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1. 发明公开

EP4216673A1 LED DRIVE CIRCUIT AND LIGHTING APPARATUS 审中-实审
公开(公告)号：EP4216673A1
公开(公告)日：2023-07-26
申请号：EP22212950.4
申请日：2022-12-12
申请人： Leedarson Lighting Co., Ltd.
发明人： LIN, Qiqiang , LIU, Zongyuan , YE, Hemu , LI, Yankun , WU, Yongqiang
IPC分类号： H05B45/345 , H05B45/375
摘要： The present invention is applicable to the field of lighting technology, and provides an LED drive circuit and a lighting apparatus. The LED drive circuit includes a first voltage input sub-circuit (11), a first non-isolated LED constant-current driver chip (U1), a first inductor (L1) and a first fly-wheel diode (D1). An input of the first voltage input sub-circuit (11) is configured to be connected with an external power supply, an output of the first voltage input sub-circuit (11) is in connection with a first end of the first inductor (L1), and the output of the first voltage input sub-circuit (11) is also configured to be connected with a negative electrode of the LED string light. A second end of the first inductor (L1) is in connection with an anode of the first fly-wheel diode (D1) and a drain of an internal MOSFET of the first non-isolated LED constant-current driver chip (U1). A cathode of the first fly-wheel diode (D1) is in connection with a power-supply pin of the first non-isolated LED constant-current driver chip (U1), and the cathode of the first fly-wheel diode (D1) is also configured to be connected with a positive electrode of the LED string light. In the present invention, power is supplied to the driver chip through the positive electrode or negative electrode of the LED string light, such that the loss of the drive circuit is effectively reduced, and the drive efficiency of the drive circuit is improved.

2. 发明公开

EP4048030A1 SILICON-CONTROLLED-RECTIFIER DIAL DUAL-DIMMING DRIVE CIRCUIT, DIMMING DRIVE DEVICE AND LAMP 有权转让
公开(公告)号：EP4048030A1
公开(公告)日：2022-08-24
申请号：EP22152202.2
申请日：2022-01-19
申请人： Leedarson Lighting Co., Ltd.
发明人： WU, Yongqiang , YE, Hemu , LIN, Qiqiang , LIU, Zongyuan , LI, Yankun
IPC分类号： H05B45/31 , H05B45/10 , H05B45/20
摘要： The present application provides a silicon-controlled-rectifier dial dual-dimming drive circuit, a dimming drive device and a lamp. A silicon-controlled-rectifier dimmer is adopted to set a corresponding conduction angle to regulate an alternating current, a dial switch module selects a dimming and color-adjusting gear to output a corresponding dimming control signal and color-adjusting control signal, a driving adjusting module adjusts a direct current output by a rectifier module according to the dimming control signal and a current output by a light source assembly, a control module generates a first pulse width modulation signal according to the color-adjusting control signal and sends the first pulse width modulation signal to a color-temperature control module, so as to adjust a switching duty ratio of the color-temperature control module, thereby adjusting the current output by the light source assembly, and the control module generates a second pulse width modulation signal according to the conduction angle of the silicon-controlled-rectifier dimmer and sends the second pulse width modulation signal to the driving adjusting module, so as to adjust the direct current, thereby simultaneously adjusting brightness and a color temperature in different application occasions, and bringing experiences of double dimming curves and different color temperatures to a user.

