公开(公告)号：FR2749431B1

公开(公告)日：1998-08-14

申请号：FR9606945

申请日：1996-05-31

Applicant: PIXTECH SA

Inventor： BANCAL BERNARD ,  DARBOIS FRANCOIS ,  PEYRE JEAN FRANCOIS

IPC: G09G3/20 ,  G09G3/22 ,  G09G5/10 ,  G09G1/26

公开(公告)号：FR2749431A1

公开(公告)日：1997-12-05

申请号：FR9606945

申请日：1996-05-31

Applicant: PIXTECH SA

Inventor： BANCAL BERNARD ,  DARBOIS FRANCOIS ,  PEYRE JEAN FRANCOIS

IPC: G09G3/20 ,  G09G3/22 ,  G09G5/10 ,  G09G1/26

Abstract: The brightness control is achieved by modifying the width of an addressing signal (Hsync) applied to the rows of a first group of pixels. The rows of a second group of pixels are addressed by amplitude modulation, at the row scan frequency, of a polarisation potential (Ki) as a function of the brightness required at a pixel. The addressing signal is timed to correspond to the synchronisation signal. The width of the synchronisation pulse is controlled by counting clock pulses delivered at a frequency much higher than that of the synchronisation signal. The clock signal corresponds to the clock converting incoming brightness values arriving serially to a parallel form.