EP1542071A3
Rear projection image display device
Abstract
A rear-projection image display device comprising a light source, a display element for visual images, a projection lens and a screen for viewing visual images projected on the screen from the rear, wherein the ratio d/a between the diameter d of the exit pupil of the projection lens and the projection distance a is 0.06 or less, said screen whereon visual images are displayed includes at least two diffusion elements (1,2,5,6), and light-diffusing fine particles are dispersed in one of the two diffusion elements (6) which is closest to the viewer.

Term
Term ended
Projected expiry passed 15 March 2016, 10.5 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
13 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Sheet 12 Sheet 13
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0381417A1 | Cites | European Patent Office (EPO) | Y | Search report | 8 |
| EP0484073A2 | Cites | European Patent Office (EPO) | A | Search report | 1-8 |
| US4309073A | Cites | United States of America | A | Search report | 6,7 |
| US4566756A | Cites | United States of America | Y | Search report | 8 |
| US4752116A | Cites | United States of America | A | Search report | 1-8 |
| US5066099A | Cites | United States of America | XY | Search report | 1,2 |
| US5146342A | Cites | United States of America | A | Search report | 1-8 |
| JPH0313931A | Cites | Japan | Y | Search report | 3-7 |
| JPS58186732A | Cites | Japan | Y | Search report | 3-7 |
| JPS59127031A | Cites | Japan | A | Search report | 6,7 |
| JPS59135450A | Cites | Japan | Y | Search report | 8 |
8 members in 4 offices
Priority claims7
| Document | Office | Kind | Date |
|---|---|---|---|
| 5638195 | Japan | A | |
| 5638195 | Japan | – | |
| 96104139 | European Patent Office (EPO) | A | |
| 5638195 | – | – | – |
| 96104139 | – | – | – |
| EP19960104139 | – | – | – |
| JP19950056381 | – | – | – |
Members8
| Document | Office | Kind | |
|---|---|---|---|
| EP0732615A1 | European Patent Office (EPO) | A1 | |
| JPH08313865A | Japan | A | |
| US5675435A | United States of America | A | |
| EP0732615B1 | European Patent Office (EPO) | B1 | |
| EP1542071A2 | European Patent Office (EPO) | A2 | |
| DE69634793D1 | Germany | D1 | |
| DE69634793T2 | Germany | T2 | |
| EP1542071A3This record | European Patent Office (EPO) | A3 |
13 legal events, as 2 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Designated country de not longer valid8566 | 8566 | DE | |
| Application deemed to be withdrawnWithdrawn18D | 18D | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWNSTAA | STAA | EP | |
| Designation fees paidAKX | AKX | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Observations by third partiesORIGINAL CODE: EPIDOSNTIPATPAC | TPAC | EP | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| Divisional application: reference to earlier applicationAC | AC | EP | |
| Designated contracting statesAK | AK | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 1542071
- Publication, DOCDB
- 1542071
- Publication, EPODOC
- EP1542071
- Application
- 5003675
- Application, DOCDB
- 05003675
- Application, EPODOC
- EP20050003675
Titles3
- German
- Bildanzeigegerät mit Rückprojektion
- English
- Rear projection image display device
- French
- Dispositif d'affichage d'images à projection par l'arrière
Classification
- CPC, 2
- G03B21/62
- G03B21/625
- IPC, 1
- G03B21 62
Designated states4
- Contracting states, 4
- Germany
- France
- United Kingdom
- Netherlands (Kingdom of the)