EP3053409A2 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage

Info

Publication number
EP3053409A2
EP3053409A2 EP14780448.8A EP14780448A EP3053409A2 EP 3053409 A2 EP3053409 A2 EP 3053409A2 EP 14780448 A EP14780448 A EP 14780448A EP 3053409 A2 EP3053409 A2 EP 3053409A2
Authority
EP
European Patent Office
Prior art keywords
code
code words
color
lighting device
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
Application number
EP14780448.8A
Other languages
German (de)
English (en)
Other versions
EP3053409B1 (fr
Inventor
Bernd Burchard
Christian Schmitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elmos Semiconductor SE
Original Assignee
Elmos Semiconductor SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Elmos Semiconductor SE filed Critical Elmos Semiconductor SE
Priority to EP14780448.8A priority Critical patent/EP3053409B1/fr
Publication of EP3053409A2 publication Critical patent/EP3053409A2/fr
Application granted granted Critical
Publication of EP3053409B1 publication Critical patent/EP3053409B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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
    • H05B45/32—Pulse-control circuits

Definitions

  • the invention relates to a lighting device and more particularly to a device for setting multi-colored light scenes in a motor vehicle.
  • the PWM modulation has some disadvantages, in particular with regard to EMC aspects, which will be described in detail below.
  • Pulse Width Modulation respectively Pulse Length Modulation (see also "Karsten Block, Peter Busch, Ludger Erwig, Franz Fischer, Wilken Pape, Manfred White Gerber: Electrical Occupations, Learning Fields 9-13, Energy and Building Technology, 1st Edition, ceremoniessverlag EINS, Troisdorf 2006 ISBN 978-3-427-44464-0.
  • PWM Pulse Width Modulation
  • PWM Pulse Width Modulation
  • PDM Pulse Width Modulation
  • lighting devices which comprise a plurality of light emitters in at least two different colors, which are designed to be coupled to a circuit having a current source and a common potential reference and driver (TRI, TR2, TR3 , DRV) for operating the plurality of light emitters, of which at least two are connected to the plurality of light emitters and the circuit and comprise the respective current paths of the at least two differently colored light emitters corresponding switches.
  • said prior art lighting device includes control for periodically and independently opening and closing at least two switches.
  • the controller has an externally assigned, variable bus address to identify the address portion of an input ⁇ data flow and respond to it, the mannan- part, in particular an addressed data packet, this control is assigned.
  • this prior art lighting device is characterized in that each light emitter is an LED and the controller generates a plurality of PWM signals, wherein each PWM signal is associated with one of the plurality of LEDs of different colors and each of the PWMs Signals causes a corresponding one of the at least two switches to open and close at corresponding frequencies according to the respective operating cycles, and wherein the data flow component contains data for Mood of the respective working cycles of at least two differently colored LEDs comprises (see, for example, EP-B-1 016062).
  • Fig. 1 shows an exemplary spectrum for a bipolar PWM according to the prior art.
  • the invention solves the problem of providing a device for supplying light emitters and / or LEDs with electrical energy, wherein an interference spectrum with reduced amplitude and in contrast to the prior art within certain limits modelable interference spectrum arise.
  • a subtask given later in the description is to provide a pseudo-random signal with a fill factor that deviates from 50%.
  • the invention proposes a lighting device which is provided with a first group of bulbs for emitting light of a first color, wherein the first group comprises at least one light source, at least a second group of bulbs for emitting light of a second different from the first color Color, the second
  • Group comprises at least one lamp
  • a first driver unit for driving the first group of lamps
  • a second driver unit for driving the second group of lamps
  • a drive unit for jointly and / or independently actuating the first and the second drive unit by means of drive signals
  • each drive signal of the drive unit is an n-bit-representing drive signal of a multi-bit code, with n> 1, wherein the multi-bit code comprises a plurality of binary codewords which are subdivided into at least two code classes of codewords having different numbers of one-bits,
  • At least one code class has codewords with the same number of one bits
  • code classes are associated with different intensities with which the bulbs emit light
  • the drive unit when the intensity with which the respective light emitting device emits light should remain unchanged and the intensity is assigned a code class with a plurality of codewords, successively drive signals with different codewords from the group of codewords of the intensity associated code class sends.
  • the lighting means are driven by means of a drive signal which is modulated by means of binary code words, which can also be referred to as pulse density modulation or as spread spectrum pulse density modulation.
  • codewords of the code can be subdivided into several code classes, sorted according to the number of their one-bit bits. Each code class represents a specific energy / power used by a consumer.
  • a subset of code words is selected from the number of code words of a code class, and that the code words of this subset are used to form the drive signal, the subset being at least two and less than the number of code words of the relevant one Code class includes.
  • the (interfering) spectrum potentially starting from the activation of a device according to the invention can be specifically influenced by frequency response and position.
  • the selection of the code words from a code class which are represented by the drive signals of the drive unit is randomly controlled, quasi randomly controlled, arbitrarily varying or deterministically varying.
  • the drive signals only from such code classes which comprise a plurality of codewords represent codewords having a relation to the number n of the bits of the multi-bit code percentage of one-bit, between a predetermined lower and a predetermined upper limit and / or within one or more predetermined ranges.
  • code classes which comprise a plurality of codewords represent codewords having a relation to the number n of the bits of the multi-bit code percentage of one-bit, between a predetermined lower and a predetermined upper limit and / or within one or more predetermined ranges.
  • the or one of the predetermined ranges is between 30% and 70%, in particular between 45% and 55%.
  • the lighting device according to the invention may, if desired, further comprise a data bus coupled to the drive unit for receiving data signals via the data bus which enable the drive unit to drive the drive units with the drive signals required to generate a desired mix color light ,
  • At least one code table le exists are stored in the code words of the code classes or previously selected code classes.
