• 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:
    The invention relates to an LED module (101) with a changeable color locus, with an input (105) for a constant current supply, with at least two mutually parallel LED chains (102, 103) and with at least one white LED, the color locus of the Emission of the at least two LED chains (102, 103) differs, and preferably manually operable means (104) are provided for adjusting the distribution of the constant current to the at least two LED chains (102, 103).
    公开号:AT16692U1
    申请号:TGM202/2015U
    申请日:2015-07-07
    公开日:2020-04-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    LED MODULE WITH CHANGEABLE COLOR LOCATION AND LIGHTING DEVICE WITH SUCH A LED MODULE The present invention easily achieves color dimming of a multi-channel LED module, i.e. a change in the color locus of the total light emitted by the LED module. In particular, the present invention relates to an LED module with a changeable color location and an illumination device which has such an LED module.
    Color dimming is preferably carried out between white light spectra with different color temperatures.
    [0003] “Color dimming” is therefore generally a change in the color locus and includes color temperature dimming of white light.
    Multi-channel LED lighting devices with changeable ("tunable) color location are already known from the prior art, such as two-channel" tunable white LED lighting devices with two LED channels, each LED channel from an LED chain with at least one white LED. The term “multi-channel tunable white LED lighting device is understood to mean a multi-channel LED lighting device whose LED channels or LED chains each have at least one white LED, the color temperature of the multi-channel LED lighting device being changed by changing the ratio between the currents of the individual LED chains is adjustable. In these already known two-channel “tunable white” LED lighting devices, each channel has its own linear or switched current source, which supplies the respective LED chain with current.
    The prior art can be found in the following documents:
    - GB 2427083 B,
    - WO 2013/092843 A1, and
    - EP 2 084 941 B1.
    Multi-channel LED lighting devices according to the prior art, such as a two-channel "tunable white" LED lighting device, require a relatively large number of components because of the separate structure of the power source for each LED channel, which is disadvantageous in the size of such LEDs Lighting equipment. This large amount of hardware also entails corresponding costs. Such LED lighting devices also require a converter that is matched to the respective application. In particular with tunable converters, which can also dim, the resolution of the dimming levels for the individual LED channels of a multi-channel LED lighting device represents an increased complexity.
    It is therefore the object of the present invention to provide an improved power supply for LED channels of a multi-channel LED lighting device, the color location of this multi-channel LED lighting device should be able to be changed in a simple manner by a user.
    [0008] This object is achieved according to the invention by the features of the independent claims. The dependent claims further develop the central idea of the invention in a particularly advantageous manner.
    [0009] According to a first aspect of the present invention, an LED module with a changeable color location is provided, the LED module comprising:
    - an input for a constant current supply,
    at least two mutually parallel LED chains, each with at least one white LED, the color location of the emission of the at least two LED chains being different, and / 14
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    - Preferably manually operable means for adjusting the distribution of the constant current on the at least two LED chains.
    The multi-channel "tunable white LED module according to the invention, which represents the light-emitting part of a multi-channel LED lighting device, is designed to be supplied with a constant current from a single source, the distribution of the current between the individual LEDs Chains or LED channels of the LED module are implemented in the LED module independently of the converter used to provide power. As a result, the constant current for supplying the LED chains in tunable applications no longer has to be generated by a complicated and expensive multi-channel special converter. Instead, a conventional single-channel converter can be used, which provides a constant current at the input of the LED module according to the invention. For example, instead of an expensive 2-channel DALI converter, a simple constant current operating device can be used. Thus, the LED module according to the invention has the advantage that the current ratio between the currents of the individual LED chains can be set independently of the converter used. In addition, the current for the individual LED chains in SELV converters is set on the secondary side and therefore does not require any special protective devices. The LED module according to the invention also enables a better resolution in the dimming behavior, since the dimming and tuning, i.e. the setting of the ratio between the currents of the individual LED chains is realized separately. This is because the setting of the ratio between the currents of the individual LED chains is set in the LED module, whereas the dimming takes place outside the LED module. If the color location of the LED module is set in the LED module only by dividing the constant current made available to the LED module, the LED module can be supplied with a constant current by a converter with a fixed output variable (fixed output Converter). In addition, flicker effects are greatly minimized in the present LED module, since the total luminous flux, depending on the LEDs used, is almost constant at all times.
