CN101477295B - Projection device - Google Patents
Projection device Download PDFInfo
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- CN101477295B CN101477295B CN2008100019500A CN200810001950A CN101477295B CN 101477295 B CN101477295 B CN 101477295B CN 2008100019500 A CN2008100019500 A CN 2008100019500A CN 200810001950 A CN200810001950 A CN 200810001950A CN 101477295 B CN101477295 B CN 101477295B
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- light beam
- optical element
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- light
- diffusion sheet
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Abstract
The invention provides a projection device, which comprises a first light source, a second light source, a light combination element, a diffusion sheet and an actuating element. The first light source provides a first light beam; the second light source provides a second light beam; the first light beam and the second light beam are incident upon the light combination element, and are mixed into a mixed light beam in the light combination element; the diffusion sheet is arranged on the surface of the light combination element; and the actuating element is arranged on the light combination element to actuate the light combination element.
Description
Technical field
The present invention relates to a kind of projection arrangement, relate in particular to a kind of projection arrangement that can reduce speckle interference (SpeckleInterferometry).
Background technology
When using LASER Light Source,, cause the degradation of projection image or image quality is unintelligible because the high coherence of laser is easy to generate speckle interference (Speckle Interferometry) as the light source of projection arrangement.Therefore, the coherence who needs extra diffused component to reduce laser beam.
Patents such as prior art such as U.S. Pat 5313479, US 6594090, US 6874893 and US 6005722 are set up extra diffused component among all only being taught in light path, are used to reduce the coherence of laser beam.Yet, set up quantity and cost that extra diffused component can increase optical element, and can increase the volume of whole optical-mechanical system, simultaneously, also increased the design difficulty of optical-mechanical system.
Summary of the invention
Fundamental purpose of the present invention is to integrate diffused component and closes optical element, reduces the quantity and the cost of optical element thus.
Other purpose of the present invention and advantage can be further understood from technical characterictic disclosed in this invention.
For reaching above-mentioned one or part or whole purposes or other purpose, the projection arrangement of one embodiment of the invention comprises: first LASER Light Source provides first light beam with high coherence; Second LASER Light Source provides second light beam with high coherence; The 3rd LASER Light Source provides the 3rd light beam with high coherence; Close optical element, comprise first surface, wherein, described first light beam, described second light beam and described the 3rd light beam are incident to the described optical element that closes, and blend together light beam at the described optical element that closes; Diffusion sheet is located on the described described first surface that closes optical element, for described first light beam, described second light beam and described the 3rd light beam incident; And actuation element, connect the described optical element that closes, to activate the described optical element that closes, be used to change the position that described first light beam, described second light beam and described the 3rd light beam are incident to described diffusion sheet.
Projection arrangement also is provided in another embodiment, comprises: first LASER Light Source provides first light beam with high coherence; Second LASER Light Source provides second light beam with high coherence; The 3rd LASER Light Source provides the 3rd light beam with high coherence; Close optical element, wherein, described first light beam, described second light beam and the described optical element that closes of described the 3rd light beam incident, and blend together light beam in the described optical element that closes; Diffusion sheet is located on the described first surface that closes optical element, for described first light beam, described second light beam and described the 3rd light beam incident; First actuation element connects described first LASER Light Source, to activate described first LASER Light Source, is used to change the position that described first light beam is incident to described diffusion sheet; Second actuation element connects described second LASER Light Source, to activate described second LASER Light Source, is used to change the position that described second light beam is incident to described diffusion sheet; And the 3rd actuation element, connect described the 3rd LASER Light Source, to activate described the 3rd LASER Light Source, be used to change the position that described the 3rd light beam is incident to described diffusion sheet.
Use the present invention,, therefore can reduce the quantity of optical element, dwindle the volume of whole optical-mechanical system, and simplify the design difficulty of optical-mechanical system because diffusion sheet directly is located at the surface of closing optical element with plated film or the mode pasted.
