• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a circuit arrangement (10) for operating and arranging at least one LED comprising a converter (12) with at least one converter switch; a drive device (14) for the at least one converter switch, the drive device (14) having an interface for coupling to a dimming device (16) for supplying a dimming value, the dimming value being correlated with a dimming value, the drive device (14) is designed to provide at its output a Hf signal with a vorgehba ren duty cycle; and an output coupled to the transducer output for coupling to the at least one LED, wherein the driver (14) is adapted to modify the Hf signal by superimposing a PWM signal at least above a first pre-dimming threshold with increasing dimming such that it correlates the supplied dimming value is cut out of the Hf signal for a number of periods of the RF signal; and wherein the driving device (14) is adapted to set dims corresponding to dimming values between a first and a second dimming value different from each other by at least one period of the RF signal, the duty ratio of the RF signal during at least one audible period of the RF signal to reduce. The invention also relates to a corresponding method for operating and dimming at least one LED.
    公开号:AT514354A2
    申请号:T50362/2014
    申请日:2014-05-21
    公开日:2014-12-15
    发明作者:
    申请人:Osram Gmbh；
    IPC主号:
    专利说明:

    ma mam mmmm mmemum dmr LEI)
    Technical area
    The present invention relates to). «De Schahungsanordnnng for operating and dimming at least one LED · comprising an input with a first and a second. An input solenoids for doubling with a supply rail tensioner, a transducer with at least one wiper sounder, the transducer being coupled to the input port, a buoyancy sensor for the at least one bucket, the on-control device interfacing with a dimming device for feeding a buzzer Dimm value-comprising, where the thumb is correlated with the Dimmong, with the Ansandaervomentung further swept in on her. An output is BDSignai having one of: controllable sense signals and an output having a first and a second output signal for doubling with the at least one LED, the output being coupled to the output of the converter, the start-up signal being out, at least from a first one When the dimming speed increases, the dimming threshold of a PWM signal is changed so that, in correlation, with the given value. a predeterminable number of periods of HESignals from the HDSigoal is cut out. It also contains a corresponding method for operating and dimming at least one LED.
    State of the art
    In particular, the present invention relates to the operation and dimming of light sources comprising a plurality of LEDs; However, it can also be used to operate and dim individual LEDs. Bel light sources. When dimming, the light color ued / or the brightness of the individual LEDs, caused by scattering of the individual LED parazneters (finished-off control, in particular due to the scattering of the individual non-linear LBD indices), can be greatly different Therefore, the behavior of most LEDs is not exactly specified
    The Scbaliwanbier used in general for the driving of LEDs »such. For example, in the document US 2OO6 / O033484A1 Oücnban »are therefore controlled with a high-quality PWM signal» rem dim the Tasiverhahnis this HftSignals is reduced.
    In the writing US 2O0S / O224629A! is the boehmfteqnerrte PWM--Sigu.al a Schaltwaran fers in the Aas-state of a sewn-up phase-off or "gating dimmer in a mode to operate" the Sen whmengen between Sc hook turned and dimmer dampens.
    In the publication US 2012 / 0019160Α1, the amplitude of a low-frequency FWM current is dependent on hooves of a longitudinal regulator. Dotw-Cycle of the corresponding mederftequen ·· th PWM signal set.
    For all Dinmt Veriabreu mentioned above. According to the state of the art, the current provided to the LEDs during the duo-toe may not exceed an anticipated minimum since otherwise the negative effects already mentioned above would occur. Usually this minimum is assumed to be approx. 30% of the nominal current. To achieve dimming values below this passable dimming threshold; in the state of the art, the HhSigaah corresponds to a current through the LEDs of about 30% of the rated current, "said the ho dH it becomes a low-pulsed PWM-sig-aa! superimposed so that the HDSlgnai passed only near ml of certain times to the exit of the Anmeuervorriehtung, becomes. the rest of the time not (so-called FWMdfemmen) ..
