Global Patent Index - EP 1028347 A1

EP 1028347 A1 2000-08-16 - LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME

Title (en)

LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME

Title (de)

FLÜSSIGKRISTALLANZEIGE UND VERFAHREN ZU DEREN ANSTEUERUNG

Title (fr)

ECRAN A CRISTAUX LIQUIDES ET PROCEDE DE PILOTAGE DUDIT ECRAN

Publication

EP 1028347 A1 (EN)

Application

EP 98940621 A

Priority

JP 9803859 W

Abstract (en)

In a liquid crystal display comprising an antiferroelectric liquid crystal or a ferroelectric liquid crystal and a light source capable for successively emitting light of different colors, the light source has an arbitrary period during which the light source stops emission when switching from one color to another, and a reset period during which the antiferroelectric liquid crystal or ferroelectric liquid crystal in all pixels is reset to a predetermined state is included within the arbitrary period. The reset period may instead be included in the early part or the last part of a period during which the light source emits light. <IMAGE>

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

G02F 1/133; G09G 3/34; G09G 3/36

IPC 8 full level (invention and additional information)

G09G 3/34 (2006.01); G09G 3/36 (2006.01)

CPC (invention and additional information)

G09G 3/3629 (2013.01); G09G 3/3406 (2013.01); G09G 3/3633 (2013.01); G09G 2310/0235 (2013.01); G09G 2310/06 (2013.01); G09G 2310/061 (2013.01); G09G 2310/063 (2013.01); G09G 2310/065 (2013.01); G09G 2320/0247 (2013.01)

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

EP 1028347 A1 20000816; EP 1028347 A4 20050831; WO 0013057 A1 20000309

INPADOC legal status


2006-05-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060119

2005-08-31 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20050715

2005-08-31 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 02F 1/133 A

2005-08-31 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 09G 3/36 B

2005-08-31 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 09G 3/34 B

2001-11-21 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: CITIZEN WATCH CO. LTD.

2000-08-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991208

2000-08-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB NL