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WO2018157345A1 - Lampe à del et circuit de régulation de luminosité de del - Google Patents

Lampe à del et circuit de régulation de luminosité de del Download PDF

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Publication number
WO2018157345A1
WO2018157345A1 PCT/CN2017/075427 CN2017075427W WO2018157345A1 WO 2018157345 A1 WO2018157345 A1 WO 2018157345A1 CN 2017075427 W CN2017075427 W CN 2017075427W WO 2018157345 A1 WO2018157345 A1 WO 2018157345A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
voltage
unit
capacitor
dimming
Prior art date
Application number
PCT/CN2017/075427
Other languages
English (en)
Chinese (zh)
Inventor
周峰
杨林
杨仕军
杨海涛
Original Assignee
深圳市豪恩光电照明股份有限公司
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 深圳市豪恩光电照明股份有限公司 filed Critical 深圳市豪恩光电照明股份有限公司
Priority to CN201780000085.5A priority Critical patent/CN107006094B/zh
Priority to PCT/CN2017/075427 priority patent/WO2018157345A1/fr
Publication of WO2018157345A1 publication Critical patent/WO2018157345A1/fr

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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Definitions

  • the present invention belongs to the field of electronic technologies, and in particular, to an LED lamp and an adjustment circuit thereof.
  • LED Light Emitting Diode
  • the existing LED lamps can realize the brightness control of the LED lamps by remote control or manual, etc., they are all realized by changing the PWM signal.
  • the existing LED luminaire has a problem that the brightness adjustment mode is single.
  • Embodiments of the present invention provide an LED lamp and an adjustment circuit thereof, which aim to solve the problem that the existing LED lamp has a single brightness adjustment mode.
  • An object of the present invention is to provide an adjustment circuit for an LED lamp, which is connected between a constant voltage power source and an LED load, and the adjustment circuit includes: a dimming unit, a voltage switching unit, and a constant current unit;
  • the dimming unit outputs a second direct current to the constant current unit according to the first direct current provided by the constant voltage power source, so that the constant current unit performs constant current driving on the LED load;
  • the voltage switching unit After dimming the LED load, the voltage switching unit adjusts a voltage of the second direct current
  • the dimming unit adjusts the voltage of the second direct current according to the received dimming signal
  • the dimming unit adjusts the voltage of the second direct current according to the received dimming signal.
  • Another aspect of the present invention provides a LED lamp, including an LED load,
  • the LED luminaire also includes an adjustment circuit for the LED luminaire as described above.
  • the invention provides an LED lamp adjusting circuit connected between a constant voltage power source and an LED load, the adjusting circuit comprises: a dimming unit, a voltage switching unit and a constant current unit; the dimming unit is according to a constant voltage power supply
  • the first direct current is supplied to the constant current unit to output the second direct current to enable the constant current unit to drive the LED load in a constant current; after dimming the LED load, the voltage switching unit adjusts the voltage of the second direct current;
  • the light unit adjusts the voltage of the second direct current according to the received dimming signal; or after the voltage switching unit adjusts the voltage of the second direct current, the dimming unit applies the second direct current according to the received dimming signal.
  • the voltage is adjusted to enrich the way the LED load is adjusted.
  • FIG. 1 is a schematic structural diagram of an adjustment circuit of an LED lamp according to an embodiment of the present invention.
  • FIG. 2 is a specific circuit diagram of an adjustment circuit of an LED lamp according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an LED lamp provided by an embodiment of the present invention.
  • the embodiment of the invention provides an LED lamp and an adjustment circuit thereof, and aims to solve the problem that the existing LED lamp has a single brightness adjustment mode.
  • FIG 1 shows the structure of an adjustment circuit of an LED lamp according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • an adjustment circuit 100 for an LED lamp is connected between a constant voltage power source 110 and an LED load 120 for adjusting the brightness of the LED load 120.
  • the adjustment circuit 100 of the LED lamp includes: a dimming unit 10, a voltage switching unit 20, and a constant current unit 30.
  • the dimming unit 10 outputs the second direct current to the constant current unit 30 according to the first direct current supplied from the constant voltage power source 110.
  • the constant current unit 30 performs constant current driving on the LED load.
  • the voltage switching unit 20 adjusts the voltage of the second direct current.
  • the dimming unit 10 adjusts the voltage of the second direct current according to the received dimming signal; or after the voltage switching unit 20 adjusts the voltage of the second direct current, the dimming unit 10 according to the received dimming The signal regulates the voltage of the second direct current.
  • the voltage switching unit 20 may include multiple loads, and the voltage switching unit 20 selects loads of different resistance values, thereby reducing or increasing the voltage of the signal output end of the dimming unit 10, thereby implementing the second direct current. The choice or switching of the voltage size.
