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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/8627


    Title: 高效能RGB LED 背光模組驅動電源研製
    Study and Implementation of a High-Performance Driver Power Supply for RGB LED Backlight Modules
    Authors: 駱契成(Chih-Cherng Lo)
    吳冠宏(Guan-Hong Wu)
    林成泰(Cheng-Tai Lin)
    羅有綱(Yu-Kang Lo)
    邱煌仁(Huang-Jen Chiu)
    Keywords: RGB LED 背光模組
    相移式PWM 均流控制
    液晶顯示器
    零電壓切換
    RGB LED back-light module
    average-current phase-shift control
    liquid-crystal display
    zero-voltage-switching
    Date: 2008-09-05
    Issue Date: 2010-02-23 09:52:11 (UTC+8)
    Abstract: 本論文主旨為研製液晶顯示器RGB LED 背光模組
    之高效能驅動電源,DC/DC 轉換器採用半橋串聯諧振電
    路架構,供應RGB LED 背光源所需之驅動電壓,其具
    有零電壓切換特性可提高轉換效率。本文提出相移式
    PWM 均流控制策略,可藉由改變PWM 責任週期而達
    到白平衡。因為LED 的特性會隨著溫度改變,所以增加
    一偵測LED 電壓的控制電路,以避免額外的損失。最後
    設計一個實例電路,並將所量測的實驗數據結果驗證電
    源架構及控制方法的可行性。
    This thesis presents a high-performance power supply
    for driving an RGB LED backlight module of the liquid
    crystal display (LCD). A half-bridge series resonant
    converter (SRC) with zero-voltage switching is adopted as
    the DC/DC converter to drive the RGB LED arrays. A
    phase-shifted pulse width modulation (PSPWM) dimming
    control is presented to track the white-color point. Since
    the LED voltages vary with the temperature, voltage
    sensors detecting the voltage drops of the linear regulators
    are used. Then the feedback signals are sent to adjust the
    output voltage levels of the SRCs to cut down the power
    losses on the linear regulators. A prototype driver system is
    implemented. The feasibilities of the circuit topology and
    the control strategy are verified by the experimental results.
    Appears in Collections:[電機工程系所 ] 2008第七屆台灣電力電子研討會暨展覽會

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