EP3207763A1 - Verfahren zur ansteuerung einer led-leuchte und led-leuchte - Google Patents
Verfahren zur ansteuerung einer led-leuchte und led-leuchteInfo
- Publication number
- EP3207763A1 EP3207763A1 EP15774612.4A EP15774612A EP3207763A1 EP 3207763 A1 EP3207763 A1 EP 3207763A1 EP 15774612 A EP15774612 A EP 15774612A EP 3207763 A1 EP3207763 A1 EP 3207763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- led
- light
- spectrum
- stk
- arrangement
- 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
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- YJPIGAIKUZMOQA-UHFFFAOYSA-N Melatonin Natural products COC1=CC=C2N(C(C)=O)C=C(CCN)C2=C1 YJPIGAIKUZMOQA-UHFFFAOYSA-N 0.000 description 8
- 229960003987 melatonin Drugs 0.000 description 8
- DRLFMBDRBRZALE-UHFFFAOYSA-N melatonin Chemical compound COC1=CC=C2NC=C(CCNC(C)=O)C2=C1 DRLFMBDRBRZALE-UHFFFAOYSA-N 0.000 description 8
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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]
- H05B45/20—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]
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
Definitions
- the invention relates to a method for driving an LED light, which comprises at least a first LED array and a second LED array, wherein the first LED array and the second LED array in operation light with different light spectra, d. H. with different mean color temperatures, send out. These different light spectra then mix to form a total light spectrum of the LED light.
- An LED arrangement may consist of a single LED or several LEDs, e.g. an LED assembly comprising a plurality of LEDs to be driven together.
- the invention relates to a corresponding LED lamp.
- the user has the ability to change the overall light spectrum or the color temperature of the LED light and thus adapt to its current needs and / or mood by driving the various LED arrangements.
- the proportions of the light emitted by the first LED arrangement and the second LED arrangement are controlled within the overall light spectrum of the LED arrangements in accordance with a predetermined, in particular time-of-day, circadian spectrum control curve.
- a spectrum control curve could be such that in the morning at the start of work, the blue light component or cold light component is slowly increased in order to further assist the user during a particularly active phase in the morning, whereas at midday the blue light component is shut down again, to prepare the user for the midday rest by the biological effect of light.
- this spectral control function is preferably a melanopically effective time-dependent, in particular circadian spectrum control curve, which can act on the melatonin household of the user visually by the light color or the blue component.
- a temporary short-term dose variation signal preferably a dose increase signal
- at least the first LED array is driven for a predefined dose change period, preferably dose increase period, temporarily deviating from the predetermined control curve to operate at a predetermined minimum power or proportion of the light of this first LED array within the total light spectrum of the LED arrays is a certain minimum proportion and that after expiration of the predefined dose change period, the LED arrays are driven according to a predetermined control rule so that the total light spectrum again corresponds to the predetermined spectrum control curve.
- the respective proportions of the light of the LED arrangements are again selected so that light is emitted with the total color temperature or overall light spectrum predetermined at that time by the spectrum control function. This corresponds to a kind of superposition of the actual spectrum control function by a controller according to the temporary short-term dose change signal.
- the first LED arrangement preferably has a light spectrum with a greater proportion of blue light than the second LED
- the first LED array is particularly preferably a LED array. Arrangement for emitting cold white LED light and in the second LED array to an LED array for emitting warm white light. The short-term increase in cold light can provide greater suppression of melatonin output, which increases serotonin and makes the user a little more awake and fresher.
- the first LED array radiates the warmer light
- the second LED array emits the colder light.
- the short-term dose change signal would have exactly the opposite effect, namely that the proportion of warm light is increased significantly for a short time. This is useful, for example, if the user decides that he would like to perform a short-term relaxation exercise, for example a meditative short-term relaxation or the like, in which an excessively high proportion of blue light could possibly interfere.
- a short-term relaxation exercise for example a meditative short-term relaxation or the like, in which an excessively high proportion of blue light could possibly interfere.
- the definition of which LED arrangement is the first and which the second LED arrangement is initially arbitrary.
- Crucial is the automatic return to the preset optimized spectrum control function, in particular spectrum control curve, after the predetermined dose change period, so that especially in the first case when the blue light level is increased, the user is not overstimulated, although he actually according The optimized spectrum control function normally requires less stimulation at this time.
- the short-term dose change signal can temporarily increase the effect of serotonin or melatonin, it will be simplified in the following, irrespective of whether temporarily a completely or relatively increased proportion of blue light for refreshment or an absolutely or relatively increased proportion of warm light is output for reassurance.
- the predefined dose change period is accordingly referred to as "boost period” or the operating mode in which the LED light or at least the first LED arrangement is operated during the boost period as “boost mode”. designated.
- a first boost signal in the direction of increasing the proportion of cold light to increase it in the short term, and vice versa upon receipt of a corresponding the second boost signal in the warm light direction, the proportion of warm light is increased in a reverse manner.
- corresponding interfaces may be provided to each specify a boost signal in the desired direction.
- a temporary calming phase could be coupled with a subsequent short refreshing phase, so that the user is more easily "awake" again.
- An LED luminaire which is particularly preferably a desk lamp, floor lamp, wall lamp or ceiling lamp (also suspended luminaire), has at least a first LED array and at least a second LED array, wherein the first LED array and the second LED array in operation emitting light with different light spectra.
- one of the LED assemblies e.g. B. the first LED array, cold white LED light (preferably over 5000 K, more preferably about 6500 K or above) from and another LED arrangement, eg. B. the second LED array, warm white light (preferably below 3300 K, more preferably about 2700 K or below).
