专利汇可以提供Display device专利检索,专利查询,专利分析的服务。并且PURPOSE: To make the reaction of counter electrode perfectly reversible and make possible permanently lasting image displaying by using the opaque electrode of a sufficiently large surface area as a counter electrode in forming an electrochromic display device.
CONSTITUTION: In the electrochromic device formed by placing electrolyte 7 containing 4, 4'-dipyridinium compound between a transparent substrate 1 which is provided with a transparent thin-film electrode 2 as a display electrode and a counter electrode substrate 3 which is provided with a porous metal plate 5 through a current collecting metal 4 for counter electrode, nickel powder sintered body is used as the porous metal plate 5 which serves as the abovementioned counter electrode. As the porous metal plate 5, sponge form nickel body, surface-roughened nickel substrate or the like may be used as well. It is desirable that bivalent nickel ions of less than 0.5mol/l be contained in the abovementioned electrolyte.
COPYRIGHT: (C)1979,JPO&Japio,下面是Display device专利的具体信息内容。
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