WO2012139293A1 - Dispositif électroluminescent à del - Google Patents

Dispositif électroluminescent à del Download PDF

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Publication number
WO2012139293A1
WO2012139293A1 PCT/CN2011/072781 CN2011072781W WO2012139293A1 WO 2012139293 A1 WO2012139293 A1 WO 2012139293A1 CN 2011072781 W CN2011072781 W CN 2011072781W WO 2012139293 A1 WO2012139293 A1 WO 2012139293A1
Authority
WO
WIPO (PCT)
Prior art keywords
constant current
led
led lighting
control chip
emitting diode
Prior art date
Application number
PCT/CN2011/072781
Other languages
English (en)
Chinese (zh)
Inventor
文茂强
Original Assignee
深圳市长运通光电技术有限公司
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 深圳市长运通光电技术有限公司 filed Critical 深圳市长运通光电技术有限公司
Priority to PCT/CN2011/072781 priority Critical patent/WO2012139293A1/fr
Publication of WO2012139293A1 publication Critical patent/WO2012139293A1/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]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • 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
    • 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
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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]

Definitions

  • the invention belongs to the technical field of LEDs, and in particular to an LED lighting device.
  • LEDs are widely used in the field of lighting and display technology due to their small size, low power consumption and long service life.
  • the power supply mode of the LED generally adopts two types of constant current driving or constant voltage driving.
  • a constant current source is generally configured for each single LED, or a plurality of LEDs are connected in series, and is supplied by a constant current source, and the latter has the advantage of lowering the circuit design than the former. The complexity and cost savings of the product.
  • LED lighting devices such as LED display screens, various LED lamps, etc.
  • each LED module is composed of a plurality of LEDs, and in order to realize LED
  • the different display functions of the illuminating device often require different illuminating brightness of the plurality of LED modules. Therefore, the above-mentioned constant current driving power supply mode is not suitable for the power supply of the LED module in the LED illuminating device.
  • the LED power supply device provided by the prior art currently adopts a power supply mode for separately supplying power to each LED module. Referring to the above-mentioned LED power supply mode, the circuit design of the power supply mode currently used by the LED light-emitting device is complicated, and the cost is high. .
  • An object of the present invention is to provide an LED lighting device, which aims to solve the problem that the power supply mode of the LED lighting device provided by the prior art is to separately supply power to each LED module, and the circuit design is complicated and the cost is high.
  • an LED lighting device the device comprising:
  • the LED lighting unit having an LED lighting module
  • a constant current source power supply unit connected to one of the plurality of LED lighting units
  • the constant current source power supply unit is configured to supply a constant current to the LED lighting unit connected to the constant current source power supply unit, and the other LED lighting units acquire the constant current from the upper stage, and provide the constant current to the lower
  • the LED lighting unit converts the constant current received by the LED lighting unit into a constant current required for each LED of the corresponding LED lighting module to drive the corresponding LED lighting module to emit light.
  • a plurality of LED lighting units with LED lighting modules are connected in cascade, and are powered by a constant current source connected to one of the LED lighting units, thereby realizing power supply of a plurality of LED lighting units.
  • the step-by-step transmission has the advantages of simple circuit design and low cost compared with the prior art power supply mode of the LED lighting device with multiple LED lighting modules.
  • FIG. 1 is a schematic structural diagram of an LED lighting device according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram of an LED lighting device according to an embodiment of the present invention.
  • FIG. 3 is an internal circuit diagram of the third LED constant current driving control chip of FIG. 2.
  • a plurality of LED lighting units with LED lighting modules are connected in cascade, and are powered by a constant current source connected to one of the LED lighting units.
  • FIG. 1 shows the structural principle of an LED lighting device provided by an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • the LED lighting device comprises: a plurality of LED lighting units with LED lighting modules connected in cascade, and a constant current source power supply unit 2 connected to one of the plurality of LED lighting units.
  • the constant current source power supply unit 2 is configured to supply a constant current to the LED lighting unit connected to the constant current source power supply unit 2, and the other LED lighting units obtain the constant current from the upper stage, and provide the constant current to the next stage.
  • Each LED lighting unit converts the constant current it receives into a constant current required for each LED of the corresponding LED lighting module to drive the corresponding LED lighting module to emit light.