- the one LED arrangement u. a.
- Each LED array preferably comprises a group of LEDs.
- This LED lamp also includes a control arrangement, for example, as will be explained later, a control device or a control module in or on the lamp and possibly other control programs on hereby coupled devices, which is designed to the proportions of the first LED To control the order and the second LED array emitted light within an overall light spectrum of the LED arrays according to the predetermined spectrum control function.
- a control arrangement for example, as will be explained later, a control device or a control module in or on the lamp and possibly other control programs on hereby coupled devices, which is designed to the proportions of the first LED To control the order and the second LED array emitted light within an overall light spectrum of the LED arrays according to the predetermined spectrum control function.
- the control arrangement has at least one short-term dose variation interface, preferably a dose-increasing interface (hereinafter simply limiting the invention to a single key, also referred to simply as the "boost key”) and is designed such that it can be used receiving a short-term dose change signal, preferably a dose increase signal, from said short-term dose change interface at least drives said first LED array for a predefined dose change period, preferably a dose increase period, deviating from said predetermined spectrum control function is operated at a predetermined minimum power or that the proportion of light that first LED array within the total light spectrum of the LED arrays is a certain minimum proportion, and that after the predefined dose change period, the LED arrays are driven according to a predetermined control rule so that the total light spectrum again at the current time after the expiry of dose change Time span predetermined spectrum control function corresponds.
- a dose-increasing interface hereinafter simply limiting the invention to a single key, also referred to simply as the "boost key”
- the LED lamp can also have more than two LED arrays with different color temperatures or light spectra.
- the control method according to the invention can be extended accordingly, for example, by providing a separate boost mode or boost for several or even each of the LED arrays, for a limited period of time, for the power of the LED in question Deviating from a preset spectrum control curve.
- the first LED array outside the boost mode emits no light at all (ie their share of the total spectrum is zero), and the remaining total spectrum of the other LED arrays is manually or optionally according to user request according to a time-dependent spectrum - Control curve (as part of the spectrum control function) controlled.
- the first LED arrangement is also used in "normal operation" and contributes its time-varying proportion to the light spectrum of the LED luminaire in accordance with a spectrum control curve.
- the first LED arrangement is operated in boost mode with a maximum proportion of the total light spectrum.
- the first LED arrangement is operated at maximum power, ie even if it is possible to dim the LED lamp, such a dimming Setting temporarily put out of action and sent a maximum dose of light of the first LED array to temporarily reduce the release of melatonin as much as possible and thereby enhance the effect of the happiness hormone serotonin.
- the second LED arrangement is preferably switched off in boost mode or operated at least below a defined power, so that z. B. at maximum power of a first LED array with cold light at the same time only minimal warm light is emitted, eg. B. if the first LED array itself also has a spectrum share in the yellow / red area.
- the dose variation period is preferably at most about 30 minutes, more preferably at most about 20 minutes, most preferably at most about 10 minutes.
- the approximate "approx.” Is understood to mean that the dose change period includes, for example, a short rise time with a time constant in the range of seconds, preferably only a few seconds, in which the first LED array can be started up if an instantaneous change in color temperature or light temperature is not desired.
- the reset after the dose change period takes place on the total light spectrum according to a predetermined control rule.
- This basically includes
- an immediate provision can be made, ie immediately after the expiry of the time period, a conversion to the planned at this time shares in the total spectrum according to the Spectrum control curve is done.
- this control rule particularly preferably provides that, after the predefined dose change period has elapsed, the LED arrangements are controlled in such a way that the proportion of the light of the first LED arrangement in the total light spectrum exceeds a specific reset period, preferably at least 30 sec. is reduced until the total light spectrum again corresponds to the predetermined spectrum control curve. Ie. For example, slowly, with a time constant in the minute range, the power of the first LED arrangement is shut down again according to the given control rule and, if necessary, the power of the second LED arrangement is simultaneously raised again.
- the invention serves to make a short-term conversion of the total light spectrum for adaptation to unexpected changes in the situation.
- circadian spectrum control curve optimal light are delivered to the user. It then makes sense to take precautions that the user does not unconsciously override the spectrum control curve for too long a period of time by constantly switching to "boost mode.”
- this is preferably within a predetermined range Acceptance period accepted only a certain maximum number of Kurzzeitdosisver Sungssignale, in particular dose increase signals, in which then actually deviates from the predetermined control curve control of the LED arrays.
- the control device may preferably store at what time a short-term dose change signal takes place, and then the number of times in the time span will then be stored stored from the initial receipt of
- the acceptance period is preferably at least four hours, more preferably at least eight hours, and most preferably at least twelve hours.
- the maximum number of short-term dose change signals that is accepted within the acceptance period is, for example, preferably four, particularly preferably two. However, this also depends on the length of the acceptance period. In principle, it is also possible to have multiple nested acceptance periods monitor, for example, that the boost mode can not be used more than twice in four hours, but not more than four times in twelve hours.
- a graphical user interface particularly preferably a touch display
- the control curve can also be changed particularly preferably with the aid of the graphical user interface.
- a simple display of the respective current value of the spectrum control curve for example in the manner of a bar chart or the like.
- Very particular preference is given to both a simple display on an operating module, for example, directly on the lamp, and an additional optional output of the spectrum control curve on a touch display or the like.
- a spectrum control curve and / or a short-term dose change signal from a mobile terminal or a PC, preferably wireless, are transmitted to a control device of the LED light.
- the mobile terminal is thus temporarily a part of the control arrangement of the LED light, namely a kind of remote control.
