CN1989790A - 在换流期间生成同步的灯驱动器 - Google Patents

在换流期间生成同步的灯驱动器 Download PDF

Info

Publication number
CN1989790A
CN1989790A CNA2005800244950A CN200580024495A CN1989790A CN 1989790 A CN1989790 A CN 1989790A CN A2005800244950 A CNA2005800244950 A CN A2005800244950A CN 200580024495 A CN200580024495 A CN 200580024495A CN 1989790 A CN1989790 A CN 1989790A
Authority
CN
China
Prior art keywords
current
lamp driver
change
bridge
display system
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
CNA2005800244950A
Other languages
English (en)
Inventor
L·H·C·德布罗沃
P·J·齐尔斯特拉
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of CN1989790A publication Critical patent/CN1989790A/zh
Pending legal-status Critical Current

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
    • H05B41/288—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 and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2887—Static converters especially adapted therefor; Control thereof characterised by a controllable bridge in the final stage
    • 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
    • H05B41/288—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 and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • 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
    • 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
    • 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
    • H05B41/2828—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 control circuits for the switching elements
    • 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

  • Dc-Dc Converters (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Ac-Ac Conversion (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种灯驱动器，具有两个独立运行集成其中的半桥。一个半桥用作下变频器(1)，一个用作振荡器(2)。保证电流控制和倒置在单个相位中可实现，从而在换流瞬间产生同步。可包括用于检测下变频器(1)规定状态的检测装置(15，18)，这种情形中，只有在被请求并且规定状态已经检测到之后换流才进行。延迟电路(16)可保证如果请求时换流总是进行，即使规定状态没有检测到。

Description

在换流期间生成同步的灯驱动器
技术领域
本发明涉及灯驱动器，特别是涉及投影显示设备。更具体的，本发明涉及具有两个独立运行半桥的灯驱动器，灯驱动器适合于生成换流同步。
背景技术
现有技术灯驱动器通常包括一个用作振荡器的半桥，而电流控制通过连接到其前面的下变频器进行。这样的灯驱动器，例如在US5,828,187中公开。这些现有技术灯驱动器的不足在于下变频器和振荡器在换流瞬间不同步。因此，不可能有最优超调补偿，高峰值电流可在换流期间出现在切换设备中，由于硬切换可产生高电磁干扰(EMI)，和/或高切换损失可在换流中产生。
发明内容
本发明的一个目的在于提供灯驱动器，其中可能在换流瞬间于下变频器和振荡器之间生成同步，从而可以进行最优超调补偿。
根据本发明的第一方面，上述目的和其它目的可通过提供灯驱动器而实现，灯驱动器包括至少两个独立运行的集成其中的半桥，其中：
第一个所述半桥用作下变频器，从而确定灯驱动器的输出电流，并且
第二个所述半桥用作振荡器，从而保证灯驱动器的输出电流是交流电流。
将第一和第二半桥都集成进灯驱动器中可确保电流控制和倒置可在单个相位进行。从而下变频器和振荡器可在换流瞬间同步。这一点非常有利，因为其允许最优超调补偿，在换流期间通过切换设备的较低峰值电流，减小电磁干扰，在换流期间较低的切换损失等等。
灯驱动器还可包括用于检测第一半桥规定状态的装置，以及用于根据测得的规定状态进行换流，如果请求换流，从而保证与第一半桥状态同步的换流。
该实施例非常有利，因为其还可改进换流期间的同步。
一种运行灯驱动器的方法如下所述。当请求换流时，检测装置检查是否发生第一半桥的规定状态。如果是这样则进行换流。如果不是这样，灯驱动器在进行换流前等待规定状态发生。
该“规定状态”可以是通过下变频器线圈的峰值电流已经达到其最小值或者最大值。这一点例如可通过电流传感器测量。可供选择的，检测“规定状态”可以是第一电流正在切换的检测。既然这样通过下变频器线圈的电流也可以在最大值或者最小值。或者该“规定状态”可以是当下变频器的脉动电压达到某值例如最大幅值时的瞬间。
用于进行换流的装置还可适合于在从请求换流开始过去预定时间之后进行换流，即使第一半桥的规定状态没有被检测到。
一些情形中规定状态不会出现。这例如可以是在由于下变频器不切换造成的早期上升阶段中的情形。这种情形中即使请求也不进行换流。这造成对灯点亮的阻碍或者灯的熄灭。根据上述实施例，至少过去某段时间后再进行换流，而不管规定状态是否被检测到。这样，如果请求换流将一直进行。这造成下变频器开始再次切换，从而实现平滑上升。
本发明的灯驱动器特别适合于在照明***、泛光灯和/或显示***例如投影显示***中使用。包括本发明灯驱动器的显示***可有利的用在直观式(direct view)LCD***中。然而，灯驱动器能可选择的或者附加的用在任何其它合适的装置中。
本发明的这些和其它方面将参照下文所描述实施例清楚地解释。
附图说明
图1表示用于本发明的灯驱动器的电路图。
具体实施方式
图1表示用于本发明灯驱动器的电路图。电路左侧用作下变频器1并且电路右侧用作振荡器2。
下变频器1包括第一电容器3、第二电容器4、电感线圈5、第一场效应晶体管(FET)6，和第二FET 7。下变频器1的占空因子决定输出电压，即施加到电容器3的电压。
振荡器2包括电容器8、电感线圈9、第一场效应晶体管(FET)10，和第二FET 11。当第二振荡器-FET 11导通时，施加到灯的电压是施加到电容器3的电压。当另一方面第一振荡器-FET 10导通时，灯电流改变方向，并且施加到灯的电压是电源电压减去施加到电容器3的电压。
在正常运行中下变频器1以较高频率切换，优选高于100kHz，而振荡器侧2以较低频率换流，优选低于1kHz。
电路图还包括检测装置，检测装置包含用于测量电流和能够切换下变频器1的电流传感器18。电流传感器18例如可以是霍尔传感器或者磁阻电流传感器。功能元件(function)17例如计时器或者单元控制器(uController)，规定要求的换流瞬间。
灯驱动器以下面的方法运行。当功能元件17请求换流时，电路15检查下变频器1的半桥是否切换。这种现象表示为“规定状态”。当半桥切换时，14进行换流。
电路图还包括延迟电路16。当请求换流时，触发延迟电路16。这一点具备下面的效果，当变换器1不是正在切换时，即规定状态没有出现时，在经过某延迟时段后无论如何进行换流。从而可保证换流至少在其被请求之后某时间内发生，并且由于拓扑特性还可保证下变频器1再切换。这保证灯的点亮更平稳。
尽管本发明是结合优选实施例进行的描述，但本发明并不局限于这里所列举的具体形式。相反，本发明的范围应由所附权利要求来限定。在权利要求中，包括的术语不排除其它元件或者步骤。此外，尽管不同的权利要求中可包括独立的特征，但这些特征可有利的组合，并且不同权利要求的内容不意味着特征的组合是不合理和/或有利的。另外，单数标记不排除复数。这样，标记“一个”、“第一”、“第二”不排除复数。而且，权利要求中的标号不应理解为对发明范围的限制。

