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公开(公告)号：US20240266800A1
公开(公告)日：2024-08-08
申请号：US18565135
申请日：2022-05-30
申请人： SIGNIFY HOLDING B.V.
CPC分类号： H01S5/06216 , H01S5/0428 , H01S5/0617 , H01S5/06804 , H01S5/06808 , H01S5/183 , H05B45/325
摘要： A laser circuit has a current source for delivering current to a laser device. A pulse width modulation laser drive current is used, and the amplitude and duty cycle of the laser drive current is set in dependence on an estimated junction temperature. In this way efficiency may be kept high for different operating temperatures and a desired optical output power.
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公开(公告)号：US20220397243A1
公开(公告)日：2022-12-15
申请号：US17773762
申请日：2020-11-03
申请人： SIGNIFY HOLDING B.V.
发明人： ANDREAS FELIX ALFRED BLUSCHKE , RIFAT ATA MUSTAFA HIKMET , KARNEKUMAR ARULANDU , TIES VAN BOMMEL
摘要： The one or more LED filaments (110) are arranged to form an inner space. At least one of the one or more LED filaments (110) is arranged as a LiFi transmitter. The LiFi device (100) further comprises a light sensor (120) arranged within the inner space. The light sensor (120) is arranged as a LiFi receiver. The LiFi device further comprises an envelope arranged to envelope the one or more LED filaments (110) and the light sensor (120). The one or more LED filaments (110) are further arranged such that the LED filament light is directed towards the envelope.
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公开(公告)号：US20210007193A1
公开(公告)日：2021-01-07
申请号：US16982556
申请日：2019-03-25
申请人： SIGNIFY HOLDING B.V.
IPC分类号： H05B45/14 , H05B45/50 , H05B45/3725 , H05B45/397
摘要： A lighting unit which includes a driver, a light source and a buffer capacitor of an auxiliary circuit (such as an independent active electronic circuit). The charging current allowed to flow to the buffer capacitor is controlled based on sensed currents flowing to the light source thereby to control the charging current of the buffer capacitor. In this way, large inrush currents caused by the use of a large buffer capacitor at the output of the driver can be avoided and the triggering of a fault detection mode within the driver can be prevented. Furthermore this circuit ensures that the driver is operated within the specification limits during start-up.
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公开(公告)号：US20240271998A1
公开(公告)日：2024-08-15
申请号：US18568420
申请日：2022-06-03
申请人： SIGNIFY HOLDING B.V.
CPC分类号： G01J1/44 , G01K7/22 , G01J2001/444 , G01J2001/4466
摘要： A bias circuit (100) of an avalanche photodiode, APD, comprising: a voltage conversion module (110) connected to the APD, wherein the voltage conversion module (110) is configured to convert an input supply voltage (Vin) to a bias voltage for the APD; an error amplifier (120) connected to the voltage conversion module (110) for implementing a feedback control; a voltage feedback loop (130) configured to provide the error amplifier (120) a first analog signal related to the bias voltage; and a current feedback loop (140) configured to provide the error amplifier (120) a second analog signal related to the APD current; wherein the error amplifier (120) is configured to control the voltage conversion module (110) based on the first and the second analog signals.
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公开(公告)号：US20230224038A1
公开(公告)日：2023-07-13
申请号：US18014681
申请日：2021-06-23
申请人： SIGNIFY HOLDING B.V.
IPC分类号： H04B10/116
CPC分类号： H04B10/116
摘要： High-speed optical communication is very attractive to satisfy high throughput applications. In the meanwhile, it is also desirable to reduce the energy waste resulted from an idle state of the optical transceivers of the communication system. The present invention discloses that both the access point (1200) and the end point device (1100) can operate in at least two different operation states, a normal operation state and a low power state. The low power state is a default state, and the normal operation state is enabled only when a valid trigger is detected. To establish a high-speed optical link (60), the end point device (1100) first sends an optical trigger signal (50) to the access point (1200) in the low power state. The access pint (1200) switches to the normal operation state only when a valid trigger signal is identified after detecting the optical trigger signal (50).
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公开(公告)号：US20240334570A1
公开(公告)日：2024-10-03
申请号：US18283053
申请日：2022-03-15
申请人： SIGNIFY HOLDING B.V.
发明人： REINHOLD ELFERICH , OLEXANDR VALENTYNOVYCH VDOVIN , DOMINIQUE MARIA BRULS , EUGEN JACOB DE MOL , HUGO JOHAN CORNELISSEN , KARNEKUMAR ARULANDU , MATTHIAS WENDT , TIES VAN BOMMEL
IPC分类号： H05B45/48 , H05B45/10 , H05B45/20 , H05B45/325 , H05B45/33 , H05B45/335
CPC分类号： H05B45/48 , H05B45/10 , H05B45/20 , H05B45/325 , H05B45/33 , H05B45/335
摘要： A lighting circuit comprises a first light source arrangement and a second light source arrangement, of different types, in series. A driver delivers a controllable current to the light source circuit, with an adjustable DC component and an adjustable modulated component, for example an adjustable duty cycle of a superposed pulse width modulated component. This enables control of the contributions to the overall light output flux from the different types of light source.
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公开(公告)号：US20240306275A1
公开(公告)日：2024-09-12
申请号：US18280734
申请日：2022-02-28
申请人： SIGNIFY HOLDING B.V.
CPC分类号： H05B45/37 , H02M3/07 , H02M3/33507 , H05B45/40
摘要： A power converter for compensating voltage variation in a circuit, the circuit comprising: a power stage arranged for receiving a mains input and for converting the mains input into a direct current, DC, output for driving a load; and a first buffer capacitor connected in a parallel branch with the load; wherein the power converter comprises an output capacitor connected in series with the first buffer capacitor, wherein the output capacitor is arranged for connecting in series with the first buffer capacitor in said parallel branch with the load; wherein the power converter comprises a second buffer capacitor arranged for connecting in series with the first buffer capacitor; and wherein the power converter is configured to charge the output capacitor from the second buffer capacitor, when the DC output is below a predetermined threshold.
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