- a mobile terminal here is any device to understand what the user can carry with him and which has suitable storage means and a user interface and an interface for coupling to the control device of the LED light.
- These include typical handheld devices, in particular with suitable radio interfaces or the like, such as smartphones, tablet PCs, laptops, watches, spectacles etc. with suitable functions similar to smartphones.
- the mobile terminal or the PC only have to have suitable application software (also referred to as "app” in the following), preferably wirelessly, more preferably via a short-range radio link.
- a mobile terminal with a suitable app can also be used to control multiple LED lights (even with one and the same spectrum control curve), e.g. B. when the user uses multiple workstations with such LED lights.
- a near field communication element eg an NFC tag, an RFID tag or the like
- a scan code can also be attached to the LED light.
- a mobile terminal or PC can then be on the mobile terminal or the PC when detecting the near field communication element by the terminal automatically (possibly with a user confirmation) called and executed a suitable app, as later will be explained.
- an operating module can also be mounted directly on the housing of the LED lamp or elsewhere in the room and connected to the LED lamp.
- interpolation point values are preferably specified as interpolation points at different points in time, and an interpolation function is then determined on the basis of these interpolation points as the spectrum control curve.
- an interpolation function is then determined on the basis of these interpolation points as the spectrum control curve.
- up to 24, preferably at least twelve such bases are distributed over the day.
- Each support point will then have a color temperature value and the respective time available. If, for example, as explained above, an app is used on a smartphone in order to determine or change the spectrum control curve, it is sufficient, for example, only these interpolation points to the control device, for example to the integrated in the LED lamp control module or with it firmly connected control module to convey.
- the color temperature value as well as the distance of the interpolation point to the next can be transmitted as a value pair per support point.
- the spectrum control curve could also be transmitted by the control device on the side of the LED light only in the form of a list of points to the app of the terminal, if the spectrum control curve is generated or changed in the control device.
- the current interpolation function Is z. If, for example, this interpolation function is a polynomial of the nth degree, then the associated coefficients of the polynomial can be stored in the LED luminaire-side control device in addition to the interpolation points, so that the current value of the spectral value to be set in a very simple manner Control curve can be found and adjusted. For this purpose, the LED luminaire-side control device can perform its own time measurement with its own clock in the control device.
- a change in the spectrum control curve on a graphical user interface may be particularly preferably added and / or removed and / or moving bases.
- a graphical user interface eg, a touch display
- Both the app and possibly the LED lights side control device can be set up for this purpose.
- the displacement of the support points can be particularly preferably two-dimensional, d. H. a vertex can be moved both in color temperature direction and in time direction. Adding, removing, or moving such a vertex automatically results in a new interpolation function being determined as the new spectrum control curve.
- the list of bases or at least the changed bases is again transmitted to the LED lights side controller, which then z.
- the interpolation function also recalculated and deposited new coefficients.
- the spectrum control curve is locally modified at least temporally.
- This local modification is at least partially automated in a subsequent re-run of the spectrum control curve, for example the next day. taken into account.
- This is independent of whether a base of the curve is newly generated, removed or moved or whether, for example, just the current color value manually, for example, on an operating module of the LED light, z. B. using a color controller, using a voice control on the control module or the app, etc. is changed directly by the user.
- the term "manual" is not to be understood that the user performs the re-adjustment by hand, but that the local modification of the spectrum control curve is not automatic, but targeted by the user for a specific, preferably current, time or In the end, such a change usually causes the spectrum control curve to be modified locally, unless the user makes it very clear through appropriate inputs to the user interface that he / she no longer Control curve, but instead wants to set manually a color temperature value fixed.
- Such automatic consideration of a local modification in the subsequent passage of the spectrum control curve, for example, by this local modification is suitably stored, for. B. by changing the base list, causes the control with the spectrum control curve is in some way adaptive. For example, each time (manually) the light color is changed by the user during the control with a spectrum control curve, the reuse of the spectrum control curve may deposit a change in the spectrum control curve such that the manually adjusted variation of the Color spectrum, for example, about 30% (or another share) is taken over. If the user carried out the same modification three times in a row at about the same time, the spectrum control curve would be changed to about 30% on the third day if the changes were accepted, so that the user no longer has to make any further changes.
- the overall system has learned that the user desires a different color spectrum at a particular time of day than originally provided by the spectrum control curve. It is also possible to consider not only "normal" manual light color changes by the user, but also the setting of the Boost mode, ie if the user is in Boost mode at the same time for several days in a row. to turn on the blue light component increase, the spectrum control curve is automatically changed in such a way that more blue light is made available to the user at this time, even if Conditionally at the time such a high level of blue light is set automatically as in boost mode.
- an initialization procedure or parameterization procedure eg during the initialization procedure
- user-specific parameters via a user interface and based on these user-specific parameters then a user-specific individual start spectrum control curve is determined.
- the "user-specific” parameters include, for example, the "user-behavior-specific” parameters, such as, for example, For example, when a user usually has to perform or perform which activities, for example, when his work begins, when work ends, when he makes a lunch break, etc.
- “user-feeling" specific parameters such as when the user considers the highest would be ready to perform if it were free to choose, but not “user-specific” parameters, in contrast, lamp turn-on and turn-off times or specific color temperature values at specific times.
- the control arrangement of the LED luminaire moreover preferably has at least one dimmer interface and is designed such that the total amount of light of the LED arrangements, that is, via the dimmer interface, is provided by means of a suitable dimming signal.
- the brightness or total power of the LED light is adjustable, preferably independent of the color temperature.
- This dimmer interface can be arranged, for example, on an LED luminaire-side operating module and / or in an app of a mobile terminal.