3. 发明公开

EP4037439A1 CONSTANT-CURRENT DRIVE CIRCUIT, CONSTANT-CURRENT DRIVE DEVICE AND LAMP 有权
公开(公告)号：EP4037439A1
公开(公告)日：2022-08-03
申请号：EP21215168.2
申请日：2021-12-16
申请人： Leedarson Lighting Co., Ltd.
发明人： YE, Hemu , ZHENG, Yisheng , LIN, Qiqiang , LIU, Zongyuan , LI, Yankun , WU, Yongqiang , ZHANG, Guitang
IPC分类号： H05B45/36 , H05B45/345 , H05B45/59
摘要： The present application relates to the field of driving technology, and provides a constant-current drive circuit, a constant-current drive device, and a lamp. The AC power is connected via a rectifier module (10) and rectified by the rectifier module (10) to generate a DC voltage signal. An electrolytic capacitor (C3) is provided at an output end of the rectifier module (10) to improve an efficiency of circuit and to eliminate a stroboscopic phenomenon in the DC voltage signal. The driver module (20) is configured to generate a constant-current driving signal according to the DC voltage signal in the discontinuous conduction mode, and adjust an output duty cycle according to the constant-current driving signal to maintain a constant current of the constant-current driving signal. The electromagnetic suppression module (30) is configured to eliminate a clutter interference signal in the DC voltage signal to improve an electromagnetic performance of the circuit. Such that problems of higher driving cost and larger size of driving space caused by an additional de-stroboscopic circuit in the circuit can be solved.

4. 发明公开

EP3890443A1 LIGHTING APPARATUS 有权
公开(公告)号：EP3890443A1
公开(公告)日：2021-10-06
申请号：EP21166825.6
申请日：2021-04-02
申请人： Leedarson Lighting Co., Ltd.
发明人： YE, Hemu , LIU, Wei
IPC分类号： H05B45/20 , H05B45/325 , H05B45/46 , H05B45/50
摘要： A lighting apparatus includes a rectifier, a constant current circuit, a first LED series, a second LED series, a third LED series and a controller. The rectifier converts an alternating current power to a direct current power. The constant current circuit generates a first driving current, a second driving current and a third driving current derived from the direct current power. The controller has a first mode to only turn on the first LED series and to turn off the second LED series and the third LED series. The controller has a second mode to adjust the first PWM signal, the second PWM signal and the third PWM signal to generate a corresponding color temperature.

5. 发明公开

EP3840537A1 LINEAR LUMINANCE ADJUSTING CIRCUIT 审中-公开
公开(公告)号：EP3840537A1
公开(公告)日：2021-06-23
申请号：EP20215561.0
申请日：2020-12-18
申请人： Xiamen Leedarson Lighting Co., Ltd.
发明人： LIN, Qiqiang , YE, Hemu , LIU, Wei
IPC分类号： H05B45/345 , H05B45/20
摘要： A linear luminance adjusting circuit includes a rectifying circuit, a constant voltage circuit, a control module, a linear constant current circuit and a hybrid luminance circuit. The rectifying circuit rectifies power from the AC power source to generate a rectified voltage. The constant voltage circuit transforms the rectified voltage into a constant voltage. The control module is electrically coupled to the constant voltage circuit. The control module generates a control signal using the constant voltage. The linear constant current circuit is electrically coupled to the rectifying circuit and the control module. The linear constant current circuit is powered up using the rectifying voltage. And the linear constant current circuit generates a linear current using the control signal. The hybrid luminance circuit is electrically coupled to the rectifying circuit and the linear constant current circuit. The hybrid luminance circuit illuminates using the linear current.

6. 发明公开

EP4037438A1 LIGHTING APPARATUS 有权转让
公开(公告)号：EP4037438A1
公开(公告)日：2022-08-03
申请号：EP22154040.4
申请日：2022-01-28
申请人： Leedarson Lighting Co., Ltd.
发明人： ZHENG, Yisheng , LIN, Qiqiang , YE, Hemu , CHEN, Yibin , LIU, Zongyuan , LI, Yankun
IPC分类号： H05B45/20 , H05B45/10
摘要： A lighting apparatus includes a light source, a silicon controlled rectifier, a rectifier and a current source circuit. The light source has multiple LED modules with different light parameters. The silicon controlled rectifier filters a filtering ratio of an input AC power to a filtered AC power. The filtering ratio is associated with a control angle by supplying a control voltage to the silicon controlled rectifier. The maintainer circuit maintains a working current to the silicon controlled rectifier even when the control angle is large causing the volume of the filtered AC power less than a threshold. The current source circuit receives the DC power. The current source circuit has a wall switch input for connecting to a wall switch. An on-off input pattern of the wall switch is detected by the current source circuit for generating multiple corresponding driving currents.

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