WO2016058585A1 - Circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes ainsi que moyen d'éclairage et appareil d'éclairage - Google Patents

Circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes ainsi que moyen d'éclairage et appareil d'éclairage Download PDF

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Publication number
WO2016058585A1
WO2016058585A1 PCT/DE2015/100358 DE2015100358W WO2016058585A1 WO 2016058585 A1 WO2016058585 A1 WO 2016058585A1 DE 2015100358 W DE2015100358 W DE 2015100358W WO 2016058585 A1 WO2016058585 A1 WO 2016058585A1
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WO
WIPO (PCT)
Prior art keywords
voltage
circuit
led
source
current
Prior art date
Application number
PCT/DE2015/100358
Other languages
German (de)
English (en)
Inventor
Uwe Wiesner
Norbert Wittschief
Original Assignee
Atlas Elektronik Gmbh
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 Atlas Elektronik Gmbh filed Critical Atlas Elektronik Gmbh
Priority to EP15781860.0A priority Critical patent/EP3207767B1/fr
Publication of WO2016058585A1 publication Critical patent/WO2016058585A1/fr

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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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices

Definitions

  • the invention relates to a circuit for low-fl ash operation of light-emitting diodes, wherein the circuit n LED chains with a respective atomic number N, where n is integer and greater than 1 and N is integer and greater than 0, a total supply voltage terminal at which a time-dependent Supply voltage, in particular rectified AC voltage, can be applied, and has an LED chain circuit and the LED chain circuit is set up such that the individual LED chains connected with increasing supply voltage with increasing atomic number N and switched off with decreasing supply voltage with decreasing atomic number , as well as a bulb and a light.
  • LED light emitting diode
  • the mains-side AC voltage is rectified in general and individual LED chains are controlled.
  • the LED chains are not connected over approx. 50 °. Only over the phase angle of about 130 °, at least one or more LED chains are connected, so that during this Time the switched LEDs emit a light signal. This means that about 28% of the time the light emitting diodes do not emit light.
  • the object of the invention is to improve the state of the art.
  • the object is achieved by a circuit for flicker-poor operation of light-emitting diodes, wherein the circuit n LED chains with a respective atomic number N, where the n is integer and greater than 1 and the N is integer and greater than 0, a total supply voltage terminal, on which a time-dependent supply ⁇ voltage, in particular rectified AC voltage, can be applied, and has an LED chain circuit and the LED chain wiring is set up such that the individual LED chains connected with increasing supply voltage with increasing atomic number N and with decreasing Supply voltage can be switched off with decreasing atomic number, wherein the total supply voltage terminal is associated with a current storage source, which is arranged such that at a supply start voltage the power storage source is charged and at ariesseinsat z voltage, the power storage source at least one of the LED chains, in particular the entire LED chain with atomic number 1 and thus with most LEDs, a supply current impresses, so that this LED chain is connected.
  • a current storage source which is arranged such that at a supply start voltage the power storage source is
  • At least one LED chain or a part of an LED chain can be switched over the dark phases so that they emit a light signal through the individual LEDs during this time.
  • a viewer perceives the perhaps still resulting differences in brightness as extremely low and can not visually or at least barely perceive it with his or her eye.
  • the lighting that is implemented with the present circuit is perceived by people to be very pleasant and also makes it possible to work over a whole working day.
  • it can be at least ruled out that due to the lighting it comes to an excessive fatigue of the eyes.
  • the "circuit” is in particular an electronic circuit which is designed on a corresponding board with corresponding components, but also free-wired lines and components can implement the circuit.
  • flicker-poor operation is understood to mean, in particular, that complete darkness of all LEDs is excluded or reduced for a corresponding time, In particular, the term flicker-poor also encompasses the term flicker-free, although differences in brightness may continue to exist, but essentially one continuous lighting is given.
  • LED light emitting diode
  • the "LED chains” generally comprise several light-emitting diodes. If previously LED chains with multiple light-emitting diodes are used, individual diodes, which are controlled accordingly, are referred to as an LED chain, for example one of the LED chains be formed by one or more Zener diodes (zener diodes).
  • the "n” indicates the number of LED strings, and usually between 2 and 10 LED strings, and more preferably between 4 and 6 LED strings are used, and the ordinal number "N" numbers the individual strings.
  • each individual LED chain with indication of the ordinal number N can be uniquely determined.
  • the "total supply voltage connection” is formed in particular by a connecting line, which both the single LED chain and the power storage source (direct or indirect) supplied.
  • a rectified AC voltage with 230V rms can be impressed in this total voltage supply connection. In the present case, this means that generally rectified sinusoidal half-waves occur at the total supply voltage connection