- the LED lamp and / or the mobile terminal may be equipped with a brightness sensor, via which the brightness of the LED assemblies is controlled ambient light-dependent. In this case, already existing in the terminal sensors, e.g. a camera to be used with.
- the use of a motion or presence sensor is possible, via which the brightness is regulated as a function of a user presence.
- the controller may also be set up such that, in the normal course according to the spectrum control curve, a maximum of (total) 80% power is output, which is distributed among the LED arrays. This is particularly advantageous in a boost mode, when it comes to the user to get as much blue light as possible in the short term in order to lower the melatonin output.
- Such a control of the light color according to a predetermined spectrum control function, in particular spectrum control curve, with fixed dimming value is preferably carried out by means of a method and a correspondingly formed control arrangement, wherein at least the first LED array and the second LED array with a certain current ratio can be controlled.
- the first LED arrangement and the second LED arrangement are particularly preferably controlled in a pulse width modulation method (PWM method).
- PWM method pulse width modulation method
- the power or brightness of the individual LED arrangements is controlled with this PWM method.
- the LED arrangements, z. B. via at least one switching current regulator or constant current regulator of the control arrangement, with a common total current, in particular a constant current, are operated, and this total current is switched over in time different phases to the various LED arrangements.
- the power given by the total current which is ultimately determined by the dimming value, is divided among the given LED arrays.
- a parallel operation of the two LED arrangements occurs, unless that is not the case anyway, due to the reduced total power between switching over for a longer period of time, no energization of the LED arrangements should take place within the PWM method. How later will be explained with reference to the figure description, this is relatively easy to implement by a signal delay.
- the power then temporarily splits to both LED arrays, that is, one LED array shuts down power while simultaneously increasing the power of the other LED array.
- This control method largely avoids flicker, increases electromagnetic immunity and reduces electromagnetic emissions. Therefore, this procedure also makes sense in PWM methods for controlling a plurality of LED arrangements if the boost mode according to the invention is not available.
- FIG. 1 shows a side view of an exemplary embodiment of an LED luminaire according to the invention
- Figure 2 is a simplified block diagram of an embodiment of a
- Control arrangement for an LED luminaire comprising an LED luminaire-side control device and a mobile terminal coupled thereto,
- FIG. 3 shows a circuit diagram for an exemplary embodiment of a control device of the LED luminaire
- FIG. 4 shows a pulse diagram for the PWM control signals of two LED arrangements and for the overall PWM current signal of the LED arrangements according to a first exemplary embodiment
- FIG. 5 shows a pulse diagram for the PWM control signals of two LED arrangements and for the overall PWM current signal of the LED arrangements according to a second exemplary embodiment
- FIG. 6 shows a schematic representation of an example of a graphical user interface for setting a spectrum control curve
- FIG. 7 shows a representation of the spectrum control curve according to FIG. 6 after or during a change of interpolation points
- FIG. 8 shows a representation of an example of a spectrum control curve and its temporary change upon receipt of a short-term dose variation signal according to the invention.
- FIG. 9 shows a schematic illustration of an example of a graphical user interface for the further setting of parameters of an LED lamp, FIG.
- Figure 10 is a flow chart illustrating the initialization of the control by determining an individual user-specific spectrum control curve.
- a table lamp 100 which can preferably be used as desk lamp 100.
- the table lamp 100 comprises a luminous head 50.
- the luminous head 50 has a light module 51 with a plurality of LED arrangements for generating light, in this case specifically two LED arrangements 1, 2 each having an LED pair with two individual LEDs (as shown in FIG ).
- One LED array 1 contains LEDs which emit cold white light with a strong maximum in the blue region around 400 nm.
- these can be LEDs XLamp XM-L KW-U2 from Cree.
- the other LED array 2 contains LEDs which emit more warm white light with a strong maximum in the yellow-red area around 600 nm.
- these can be LEDs XLamp XM-L2 WW-T3 from Cree.
- the LED arrays are soldered in the light module 51 to an LED board, for example a metal core board (not shown).
- the light fixture 100 has a control module 41 which is located in a lower region of the light arm is housed and connected via lines to the light module 51. Part of this control module 41 is also an operating module 10.
- the operating mode dul 10 can be manually operated by a user by touching a control surface.
- the lighting module 51 also comprises a reflector arrangement which ensures that the light is emitted at a specific emission angle, as well as a diffuser arrangement, for example in the form of a simple frosted glass pane or the like, which differs from the various LEDs of FIG LED assemblies 1, 2 scattered light scattered and mixed so well that a thus illuminated surface is evenly illuminated.
- the lighting module 51 also has suitable means, such as cooling fins or the like, to provide for dissipation of the excess heat.
- LED lamp 100 is a relatively simple embodiment with only one light head 50 and a light module 51st
- the LED lamp 100 could also have a plurality of light heads or lighting modules, for example, as a floor lamp a double head in different directions down.
- the emission direction from the light head goes upwards, so that the lamp acts as a ceiling washer or to the side as a wallwasher.
- lamps with light heads that can emit light in two different directions, optionally, or at the same time, for example with two light modules with their own LED arrangements, one light module down and the other lights up as the ceiling and the lighting modules independently or in Combination can be operated.
- FIG. 2 shows a control arrangement 40 for an LED lamp 100.
- the two LED arrangements 1, 2 are shown only symbolically with an LED. It may, as explained here but also act on several LEDs, such. B. explained to Figure 1.
- the control arrangement 40 comprises a control device 41 arranged on the side of the LED light 100, for example here in the form of the control module 41, which is arranged in the lower part of the arm of the LED light 100 (see FIG. 1).
