Dynamic refresh-rate scaling via frame buffer monitoring for power-aware LCD management

Hyoseung Kim, Hojun Cha, Rhan Ha

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In recent years, there has been wide-spread use of large and high-resolution liquid-crystal displays (LCDs) on handheld devices. The portion of LCD power consumption in the overall system has gradually increased. While most of the previous research on LCD power management has focused on the hardware level, practical mechanisms at the software level are hardly known. This paper presents a power-aware LCD management mechanism, based on dynamic refresh-rate scaling and frame buffer monitoring. The proposed mechanism guarantees the display quality of service, which is inherently specified by content types. The mechanism does not require additional hardware or modifications to applications. The experiment results - on a commercial PDA with a 320 × 240 resolution - show that the proposed mechanisms effectively reduce the power consumption by up to 10%, while satisfying the display quality requirements for the LCD screen.

Original languageEnglish
Pages (from-to)193-206
Number of pages14
JournalSoftware - Practice and Experience
Volume37
Issue number2
DOIs
Publication statusPublished - 2007 Feb

All Science Journal Classification (ASJC) codes

  • Software

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