TWI416555B - Current balance transformer - Google Patents
Current balance transformer Download PDFInfo
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- TWI416555B TWI416555B TW95116746A TW95116746A TWI416555B TW I416555 B TWI416555 B TW I416555B TW 95116746 A TW95116746 A TW 95116746A TW 95116746 A TW95116746 A TW 95116746A TW I416555 B TWI416555 B TW I416555B
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- winding
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- bobbin
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- magnetic core
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- 238000004804 winding Methods 0.000 claims abstract description 149
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000001808 coupling effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/08—High-leakage transformers or inductances
- H01F38/10—Ballasts, e.g. for discharge lamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/04—Fixed transformers not covered by group H01F19/00 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/326—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures specifically adapted for discharge lamp ballasts
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
本發明係有關將負載電流平衡化所需的複數輸出用變壓器，並有關對冷陰極管或發光二極體群等亮燈電路有用的電流平衡變壓器。The present invention relates to a complex output transformer for balancing a load current, and to a current balancing transformer useful for a lighting circuit such as a cold cathode tube or a light emitting diode group.
此申請係依據2005年5月12日申請之日本專利申請案，日本特願2005－139760號，以及2006年2月20日申請之日本專利申請案，日本特願2006－042926號來主張優先權，將該等內容援用於本案。The application is based on Japanese Patent Application No. 2005-139760, filed on May 12, 2005, and Japanese Patent Application No. 2006-042926, filed on Feb. 20, 2006. , the content is used in this case.
筆記型電腦或小型液晶顯示器之液晶面板，通常使用1支或2支左右的冷陰極管作為背光。又，近年來普及之大型液晶電視或液晶螢幕，係使用3支以上的冷陰極管作為背光。背光最重要的就是盡量平均照亮面板整體，因此必須對各冷陰極管供給盡量平均的電流。A liquid crystal panel of a notebook computer or a small liquid crystal display usually uses one or two or so cold cathode tubes as a backlight. Moreover, in a large-sized liquid crystal television or a liquid crystal screen which has been popularized in recent years, three or more cold cathode tubes are used as backlights. The most important thing about backlighting is to illuminate the entire panel as much as possible. Therefore, it is necessary to supply the average current to each cold cathode tube.
之前係設置與冷陰極管支數相同數量的反相器電路，獨立驅動各冷陰極管，分別控制電流來進行。但是此構造在小型液晶螢幕之液晶面板一般冷陰極管數量較少的情況下不會有大問題，但是像大型液晶電視或液晶螢幕般冷陰極管支數較多時，反相器電路會需要多數，同時難以小型化，而有使用多數零件造成成本變高的問題。In the past, the same number of inverter circuits as the number of cold cathode tubes were installed, and each of the cold cathode tubes was independently driven to control the current. However, this structure does not have a big problem in the case where the liquid crystal panel of the small liquid crystal screen generally has a small number of cold cathode tubes, but when the number of cold cathode tubes is large like a large liquid crystal television or a liquid crystal screen, the inverter circuit may need Most of them are difficult to miniaturize at the same time, and there is a problem that the cost is increased by using a large number of parts.
因此如第1圖及第13圖所示，開發有在反相器電路10與冷陰極管12之間連接平衡器，平均分配流動於各冷陰極管之電流的負載電流平衡裝置。第1圖之情況，先前技術中係對4個負載(冷陰極管12)使用3個相同的平衡器14。又第13圖之情況，先前技術中係對3個負載(冷陰極管12)使用2個平衡器14、15。各平衡器係使用在相同捲軸上具備2個繞線框的線軸，該線軸就是將繞線於兩繞線框之線圈與磁芯加以組合之構造的2輸出電流平衡變壓器。Therefore, as shown in FIGS. 1 and 13 , a load current balancing device that connects a balancer between the inverter circuit 10 and the cold cathode tube 12 and distributes the current flowing through each of the cold cathode tubes is developed. In the case of Fig. 1, in the prior art, three identical balancers 14 were used for four loads (cold cathode tubes 12). In the case of Fig. 13, in the prior art, two balancers 14, 15 were used for three loads (cold cathode tubes 12). Each of the balancers uses a bobbin having two bobbins on the same reel, and the bobbin is a 2-output current balance transformer in which a coil wound around two bobbins and a magnetic core are combined.
第1圖所示之電力平衡變壓器，係以第1段平衡器將電流做2分割，以第2段之2個平衡器將電流更加分別2分割地，來把3個平衡器做樹狀配置。藉此，將流動於各冷陰極管12之電流I1 ~I4 做平均分配的技術，係揭示於日本特開平6－269125號公報。In the power balance transformer shown in Fig. 1, the current is divided into two by the first stage balancer, and the current is further divided into two by the two equalizers of the second stage, and the three balancers are arranged in a tree. . Thus, the technique of evenly distributing the currents I 1 to I 4 flowing through the respective cold cathode tubes 12 is disclosed in Japanese Laid-Open Patent Publication No. Hei 6-269125.
第13圖所示之電力平衡變壓器中，第1平衡器14以圈數比2：1來繞線，第2平衡器15以圈數比1：1來繞線。第1平衡器14中圈數較少之線圈，在基板上串聯連接有第2平衡器15雙方的線圈。以第1平衡器14分流為流動於第1冷陰極管之電流I1 與流動於第2平衡器15的電流I2 3 ，然後以第2平衡器15分流為流動於第2冷陰極管之電流I2 與流動於第3冷陰極管之電流I3 與。藉此，最後可以將流動於所有冷陰極管12的電流I1 ~I3 做平均分配。此種技術也做為先前例被揭示於日本特開平6－269125號公報。In the power balance transformer shown in Fig. 13, the first balancer 14 is wound at a turn ratio of 2:1, and the second balancer 15 is wound at a turn ratio of 1:1. In the coil of the first balancer 14 having a small number of turns, the coils of both the second balancers 15 are connected in series to the substrate. The first balancer 14 is divided into a current I 1 flowing through the first cold cathode tube and a current I 2 3 flowing through the second balancer 15 , and then shunted by the second balancer 15 to flow to the second cold cathode tube. The current I 2 is connected to the current I 3 flowing through the third cold cathode tube. Thereby, the currents I 1 to I 3 flowing through all the cold cathode tubes 12 can be finally distributed evenly. This technique is also disclosed in Japanese Laid-Open Patent Publication No. Hei 6-269125.
此種負載電流平衡裝置，因為可以降低反相器電路之設置數量，故有大幅刪減控制電路或反相變壓器等零件數量的優點。Such a load current balancing device has the advantage of greatly reducing the number of components such as a control circuit or an inverter transformer because the number of inverter circuits can be reduced.
但是因為液晶畫面之大型化，使用於背光之冷陰極管支數也增加，例如15吋面板為4支，32吋面板會加大到16支。因此在第1圖或第13圖之使用2輸出平衡器的方式下，15吋面板要3個，32吋面板要15個，對於N支冷陰極管就需要(N-1)個平衡器。更且第13圖之構造中，還需要圈數比不同的2種平衡器。However, due to the enlargement of the liquid crystal screen, the number of cold cathode tubes used for backlighting has also increased. For example, there are 4 panels for 15 turns and 16 panels for 32 turns. Therefore, in the case of using the 2 output balancer in Fig. 1 or Fig. 13, there are 3 15 吋 panels, 15 32 吋 panels, and (N-1) balancers for N cold cathode tubes. Furthermore, in the configuration of Fig. 13, two kinds of balancers having different turns ratios are also required.
