IN2014MU00064A - - Google Patents

Download PDF

Info

Publication number
IN2014MU00064A
IN2014MU00064A IN64MU2014A IN2014MU00064A IN 2014MU00064 A IN2014MU00064 A IN 2014MU00064A IN 64MU2014 A IN64MU2014 A IN 64MU2014A IN 2014MU00064 A IN2014MU00064 A IN 2014MU00064A
Authority
IN
India
Prior art keywords
light
emitting
emitting unit
units
unit strings
Prior art date
Application number
Inventor
Bao-Kim Liu
Ting-Lung Hsiao
Original Assignee
Delta Electronics Inc
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 Delta Electronics Inc filed Critical Delta Electronics Inc
Publication of IN2014MU00064A publication Critical patent/IN2014MU00064A/en

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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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

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

Abstract

A light-emitting device control method is provided. The light-emitting device control method comprises the steps outlined below. A light-emitting module of a light-emitting device having light-emitting unit string each having light-emitting units connected in series is operated. One end of each light-emitting unit strings receives a same DC voltage. A voltage drop value across each current control units connected in series to at least one of the light-emitting unit strings is retrieved to further determine whether the light-emitting unit of each of the light-emitting unit strings malfunctions. When x light-emitting units of a specific string malfunction and x is larger than or equal to a malfunction threshold value p, the x malfunctioned light-emitting units are shorted and (x - p + 1) light-emitting units in each of the light-emitting unit strings other than the specific string are shorted. The DC voltage received by each of the light-emitting units is decreased.
IN64MU2014 2013-01-30 2014-01-08 IN2014MU00064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW102103476A TWI492663B (en) 2013-01-30 2013-01-30 Light-emitting device and control method of the same

Publications (1)

Publication Number Publication Date
IN2014MU00064A true IN2014MU00064A (en) 2015-08-21

Family

ID=49117627

Family Applications (1)

Application Number Title Priority Date Filing Date
IN64MU2014 IN2014MU00064A (en) 2013-01-30 2014-01-08

Country Status (5)

Country Link
US (1) US8922123B2 (en)
EP (1) EP2763503B1 (en)
JP (1) JP5742909B2 (en)
IN (1) IN2014MU00064A (en)
TW (1) TWI492663B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105825806B (en) * 2016-05-24 2018-08-07 北京集创北方科技股份有限公司 LED display driving systems, control method and LED display
IT201900006028A1 (en) * 2019-04-18 2020-10-18 Tecnologie Mecc S R L System for determining the number of faulty LEDs in at least one LED string and its method.
CN112333881B (en) * 2020-10-15 2022-05-03 佛山市利升光电有限公司 Multi-LED luminous source control system
WO2024028106A1 (en) 2022-08-02 2024-02-08 Signify Holding B.V. Led lighting circuit and led luminaire comprising the same

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6288497B1 (en) 2000-03-24 2001-09-11 Philips Electronics North America Corporation Matrix structure based LED array for illumination
US20020043943A1 (en) 2000-10-10 2002-04-18 Menzer Randy L. LED array primary display light sources employing dynamically switchable bypass circuitry
JP5099661B2 (en) 2005-10-28 2012-12-19 株式会社寺田電機製作所 LED driving circuit and LED driving method
JP4963471B2 (en) * 2006-01-13 2012-06-27 シャープ株式会社 Illumination device and liquid crystal display device
US20080007885A1 (en) * 2006-07-05 2008-01-10 Texas Instruments Incorporated System for improving LED illumination reliability in projection display systems
TW200901429A (en) * 2007-06-29 2009-01-01 Chi Mei Optoelectronics Corp By-pass circuit, and electronic apparatus and display panel applying the same
JP2009038247A (en) 2007-08-02 2009-02-19 Mitsubishi Electric Corp Arrangement for lighting led devices
TWI383346B (en) * 2007-09-28 2013-01-21 Chunghwa Picture Tubes Ltd A light source driving circuit and controlling method thereof
BRPI0908980A2 (en) * 2008-03-07 2015-08-04 Sharp Kk Lighting device and display device having the same
WO2009138907A2 (en) * 2008-05-13 2009-11-19 Nxp B.V. Detection of failures within lighting devices
KR101781399B1 (en) 2008-11-17 2017-09-25 익스프레스 이미징 시스템즈, 엘엘씨 Electronic control to regulate power for solid-state lighting and methods thereof
TW201206251A (en) 2010-07-23 2012-02-01 Keeper Technology Co Ltd Control circuit for light-emitting diode
CN102444808A (en) * 2010-10-13 2012-05-09 罗业富 Lamp point protection type high-power high-brightness LED light source module
JP2012182010A (en) 2011-03-01 2012-09-20 Fujitsu Ten Ltd Illuminating device and display device

Also Published As

Publication number Publication date
EP2763503A3 (en) 2017-06-07
US20140210349A1 (en) 2014-07-31
JP2014150238A (en) 2014-08-21
TWI492663B (en) 2015-07-11
JP5742909B2 (en) 2015-07-01
EP2763503B1 (en) 2018-12-12
EP2763503A2 (en) 2014-08-06
TW201431431A (en) 2014-08-01
US8922123B2 (en) 2014-12-30

Similar Documents

Publication Publication Date Title
WO2016033420A9 (en) Apparatus and method for led running light control and status
WO2014055847A3 (en) Solid state lighting device and driver configured for failure detection and recovery
IN2014MU00064A (en)
IN2014MU00775A (en)
WO2015062938A3 (en) Light unit for emitting light and method for driving a light unit
JP2013546174A5 (en)
EP3524661A4 (en) Organic light-emitting device having long life, low voltage and high efficiency
EA201690457A1 (en) SCHEME OF EXCITATION OF LIGHT EMITTING DIODES AC
UA113993C2 (en) METHOD OF CONTROL OF ELECTRICAL GENERATOR
MY184969A (en) Efficient control assembly and control method
MX2017010473A (en) Detecting outages in a led lamp assembly.
MX2016000167A (en) Wellbore component life monitoring system.
BR112017021811A2 (en) ? method and system for performing conditioning-based maintenance of an operating tool, and computer readable storage medium?
GB201122286D0 (en) Switching control system signalling techniques
RU2015122874A (en) DEVICE FOR MANAGING THE LIGHT SOURCE AND METHOD FOR MANAGING THE LIGHT SOURCE
WO2014024082A3 (en) Led circuit
GB201204742D0 (en) A downhole disconnect device and method of operation
RO201200043U3 (en) Device with light-emitting diodes
WO2013130110A8 (en) Method for providing low voltage dc power from ac mains power
WO2014116364A3 (en) Systems and methods for providing power and data to lighting devices
WO2012109044A3 (en) Current sensing transistor ladder driver for light emitting diodes
WO2014117193A3 (en) Device for operating leds
WO2016030382A3 (en) Method for operating an optoelectronic assembly and optoelectronic assembly
TW201613417A (en) LED controller and method thereof
MX2017008992A (en) Emergency system with brown-out detection.