Patent Application
20140103836
The present invention relates to the field of operating devices for illumination means, wherein external control information for programming or configuring the behavior of the electronic ballast or operating device can be delivered to a control unit, and can be stored in a memory associated with the control unit.
Electronic ballasts (EVGs) for operating lamps, in particular gas discharge lamps, are already well known. Ballasts of the latest generation are thereby not only capable of precisely monitoring the operating behavior of a lamp to be operated and ensuring a fault-free lamp operation, but beyond this also have a data or communication connection, via which they can communicate with other ballasts or with central control devices. Through this there is for example the possibility to send to the ballast brightness commands for the controlled lamps. Beyond this, the sent data can also generally influence the operating behavior of the ballast, for example indicate the average power to be delivered to the gas discharge lamp or to determine the pre-heating duration before an ignition of the lamp.
Along with these ballasts just described, which are configured for extensive data communication, there are however often put to use also simply configured ballasts which are exclusively provided for operating the associated lamp in accordance with a predetermined scheme. The operating behavior of these ballasts is already largely fixed during production and can subsequently not be influenced or only slightly influenced. In particular such ballasts are not configured to communicate, or at least to receive data, via corresponding data or communication connections with other participants of an illumination system or with a central control device.
In order, even with these more simple ballasts, to open up the possibility of being able to influence the operating behavior still at least to a certain degree at a later time point, that is after production, it is known to provide such ballasts with a configuration input. At this configuration input there can then be connected passive configuration elements such as e.g. resistances or the like, which through their physical characteristics influence a certain function of the ballast. For example it is known, through the size of an external resistance connected to the configuration input, to set the power which is delivered from the ballast to the lamp, or to determine the duration of the pre-heating phase before an ignition of the gas discharge lamp.
Through the arrangement of an additional configuration input, however, the outlay for production of the electronic ballast is in turn increased. Further, the possibilities for influencing the operating behavior of the ballast with the aid of such a configuration input are limited. Beyond this, it is to be considered that usually electronic ballasts are fully enclosed in a housing, which solely has the terminals for current supply of the ballast and the terminals for the lamp. With these very compact configurations, supplementary terminals or inputs are not provided, for which reason a subsequent influencing of the operating behavior is not possible.
The problems referred to above relate not only to electronic ballasts for gas discharge lamps but general operating devices for illumination means. Also in the case of other illumination means such as e.g. incandescent lamps, halogen lamps or LEDs, it is often desired or even necessary to be able to subsequently influence the operating behavior of the device (or to be able to subsequently correct, centrally and without disassembly, a subsequently recognized failure in the software of the operating device). A particularly important application example is thereby the employment of LEDs or LED modules, since these light sources for realizing a precise color output must be calibrated after their production, which as a rule is effected through the transfer of appropriate configuration data.
Correspondingly, the object of the present invention is to indicate a new type of possibility of influencing the operating behavior of an electronic ballast or an operating device for illumination means. In particular the possibility is intended to be opened to deliver external control information for programming or configuring the operating behavior, in a manner which is as simple as possible to the control unit, associated with the operating device, without it being necessary for this to associate additional terminals or inputs.
This object is achieved by means of the features of the independent claims. The dependent claims further develop the central concept of the invention in particularly advantageous manner.
It is a concept of the present invention to use as programming inputs, via which the external control information can be delivered to a control unit arranged in the ballast or operating device, the main terminals for current supply of the ballast or operating device and/or the output terminals, which generally are provided for the purpose of delivering to a lamp an appropriate operating voltage, for which purpose the mains and output terminals are internally connected with the control unit. In accordance with the solution according to the invention there is thus needed no additional configuration input or data input, since the already present terminals of the ballast or operating device are employed for data reception. There arises through this in very simple manner the possibility of transmitting data to the control unit, which can be stored in a memory associated with the control unit, whereby the data then influences the operating behavior of the ballast or operating device, for example setting certain operating parameters or defining operational processes.
The internal connection between the mains terminals and/or output terminals serving as programming input with the control unit can for example be effected via connection lines which include a resistive voltage divider. Alternatively thereto, the connection could however also be effected magnetically, capacitatively, optically or by means of a wireless connection.