結果，尤其越是大型液晶面板，電路基板設計就越複雜，也無法忽略平衡器之安裝面積或成本。As a result, the larger the liquid crystal panel, the more complicated the circuit board design is, and the mounting area or cost of the balancer cannot be ignored.
本發明欲解決之課題，係使單一構造之變壓器零件，可以取得流動於3個或4個負載之電流的平衡，藉此謀求零件數量之降低或安裝面積之刪減、還有成本降低。The problem to be solved by the present invention is to achieve a balance of current flowing through three or four loads in a transformer component of a single structure, thereby reducing the number of components, reducing the mounting area, and reducing the cost.
第1發明，係一種電流平衡變壓器，其具備：線軸，該是在同一個捲軸上具備複數繞線框的線軸，具有由中間部2個場所之磁芯組裝溝所分割之3個繞線範圍，各繞線範圍分別具有2個繞線框；線圈，該是被纏繞於該線軸之各繞線框的線圈，具有繞線在中央繞線範圍之雙方繞線框的第1段電流分割用線圈，與分別繞線在位於兩側之繞線範圍之雙方繞線框的第2段電流分割用線圈；和磁芯，該是以使各繞線範圍之線圈形成閉磁路的方式而被設置。According to a first aspect of the invention, there is provided a current balancing transformer comprising: a bobbin, wherein the bobbin includes a plurality of winding frames on a same reel, and has three winding ranges divided by a core assembling groove at two places in the intermediate portion; Each winding range has two winding frames respectively; the coil is a coil wound around each winding frame of the bobbin, and the first section of the winding frame having the winding in the center winding range is used for current division. a coil, and a second-stage current dividing coil that is wound around each of the winding ranges on both sides; and a magnetic core, which is provided such that the coils of the respective winding ranges form a closed magnetic path .
在此，於將中央繞線範圍區分為2個繞線框的分隔件，設置連續線圈用之中繼端子為佳。若作為此種構造，則可將除了兩端以外之4個繞線框的線圈做連續繞線，以總計3個線圈來形成所有線圈。Here, in order to divide the center winding range into two separators, it is preferable to provide a relay terminal for the continuous coil. As such a configuration, the coils of the four winding frames other than the both ends can be continuously wound, and a total of three coils can be used to form all the coils.
磁芯可以由相對於背板2支外腳與2支內腳往同方向突出之構造的2個4腳磁芯，和I磁芯的組合所構成，上述I磁芯係貫通線軸，上述內腳則鑲嵌於線軸的磁芯組裝溝；磁芯也可以由I磁芯與目字形磁芯的組合所構成，上述I磁芯係貫通線軸，目字形磁芯之中間架橋部則鑲嵌於線軸的磁芯組裝溝。The magnetic core may be composed of a combination of two 4-pin magnetic cores having a structure in which the outer leg of the back plate 2 and the two inner legs protrude in the same direction, and an I magnetic core, wherein the I magnetic core is passed through the bobbin, and the inner core The foot is embedded in the core assembly groove of the bobbin; the magnetic core may also be composed of a combination of an I magnetic core and a mesh magnetic core, wherein the I magnetic core is through the bobbin, and the intermediate bridging portion of the mesh core is embedded in the bobbin. Magnetic core assembly groove.
作為第1發明之電流平衡變壓器的負載，有冷陰極管或發光二極體群。對亮燈電路裝入1個以上的上述電流平衡變壓器，然後將反相器電路之輸出分割為4之倍數，使分別成為負載之冷陰極管，或串聯連接的多數發光二極體亮燈。The load of the current balancing transformer of the first invention includes a cold cathode tube or a group of light emitting diodes. One or more of the above-described current balancing transformers are incorporated in the lighting circuit, and then the output of the inverter circuit is divided into multiples of four, so that the cold cathode tubes respectively serving as loads or the plurality of light emitting diodes connected in series are turned on.
第2發明，係一種電流平衡變壓器，其具備：線軸，該是在同一個捲軸上具備複數繞線框的線軸，具有由中間部2個場所之磁芯組裝溝所分割之2個繞線範圍，兩個繞線範圍分別具有2個繞線框；線軸，該是被纏繞於該線軸之各繞線框的線圈，具有繞線在一邊繞線範圍之2個繞線框的第1段電流分流用線圈，與繞線在另一邊繞線範圍之2個繞線框的第2段電流分流用線圈；和磁芯，該是以兩個繞線範圍之線圈形成各閉磁路的方式而被設置。以實質圈數2：1來繞線第1段電流分流用線圈，以實質圈數1：1來繞線第2段電流分流用線圈。藉此，以一邊之繞線範圍的2個線圈分流為1：2的電流比，較多那邊的電流則由另一邊之繞線範圍之2個線圈分流為1：2的電流比。藉此，可以對3個負載供給幾乎均等的電流。According to a second aspect of the invention, there is provided a current balancing transformer comprising: a bobbin, wherein the bobbin includes a plurality of winding frames on a same reel, and has two winding ranges divided by a core assembling groove of two places in the intermediate portion; The two winding ranges respectively have two winding frames; the bobbin, which is a coil wound around each winding frame of the bobbin, has a first current of two winding frames of the winding in one side of the winding range; a shunting coil, and a second-stage current shunting coil of two winding frames in a winding range on the other side of the winding; and a magnetic core, which is formed by forming a closed magnetic circuit by two windings of the winding range Settings. The first current shunt coil is wound in a substantial number of turns of 2:1, and the second current shunt coil is wound in a substantial number of turns of 1:1. Thereby, the two coils in the winding range of one side are shunted to a current ratio of 1:2, and the current of the larger one is shunted by the two coils in the winding range of the other side to a current ratio of 1:2. Thereby, almost equal current can be supplied to the three loads.
更理想來說，係使第1段中圈數較少之電流分流用線圈，位於接近一邊之繞線範圍之磁芯組裝溝的繞線框；第1段中圈數較多之電流分流用線圈、第1段中圈數較少之電流分流用線圈、和接近第2段中一邊之磁芯組裝溝的繞線框之電流分流用線圈，係中繼於裝配在線軸之端子而依序連續。More preferably, the current shunting coil having a smaller number of turns in the first stage is located in the winding frame of the magnetic core assembly groove in the winding range close to one side; in the first stage, the current is divided by the number of turns in the first stage. The coil, the current shunt coil having a small number of turns in the first stage, and the current shunt coil of the bobbin close to the core assembly groove of the second stage are relayed to the terminal of the assembly bobbin and sequentially continuous.
