| 摘要 |
PCT No. PCT/GB85/00132 Sec. 371 Date Dec. 4, 1985 Sec. 102(e) Date Dec. 4, 1985 PCT Filed Apr. 1, 1985 PCT Pub. No. WO85/04740 PCT Pub. Date Oct. 24, 1985.A cathode ray tube provided on the exterior of its screen with a layer of polymeric piezoelectric material, for example polyvinylidene fluoride. Localized changes in physical stress on the layer, such as by way of localized pressure of heating on the layer, create a charge region which produces alteration of a beam current of an electron beam when the beam scans over the region. This alteration is detected, as by a sensing loop, to produce a data input.
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