Measurement and Improvement of Power Consumption for Portable Computers

• Main Authors: Yung-Chang Lin, 林永昌
• Other Authors: Ying-Wen Bai
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/25136144798197016177

碩士 === 輔仁大學 === 電子工程學系 === 94 === Abstract — Reducing the power consumption of portable computers has become very important, as it results in a longer operation time. Designers can approach the reduction of power consumption in a number of ways. First, they can use low power consumption components, such as a low-power display, a display with an adjustable backlight, a low-power processor, and a low-power disk. To verify the low power design, we must ascertain the integral structure of the power plane of portable computers, and provide an accurate and automatic measurement for the power consumption of each of the motherboard modules. Moreover, we focus on the key modules of the whole portable computer based on the power consumption, and then replace the key modules or devices with a lower powered item. In addition to the normal operation, we measure and reduce the power consumption of the “S3 (Suspend to RAM)” and “S4 (Suspend to DISK)” by redesigning and reducing the power consumption of the related circuits. Overall, our design extends the operation time for the normal operation and also extends the recharging period for the battery under the “S3” and “S4”.