• 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:
    Light Emitting Diodes (LEDs) are an interesting option in lighting technology. Turning on the transistor causes a current flow from the input voltage source (U) to flow across the primary winding (N1) of the transformer. This stream consists of two components. On the one hand, one builds up according to the secondary current caused by the load consisting of the diodes (D1b) to (Dmb) and the inductance (L), and on the other hand, superimposed by the main inductance of the transformer (T), magnetizing current. If the active switch (S) then switches off, the energy stored in the coil (L) is reduced via the diodes (D1a) to (Dna) and the diodes (D1b) to (Dmb). The transformer (T) can over the diodes (D1a) to (Dna) free running. Depending on the required brightness, after the demagnetization of the transformer (T), the active switch can be switched on again immediately or a correspondingly long dead time can be inserted. The actuator can also be performed with a voltage-reducing, or with a voltage-setting autotransformer.
    公开号:AT511990A1
    申请号:T1387/2011
    申请日:2011-09-27
    公开日:2013-04-15
    发明作者:Felix Dipl Ing Dr Himmelstoss；Helmut Votzi
    申请人:Fachhochschule Technikum Wien；
    IPC主号:
    专利说明:

    Actuator for controlling light-emitting diodes
    The invention relates to an actuator for driving light emitting diodes, comprising a transformer (T) with at least one secondary winding (N2), wherein the primary winding (NI) of the transformer (T) in series with an active switch (S) is connected to and this series circuit, the input voltage (U) is connected, diodes and light emitting diodes (Dia, ..Dma, Dlb, ... Dnb) and a coil (L), or an actuator for controlling light emitting diodes, consisting of an autotransformer (T ) consisting of two series-connected, magnetically coupled windings or two partial windings with tap (NI, N2), these being connected in series with an active switch (S) and connected to this series circuit the input voltage (U), diodes and LEDs (Dia, ..Dma, Dlb, ... Dnb) and a coil (L), or an actuator for controlling light-emitting diodes, consisting of an autotransformer (T) consisting of two in Series connected, magnetically coupled windings or two tapped partial windings (NI, N2), these windings being connected in series with an active switch (S) and the negative terminal of the input voltage (U) being connected to the negative terminal of the active switch, Diodes and LEDs (Dia, ..Dma, Dlb, ,,, Dnb) and a coil (L).
    Light-emitting diodes (LEDs) are an interesting option in lighting technology. As semiconductor elements, they have a long service life, high efficiency and low operating temperature. It is controlled by power electronic converters, which are usually operated in a current-limited or current-controlled manner. Dimming can be done by reducing the operating current or by pulsing. Pulsation has the advantage that the LED is operated optimally in the short term. Due to the high-frequency clocking it comes to a uniform light impression.
    In the following some possibilities for heart rate regulators are discussed.
    The invention will be explained with reference to the figures. FIG. 1 shows the basic structure, FIG. 2 a simplification, FIG. 3 and FIG. 4 modifications with an autotransformer (two galvanically connected, magnetically coupled windings).
    FIG. 1 shows the basic idea. The active switch (S), drawn by way of example as a MOSFET, is driven via a driver stage (not shown). It makes sense to perform the shutdown at a given current. It is suitable for easy control in 1 T17 / fh / 20110926
    Dependence on the supply voltage. Thus, e.g. The duty cycle can be varied according to the input voltage and the lighting can be changed (dimmed) using the refresh rate. Turning on the transistor, a current flow from the input voltage source (U) across the primary winding (NI) of the transformer begins. This stream consists of two components. On the one hand, one builds up in accordance with the secondary current caused by the load consisting of the diodes (Dlb) to (Dmb) and the inductance (L), and on the other hand, the magnetizing current required by the main inductance of the transformer (T) overlaps. If the active switch (S) then switches off, the energy stored in the coil (L) is reduced via the diodes (Dia) to (Dna) and the diodes (Dlb) to (Dmb). The transformer (T) can over the diodes (Dia) to (Dna) free running. Depending on the required brightness, after the demagnetization of the transformer (T), the active switch can be switched on again immediately or a correspondingly long dead time can be inserted. Figure 2 shows a simplified actuator, in which the LEDs (Dlb) to (Dmb) are replaced in series with the inductance (L) by a short circuit. A further modification is obtained by replacing the light diodes (Dlb) to (Dmb) in series with the inductance (L) by a single diode or light emitting diode. If no potential separation is required, the transformer (T) can also be replaced by an autotransformer. Fig. 3 shows the converter of FIG. 1 with a voltage-reducing, Fig. 4 with a voltage-increasing autotransformer. The control and regulation of the actuator is carried out according to the usual techniques. In this case, switch-on pulses with a pulse length that depends on the input voltage are particularly suitable. Dimming is done via the repeat rate. In this method, no special metrological effort is required. The input voltage can be easily adjusted e.g. via a simple voltage divider supply the drive circuit.
