JPH0722528U - Backlight transformer - Google Patents

Backlight transformer

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Publication number
JPH0722528U
JPH0722528U JP5265493U JP5265493U JPH0722528U JP H0722528 U JPH0722528 U JP H0722528U JP 5265493 U JP5265493 U JP 5265493U JP 5265493 U JP5265493 U JP 5265493U JP H0722528 U JPH0722528 U JP H0722528U
Authority
JP
Japan
Prior art keywords
core
shaped
bobbin
transformer
shaped core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5265493U
Other languages
Japanese (ja)
Inventor
靖憲 河瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5265493U priority Critical patent/JPH0722528U/en
Publication of JPH0722528U publication Critical patent/JPH0722528U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】 【目的】2つの2次コイルの電圧差を無くし、2灯の冷
陰極ランプを均一に発光させる。 【構成】トランスは、コア1とボビン2と1次コイルN
1と2次コイルN21、N22とで構成され、コア1は
一対のC字型コア3を突き合わせ、I字形コア4をコア
3の中央周壁間にギャップ用スペ−サ−5を介在して固
定され、連結部12、13により一体とされている。ボ
ビン2は、I字形コア4を挿通する角筒の外周面の両端
面間を5分割する6個の鍔と、ボビン2の両端の鍔に外
向き突出した端子接続部7よりなる。1次コイルN1は
ボビン2の中央の鍔内に巻回したのち端子板8の端子に
接続され、同一の巻数の2次コイルN21,N22はボ
ビン2の中央の1次巻線の両側に設けた鍔内に巻回した
のちボビン2の端子接続部7に接続される。
(57) [Abstract] [Purpose] To eliminate the voltage difference between the two secondary coils and make the two cold cathode lamps emit light uniformly. [Structure] The transformer includes a core 1, a bobbin 2, and a primary coil N.
The core 1 is made up of a pair of C-shaped cores 3, and the I-shaped core 4 is fixed with a gap spacer 5 interposed between the central peripheral walls of the core 3. The connecting portions 12 and 13 are integrated. The bobbin 2 is composed of six flanges that divide the outer peripheral surface of the rectangular tube through which the I-shaped core 4 is divided into five between the both end surfaces, and the terminal connecting portions 7 that project outward to the flanges at both ends of the bobbin 2. The primary coil N1 is wound inside the central collar of the bobbin 2 and then connected to the terminals of the terminal plate 8. Secondary coils N21 and N22 having the same number of turns are provided on both sides of the central primary winding of the bobbin 2. After being wound in the collar, it is connected to the terminal connecting portion 7 of the bobbin 2.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は平面光源に用いられる冷陰極ランプの点灯装置に用いられる発振トラ ンスに関するもの。 The present invention relates to an oscillation transformer used in a lighting device for a cold cathode lamp used for a flat light source.

【0002】[0002]

【従来の技術】[Prior art]

従来の2灯用のバックライトの点灯回路は図5に示すようにトランジスタQ1 ,Q2を含むプッシュプル型のトランジスタインバ−タ−の回路構成になってい る。この点灯回路の直流電源DCに直流電圧が印加されるとトランジスタのQ1 ,Q2にベ−ス電流が流れると共に、コレクタにも発振トランスTrの1次巻線 N1を介して電圧が印加される。このようにして一方のQ1がタ−ンオンされて コレクタ電流が流れると、帰還巻線の作用により、トランジスタQ1のコレクタ 電流は一層増加しょうとするが、回路定数で決まった時間を経過した後トランジ スタQ1をタ−ンオフするように帰還がかかり、他方のトランジスタQ2がタ− ンオンする。以下同様にQ1,Q2がタ−ンオンオフを繰り返して発振トランス の2次巻線N21,N22に高周波電圧が発生し冷陰極ランプが点灯する。 As shown in FIG. 5, a conventional backlight lighting circuit for two lights has a push-pull type transistor inverter circuit configuration including transistors Q1 and Q2. When a DC voltage is applied to the DC power supply DC of this lighting circuit, a base current flows through the transistors Q1 and Q2, and a voltage is also applied to the collector through the primary winding N1 of the oscillation transformer Tr. In this way, when one Q1 is turned on and the collector current flows, the collector current of the transistor Q1 tries to increase further due to the action of the feedback winding, but after a lapse of the time determined by the circuit constant, the transition Feedback is applied so as to turn off the transistor Q1, and the other transistor Q2 turns on. Similarly, Q1 and Q2 are repeatedly turned on and off to generate a high-frequency voltage in the secondary windings N21 and N22 of the oscillating transformer to light the cold cathode lamp.

