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1. 发明申请

US20190215919A1 METHOD OF LIGHTING DRIVER PROTECTION IN CASE OF LOSS OF NEUTRAL CONNECTION, AND LIGHTING DRIVER INCLUDING SUCH PROTECTION 审中-公开
公开(公告)号：US20190215919A1
公开(公告)日：2019-07-11
申请号：US16099233
申请日：2017-05-23
申请人： PHILIPS LIGHTING HOLDING B.V.
发明人： YUHONG FANG , XI CHEN , HARSHITHA GUDIPATI
IPC分类号： H05B33/08 , H02H11/00 , H02H9/04
CPC分类号： H05B33/089 , H02H9/041 , H02H9/048 , H02H11/001 , H05B33/0887 , Y02B20/341
摘要： A lighting driver (600, 800, 900) receives an AC Mains voltage (15), employs a rectifier (630, 830, 930) to produce a rectified voltage, and supplies an output current (665) to a lighting device (20) in response to the rectified voltage. A surge protection circuit (840, 940) of the lighting driver includes a voltage clamping device (MOV2) connected across the output of the rectifier, and a differentiator circuit (843/845/847/849, 943/945/947/949) configured to differentiate between a temporary voltage spike at the input to the rectifier and a loss of neutral connection to the lighting driver. When a temporary voltage spike is detected, the voltage clamping device is activated to clamp the rectified voltage until the temporary voltage spike ends. When a loss of neutral is detected, the voltage clamping device is latched into a disabled state until the AC Mains voltage input to the lighting driver is turned off.

2. 发明申请

US20180263088A1 LED Driver with Comprehensive Fault Protections 审中-公开
公开(公告)号：US20180263088A1
公开(公告)日：2018-09-13
申请号：US15976177
申请日：2018-05-10
申请人： Dialog Semiconductor Inc.
发明人： Enzhu Liang , Yuwen Wang , Ming Gu
IPC分类号： H05B33/08 , G01R31/44
CPC分类号： H05B33/089 , G01R31/44 , Y02B20/341
摘要： The embodiments disclosed herein describe a set of fault detection circuits for LED circuits in an LED channel. A first fault detection circuit is configured to detect a short fault across one or more LEDs. A second fault detection circuit is configured to detect an open fault across an LED. A third fault detection circuit is configured to detect a short across an LED channel transistor. A fourth fault detection circuit is configured to detect an LED channel sense resistor open fault. A fifth fault detection circuit is configured to detect if the LED channel is being intentionally unused. These fault detect circuits can be implemented in a fault detection integrated circuit coupled to the LED channel.

3. 发明申请

US20180213618A1 POWER SUPPLY SYSTEM AND VOLTAGE OUTPUT MODULE 审中-公开
公开(公告)号：US20180213618A1
公开(公告)日：2018-07-26
申请号：US15867711
申请日：2018-01-11
申请人： FSP TECHNOLOGY INC.
发明人： Tung-Jung Chuang , Shung-Hung Wu
IPC分类号： H05B33/08 , H02J9/00
CPC分类号： H05B33/089 , G06F1/26 , H02J9/00 , H02M3/00 , H05B33/0815 , Y02B20/341
摘要： A power supply system includes at least a first power supply and a second power supply and a voltage output circuit. The first power supply provides a first set of signals while the second power supply provides a second set of signals. The voltage output circuit includes a first input terminal, a second input terminal, a first output terminal, a switch circuit and a control circuit. The first input terminal receives a first voltage signal of the first set of signals while the second input terminal receives a second voltage signal of the second set of signals, the switching circuit couples between the first and the second input terminal and the first output terminal, and the control circuit activates a first or second transistor according to a voltage difference between the first and second input terminal to generate a first output voltage signal on the first output terminal.

