Global Patent Index - EP 1073932 A1

EP 1073932 A1 2001-02-07 - LIQUID CRYSTAL DISPLAY DEVICE WITH BIREFRINGENCE COMPENSATOR

Title (en)

LIQUID CRYSTAL DISPLAY DEVICE WITH BIREFRINGENCE COMPENSATOR

Title (de)

FLÜSSIGKRISTALL-ANZEIGEVORRICHTUNG MIT DOPPELBRECHENDEM OPTISCHEM KOMPENSATOR

Title (fr)

DISPOSITIF DE VISUALISATION A CRISTAL LIQUIDE A COMPENSATEUR DE BIREFRINGENCE

Publication

EP 1073932 A1 (FR)

Application

EP 99914601 A

Priority

  • FR 9900902 W
  • FR 9805181 A

Abstract (en)

[origin: FR2778000A1] The device utilizes a type II twisted nematic crystal screen (1). On the surface (10,11) of the screen is provided a drawn plastic film (2) exhibiting biaxial birefringence and refractive index anisotropy. A holographic grating (3) is placed slanted with respect to the screen, and exhibiting optical axis uniaxial birefringence. The assembly is placed between cross polarizers (4,4').

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

G02F 1/1335

IPC 8 full level (invention and additional information)

G02F 1/13363 (2006.01)

CPC (invention and additional information)

G02F 1/133632 (2013.01); G02F 1/133634 (2013.01)

Citation (search report)

See references of WO 9956169A1

Designated contracting state (EPC)

BE DE GB NL

EPO simple patent family

FR 2778000 A1 19991029; FR 2778000 B1 20011116; EP 1073932 A1 20010207; JP 2002513168 A 20020508; TW 457390 B 20011001; WO 9956169 A1 19991104

INPADOC legal status


2002-10-23 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020413

2001-11-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20011002

2001-10-04 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: THALES

2001-02-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001027

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE GB NL