Description of drawings
Fig. 1 shows the projection arrangement of first embodiment of the invention;
Fig. 2 shows the thin portion structure of closing optical element of first embodiment;
Fig. 3 a shows the situation that optical element is closed in the actuation element rotation;
Fig. 3 b shows the situation that optical element is closed in the actuation element vibration;
Fig. 4 shows the thin portion structure of diffusion sheet;
Fig. 5 shows the projection arrangement of second embodiment of the invention;
Fig. 6 a shows the projection arrangement of third embodiment of the invention;
Fig. 6 b shows the thin portion structure of closing optical element of the 3rd embodiment;
Fig. 7 shows the projection arrangement of fourth embodiment of the invention;
Fig. 8 a shows that the integration rod front end is provided with the situation of light collecting element;
Fig. 8 b, 8c show the light collecting element of hollow;
Fig. 8 d, 8e show solid light collecting element.
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in DETAILED DESCRIPTION OF THE PREFERRED, can clearly present below in conjunction with accompanying drawing.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are directions with reference to the accompanying drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the present invention.
With reference to Fig. 1, the projection arrangement 100 that it shows first embodiment of the invention comprises first light source 110, secondary light source 120, the 3rd light source 130, closes optical element 140, closes optical element 150, lens combination 161, integration rod 162, illuminating lens group 163, light valve (optical valve) 164 and projecting mirror group 165.First light source 110 provides first light beam 111.Secondary light source 120 provides second light beam 121.The 3rd light source 130 provides the 3rd light beam 131.This first light beam 111, this second light beam 121 and the 3rd light beam 131 have high coherence.This closes optical element 140 this first light beam 111 and this second light beam, 121 incidents, and closes optical element 140 at this and blend together light beam 101.This closes optical element 150 to blend together light beam 101 and 131 incidents of the 3rd light beam, and closes optical element 150 at this and blend together light beam 102.Blend together light beam 102 and close optical element 150,, be projeced into projection plane 166 through this lens combination 161, integration rod 162, illuminating lens group 163, light valve 164 and projecting mirror group 165 from this.
Above-mentioned light valve 164 can be digital micromirror elements (DMD) or monocrystalline silicon LCD panel (LCOS) or other light varying element.This first light source 110 is a green-light source, and this secondary light source 120 is a red-light source, and the 3rd light source 130 is a blue light source.
With reference to Fig. 2, close optical element 140 and be dichronic mirror, comprise first surface (light-emitting face) 141 and second surface 142.Diffusion sheet 143 is located on this first surface 141.This closes optical element 140 to this first light beam 111 from these second surface 142 incidents, and this second light beam 121 closes these first surface 141 reflections of optical element 140 at this.This first light beam 111 forms first luminous point 112 on these diffusion sheet 143 surfaces, this second light beam 121 forms second luminous point 122 on these diffusion sheet 143 surfaces.Actuation element 144 is located at this and closes on the optical element 140, and wherein, this actuation element 144 activates this and closes optical element 140, and the position on this diffusion sheet 143 with this first luminous point 112 of continuous variation and this second luminous point 122 is thus to reduce the coherence of laser beam.Close and also be provided with diffusion sheet and actuation element on the optical element 150, and the operation of closing optical element 150 is similar in appearance to closing optical element 140, it is described in detail in this and does not add tired stating.
With reference to Fig. 3 a, in first embodiment, this actuation element 144 can be motor, closes optical element 140 by rotating this, the position on this diffusion sheet 143 with this first luminous point 112 of continuous variation and this second luminous point 122.With reference to Fig. 3 b, this actuation element 144 also can be Vib., closes optical element 140 by vibrating this, the position on this diffusion sheet 143 with this first luminous point 112 of continuous variation and this second luminous point 122.
With reference to Fig. 4, this diffusion sheet 143 can be the screw type diffusion sheet.
Use the present invention,, therefore can reduce the quantity of optical element, dwindle the volume of whole optical-mechanical system, and simplify the design difficulty of optical-mechanical system because diffusion sheet directly is located at the surface of closing optical element with plated film or the mode pasted.
