CN105700282A - Rear projection device - Google Patents
Rear projection device Download PDFInfo
- Publication number
- CN105700282A CN105700282A CN201610272182.7A CN201610272182A CN105700282A CN 105700282 A CN105700282 A CN 105700282A CN 201610272182 A CN201610272182 A CN 201610272182A CN 105700282 A CN105700282 A CN 105700282A
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- Prior art keywords
- reflecting mirror
- light
- screen
- scialyscope
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000010287 polarization Effects 0.000 claims description 30
- 230000011514 reflex Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract description 6
- 208000029257 vision disease Diseases 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 229920005479 Lucite® Polymers 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
- G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention discloses a rear projection device, which comprises a screen and a projection unit, wherein the projection unit comprises a first projector, a second projector, a first reflector and a second reflector; a light beam emitted from the first projector is reflected to the screen through the first reflector to form a first optical domain; the light beam emitted from the second projector is reflected to the screen through the second reflector to form a second optical domain; and the edge of the first optical domain and the edge of the second optical domain are provided with a common edge. The rear projection device disclosed by the invention can achieve seamless splicing of multiple images on a large screen; the images displayed on the screen have integrality, and are elegant in appearance; a vision disorder since the border blocks the images is avoided; and the rear projection device has relatively abundant expressive force.
Description
Technical field
The present invention relates to back projection device, particularly relate to a kind of back projection device。
Background technology
" rear-projection " i.e. rear projection, is make use of projection and principle of reflection, screen and optical projection system is placed in the imaging system of one。In projection display apparatus, it is divided into orthographic projection (FrontProjection) and back projection two ways by its projection pattern Projection Display。It is exactly scialyscope that orthographic projection is the most directly applied, and refers to that light projects the development of screen front。And its principle of back projection is the bottom being arranged in fuselage by scialyscope in simple terms, signal, through reflection, projects the development of the translucent screen back side。Back projection TV is exactly the product of this principle, and due to being integrated of scialyscope and screen, system need not be carried out pH effect by the user of back projection TV so that its ease of use greatly exceed front projection machine。The thickness of usual back projecting system is thicker, is not suitable for general family and uses, but its frame is narrower, is suitable for giant-screen and does the splicing of polylith image。
But, existing as splicing the back projection device used or substantially it can be seen that its frame, affect the overall display effect of screen after splicing。
Summary of the invention
Goal of the invention: the defect existed for above-mentioned prior art, it is desirable to provide a kind of back projection device of polylith image seamless splicing on screen。
Technical scheme: a kind of back projection device, including screen and projecting cell, projecting cell includes the first scialyscope, the second scialyscope, the first reflecting mirror and the second reflecting mirror, the light beam that first scialyscope sends reflexes to screen through the first reflecting mirror and forms the first area of light, the light beam that second scialyscope sends reflexes to screen through the second reflecting mirror and forms the second area of light, and there is a common edge at the edge of the first area of light and the edge of the second area of light。
Preferably, the first reflecting mirror and the second reflecting mirror are all coated with reflection of polarization film；The light beam that first scialyscope sends becomes the first polarized beam through the second reflecting mirror, and the first polarized beam reflexes to screen through the first reflecting mirror and forms the first area of light；The second light beam that second scialyscope sends becomes the second polarized beam through the first reflecting mirror, and the second polarized beam reflexes to screen through the second reflecting mirror and forms the second area of light。