- This control module 41 includes, as already mentioned, an operating module 10 with a plurality of operating elements 1 1, 15, 18, here preferably in the form of capacitive acting on touch "keys".
- the one interface 43 is a plug interface 43, for example a USB interface 43, for connecting the mobile terminal or a USB memory or the like to the control module 51 and / or as a charging interface for charging a mobile terminal.
- the other interface 42 is a wireless interface 42, preferably in the short-range radio range, in this case specifically a preferred Bluetooth interface 42.
- a mobile terminal 60 with a graphical user interface 61, preferably a smartphone, can also be used via this wireless interface 42.
- a clock with appropriate function o- the like are coupled to the LED light 100.
- an app that provides a control functionality for the LED lamp 100 is implemented. For example, a spectrum control curve can be determined hereby, and values for this spectrum control curve can be transmitted to the control module 41 for controlling the LED arrangements 1, 2.
- Another module of the control module 41 is a microcontroller 20, which controls an LED current control 30 of the control module 41, via which the LED arrangements 1, 2 in turn are activated or energized in a pulse width modulation method.
- the LED current controller 30 may include a total current control device 31 for both LED arrays 1, 2, and a current selection device 32, e.g. H. which proportion of the total current which of the LED arrangements 1, 2 is made available. Via a current switch 33, the total current is then divided according to phases. A detailed construction of how such an LED current control 30 can be realized will be explained in more detail with reference to FIGS. 3 to 5.
- the total current and the proportion of the total current for the individual LED arrangements 1, 2, is ultimately determined by the microcontroller 20, which drives the LED current control 30.
- the microcontroller 20 is given a spectrum control function STK, here in the form of a time-dependent, in particular circadian, spectrum control curve STK, according to which the color temperature is automatically changed to suit the daily course of the user.
- the spectral control function can also specify a constant value to the microcontroller (ie a time-constant function), the value remaining valid until the user returns via a key for adjusting the color temperature, for example, with a specific color temperature controller 1 1 on the control module 10 or a corresponding virtual setting controller on the graphical user interface 61 of the mobile terminal 60 app, sets a new value. This depends on which function the user has set.
- the dimming d. H. Adjusting the brightness or the total power (ultimately here the total current), the LED assemblies 1, 2 via a suitable dimming button assembly 18 (here symbolized by only a dimmer button) on the control module 10 or a corresponding functionality on the Mobile Terminal 60.
- This overall brightness setting is independent of the color temperature setting (except in Boost mode, if applicable).
- FIG. 2 shows only in simplified form the components essential for the invention and that the entire control arrangement 40 may also include further components, for example further mobile terminals or PCs coupled via the interfaces.
- the control device 41 may also have other components and assemblies, such as one or more power supplies, voltage converters, optionally additional storage units, interfaces, other processors, display elements, etc.
- FIG 3 shows in more detail a circuit diagram with which such a control of the LED assemblies 1, 2 can be realized, in which case only the microcontroller 20 is shown with the current control circuit.
- the microcontroller 20 each have a PWM current signal I G P for the LED total current (hereinafter PWM total current signal called) and a PWM current signal l W p for one of the two LED arrays 1, 2 , here the warm white second LED array 2, produced.
- the PWM current signals are each logical control signals (with "0" or "1") to control the current.
- the PWM current signal l W p for the second LED array 2 is supplied to an XOR gate 36 (exclusive OR gate) as well as the PWM total current signal I G p.
- the result is then a PWM current signal I K p for the first LED array 1 with the cool white LEDs.
- This PWM current signal I K p is applied to a switching input of a first transistor T1, here a MOSFET.
- a second transistor T2, here also a MOSFET, for the second warm-white LED array 2 is driven at its switching input by the PWM current signal I W p for the second LED array 2.
- the switching inputs of the transistors T1, T2 are (forming the current switch 33, together here) thereto K p, IWP, and via resistors R2, R3, respectively connected to the signal lines of the respective PWM current signals I with a reference potential VR, for example, 5V. With the aid of the transistors T1, T2, only the total current is split between the two LED arrangements 1, 2.
- the total current of the LED array and thus the brightness of the light module is, as mentioned, ultimately determined by the PWM total current signal l G p, which is first supplied by the microcontroller 20 to a logical AND gate 35, in addition, a logical release signal PWM E. is supplied to an inverted input.
- the enable signal PWM E is output by the microcontroller 20 so that only the logical PWM total current signal l G p is output at the output of the AND gate 35 accordingly when the microcontroller has been safely started up in a defined state.
- a current controller 34 here a step-down regulator module 34, for example, type LM3406 supplied with which the total current predetermined by the PWM total current signal I g p can be regulated by the LED arrangements 1, 2.
- a free-wheeling diode D 1 to ground and an inductance L 1 are conventionally provided at the output of the step-down regulator module 32 between the output of the step-down regulator module 34 and the anode terminals of the LED arrays 1, 2, which are connected in parallel.
- two freewheeling diodes D2, D3 are additionally connected in order to avoid voltage peaks at the LEDs.
- the LED arrays 1, 2 are connected to the aforementioned transistors T1, T2.
- the transistors T1, T2 are each connected to ground via a common resistor R4. This resistor R4 is used for total current measurement. The current value determined there is supplied as an actual value to the step-down regulator module 34 (not shown in FIG. 3).
- the PWM current signal l W p is not conducted for the second LED array 2 immediately to the transistor T2, but via a circuit arrangement consisting of a diode D4, one connected in parallel with resistor R1 , a subsequent Schmitt trigger 37 and one between the diode D4 and the resistor R1 on the one hand and the Schmitt trigger 37 on the other hand connected to ground capacitor C1.
