Global Patent Index - EP 1051855 A1

EP 1051855 A1 2000-11-15 - PROJECTION TELEVISIONS WITH HOLOGRAPHIC SCREENS FOR HIGH OFF AXIS EXCLUSION

Title (en)

PROJECTION TELEVISIONS WITH HOLOGRAPHIC SCREENS FOR HIGH OFF AXIS EXCLUSION

Title (de)

PROJEKTIONSFERNSEHGERÄTE MIT HOLOGRAPHISCHEN BILDSCHIRMEN FÜR HOHE AUSSERAXIALE UNTERDRÜCKUNG

Title (fr)

TELEVISEURS A PROJECTION A ECRANS HOLOGRAPHIQUES POUR EXCLUSION HORS-AXE ELEVEE

Publication

EP 1051855 A1 (EN)

Application

EP 98903795 A

Priority

US 9801627 W

Abstract (en)

[origin: WO9939511A1] A projection television (10) has image projectors (14, 16, 18) and optics for projecting images of different colors, producing a quantity of scattered light that is incident upon at least a portion of a projection screen (22). The projection screen (22) includes a three-dimensional hologram (26) disposed on a substrate (24) and representing a three-dimensional interference array that receives images from the projectors (14, 16, 18) on a first side and displays the images on a second side with controlled light dispersion of all the displayed images. The screen (22) is specifically configured to exclude a high proportion of light that is incident from angles other than normal to the screen (22), substantially eliminating the effects of the scattered light and improving image contrast.

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

H04N 9/31; G02B 5/32; G03B 21/62

IPC 8 full level (invention and additional information)

G02B 5/32 (2006.01); G03B 21/56 (2006.01); G03B 21/62 (2006.01); H04N 9/31 (2006.01)

CPC (invention and additional information)

G03B 21/567 (2013.01); G02B 5/32 (2013.01); G03B 21/62 (2013.01); H04N 9/31 (2013.01)

Citation (search report)

See references of WO 9939511A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9939511 A1 19990805; AU 6047198 A 19990816; CN 1284235 A 20010214; EP 1051855 A1 20001115; JP 2002502197 A 20020122

INPADOC legal status


2002-10-30 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020423

2001-03-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010130

2000-11-15 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000728

2000-11-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT