| 摘要 |
1327472 Electro-optic display device XEROX CORP 18 Aug 1970 [20 Aug 1969] 39725/70 Heading G5C A display device comprises transparent support plate 11 having a transparent electriccally conductive coating 12 which acts as a full area electrode, and electro - optic imaging material such as "liquid crystals" which is contained between a spacing gasket 13 and coating 12. Three composite eletrodes have mutually insulated parts 29, 30 which are mounted on plates 11, and these electrodes are stacked to one side of the unit containing the imaging material. When electrical circuit 15 is completed one of electrode parts 29, 30 is at a different potential to electrode 12 and the electric field passes through the imaging material and thereby activates the latter to form an image corresponding to the shape of the electrode part 29 or 30. Initially, the imaging material may be opaque and the image produced is transparent, so that transmitted light from source 26 shines through the image. In one embodiment electrode parts 29, 30 and electrode 12 may be placed on both sides of the imaging material and when one of parts 29 or 30 is activated then the electrical circuit is completed by activating the electrode 12 which is on the opposite side of the imaging material. Electrode 12 may also not be required because parts 29, 30 on each of the composite electrodes can be operated at the same potential so that together they form a full-area electrode. In another embodiment contrast enhancing is achieved by placing a pair of polarizers on opposite sides of the display device, with their respective planes of polarization crossed. |
