DIMMING CIRCUIT

• Main Authors: HUANG JHAO-CYUAN, YEH CHIEN-NAN, CHANG CHUN-JONG, CHEN POSHEN
• Format: Patent
• Language: English; Japanese
• Published: 06.10.2016
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

PROBLEM TO BE SOLVED: To provide a dimming circuit in which problems such as light source flickering, control failure and the like are improved.SOLUTION: A dimming circuit includes a control voltage receiving module 115 and a driver module 110. The control voltage receiving module is configured to output a reference voltage Vr according to a control voltage Vd. The driver module is electrically connected to the control voltage receiving module and includes: a driver transistor QD which is configured to provide a drive current Ia to drive a light emitting module 150; a first transistor Q1 which is configured to control the driver transistor with feedback according to the reference voltage; and a feedback circuit 104 which is electrically connected between the driver transistor and the first transistor and configured to determine the operating state of the first transistor according to the drive current.SELECTED DRAWING: Figure 1 【課題】光源点滅及び制御無効等の問題を改善した調光回路を提供する。【解決手段】制御電圧Ｖｄに基づいて参照電圧Ｖｒを出力するための制御電圧受信モジュール１１５と、発光モジュール１５０を駆動するための駆動電流Ｉａを提供するためのドライバトランジスタＱＤと、参照電圧に基づいてドライバトランジスタをフィードバック制御するための第１のトランジスタＱ１と、ドライバトランジスタと第１のトランジスタとの間に電気的に接続され、駆動電流に基づいて第１のトランジスタの操作状態を決めるためのフィードバック回路１０４と、を含み、制御電圧受信モジュールに電気的に接続されるドライバモジュール１１０と、を備える。【選択図】図１