CN1797923A - 用于逆变器的驱动电路 - Google Patents

用于逆变器的驱动电路 Download PDF

Info

Publication number
CN1797923A
CN1797923A CNA2005100777618A CN200510077761A CN1797923A CN 1797923 A CN1797923 A CN 1797923A CN A2005100777618 A CNA2005100777618 A CN A2005100777618A CN 200510077761 A CN200510077761 A CN 200510077761A CN 1797923 A CN1797923 A CN 1797923A
Authority
CN
China
Prior art keywords
ground connection
inverter
voltage
drive circuit
transformer
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.)
Granted
Application number
CNA2005100777618A
Other languages
English (en)
Other versions
CN100486092C (zh
Inventor
田镇焕
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.)
LG Display Co Ltd
Original Assignee
LG Philips LCD Co 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 LG Philips LCD Co Ltd filed Critical LG Philips LCD Co Ltd
Publication of CN1797923A publication Critical patent/CN1797923A/zh
Application granted granted Critical
Publication of CN100486092C publication Critical patent/CN100486092C/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H05B41/2825—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Inverter Devices (AREA)
  • Dc-Dc Converters (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Liquid Crystal (AREA)

Abstract

一种用于逆变器的驱动电路包括：整流/滤波单元，其对输入的交流电压进行整流并滤波，以产生直流电压；以及直流/交流转换器，其把来自整流/滤波单元的直流电压逆变成高于第一交流电压的第二交流电压。

