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1. 发明授权

US10721799B2 LED driving device, constant-power dimming circuit and dimming method thereof 有权
公开(公告)号：US10721799B2
公开(公告)日：2020-07-21
申请号：US16615129
申请日：2018-05-09
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Xiaoyu Chen , Xunsheng Deng , Bo Chen , Yanquan Mai
IPC分类号： H05B45/10 , H05B45/3725 , H05B45/40 , H05B45/345 , H05B45/325
摘要： An LED driving device and a constant power dimming circuit and dimming method therefor. The constant power dimming circuit comprises a line voltage compensation module, a modulation module, a filtering module, and a constant current source module. The line voltage compensation module detects changes in line voltage and outputs a first reference voltage. The modulation module modulates the first reference voltage and outputs to the filtering module a second reference voltage. The filtering module filters the second reference voltage signal and then outputs a third reference voltage to the constant current source module. The constant current source module outputs constant current to drive an LED load to operate. By controlling a constant current source circuit, when the duty cycle of the PWM signal is not changed but a mains input voltage is changed, the input power of the system can be maintained constant, and voltage flicker is reduced.

2. 发明申请

US20220272803A1 LED CONTROL CIRCUIT AND DEVICE COMPATIBLE WITH SILICON-CONTROLLED DIMMER, AND CONTROL METHOD 有权
公开(公告)号：US20220272803A1
公开(公告)日：2022-08-25
申请号：US17634878
申请日：2020-08-13
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： YU' AN YE , XUNSHENG DENG , BO CHEN
IPC分类号： H05B45/14 , H05B45/345 , H05B45/3575
摘要： Disclosed are an LED control circuit and device compatible with a silicon-controlled dimmer, and a control method. The LED control circuit comprises a silicon-controlled dimmer, a rectifier module, a bleeder module, a control module, a voltage detection module, and a constant-current source module. An alternating current is input to the silicon-controlled dimmer and the rectifier module and then a line voltage is output to the voltage detection module; the voltage detection module outputs a voltage detection signal to the control module according to the change of the line voltage and outputs a phase angle detection signal to the constant-current source module; the control module controls on or off of the bleeder module according to the voltage detection signal, and a bleeder current when the bleeder module is turned on is greater than a maximum charging current before the silicon-controlled dimmer is conducted.

3. 发明授权

US11019694B2 Apparatus and method for simultaneously adjusting brightness and color temperature, and LED lamp 有权
公开(公告)号：US11019694B2
公开(公告)日：2021-05-25
申请号：US16644628
申请日：2018-05-25
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Yanquan Mai , Xunsheng Deng , Bo Chen , Xiaoyu Chen , Wenpan Wang
IPC分类号： H05B45/10 , H05B45/31 , H05B45/20
摘要： An apparatus and method for simultaneously adjusting brightness and color temperature, and an LED lamp. The apparatus includes a phase control dimmer, a rectification module, a phase detection module, a current control module and an LED module. Cutting the phase of an input alternating current by the phase control dimmer changes the effective voltage of the alternating current, then the cut alternating current is rectified by the rectification module and output to the LED module, thus adjusting the brightness of the LED module; information about the cut phase is detected by the phase detection module and a current control signal is output to a current control module according to the cut phase information, and the current control module controls change in the brightness ratio of mixed colors of the LED module according to the current control signal and adjusts the color temperature of the LED module.

4. 发明申请

US20220248515A1 LED DIMMING CIRCUIT, DIMMING DEVICE, AND DIMMING METHOD 有权
公开(公告)号：US20220248515A1
公开(公告)日：2022-08-04
申请号：US17607339
申请日：2020-02-26
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： HAOMING WU , QIANQIAN WANG , XUNSHENG DENG
IPC分类号： H05B45/3575 , H05B45/325
摘要： Disclosed are an LED dimming circuit, a dimming device and a dimming method. The LED dimming circuit comprises a reference voltage source, a line voltage compensation module, a dimming module, and a constant current source module. The line voltage compensation module outputs a compensation information to the reference voltage source according to a current line voltage, the reference voltage source modulates a reference voltage according to the compensation information, and then outputs a voltage reference having the compensation information to the dimming module, the dimming module outputs, according to the voltage reference having the compensation information and an externally input dimming signal, a dimming voltage to the constant current source module, the constant current source module controls a working current of an LED lamp string according to the dimming voltage.

