Global patent index - EP 0981911 A1

EP 0981911 A1 2000-03-01 - DISPLAY SYSTEM

Title (en)

DISPLAY SYSTEM

Title (de)

ANZEIGEVORRICHTUNG

Title (fr)

SYSTEME D'AFFICHAGE

Publication

EP 0981911 A1 (EN)

Application

EP 98921619 A

Priority

  • GB 9801396 W
  • GB 9709926 A

Abstract (en)

[origin: WO9852359A1] The PLLCD (photoluminescent LCD) principle is applied to a projection display. A source (11) of largely monochromatic, near-visible UV light directs excitation light through a liquid-crystal (or acousto-optic) modulator (15). The photo-luminescent materials (31) that emit visible light when struck by the excitation light are mounted on a screen (3) and the modulated excitation light is projected onto this screen by a projector (17) in order to form a visible image. The image is controlled by a feedback mechanism involving reflective spots (33) on the screen, a video camera (121) and a controller (23). Alternatively a scanning technique can be used. Since only monochromatic light is required for the projection the system can be considerably simpler than RGB projection displays.

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

H04N 9/31; G02F 1/1335

IPC 8 full level (invention and additional information)

H04N 9/31 (2006.01)

CPC (invention and additional information)

H04N 9/3129 (2013.01); G02F 1/133617 (2013.01); H04N 9/3194 (2013.01); G02F 2202/14 (2013.01); G02F 2203/34 (2013.01)

Citation (search report)

See references of WO 9852359A1

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

WO 9852359 A1 19981119; AU 7440698 A 19981208; EP 0981911 A1 20000301; GB 9709926 D0 19970709

INPADOC legal status

2001-03-28 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20001011

2000-07-12 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20000531

2000-03-01 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991206

2000-03-01 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB NL