WO2013115448A1 - Système de contrôle pour minimiser les différences de luminosité entre les del à commande ca - Google Patents

Système de contrôle pour minimiser les différences de luminosité entre les del à commande ca Download PDF

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Publication number
WO2013115448A1
WO2013115448A1 PCT/KR2012/007250 KR2012007250W WO2013115448A1 WO 2013115448 A1 WO2013115448 A1 WO 2013115448A1 KR 2012007250 W KR2012007250 W KR 2012007250W WO 2013115448 A1 WO2013115448 A1 WO 2013115448A1
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WO
WIPO (PCT)
Prior art keywords
led
current
group
leds
voltage
Prior art date
Application number
PCT/KR2012/007250
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English (en)
Korean (ko)
Inventor
고관수
Original Assignee
에스엔제이 주식회사
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Application filed by 에스엔제이 주식회사 filed Critical 에스엔제이 주식회사
Publication of WO2013115448A1 publication Critical patent/WO2013115448A1/fr

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    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/24—Circuit arrangements for protecting against overvoltage
    • 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]
    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present invention relates to a control system for minimizing the variation in the luminous flux (brightness) between the LED or LED group of the AC direct drive method, which is one of the LED lamp driving method used as a real and internal light source. After rectified by, the series LEDs are sequentially controlled in order to reduce the current deviation between the first LED group and the terminal LED group, which is the biggest problem of the driving method to increase the current, so that the uniform luminous flux (brightness) can be realized for the entire section.
  • the present invention relates to a control system for minimizing brightness deviation between AC drive LEDs, which is improved to maximize control efficiency and LED use efficiency by dual control.
  • the LED is a light emitting diode that is injected by a small number of carriers (electrons or holes) by using the pn junction structure of the semiconductor and is re-combined, also known as a light emitting diode, and because of the high efficiency of converting electrical energy into light energy up to 90 Energy savings of up to% are gaining attention as next-generation light sources.
  • LEDs are usually driven by SMPS, which converts AC 100V or AC 220V power sources to DC 12 to 48V.
  • LEDs must be driven by using a SMPS and a constant current driver, which is a DC voltage converter, and thus have a high manufacturing cost.
  • a SMPS and a constant current driver which is a DC voltage converter, and thus have a high manufacturing cost.
  • an electrolytic capacitor having a limited lifespan is required as an essential component of the SMPS. come.
  • FIG. 1 is a driving circuit diagram of a conventional AC drive LED module according to the related art.
  • a conventional AC direct drive LED control technique includes LED taps for each group for high power factor, high efficiency, and active input power compensation. And a sequential switching circuit, wherein the voltage and current waveforms on the circuit are as shown in FIG. 2.
  • each group LED is sequentially turned ON / OFF according to the potential of the AC input voltage (AC voltage changes with time, phase) is the same as the example of FIG.
  • LED group 1 is all ON in the 1-9 section
  • LED group 2 ⁇ LED group 3 ⁇ LED group 4 is turned on as the interval becomes smaller
  • LED group 5 It can be seen that it is ON only in 5 sections, and according to the series LED sequential control method, the current deviation between the first LED group and the terminal LED group is about 50% or more, and it is not possible to realize uniform brightness across the bulbs.
  • the present invention was created in view of the above-described problems in the prior art, and an object of the present invention is to reduce the current deviation between the first LED group and the end LED group, which is a problem of the conventional AC drive LED control, for the entire section.
  • an object of the present invention is to reduce the current deviation between the first LED group and the end LED group, which is a problem of the conventional AC drive LED control, for the entire section.
  • the purpose of the present invention is to provide a control system for minimizing brightness deviation between AC driving LEDs, which can realize low cost and high efficiency through the dual control method of the LED group controller.
  • the present invention is a means for achieving the above object, a full-wave rectifier is applied AC voltage via a bridge full-wave rectification circuit; A slab connected to an area between the plurality of LEDs or LED groups to non-sequentially dual control from the upper plurality of LEDs or LED groups to the lower plurality of LEDs or LED groups among the plurality of LEDs or LED groups connected in series with the full wave rectifier.
