| 摘要 |
An image display device features a generally thin envelope having a transparent viewing wall. A luminescent screen is disposed on the inner side of the viewing wall. Spaced within the envelope from the screen is a sheet of piezoelectric material which propagates acoustic wave s repetitively launched therein. Distributed over the piezoelectric sheet are an array of electron sources. These may be either sources for generating electrons from the vicinity of the surface of the sheet or a plurality of apertures in the sheet and through which a flow of electrons is controlled. In any case, the release of electrons toward the screen is in response to electric fields developed by the acoustic waves. An electron accelerating field is created between the sources and the screen, and the apparatus further includes an arrangement for modulating the intensity of the released electron stream in response to a video signal.
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