  • the LED light-emitting device provided by the embodiment of the invention realizes the voltage-order transmission of the power supply of the plurality of LED light-emitting units, and has the circuit design simple and cost compared with the power supply mode of the LED light-emitting device with multiple LED light-emitting modules in the prior art. Low advantage.
  • the LED lighting device provided by the embodiment of the present invention may further include: a dimming control unit 1 connected to one of the plurality of LED lighting units for controlling the brightness of the LED lighting module in each of the LED lighting units.
  • FIG. 1 is an example in which the dimming control unit 1 and the constant current source power supply unit 2 are both connected to the LED lighting unit 3.
  • the dimming control unit 1 is configured to transmit the dimming signal sent by the dimming signal to the LED lighting unit connected to the dimming control unit 1.
  • the other LED lighting unit acquires the dimming signal from the upper stage and transmits the dimming signal to the next level.
  • Each LED lighting unit adjusts the luminous intensity of each LED in the corresponding LED lighting module according to the dimming signal received by the LED lighting unit to drive the corresponding LED lighting module to emit light of a corresponding intensity with the dimming signal.
  • the dimming signal includes at least one set of address bits, and data bits corresponding to the corresponding address bits
  • each of the LED lighting units internally stores address identification information
  • the plurality of LED lighting units respectively store the plurality of addresses.
  • the identification information is different from each other.
  • the LED lighting unit performs automatic addressing according to the dimming signal received by the LED, and compares the address bit in the dimming signal with the stored address identification information to determine an address bit corresponding to the address identification information, thereby obtaining and determining the address.
  • the bit corresponding to the data bit, and according to the data bit adjust the luminous intensity of each LED in the corresponding LED lighting module.
  • the LED lighting device includes three LED lighting units having the same structure.
  • the structure of each LED lighting unit and the cascade connection relationship between them can be referred to this example.
  • the plurality of LED lighting units specifically includes a first LED lighting unit 21, a second LED lighting unit 22, and a third LED lighting unit 23.
  • the first LED lighting unit 21 includes a first LED constant current driving control chip U1, and an LED lighting module composed of the LED D1, the LED D2, and the LED D3.
  • the anode of the light-emitting diode D1, the anode of the light-emitting diode D2, and the anode of the light-emitting diode D3 are connected to the positive terminal of the DC output unit, the cathode of the LED D1, the cathode of the LED D2, and the cathode of the LED D3 are respectively respectively respectively respectively.
  • the three constant current output driving terminals R, G, and B of the LED constant current driving control chip U1 are connected one by one, and the power supply pin VCC of the first LED constant current driving control chip U1 is connected to the positive terminal of the direct current output unit, the first LED
  • the control signal input pin IN of the constant current drive control chip U1 is connected to the dimming control unit 1.
  • the second LED lighting unit 22 includes a second LED constant current driving control chip U2, and an LED lighting module composed of the LED D4, the LED D5 and the LED D6.
  • the anode of the light-emitting diode D4, the anode of the light-emitting diode D5, and the anode of the light-emitting diode D6 are all connected to the ground pin GND of the first LED constant current drive control chip U1, the cathode of the light-emitting diode D1, the cathode of the light-emitting diode D2, and the light-emitting diode
  • the cathode of D3 is respectively connected to the three constant current output driving ends R, G, and B of the second LED constant current driving control chip U2, and the power supply pin VCC of the second LED constant current driving control chip U2 is connected to the first LED.
  • the constant current drive controls the ground pin GND of the chip U1, and the control signal input pin IN of the second LED constant current drive control chip U2 is connected
  • the third LED lighting unit 23 includes a third LED constant current driving control chip U3, and an LED lighting module composed of the LED D7, the LED D8 and the LED D9.
  • the anode of the light-emitting diode D7, the anode of the light-emitting diode D8, and the anode of the light-emitting diode D9 are connected to the ground pin GND of the second LED constant current drive control chip U2, the cathode of the light-emitting diode D7, the cathode of the light-emitting diode D8, and the light-emitting diode
  • the cathodes of the D9 are respectively connected to the three constant current output driving terminals R, G, and B of the third LED constant current driving control chip U3, and the power supply pins VCC of the third LED constant current driving control chip U3 are connected to the second LED.
  • Constant current drive control chip U2 ground pin GND third LED constant current drive control chip U3 control signal input pin IN is connected to the second LED constant current drive control chip U2 control signal output pin OUT, the third LED constant
