Patent ID: 7333259
Filing Date: 2008-02-19
Classification: G02F

Abstract:
1. A multicolor display element, comprising: a display electrode, a counter electrode, an electrolyte, and a display layer, wherein the counter electrode is disposed oppositely to the display electrode, the electrolyte is filled into a space provided between the display electrode and the counter electrode, the display layer is disposed on a surface, which faces the counter electrode, of the display electrode, the display layer contains plural electrochromic compositions in a condition that the plural electrochromic compositions are separated into plural layers within the display layer or are mixed together within the display layer, the plural electrochromic compositions are formed of plural species of conductive or semiconductive fine particles, of which conductive properties are different from each other, that bear plural organic electrochromic compounds each capable of coloring differently, and at least one of threshold voltage for coloring condition, threshold voltage for decoloring condition, charge amount required for coloring into a sufficient color density, and charge amount required for sufficiently decoloring, are substantially different from each other between the plural electrochromic compositions.