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34-cm Super TFT-LCD with Wide Viewing Angle

Nobutake Konishi, Electron Tube & Devices Division, Hitachi, Ltd.
Katsumi Kondo, Hitachi Research Laboratory, Hitachi, Ltd.
Hiroyuki Mano, Systems Development Laboratory, Hitachi, Ltd.

ABSTRACT

Recently, liquid crystal displays addressed by thin-film transistors (TFT-LCDs) for the notebook-type personal computer have made remarkable progress in quality. At the same time, there has been a growing demand for more large-sized displays. Therefore, TFT-LCDs have been poised for an invasion into the monitor market, which has been monopolized by the cathode-ray tube (CRT) monitor. However, this trend has been at a standstill, since the viewing angle for the LCD was narrow. We have succeeded in developing the Super TFT-LCD using the in-plane switching (IPS) mode to drastically improve the viewing angle.

The new 34-cm (13.3-inch) TFT display, which is fully extended graphics array-compatible (XGA-compatible - 1024 x 768 pixels), delivers a vertical and horizontal viewing angle of 140 degrees and has picture quality on par with that of a CRT. Our newly developed Super TFT-LCD monitor supports multi-scan for use in various scanning modes, including XGA (1024 x 768), super video graphics array (SVGA - 800 x 600), and VGA (640 x 480). Also, this LCD monitor can display clear images from a palette of 16 million colors and does not suffer from the fading, blurriness, and distortion often seen with CRT monitors.


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