  • the at least two control signals do not correlate with one another and / or only after a predeterminable number of cycles, eg. B. only after 256, 512, 1024, 2048 or 4096 clocks for one or a few bars correlate with each other.
  • This measure serves to suppress the formation and / or the effects of disturbances.
  • correlation is meant here that the auto or the cross-correlation function assumes a value above a predetermined threshold for given intervals.
  • the inventive lighting device may further comprise a color table le, in which for each Grup ppe of lamps nd ie the desired color of the light to be emitted by the lamps associated code classes are given.
  • the erfind ungsdorfe Be ⁇ leuchtungsvorraum comprises a color sensor for detecting the color of the n emitted by the illuminant light for Controlstores color urch d t he drive unit.
  • the drive unit regulates the color temperature of the lighting means on the basis of a setpoint and an actual color temperature value by the maximum current and / or the maximum voltage and / or the maximum energy of the respective drive signal is regulated.
  • the background of this measure is that a consumer can react differently when activated by the signals generated according to the invention using code words from the same code class. This is because the location of the one-bits of the codewords of the same code class is different. So z. For example, the one-bit bits individually, ie separated from each other by zero bits, or in groups with different numbers of directly "contiguous" one-bit successive sequences.
  • this effect is corrected by a variable value (represented by a one-bit of the code) for the voltage, current or power to be supplied to the load.
  • a variable value represented by a one-bit of the code
  • the above cognition can also be used to exclude those code words of a code class for a control whose one-bit patterns are less advantageous for the operation of a consumer than other one-bit patterns of this code class ,
  • the clock frequency of the drive signals with which the code words are transmitted monotonically or bandwidth-limited with a lower limit frequency not equal to zero and an upper limit frequency and thus variable at is.
  • each drive signal representing a codeword has a partial spectrum in the frequency domain and thus corresponds to a partial spectrum of each codeword of each code class and that those codewords whose partial spectra lie within a predeterminable total spectrum are potentially used for the formation of the drive signal become.
  • the target specification that the (interference) spectrum should have a certain position and size is to be observed particularly advantageously.
  • the invention further relates to a lighting arrangement with
  • a central control unit which is coupled via a data bus to the control units of the lighting devices,
  • the invention solves the problem of uncontrolled EMC emissions through the use of random bit sequences or pseudo random bit sequences.
  • Such random sequences and pseudorandom sequences have the property that approximately 50% of the bits are 1 and approximately 50% of the bits are 0.
  • a true random sequence is white noise. If such a sequence were used directly for controlling the light sources, in particular LEDs, their luminous intensity would also rush in frequency ranges that are perceived by the human eye. This is not wanted. It is therefore important that the random sequence is band limited. In particular, it is important that the amplitude of the control signal below a lower limit frequency o u in the ideal case is zero or negligible for the application.
  • T C is the clock period for the shift.
  • the feedback is done by a simple primitive polynomial. Reference should be made to the European application EP2631674A1.
  • the reciprocal of the maximum period T P is the lower limit frequency. It should be noted, however, that such a pseudo-random sequence always has a mean expected value of about 50% for a 1 and thus is not suitable for amplitude control.
  • a device consists of a plurality of lighting means (106, 107, 108, R, G, B), which are connected via supply lines (102, 103, 104) each having a driver (TRI, TR2, TR3, DRV).
  • a controller regulates the power and / or the current and / or the voltage which the respective driver (TRI, TR2, TR3, DRV) supplies to the lighting means (106, 107, 108, R, G, B).
  • TRI, TR2, TR3, DRV the respective driver
  • a channel (CHN) generates a signal (102, 103, 104) corresponding to a predetermined code, the active code, and the method described below.
  • This active code in the said example, a 4-bit code
  • CTAB can ever be ⁇ wells stored in a memory for the exemplary 16 codes that result from said exemplary 4 bits.
  • Such an exemplary code table (CTAB) is given below for the exemplary 4-bit code.
  • the fill factor is the number of 1-bits in a code (in bits) divided by the length of the code (also expressed in bits) as a percentage. The maximum fill factor is therefore 100%.
  • a numerical value of 0 of said exemplary 4-control bits is to correspond to a power output of 0% and a fill factor of 0%.
  • a numerical value of 16, ie the numerical value of the code, with all 4 bits at logical 1, should correspond to a radiation power of 100% and a filling factor of 100%.
  • a 3-bit data word corresponds to the selection of the filling factor, each with a code class.
  • a code may, for example, have more than 16-bits for the said example, the concrete code being selected for example by a 4-bit random number from the set of codes with the same filling factor. For example, it makes sense to consider the physiological sensitivity.
  • Channel (CHN) are generated. If the channel (CH N) always sent the same code, this would mean that individual frequencies would be preferred. The goal of blurring the transients would be missed. It therefore makes sense to exchange the codes from period to period. Codes of the same fill factor are combined into code classes. In the example of a 4-bit long code, there are therefore five code classes, namely the code class 0 with fill factor 0% with only one code, the code class 1 with fill factor 25% with four codes, the code class 2 with fill factor 50% with six codes, code class 3 with fill factor 75% with four codes and code class 4 with fill factor 100% with again only one code (see the right-hand column of the table).
  • the exchange can for example take place in that, for example, as described above, by means of a feedback shift register and ei ⁇ nes simple primitive polynomial, which is implemented for example in the form of a entspre ⁇ sponding logic, a random or pseudo-random number (ZZ) in a random number generator (ZG ) is generated, but not directly to the control of the lighting means and / or the LED, but to select the active code to be used from the set of allowed and / or possible codes for the next transmission period from the codes of the given code Class is used by a controller (CTR) and sets this to be used active code.
