2 round iron core 53 rectangular iron core 61 round iron core 71 iron core 72 iron core

Page 25

Claims (1)

200409167 VI. Application Patent Scope 1. A deflection yoke of a cathode ray tube, in which μ electrons are used to emit an electron beam, and a two-plate, a funnel, and an electron beam are emitted; the deflection yoke includes a yoke for To deflect the electron, a horizontal deflection coil can deflect the vertical deflection coil: horizontal deflection;-a stand that can support the building and deflect in the vertical direction; and the horizontal and vertical deflection coil cores can lower the horizontal disc The leakage magnetic flux on the return path; i; The magnetic field generated by the special coil is if the largest and thickest y exists in the core, and the point is not less than 3_. With the degree of 2 days, the maximum thickness of the iron core ΐ deflection magnetic light 'is provided with-panel,-funnel,-grab the emitted electron beam; the deflection magnetic vehicle = light to deflect the electron-:: deflection coil' can The electron beam is oriented horizontally = deflection coil, which can deflect the electron beam vertically:; and 1 'can support and isolate the horizontal and vertical deflection coils at the same time: iron core, which can reduce the magnetic generated by the horizontal and vertical deflection coils. It is a magnetic flux; where the thickness of the iron core is less than 6_, and there are maximum and minimum thickness points in the iron core; the maximum thickness of the iron core is between the end of the core neck side and 1 / 2Lf, where Lf is " The deflection magnetism of the leaky cathode ray tube is provided with a panel. 200409167 VI. Patent application scope Electronic grabbers are used to emit electron beams and _deflected magnetic grabbers are used to emit electron beams; The deflection yoke includes: deflects the electrons to a level The deflection coil can direct the electron beam toward a vertical deflection coil, which can deflect the electron beam; ## iaodingshi production, Menshicai deflection in the vertical direction; and the horizontal and vertical deflection coils that can support the return of the horizontal and vertical deflection coils in Asia : Π: leakage magnetic flux on w, with the magnetic field generated by the vertical deflection coil, wherein the funnel has a poor yoke placement part, and the inner surface of the yoke placement part, the cross section of the outer surface of the magnet of the stone yoke, It changes from the neck and Xia from circular to non-circular; and the iron scallop 1 gradually ranges from 6mm. The thickness is taken as the point thickness. 4. As the scope of the patent application No.! To No. 3 deflection The thickness of the minimum thickness point of the yoke core is not less than 2mm. ， 4 and the iron 5. For example, please apply for the deflection magnetic vehicle of item i to item 3, where the thickness of the core is 4mm to 6 The range is between. &Quot; '6. For the deflecting magnetic vehicles of the scope of application for items i to 3, the vertical turning coil runs from the neck to the end of the fluorescent screen! The length of one end ^ Neck: one end to the side The length of the screen side-end is Lf: and this; the end of the J-carrying neck is tied to the end of the iron core fluorescent screen side, in the range of 0 · ILh to 0.9Lh. ≫ 卞 狮 得 、、 泉7. The length of the deflection magnetic neck side-end to the glorious screen side-end of the scope of application for the items i to 3 is not more than 55 and not less than 35m m 〇 ', page 27, 200409167 6. Application scope of patent 8 · If the scope of the scope of patent application is circular or oval 9. If the thickness of the end of the side of the part of the scope of patent application is not 10 At 1 · 2 and not less than 1. 〇11 · If the scope of patent application is from the end of the fluorescent screen side to the end of the neck side to the end of the maximum 0 · 8 〇12 · If the application is for a segmented type 13 · If the application is for deflection Magnetic | Ergent 1 4 · If applying for the side of the exclusive side and not less than 7.15, if applying for the special deflection magnetic light 1 6 · If applying for the side of the exclusive side not less than 9.1? Iron core. Profit range Cathode radiation profit range Large internal profit range Cathode radiation profit range Large inner diameter 3 ° Profit range The deflection yoke of 1 to 3, wherein the deflection yoke of 1 to 3 of the iron core, wherein the core neck is larger than 5 mm and not less than 4 mm. The deflection yoke of items 1 to 3, the maximum thickness of the side-end of the core of the iron core in the bean, the ratio is not large. 0 The deflection yoke of items 1 to 3, where the core starts to the core length 1 / 3 point thickness, the ratio of the thickness to the large iron thickness is not greater than 1 · 〇 and not less than the deflection magnets of items 1 to 3, where the deflection yoke of the iron core items 1 to 3, 1 in Use this conduit as a monitor. '. The deflection yoke of item 13 in which the ratio of the core neck to the maximum thickness of the core is ^ greater than 10.5 f 1 to the deflection yoke of item 3, and the bobbin is used as A color TV. / 5, deflection yoke, in which the core neck is "iron '. The ratio of the maximum thickness is not greater than the deflection yoke in item 1 or 3 of I2 · 5, in which the core is 200409167. Between the side-end of the neck of the iron core and the friction, the thickness point 'm: deflection yoke of item 2 of 17', of which the core is the largest 19. If you apply for a special ^ 2: 5 · until the deflection coil is a saddle deflection The deflection magnetism of the coiler is light, in which the level is 20. If the deflection yoke in the scope of the patent application is a saddle-type deflection yoke J; the deflection yoke in which the honey is straight 2 1; The coil is a deflection magnet of a ring-shaped deflection coiler, where the honey straight Page 29