Description

用于逆变器的驱动电路
本申请要求2004年12月30日在韩国专利局申请的韩国专利申请No.2004-0116314的权益，在此引用该申请的全部内容作为参考。
技术领域
本发明涉及一种用于逆变器的驱动电路，特别涉及一种具有低功耗的逆变器。
背景技术
液晶显示器件包括彼此相对并粘结在一起的上基板和下基板，液晶层设置在上基板和下基板之间。在上基板上形成透射特定波长光的滤色片层和产生电场的公共电极。在下基板上形成彼此交叉的栅线和数据线、用作开关元件的薄膜晶体管、以及用于产生电场的像素电极。通过应用液晶分子的光学各向异性和极化性质，液晶显示器件进行工作。液晶分子具有分子排列方向，从而可通过向液晶分子施加电场来控制其方向。也就是说，通过开关薄膜晶体管向液晶分子施加电场改变液晶分子的排列方向，从而控制光的透射率。光透过液晶分子，然后透过滤色片，由此液晶显示器件显示图像。
液晶显示器件为使用光源的非发光型显示器件。例如，冷阴极荧光灯(CCFL)用作光源，该灯是由逆变器驱动。液晶显示器件的CCFL可以用约840V的交流(AC)电压驱动。
如图1所示，用于逆变器100的驱动电路被划分成整流/滤波单元(rectification/smoothing unit)、直流/直流转换器(DC/DC转换器)、以及直流/交流逆变器(DC/AC逆变器)。当输入220V交流电时，具有桥式整流器110的整流/滤波单元对220V交流进行电整流并滤波，以产生311V的直流电。当采用节能电路(未示出)的功率因素补偿(PFC)功能以提高功效时，可以将220V交流电整流并滤波为400V直流电。因此，可以输入到整流/滤波单元的220V交流电可以整流并滤波为311V或400V直流电。然后，通过具有开关电源变压器(SMPS变压器)120的DC/DC转换器，把311V或400V直流电转换成12V～24V直流电，然后输入到DC/AC逆变器中。然后，通过具有变压器130的DC/AC逆变器，把12V～24V直流电转换成用于驱动灯140的840V交流电，从而驱动灯140。变压器130通常为磁性变压器。
用于逆变器100的驱动电路的接地被SMPS变压器120分成热接地(hotground)和冷接地(cold ground)。冷接地通常可被称为接地。热接地为用于由交流电压整流和滤波后得到的直流电压的接地，可以使人体免受伤害。热接地和冷接地之间的电压差可约为100V。
根据现有技术的用于逆变器的驱动电路具有通过两个变压器120和130的两级转换，并且通过每级消耗功率。更具体地说，通过整流/滤波单元的效率为95％，通过DC/DC转换器的效率为90％，而通过DC/AC逆变器的效率为76.4％。
发明内容
以下描述具有低功耗的用于逆变器的驱动电路。
一种用于逆变器的驱动电路包括：整流/滤波单元，其对输入的交流电压进行整流和滤波，以产生直流电压；以及直流/交流转换器，其将来自整流/滤波单元的直流电压逆变为高于第一交流电压的第二交流电压。
附图说明
图1为说明根据现有技术的用于逆变器的驱动电路的视图；以及
图2为说明根据实施例的用于逆变器的驱动电路的视图。
具体实施方式
参照附图可以更好地理解实施例，但这些实施例并不会限制本发明。
如图2所示，用于逆变器200的驱动电路被划分成整流/滤波单元260和DC/AC逆变器250。整流/滤波单元260具有使用二极管的桥式整流器210，而DC/AC逆变器250具有变压器230。当输入220V交流电时，整流/滤波单元使用电容器212对220V交流电进行整流和滤波，以产生311V直流电。当使用节能电路(未示出)的功率因素补偿(PFC)功能以提高功效时，可把220V交流电整流并滤波成400V直流电。因此，可以将输入到整流/滤波单元260的220V交流整流并滤波成311V或400V直流电。然后，把直流电压直接输入DC/AC逆变器250。由此，通过DC/AC逆变器250，把311V或400V直流电转换成用于驱动灯240的840V交流电，从而驱动灯240。
此描述是基于使用大约220V的交流输入电压，该输入电压可以见于除美国之外的各国家的电力系统中，然而，大约115V交流电的输入电压用作设计基础对于本领域的技术人员也是可以理解的。在这样的情形下，整流/滤波单元260的输出电压会与输入电压的减少成比例的减少，并且在DC/AC逆变器中的电压增加相应地增加，以得到需要的输出电压。
用于逆变器200的驱动电路的接地可以被DC/AC逆变器的变压器230分成热接地和冷接地。冷接地可通常被称为接地。热接地为用于交流电压整流和滤波得到的直流电压的接地，可以使人体免受伤害。热接地和冷接地之间的电压差可约为100V。应当减少热接地和冷接地之间的电压差，以平稳地驱动用于逆变器200的驱动电路。为了做到这点，可以使用电容器214和电阻器216连接热接地和冷接地。由此，可以用一级驱动根据本发明实施例的用于逆变器的驱动电路，从而可减少功耗。
此外，根据该实施例，变压器230为压电变压器，其比磁性变压器的效率更高、损耗更小。因此，DC/AC逆变器的输入电压增加，效率提高。为了驱动灯240需要超过约840V的交流电压。由于把通过整流/滤波单元得到的311V或400V直流电输入到DC/AC逆变器中，因此不需要增压变压器就可以使用压电变压器230。因此，通过具有95％效率的整流/滤波单元和具有85％效率的DC/AC逆变器驱动具有根据该实施例的用于逆变器的驱动电路的灯240。从而，效率提高了约15％。
对于本领域普通技术人员来说显而易见的是，可对本发明做出各种修改或变型。因此，本发明的意图是，只要本发明的变化和改进落在所附权利要求及其等效范围之内，本发明就涵盖了这些改进和变化。

Claims (15)

