WO2011069176A1 - Treiberschaltung für eine led - Google Patents
Treiberschaltung für eine led Download PDFInfo
- Publication number
- WO2011069176A1 WO2011069176A1 PCT/AT2010/000468 AT2010000468W WO2011069176A1 WO 2011069176 A1 WO2011069176 A1 WO 2011069176A1 AT 2010000468 W AT2010000468 W AT 2010000468W WO 2011069176 A1 WO2011069176 A1 WO 2011069176A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- driver circuit
- led
- circuit
- switch
- capacitive coupling
- 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.)
- Ceased
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
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
Definitions
- the invention relates to a driver circuit for an LED according to the preamble of patent claim 1 and a method for driving an LED according to the preamble of
- TECHNICAL FIELD Such driver circuits are used in lighting systems in order to achieve a colored or flat illumination of rooms, paths or escape routes.
- organic or inorganic light emitting diodes LED are used as the light source.
- light emitting diodes are increasingly being used as the light source for illumination.
- the efficiency and luminous efficacy of light-emitting diodes is being increased more and more so that they are already being used in various general lighting applications.
- light emitting diodes are point sources of light and emit highly concentrated light.
- Patent claim 1 Particularly advantageous embodiments of the invention are described in the subclaims.
- the solution according to the invention for a device for operating LEDs is based on the idea that a driver circuit for an LED. a terminal for a mains voltage, a filter circuit and a rectifier, an inductance and a switch. The inductor is magnetized when the switch is closed and the inductor becomes
- the solution according to the invention relates to a driver circuit for an LED, comprising a connection for a mains voltage, a rectifier and a filter circuit,
- a buffer element an inductance and at least one switch, wherein the inductance is up-demagnetized by high-frequency clocking of the switch and the inductance feeds the LED, the switch by a
- Control circuit is driven, wherein the control circuit is coupled to a sensor device, and the
- Sensor device allows a non-contact control of the brightness and the color of the driver circuit.
- the solution according to the invention also relates to a method for driving an LED, wherein the LED via a
- a non-contact control of the brightness and the color of the LED is made possible by means of appropriate control via the driver circuit.
- the non-contact control can be achieved by an evaluation of a capacitive
- Coupling can change the brightness and color of the LED
- the solution according to the invention also relates to a light source for an LED, with a base for use of the light bulb in a commercial lamp base, comprising a
- Driver circuit according to the invention are formed. In this way, it is possible to achieve a very consistent and uniform illumination of a surface by a light source with light-emitting diodes, which is controllable in a simple manner in the brightness and color. Description of the preferred embodiments
- the invention is based on the attached
- Fig. 1 shows a first embodiment of a device according to the invention
- Fig. 2 shows a second embodiment of a device according to the invention
- 3 and 4 show further embodiments of a
- FIG. 5 shows a further embodiment of a
- the invention is based on a first
- Embodiment of FIG. 1 explained with a driver circuit for an LED.
- the driver circuit for an LED has a connection for a mains voltage, a filter circuit and a
- Rectifier an inductor and a switch on.
- the inductor is magnetized when the switch is closed, and the inductor is demagnetized when the switch is opened, and at least during the demagnetization phase, the current is fed through the inductor
- the switch Sl is preferably only opened when the current through the switch Sl has reached a predetermined threshold.
- the current through the switch Sl can be detected by means of a current detection Ip (for example, a current shunt).
- the switch-off duration of the switch S1 may depend on the detected amplitude of the current through the LED.
- the switch-off of the switch Sl can from the
- the inductance (L2) can feed a smoothing circuit (C2) during its demagnetization.
- the inductance (L2) may have a secondary winding.
- the clocked inductor L2 of the driver circuit has a secondary winding L2s which is magnetically coupled to the primary winding L2p of the inductor L2.
- the driver circuit can be used as isolated flyback converter
- the driver circuit can also be designed as a resonant and isolated half-bridge converter having two controllable switches Sl and S2.
- a driver circuit for an LED having a connection for a mains voltage, a
- Rectifier GR1
- filter circuit LI
- Latching element an inductance (L2) and at least one switch (Sl, S2), wherein the inductance (L2) by high-frequency clocking of the switch (Sl, S2) up and
- the control circuit (Ul) is coupled to a sensor device (SV), and the sensor device (SV) allows non-contact control of the brightness and / or the color by means of the driver circuit.
