EP3366085A1 - Verfahren zur steuerung einer leuchteinrichtung und leuchteinrichtung - Google Patents
Verfahren zur steuerung einer leuchteinrichtung und leuchteinrichtungInfo
- Publication number
- EP3366085A1 EP3366085A1 EP16788457.6A EP16788457A EP3366085A1 EP 3366085 A1 EP3366085 A1 EP 3366085A1 EP 16788457 A EP16788457 A EP 16788457A EP 3366085 A1 EP3366085 A1 EP 3366085A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- lighting device
- light
- operating
- lighting
- 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.)
- Withdrawn
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]
- H05B45/10—Controlling the intensity of the light
- H05B45/18—Controlling the intensity of the light using temperature feedback
-
- 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
- H05B45/28—Controlling the colour of the light using temperature feedback
Definitions
- the invention relates to a method for controlling a lighting device with at least two light sources with different emission characteristics.
- incandescent lamps an electrical conductor is heated by an electric current flow and excited to glow or shine.
- the emission spectrum of a filament lamp can be specified on the one hand by a suitable choice of material and dimensioning of the current-carrying filament and on the other hand by an embodiment or coating of a filament
- a light-emitting diode With a light-emitting diode, a semiconductor light-emitting component, an electric current can be very efficiently converted into a light emission.
- the semiconductor materials used for the light-emitting diode and their doping the spectral properties of the light generated by the relevant light-emitting diode can be selected.
- emitted light usually has a very narrow and almost monochromatic wavelength range.
- the light-emitting semiconductor material with luminescent materials, one of the Semiconductor material radiated short-wave and thus high-energy light into long-wave light converted and a broad-band emission spectrum can be generated.
- Lighting device can be summarized to produce by a superposition of different emission ⁇ a characteristic emitted by the light emitting device spectral power distribution with the most advantageous properties.
- Light spectra are each particularly advantageous. For example, in a grocery store
- the emission characteristics of a light emitting diode are largely determined by the particular design, by the material and the production and are for
- Controlling device of the lighting device the individual light emitting diodes so driven or usually supplied with a pulse width modulated current that the
- Use cases can be modeled with sufficient accuracy.
- a peak wavelength of a light-emitting diode can change by several nanometers and optionally by about 10 nanometers or more when the temperature rises by 40 ° C.
- the peak wavelength also changes at a current flow of between 100 milliamps and 700 milliamps, these current values being within a typical range for one
- Lighting device would be very expensive and expensive.
- Detecting step at least one temperature-actual value and during a predetermined detection period at least one temperature change information are detected, wherein in a control signal generating step depending on the at least one detected temperature actual value and the at least one temperature change information new control signals for the respective control of the at least two light sources to issue a predetermined
- Color change is referred to as constant or as a constant light emission, provided that the upper limit specified by the threshold for a change in color of the light emission is below or at the edge of human perception.
- Temperature actual value can be one at the measured Adjusted temperature actual value causes change in the control signals, the new control signals for each
- Illuminant determined and the new control signals are transmitted to the operating device.
- Lighting means could be estimated by simulations and measurements and when setting new ones
- Control signals are taken into account.
- Lighting device can thus be adapted to changing temperatures very quickly and precisely and kept as constant as possible.
- the light emission of a lighting device for example
- Temperature changes are taken into account, for example, caused by a on a cloudy day and often changed solar irradiation
- Heating and cooling of the lighting device result.
- Lighting effect and these changes in the Preset new control signals are taken into account in order to keep the light emission of the lighting device as constant as possible despite changing temperatures.
- an operating temperature of the at least two light sources is detected as a temperature actual value.
- a trade ⁇ conventional, low-cost and very small temperature sensor can be used.
- the one temperature sensor can be spatially arranged in the vicinity of the lighting means such that the temperature sensor detects an average operating temperature of the various lighting means. It is also possible to arrange the one temperature sensor so that the operating temperature of the lamp (s) is detected, which is known to be the greatest dependence of the lamps
- Illuminant an operating temperature is detected as the temperature value of the respective bulb.