  • An eve source controller Section instantaneous current control unit connected to the region between the plurality of upper LEDs or LED groups, lower LEDs, or LED groups connected in series, respectively, to sequentially and constantly control the plurality of upper LEDs or LED groups, lower LEDs, or LED groups Wow; It is connected in parallel with the shunt register of the upper group section instantaneous current controller to increase the magnitude of current in the secondary current control to compensate similarly to the lower group LED current to minimize the loss of the main TR (FET) of the lower group section instantaneous current controller.
  • FET main TR
  • Upper group secondary instantaneous current compensation unit An input power compensator that is connected in parallel with the shunt-register of the instantaneous current controller in the lower group section and actively controls the lower group current height and current angle to compensate for the input power caused by the input voltage variation; It provides a control system for minimizing the brightness deviation between the AC driving LED, characterized in that it comprises a; over-voltage protection unit to block the current of the upper or lower section instantaneous current control unit when the transient voltage input.
  • the slave source controller supplies a current to the upper group LED until the voltage through the full wave rectifier reaches the threshold voltage of the lower group LED through the slave source controller, and the full wave rectified voltage is further increased When the threshold voltage of the group LED is reached, the characteristics of the slave source control unit gradually decreases and then shuts off.
  • the upper group secondary instantaneous current compensation unit is composed of a MOS-FET including a resistor input voltage level detection and a series resistance, and during the secondary current control to increase the current size to compensate similarly to the lower group LED current It is also characterized by minimizing the loss of the main TR (FET) of the subgroup LEDs.
  • the input power compensator is composed of a MOS-FET including a RC input voltage level detection and a series resistor, and actively controls the current group and the current angle of the lower group to compensate for the input power for the input voltage variation. It also has its characteristics.
  • section instantaneous current control unit is applied to one per group in the upper group, one in the lower group is characterized in that only applied to the end group.
  • the brightness deviation minimizing control system between the AC driving LEDs according to the present invention can obtain the following effects.
  • the lamp in the AC-driven LED control method, it is possible to realize the lamp with the same uniform luminous flux (brightness) as much as possible by reducing the current deviation between the first LED group and the terminal LED group, so that not only the bulb type such as incandescent bulb replacement lamp but also the fluorescent lamp
  • the range of applications can be extended to straight lamps such as replacement lamps.
  • the LED luminous efficiency can be maximized through the optimal I F setting by reducing the current deviation between LED groups.
  • the switching off time is minimized by using a combination of current height and current phase control in input power compensation, thereby minimizing luminous flux degradation.
  • 1 is a driving circuit diagram of a conventional AC driving LED module
  • FIG. 2 is a waveform diagram of input voltage and current when driving an AC drive LED module according to the related art
  • each group LED is turned on / off according to a phase when driving a conventional AC driving LED module
  • Figure 4 is a block circuit diagram showing an example of the luminous flux (brightness) deviation minimization control between the AC driving LED according to the present invention
  • FIG. 5 is an input waveform voltage and current waveform diagram of a control method for minimizing light beam (brightness) deviation between AC driving LEDs according to the present invention
  • 6 to 11 are current loops for each operation according to time of FIG.
  • FIG. 4 is a block circuit diagram schematically showing a configuration of a control method for minimizing light beam (brightness) deviation between AC driving LEDs according to the present invention.
  • the full-wave rectifying unit 100 performs full-wave rectification of the commercial power supply voltage to supply the first and second series LED units 200 and 300 and the slave source control unit 400.
  • the second series LED unit 300 forms an upper LED group, and is grouped and arranged into a plurality of LEDs or LED groups according to efficiency and power factor optimization.
  • a section instantaneous current controller 600 or 700 is applied to each group. It branches to LED TAP2 and LED TAP3.
  • the first series LED unit 200 forms a lower LED group, and arranged in a group of a plurality of LEDs or LED groups according to the efficiency and power factor optimization, the section instantaneous current control unit 800 only one LED in the termination group Branch to TAP1.
