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WO2009110750A2 - Dispositif d'éclairage à del - Google Patents

Dispositif d'éclairage à del Download PDF

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Publication number
WO2009110750A2
WO2009110750A2 PCT/KR2009/001080 KR2009001080W WO2009110750A2 WO 2009110750 A2 WO2009110750 A2 WO 2009110750A2 KR 2009001080 W KR2009001080 W KR 2009001080W WO 2009110750 A2 WO2009110750 A2 WO 2009110750A2
Authority
WO
WIPO (PCT)
Prior art keywords
led
duty ratio
leds
control
lighting device
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.)
Ceased
Application number
PCT/KR2009/001080
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English (en)
Korean (ko)
Other versions
WO2009110750A3 (fr
Inventor
이대상
윤철주
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2009110750A2 publication Critical patent/WO2009110750A2/fr
Publication of WO2009110750A3 publication Critical patent/WO2009110750A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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]
    • H05B45/40—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]
    • H05B45/20—Controlling the colour 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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 present invention relates to an LED lighting device, and more particularly, to an LED lighting device capable of controlling LED brightness of two or more colors by counting the number of control signals (pulses) output from a microcontroller.
  • LED Light Emitting Diode
  • LED Light Emitting Diode
  • red, green, and blue it has various colors due to the advantages of eco-friendly, low power consumption and semi-permanent. It is widely used for producing directing lighting.
  • DMX control method means a digital multiplexer signal and is the most common international standard standard used with the equipment associated with the light source.
  • DMX short for DMX512, uses RS-485 communication over two wires to transmit data at 250.000 bits per second (250kbps) and provides 512 channels per data link.
  • Each LED lighting device has a unique address (unique address), and receives a data code of a corresponding packet and uses the same to control lighting.
  • the method of driving the LED driver may be configured by various methods, and FIG. 1 illustrates a method of driving the LED driver.
  • Figure 1a is a method using a resistor as a current limiting device, in this case there is a disadvantage that the brightness of the LED changes according to the change of the input voltage.
  • FIG. 1B illustrates a method of configuring a constant current circuit using a regulator
  • FIG. 1C illustrates a method of configuring a constant current circuit using a transistor
  • FIG. 1D may control a constant current to flow through the LED with high efficiency by switching an input voltage using a switching element such as a transistor or a field effect transistor (FET). Therefore, such a circuit is mainly used for power LEDs of 1W or more and has an advantage of good efficiency, but has a disadvantage in that the circuit configuration is complicated and expensive.
  • a switching element such as a transistor or a field effect transistor (FET). Therefore, such a circuit is mainly used for power LEDs of 1W or more and has an advantage of good efficiency, but has a disadvantage in that the circuit configuration is complicated and expensive.
  • a method of controlling a direct current (DC) continuous current and a method of controlling a pulse current are used a lot. It is desirable to control the DC continuous current to provide the light output suitable for the human eye, but it has the disadvantage of slow response time and poor resolution.
  • the pulse current control method based on the modulation method (PWM, Pulse Width Modulation) is used.
  • FIG. 2 shows the output signal by the conventional pulse width modulation (PWM) method.
  • PWM pulse width modulation
  • the output signal is individually controlled by each independent duty cycle in which a predetermined period is divided into 256 steps, thereby controlling the brightness of 256 steps per LED. Therefore, when the duty cycle reaches 255 steps, the LED light output is 100%.
  • PWM pulse width modulation
  • the conventional pulse width modulation (PWM) method has a limit in controlling the current flowing through the LED, and when additional functions such as temperature control are added, there is a limit in lighting.
  • an object of the present invention is to provide a microcontroller with a different frequency of red, green, and blue LEDs having a constant frequency according to an input voltage.
  • the present invention provides an LED lighting device that outputs a control signal and counts the number of control signals (pulses) corresponding to each duty to reduce power consumption generated in the LED driver circuit and has various additional functions.
  • the LED lighting apparatus analyzes the input DMX data, and counts the number of control signals (number of pulses) according to the input DMX data and outputs a control signal.
  • the control signal output from the microprocessor is characterized in that it comprises an LED driver for controlling the operation of the LED and the LED to emit light under the control of the LED driver.
  • the LED is characterized in that it comprises two or more LEDs selected from among the red (RED), green (Green) and blue (BULE) LEDs.
  • the coefficient register compares the data value of each RGB LED received through DMX data with the counter value, and if it matches, disables the output of the PWM controller, and when the register value reaches 255, newly receives DMX data. Update and reset, and if the received data of the RGB LED is not 0, the output of the PWM controller (Enable) is characterized in that (Enable).
  • FIG. 7 is a circuit diagram for explaining the LED forward current control.
  • regulator 220 microcontroller
  • Figure 3 is a system configuration of the LED lighting apparatus according to a preferred embodiment of the present invention
  • Figure 4 is a block diagram of the LED lighting apparatus according to a preferred embodiment of the present invention
  • Figure 4 is a block diagram of the microcontroller of Figure 5 to be.
  • 6A is a block diagram illustrating a case where a resistor is used as the current limiting device according to the preferred embodiment of the present invention.
  • the LED's forward voltage varies slightly from manufacturer to manufacturer, but is typically 2.0 to 2.2V for red LEDs and 3.1 to 3.3V for green and blue LEDs.
  • the maximum forward current that can flow through the LED also varies depending on the type and manufacturer, but 35mA for high brightness LEDs and less than the maximum forward current when designing an actual LED circuit. .
  • V CE Collector-Emitter Saturation Voltage of Transistor Q1
  • the input voltage is changed according to the resistance value of the power supply line and the total amount of current flowing through the power supply line.
  • the register value for controlling the average current flowing through the LED is calculated as follows.
  • a peak and hold circuit and an amplification circuit may be replaced by a low pass filter as shown in FIG.
  • the count register 224 is then initially reset, and each time one pulse occurs, that is, each time a Timer / Count overflow occurs, the value of the count register is increased by one.
  • the 8-bit PWM mode of the corresponding LED is enabled.
  • analog-to-digital conversion measurements can be updated using the free running mode or periodically.
  • LED forward voltages vary slightly from manufacturer to manufacturer, but are roughly 2.1V for red LEDs and 3.3V for green and blue LEDs. Therefore, the input voltage applied to the LED must be applied to a voltage greater than the sum of each of the green or blue LEDs connected in series. In this case, a greater power consumption occurs in the constant current circuit used for the red LED. Especially with 100% duty cycle, the highest power consumption occurs.
  • the microcontroller since the duty ratio stored in the output comparison register 223 of the RGB LED is 180 for each of the red LEDs, and the DMX data transmitted in the first cycle is 2, the microcontroller generates two pulses having a duty ratio of 180. The counting (1-2 cycles) and the remaining cycles (3-255 cycles) are controlled to be off. Subsequently, since the DMX data of the next cycle (second cycle) is 255, the output is controlled by counting 255 pulses having a duty ratio of 180 (1-255 cycles).
  • the present invention is characterized in that the operation of the LED driver is controlled by calculating different duty ratios for each of the RGB LEDs and controlling the number of pulses corresponding to the transmitted DMX data to be output.

