IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Patents  
    Recent publications  
    Author's Guide  
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 36, Number 1, Page 51 (1992)
Thin-film-transistor liquid crystal displa...
  Full article: arrowPDF   arrowCopyright info





   

Lateral field effect in twisted nematic cells

by A. Lien, R. A. John
The lateral field existing in the ON state of a liquid crystal display (LCD) can result in an undesired reverse tilt domain in each pixel, thereby leading to poor contrast ratio of the display. As pixel size becomes smaller to meet the requirements of a high-information-content display, the problem becomes worse. In this paper, we present experimental results and theoretical analysis of the lateral field effect in the twisted nematic (TN) cell, which is most commonly used in the thin-film-transistor liquid crystal displays (TFT/LCD). The effects of various cell parameters, such as pretilt angle, bus-line-to-pixel spacing, and cell gap thickness, on the pixel reverse tilt domain and on the corresponding optical performance have been studied in detail. The results are useful for TFT/LCD design and cell fabrication.
Related Subjects: Display technology; Optoelectronic device technology