- differences in the operating temperature for the individual lamps can be detected and taken into account. For example, these differences can be due to a different power consumption and corresponding
- Heat emission of the individual lamps are caused, the proportion of the light emission in dependence on the predetermined light spectrum to be emitted by the lighting device, from bulb to bulb can be different. Other differences can be caused by the fact that a
- each bulb has in each case only a single lamp per lamp type.
- each bulb can have a separate
- the lighting device has in each case a plurality of similar lighting means per lamp type. Then each lamp type and thus a plurality of similar and expediently also spatially closely adjacent arranged bulbs can be assigned a single temperature sensor. It can also each bulb regardless of the type of lamp and its arrangement
- an advantageous embodiment of the inventive concept provides that a change in the ambient temperature is recorded as temperature change information in the detection step during the detection period.
- Temperature sensor to detect the ambient temperature and as little as possible from the heat output of
- Illuminant to be influenced during operation can be provided as far away as possible to arrange the temperature sensor or on a side facing away from the bulbs within a housing of the lighting device.
- the temperature sensor can instead also on a
- Illuminant is detected as temperature change information.
- control signal generating step from a memory device as a function of the at least one actual temperature value for each
- the starting parameters can be determined by simulations and measurements in advance
- Start parameters represent a first output value for the determination of the new control signals.
- Output value can be determined in advance for various actual temperature values with suitable approximation methods and stored in the memory device.
- the various starting parameters can be determined either as a function of a single temperature actual value or as a function of a number of actual temperature values, if separate for each of the plurality of lamps
- Temperature sensors can be used and read out.
- Temperature actual value is calculated in each case a spectral emission model, based on which the starting parameters for the control of the lighting means are determined. With a Taylor series development can be done with a small number of nodes of temperature and below
- Operating temperature and the operating current within the intended areas for a few minutes can be sufficient.
- the subsequent parameterization can also be carried out in the test bench with a sufficiently powerful data processing device in just a few minutes. The generated in this way
- Start parameters are determined and stored in the memory device can be significantly reduced, without affecting the spectral power distribution during the
- Control signal generating step of the correction parameter is determined by a mathematical approximation method in which a proportional component and an integral component in the approximation method are used to determine the correction parameter.
- the proportional component can be determined as a function of a temperature difference .DELTA. ⁇ , which is calculated as the difference of the measured temperature actual value of the nearest sample point temperature value.
- the integral component can also be determined as a function of the temperature difference .DELTA. ⁇ , wherein the temporal change of this
- the designated correction parameter may be
- the integral component may be either a single temperature change information or a small number of temperature change values
- a proportional component parameter and an integral component parameter are determined by means of simulations carried out in advance and / or reference measurements, which are used in the approximation method for determining the
- Proportional and the integral component can be used.
- the proportional component parameter P and the integral component parameter I can be determined by a number of
- the proportional share ⁇ parameter P and the integral term I parameters are respectively constant values.
- the light spectrum of the lighting device is selected from a number of predefined light spectra and is specified for a subsequent operating time.
- a number of light spectra with different color temperature can be preset and made available for selection by a user. The user can then choose, for example, between three or four different color temperatures that which appears particularly suitable for the intended use in the individual case.
- Providing a number of preconfigured light spectra facilitates user use and adjustment.
- the lighting device can have suitable input means and with a display device the respective predetermined
- Show light spectrum It is also possible to provide an interface to the memory device for specifying a light spectrum in order to be able to store there the light spectrum selected by a user or the parameters relevant for this purpose.
- the invention also relates to a lighting device, with a possible over a long period of time as possible constant light spectrum can be emitted.
- the lighting device according to the invention is a lighting device, with a possible over a long period of time as possible constant light spectrum can be emitted.
- Temperature sensor a memory device and a microprocessor having a control device, wherein the control device start parameters from the
- Memory device of the lighting device read, depending on at least one temperature change information measured with the temperature sensor one
- a temperature sensor can be a commercial,
- a single temperature sensor can be arranged spatially in the vicinity of the lighting means so that the
- Temperature sensor detects a mean operating temperature of the various bulbs. It is also possible to arrange the one temperature sensor so that the operating temperature of the lamp (s) is detected, which is known to be the greatest dependence of the lamps
- the temperature sensor is as far away as possible or on a side facing away from the light sources within a housing of the To arrange lighting device.