  • the LED quantity ratio of the lower LED group and the upper LED group constituting the first and second series LED units 200 and 300 is about 6: 5.
  • the primary current flows from the slave rectifier 100 to the upper LED group section instantaneous current controller 600 through the LED TAP2 in the slave source controller 400.
  • the primary current starts to flow from the slave source controller 400 to the uppermost section instantaneous current controller 700 through the LED TAP3.
  • the current of the next lower section instantaneous current control unit 600 decreases by the current increase of the uppermost section instantaneous current control unit 700, and is automatically cut off when a current higher than or equal to a set value flows.
  • Group LED group below LED TAP1
  • the current through the slave source controller 400 begins to decrease and as the current decreases, the current flows through the section instantaneous current controller 800 and the current above the set value flows. It is automatically shut off.
  • the secondary current flows from the main source BD + to the uppermost section instantaneous current controller 700 through the LED TAP3.
  • the biggest feature of the present invention is to take a very unique method of driving from the upper LED group out of order and repeatedly driving the upper LED group twice in one cycle over the first and second cycles.
  • the voltage through the main source BD + reaches the threshold voltage of the LED 4 through the slave source controller 400.
  • the voltage across the main source BD + approaches the threshold voltage of LED1.
  • the primary current flows from the slave source controller 400 to the upper LED group section instantaneous current controller 600 through the LED TAP2.
  • a constant current flows through the R12 shunt-resistor and the Q6 of the section instantaneous current controller 600, and is automatically cut off when a current higher than a set value flows.
  • the voltage across the main source BD + passes through LED1 and reaches the threshold voltage of LED2.
  • the primary current flows from the slave source controller 400 to the highest LED group section instantaneous current controller 700 through the LED TAP3.
  • a constant current flows through the R13 shunt-resistor and the Q7 of the section instantaneous current controller 700, and is automatically cut off when a current higher than a set value flows.
  • the voltage across the main source BD + passes through LED1 and LED2 to reach the threshold voltage of LED3.
  • the current of Q1 starts to decrease as the current of Q2 increases, and the secondary current flows through the section instantaneous current control unit 800 as the decrease decreases.
  • the current of 400 slowly decreases and then automatically shuts off.
  • the secondary current flows through the LED Tap2 from the main source BD + to the next-order instantaneous current controller 600.
  • a constant current flows through the R12 shunt-resistor and Q6 of the section instantaneous current control unit 600, and is automatically cut off when a current higher than a set value flows.
  • the secondary current flows through the LED Tap3 from the main source BD + to the uppermost section instantaneous current controller 700.
  • a constant current flows through the R13 shunt-resistor and the Q7 of the section instantaneous current controller 700, and is automatically cut off when a current higher than a set value flows.
  • subdividing the group of the section instantaneous current controllers 600 and 700 may further improve the total harmonic distortion (THD) for efficiency, power factor, and current.
  • TDD total harmonic distortion
  • the overvoltage protection unit 500 cuts off the current of the section instantaneous current controller 600, 700, and 800 for the purpose of protecting the LEDs and the active elements Q5, Q6, and Q7 when the transient voltage is input.
  • the input power compensator 900 is connected in parallel with the shunt register R10 of the section instantaneous current controller 800 connected to the lower group LED, that is, the first series LED unit 200, to input an input voltage variation. Actively control lower LED group current height and current angle for power compensation.
  • the upper group secondary instantaneous current compensator 1000 is connected in parallel with the shunt registers R12 and R13 of the upper group section instantaneous current control unit 600 and 700 to increase the magnitude of the current during the secondary current control to lower the lower group. Compensation similar to LED current ensures minimal loss of main TR (FET) and Q5 for subgroup LEDs.
  • the control method for minimizing light beam (brightness) deviation between AC driving LEDs according to the present invention is a result of testing a sample sample as compared to the conventional AC driving method, and the current variation rate of each group is shown to be constant. same.