Further preferably, it is equipped with polarized light conversion device before the camera lens of the first scialyscope and before the camera lens of the second scialyscope；First reflecting mirror and the second reflecting mirror are all coated with reflection of polarization film；The light beam that first scialyscope sends becomes the first polarized beam through polarized light conversion device, and the first polarized beam reflexes to screen through the second reflecting mirror then through the first reflecting mirror and forms the first area of light；The light beam that second scialyscope sends becomes the second polarized beam through polarized light conversion device, and the second polarized beam reflexes to screen through the first reflecting mirror then through the second reflecting mirror and forms the second area of light。
It is furthermore preferred that the polarization direction of the first polarized beam is orthogonal with the polarization direction of the second polarized beam。
It is furthermore preferred that the first reflecting mirror and the second reflecting mirror are all coated with highly reflecting films。
It is furthermore preferred that highly reflecting films are metal film or deielectric-coating。
It is furthermore preferred that screen is transparent screen。
Beneficial effect: compared to existing technology, back projection device provided by the invention can realize the seamless split of polylith image on a giant-screen so that the image more globality of display on screen, elegant in appearance；Avoid because frame intercepts the visual disorder that image brings, there is more rich representability。Further, the structure that the reflection of polarization film adopted in a preferred approach enables to whole back projection device is compacter, and volume is less, takies less space；And natural light effectively can be changed required polarized light thus reducing the optical energy loss owing to polarization of light causes by the polarized light conversion device adopted in another preferred version, Showing Effectiveness On Screen is more preferably。
Accompanying drawing explanation
The structural representation that Fig. 1 (a), Fig. 1 (b) are the embodiment of the present invention 1；
The structural representation that Fig. 2 (a), Fig. 2 (b) are the embodiment of the present invention 2；
Fig. 3 is the structural representation of the embodiment of the present invention 3。
Detailed description of the invention
Embodiment 1: a kind of back projection device, if Fig. 1 (a) is the front view of the present embodiment back projection device, the top view that not shown screen 1, Fig. 1 (b) is the present embodiment back projection device。
Including screen 1 and projecting cell。Screen 1 is transparent screen 1, selects glass screen 1, it is also possible to for lucite screen 1 in the present embodiment；Projecting cell includes the first scialyscope the 2, second scialyscope the 3, first reflecting mirror 4 and the second reflecting mirror 5；First reflecting mirror 4 and the second reflecting mirror 5 are all coated with highly reflecting films, the reflectance > 90% of highly reflecting films, and the highly reflecting films in the present embodiment are metal film, and highly reflecting films can also be deielectric-coating。
The light beam that first scialyscope 2 sends reflexes to screen 1 through the first reflecting mirror 4 and forms the first area of light 6, the light beam that second scialyscope 3 sends reflexes to screen 1 through the second reflecting mirror 5 and forms the second area of light 7, and there is a common edge at the edge of the first area of light 6 and the edge of the second area of light 7。
The present embodiment show only in Fig. 1 the structure of a projecting cell, emergent ray angle according to scialyscope, the angle of the first reflecting mirror 4 and the second reflecting mirror 5 is rationally set, can so that when light beam that the light beam that sends of the first scialyscope 2 and the second scialyscope 3 send projects on screen 1, the edge of the first area of light 6 and the edge of the second area of light 7 just have a limit to overlap, i.e. common edge, gap is not had between two width images, therefore can forming a seamless image, the light 3 transmitted through screen 1 incides in human eye。
Back projection device provided by the invention can also include multiple projecting cell, and all gapless is adjacent each other for multiple area of light that multiple projecting cells are formed, and pieces together a complete image on a screen 1。
Embodiment 2: a kind of back projection device, Fig. 2 (a) is the front view of the present embodiment back projection device, the top view that not shown screen 1, Fig. 2 (b) is the present embodiment back projection device。
Including screen 1 and projecting cell。Screen 1 is transparent screen 1, selects glass screen 1, it is also possible to for lucite screen 1 in the present embodiment；Projecting cell includes the first scialyscope the 2, second scialyscope the 3, first reflecting mirror 4 and the second reflecting mirror 5；First reflecting mirror 4 and the second reflecting mirror 5 are all coated with highly reflecting films, the reflectance > 90% of highly reflecting films, and the highly reflecting films in the present embodiment are metal film, and highly reflecting films can also be deielectric-coating。
