| Publisher | HP Labs | ||
|---|---|---|---|
| Format | 468.4KB PDF, requires Acrobat Rdr 5 | Date added | 23 Apr 2003 |
| Topics | Laptops, Portable Computers, Monitors and Displays | ||
| Downloads | 184 | ||
The utility of a mobile computer, such as a laptop, is largely constrained by battery life. The display stands out as a major consumer of battery energy, so reducing that consumption is desirable. In this paper, we motivate and study energy-adaptive display sub- systems that match display energy consumption to the functionality required by the workload/user. Through a detailed characterization of display usage patterns, we show that screen usage of a typical user is primarily associated with content that could be displayed in smaller and simpler displays with significantly lower energy use. We propose example energy-adaptive designs that use emerging OLED displays and software optimizations that we call dark windows. Modeling the power benefits from this approach shows significant, though user-specific, energy benefits. Prototype implementations also show acceptability of the new user interfaces among users.
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