| 摘要 |
An image-display panel includes a plurality of light-displaying elements, such as electroluminescent capacitors or liquid crystals, disposed in an array of rows and columns. Associated with each light-displaying element is a photoconductor or other light-responsive device for activating the light-displaying elements. A pair of crossed arrays of fiber-optic light pipes have their crossings in juxtaposition with the photosensitive devices, the light pipes including localized light-emitting apertures near the crossings. A system is included for injecting light into the light pipes in a manner to provide systematic sequential scanning of the photosensitive devices by concurrent light emission from the localized apertures of selected light-conductive elements of both of the arrays. Light emitted from a single light-pipe aperture reduces the resistance of part of the associated photoconductor, but the resistance of the remaining part is sufficient to prevent the light-displaying element from functioning. When light is emitted from both light-pipe apertures associated with the photoconductor at a single display element, the photoconductor resistance is sufficiently reduced that the light-displaying element produces a useful output. In an alternative embodiment, the light pipes are utilized for scanning activation in but one direction, while electrical conductors are used to perform the coordinate scanning function.
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