We have developed high‐speed bend transition method of OCB (Optically Compensated Bend) mode TFT‐LCDs. We found out that nucleation of bend transition occurs with twist alignment. New pixel structure and driving scheme generate bend domains using “electrical twist field” which is lateral electric field to induce twist orientation of liquid crystal. The probability of bend nucleation depends on lateral twist and vertical transition electric field, and slightly depends on temperature. Growth speed of bend domain depends on the vertical transition voltage and viscosity of the liquid crystal. Bend transition time is mainly determined by the growth speed. A lower viscosity liquid crystal and a high transition voltage are preferable to achieve the high‐speed bend transition especially at low temperature. We have developed 22 inch diagonal HDTV which achieved the bend transition time to be less than 0.2 sec even at 0°C
We have newly developed a hybrid 230ppi 3D display with both auto‐stereoscopic and glasses modes using time‐sequential OCB, a 4.3inch WVGA panel, and a light directional backlight. In the auto‐stereoscopic mode we can easily see full‐resolution 3D images and in the glasses mode we can additionally see crosstalk‐free 3D images from all viewing angles. Our hybrid 3D LCD is suitable for situations where users want to easily switch the two modes.
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