  • the ground pin GND of the flow drive control chip U3 is connected to the output end of the constant current source power supply unit 2, and the input end of the constant current source power supply unit 2 is connected to the negative terminal of the direct current output unit.
  • the DC output unit can take AC power from the outside through the interface, and rectify and filter the AC power obtained, and then output DC power; it can also take power from the battery and directly output it, or output after filtering.
  • the constant current source power supply unit 2 outputs a constant current to the third LED constant current drive control chip U3, and the third LED constant current drive control chip U3 supplies a constant current to the second LED constant current drive control chip U2 through its power supply pin VCC.
  • the two LED constant current driving control chip U2 supplies a constant current to the first LED constant current driving control chip U1 through its power supply pin VCC.
  • the third LED constant current driving control chip U3 internally outputs a PWM signal having a constant driving current through three constant current output driving terminals R, G, B according to the constant current to drive the light emitting of the three light emitting diodes, the second LED
  • the constant current driving control chip U2 and the first LED constant current driving control chip U1 respectively drive the corresponding LED modules to emit light in the same manner.
  • the dimming control unit 1 sends a dimming signal to the first LED constant current driving control chip U1, and the first LED constant current driving control chip U1 transmits the tuning to the second LED constant current driving control chip U2 through its control signal output pin OUT.
  • the optical signal, the second LED constant current driving control chip U2 transmits the dimming signal to the third LED constant current driving control chip U3 through its control signal output pin OUT.
  • the first LED constant current driving control chip U1 controls the duty ratios of the PWM signals outputted by the three constant current output driving terminals R, G, and B according to the dimming signal to adjust the luminous intensity of the three LEDs, and secondly
  • the LED constant current driving control chip U2 and the third LED constant current driving control chip U3 respectively drive the corresponding LED modules to emit light in the same manner.
  • FIG. 3 shows the internal circuit of the third LED constant current driving control chip U3 of FIG. 2, the internal circuit of the second LED constant current driving control chip U2 and the third LED constant current driving control chip U3 and the first LED constant current driving The internal circuit of the control chip U1 is the same.
  • the third LED constant current driving control chip U3 includes a central logic module 231, a first constant current source A1, a second constant current source A2, a third constant current source A3, a resistor R1, and a first diode formed by a plurality of diodes connected in series.
  • the anode of the first diode group connected in series is connected to the ground pin GND of the second LED constant current driving control chip U2 as the power supply pin VCC of the third LED constant current driving control chip U3, and the first diode group is connected in series.
  • the cathode is connected to the output terminal of the constant current source power supply unit 2 as the ground pin GND of the third LED constant current drive control chip U3; the anode of the second diode group connected in series is used as the third LED constant current drive control chip U3.
  • the control signal input pin IN is connected to the control signal output pin OUT of the second LED constant current drive control chip U2, the cathode of the second diode group is connected to one end of the resistor R1, and the other end of the resistor R1 is used as the third LED constant.
  • the cathode, the three constant current output pins of the central logic module 231 are respectively connected to the input end of the first constant current source A1, the input end of the second constant current source A2 and the input end of the third constant current source A3, the first constant The output of the stream source A1 as the first
  • the constant current output driving end of the LED constant current driving control chip U3 is connected to the cathode of the light emitting diode D7, and the output end of the second constant current source A2 is used as the constant current output driving end of the third LED constant current driving control chip U3 to connect the light emitting diode
  • the cathode of D8 the output end of the third constant current source A3 is connected to the cathode of the light-emitting diode D9 as the constant current output driving end B of the third LED constant current driving control chip U3.
  • a plurality of LED lighting units with LED lighting modules are connected in cascade, and are powered by a constant current source connected to one of the LED lighting units, thereby realizing power supply of a plurality of LED lighting units.
  • the step-by-step transmission has the advantages of simple circuit design and low cost compared with the prior art power supply mode of the LED lighting device with multiple LED lighting modules.
  • the device further includes a dimming control unit connected to one of the LED lighting units to implement adjustment of the light intensity of each LED lighting module, and expands the application field.

