New Two-Domain TN/LCD With Identical, Symmetrical and + or - 80 degs Viewing Cone in Left, Right, Up and Down Viewing Zones

We invented a new two-domain TN/LCD 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)...

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Bibliographic Details
Main Authors: Ong, Hiap L, Wu, Yung-Hsun
Format: Report
Language:English
Subjects:
COMPENSATION FILM
COMPONENT REPORT
Crystallography
Electrooptical and Optoelectronic Devices
FOREIGN REPORTS
LIQUID CRYSTAL DISPLAY SYSTEMS
SCREENS(DISPLAYS)
TN(TWISTED NEMATIC MODE)
TWO DOMAIN
VIEWERS
VIEWING ANGLE IMPROVEMENT
WIDE ANGLES
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Summary:We invented a new two-domain TN/LCD 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 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. Presented at Display Technologies III, International Optoelectronics Symposium, Taipei, Taiwan, 26-27 Jul 2000. Pub. in Proceedings of SPIE, v4079 p160-175, 2000. ISSN 0277-786X. This article is from ADA398270 Display Technologies III Held in Taipei, Taiwan on 26-27 July 2000