  • the code class corresponds to the desired fill factor. It corresponds in function to that of the duty cycle in a PWM.
  • a fill factor for the drive signal can thus be determined, which deviates substantially from 50%, that is, at least in certain operating positions less than 45% and / or more than 55%.
  • CTR Con ⁇ troller
  • the selection of codes within a code class may be restricted due to EMC requirements. That's the way it is, for example the example discussed here, conceivable not to use all six codes with filling factor 50% (see table), but, for example, only two or even only one of these six possible codes. However, the use of only one code would result in a periodic signal, since then no selection of the code due to the random signal can take place and the control signal would lose the property of a random signal.
  • a code bit sequence 0010 could thus be transformed into the sequence 0110, wherein the first 1 of the sequence due to the low-pass characteristics of the driver (DRV, TRI, TR2, TR3), the leads (102, 103, 103) and the LEDs (106 , 107, 108, R, G, B) is not shown, so that again the desired code 0010 results as the active code effectively represented by the LEDs.
  • the illumination device therefore typically comprises a plurality of light means and / or LEDs in at least two, but typically three or four or more different, in a specific embodiment. which colors. These are typically designed to be connected to an electrical power supply.
  • the power supply includes an electrical circuit and a common potential reference (105).
  • the driver means (TRI, TR2, TR3, DRV) for operating the plurality of light emitters and / or LEDs are also part of the device.
  • the driver means (TRI, TR2, TR3, DRV) are connected to said light sources and / or LEDs and the circuit and comprise the respective current paths (102, 103, 104) the at least two differently colored light bulbs / LEDs corresponding switches and / or regulators , Furthermore, a control for the aperiodic and independent opening and closing of the at least two switches or at least two regulators is provided. In this case, under the opening and closing in the case of a said regulator, a reduction or increase in the energy throughput by the respective controller should be understood.
  • the controller is connected to a wired or wireless data network and / or a data line and / or a data bus.
  • the controller may have a variable from the outside by means of programming or with the aid of an address generator, which is part of the device variable bus address.
  • This bus address is used by the device to z. B. from the data stream data, in particular data packets or other data messages, filter out. It thus identifies the respective proportion of an assigned input data flow and reacts thereto typically by changing a parameter of the device. For example, it is conceivable to exchange a code or parts of the code table (CTAB) or the entire code table (CTAB). It should be noted at this point that the size of the code table (CTAB) does not necessarily have to be 2 n , where n denotes the length of the code.
  • the code table (CTAB) is implemented much shorter with fewer codes. It is therefore an essential possible feature of the device according to the invention that the selection of the active codes is influenced by specifications via the said data interface.
  • typically at least two of the luminous means are LEDs.
  • the controller (101) typically generates a multiple by means of the drivers (TRI, TR2, TR3). number of drive signals (102, 103, 104).
  • the control signals (102, 103, 104) do not correlate with each other. This non-correlation may also refer only to portions of the signals. For example, it is conceivable that a correlation only occurs after 256 or 512 or 1024 or 2048 or 4096 clocks, which does not correspond to the technical optimum.
  • Each of the drive signals (102, 103, 104) corresponds in each case to one color of the plurality of LEDs (106, 107, 108, R, G, B) and / or light sources of different colors.
  • each of the drive signals (102, 103, 104) is generated in that at least one respective switch or controller associated with the respective drive signal is opened and closed in accordance with the respective logic state of the internal drive signal (S) of the drive signal also associated with the respective drive signal respective channel (CHN) of the control unit (101) is caused.
  • the frequency spectrum of the amount of the frequency of the drive signal as described above, band-limited. This means that the signal has a lower limit frequency co u and / or an upper limit frequency ⁇ 0 .
  • said data flow component determines the data for determining the respective active regions of the transmission codes which emit the at least two differently colored LEDs. It is particularly advantageous if the data flow component, that is to say typically a data packet intended for the device, determines a predefined or preprogrammed color palette in the form of a subset of the possible active codes.
  • the device therefore has, per light source, a subdevice which converts the subset of the possible active codes corresponding to this data flow component into a random sequence of on and off signals and in particular into a drive signal (S) for the said switch with the preselected fill factor.
  • the controller comprises at least two registers for controlling the at least two differently colored ones Lamps / LEDs.
  • registers or register parts are each used to store values which, for example, receives the said data interface from a data flow.
  • These data flow components in particular data packets, are then assigned to the respective differently colored lamps / LEDs and, for example, each specify the said fill factor and thus the active code class. This can happen on the one hand in the form that the content of the data flow component directly reflects the fill factor that is to be used or, on the other hand, in such a way that the content of the data flow component directly or indirectly refers to the fill factor via further tables, which should be used.
  • color palettes are conceivable, which can then refer to the register contents. This is particularly efficient when z. B. a restriction to 16 colors takes place. In this case, not all data but, for example, only a 4-bit data word for the color must be transmitted.
  • the fill factor of each individual drive signal (102, 103, 104, Out) is then determined with the aid of the color palette.
  • the device may conveniently have a controller adapted to adjust the code fill factor appropriately. As described above, it is determined which type of code may be used at all. In the example of a four-bit code shown here, the possible filling factors of 0%, 25%, 50%, 75% and 100% of the exemplary code classes 0 to 4 result Filling factors close to the value of 50% each, the maximum number of code variations possible. If this code is sent to a light source or an LED, then the average duty cycle per duty cycle is equal to the product of code transmission time and fill factor. This means that the behavior is analogous to that of a PWM in which the data values are be assigned to the average duty cycle per unit time of the associated color LEDs (general color lamps).
  • the controller comprises at least one further register for the control of the at least two differently colored lamps or LEDs.
  • this third register or this third register part is used in each case for storing a third value, which, for example, the said data interface also receives from a data flow.