1、一种用于逆变器的驱动电路，包括：
整流/滤波单元，其对输入的交流电压进行整流并滤波，以产生直流电压；以及
直流/交流转换器，其将来自整流/滤波单元的直流电压逆变成高于第一交流电压的第二交流电压。
2、根据权利要求1所述的驱动电路，其特征在于，所述整流/滤波单元进一步包括桥式整流器。
3、根据权利要求1所述的驱动电路，其特征在于，所述直流/交流逆变器进一步包括变压器。
4、根据权利要求3所述的驱动电路，其特征在于，所述变压器为压电变压器。
5、根据权利要求3所述的驱动电路，其特征在于，进一步包括第一接地和第二接地，其分别设置在所述变压器的输入侧和输出侧。
6、根据权利要求5所述的驱动电路，其特征在于，所述第一接地和第二接地通过电容器和电阻器相连接。
7、根据权利要求5所述的驱动电路，其特征在于，所述第二接地是用于交流电压的接地，所述第一接地是用于直流电压的接地。
8、根据权利要求1所述的驱动电路，其特征在于，所述第一交流电压约为220V，直流电压约为311V或400V，第二交流电压约为840V。
9、根据权利要求1所述的驱动电压，其特征在于，所述第一交流电压约为110V，直流电压约为155V或200V，而第二交流电压约为840V。
10、一种显示器件，包括：
液晶显示器件；
灯；以及
灯驱动电路，包括整流器和直流/交流逆变器；
其中，所述直流/交流逆变器的输出电压比所述整流器的输入电压更大。
11、根据权利要求10所述的显示器件，其特征在于，所述直流/交流逆变器进一步包括变压器。
12、根据权利要求11所述的显示器件，其特征在于，所述变压器为压电变压器。
13、根据权利要求11所述的显示器件，其特征在于，进一步包括分别设置在变压器的输入侧和输出侧的第一接地和第二接地。
14、根据权利要求13所述的显示器件，其特征在于，所述第一接地和第二接地通过电容器和电阻器相连接。
15、根据权利要求13所述的显示器件，其特征在于，所述第二接地为用于交流电压的接地，所述第一接地为用于直流电压的接地。
CNB2005100777618A 2004-12-30 2005-06-24 用作逆变器的驱动电路及显示器件 Expired - Fee Related CN100486092C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040116314 2004-12-30
KR1020040116314A KR101101791B1 (ko) 2004-12-30 2004-12-30 인버터 구동회로

Publications (2)

Publication Number Publication Date
CN1797923A true CN1797923A (zh) 2006-07-05
CN100486092C CN100486092C (zh) 2009-05-06

Family

ID=36599497

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2005100777618A Expired - Fee Related CN100486092C (zh) 2004-12-30 2005-06-24 用作逆变器的驱动电路及显示器件

Country Status (6)

Country Link
US (1) US7378801B2 (zh)
JP (1) JP4195459B2 (zh)
KR (1) KR101101791B1 (zh)
CN (1) CN100486092C (zh)
DE (1) DE102005030674B4 (zh)
TW (1) TWI297879B (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7911463B2 (en) * 2005-08-31 2011-03-22 O2Micro International Limited Power supply topologies for inverter operations and power factor correction operations
US7663322B2 (en) * 2007-07-20 2010-02-16 Samsung Electro-Mechanics Co., Ltd. Backlight driving system for liquid crystal display
JP2009290919A (ja) * 2008-05-27 2009-12-10 Panasonic Corp 電力変換装置
KR101128377B1 (ko) * 2010-05-25 2012-03-23 고은순 전력품질개선 기능을 갖는 전기에너지 절전장치
DE102015010233A1 (de) * 2015-08-12 2017-02-16 Airbus Defence and Space GmbH Mikroelektronisches Modul, Modularray und Verfahren zur Strömungsbeeinflussung
DE102015014256B4 (de) 2015-11-05 2020-06-18 Airbus Defence and Space GmbH Mikroelektronisches Modul zur Reinigung einer Oberfläche, Modularray und Verfahren zur Reinigung einer Oberfläche
DE102016008945A1 (de) 2016-07-26 2018-02-01 Airbus Defence and Space GmbH Mikroelektrisches Modul zur Veränderung der elektromagnetischen Signatur einer Oberfläche, Modularray und Verfahren zur Veränderung der elektromagnetischen Signatur einer Oberfläche
KR102673597B1 (ko) * 2018-09-12 2024-06-12 삼성전자주식회사 디스플레이 시스템, 디스플레이 장치 및 그 제어 방법
KR102646067B1 (ko) 2019-07-17 2024-03-12 삼성전자주식회사 전자 장치, 그 제어 방법 및 디스플레이 장치