    Furthermore, in the LED module according to the invention, the means for adjusting the distribution of the constant current to the at least two LED chains can have a potentiometer or rotary switch, which is preferably operable by hand.
    This enables a user of the LED module according to the invention to distribute the constant current to the at least two LED chains and thus to adjust the color location of the LED module preferably by hand.
    Furthermore, the means for setting the division of the constant current can be set up to set the proportion of the constant current to be absorbed by one of the at least two LED chains.
    This is advantageous because now the LED current of each LED chain no longer has to be set separately in a multi-channel special converter, but instead a simple converter or a simple driver circuit can be used which gives the LED module a constant Provides electricity. Because in the LED module now only the portion of the constant current to be absorbed by one of the at least two LED chains is set, the portion of the total current to be absorbed by the other of the at least two LED chains automatically being obtained.
    Furthermore, the LED module according to the invention can have a control unit and a wireless or wired connection for an analog or a digital control signal, in particular a digital control signal such as a DALI bus or a DSI signal, the control unit being set up to to control the means for setting the division of the constant current according to a control signal, for example a DALI command.
    This makes it possible to set the current distribution to the at least two LED chains of the LED module and thus also the color location of the LED module by means of control signals, for example DALI commands.
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    AT 16 692 U1 2020-04-15 Austrian Patent Office [0017] Furthermore, the LED chains of the LED module according to the invention can each have a shunt resistor for measuring the current through the respective LED chain, the means being the total current measured Set the distribution of the constant current to the at least two LED chains and the total current measured corresponds to the constant current.
    This is advantageous because the current distribution of the constant current to the at least two LED chains or the correct ratio between the currents of the at least two LED chains can be set correctly by a simple current measurement using shunt resistors.
    Furthermore, the means for setting the division of the constant current can have a current source with an adjustable setpoint for setting the proportion of the constant current to be absorbed by one of the at least two LED chains, the means using the measured total current for setting the setpoint.
    This is advantageous since the constant current available can now be divided into the desired ratio between the at least two LED chains by a single current source (not a plurality of current sources). The division is carried out analogously by limiting the current in one of the at least two LED chains by means of the setpoint of the current source. The excess current then flows through the other of the at least two LED chains. The constant current can thus be divided between the at least two LED chains by regulating the current consumption of only one of the at least two LED chains, the current consumption of the other LED chain automatically being obtained. So only one power source is required for several LED chains. This reduces the number of components required and lowers costs.
    Furthermore, the means are set by adjusting the distribution of the constant current to the at least two LED chains to change the color location of the total light emitted by the LED chains of the LED module according to the invention.
    Furthermore, in the LED module according to the invention, a first LED chain of the at least two LED chains can have at least one warm white LED and a second LED chain of the at least two LED chains can have at least one cold white LED.
    Thus, the color location of the LED module according to the invention can be changed such that the total light emitted corresponds more to a warm white light or a cold white light.
    Furthermore, the means for setting the distribution of the constant current to the at least two LED chains can be set up to set the proportion of the constant current to be absorbed by the second LED chain.
    [0025] Furthermore, in the LED module according to the invention, at least one of the at least two LED chains can have LEDs of the same spectrum or have LEDs of different spectra.
    Thus, the LED chains of the LED module according to the invention can either emit light of a spectrum or emit a light with a mixed spectrum.
    Furthermore, the at least two LED chains of the LED module according to the invention can have the same number of LEDs or the at least two LED chains of the LED module according to the invention can have different numbers of LEDs.
    As a result, the different efficiency or the different efficiencies (lumens per current or lumens / watt) of different LEDs can be compensated for, so that the at least two LED chains have the same emission characteristics.
