Electrooptical device
    9.
    发明公开
    Electrooptical device 失效
    电光装置。

    公开(公告)号:EP0123181A2

    公开(公告)日:1984-10-31

    申请号:EP84103810.2

    申请日:1984-04-06

    申请人: HITACHI, LTD.

    IPC分类号: G02F1/137

    CPC分类号: G02F1/13306 G02F1/141

    摘要: An optical apparatus comprises an optical device (10) having an optically functional material (6) sandwiched between a pair of substrates (3) with electrodes (5) formed on opposing surfaces. The optically functional material has such a characteristic that intensity of light issuing from the optical device changes asymmetrically in response to inversion of the polarity of an applied external field. Pulse voltages of one polarity for determining the intensity of the issuing light and pulse voltages of an opposite polarity are applied from a source (8) at a predetermined period (T) so that an average voltage is zeroed within the predetermined period. The issuing light intensity under the application of the pulse voltages of one polarity and the issuing light intensity under the application of the other pulse voltages are selected or changed by a switching unit (20).