WO2014061866A1 - Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 - Google Patents
Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 Download PDFInfo
- Publication number
- WO2014061866A1 WO2014061866A1 PCT/KR2012/011436 KR2012011436W WO2014061866A1 WO 2014061866 A1 WO2014061866 A1 WO 2014061866A1 KR 2012011436 W KR2012011436 W KR 2012011436W WO 2014061866 A1 WO2014061866 A1 WO 2014061866A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- led
- led array
- resistance
- current
- lighting device
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 28
- 238000003491 array Methods 0.000 claims abstract description 68
- 238000012937 correction Methods 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002620 method output Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
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
-
- 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.
- a plurality of LEDs are connected in series to form an LED array, and the plurality of LED arrays are connected in parallel to form an LED module.
- the operating voltage (Vf) of the LED elements changes as the operation time increases, so that the current balance of the LED arrays connected in parallel Will be broken.
- the LED array including the LED device increases the operating voltage (Vf) of the LED device so that a current less than the normal current flows, or the operating voltage (Vf) of the LED device decreases, thereby causing the normal current. Greater current flows.
- the set current of the constant current generator does not change, the changed current in the deteriorated LED array causes the current to increase or decrease in other LED arrays that do not deteriorate.
- Korean Patent Publication No. 2009-0011744 provides a constant current circuit in each LED array to drive a constant current to drive an LED driving circuit for controlling an unbalance of current flowing through the LED unit. It is starting furnace.
- the LED driving circuit can prevent the lifespan of the LED from being shortened by blocking the voltage applied to the LED columns.
- the LED driving circuit can prevent the lifespan of the LED from being shortened by blocking the voltage applied to the LED columns.
- the LED driving circuit can prevent the lifespan of the LED from being shortened by blocking the voltage applied to the LED columns.
- the LED driving circuit can prevent the lifespan of the LED from being shortened by blocking the voltage applied to the LED columns.
- the LED driving circuit is used in the LED lighting device. There is a problem in that the lighting device is turned off so that it can no longer serve as the lighting device.
- the present invention provides an LED lighting device to protect the LED device by correcting so that the applied current is constant by reducing the overall resistance variation between the LED array, when the current balance between the LED array is broken.
- an LED lighting apparatus including: an LED module in which a plurality of LED arrays connected in series are connected in parallel; A constant current supply unit applying a constant current to the LED module; A variable resistor unit connected in series to each of the LED arrays; And a control unit controlling the constant current supply unit and the variable resistor unit, wherein the control unit calculates a compound resistance of each LED array when at least one of the measured current values of each LED array is out of a normal range, and calculates each LED array. If the synthesized resistors do not match, the variable resistor unit is adjusted to match the total resistance of each LED array to maintain current balance.
- the normal range may be 90% to 110% of the normal current.
- the controller when the loss power generated by adjusting the variable resistors connected to each of the LED array is smaller than a predetermined reference value, the controller adjusts the variable resistors to match the overall resistance. Can be.
- control unit is the normal range of the current value of each LED array, when the loss power generated by adjusting the variable resistors connected to each of the LED array is greater than a predetermined reference value
- the constant current supply unit may be controlled to accumulate current values of the LED arrays deviating from and to adjust the current value by the accumulated value of the increased or decreased current.
- the control unit is a range in which the loss power is equal to a predetermined reference value when the loss power generated by adjusting the variable resistors connected to each of the LED array is greater than a predetermined reference value. Adjust the variable resistance unit until the control unit, the current value of the LED array out of the normal range of the current value of each LED array in the state in which the variable resistance unit is adjusted and the constant current driver subtracts the adjusted current minus the accumulated current value from the rated current You can control the output.
- the reference value may be any value determined within 0.1% to 5% of the rated power.
- an LED lighting apparatus further includes a temperature sensing unit configured to measure a temperature of a heat sink disposed in the LED module, wherein the controller is configured to control each of the LED arrays when the temperature of the heat sink is within a reference temperature range.
- the composite resistance can be calculated.
- the control unit sequentially applies a measurement current to only one LED array to be applied to the corresponding LED array.
- V LED the composite resistance of each LED array is sequentially calculated, and the measured current may be a current value obtained by dividing the rated current by the number of the LED arrays.
