公开(公告)号：FR2298845A1

公开(公告)日：1976-08-20

申请号：FR7540377

申请日：1975-12-23

Applicant: IBM

Inventor： ROMANKIW LUBOMYR T ,  SLUSARCZUK MARKO M G ,  THOMPSON DAVID A

IPC: G11C11/08 ,  G02F1/09 ,  G02F1/167 ,  G09F9/37 ,  G11C19/02 ,  G11C19/08 ,  G09F13/24 ,  G09X ,  G11C11/14

Abstract: A magnetizable fluid which serves as a display liquid and which includes a suspension of colloidal magnetic particles is used in a display device. The magnetic fluid is opaque to provide optical contrast. A host liquid is substantially immiscible with the display liquid. The display liquid is carried in a reservoir section which is distributed about the periphery of a display field in the reservoir. Each propagation line of the display field is provided with a bubble generator, which passes bubbles by the input end of each line. A bubble switch coil draws selected bubbles across a gap to reach the associated propagation line in response to a signal impressed on the coil. A uniform rotating magnetic field is provided by a permanent magnet beneath the display or by orthogonal magnetic coils.