New Two-Domain TN/LCD With Identical, Symmetrical and + or - 80 degs Viewing Cone in Left, Right, Up and Down Viewing Zones
KOPIN CORP WESTBOROUGH MA
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We invented a new two-domain TNLCD with excellent viewing performance with identical, symmetrical 160 degrees plus or minus 80 degrees viewing cone in all four major viewing zones. The display also showed excellent color tracking and no gray scale reversal. Each sub-pixel is twisted nematic TN based with the LC alignments oriented in the horizontal and vertical directions. This is different from the conventional TNLCD where the LC alignments are oriented in the two diagonal directions. In this special two-domain TNLCD, the two sub-pixels show complementary asymmetrical horizontal and vertical viewing zones. Thus the combined two-domain effects show symmetrical and identical optical performances in the four major viewing zones. The viewing angle and display performances can be further improved by optical compensation films, in particular, the combination of types A and C films to enlarge the viewing angles in the diagonal viewing directions.
- Electrooptical and Optoelectronic Devices