- the controller may adjust the variable resistance connected in series with the remaining LED arrays based on the LED array having the largest synthetic resistance to match the total resistance of each LED array.
- variable resistor unit may be any one selected from a transistor, a FET, a JFET, an EMOSFET, and a potentiometer.
- An LED lighting apparatus includes a current sensing unit connected in series to each of the LED arrays.
- control unit blocks the corresponding LED array when at least one of the measured current value of each LED array is less than 30% or more than 130% of the normal current
- the constant current supply unit may be controlled to reduce the current value by the number.
- LED lighting device control method the step of determining whether the current value of each LED array is in the normal range; Measuring a composite resistance of each of the LED arrays when a current value of at least one of the respective LED arrays is out of a normal range; Calculating correction resistances such that the total resistances of the respective LED arrays match when the combined resistances of the respective LED arrays do not match; And controlling the variable resistor unit to have the calculated correction resistor to match the total resistance of each of the LED arrays.
- the resistance of each LED array may be matched to maintain the current balance with a minimum power loss.
- FIG. 1 is a view for explaining the LED lighting apparatus according to an embodiment of the present invention
- FIG. 2 is a flowchart illustrating a process of maintaining a current balance measured in each LED array according to an embodiment of the present invention.
- FIG. 3 is a flowchart illustrating a process of calculating a correction resistor to match the total resistance of each LED array.
- FIG. 1 is a view for explaining the LED lighting apparatus according to an embodiment of the present invention.
- the LED lighting apparatus includes an LED module 20 in which a plurality of LED arrays 21, 22... A constant current supply unit 10 for applying a constant current to the 20, a variable resistor unit 90 connected in series to each of the LED arrays 21, 22 ... 2N, and the constant current supply unit 10 and the variable resistor unit ( 90 includes a control unit 50 for controlling.
- the LED module 20 includes a plurality of LED arrays 21, 22... 2N connected in parallel, and each LED array 21, 22..., 2N has a plurality of LED elements connected in series.
- the size of the LED module 20 may be variously modified by the installation location, structure, and the like.
- the constant current supply unit 10 is a well-known configuration for applying a constant current to each of the LED arrays 21, 22 ... 2N.
- the DC input method includes a series pass method and a switching constant current method.
- the AC input method includes a converter method, and the output method outputs a DC constant current. It has the function to adjust the magnitude of the constant current output by the 5V control signal.
- the constant current supply unit 10 may use a device controlled by a PWM method, and the constant current supply unit 10 may use a device controlled by a serial communication method such as RS485.
- the constant current supply unit 10 according to an embodiment of the present invention may be composed of a single constant current supply unit.
- the variable resistor unit 90 is a type of current / voltage control element.
- the variable resistor unit 90 is connected in series to each of the LED arrays 21, 22 ... 2N, and has a resistance in response to a gate voltage signal applied from the controller 50. It is configured to be variable.
- the variable resistor unit 90 may be any one selected from a transistor TR, a FET, a JFET, an EMOSFET, and a potentiometer.
- the analog-to-digital converter 40 converts the current applied to each of the LED arrays 21, 22..., 2N, the output voltage of the constant current supply unit 10, and the heat sink temperature information into a digital signal.
- the sensing resistor 30 is connected in series to the LED arrays 21, 22. At this time, it is preferable that the resistance value is designed to be extremely small so that the efficiency of the LED lighting device is not lowered.
- the variable resistor unit 90 may be used to sense the current value of the LED arrays 21, 22.
- the control unit 50 when the power is applied, the set state of the constant current supply unit 10 (the normal state of the output voltage, the output constant current, the range of the maximum value, the minimum value) and the number of LED arrays 21, 22 ... 2N. It reads the set value, current threshold, voltage threshold and temperature threshold related to the variable resistance control of each LED array according to LED protection conditions and LEDs per string.
- controller 50 uses the analog-to-digital converter 40 to output currents I1, I2, I3, I4, ⁇ In, the output voltage V LED of the constant current supply unit 10, and temperature information of the heat sink.
- the controller 50 determines whether the measured current value of each of the LED arrays 21, 22..., 2N is outside the normal range.
- the normal range of the LED array may be set to 90% to 110% of the normal current, but is not necessarily limited thereto.
