Global Patent Index - EP 1066619 A1

EP 1066619 A1 2001-01-10 - BACKLIGHT CONTROL FOR A DISPLAY DEVICE

Title (en)

BACKLIGHT CONTROL FOR A DISPLAY DEVICE

Title (de)

RÜCKBELEUCHTUNG FÜR EIN ANZEIGEGERÄT

Title (fr)

COMMANDE DE RETROECLAIRAGE POUR DISPOSITIF D'AFFICHAGE

Publication

EP 1066619 A1 (EN)

Application

EP 99913442 A

Priority

  • GB 9900934 W
  • GB 9806593 A

Abstract (en)

[origin: GB2335776A] A display comprises a matrix of pixels 11 arranged in rows and columns, each pixel 10 being selectively controllable in terms of its light transmissive condition, and an illumination system, comprising an array 13 of elongate elements which provide light in response to electrical impulses, the elements 4, 5, 6 being arranged side by side to face the matrix. Adjacent elements provide light having a different one of a plurality of colours. The matrix is addressed using a row by row addressing sequence. During part of this sequence, a row of pixels is illuminated with light of a first colour from a first element, whilst a remote row of pixels is illuminated with light of a different colour from a further element. This enables more efficient illumination of the matrix than with conventional colour sequential displays in which all rows are simultaneously illuminated with the same colour.

IPC 1-7 (main, further and additional classification)

G09G 3/34

IPC 8 full level (invention and additional information)

G02F 1/137 (2006.01); G02F 1/1334 (2006.01); G09G 3/20 (2006.01); G09G 3/34 (2006.01); G09G 3/36 (2006.01); G02F 1/13357 (2006.01)

CPC (invention and additional information)

G09G 3/342 (2013.01); G09G 3/3607 (2013.01); G02F 2001/133622 (2013.01); G09G 3/2022 (2013.01); G09G 3/3629 (2013.01); G09G 2310/0235 (2013.01); G09G 2310/024 (2013.01); G09G 2310/061 (2013.01)

Citation (search report)

See references of WO 9950817A1

Designated contracting state (EPC)

BE CH DE FI FR GB LI NL SE

EPO simple patent family

GB 2335776 A 19990929; GB 9806593 D0 19980527; EP 1066619 A1 20010110; JP 2002510073 A 20020402; TW 452752 B 20010901; WO 9950817 A1 19991007

INPADOC legal status


2002-07-17 [18W] WITHDRAWN

- Date of withdrawal: 20020521

2001-01-10 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001023

2001-01-10 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE CH DE FI FR GB LI NL SE