公开(公告)号：JPH03242626A

公开(公告)日：1991-10-29

申请号：JP33085790

申请日：1990-11-30

Applicant: IBM

Inventor： SUTEIIBUN RESURII BUTSUKUUOORU ,  MAATEIN JIYOZEFU GOORUDOBAAGU ,  REBATEI IIIENGAA ,  DANIERU PIITAA MORISU ,  TERENSU ROBAATO OTOUURU ,  ARUFURETSUDO BIIBETSUKU

IPC: G02F1/15 ,  C09K9/00 ,  C09K9/02 ,  G09F9/30 ,  G09G3/38 ,  H01B1/12

Abstract: PURPOSE: To obtain a display which changes in colors in a wide range and is bright with small consumption of electric power without any limit of the observation angle by using an electrochemical color-changing cell having a specified inner-molecule charge transfer salt as a color-changing agent for a display panel. CONSTITUTION: This electrochemical color-changing cell consists of a cell 2 at least a part of which is transparent and is filled with a color-changing agent 4 comprising an inner-molecule charge transfer salt of a soln. in a liquid, gel or solid phase. The cell has an indicating electrode 6 and a counter electrode 8 which face each other with a separation zone 12 between these and are connected to a variable DC power supply 10. The material 4 consists of a covalent compd. having at least one radical cationic part which makes a covalent bond with at least one radical anionic part or a material containing carbonyl groups which make conjugates with violene or cyanine part or aromatic part. In the obtd. color-changing cell, changes in colors in a wide range can be obtd. by changing the voltage applied on electrodes 6, 8.