- One or more of the current values of the LED arrays 21, 22 ... 2N deviate from the normal range because the specific LED element deteriorates and the operating voltage Vf increases or decreases.
- the controller 50 calculates the combined resistance (equivalent resistance) of the LEDs included in each LED array 21, 22.
- variable resistor unit 90 is adjusted to adjust the LED arrays 21, 22.
- the current balance is maintained by matching the total resistance of .2N) (composite resistance of the LED array + correction resistance of the variable resistor + sensing resistance).
- variable resistor unit 90 since the variable resistor unit 90 is used without controlling the constant current supply unit 10, the current balance can be maintained with a minimum power loss.
- the controller 50 controls each LED array 21, 22. 2N), the constant current supply unit 10 may be controlled to accumulate the current value of the LED array outside the normal range from the current value, and to adjust the current value by the accumulated value of the increased or decreased current.
- the controller 50 adjusts the variable resistor unit 90 only to the extent that the total loss power is equal to a predetermined reference value, and then, among the current values of the LED arrays in the state where the variable resistor unit is adjusted, it is normal.
- the constant current supply unit 10 may be controlled to accumulate the current values of the LED arrays out of range and output the adjusted current minus the accumulated current value.
- variable resistor unit 90 is adjusted to a range corresponding to 1% of the rated power, and the normal resistance is corrected by the variable resistor unit 90. After accumulating the current value of the LED array out of range, it is possible to control the constant current supply unit 10 to output the adjusted current minus the accumulated current value.
- the reference value is illustrated as 1% of the rated power, but may be arbitrarily determined in the range of 0.1% to 5% of the rated power.
- the pulse width modulator 60 may control the magnitude of the constant current of the constant current supply unit 10 by adjusting and outputting the duty ratio of the pulse according to the signal received from the controller 50.
- the constant current supply unit 10 may select various interfaces other than the pulse width modulator.
- the communication unit 70 is connected to the current state (I1 ⁇ In) of each LED array (21, 22 ... 2N), the total output current (IT) of the constant current supply unit 10, the output voltage (V LED ) through the serial communication port ,
- the heat sink temperature, etc. can be configured for remote monitoring, and the current control of the LED arrays 21, 22 ... 2N (21, 22, 23, 24, ⁇ 2n) and the change of environmental setting value can be performed remotely.
- Provide a communication interface where possible. Through such a communication interface, correction resistance calculation control and variable resistance control, which will be described later, can be performed at a remote location, and the current balance between the LED arrays can be adjusted remotely.
- FIG. 2 is a flowchart illustrating a process of maintaining a current balance measured in each LED array according to an embodiment of the present invention
- FIG. 3 is a flowchart illustrating a process of calculating a correction resistor to match the total resistance to each LED array. .
- the control method comprises the steps of determining whether the current value of each of the LED array (21, 22 ... 2N) is in the normal range (S10), and which of the LED array (21, 22 ... Measuring the combined resistance of each of the LED arrays 21, 22 ... 2N when at least one current value is out of the normal range (S20), and If the synthesized resistance does not match, calculating the correction resistance so that the total resistance of each of the LED array (21, 22 ... 2N) (S30), and the variable resistor unit 90 to have the calculated correction resistance ) To match the total resistance of each of the LED arrays 21, 22 ... 2N (S40).
- step S10 of determining whether the current value of each of the LED arrays 21, 22, ... 2N is in the normal range will be described.
- the controller 50 receives the information including the current values of each of the LED arrays 21, 22 ... 2N (S11), and at least one of the LED arrays 21, 22 ... 2N is outside the normal range. In this case, it is determined that an abnormality has occurred in the LED device (S12). In this case, the normal range may be set to 90% to 110% of the normal current.
- the controller 50 determines whether the current value of the LED arrays 21, 22, ... 2N is out of the threshold range (S13).
- the threshold range may be defined as a range of 30% or more and 130% or less of the normal current.
- the constant current supply unit 10 is controlled (S14) so that the current value is reduced by the number of LED arrays.
- the LED element may be abnormal but not open or shorted. So that it no longer worsens.
- step (S20) of measuring the combined resistance of each LED array (21, 22 ... 2N), and the step (S30) of calculating the correction resistance will be described in detail with reference to FIG.
