| 摘要 |
PURPOSE: A reflective color display device is provided to reflect light of various wavelength bands by using a cholesteric liquid crystal. CONSTITUTION: First, second, and third cholesteric liquid crystals are mixed. The first, second and third cholesteric liquid crystals have first, second, and third threshold voltages. The first, second, and third cholesteric liquid crystals reflect a light of first, second, and third wavelength bands in a reflection state. The first, second, or third cholesteric liquid crystals is switched in a reflection state according to the variation of a voltage supplied to a reflective color display device. The first, second, or third wavelength bands is reflected.
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