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公开(公告)号：US20240147589A1
公开(公告)日：2024-05-02
申请号：US18272460
申请日：2022-01-26
申请人： eldoLAB Holding B.V.
IPC分类号： H05B45/375 , H05B45/24 , H05B45/38
CPC分类号： H05B45/375 , H05B45/24 , H05B45/38
摘要： A multi-channel LED driver for driving an LED fixture, wherein the multi-channel LED driver comprising a plurality of output channels, wherein each output channel is connectable to an LED or LED string of the LED fixture, the multi-channel LED driver comprising:
a plurality of power converters, each power converter being associated with an output channel of the plurality of output channels, wherein each power converter comprises a switch, and wherein each power converter converts an input power at an input terminal to a current at a respective output channel of the multi-channel LED driver,
a comparator configured to compare a current signal representing the current measured at an output channel by a current measurement element with a reference signal representing a current set point for the output channel, and wherein the comparator generates an output signal to control the switch of the power converter associated with the output channel,
a controller arranged to determine successive, for each of the plurality of power converters associated with the plurality of output channels, a duty cycle of the respective switch of the power converter during a measurement window and wherein the controller is further arranged to control the switch of the power converter outside the measurement window by:
disabling the comparator to control the switch and
providing a duty cycle signal, representing the duty cycle of the switch as determined during the measurement window, to the switch of the power converter to control an operation of the switch.-
公开(公告)号：US11825578B2
公开(公告)日：2023-11-21
申请号：US17628067
申请日：2020-07-16
申请人： eldoLAB Holding B.V.
IPC分类号： H05B45/385 , H05B45/34 , H05B45/54
CPC分类号： H05B45/385 , H05B45/34 , H05B45/54
摘要： A method for starting up an illuminating process of a plurality of series connected LEDs by means of a LED driver is described, whereby a maximum allowed voltage output of the LED driver is lower than a forward voltage of the plurality of series connected LEDs in a cold state.
The method comprises:
d) providing a first current, in value lower than a desired current, by the LED driver to the plurality of series connected LEDs, resulting in a forward voltage across the plurality of series connected LEDs lower than the maximum allowed voltage output of the LED driver,
e) waiting during a predetermined wait time period,
f) stepping up of the first current to a second current provided by the LED driver to the plurality of series connected LEDs.-
公开(公告)号：US20230261513A1
公开(公告)日：2023-08-17
申请号：US18015285
申请日：2021-07-13
申请人： eldoLAB Holding B.V.
IPC分类号： H02J9/06 , H05B45/375 , H05B45/38
CPC分类号： H02J9/061 , H05B45/375 , H05B45/38
摘要： Disclosed is an auxiliary battery circuit for an LED driver for driving at least one LED group. The LED driver is adapted to be powered by a main energy source. The auxiliary battery circuit comprises: a battery, a conversion circuit adapted to be connected to the LED driver and to the battery. The conversion circuit has: a first mode wherein the battery is adapted to receive energy from the LED driver, and a second mode wherein the battery is adapted to provide energy to the LED driver. A control unit of the auxiliary battery circuit is adapted to detect when the main energy source is in a failure mode, and control the conversion circuit. The control unit is adapted to arrange the conversion circuit in the second mode when the main energy source is in the failure mode.
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公开(公告)号：US11626793B2
公开(公告)日：2023-04-11
申请号：US17041796
申请日：2019-03-26
申请人： Eldolab Holding B.V.
IPC分类号： H02M1/42 , H05B45/3725 , H02M3/158 , H05B45/375 , H05B45/38 , H02M1/00
摘要： An LED driver is described, the LED driver comprising: a back end module BE comprising a switch mode power converter SMPS configured to operate in a self-oscillating current control mode, the back end module BE further comprising: an input terminal configured to receive a DC bus voltage; an output terminal configured to output a supply current for powering an LED fixture; a control unit configured to control the back end module to operate the SMPS in a voltage control mode by: determining a switching frequency of the SMPS when operating in the self-oscillating current control mode; determining a minimal switching frequency of the SMPS and receiving an input signal representative of the supply current for powering the LED fixture; wherein the control unit is further configured to control the switch of the SMPS in the voltage control mode by: operating the switch of the SMPS at a substantially constant frequency based on the determined minimal switching frequency and modulating a duty cycle of the switch to maintain the supply current at a desired current.
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公开(公告)号：US20220131606A1
公开(公告)日：2022-04-28
申请号：US17569089
申请日：2022-01-05
申请人： eldoLAB Holding B.V.
IPC分类号： H04B10/116 , H05B45/22 , H05B47/195 , H05B45/12 , H04B10/50 , H04B10/66
摘要： The present invention pertains to a system and method for operating at least one LED unit of lighting grid comprising a plurality of LED units, wherein the LED units are configured to transmit a VLC signal including a code word. A plurality of user equipment devices captures the light transmitted by the LED unit and determines parameters related to the light, such as a VLC quality parameter, flicker value, light intensity parameter and light colour parameter. Based on these parameters, a controller determines control parameters for the LED unit. As such, a feedback loop is created wherein the LED unit is controlled based on measurements with the user equipment devices.
