| 摘要 |
A reflective liquid crystal display has a quarter wave plate and a film of fluorescent material located between a compartment containing a guest-host liquid crystal material and a reflector. In the dark state, light which has been reflected from the reflector excites the fluorescent layer. The light emitted by the fluorescent layer is absorbed by the guest-dye molecules in the liquid crystal and so does not exit from the compartment to the viewer. In the light state, light which has been reflected from the reflector excites the fluorescent layer. The light emitted by the fluorescent layer passes through the guest dye molecules in the liquid crystal display and exits from the guest dye molecules in the liquid crystal display and exits from the compartment to the viewer, thus enhancing the reflectivity of the display in the light state without degrading the dark state, thus enhancing the contrast ratio.
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