公开(公告)号：CA1054738A

公开(公告)日：1979-05-15

申请号：CA262063

申请日：1976-09-27

Applicant: IBM

Inventor： HALLETT M ,  BARCLAY D ,  MINSHULL J ,  BIRD C ,  KIRKMAN D ,  OWEN C

IPC: G04G9/00 ,  C25D11/00 ,  G02F1/163 ,  G09F9/30 ,  G09G3/16 ,  G09G3/19 ,  G09G3/38 ,  G06K15/18 ,  G09F9/00

Abstract: In addition to the usual two electrodes of an electro-chromic cell at which balanced reactions take place, at least one further electrode is provided. Operation of the display is preceded by applying potential to the two electrodes so that one of them carries a coloured precipitate. Then, a relatively small potential across the a coloured electrode and a selected further electrode transfers the colour to the further electrode. Ohmic connection between the coloured electrode and the further electrode does not cause the colour to dissipate. One application is to a 7 - element digit display and a matrix display comprises columns of electrodes each headed by said two electrodes (called dump and transfer electrodes respectively) and including a plurality of further electrodes. Means for addressing and sensing such a display are described.