JP4101228B2 - 面光源用放電管並列点灯システム - Google Patents
面光源用放電管並列点灯システム Download PDFInfo
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- JP4101228B2 JP4101228B2 JP2004326485A JP2004326485A JP4101228B2 JP 4101228 B2 JP4101228 B2 JP 4101228B2 JP 2004326485 A JP2004326485 A JP 2004326485A JP 2004326485 A JP2004326485 A JP 2004326485A JP 4101228 B2 JP4101228 B2 JP 4101228B2
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- cold cathode
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- 239000004973 liquid crystal related substance Substances 0.000 description 14
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- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
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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
- H05B41/2825—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 bridge converter in the final stage
- H05B41/2827—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 bridge 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
- H05B41/245—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency for a plurality of lamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
- F21K2/06—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence
- F21K2/08—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence activated by an electric field, i.e. electrochemiluminescence
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Inverter Devices (AREA)
- Liquid Crystal (AREA)
Description
静電ノイズを減少させるには、隣り合う冷陰極管同士を逆位相の出力で駆動することによって静電ノイズを相殺することが有効とされる。図15ないし図17に示すものがその一例であるが、このように冷陰極管を駆動するためには、逆位相で駆動する冷陰極管2本を一つのセットとし、逆位相の出力を持つトランスにより冷陰極管2本ごとに一つのトランスを設けて駆動する。
図1は、本発明の一実施例を示す両側高電圧駆動の回路構成図であって、反転制御回路とSW回路はインバータ回路の発振回路と昇圧トランスの駆動回路であり、一般的に使用されるインバータ回路は全て適用できる。
前記CD1及びCD2は本発明の発明者の一人により特願2004−003740(US特許出願公開2004−0155596−A1)発明として開示された分流モジュールである。
ただし、この場合に用いられる分流トランスCDT1ないしCDT4には非常に大きな相互インダクタンス(具体的には倍以上の値)が必要となるため、相互インダクタンス値を大きく確保し、自己共振周波数を高く保ち、かつ、小型に構成するためには、冷陰極管に接続される側のコイルには、本願出願人の出願に係る特願2004−003740(US特許出願公開2004−0155596−A1)に開示する斜め巻き、或いは、特願2004−254129に開示するセクション巻きなどの巻線方法が必須となる。少なくとも特願2004−254129において従来方法として開示する積層巻きなどで構成する分流トランスでは実現し得ないことが確認されている。
〔作用〕
二つの逆位相出力を有するインバータ回路において、漏れインダクタンスと二次側回路の容量成分とで構成される共振回路は模式的に表すと図13のようになる。
該分流トランスCT1は、冷陰極管(負荷)DT1ないしDT8に流れる電流により発生する磁束が対向するように接続されているものとする。この場合、発生する磁束のほとんどは相殺されるので、該分流トランスCT1の巻線にはわずかな電圧しか生じなくなる。
Claims (4)
- 多数の放電管を有する面光源システムにおいて、放電管を並列点灯する分流モジュールを有し、該分流モジュールの入力端子と該放電管の該分流モジュールが接続された側とは反対側の電極は180度位相の異なる電圧波形によって駆動され、該面光源システムの逆位相の入力端子は2つの共振回路を結合する一つの分流トランスを介して逆位相の出力を有するインバータ回路に接続されることにより、該分流トランスのそれぞれの巻線に流れる電流により発生する磁束が相殺されるように接続され、
前記インバータ回路は両端高圧駆動して輝度ムラを防止するための2つの漏洩トランスのそれぞれの一端がアースされ、逆位相の電圧を出力するそれぞれの他端が、それぞれ一つの分流トランスの巻線を介して、一方が、放電管を並列点灯する分流モジュールの入力端子に接続され、他方が、分流モジュールを介して並列接続される複数の放電管の端子の反対側の端子に接続され、
前記インバータ回路は高圧で駆動されるものであって多数の放電管が並列点灯されることを特徴とする面光源用放電管並列点灯システム。 - 前記分流モジュールを、互いに隣り合う前記放電管の電極を一本置きに逆位相に駆動される構成に置き換えた面光源用放電管並列点灯システムにおいて、該分流モジュールは二群の分流モジュールに分けられ、それぞれの分流モジュールは同位相で駆動される電極同士を並列駆動するように接続された結果得られる逆位相の分流モジュールの入力端子をそれぞれに有し、該分流モジュールに接続された放電管の電極とは異なる端の電極は、同位相で駆動される電極同士を一つに束ねられる構成としたもう一方の入力端子を有し、該入力端子同士は同位相になるもの同士がさらに別の分流トランスを介して接続され、該分流トランスに発生する磁束はそれぞれの巻線に流れる電流により相殺されるように接続されてなる請求項1記載の面光源用放電管並列点灯システム。
- 前記逆位相の出力を有するインバータ回路を接続する分流トランスを、漏洩トランスのGND側端子とGNDとの間に介することによって、該分流トランスのそれぞれの巻線に流れる電流により発生する磁束が相殺されるように接続されてなる請求項1又は2記載の面光源用放電管並列点灯システム。