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

Abstract

L'invention concerne un dispositif électroluminescent à DEL comprenant : une pluralité d'unités électroluminescentes à DEL (3) montées en cascade, qui comprennent des modules électroluminescents à DEL ; et une unité d'alimentation électrique à source de courant constant (2) qui est connectée à l'une de la pluralité d'unités électroluminescentes à DEL (3) ; l'unité d'alimentation électrique à source de courant constant (2) est utilisée pour fournir un courant constant à l'unité électroluminescente à DEL (3) à laquelle elle est connectée, tandis que les autres unités électroluminescentes à DEL (3) obtiennent le courant constant de leurs étages précédents respectifs et fournissent le courant constant aux étages suivants respectifs ; les unités électroluminescentes à DEL (3) transforment le courant constant reçu en un courant constant nécessaire pour que chaque DEL émette de la lumière dans leurs modules électroluminescents à DEL correspondants et commandent ainsi la production lumineuse des modules électroluminescents à DEL. La présente invention réalise une alimentation électrique en cascade sur une pluralité d'unités électroluminescentes à DEL (3) et présente les avantages d'une conception simple du circuit et d'une réduction du coût, par rapport aux moyens d'alimentation électrique dans l'état de la technique antérieur qui utilisent un dispositif électroluminescent à DEL comprenant une pluralité de modules électroluminescents à DEL.
PCT/CN2011/072781 2011-04-14 2011-04-14 Dispositif électroluminescent à del WO2012139293A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/072781 WO2012139293A1 (fr) 2011-04-14 2011-04-14 Dispositif électroluminescent à del

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/072781 WO2012139293A1 (fr) 2011-04-14 2011-04-14 Dispositif électroluminescent à del

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Publication Number Publication Date
WO2012139293A1 true WO2012139293A1 (fr) 2012-10-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107620908A (zh) * 2017-08-28 2018-01-23 欧普照明股份有限公司 高压恒流芯片和恒流电源
CN108488642A (zh) * 2018-05-25 2018-09-04 深圳市明微电子股份有限公司 一种发光二极管照明装置和发光二极管单元
CN111225474A (zh) * 2020-01-13 2020-06-02 深圳市明微电子股份有限公司 提高功率因数的光源驱动电路、照明系统及光源驱动方法
CN114863867A (zh) * 2022-03-27 2022-08-05 深圳市美矽微半导体有限公司 一种硬屏及其显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005167406A (ja) * 2003-11-28 2005-06-23 Mikami:Kk テレビカメラ用ｌｅｄ照明装置
WO2010055456A1 (fr) * 2008-11-13 2010-05-20 Koninklijke Philips Electronics N.V. Système d'éclairage à pluralité de del
CN101783116A (zh) * 2010-03-01 2010-07-21 友达光电股份有限公司 一种用于液晶显示器背光模块中的led驱动装置
CN102141202A (zh) * 2010-01-29 2011-08-03 深圳市长运通集成电路设计有限公司 一种led发光装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005167406A (ja) * 2003-11-28 2005-06-23 Mikami:Kk テレビカメラ用ｌｅｄ照明装置
WO2010055456A1 (fr) * 2008-11-13 2010-05-20 Koninklijke Philips Electronics N.V. Système d'éclairage à pluralité de del
CN102141202A (zh) * 2010-01-29 2011-08-03 深圳市长运通集成电路设计有限公司 一种led发光装置
CN101783116A (zh) * 2010-03-01 2010-07-21 友达光电股份有限公司 一种用于液晶显示器背光模块中的led驱动装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107620908A (zh) * 2017-08-28 2018-01-23 欧普照明股份有限公司 高压恒流芯片和恒流电源
CN107620908B (zh) * 2017-08-28 2023-11-21 欧普照明股份有限公司 高压恒流芯片和恒流电源
CN108488642A (zh) * 2018-05-25 2018-09-04 深圳市明微电子股份有限公司 一种发光二极管照明装置和发光二极管单元
CN111225474A (zh) * 2020-01-13 2020-06-02 深圳市明微电子股份有限公司 提高功率因数的光源驱动电路、照明系统及光源驱动方法
CN114863867A (zh) * 2022-03-27 2022-08-05 深圳市美矽微半导体有限公司 一种硬屏及其显示装置

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