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  • 學位論文

脈波型自動光功率迴授控制積體電路之設計

Pulse Driving Integrated Circuit Design for Automatic Light Emitting Diode Photon Power Feedback Control

指導教授 : 孫台平
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摘要


本論文主要是述說如何設計自動電流控制電路與自動功率控制電路,利用迴授的原理,來降低溫度對系統的影響,並修正因溫度而改變的發光功率。本系統與其他電路最大的差異,在於不需光二極體迴授控制,就能使發光二極體的功率維持;所以吾人使用乘法器來量測發光二極體的消耗功率,近而達到光功率控制的成效。自動功率控制電路能使發光二極體於直流模式下,工作在溫度10℃至50℃光功率維持一定。自動功率控制電路在脈波模式下亦能穩定的工作,且脈波寬度越小,受溫度影響越小,所以吾人使發光二極體操作在10%的脈波模式下,近而能使發光二極體的工作電流提高到100mA,並証實工作溫度從10℃至70℃發光功率還能維持固定。

並列摘要


The main purpose of this thesis is to design automatic current control and power control circuit with using feedback principle to reduce temperature effects on system. The major difference between our circuits and other circuits are that the circuit doesn’t need photodiode feedback control to maintain the power of LED. Therefore, we use multiplier to achieve automatic light power control. Automatic power control circuit can maintain a fixed light power of LED at temperature from 10℃ to 50℃ in DC mode. Automatic power control circuit can also work well in pulse mode. And the smaller the pulse width, the smaller the temperature effects, therefore, we make LED to operate at 10% of pulse mode that can operate current up to 100mA and light power still can be maintained at the operation temperature from 10℃ to 70℃.

參考文獻


[1] 林志勳,“LED市場及應用發展”, 工業技術研究院產業經濟與趨勢研究中心, May 2007。
[2] 周一德,“鋒芒畢露的LED產業”,產業雜誌,May 2006。
[3] Jeff Y. Tsao, “Solid-state lighting”, IEEE Circuits & Devices Magazine, 2004.
[4] E. Fred Schubert and Jong Kyu Kim, “Solid-state light sources getting smart”, Science, 2005.
[5] 方 煒,饒瑞佶,“高亮度發光二極體於生物產業之應用”。

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