【0003】 この点灯回路に用いられるバックライト用トランス1cは、図6に示すように 一対のE字形コア3cを突き合わせて構成される1組の閉磁路を形成し、E字形 コアの中央の脚部間にギャップ5cを形成したコア1cと、前記E字形コア3c の中央の脚部を挿入する開口を有する角筒の外周面の両端と両端面間に6個のツ バを設けたボビン2cと、ボビン2cの一端のツバ内に巻回された1次コイルN 1cとボビン2cの他端より2区画毎に巻回された2次コイルN21c、N22 cとより構成されていた。The backlight transformer 1c used in this lighting circuit forms a set of closed magnetic paths formed by a pair of E-shaped cores 3c butted together as shown in FIG. 6, and the center leg of the E-shaped core is formed. A bobbin 2c having a core 1c having a gap 5c formed between the two parts and an outer peripheral surface of a square tube having an opening for inserting the central leg of the E-shaped core 3c, and six flanges provided between the both end surfaces. And the primary coil N 1c wound inside the collar at one end of the bobbin 2c and the secondary coils N21c and N22c wound at every two sections from the other end of the bobbin 2c.

【0004】[0004]

【考案が解決しょうとする課題】[Issues to be solved by the device]

しかし上記した従来のバックライト用トランスは1次コイルN1cがボビン2 cの一端のツバ内に巻回されているために、E字形コア3cのギャップ5cの漏 れ磁束の影響により2次コイルN21cと2次コイルN22cにて発生する2次 電圧に電圧差が生じ、冷陰極ランプの輝度にバラツキを発生させていた。 However, in the above-described conventional backlight transformer, since the primary coil N1c is wound inside the collar at one end of the bobbin 2c, the secondary coil N21c is affected by the leakage magnetic flux in the gap 5c of the E-shaped core 3c. And the secondary voltage generated in the secondary coil N22c has a voltage difference, which causes variations in the brightness of the cold cathode lamp.

【0005】 本考案はかかる点に鑑みてなされたもので、その目的とするところは、両2次 コイルの2次電圧差をなくし、2灯の冷陰極ランプを均一に発光させるバックラ イト用トランスの提供にある。The present invention has been made in view of the above point, and an object thereof is to eliminate a secondary voltage difference between both secondary coils and to make a backlight transformer capable of uniformly emitting two cold cathode lamps. Is provided.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

上記した課題を解決するために、本考案のバックライト用トランスは、C字形 コア−を突き合わせて構成されるO字形の外方磁路と、両C字形コア−の中央内 周壁間に同一のギャップを形成して配置されるI字形コア−で構成される内方磁 路とより構成される内鉄形鉄心と、鉄心の線対称中心位置となるI字形コア−の 中央に配置された1次巻線と、鉄心の線対称中心に関して対称位置をとるように I字形コア−上の1次巻線の両側に振り分けて配置された一対の2次巻線とで構 成する。又上記の内鉄形鉄心を、O字形の外方磁路と、O字形の外方磁路内に同 一のギャップを形成して配置されるI字形コア−で構成される内方磁路とより構 成するか、あるいわ、C字形コア−と、C字形コア−の開口端に同一のギャップ を形成して配置されるI字形コア−とより構成される外鉄形鉄心にしてもよい。 In order to solve the above problems, a backlight transformer according to the present invention has an O-shaped outer magnetic path formed by abutting C-shaped cores and a central inner peripheral wall of both C-shaped cores. 1 arranged at the center of the inner iron core composed of the inner magnetic path composed of the I-shaped core arranged with a gap and the I-shaped core located at the center of line symmetry of the iron core. It is composed of a secondary winding and a pair of secondary windings that are arranged on both sides of the primary winding on the I-shaped core so as to be symmetrical with respect to the center of line symmetry of the iron core. In addition, the inner iron core is composed of an O-shaped outer magnetic path and an I-shaped core arranged with the same gap formed in the O-shaped outer magnetic path. Or an outer iron core composed of a C-shaped core and an I-shaped core arranged with the same gap at the open end of the C-shaped core. Good.

