| 摘要 |
Liquid crystal display apparatus is disclosed wherein a liquid crystal mixture (7) having incorporated therein a) a positive order parameter dye and a negative order parameter dye, or b) a zero order parameter dye and a positive order parameter dye, or c) a zero order parameter dye and a negative order parameter dye, is interposed between transparent electrodes (4) secured to a transparent superstrate (2) and a transparent substrate (3). An operating voltage wave ranging between 0 volts and an operating voltage which may be as high as 15.6 volts, and of variable frequency, is applied across the transparent electrodes (4) to produce color changes of adjustable frequency in the liquid crystal mixture (7). Simultaneously, a square voltage wave of 35 Hz is applied across the transparent electrodes (4) to prevent degradation of the liquid crystal mixture (7). Various modifications are shown which produce a travelling wave of color changes of adjustable frequency across the liquid crystal display.
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