• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 法律状态
  • 优先权
    • 专利摘要:
    An operating device (10) for an LED module (20) with at least one light-emitting diode (21) comprises an evaluation circuit (12) which is set up to automatically detect a type of the LED module (20).
    公开号:AT15222U1
    申请号:TGM266/2014U
    申请日:2014-06-27
    公开日:2017-03-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    OPERATING DEVICE, LIGHT AND METHOD FOR SUPPLYING AN LED MODULE
    The invention relates to an operating device for a lighting means, a lamp and a method for operating a lighting means. In particular, the invention relates to an operating device for supplying an LED module which has a light-emitting diode (LED) or a plurality of LEDs.
    With increasing distribution of light sources such as LEDs, which may be arranged, for example, on an LED module, gaining equipment for such bulbs continue to gain in importance. The LEDs may be inorganic or organic LEDs. The operating device mainly has the function of supplying the LEDs with an LED current. The operating device may include a constant current source to provide the LED current to the LEDs. Additional functions may be integrated in the operating device, for example, to read a characteristic of the LED module and to adjust the operation of the operating device depending on the read characteristic. For this purpose, the operating device in addition to the output to supply the LEDs have an interface to read the characteristic of the LED module.
    With increasing use of LED-based bulbs exist different types of LED modules. LED modules can be set up for digital communication via the interface of the operating device. LED modules of another type may include a passive electrical element that encodes the LED current and may be read by the operating device. LED modules of a further type may comprise a temperature protection device which is arranged on the LED module and which is connected in operation to the interface of the operating device.
    For the different types of LED modules each proprietary operating devices can be used, which are designed specifically for use with the corresponding type of LED module. Since the corresponding types of operating equipment must be manufactured and stored, this approach leads to increased expense and increased costs.
    In addition, it may also be difficult for an installer or user to safely each find an operating device that is suitable for use with the corresponding type of LED module. If adjustment options are provided on the operating device that allow, for example, manual configurability for use with different types of LED modules, there is also the risk that the operating device will not be correctly configured for use with the respective type of LED module connected.
    It is desirable to be able to supply different types of LED modules with an operating device so that the operating device can be combined with a larger number of different LED modules. It is desirable to reduce the risk of erroneous combination of such an operating device and LED module.
    The invention has for its object to provide devices and methods that reduce the problems described. In particular, the invention has for its object to provide devices and methods in which an operating device with different types of LED modules can be combined, whereby the above-described problems of conventional operating devices can be mitigated or eliminated.
    There are given an operating device for at least one light emitting diode, a lamp and a method having the features specified in the independent claims. The dependent claims define embodiments of the invention.
    According to embodiments of the invention, an operating device for an LED module is provided with at least one light emitting diode, which is adapted to automatically detect which type of LED module is connected to the operating device.
    The operating device may in particular have an interface which is different from the output for supplying the LEDs of the LED module. The operating device may detect the LED module connected to the interface at least at a start of operation of the operating device to detect what type of LED module is.
    For example, the operating device may be configured to detect whether the LED module is set up for digital communication via the interface. Alternatively or additionally, the operating device may be configured to detect whether the LED module has a passive circuit element connected to the interface and that encodes an LED current. Alternatively or additionally, the operating device may be configured to detect whether the LED module has a temperature protection unit which is connected to the interface.
    Depending on which type of LED module is connected to the operating device, the operation of the operating device can be adapted to the connected LED module. In particular, a read-out operation, with which the LED current or another characteristic of the LED module is automatically read out by the operating device, can be performed depending on which type of LED module is connected to the operating device. Alternatively or additionally, a voltage between the interface of the operating device and a reference potential in the useful mode can be set depending on which type of LED module is connected to the operating device.
    To identify which type of LED module is connected to the operating device, the operating device can perform at least two voltage measurements, for example, to measure the current flowing from the interface via the LED module to another terminal of the operating device current. As a result, a transient behavior of a detected voltage can be detected, transient behavior can indicate that the LED module is set up for digital communication. A voltage swing generated by a temperature protection device can be detected, which indicates that the LED module has a temperature protection device.