- the contactless control of the sensor device (SV) can be done by an evaluation of a capacitive coupling and depending on the capacitive coupling the brightness of the driver circuit by changing the drive signal of the
- Switch (Sl, S2) be adjustable by the control circuit.
- the capacitive coupling can be done by a hand movement, preferably in the vicinity of the driver circuit or the LED light.
- the sensor device (SV) may have a first capacity
- Coupling (to change the brightness) can change.
- the sensor device (SV) evaluates the capacitive coupling based on a comparison measurement between the first capacitance and a reference capacitance.
- the sensor device (SV), the capacitive coupling depending on the comparison measurement between the first and the second
- Capacitance and a reference capacitance output an evaluation signal, which is evaluated by the control circuit (Ul).
- control circuit (U1) can change the frequency and / or the duty cycle when the switch (S1, S2) is actuated.
- the sensor device (SV) can by means of the evaluation of the capacitive coupling a (detected)
- the detected hand movement can be evaluated in terms of their duration and this period can be evaluated as information for the desired change in the brightness of the LED.
- the detected hand movement can be evaluated in terms of its intensity (the movement) and this intensity can be evaluated as information for the desired change in the brightness of the LED.
- the detected hand movement can alternatively or additionally be evaluated as information for the desired change in the color of the LED.
- the change of color can also mean a change in the color temperature or the color location.
- a light source for an LED can be constructed, with a base for the use of the light source in a
- the non-contact control of the sensor device (SV) and thus the LED has the advantage that no contact of a control element such as a touch panel is necessary.
- This has the advantage that, on the one hand, the user can directly drive the LED light source without running the risk of having to touch a hot light source, moreover, the integration of the sensor device (SV) into the light source eliminates the need for external controls.
- Non-contact control can also be used to specify or change configuration settings.
- the non-contact control can also be used for address assignment, in that the illuminant is then assigned an address in an addressing mode when a non-contact control is detected there.
- the recorded configuration settings can be stored in a memory and thus permanently for a
- certain scenes are set, which can then be retrieved later by a corresponding hand movement.
- the scenes can be set in several steps and thus by relatively complicated hand movements, while the later scene call can be performed by a specific scene
- SV sensor device
- the non-contact control can be done by an evaluation of a capacitive coupling and depending on the
- capacitive coupling the brightness and / or color by means of the driver circuit be adjustable.
- the switch Sl can be controlled, for example, by an integrated circuit for a power factor correction.
- the monitoring circuit U1 may include a power factor correction control circuit.
- the inductance L2 may be a transformer L2p, L2s, which serves as a potential-separating member.
- the primary winding L2p of the transformer is connected in series with the switch Sl. The magnetically attached to the
- Primary winding L2p coupled secondary winding L2s is connected to a rectifier (D2) and a smoothing circuit (C2) to which the LEDs can be connected.
- Transformer can be formed by a diode D2 or by a full-wave rectifier.
- Embodiments of FIG. 2, Fig. 3, Fig. 4 and Fig. 5 explained with an extended driver circuit for an LED.
- a grid-connected control can be effected by means of a dimmer.
- the driver circuit has a connection for one
- Filter circuit LI and a latch element follow. This is followed by an inductance L2 and a switch S1.
- the inductance L2 is magnetized when the switch Sl is closed, and the inductance L2 is demagnetized when the switch Sl is opened, and at least during the demagnetization phase, the current flows through the
- the driver circuit can be constructed as a boost converter circuit or as a flyback converter circuit.
- the flyback converter circuit or the boost converter circuit is designed to be isolated, ie, the clocked inductance L2 of the driver circuit has a secondary winding L2s, which is magnetically coupled to the primary winding L2p of the inductance L2.
- a current detector preferably a unidirectional one
- Decoupling is included between the rectifier GR1 and the buffer element Cl.
- the decoupling element can be formed as a current detector by means of a diode D1.
- a full-wave rectifier DV1 is also possible to use as decoupling element.
- At the output of the rectifier GR1 is a
- a bypass circuit (R40, Q4) is always activated when a current flows into the driver circuit for an LED.
- a current in the driver circuit for an LED always flows when a current flows through the rectifier GR1 via the inductance L2 and the switch S1 or into the intermediate storage element.