【0007】[0007]

【作用】[Action]

上記の構成によれば、1次コイルに通電すると閉磁路に沿って磁束が発生し、 2次コイルに起電力が誘起される。このとき2次コイルとC字形コアとI字形コ アは1次コイルのセンタ−に対して対称に形成されているために、2次コイルに 同一の起電力が誘起され、ランプの輝度のバラツキが無くなる。 According to the above configuration, when the primary coil is energized, a magnetic flux is generated along the closed magnetic path, and an electromotive force is induced in the secondary coil. At this time, since the secondary coil, the C-shaped core, and the I-shaped core are formed symmetrically with respect to the center of the primary coil, the same electromotive force is induced in the secondary coil, which causes variations in the brightness of the lamp. Disappears.

【0008】[0008]

【実施例】【Example】

本考案の第一の実施例を図1、図2に基づいて説明する。バックライト用トラ ンスは図1に示すように、コア1とボビン2と1次コイルN1と2次コイルN2 1,N22とで構成される。 A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the backlight transformer is composed of a core 1, a bobbin 2, a primary coil N1, and secondary coils N21 and N22.

【0009】 前記トランスのコア1は、図2に示すように、フェライト等の磁性体からなり 、一対のC字形コア3を互いに突き合わせ、I字形コア4をこのC字形コア3の 中央内周壁間にギャップ用スペ−サ−5を介在して固定し、連結部12、13に より一体とされている。As shown in FIG. 2, the core 1 of the transformer is made of a magnetic material such as ferrite. A pair of C-shaped cores 3 are butted against each other, and an I-shaped core 4 is provided between central inner peripheral walls of the C-shaped core 3. It is fixed by interposing a gap spacer 5 therebetween, and is integrated by the connecting portions 12 and 13.

【0010】 前記トランスのボビン2は、前記I字形コア4を挿入する開口を有する角筒と 、角筒の外周面の両端と両端面間を5分割する6個の鍔と、ボビン2の両端の鍔 の同一方向の上端に開口方向に外向きに突出した矩形の端子接続部7とよりなる 前記トランスの1次コイルN1は前記ボビン2の中央のツバに巻回したのち端 子板8の端子に接続され、同一の巻数の2次コイルN21,N22はボビンの中 央の1次巻線の両側に設けた鍔内に巻回したのちボビン2の両端に設けた端子接 続部7に接続される。The bobbin 2 of the transformer has a square tube having an opening into which the I-shaped core 4 is inserted, six flanges that divide the outer peripheral surface of the square tube into five ends, and both ends of the bobbin 2. The primary coil N1 of the transformer, which is composed of a rectangular terminal connecting portion 7 protruding outward in the opening direction at the upper end of the collar in the same direction, is wound around the central brim of the bobbin 2 and then of the terminal plate 8. The secondary coils N21 and N22, which are connected to the terminals and have the same number of turns, are wound inside the collars provided on both sides of the primary winding in the center of the bobbin, and then connected to the terminal connection portions 7 provided on both ends of the bobbin 2. Connected.

【0011】 次に本考案の第2の実施例を図3に基づいて説明する。バックライト用トラン スは図3に示すコア1aとボビン2aと1次コイルN1aと2次コイルN21a 、N22aとで構成される。Next, a second embodiment of the present invention will be described with reference to FIG. The backlight transformer is composed of a core 1a, a bobbin 2a, a primary coil N1a, and secondary coils N21a and N22a shown in FIG.

