Projection optical system and projector apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 1, 2020
Grant Date -
Dec 21, 2017
app pub date -
Sep 5, 2017
filing date -
Dec 28, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A projection optical system (2) projects from a DMD (7) on a reducing side onto a screen (9) on an enlargement side, and includes: a first refractive optical system (10) that forms a first intermediate image (51) on the enlargement side using light incident from the reducing side; a second refractive optical system (20) that forms the first intermediate image (51) on the reducing side into a second intermediate image (52) on the enlargement side; and a first reflective optical system (30) including a first reflective surface (31a) with positive refractive power that is positioned on the enlargement side of the second intermediate image (52), wherein the second refractive optical system (20) includes a first focus lens group (61) that moves when focusing is carried out, and the first focus lens group (61) includes at least one lens (L13) included in the second refractive optical system (20).
First Claim
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Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
---|---|---|---|---|---|
US | B2 | US9785043 | Dec 26, 2013 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
GRANTED PATENT AS SECOND PUBLICATION | Projection optical system and projector apparatus | Oct 10, 2017 | |||
WO | A1 | WO2014103324 | Dec 26, 2013 | Patent | Application |
Type : Patent Sub-Type : Application | |||||
INTERNATIONAL APPLICATION PUBLISHED WITH INTERNATIONAL SEARCH REPORT | 投射光学系およびプロジェクタ装置 | Jul 03, 2014 | |||
JP | B2 | JP6243353 | Dec 26, 2013 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系およびプロジェクタ装置 | Dec 06, 2017 | |||
EP | B1 | EP2835677 | Dec 26, 2013 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
Patent | PROJECTION OPTICAL SYSTEM AND PROJECTOR DEVICE | May 27, 2020 | |||
JP | B2 | JP6517295 | Sep 26, 2017 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | May 22, 2019 | |||
JP | B2 | JP6517294 | Sep 26, 2017 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | May 22, 2019 | |||
JP | B2 | JP6530795 | Sep 26, 2017 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | Jun 12, 2019 | |||
JP | B2 | JP6448735 | Sep 26, 2017 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | Jan 09, 2019 | |||
JP | B2 | JP6530796 | Sep 26, 2017 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | Jun 12, 2019 | |||
JP | B2 | JP6706312 | Dec 12, 2018 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 投射光学系 | Jun 03, 2020 |
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
NITTOH INC | SUWA-SHI NAGANO 392-0131 |
International Classification(s)

- 2017 Application Filing Year
- G02B Class
- 11360 Applications Filed
- 8685 Patents Issued To-Date
- 76.46 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Matsuo, Takahiko | Nagano, JP | 16 | 79 |
# of filed Patents : 16 Total Citations : 79 |
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Patent Citation Ranking
- 1 Citation Count
- G02B Class
- 43.63 % this patent is cited more than
- 5 Age
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- No Forward Cites to Display

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