    Furthermore, the LED module according to the invention can have a constant current source or can be connected to a constant current source which supplies the LED module with the constant current.
    This is advantageous because the invention according to a simple constant current source
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    LED module, the constant total current can be provided for the at least two LED chains, which is then distributed in the LED module to the at least two LED chains. There is therefore no need for a complex multi-channel operating circuit or converter for the LED module according to the invention.
    The above-mentioned optional features can be combined in any way according to the invention to give the LED module according to the invention.
    [0032] The color location of an LED module according to the invention can be changed, which has an input for a constant current supply and at least two mutually parallel LED chains, each with at least one white LED, the color location of the emission of the at least two LED Chains differs. The distribution of the constant current to the at least two LED chains is thus preferably set by hand.
    This is advantageous because by adjusting the distribution of the constant current to the at least two LED chains, the user of the LED module in a simple manner, preferably by hand, the color locus of the LED module or the color locus of the LED module Can adjust overall light.
    Furthermore, the proportion of the constant current to be absorbed by one of the at least two LED chains can be set.
    This is advantageous since the current no longer has to be set separately for each LED chain. Only the proportion of the constant current to be absorbed by one of the at least two LED chains is set.
    Furthermore, the current through the at least two LED chains can be measured and the division of the constant current into the at least two LED chains can be divided using the measured total current, the measured total current corresponding to the constant current.
    This is advantageous since it is ensured by measuring the total current that the constant current supplied to the LED module according to the invention remains constant.
    The above-mentioned optional features can be combined in any way according to the invention in order to change the color location of an LED module according to the invention.
    According to a third aspect of the present invention, a lighting device is provided which comprises the LED module according to the invention and an actuating element for changing the color location of the LED module, preferably a rotary knob, the LED module and the actuating element being arranged on a circuit board and by means of the actuating element, the means for adjusting the distribution of the constant current to the at least two LED chains of the LED module according to the invention can be actuated by hand.
    This is advantageous because the user can set the color location of the lighting device according to the invention by simply operating an actuating element, such as a rotary knob. Furthermore, the arrangement of the LED module according to the invention and the actuating element on a circuit board offers a simpler and cheaper LED installation for color-dimmable (“tunable”) illuminations compared to the prior art. As a result, tunable applications can also be implemented in the lower price segment or in the low price segment. Furthermore, the "tuning function", i.e. the setting of the ratio between currents of the respective LED chains for setting the color location can be outsourced to a separate control device or directly to the circuit board, and when the “tuning function” is integrated in a converter, the hardware expenditure and the size of the lighting device according to the invention can be minimized. Thus, by using a single-channel converter, which is suitable for the power supply of the LED module according to the invention, and the integration of the "tuning function" on the circuit board, the wiring can be reduced to a minimum.
    [0041] Furthermore, the lighting device according to the invention can have a constant current source around 4/14
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    that the LED module supplies with the constant current. The constant current source can be designed, for example, as a high-frequency switching regulator, such as a step-down converter, step-up converter or also resonant half-bridge converter with potential isolation.
    The aforementioned optional feature can be combined according to the invention with the main feature to give the lighting device according to the invention.
    Further advantages, features and properties of the present invention will now be explained in more detail with reference to the figures of the accompanying drawing.
    Figure 1 shows a preferred embodiment of a lighting device according to the invention. Fig. 2 shows a schematic representation of a preferred embodiment of the LED module according to the invention. Fig. 3 shows a circuit implementation of the preferred embodiment of the LED module according to the invention shown schematically in FIG. 2. Figure 4 shows a CIE diagram from which the change in the color location of the LED module is evident.
    1 shows a preferred embodiment of the lighting device 107 according to the invention.
    As can be seen in FIG. 1, the lighting device according to the invention has an LED module 101 and an actuating element 106. The lighting device 107 according to the invention is constantly supplied with a constant current by a driver circuit or a converter 108, the constant current in the lighting device 107 being constant at the input 105 of the LED module 101 for supplying the LED chains 102, 103 of the LED module provided.
