EP2335454A2 - Apparatus for operating leds - Google Patents
Apparatus for operating ledsInfo
- Publication number
- EP2335454A2 EP2335454A2 EP09741180A EP09741180A EP2335454A2 EP 2335454 A2 EP2335454 A2 EP 2335454A2 EP 09741180 A EP09741180 A EP 09741180A EP 09741180 A EP09741180 A EP 09741180A EP 2335454 A2 EP2335454 A2 EP 2335454A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- memory
- led
- operating leds
- led module
- leds
- 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 238000012937 correction Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 8
- 230000001419 dependent effect Effects 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 4
- 238000005286 illumination Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
-
- 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
- H05B45/22—Controlling the colour of the light using optical feedback
Definitions
- the invention relates to a device for operating LEDs according to the preamble of patent claim 1 and a method for operating LEDs according to the preamble of patent claim 27.
- Such devices are used in lighting systems to achieve a colored or flat lighting of rooms, paths or escape routes. Usually, the bulbs are driven by operating devices and activated as needed. For such illumination, organic or inorganic light emitting diodes (LED) are used as the light source.
- LED organic or inorganic light emitting diodes
- light-emitting diodes are also increasingly being used as the light source.
- the efficiency and luminous efficacy of light-emitting diodes is being increased more and more so that they are already being used in various general lighting applications.
- light emitting diodes are point sources of light and emit highly concentrated light.
- the solution according to the invention for a device for operating LEDs is based on the idea that an LED module controlled by the driver module is present with at least one LED, and a memory for storing information about the LED.
- the memory can be contained either in the driver module or in the LED module and the information can be changed in the memory. In this way it is possible to achieve a very consistent and uniform illumination of a surface by a light source with LEDs.
- Fig. 1 shows a device for operating LED according to the prior art
- FIGS. 2 to 3c show an embodiment of a device according to the invention
- FIGS. 4 to 5 show an embodiment of an application by a user of the invention
- Fig. 1 shows the prior art.
- This device has a driver module 1, and an LED module 5, controlled by the driver module 1, with at least one LED.
- the LED of the LED module 5 can be selectively controlled via the various An Kunststoffauche- (via the wiring 4).
- the invention is based on a
- This device has a driver module 1, and an LED module 5 controlled by the driver module 1 with at least one LED, with a memory for storing information about the LED module 5, wherein the memory is either in the driver module 1 or may be contained in the LED module 5 and the information can be changed in the memory.
- the memory is preferably designed so that it is non-volatile, that is, it is retained even when a switch-off or failure of the supply voltage.
- a flash memory can be used.
- the memory may be included in a driver module 1.
- the driver module 1 has connections 2 and 3 to which one or more LEDs on a (preferably common) LED module 5 are located via the wiring 4.
- the LED module 5 may be, for example, a circuit board or a base support, on which one or more LEDs are arranged.
- the LEDs can be embodied, for example, as a wired LED, as an SMD LED or as a COB LED (chip-on-board LED).
- the LED module 5 may also have means for ' heat dissipation or cooling.
- the LEDs can also be selectively controlled via individually controllable channels (via the wiring 4).
- the individually controllable LED can be selectively controlled on an LED module 5 (for example, turned on, turned off and changed in their brightness).
- the information in the memory can be changed based on a calibration measurement.
- the information in the memory can be changed by a correction factor.
- the information in memory may be modified by a correction factor determined based on a calibration measurement.
- the correction factor can be changed by a user, for example via a specification via an interface 7.
- the interface 7 can use both a wired and a wireless transmission.
- the change of the correction factor for example by a user, may be due to a calibration measurement. This calibration measurement may be performed by a measurement with a sensor 6 (as later described with reference to FIGS. 4 and 5) or only via the user's visual perception.
- the correction factor may be dependent on the aging or the operating time of the LED module 5.
- the correction factor may be dependent on the temperature of the LED module 5.
- the temperature of the LED module 5 can be determined directly via a temperature measurement with a temperature measuring element or indirectly, for example via the evaluation of the characteristic curve of the LED.
- a sensor 6 can be used, which is introduced into the lighting system for the calibration measurement.
- the correction factor may be dependent on a color measurement.
- the color measurement can be done by means of an RGB color measurement, for example a CCD sensor. In this case, the sensor 6 would be an RGB color sensor.
- the determination of the correction factor can be repeated at regular intervals.
- the memory can be read out by the driver module via a (preferably digital) interface 7.
- the memory can be located on the LED module 5 and read when replacing the LED module 5 by the user.
- the memory may be located on the LED module 5 and read out before replacement of the LED module 5 by the driver module 1 due to a signaling by the user.