  • time-dependent supply voltage is understood to mean, in particular, voltages in which the voltage value changes as a function of time or according to a phase angle. ⁇ br/> ⁇ br/> [0008] Due to the fact that the latter is rectified, especially with an alternating voltage, a time-dependent direct voltage is then present in particular.
  • the "current storage source” is in particular a circuit or a circuit part which is charged in particular at a “supply start voltage” and which impresses a current of at least one of the LED chains starting from a “supply supply voltage.”
  • a current storage source comprises both one
  • This current storage source is arranged in particular "in front of” the LED chains, so that - depending on the wiring of the LED chains - even several or even all LEDs can be supplied by the power storage source.
  • the LED chain with the atomic number N more LEDs than the LED chain with the atomic number N + l.
  • the power storage source To be able to impose a time-dependent DC voltage both the power storage source and an LED chain or multiple LED chains, the
  • Total supply voltage terminal a rectifier ⁇ circuit, in particular a Graet z-bridge circuit, which converts an AC voltage into a DC voltage.
  • DC voltage understood a voltage that does not change their polarity.
  • an alternating voltage is in particular a voltage at which the polarity changes.
  • Both AC voltage and DC voltage have different voltage values, in particular at different times (phase angles).
  • the power storage source has an input branch with an input diode and an input power source and an output branch with an output diode and an output power source.
  • the diodes are arranged oppositely, so that substantially either the input power source to a memory device impose a current or the output current source of one of the LED chains can impose a current.
  • Both the input power source and the output power source may have an ohmic resistance, to which a voltage is applied, so that there is a corresponding current flow when the voltage is applied.
  • the input power source or the output power source or the input power source and the output power source may be one
  • Controllable in this context means in particular that the time at which the input current source or the output current source assumes its function as a current source is determined by the applied supply voltage and its phase angle.
  • a "constant current source” is to be understood in particular as meaning a component which, at least over a certain period of time, provides a substantially non-changing current.
  • the self-conducting N-channel FETs cause in this embodiment, that the voltage across the associated resistor is constant, whereby the resistor essentially causes a constant current flow.
  • Controllable in this context should be understood in particular as a time-dependent or correspondingly voltage-dependent / phase-dependent control and thus as switching on and / or off of the constant current source.
  • the current storage source may comprise a capacitor which can serve both as a storage medium and as a source medium.
  • the capacitor serves in particular as a source medium and emits charge carriers per time.
  • the power storage source includes a modified valley-fill circuit.
  • valley-fill circuits are used as passive power factor correction filters to filter unwanted harmonics in electrical power supplies. For this purpose, they have in particular a rectifier.
  • the present modified valley-fill circuit essentially corresponds to the usual valley-fill circuit without a rectifier.
  • the circuit In order for the circuit to emit light for illumination, the circuit has an applied voltage supply which impresses the time-dependent supply voltage of the circuit. [35] In a further aspect of the invention, the object is achieved by a luminous means which has a previously described circuit.
  • the object is achieved by a luminaire, in particular street lighting system, indoor
  • Lighting system parking garage lighting or
  • Lighting systems for corridors, hotels, aircraft and ships which has a previously described light source or a corresponding circuit described above.
  • FIG. 1 shows a schematic representation of a circuit according to the invention with 5 LED chains and an equivalent circuit diagram of a current storage source
  • FIG. 2 shows a voltage curve of a half-period from 0 ° to 180 ° for the individual voltages and currents of the circuit from FIG. 1,
  • Figure 3a is a schematic representation of a simple implementation of
  • Figure 3b is a schematic representation of a
  • Figure 3c is a schematic representation of a
  • An LED circuit 101 includes a Graetz bridge circuit 103 at the output thereof
  • Supply line 107 is arranged.
  • the supply line 107 conducts a voltage or sets a potential relative to the ground so that the LED chains 121, 123, 125, 127, 129 are operable.
  • a current storage source which is shown as an equivalent circuit diagram 111, is arranged on the supply line 107.
  • the supply voltage 105 is present as an AC voltage with 230V eff .
  • the current storage source 111 comprises two parallel branches which are connected to the supply line 107 on the one hand and to the other via the capacitor 119 are connected to ground. Each of the branches has a blocking diode 113. In the first branch, a first current source 115 and second branch, a second current source 117 is arranged. The two blocking diodes 113 are switched in opposite directions.
  • the first LED chain 121 is the switchable current source 131, the second LED chain 123, the switchable current source 133, the third LED chain 125, the switchable current source 137, the fourth LED chain 127, the switchable current source 139 and the Z Diode 129 associated with the switchable current source 141.
  • the individual switchable current sources 131, 133, 137, 139, 141 are switched.