Landscapes

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

Abstract

L'invention concerne un dispositif d'éclairage à DEL et, plus particulièrement, un dispositif d'éclairage à DEL qui peut réguler la brillance de deux couleurs ou plus d'une DEL par comptage du nombre de signaux de commande (nombre d'impulsions) émis par un microcontrôleur. Le dispositif d'éclairage à DEL précité peut empêcher la génération de chaleur et limiter les pertes de puissance qui sont dues à la surintensité d'un circuit de commande. En outre, du fait de la brillance de chaque RVB, une DEL peut être régulée de manière stable, différents effets lumineux pouvant être produits.
PCT/KR2009/001080 2008-03-05 2009-03-04 Dispositif d'éclairage à del Ceased WO2009110750A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080020621A KR100949511B1 (ko) 2008-03-05 2008-03-05 Ｌｅｄ 조명기기
KR10-2008-0020621 2008-03-05

Publications (2)

Publication Number Publication Date
WO2009110750A2 true WO2009110750A2 (fr) 2009-09-11
WO2009110750A3 WO2009110750A3 (fr) 2009-10-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2009/001080 Ceased WO2009110750A2 (fr) 2008-03-05 2009-03-04 Dispositif d'éclairage à del

Country Status (2)

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KR (1) KR100949511B1 (fr)
WO (1) WO2009110750A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20100006A1 (it) * 2010-01-29 2011-07-30 Light & Colour Engineering S R L Dispositivo di illuminazione.
CN111954341A (zh) * 2020-09-03 2020-11-17 广州彩熠灯光股份有限公司 双频控制装置及方法、led舞台灯具
CN114731747A (zh) * 2019-11-12 2022-07-08 昕诺飞控股有限公司 被布置用于发射特定颜色光的基于发光二极管led的照明设备以及对应的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102322164B1 (ko) * 2021-06-08 2021-11-04 주식회사 지엘티 광섬유를 이용한 발광형 표지판

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4029319B2 (ja) * 2001-12-28 2008-01-09 東芝ライテック株式会社 照明制御システムおよび信号変換器
KR100658776B1 (ko) * 2005-10-24 2006-12-19 허윤석 색 조명기 제어장치
KR100811558B1 (ko) 2006-06-15 2008-03-11 김용철 엘이디를 이용한 회전식 조명장치

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20100006A1 (it) * 2010-01-29 2011-07-30 Light & Colour Engineering S R L Dispositivo di illuminazione.
CN114731747A (zh) * 2019-11-12 2022-07-08 昕诺飞控股有限公司 被布置用于发射特定颜色光的基于发光二极管led的照明设备以及对应的方法
CN111954341A (zh) * 2020-09-03 2020-11-17 广州彩熠灯光股份有限公司 双频控制装置及方法、led舞台灯具

Also Published As

Publication number Publication date
KR20090095338A (ko) 2009-09-09
KR100949511B1 (ko) 2010-03-24
WO2009110750A3 (fr) 2009-10-29

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