磁芯由E磁芯與I磁芯所構成，作為上述I磁芯貫通線軸之捲軸，上述E磁芯之內腳鑲嵌於線軸之磁芯組裝溝的構造。或是磁芯由U磁芯與I磁芯所構成，作為上述I磁芯貫通線軸之捲軸，上述U磁芯中一邊之腳被收容於於線軸之磁芯組裝溝的構造。或是磁芯由I磁芯與日字形磁芯之組合所構成，作為上述I磁芯貫通線軸之捲軸，上述日字形磁芯之中間架橋部鑲嵌於線軸之磁芯組裝溝的構造。此外，也可以是磁芯由I磁芯與E磁芯所構成，作為上述I磁芯鑲嵌於線軸的磁芯組裝溝，上述E磁芯之內腳則***線軸之捲軸的構造；或是磁芯由U磁芯與I磁芯所構成，作為上述I磁芯鑲嵌於線軸的磁芯組裝溝，上述U磁芯一邊之腳則***線軸之捲軸的構造。The magnetic core is composed of an E magnetic core and an I magnetic core, and is a reel of the I magnetic core through the bobbin, and the inner leg of the E magnetic core is embedded in the magnetic core assembly groove of the bobbin. Alternatively, the magnetic core is composed of a U core and an I core, and the I core is wound through a bobbin, and one of the U cores is accommodated in a core assembly groove of the bobbin. Alternatively, the magnetic core is composed of a combination of an I magnetic core and a Japanese magnetic core, and the intermediate core of the I-shaped magnetic core is inserted into the core assembly groove of the bobbin as the reel of the I core. In addition, the magnetic core may be composed of an I core and an E core, and the core of the E core may be inserted into the core assembly groove of the bobbin, and the inner leg of the E core may be inserted into the reel of the bobbin; or The core is composed of a U core and an I core, and the I core is embedded in the core assembly groove of the bobbin, and the leg of the U core is inserted into the reel of the bobbin.
作為第2發明之電流平衡變壓器的負載，有冷陰極管或發光二極體群。對亮燈電路裝入1個以上的上述電流平衡變壓器，然後將反相器電路之輸出分割為3輸出以上，使分別成為因輸出而成為負載之冷陰極管，或串聯連接的多數發光二極體亮燈。The load of the current balancing transformer of the second invention includes a cold cathode tube or a group of light emitting diodes. One or more of the above-described current balancing transformers are incorporated in the lighting circuit, and the output of the inverter circuit is divided into three or more outputs, so that they become cold cathode tubes that become loads due to output, or a plurality of light-emitting diodes connected in series The body lights up.
第2圖，係表示本案第1發明之一個實施例之電流平衡變壓器的說明圖；A表示平面，B表示側面。此電流平衡變壓器，係將對4個負載(冷陰極管等)供給之電流加以平衡化者，使用在相同捲軸上並列設置6個繞線框之線軸20，係將繞線於該線軸20之各繞線框之線圈22，與磁芯24加以組合的構造。Fig. 2 is an explanatory view showing a current balancing transformer according to an embodiment of the first invention of the present invention; A is a plane, and B is a side surface. The current balancing transformer is a method of balancing the current supplied by four loads (cold cathode tubes, etc.), and using a bobbin 20 in which six winding frames are arranged side by side on the same reel, which is wound around the bobbin 20 The coil 22 of each bobbin is combined with the magnetic core 24.
第3圖係線圈之說明圖，A表示對線軸繞上線圈之狀態，B表示線軸側面。線軸20具有由2個場所之磁芯組裝溝所分割的3個繞線範圍P、Q、R，各繞線範圍P、Q、R分別具備2個繞線框。以從捲軸26往外方向伸出之3片凸緣27來形成1個繞線範圍，在捲軸26兩端設置2個立方體狀之端子台28，並在繞線範圍之間設置2個立方體狀之端子台29；此等捲軸26，凸緣27，端子台28、29係一體成型品。靠近中央之2個端子台29上方，且有凸緣相對之空隙，則成為磁芯組裝溝。兩側之端子台28兩端各別設置有1個端子30，靠近中央之2個端子台29兩端則分別設置有2個端子30。在此，線軸係面安裝型，但是當然也可以是針腳型。Fig. 3 is an explanatory view of the coil, A indicates a state in which the bobbin is wound around the bobbin, and B indicates a side surface of the bobbin. The bobbin 20 has three winding ranges P, Q, and R divided by two core assembly grooves, and each of the winding ranges P, Q, and R has two winding frames. Three winding flanges 27 extending outward from the spool 26 are formed to form one winding range, two cube-shaped terminal blocks 28 are provided at both ends of the spool 26, and two cube-shaped portions are disposed between the winding ranges. The terminal block 29; the reels 26, the flanges 27, and the terminal blocks 28, 29 are integrally molded. The magnetic core assembly groove is formed above the two terminal blocks 29 in the center and has a gap with respect to the flange. One terminal 30 is provided at each end of the terminal block 28 on both sides, and two terminals 30 are provided at two ends of the two terminal blocks 29 near the center. Here, the bobbin is mounted on the surface, but of course it may be a stitch type.
對以凸緣分隔之6個繞線框，分別施加繞線，而各線圈p1、p2、q1、q2、r1、r2之終端，係分別繫於位於附近的端子30而由銲錫等來連接。繞線圖如第4圖所示。例如線圈p1、p2分別為200圈，線圈q1、q2、r1、r2分別為410圈。圈數係配合必要電感及頻率特性來適當設定。各繞線範圍之2個線圈係相同圈數。The windings are respectively applied to the six winding frames separated by the flanges, and the terminals of the respective coils p1, p2, q1, q2, r1, and r2 are connected to the terminals 30 located in the vicinity, and are connected by solder or the like. The winding diagram is shown in Figure 4. For example, the coils p1 and p2 are respectively 200 turns, and the coils q1, q2, r1, and r2 are respectively 410 turns. The number of turns is appropriately set in accordance with the necessary inductance and frequency characteristics. The two coils in each winding range are the same number of turns.
第5圖表示對此種線軸裝入磁芯之狀態。磁芯係由1支I磁芯32與2個四腳磁芯34組合而成。4腳磁芯34係E型磁芯之變形，為對背板有2支外腳與2支內腳於同方向突出的構造。對線軸20之捲軸插通I磁芯32，從兩側組合四腳磁芯34。此時四腳磁芯34支兩支內腳會鑲嵌於磁芯組裝溝，各腳之前端面會在I磁芯32之側面碰觸來組合。藉此，各繞線範圍P、Q、R之線圈會分別形成閉磁路。Fig. 5 shows a state in which the core is loaded with the core. The magnetic core is formed by combining one I core 32 and two four-leg cores 34. The 4-leg magnetic core 34 is a deformation of the E-shaped magnetic core, and has a structure in which two outer legs and two inner legs protrude in the same direction with respect to the back plate. The spool of the bobbin 20 is inserted through the I core 32, and the four-leg core 34 is combined from both sides. At this time, the two inner legs of the four-leg magnetic core 34 are embedded in the magnetic core assembly groove, and the front end faces of the respective legs are touched on the side of the I magnetic core 32 to be combined. Thereby, the coils of the respective winding ranges P, Q, and R form a closed magnetic path, respectively.
