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公开(公告)号：US20230180364A1
公开(公告)日：2023-06-08
申请号：US18053873
申请日：2022-11-09
发明人： LIQIANG ZHU , QIAN FANG , ZHILIN FAN , KE LI
IPC分类号： H05B45/355 , H05B45/14
CPC分类号： H05B45/355 , H05B45/14
摘要： System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.
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公开(公告)号：US20220394828A1
公开(公告)日：2022-12-08
申请号：US17742284
申请日：2022-05-11
发明人： KE LI , ZHUOYAN LI , LIQIANG ZHU
IPC分类号： H05B45/14 , H05B45/325 , H05B45/34
摘要： System and method for dimming control. For example, the system for dimming control includes: a signal converter configured to receive a dimming signal and convert the dimming signal to a converted signal associated with a first duty cycle; and a current controller configured to receive the converted signal and determine a magnitude of a current that flows through one or more light sources based at least in part on the converted signal; wherein the signal converter is further configured to: receive an analog voltage signal as the dimming signal; and convert the analog voltage signal to the converted signal based at least in part on the analog voltage signal; wherein the signal converter is also further configured to: receive a pulse-width-modulation signal as the dimming signal; and convert the pulse-width-modulation signal to the converted signal based at least in part on the pulse-width-modulation signal.
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3.发明公开公开(公告)号：US20230225028A1
公开(公告)日：2023-07-13
申请号：US18081528
申请日：2022-12-14
发明人： ZHUOYAN LI , KE LI , LIQIANG ZHU
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a power supply controller configured to receive a cathode voltage from a cathode of a diode, the diode including an anode configured to receive a rectified voltage generated by a rectifying bridge, the power supply controller being further configured to generate a first signal based at least in part on the cathode voltage; and a driver configured to receive the first signal and generate a second signal based at least in part on the first signal, the driver being further configured to output the second signal to a gate terminal of a transistor, the transistor including a source terminal coupled to the driver and a first resistor, the transistor further including a drain terminal coupled to the one or more light emitting diodes and an output capacitor connected to the cathode of the diode.
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4.发明申请公开(公告)号：US20220210880A1
公开(公告)日：2022-06-30
申请号：US17545752
申请日：2021-12-08
发明人： KE LI , ZHOUYAN LI , LIQIANG ZHU
IPC分类号： H05B45/14 , H05B47/165 , H05B45/39 , H05B45/345
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.
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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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6.发明申请公开(公告)号：US20210153313A1
公开(公告)日：2021-05-20
申请号：US17074303
申请日：2020-10-19
发明人： KE LI , ZHUOYAN LI , LIQIANG ZHU
IPC分类号： H05B45/14 , H05B45/345 , H05B45/39 , H05B47/165
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.
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7.发明公开公开(公告)号：US20240049371A1
公开(公告)日：2024-02-08
申请号：US18220584
申请日：2023-07-11
发明人： KE LI , ZHUOYAN LI , LIQIANG ZHU
IPC分类号： H05B45/14 , H05B47/165 , H05B45/39 , H05B45/345
CPC分类号： H05B45/14 , H05B47/165 , H05B45/39 , H05B45/345
摘要： System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.
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公开(公告)号：US20240008151A1
公开(公告)日：2024-01-04
申请号：US18144096
申请日：2023-05-05
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：US20220225480A1
公开(公告)日：2022-07-14
申请号：US17554306
申请日：2021-12-17
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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