    An operating device for an LED module with at least one light emitting diode according to one embodiment comprises an evaluation circuit which is adapted to automatically detect a type of the LED module.
    The operating device may be configured to detect whether the LED module is of a type adapted for digital communication with the operating device. Alternatively or additionally, the operating device may be configured to detect whether the LED module is of a type having a passive electronic circuit element for encoding the LED current. Alternatively or additionally, the operating device may be configured to detect whether the LED module is of a type having a temperature protection function.
    The operating device may include an output for providing an LED current for the at least one light emitting diode. The operating device may include an interface for connecting to the LED module, which is different from the output. The evaluation circuit can be set up to monitor the behavior of the LED module via the interface and to automatically detect the type of LED module depending on the behavior.
    The evaluation circuit may be configured to monitor the behavior of the LED module in a time interval immediately after the start of operation via the interface. The operating device can be set up to read out at least one characteristic of the LED module via the interface after the type of the LED module has been detected and before it is used.
    The evaluation circuit may be configured to automatically detect whether the LED module has a temperature protection device connected to the interface.
    The temperature protection device of the LED module can be set up, for example, to initiate an automatic dimming of the LED current at high temperatures or to turn off the LED module.
    The evaluation circuit may be configured to detect, depending on a potential at the interface, whether the LED module has the temperature protection device connected to the interface. Thereby, a voltage swing generated by the temperature protection device can be detected to determine that the LED module is of the type having a temperature protection device.
    The evaluation circuit may be configured to detect a potential change generated by the temperature protection device at the interface. Thereby, a voltage swing generated by the temperature protection device can be detected to determine that the LED module is of the type having a temperature protection device.
    The evaluation circuit may be configured to automatically detect whether the LED module is set up for digital communication via the interface.
    The evaluation circuit may be configured to detect, depending on a time-dependent change detected by the operating voltage, whether the LED module is set up for digital communication via the interface.
    The operating device may be configured to perform at least two voltage measurements to detect the type of LED module to detect the type of LED module. The operating device may include a variable voltage source configured to generate at least two different output voltages between the interface and a reference potential to detect the type of the LED module.
    The operating device may be configured to generate a supply voltage between an output for providing an LED current for the at least one light emitting diode and the reference potential for detecting the type of the LED module at at least one of the output voltages. This can be ensured, for example, that a temperature protection device of the LED module generates a voltage swing to detect whether the LED module has a temperature protection device.
    The evaluation circuit may be configured to read at least one characteristic of the LED module depending on the automatically detected type of LED module. The reading of the at least one characteristic can be done after detecting the type of LED module.
    The operating device may be configured to adjust the LED current in the Nutzbetrieb depending on the read characteristic. For example, the characteristic may determine the LED current allowed for the LED module. A control device of the operating device can control a constant current source of the operating device such that the corresponding LED current is generated.
    The operating device may be configured to set a potential at the interface depending on the detected type of LED module in a useful operation of the operating device.
    The operating device may be configured to switch off the interface in the useful operation, if the LED module is not set up for digital communication via the interface and has no temperature protection device which is connected to the interface.
    The operating device may be configured to perform in the Nutzbetrieb over the interface, a unidirectional or bidirectional communication of binary signal sequences with the LED module, if the LED module is set up for digital communication via the interface.
    The operating device may be configured to automatically detect types of LED modules selected from a group consisting of: LED modules configured for digital communication with the operating device; LED modules with a passive circuit element for coding the LED current and without a temperature protection device that are not set up for digital communication with the operating device; and LED modules with a passive circuit element for coding the LED current and with a temperature protection device that are not set up for digital communication with the operating device.
    An LED module according to an embodiment comprises at least one light emitting diode and is adapted for use with the operating device according to an embodiment.
    The LED module may have a supply connection and a different further interface, which is set up for connection to the interface of the operating device. The LED module can be set up for digital communication via the further interface. The LED module may include a circuit for generating a transient voltage, which is detectable by an operating device, connected to the interface. This allows the LED module to indicate to the driver that it is set up for digital communication.
    A luminaire according to an embodiment comprises an operating device according to an embodiment and an LED module, which is connected to the operating device.