    After that, the low-frequency FWM. "Dimming, already made on the basis of the rated current dam, this is in practice due to the thereby occurring (Dünsche (choke) not realized»
    Fig. 1 shows in this context the. temporal course of the Ansteuervorriebiung. the incoming signal AS provided to the weight-balancer for two separate dim values. This hit signal, which triggers a period TI and an Lnr-toe ρ.η · and an OfUZeit Ufn, is superimposed on a low-frequency PWM signal; with which the HDSlgnai quasi "gegawD. In the diagram of FIG. 1, the P WM •• signal before the time DtmmseWith the OvZeit t0 "2 and the off-time Dm on and a Periodendaner T2 after dimming the period is unchanged; that is, TS T2 »however, the on-tent t ....» has decreased by one period Ti of the RF signal; He «opposed himself« · «η; according to w; gross., In liar. I is also registered the see hi the two threads resulting intake current Mo and the converter.
    The Hfe signal is for example between 60 kHz and ISO kHz. while the PWM signal can be between 100 Hz and 1000 Hz, for example. Because of this frequency response it is obvious. that only discreet dimming attestations can be set, that is to say that only one entire period 11 of the HfeSlnal can be reduced from one Dinan value to the nearer Dimmwerl. Due to tolerances, be it due to fluctuations of the tenor or the supply, it is not possible in practice. place it to lie at a desired location within u: ,, thereby. get a finer resolution while dimming za. By the illustrated procedure, at Vc > change the dimming position always whole periods of the HD signal.
    As long as the dimming does not yet represent very low density values, this works visibly. For example, if there are 500 periods of TI in t; s-a, then by falling apart a period of the HASigual, a fairly small Dimmschrhi can be educated, which would, for example, yield 409 periods of the Hh signal. However, for low dnmiae, the death of a period of the Hb signal results in proportionally large jumps in the light emitted by the LEDs. For example, if only 1.0 BAP diodes Ti are connected and a gap is formed, this corresponds to a 10% burst.
    These jumps are visible in the output current and can have a disturbing effect. A finer resolution at low di mm values is not possible. Furthermore, due to temperature or voltage changes in the system, the frequency of the hi-sigmoid may change (regulated system). The P WM signal for dimming does not adapt to a separate generation. As a result of these fluctuations, one period of the HD signal continuously drops away and returns to it. There may be an undesirable flicker. 4/17 PäFsiÄBg the Eränötmg
    The object of the present invention is therefore to use scrapers which have already been initially introduced. one. weiierzubilden the above-mentioned method so that even at low Dmimstehungen an improvement of the dimming behavior is made possible.
    This object is achieved by a scarf gsanordnung with the features of claim 1 and by a method having the features of claim 9,
    The present invention is based on the recognition that sie can optimally solve the above problem by skillfully shortening the known FWM dimming with an adapted form of analog dimming. Accordingly, the drive control is configured to only set dimming corresponding to dimming powers that are between a first and a second dimming value that differ from each other by at least one period of the HD signal, reduce the HDSI signal duty cycle during at least a predetermined period of the HPS signal ,
    Accordingly, at. Increasing dimming abruptly weggesehniden a period of the HPSignals, but the Tasiverbältnis the HPSignals in at least one period of HPSigmbs, preferably in a predetermined number of periods of Do signal "geiadedV during this at least one period of the HPSignals is from. Transducer a lower current to the at least one LBD issued than during the remaining Ön time of the PWM signal, so that iaht sie even at low Dimmersteilnngen achieve a high resolution at which jumps in the provided at least one LED output current reliably avoided can..
    By providing current to the LEDs during the majority of the ouput time of the P WM signal, which shows that there are no fluctuations in the brightness and / or brightness of the individual LEDs, the advantages can be obtained the PWM-Dirnmens, see above, in the erfinöengsgemäbe process or in the ertlodungsge-mähung Schaitungsanorönung be taken over,
    Together, it is possible to test that dimming is achieved by editing the tactile relationship of the HPS signal during at least one, preferably a plurality of specifiable 5/17
    Periods of the Hf signal nick Hekigkeitssehwaikungen .fuhrt-, since the number of these vorgebaren periods compared to the remaining Öü time of the P WM signal is relatively kure, where, however, disadvantages such as flickering through. Fluctuations in the system (Teuvpeminr / tension, etcp or visible jumps in the love emitted by the at least one LED can be reliably prevented.