4. 发明授权

US10018858B2 Display device and short circuit test method 有权
公开(公告)号：US10018858B2
公开(公告)日：2018-07-10
申请号：US15400447
申请日：2017-01-06
申请人： Samsung Display Co., Ltd.
发明人： Kyong-Tae Park
IPC分类号： G01R31/28 , G01R31/26 , H01L21/66 , G02F1/13 , H01L27/12 , H01L27/32 , H05B33/08
CPC分类号： G02F1/1309 , G01R31/2841 , G01R31/44 , G09G3/006 , G09G3/3233 , G09G2300/0413 , G09G2330/04 , G09G2330/08 , G09G2330/10 , G09G2330/12 , H01L22/30 , H01L27/1244 , H01L27/3276 , H05B33/086 , H05B33/0887 , H05B33/0896 , Y02B20/341
摘要： A display device includes a substrate, one line on the substrate, the one line extending from a peripheral region through a display region, pixels on the display region, the pixels being connected to the one line, an outer line on the peripheral region, the outer line being connected to the one line during a short circuit test process that detects a position of a short circuit defect, an electrostatic protection resistor on the peripheral region, the electrostatic protection resistor being connected to the outer line, a pad on the peripheral region, the pad being connected to the outer line through the electrostatic protection resistor, a short circuit test signal being applied to the pad during the short circuit test process, and a bypass line connecting a node between the pad and the electrostatic protection resistor to the outer line.

5. 发明申请

US20180160515A1 LIGHTING CIRCUIT AND VEHICLE LAMP HAVING THE SAME 有权
公开(公告)号：US20180160515A1
公开(公告)日：2018-06-07
申请号：US15887802
申请日：2018-02-02
申请人： KOITO MANUFACTURING CO., LTD.
发明人： Tomoyuki Ichikawa
IPC分类号： H05B37/03 , B60Q11/00 , H05B33/08 , B60Q1/14 , B60Q1/00
CPC分类号： H05B37/03 , B60Q1/0088 , B60Q1/1415 , B60Q11/005 , H05B33/0815 , H05B33/089 , Y02B20/341
摘要： A lighting circuit for a light source includes a drive circuit that supplies a lamp current to the light source, detects the lamp current, and executes feedback control such that the lamp current approaches a target current, and an overcurrent protection circuit that is inserted between the drive circuit and the light source and that restricts the lamp current flowing into the light source so that the lamp current does not exceed an overcurrent threshold value. The overcurrent protection circuit includes a transistor, an inductor, a rectifier, a current sensor that generates a current detection signal according to the lamp current, and an overcurrent protection controller that controls ON/OFF of the transistor based on the current detection signal and the overcurrent threshold value. The transistor, the inductor and the rectifier are disposed in a T-shape.

6. 发明申请

US20180160502A1 USER INTERFACE FOR CONTROLLING INTENSITY AND COLOR OF A LIGHTING LOAD 审中-公开
公开(公告)号：US20180160502A1
公开(公告)日：2018-06-07
申请号：US15832532
申请日：2017-12-05
申请人： Lutron Electronics Co., Inc.
发明人： Craig Alan Casey , Thomas M. Shearer
IPC分类号： H05B33/08
CPC分类号： H05B33/0863 , H01H15/02 , H01H23/02 , Y02B20/341
摘要： A load control device may be configured to provide a user interface for controlling the intensity and/or color of one or more lighting loads. The user interface may include separate actuation members for setting the intensity and/or color of the lighting loads. The user interface may include one actuation member configured to operate in an intensity and/or color control mode. The control mode of the actuation member may be set via a button, a lever, a rotary switch, a rotary knob, etc. The user interface may include a touch sensitive element capable of sensing a user's touch and translate the touch into a control signal. Feedback may be provided on the user interface to indicate the type of control being adjusted and/or amount of control being applied to the lighting loads.

7. 发明授权

US09992839B2 Control system for color temperature regulation of LED lights 有权
公开(公告)号：US09992839B2
公开(公告)日：2018-06-05
申请号：US15469042
申请日：2017-03-24
申请人： Guangyi Wu
发明人： Guangyi Wu
IPC分类号： H05B37/00 , H05B33/08
CPC分类号： H05B33/0857 , H05B33/0809 , H05B33/0815 , H05B33/0845 , H05B33/0887 , Y02B20/341
摘要： The present invention discloses a control system for color temperature regulation of LED lights, comprising an AC input and a rectifying circuit. The rectifying circuit is connected with an absorption circuit; the absorption circuit is connected with a current regulation control module; a detection circuit is disposed between the current regulation control module and the absorption circuit; the current regulation control module is connected with a cold color series LED light module and a warm color series LED light module in parallel; and the cold color series LED light module and the warm color series LED light module generate a voltage difference. According to the present invention, through the configuration where the cold color series LEDs and the warm color series LEDs generate different voltages at different currents, the cold color series LED light module and the warm color series LED light module generate different voltage drops at different currents by means of the arrangement of resistors, achieving the effects of changing color temperature and regulating light. The process of the color temperature change is natural and smooth, enhancing visual comfortableness for users. Meanwhile, the control system for color temperature regulation of LED lights has a simple structure and is low in cost.

