Digital time-modulation pixel memory circuit in LTPS technology

Szu Han Chen*, Ming-Dou Ker, Tzu Ming Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A digital time-modulation pixel memory circuit on glass substrate has been designed and verified for a 3-μm low-temperature polysilicon (LTPS) technology. From the experimental results, the proposed circuit can generate 4-bit digital codes and the corresponding inversion data with a time-modulation technique. While the liquid-crystal-display (LCD) panel operates in the still mode, which means the same image is displayed on the panel, a data driver for an LCD panel is not required to provide the image data of the frame by the proposed pixel memory circuit. This pixel memory circuit can store the frame data and generate its corresponding inversion data to refresh a static image without activating the data driver circuit. Therefore, the power consumption of a data driver can be reduced in the LCD panel.

Original languageEnglish
Pages (from-to)539-546
Number of pages8
JournalJournal of the Society for Information Display
Issue number8
StatePublished - 1 Aug 2011


  • Low-temperature polysilicon (LTPS)
  • Memory-in-pixel (MIP)
  • System-on-panel (SOP)
  • Time mod ulation

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