液晶螢幕之自動調光與變頻器效率之提升

AUTOMATIC BRIGHTNESS OF LIQUID CRYSTAL DISPLAY AND IMPROVED EFFICIENCY OF INVERTER

江晉一(Chin-I Chiang)

指導教授 ： 翁慶昌

淡江大學/工學院/電機工程學系碩士在職專班/碩士(2008年)

https://doi.org/10.6846/TKU.2008.00758

摘要

本論文針對液晶螢幕背光源所使用之冷陰極燈管與變頻器搭配時，調整全橋式(Full Bridge)變頻諧振電路之串聯電容(Cs)與並聯電容(Cp)電容值的搭配，提升變頻器之效率，並實際調整串聯電容(Cs)與並聯電容(Cp)電容值，測試變頻器效率提升數據與波形，並加入環境光源感測器(Ambient Light Sensor, ALS)，使變頻器能隨環境光源自動調光，達到節省筆記型電腦上電池能量的消耗，延長筆記型電腦電池的使用時間。

關鍵字

冷陰極燈管 ； 變頻器

並列摘要

For the module of Cold Cathode Fluorescent Lamp (CCFL) and inverter using full bridge resonant in LCD backlight, the values of capacitors Cs and Cp of inverter are adjusted to get the actual data. It is proved that the work efficiency of inverter can be improved by adjusting the value of capacitors Cs and Cp. By adding the Ambient Light Sensor (ALS), the brightness of the screen of notebook PCs could be automatically adjusted with the change of environment by inverter, so as to reduce the wastage of the battery and extend it's lifetime.

並列關鍵字

Cold Cathode Fluorescent Lamp (CCFL) ； Inverter

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