    In a close range, the Aosteuorvomchiong is ausgeglmgg, when Rednxie ren the Tastverhälmisses during the at least one predetermined period of the Hb signal the frequency of the BBSignari eben lab s modlriztn, in particular to reduce or quake, the integral of the On Zeiien Over the at least one assignable period of the BBSignari means that as the integral of the on-times, the at least one predeterminable end of the BB signal precedes the song ui km ton. By raising the frequency, the ripples in the output current passed to the at least one LED be reduced. As a result, moreover, a reduction in the electromagnetic distortion can be achieved. On the other hand, a reduction in the frequency of the H1 'signal offers the advantage that the frequencies of the Hf signal are greater than at elevated or unchanged frequency, as a result of which the at least one converter harder does not go so smoothly into purely linear operation.
    Alternatively, the on control device may be designed to reduce the duty cycle while the at least one; Period during at least one period of HBSIgnari to change the frequency of HbSigmhs nick. That way it changes. the at least one LED hergestelltgestellt current proportional to the width of the impurty and is therefore very easy to predict.
    To avoid noise, in particular by a choke of the converter, the Anstcnervkhtnng be ausgeiegt, for setting Dinuntmgen between a. Dmtmong, and the first predetermined DknmschweHwert at. Increasing dimming reduces the duty cycle of the FiBSlgnais increasingly zn (To be clear: This betrüb: the case before a reduction of 'Tastverhältnisses during selected periods of the BBSignals to realize a particularly fine resolution of the dimming is made at low Dlmmwerten,) As mentioned, This is preferably carried out at most up to a Tastverhäkhs, wherein the at least one LED bereligesteilie output current ea, 30% of the denominator is ans. If one were to further reduce the tactile behavior, variations of the lichen and / or holiness would result.
    As already mentioned, according to the invention, the taching power of the Hft signal is reduced during the course of the anticipated lift of the lift signal, whereby, in an advantageous manner, the predeterminable periods of the Hft signal correspond between 0.2% and 10%, preferably 1%, of a period of the PWM signal, Thus, the reduction of the duty cycle mm during a small portion of a period of the PW Po biguab. is made, thereby fluctuations in the sanctity trnd / or the color in the delivered by the at least one LED love can be reliably avoided.
    The at least one predeterminable period of the IlftSlgnai, while reducing the T'astvsrverhältnis, holds advantageously at the end of the Ow Zeii the PWM signal, but you can in principle at any See bzsv: Steep within the on-tent of the P WM » Signals are lying.
    The frequency of the PlftSignals is preferably between 60 and 150 kHz, while the frequency of the P WjVl.-signal is preferably between 100 Hz and 20 kHz, in particular 400 Hz.
    Further advantageous starting temperatures result from the Dntnraaenruchen.
    The preferred radiofrequency devices presented with respect to the present invention and their switches. Advantages apply accordingly, as far as applicable, to yours Yerthbren.
    Short Besebreibnag the Eeiehsroog (s)
    In the Naohfoigeu, an ocular tympanic ligament of the present invention becomes lodged under
    Reference to the be; The drawings were described in more detail. Showing: 1- lg. 1 shows the temporal course of the drive signal AS in the case of the shifter, with two subordinate dimming values which are intercepted by a period of the hft signal, in the so-called: PWM-dimming in accordance with the prior art: 7/17
    FIG. 2 is a schematic representation of a visual inspection of a soundproofing sound insulation: and FIG
    FIG. 3 shows the time profile of the transducer Aileron_Assigning_Assigned_to_the_converter_shifter, for setting different sensed values according to the method according to the invention, FIG.