- 前記分流トランスのインバータ回路側及び面光源側にそれぞれ共振用コンデンサを分散配置し、該共振用コンデンサの値を適宜な値に調整することにより、該分流トランスに流れる電流の不均衡を補正し、該分流トランスの寸法形状を小型にすることを可能にした請求項1〜3のいずれかに記載の面光源用放電管並列点灯システム。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004326485A JP4101228B2 (ja) | 2004-03-19 | 2004-11-10 | 面光源用放電管並列点灯システム |
TW094102278A TWI269611B (en) | 2004-03-19 | 2005-01-26 | Parallel lighting system for surface light source discharge tube |
US11/081,545 US7391166B2 (en) | 2004-03-19 | 2005-03-17 | Parallel lighting system for surface light source discharge lamps |
KR1020050022373A KR20060044363A (ko) | 2004-03-19 | 2005-03-17 | 면광원용 방전관 병렬점등시스템 |
EP05251684A EP1581030B1 (en) | 2004-03-19 | 2005-03-18 | Parallel lighting system for surface light source discharge lamps |
CN200510055480.2A CN1671266A (zh) | 2004-03-19 | 2005-03-18 | 面光源用放电管并联点灯*** |
DE602005014411T DE602005014411D1 (de) | 2004-03-19 | 2005-03-18 | Beleuchtungseinrichtung für flächenartige Lichtquelle mit parallelen Entladungslampen |
US12/153,669 US7772785B2 (en) | 2004-03-19 | 2008-05-22 | Parallel lighting system for surface light source discharge lamps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004079571 | 2004-03-19 | ||
JP2004326485A JP4101228B2 (ja) | 2004-03-19 | 2004-11-10 | 面光源用放電管並列点灯システム |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007311966A Division JP4658110B2 (ja) | 2004-03-19 | 2007-12-03 | 面光源用放電管並列点灯システム |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005203347A JP2005203347A (ja) | 2005-07-28 |
JP2005203347A5 JP2005203347A5 (ja) | 2006-06-22 |
JP4101228B2 true JP4101228B2 (ja) | 2008-06-18 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2004326485A Expired - Fee Related JP4101228B2 (ja) | 2004-03-19 | 2004-11-10 | 面光源用放電管並列点灯システム |
Country Status (7)
Country | Link |
---|---|
US (2) | US7391166B2 (ja) |
EP (1) | EP1581030B1 (ja) |
JP (1) | JP4101228B2 (ja) |
KR (1) | KR20060044363A (ja) |
CN (1) | CN1671266A (ja) |
DE (1) | DE602005014411D1 (ja) |
TW (1) | TWI269611B (ja) |
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2004
- 2004-11-10 JP JP2004326485A patent/JP4101228B2/ja not_active Expired - Fee Related
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- 2005-01-26 TW TW094102278A patent/TWI269611B/zh not_active IP Right Cessation
- 2005-03-17 US US11/081,545 patent/US7391166B2/en not_active Expired - Fee Related
- 2005-03-17 KR KR1020050022373A patent/KR20060044363A/ko not_active Application Discontinuation
- 2005-03-18 DE DE602005014411T patent/DE602005014411D1/de active Active
- 2005-03-18 CN CN200510055480.2A patent/CN1671266A/zh active Pending
- 2005-03-18 EP EP05251684A patent/EP1581030B1/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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EP1581030B1 (en) | 2009-05-13 |
US20080231212A1 (en) | 2008-09-25 |
TW200537987A (en) | 2005-11-16 |
DE602005014411D1 (de) | 2009-06-25 |
JP2005203347A (ja) | 2005-07-28 |
US20050218827A1 (en) | 2005-10-06 |
TWI269611B (en) | 2006-12-21 |
US7772785B2 (en) | 2010-08-10 |
US7391166B2 (en) | 2008-06-24 |
KR20060044363A (ko) | 2006-05-16 |
CN1671266A (zh) | 2005-09-21 |
EP1581030A1 (en) | 2005-09-28 |
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