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公开(公告)号：US11075696B2
公开(公告)日：2021-07-27
申请号：US16482961
申请日：2018-02-08
申请人： EldoLAB Holding B.V.
IPC分类号： H04B10/116 , H05B45/10 , H05B45/20
摘要： An LED driver for driving a plurality of LEDs or LED groups to transmit light in a VLC mode is described, wherein the LED driver comprises a control unit that is configured to: receive, at an input terminal, a set-point representing a desired illumination characteristic and data that is to be transmitted using VLC; determine a current profile for each of the plurality of LEDs or LED groups to generate the desired illumination characteristic, whereby an envelope of the combined current profile comprises a modulation in order for a corresponding intensity modulation as perceived by a sensor to represent a variable length VLC code representing the data, the VLC code comprising code words, a code word comprising a plurality of symbols; generate one or more control signals to drive the plurality of LEDs in accordance with the current profiles in order for the plurality of LEDs or LED groups to transmit the VLC code; and upon receipt of a further set-point representing a different illumination characteristic during the transmission of the VLC code, determine an adjusted current profile or profiles for one or more of the plurality of LEDs or LED groups based on the different illumination characteristic, whereby the current profile is only adjusted for some, not all, symbols of a next code word to be transmitted; generate one or more control signals to drive the plurality of LEDs or LED groups in accordance with the adjusted current profile or profiles, and output, via an output terminal of the control unit, one or more control signals to drive the plurality of LEDs or LED groups in accordance with the adjusted current profile or profiles.
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公开(公告)号：US20210185778A1
公开(公告)日：2021-06-17
申请号：US16761708
申请日：2018-11-13
申请人： EldoLAB Holding B.V.
摘要： An LED driver configured to power a plurality of LEDs having a different colour or colour spectrum is described, the LED driver comprising: a power converter configured to supply power to the plurality of LEDs and a control unit, the control unit comprising: an input terminal configured to receive an input signal representing a desired colour set-point; a processing unit configured to: determine a MacAdam ellipse for the desired colour set-point; determine a required intensity or current for each of the plurality of LEDs so as to achieve the desired colour set-point; determine a colour shift direction for the colour set-point, based on the determined required intensities or currents; select a modified colour set-point based on the colour shift direction and the MacAdam ellipse; determine a required supply current for each of the plurality of LEDs so as to achieve the modified colour set-point; determine a control signal for the power converter so as to generate the required supply currents; and wherein the control unit further comprises an output terminal for outputting the control signal to the power converter.
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公开(公告)号：US20210006168A1
公开(公告)日：2021-01-07
申请号：US16971998
申请日：2019-02-28
申请人： EldoLAB Holding B.V.
IPC分类号： H02M3/335 , H05B45/385
摘要： A power converter powers an LED fixture from a power supply, and comprises a primary circuit a primary winding; and a switch in series connection with the primary winding to in a conductive state of the switch connect the primary winding to the power supply; a secondary circuit comprising a secondary winding that is magnetically coupled with the primary winding for providing power to the LED fixture in response to a switching of the switch; the power converter further comprising: the power converter further comprising: a sensing circuit configured to generate a signal representative of the output voltage of the secondary winding, an edge of the signal representing an edge of the output voltage of the secondary winding in response to the switching of the switch; and a detecting circuit configured to derive timing data from the edges of the signal, to estimate a load of the power converter from at least one output parameter of the power converter, and to determine a momentary value of a voltage of the power supply from the timing data and the estimated load of the power converter.
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公开(公告)号：US10660177B2
公开(公告)日：2020-05-19
申请号：US15781878
申请日：2016-12-08
申请人： ELDOLAB HOLDING B.V.
IPC分类号： H05B45/37 , H05B33/08 , H02M3/335 , H05B45/385
摘要： A power converter for supplying an output voltage or an output current for powering an LED fixture is described, the power converter comprising: a primary circuit comprising: an input terminal for receiving a supply voltage; a primary winding connected to the input terminal; a secondary circuit comprising a secondary winding that is magnetically coupled with the primary winding for providing the output voltage or output current; the power converter further comprising: a sensor for measuring an electrical characteristic of the secondary circuit and; a detector configured to determine an electrical characteristic of the supply voltage based on the measured electrical characteristic of the secondary circuit.
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公开(公告)号：US10098205B2
公开(公告)日：2018-10-09
申请号：US14753269
申请日：2015-06-29
申请人： ELDOLAB HOLDING B.V.
IPC分类号： H05B37/02
摘要： A control unit for controlling an illumination parameter of one or more light sources of a plurality of light sources is described. The control unit being arranged to—select the one or more light sources of the plurality of light sources, receive an input signal representing a required value of the illumination parameter for the selected one or more light sources, convert the input signal to a broadcast signal for the plurality of light sources;—enable the broadcast signal to be provided to the plurality of light sources thereby enabling the selected one or more light sources to comply with the required value of the illumination parameter.
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