Claims (9)

1.一种灯驱动器，包括至少两个独立运行的集成其中的半桥，其中：
第一个所述半桥用作下变频器(1)，从而确定灯驱动器的输出电流，并且
第二个所述半桥用作振荡器(2)，从而保证灯驱动器的输出电流是交流电流。
2.根据权利要求1的灯驱动器，还包括：
用于检测第一半桥规定状态的装置(15，18)，和
用于根据所测规定状态(13，14)并且如果请求换流则进行换流的装置，从而保证与第一半桥状态同步的换流。
3.根据权利要求2的灯驱动器，其中用于进行换流的装置(13，14)还在从请求换流开始经过预定时间后进行换流，即使第一半桥的规定状态没有被检测到。
4.一种照明***，包括根据权利要求1的灯驱动器。
5.一种显示***，包括根据权利要求1的灯驱动器。
6.根据权利要求5的显示***，所述显示***是投影显示***。
7.一种直观式LCD***，包括根据权利要求5的显示***。
8.一种泛光灯，包括根据权利要求1的灯驱动器。
9.一种用于运行根据权利要求1的灯驱动器的方法，该方法包括下面的步骤：
检测第一半桥的规定状态是否出现，以及
如果检测到规定状态出现并且如果已经请求换流，则进行换流。
CNA2005800244950A 2004-07-21 2005-07-08 在换流期间生成同步的灯驱动器 Pending CN1989790A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04103489.3 2004-07-21
EP04103489 2004-07-21

Publications (1)

Publication Number Publication Date
CN1989790A true CN1989790A (zh) 2007-06-27

Family

ID=34972648

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2005800244950A Pending CN1989790A (zh) 2004-07-21 2005-07-08 在换流期间生成同步的灯驱动器

Country Status (7)

