行動電話節能改善-螢幕背光的效能

Improving Efficiency of LCD Backlight for Mobile Phone

陳忠信(Juang-Shin Chen)

指導教授 ： 方志鵬

國立臺北科技大學/電資學院/電資碩士在職專班研究所/碩士(2012年)

摘要

論文主要致力於行動電話節能的改善。由行動電話功率耗損的分析可知，在通話時功率放大器的功耗最大，處理器及發光二極體所產生的螢幕背光則是在非通話時主要的功耗來源，此三者構成行動電話主要的功率消耗。
再者，針對行動電話使用習慣的改變，得知行動電話之螢幕的使用時間已有逐步增加的趨勢。綜合前兩項分析，本文針對改善行動電話螢幕背光效能，增加行動電話的使用時間。
利用直流升壓轉換器的硬體架構及軟體的優化來達到效率的提升、功耗的降低。針對行動電話的三種使用模式下去做分析，並依電池實際使用狀況，探討節能的效果。

關鍵字

節能 ； 發光二極體 ； 驅動器

並列摘要

This thesis is focused on power saving of mobile phone. According to the analysis on power dissipation of mobile phone , In general, the power of mobile phone is mostly consumed on the power amplifier, processor, and LCD backlight. The LCD backlight is produced by light emitting diodes. The power amplifier consumes low power when the user is not talking, and the LCD backlight consumes low power when the screen is turns off.
With the advance of mobile technology, the mobile phone is not just a tool for remote-talking. Most of the users use the mobile phone to do things that they used to do on a personal computer. That is, the screen of phone still works even when the user is not talking using his mobile phone. The power saving of LCD backlight therefore becomes an important issue.
I have improved efficiency and reduced power dissipation by DCDC boost converter and SW optimization. And I use three mobile phone usage conditions and with battery usage to do the analysis to know the power saving result. The experimental results show that the performance of mobile phone backlight is improved and the operation time of mobile phones is increased.

並列關鍵字

power saving ； light emitting diodes ； DCDC boost converter

參考文獻

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