First reflecting mirror 4 and the second reflecting mirror 5 are all coated with reflection of polarization film；Wherein the first polarization state is reflected by the polarizing coating of the first reflecting mirror 4, and to the second polarization state transmission, the second polarization state is reflected by the polarizing coating of the second reflecting mirror 5, to the first polarization state transmission。
The light of the first scialyscope 2 and the second scialyscope 3 outgoing is nature polarized light；
The light beam that first scialyscope 2 sends becomes the first polarized beam through the second reflecting mirror 5, and the first polarized beam is the first polarization state, and the first polarized beam reflexes to screen 1 through the first reflecting mirror 4 and forms the first area of light 6；
The second light beam that second scialyscope 3 sends becomes the second polarized beam through the first reflecting mirror 4, and the second polarized beam is the second polarization state, and the second polarized beam reflexes to screen 1 through the second reflecting mirror 5 and forms the second area of light 7；
There is a common edge at the edge of the first area of light 6 and the edge of the second area of light 7；The polarization direction of the first polarized beam is orthogonal with the polarization direction of the second polarized beam, and in the present embodiment, the first polarized beam is horizontal line polarisation, and the second polarized beam is vertical line polarisation；First polarized beam can also be left-hand polarization light, and the second corresponding polarized beam is right-handed polarized light。
The present embodiment show only in Fig. 2 the structure of a projecting cell, emergent ray angle according to scialyscope, the angle of the first reflecting mirror 4 and the second reflecting mirror 5 is rationally set, can so that when light beam that the light beam that sends of the first scialyscope 2 and the second scialyscope 3 send projects on screen 1, the edge of the first area of light 6 and the edge of the second area of light 7 just have a limit to overlap, i.e. common edge, gap is not had between two width images, therefore can forming a seamless image, the light 3 transmitted through screen 1 incides in human eye。
Back projection device provided by the invention can also include multiple projecting cell, and all gapless is adjacent each other for multiple area of light that multiple projecting cells are formed, and pieces together a complete image on a screen 1。
The present embodiment is compared with embodiment 1, the present embodiment is in the top view shown in Fig. 2 (b), after the first scialyscope 2 can be positioned over the second reflecting mirror 5, after the second scialyscope 3 can be positioned over the first reflecting mirror 4, so overall border width can be narrower, more save space and elegant in appearance；It is noted that " afterwards " stated is only in the drawings as the aid illustration in orientation herein, it is therefore an objective to help to understand position relationship in the drawings, but not the concrete of technical solution of the present invention is limited。
Embodiment 3: as it is shown on figure 3, a kind of back projection device, including screen 1 and projecting cell。Screen 1 is transparent screen 1, selects glass screen 1, it is also possible to for lucite screen 1 in the present embodiment；Projecting cell includes the first scialyscope the 2, second scialyscope the 3, first reflecting mirror 4 and the second reflecting mirror 5；First reflecting mirror 4 and the second reflecting mirror 5 are all coated with highly reflecting films, the reflectance > 90% of highly reflecting films, and the highly reflecting films in the present embodiment are metal film, and highly reflecting films can also be deielectric-coating；Being equipped with polarized light conversion device 8 before the camera lens of the first scialyscope 2 and before the camera lens of the second scialyscope 3, compared with embodiment 2, light efficiency can be promoted 20%-30% by the polarized light conversion device 8 that the present embodiment increases。
First reflecting mirror 4 and the second reflecting mirror 5 are all coated with reflection of polarization film；Wherein the first polarization state is reflected by the polarizing coating of the first reflecting mirror 4, and to the second polarization state transmission, the second polarization state is reflected by the polarizing coating of the second reflecting mirror 5, to the first polarization state transmission。
The light of the first scialyscope 2 and the second scialyscope 3 outgoing is nature polarized light；
