CN102411250A - Rear projector display system possessing touch point identification function - Google Patents
Rear projector display system possessing touch point identification function Download PDFInfo
- Publication number
- CN102411250A CN102411250A CN2010102889731A CN201010288973A CN102411250A CN 102411250 A CN102411250 A CN 102411250A CN 2010102889731 A CN2010102889731 A CN 2010102889731A CN 201010288973 A CN201010288973 A CN 201010288973A CN 102411250 A CN102411250 A CN 102411250A
- Authority
- CN
- China
- Prior art keywords
- photomodulator
- touch point
- display system
- imageing sensor
- optical lens
- 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.)
- Pending
Links
Images
Landscapes
- Projection Apparatus (AREA)
- Position Input By Displaying (AREA)
Abstract
A rear projector display system possessing a touch point identification function relates to a rear projection system. The rear projector display system possessing the touch point identification function comprises: a projector main body and a projection screen. The projector main body comprises: a light modulator, an optical lens and a camera system. The camera system comprises an image sensor. A spectral component is arranged between the light modulator and the optical lens. The spectral component forms a transmission relation with the light which is in a direction of from the light modulator to the optical lens. The spectral component forms a reflective relation with the light which is in the direction of from the optical lens to the light modulator. The image sensor is arranged at the reflective direction. The camera system simultaneously uses the optical lens in the projector main body. Therefore, compared to the existed system in which a projector is separated from a camera, a group of the optical lenses with high costs can be saved.
Description
Technical field
The present invention relates to a kind of electronic applications, relate in particular to a kind of back projecting system.
Background technology
Along with development of science and technology, back projecting system being used just more and more widely by people.Back projecting system is widely used in places such as exhibition, classroom, meeting-place.
People often have the needs that carry out touch operation to display frame in addition.The touching technique that now combines with back projecting system mostly is to place a video camera at the display frame rear, through the interactive information of video camera picked-up object and display frame.Video camera sends the picture that is absorbed to computing machine, and computing machine is accomplished touch operation control through analyzing picture and then drawing touch action information.
This structure needs projector and video camera two complete equipments, has that cost is high, big, shortcoming such as the complicated debugging of needs, touch action seizure out of true when installing takes up room.
Summary of the invention
The object of the present invention is to provide a kind of rear-projection display system, to solve the problems of the technologies described above with touch point recognition function.
The technical matters that the present invention solved can adopt following technical scheme to realize:
Rear-projection display system with touch point recognition function; Comprise a projector's main body and a projection screen; Said projector main body comprises a photomodulator, an optical lens, and said projector main body is positioned at said projection screen rear, it is characterized in that; Also comprise a camera system, said camera system comprises an imageing sensor;
Be provided with a beam splitter between said photomodulator and the said optical lens;
Said beam splitter is for being the transmission relation from said photomodulator to the light of said optical lens direction;
Said beam splitter is provided with said imageing sensor for being reflective relation from said optical lens direction to the light of said photomodulator direction on its reflection direction.
In the technique scheme, camera system is used the said optical lens in projector's main body simultaneously, like this with respect to existing employing projector for system that video camera separates, can save the higher said optical lens of a cover cost.
Said projector main body comprises a projector shell, and said camera system is arranged in the said projector shell.Can make the total system designs simplification like this, needn't specially reserve the position for laying of video camera again, also needn't too much debug video camera.And then can in the installation of total system and debugging, save a large amount of man power and materials.
Is exiting surface with said beam splitter near the one side of said optical lens, and the angle between said exiting surface and said photomodulator is 45 degree, and the angle between said exiting surface and the said imageing sensor is 45 to spend.
According to the light path principle of reversibility, the light that is penetrated by said exiting surface forms images in the external world through the light that said optical lens penetrates, and (part) light of the position of its imaging can reversely return, and forms images at said photomodulator place.In the above-mentioned design, the light of optical lens the place ahead being penetrated back through beam splitter reflects, and reflexes to said imageing sensor, in said imageing sensor imaging.
According to the light path principle of reversibility, on said imageing sensor received picture pairing outside boundary region, be similar to the outer boundary region at the picture place that projector's main body projects.That is to say; Under with the imaging scope of projector's main body situation as the touch area that allows to carry out touch operation; The picture that is appeared on the said imageing sensor just in time (or approximate) is the picture of whole touch area, helps reducing image in the extraneous non-touch area to the influence of touch operation.
Said imageing sensor and said photomodulator are through said exiting surface symmetry arrangement.Like this in projector's main body under the situation that presents picture rich in detail on the projection screen, according to the light path principle of reversibility, near the picture the projection screen also can present distinct image on said imageing sensor.Therefore after the drop shadow effect that adjusts projector's main body, camera system obtains distinct image naturally, needn't extra adjustment camera system.
Said beam splitter can adopt light splitting piece, also can adopt optical prism, like right-angle prism, can also adopt other optical elements to be achieved.