    Driver circuit 108 may be any LED driver circuit known to those skilled in the art that is capable of providing a constant current. For example, the driver circuit can be a step-up converter or a step-down converter. The constant current in the driver circuit 108 can be set in any way known to the person skilled in the art. For example, the setpoint of a constant current source 109 can be set via a DALI command. According to FIG. 1, the driver circuit 108 for supplying the LED module 101 with a constant current is not part of the lighting device 107 according to the invention. Of course, according to the invention, the driver circuit 108 can also be part of the lighting device 107 or the LED module 101.
    The constant current source 109 can be designed, for example, as a high-frequency switching regulator such as a step-down converter, step-up converter, isolated flyback converter or resonant half-bridge converter with potential isolation. The constant current source 109 can form part of an LED operating device which is arranged in a housing.
    [0052] An external constant current source can also be provided.
    The LED module 101 and the actuating element 106 are arranged in the lighting device 107 on a circuit board or printed circuit board, it being possible to use any circuit board or printed circuit board known to the person skilled in the art. The common arrangement of the actuating element 106 and the LED module 101 on the circuit board enables the user of the lighting device 107 to easily change the color location of the total light emitted by the LED chains 102, 103 by actuating the actuating element 106. The actuator 106 is, for example, a knob. Other actuating elements known to the person skilled in the art, by means of which at least two values of a value range can be set, can also be used.
    1, the LED module 101 according to the invention comprises two parallel LED5 / 14
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    Chains 102, 103 and a circuit (means) 104 for adjusting the division of the constant current l K onstant to the two LED strings 102, 103. According to the invention, the LED module 101 can also be more than two LED strings, or LED Have channels. In the following, however, an LED module with only two LED chains is assumed.
    According to the invention, the distribution of the current between the two LED chains is achieved such that the current consumption of an LED chain (LED chain 103) is set by the circuit (means) 104. The current consumption of the other LED chain (LED chain 102) then arises automatically, since this LED chain (LED chain 102) absorbs the remaining or remaining current.
    The circuit (means) 104 for adjusting the distribution of the constant current between the two LED chains 102, 103 is connected to the actuating element 106 in such a way that the user of the lighting device 107 can adjust the distribution ratio by actuating the actuating element 106. Consequently, the color location of the lighting device 107 can be set in a simple manner by actuating the actuating element 106. The connection between the actuating element 106 and the circuit 104 can be wireless or wired. Any type of connection known to the person skilled in the art can be used according to the invention.
    According to the invention, each LED chain has at least one white LED, the color location of the LED chains differing. For example, the LED chain 102 may have at least one warm white LED and the LED chain 103 may have at least one cool white LED. Each LED chain can have either LEDs of one spectrum or LEDs of different spectra. Furthermore, the number of LEDs in the LED chains 102, 103 of the LED module 101 can be the same or different in order to compensate for the different efficiency or different efficiencies (lumens per current) of the LEDs used.
    As already mentioned, the distribution of the constant current Ikonstant is set to the two LED chains 102 and 103 by the circuit 104. By changing the supply current of an LED chain, the color location of the light emitted by this LED chain is changed. If only one of the two LED chains 102, 103 emits light, then the color location of the total light emitted by the LED module 101 corresponds exactly to this color location. The two different color locations of the two LED chains thus correspond to the minimum and maximum adjustable color location of the LED module 101 or of the lighting device 107. By changing the ratio of the distribution of the constant current to the two LED chains 102, 103, the color location of the LED Module 101 changed along a Plank's white light curve between the color location of one LED chain and the color location of the other LED chain. Each color location on the connecting line between the two color locations of the two different LED chains 102, 103 can thus be set.
    This change in the color location of the LED module 101 can be seen from the CIE diagram of FIG. 4. The points a and b in FIG. 4 correspond to the color location of the LED module if only one of the two LED chains emits light at a time. The color location of the LED module at points a and b therefore corresponds to the color location of the respective LED chain that emits light. By changing or setting the current distribution of the constant current between the two LED chains 102, 103, the color location of the LED module 101 can now be along the Plank white light curve between the minimum color location of the LED module 101 (a) and the maximum color location of the LED Module 101 (b) can be set.