    The LED module may be configured for digital communication. The LED module may include a circuit configured to generate a transient change in voltage sensed by the operating device. This allows the LED module to indicate to the driver that it is set up for digital communication.
    The LED module may comprise at least one light-emitting diode, which may be an inorganic or organic light-emitting diode.
    A method of powering an LED module includes automatically detecting a type of the LED module by an operating device and supplying the LED module with the operating device depending on the automatically detected type.
    The method may be performed by the operating device according to an embodiment.
    To detect the type of LED module, a behavior of the LED module can be monitored via an interface of the operating device at least in a time interval after a start of operation. Detecting the type of LED module may include at least two voltage measurements. As a result, a transient change in a voltage detected by the operating device can be detected, which indicates that the LED module is set up for digital communication with the operating device. Detecting the type of LED module may include at least two voltage measurements to detect a voltage swing generated by a temperature protection device of the LED module.
    The method may include reading at least one characteristic of the LED module after detecting the type. The reading can be performed by the operating device depending on the detected type. The reading can be done before a Nutzbetrieb in which the at least one light emitting diode is supplied with an LED current.
    The method may include controlling a constant current source of the operating device to adjust the LED current depending on the characteristic of the LED module.
    Further features of the method and the effects thus achieved correspond to the features and effects of the operating device according to embodiments.
    The invention will be explained below with reference to the figures based on preferred embodiments. In the figures, identical reference numerals denote identical components.
    Figure 1 shows a lamp with an operating device according to an embodiment, wherein an LED module is connected to the operating device.
    Figure 2 shows a lamp with the operating device according to an embodiment, wherein an LED module is connected to a temperature protection device to the operating device.
    Figure 3 shows a lamp with the operating device according to an embodiment, wherein an LED module, which is adapted for digital communication, is connected to the operating device.
    FIG. 4 is a flowchart of a method according to an exemplary embodiment.
    FIG. 5 is a flowchart of a method according to an exemplary embodiment.
    FIG. 6 is a flowchart of a method according to an exemplary embodiment.
    Figure 7 illustrates an operation of the operating device according to a Ausfüh approximately example, when an interface can be switched off after reading a characteristic of the LED module.
    Figure 8 illustrates an operation of the operating device according to a Ausfüh approximately example, when the LED module has a temperature protection device.
    FIG. 9 illustrates an operation of the operating device according to an exemplary embodiment when the LED module is set up for digital communication via the interface.
    FIG. 10 shows an LED module according to an embodiment which is suitable for a digital
    Communication is set up.
    FIG. 11 shows a transient behavior of one detected by the operating device
    Voltage when the LED module of Figure 10 is connected.
    FIG. 1 shows an illustration of a luminaire 1 which comprises an operating device 10 for at least one light-emitting diode (LED). The operating device 10 has a supply connection for coupling to a supply source. The supply source may be, for example, a mains voltage line. The operating device 10 has an output 13, via which the at least one LED can be supplied with an LED current ILed. The output 13 of the operating device may be connected to at least one LED track. The output 13 of the operating device 10 may be connected to an LED module 20 of the lamp 1.
    The LED module 20 may include one LED or multiple LEDs 21. The LEDs may be inorganic or organic LEDs. The multiple LEDs can be connected in series or in parallel. The plurality of LEDs can also be interconnected in more complex arrangements, for example in a plurality of series circuits connected in parallel with one another. While a number of LEDs are shown by way of example, only one LED, two LEDs, or more than two LEDs may be used.
    The operating device 10 has a constant current source 11 in order to supply the LED module with the LED current ILed. The operating device 10 may be configured to automatically detect for which LED current lLED the connected LED module 20 is designed. A control device of the operating device 10, which may be configured as a processor, microprocessor, controller, microcontroller, special application-specific circuit or another semiconductor integrated circuit, can control the constant-current source 11 so that the LED current I LED is generated, for which the connected LED module 20 is designed. The constant current source 11 may comprise a clocked converter circuit. The clocked converter circuit may be connected to the input of the operating device 10 via a power factor correction circuit and optionally a rectifier. The control device of the operating device 10 may control the clocked converter circuit so that the LED current lLED is set to a value for which the LED module 20 is designed.