此種電流平衡變壓器，係如第6圖所示般裝入亮燈裝置。反相器電路10之輸出會經由反相變壓器11而供給到電流平衡變壓器40，4個輸出驅動各個冷陰極管12。虛線內部表示電流平衡變壓器40，端子間則由印刷配線板之圖案來連線。亦即中央之繞線範圍繞線有第1段之電流分割用線圈p1、p2，兩側之繞線範圍分別繞線有第2段之電流分割用線圈q1、q2、r1、r2的狀態。在此使第1段線圈之圈數比第2段線圈之圈數少。Such a current balancing transformer is incorporated in a lighting device as shown in FIG. The output of the inverter circuit 10 is supplied to the current balancing transformer 40 via the inverter transformer 11, and the four outputs drive the respective cold cathode tubes 12. The inside of the broken line indicates the current balancing transformer 40, and the terminals are connected by a pattern of printed wiring boards. In other words, the winding section of the center has the current dividing coils p1 and p2 of the first stage, and the winding sections on both sides are wound with the current dividing coils q1, q2, r1, and r2 of the second stage. Here, the number of turns of the first-stage coil is smaller than the number of turns of the second-stage coil.
第7圖表示此時之磁路。藉由與I磁芯32相對之2個四腳磁芯34，而如第7圖所示來形成一個磁氣迴路，其形成包圍中央繞線範圍P之閉磁路，和包圍兩側繞線範圍Q、R的2個閉磁路；藉由通過第1段線圈p1、p2之磁氣迴路，來取得流動於兩線圈p1、p2之電流平衡，而藉由通過第2段線圈q1、q2、r1、r2之磁氣迴路，來取得流動於兩線圈q1、q2及r1、r2之電流平衡；結果，連接於本發明之電流平衡變壓器之4之冷陰極管所流動的電流I1 ~I4 (參考第6圖)會變平均。Figure 7 shows the magnetic circuit at this time. By the two four-leg cores 34 opposite to the I core 32, a magnetic circuit is formed as shown in Fig. 7, which forms a closed magnetic path surrounding the central winding range P, and surrounds both sides of the winding range. The two closed magnetic paths of Q and R; the current balance flowing through the two coils p1 and p2 is obtained by the magnetic circuit of the first-stage coils p1 and p2, and the second-stage coils q1, q2, and r1 are passed. And a magnetic circuit of r2 to obtain a current balance flowing between the two coils q1, q2 and r1, r2; as a result, a current I 1 ~ I 4 flowing through the cold cathode tube of the current balancing transformer of the present invention ( Refer to Figure 6) will become average.
試著製作先前將3個2輸出之電流平衡變壓器配置為樹狀的第1圖所示之亮燈裝置，和使用了本發明之4輸出電流平衡變壓器的亮燈裝置(第6圖)，針對該等來測定流動於各冷陰極管(CFL1~4)的電流。將測定結果表示於第1表。從第1表，確認到管電流之不一致，本發明係與先前構造相等。It is attempted to produce a lighting device as shown in Fig. 1 in which three two-output current balancing transformers have been arranged in a tree shape, and a lighting device (Fig. 6) using the four-output current balancing transformer of the present invention, These measures the current flowing in each of the cold cathode tubes (CFLs 1 to 4). The measurement results are shown in the first table. From the first table, it was confirmed that the tube current was inconsistent, and the present invention was equal to the previous configuration.
第8圖係表示本案第1發明中其他實施例之電流平衡變壓器的說明圖。此電流平衡變壓器，也是將對4個負載(冷陰極管等)供給之電流加以平衡化者，使用在相同捲軸上並列設置6個繞線框之線軸，係將繞線於該線軸之各繞線框之線圈，與磁芯加以組合的構造。此實施例，係改線軸形狀及線圈的繞線構造。Fig. 8 is an explanatory view showing a current balancing transformer according to another embodiment of the first invention of the present invention. The current balancing transformer is also a method of balancing the current supplied to four loads (cold cathode tubes, etc.), and using a bobbin in which six winding frames are arranged side by side on the same reel, which is wound around the bobbin. The wire frame coil is combined with the magnetic core. In this embodiment, the bobbin shape and the winding configuration of the coil are modified.
第9圖係線圈之說明圖，A表示對線軸繞上線圈之狀態，B表示繞線圖。線軸50具有由2個場所之磁芯組裝溝所分割的3個繞線範圍P~R，各繞線範圍P~R分別具備2個繞線框。兩側由3片凸緣形成1個繞線範圍，中央之繞線範圍則具備4片凸緣，由分隔件51區分為2個繞線框。捲軸之兩端及繞線範圍之間，設置有總計4個立方體狀的端子台52，在靠近中央之2個端子台上，有凸緣相對之空隙，係成為磁芯安裝溝。各端子台52之兩端各設置有1個端子54，中央之分隔件51則設置有連續繞線用之中繼端子55。此實施例中，係利用中繼端子55來中繼繞線，藉此謀求內部連線，以3個繞線完成變壓器而下了功夫。亦即從端子a開始繞而結束於端子b之繞線，從端子d開始繞而經過端子c→中繼端子i→端子e→端子f結束的繞線，從端子h開始繞而在端子g結束的繞線等，總計3繞線。Fig. 9 is an explanatory view of a coil, A indicates a state in which the bobbin is wound around the coil, and B indicates a winding diagram. The bobbin 50 has three winding ranges P to R divided by the magnetic core assembly grooves of two places, and each of the winding ranges P to R has two winding frames. The two sides are formed by three flanges to form one winding range, and the center winding range has four flanges, and the partitioning member 51 is divided into two winding frames. A total of four cube-shaped terminal blocks 52 are provided between the both ends of the reel and the winding range, and the two terminal blocks close to the center have a gap with respect to the flange, which serves as a core mounting groove. One terminal 54 is provided at each end of each terminal block 52, and the central separator 51 is provided with a relay terminal 55 for continuous winding. In this embodiment, the relay terminal 55 is used to relay the winding, thereby achieving internal wiring and completing the transformer with three windings. That is, the winding which is wound from the terminal a and ends at the terminal b, and is wound from the terminal d and passed through the terminal c → the relay terminal i → the terminal e → the terminal f, and is wound from the terminal h at the terminal g. The winding is completed, and the total is 3 windings.
此種電流平衡變壓器，係如第10圖所示般裝入亮燈裝置。反相器電路10之輸出會經由反相變壓器11而供給到電流平衡變壓器60，4個輸出驅動各個冷陰極管12。虛線內部表示電流平衡變壓器60，端子間則由印刷配線板之 圖案來連線。亦即中央之繞線範圍P繞線有第1段之電流分割用線圈p1、p2，兩側之繞線範圍Q、R分別繞線有第2段之電流分割用線圈q1、q2及r1、r2的狀態。此構造，細部需要印刷配線板之連線圖案，該份量可以簡單化。藉由使用此種電流平衡變壓器60，可以將所連接之4支冷陰極管12所流動的電流平衡化。Such a current balancing transformer is incorporated in a lighting device as shown in FIG. The output of the inverter circuit 10 is supplied to the current balancing transformer 60 via the inverting transformer 11, and the four outputs drive the respective cold cathode tubes 12. The inside of the dotted line indicates the current balance transformer 60, and the terminals are printed by the printed wiring board. The pattern is connected. That is, the center winding range P winding has the first-stage current dividing coils p1 and p2, and the winding ranges Q and R on both sides have the second-stage current dividing coils q1, q2, and r1, respectively. The state of r2. With this configuration, the detail requires a wiring pattern of the printed wiring board, and the amount can be simplified. By using such a current balancing transformer 60, the current flowing through the connected four cold cathode tubes 12 can be balanced.