  • the direct use of the value is possible, but also the indirect use of a color palette possibly associated with the code palette.
  • the content of the third value refers to the correct code table.
  • This data flow component, in particular a data packet is, in the direct utilization of the active code table extension associated with, and controls, for example, Se ⁇ lesson of the codes from the code table.
  • the device It is basically useful to provide the device with a housing which substantially surrounds the plurality of light emitting devices or LEDs, the driver means (TRI, TR2, TR3, DRV) and the said controller (101).
  • the device comprises an electrical regulator for controlling the maximum currents supplied via the current paths to the plurality of LEDs so as to keep the maximum currents at constant maximum values. This has the advantage that the color temperature of the LEDs can be kept constant.
  • the amplitude of the pulse signal is typically also regulated.
  • the device may be connected and / or provided with a color sensor which allows the control unit (101) to control the filling adjust the factor and / or the color temperature of the lamps or LEDs so that the desired color emission or color reflection of the irradiated object is achieved.
  • a color sensor which allows the control unit (101) to control the filling adjust the factor and / or the color temperature of the lamps or LEDs so that the desired color emission or color reflection of the irradiated object is achieved.
  • it makes sense to measure the color temperature of one channel (CHN, CHN1, CHN2, CHN3) whenever the other channels are turned off, for non-correlated drive signals (102, 103, 104, Out), random signals, or Pseudo-random numbers are based, will be the case again and again. This makes it possible to readjust the color temperature very easily by readjusting the maximum current and / or the maximum voltage and / or the maximum energy.
  • the device comprises an electric regulator for controlling the maximum power to the plurality of bulbs or LEDs supplied via the current paths, so as to maintain the picked up by the lamps or LEDs maximum energy kon ⁇ constants maximum values.
  • an electric regulator for controlling the maximum power to the plurality of bulbs or LEDs supplied via the current paths, so as to maintain the picked up by the lamps or LEDs maximum energy kon ⁇ constants maximum values.
  • the device comprises a regulator for controlling the maximum currents supplied via the current paths to the plurality of LEDs or the maximum electrical energy so as to keep the maximum currents and / or maximum energy at constant maximum values, wherein the housing in the Substantially in addition to the plurality of LEDs, the driver means (TRI, TR2, TR3, DRV) and the controller (101) now also the controller (PWR) surrounds.
  • the driver means TRI, TR2, TR3, DRV
  • PWR controller
  • the controller is for identifying and responding to an input data flow component, ie the respective data packet, in accordance with a LIN data protocol and / or a Flexray data protocol and / or a CAN data protocol and / or a KNX data protocol and / or an I P data protocol and / or a USB data protocol and / or a H DMI data protocol.
  • an input data flow component ie the respective data packet
  • the institution can independently determine its position in the network.
  • the device has a first data interface and a second data interface.
  • the passage of the first data interface to the second data interface sol lte preferably as ⁇ of depend, has whether keep the data interface already ress a valid bus ad ER. If this is not the case, the data packets are not forwarded.
  • the device via a radio interface ⁇ and / or Bl uetooth interface and / or a WLAN interface features.
  • each input data stream portion comprises advantageously each a data word from one or a more ⁇ plurality of bits or bytes for each illuminant and LED color.
  • the byte contains 8 data bits for specifying the intensity of the respective LED color within a range corresponding to the decimal numbers 0 to 255.
  • the controller is set up to control the filling factor of the respectively applied codes in accordance with the bit content of the respective data word.
  • the plurality of lamps or LEDs comprises red and / or green and / or blue and / or yellow and / or white lamps or LEDs and / or UV lamps or LEDs and / or or IR bulbs or LEDs.
  • I can Meh rzah l of lamps or LEDs comprisel le and / or parallel Anord tion of lamps n or LEDs include.
  • a device according to the invention can be used in a lighting network.
  • Such an illumination network according to the invention comprises a central controller for generating said input data flow and a plurality of illumination devices as described above.
  • Each of the lighting devices should be adapted to receive the data flow and to set its variable bus address currency ⁇ rend the initialization different from the reststrongsvorrichtun ⁇ gen of the lighting network and in contrast to the state of the art itself, to ensure that the lighting devices respond to different portions of the input data flow.
  • each of the lighting devices has a device to generate a variable network address (bus address) itself, which could also depend preferably on the location of the lighting network.
  • bus address variable network address
  • Exemplary methods for this are disclosed in DE-B-102 56 631, EP-B-1 490 772, EP-B-1 364288 and / or in EP-A-2571 200.
  • the control provides, for example, a bus address to all bus subscribers (lighting device) at the same time and the bus subscribers decide whether this bus address is suitable for the respective bus subscriber. If this decision is positive, the bus participant accepts the provided bus address and signals to all other bus participants that this bus address has been taken over or that now the transfer of the next bus address by another bus participant should be done.
  • This signaling can take place, for example, by passing the data flow from said first data interface of the lighting device to said second data interface of the lighting device and vice versa from the time at which the variable bus address of the lighting device has been adopted.
  • the bus address is not concretely assigned to a bus subscriber. It is thus the case that the controller provides the network - ie all bus users - with a bus address for (free) use. According to this procedure, individual bus users decide independently whether they use this bus address. It is thus not an assignment with respect to a single bus participant, but the assignment of the bus address to a network position.
  • the particular advantage of this method is that the individual bus users receive their bus address due to their position and do not have to be preconfigured.
  • bus user may also be appropriate for the bus user to maintain the address table of all network addresses (bus addresses) of the lighting network used.
  • the bus user selects one of the bus addresses independently, determined by the position in the cable harness.