【0012】 前記トランスのコア1aは、フェライト等の磁性体からなり、O字形コア8a の内周面壁間にギャップ用スペ−サ−5aを介在させたI字形コア4aとで構成 される。The core 1a of the transformer is made of a magnetic material such as ferrite, and is composed of an O-shaped core 8a and an I-shaped core 4a in which a gap spacer 5a is interposed between the inner peripheral wall of the O-shaped core 8a.

【0013】 前記ボビン2aと1次コイルN1aと2次コイルN21a,N22aは第一の 実施例と同様である。The bobbin 2a, the primary coil N1a, and the secondary coils N21a and N22a are the same as those in the first embodiment.

【0014】 次に本考案の第3の実施例を図4に基づいて説明する。バックライト用トラン スは図4に示すコア1bとボビン2bと1次コイルN1bと2次コイルN21b 、N22bとで構成される。Next, a third embodiment of the present invention will be described with reference to FIG. The backlight transformer is composed of a core 1b, a bobbin 2b, a primary coil N1b, and secondary coils N21b and N22b shown in FIG.

【0015】 前記トランスのコア1bは、フェライト等の磁性体からなり、一対のE字形コ ア3bを互いに突き合わせてなるものであり、E字形コア3bの中央の脚部にギ ャップ5bを形成している。The core 1b of the transformer is made of a magnetic material such as ferrite and has a pair of E-shaped cores 3b butted against each other. A gap 5b is formed on the central leg of the E-shaped core 3b. ing.

【0016】 前記ボビン2bと1次コイルN1bと2次コイルN21b,N22bは第一の 実施例と同様である。The bobbin 2b, the primary coil N1b, and the secondary coils N21b and N22b are the same as those in the first embodiment.

【0017】[0017]

【考案の効果】[Effect of device]

請求項1記載のバックライト用トランスは、C字形コア−を突き合わせて構成 されるO字形の外方磁路と、両C字形コア−の中央内周壁間に同一のギャップを 形成して配置されるI字形コア−で構成される内方磁路とより構成される内鉄形 鉄心と、鉄心の線対称中心位置となるI字形コア−の中央に配置された1次巻線 と、鉄心の線対称中心に関して対称位置をとるようにI字形コア−上の1次巻線 の両側に振り分けて配置された一対の2次巻線とで構成されているので、1次巻 線に通電すると閉磁路に沿って磁束が発生し2次コイルに起電力が誘起されるが 起電力のバラツキが小さくなり、冷陰極ランプの輝度のバラツキが無くなる。 The transformer for backlight according to claim 1 is arranged such that an O-shaped outer magnetic path formed by abutting C-shaped cores and a central inner peripheral wall of both C-shaped cores form the same gap. An inner iron core composed of an inner magnetic path composed of an I-shaped core, a primary winding arranged at the center of the I-shaped core at the center of line symmetry of the iron core, and an iron core It is composed of a pair of secondary windings arranged on both sides of the primary winding on the I-shaped core so as to be symmetric with respect to the center of line symmetry. A magnetic flux is generated along the path and an electromotive force is induced in the secondary coil, but the variation in electromotive force is reduced and the variation in brightness of the cold cathode lamp is eliminated.

【0018】 請求項2記載のバックライト用トランスは、請求項1記載の一対のC字形コア をO字形コアに変更しその他は同一の構成としているので、請求項1と同様の効 果がある。The backlight transformer according to claim 2 has the same effect as that of claim 1, since the pair of C-shaped cores according to claim 1 are changed to O-shaped cores and the other configurations are the same. .

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案の第1の実施例を示すもので、(a) は底
面図で、(b) は平面図を示す。
FIG. 1 shows a first embodiment of the present invention, (a) is a bottom view and (b) is a plan view.

【図2】図1の実施例のコアの構成を示す分解斜視図で
ある。
FIG. 2 is an exploded perspective view showing the configuration of the core of the embodiment of FIG.

【図3】本考案の第2の実施例を示す平面図である。FIG. 3 is a plan view showing a second embodiment of the present invention.

【図4】本考案の第3の実施例を示す平面図である。FIG. 4 is a plan view showing a third embodiment of the present invention.