5. 发明申请

US20200084849A1 SYSTEM AND METHOD USING SWITCH TO REALIZE LIGHT FIXTURE DIMMING AND STATE RESTORATION 审中-公开
公开(公告)号：US20200084849A1
公开(公告)日：2020-03-12
申请号：US16616366
申请日：2018-05-09
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Yanquan MAI , Xunsheng DENG , Bo CHEN , Xiaoyu CHEN
IPC分类号： H05B33/08 , H05B37/02
摘要： A system and method using a switch to realize light fixture dimming and state restoration. The system comprises a switch, a line voltage sampling module, a switching action judging module and a dimming control module. The switch connects to at least one light fixture. The line voltage sampling module samples a rectified line voltage output and outputs a corresponding voltage level signal. The switching action judging module identifies and determines a current switching action and outputs a corresponding control instruction to the dimming control module. The dimming control module regulates the lighting state of each light fixture or controls each light fixture to return to its initial lighting state. By identifying and judging switching actions to realize light fixture dimming and state restoration control, the invention can realize a regular dimming function, and can quickly restore the light to a preset initial lighting state.

6. 发明申请

US20180270930A1 LINEAR CONSTANT CURRENT LED DRIVE DEVICE CAPABLE OF DRIVING REDUCED NUMBER OF LEDS 审中-公开
公开(公告)号：US20180270930A1
公开(公告)日：2018-09-20
申请号：US15571204
申请日：2016-04-07
申请人： Shenzhen Sendis Semiconductor Co., LTD
发明人： Xiaoyu CHEN , Bo CHEN , Xunsheng DENG , Yanquan MAI
IPC分类号： H05B37/02 , H05B33/08
CPC分类号： H05B37/02 , H05B33/0806 , H05B33/0812
摘要： A linear constant current LED drive device capable of driving reduced number of LEDs, comprises: a rectifier module, an energy storage component, a switch module, a constant current supply module, a measurement module and a control module. When voltage differences between two ends of both switch module and constant current supply module are less than according threshold voltages, control module turns on switch module, enabling rectifier module to charge energy storage component and LED string lights. When voltage difference between two ends of either switch module or constant current supply module exceeds according threshold voltage, control module turns off switch module, enabling energy storage component to charge LED string lights. So rectifier module and energy storage component supply electricity to plurality of LED string lights alternately, number of LEDs can be reduced, while maintaining high drive efficiency.

7. 发明申请

US20160037592A1 DRIVING DEVICE FOR LED AND THE DRIVING METHOD THEREOF 审中-公开
标题翻译： LED驱动装置及其驱动方法
公开(公告)号：US20160037592A1
公开(公告)日：2016-02-04
申请号：US14666368
申请日：2013-07-08
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO.,LTD
发明人： Xiaoyu Chen , Bo Chen , Xunsheng Deng , Jing Zhang , Yanquan Mai
IPC分类号： H05B33/08
CPC分类号： H05B33/083 , H05B33/0809 , H05B33/0824 , H05B33/0887 , Y02B20/348
摘要： The present invention discloses a driving device for LED and the driving method thereof, includes: a bridge rectifier, at least one LED-lamp bunch and LED-lamp group and P-type switching module and N-type driving module, and a logic controller; the LED-lamp bunch and group are connected orderly in series; the bridge rectifier's positive end connects to the LED-lamp bunch's anode, while a negative end gets grounded; the logic controller connects to the anode and cathode of LED-lamp bunch through the P-type switching module respectively, the cathode of LED-lamp group through N-type driving module, and the negative input end of the bridge rectifier; by controlling the N-type driving module and P-type switching module makes the number of lit-on LED-lamps change following the rectified input signal voltage changes; thus its efficiency is improved and easy to be integrated into chips.
摘要翻译：本发明公开了一种LED驱动装置及其驱动方法，包括：桥式整流器，至少一个LED灯串和LED灯组以及P型开关模块和N型驱动模块，以及逻辑控制器 ; LED灯串和串联有序连接; 桥式整流器的正端连接到LED灯串的阳极，而负端接地; 逻辑控制器分别通过P型开关模块连接到LED灯串的阳极和阴极，LED灯组的阴极通过N型驱动模块和桥式整流器的负输入端连接; 通过控制N型驱动模块和P型开关模块，随着整流的输入信号电压变化，点亮的LED灯的数量发生变化; 因此其效率提高并且易于被集成到芯片中。

