JP2008191279A5 - - Google Patents
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- JP2008191279A5 JP2008191279A5 JP2007023703A JP2007023703A JP2008191279A5 JP 2008191279 A5 JP2008191279 A5 JP 2008191279A5 JP 2007023703 A JP2007023703 A JP 2007023703A JP 2007023703 A JP2007023703 A JP 2007023703A JP 2008191279 A5 JP2008191279 A5 JP 2008191279A5
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- Prior art keywords
- display device
- image display
- intermediate image
- light
- diffusion
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- 238000009792 diffusion process Methods 0.000 claims 20
- 230000003287 optical Effects 0.000 claims 12
- 238000003384 imaging method Methods 0.000 claims 8
- 230000000051 modifying Effects 0.000 claims 3
- 210000001747 Pupil Anatomy 0.000 claims 1
- 230000001427 coherent Effects 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000000875 corresponding Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
Claims (14)
可干渉性を有する光を発する光源と、
前記光源からの光を用いて中間像を形成する中間像形成部と、
前記中間像からの光を、前記表示面上に結像させる結像光学系と、
前記中間像が形成される中間像形成面からずれた位置であって、前記中間像形成部内を含む前記中間像形成部から前記結像光学系までの光の経路のいずれかの位置に拡散面を有し、前記拡散面に沿った面内における拡散性を時間的に変化させる拡散性変動部と、
を備えることを特徴とする画像表示装置。 An image display device that projects an image on a display surface,
A light source that emits coherent light;
An intermediate image forming unit that forms an intermediate image using light from the light source;
An imaging optical system for forming light from the intermediate image on the display surface;
A diffusing surface at a position shifted from the intermediate image forming surface on which the intermediate image is formed, at any position on the light path from the intermediate image forming unit to the imaging optical system, including the inside of the intermediate image forming unit A diffusivity variation part that temporally changes the diffusivity in a plane along the diffusion surface;
An image display device comprising:
前記拡散性変動部は、
前記拡散面を構成する拡散素子と、
前記拡散素子を前記拡散面に沿った方向で揺動させる拡散面揺動部と、
を備えることを特徴とする画像表示装置。 The image display device according to claim 1,
The diffusivity variation part is
A diffusion element constituting the diffusion surface;
A diffusion surface swinging portion that swings the diffusion element in a direction along the diffusion surface;
An image display device comprising:
前記拡散性変動部は、
前記拡散面に対応し、前記拡散面に沿って複数の領域に区分された位相制御面を有し、各領域の電極に印加される駆動電圧に応じて、前記各領域から射出される光の位相特性を制御する位相制御デバイスと、
前記各領域の電極に前記駆動電圧を印加する位相制御デバイス駆動部と、を備え、
前記位相制御デバイス駆動部は、
前記領域ごとに、それぞれ、ランダムに変化する電圧を前記駆動電圧として印加して、前記領域ごとに、それぞれ、ランダムに位相特性を変化させることにより、前記位相制御面としての前記拡散面に沿った面内における拡散性を時間的に変化させる
ことを特徴とする画像表示装置。 The image display device according to claim 1,
The diffusivity variation part is
The phase control surface corresponding to the diffusion surface and divided into a plurality of regions along the diffusion surface, and according to the drive voltage applied to the electrodes of each region, the light emitted from each region A phase control device for controlling the phase characteristics;
A phase control device drive unit that applies the drive voltage to the electrodes in each region,
The phase control device driver is
For each of the regions, a randomly changing voltage is applied as the driving voltage, and the phase characteristics are changed randomly for each of the regions, thereby along the diffusion surface as the phase control surface. An image display device characterized by temporally changing in-plane diffusivity.
前記中間像形成部は
前記光源からの光を前記画像に応じて変調することにより前記画像を表す光を射出する光変調デバイスと、
前記光変調デバイスからの光を前記中間像形成面上で前記中間像として結像させる中間像結像光学系と、を備え、
前記中間像形成部から前記結像光学系までの光の経路は、前記光変調デバイスから前記結像光学系までの光の経路である
ことを特徴とする画像表示装置。 The image display device according to any one of claims 1 to 3 ,
The intermediate image forming unit emits light representing the image by modulating light from the light source according to the image; and
An intermediate image forming optical system that forms light from the light modulation device as the intermediate image on the intermediate image forming surface;
The light path from the intermediate image forming unit to the imaging optical system is a light path from the light modulation device to the imaging optical system.
前記中間像形成部は、前記光源からの光に基づく前記画像を表す光を走査する走査デバイスを備え、
前記中間像形成部から前記結像光学系までの光の経路は、前記走査デバイスから前記結像光学系までの光の経路である
ことを特徴とする画像表示装置。 The image display device according to any one of claims 1 to 3 ,
The intermediate image forming unit includes a scanning device that scans light representing the image based on light from the light source,
The light path from the intermediate image forming unit to the imaging optical system is a light path from the scanning device to the imaging optical system.
前記中間像形成部は、さらに、前記走査デバイスからの光を前記中間像形成面上で前記中間像として結像させる中間像結像光学系を備える
ことを特徴とする画像表示装置。 The image display device according to claim 5 ,
The intermediate image forming unit further includes an intermediate image forming optical system that forms light from the scanning device as the intermediate image on the intermediate image forming surface.
