http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1051857-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ec0302f0e906bc6b19a4194d12264f89 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N9-31 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N9-31 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B21-56 |
| filingDate | 1998-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb7fb901f781b3f62f43f32173724edc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0949b68f53f4b670fe5dceeef6826eff |
| publicationDate | 2000-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1051857-A1 |
| titleOfInvention | Projection televisions with holographic screens having stacked elements |
| abstract | A projection screen (22) for a television has a three-dimensional hologram (26) on a film substrate (24). The screen (22) can have a plurality of stacked holograms and/or fresnel lenses having varying optical properties in vertical and horizontal directions, respectively. For example, vertical and horizontal holograms can have varying gain across a horizontal viewing span of ± 40° and a vertical viewing span of ± 20°. At least one projection tube (14, 18) is oriented along an optical path (34, 36) that converges at an angle α relative to a line or axis orthogonal with the screen. The hologram forms an interference pattern effective to minimize color shift that otherwise occurs in displayed images due to off axis projection. The screen (22) has a color shift less than or equal to approximately five for angles α between about 0° and 30°. |
| priorityDate | 1998-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.