    Since the LED module 101 is the only light-emitting part of the lighting device 107, the color location of the lighting device 107 corresponds to the color location of the LED module 101.
    The LED module 201 according to the invention will now be explained in more detail with reference to FIG. 2. The LED module 201 corresponds to the LED module 101 from FIG. 1. Accordingly, the explanations regarding FIGS. 1 and 4 also for the LED module 201 of FIG. 2.
    The LED module 201 comprises only two parallel LED chains 202, 203, although according to the
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    Invention that the LED module 204 can also have more than two LED chains. A constant current for supplying the LEDs of the two LED chains is made available to the LED module 201 at an input 205. The distribution of the total current between the two LED chains 202, 203 is carried out by a circuit (means) 204 which adjusts the current consumption of one of the two LED chains.
    Any circuit known to the person skilled in the art that is suitable for setting a current consumption of an LED chain can be used for the circuit 204. For example, in the simplest form, circuit 204 may consist of a variable resistor, for example a potentiometer, which is connected in series with the LEDs of an LED chain. Increasing the resistance value would draw less current through the LED string having the variable resistor and the other LED string would draw up more current.
    2, the circuit 2 04 is implemented by a current source, the current consumption of the LED chain 203 and thus also the distribution of the total current over the two LED chains being set by setting the setpoint of the current source. For this purpose, the current flow through each LED chain is measured via two shunt resistors R1 and R2. Other measuring devices known to the person skilled in the art can also be used. The two measured currents are added to a total current which is then amplified by an amplifier in order to serve as a control variable for the setpoint adjustment. The measured total current corresponds to the constant current that is fed to the LED module at input 205. The setpoint of the current source can then be set with respect to the constant current using a potentiometer or rotary switch. Other means known to those skilled in the art and suitable for setting the target value are also possible.
    2, the current source is implemented by a feedback operational amplifier and a bipolar transistor. Other current sources known to the person skilled in the art are also possible. The current source impresses a specific current in the LED chain 203, which is dependent on the constant current, in accordance with the setpoint value set, so that the LED chain 203 absorbs a specific portion of the constant current. The remaining part of the constant current is absorbed by the LED chain 202. This shows how the constant current can be divided between the two LED chains 202, 203 by changing the setpoint of a current source.
    As already mentioned above with reference to FIGS. 1 and 4 mentioned, the color location of the LED module 201 can be adjusted along a Plank white light curve between the color locations of the two LED chains 202, 203 by adjusting the distribution of the constant current to the two LED chains 202 and 203.
    The setpoint of the current source can not only be set by means of a preferably manually operable potentiometer or a manually operable similar circuit. The LED module 201 according to the invention can namely optionally have a connection 207 for a DALI bus and a control device 208, as a result of which a DALI command can then be transmitted to the control unit 208 via the DALI bus. The control device 208 can then use DALI commands to set the setpoint value of the current source on the basis of the measured total current. The control device can be a microprocessor, an ASIC, a combination of these two or another control device known to the person skilled in the art.
    2, the LED chain 203 contains fewer LEDs compared to the LED chain 202. According to the invention, the two LED chains can also have the same number of LEDs. A different number of LEDs may be necessary if the LEDs of one LED chain have a different efficiency or different efficiencies (lumens per current) compared to the LEDs of the other LED chains. The different number of LEDs then serves to compensate for this difference in efficiency.
    As already mentioned, each of the two LED chains 202, 203 has at least one white one
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    LED on. One of the two LED chains preferably has at least one cold white LED and the other of the two LED chains has at least one warm white LED. The LED chain, which has the at least one cold white LED, is then preferably regulated by the circuit 204 (means). 2, the LED chain 203 would then have the at least one cold white LED, since the current consumption of the LED chain 203 is set or regulated by the current source with an adjustable setpoint based on the measured total current.
