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公开(公告)号：US11350495B2
公开(公告)日：2022-05-31
申请号：US16407382
申请日：2019-05-09
发明人： Huiqiang Chen , Zhishuo Wang , Jianxin Wang
IPC分类号： H05B45/10 , H05B45/31 , H05B45/3575 , H05B45/395
摘要： An apparatus for an LED driver with a silicon-controlled dimmer, can include: a bleeder circuit coupled to a DC bus of the LED driver; and a controller configured to control the bleeder circuit to draw a bleeder current from the DC bus when a conduction angle of the silicon-controlled dimmer is less than an angle threshold, in order to maintain a conduction state of the silicon-controlled dimmer.
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公开(公告)号：US11252799B2
公开(公告)日：2022-02-15
申请号：US17127711
申请日：2020-12-18
发明人： Ke Li , Liqiang Zhu
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a phase detector configured to process information associated with a rectified voltage generated by a rectifier and related to a TRIAC dimmer, the rectified voltage corresponding to a first waveform during a first half cycle of an AC voltage and corresponding to a second waveform during a second half cycle of the AC voltage, the phase detector being further configured to generate a phase detection signal representing a first time duration during which the first waveform indicates that the rectified voltage is larger than a predetermined threshold and representing a second time duration during which the second waveform indicates that the rectified voltage is larger than the predetermined threshold; and a mode detector configured to process information associated with the rectified voltage.
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公开(公告)号：US11071184B1
公开(公告)日：2021-07-20
申请号：US16837360
申请日：2020-04-01
发明人： Rosario Chiodo , Adolfo De Cicco , Pietro Vallese
IPC分类号： H05B45/46 , H05B45/325 , H05B45/31
摘要： The disclosure describes techniques for driving a plurality of light emitting diodes (LEDs) arranged in a parallel connection by using PWM (Pulse Width Modulation) dimming. The techniques of this disclosure describe the generation and application of a fixed phase shift map to a driver matrix based on pixel position. Each pixel corresponds to an LED light source. In the fixed phase shift map, each pixel will have a pre-defined phase shift calculated to induce a determined variation in turn-on time for geometrically neighbouring pixels to spread out current demand over time during PWM dimming.
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公开(公告)号：US20210204375A1
公开(公告)日：2021-07-01
申请号：US17127711
申请日：2020-12-18
发明人： KE LI , LIQIANG ZHU
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a phase detector configured to process information associated with a rectified voltage generated by a rectifier and related to a TRIAC dimmer, the rectified voltage corresponding to a first waveform during a first half cycle of an AC voltage and corresponding to a second waveform during a second half cycle of the AC voltage, the phase detector being further configured to generate a phase detection signal representing a first time duration during which the first waveform indicates that the rectified voltage is larger than a predetermined threshold and representing a second time duration during which the second waveform indicates that the rectified voltage is larger than the predetermined threshold; and a mode detector configured to process information associated with the rectified voltage.
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公开(公告)号：US20200351997A1
公开(公告)日：2020-11-05
申请号：US16929540
申请日：2020-07-15
申请人： Aleddra Inc.
发明人： Chungho Hsia
摘要： A light-emitting diode (LED) luminaire control system comprising a control circuit is adopted to provide remote control signals to operate an external luminaire that comprises LED arrays and a power supply. The LED luminaire control system further comprises a relay switch, a remote controller, and a transceiver circuit. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send decoded commands to the LED luminaire control system to control the luminaire by turning on and off and dimming up and down the external luminaire.
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公开(公告)号：US10743381B2
公开(公告)日：2020-08-11
申请号：US16701699
申请日：2019-12-03
申请人： Siemens Schweiz AG
发明人： Johann Mensch , Jakob Reislhuber
摘要： Various embodiments include a dimmer for controlling the power consumption of a connectable load. The dimmer includes: two parallel-connected, electrically isolated dimmer channels with control devices; a main control device for the channels; a communication link from the main control device to the channel control devices; and a communication link transmitting information from a first dimmer channel to a second dimmer channel. At least one of the two dimmer channels comprises a measurement device generating information about behavior of the electricity at a location in the measurement dimmer channel. The communication link transmits that information. Starting from the measurement dimmer channel, a channel communication link leads in each case from one dimmer channel to the next dimmer channel. The dimmer determines whether respective times of respective zero crossings of a sinusoidal AC voltage applied to the respective dimmer channel are substantially synchronous.
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公开(公告)号：US20200224860A1
公开(公告)日：2020-07-16
申请号：US16641208
申请日：2018-08-21
发明人： Yaqui WEI , Qian ZHANG , Zhun LI
摘要： A light stack having an elongate body having a length extending from a proximal end to a distal end of the elongate body. A plurality of light emitting diode (LED) arrays adjustably coupled with the elongate body and arranged along the length thereof and a control module coupled with the plurality of LED arrays, wherein the each of the plurality of LED arrays is operable to pivot, thereby forming an angle relative to the elongate body. The control module configured to individually transition each of the plurality of LED arrays between a light emitting condition and a non-light emitting condition. The plurality of LED arrays configured to be adjustable to pivot on an axis at an angle relative to the elongate body.
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