前記中間像結像光学系はテレセントリック光学系であることを特徴とする画像表示装置。 The image display device according to claim 4 or 6 ,
The image display apparatus according to claim 1, wherein the intermediate image forming optical system is a telecentric optical system.
前記拡散面は、前記中間像形成面を中心とする前記結像光学系の焦点深度の外側の近傍位置に配置されることを特徴とする画像表示装置。 An image display device according to any one of claims 1 to 7 ,
The image display apparatus according to claim 1, wherein the diffusion surface is disposed at a position near the outside of a focal depth of the imaging optical system with the intermediate image forming surface as a center.
前記拡散面は、前記中間像結像光学系内の瞳の位置に配置されることを特徴とする画像表示装置。 The image display device according to claim 7 ,
The image display apparatus, wherein the diffusion surface is disposed at a position of a pupil in the intermediate image imaging optical system.
前記拡散面を第２の拡散面とし、
前記中間像形成面の位置に、第１の拡散面を構成する拡散素子を備えることを特徴とする画像表示装置。 An image display device according to any one of claims 1 to 9 ,
The diffusion surface as a second diffusion surface;
An image display device comprising a diffusion element constituting a first diffusion surface at a position of the intermediate image forming surface.
前記第２の拡散面の拡散性は前記第１の拡散面の拡散性より小さいことを特徴とする画像表示装置。 The image display device according to claim 10 ,
An image display device characterized in that the diffusivity of the second diffusing surface is smaller than that of the first diffusing surface.
前記第１の拡散面を構成する拡散素子の拡散粒子サイズは、前記中間像の画素の大きさよりも小さいことを特徴とする画像表示装置。 The image display device according to claim 10 or 11 ,
An image display device, wherein a diffusion particle size of a diffusion element constituting the first diffusion surface is smaller than a pixel size of the intermediate image.
前記第１の拡散面を構成する拡散素子は、射出する光の拡がりの角度を所望の角度範囲に設定可能な拡散素子により構成されることを特徴とする画像表示装置。 The image display device according to claim 10 or 11 ,
The image display device, wherein the diffusing element constituting the first diffusing surface is constituted by a diffusing element capable of setting a spread angle of emitted light within a desired angle range.
前記射出する光の拡がりの角度を所望の角度範囲に設定可能な拡散素子はホログラムを利用した拡散素子であり、前記ホログラムの凹凸ピッチは、前記中間像の画素の大きさよりも小さいことを特徴とする画像表示装置。 The image display device according to claim 13 ,
The diffusion element capable of setting the angle of spread of the emitted light to a desired angle range is a diffusion element using a hologram, and the uneven pitch of the hologram is smaller than the size of the pixel of the intermediate image. An image display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007023703A JP4924069B2 (en) | 2007-02-02 | 2007-02-02 | Image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007023703A JP4924069B2 (en) | 2007-02-02 | 2007-02-02 | Image display device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008191279A JP2008191279A (en) | 2008-08-21 |
| JP2008191279A5 true JP2008191279A5 (en) | 2009-09-24 |
| JP4924069B2 JP4924069B2 (en) | 2012-04-25 |
Family
ID=39751466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007023703A Active JP4924069B2 (en) | 2007-02-02 | 2007-02-02 | Image display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4924069B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201019032A (en) * | 2008-11-05 | 2010-05-16 | Young Optics Inc | Laser projection system |
| JP5187183B2 (en) * | 2008-12-24 | 2013-04-24 | セイコーエプソン株式会社 | Scanning image display device |
| JP2010256572A (en) | 2009-04-23 | 2010-11-11 | Olympus Corp | Projection display device |
| JP5313029B2 (en) | 2009-04-23 | 2013-10-09 | オリンパス株式会社 | Projection display |
| US8172404B2 (en) * | 2009-05-21 | 2012-05-08 | Eastman Kodak Company | Projection with lenslet arrangement on speckle reduction element |
| US8366281B2 (en) * | 2009-05-21 | 2013-02-05 | Eastman Kodak Company | Out-of-plane motion of speckle reduction element |
| WO2011040479A1 (en) * | 2009-09-29 | 2011-04-07 | 三洋電機株式会社 | Optical unit, projection image display device, and diffusion optical element |
| JP5452318B2 (en) | 2010-03-31 | 2014-03-26 | 日立コンシューマエレクトロニクス株式会社 | Laser projector |
| JP2012113183A (en) * | 2010-11-26 | 2012-06-14 | Dainippon Printing Co Ltd | Hologram reproduction device |
| JP6471424B2 (en) * | 2013-11-13 | 2019-02-20 | セイコーエプソン株式会社 | projector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6747781B2 (en) * | 2001-06-25 | 2004-06-08 | Silicon Light Machines, Inc. | Method, apparatus, and diffuser for reducing laser speckle |
| US6594090B2 (en) * | 2001-08-27 | 2003-07-15 | Eastman Kodak Company | Laser projection display system |
| JP4290095B2 (en) * | 2004-08-16 | 2009-07-01 | キヤノン株式会社 | Display optical system and image display system |
-
2007
- 2007-02-02 JP JP2007023703A patent/JP4924069B2/en active Active
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