With reference to Fig. 5, it shows the projection arrangement 100 ' of second embodiment of the invention, its characteristics are, actuation element changed be connected on the light source, first light source 110 is provided with that first actuation element 113, secondary light source 120 are provided with second actuation element 123, the 3rd light source 130 is provided with the 3rd actuation element 133.By this first actuation element 113, second actuation element 123 and the 3rd actuation element 133, vibrate this first light source 110, this secondary light source 120 and the 3rd light source 130, thus, the continuous variation irradiate light that this light source sent is to the position of closing on the optical element, and the coherence who reduces laser beam.
With reference to Fig. 6 a, it shows the projection arrangement 200 of third embodiment of the invention, its characteristics are, with light-combining prism (X-Prism) as closing optical element, close optical element 210 and comprise a plurality of light entrance faces 212 and light-emitting face (first surface) 211, this closes optical element 210 in these light entrance face 212 incidents for this first light beam 111, this second light beam 121 and the 3rd light beam 131, blendes together light beam 102 with formation.Blending together light beam 102 leaves this from this light-emitting face 211 and closes optical element 210.This light-emitting face 211 is provided with diffusion sheet 220.Auxiliary with reference to Fig. 6 b, the bottom of closing optical element 210 is provided with actuation element 230, and this closes optical element 210 these actuation element 230 vibrations, and this blendes together light beam 102 and exposes to position on this diffusion sheet 220 with continuous variation.
With reference to Fig. 7, it shows the projection arrangement 200 ' of fourth embodiment of the invention, with the 3rd embodiment, its with light-combining prism (X-Prism) as closing optical element.Simultaneously, with second embodiment, its characteristics are, actuation element are changed be connected on the light source, and first light source 110 is provided with that first actuation element 113, secondary light source 120 are provided with second actuation element 123, the 3rd light source 130 is provided with the 3rd actuation element 133.By this first actuation element 113, second actuation element 123 and the 3rd actuation element 133, vibrate this first light source 110, this secondary light source 120 and the 3rd light source 130, thus, the continuous variation irradiate light that this light source sent is to the position of closing on the optical element, and the coherence who reduces laser beam.
Use the present invention, light beam is through after the diffusion sheet, it is big that the dispersion angle of light beam can become, when using Vib., then light beam also can vibrate and cause the efficient beam size to increase, at this moment, can redesign the receipts light rate of lens combination, and scioptics group receipts light, make light beam all enter integration rod haply, can improve light utilization efficiency.In addition, with reference to Fig. 8 a, the front end of integration rod 162 can be provided with light collecting element 1621, for example, taper reflex housing (cap-rod or tapered rod), it has for the light entrance face 1623 that blendes together light beam incident; And area is less than the light-emitting face 1624 of the area of light entrance face, the area of this light-emitting face 1624 is less than the area of this light entrance face 1623, this blendes together light beam through this this integration rod of light-emitting face 1624 incidents, increase the area of light entrance face by light collecting element, and the divergent rays of collection wide-angle, can further improve light utilization efficiency.With reference to Fig. 8 b, 8c, light collecting element 1621 can be hollow component, and its surface is coated with the material of high reflectance.With reference to Fig. 8 d, 8e, light collecting element 1621 ' also can be solid member, and it is by mode lead beams such as total reflection or surface coatings.The cross section of light collecting element 1621 can be different shapes such as square, circle or multiangular.
The above only is the preferred embodiments of the present invention, and when not limiting scope of the invention process with this, promptly all simple equivalent of being done according to claim of the present invention and invention description content change and modify, and all still belong to the scope that patent of the present invention contains.Arbitrary embodiment of the present invention in addition or claim must not reached whole purpose disclosed in this invention or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting interest field of the present invention.