In accordance with a preferred configuration of the present invention there is involved in the case of the memory for storing the externally delivered control information a non-volatile memory. The control unit has at least a logic circuit, for example a microprocessor, which is connected with the memory.
The transfer of the control information is preferably effected in a time period in which the ballast or operating devices is inactive, insofar as the lamp is not supplied with current in this time period. After conclusion of the transfer of the control information the lamp can then be ignited in the usual manner and operated, whereby the operating behavior is determined by means of the previously delivered control information.
For transmitting the control information there is provided in accordance with the invention a programming device which is configured for the purpose of being connected to the mains terminal and/or output terminals of the ballast or operating device, in order to transfer the control information to the control unit arranged in the ballast or operating device. Preferably there is hereby involved a portable programming device, which can be taken by a user to the already installed ballast/operating devices.
The present invention correspondingly relates also to an illumination arrangement of larger scale, which has at least one luminaire with an electronic ballast for operation of a lamp or has a operating device for illumination means and a programming device, which is configured in the above-described manner for the purpose of transferring control information to the ballast or operating device and thereby influencing its operating behavior.
The subsequent transfer of control information is otherwise also of advantage since through this a lamp operating within a desired power window can be ensured. Often ballasts deviate, after their production, from the predetermined desired power, which is due to tolerances in the components used which are unavoidable. By means of a subsequent influencing for example of the intermediate circuit voltage or the operating frequency of the supply voltage delivered to the load circuit with the lamp, such component tolerances can be taken into account and deviations in the output power corrected. Particularly important in this context is also the subsequent calibration of semiconductor light sources such as e.g. LED modules, in order through this to ensure a precise color provision.
Below, the invention will be described in more detail with reference to the accompanying drawings. The single
The ballast 1 in accordance with the invention is only reproduced schematically in
Illustrated components are a rectifier 2, connected with the input terminals 5 of the ballast 1, for rectifying the supply a.c. voltage present at the terminals 5, and an inverter 3 which transforms the d.c. voltage received from the rectifier 2 into a high frequency a.c. voltage and passes this on as output voltage to output terminals 6 of the ballast 1, at which in turn the lamp LA to be operated by the ballast 1 is connected. The further components, that are usually provided in electronic ballast, for example diverse elements for harmonics filtering or a smoothing circuit for transforming the rectified supply a.c. voltage into a d.c. voltage of particular level, are not illustrated, since they are already known in their function and for the present invention are not further of significance.
Further it is to be remarked that the present invention is also not restricted to employment in the case of electronic ballasts, but instead can be put to use in general with operating devices for arbitrary illumination means.
A significant component of the electronic ballast 1 with regard to the present invention is a control unit 4 to which commands can be delivered from the outside and which controls the operation of the operating device in accordance with available commands and desired values.
In the illustrated example, the control unit controls the inverter 3 and therewith the operating voltage for the lamp LA provided by the inverter 3. The control unit 4 for this purpose generates appropriate control information and transfers this to the inverter 3, which for example may have a half-bridge arrangement of two controllable switches. By means of an appropriate influencing of the switching frequencies the lamp—which may in particular be a gas discharge lamp—can be operated in desired manner, in particular initially pre-heated, ignited and supplied with a predetermined power.
Corresponding information which influences the behavior of the control unit 4, and thus of the ballast 1 overall, is contained in a memory 4a, which may be functionally connected with the control unit or—as illustrated—is a component of the control unit 4. This memory is preferably a non-volatile memory. The control unit 4 in turn contains preferably a microprocessor μC which can access the memory 4a and is responsible for the generation of the appropriate control signals for controlling the inverter 3.
It is to be noted that instead of the microprocessor μC, also other logical circuits can be put to use, which assume the necessary control tasks.
The operating behavior of the illustrated electronic ballast 1 can be altered or adapted in that the information contained in the memory 4a is altered or updated. To date it was known to provide for this purpose an additional control input at the ballast 1, which was connected with the control unit 4 or the memory 4a and via which then appropriate data could be transmitted to the control unit 4.