    Depending on which configuration the LED module 20 has, the operating device 10 can determine in different ways for which LED current ILed the LED module 20 is designed. In general, a parameter of the LED module 20 which determines the LED current ILEd the LED module 20 can be read by the operating device 10 via an interface 15 of the operating device 10, which is connected to a further interface of the LED module 20.
    The readout process may be performed depending on which type of LED module 20 is connected to the operating device 10. For example, the LED module 20 may include a passive circuit element, e.g. an ohmic resistor 22, which can be read by the operating device 10 and which encodes the LED current ILed, for which the LED module 20 is designed. As will be described in more detail with reference to FIG. 2 to FIG. 11, other types of LED modules may also be connected to and supplied with the operating device 10 with the LED current. If the operating device is connected to an LED module which is set up for digital communication via the interface 15 and can provide information about the LED current ILEd as a binary sequence via the interface 15, the operating device 10 can display the information about the LED current received as a binary sequence from the LED module.
    The operating device 10 may have a read-out circuit 12, which automatically detects in a time interval immediately after a start of operation of the operating device 10, which type of LED module is connected to the interface 15. The readout circuit 12 may be configured to detect a voltage proportional to a current Isei flowing through the interface 15. The readout circuit 12 may be configured to detect a voltage that is proportional to a current flowing back into the operating device 10 via a terminal 14. The readout circuit 12 may be configured to detect a voltage dropping in the LED module between the interface 15 and the terminal 14. The readout circuit 12 may be configured to detect the type of the LED module depending on the detected voltage.
    The readout circuit 12 may comprise a variable voltage source. The variable voltage source may be an unregulated voltage source. The readout circuit 12 may be configured such that to detect the type of LED module, the variable voltage source generates one or at least two different output voltages. At least one of the output voltages may be equal to 0V. The voltage dropping between the interface 15 and the terminal 14 in the LED module can be detected by the operating device 10 for the output voltages of the variable voltage source. To detect transient processes, a time-dependent change of the detected voltage can also be detected.
    The operating device 10 may be configured to generate a supply voltage between the output 13 and the terminal 14 when the variable voltage source does not generate a potential difference between the interface 15 and the terminal 14. As a result, the read-out circuit 12 can detect a potential swing, which is generated by a possible temperature protection device of the LED module 20 at the interface 15.
    The readout circuit 12 may comprise at least one semiconductor integrated circuit. The integrated semiconductor circuit of the readout circuit may be separated from the interface 15 via a potential barrier, for example a SELV ("Separated Extra Low Voltage") barrier. The semiconductor integrated circuit may be configured to control the variable voltage source and to evaluate detected voltages to detect the type of the LED module. The semiconductor integrated circuit can also serve as a control device for controlling the constant current source 11.
    The operating device 10 can generally operate so that it is detected in a time interval immediately after the start of operation, which type of LED module is connected to the operating device 10.
    In a further time interval, at least one parameter of the LED
    Module be read by the operating device 10. The at least one parameter may specify an LED current ILed for which the LED module is designed. The reading of the at least one parameter can be performed by the read-out circuit 12 depending on which type of LED module has been detected. For example, depending on whether the LED module is designed for digital communication, the operating device 10 receive a binary sequence via the interface 15 in order to read out the at least one parameter of the LED module. The operating device 10 may read a passive circuit element of the LED module that indicates the LED current when the LED module is not set up for digital communication with the operating device 10.
    Subsequently, the operating device 10 can supply the LED module with the LED current lLED in Nutzbetrieb. The constant current source 12 can be controlled depending on the read characteristic of the LED module. In use, a voltage between the interface 15 and a reference potential can also assume different values, depending on which type of LED module is connected to the operating device 10. For example, the variable voltage source can be switched off if the LED module is not set up for digital communication via the interface 15. If the LED module is set up for digital communication via the interface 15, the voltage between the interface 15 and the reference potential can have one or more finite values in useful mode in order to transmit signals.
    The detection of different types of LED modules will be described with reference to Figure 1 to Figure 6 by way of example for LED modules of different types. The operating device 10 may also be configured for the automatic detection of alternative or additional types of LED modules.
