The 12th International Display Research Conference Japan Display '92" was held at October 12 14 at the International Conference Center Hiroshima in Hiroshima city. More than 1100 attendees including about 300 non-Japanese came to hear 221 papers describing new results in display technologies. The conference also was the successful first conference using HDTV equipment for the oral presentations.

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Display systems have been and will continue to be playing an important role in automobiles for safety, convenience, warning systems, and so on. A few vital pieces of information such as route guidance and warnings come from on-board visual display systems, hence the importance of their design. In this paper, the requirement for the desirable display systems in the future transportation society will be discussed from the view point of vision optics. One of the most promising display systems will be advanced Head-Up Display to meet the future transportation society's ever-increasing demand for information in areas such as navigation.

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A unique surface coating on CRTs has been developed which combines Anti-Glare, Anti-Reflection and Anti-Static functions. This coating consists of three layers; the top layer with a sprayed surface of a low density and the two other layers which have smooth surface and different refractive indices. The developed coating has an inconspicuous reflected image of ambient light Practically without sacrificing resolution.

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The practical 256 gray scale technology for an ac plasma display panel has been developed through the ADS sub-field method and the newly introduced low voltage addressing technology. Performance of a 21 inch full color plasma display with 640x3 × 480 line and the integrated electronics using monolithic drivers will be presented.

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In these days,high-resolution large-sized TFT-LCDs have been developed. It is important to suppress the signal delay and the change of the pixel potential. As for high-resolution display, the high-speed switching is required. The device-simulation technique becomes more effective to design TFT-LCD. There are some issues to be solved. The conventional SPICE-simulator is not suitable to a-Si TFT. Furthermore, the simulation of the display is difficult compared to that of the IC because the simulation results must be appreciated by the human eyes. Then it is important to visualize the simulation results. In this paper, a new model of a-Si TFT is proposed and the visualized device simulator is developed. This simulation technique is appliedto the newly developed 11.8-inch diagonal TFT-LCD for XGA.

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A 3.7-in. HDTV poly-Si TFT light valve with 1024×1440 pixels for LCD projectors has been developed. This is the smallest transmissive HDTV TFT light valve yet produced. The analog data driver, which consists of 12 blocks operating at 10.5 MHz, completely integrated by TFTs on the same quartz substrate. This is the first time to fully integrate HDTV drivers by TFTs on the same substrate. The TFT circuits are optimized by the original TFT circuit simulation.

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We have improved the viewing angle characteristics of the Domain-Divided Twisted Nematic (DDTN) TFT-LCD panels by combining retadation films and normally black display mode in place of the conventional normally white mode. The viewing angle of ±80° was realized for both vertical and horizontal directions. This value is the widest ever reported. Also, we have made 10.4" new DDTN TFT-LCD panels and confirmed high quality full-color display with no image reversal characteristics.

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The causes of the crosstalk in simple-matrix LCDs have been analyzed from the viewpoint of waveform distortions of drive signals. A new driving method has been developed to reduce the distortions. In the new driving method, named "scanning-line-negative-feedback (SNF)", the distortions of drive signals on the scanning electrodes are detected and are used to control the power supply voltage for liquid crystal operation with negative feedback technique. We evaluated the crosstalk intensity using crosstalk ratio which is defined as the transmittance difference. It was confirmed that the crosstalk can be reduced in super-twisted LCDs using the SNF method.

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A New addressing technique with a high address duty ratio for obtaining high contrast ratio and some number of gray shades in RMS responding matrix LCDs ; especially the fast responding STN LCDs is presented. A new method for displaying a large number of gray shades without any flicker in RMS responding LCDs in combination with this New addressing technique is proposed.

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