【図5】バックライトの点灯回路図である。FIG. 5 is a lighting circuit diagram of a backlight.

【図6】従来例の平面図である。FIG. 6 is a plan view of a conventional example.

【符号の説明】[Explanation of symbols]

1,1a,1b,1c コア 2,2a,2b,2c ボビン 3 Cコア 4 Iコア 5,5a,5b,5c ギャップ N1,N1a,N1b,N1c 1次コイル N21,N21a,N21b,N21c 2次コイル N22,N22a,N22b,N22c 2次コイル 1, 1a, 1b, 1c core 2, 2a, 2b, 2c bobbin 3 C core 4 I core 5, 5a, 5b, 5c gap N1, N1a, N1b, N1c primary coil N21, N21a, N21b, N21c secondary coil N22, N22a, N22b, N22c Secondary coil

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 2灯の冷陰極ランプを点灯する点灯装
置に用いられる発振トランスであって、C字形コア−を
突き合わせて構成されるO字形の外方磁路と、両C字形
コア−の中央内周壁間に同一のギャップを形成して配置
されるI字形コア−で構成される内方磁路とより構成さ
れる内鉄形鉄心と、鉄心の線対称中心位置となるI字形
コア−の中央に配置された1次巻線と、鉄心の線対称中
心に関して対称位置をとるようにI字形コア−上の1次
巻線の両側に振り分けて配置された一対の2次巻線とで
構成され、一対の2次巻線の両端電圧がそれぞれ一対の
放電ランプに印加されることを特徴とするバックライト
用トランス。
1. An oscillating transformer used in a lighting device for lighting two cold cathode lamps, comprising an O-shaped outer magnetic path formed by abutting C-shaped cores, and both C-shaped cores. An inner iron core made up of an inner magnetic path composed of an I-shaped core arranged with the same gap formed between the central inner peripheral walls, and an I-shaped core at the center of line symmetry of the iron core. Of the primary winding and a pair of secondary windings arranged on both sides of the primary winding on the I-shaped core so as to be symmetrical with respect to the center of line symmetry of the iron core. A backlight transformer characterized in that a voltage across a pair of secondary windings is applied to a pair of discharge lamps.
【請求項2】 O字形の外方磁路と、O字形の外方磁
路内に同一のギャップを形成して配置されるI字形コア
−で構成される内方磁路とより構成される内鉄形鉄心よ
りなる請求項1記載のバックライト用トランス。
2. An O-shaped outer magnetic path, and an inner magnetic path composed of an I-shaped core arranged with the same gap formed in the O-shaped outer magnetic path. The transformer for a backlight according to claim 1, which comprises an inner iron core.
【請求項3】 C字形コア−と、C字形コア−の開口
端に同一のギャップを形成して配置されるI字形コア−
とより構成される外鉄形鉄心よりなる請求項1記載のバ
ックライト用トランス。
3. A C-shaped core and an I-shaped core arranged with the same gap formed at the open ends of the C-shaped core.
The transformer for a backlight according to claim 1, wherein the transformer comprises an outer iron core.
JP5265493U 1993-09-29 1993-09-29 Backlight transformer Pending JPH0722528U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5265493U JPH0722528U (en) 1993-09-29 1993-09-29 Backlight transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5265493U JPH0722528U (en) 1993-09-29 1993-09-29 Backlight transformer

Publications (1)

Publication Number Publication Date
JPH0722528U true JPH0722528U (en) 1995-04-21

Family

ID=12920851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5265493U Pending JPH0722528U (en) 1993-09-29 1993-09-29 Backlight transformer

Country Status (1)

Country Link
JP (1) JPH0722528U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004087659A (en) * 2002-08-26 2004-03-18 Sumida Technologies Inc High voltage transformer
KR101306587B1 (en) * 2012-02-02 2013-09-10 (주)하이템 Sapphire ingot crucible shell-type transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004087659A (en) * 2002-08-26 2004-03-18 Sumida Technologies Inc High voltage transformer
KR101306587B1 (en) * 2012-02-02 2013-09-10 (주)하이템 Sapphire ingot crucible shell-type transformer

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