  • Fig. 7 shows an exemplary embodiment (schematically) of a lighting device according to the invention
  • Fig. 8 shows another example (schematically) of a lighting device
  • Fig. 9 again an embodiment of a lighting device
  • Fig. 10 is an illumination device similar to the one of FIG. 9, Fig. 11 shows another illumination device similar to that of FIG. 8 and FIG. 12 a further fürsfal l for the inventive concept.
  • Fig. 1 shows the spectrum of a bipolar PWM according to the prior art.
  • FIG. 2 shows the schematic structure of an exemplary device 100 according to the invention with di er groups of RG B luminous means 108, 107, 106, in particular in the form of LEDs. A group may also contain a light source and further electrical components and devices.
  • the control unit 101 has in d iesem example, via a data interface 109. A bout this data interface 109 communicates the erfind ungsdorfe Before ⁇ device 100 with the lighting network in which the device is integrated erfind ungsdorfe 100th
  • the control unit 101 outputs three drive signals 102, 103, 104 with which the groups of RG B luminescent means 106, 107, 108 are operated.
  • the aim is in this example, marked "R" Illuminant group emit red light, w ith “B” marked radiate Leuchtmit ⁇ telelle blue light and the ith "G” marked Illuminant ⁇ group g reen emit light.
  • Fig. 3 shows an exemplary basic system clock 1 'that determines the position of the edges of the drive signal 4'. The time is shown from left to right.
  • the codes 2 ' which are respectively active, are shown.
  • the possible exemplary codes with exemplary code length four are listed in the table above. These are the exemplary 4-bit codes already shown. In reality, as mentioned, other and especially larger code lengths make sense. Since the codes have a code length of four bits, a new random number 5 'is determined with every fourth clock of the basic system clock 1', and then the corresponding code is selected as the new active code 2 '.
  • the method for determining the random number 5 ' is preferably selected so that all codes of the currently active filling factor can be selected with the same probability. In the example, the active fill factor is 50%.
  • FIG. 3 shows the corresponding PWM signal 6, which clearly shows the difference between the modulation according to the invention and the known PWM modulation and activation of the light sources or LEDS.
  • the base system clock 1 'could, instead of monofrequent, as shown in FIG. 3, even within predeterminable frequency limits (with the lower limit not equal to zero) being bandwidth limited, which would result in asynchronous clocking of the system.
  • 4 shows an example implementation of the control unit 101.
  • the exemplary control unit has a microcontroller pC which forms a microcomputer system together with a memory unit RAM / ROM / FLASH and the clock generator CLK.
  • the partial devices of the exemplary micro-computer system are connected via an internal data and control bus IBUS MITEI ⁇ Nander. Connected to this internal data and control bus IBUS is a data interface IF, via which the microcontroller pC can communicate with the rest of the lighting network.
  • the data interface IF is connected to the external bus EBUS, which together with the aforementioned data interface (IF) with the aforementioned external data interface (109) of FIG. 2 is identical.
  • a power supply PWR powers the device.
  • the power supply PWR receives the electrical energy via an external power connection EXTPWR. It is above ⁇ geous if the microcontroller pC query their state through the internal bus IBUS and thereby alter the performance of the device if necessary.
  • a switch-on detection circuit PWRst returns the device to a defined state when the external power supply of the device is turned on via the external power terminal EXTPWR.
  • address generation AdrGen attempts to generate a bus address assigned only once in the lighting network. This is provided to the interface IF.
  • This basic computer system largely corresponds to the state of the art.
  • the device according to the invention now has a respective channel CHN, CHN1, CHN2, CHN3 via a driver device DRV, TRI, TR2, TR3 with an output signal Out, each one of said drive signals 102, 103, 104 as output signal Out for one of the aforementioned groups generated by RGB bulbs 108, 106, 107.
  • a random number generator ZG generates a random number ZZ and makes it available to a controller CTR.
  • the controller generates the drive signal S by means of the time base CLK, the code table CTAB and a register value REG which determines the fill factor. This is controlled by a driver DRV converted to the said low-ohm output signal Out.
  • the driver may include a controller that controls the maximum level of the out signal according to a default. This specification can be achieved, in particular, externally, for example via a register or by measuring the color temperature. The controller can thereby regulate the maximum current or the maximum energy or the maximum voltage. A regulation of the maximum current is particularly advantageous.
  • the controller is in this sense a part of the driver.
  • the driver has at least one first switch which, depending on the drive signal S, connects the driver output Out to the energy source, preferably via the controller.
  • the driver will have a push-pull stage with two switches of which the additional second switch will connect the output Out to, for example, the reference potential 105 only when the other aforementioned first switch is open.
  • the driver DRV is powered by the power supply PWR with energy.
  • the reference potential 105 is supplied via a separate terminal Ref.
  • the current of the TRI, TR2, TR3, DRV drivers is fed back from the RGB LEDs in 106, 107, 108 and LEDs.
  • three channels CHN are necessary. In FIG. 4, however, only one channel CHN is shown as a representative of the plurality of channels CHN1, CHN2, CHN3 of a control device 101 for the sake of simplicity.
  • the drive signals in the sequence always include a signal out for a single channel.
  • this signal Out represents a plurality of drive signals 102, 103, 104 when multiple channels CHN1, CHN1, CHN3 are used. In the example of the three drive signals 102, 103, 104, these are therefore likewise encompassed by the more general term Out.
  • 5 shows an exemplary lighting network with a central control unit CENTR and four exemplary devices 100 according to the invention, which are connected to one another via a star-shaped bus.
  • FIG. 6 shows an exemplary lighting network with a central control unit CENTR and four exemplary devices 100 according to the invention, which are interconnected via a sequential bus. Each of the devices has an additional second data interface. This makes it possible to carry out a method for determining the variable bus address as disclosed in DE-B-102 56 631, EP-B-1 490 772, EP-B-1 364 288 and / or in EP-A-2571 200.
