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We have developed an automotive information display which provides high resolution and high display quality by using a newly developed film compensation STN LCD (FST). The key issue of this FST development is optimization of compensation film, LC mixture, color filter and cell design for automotive application. Further, in order to realize bright and highly visible display, compensation conditions of FST is carefully examined, and a newly developed Warm Cathode Fluorescnet Lamp (WFL) is adopted for a backlight. WFL has advantages of both Cold Cathode Fluorescent Lamp and Hot Cathode Fluorescent Lamp, and provides a high light intensity with dimming capability. Such new technologies of FST and WFL are combined with peripheral technologies which integrate those key components into a total display system. Prototyped display based on these technologies and its results are reported in this paper.

Incandescent bulbs have been mostly used in the field of conventional light source for display and automotive lamp. However, recent increasing requirements for compact structure, color display, high display quality and improvement of total car design by means of color coordination, can only he satisfied with more natural color light sources. These requirements have led us to develop miniature halogen bulb without exhaust tube which was common in conventional halogen bulb. This new bulb gives compactness in its structure, high efficiency whiter light, and good luminous flux retaining characteristics. In this paper, we report the details of the developed bulb and its applications.