- the controller 50 may include structures, resistance variables, constant current information, and the like of the LED arrays 21, 22. Read (S210).
- the controller 50 reduces the constant current to maintain the measured current (S220).
- the measured current is the current value obtained by dividing the rated current by the number of N LED arrays (21, 22 ... 2N). For example, if there are five LED arrays 21, 22, ... 2N, a measurement current corresponding to one fifth of the rated current is applied. That is, the normal current of the corresponding LED array is applied.
- variable resistor unit 90 is selectively switched (S230) to select the LED arrays 21, 22..., 2N to be measured. For example, when the first LED array 21 is selected, only the variable resistor unit 90 of the first LED array 21 is switched on and the remaining N-1 LED arrays 22 ... 2N are switched on. Turn off to block.
- the controller 50 measures the output voltage (V LED ) according to the operating voltage (Vf) of the plurality of LED elements included in the first LED array 21 (S240), and according to the following equation 1 the first LED
- the synthesized resistance (equivalent resistance) of the array 21 is calculated (S250).
- step S40 of matching the total resistance the controller 50 determines whether the total loss power generated when the calculated correction resistor is applied is increased by 1% or more of the rated power (S41).
- variable resistor unit 90 When the total loss power is less than 1% of the rated power, the variable resistor unit 90 is controlled to apply the correction resistor to match the total resistance of each of the LED arrays 21, 22 ... 2N (S42).
- each LED array 21, 22 ... 2N is used.
- the constant current supply unit 10 may be controlled (S43) so that the current value is adjusted by the accumulated value of the increased or decreased current.
- variable resistance unit 90 is adjusted to a range where the loss power is equal to a predetermined reference value, and the current values of the LED arrays outside the normal range are accumulated in the state where the overall resistance is corrected by the variable resistance unit 90. Thereafter, the constant current supply unit 10 may be controlled to output the adjustment current minus the accumulated current value from the rated current.
- the reference value is illustrated as 1% of the rated power, but may be arbitrarily determined in the range of 0.1% to 5% of the rated power.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims (13)
- 다수 개의 LED 소자가 직렬 연결된 LED 어레이가 다수 개 병렬로 접속된 LED 모듈;상기 LED 모듈에 정전류를 인가하는 정전류 공급부;상기 각 LED 어레이에 직렬 연결된 가변 저항부; 및상기 정전류 공급부와 가변 저항부를 제어하는 제어부를 포함하되,상기 제어부는 측정된 각 LED 어레이의 전류값 중 하나 이상이 정상범위를 벗어난 경우에는 상기 가변 저항부를 조절하여 각 LED 어레이의 전체저항을 일치시켜 전류 밸런스를 유지하는 LED 조명장치.
- 제1항에 있어서,상기 제어부는 측정된 각 LED 어레이의 전류값 중 하나 이상이 정상범위를 벗어난 경우에는 각 LED 어레이의 합성저항을 산출하고, 상기 각 LED 어레이의 합성저항이 일치하지 않는 경우에는 상기 가변 저항부를 조절하되, 상기 정상범위는 정상 전류의 90% 내지 110%인 LED 조명장치.
- 제2항에 있어서,상기 제어부는 상기 각 LED 어레이에 연결된 가변 저항부를 조절함으로써 발생하는 손실전력이 미리 정해진 기준치보다 작은 경우에는,상기 가변 저항부를 조절하여 전체저항을 일치시키는 LED 조명장치.
- 제2항에 있어서,상기 제어부는 상기 각 LED 어레이에 연결된 가변 저항부를 조절함으로써 발생하는 손실전력이 미리 정해진 기준치보다 큰 경우에는,상기 손실전력이 미리 정해진 기준치와 동일해지는 범위까지 상기 가변 저항부를 조절하고,상기 가변 저항부가 조절된 상태에서 각 LED어레이의 전류값 중에서 상기 정상범위를 벗어난 LED어레이들의 전류치를 누적하고 상기 정전류구동부가 정격전류에서 상기 누적한 전류치를 뺀 조정전류를 출력하도록 제어하는 LED 조명장치.
- 제3항 또는 제4항에 있어서,상기 기준치는 정격전력의 0.1% 내지 5% 내에서 정해진 임의의 값인 LED 조명장치.