Claims (20)
1. projection arrangement comprises:
First LASER Light Source provides first light beam with high coherence;
Second LASER Light Source provides second light beam with high coherence;
The 3rd LASER Light Source provides the 3rd light beam with high coherence;
Close optical element, comprise first surface, wherein, described first light beam, described second light beam and described the 3rd light beam are incident to the described optical element that closes, and blend together light beam at the described optical element that closes;
Diffusion sheet is located on the described described first surface that closes optical element, for described first light beam, described second light beam and described the 3rd light beam incident; And
Actuation element connects the described optical element that closes, and to activate the described optical element that closes, is used to change the position that described first light beam, described second light beam and described the 3rd light beam are incident to described diffusion sheet.
2. projection arrangement as claimed in claim 1, wherein, the described optical element that closes is a dichronic mirror.
3. projection arrangement as claimed in claim 2, wherein, the described optical element that closes also comprises second surface, described first light beam is incident to the described optical element that closes through described second surface, and the described diffusion sheet on the described first surface of process leaves the described optical element that closes, and on described diffusion sheet, form first luminous point, described second light beam is incident to the described optical element that closes through described second surface, and the described diffusion sheet on the described first surface of process leaves the described optical element that closes, and on described diffusion sheet, form second luminous point, and described the 3rd light beam is incident to the described optical element that closes through described second surface, and leave the described optical element that closes, and on described diffusion sheet, form the 3rd luminous point through the described diffusion sheet on the described first surface.
4. projection arrangement as claimed in claim 3, wherein, described actuation element comprises motor, the described optical element that closes of described actuation element rotation, with described first luminous point of continuous variation with, described second luminous point and the position of described the 3rd luminous point on described diffusion sheet.
5. projection arrangement as claimed in claim 3, wherein, described actuation element is a Vib., the described optical element that closes of described actuation element vibration, with described first luminous point of continuous variation with, described second luminous point and the position of described the 3rd luminous point on described diffusion sheet.
6. projection arrangement as claimed in claim 1, wherein, the described optical element that closes is a light-combining prism.
7. projection arrangement as claimed in claim 6, wherein, the described optical element that closes comprises a plurality of light entrance faces and light-emitting face, described first light beam, described second light beam and described the 3rd light beam are incident to the described optical element that closes through described light entrance face, and leaving the described optical element that closes through described light-emitting face, described first surface is described light-emitting face.
8. projection arrangement as claimed in claim 7, wherein, described actuation element is a Vib., the described optical element that closes of described actuation element vibration is with the described position of light beam on described diffusion sheet that blend together of continuous variation.
9. projection arrangement as claimed in claim 1, wherein, described diffusion sheet is the screw type diffusion sheet.
10. projection arrangement as claimed in claim 1, it also comprises receives optical lens group and integration rod, and wherein, the described light beam that blendes together is through the described integration rod of described receipts optical lens group incident.
11. projection arrangement as claimed in claim 10, it also comprises light collecting element, and described light collecting element is arranged on the front end of described integration rod, and described light collecting element has light entrance face, supplies the described light beam incident that blendes together; And light-emitting face, the area of described light-emitting face is less than the area of described light entrance face, and the described light beam that blendes together is through the described integration rod of described light-emitting face incident.
12. a projection arrangement comprises:
First LASER Light Source provides first light beam with high coherence;
Second LASER Light Source provides second light beam with high coherence;
The 3rd LASER Light Source provides the 3rd light beam with high coherence; Close optical element, wherein, described first light beam, described second light beam and the described optical element that closes of the 3rd light beam incident, and blend together light beam in the described optical element that closes;
Diffusion sheet is located on the described first surface that closes optical element, for described first light beam, described second light beam and described the 3rd light beam incident;
First actuation element connects described first LASER Light Source, to activate described first LASER Light Source, is used to change the position that described first light beam is incident to described diffusion sheet;
Second actuation element connects described second LASER Light Source, to activate described second LASER Light Source, is used to change the position that described second light beam is incident to described diffusion sheet; And
The 3rd actuation element connects described the 3rd LASER Light Source, to activate described the 3rd LASER Light Source, is used to change the position that described the 3rd light beam is incident to described diffusion sheet.
