| 摘要 |
PURPOSE:To obtain a reflective liquid crystal display element having high contrast, by setting the thickness of a lower substrate at <=0.3mm. with the reflective index set larger than that of the liquid crystal. CONSTITUTION:For instance, a transparent plate having <=0.3mm. thickness (t) and made of polyethylene terephthalate (reflective index 1.65), polylead dimethacrylate (reflective index 1.645), etc. is used for a lower substrate 4b. A reflective plate 2 is provided to the lower surface of the substrate 4b; while a transparent electrode 7 is set on the upper surface of the substrate 4b. A polyimide film 8 is provided on the electrode 7 to give a rubbing process. An oriented film is formed on an upper substrate 4a by the electrode 7 and the film 8. A liquid crystal layer 5 containing a dichromatic matter 9 is enclosed between the substrate 4a and 4b. The refractive index of the layer 5 is set smaller than that of the substrate 4b. As a result, the shift is reduced between the position where an oblique incident light 3 goes into the substrate 4b from the layer 5 and the position where the light 3 is reflected by the plate 2 and goes into the layer 5 again. Thus a reflective liquid crystal display element is obtained with high contrast. |
