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    • 74. 发明专利
      DE1489113B2  未知
    • DE1489113B2
    • 1973-12-20
    • DE1489113
    • 1964-05-22
    • MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD., KADOMA, OSAKA (JAPAN)
    • KOHASHI, TADAO, YOKOHAMA (JAPAN)
    • H01L31/14 , H05B33/12 , H05B33/22 , H05B33/26 , H01L17/00
    • An image converter having a photo-conductive and an electroluminescent layer between suitable electrodes also has a luminescent layer such that incident radiation excites the luminescent layer, the radiations from which have a wavelength in the region of maximum sensitivity of the photo-conductive material. The device may comprise a base-plate 1, e.g. glass, a conductive layer 2, e.g. tin oxide, an electroluminescent layer 3, e.g. zinc oxide activated by copper or manganese, a reflective layer 13 of e.g. titanium oxide or barium titanate which also serves to prevent electrical breakdown, an opaque layer 4 of e.g. carbon in a plastic organic binder, 1-10m thick, to prevent optical feed-back, a photo-conductive layer 5 e.g. of cadmium sulphide activated by copper or chlorine in a binder, 5-100 m thick, a grid electrode 6, e.g. of gold-plated tungsten wires 10-30 m diameter, 50-100 m mesh, or 10-150 m diameter, 250-700 m mesh, a luminescent layer 101, e.g. of zinc manganese fluoride for cathode luminescence, or of silver activated zinc cadmium sulphide in a glass, epoxy or nitro-cellulose binder, 20-200 m thick, a transparent impedance layer 103, e.g. a plastic or glass film, and an electrode layer 7, e.g. vapour deposited aluminium or silver paint. Since the luminescent layer 101 should be thin, to avoid self-absorption, a transparent dielectric layer may be included between the layers 101 and the photo-conductive layer 5. Variations of the magnitudes and phases of the voltages V1 and V2 enable a positive, a negative, or an intermediate (U-shaped) response characteristic to be obtained.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 78. 发明专利
      DE1614177B2  未知
    • DE1614177B2
    • 1973-06-07
    • DE1614177
    • 1967-08-14
    • H01L31/14 , H01L17/00
    • 1,201,242. Electroluminescence. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 7 Aug., 1967 [15 Aug., 1966; 27 Oct., 1966 (3)], No. 36218/67. Heading C4S. An infra-red to visible image converter comprises an electroluminescent layer, an infra-redquenchable photoconductive layer (e.g. CdS), electrodes, an A.C. source, a visible bias light source to induce a bias photo-current and means for projecting a visible light on to the photoconductive layer to induce a photo-current greater than the bias photo-current to erase the after-image of the incident infra-red image. The bias light may be provided by a second electroluminescent layer, an external light source or may be omitted, in which case the decaying photo-current of the after-image eliminating light may serve as bias photo-current (e.g. Fig. 6, not shown). A light (23) of variable intensity may serve alternately as bias light and afterimage eliminating light source (Fig. 2, not shown) or rotating slotted discs, or a stroboscope may be used to periodically radiate the device with the after-image eliminating light, to obtain moving displays for instance (Fig. 3, not shown). The infra-red radiation may be interrupted at intervals or may be continuously incident. Also, to reduce flicker, the A.C. supply to the device may be periodically terminated during after-image elimination by mechanical switching (Fig. 4, not shown) or by a photo-cell-relay mechanism in combination with a rotating slotted disc, for example (Fig. 5, not shown). Alternate interruption of the radiation from continuous infrared and after-image eliminating light sources may be achieved by pairs of discs slotted in opposite senses (Fig. 7, not shown).
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 79. 发明专利
      DE1789143A1  未知
    • DE1789143A1
    • 1973-04-19
    • DE1789143
    • 1968-09-09
    • MATSUSHITA ELECTRIC IND CO LTD
    • KOHASHI TADAO
    • H05B33/00 , H01L17/00
    • A solid-state electroluminescent image display device which produces the output thereof in response to an image of the light, X-ray or other types of energy projected on to said device, said output being able to be controlled by varying a DC bias voltage for said device, and which comprises an electroluminescent layer excited by an AC electric field and controllable by a DC field and an energy-responsive layer whose resistivity varies in response to the incident energy such as a photoconductive layer, said two layers being interposed between a first light-pervious electrode and a second electrode in such a manner that the electroduminescent layer is adjacent to said first electrode, a third or composite electrode placed between said two layers, the AC exciting voltage being connected between said first and third electrodes and the DC bias voltage between said second and third electrodes.
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