Cell panel electrical test for evaluating the electrical characteristics of liquid crystal displays

Yasuhiro Miyake, Atsuto Ota, Hidekazu Nishimura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Electrical models of liquid crystal display (LCD) have been studied and used in design simulation. Using the right LCD models is indispensable to accomplish high-quality and highly reliable LCDs. This paper presents a cell panel electrical test (Cell-E Test) for evaluating the electrical characteristics of LCDs. The Cell-E Test was derived from in-process electrical testing for thin film transistor arrays, and utilizes charge measurement for measuring the capacitance value of a pixel. The capacitance-voltage (C-V) and capacitance-time (C-t) characteristics can be measured using a sweeping-applied voltage and based on the period of applying voltage in the Cell-E Test. In this study, actual C-V and C-t characteristics were measured by applying the Cell-E Test to a twisted-nematic active-matrix LCD (TN AM-LCD). The parameters of liquid crystal models were extracted from the data measured using the least-squares method, to show that design models can be verified with the actual parameters of cell panels through the Cell-E Test.

Original languageEnglish
Pages (from-to)17-21
Number of pages5
JournalJournal of Information Display
Volume16
Issue number1
DOIs
Publication statusPublished - 2015 Jan 2

Keywords

  • cell panel electrical test
  • electrical model
  • electrical test
  • liquid crystal display
  • parameter extraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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