- a circuit arrangement consisting of a diode D4, one connected in parallel with resistor R1 , a subsequent Schmitt trigger 37 and one between the diode D4 and the resistor R1 on the one hand and the Schmitt trigger 37 on the other hand connected to ground capacitor C1.
- FIG. 1 A pulse diagram of the PWM current signals l G p, IWP. IKP in this circuit arrangement is shown in FIG.
- the upper pulse diagram shows the PWM total current signal IGP output by the microcontroller and the middle pulse diagram shows the PWM current signal IWP for the warm white second LED arrangement 2.
- the lower pulse diagram shows the PWM current signal I K p generated therefrom by the logic module 36 the cool white, first LED array 1. Shown is the switching state over time.
- a PWM current control signal for the current of the cold white and the warm white LED arrays can also be generated directly by the microcontroller. It can be ensured that the current of the warm white LED array 2 can be turned off only after the power for the cool white LED array 1 is turned on and the total current has split on both branches.
- a PWM current signal l G p for the common total LED current can be generated via a logical OR connection (which can be generated, for example, simply with two diodes and one resistor), which then can be used. can be given to the dimming input of the LED current controller (ie the step-down regulator).
- the LED current can again be switched over transistors to the cool white and warm white LED arrangement 1, 2.
- FIG. 1 A corresponding diagram of these PWM current signals I G p, IWP, IKP is shown alternatively in FIG.
- the upper diagram shows the output from the microcontroller PWM current signal l W p for the warm white LED array 2, the middle diagram also issued by the microcontroller PWM current signal l K p for the cool white LED assembly 1 and the lower diagram of the the two upper curves via an OR operation generated PWM total current signal l G p, which is given to the dimming input of the controller.
- a circadian time-dependent spectrum control curve STK for the microcontroller 20 can be generated with the aid of a graphical user interface 61, for example by means of an app on a mobile terminal 60 as the spectrum control function STK.
- the total light spectrum or the overall color temperature of the light emitted by the light-emitting module 51 of the LED light 100 is determined over the course of the day.
- the current spectrum control curve STK is displayed over time on the touch display of the terminal 60. Plotted here in the spectrum control curve STK in each case the color temperature of the total light of the controlled lighting module 51 of the LED lamp 100 over time.
- the display is also rotated in the usual way, so that the time axis is always down.
- the time scale is shown below. The color temperature increases from bottom to top. It starts down at about 2700 K (warm white light) and goes up to about 6500 K (cool white light).
- the zoom can be zoomed in or out using zoom buttons 62.
- zooming with the usual gestures on the touch screen is possible (for example, pulling apart the fingers or pushing the fingers together).
- shift keys 63 are also shown here if different LED lights or different independent light modules with their own independent spectrum control curves are to be controlled with the app.
- a button 64, the current window or the app can be closed. It will be in this context It should be noted that the term "key" is to be understood to be virtual keys, so that when the screen is touched at this point, the respective function is triggered.
- the spectrum control curve STK is defined by multiple vertices SP1, SP2, ... SP6.
- an accurate color temperature value eg the mean value or the maximum of the total light spectrum
- These interpolation points SP1, SP2,... SP6 either become as later will be explained, initially set for a start-spectrum control curve. However, they can also be individually predetermined or changed by the user, as will be explained with reference to FIG. In Figure 6, only six such bases are shown. It can also be used more bases to define a curve, for example, twelve or twenty-four points distributed over the day.
- the spectrum control curve STK is then placed as, possibly in sections, interpolation function, for example as a spline, through these interpolation points.
- the first interpolation point SP1 here is at the same time a interpolation point, with which it is specified that the illumination module 51 is switched on at this point in time. This is in the example shown in FIG. 6 at 9 o'clock in the morning.
- the last interpolation point is accordingly also a point in time at which the light-emitting module 51 is switched off again. This is the time at 19:30.
- the user can also change the spectrum control curve STK by changing the support points SP1, SP2,... SP6.
- Shown here is the original spectrum control curve STK as in FIG. 6 and a new spectrum control curve STK 'generated by the displacement of the support points SP2, SP3 and SP4 and removal of the fifth support point SP5.
- the fulcrums SP1, SP2, ... SP6 can be shifted in two directions, namely, only in the color temperature direction, ie, perpendicular to the time axis, as in the fulcrums SP2, SP4.
- a shift along the time axis is possible, as is the case with the third interpolation point SP3.
- the touchscreen When touching the fulcrum (preferably, the touchscreen reacts so that the user touches the curve just below the fulcrum to not obscure the fulcrum itself), an enlarged fulcrum below it is shown where the user uses his finger to Good base can lead.
- the current color temperature value can be displayed, as here 3200 K (thus still in the warm white area) at the base SP3.
- the change of the spectrum control curve STK i. H. the displacement of the points SP1, SP2, ... SP6, registered and stored. This can be done both in the app, i. in the memory of the mobile terminal, as well as in the microcontroller 20 or in the associated memory 21 of the microcontroller 20 in the control module 41 (see Figure 2) of the LED light itself done.
- the spectrum control curve is run through again, for example the next day, the change in the curve introduced by the user on the previous day can be taken into account, but preferably only by a reduced part, for example by 30%. If the user makes the same or similar change three days in a row, this results in a changed curve in the desired form.
- the user can of course also set a mode in which the changes are adopted immediately as a fix and not just as a change made individually for that day, which is then possibly taken into account in the learning mode.