  • the individual switchable current sources 131, 133, 137, 139, 141 are switched depending on the phase angle.
  • This circuit is realized for example with a block CL8800 (Sequential Linear LED Driver) from Supertex® Inc.
  • the switchable current source 131 With increasing voltage and increasing phase angle first the switchable current source 131, then the switchable current source 133, then the switchable current source 137 and finally the switchable current source 139 is turned off, so that only the switchable current source 141 is connected to ground by the phase angle of 90 °.
  • the switchable current source 131 is interrupted and the switchable current source 133 is switched through as the only switchable current source, so that a sufficient voltage is applied both to the first LED chain 121 and to the second LED chain 123 and therefore additionally the second LED chain 123 is illuminated.
  • the switchable current source 133 generates a current such that the voltage across the first LED string 121 and the second LED string 123 is constant. This is continued accordingly with further increasing supply voltage for the further LED chains, so that in each case only one of the switchable current sources 131, 133, 135, 137, 139, 141 is connected to ground in succession and the corresponding LED chains are connected.
  • the currents flowing through the LED are also shown in the diagram of FIG. 2 and designated by reference numeral 205.
  • the step shape of the current profile 205 is achieved in particular by the design of the switchable current sources 131, 133, 135, 137, 139, 141.
  • the blocking diode connected to the second current source 117 is now switched in the forward direction, so that the voltage applied to the capacitor 119 at the second current source 117 generates a current (209), which is passed through the diode associated with the second current source 117.
  • This current (209) is impressed, in particular, on the first LED chain 121 and conducted to ground via the switchable current source 131, which is then closed in this case.
  • the light-emitting diodes of the first LED chain 121 light up, although the voltage actually applied to the supply line 107 may not be sufficient for the operation of the first LED chain (see voltage curve 203).
  • the first current source 115 and / or the second current source 117 are formed as an ohmic resistor 301. Every other ohm, specific resistance, or each part that forms an ohmic resistance, such as a bipolar transistor, can take over this function in the present case.
  • the first current source 115 and second current source 117 may be configured as constant current sources.
  • the first current source 115 and the second current source 117 comprise a self-conducting N-channel FET. These FETs conduct in the unconnected state between drain and source. By arranged after the resistance feedback to the gate, a constant voltage can be generated at the associated resistor over a wide voltage range, this in turn leads to a constant current flow. This current flow is firstly used to charge the capacitor 119, or the capacitor supplies the second current source 117 with its voltage.
  • the capacitors 305 connected in parallel with the respective resistor serve, in particular, to suppress or avoid oscillating oscillation due to the feedback.
  • the first current source 115 and the second current source 117 are formed as a kind of constant current sources.
  • a modified valley-fill circuit 311 is assigned to the first current source 115 and the second current source 117.
  • the first current source 115 and the second current source 117 may be configured as described above.
  • the first current source 115 charges the first capacitor 313 and the first capacitor 313 Capacitor 315.
  • the capacitors 313, 315 are connected in series.
  • the first current source 115 is switched off and the second current source 117 is supplied via the capacitors 313, 315, which are now connected in parallel, so that, in turn, it imposes a current on the LED chains.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes. Le circuit comporte : n chaînes de DEL ayant chacune un nombre ordinal N, n étant un entier supérieur à 1 tandis que N est un entier supérieur à 0 ; un branchement de tension d'alimentation générale, auquel on peut raccorder une tension d'alimentation dépendante du temps, en particulier une tension alternative redressée ; et un circuit de connexion des chaînes de DEL. Le circuit de connexion des chaînes de DEL est mis au point de telle manière que les différentes chaînes de DEL sont connectées à une tension d'alimentation croissante avec le nombre ordinal N croissant et sont déconnectées avec une tension d'alimentation décroissante avec le nombre ordinal décroissant. Au branchement de tension d'alimentation générale est associée une source d'accumulation de courant, qui est mise au point de telle manière que, à une tension d'alimentation initiale, la source de réserve de courant est chargée et que, à une tension d'alimentation de service, la source d'accumulation de courant d'une des chaînes de DEL impose un courant d'alimentation de sorte que cette chaîne de DEL est connectée.
PCT/DE2015/100358 2014-10-14 2015-08-28 Circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes ainsi que moyen d'éclairage et appareil d'éclairage WO2016058585A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15781860.0A EP3207767B1 (fr) 2014-10-14 2015-08-28 Circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes ainsi que moyen d'éclairage et appareil d'éclairage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014114853.3 2014-10-14
DE102014114853.3A DE102014114853A1 (de) 2014-10-14 2014-10-14 Schaltung zum flackerarmen Betreiben von Leuchtdioden, sowie Leuchtmittel und Leuchte

