FR3116986B1 - Procédé de pilotage en tension pour une source lumineuse pixélisée - Google Patents

Procédé de pilotage en tension pour une source lumineuse pixélisée Download PDF

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Publication number
FR3116986B1
FR3116986B1 FR2012562A FR2012562A FR3116986B1 FR 3116986 B1 FR3116986 B1 FR 3116986B1 FR 2012562 A FR2012562 A FR 2012562A FR 2012562 A FR2012562 A FR 2012562A FR 3116986 B1 FR3116986 B1 FR 3116986B1
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FR
France
Prior art keywords
light source
pixelated light
control method
voltage control
thermal runaway
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
FR2012562A
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English (en)
Other versions
FR3116986A1 (fr
Inventor
Rabih Taleb
Sid Ahmed Beddar
Idrissi Hafid El
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to FR2012562A priority Critical patent/FR3116986B1/fr
Priority to PCT/EP2021/084076 priority patent/WO2022117775A1/fr
Publication of FR3116986A1 publication Critical patent/FR3116986A1/fr
Application granted granted Critical
Publication of FR3116986B1 publication Critical patent/FR3116986B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • 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

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Semiconductor Lasers (AREA)

Abstract

L’invention propose un procédé de pilotage d’une source lumineuse pixélisée pour un véhicule automobile qui est pilotée en tension. Le procédé permet d’éviter des risques d’emballement thermique des pixels élémentaires de la source. En baissant la tension d’alimentation électrique lorsqu’une température seuil, correspondant de préférence à une intensité de courant seuil maximale, est dépassée, le procédé de pilotage permet la protection des jonctions semi-conductrices des pixels de la source lumineuse pixélisée, pour en augmenter la durée de vie et pour éviter des défauts visibles au niveau d’un faisceau projeté sur la route suite à un emballement thermique. Figure pour l’abrégé : Fig. 1
FR2012562A 2020-12-02 2020-12-02 Procédé de pilotage en tension pour une source lumineuse pixélisée Active FR3116986B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2012562A FR3116986B1 (fr) 2020-12-02 2020-12-02 Procédé de pilotage en tension pour une source lumineuse pixélisée
PCT/EP2021/084076 WO2022117775A1 (fr) 2020-12-02 2021-12-02 Procédé de pilotage en tension pour une source lumineuse pixélisée

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2012562A FR3116986B1 (fr) 2020-12-02 2020-12-02 Procédé de pilotage en tension pour une source lumineuse pixélisée
FR2012562 2020-12-02

Publications (2)

Publication Number Publication Date
FR3116986A1 FR3116986A1 (fr) 2022-06-03
FR3116986B1 true FR3116986B1 (fr) 2024-04-12

Family

ID=74347339

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2012562A Active FR3116986B1 (fr) 2020-12-02 2020-12-02 Procédé de pilotage en tension pour une source lumineuse pixélisée

Country Status (2)

Country Link
FR (1) FR3116986B1 (fr)
WO (1) WO2022117775A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010044300A1 (fr) * 2008-10-14 2010-04-22 シャープ株式会社 Dispositif d'affichage à cristaux liquides
DE102017105131A1 (de) * 2017-03-10 2018-09-13 Osram Opto Semiconductors Gmbh Verfahren zum Betreiben eines optoelektronischen Bauelements und optoelektronisches Bauelement
FR3085099B1 (fr) * 2018-06-22 2023-06-30 Valeo Vision Dispositif de pilotage de l'alimentation electrique de sources lumineuses d'un vehicule automobile en fonction des variations de leurs temperatures

Also Published As

Publication number Publication date
FR3116986A1 (fr) 2022-06-03
WO2022117775A1 (fr) 2022-06-09

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