    3 shows a possible circuit implementation of the preferred embodiment of the LED module according to the invention shown schematically in FIG. 2. The above statements regarding Figs. 1, 2 and 4 apply accordingly to the LED module 301 of FIG. 3. Therefore, only the components of the LED module 301 that are not already known from the explanations relating to FIG. 2 are explained below.
    According to FIG. 3, the current flowing through the two LED chains 302, 303 is measured via two shunt resistors R1 and R2. These two measured current values are then added and the resulting total current is amplified via a non-inverting amplifier. The measured total current, which corresponds to the constant current provided to the LED module, can thus serve as a controlled variable for setting the setpoint of the current source. The addition and amplification can of course also be carried out by other circuits known to the person skilled in the art.
    权利要求:
    Claims (10)
    [1]
    Expectations
    1. LED module (101) with a changeable color location, characterized in that the LED module (101) is provided with an input (105) for a constant current supply, and at least two mutually parallel LED chains (102, 103) with each at least one white LED, the color location of the emission of the at least two LED chains (102, 103) differing, and that the LED module (101) preferably manually operable means (104) for setting the distribution of the constant current to the at least two LEDs Chains (102, 103).
    [2]
    2. LED module (101) with changeable color location according to claim 1, characterized in that the means (104) have a potentiometer or rotary switch, which is preferably operable by hand; and / or that the means (104) are set up to set the proportion of the constant current to be absorbed by one of the at least two LED chains (102, 103).
    [3]
    3. LED module (101, 201) with changeable color location according to one of the preceding claims, characterized in that the LED module (101,201) further comprises a control unit (208) and a connection (207) for an analog or digital, wired or Wireless control signal, in particular DALI bus, and that the control unit (208) is set up to control the means (104, 204) according to a control signal, in particular DALI command.
    [4]
    4. LED module (101) with a changeable color location according to one of the preceding claims, characterized in that the LED chains (102, 103) each have a shunt resistor (R1, R2) for measuring the current through the respective LED chain and that the means (104) use the measured total current to adjust the distribution of the constant current among the at least two LED chains (102, 103), the measured total current corresponding to the constant current.
    [5]
    5. LED module (101) with changeable color location according to claim 4 or claim 4 and one of the preceding claims, characterized in that the means (104) a current source with an adjustable setpoint for setting the by one of the at least two LED chains ( 102, 103) have a portion of the constant current to be recorded, and wherein the means (104) use the measured total current to set the desired value; and / or that the means (104), by adjusting the distribution of the constant current to the at least two LED chains (102, 103), are set up to change the color location of the total light emitted by the LED chains (102, 103).
    [6]
    6. LED module (101) with changeable color location according to one of the preceding claims, characterized in that a first LED chain of the at least two LED chains (102, 103) has at least one warm white LED and a second LED chain of the at least has two LED chains (102, 103) at least one cold white LED.
    [7]
    7. LED module (101) with changeable color location according to one of the preceding claims, characterized in that at least one of the at least two LED chains (102, 103) has LEDs of the same spectrum or has LEDs of different spectra; and / or that the at least two LED chains (102, 103) have the same number of LEDs or the at least two LED chains (102, 103) have different numbers of LEDs.
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    [8]
    8. LED module (101) with changeable color location according to one of the preceding claims, characterized in that the LED module (1) is provided with a constant current source which supplies the LED module (101) with the constant current.
    [9]
    9. Lighting device (107) with
    - An LED module (101) according to one of claims 1 to 8 and
    - An actuating element (106) for changing the color locus of the LED module (101), preferably a rotary knob, characterized in that the LED module and the actuating element are arranged on a circuit board, and that the means (106) 104) for setting the distribution of the constant current to the at least two LED chains (102, 103) can be actuated by hand.
    [10]
    10. Lighting device (107) according to claim 9, characterized in that the lighting device (107) has a constant current source that supplies the LED module (101) with the constant current.
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    法律状态:
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    申请号 | 申请日 | 专利标题
    DE202015103127.0U|DE202015103127U1|2015-06-15|2015-06-15|LED module with changeable color location and lighting device with such a LED module|
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