The light beam that first scialyscope 2 sends becomes the first polarized beam through polarized light conversion device 8, and the first polarized beam is the first polarization state, and the first polarized beam reflexes to screen 1 through the second reflecting mirror 5 then through the first reflecting mirror 4 and forms the first area of light 6；
The light beam that second scialyscope 3 sends becomes the second polarized beam through polarized light conversion device 8, and the second polarized beam is the second polarization state, and the second polarized beam reflexes to screen 1 through the first reflecting mirror 4 then through the second reflecting mirror 5 and forms the second area of light 7。
There is a common edge at the edge of the first area of light 6 and the edge of the second area of light 7；The polarization direction of the first polarized beam is orthogonal with the polarization direction of the second polarized beam, and in the present embodiment, the first polarized beam is horizontal line polarisation, and the second polarized beam is vertical line polarisation；First polarized beam can also be left-hand polarization light, and the second corresponding polarized beam is right-handed polarized light。
The present embodiment figure show only the structure of a projecting cell, emergent ray angle according to scialyscope, the angle of the first reflecting mirror 4 and the second reflecting mirror 5 is rationally set, can so that when light beam that the light beam that sends of the first scialyscope 2 and the second scialyscope 3 send projects on screen 1, the edge of the first area of light 6 and the edge of the second area of light 7 just have a limit to overlap, i.e. common edge, gap is not had between two width images, therefore can forming a seamless image, the light 3 transmitted through screen 1 incides in human eye。
Back projection device provided by the invention can also include multiple projecting cell, and all gapless is adjacent each other for multiple area of light that multiple projecting cells are formed, and pieces together a complete image on a screen 1。
The present embodiment is compared with embodiment 1, after the first scialyscope 2 can be positioned over the second reflecting mirror 5, after the second scialyscope 3 can be positioned over the first reflecting mirror 4, so overall border width can be narrower, more saves space and elegant in appearance；It is noted that " afterwards " stated is only in the drawings as the aid illustration in orientation herein, it is therefore an objective to help to understand position relationship in the drawings, but not the concrete of technical solution of the present invention is limited。
Below it is only the preferred embodiment of the present invention; it should be understood that; above-described embodiment is only for illustrating technology design and the feature of the present invention; its object is to for skilled in the art realises that present disclosure and implementing according to this; not detailed description of the invention is exhaustive, can not limit the scope of the invention with this。All modifying according to technical scheme or equivalent replace, without deviating from objective and the scope of technical solution of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention。
Claims (7)
1. a back projection device, including screen (1) and projecting cell, it is characterized in that, described projecting cell includes the first scialyscope (2), second scialyscope (3), first reflecting mirror (4) and the second reflecting mirror (5), the light beam that first scialyscope (2) sends reflexes to screen (1) through the first reflecting mirror (4) and forms the first area of light (6), the light beam that second scialyscope (3) sends reflexes to screen (1) through the second reflecting mirror (5) and forms the second area of light (7), there is a common edge at the edge of the first area of light (6) and the edge of the second area of light (7)。
2. back projection device according to claim 1, it is characterised in that described first reflecting mirror (4) and the second reflecting mirror (5) are all coated with reflection of polarization film；The light beam that first scialyscope (2) sends becomes the first polarized beam through the second reflecting mirror (5), and the first polarized beam reflexes to screen (1) through the first reflecting mirror (4) and forms the first area of light (6)；The second light beam that second scialyscope (3) sends becomes the second polarized beam through the first reflecting mirror (4), and the second polarized beam reflexes to screen (1) through the second reflecting mirror (5) and forms the second area of light (7)。