  • the adjustment signal input end 11 of the dimming unit 10 is used to input an adjustment signal, and the voltage input end of the dimming unit 10 is connected to the first output end of the constant voltage power supply 110, and the constant current is connected.
  • the voltage input end of the unit 30 is connected to the second output end of the constant voltage power supply 110.
  • the signal output end of the dimming unit 10 and the output end of the voltage switching unit 20 are connected to the signal input end of the constant current unit 30, and the constant current unit 30 A signal output is coupled to the first end of the L ED load 120, and a second signal output of the constant current unit 30 is coupled to the second end of the LED load 120.
  • the selected dimming signals may also be different according to different brightness requirements.
  • the voltage input end of the constant current unit 30 is connected to the second output end of the constant voltage power source 110, and the constant voltage power source 110 supplies the third direct current to the constant current unit 30 as the working power of the constant current unit 30.
  • the first signal output end of the constant current unit 30 is connected to the first end of the LED load 120, and the second signal output end of the constant current unit 30 is connected to the second end of the LED load 120, wherein the output current of the constant current unit 30 for sure.
  • the dimming unit 10 outputs the second direct current to the constant current unit 30 according to the first direct current
  • the voltage of the signal input terminal of the constant current unit 30 is further changed by the voltage switching unit 20, because the constant current unit 30
  • the current output to the LED load 120 is a constant value, so when the voltage at the signal input terminal of the constant current unit 30 changes ⁇ , in order to keep the current output from the constant current unit 30 to the LED load 120 unchanged, the input of the constant current unit 30 is second.
  • the power level of the direct current also changes with the voltage change of the signal input terminal of the constant current unit 30, that is, the voltage of the output end of the dimming unit is changed by switching the voltage switching unit 20 to realize the selection of the power level of the second direct current.
  • the power of the second direct current is changed by connecting different adjustment signals.
  • the magnitude of the voltage causes the magnitude of the current of the second direct current to vary with the magnitude of the voltage of the second direct current to effect dimming of the LED load 120.
  • the adjustment signal may include adjusting the voltage signal or the PWM switching frequency signal, and connecting the different regulated voltage signals or the PWM switching frequency signals, thereby changing the voltage of the second direct current, due to the second direct current
  • the power has been determined, so dimming of the LED load 120 is achieved by varying the magnitude of the voltage of the second direct current, thereby changing the magnitude of the current that changes the second direct current.
  • the dimming unit 10 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first bypass transistor Q1, and a first diode D1. And a first capacitor C1.
  • the first end of the first resistor R1 is a voltage input end of the dimming unit, and the second end of the first resistor R1 and the first end of the second resistor R2 are connected to the high potential end of the first bypass transistor Q1.
  • the first end of the second resistor R2 and the first end of the first diode D1 are connected to the controlled end of the first switch Q1, and the controlled end of the first switch Q1 is the adjustment signal of the dimming unit 10.
  • the second end of the first diode D1 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is grounded, the low potential end of the first bypass transistor and the third resistor R3
  • the first end of the third resistor R3 and the first end of the first capacitor C1 are connected to the first end of the fifth resistor R5, and the first end of the fifth resistor R5 is the signal output end of the dimming unit 10,
  • the second end of the first capacitor C1 is co-grounded with the second end of the fifth resistor R5.
  • the first direct current passes through the first resistor R1 and the second resistor R2, and then flows into the first bypass tube Q1, and then the first The low potential end of the bypass tube Q1 flows out to form a loop with the controlled end of the first bypass tube Q1.
  • the voltage value of the first direct current is changed by the tube voltage drop of the first bypass tube Q1, and then divided by the third resistor R3 and the fifth resistor R5, and then outputted by the signal output end of the dimming unit 10.
  • the voltage switching unit 20 includes: a plurality of switching resistors (Rn, Rn+1, ..., Rm) and a load selection switch SW1.
  • the load selection switch SW1 includes at least one no-load terminal DIM and a plurality of load connection terminals, and the load-selectable no-load terminal DIM is an output end of the voltage switching unit 20, and a plurality of switching resistors (Rn, Rn+1. The first end of merely Rm) is connected to the plurality of load connections of the load selection switch SW1, and the second ends of the plurality of switching resistors (Rn, R n+1 ... Rm) Ground.
  • the load selection switch SW1 since the signal output end of the dimming unit 10 and the output end of the voltage switching unit 20 are connected to the signal input end of the constant current unit 30, when the load selection switch SW1 is selected, the load selection is selected.