    BcYomngte Aus.fltlmmg the invention
    The reference numerals denoted by reference to FIG. 1 will continue to be used in the following paragraphs, insofar as they apply to the same and the same elements or signals.
    Fig. 2 shows a schematic representation of a Auserungsbeisptel einet invention scarf tionofon wag IC . This comprises an input with a first and a second input terminals El, E2, between which a DC supply voltage liE can be applied. This can be, for example, using an oiling device on a Netzweehselspannang. The input HE E2 is coupled to the input of a transducer 12, which includes at least one schematically illustrated Wallfersehofen · ·
    The output of the transducer 12 is the output of the sound generator 10 and surrounds a first and a second output port Al, A2. Between these output terminals Ai, A2, the series connection of a multiplicity of LEDs is coupled. Of course, a large number of such series circuits would also be connected in parallel. The converter 12 comprises at least one W and I mentioned above, the Steaereleki-rode is coupled to a Anstoaervomchmmung 14, which provides at its output a signal AS to the control electrode of the at least one Wsudterschaiiem. The control device 14 is coupled to a dimming device 16 for supplying a dimming power, wherein the dimming value is correlated with the dimming. The converter 12 provides at its output an HP Sirom I0,, 5 with a, predefinable Tastverhälinis ready, the AnsCeuervorriehtung 14 is designed to zn at least for a first predetermined DimmschwellweA with increasing dimming the HC signal by superimposing a PWM signal zn that 8/17 in correlation with. the zugeiobrten Dimmweri a predetermined number of periods of the HK signal is cut out of the KE signal.
    As will be shown more clearly with reference to FIG. 3, the suggestion procedure 1.4 is only adjustment of tunings corresponding to divovers lying between a first and a second dimming value which differ from each other by at least one period of the HKS signal, upsetting the tactile rhyming of the Hb sigma during at least one period of the HKSignais, preferably during a plurality of mature periods of the HK signal.
    In the example embodiment of the present invention illustrated in FIG. 3, three periods of the HKSignais ms are each of a so-called "wedge disk". zusannnengeiasst. How rare the expert oirenslehüinh, a Zeitseheibe can also wet only one period of HKSignais or several periods nee Hf Aignais.
    Fig. 3a) shows the time course of the An control signal AS and the output current I0ii; at a dimple of 30 pli, the smallest unit of time around which the PW34 signal can be shortened or extended, corresponds to a Zeiischelbe. As can be seen in FIG. 3 a), the dead weight is about 30 Pf and is identical in all of the timeslots 1 to 5 during the on-time of the P WMA signal.
    Was one mm after the. Stand net technology continues dlmmen. thus one would shorten the on-Xeli of the PWM signal by one unit biting a time slice, as shown in Fig. 3f). However, this would already be a Dimmweri of 25%. The transition of the output of the at least one LED light when Ansteuertmg with a. Current Icsssi according to Fig. 3a.) To a Ansteuertmg according to FIG. 3t) would be registered by a user by a think life jump in the holiness ond / or the color of the light emitted by the least honor LED light,
    By contrast, Fig. 3b), in a time slice, in this case in the toe slice 5 at the end of the Ow time of the PWVV signal, the tasive hook of the HFC signal is reduced, for example by an additional 20 Pf. The resulting Ta ratio is therefore 30%. - 6% 24 Pt. The frequency of the FWM signal is at the display of. Fig. 3 400 Hz, while the frequency of HKSignais is between 60 and 150 kHz. There. the last 9/17
    Signal is generated from a 48 MHz clock, as shown in Fig. 3bj dargestelhe reduction of lAstverbälloisses the I IDDgnais by 20% completely easily possible, Feie to your yen run of the current j, ... s au is recognizable falls this slightly decreases during the time 5, whereby the desired direction is achieved.