Country Link
US (1) US20070182344A1 (zh)
EP (1) EP1772042A1 (zh)
JP (1) JP2008507815A (zh)
KR (1) KR20070044022A (zh)
CN (1) CN1989790A (zh)
TW (1) TW200621092A (zh)
WO (1) WO2006011075A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062542A1 (de) * 2007-11-13 2009-05-22 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung und verfahren zum betreiben einer hochdruckentladungslampe
WO2010052630A1 (en) * 2008-11-07 2010-05-14 Koninklijke Philips Electronics N.V. Lamp driver
KR101216084B1 (ko) 2010-06-23 2012-12-26 엘지전자 주식회사 조명장치 및 모듈식 조명장치
KR101053633B1 (ko) 2010-06-23 2011-08-03 엘지전자 주식회사 모듈식 조명장치
KR101057064B1 (ko) 2010-06-30 2011-08-16 엘지전자 주식회사 엘이디 조명장치 및 그 제조방법
KR101053634B1 (ko) 2010-07-02 2011-08-03 엘지전자 주식회사 엘이디 조명장치 및 그 제조방법
US9124622B1 (en) * 2014-11-07 2015-09-01 Area 1 Security, Inc. Detecting computer security threats in electronic documents based on structure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734624A (en) * 1985-07-25 1988-03-29 Matsushita Electric Works, Ltd. Discharge lamp driving circuit
DE4024160A1 (de) * 1989-08-11 1991-02-14 Siemens Ag Gleichstromsteller
DE19546588A1 (de) 1995-12-13 1997-06-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren und Schaltungsanordnung zum Betrieb einer Entladungslampe
US5932976A (en) * 1997-01-14 1999-08-03 Matsushita Electric Works R&D Laboratory, Inc. Discharge lamp driving
US6215252B1 (en) * 1998-12-29 2001-04-10 Philips Electronics North America Corporation Method and apparatus for lamp control
GB2354899A (en) * 1999-10-02 2001-04-04 Sharp Kk Optical device for projection display
JP2003257688A (ja) * 2001-12-28 2003-09-12 Toshiba Lighting & Technology Corp 放電ランプ点灯装置及び照明器具
DE10200004A1 (de) 2002-01-02 2003-07-17 Philips Intellectual Property Elektronische Schaltung und Verfahren zum Betreiben einer Hochdrucklampe

Also Published As

Publication number Publication date
WO2006011075A1 (en) 2006-02-02
KR20070044022A (ko) 2007-04-26
TW200621092A (en) 2006-06-16
JP2008507815A (ja) 2008-03-13
EP1772042A1 (en) 2007-04-11
US20070182344A1 (en) 2007-08-09

Similar Documents

Publication Publication Date Title
CN1989790A (zh) 在换流期间生成同步的灯驱动器
EP1571752A3 (en) Soft-switching half-bridge inverter power supply system
EP1598925A3 (en) Apparatus for controlling power factor compensation in inverter control circuit and method thereof
EP1718130A3 (en) Multi-phase input dimming ballast with flyback converter and method therefor
US20130334212A1 (en) Induction heating device
EP2113997A3 (en) Phase current detection apparatus
WO2009147563A3 (en) Led lamp driver and method
WO2007042953A3 (en) System and method for powering a load
KR960032859A (ko) 직류-직류 변환기
US20090245847A1 (en) Fixer driving device and fixer driving method
EP1521506A3 (en) Discharge lamp lighting apparatus
TW200637434A (en) Cold cathode tube lighting device and driving method and integrated circuit to be used in same
EP1322141B1 (en) Hid lamp operating circuit
JP5520168B2 (ja) 液晶パネルの駆動構造
JP2004022501A (ja) 電磁誘導加熱装置
WO2010053697A3 (en) Appliance control system with a zero crossing detecting circuit
KR102069068B1 (ko) 전력 변환 장치와 그 제어방법 및 전력 변환 장치를 포함하는 공기 조화기
JP2006238510A (ja) 電源装置
TW200638806A (en) Inverter capable of switching working frequency
KR100339266B1 (ko) 유도전동기구동용인버터의전압자동제어방법
BE1003655A3 (nl) Weergave bord voorzien van een geschakelde voeding.
JPS5814560Y2 (ja) Ｘ線自動黒化度調整装置用高圧電源回路
JP2009110824A (ja) 点灯用電源装置
CN111509993A (zh) 交流电输出电源
WO2001071900A3 (en) Method and apparatus for direct synchronous rectification in a pulse-width modulated motor controller

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20070627