3. back projection device according to claim 2, it is characterised in that be equipped with polarized light conversion device (8) before the camera lens of described first scialyscope (2) and before the camera lens of the second scialyscope (3)；First reflecting mirror (4) and the second reflecting mirror (5) are all coated with reflection of polarization film；The light beam that first scialyscope (2) sends becomes the first polarized beam through polarized light conversion device (8), and the first polarized beam reflexes to screen (1) through the second reflecting mirror (5) then through the first reflecting mirror (4) and forms the first area of light (6)；The light beam that second scialyscope (3) sends becomes the second polarized beam through polarized light conversion device (8), and the second polarized beam reflexes to screen (1) through the first reflecting mirror (4) then through the second reflecting mirror (5) and forms the second area of light (7)。
4. the back projection device according to Claims 2 or 3, it is characterised in that the polarization direction of the first polarized beam is orthogonal with the polarization direction of the second polarized beam。
5. back projection device according to claim 1, it is characterised in that described first reflecting mirror (4) and the second reflecting mirror (5) are all coated with highly reflecting films。
6. back projection device according to claim 5, it is characterised in that described highly reflecting films are metal film or deielectric-coating。
7. back projection device according to claim 1, it is characterised in that described screen (1) is transparent screen (1)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272182.7A CN105700282B (en) | 2016-04-28 | 2016-04-28 | Back projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610272182.7A CN105700282B (en) | 2016-04-28 | 2016-04-28 | Back projection device |
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| Publication Number | Publication Date |
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| CN105700282A true CN105700282A (en) | 2016-06-22 |
| CN105700282B CN105700282B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610272182.7A Expired - Fee Related CN105700282B (en) | 2016-04-28 | 2016-04-28 | Back projection device |
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| CN (1) | CN105700282B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647130A (en) * | 2017-03-07 | 2017-05-10 | 海信集团有限公司 | Back-projection splicing unit and system, and back-projection splicing unit adjusting method |
| CN108121143A (en) * | 2018-02-07 | 2018-06-05 | 全普光电科技(上海)有限公司 | A kind of micro- projector equipment |
| CN108663886A (en) * | 2018-04-24 | 2018-10-16 | 深圳摩方新材科技有限公司 | A kind of optical system of multi-project mode splicing |
| WO2019204983A1 (en) * | 2018-04-24 | 2019-10-31 | 深圳摩方新材科技有限公司 | Optical system for splicing multiple projection planes |
| CN112333495A (en) * | 2019-11-04 | 2021-02-05 | 青岛海信激光显示股份有限公司 | Focus switching method, display device and system |
| CN113671782A (en) * | 2021-10-21 | 2021-11-19 | 成都极米科技股份有限公司 | Projection equipment |
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| JPH08102899A (en) * | 1995-10-13 | 1996-04-16 | Hitachi Ltd | Projection multi-image display device |
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| CN201054066Y (en) * | 2007-06-12 | 2008-04-30 | 亚洲光学股份有限公司 | Rear projection apparatus |
| CN201233496Y (en) * | 2008-07-29 | 2009-05-06 | 北京环宇蓝博科技有限公司 | Front maintaining back projection splicing wall |
| CN105404012A (en) * | 2015-12-25 | 2016-03-16 | 刘飞 | Double-machine high-luminous efficiency stereo projection system |
| CN205721052U (en) * | 2016-04-28 | 2016-11-23 | 南京先进激光技术研究院 | Back projection device |
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| JPH08102899A (en) * | 1995-10-13 | 1996-04-16 | Hitachi Ltd | Projection multi-image display device |
| US5902030A (en) * | 1998-05-29 | 1999-05-11 | Blanchard; Randall D. | System for displaying images from multiple projectors onto a common screen |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647130A (en) * | 2017-03-07 | 2017-05-10 | 海信集团有限公司 | Back-projection splicing unit and system, and back-projection splicing unit adjusting method |
| CN106647130B (en) * | 2017-03-07 | 2018-09-28 | 海信集团有限公司 | back projection splicing unit, system and back projection splicing unit adjusting method |
| CN108121143A (en) * | 2018-02-07 | 2018-06-05 | 全普光电科技(上海)有限公司 | A kind of micro- projector equipment |
| CN108663886A (en) * | 2018-04-24 | 2018-10-16 | 深圳摩方新材科技有限公司 | A kind of optical system of multi-project mode splicing |
| WO2019204983A1 (en) * | 2018-04-24 | 2019-10-31 | 深圳摩方新材科技有限公司 | Optical system for splicing multiple projection planes |
| CN112333495A (en) * | 2019-11-04 | 2021-02-05 | 青岛海信激光显示股份有限公司 | Focus switching method, display device and system |
| CN112383802A (en) * | 2019-11-04 | 2021-02-19 | 青岛海信激光显示股份有限公司 | Focus switching method, projection display device and system |
| CN112333495B (en) * | 2019-11-04 | 2022-12-30 | 青岛海信激光显示股份有限公司 | Focus switching method, display device and system |
| CN113671782A (en) * | 2021-10-21 | 2021-11-19 | 成都极米科技股份有限公司 | Projection equipment |
| CN113671782B (en) * | 2021-10-21 | 2022-02-15 | 成都极米科技股份有限公司 | Projection equipment |
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|---|---|
| CN105700282B (en) | 2018-04-06 |
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