Techniques to Reduce Driving Energy of 1-Pixel Displays

Hiroyuki Manabe, Munekazu Date, Hideaki Takada, Hiroshi Inamura

Research output: Contribution to journalArticle

Abstract

We propose a pair of techniques to lower the energy consumed by driving 1-pixel liquid-crystal displays (LCDs). The first one employs multiple capacitors while the other divides the LCD into two to lower the drive voltage. Simulations show that large capacitance values and many capacitors reduce the energy consumed, and stacking two thin low voltage LCDs maximizes the effect by decreasing the overhead consumed by the microcontroller. Actual polymer-dispersed LCDs (PDLCDs) are tested to confirm that the techniques work as effectively as the simulations imply. The results show that the overall energy consumption of large PDLCDs is reduced more than 70% using multiple capacitors, and the combination of the two techniques successfully reduces the driving energy even for small LCDs. While the polarity reversal of the proposed technique does incur some delay, it was confirmed by a flicker test that the technique does not degrade image quality.

Original languageEnglish
Article number7410041
Pages (from-to)2638-2647
Number of pages10
JournalIEEE Transactions on Industry Applications
Volume52
Issue number3
DOIs
Publication statusPublished - 2016 May 1
Externally publishedYes

Keywords

  • Capacitor
  • energy consumption
  • liquid crystals

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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