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1. (WO2013143267) SEGMENTED DIMMING CONTROL CIRCUIT OF ELECTRONIC BALLAST USED IN FLUORESCENT LAMP

Pub. No.:    WO/2013/143267    International Application No.:    PCT/CN2012/082146
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Fri Sep 28 01:59:59 CEST 2012
IPC: H05B 41/38
Applicants: SHANGHAI ARCATA ELECTRONICS INC.
上海阿卡得电子有限公司
Inventors: ZHNAG, Hua
张华
YNAG, Jianwen
杨建文
MAO, Songling
毛松领
Title: SEGMENTED DIMMING CONTROL CIRCUIT OF ELECTRONIC BALLAST USED IN FLUORESCENT LAMP
Abstract:
A segmented dimming control circuit of electronic ballast used in a fluorescent lamp. A time-settable transition segment having a brightness level is used for switching between bright and dark brightness levels, wherein the transition segment brightness level is constant or gradually changing, which is realized by a circuit (4) control formed by a light adjusting control switch (K2), a time delay circuit (3) and the light adjusting signal. The segmented dimming control circuit for the electronic ballast for the fluorescent lamp has the following advantages that the segmented dimming mode using a transition segment with a constant or gradually changing brightness for switching between a high brightness and a low brightness can weaken the visual impact of the brightness switching operation on eyes of a user, and the circuit is simple in structure and easy to operate.