- the decoupling member thus acts as a current detector.
- Monitoring circuit Ul may be, for example, an integrated circuit.
- the monitoring circuit U1 can activate or deactivate the bypass circuit (R40, Q4) as a current detector depending on the monitoring of the decoupling element.
- the monitoring circuit Ul for example, only the voltage before the decoupling or the voltage difference across the decoupling (preferably by one each
- the monitoring circuit U1 can also control the switch S1.
- the decoupling element as a current detector can be formed by a diode D1.
- a diode D1 a full-wave rectifier DV1 as decoupling element.
- the driver circuit may be connected to a commercially available dimmer, and the bypass circuit (R40, Q4) may be activated during phases in which the dimmer cuts off a portion of the phase to provide residual current through the bypass circuit (R40, Q4) and the inductor L2 and to guide the switch Sl and thus to load the dimmer.
- the cache element can be filled by a valley
- the switch Sl can be switched on whenever a demagnetization of the inductance L2 is detected. However, switching on can only be done at
- Degaussing time and restarting can also be a certain period of time.
- the switch Sl can be controlled, for example, by an integrated circuit for a power factor correction.
- the monitoring circuit U1 may include a power factor correction control circuit.
- the inductance L2 may be a transformer L2p, L2s, which serves as a potential-separating member. It is the
- Transformer can be formed by a diode D2 or by a full-wave rectifier.
- the on and / or off duration of the switch Sl may be dependent on the detected amplitude of the current through the LED. Preferably, however, the switch-on and / or switch-off duration of the switch S1 does not decrease to zero or close to zero. In a simple variant, for example, a limitation of the current through the LED by limiting the
- the inductance L2 can in their demagnetization a
- Smoothing circuit (C2) this smoothing circuit (C2) may be, for example, a capacitor C2 or an LC or CLC filter.
- the bypass circuit (R40, Q4) can be replaced by a
- Resistor R40 be formed in series with a switch Q4.
- the bypass circuit can also as
- Bridging circuit have a power source (constant current source).
- a power source constant current source
- Fig. 4. 4 (Constant current source) is shown in Fig. 4. 4, only a section of the driver circuit according to the invention for a light source is shown.
- the current detector is formed here by current monitoring element R34. Depending on the current flow through the
- the bypass circuit is deactivated.
- the flow of current through the current monitor R34 is the current flowing across the
- the monitoring circuit U1 is constructed discretely, but it can also be designed as an integrated circuit, as in the examples of FIGS. 2 and 3.
- an integrated circuit When using an integrated circuit as
- Monitoring circuit Ul further functions such as the control of the switch Sl can be integrated with.
- the bypass circuit is shown in FIG. 4 by a
- the current source (constant current source) is formed in detail by the transistors Q4 and Q6 and the resistors R40, R27 and R29.
- the bypass circuit can be connected via a full-wave rectifier D3 via the filter circuit
- the rectifier via which the bypass circuit (R40, Q4) is connected to the mains voltage connection, can either be the same rectifier, through which a current into the inductance and the switch or the
- a method of driving an LED is enabled, wherein the LED is driven via a driver circuit, and the driver circuit is fed from a terminal for a mains voltage via a filter circuit (LI) and a rectifier (GR1), and the driver circuit
- Rectifier (GR1) present bypass circuit R40, Q4 is deactivated when a current flows through the rectifier (GR1) in driver circuit.
- a light source for an LED can be constructed, with a base for the use of the light source in a
- Fig. 5 is a further drive option for a
- the driver circuit can be connected to a commercial dimmer, and the switch Sl can during the
- the switch Sl can be turned on whenever a demagnetization of the inductance is detected. However, switching on can always take place only with demagnetized inductance, between the time of
- Degaussing and restarting can also be a certain amount of time.
- the inductor may be a transformer, which as
- the predetermined threshold may depend on the current amplitude of the supply voltage. In a simple variant, for example, if the supply voltage exceeds a certain value, an increase of the threshold value can take place.
- the inductance can in their demagnetization a
- this smoothing circuit may be, for example, a capacitor or an LC or CLC filter.
- an activatable bypass circuit may be present, which is activated only when sufficient current flow is detected via the current detector. In this way, the bypass circuit can be designed to produce little additional loss in its activation.
- the embodiment of FIG. 1 can also be combined with those of FIGS. 2 to 5.
