公开(公告)号：USD895547S1

公开(公告)日：2020-09-08

申请号：US29690141

申请日：2019-05-06

Applicant: Delta Electronics, Inc.

Designer： Chun-Hung Kuo ,  Po-Heng Chao ,  Jui-Ching Lee ,  Ching-Ho Chou

公开(公告)号：US20180108281A1

公开(公告)日：2018-04-19

申请号：US15474422

申请日：2017-03-30

Applicant: DELTA ELECTRONICS, INC.

Inventor： Yung-Chuan Lu ,  Ching-Ho Chou

IPC: G09F13/00 ,  H05B33/08 ,  H05B41/392 ,  H05B41/295

CPC classification number: G09F13/005 ,  H05B33/0815 ,  H05B33/083 ,  H05B41/295 ,  H05B41/3925

Abstract: An electronic ballast system for signage light includes a first lamp string, a second lamp string, a first inverter and a second inverter. The first lamp string includes at least one first lamp tube. The second lamp string is connected with the first lamp string in series, and includes at least one second lamp tube. The first inverter is connected with the first lamp string for driving illumination of the first lamp string. The second inverter is connected with the second lamp string for driving illumination of the second lamp string. A frequency difference between a frequency of the first inverter and a frequency of the second inverter is in a range between 500 Hz and 5 kHz.

公开(公告)号：US09648690B1

公开(公告)日：2017-05-09

申请号：US15141419

申请日：2016-04-28

Applicant: Delta Electronics, Inc.

Inventor： Ching-Ho Chou ,  Yung-Chuan Lu

IPC: H05B37/02 ,  H05B33/08 ,  H05B41/392 ,  H05B41/298

CPC classification number: H05B33/0845 ,  H05B33/0815 ,  H05B33/0887 ,  H05B37/02 ,  H05B41/2828 ,  H05B41/2983 ,  H05B41/3921

Abstract: A dimmable instant-start ballast for a plurality of LED lamps and/or a plurality of fluorescent lamps is provided, which includes an isolated dimming interface, a duty control device, a dimming switch, and an inverter circuit. The isolated dimming interface receives a dimming signal to generate a dimming voltage. The duty control device generates an operation signal according to the dimming voltage. The dimming switch periodically couples a first node to a ground according to the operation signal. The inverter circuit receives a rectified voltage and is coupled to the first node. When the first node is coupled to the ground terminal, the inverter circuit provides a lamp current for the LED lamps and/or the fluorescent lamps.

公开(公告)号：US20140139127A1

公开(公告)日：2014-05-22

申请号：US13789181

申请日：2013-03-07

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chang-Ching Wang ,  Ching-Ho Chou ,  Chih Lo ,  Weng-Fatt Chan

IPC: H05B41/16

CPC classification number: H05B41/28 ,  Y10S315/05

Abstract: An electronic ballast includes a converter, an inverter circuit, a controlling unit, and a current crest factor improvement circuit. The controlling unit issues a first control signal to control the converter and issues a second control signal and a third control signal with opposite enabling/disabling states to control on/off states of corresponding switch elements of the inverter circuit. During a dead time between the enabling state of second control signal and the enabling state of the third control signal, these switch elements are simultaneously in the off state. During the dead time, the current crest factor improvement circuit is triggered to generate a restraining signal. According to the restraining signal, an output power of the converter is decreased to a predetermined value in real time or the converter is suspended.

Abstract translation: 电子镇流器包括转换器，逆变器电路，控制单元和电流波峰因数改善电路。 控制单元发出第一控制信号以控制转换器并发出具有相反使能/禁止状态的第二控制信号和第三控制信号，以控制逆变器电路的相应开关元件的导通/截止状态。 在第二控制信号的使能状态和第三控制信号的使能状态之间的停滞时间期间，这些开关元件同时处于关闭状态。 在死区时间内，触发电流波峰因数改善电路产生抑制信号。 根据抑制信号，转换器的输出功率实时地减小到预定值，或者转换器被暂停。