第11圖，係表示電流平衡變壓器之其他實施例的俯視圖。線軸之構造係與第8圖之情況相同。當然，也可以與第2圖之構造相同。此實施例中，取代2個四腳磁芯而使用目字形磁芯62。將目字形磁芯62從上覆蓋，其下面之一部分碰觸I磁芯上面地來組合，而構成閉磁路。Figure 11 is a plan view showing another embodiment of a current balancing transformer. The construction of the bobbin is the same as in the case of Fig. 8. Of course, it can also be the same as the structure of Fig. 2. In this embodiment, the mesh core 62 is used instead of the two four-leg cores. The mesh-shaped magnetic core 62 is covered from above, and one of the lower portions thereof is combined with the upper surface of the I magnetic core to form a closed magnetic circuit.
第12圖，係表示應用了本發明之電流平衡變壓器之亮燈裝置的其他例子。此例子係驅動8支冷陰極管12的例子。反相器10之輸出係經由反相變壓器11供給到2輸出之平衡器64，將該平衡器64之兩個輸出供給到2個電流平衡變壓器60，總計驅動8支冷陰極管12。電流平衡變壓器60，係中央繞線範圍繞線有第1段電流分割用線圈，兩側繞線範圍分別繞線有第2段電流分割用線圈的狀態。藉此，流動於8支冷陰極管12的電流會平衡化。Fig. 12 is a view showing another example of a lighting device to which the current balancing transformer of the present invention is applied. This example is an example of driving eight cold cathode tubes 12. The output of the inverter 10 is supplied to the 2-output balancer 64 via the inverter transformer 11, and the two outputs of the balancer 64 are supplied to the two current balancing transformers 60, and a total of eight cold cathode tubes 12 are driven. The current balance transformer 60 has a first-stage current dividing coil in the center winding range winding, and a second-stage current dividing coil is wound around the winding sections on both sides. Thereby, the current flowing through the eight cold cathode tubes 12 is balanced.
上述實施例中，雖表示冷陰極管來作為負載，但並不限定於此。將串聯連接多數發光二極體(LED)之發光二極體群的LED亮燈裝置，也可適用本發明。In the above embodiment, the cold cathode tube is shown as a load, but the invention is not limited thereto. The present invention is also applicable to an LED lighting device in which a plurality of light-emitting diodes (LEDs) of a plurality of light-emitting diodes are connected in series.
另外，上述實施例中，雖然使第1段線圈之圈數比第2段線圈之圈數要少，但是也可以是相同圈數。又，液晶面板整體之電容成分不一致，或線之拉出等造成負載電流不一致時，藉由變更各個繞線之圈數，可以調整為消除不一致。Further, in the above embodiment, the number of turns of the first-stage coil is smaller than the number of turns of the second-stage coil, but the number of turns may be the same. Further, when the capacitance components of the entire liquid crystal panel do not match, or when the load currents do not match, the number of turns of each winding can be adjusted to eliminate the inconsistency.
第14圖，係表示本發明之電流平衡變壓器之一個實施例的說明圖，A表示平面，B表示側面。此電流平衡變壓器，係將對3個負載(冷陰極管等)供給之電流加以平衡化者，使用在相同捲軸上並列設置4個繞線框之線軸20，係將繞線於該線軸20之各繞線框之線圈22，與磁芯24加以組合的構造。Fig. 14 is an explanatory view showing an embodiment of the current balancing transformer of the present invention, wherein A represents a plane and B represents a side surface. The current balancing transformer is a method of balancing currents supplied to three loads (cold cathode tubes, etc.), and using a bobbin 20 in which four winding frames are arranged side by side on the same reel, which is wound around the bobbin 20 The coil 22 of each bobbin is combined with the magnetic core 24.
第15圖係線圈之說明圖，A表示從底面側看對線軸繞上線圈的狀態，B表示線軸側面。線軸20，係具有由中央1個場所之磁芯組裝溝所分割的2個繞線範圍P、Q，兩個繞線範圍P、Q分別具備2個繞線框。以從捲軸26往外方向伸出之3片凸緣27來形成1個繞線範圍。又，在捲軸26兩端設置2個立方體狀之端子台28，並在2個繞線範圍之間設置1個立方體狀之端子台29；此等端子台28、29底面形成有繞線通過溝。該等捲軸26，凸緣27，端子台28、29係一體成型品。另外，中央之2個端子台29上方，且有凸緣相對之空隙，則成為磁芯組裝溝。各端子台28、29兩端各別設置有1個端子30。在此，線軸係面安裝型，但是當然也可以是針腳型。Fig. 15 is an explanatory view of a coil, and A shows a state in which the bobbin is wound around the coil as viewed from the bottom side, and B represents the bobbin side. The bobbin 20 has two winding ranges P and Q divided by a core assembling groove at one center, and two winding ranges P and Q each have two winding frames. The three winding flanges 27 projecting outward from the spool 26 form one winding range. Further, two cube-shaped terminal blocks 28 are provided at both ends of the reel 26, and one cube-shaped terminal block 29 is provided between the two winding ranges; the bottom faces of the terminal blocks 28 and 29 are formed with winding passes. . These reels 26, flanges 27, and terminal blocks 28, 29 are integrally molded. Further, a magnetic core assembly groove is formed above the two terminal blocks 29 in the center and having a gap with respect to the flange. One terminal 30 is provided at each end of each of the terminal blocks 28 and 29. Here, the bobbin is mounted on the surface, but of course it may be a stitch type.
對以凸緣27所分隔之4個各繞線框，分別施加必要的繞線。繞線圖如第16圖所示。白圓圈表示端子。一邊之繞線範圍P中2個線圈p1、p2的圈數比為2：1，另一邊之繞線範圍Q中2個線圈q1、q2的圈數比為1：1。例如線圈P1為410圈，線圈p2為205圈，線圈q1、q2分別為355圈。圈數係配合必要之電感及頻率特性來適當設定。The necessary windings are applied to each of the four winding frames separated by the flanges 27. The winding diagram is shown in Figure 16. White circles indicate terminals. The number of turns of the two coils p1 and p2 in the winding range P on one side is 2:1, and the ratio of the turns of the two coils q1 and q2 in the winding range Q on the other side is 1:1. For example, the coil P1 is 410 turns, the coil p2 is 205 turns, and the coils q1 and q2 are 355 turns. The number of turns is appropriately set in accordance with the necessary inductance and frequency characteristics.
繞線作業，係如以下進行。將使一端聯繫與一邊之端子台28(圖示左手邊)中一邊之端子的線材，捲繞在繞線範圍P外側之繞線框而形成線圈p1；然後連繫於另一邊之端子，接著捲繞在繞線範圍P之內側捲線框而形成線圈p2；然後連繫於端子台29中一邊之端子，接著捲繞在繞線範圍Q內側之捲線框形成線圈q1，最後連繫於端子台29中另一邊的端子。然後將使一端聯繫與一邊之端子台28(圖示右手邊)中一邊之端子的線材，捲繞在繞線範圍Q外側之繞線框而形成線圈q2，再如第16圖A般連繫於另一邊的端子。又有如第16圖B般，連繫於線圈p2與線圈q1之間之端子的方法。連繫於端子之繞線終端，係以銲錫浸泡法等來銲錫連接。Winding operations are performed as follows. A wire which is connected to one end of one of the terminal blocks 28 (left hand side) of one side is wound around a winding frame outside the winding range P to form a coil p1; and then connected to the other terminal, and then Winding around the inner winding frame P of the winding range P to form the coil p2; then connecting to one of the terminals of the terminal block 29, then winding the winding frame forming the coil q1 inside the winding range Q, and finally connecting to the terminal block The terminal on the other side of 29. Then, the wire which is connected to one end of the terminal block 28 (the right hand side) of one side is wound around the winding frame outside the winding range Q to form the coil q2, and is connected as shown in FIG. The terminal on the other side. There is also a method of connecting the terminals between the coil p2 and the coil q1 as in Fig. 16B. The winding terminal connected to the terminal is soldered by a solder immersion method or the like.