    The illustration of FIG. 3e) differs from the representation of FIG. 3b due to the fact that in the time slice 5 the frequency of the HF signal has been reduced by a further 20 dB and is now 18%. As can be seen from the course of the current I, the latter continues to diminish it during the time slice 5. The figure in the illustration of Fig. 3e) is about 28%.
    In order to set a dimming power of 27%, according to FIG. 3d), the time delay of the HD signal is reduced during the time period 5, where 20% less. The arrival price l0:;, decreases. The duty cycle of the HD signal during the time series 5 is 12%.
    SchheBboh is set to a Dimmweris of 26 36, see Fig, 3e), the duty cycle of the HD signal during the Zeitseheibe 5 to 6%, whereby, the output current. 13 -,:;: while de If this is still the case, as already mentioned, the setting of a dimming value of 2 $% shortens the duration of the PWM signal by the duration of one time slice, see FIG. 31).
    In which. In Fig. 3, the frequency of the HD signal in the time slice in which the duty ratio has been further reduced, in the present case the time syllable $, was unchanged; As will be explained in more detail below, however, this can be both lowered and increased, for example, with regard to the converter used. as long as the integral of the on-times over the periods of the HDSignais the respective. Zeitsebelbe is smaller than the integral of the corresponding on-times before the modinkation. Also, a mere shortening of the HD insertion rate, which normally causes an increase in the HD frequency, drove; to the desired result.
    An increase in the frequency of the HD signal during the predefined periods is considered, for example, with a buck converter in the 1 kansition mode with an active retrigger, 10/17
    As Wtatdier Io consider all sorts of drivers that are in the Lago PW TL dimming drirdizuruhreu. This is indicated in the log-off DimnuBg-Zcitsekeibe, in the example of Pie. In the case of a final stage, either the contact ratio is reduced proportionally only to the desired dimen- sions (fine amide song; for gfelbbbe or lreqoonz), or the illiliate time is correspondingly reduced and allowed to undergo a change in frequency, for example before avoidance oversized rippie in the initial riser If the converter is a half-bridge with a transformer, for example, LLC, the frequency of the duty cycles will be changed, or your cyclo will be changed at the same time, and the frequency of the HBS signal will change as well and the Duty Cycles is possible in compliance with the above-mentioned condition (Integral) .The same applies to a so-called Fiyback wall len
    According to my opinion, it is not mine through ciufeeh.es .foatingA but through. "Discharge ^ of the HBSignature on the bark of the nfederBecgientcn PWVL signal. Pig. 3 shows, as an example, the time profile of the drive signal AS, which is for one; TieBetzsteller would be suitable as a converter.
    Although a reduction in 20 3C steps has been made in Pig .. 3 for better clarity, obviously taking into account the resolution of the HG signal also significantly smaller percentage changes into consideration.
    Are the Zen slices. In which the Tastvethäitrsis is further reduced, small enough, there is no vessel. overload the transducer. In Warst Ca.se the Schalttmnsisior Although her some bars in linear operation, which can also be prevented by limiting the HGEmsehahzeii down or a reduction in the frequency of HBSignais during Zcitsolteibe, 11/17
    权利要求:
    Claims (8)
    [1]
    knaprikshe 1 < Switching arrangement (10) for operating and dimming at least one LED umiss " send: - iron input with a first (El) and a second Bingangsansehinss (E2) for coupling with a Vefsorgungsglelehspanmmg (IE); A transducer (12) having at least one transducer, the transducer (12) being coupled to the input on the input side; a transducer (14) emitting the at least one transducer, the transducer (14) interfacing with a dummy driver (16) for feeding a Di mm wen ::, the Pt value being correlated with a derogation, in which the driving device is further designed to provide at its output a signal to be given with a prescribable tactile response; and · an output having a first (AI) and a second output terminal (Λ2) for coupling to the at least one LED, the inlet being coupled to the inlet of the transducer (12), the actuation device (14) being at least off In a first preformed dim level, when the dimming is to be watched, the HD signal is to be modulated by the control of a F WM signal, that in correlation with the ditnrnweri to be closed, a predetermined number of periods of the HAS signal from the HESigna! is cut out; characterized in that the proximity means (14) for adjusting dimming values corresponding to dimming values lying between a first: and a second power value, which differ at least one period of the HON signal, is the TAS behavior of the HBS signal for at least one predeterminable period of the HA signal,
    [2]
    2. Scbaitongsanordnung (10) according to claim L, characterized in that the Ansteuenminiehtang (14) is placed, when. Reducing the TasWerhättnisses also the frequency of the HASignais to modify, in particular to reduce or eo 12/17 high, wherein the: integral of ömZeiten over the at least one predetermined period of the HESignals is smaller than the integral of the On-ZeUen over the at least a predefinable period of HwSigüsds before the modification.