- the memory can also be arranged in a calibration device or on the driver module 1.
- Information about the type of LED, the wavelength, the color location and / or the intensity of the LED can be stored in the memory. Furthermore, other operating parameters such as the required setpoint operating current through the LED or the maximum permissible current through the LED or also the maximum permissible voltage through the LED can be stored as information in the memory.
- the signaling for reading the memory on the LED module 5 can be done by the user by a switching sequence on the supply voltage, a digital control command or by other signaling.
- the information read out can be stored in the memory of the new LED module 5.
- the driver module 1 can forward the information stored in the memory via a (preferably digital) interface 7 to other driver modules.
- one or more LED modules 5 can be switched off.
- 5 individually controllable channels can be selectively switched off within an LED module, so that the individually controllable LED on an LED module 5 can be selectively switched off.
- only one LED module 5 or only one channel of an LED module 5 can be switched on in each case.
- the color measurement can be carried out with a sensor 6 (for example an RGB color sensor, preferably a CCD sensor).
- the sensor ⁇ can also be formed by a plurality of photodiodes, each having a color filter •), so that the photodiodes can be excited only by certain wavelengths or ' wavelength ranges.
- the sensor 6 may be placed so that it can receive a part of the light emitted by the LED modules 5.
- the sensor 6 may be placed so that it is shielded from ambient light and can only receive light emitted by the LED modules 5.
- This partitioning can be done by a cover that is specially designed for the calibration measurement.
- the sensor 6 may be located.
- the sensor 6 can also be placed on the reflector 10 of the LED lamp.
- the sensor 6 may be placed so as to directly or indirectly receive the light of the LED of the LED module 5.
- the color location and / or the intensity of the LED can be stored so that this information can be stored in the memory.
- the individual LED modules 5 can be switched on and calibrated one after the other.
- the calibration can be used to determine the colors of the connected LED modules 5.
- the individual colors or color locations and / or the intensities of the respectively driven LEDs are determined.
- An LED module 5 can have different LEDs, which can preferably be controlled independently of each other (selectively) via individual channels. These different LEDs may differ, for example , in terms of their wavelength, color location and / or intensity. From the combination of the individual calibration measurements, which are carried out in succession, the assignment of the colors and the mixture of the individual LEDs required for the output of a desired color by the LED illumination can be determined.
- LED module 5 may be present, wherein the memory may be contained either in the driver module 1 or in the LED module 5 and the information in the memory can be changed.
- the driver module 1 may include a switching regulator, for example an AC-DC converter or DC-DC converter.
- the driver module 1 can be connected to a supply voltage 8 (for example AC mains voltage).
- the driver module 1 can be a PFC
- the PFC can be formed for example by a boost converter, buck-boost converter, a flyback converter or by a Valley FiIl circuit.
- the driver module 1 may have a potential separation. This isolation can be done for example via a transformer.
- the driver module 1 may include, for example, a flyback converter, a forward converter or a half-bridge converter with transformer.
- the driver module 1 has a PFC, it can be implemented as a so-called single-stage topology, for example by a flyback converter operating in the so-called borderline mode or else by a so-called two-stage topology, for example by a boost converter with a subsequent half-bridge topology. Converter with transformer, be executed.
- the driver module 1 may have means for controlling the current through one or more LEDs of the LED module 5, the voltage across the LED of the LED module 5 or also the LED of the LED module 5 supplied power.
- the detection of the current by one or more LEDs of the LED module 5 and / or the voltage across the LED of the LED module 5 can be done by means of resistors or by other sensor means such as a current orchroresüberwachungstransformators.
- the operation of the LEDs can be such that an LED module 5 is controlled by at least one LED from a driver module .1, and a memory for storing information about the LED module 5 is present, with information stored in memory or can be changed.
- the information in the memory can be changed based on a calibration measurement.
- the information in the memory can be changed by a correction factor.
- the memory may be arranged on the LED module 5, in a calibration device or on the driver module 1.
- the calibrator can also be connected to the Be interface 7 connected control device, which sends the data of the memory to the driver module 1 at each start of the device for operating LEDs. In this case, it can be dispensed with that in each LED module 5 or each driver module 1, a memory must be present.
- the data of the sensor 6 are read out and the determined data for this channel (or the driven LED) is stored.
- the controlled channel (or the activated LED) is set back to the low intensity value and in the next step another channel (another LED) is driven to the maximum brightness (or to a predefined high brightness value).
- the data of the sensor 6 are read out again and the determined data for the corresponding channel (or the driven LED) is stored. These steps are repeated until all channels (or LED) have been activated and their corresponding sensor data has been read out and stored.