第17圖表示於如此施加有繞線之線軸裝入磁芯的狀態。在此，磁芯係1個I磁芯32與2個E磁芯36組合而成。於線軸20之捲軸插通I磁芯32，從兩側組合E磁芯36。此時，係組合為使E磁芯36之內腳鑲嵌於磁芯組裝溝，而各腳之前端面在I磁芯32的側面碰觸。藉此，兩繞線範圍P、Q之線圈會分別成為閉磁路，而形成電流平衡變壓器。Fig. 17 shows a state in which the magnetic core is loaded into the bobbin to which the winding is applied. Here, the magnetic core is formed by combining one I core 32 and two E cores 36. The reel of the bobbin 20 is inserted through the I core 32, and the E core 36 is combined from both sides. At this time, the inner legs of the E core 36 are combined in the core assembly groove, and the front end faces of the respective legs are in contact with the side faces of the I core 32. Thereby, the coils of the two winding ranges P and Q respectively become closed magnetic circuits, and a current balancing transformer is formed.
此種電流平衡變壓器，係如第18圖所示般被裝入亮燈裝置。反相器電路10之輸出係經由反相變壓器11被供給到電流平衡變壓器40，3個輸出分別驅動冷陰極管12。虛線內部表示電流平衡變壓器40。第19圖表示此時之磁路。藉由與I磁芯32相對之2個E磁芯36，如第19圖之虛線所示，形成一個磁氣迴路，其形成包圍兩側之繞線範圍P、Q的2個閉磁路；藉由通過一邊之繞線範圍之線圈p1、p2的磁氣迴路，將流動於線圈p1、p2之電流分成1：2的比例，並藉由通過另一邊之繞線範圍之線圈q1、q2的磁氣迴路，將流動於兩個線圈q1、q2之電流平均(1：1)分開；結果，連接於本發明之電流平衡變壓器之3支冷陰極管所流動的電流I1 ~I3 (參考第18圖)會成為平均。This current balancing transformer is incorporated into the lighting device as shown in Fig. 18. The output of the inverter circuit 10 is supplied to the current balancing transformer 40 via the inverter transformer 11, and the three outputs drive the cold cathode tubes 12, respectively. The inside of the broken line represents the current balancing transformer 40. Figure 19 shows the magnetic circuit at this time. By means of two E cores 36 opposite to the I core 32, as shown by the dashed line in Fig. 19, a magnetic circuit is formed which forms two closed magnetic paths enclosing the winding ranges P and Q on both sides; The current flowing through the coils p1, p2 is divided into a ratio of 1:2 by the magnetic circuit of the coils p1, p2 passing through the winding range of one side, and the magnetic flux of the coils q1, q2 passing through the winding range of the other side is passed. The gas circuit divides the current flowing through the two coils q1 and q2 evenly (1:1); as a result, the current I 1 to I 3 flowing through the three cold cathode tubes of the current balancing transformer of the present invention (refer to 18) will become average.
試著製作先前將2個2輸出之平衡器配置為樹狀的第13圖所示之亮燈裝置，和使用了本發明之3輸出電流平衡變壓器的亮燈裝置(第18圖)，針對該等來測定流動於各冷陰極管(CFL1~3)的電流。將測定結果表示於第2表。從第2表，確認到管電流之不一致，本發明係與先前構造相等。這次，雖然將線圈p1、p2設定為2：1之圈數比，線圈q1、q2設定為1：1之圈數比，但是浮游電容等所形成之電路不一致，使管電流產生不一致的情況下，可藉一變更各線圈之圈數及圈數比來調整。Trying to produce a lighting device shown in Fig. 13 in which two two-output balancers have been arranged in a tree shape, and a lighting device (Fig. 18) using the three-output current balancing transformer of the present invention, Etc. to measure the current flowing in each of the cold cathode tubes (CFLs 1 to 3). The measurement results are shown in the second table. From the second table, it is confirmed that the tube current is inconsistent, and the present invention is equivalent to the previous configuration. In this case, although the coils p1 and p2 are set to a ratio of turns of 2:1, the coils q1 and q2 are set to a 1:1 turn ratio, but the circuits formed by the floating capacitors and the like do not match each other, and the tube currents do not match. It can be adjusted by changing the number of turns of each coil and the ratio of turns.
第20圖，係表示本發明中電流平衡變壓器之其他實施例的說明圖。A係以輔助凸緣100將1個繞線框更加分割為複數的例子。線軸20，係除了第15圖所示之構造之外，更於1個繞線框設置輔助凸緣100的構造；磁芯係I磁芯32與E磁芯36的組合。藉由如此增加分割數量，可提高電流平衡變壓器之自我共振頻率。B係經由間隔板104將2個立方體磁芯102連結為I磁芯32的構造，是該間隔板104剛好位於磁芯組裝溝而組裝的例子。線軸20也可以是與第15凸相同的構造。藉由如此配置間隔板104，可以降低線圈p1－p2與線圈q1－q2的磁性偶合影響。Fig. 20 is an explanatory view showing another embodiment of the current balancing transformer of the present invention. A is an example in which one winding frame is further divided into plural numbers by the auxiliary flange 100. The bobbin 20 is a configuration in which the auxiliary flange 100 is provided in one winding frame in addition to the configuration shown in Fig. 15; the combination of the magnetic core I core 32 and the E core 36. By increasing the number of divisions in this way, the self-resonant frequency of the current balancing transformer can be increased. B is a structure in which two cubic cores 102 are connected to the I core 32 via the spacer 104, and the spacer 104 is assembled just in the core assembly groove. The bobbin 20 may also have the same configuration as the fifteenth projection. By arranging the spacers 104 in this way, the magnetic coupling effects of the coils p1-p2 and the coils q1-q2 can be reduced.
