JP4585747B2 - 液晶表示装置及びそのバックライト駆動装置 - Google Patents
液晶表示装置及びそのバックライト駆動装置 Download PDFInfo
- Publication number
- JP4585747B2 JP4585747B2 JP2003276979A JP2003276979A JP4585747B2 JP 4585747 B2 JP4585747 B2 JP 4585747B2 JP 2003276979 A JP2003276979 A JP 2003276979A JP 2003276979 A JP2003276979 A JP 2003276979A JP 4585747 B2 JP4585747 B2 JP 4585747B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- liquid crystal
- crystal display
- lamps
- display device
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Liquid Crystal (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Inverter Devices (AREA)
- Planar Illumination Modules (AREA)
Description
200 色フィルター表示板
300 液晶表示板組立体
350 バックライト装置
351、352 ランプ部
351a、351b、352a、352b ランプ
353 導光板
354、355 ランプカバー
356 光学シート
357 反射板
420 ゲート用テープキャリアパッケージ
450 ゲート印刷回路基板
520 データ用テープキャリアパッケージ
550 データ印刷回路基板
900 インバータ
910 駆動部
911 制御回路
912 スイッチング駆動部
920 制御部
921 フィードバック制御部
922 電圧センシング部
923 オン/オフ制御部
Claims (10)
- 発光のための第1及び第2ランプと、
2次側の第1端が前記第1ランプに連結される第1変圧器と、
2次側の第2端が前記第2ランプに連結され、第1端が前記第1変圧器の2次側の第2端と連結されて中性点が形成される第2変圧器と、
直流電力を交流に変換して前記第1及び第2変圧器の1次側に供給する駆動部と、
前記中性点の電圧を検知するための電圧センシング部と、
を含み、前記電圧センシング部で検知した電圧が基準レベルより大きければ、前記駆動部の動作を停止することを特徴とする液晶表示装置のバックライト駆動装置。 - 前記中性点の電圧を分圧するための分圧回路をさらに含み、
前記電圧センシング部は、前記分圧回路によって前記中性点の分圧された電圧を検知する、請求項1に記載の液晶表示装置のバックライト駆動装置。 - 前記分圧回路は、前記中性点に直列に連結された第1及び第2抵抗を含む、請求項2に記載の液晶表示装置のバックライト駆動装置。
- 前記電圧センシング部で検知した電圧に応じて前記駆動部に動作停止信号を供給するオン/オフ制御部をさらに含む、請求項1に記載の液晶表示装置のバックライト駆動装置。
- 前記第1及び第2ランプに流れる電流を検出して前記オン/オフ制御部を制御するフィードバック制御部をさらに含む、請求項4に記載の液晶表示装置のバックライト駆動装置。
- 前記第1及び第2ランプは各々単一ランプからなる、請求項1に記載の液晶表示装置のバックライト駆動装置。
- 前記第1及び第2ランプは各々直列連結された複数のランプを備える、請求項1に記載の液晶表示装置のバックライト駆動装置。
- 前記第1及び第2ランプに各々連結された第1及び第2抵抗をさらに含み、
前記第1及び第2抵抗は互いに連結されて接地されている、請求項1に記載の液晶表示装置のバックライト駆動装置。 - 前記第1及び第2変圧器の1次側は前記駆動部に並列に連結される、請求項1に記載の液晶表示装置のバックライト駆動装置。
- 発光用の少なくとも一つの第1及び第2ランプ、前記第1及び第2ランプに2次側が各々連結され、前記第1及び第2ランプを駆動するための交流電力を伝達する第1及び第2変圧器、及び前記第1及び第2変圧器の1次側に電力を供給する駆動部を含むバックライト装置;
前記バックライト装置で発生した光の透過率を調節して映像を表示するための液晶を備える液晶表示板組立体;を含み、
前記第1及び第2変圧器の2次側は互いに連結されて中性点を形成し、
前記バックライト装置は、前記中性点の電圧を検知する電圧センシング部をさらに含み、前記電圧センシング部で検知した電圧が基準レベルより大きければ、前記駆動部を動作停止することを特徴とする液晶表示装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020020042935A KR100864499B1 (ko) | 2002-07-22 | 2002-07-22 | 액정 표시 장치 및 그 백라이트 구동 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004054294A JP2004054294A (ja) | 2004-02-19 |
JP4585747B2 true JP4585747B2 (ja) | 2010-11-24 |
Family
ID=31944834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003276979A Expired - Fee Related JP4585747B2 (ja) | 2002-07-22 | 2003-07-18 | 液晶表示装置及びそのバックライト駆動装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7221345B2 (ja) |
JP (1) | JP4585747B2 (ja) |
KR (1) | KR100864499B1 (ja) |
CN (1) | CN100422821C (ja) |
TW (1) | TWI366031B (ja) |
Families Citing this family (22)
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JP2004317610A (ja) * | 2003-04-14 | 2004-11-11 | Pioneer Electronic Corp | 表示パネル駆動装置 |
KR100953429B1 (ko) * | 2003-08-11 | 2010-04-20 | 삼성전자주식회사 | 램프 구동 방법 및 그 장치와, 이를 갖는 백라이트어셈블리 및 액정 표시 장치 |
KR100577998B1 (ko) * | 2003-11-12 | 2006-05-11 | 엘지.필립스 엘시디 주식회사 | 램프의 구동장치와 이를 가지는 액정표시장치 |
