| 摘要 |
An optical switching device includes two parallel substrates having at least a pair of electrodes on mutually opposing inner surfaces thereof or on one of the inner surfaces. A liquid crystalline material layer is sealed between the substrates. The liquid crystalline material layer contains an insoluble light-control medium having an outer diameter smaller than the thickness of the liquid crystalline material layer. When an electric field is applied between the electrodes, the light-control medium moves to form a region in which the light-control medium is densely dispersed and a region in which the light-control medium is sparsely dispersed, thereby producing a transmittance difference to effect light control. Because the loss of light transmitting through the optical switching device is extremely small, high-contrast and extremely bright display can be obtained without using a polarizing plate.
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