Study on Power Management and Power Saving Control for Notebook Computer

• Main Authors: Sheng-Far Hsu, 許勝發
• Other Authors: 賴炎生
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/m2nhy6

碩士 === 國立臺北科技大學 === 電機工程系所 === 94 === The objective of this thesis is to realize the power management for notebook computer and power saving control of Central Processor Unit (CPU). The comparison results of with and without power control and power saving will be investigated. Power management of notebook computer focuses on the management of devices’ power consumption such as backlight brightness, hard disk, wireless LAN. Power saving control of CPU referring to Intel SpeedStep technology, will reduce processor’s operating voltage and operating frequency when system is under light load in order to save power. It is demonstrated by experimental results that it can achieve the most contribution which extend about 34.3% battery life by improving the backlight brightness in power management. The notebook computer which uses Intel Celeron M CPU can be extend by 36% of battery life with power saving control of CPU. If both power management and power saving control of CPU are used, can be extend by 180% of battery life for the notebook computer with Intel Pentium M CPU, and extend by 145% of battery life for Intel Celeron M CPU. It is demonstrated that notebook computer can extend it’s battery life effectively by power management and power saving control.