- Figure 8 shows an example of how the color temperature CT is temporarily changed when the boost mode is turned on, d. H. when the user actuates a boost key to transmit a short-term dose change signal DHS, here a dose increase signal (DHS).
- DHS dose increase signal
- a change to increase the proportion of warm light for a temporary relaxation phase could also take place.
- the color temperature CT as a proportion of the cold white light kw (ie, light of the first LED array 1) or warm white light ww (that is, light of the first LED array 1) is indicated in% on the vertical axis.
- a boost button 15 is located, for example, on the operating module 10 of the LED lamp 100 (see FIGS. 1 and 2).
- a corresponding virtual key may also be provided by the app on the graphical user interface 61 of the portable terminal 60. Without pressing such a boost button, control of the color temperature of the LED lighting module 51 would normally occur according to the spectrum control curve shown in FIG. 8, which in turn is defined by fulcrums SP1, SP2, ... SP4 over time t. However, at any time t B , the user decides that he needs refreshing with respect to the light.
- the cool white LED array 1 After pressing the boost button at a relatively short rise time At r of preferably about one Second, to ensure that the cool white LED array 1 is ramped up to the maximum power, ie at 100% power (whereas in normal operating mode, for example, the total power is at most 80% of the possible power). In other words, 100% of the available power is spent to operate the first LED array 1.
- the warm white LED array 2 is not powered at all during this time.
- the color temperature CT is 100% kw. This results in a maximum blue component (in the region around 450 nm) being emitted, which reduces the user's melatonin output in the short term and thus increases the effect of the rather refreshing happiness hormone serotonin.
- the LED light or the light module is preferably constructed so that the illuminance is then at least 80 lux, but more preferably higher, for example, about 200 Ix.
- this increase in performance of the cool white LEDs and color shift to the maximum blue fraction occurs only for a limited boost time AtB of, for example, 10 minutes.
- the power of the cool white LED array 1 and the power of the warm white LED Arrangement 2 again adjusted so that the total light spectrum reaches the color temperature value of the control curve STK at the time then present.
- the LED lighting module 51 is then operated again normally according to the spectrum control curve STK.
- the spectrum control curve STK is not affected thereby.
- the activation of the boost mode is stored at this time and this similarly enters into a long-term change in the control curve over several days, if the user, for several days in a row, at approximately the same time the boost Button pressed, as this indicates that the spectrum control curve is not optimally set for the user and he generally needs a little more blue light at this time of day.
- Boost button By pressing the boost button at time t B also a watch counter is triggered, which runs along at least one acceptance period AZ long. While this counter is running, the number of times the user presses the boost key is counted, and it is stored in the microcontroller that within the acceptance period AZ a certain number of boost periods At B may be present, for example that the user is within four Hours only twice can use the boost mode. switches if the user enters Boost mode a third time within four hours, it will have no effect.
- Figure 9 shows, this time in upright representation, another user interface (another window or menu) of the app for controlling the LED light on a mobile device 60.
- another user interface another window or menu
- the app for controlling the LED light on a mobile device 60.
- STK control curve
- this toolbar may be invoked by the user, with the app turned on and the spectral control curve displayed, fingering the finger over the screen from the edge, around the toolbar to "pull out" the page margin.
- This toolbar contains on the one hand a menu button 69, with which a main menu and including other functions (or windows) can be turned on, for example, a window for calling an initialization mode to first create a customized as well as individual start spectrum control curve for the user .
- the toolbar also includes a boost button 65 for triggering the previously discussed boost mode.
- an on / off button 66 is provided here.
- a further key 67 can be set whether the control curve STK is actually adjusted during a shift of the currently visible point on the control curve control curve or whether this should only be a short-term customization of the control curve for that one day.
- Via a virtual dimming key 68 a virtual dimming controller 70 is opened. On this a virtual point 71 can be moved so as to vary the brightness of the LED lighting module, in parallel with the possibility of using a corresponding dimmer control in the operating module 10 to the LED light 100.
- the said app can be downloaded to the mobile terminal 60 in the usual way, for example from the Internet.
- it is also possible to couple the terminal 60 via the wireless interface with the LED lamp 100 for example, by a search mode is set in the usual way and at the same time on the LED light, a search mode is set and a find the devices can then still be given a confirmation signal in the app and / or the operating module of the LED light to complete the coupling.
- a coupling by means of a Nahfeldkommunikations interface or reading a scan code to the LED light conceivable.
- the LED light module is turned off or dimmed to a minimum and automatically resumes the connection and a booting of the LED light module, as soon as the Terminal is again in the reception area etc.
- FIG. 10 shows a flow chart of how an individual start spectrum control curve S-STK can be generated for a user for the first time using an LED light by this user.
- the user is offered by the app after the coupling or selection or confirmation of the coupling with the LED light to perform an initialization mode. If this is accepted by the user, various user-specific parameters P1, P2,... Are queried within a first initialization step I. In this case, there is no query at what times exactly which interpolation points are set with which values, but instead user-behavior-specific parameters are interrogated, such as the time of the start of work, the time of the end of work, the time and duration of the pauses.
- the start spectrum control curve S-STK is then calculated in a subsequent curve determination step II.
- the start spectrum control curve S-STK could be selected so that the beginning of the curve is 30 minutes before the start of work and the curve has a 60% cold white content.
- the end of the curve can be 30 minutes after the end of work, with a 0% cold white portion.
- One hour before the end of work could be a base, which still contains 20% cold white. Around the breaks around more bases are laid. For example, a base could be set 30 minutes before lunch with 40% cold whiteness, and during the lunch break the cold whiteness is then set to 20% and at the end of the lunch break and 30 minutes after lunch break, two bases with 80% cold white Share set.
