30 June 2000 New two-domain TN/LCD with identical, symmetrical, and ±80-deg. viewing cone in left-, right-, up-, and down-viewing zones
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Abstract
We invented a new two-domain TN/LCD with excellent viewing performance with identical, symmetrical 160 degree(s) (+/- 80 degree(s)) 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 TN/LCD where the LC alignments are oriented in the two diagonal directions. In this special two-domain TN/LCD, 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.
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Hiap L. Ong, Yung-Hsun Wu, "New two-domain TN/LCD with identical, symmetrical, and ±80-deg. viewing cone in left-, right-, up-, and down-viewing zones", Proc. SPIE 4079, Display Technologies III, (30 June 2000); doi: 10.1117/12.389403; https://doi.org/10.1117/12.389403
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