- 제2항에 있어서,상기 제어부는 측정된 각 LED 어레이의 전류값 중 하나 이상이 정상범위를 벗어난 경우,순차적으로 하나의 LED 어레이에만 측정전류를 인가하여 해당 LED 어레이에 걸리는 전압(VLED)을 측정함으로써 각 LED 어레이의 합성저항을 순차적으로 산출하는 LED 조명장치.
- 제6항에 있어서,상기 제어부는 합성저항이 가장 큰 LED 어레이를 기준으로 나머지 LED 어레이에 직렬 연결된 가변 저항을 조절하여 각 LED 어레이들의 전체저항을 일치시키는 LED 조명장치.
- 제1항에 있어서,상기 LED 조명장치는 원격지에서 상기 제어부와 접속된 인터페이스를 통하여 조명장치의 설정값을 제어하고, 조명장치의 상태를 감시하는 LED 조명장치.
- 제1항에 있어서,상기 각 LED 어레이에 직렬 연결된 전류 센싱부를 포함하는 LED 조명장치.
- 제2항에 있어서,상기 제어부는 측정된 각 LED 어레이의 전류값 중 하나 이상이 정상 전류의 30% 이하이거나 130%이상인 경우에는, 해당 LED 어레이를 차단시키고 상기 차단된 LED 어레이의 개수만큼 전류값이 감소되도록 정전류 공급부를 제어하는 LED 조명장치.
- 각 LED 어레이의 전류값이 정상 범위인지 판단하는 단계;상기 각 LED 어레이 중 어느 하나 이상의 전류값이 정상 범위를 벗어난 경우에 상기 각 LED 어레이의 합성저항을 측정하는 단계;상기 각 LED 어레이의 합성저항이 일치하지 않는 경우, 상기 각 LED 어레이의 전체저항이 일치되도록 보정저항을 산출하는 단계;상기 산출된 보정저항을 갖도록 가변 저항부를 제어하여 상기 각 LED 어레이의 전체저항을 일치시키는 단계;를 포함하는 LED 조명장치 제어방법.
- 제11항에 있어서, 상기 보정저항을 산출하는 단계는,순차적으로 하나의 LED 어레이에만 측정전류를 인가하고 해당 LED 어레이에 걸리는 전압(VLED)을 측정함으로써 각 LED 어레이의 합성저항을 순차적으로 산출하는 LED 조명장치 제어방법.
- 제11항에 있어서, 상기 전체저항을 일치시키는 단계에서,상기 각 LED 어레이에 연결된 가변 저항부를 조절함으로써 발생하는 손실전력이 미리 정해진 기준치보다 작은 경우에는,상기 가변 저항부를 조절하여 전체저항을 일치시키는 LED 조명장치 제어방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015538004A JP6193383B2 (ja) | 2012-10-17 | 2012-12-26 | Led素子の寿命を保護するled照明装置及びその制御方法 |
US14/436,103 US9386650B2 (en) | 2012-10-17 | 2012-12-26 | LED lighting device and method of controlling the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2012-0115536 | 2012-10-17 | ||
KR20120115536 | 2012-10-17 | ||
KR10-2012-0152898 | 2012-12-26 | ||
KR20120152898A KR101493844B1 (ko) | 2012-10-17 | 2012-12-26 | Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014061866A1 true WO2014061866A1 (ko) | 2014-04-24 |
Family
ID=50488412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2012/011436 WO2014061866A1 (ko) | 2012-10-17 | 2012-12-26 | Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2014061866A1 (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104822204A (zh) * | 2015-05-05 | 2015-08-05 | 成都瑞昌仪器制造有限公司 | 一种光谱可调的led诱虫装置 |
CN111163566A (zh) * | 2020-02-26 | 2020-05-15 | 广东轻工职业技术学院 | 亮度和色度可调的组合式3d rgb led光立方装置及控制方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006108519A (ja) * | 2004-10-08 | 2006-04-20 | Shindengen Electric Mfg Co Ltd | Led点灯駆動回路 |
JP2010267481A (ja) * | 2009-05-14 | 2010-11-25 | Hitachi Displays Ltd | バックライト装置および表示装置 |
KR101005199B1 (ko) * | 2010-09-02 | 2010-12-31 | (주)상지기술 | 엘이디 조명기구의 엘이디 부하 비정상상태 발생시 엘이디 보호장치 |
KR20110057359A (ko) * | 2009-11-24 | 2011-06-01 | 한국광기술원 | 발광 다이오드의 정전류 공급 장치 및 그 방법 |
