| 摘要 |
PURPOSE: A system having variable brightness characteristic be capable of controlling by electrically is provided to improve a available life and endurance. CONSTITUTION: The system comprises functional film(1, 21) provided electric conductibility layer(2, 3, 22, 23), the film including type of polarized light particle or type of liquid crystal concerned with color assort dyestuff and activity element typed suspension, and means for prevention/compensation resolution due to light-restoration, particularly resolution of particle polarized light or the color assort dyestuff.
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