8. 发明授权

US11297706B2 Detection circuit and device of TRIAC dimmer and detection method 有权
公开(公告)号：US11297706B2
公开(公告)日：2022-04-05
申请号：US17378445
申请日：2021-07-16
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Yu'An Ye , Xunsheng Deng , Wenpan Wang
IPC分类号： H05B45/50 , H05B45/3575 , H05B45/14 , F21S4/24 , F21Y115/10
摘要： Disclosed are detection circuit and device of TRIAC dimmer and detection method. Detection circuit comprises line voltage sampling module, peak voltage sampling module, average voltage sampling module, judgment module, bleeder module, line voltage sampling module samples line voltage, outputs sampling voltage to peak voltage sampling module and average voltage sampling module; peak voltage sampling module outputs first comparison voltage to judgment module according to sampling voltage, average voltage sampling module outputs second comparison voltage to judgment module according to sampling voltage; judgment module compares first comparison voltage with second comparison voltage and outputs control signal according to comparison result to control connection or disconnection of bleeder module; bleeder module provides discharge current for TRIAC dimmer when being connected. According to invention, problem that detection result of TRIAC dimmer is unreliable can be effectively solved, and detection accuracy is improved.

9. 发明授权

US11082936B2 Device time synchronization control method and system in wireless mesh network 有权
公开(公告)号：US11082936B2
公开(公告)日：2021-08-03
申请号：US16621592
申请日：2018-05-09
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Wenpan Wang , Yanquan Mai , Xunsheng Deng , Bo Chen
IPC分类号： H04W4/00 , H04W56/00 , H04L7/00 , H04W84/18
摘要： Device time synchronization control method in wireless mesh network, comprising: pulse converter converts input AC into periodic pulse signal; controller sends time setting instruction to adjacent node device at preset time; adjacent node device updates device time according to preset algorithm when periodic signal is on rising edge or falling edge, take updated device time as setting time and forward to other adjacent node devices before arrival of next rising edge or falling edge; other adjacent devices update own device time when periodic signal is on rising edge or falling edge; after all node devices finish updating device time, controller sends control commands, and all node devices execute synchronously upon arrival of execution time. Node devices update own time according to pulse signal changes, realizing clock synchronization and synchronization control over node devices by uniform execution time.

10. 发明授权

US10660173B2 System and method using switch to realize light fixture dimming and state restoration 有权
公开(公告)号：US10660173B2
公开(公告)日：2020-05-19
申请号：US16616366
申请日：2018-05-09
申请人： SHENZHEN SENDIS SEMICONDUCTOR CO., LTD
发明人： Yanquan Mai , Xunsheng Deng , Bo Chen , Xiaoyu Chen
IPC分类号： H05B45/00 , H05B45/10 , H05B45/37 , H05B47/16
摘要： A system and method using a switch to realize light fixture dimming and state restoration. The system comprises a switch, a line voltage sampling module, a switching action judging module and a dimming control module. The switch connects to at least one light fixture. The line voltage sampling module samples a rectified line voltage output and outputs a corresponding voltage level signal. The switching action judging module identifies and determines a current switching action and outputs a corresponding control instruction to the dimming control module. The dimming control module regulates the lighting state of each light fixture or controls each light fixture to return to its initial lighting state. By identifying and judging switching actions to realize light fixture dimming and state restoration control, the invention can realize a regular dimming function, and can quickly restore the light to a preset initial lighting state.

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