- bases with 70% cold whiteness could be chosen for all times in the period of the selected highest motivation, which are not affected by breaks or end of work, whereby the one hour of the most high willingness to perform a 90% Cold white portion receives.
- the interpolation points which are set on the basis of the freely selectable highest willingness to perform, are set in such a way that they do not influence the pauses or the end of work selected by the external specifications.
- This start spectrum control curve S-STK can then be transmitted from the mobile terminal 60 via the wireless interface to the control module or the microcontroller 20 in the control module 41 of the LED light 100. It is sufficient if the list of bases is transmitted.
- the microcontroller and the app can calculate the same interpolation function as the spectrum control curve.
- the microcontroller can store the coefficients of an nth order polynomial for the interpolation function. By simple multiplication processes, the microcontroller 20 can then quickly calculate the appropriate value of the curve at any time and output corresponding PWM current control signals, as has already been explained with reference to FIGS. 1 to 5.
- the new interpolation points are transmitted via the wireless interface to the microcontroller of the control module of the LED lamp, which then also calculates the new coefficients and deposited.
- the user can also at any time switch off a use of the spectrum control curve and proceed to keep the spectrum control function constant for the next period of time and, for. B. via a simple slider to set the color temperature, in which case the microcontroller holds this constant value. Also in this case, it is possible to select the boost function and then return to the predetermined constant value according to the spectrum control function.
- the LED light not only has two LED arrays with different light spectra but optionally also more than two different LED arrays with different light colors or spectra, in particular any colored LEDs, for example - but not exhaustive - amber, blue, red, yellow-red and / or green LEDs. It could also z. B. one or more additional LED arrangements may be provided, which are switched on only in boost mode to the first LED Reinforce arrangement in their effect.
- the various LED arrangements can also be distributed thereon, ie they are located in different light heads or lighting modules.
- these z. B. each have multiple LED arrays and / or independently controlled by the inventive method, are also operated independently with different spectrum control functions (for example, with different circadian variations) and also with separately triggered trigger modes.
- the special features of the variants described above can also be combined with each other.
- the use of the indefinite article "on” or “one” does not exclude that the characteristics in question may also be present multiple times.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
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DE102014115076.7A DE102014115076A1 (de) | 2014-10-16 | 2014-10-16 | Verfahren zur Ansteuerung einer LED-Leuchte und LED-Leuchte |
PCT/EP2015/072854 WO2016058849A1 (de) | 2014-10-16 | 2015-10-02 | Verfahren zur ansteuerung einer led-leuchte und led-leuchte |
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DE102015105479A1 (de) | 2015-04-10 | 2016-10-13 | "Durable" Hunke & Jochheim Gmbh & Co. Kommanditgesellschaft | Standleuchte |
DE102016104452A1 (de) | 2016-03-11 | 2017-09-14 | "Durable" Hunke & Jochheim Gmbh & Co. Kommanditgesellschaft | Regelung einer LED-Anordnung und LED-Beleuchtungssystem |
US10085314B1 (en) | 2018-03-14 | 2018-09-25 | Infineon Technologies Ag | Light emitting diode driver for load changes |
DE102018106089A1 (de) * | 2018-03-15 | 2019-09-19 | Ledvance Gmbh | Beleuchtungssystem zur dynamischen Beleuchtungssteuerung |
DE102018115132A1 (de) * | 2018-06-22 | 2019-12-24 | Vossloh-Schwabe Lighting Solutions GmbH & Co. KG | Beleuchtungssystem für die Tier- und Pflanzenhaltung |
DE102021103698A1 (de) * | 2021-02-17 | 2022-08-18 | Ledvance Gmbh | Leuchtvorrichtung zum Erzeugen eines weißen Mischlichts mit steuerbaren Spektraleigenschaften |
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WO2013111134A1 (en) * | 2012-01-24 | 2013-08-01 | Yechezkal Evan Spero | Detector controlled illuminating system |
RU2468838C2 (ru) * | 2007-03-09 | 2012-12-10 | Конинклейке Филипс Электроникс Н.В. | Осветительная система для энергетической стимуляции |
CN101910716A (zh) * | 2008-01-17 | 2010-12-08 | 皇家飞利浦电子股份有限公司 | 照明装置 |
US20130307419A1 (en) * | 2012-05-18 | 2013-11-21 | Dmitri Simonian | Lighting system with sensor feedback |
DE102009040283A1 (de) * | 2009-09-04 | 2011-03-10 | Tridonic Ag | Betrieb von pulsmodulierten LEDs |
CA3030271C (en) * | 2009-10-08 | 2021-08-17 | Delos Living, Llc | Led lighting system |
US8912734B2 (en) * | 2011-03-24 | 2014-12-16 | Cirrus Logic, Inc. | Color mixing of electronic light sources with correlation between phase-cut dimmer angle and predetermined black body radiation function |
US9967940B2 (en) * | 2011-05-05 | 2018-05-08 | Integrated Illumination Systems, Inc. | Systems and methods for active thermal management |
JP5649537B2 (ja) * | 2011-08-12 | 2015-01-07 | 株式会社東芝 | 照明装置 |
JP2014102978A (ja) * | 2012-11-20 | 2014-06-05 | Toshiba Corp | 照明装置 |
PL2934089T3 (pl) * | 2012-12-21 | 2017-08-31 | Philips Lighting Holding B.V. | Ogrodniczy interfejs oświetleniowy do łączenia co najmniej jednego systemu oświetleniowego |
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