Seong-Mo Hwang

Novel wide viewing liquid crystal display with improved off-axis image quality in a twisted nematic configuration

We developed a novel twisted nematic (TN) liquid crystal display (LCD) having wide viewing angle characteristics through the reduction of the residual liquid crystal phase retardation at oblique angles using an embedded diffusing unit. Compared to a conventional TN panel, this embedded approach provides extended isocontrast contours by more than ±10 deg at a contrast ratio of 100:1 along the horizontal direction and a wide region free of grayscale inversion by a factor of 2 along the vertical direction. Moreover, the off-axis image distortions in our novel LCD are improved by 50% compared to those in a film-compensated TN LCD.

P‐76: Highly Efficient Backlight Unit with a Polarization‐Separating Anisotropic Layer

We have developed a highly efficient backlight unit (BLU) with a polarization-separating anisotropic layer on which asymmetric microstructures were embossed. Our BLU provides the polarized light along the direction normal to the anisotropic layer and has over 30% higher luminance than a BLU adopting a reflective polarizer.

Polarized Light Out-coupling in Backlight by Collimating the Beam into Lightguide Plate

Abstract We developed a new configuration of polarized light out‐coupling lightguide plate (LGP) in the LCD backlight. By collimating the light into the LGP, one linear polarization component experienced total internal reflection at the planar interface of LGP and anisotropic layer, whereas the orthogonal polarization was out‐coupled along the normal direction through a birefringent layer and subsequent isotropic microstructures.

10-Gbps uncooled DFB LD module by the optimal EOTM design

The optimized 10 Gbps uncooled DFB LD module is achieved and its performance is verified by transmission experiments over 20 km of conventional single mode fiber. The module output power is +2 dBm and extinction ratio is over 7 dB at 10 Gbps and 75degC