In accordance with the present invention, however, this additional input is now omitted. Instead, there are employed as programming input already present terminals of the ballast 1. In the illustrated exemplary embodiment in particular the output terminals 6 are used, which are connected via corresponding connection lines, and a voltage divider of two resistances R1 and R2, with the control unit 4. As is illustrated in
Instead of the illustrated connection between the output terminals 6 and the control unit 4 by means of the illustrated connection lines and the resistive voltage divider it could also be provided to realize the connection by means of a magnetic, capacitative or optical coupling. Further it would also be conceivable to transfer internally the control information from the output terminals 6 to the control unit 4 by means of a radio connection.
The external programming device 10 is in particular configured to be portable and can be provided for the purpose of being connected to various ballasts of an illumination system, in order to configure or program the devices subsequently.
The control information transmitted from the external programming device 10 is stored in memory 4a of the control unit 4 and determines the operating behavior of the ballast 1. In particular the data may contain information with regard to the power delivered from the ballast 1 to the lamp LA. Thereby there is the possibility of externally predetermining a desired power of operating frequency at which the lamp LA is to be operated. Through this there arises in particular the possibility of subsequently compensating for component tolerances occurring during production of the ballast, and therewith ensuring that all lamps are operated at the necessary or optimal power. A further possibility consists, through the external control information, of influencing the pre-heating of the lamps or adapting the power to a newly connected lamp type.
A further important field of application of the present invention is in the control of LEDs or LED modules. Such semiconductor light sources must as a rule still be calibrated after their assembly, in order to ensure a light emission of the desired color. This is particularly important in the case of LEDs since the power with which the LEDs are operated has direct effect on the color of the emitted light. With an operating device for operation of LEDs in accordance with the present invention, there is now the possibility of carrying out the necessarily calibration in simple manner after production of the LED module. The necessary operating data can be transferred in accordance with the invention in simple manner to the operating device.
The substantial advantage of the solution in accordance with the invention consists in that no additional programming or configuration input is necessary, but instead the already present terminals of the operating device 1, which are usually configured as clamping contacts, are used.
Thereby there arises, alternatively or additionally to the illustrated configuration, in which the output terminals 6 of the ballast 1 are used as programming input, also the possibility—illustrated by broken lines—to use the input terminals 5, to which usually the supply a.c. voltage for the ballast 1 is applied, as programming input. The advantage of the illustrated variant, in which the output terminals 6 are employed as programming input, consists in that in this case the ballast 1 can at the same time be supplied with current in the normal manner.
If, in contrast, the input terminals 5 are used as programming input, it must be ensured that the current necessary for operation of the control unit and/or writing the memory 4a remains available. This could for example be effected in that the programming device in this case makes available the necessary energy. Also the use of an internal battery or accumulator battery in the ballast or operating device would be conceivable. In both cases the operating device could also be programmed in an offline condition or with mains switched off.
During the programming, the voltage supply need solely be sufficient to be able to operate the electronics (control unit, memory etc.). However in this programming mode, no power is given to the connected illumination means, so that the supply voltage may be lower than in the case of actual operation. The supply voltage may in programming mode also be a d.c. voltage instead of the a.c. voltage usual for illumination means operation.
It is also conceivable that the programming commands are modulated onto a supply voltage. In order to be able to exceed the narrow modulation level limits in the case of so-called power line technology, the control unit is functionally separated from the mains. For example it is generally ensured by means of filtering that also high modulation levels applied at the mains terminals cannot radiate back into the mains supply.
The transmission of the external control information is effected preferably in a period of time in which the lamp LA is not in operation. Only after the transfer has been completed can a lamp start then be carried out and the lamp operated under the conditions which were determined by means of the transferred control information.
The present invention thus permits, in simple manner, subsequently, i.e. after the production of the ballast or operating device, to have influence on its operating behavior. For this purpose no additional programming input need be provided, so that the ballast or operating device can be enclosed in the housing in the previously known manner. Thus, also for programming, for example in the case of a software alteration or fault correction, no disassembly of the device is necessary. If appropriate, software alterations can be carried out even centrally.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2004 009 993.6 | Mar 2004 | DE | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10598484 | Jun 2007 | US |
| Child | 14134445 | US |
