Programmed driving waveforms for quick-response liquid powder displays

Chang Jing Yang, Yung Fang Chen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A low optical contrast ratio is the major drawback of quick-response liquid powder displays (QRLPDs). In this paper, the electro-optical response of the QRLPD is analyzed, and better optical contrast is found to be obtained if the display is driven by pulse number modulation (PNM). However, PNM driving requires a longer driving duration. To achieve a successful trade-off between image contrast and driving duration, the QR-LPD requires a customized driving waveform. A programmed driving waveform and a design process are proposed. Experimental results show that the programmed driving waveform reduces the driving duration by up to 36.5% compared to conventional methods.

Original languageEnglish
Article number5681069
Pages (from-to)2043-2046
Number of pages4
JournalIEEE Transactions on Consumer Electronics
Issue number4
StatePublished - Nov 2010


  • Driving waveform
  • Electrophoretic display (EPD)
  • Pulse number modulation (PNM)
  • Quickresponse liquid powder display (QR-LPD)


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