| 摘要 |
There are provided an optical switching element (4) which can avoid a disconnection trouble, which can efficiently achieve an impedance change between electrodes (5,14) with irradiation of optical signal, and which can improve the aperture rate of display, and a high-quality optical scanning display using such optical switching elements. An optical switching element is so arranged that a source electrode (14) and a drain electrode (5) are connected to a photoconductor (4) which changes an impedance thereof with irradiation of light and that the source electrode (14) and drain (5) electrode are provided on a surface of the photoconductor (4) irradiated by the light and are formed of a transparent material. Further, an optical scanning display is so arranged that an electrooptical medium is confined between two substrates (1a,2a) each having an electrode (5,9), that one of the substrates (1a) is provided with a plurality of optical waveguides (Y1...Yn), a plurality of signal electrodes (X1...Xm), and a plurality of optical switching elements (4) made of a photoconductive material, that the electrooptical medium is driven by an optical signal, and that each of the optical switching elements (4) is the same as described above. <IMAGE> |
