公开(公告)号：BE758546A

公开(公告)日：1971-04-16

申请号：BE758546D

申请日：1970-11-05

Applicant: RCA CORP

Inventor： NESTER E O ,  MARLOWE F J

IPC: G02F1/133 ,  G02F1/1365 ,  G02F1/1368 ,  G09G3/18 ,  G09G3/36 ,  H04N3/12 ,  H04N3/14 ,  H04N5/66 ,  G09F

Abstract: A unidirectional electric field is applied to selected liquid crystal elements of a display matrix during one display frame. The direction of application of the field is reversed during the next display frame. The above may be achieved, for example, by connecting a capacitor across the liquid crystal element, charging it in one sense during one frame then opening the charging circuit, and charging it in the opposite sense during the next frame and then opening the charging circuit.