  • Fig. 7 shows an exemplary schematic device according to the invention with two interfaces IF1, IF2, which are each connected to a data bus EBUS1, EBUS2.
  • This device is suitable for a bus system according to FIG. 6.
  • the device also has an example of a radio interface TX / RX.
  • 8 shows an exemplary schematic device 200 with inductive loads 206, 207, 208 connected to a star.
  • the control device 201 described above generates in each case a control signal 202, 203, 204 by means of three channels CHN1, CHN2, CHN3, each having a driver TR. It is known from the prior art that such constructions are suitable, for example, to control the stator field coils of brushless DC motors.
  • the drivers TR must be suitable for the control of inductive loads.
  • FIG. 9 shows a device similar to that of FIG. 8, with the difference that the star point 205 is now controlled via a further channel CHN4 and an associated driver TR.
  • the output of the driver 210 drives a separate neutral inductance. The goal is typically that the neutral point voltage is OV.
  • Such a topology is beispielswei ⁇ se useful if the information of the measuring means of the channels CHN1, CHN2, CHN3, CHN4 also for determining the position of the rotor of a rotating machine, such as a brushless DC motor used, ⁇ the intended.
  • FIG. 10 shows a device similar to that of FIG. 9, with the difference that the reference potential of the control device 201 is no longer connected to the neutral point.
  • FIG. 11 shows a device similar to that in FIG. 8, with the difference that the inductances are now connected in a delta.
  • Fig. 12 shows another relevant application in which the possibilities for improving the electromagnetic compatibility can be discussed particularly well.
  • the device here has only a single channel CHN1.
  • the latter controls the line 302 via the driver TR.
  • the line has a parasitic inductance 308 and a parasitic capacitance 312. It would be the task of the circuit 300 to supply a load 307, for example an LED, with electrical energy in such a way that the resonant circuit of the inductor 308 and capacitance 307 does not oscillate due to the switching operations or, if this is to happen, quickly oscillates ,
  • the problem is not limited to the resonant frequency of the resonant circuit consisting of inductance 308 and capacitance 312, but typically also extends to harmonics of the resonant frequency. For example, it is typically possible to specify a sensitivity spectrum e (f) as a function of the frequency.
  • e (f) a sensitivity spectrum
  • the control unit stores at least one time-limited sequence of the transmitted codes and thus the transmitted bit sequence. Before the transmission of a code this is checked by the controller 201 on suitability. The most suitable code is sent.
  • the code with the lowest excitation in this example the code with the lowest rating, is selected for the transmission. If the application is known very precisely, the code to be selected or a sequence of codes to be selected can already be predicted in the design phase for various filling factors and stored in the device or hardwired. Moreover, it is conceivable that in the respective application a fill factor which deviates to a small extent from the given fill factor, the target fill factor, would not be noticeable. Therefore, it is quite possible, though codes be checked with a slightly different filling factor. In the assessment, these are given a "times", which should be the greater the greater the deviation of the filling factor.
  • this penalty may be an evaluation offset and / or a factor that degrades the evaluation result.
  • Others, especially nonlinear Bewertu ngsme ⁇ methods are conceivable.
  • the system therefore selects the code which, with regard to the evaluation of the electromagnetic compatibility - here the exemplary oscillation of a series resonant circuit - and with regard to the evaluation of the result for the user, represents the optimum properties in the sense of an optimal compromise.
  • the exact evaluation function with respect to these two evaluation dimensions might vary greatly from application to application, so it should remain with these examples.
  • individual features of the inventions are listed, subdivided into groups, which can define the invention individually or in any desired combinations, in groups or groups.
  • a lighting device comprising:
  • controller 101 for aperiodic and independent opening and closing of the at least two switches or at least two controllers
  • the opening and closing of the regulators is understood as meaning a reduction or increase in the energy throughput through said regulators, and wherein the controller 101 has a variable bus address for identifying and responding to a respective portion of an assigned input data flow the data flow portion of this controller 101 is assigned by means of said variable bus address,
  • said bulbs 106, 107, 108 are LEDs and
  • controller 101 generates a plurality of drive signals 102, 103, 104, Out, and
  • each drive signal Out, 102, 103, 104 respectively corresponds to one color of the plurality of LEDs and / or light sources 106, 107, 108 of different colors
  • each of the drive signals Out, 102, 103, 104 is determined by the opening and closing of one of the at least two switches or regulators for opening and closing in accordance with the respective logic state of at least one drive signal S, and
  • a data flow component of the data stream on a data bus EBUS, 109 or a radio-controlled data stream comprises data for the direct or indirect determination of the respective fill factor of the respective at least two drive signals Out, 102, 103, 104 of the at least two differently colored LEDs 106, 107, 108 or lighting means.
  • control device 101 comprises at least two registers Reg or at least two parts of registers for the at least two differently colored LEDs and / or lighting means, the are respectively configured to store respective data values of the data flow component for the at least two differently colored LEDs and / or illuminants, wherein the controller 101 is adapted to determine the data values for determining the fill factor of the drive signal Out, S, 102, 103, 104 of each associated color LEDs directly or indirectly via a
  • At least one An Gambsig nal Out, S, 102, 103, 104 is a digital signal which is a Zufal ls tile or pseudorandom sequence with a fill factor, which differs from 50% at least in a union's possible operating position is and / or is less than 45% or different from 50% and / or greater than 50%.
  • the controller 101 for is set, the data values for determining the permissible codes for the coding of the drive signal
  • Device according to one or more of the preceding points, further comprising an electrical regulator DRV for controlling the maximum currents supplied via the current paths to the plurality of LEDs, so as to keep the maximum currents at constant maximum values.