- the temperature sensor may instead also be on an outside of the housing
- Lamp has associated operating temperature sensor. It is possible that the lighting device has in each case only a single lamp per lamp type. In this case, each lamp can be assigned a separate operating temperature sensor, which is arranged close to the relevant lamp and essentially detects its operating temperature. It is also possible that the lighting device has in each case a plurality of similar lighting means per lamp type. Then every type of lamp and thus
- a single operating temperature sensor may be associated with a plurality of similar and expediently also spatially closely adjacent bulbs. It can also be any bulb regardless of the particular
- the luminous device comprises more than three different light-emitting diodes and at least one thereof a light emitting diode with a luminescent
- Wavelength converter has as a light source.
- Fig. 1 is a schematic representation of spectral
- FIG. 2 shows a schematic illustration of a spectral power distribution of a lighting device, which has a plurality of different light-emitting diodes, at two different operating temperatures, and
- Fig. 3 is a schematic representation of a
- FIG. 4 is a schematic representation of a variably configured lighting device with a plurality of light sources and with an ambient temperature sensor, and
- Fig. 5 is a schematic representation of a
- Illuminant carrier of a lighting device on which a plurality of lighting means and in each case an associated operating temperature sensor are arranged.
- Fig. 1 the spectral power distribution as a function of the emitted wavelength for two temperatures are shown schematically for different light-emitting diodes, wherein the dotted lines in each case the spectral Power distribution at 25 ° C and the dashed lines each show the spectral power distribution at 80 ° C. Illustrated here are the spectral
- Power distribution can be determined and measured for each LEDs 1 to 5, depending on the operating current. In addition, with increasing operating current of a light-emitting diode 1 to 5 also regularly increases
- plate-shaped lamp carrier 7 is arranged.
- Light source carrier 7 is set in a housing 8 so that the individual light-emitting diodes 1 to 5 emit a spectral power distribution during operation through a window opening 9 in the housing 8. The control of the individual LEDs 1 to 5 via a
- Control device 10 which supplies the individual light emitting diodes 1 to 5 in dependence on the respective control signals with a usually pulse width modulated operating current. Due to the superimposition of the different light spectra of the individual light-emitting diodes 1 to 5, the desired color of the lighting device 6
- LEDs 1 to 5 is of the respective
- Detecting period of, for example, one minute to a temperature sensor 11 on the plate-shaped light source carrier 7 between the individual light-emitting diodes 1 to 5 is arranged.
- the temperature sensor 11 transmits the measured temperature values to the control device 10 can be evaluated in the individual temperature measuring values and transferred to current actual temperature values, as well as in temperature-varying ⁇ information.
- the temperature change information for example, averaged over the detection period temperature difference, an averaged temperature gradient or over the
- Threshold exceeds or falls below or one
- Control device 10 in a control signal generating step determines the new control signals and in a
- Control step to be transmitted to an operating device 12, with which the operating current is provided for each light-emitting diode 1 to 5, to keep as constant as possible during operation of the lighting device 6 emitted by the lighting device 6 spectral power distribution.
- Control signals which have been previously determined, for example, via a Taylor series development as a function of temperature value support points and stored in a memory device 13, from the memory device 13
- a correction parameter Apwm is determined with a suitable mathematical approximation method, in which a proportional component and an integral component in the
- Control signals for the LEDs 1 to 5 determined that transmitted to the operating device 12 and for the
- the temperature sensor 11 is disposed on an upper side on the plate-shaped light source carrier 7 between the individual light-emitting diodes 1 to 5.
- the influence of a predetermined by the waste heat of the LEDs 1 to 5 operating temperature dominates, while the influence of caused by environmental influences heating or cooling of the housing 8 is low.