KR20110066664A (ko) * | 2009-12-11 | 2011-06-17 | 삼성엘이디 주식회사 | Led 구동 장치 |
-
2012
- 2012-12-26 WO PCT/KR2012/011436 patent/WO2014061866A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006108519A (ja) * | 2004-10-08 | 2006-04-20 | Shindengen Electric Mfg Co Ltd | Led点灯駆動回路 |
JP2010267481A (ja) * | 2009-05-14 | 2010-11-25 | Hitachi Displays Ltd | バックライト装置および表示装置 |
KR20110057359A (ko) * | 2009-11-24 | 2011-06-01 | 한국광기술원 | 발광 다이오드의 정전류 공급 장치 및 그 방법 |
KR20110066664A (ko) * | 2009-12-11 | 2011-06-17 | 삼성엘이디 주식회사 | Led 구동 장치 |
KR101005199B1 (ko) * | 2010-09-02 | 2010-12-31 | (주)상지기술 | 엘이디 조명기구의 엘이디 부하 비정상상태 발생시 엘이디 보호장치 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104822204A (zh) * | 2015-05-05 | 2015-08-05 | 成都瑞昌仪器制造有限公司 | 一种光谱可调的led诱虫装置 |
CN111163566A (zh) * | 2020-02-26 | 2020-05-15 | 广东轻工职业技术学院 | 亮度和色度可调的组合式3d rgb led光立方装置及控制方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012023653A1 (ko) | 발광 다이오드 어레이 구동회로 | |
WO2012144864A2 (ko) | 엘이디 소자를 보호하는 엘이디 조명 장치 및 그 조명 장치의 제어 방법 | |
US7969430B2 (en) | Voltage controlled backlight driver | |
WO2014025159A2 (ko) | 발광소자를 이용한 조명장치의 디밍 시스템 | |
KR20140049440A (ko) | Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 | |
KR101676440B1 (ko) | 백라이트 유닛, 이의 구동 방법 및 이상 검출 방법 | |
WO2014209009A1 (ko) | 발광 다이오드 조명 장치 및 그의 제어 회로 | |
WO2012091258A1 (en) | Power supply | |
WO2015041393A1 (ko) | 발광 다이오드 조명 장치의 제어 회로 | |
US8378586B2 (en) | Distributed architecture voltage controlled backlight driver | |
TWI433600B (zh) | 背光模組及驅動電路 | |
WO2014058082A1 (ko) | Led 조명기기 제어 시스템 | |
WO2016108615A1 (ko) | 램프 제어 장치 | |
WO2014133335A1 (ko) | 발광 다이오드 조명 장치의 제어 회로 | |
KR100936815B1 (ko) | 멀티 채널 발광 다이오드 구동장치 | |
WO2014061866A1 (ko) | Led소자의 사용수명을 보호하는 led조명장치 및 그 제어방법 | |
WO2014030895A1 (ko) | 전류원의 시간지연 기능을 갖는 엘이디 구동회로 | |
WO2012033295A2 (ko) | 전력손실 및 발열을 최소화하기 위한 엘이디 전원공급장치 및 엘이디 전원공급방법 | |
WO2014069939A1 (ko) | 전원전압 변화 시의 광량 보상 기능을 갖는 엘이디 조명 구동회로 | |
WO2013027886A1 (ko) | 엘이디 스트링의 구동 장치 | |
WO2014208989A1 (ko) | 발광 디바이스의 구동 회로 및 상기 구동 회로를 채용한 반도체 칩 | |
WO2021117990A1 (ko) | 고효율 및 고신뢰성을 구비한 차량 조명용 led 시스템 | |
KR20220145075A (ko) | Led 소자를 보호하는 led조명장치 | |
WO2009110750A2 (ko) | Led 조명기기 | |
WO2014014248A1 (en) | Power supply circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12886800 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14436103 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2015538004 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 02-07-2015) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12886800 Country of ref document: EP Kind code of ref document: A1 |