  • an electrical regulator DRV for controlling the maximum currents supplied via the current paths to the plurality of LEDs, so as to keep the maximum currents at constant maximum values.
  • Device according to one or more of the preceding points, further comprising an electrical regulator DRV for controlling the maximum energy supplied via the current paths to the plurality of LEDs, so as to keep the maximum energy absorbed by the LEDs at constant maximum values.
  • an electrical regulator DRV for controlling the maximum energy supplied via the current paths to the plurality of LEDs, so as to keep the maximum energy absorbed by the LEDs at constant maximum values.
  • the device further comprising a regulator for controlling the maximum currents delivered via the current paths to the plurality of LEDs or the maximum electrical energy, so as to maintain the maximum currents at constant maximum values, the housing substantially in addition to the plurality of LEDs, the drivers TRI, TR2, TR3, DRV and the controller 101, the controller surrounds.
  • each input data flow component each comprises a data word containing the fill factor for determining the intensity of the respective LED color, and the controller is adapted to the fill factor of at least one drive signal in accordance with the bit content to control the respective data word.
  • the plurality of LEDs comprises red and / or green and / or blue and / or yellow and / or white LEDs and / or a UV-LED and / or an IR-LED.
  • the plurality of LEDs comprises a serial and / or parallel arrangement of LEDs.
  • the device comprises at least one random number generator ZG and / or a pseudo random number generator.
  • the device comprises at least one code table CTAB.
  • the device comprises more than one, but at least two code tables CTAB, which are selected by a Reg ister- value. 18.
  • Device according to one of the preceding points, wherein the device comprises a color palette which specifies a fill factor as a function of a register value for at least one channel CHN. 19. Device according to one of the preceding points, wherein the device comprises at least one data interface IF, 109.
  • the device comprises at least one data memory (eg RAM / ROM).
  • data memory eg RAM / ROM
  • the device comprises at least one subdevice PWRst, which sets the device in a defined state when it passes from a state of insufficient power supply to a state of sufficient power supply.
  • the device outputs at least two drive signals 102, 103, 104, Out, which do not correlate with one another when forming an auto-correlation function or cross-correlation function.
  • the device outputs at least two drive signals 102, 103, 104, Out, which correlate with each other at least 256 or 512 or 1024 or 2048 or 4096 clocks when forming an auto-correlation function or cross-correlation function.
  • the device has a color sensor which measures the radiated color of the light the plurality of bulbs 106, 107, 108 and / or LEDs or the color of the reflected of the plurality of bulbs 106, 107, 108 and / or LEDs missing.
  • the device measures the color temperature of a single plurality of bulbs 106, 107, 108 and / or LEDs when only one of the drive signals 102, 103, 104, Out is active and the associated plurality of this PCM signal associated bulbs 106, 107, 108 and / or LEDs associated with this drive signal supplied with energy.
  • Lighting network comprising
  • a central controller CENTR for generating an input data flow
  • each of the lighting devices is adapted to receive the data flow and to otherwise set its variable bus address by means of a car addressing device AdrGen so as to respond to different portions of the input data flow.
  • AdrGen car addressing device
  • a lighting network according to one or more of the items 28 to 30, wherein a satellite and / or lighting device maintains an address table of all or part of the network addresses (bus addresses) of the lighting network used.
  • Lighting network according to item 31, wherein a satellite and / or a lighting device automatically selects one of the bus addresses of the address table as a variable bus address on the basis of the position in the wiring harness.
  • a method for generating a drive signal wherein the drive signal is a random signal or pseudo-random signal whose relative fill factor is less than 45% and / or greater than 55%.
  • Method according to item 33 or 34 wherein at least at times at least two different codes are output at different times and not overlapping and with the same fill factor as part of the drive signal.
  • the method according to item 35 wherein a random number ZZ or a random signal or a pseudorandom signal or a pseudorandom number determines which of the at least two different codes is selected or generated and output as the active code.
  • a method for supplying a load with electrical energy wherein the load is supplied with an electrical power that is modulated with a drive signal generated according to a method according to any one of items 35 to 39.
  • 41. A method for supplying a consumer with electrical energy according to any one of items 35 to 40 with a Anêtsig signal, wherein the consumer is a light emitter and / or an LED.
  • a method for supplying a consumer with electrical energy according to one of claims 35 to 42, wherein at least one active code of a code table CTAB depending on a Zufal lsiere ZZ and / or a Zufal lssignal and / or a pseudo-random number and / or a pseudo random signal is taken. 45.
  • a method for supplying a consumer with electrical energy according to item 45 wherein the at least one active code of a code table (CTAB) is selected in dependence on a valuation result.
  • a method of powering a load with electrical energy wherein the output energy, the fill factor, is different from the energy that would be output according to a control value, the target fill factor, and wherein this deviation alters the spectrum of the supply line signal.
  • Device characterized in that it performs a method according to one or more of the points 33 to 44.
  • a method for generating a sequence of binary codewords of a multi-bit code for a drive signal wherein in the method
  • a multi-bit code is provided with a plurality of binary codewords each having the same number of n-bits, n> 1, which can be subdivided into at least two code classes of codewords, wherein at least one code class comprises a plurality of codewords having the same Number of one bits and the number of one bits of the code words of the code classes is different from code class to code class, and
  • the control signal is generated as a sequence of the codewords of a code class in that the codewords of this code class are randomly or quasi-randomly controlled in the control signal or in randomly varying or deterministically varying order. consequences.
  • the method according to item 51 wherein the order of the code words forming the drive signal of a code class is repeated cyclically.
  • Method according to item 51 or 52 wherein as the code class from which the code words forming the drive signal are selected, only one code class is associated with which codewords are assigned, their number of one bits in relation to the number of n bits of the multi-bit code is within one or more percentage ranges.