    FIG. 1 shows the operating device 10 which is connected to the LED module 20. The LED module 20 has, in addition to supply terminals, a further interface which is connected to the interface 15 of the operating device 10.
    The LED module 20 is of a type in which a passive circuit element, such as an ohmic resistor 22, indicates for which LED current the LED module 20 is designed. The LED module 20 has no temperature protection device, which is connected in operation with the interface 15.
    In order to recognize that the LED module 20 is of the type in which a passive circuit element 22 can be read out via the interface 15 and no temperature protection device is present, the variable voltage source of the read-out circuit 12 can sequentially generate two different output voltages. In each case, a voltage can be detected which is proportional to the current Isei via the interface 15.
    For the LED module 20 of the type having an ohmic resistor 22, it is recognized that the voltage dropped in the LED module between the interface 15 and the terminal 14 is equal to the output voltage of the variable voltage source , For example, the readout circuit 12 can detect that a voltage of 0 V drops across the resistor 22 when the output voltage of the variable voltage source is 0 V. The readout circuit 12 can detect that across the resistor 22, a voltage that is equal to the output voltage of the variable voltage source and that has a value greater than zero, when the variable voltage source generates a voltage greater than zero.
    The operating device 10 can determine that the LED module 20 is not set up for digital communication and has no temperature protection device connected to the interface 15, when the detected voltage, which drops across the resistor 22, for example, each stable equal to the output voltage the variable voltage source of the readout circuit 12 is.
    FIG. 2 shows the operating device 10, which is connected to an LED module 30. The LED module 30 has, in addition to supply terminals, a further interface which is connected to the interface 15 of the operating device 10. The LED module 30 includes a temperature protection device 31, which is conductively connected to a supply terminal of the LED module 30. The temperature protection device 31 is also conductively connected to the further interface of the LED module 30, which is connected in operation with the interface 15 of the operating device 10.
    In order to recognize that the LED module 30 has a temperature protection unit 31 connected to the interface 15, the operating device 10 can generate a supply voltage for the LEDs 21 between the output 13 and the terminal 14. The supply voltage can be chosen so as to ensure that the temperature protection unit 31 is thereby activated.
    Even if the variable voltage source of the readout circuit 12 is turned off, the temperature protection unit 31 causes a voltage swing at the interface 15. The voltage swing, which may be the potential difference between the interface 15 and the reference potential P0, is generated by the temperature protection unit 31 and can be detected by the read-out circuit 12. The operating device 10 can detect the presence of the temperature protection device 31 by detecting a voltage swing generated by the temperature protection unit 31.
    FIG. 3 shows the operating device 10, which is connected to an LED module 40. The LED module 40 has, in addition to supply terminals, a further interface which is connected to the interface 15 of the operating device 10.
    The LED module 40 is set up for digital communication with the operating device 10 via the further interface 95 and the interface 15. For this purpose, the LED module 40 may comprise a controllable switch 42 and a control circuit 41 for controlling the controllable switch 42. The LED module 40 is arranged such that a voltage detected by the operating device 10, which may be proportional to the current Isei between the interface 15 and the terminal 14, shows a transient change at a start of operation of the operating device 10. The LED module 40 may include a transistor and / or a capacitor coupled to the interface 15 for example to produce a time-varying current flow between the interface 15 and the terminal 14. The LED module 40 may be configured to generate the time-varying resistance already when a voltage generated by the variable voltage source of the operating device 10 is less than a supply voltage of a microcontroller of the LED module 40. The microcontroller of the LED module control the digital communication via the interface 15 as soon as the supply voltage is applied to it.
    In order to recognize that the LED module 40 is set up for digital communication via the interface 15, the operating device 10 can detect the transient process indicating that the LED module 40 is set up for digital communication. For example, the readout circuit 12 may be configured to detect a transient change in a voltage detected by the readout circuit 12. The sensed voltage may be proportional to the current Isei from the interface 15 to the terminal 14. For this purpose, the variable voltage source of the read-out circuit 12 can generate a voltage between the interface 15 and the terminal 14.
