Patent ID: 6207292
Filing Date: 2001-03-27
Classification: C09K,G02F,Y10T

Abstract:
An electrochromic display device comprising at least two transparent substrates which are joined to one another via a spacer ring and of which at least one has an electrically conductive, transparent coating on the side facing the other and one of the substrates may be mirrored, wherein at least one of the substrates having a conductive coating is subdivided into segments which are electrically separated from one another and can be contacted singly, and there is contained, between the substrates,a) a solvent,b) dissolved in this solvent at least one oxidizable substance RED.sub.1 which, by releasing electrons at an anode, is converted into its respective form OX.sub.1 with a change in absorbance in the visible region of the spectrum, and at least one reducible substance OX.sub.2 which by accepting electrons at a cathode, is converted into its respective form RED.sub.2 with a change in absorbance in the visible region of the spectrum, the original forms RED.sub.1 and OX.sub.2 each being recovered after charge equalization,c) optionally a conductive salt.