  • Method according to one of the items 51 to 56 wherein the clock frequency of the drive signals with which the code words are transmitted is mono-frequency or bandwidth-limited with a lower limit frequency not equal to zero and an upper limit frequency and thus variable.
  • Method according to one of the items 51 to 57 wherein, if necessary, one or more code words of one or at least one other code class are transmitted within a temporal succession of code words of a code class.
  • Method according to one of the points 51 to 59, wherein by its use for supplying at least one consumer, in particular a lighting means such.
  • a lighting means such.
  • an LED or a consumer with a possibly parasitic, ohmic and / or inductive and / or capacitive load, as in electrical / electronic articles / components in the automotive sector and / or daily life for z.
  • electrical energy As residential and / or industrial buildings, accessories, transport are encountered, with electrical energy.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

L'invention concerne une dispositif d'éclairage qui comprend une pluralité de sources lumineuses, se présentant en particulier sous la forme de diodes électroluminescentes de différentes couleurs, et des circuits d'attaque destinés à faire fonctionner la pluralité de LED. En outre, le dispositif comprend plusieurs commutateurs et/ou régulateurs qui sont interconnectés à la pluralité de LED dans un circuit de courant, qui correspondent au trajet de courant respectif et qui font partie des circuits d'attaque, ainsi qu'une commande associée (101) servant à ouvrir et fermer de façon apériodique et indépendante lesdits commutateurs ou régulateurs. Selon l'invention, la commande (101) peut comporter une adresse de bus variable pour identifier une partie respective d'un flux de données d'entrée attribué et réagir à celle-ci. Le dispositif de commande (101) génère alors une pluralité de signaux de commande (102, 103, 104). Chaque signal de commande (102, 103, 104) correspond à une couleur respective de la pluralité de LED (106, 107, 108, R, G, B) de couleurs différentes. L'état logique de chacun des signaux de commande (102, 103, 104) est déterminé par l'ouverture et la fermeture de l'un des commutateurs ou régulateurs correspondant à l'état logique respectif d'un signal de commande. Le spectre de fréquence de la valeur de la fréquence du signal de commande respectif (102, 103, 104) et/ou du signal de commande respectif a une bande limitée. Selon l'invention, une partie du flux de données comprend, sur un bus de données (EBUS, 109) ou à l'intérieur d'un flux de données transmis par radio, des données servant à déterminer le facteur de remplissage respectif du signal de commande respectif (102, 103, 104) et/ou du signal de commande respectif destiné aux LED respectives de différentes couleurs.
EP14780448.8A 2013-09-30 2014-09-30 Dispositif d'éclairage Active EP3053409B1 (fr)

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DE102013016386.2A DE102013016386A1 (de) 2013-09-30 2013-09-30 Vorrichtung und Verfahren zur Einstellung mehrfarbiger Lichtszenen in Kfz
EP14156035.9A EP2854483A1 (fr) 2013-09-30 2014-02-20 Dispositif d'éclairage
EP14155995.5A EP2854482A1 (fr) 2013-09-30 2014-02-20 Procédé de génération d'une séquence de mots de code binaires d'un code à bits multiples pour un signal de commande Pulse Modulated pour un consommateur
PCT/EP2014/070893 WO2015044447A2 (fr) 2013-09-30 2014-09-30 Dispositif d'éclairage
EP14780448.8A EP3053409B1 (fr) 2013-09-30 2014-09-30 Dispositif d'éclairage

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EP3053409A2 true EP3053409A2 (fr) 2016-08-10
EP3053409B1 EP3053409B1 (fr) 2019-08-28

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EP14155995.5A Withdrawn EP2854482A1 (fr) 2013-09-30 2014-02-20 Procédé de génération d'une séquence de mots de code binaires d'un code à bits multiples pour un signal de commande Pulse Modulated pour un consommateur
EP14783571.4A Active EP3053410B1 (fr) 2013-09-30 2014-09-30 Procédé de génération d'une séquence de mots de code binaires d'un code multi-bits destiné à un signal de commande destiné à un consommateur
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EP14155995.5A Withdrawn EP2854482A1 (fr) 2013-09-30 2014-02-20 Procédé de génération d'une séquence de mots de code binaires d'un code à bits multiples pour un signal de commande Pulse Modulated pour un consommateur
EP14783571.4A Active EP3053410B1 (fr) 2013-09-30 2014-09-30 Procédé de génération d'une séquence de mots de code binaires d'un code multi-bits destiné à un signal de commande destiné à un consommateur

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DE102014014679B4 (de) 2014-09-29 2020-12-03 Elmos Semiconductor Se Vorrichtung zur Erzeugung von PDM-modulierten Signalen für die Versorgung von LEDs für die Beleuchtung in Kfz
DE102014014678B4 (de) 2014-09-29 2020-08-06 Elmos Semiconductor Aktiengesellschaft Vorrichtung zur Erzeugung von PWM-modulierten Signalen für die Versorgung von LEDs für die Beleuchtung in Kfz
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DE102014014677B4 (de) 2014-09-29 2023-08-31 Elmos Semiconductor Se Verfahren zur Erzeugung von PDM-modulierten Signalen für die Versorgung von LEDs für die Beleuchtung in Kfz
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EP2854482A1 (fr) 2015-04-01
EP3053410B1 (fr) 2021-08-04
EP3053410A2 (fr) 2016-08-10
EP2854483A1 (fr) 2015-04-01
DE102013016386A1 (de) 2015-04-02
WO2015044442A2 (fr) 2015-04-02
EP3053409B1 (fr) 2019-08-28
WO2015044447A2 (fr) 2015-04-02
WO2015044442A3 (fr) 2015-08-13
WO2015044447A3 (fr) 2015-08-13

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