Publications (1)

Publication Number Publication Date
WO2016058585A1 true WO2016058585A1 (fr) 2016-04-21

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PCT/DE2015/100358 WO2016058585A1 (fr) 2014-10-14 2015-08-28 Circuit servant à faire fonctionner sans scintillements des diodes électroluminescentes ainsi que moyen d'éclairage et appareil d'éclairage

Country Status (3)

Country Link
EP (1) EP3207767B1 (fr)
DE (1) DE102014114853A1 (fr)
WO (1) WO2016058585A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109979132A (zh) * 2017-12-27 2019-07-05 航天信息股份有限公司 一种单报警灯表示多设备报警状态的方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006035075A1 (de) * 2006-07-28 2008-01-31 Infineon Technologies Ag Schaltungsanordnung mit einer Umschaltvorrichtung und Verfahren zum Betreiben einer Schaltungsanordnung
US20120081009A1 (en) * 2009-06-04 2012-04-05 Exclara Inc. Apparatus, Method and System for Providing AC Line Power to Lighting Devices
EP2683220A1 (fr) * 2012-07-04 2014-01-08 Zentrum Mikroelektronik Dresden AG Dispositif et procédé destinés à la commande de diodes lumineuses dépendant de l'amplitude de la tension alimentaire, en utilisant commutateurs de dérivation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003931A1 (de) * 2011-02-10 2012-08-16 Osram Ag Ansteuerung mehrerer in Reihe geschalteter Leuchtmittel
US9131571B2 (en) * 2012-09-14 2015-09-08 Cree, Inc. Solid-state lighting apparatus and methods using energy storage with segment control
KR102132665B1 (ko) * 2013-03-21 2020-07-21 서울반도체 주식회사 이중 브리지 다이오드를 이용한 led 구동회로, 이를 포함하는 led 조명장치

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006035075A1 (de) * 2006-07-28 2008-01-31 Infineon Technologies Ag Schaltungsanordnung mit einer Umschaltvorrichtung und Verfahren zum Betreiben einer Schaltungsanordnung
US20120081009A1 (en) * 2009-06-04 2012-04-05 Exclara Inc. Apparatus, Method and System for Providing AC Line Power to Lighting Devices
EP2683220A1 (fr) * 2012-07-04 2014-01-08 Zentrum Mikroelektronik Dresden AG Dispositif et procédé destinés à la commande de diodes lumineuses dépendant de l'amplitude de la tension alimentaire, en utilisant commutateurs de dérivation

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Publication number Publication date
EP3207767B1 (fr) 2019-03-06
EP3207767A1 (fr) 2017-08-23
DE102014114853A1 (de) 2016-04-14

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