EP2919559A3 - Driving apparatus of light emitting load and light emitting apparatus for vehicle - Google Patents

Driving apparatus of light emitting load and light emitting apparatus for vehicle Download PDF

Info

Publication number
EP2919559A3
EP2919559A3 EP15157687.3A EP15157687A EP2919559A3 EP 2919559 A3 EP2919559 A3 EP 2919559A3 EP 15157687 A EP15157687 A EP 15157687A EP 2919559 A3 EP2919559 A3 EP 2919559A3
Authority
EP
European Patent Office
Prior art keywords
light emitting
switching element
vehicle
load
driving apparatus
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
EP15157687.3A
Other languages
German (de)
French (fr)
Other versions
EP2919559A2 (en
EP2919559B1 (en
Inventor
Junichi Kato
Yasuyuki Matsunaga
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.)
Sanken Electric Co Ltd
Original Assignee
Sanken Electric 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 Sanken Electric Co Ltd filed Critical Sanken Electric Co Ltd
Publication of EP2919559A2 publication Critical patent/EP2919559A2/en
Publication of EP2919559A3 publication Critical patent/EP2919559A3/en
Application granted granted Critical
Publication of EP2919559B1 publication Critical patent/EP2919559B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Electronic Switches (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Led Devices (AREA)

Abstract

A light emitting load driving apparatus includes a first switching element, a second switching element, and a gate driver, to drive first and second light emitting loads connected in series. The first switching element, when in an ON state, bypasses a current to be passed to the first light emitting load. The second switching element, when in an ON state, bypasses a current to be passed to the second light emitting load. The gate driver reduces at least one of an overshoot current caused when the first and second switching elements are simultaneously turned on and an undershoot current caused when the first and second switching elements are simultaneously turned off.
EP15157687.3A 2014-03-10 2015-03-05 Driving apparatus of light emitting load and light emitting apparatus for vehicle Active EP2919559B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014046174A JP6278238B2 (en) 2014-03-10 2014-03-10 Light emitting load driving device and vehicle light emitting device

Publications (3)

Publication Number Publication Date
EP2919559A2 EP2919559A2 (en) 2015-09-16
EP2919559A3 true EP2919559A3 (en) 2015-10-14
EP2919559B1 EP2919559B1 (en) 2019-01-16

Family

ID=53008254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15157687.3A Active EP2919559B1 (en) 2014-03-10 2015-03-05 Driving apparatus of light emitting load and light emitting apparatus for vehicle

Country Status (2)

Country Link
EP (1) EP2919559B1 (en)
JP (1) JP6278238B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9769898B1 (en) * 2016-12-08 2017-09-19 Nxp B.V. Adjusted pulse width modulation (PWM) curve calculations for improved accuracy

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080068192A1 (en) * 2006-09-20 2008-03-20 Tir Technology Lp Light emitting element control system and lighting system comprising same
US20110163682A1 (en) * 2010-01-04 2011-07-07 Cooledge Lighting, Inc. Method and system for driving light emitting elements
DE102013100663A1 (en) * 2013-01-23 2014-07-24 Osram Opto Semiconductors Gmbh Arrangement and method for operating an arrangement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05328795A (en) * 1992-05-26 1993-12-10 Mitsubishi Electric Corp Output buffer
JP4573579B2 (en) * 2004-06-18 2010-11-04 三洋電機株式会社 LED lighting device
WO2013161215A1 (en) * 2012-04-25 2013-10-31 株式会社小糸製作所 Light source control device
JP5422068B2 (en) 2013-02-15 2014-02-19 三菱電機株式会社 LED lighting device and vehicle headlamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080068192A1 (en) * 2006-09-20 2008-03-20 Tir Technology Lp Light emitting element control system and lighting system comprising same
US20110163682A1 (en) * 2010-01-04 2011-07-07 Cooledge Lighting, Inc. Method and system for driving light emitting elements
DE102013100663A1 (en) * 2013-01-23 2014-07-24 Osram Opto Semiconductors Gmbh Arrangement and method for operating an arrangement

Also Published As

Publication number Publication date
EP2919559A2 (en) 2015-09-16
JP6278238B2 (en) 2018-02-14
JP2015170556A (en) 2015-09-28
EP2919559B1 (en) 2019-01-16

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