Said imageing sensor can adopt ccd image sensor or COMS imageing sensor.Ccd image sensor has the characteristics clearly that form images.The COMS imageing sensor has lower-cost characteristics.
Said photomodulator can adopt LCOS photomodulator or DLP photomodulator.The LCOS photomodulator has the characteristics clearly that form images.The DLP photomodulator maturation that possesses skills, present stage lower-cost characteristics.
Press down the reflection touch panel in the said projection screen employing one entirely, the said interior full reflection touch panel that presses down comprises a transparent plate body, and said transparent plate body avris is provided with infrared light supply.The part IR that infrared light supply produces forms total reflection in said transparent plate body, when the touch point was arranged, total reflection condition was by broken ring, thereby the place, touch point can form a bright spot.This bright spot can be obtained by imageing sensor, and sends computing machine to, identifies this touch point.
Said imageing sensor should adopt the imageing sensor with infrared image receiving ability.To adapt to infrared image.
Beneficial effect: the optical system among the present invention; Possess simultaneously that the image that light modulator modulates is gone out carries out projection and the touch optical signalling that projection screen returns is sent to the dual-use function of imageing sensor; Because projection and the shared camera lens of imaging system, system has that volume is little, simple in structure, low cost and other advantages.
Description of drawings
Fig. 1 is a kind of structural representation of projector of the present invention main body and imageing sensor position relation;
Fig. 2 is an one-piece construction synoptic diagram of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, further set forth the present invention below in conjunction with concrete diagram.
With reference to Fig. 1, Fig. 2, have the rear-projection display system of touch point recognition function, comprise projector's main body and projection screen 7, projector's main body is positioned at projection screen 7 rears, and projector's main body comprises a photomodulator 1, an optical lens 4.Also comprise a camera system, camera system comprises an imageing sensor 5.In the technique scheme, camera system is used the optical lens 4 in projector's main body simultaneously, like this with respect to existing employing projector for system that video camera separates, can save the higher optical lens 4 of a cover cost.
Be provided with a beam splitter 2 between photomodulator 1 and the optical lens 4.Beam splitter 2 can adopt light splitting piece, also can adopt optical prism, like right-angle prism, can also adopt other optical elements to be achieved.Photomodulator 1 can adopt LCOS photomodulator or DLP photomodulator.The LCOS photomodulator has the characteristics clearly that form images.The DLP photomodulator maturation that possesses skills, present stage lower-cost characteristics.Beam splitter 2 is for being the transmission relation from photomodulator 1 to the light of optical lens 4 directions.Beam splitter 2 is provided with imageing sensor 5 for being reflective relation from optical lens 4 directions to the light of photomodulator 1 direction on its reflection direction.Imageing sensor 5 can adopt ccd image sensor or COMS imageing sensor.Ccd image sensor has the characteristics clearly that form images.The COMS imageing sensor has lower-cost characteristics.
Projector's main body comprises a projector shell, and camera system is arranged in the projector shell.Can make the total system designs simplification like this, needn't specially reserve the position for laying of video camera again, also needn't too much debug video camera.And then can in the installation of total system and debugging, save a large amount of man power and materials.Is exiting surface with beam splitter 2 near the one side of optical lens 4, and the angle that exiting surface and photomodulator are 1 is 45 degree, and the angle between exiting surface and the imageing sensor 5 is 45 to spend.
According to the light path principle of reversibility, the light that is penetrated by exiting surface is penetrated 4 light that go out through optical lens and is formed images in the external world, and (part) light of the position of its imaging can reversely return, and forms images at photomodulator 1 place.In the above-mentioned design, the light of penetrating back through 2 pairs of optical lens 4 the place aheads of beam splitter reflects, and reflexes to imageing sensor 5, in imageing sensor 5 imagings.According to the light path principle of reversibility, on imageing sensor 5 received picture pairing outside boundary region, be similar to the outer boundary region at the picture place that projector's main body projects.That is to say; Under with the imaging scope of projector's main body situation as the touch area that allows to carry out touch operation; The picture that is appeared on the imageing sensor 5 just in time (or approximate) is the picture of whole touch area, helps reducing image in the extraneous non-touch area to the influence of touch operation.
Imageing sensor 5 passes through the exiting surface symmetry arrangement with photomodulator 1.Like this in projector's main body appearing on the projection screen 7 under the situation of picture rich in detail, according to the light path principle of reversibility, near the pictures the projection screen 7 also can present distinct image on imageing sensor 5.Therefore after the drop shadow effect that adjusts projector's main body, camera system obtains distinct image naturally, needn't extra adjustment camera system.