第21圖，係表示本發明中電流平衡變壓器之更其他實施例的說明圖。A所示之例子中，線軸係與第15圖所示者為相同構造，磁芯係U磁芯56與I磁芯32的組合。另外A表示正面。然後使I磁芯32貫通線軸20之捲軸，使兩個U磁芯56中一邊之腳靠攏，收容於線軸20之磁芯組裝溝而組裝。B所示之例子中，線軸係與第20圖A所示者相同，為具備輔助凸緣100的構造；磁芯係I磁芯32與日字形磁芯58的組合。另外B表示平面。然後使I磁芯32貫通線軸之捲軸，使日字形磁芯58之中間架橋部58a鑲嵌於線軸20的磁芯組裝溝，來加以組裝。Fig. 21 is an explanatory view showing still another embodiment of the current balancing transformer of the present invention. In the example shown in A, the bobbin is the same structure as that shown in Fig. 15, and the magnetic core is a combination of the U core 56 and the I core 32. In addition, A indicates positive. Then, the I core 32 is passed through the reel of the bobbin 20, and the legs of one of the two U cores 56 are brought together, and are accommodated in the core assembly groove of the bobbin 20 to be assembled. In the example shown by B, the bobbin is the same as that shown in Fig. 20A, and has a structure in which the auxiliary flange 100 is provided; the combination of the magnetic core I core 32 and the Japanese core 58. In addition, B represents a plane. Then, the I core 32 is passed through the reel of the bobbin, and the intermediate bridging portion 58a of the zigzag core 58 is fitted into the core assembling groove of the bobbin 20 to be assembled.
第22圖係表示本發明中電流平衡變壓器之其他實施例的說明圖。線軸20可以與第15圖所示者為相同構造。A表示平面，B表示將磁芯組裝入線軸的狀態。磁芯是由E磁芯80與I磁芯82所組合而成，但是組合方法與上述各實施例不同。此實施例中，係使I磁芯82鑲嵌於線軸20之磁芯組裝溝，使E磁芯80之內腳***線軸20之捲軸的兩側來組裝。E磁芯80之各腳的前端面，會在I磁芯82的側面碰觸。Fig. 22 is an explanatory view showing another embodiment of the current balancing transformer of the present invention. The bobbin 20 can have the same configuration as that shown in Fig. 15. A denotes a plane, and B denotes a state in which the core group is loaded into the bobbin. The magnetic core is composed of an E magnetic core 80 and an I magnetic core 82, but the combination method is different from the above embodiments. In this embodiment, the I core 82 is embedded in the core assembly groove of the bobbin 20, and the inner leg of the E core 80 is inserted into both sides of the spool of the bobbin 20 for assembly. The front end face of each leg of the E core 80 is in contact with the side of the I core 82.
第23圖係表示本發明中電流平衡變壓器之其他實施例的說明圖。線軸20，任一個都可與第15圖所示者為相同構造。A所示之例子，係經由間隔板68來黏貼兩個板狀磁芯66而作為I磁芯84的構造。與I磁芯84組合的是與第22圖所示者相同之E磁芯80。另外A表示平面。此例子，也是使I磁芯82鑲嵌於線軸20之磁芯組裝溝，使E磁芯80之內腳***線軸20之捲軸的兩側來組裝。藉由如此配合間隔板68，可以降低一邊繞線範圍之線圈與另一邊繞線範圍之線圈的磁性偶合影響。B所示之例子，係磁芯為U磁芯70與I磁芯72組合而成。是I磁芯72鑲嵌於線軸20之磁芯組裝溝，上述U磁芯70中一邊之腳從線軸20之捲軸兩側***的構造。另外B表示正面。Figure 23 is an explanatory view showing another embodiment of the current balancing transformer of the present invention. Any of the bobbins 20 may have the same configuration as that shown in Fig. 15. The example shown in A is a structure in which two plate-shaped magnetic cores 66 are adhered via a spacer 68 as the I core 84. In combination with the I core 84, the E core 80 is the same as that shown in Fig. 22. In addition, A represents a plane. In this example, the magnetic core assembly 82 is also mounted on the core assembly groove of the bobbin 20, and the inner leg of the E core 80 is inserted into both sides of the reel of the bobbin 20 to be assembled. By thus fitting the spacers 68, it is possible to reduce the magnetic coupling effect of the coils on one side of the winding range and the coils on the other side of the winding range. In the example shown by B, the magnetic core is a combination of the U core 70 and the I core 72. The magnetic core 72 is mounted on the core assembly groove of the bobbin 20, and the leg of one of the U cores 70 is inserted from both sides of the reel of the bobbin 20. In addition, B indicates the front.
第24圖，係表示利用了本發明之電流平衡變壓器之亮燈裝置的其他例子。此例子係驅動6支冷陰極管12的 例子。反相器10之輸出係經由反相變壓器11供給到2輸出平衡器90，該平衡器90之兩個輸出則供給到2個電流平衡變壓器92，總計驅動6支冷陰極管12。電流平衡變壓器92，係以一邊繞線範圍之2個線圈分流為1：2的電流比，較多之電流會由另一邊繞線範圍之2個線圈，以1：2電流比分流為流動於第1冷陰極管的電流與流動於第2繞線範圍之2個線圈的電流。然後藉由另一邊線圈範圍之線圈，完成流動於第2冷陰極管之電流與流動於第3冷陰極管之電流的平衡化。藉此，可對3支冷陰極管(負載)供給幾乎均等的電流。另一邊之電流平衡器92也一樣。藉此，可達成流動於6支冷陰極管12之電流I1 ~I6 的平衡化。Fig. 24 is a view showing another example of a lighting device using the current balancing transformer of the present invention. This example is an example of driving six cold cathode tubes 12. The output of the inverter 10 is supplied to the 2-output balancer 90 via the inverter transformer 11, and the two outputs of the balancer 90 are supplied to the two current balancing transformers 92, and a total of six cold cathode tubes 12 are driven. The current balance transformer 92 is divided into two current coils of one winding range to have a current ratio of 1:2, and more current is flown by two coils of the other side winding range, and the current is divided by a 1:2 current ratio. The current of the first cold cathode tube and the current flowing through the two coils in the second winding range. Then, the current flowing through the second cold cathode tube and the current flowing through the third cold cathode tube are balanced by the coil of the other coil range. Thereby, almost equal current can be supplied to the three cold cathode tubes (loads). The same applies to the current balancer 92 on the other side. Thereby, the balance of the currents I 1 to I 6 flowing through the six cold cathode tubes 12 can be achieved.
上述實施例中，雖表示冷陰極管來作為負載，但並不限定於此。將串聯連接多數發光二極體(LED)之發光二極體群的LED亮燈裝置，也可適用本發明。In the above embodiment, the cold cathode tube is shown as a load, but the invention is not limited thereto. The present invention is also applicable to an LED lighting device in which a plurality of light-emitting diodes (LEDs) of a plurality of light-emitting diodes are connected in series.
另外，液晶面板整體之電容成分不一致，或線之拉出等造成負載電流不一致時，藉由變更各個繞線之圈數，可以調整為消除不一致。In addition, when the capacitance components of the entire liquid crystal panel do not match, or when the load currents do not match, the number of turns of each winding may be changed to eliminate the inconsistency.
本發明之電流平衡變壓器，是單一變壓器零件，又可以取得流動於許多負載之電流的平衡。大型液晶面板中，通常係使用3或4之倍數支冷陰極管來作為背光，故本發明之電流平衡變壓器，也符合此種使用狀況。藉由使用此種電流平衡變壓器，亮燈電路可以謀求電路基板設計簡單化、零件之安裝面積降低或成本刪減。更具體來說，為了對3個或4個負載將電流平衡化，先前技術中需要2種平衡器各1個，或是需要3個平衡器，但是本發明只要1個就好，故可以小型化。就材料費來說，因為可減少線軸及磁芯數量，故可以降低成本，也可以縮短對繞線機設置線軸的時間，而可達成製程中的成本降低。The current balancing transformer of the present invention is a single transformer component and can achieve a balance of current flowing through many loads. In a large liquid crystal panel, a cold cathode tube of 3 or 4 is usually used as a backlight, and the current balancing transformer of the present invention also conforms to such a use condition. By using such a current balancing transformer, the lighting circuit can simplify the design of the circuit board, reduce the mounting area of the parts, or reduce the cost. More specifically, in order to balance the current for three or four loads, the prior art requires one of two balancers, or three balancers, but the present invention is only one, so it can be small. Chemical. In terms of material cost, since the number of bobbins and cores can be reduced, the cost can be reduced, and the time for setting the bobbin to the winding machine can be shortened, and the cost reduction in the process can be achieved.