  • the closed no-load terminal is connected to any of a plurality of switching resistors (Rn, Rn+1...Rm) such that a plurality of switching resistors (Rn, Rn+1...Rm) Either resistor forms a parallel relationship with the fifth resistor R5 in the dimming unit 10.
  • the voltage value of the first direct current is 10V
  • the voltage drop of the first bypass tube Q1 is 0.6V
  • the constant voltage power supply 110 supplies the first direct current to the dimming unit 10
  • the voltage Verf between the low-potential terminal of the first bypass transistor Q1 and the ground is divided by the third resistor R3 and the fifth resistor R5.
  • the voltage Verf between the low potential end of the first bypass transistor Q1 and the ground is composed of the third resistor R3 and the fifth resistor R5 and the switching resistor Rn.
  • the constant current unit 30 includes: a first chip U1, a first inductor L1, a second inductor L2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a tenth resistor.
  • R10, the eleventh resistor Rl l, the twelfth resistor R12, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 The sixth capacitor C6 and the seventh capacitor C7.
  • the first end of the second diode D2 and the first end of the eighth resistor R8 are connected to the first end of the sixth resistor R6, and form a voltage input node, and the voltage input node is the voltage input of the constant current unit 30.
  • the second end of the sixth resistor R6 and the first end of the seventh resistor R7 are connected to the enable end EN of the first chip U1, the second end of the seventh resistor R7 is grounded, and the first end of the fourth capacitor C4 is connected.
  • the first end of the second diode D1 is connected to the voltage input terminal V_IN of the first chip U1, the second end of the fourth capacitor C4 is grounded, and the second end of the eighth resistor R8 is connected to the first end of the second capacitor C2.
  • the second end of the second capacitor C2 and the second end of the second diode D2 are connected to the sensing end LX of the first chip U1, the voltage input terminal V_IN of the first chip U1 and the negative current detection of the first chip U1.
  • the ninth resistor R9, the tenth resistor R10 and the eleventh resistor Rl l are connected in parallel between the terminals SEN, and the first end of the third capacitor C3 and the first end of the twelfth resistor R12 are connected to the signal of the first chip m .
  • the negative current detecting end SEN of the first chip U1 the second end of the fifth capacitor C5, and the second end of the sixth capacitor C6 are connected to the second end of the second inductor L 2 , and the first end of the seventh capacitor C7
  • the second end of the seventh capacitor C7 is connected to the fourth end of the second inductor L2
  • the first end of the seventh capacitor C7 is the first signal output end of the constant current unit 30.
  • the dimming unit 10 outputs the second direct current to the constant current unit 30 according to the first direct current, and is input to the signal input terminal TM of the first chip U1 through the second end of the twelfth resistor R12.
  • the ninth resistor R9, the tenth resistor R10, and the eleventh resistor Rl l are sequentially connected in parallel with the voltage input terminal V_IN of the first chip U1 and the negative current detecting terminal SEN of the first chip U1, the first chip is made. A voltage difference is formed between the voltage input terminal V_IN of U1 and the negative current detecting terminal SEN of the first chip U1.
  • the second inductor L2 is used to filter the signal in the constant current unit 30, The first end and the second end of the seventh capacitor C7 are further output to the LED load 120.
  • the first bypass transistor is an IGBT transistor, a triode or a MOS transistor.
  • the first bypass transistor Q1 may be an NPN transistor Q1, the base of the NPN transistor Q1 is a controlled end of the first bypass transistor Q1, and the NPN transistor Q1 is used. Collecting electricity It is extremely high that the high-potential terminal of Q1 is closed, and the emission of NPN-type transistor Q1 is extremely low at the low-potential end of the first bypass transistor Q1.
  • the first bypass transistor Q1 may be an N-type MOS transistor Q1, and the gate of the N-type MOS transistor Q1 is a controlled end of the first bypass transistor Q1, N
  • the drain of the type MOS transistor Q1 is the high potential end of the first bypass transistor Q1
  • the source of the N-type MOS transistor Q1 is the low potential terminal of the first bypass transistor Q1.
  • Another object of the present embodiment is to provide an LED lamp 200.
  • the LED lamp 200 includes an LED load 120, and further includes an adjustment circuit 100 of the LED lamp as described above.
  • the invention provides an adjustment circuit of an LED lamp connected between a constant voltage power source and an LED load, the adjustment circuit comprising: a dimming unit, a voltage switching unit and a constant current unit; the dimming unit is according to a constant voltage power supply
  • the first direct current is supplied to the constant current unit to output the second direct current to enable the constant current unit to drive the LED load in a constant current; after dimming the LED load, the voltage switching unit adjusts the voltage of the second direct current;
  • the light unit adjusts the voltage of the second direct current according to the received dimming signal; or after the voltage switching unit adjusts the voltage of the second direct current, the dimming unit applies the second direct current according to the received dimming signal.
  • the voltage is adjusted to enrich the way the LED load is adjusted.