Press down the reflection touch panel in projection screen 7 employings one entirely, the interior full reflection touch panel that presses down comprises a transparent plate body.Transparent plate body avris is provided with infrared light supply 6.The part IR that infrared light supply 6 produces forms total reflection in transparent plate body, when the touch point was arranged, total reflection condition was by broken ring, thereby the place, touch point can form a bright spot.This bright spot can be obtained by imageing sensor 5, and sends computing machine to, identifies this touch point.Imageing sensor 5 should adopt the imageing sensor with infrared image receiving ability.To adapt to infrared image.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (10)
1. the rear-projection display system that has the touch point recognition function; Comprise a projector's main body and a projection screen; Said projector main body comprises a photomodulator, an optical lens, and said projector main body is positioned at said projection screen rear, it is characterized in that; Also comprise a camera system, said camera system comprises an imageing sensor;
Be provided with a beam splitter between said photomodulator and the said optical lens;
Said beam splitter is for being the transmission relation from said photomodulator to the light of said optical lens direction;
Said beam splitter is provided with said imageing sensor for being reflective relation from said optical lens direction to the light of said photomodulator direction on its reflection direction.
2. the rear-projection display system with touch point recognition function according to claim 1 is characterized in that, said projector main body comprises a projector shell, and said camera system is arranged in the said projector shell.
3. the rear-projection display system with touch point recognition function according to claim 2; It is characterized in that; Is exiting surface with said beam splitter near the one side of said optical lens; Angle between said exiting surface and said photomodulator is 45 degree, and the angle between said exiting surface and the said imageing sensor is 45 degree.
4. the rear-projection display system with touch point recognition function according to claim 3 is characterized in that, said imageing sensor and said photomodulator are through said exiting surface symmetry arrangement.
5. the rear-projection display system with touch point recognition function according to claim 1 is characterized in that, said beam splitter adopts light splitting piece.
6. the rear-projection display system with touch point recognition function according to claim 4 is characterized in that, said imageing sensor adopts ccd image sensor.
7. the rear-projection display system with touch point recognition function according to claim 1 is characterized in that, said photomodulator adopts the LCOS photomodulator.
8. the rear-projection display system with touch point recognition function according to claim 1 is characterized in that, said photomodulator adopts the DLP photomodulator.
9. the rear-projection display system with touch point recognition function according to claim 1; It is characterized in that; Press down the reflection touch panel in the said projection screen employing one entirely, the said interior full reflection touch panel that presses down comprises a transparent plate body, and said transparent plate body avris is provided with infrared light supply.
10. the rear-projection display system with touch point recognition function according to claim 1 is characterized in that, said imageing sensor adopts the imageing sensor with infrared image receiving ability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102889731A CN102411250A (en) | 2010-09-21 | 2010-09-21 | Rear projector display system possessing touch point identification function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102889731A CN102411250A (en) | 2010-09-21 | 2010-09-21 | Rear projector display system possessing touch point identification function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102411250A true CN102411250A (en) | 2012-04-11 |
Family
ID=45913399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102889731A Pending CN102411250A (en) | 2010-09-21 | 2010-09-21 | Rear projector display system possessing touch point identification function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102411250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135587A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Projection device and projection interaction method |
-
2010
- 2010-09-21 CN CN2010102889731A patent/CN102411250A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135587A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Projection device and projection interaction method |
| CN113126405A (en) * | 2019-12-31 | 2021-07-16 | 华为技术有限公司 | Projection device and projection interaction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203012335U (en) | Automatic focusing projection system | |
| US9016872B2 (en) | Projector and method for projecting image from projector | |
| CN103324012B (en) | Interactive projection device | |
| WO2012039969A3 (en) | Interactive display | |
| WO2009139995A3 (en) | Gaze accurate video conferencing | |
| CN102004378B (en) | Method for adjusting projection picture and projection device | |
| WO2007103181A3 (en) | Transparent screen displaying images visible from one side only | |
| CN103425354A (en) | Data processing apparatus, display apparatus, and method for controlling the data processing apparatus | |
| GB0118866D0 (en) | Shaped taper flat panel display | |
| WO2006041834A3 (en) | Interactive projection system and method | |
| TW200622468A (en) | Video projector for dome screen | |
| TWI504931B (en) | Projection system and projection method thereof | |
| CN102411249A (en) | One-piece projector with touch function | |
| CN201804195U (en) | Rear protection display system capable of generating touch screen on projection screen | |
| CN104714769B (en) | data processing method and electronic equipment | |
| CN103596639A (en) | Automatic focusing projection system | |
| CN201804194U (en) | Handheld projector with touch function | |
| CN102411250A (en) | Rear projector display system possessing touch point identification function | |
| TW200606457A (en) | Projection system | |
| US20100149436A1 (en) | Projector and method for acquiring coordinate of bright spot | |
| JP2012181721A (en) | Position input device, projector, control method for projector, and display system | |
| US20090040355A1 (en) | Electronic mirror | |
| TW200606573A (en) | Image projection device | |
| CN201757882U (en) | Keyboard with mini projector and camera module | |
| CN204539259U (en) | A kind of mobile phone has the projection box of touch-control interactive function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120411 Assignee: Shanghai Uiworks Electronic Tech. Co., Ltd. Assignor: Cheng Shuyi Contract record no.: 2011310000010 Denomination of invention: Rear projector display system possessing touch point identification function License type: Exclusive License Record date: 20110221 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120411 |