JP2010152263A5 - - Google Patents
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- JP2010152263A5 JP2010152263A5 JP2008332966A JP2008332966A JP2010152263A5 JP 2010152263 A5 JP2010152263 A5 JP 2010152263A5 JP 2008332966 A JP2008332966 A JP 2008332966A JP 2008332966 A JP2008332966 A JP 2008332966A JP 2010152263 A5 JP2010152263 A5 JP 2010152263A5
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- Prior art keywords
- light
- screen
- area
- region
- right lower
- Prior art date
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Description
ここで、図8に示すように、スクリーン10に投写される光の光量低下が顕著となるのは、左右下端部分に投写される光である。そして、図9に示すように、スクリーン10の左右下端に投写される光(u,v,x,y点)は、防塵カバー204の第2領域16bとして設定された領域に入射し、それ以外のスクリーン10部分に投射される光(光量低下が顕著とならない光)は、ほとんどが防塵カバー204の第1領域16aとして設定された領域に入射する。
Here, as shown in FIG. 8 , it is the light projected on the left and right lower end portions that the light amount of the light projected onto the screen 10 is significantly reduced. As shown in FIG. 9, the light (u, v, x, y points) projected on the left and right lower ends of the screen 10 enters the region set as the second region 16 b of the dustproof cover 204, and the others Most of the light projected onto the screen 10 portion (light whose light amount does not significantly decrease) enters the region set as the first region 16 a of the dust cover 204.
実施例で説明した防塵カバー4のように細かい領域設定をすれば、より多くの投写光をスクリーン10に到達させることができるが、本変形例1のように防塵カバー204の入射面を長手方向に3つに区分して領域を設定した場合でも、観察者に光量の低下を感じさせないようにすることができる。また、細かく領域を設定する場合に比べて、反射防止膜等の処理・加工が容易となり、コストの抑制を図ることができる。
If a fine area is set as in the dustproof cover 4 described in the embodiment, more projection light can reach the screen 10 , but the incident surface of the dustproof cover 204 is set in the longitudinal direction as in the first modification. Even when the area is divided into three areas, it is possible to prevent the observer from feeling a decrease in the amount of light. In addition, the processing and processing of the antireflection film and the like can be facilitated and costs can be reduced as compared with the case where the region is set finely.
ここで、図8に示すように、スクリーン10に投写される光の光量低下が顕著となるのは、左右下端部分に投写される光である。そして、図9に示すように、スクリーン10の左右下端に投写される光(u,v,x,y点)は、防塵カバー404の第2領域18bとして設定された領域に入射し、それ以外のスクリーン10部分に投射される光(光量低下が顕著とならない光)は、ほとんどが防塵カバー404の第1領域18aとして設定された領域に入射する。
Here, as shown in FIG. 8 , it is the light projected on the left and right lower end portions that the light amount of the light projected onto the screen 10 is significantly reduced. As shown in FIG. 9, the light (u, v, x, y points) projected on the left and right lower ends of the screen 10 is incident on the area set as the second area 18b of the dust cover 404, and the others. Most of the light projected onto the screen 10 portion (light whose light amount does not significantly decrease) enters the area set as the first area 18 a of the dust cover 404.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008332966A JP5309980B2 (en) | 2008-12-26 | 2008-12-26 | projector |
US12/642,280 US8434878B2 (en) | 2008-12-26 | 2009-12-18 | Proximity projector with a transmissive cover with modified reflectance properties |
CN200910258848.3A CN101770146B (en) | 2008-12-26 | 2009-12-25 | Projector |
US13/858,787 US8794772B2 (en) | 2008-12-26 | 2013-04-08 | Proximity projector having a dust-proof cover with an anti-reflection film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008332966A JP5309980B2 (en) | 2008-12-26 | 2008-12-26 | projector |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2010152263A JP2010152263A (en) | 2010-07-08 |
JP2010152263A5 true JP2010152263A5 (en) | 2012-01-19 |
JP5309980B2 JP5309980B2 (en) | 2013-10-09 |
Family
ID=42571394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008332966A Active JP5309980B2 (en) | 2008-12-26 | 2008-12-26 | projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5309980B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5544711B2 (en) * | 2008-12-26 | 2014-07-09 | セイコーエプソン株式会社 | projector |
JP5561087B2 (en) | 2010-10-14 | 2014-07-30 | 株式会社リコー | Image projection device |
US8901472B2 (en) * | 2011-08-16 | 2014-12-02 | Ricoh Company, Ltd. | Image displaying apparatus including a projection optical system and a reflective image display element with plural micro-mirrors |
JP6007478B2 (en) * | 2011-11-02 | 2016-10-12 | 株式会社リコー | Image display device |
JP6167492B2 (en) * | 2012-09-18 | 2017-07-26 | 株式会社リコー | Image display device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0193701A (en) * | 1987-10-05 | 1989-04-12 | Mitsubishi Electric Corp | Optical device |
JP3972956B2 (en) * | 2000-01-28 | 2007-09-05 | セイコーエプソン株式会社 | projector |
JP2005316250A (en) * | 2004-04-30 | 2005-11-10 | Fujinon Corp | Projector |
JP2007011248A (en) * | 2005-05-31 | 2007-01-18 | Victor Co Of Japan Ltd | Projection type display apparatus |
JP2007214078A (en) * | 2006-02-13 | 2007-08-23 | Seiko Epson Corp | Light source device, and projector |
JP5181637B2 (en) * | 2006-12-04 | 2013-04-10 | 株式会社リコー | Image projection device |
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2008
- 2008-12-26 JP JP2008332966A patent/JP5309980B2/en active Active
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