- the one temperature sensor 11 is also an average operating temperature of the
- Illuminant carrier 7 the influence of immediately adjacent light-emitting diodes 1 to 5 greater than the influence of further
- spaced light emitting diodes 1 to 5 is.
- the temperature sensor 11 in a window opening 9 facing away from the region of a side wall 14 of the housing 8 is arranged.
- the temperature sensor 11 is the influence of Ambient temperature greater and possibly dominant over the influence of the heat generated during operation of the LEDs 1 to 5 waste heat.
- Such an embodiment of the lighting device 6 is particularly useful for lighting devices that are mainly used outdoors and while individual
- used temperature sensor 11 may be referred to as operating temperature sensor and the temperature sensor 11 used according to the embodiment shown in Fig. 4 may be referred to as ambient temperature sensor.
- each light-emitting diode 1 to 5 each associated with a temperature sensor 11, the immediate
- Light-emitting diodes 1 to 5 can be emitted with this configuration a very precise temperature control and compared to a temperature average of a single temperature sensor 11 particularly constant spectral power distribution.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015117852.4A DE102015117852A1 (de) | 2015-10-20 | 2015-10-20 | Verfahren zur Steuerung einer Leuchteinrichtung und Leuchteinrichtung |
PCT/EP2016/074361 WO2017067822A1 (de) | 2015-10-20 | 2016-10-11 | Verfahren zur steuerung einer leuchteinrichtung und leuchteinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3366085A1 true EP3366085A1 (de) | 2018-08-29 |
Family
ID=57211479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16788457.6A Withdrawn EP3366085A1 (de) | 2015-10-20 | 2016-10-11 | Verfahren zur steuerung einer leuchteinrichtung und leuchteinrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200253017A1 (de) |
EP (1) | EP3366085A1 (de) |
CN (1) | CN108476566A (de) |
DE (1) | DE102015117852A1 (de) |
WO (1) | WO2017067822A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11079314B1 (en) | 2017-09-26 | 2021-08-03 | The United States Of America, As Represented By The Secretary Of The Navy | Photothermal deflection spectroscopy method for heating-cooling discrimination |
US11199449B1 (en) * | 2017-09-26 | 2021-12-14 | The United States Of America, As Represented By The Secretary Of The Navy | Automated noncontact method to discriminate whether cooling or heating is occurring |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007044556A1 (de) * | 2007-09-07 | 2009-03-12 | Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg | Verfahren und Vorrichtung zur Einstellung der farb- oder fotometrischen Eigenschaften einer LED-Beleuchtungseinrichtung |
US8558782B2 (en) * | 2009-03-24 | 2013-10-15 | Apple Inc. | LED selection for white point control in backlights |
DE102010006998A1 (de) * | 2010-02-05 | 2011-08-11 | Siteco Beleuchtungstechnik GmbH, 83301 | Temperaturkompensation des Lichtstroms an LED-Leuchten |
DE102011079796B4 (de) * | 2011-07-26 | 2015-08-13 | Flextronics Automotive Gmbh & Co.Kg | Verfahren zur Ermittlung von PWM-Werten für LED-Module |
JP2014157781A (ja) * | 2013-02-18 | 2014-08-28 | Panasonic Corp | 点灯装置及びそれを用いた照明器具 |
JP6277549B2 (ja) * | 2014-03-10 | 2018-02-14 | Tianma Japan株式会社 | 面状照明装置及び液晶表示装置 |
-
2015
- 2015-10-20 DE DE102015117852.4A patent/DE102015117852A1/de active Pending
-
2016
- 2016-10-11 CN CN201680074741.1A patent/CN108476566A/zh active Pending
- 2016-10-11 US US15/769,755 patent/US20200253017A1/en not_active Abandoned
- 2016-10-11 EP EP16788457.6A patent/EP3366085A1/de not_active Withdrawn
- 2016-10-11 WO PCT/EP2016/074361 patent/WO2017067822A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN108476566A (zh) | 2018-08-31 |
WO2017067822A1 (de) | 2017-04-27 |
DE102015117852A1 (de) | 2017-04-20 |
US20200253017A1 (en) | 2020-08-06 |
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