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    • 9. 发明授权
    • Electroluminescent lamp
    • 电致发光灯
    • US06476552B1
    • 2002-11-05
    • US09548874
    • 2000-04-13
    • Koji Yoneda
    • Koji Yoneda
    • H01J162
    • H05B33/22H05B33/12
    • The difference of luminance between a front surface side and a rear surface side as viewed from the front surface side is reduced in a multi-layered EL lamp. An EL lamp includes a first laminate formed by serially laminating a first transparent electrode, a first luminescent layer and a first insulating layer, a second laminate formed by serially laminating a second transparent electrode, a second luminescent layer and a second insulating layer on the first laminate, and a rear electrode formed on the second laminate, wherein a dielectric constant between the first and second transparent electrodes is set to a value smaller than a dielectric constant between the second transparent electrode and the rear electrode. This can be achieved by limiting the amount of a high dielectric material to be mixed in the first insulating layer to not greater than 90% in terms of a weight ratio of a high dielectric material mixed in the second insulating layer, or by increasing the thickness of the first luminescent layer to 130 to 250% of the thickness of the second luminescent layer. After the adjustment is made in this way, the thickness of the first insulating layer may be set to not greater than 90% of the thickness of the second insulating layer or may be omitted.
    • 在多层EL灯中,从前表面侧观察的前表面侧和后表面侧之间的亮度差减小。 EL灯包括通过串联层叠第一透明电极,第一发光层和第一绝缘层而形成的第一层压体,通过在第一层上串联层叠第二透明电极,第二发光层和第二绝缘层而形成的第二层压体 层叠体和形成在第二层压体上的后电极,其中第一和第二透明电极之间的介电常数被设定为小于第二透明电极和后电极之间的介电常数的值。 这可以通过将混合在第一绝缘层中的高电介质材料的量限制为混合在第二绝缘层中的高介电材料的重量比不大于90%,或通过增加厚度 的第一发光层的厚度为第二发光层的厚度的130〜250%。 在以这种方式进行调整之后,第一绝缘层的厚度可以设定为不大于第二绝缘层的厚度的90%,或者可以省略。