20．．．線軸20. . . Spool
22．．．線圈twenty two. . . Coil
24．．．磁芯twenty four. . . Magnetic core
26．．．捲軸26. . . reel
27．．．凸緣27. . . Flange
28、29．．．端子台28, 29. . . Terminal block
30．．．端子30. . . Terminal
32．．．I磁芯32. . . I core
34．．．4腳磁芯34. . . 4-pin core
36．．．E磁芯36. . . E core
P、Q、R．．．繞線範圍P, Q, R. . . Winding range
〔第1圖〕使用先前平衡器之亮燈裝置的說明圖〔第2圖〕表示本案第1發明之一個實施例之電流平衡變壓器的說明圖〔第3圖〕其線圈的說明圖〔第4圖〕其繞線圖〔第5圖〕於線軸裝入磁芯之狀態的說明圖〔第6圖〕裝入了本案第1發明之電流平衡變壓器之亮燈裝置的說明圖〔第7圖〕本案第1發明之電流平衡變壓器之磁路的說明圖〔第8圖〕表示本案第1發明中其他實施例之電流平衡變壓器的說明圖〔第9圖〕其線圈之說明圖〔第10圖〕裝入該電流平衡變壓器之亮燈裝置的說明圖〔第11圖〕表示電流平衡變壓器之其他實施例的俯視圖〔第12圖〕表示應用了本案第1發明之電流平衡變壓器之亮燈裝置之其他例子的說明圖〔第13圖〕使用先前其他平衡器之亮燈裝置的說明圖〔第14圖〕表示本案第2發明之一個實施例之電流平衡變壓器的說明圖〔第15圖〕其線圈的說明圖〔第16圖〕其繞線圖〔第17圖〕於線軸裝入磁芯之狀態的說明圖〔第18圖〕裝入了本案第2發明之電流平衡變壓器之亮燈裝置的說明圖〔第19圖〕本案第2發明之電流平衡變壓器之磁路的說明圖〔第20圖〕表示本案第2發明中其他實施例之電流平衡變壓器的說明圖〔第21圖〕表示本案第2發明中更其他實施例之電流平衡變壓器的說明圖〔第22圖〕表示本案第2發明中其他實施例之電流平衡變壓器的說明圖〔第23圖〕表示本案第2發明中其他實施例之電流平衡變壓器的說明圖〔第24圖〕表示裝入了本案第2發明之其他實施例之電流平衡變壓器之亮燈裝置的說明圖[Fig. 1] An explanatory diagram of a current balancing transformer according to an embodiment of the first invention of the present invention (Fig. 3) showing an explanation of a coil (Fig. 4) Fig. 4 is a view showing a state in which a magnetic core is placed on a bobbin in a winding diagram (Fig. 5). Fig. 6 is an explanatory view of a lighting device of a current balancing transformer according to a first invention of the present invention (Fig. 7). Description of the magnetic circuit of the current balancing transformer according to the first aspect of the present invention (Fig. 8) is an explanatory view of the current balancing transformer according to another embodiment of the first invention of the present invention (Fig. 9). Description of the lighting device incorporated in the current balancing transformer (FIG. 11) shows a plan view of another embodiment of the current balancing transformer (FIG. 12) showing the other lighting device to which the current balancing transformer of the first invention of the present invention is applied Description of the Example [Fig. 13] An explanatory diagram of a current balancing transformer according to an embodiment of the second invention of the present invention (Fig. 14) is an explanatory diagram of a lighting device using a prior art balancer (Fig. 14). Illustrating〔 16] The winding diagram [Fig. 17] is an explanatory view of the state in which the magnetic core is inserted into the bobbin [Fig. 18]. The explanation of the lighting device of the current balancing transformer of the second invention of the present invention is incorporated. [Description of the magnetic circuit of the current balancing transformer according to the second invention of the present invention] (Fig. 20) shows an explanation of the current balancing transformer according to another embodiment of the second invention of the present invention (Fig. 21) showing still another embodiment of the second invention of the present invention. Description of the current balancing transformer of the second embodiment of the present invention (Fig. 23) is an explanatory view showing a current balancing transformer according to another embodiment of the second invention of the present invention. [Fig. 24] Fig. 24 is an explanatory view showing a lighting device of a current balancing transformer incorporating another embodiment of the second invention of the present invention
20．．．線軸20. . . Spool
22．．．線圈twenty two. . . Coil
24．．．磁芯twenty four. . . Magnetic core
27．．．凸緣27. . . Flange
28．．．端子台28. . . Terminal block
30．．．端子30. . . Terminal
32．．．I磁芯32. . . I core
34．．．4腳磁芯34. . . 4-pin core
Claims (13)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005139760A JP4693037B2 (en) | 2005-05-12 | 2005-05-12 | Current balance transformer |
| JP2006042926A JP4693052B2 (en) | 2006-02-20 | 2006-02-20 | Current balance transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200705476A TW200705476A (en) | 2007-02-01 |
| TWI416555B true TWI416555B (en) | 2013-11-21 |
Family
ID=37396466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW95116746A TWI416555B (en) | 2005-05-12 | 2006-05-11 | Current balance transformer |
Country Status (2)
| Country | Link |
|---|---|
| TW (1) | TWI416555B (en) |
| WO (1) | WO2006120957A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4497415B2 (en) * | 2005-05-25 | 2010-07-07 | Ｆｄｋ株式会社 | Current balance transformer |
| TWI414204B (en) * | 2007-09-28 | 2013-11-01 | Epistar Corp | Light source device, light-emitting component package and power supplier |
| JP2011124337A (en) * | 2009-12-09 | 2011-06-23 | Fdk Corp | Transformer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5940513A (en) * | 1982-08-28 | 1984-03-06 | Tdk Corp | Leakage transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH067214U (en) * | 1992-06-26 | 1994-01-28 | 東光株式会社 | Bobbin for multiple inductors |
| JPH10149932A (en) * | 1996-11-19 | 1998-06-02 | Hitachi Ferrite Electronics Ltd | High voltage transformer |
| JP2004335443A (en) * | 2003-02-10 | 2004-11-25 | Masakazu Ushijima | Inverter circuit for discharge tube for multiple lamp lighting, and surface light source system |
-
2006
- 2006-05-01 WO PCT/JP2006/309082 patent/WO2006120957A1/en active Application Filing
- 2006-05-11 TW TW95116746A patent/TWI416555B/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5940513A (en) * | 1982-08-28 | 1984-03-06 | Tdk Corp | Leakage transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200705476A (en) | 2007-02-01 |
| WO2006120957A1 (en) | 2006-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |