| 摘要 |
Transmission and reflection color liquid crystal display devices exhibiting color by additive color mixing, having a noncomplex structure, drivable on low voltage, displaying a high-contrast image, having a high-speed response, and capable of having a large area screen. A chiral nematic liquid crystal containing a chiral dopant is mixed with 0.001 to 20 weight % of dichroic black dye. The mixture is further mixed with a prepolymer to form a transparent polymer solid body after polymerization. This mixture is interposed between two conductive substrates at least one of which is transparent. The assembly is irradiated with ultraviolet radiation or light with a short wavelength near the wavelength of ultraviolet radiation. In the dimming layer between both conductive substrates, an aggregation of vesicular liquid crystals encysted with thin film of the transparent polymer solid material. When no voltage is applied, the dye molecules are distributed in the space, with the major axis being oriented randomly. Therefore the dye molecules absorb light. If a voltage is applied, long liquid crystal molecules are aligned vertically to the substrates, so that the dye molecules are also aligned. As a result, the black of the dye molecules are not exhibited, allowing light to be transmitted.
|