    The operating device 10 can detect by detecting a transient change in the detected voltage that the LED module 40 is set up for digital communication with the operating device 10.
    The operating device 10 may alternatively or additionally recognize other types of LED modules than the types exemplified in FIG. 1 to FIG.
    FIG. 5 is a flow chart of a method 50 according to one embodiment. The method 50 may be performed automatically by the operating device 10.
    At step 51, an operating start of the operating device 10 takes place
    Operating device 10 in a detection phase automatically, which type of LED module is connected to the operating device 10. For this purpose, the behavior of the LED module can be monitored via an interface 15, which is different from the terminals 13, 14 for supplying the LED module with the LED current. The detection phase can take place in a time interval immediately after the start of operation of the operating device 10. Detecting the type of LED module may include detecting whether the LED module has a temperature protection device connected to the interface 15. The detection of the type of LED module may alternatively or additionally include detecting whether the LED module is set up for digital communication via the interface 15.
    At step 53, the operating device 10 automatically reads at least one parameter for the operation of the LED module from the LED module. The reading can be done depending on the detected type of the LED module. The operating device 10 may read the resistance of a passive circuit element 22 of the LED module to detect the LED current when the LED module is not set up for digital communication via the interface 15. The operating device 10 can receive a sequence of binary signals via the interface 15 when the LED module is set up for digital communication. In both cases, the operating device 10 can in each case query information about the LED current from the LED module. Alternative or additional parameters can be read out by the LED module.
    At step 54, the operating device 10 supplies the LEDs in use with the LED current. The constant current source 11 of the operating device 10 can be controlled such that the generated LED current ILed depends on the characteristic read out in step 53. For this purpose, a clocked converter of the constant current source 11 can be switched clocked so that the generated by the operating device 10 LED current lLED is set to a value which is determined by the read-out at step 53 characteristic.
    Optionally, the useful operation may also be performed at step 54 depending on the detected type of LED module. For example, the interface 15 can be selectively turned off depending on the detected type of LED module in Nutzbetrieb.
    FIG. 5 is a flowchart of a method 60 that may be performed automatically by the operating device 10 according to one embodiment at a start of operation.
    At step 61, a finite supply voltage is generated for the LEDs of the LED module. At step 62, a variable voltage source of the readout circuit 12 remains disabled so that it does not generate an output voltage.
    At step 63 it is checked whether the voltage detected by the operating device, which may for example be proportional to a current flowing through the resistor 22, is different from zero. In particular, it can be checked whether a voltage swing generated by a temperature protection device raises the potential at the interface 15 in comparison to the potential at the terminal 14.
    At step 64, it can be seen from the detection of the voltage swing at step 63 that the LED module has a temperature protection device. At step 65 it can be seen that the LED module has no temperature protection device when no voltage between the interface 15 and the terminal 14 is detected when the LEDs are supplied with a sufficiently large supply voltage.
    FIG. 6 is a flowchart of a method 70 that may be performed automatically by the operating device 10 according to one embodiment at a start of operation.
    At step 71, when the operation starts, the variable voltage source of the readout circuit 12 initially does not generate an output voltage. At step 72, a finite output voltage is generated between the interface 15 and the terminal 14 by the variable voltage source.
    At step 73 it is checked whether the voltage detected by the operating device, which may be, for example, proportional to a current flowing between the interface 15 and the terminal 14, shows a transient behavior. In particular, it can be checked whether the detected voltage Udet has a transient rise after the start of operation, which indicates the presence of non-resistive elements.
    At step 74, it can be seen from the detection of the transient behavior at step 73 that the LED module for digital communication is set up via the interface 15. At step 75, it can be seen that the LED module is not configured for digital communication if no transient increase in the detected voltage Udet is detected.
    The methods 60 and 70 may also be combined to determine if the operating device has a temperature protection device and to determine if the operating device is set up for digital communication.
    The operation of the operating device 10 and in particular the voltage between the interface 15 and the reference potential P0 may be different depending on which type of LED module the operating device 10 has detected. This will be explained in more detail with reference to Figure 7 to Figure 9, wherein a time interval 81 each represent the detection phase, a further time interval 82 a measurement phase for reading at least one characteristic and a subsequent time interval 83 the Nutzbetrieb. FIGS. 7 to 9 each show permissible voltages between the interface 15 and the connection 14 of the operating device 10.