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

Abstract

La présente invention se rapporte à un système de contrôle permettant de minimiser les différences de luminosité entre les DEL à commande CA, et comprend : une unité de rectification à ondes complètes pour rectifier une source d'alimentation ; une unité DEL dans laquelle plusieurs DEL sont disposées en réseau ; une unité de contrôle de source esclave pour le contrôle ; une pièce de contrôle de courant instantané sectionnel pour contrôler par section non séquentielle plusieurs groupes de DEL ; une unité de prévention de surtension pour protéger les DEL et les dispositifs actifs ; une unité de compensation d'alimentation d'entrée pour contrôler activement le niveau de courant et l'angle de courant d'un groupe inférieur ; et une unité de compensation de courant instantané secondaire de groupe supérieur pour minimiser la perte de DEL de groupe inférieur pour le TR principal. La différence de courant entre un groupe de DEL et le groupe de DEL de fin peut être réduite pour fournir aux lampes ayant la lumière la plus uniforme le débit et la luminosité dans toutes les sections, et le IF optimum peut être réglé afin de maximiser l'efficacité de flux lumineux de DEL, et un double système de contrôle pour un contrôleur de groupe supérieur réduit le coût et maximise l'efficacité du contrôle.
PCT/KR2012/007250 2012-01-30 2012-09-10 Système de contrôle pour minimiser les différences de luminosité entre les del à commande ca WO2013115448A1 (fr)

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Application Number Priority Date Filing Date Title
KR1020120008743A KR101311775B1 (ko) 2012-01-30 2012-01-30 교류 구동 ｌｅｄ간 밝기 편차 최소화 제어시스템
KR10-2012-0008743 2012-01-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105898921A (zh) * 2016-05-12 2016-08-24 中节能晶和照明有限公司 一种高压线性恒流pwm光电隔离接收端

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KR102335456B1 (ko) 2017-06-15 2021-12-06 주식회사 엘엑스세미콘 발광 다이오드 조명 장치

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2009230973A (ja) * 2008-03-21 2009-10-08 Toshiba Lighting & Technology Corp 照明装置
KR100942234B1 (ko) * 2009-07-23 2010-02-12 (주)로그인디지탈 발광다이오드 조명장치
KR20100049527A (ko) * 2010-04-22 2010-05-12 주식회사 로보메이션 Ｌｅｄ 구동회로
KR20100121816A (ko) * 2009-05-11 2010-11-19 엘지전자 주식회사 Ｌｅｄ 구동회로 및 그 구동방법

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Publication number Priority date Publication date Assignee Title
TW201105172A (en) * 2009-07-30 2011-02-01 Advanced Connectek Inc Light emitting diode (LED) device and driving method thereof
KR101064906B1 (ko) * 2010-02-03 2011-09-16 (주)로그인디지탈 발광 다이오드 조명 구동 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009230973A (ja) * 2008-03-21 2009-10-08 Toshiba Lighting & Technology Corp 照明装置
KR20100121816A (ko) * 2009-05-11 2010-11-19 엘지전자 주식회사 Ｌｅｄ 구동회로 및 그 구동방법
KR100942234B1 (ko) * 2009-07-23 2010-02-12 (주)로그인디지탈 발광다이오드 조명장치
KR20100049527A (ko) * 2010-04-22 2010-05-12 주식회사 로보메이션 Ｌｅｄ 구동회로

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105898921A (zh) * 2016-05-12 2016-08-24 中节能晶和照明有限公司 一种高压线性恒流pwm光电隔离接收端

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KR20130087696A (ko) 2013-08-07

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