公开(公告)号：EP1182909A2

公开(公告)日：2002-02-27

申请号：EP01202627.4

申请日：1993-05-06

Applicant: WESTAIM TECHNOLOGIES INC.

Inventor： Wu, Xingwei ,  Stiles, James Alexander Robert ,  Foo, Ken Yok ,  Bailey, Philips

IPC: H05B33/22 ,  H05B33/10 ,  H05B33/26 ,  H05B33/12

CPC classification number: H05B33/28 ,  H05B33/10 ,  H05B33/12 ,  H05B33/22 ,  H05B33/26 ,  Y10S117/904 ,  Y10S428/917 ,  Y10S438/94

Abstract: An electroluminescent laminate is provided that comprises:

a planar phosphor layer (22);
a front and a rear planar electrode (14,24) on either side of the phosphor layer;
a planar dielectric layer, which is preferably composed of a thick layer (18) and a thin layer (20), between the rear electrode and the phosphor layer, the dielectric layer being formed from sintered ceramic material such that the dielectric layer provides a dielectric strength S which is greater than about 1.0 X 106 V/m and a dielectric constant such that the ratio of the dielectric constant of the dielectric layer to that of the phosphor layer is greater than about 50:1, the dielectric layer having a thickness sufficient to prevent dielectric breakdown during operation as determined by the equation d2 = V/S, wherein d2 is the thickness of the dielectric layer and V is the maximum applied voltage, the dielectric layer forming a surface adjacent the phosphor layer which is sufficiently smooth that the phosphor layer illuminates generally uniformly at a given excitation voltage, and wherein the dielectric layer is either in contact with the phosphor layer or spaced apart from it by at least one additional layer that is itself in contact with the phosphor layer and wherein the layer that is in contact with the phosphor layer is compatible with the phosphor layer.

Abstract translation: 提供了一种电致发光叠层，其包括：平面荧光层（22）; 在所述荧光体层的任一侧上的前部和后部平面电极（14,24） 在后电极和磷光体层之间的平面介电层，其优选地由厚层（18）和薄层（20）组成，介电层由烧结陶瓷材料形成，使得介电层提供介电层 大于约1.0×10 6 V / m的强度S和介电常数使得介电层的介电常数与磷光体层的介电常数之比大于约50:1，所述介电层具有足够的厚度 为了防止在由等式d2 = V / S确定的操作期间的介质击穿，其中d2是介电层的厚度并且V是最大施加电压，介电层形成邻近磷光体层的表面，该表面足够光滑， 磷光体层在给定的激励电压下通常均匀地照射，并且其中介电层或者与荧光体层接触或者与荧光体层隔开1° 它自身与磷光体层接触，并且其中与磷光体层接触的层与磷光体层相容。