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GB2440186B - Protection circuit and method - Google Patents

Protection circuit and method

Info

Publication number
GB2440186B
GB2440186B GB0625573A GB0625573A GB2440186B GB 2440186 B GB2440186 B GB 2440186B GB 0625573 A GB0625573 A GB 0625573A GB 0625573 A GB0625573 A GB 0625573A GB 2440186 B GB2440186 B GB 2440186B
Authority
GB
United Kingdom
Prior art keywords
protection circuit
protection
circuit
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.)
Active
Application number
GB0625573A
Other versions
GB0625573D0 (en
GB2440186A (en
Inventor
Colin Findlay Steele
Catherine Ann Hearne
David Paul Singleton
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.)
Cirrus Logic International UK Ltd
Original Assignee
Wolfson Microelectronics PLC
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 Wolfson Microelectronics PLC filed Critical Wolfson Microelectronics PLC
Publication of GB0625573D0 publication Critical patent/GB0625573D0/en
Priority to TW096124767A priority Critical patent/TWI386104B/en
Priority to US11/822,831 priority patent/US7884557B2/en
Priority to PCT/GB2007/002623 priority patent/WO2008007106A1/en
Publication of GB2440186A publication Critical patent/GB2440186A/en
Application granted granted Critical
Publication of GB2440186B publication Critical patent/GB2440186B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/48—Picture signal generators
    • H04N1/482—Picture signal generators using the same detector device sequentially for different colour components
    • H04N1/484—Picture signal generators using the same detector device sequentially for different colour components with sequential colour illumination of the original
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/025—Current limitation using field effect transistors
    • H05B33/0833—
    • H05B33/0845—
    • H05B33/0875—
    • H05B33/089—
    • H05B37/02—
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • H05B45/397—Current mirror circuits
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Facsimile Scanning Arrangements (AREA)
GB0625573A 2006-07-14 2006-12-21 Protection circuit and method Active GB2440186B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
TW096124767A TWI386104B (en) 2006-07-14 2007-07-06 Protection circuit and method
US11/822,831 US7884557B2 (en) 2006-07-14 2007-07-10 Protection circuit and method
PCT/GB2007/002623 WO2008007106A1 (en) 2006-07-14 2007-07-13 Protection circuit and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0614096.6A GB0614096D0 (en) 2006-07-14 2006-07-14 Led driver

Publications (3)

Publication Number Publication Date
GB0625573D0 GB0625573D0 (en) 2007-01-31
GB2440186A GB2440186A (en) 2008-01-23
GB2440186B true GB2440186B (en) 2011-05-18

Family

ID=36955726

Family Applications (4)

Application Number Title Priority Date Filing Date
GBGB0614096.6A Ceased GB0614096D0 (en) 2006-07-14 2006-07-14 Led driver
GB0804150A Expired - Fee Related GB2452791B (en) 2006-07-14 2006-12-21 Light source array and method
GB0625574A Active GB2436404B (en) 2006-07-14 2006-12-21 Driver apparatus and method
GB0625573A Active GB2440186B (en) 2006-07-14 2006-12-21 Protection circuit and method

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GBGB0614096.6A Ceased GB0614096D0 (en) 2006-07-14 2006-07-14 Led driver
GB0804150A Expired - Fee Related GB2452791B (en) 2006-07-14 2006-12-21 Light source array and method
GB0625574A Active GB2436404B (en) 2006-07-14 2006-12-21 Driver apparatus and method

Country Status (2)

Country Link
GB (4) GB0614096D0 (en)
TW (2) TWI400936B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI397034B (en) * 2008-10-29 2013-05-21 Richtek Technology Corp Current regulator for improving the efficiency of led display system and method thereof
US8427075B2 (en) * 2008-12-12 2013-04-23 Microchip Technology Incorporated Constant current output sink or source
WO2010126491A1 (en) * 2009-04-28 2010-11-04 Semiconductor Components Industries, Llc Method for providing over current protection and circuit
TWI387186B (en) * 2009-11-04 2013-02-21 Richtek Technology Corp Reference signal generator and method for providing a reference signal with adaptive temperature cofficient
TWI589179B (en) * 2010-12-24 2017-06-21 晶元光電股份有限公司 Illuminating device
TWI453724B (en) * 2011-08-22 2014-09-21 Chunghwa Picture Tubes Ltd Liquid crystal display which can compensate gate voltages and method thereof
US20140118413A1 (en) 2012-10-30 2014-05-01 Samsung Display Co., Ltd. Dc-dc converter and organic light emitting display device using the same
KR20140055068A (en) * 2012-10-30 2014-05-09 삼성디스플레이 주식회사 Dc-dc converter and organic light emitting display device using the same
AT516175B1 (en) * 2014-10-13 2016-03-15 Fachhochschule Technikum Wien Device for radiating data via a lighting system
TWI724487B (en) * 2019-08-05 2021-04-11 瑩耀科技股份有限公司 Current controlling device
TWI720610B (en) * 2019-09-10 2021-03-01 新唐科技股份有限公司 Bandgap reference voltage generating circuit
CN112542954B (en) * 2020-12-16 2022-06-24 南京微盟电子有限公司 Adaptive soft drive control circuit suitable for DCM