    Figure 7 illustrates the operation of the operating device 10 when an LED module 20 has been detected without a temperature protection device that is not set up for digital communication.
    In the detection phase in the time interval 81, the LED module 20 can be detected. For this purpose, the output voltage between the interface 15 and the terminal 14 may be in a range 84 which is smaller than a lower voltage threshold V-i.
    In the measuring phase in the further time interval 82, at least one parameter of the LED module 20 can be read out by the operating device 10. In particular, the resistance of the ohmic resistor 22 can be read out. The output voltage between the interface 15 and the terminal may be in a range 85 which is smaller than an upper voltage threshold V2.
    In the useful operation in the subsequent time interval 83, the interface 15 can be switched off. The output voltage between the interface 15 and the terminal 14 of the operating device 10 may be 0 V.
    Figure 8 illustrates the operation of the operating device 10 when an LED module 30 has been detected with temperature protection device that is not set up for digital communication. The detection phase in the time interval 81 and the measurement phase in the further time interval 82 can be carried out as described with reference to FIG.
    I m Nutzbetrieb in the subsequent time interval 83, the interface 15 can be turned off. The voltage 86 between the interface 15 and the terminal 14 may have a finite value V0 by a voltage swing generated by the temperature protection device 40.
    Figure 9 illustrates the operation of the operating device 10 when an LED module 40 has been detected without a temperature protection device, which is set up for digital communication. The detection phase in the time interval 81 may be as described with reference to FIG. The voltage in the detection phase can be kept smaller than a lower voltage threshold V-i. The lower voltage threshold V-i is preferably set so that a microcontroller of the LED module 40, which controls the communication with the operating device 10, is not yet activated at the output voltage V-i.
    In the measuring phase in the further time interval 82, at least one parameter of the LED module 40 can be read out by the operating device 10. In particular, the operating device 10 can receive a binary sequence via the interface 15, which determines the LED current or another characteristic of the LED module 40. The output voltage between the interface 15 and the terminal 14 may be in a range 87 and be both greater than a lower voltage threshold V-i and less than an upper voltage threshold V2. The output voltage between the interface 15 and the terminal 14 may be determined in the measurement phase in particular so that the microcontroller of the LED module 40, which controls the communication with the operating device 10, is supplied with its supply voltage and is activated.
    In Nutzbetrieb in the subsequent time interval 83, the interface 15 can remain switched on for digital communication between the operating device 10 and the LED module 40. For this purpose, the output voltage between the interface 15 and the terminal 14 may be in a range 87 and be both greater than the lower voltage threshold Vi and less than the upper voltage threshold V2. This can ensure that the microcontroller of the LED module 40, which controls the communication with the operating device 10, is supplied with its supply voltage. Alternatively, the interface 15 can be switched off in the useful mode. The output voltage between the interface 15 and the terminal 14 of the operating device 10 can then be 0 V.
    FIG. 10 shows an LED module 40 according to an exemplary embodiment that is set up for digital communication with the operating device 10. The LED module 40 has supply connections 93, 94 for connection to the output 13 and the connection 14 of the operating device. The LED module 40 has a further interface 95 for connection to the interface 15 of the operating device 10.
    The LED module 40 may have a controllable switch 42 in order to transmit signals to the interface 15 of the operating device 10 via the further interface 95. The LED module 40 may include a semiconductor integrated circuit 43 that may be configured to control the optional controllable switch 42. The semiconductor integrated circuit 43 may be a microcontroller or a controller. The integrated semiconductor circuit 43 can be supplied via the interface 15 of the operating device and the further interface 95 of the LED module 40 with a supply voltage.
    The LED module 40 may include a circuit 90 connected between the further interface 95 and the semiconductor integrated circuit 43. The circuit 90 may be configured to generate a transient behavior of a voltage detected by the operating device 10 when a finite output voltage of the operating device 10 is present between the interface 95 and the supply terminal 94. The circuit 90 may include, for example, a transistor 45 and a capacitor 48. An emitter of the transistor 45 may be connected via a resistor 44 to the further interface 95. A base of the transistor 45 may be connected to the semiconductor integrated circuit 43 via a resistor 46. The base of the transistor may be connected via a further resistor 47 to a capacitor 48.