KR100595313B1 (ko) * | 2004-03-15 | 2006-07-03 | 엘지.필립스 엘시디 주식회사 | 백라이트 유닛의 램프 점등장치 |
KR101133752B1 (ko) | 2004-06-04 | 2012-04-09 | 삼성전자주식회사 | 표시 장치용 광원의 구동 장치 및 표시 장치 |
CN1735312A (zh) * | 2004-08-11 | 2006-02-15 | 皇家飞利浦电子股份有限公司 | 用于消除电弧的装置及方法 |
US7554273B2 (en) * | 2006-09-05 | 2009-06-30 | O2Micro International Limited | Protection for external electrode fluorescent lamp system |
US7126289B2 (en) * | 2004-08-20 | 2006-10-24 | O2 Micro Inc | Protection for external electrode fluorescent lamp system |
KR100668083B1 (ko) | 2004-11-05 | 2007-01-11 | 삼성전자주식회사 | 백라이트 구동장치 |
KR101152503B1 (ko) * | 2005-06-24 | 2012-06-01 | 엘지디스플레이 주식회사 | 저전압 구동 백라이트용 램프 |
WO2007018071A1 (ja) * | 2005-08-05 | 2007-02-15 | Sharp Kabushiki Kaisha | 表示装置用照明装置及び表示装置 |
KR100854840B1 (ko) * | 2005-08-31 | 2008-08-27 | 엘지전자 주식회사 | 액정표시기의 인버터 전류 제어 장치 |
US7746330B2 (en) * | 2005-12-22 | 2010-06-29 | Au Optronics Corporation | Circuit and method for improving image quality of a liquid crystal display |
KR100645082B1 (ko) * | 2006-03-08 | 2006-11-13 | 최일완 | 산업폐기물 재활용방법 및 이에 사용되는 성형물 성형장치 |
CN101174383B (zh) * | 2006-11-02 | 2011-06-08 | 惠浦电子(深圳)有限公司 | 一种显示装置控制电路 |
TW200839692A (en) * | 2007-03-21 | 2008-10-01 | Delta Electronics Inc | Liquid crystal display apparatus, backlight module and light source driving device thereof |
KR101308979B1 (ko) | 2007-03-29 | 2013-09-17 | 삼성디스플레이 주식회사 | 백라이트 인버터 및 그것을 사용하는 액정 표시 장치 |
KR101083384B1 (ko) * | 2007-04-19 | 2011-11-14 | 스미다 코포레이션 가부시키가이샤 | 방전관 구동 장치 |
US8058809B2 (en) * | 2007-07-02 | 2011-11-15 | O2Micro, Inc. | Circuits and methods for balancing current among multiple loads |
JP2009104960A (ja) * | 2007-10-24 | 2009-05-14 | Sumida Corporation | 異常検出回路 |
CN101465102B (zh) * | 2007-12-18 | 2012-10-10 | 瑞鼎科技股份有限公司 | 用于驱动液晶显示器的驱动装置及方法 |
KR101539581B1 (ko) * | 2009-01-15 | 2015-07-27 | 삼성디스플레이 주식회사 | 광원 구동 방법, 이를 수행하기 위한 광원 어셈블리 및 이를 갖는 액정 표시 장치 |
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2002
- 2002-07-22 KR KR1020020042935A patent/KR100864499B1/ko not_active IP Right Cessation
-
2003
- 2003-07-18 JP JP2003276979A patent/JP4585747B2/ja not_active Expired - Fee Related
- 2003-07-21 US US10/626,758 patent/US7221345B2/en not_active Expired - Fee Related
- 2003-07-22 TW TW092119972A patent/TWI366031B/zh not_active IP Right Cessation
- 2003-07-22 CN CNB031649386A patent/CN100422821C/zh not_active Expired - Fee Related
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JPH07281149A (ja) * | 1994-04-11 | 1995-10-27 | Citizen Watch Co Ltd | 照明装置 |
JPH09167689A (ja) * | 1995-12-14 | 1997-06-24 | Ratsukurando:Kk | 高周波インバータ応用の蛍光灯の点灯装置 |
JP2000029550A (ja) * | 1998-05-26 | 2000-01-28 | O 2 Micro Inc | 冷陰極蛍光ランプ付勢回路 |
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Also Published As
Publication number | Publication date |
---|---|
JP2004054294A (ja) | 2004-02-19 |
CN100422821C (zh) | 2008-10-01 |
KR100864499B1 (ko) | 2008-10-20 |
CN1495488A (zh) | 2004-05-12 |
TWI366031B (en) | 2012-06-11 |
KR20040009103A (ko) | 2004-01-31 |
US7221345B2 (en) | 2007-05-22 |
US20040056830A1 (en) | 2004-03-25 |
TW200410012A (en) | 2004-06-16 |
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