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A highly corrosion resistant drawn cup type evaporator was developed. During the development of this evaporator, the corrosion characteristics of evaporators in the field were examined in detail. Profound understanding of the corrosion mechanism led to the development of a new, unique, corrosion test method which simulates the actual evaporator field service environment. The main factors involved in increasing the corrosion resistance of the brazing sheet are (1) reduction of iron and silicon content in the core alloy and, (2) addition of titanium to the core alloy. In the present alloy, titanium content varies lamellarly through the thickness of the core alloy. Regions of high titanium content have a more cathodic potential, thus causing corrosion to proceed along the low titanium content lamellae. Consequently, the reduced iron and silicon contents, and the titanium addition, have the net effect of reducing the pitting corrosion rate.

Stanley Electric Co., Ltd. has conducted research and development of a GH type LCD since 1975. In 1982, GH double-layered type large-area LCD dashboard developed by Stanley was adopted in a car as an industrialized color LCD for the first time in the world. As a result of this development, we were awarded “The 32nd Okochi Memorial Prize”. Since then, we have performed development of various types of GH LCDs in view of an electronic display suitable for the age of information. Today, we wish to report you the latest development status of such GH displays, particularly for dot matrix configuration. Also we wish to mention about the future perspective of the display utilizing LCD technology.