| 摘要 |
An aspect of the invention provides a method of recording an image ( 28 ) comprising: providing a display cell ( 4 ) having a first cell wall ( 6 ) and a second cell wall ( 8 ) opposed to the first cell wall, the cell walls enclosing a layer of a display medium ( 10 ) comprising a liquid crystal material ( 12 ) having finely-divided pigment particles ( 14 ) dispersed therein, each cell wall ( 6,8 ) including an electrode ( 16,18 ) for applying an electric field across the display medium ( 10 ); applying via the electrodes ( 16,18 ) a first electric field of a first polarity and of sufficient magnitude and duration to cause the particles ( 14 ) to migrate and accumulate at the first cell wall ( 6 ); illuminating at least some of the particles ( 14 ) with an image to be recorded; and applying via the electrodes ( 16,18 ) a second electric field of opposite polarity to the first polarity and of sufficient magnitude and duration to cause some but not all particles ( 14 ) to migrate from the first cell wall ( 6 ) so as to produce a recorded image ( 28 ). Other aspects of the invention include a display device ( 2 ) for use with the method, and a display cell ( 4 ) having a recorded image ( 28 ).
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