43.1: Invited Paper: UB-FFS: New Materials for Advanced Mobile Applications

In the recent years, displays for mobile electronic devices have been revolutionized, mostly driven by smartphones and tablets. Strongest trends are (besides growing sizes) the ever‐increasing resolution, improved contrast, very good viewing angle and color performance. This went hand in hand with a...

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Bibliographic Details
Published in:SID International Symposium Digest of technical papers 2015-06, Vol.46 (1), p.645-647
Main Authors: Engel, Martin, Bernatz, Georg, Götz, Achim, Hirschmann, Harald, Lee, Sang-Kyu
Format: Article
Language:English
Subjects:
Anisotropy
Dielectrics
Displays
FFS
Liquid Crystal
Merck
Switching
Tablet computers
Transmittance
Trends
UB-FFS
Viewing
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Summary:In the recent years, displays for mobile electronic devices have been revolutionized, mostly driven by smartphones and tablets. Strongest trends are (besides growing sizes) the ever‐increasing resolution, improved contrast, very good viewing angle and color performance. This went hand in hand with a trend to more “refined” display technologies, namely fringe field switching (FFS). Now, as the latest step, Ultra‐Brightness (UB‐) FFS is at the brink to widespread commercialization in mobile and IT displays. It can provide transmittance improvement of more than 15%. The Liquid Crystal (LC) plays a key role here, because UB‐FFS uses LCs with negative dielectric anisotropy — whereas “traditional” FFS uses LCs with positive dielectric anisotropy. There are two key challenges. First is providing LCs with a fast switching speed. Second point is keeping the high reliability level of FFS even though completely different materials with much higher challenges on reliability are used. In this paper the recent progress for both key points will be discussed.
ISSN:0097-966X
2168-0159
DOI:10.1002/sdtp.10235