    When a voltage is applied between the interface 95 and the supply terminal 94, the transistor 45 is initially conductive. The capacitor 48 is charged. The time-dependent change of the current flowing between the further interface 95 and the supply terminal 94 can be detected by the operating device 10.
    FIG. 11 exemplarily illustrates a time-dependent transient change of the voltage 100 detected by the operating device 10 when the LED module 40 causes a transient behavior in the detection phase. By detecting the transient voltage rise, the operating device 10 can recognize that the LED module 40 is set up for digital communication.
    While embodiments have been described with reference to the figures, variations may be used in other embodiments. For example, while exemplary embodiments have been described in which an operating device is configured to detect whether the LED module is configured for digital communication and / or the LED module includes a temperature protection device, operating devices may also be configured to alternatively or additionally other Identify types of LED modules.
    The operating device according to one embodiment may be an LED converter.
    Operating devices, luminaires and methods according to exemplary embodiments can be used for lighting systems that use light sources with LEDs.
    权利要求:
    Claims (10)
    [1]
    claims
    An operating device for an LED module having at least one light emitting diode (21), said operating device (10) comprising: an evaluation circuit (12) adapted to automatically energize one type of LED module (20; 30; 40) an output (13) for providing an LED current (Led) for the at least one light emitting diode (21), and an interface (15) for connecting to the LED module (20; 30; 40), wherein the evaluation circuit ( 12) is arranged to monitor behavior of the LED module (20; 30; 40) via the interface (15) and to automatically detect the type of the LED module (20; 30; 40) depending on the behavior.
    [2]
    2. Operating device according to claim 1, wherein the evaluation circuit (12) is adapted to automatically detect whether the LED module (30) has a with the interface (15) connected to the temperature protection device (31).
    [3]
    3. operating device according to claim 2, wherein the evaluation circuit (12) is adapted to detect, depending on a potential at the interface (15), whether the LED module (30) connected to the interface (15) temperature protection device (31) having.
    [4]
    4. Operating device according to claim 2 or claim 3, wherein the evaluation circuit (12) is adapted to detect one of the temperature protection device (31) generated potential change at the interface (15).
    [5]
    5. Operating device according to one of the preceding claims, wherein the evaluation circuit (12) is adapted to automatically detect whether the LED module (40) is set up for digital communication via the interface (15).
    [6]
    6. Operating device according to claim 5, wherein the evaluation circuit (12) is adapted to detect, depending on a time-dependent change in a voltage detected by the operating device (10), whether the LED module (40) for digital communication via the interface ( 15) is set up.
    [7]
    7. Operating device according to one of the preceding claims, wherein the operating device (10) comprises a variable voltage source for detecting the type of the LED module (20; 30; 40) at least two different output voltages between the interface (15) and a reference potential ( P0).
    [8]
    8. Operating device according to claim 7, wherein the operating device (10) is adapted to detect the type of the LED module (20; 30; 40) at at least one of the output voltages, a supply voltage between an output (13) for providing a LED Current for the at least one light emitting diode (21) and the reference potential (P0) to produce.
    [9]
    9. Operating device according to one of the preceding claims, wherein the evaluation circuit (12) is adapted to at least one characteristic of the LED module (20; 30; 40) depending on the automatically detected type of the LED module (20; 30; 40). read.
    [10]
    A method of powering an LED module (20; 30; 40) comprising: automatically detecting a type of LED module (20; 30; 40) by an operating device (10), and reading at least one characteristic of the LED module (20; 30; 40) by the operating device (10) depending on the automatically detected type. For this 6 sheets of drawings
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    同族专利:
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    法律状态:
    2020-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20190630 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014208710.4A|DE102014208710A1|2014-05-09|2014-05-09|Operating device, luminaire and method for supplying an LED module|PCT/AT2015/050117| WO2015168719A2|2014-05-09|2015-05-08|Operating device, lamp, and method for supplying an led module|
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