In this paper, we discuss about the light leakage mechanism in the dark state of ADS mode LCDs. Based on the stress-optic law，we analyzed the phenomenon through several experiments and simulations. We have concluded that the main reason of the light leakage is the combined effect of the retardations from the stressed glass and the liquid crystal layer.

In the paper, we have improved the dark state light leakage caused by glass retardation from average level 2.4 to level 1.2 in ADS mode LCDs. We proposed several methods to reduce light leakage, including how to reduce stress between PS and array substrate and LC optical retardation Δnd optimization. All these proposed methods can be explained by glass stress and photo elastic theory.

Characteristic dark domains are observed around the tips of electrodes in in-plane switching-mode liquid crystal displays. In these domains, the liquid crystal molecules rotate in the reverse direction because of the radially distorted electric field. We found that these domains extend toward the central area when a higher voltage is applied. This article discusses these reverse-rotational domains.

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Recently, numerous researches have been made on data compression for digital facsimile transmission and several papers reported on the coding system in which certain signal processing is applied to the local part of the original image before encoding. This facilitates the encoding and improves the data compression rate. This paper proposes a new system which utilizes a signal processing based on the majority principle. This system can be implemented relatively easily by hardware. The image quality reproduced by this system is quite acceptable and can be improved by high-density sampling. In this paper quantitative analysis is made based on the calculation of entropy and the ideal data compression rate when this signal processing system is used as a preprocessing. A considerable improvement of the data compression rate is shown. In addition, comparison between the proposed system and the existing conventional systems is made.

We proposed a novel four-domain structure for IPS/FFS mode LCD. It is based on a combination of formerly reported two kinds of two-domain structures. Through two-dimensional simulation study, we found that our novel design gives supersymmetric viewing-angle properties.

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The digital terrain maps become widespread, and Geographical Information Systems (GIS) have come into the limelight. One of the key technologies needed in GIS is data fusion reasoning. The function of data fusion is to consider various geographical data, such as "road" and "slope", and to make total evaluation. In this paper, we propose a data fusion reasoning technology using uncertain knowledge. Data fusion knowledge contains some uncertainty. For example, the knowledge for evaluating mobility costs is uncertain because it is qualitative, such as "we want to refuse the steep place.". We introduced two uncertainty reasoning mecha nisms to represent such data fusion process. One is fuzzy reasoning, and the other is Dempster-Shafer theory. We also offer knowledge editing facilities for describing data fusion knowledge, such as a data-flow diagram editor for designing data fusion process and a membership function editor for describing data abstraction methods. These knowledge editors facilitate the development and modification of data fusion knowledge base for GIS.