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548189A (en) * 1992-03-26 1996-08-20 Linear Technology Corp. Fluorescent-lamp excitation circuit using a piezoelectric acoustic transformer and methods for using same
JPH0845679A (ja) * 1994-08-01 1996-02-16 Nobumi Hagiwara 冷陰極管点灯装置
JPH0993959A (ja) 1995-09-27 1997-04-04 Nagano Japan Radio Co インバ−タ装置
JPH09233851A (ja) 1996-02-23 1997-09-05 Nec Kansai Ltd 高電圧電源
TW349278B (en) 1996-08-29 1999-01-01 Nihon Cement Control circuit and method for piezoelectric transformer
JPH10108479A (ja) 1996-09-25 1998-04-24 Toshiba Lighting & Technol Corp 定電流プッシュプルインバータ、放電ランプ点灯装置および照明装置
US6121732A (en) * 1997-05-06 2000-09-19 Inshore Holdings, Llc Neon lamp power supply for producing a bubble-free discharge without promoting mercury migration or premature core saturation
DE19853657A1 (de) 1998-11-20 2000-05-31 Vogt Electronic Ag Vorschaltgerät für fluoreszierende Kaltkathodenlampen (CCFL)
JP3226036B2 (ja) 1999-05-12 2001-11-05 サンケン電気株式会社 インバータ装置
US6804129B2 (en) * 1999-07-22 2004-10-12 02 Micro International Limited High-efficiency adaptive DC/AC converter
US6259615B1 (en) * 1999-07-22 2001-07-10 O2 Micro International Limited High-efficiency adaptive DC/AC converter
KR100878222B1 (ko) * 2001-07-03 2009-01-13 삼성전자주식회사 액정 표시 장치용 전원 공급 장치
US6936975B2 (en) 2003-04-15 2005-08-30 02Micro International Limited Power supply for an LCD panel
JP2006024511A (ja) * 2004-07-09 2006-01-26 Minebea Co Ltd 放電灯点灯装置

Also Published As

Publication number Publication date
KR20060077456A (ko) 2006-07-05
US20060145630A1 (en) 2006-07-06
US7378801B2 (en) 2008-05-27
CN100486092C (zh) 2009-05-06
KR101101791B1 (ko) 2012-01-05
DE102005030674B4 (de) 2010-11-18
TWI297879B (en) 2008-06-11
TW200622972A (en) 2006-07-01
JP2006191786A (ja) 2006-07-20
DE102005030674A1 (de) 2006-07-13
JP4195459B2 (ja) 2008-12-10

Similar Documents

Publication Publication Date Title
CN100486092C (zh) 用作逆变器的驱动电路及显示器件
US7319600B2 (en) Apparatus for supplying power and liquid crystal display having the same
CN102065600A (zh) 一种led调光驱动系统
CN103024982B (zh) 发光二极管照明设备
TWI280536B (en) Controller and driver architecture for double-ended circuitry for powering cold cathode fluorescent lamps
CN107147316A (zh) 一种交流电源电路及其控制方法
US7518317B2 (en) Backlight driving and control circuit with an isolated power factor correction structure
CN1690777A (zh) 用于液晶显示设备的电源系统新架构
CN2696271Y (zh) 市网高压供电的冷阴极荧光灯电源
CN200969207Y (zh) 液晶显示屏一体化背光源驱动器
CN1681190A (zh) 具备功率因素校正的反流器电路
CN105792444B (zh) Led驱动电路
CN200962172Y (zh) 一种背光模组
TWI364733B (en) Voltage clamp and power recycle circuit
CN2469654Y (zh) 多灯管同时启亮式电子镇流器
CN109152124A (zh) 一种大功率电源装置
TWI221080B (en) Integrated power supply device for information appliance
JP4706534B2 (ja) 照明装置
CN101179894A (zh) 换流器及背光模组的驱动装置
CN1971363A (zh) 背光组件、换流器及其直流电压产生方法
TWI413100B (zh) 電源電路
JP4190948B2 (ja) 整合式情報家電電源供給装置
CN2743863Y (zh) 集成式液晶显示设备电源装置
CN1416305A (zh) 电源装置及其使用的换流器
CN2604023Y (zh) 荧光灯电子逆变器辅助电源

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090506

Termination date: 20200624

CF01 Termination of patent right due to non-payment of annual fee