- Inductance L2 and a switch Sl are formed, which can be transmitted through high-frequency clocking of the switch Sl energy via the inductance to the light source, and at the output of the rectifier GR1 can
- Bridging circuit (R40, Q4) is present, which is activated when the lamp (LED) is not in operation. This may be the case, for example, when no mains voltage is applied.
- the bridging circuit (R40, Q4) can thus be designed so that it is only deactivated when a
- Mains isolators can be achieved.
- bypass circuit R40, Q4
- the bypass circuit can be deactivated during operation of the lamp only in the phases when a current flow through the current detector
- Embodiment according to FIG. 1 are supplemented.
- the lighting means may also be a gas discharge lamp. It can thus be formed according to the invention, a light source for an LED, with a base for use of the light source in a commercial lamp base, comprising a driver circuit according to the invention.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112010004692T DE112010004692A5 (de) | 2009-12-07 | 2010-12-07 | Treiberschaltung für eine led |
| EP10807425.3A EP2510750B1 (de) | 2009-12-07 | 2010-12-07 | Treiberschaltung für eine led |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1941/2009 | 2009-12-07 | ||
| AT19412009 | 2009-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011069176A1 true WO2011069176A1 (de) | 2011-06-16 |
Family
ID=43797939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT2010/000468 Ceased WO2011069176A1 (de) | 2009-12-07 | 2010-12-07 | Treiberschaltung für eine led |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2510750B1 (de) |
| DE (1) | DE112010004692A5 (de) |
| WO (1) | WO2011069176A1 (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614937A (en) * | 1982-01-29 | 1986-09-30 | Commissariat A L'energie Atomique | Capacitive keyboard structure |
| DE10239449A1 (de) * | 2002-02-06 | 2003-08-07 | Ulrich Kuipers | Verfahren und Vorrichtung zur Realisierung von LED-Leuchten mit Farb- und/oder Helligkeitseinstellung und dem dazugehörigen Bedienelement |
| DE102006025597A1 (de) * | 2006-06-01 | 2007-12-13 | Schrödinger, Karl, Dr. | Anordnung zur Ansteuerung von Leuchtdioden |
| EP1871144A1 (de) * | 2006-06-22 | 2007-12-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | LED-Ansteuereinrichtung und entsprechendes Verfahren |
| US20080297487A1 (en) * | 2007-01-03 | 2008-12-04 | Apple Inc. | Display integrated photodiode matrix |
| US20090200967A1 (en) * | 2006-03-13 | 2009-08-13 | Koninklijke Philips Electronics N V | Control device for controlling the hue of light emitted from a light source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070008726A1 (en) * | 2003-09-02 | 2007-01-11 | Brown Richard D | Lighting apparatus with proximity sensor |
-
2010
- 2010-12-07 DE DE112010004692T patent/DE112010004692A5/de not_active Withdrawn
- 2010-12-07 WO PCT/AT2010/000468 patent/WO2011069176A1/de not_active Ceased
- 2010-12-07 EP EP10807425.3A patent/EP2510750B1/de not_active Not-in-force
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614937A (en) * | 1982-01-29 | 1986-09-30 | Commissariat A L'energie Atomique | Capacitive keyboard structure |
| DE10239449A1 (de) * | 2002-02-06 | 2003-08-07 | Ulrich Kuipers | Verfahren und Vorrichtung zur Realisierung von LED-Leuchten mit Farb- und/oder Helligkeitseinstellung und dem dazugehörigen Bedienelement |
| US20090200967A1 (en) * | 2006-03-13 | 2009-08-13 | Koninklijke Philips Electronics N V | Control device for controlling the hue of light emitted from a light source |
| DE102006025597A1 (de) * | 2006-06-01 | 2007-12-13 | Schrödinger, Karl, Dr. | Anordnung zur Ansteuerung von Leuchtdioden |
| EP1871144A1 (de) * | 2006-06-22 | 2007-12-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | LED-Ansteuereinrichtung und entsprechendes Verfahren |
| US20080297487A1 (en) * | 2007-01-03 | 2008-12-04 | Apple Inc. | Display integrated photodiode matrix |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112010004692A5 (de) | 2012-10-31 |
| EP2510750A1 (de) | 2012-10-17 |
| EP2510750B1 (de) | 2017-10-04 |
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