Landscapes

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

Abstract

L'invention se rapporte au domaine technique de l'électronique et concerne une lampe à DEL et son circuit de régulation. Le circuit de régulation d'une lampe à DEL est connecté entre une alimentation électrique à tension constante et une charge de DEL. Le circuit de régulation comprend : une unité de gradation, une unité de commutation de tension et une unité à courant constant, l'unité de gradation délivrant un second courant continu à l'unité à courant constant en fonction d'un premier courant continu fourni par l'alimentation électrique à tension constante, de telle sorte que l'unité à courant constant met en œuvre une attaque à courant constant sur la charge de DEL ; et lorsque la charge de DEL est atténuée, l'unité de commutation de tension régule une tension du second courant continu, ou, l'unité de gradation régule la tension du second courant continu en fonction d'un signal de gradation reçu, ou, une fois la tension du second courant continu régulée par l'unité de commutation de tension, l'unité de gradation régule la tension du second courant continu en fonction du signal de gradation reçu, ce qui permet d'enrichir les modes de régulation de la luminosité de la charge de DEL.
PCT/CN2017/075427 2017-03-02 2017-03-02 Lampe à del et circuit de régulation de luminosité de del WO2018157345A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780000085.5A CN107006094B (zh) 2017-03-02 2017-03-02 Led灯具及led亮度调节电路
PCT/CN2017/075427 WO2018157345A1 (fr) 2017-03-02 2017-03-02 Lampe à del et circuit de régulation de luminosité de del

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/075427 WO2018157345A1 (fr) 2017-03-02 2017-03-02 Lampe à del et circuit de régulation de luminosité de del

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WO2018157345A1 true WO2018157345A1 (fr) 2018-09-07

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PCT/CN2017/075427 WO2018157345A1 (fr) 2017-03-02 2017-03-02 Lampe à del et circuit de régulation de luminosité de del

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WO (1) WO2018157345A1 (fr)

Cited By (4)

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CN109736224A (zh) * 2019-02-28 2019-05-10 河南陆达电子科技有限公司 一种主动式隧道轮廓标及隧道交通诱导系统
CN112020175A (zh) * 2019-05-13 2020-12-01 广东芯神科技有限公司 Led调光电路及设备
CN112333875A (zh) * 2020-11-30 2021-02-05 常州倍速智能科技有限公司 车载节能照明灯
CN113286399A (zh) * 2021-04-26 2021-08-20 上海利霸电子科技有限公司 一种多亮度灯光展示道具的pwm驱动电路

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CN111343764B (zh) * 2020-03-05 2024-12-24 深圳市晟碟半导体有限公司 一种led调光电路、装置及其调光方法
CN115002971A (zh) * 2022-04-22 2022-09-02 欧普照明股份有限公司 Led驱动电路及led照明装置

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CN101925224A (zh) * 2010-01-15 2010-12-22 海洋王照明科技股份有限公司 一种恒流调光电路及led灯具
CN102264175A (zh) * 2010-05-26 2011-11-30 马士科技有限公司 一种可分级调光的发光二极管灯调光装置
US9131581B1 (en) * 2014-03-14 2015-09-08 Lightel Technologies, Inc. Solid-state lighting control with dimmability and color temperature tunability

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CN101707836B (zh) * 2009-11-12 2013-05-01 英飞特电子（杭州）股份有限公司 一种通过电源开关调光的电路
CN102413615B (zh) * 2011-11-30 2014-08-06 林万炯 一种适合dc-dc控制的两线输入调光电路
CN103841714B (zh) * 2012-11-27 2016-01-13 深圳市海洋王照明工程有限公司 Led调光驱动电路
CN206759769U (zh) * 2017-03-02 2017-12-15 深圳市豪恩光电照明股份有限公司 Led灯具及led亮度调节电路

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CN101925224A (zh) * 2010-01-15 2010-12-22 海洋王照明科技股份有限公司 一种恒流调光电路及led灯具
CN102264175A (zh) * 2010-05-26 2011-11-30 马士科技有限公司 一种可分级调光的发光二极管灯调光装置
US9131581B1 (en) * 2014-03-14 2015-09-08 Lightel Technologies, Inc. Solid-state lighting control with dimmability and color temperature tunability

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736224A (zh) * 2019-02-28 2019-05-10 河南陆达电子科技有限公司 一种主动式隧道轮廓标及隧道交通诱导系统
CN112020175A (zh) * 2019-05-13 2020-12-01 广东芯神科技有限公司 Led调光电路及设备
CN112333875A (zh) * 2020-11-30 2021-02-05 常州倍速智能科技有限公司 车载节能照明灯
CN113286399A (zh) * 2021-04-26 2021-08-20 上海利霸电子科技有限公司 一种多亮度灯光展示道具的pwm驱动电路

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