Fail transparent electro-luminescent display with backup
作者： Michael A. Biferno
DOI:
关键词:
摘要: This display system comprises, front to rear, an electro-luminescent information bearing element which is substantially transparent when not energized, a background dark (opaque) it energized and backup means visible the two elements are energized.
lens.org 参考文章(3)
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Rainar Wiebalck, Model aircraft with altitude change indicating means ,(1978)