    The object to realize actuators for the control of light-emitting diodes is inventively accomplished by the secondary winding (N2) on the one hand a first series connection of diodes and light emitting diodes (Dia, ..Dma) is connected, the cathode of the first of these diodes (Dia On the other hand, a second Serienschaitung of diodes, light emitting diodes (Dlb, ..Dnb) and an inductance (L) is connected, these diodes reversed poled as those of the first group, or that to the tap or ., Is connected to the connection point of the two partial windings (NI, N2) and the winding end of the second winding (N2) on the one hand, a first series connection of diodes and light emitting diodes (Dia, ..Dma), wherein the cathode of the first of these diodes (Dia) the winding start of the second partial winding 2 T17 / fh / 20110926 is connected and on the other hand, a second series circuit of diodes, light-emitting diodes (Dlb, ..Dnb) and an inductance (L) is connected, these diodes reversed poled as those of the first group, or that at the tap or at the connection point of the two partial windings (NI, N2) of the positive pole of the input voltage and between the beginning of the first Partial winding (NI) and the end of the second partial winding (N2) on the one hand, a first series circuit of diodes and light diodes (Dia, ..Dma) is connected, wherein the cathode of the first of these diodes (Dia) is connected to the winding start of the first part of the winding and On the other hand, a second series circuit of diodes, light-emitting diodes (Dlb, ..Dnb) and an inductance (L) is connected, wherein these diodes are reversed poled as those of the first group. Furthermore, the second series circuit can consist of only one diode or light-emitting diode and the coil (L), or instead of the second series circuit only the coil (L) can be connected. Furthermore, it makes sense to cinzubauen in each series circuit at most one non-light-emitting diode. In circuit terms, it makes sense to switch a capacitor parallel to the input voltage. The light emission can be made via the peak current through the active switch and / or via the switching frequency of the active switch. 3 TI 7 / fh / 20110926
    权利要求:
    Claims (6)
    [1]
    Actuator for driving light-emitting diodes, consisting of a transformer (T) with at least one secondary winding (N2), wherein the primary winding (N1) of the transformer (T) is connected in series with an active switch (S) and connected to this series circuit Input voltage (U) is connected, diodes and light emitting diodes (Dia, "Dma, Dlb, ... Dnb) and a coil (L) characterized in that the secondary winding (N2) on the one hand a first series connection of diodes and light-emitting diodes (Dia, ..Dma) is connected, wherein the cathode of the first of these diodes (Dia) is connected to the winding start and on the other hand, a second series circuit of diodes, light emitting diodes (Dlb, ..Dnb) and an inductance (L) is connected, said diodes reversed poled as those of the first group. Actuator for driving light-emitting diodes, consisting of an autotransformer (T) consisting of two series-connected, magnetically coupled windings or two part windings with tap (NI, N2), wherein these are connected in series with an active switch (S) and connected to this series circuit, the input voltage (U), diodes and LEDs (Dia, ..Dma, Dlb, ... Dnb) and a coil (L) characterized in that at the tap or at the connection point of the two partial windings ( NI, N2) and the winding end of the second winding (N2) on the one hand, a first series circuit of diodes and light emitting diodes (Dia, ..Dma) is connected, wherein the cathode of the first of these diodes (Dia) is connected to the winding start of the second partial winding, and on the other hand, a second series circuit of diodes, light-emitting diodes (Dlb, ..Dnb) and an inductance (L) is connected, these diodes reversed poled as those of the first group. Actuator for driving light-emitting diodes, consisting of an autotransformer (T) consisting of two series-connected, magnetically coupled windings or two partial windings with tap (NI, N2), these windings are connected in series with an active switch (S) and connected to the negative terminal of the active switch, the negative pole of the input voltage (U), diodes and LEDs (Dia, ..Dma, Dlb, ... Dnb) and a coil (L) characterized in that the tap or at the connection point of the two part windings (NI, N2) of the positive pole of the input voltage and between the beginning of the first partial winding (NI) and the end of the second partial winding (N2) on the one hand a first series connection of diodes and light-emitting diodes (Dia, ..Dma ), wherein the cathode of the first of these 4 TI 7 / fh / 20110926 diodes (Dia) is connected to the winding start of the first partial winding and on the other hand, a second Serienscha connected diodes, light-emitting diodes (Dlb, ..Dnb) and an inductance (L), these diodes reversed poled as those of the first group.
    [2]
    4. An actuator for driving light emitting diodes according to claim 1, 2 or 3, characterized in that the second series circuit consists only of a diode or light emitting diode and the coil (L).
    [3]
    5. actuator for controlling lichtemitticrenden diodes according to claim 1, 2, or 3, characterized in that instead of the second series circuit only the coil (L) is connected.
    [4]
    6. An actuator for driving lichtemitlierenden diodes according to claim 1,2, 3 or 4, characterized in that in each series circuit is connected at most one non-light-emitting diode.
    [5]
    7. An actuator for driving light-emitting diodes according to claim 1,2, 3,4, 5 or 6, characterized in that parallel to the input voltage, a capacitor is connected.
    [6]
    8. An actuator for driving light emitting diodes according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that light emission is made via the peak current through the active switch and / or the switching frequency of the active switch. 5 TI 7 / fh / 20110926
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    同族专利:
    公开号 | 公开日
    AT511990B1|2013-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1320284A2|2001-12-14|2003-06-18|The University of Hong Kong|High efficiency driver for color light emitting diodes |
    DE20220900U1|2002-11-07|2004-05-27|Schmeling, Till, Dr.rer.nat.|LED-based navigation and position lights arrangement e.g. for ships and water craft and also for road signs, includes light and color sensors for automatically adjusting required color and light-intensity|
    US20090146575A1|2007-12-05|2009-06-11|Yi-Shan Chu|Light Emitting Diode Driving Device|
    EP2079280A2|2008-01-14|2009-07-15|Tai-Her Yang|Bi-directional light emitting diode drive circuit in pulsed power parallel resonance|
    CN102170832A|2008-10-02|2011-08-31|金洸台|Cerebrovascular analysis system|WO2019219518A1|2018-05-15|2019-11-21|Signify Holding B.V.|A lighting circuit and control method|
    EP3592112A1|2018-07-02|2020-01-08|Signify Holding B.V.|A lighting circuit and control method|
    法律状态:
    2017-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20160927 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1387/2011A|AT511990B1|2011-09-27|2011-09-27|ACTUATOR FOR CONTROLLING LIGHT-EMITTING DIODES|ATA1387/2011A| AT511990B1|2011-09-27|2011-09-27|ACTUATOR FOR CONTROLLING LIGHT-EMITTING DIODES|
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