DK2145508T3 - Led-udfaldsdetekteringskredsløb - Google Patents

Led-udfaldsdetekteringskredsløb Download PDF

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Publication number
DK2145508T3
DK2145508T3 DK08737957.4T DK08737957T DK2145508T3 DK 2145508 T3 DK2145508 T3 DK 2145508T3 DK 08737957 T DK08737957 T DK 08737957T DK 2145508 T3 DK2145508 T3 DK 2145508T3
Authority
DK
Denmark
Prior art keywords
voltage
led
transistor
detection circuit
signal
Prior art date
Application number
DK08737957.4T
Other languages
English (en)
Inventor
Jeroen Snelten
Original Assignee
Philips Lighting Holding Bv
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39722640&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DK2145508(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Philips Lighting Holding Bv filed Critical Philips Lighting Holding Bv
Application granted granted Critical
Publication of DK2145508T3 publication Critical patent/DK2145508T3/da

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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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection 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
    • 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

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)

Claims (7)

1. Udfaldsdetekteringskredsløb (10) til detektering afen defekt LED, hvor udfaldsdetekteringskredsløbet er tilpasset til at blive koblet over LED’en (D1), hvilket udfaldsdetekteringskredsløb omfatter: - en topspændingsdetektor (20) koblet til LED’en for detektering af en spænding over LED’en, hvor topspændingsdetektoren har en topspændingsterminal (Tout) til levering af et topspændingssignal; - en differentialforstærker (30) koblet til topspændingsterminalen til modtagelse af topspændingssignalet som et første indgangssignal, og koblet til en referencespændingsterminal, hvor referencespændingsterminalen er udformet til at levere en referencespænding (Vref) som et andet indgangssignal, hvor differentialforstærkeren omfatter en udgangsterminal (Vout) til levering af et udfaldsdetekteringssignal, kendetegnet ved, at topspændingssignalet i alt væsentligt svarer til en maksimal spænding afspændingen over LED’en, og ved, at, til detektering afen defekt LED, der er tilpasset til at blive koblet over et DC-DC-konverterkredsløb til modtagelse af et effektsignal, udfaldsdetekteringskredsløbet er tilpasset til at levere udfaldsdetekteringssignalet med én spænding, når LED’en ikke er defekt, med en anden spænding, når LED’en er defekt og kortsluttes.
2. Udfaldsdetekteringskredsløb (10) ifølge krav 1, hvor topspændingsdetektoren (20) omfatter en seriel forbindelse af en diode (D2) og en kondensator (C1), og hvor topspændingsterminalen (Tout) er tilvejebragt ved en knude mellem dioden og kondensatoren.
3. Udfaldsdetekteringskredsløb (10) ifølge krav 2, hvor en modstand (R4) er parallelforbundet med kondensatoren (C1).
4. Udfaldsdetekteringskredsløb (10) ifølge krav 2, hvor serielforbindelsen af dioden (D2) og kondensatoren (C1) omfatter en modstand (R3) forbundet mellem dioden og kondensatoren.
5. Udfaldsdetekteringskredsløb (10) ifølge krav 1, hvor differentialforstærkeren (30) omfatter et differentielt transistorpar, hvor det første indgangssignal overføres til en base af en første transistor (Q1) og det andet indgangssignal overføres til basen af en anden transistor (Q2), hvor udgangsterminalen (Vout) er koblet til en kollektor af den anden transistor.
6. Udfaldsdetekteringskredsløb (10) ifølge krav 1, hvor differentialforstærkeren (30) omfatter en operationsforstærkningsanordning (OA), hvilken operationsforstærkningsanordning er udformet til at forstærke en spændingsforskel mellem det første indgangssignal og det andet indgangssignal og til at afgive et spændingsforskelssignal.
7. Udfaldsdetekteringskredsløb ifølge krav 6, der endvidere omfatter en transistor (Q2), hvor en base af transistoren er koblet til operationsforstærkningsanordningen for modtagelse af spændingsforskelssignalet, hvilken udgangsterminal (Vout) af differentialforstærkeren (30) er koblet til en kollektor af transistoren.
DK08737957.4T 2007-04-27 2008-04-23 Led-udfaldsdetekteringskredsløb DK2145508T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07107165 2007-04-27
PCT/IB2008/051553 WO2008132661A1 (en) 2007-04-27 2008-04-23 Led outage detection circuit

Publications (1)

Publication Number Publication Date
DK2145508T3 true DK2145508T3 (da) 2018-11-12

Family

ID=39722640

Family Applications (1)

Application Number Title Priority Date Filing Date
DK08737957.4T DK2145508T3 (da) 2007-04-27 2008-04-23 Led-udfaldsdetekteringskredsløb

Country Status (11)

Country Link
US (1) US8076953B2 (da)
EP (2) EP3468303B1 (da)
JP (1) JP5341067B2 (da)
KR (1) KR101517353B1 (da)
CN (1) CN101669405B (da)
DK (1) DK2145508T3 (da)
ES (2) ES2688940T3 (da)
PL (1) PL2145508T3 (da)
TR (1) TR201815479T4 (da)
TW (1) TWI455651B (da)
WO (1) WO2008132661A1 (da)

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Also Published As

Publication number Publication date
EP3468303A1 (en) 2019-04-10
CN101669405A (zh) 2010-03-10
ES2688940T3 (es) 2018-11-07
JP2010524777A (ja) 2010-07-22
KR101517353B1 (ko) 2015-05-04
US8076953B2 (en) 2011-12-13
CN101669405B (zh) 2012-06-13
JP5341067B2 (ja) 2013-11-13
EP3468303B1 (en) 2024-03-06
TR201815479T4 (tr) 2018-11-21
KR20100017403A (ko) 2010-02-16
TWI455651B (zh) 2014-10-01
ES2978762T3 (es) 2024-09-19
WO2008132661A1 (en) 2008-11-06
PL2145508T3 (pl) 2019-01-31
EP2145508A1 (en) 2010-01-20
EP2145508B1 (en) 2018-08-15
US20100117656A1 (en) 2010-05-13
EP3468303C0 (en) 2024-03-06
TW200913786A (en) 2009-03-16

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