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1437874A (en) * 1974-07-31 1976-06-03 Post Office Opto-couplers
DE102004007278A1 (en) * 2003-03-27 2004-10-07 Goodrich Hella Aerospace Lighting Systems Gmbh Interior lighting system especially suitable for aircraft, is controlled by pulsed switches in parallel with light emitting diodes, operated by control circuit
DE102005008100A1 (en) * 2005-02-22 2006-08-31 Mitsubishi Denki K.K. Redundancy circuit for series connected diodes
US20060232394A1 (en) * 2005-04-13 2006-10-19 Patel Vipul M LED turn signal and error detecting method

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2991893B2 (en) * 1993-05-31 1999-12-20 富士通株式会社 Driving circuit for light emitting element and optical amplification repeater using the same
CA2159842A1 (en) * 1994-12-05 1996-06-06 Joe A. Ortiz Diode drive current source
JP3459770B2 (en) * 1998-04-10 2003-10-27 キヤノン株式会社 Image reading apparatus and method, recording medium
EP0967590A1 (en) * 1998-06-25 1999-12-29 Hewlett-Packard Company Optical display device using LEDs and its operating method
US6522558B2 (en) * 2000-06-13 2003-02-18 Linfinity Microelectronics Single mode buck/boost regulating charge pump
US6614191B2 (en) * 2001-02-02 2003-09-02 Hewlett-Packard Company System and method for illuminating light emitting diodes in a contact image sensor
US6621235B2 (en) * 2001-08-03 2003-09-16 Koninklijke Philips Electronics N.V. Integrated LED driving device with current sharing for multiple LED strings
AU2002362878A1 (en) * 2001-10-19 2003-04-28 Clare Micronix Integrated Systems, Inc. Precharge circuit and method for passive matrix oled display
US7052180B2 (en) * 2002-01-04 2006-05-30 Kelvin Shih LED junction temperature tester
US7102801B2 (en) * 2003-04-26 2006-09-05 Hewlett-Packard Development Company, L.P. Pulse-width modulated drivers for light-emitting units of scanning mechanism
US7633463B2 (en) * 2004-04-30 2009-12-15 Analog Devices, Inc. Method and IC driver for series connected R, G, B LEDs
US7202608B2 (en) * 2004-06-30 2007-04-10 Tir Systems Ltd. Switched constant current driving and control circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1437874A (en) * 1974-07-31 1976-06-03 Post Office Opto-couplers
DE102004007278A1 (en) * 2003-03-27 2004-10-07 Goodrich Hella Aerospace Lighting Systems Gmbh Interior lighting system especially suitable for aircraft, is controlled by pulsed switches in parallel with light emitting diodes, operated by control circuit
DE102005008100A1 (en) * 2005-02-22 2006-08-31 Mitsubishi Denki K.K. Redundancy circuit for series connected diodes
US20060232394A1 (en) * 2005-04-13 2006-10-19 Patel Vipul M LED turn signal and error detecting method

Also Published As

Publication number Publication date
GB2436404B (en) 2009-02-25
TWI386104B (en) 2013-02-11
GB2436404A (en) 2007-09-26
GB0625574D0 (en) 2007-01-31
GB2452791B (en) 2009-09-16
TW200806007A (en) 2008-01-16
GB0625573D0 (en) 2007-01-31
GB0804150D0 (en) 2008-04-09
GB2452791A (en) 2009-03-18
GB2440186A (en) 2008-01-23
TWI400936B (en) 2013-07-01
GB0614096D0 (en) 2006-08-23
GB2436404A8 (en) 2007-10-02
TW200824492A (en) 2008-06-01

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20150820 AND 20150826