- the calibration measurement may be due to a signaling that a calibration measurement is to be performed (for example, by a signaling that a calibration measurement is to be performed (for example, by a signaling that a calibration measurement is to be performed (for example, by a signaling that a calibration measurement is to be performed (for example, by a signaling that a calibration measurement is to be performed (for example, by a signaling that a calibration measurement is to be performed (for example, by a
- Age determination command it is also possible to initiate the calibration measurement on the basis of a sequence of a counter, for example as a function of the operating time of the LED module 5 or depending on a given date.
- all the LEDs of an LED module 5 are set to a low intensity value.
- This low intensity value may also be the off state, but it may also be a negligible intensity value.
- At least one channel is driven to the maximum brightness (or to a predefined high brightness value). Now the data of the sensor 6 are read out and the determined data for this channel (or the driven LED) is stored.
- the controlled channel or the activated LED
- another channel is driven to the maximum brightness (or to a predefined high brightness value). Now the data of the sensor 6 are read out again and the determined data for the corresponding channel (or the driven LED) is stored.
- an age determination of the LED of an LED module 5 can be performed by comparison with previously stored data.
- the previously stored data may be data stored by the LED manufacturer (in memory) or also data from a previous calibration measurement.
- the data obtained can also be determined by the existing
- Interface 7 or by an optical or acoustic visualization are transmitted to the user.
- an optical or acoustic visualization for example, flashing the LED of an LED module 5
- a replacement required in the near future can be displayed optically.
- the expected replacement or maintenance date can also be transmitted.
- an LED module 5 is driven by at least one LED from a driver module 1, and a memory for storing information about the LED module 5 is present, wherein information is stored or modified in the memory can.
- the information in the memory can be changed based on a calibration measurement.
- the information in the memory can be changed by a correction factor.
- the method for carrying out the calibration measurement can be carried out according to the steps described with reference to FIGS. 4 and 5.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT5152008 | 2008-09-22 | ||
PCT/AT2009/000368 WO2010031103A2 (en) | 2008-09-22 | 2009-09-22 | Apparatus for operating leds |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2335454A2 true EP2335454A2 (en) | 2011-06-22 |
EP2335454B1 EP2335454B1 (en) | 2013-09-04 |
Family
ID=42039932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09741180.5A Active EP2335454B1 (en) | 2008-09-22 | 2009-09-22 | Apparatus for operating leds |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2335454B1 (en) |
CN (1) | CN102160462B (en) |
DE (1) | DE112009002327A5 (en) |
WO (1) | WO2010031103A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2005929C2 (en) * | 2010-12-28 | 2012-07-02 | Eldolab Holding Bv | Led driver, lighting device and led based lighting application. |
DE102011103907A1 (en) * | 2011-02-17 | 2012-08-23 | Siteco Beleuchtungstechnik Gmbh | LED light |
NL2009458C2 (en) * | 2012-09-13 | 2014-03-18 | Eldolab Holding Bv | Led fixture and led lighting arrangement comprising such led fixture. |
AT517625A1 (en) * | 2015-09-07 | 2017-03-15 | Mat Center Leoben Forschung Gmbh | Method and device for monitoring a semiconductor module |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7161313B2 (en) * | 1997-08-26 | 2007-01-09 | Color Kinetics Incorporated | Light emitting diode based products |
US7026769B2 (en) * | 2003-12-18 | 2006-04-11 | Joon Chok Lee | Luminary control system adapted for reproducing the color of a known light source |
WO2007148250A1 (en) * | 2006-06-20 | 2007-12-27 | Koninklijke Philips Electronics N.V. | Illumination system comprising a plurality of light sources |
US20080062070A1 (en) * | 2006-09-13 | 2008-03-13 | Honeywell International Inc. | Led brightness compensation system and method |
-
2009
- 2009-09-22 DE DE112009002327T patent/DE112009002327A5/en not_active Withdrawn
- 2009-09-22 WO PCT/AT2009/000368 patent/WO2010031103A2/en active Application Filing
- 2009-09-22 EP EP09741180.5A patent/EP2335454B1/en active Active
- 2009-09-22 CN CN2009801371237A patent/CN102160462B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2010031103A2 * |
Also Published As
Publication number | Publication date |
---|---|
CN102160462B (en) | 2013-12-04 |
WO2010031103A2 (en) | 2010-03-25 |
EP2335454B1 (en) | 2013-09-04 |
DE112009002327A5 (en) | 2011-09-29 |
WO2010031103A3 (en) | 2010-07-15 |
CN102160462A (en) | 2011-08-17 |
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