    [3]
    3. Schsitesogsanordntmg (10) according to claim L, characterized in that the Ansleuervoniditung (14) angekkgt at kedowewo the Tastverimiinisses the frequency of the HESignals not au. change
    [4]
    4. Circuit arrangement (Iö) according to one of the preceding claims, dadoreh gekerawekbnek that the Amsteuervomebinng (14) is based, rar setting of Dimmnngen mix a Dimmwerb which corresponds to no Dirnnrnng, and the: · first vo; As the dimming length increases, so the diminishing value of the HASignal zonch- neneni na decreases. Scarf umgaanordnang (10) according to any one of the preceding claims, characterized in that the Anstenervnrrichiung (14) is designed to reduce the Tssiveriiälinis the Hobignals warnable predeterminable periods of HASigaais za, wherein the predetermined periods of the HESignals between 0.2% and KE4 preferred 1% to speak a period of PWA signing,
    [5]
    6, Schaitnngsanooinang i 10) according to any one of the preceding claims, dadrneb characterized in that the at least one predeterminable period of the Hb signal at the end of the Om toe of the PwM signal are arranged,
    [6]
    7, Sehaltnngsanordnang (10) after, one of the preceding; Claims, characterized in that the ikeqnanz of the HASignals is between 60 and 1 SC) kHz. 13/17
    [7]
    8. Sdisdiügsarmtdnung (10) according to any one of the preceding claims, characterized in that the frequency of the PWEE signal between 100 Hs and 20 kHz. preferably 400 Ha, amount:.
    [8]
    9. Method for Operating and Dimming, at Least One LED on a SvehahungsanouE nnng HE) inappropriately an input with a first (El) and a second Elngangsan-castle (E2) meaning doubling with a Yersorgirngsgleiehspannung (Ua): a converter (12) with at least one Wandbrschslter, wherein the transducer (12) on the input side gekngneli with the input Is; an actuation device (14) for the at least one transducer, wherein the actuation device (14) interfaces with a device (16) for calculating a dimming value, the value of which is correlated to a value determined by the anaeradication Initially, a 1 fESignaf beaehzasteiien with a pre-negotiable duty cycle; and an inlet with a first (AI) and a second outlet sewer (A2) zmn Koppein with the at least one LED, wherein, the beginning mb the. Output of the converter (i 2.1 is coupled), wherein, starting from a first predeterminable signal, the H (· signal) superimposition of a PWM signal is modified in such a way that, in correlation with the added dimming value, an eofgebbare number of periods, the HESignals characterized by a raging further step: for impressing signals corresponding to dinamines lying between a first and a second dimming value which differ from each other by at least one period of the dc signal, the duty cycle of the HES signal becomes at least one previous period of the HESignal is reduced 14/17
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    同族专利:
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    DE102013210581A1|2014-12-11|
    AT514354B1|2018-02-15|
    US9681505B2|2017-06-13|
    CN104244509B|2018-04-20|
    AT514354A3|2016-10-15|
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    DE102013210581B4|2015-01-08|
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    申请号 | 申请日 | 专利标题
    DE102013210581.9A|DE102013210581B4|2013-06-06|2013-06-06|Circuit arrangement and method for operating and dimming at least one LED|
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