EP 1051855 A1 20001115 - 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
Application
Priority
US 9801627 W 19980129
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
IPC 8 full level
G02B 5/32 (2006.01); G03B 21/56 (2006.01); G03B 21/62 (2006.01); H04N 9/31 (2006.01)
CPC (source: EP KR)
G02B 5/32 (2013.01 - EP); G03B 21/567 (2013.01 - EP); G03B 21/62 (2013.01 - EP); H04N 9/31 (2013.01 - EP KR)
Citation (search report)
See references of WO 9939511A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9939511 A1 19990805; AU 6047198 A 19990816; CN 1284235 A 20010214; EP 1051855 A1 20001115; JP 2002502197 A 20020122; KR 20010040479 A 20010515
DOCDB simple family (application)
US 9801627 W 19980129; AU 6047198 A 19980129; CN 98813391 A 19980129; EP 98903795 A 19980129; JP 2000529843 A 19980129; KR 20007008335 A 20000729