8. 发明申请

US20180146529A1 CONSTANT CURRENT POWER SUPPLY WITH A PLURALITY OF CURRENT OUTPUTS FOR LED LAMPS 审中-公开
公开(公告)号：US20180146529A1
公开(公告)日：2018-05-24
申请号：US15819912
申请日：2017-11-21
申请人： Wanjiong Lin , Self Electronics Co., Ltd. , Self electronics USA Corporation
发明人： Xuejun Zou
IPC分类号： H05B33/08 , H02M3/335
CPC分类号： H05B33/0887 , H02M1/08 , H02M1/32 , H02M3/33523 , H02M3/33576 , H02M2001/0009 , H05B33/0815 , H05B33/089 , Y02B20/341
摘要： A constant current power supply with a plurality of current outputs for LED lamps includes a DC/DC control module, an overvoltage detection circuit, a current sampling resistor, at least one output current conversion circuit and at least one overvoltage protection resistor. The output current conversion circuit includes a switch, a MOS transistor with a grid electrode electrically connected to the switch, and a current conversion sampling resistor. The overvoltage protection resistor is connected in series between the two voltage sampling resistors and the grid electrode of the MOS transistor. The constant current power supply of the present invention can output various current values through the output current conversion circuit so as to be able to adapt to different LED loads. One power supply can be applied in a variety of applications.

9. 发明申请

US20180146521A1 LED LIGHTING DEVICE 审中-公开
公开(公告)号：US20180146521A1
公开(公告)日：2018-05-24
申请号：US15876448
申请日：2018-01-22
申请人： LUMENS CO., LTD.
发明人： Myeong-Kook GONG , Kyung Ho YOO , Kil Ho CHOO , Jong Il KIM , Young June LEE , Seung Jong HAN , Yong-Wook CHO
IPC分类号： H05B33/08 , H05B37/02
CPC分类号： H05B33/083 , H05B33/0812 , H05B33/0815 , H05B33/0845 , H05B33/0854 , H05B37/0227 , Y02B20/341
摘要： The purpose of the present invention is to reduce heat generated through a switching IC circuit in order to protect a switching IC circuit by connecting a resistor to an LED unit in which a plurality of LEDs are connected so as to disperse heat in the resistor when a rated voltage or more is inputted. To this end, the LED lighting device comprises: a rectification circuit unit for receiving input power from a power source unit and outputting a rectified power; an LED unit having a plurality of LED channels connected in series and a resistor unit connected to the last end of the LED channels; a current sensing resistor; and a switch circuit unit comprising a plurality of switches, wherein an nth switch is connected to the rear end of an nth LED channel so as to control an operation of the nth LED channel and is controlled by a sum of a current of the nth switch and a current of an (n+1)th switch, which flows through the current sensing resistor.

10. 发明申请

US20180100644A1 LED TUBE LAMP 审中-公开
公开(公告)号：US20180100644A1
公开(公告)日：2018-04-12
申请号：US15837122
申请日：2017-12-11
申请人： JIAXING SUPER LIGHTING ELECTRIC APPLIANCE CO., LTD
发明人： Aiming Xiong , Xintong Liu
IPC分类号： F21V25/02 , F21K9/272 , F21K9/278 , F21V3/02 , F21V15/015 , F21V23/02
CPC分类号： F21V25/02 , F21K9/272 , F21K9/278 , F21V3/02 , F21V15/015 , F21V23/023 , F21V29/10 , F21Y2103/10 , F21Y2115/10 , H05B33/0815 , H05B33/0845 , H05B33/0857 , H05B33/0884 , H05B33/089 , Y02B20/341
摘要： A ballast-bypass type LED tube lamp is provided herein, which implements the safety function for protecting the user from electric shock since it conducts only when both ends thereof have been correctly installed into a lamp socket. The ballast-bypass type LED tube lamp includes a lamp tube, two end caps, an LED module and a power supply module. The power supply module includes a detection module for temporarily conducting two detection terminals of the detection module during a detection stage, so that a pulse current is generated when the LED tube lamp is powered on. The detection module performs a detection based on the pulse current, so as to determine whether to conduct or cut off a current path between the first and the second detection terminals after the detection stage.

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