13. projection arrangement as claimed in claim 12, wherein, described first actuation element, described second actuation element and the 3rd actuation element are respectively Vib..
14. projection arrangement as claimed in claim 13, wherein, the described optical element that closes is a dichronic mirror.
15. projection arrangement as claimed in claim 14, wherein, the described optical element that closes also comprises second surface, described first light beam is through the described optical element that closes of described second surface incident, and the described diffusion sheet on the described first surface of process leaves the described optical element that closes, and on described diffusion sheet, form first luminous point, described second light beam is incident to the described optical element that closes through described second surface, and the described diffusion sheet on the described first surface of process leaves the described optical element that closes, and on described diffusion sheet, form second luminous point, and described the 3rd light beam is incident to the described optical element that closes through described second surface, and the described diffusion sheet on the described first surface of process leaves the described optical element that closes, and on described diffusion sheet, form the 3rd luminous point, described first actuation element, described second actuation element and the 3rd actuation element vibrate described first LASER Light Source respectively, described second LASER Light Source and the 3rd LASER Light Source are with described first luminous point of continuous variation, described second luminous point and the position of the 3rd luminous point on described diffusion sheet.
16. projection arrangement as claimed in claim 12, wherein, the described optical element that closes is a light-combining prism.
17. projection arrangement as claimed in claim 16, wherein, the described optical element that closes comprises a plurality of light entrance faces and light-emitting face, described first light beam, described second light beam and described the 3rd light beam are through the described optical element that closes of described light entrance face incident, and leaving the described optical element that closes through described light-emitting face, described first surface is described light-emitting face.
18. projection arrangement as claimed in claim 12, wherein, described diffusion sheet is the screw type diffusion sheet.
19. projection arrangement as claimed in claim 12, it also comprises lens combination and integration rod, and wherein, the described light beam that blendes together is through the described integration rod of described lens combination incident.
20. projection arrangement as claimed in claim 19, it also comprises light collecting element, and described light collecting element is arranged on the front end of described integration rod, and described light collecting element has light entrance face, supplies the described light beam incident that blendes together; And light-emitting face, the area of described light-emitting face is less than the area of described light entrance face, and the described light beam that blendes together is through the described integration rod of described light-emitting face incident.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100019500A CN101477295B (en) | 2008-01-04 | 2008-01-04 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100019500A CN101477295B (en) | 2008-01-04 | 2008-01-04 | Projection device |
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| Publication Number | Publication Date |
|---|---|
| CN101477295A CN101477295A (en) | 2009-07-08 |
| CN101477295B true CN101477295B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100019500A Active CN101477295B (en) | 2008-01-04 | 2008-01-04 | Projection device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015105347A1 (en) * | 2014-01-09 | 2015-07-16 | Samsung Electronics Co., Ltd. | Wearable display apparatus |
| CN113031287A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Optical integrator, speckle suppression device and laser display system thereof |
| CN113031256B (en) * | 2019-12-09 | 2023-05-09 | 觉芯电子(无锡)有限公司 | Micro-mirror integrating lens array, micro-mirror preparation method and laser display system |
| CN115373206B (en) * | 2021-05-21 | 2024-05-24 | 中强光电股份有限公司 | Illumination system and projection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532587A (en) * | 2003-03-20 | 2004-09-29 | ���ǵ�����ʽ���� | Projection system using space color filter |
| CN1826557A (en) * | 2003-07-22 | 2006-08-30 | 松下电器产业株式会社 | Two-dimensional image forming apparatus |
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2008
- 2008-01-04 CN CN2008100019500A patent/CN101477295B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532587A (en) * | 2003-03-20 | 2004-09-29 | ���ǵ�����ʽ���� | Projection system using space color filter |
| CN1826557A (en) * | 2003-07-22 | 2006-08-30 | 松下电器产业株式会社 | Two-dimensional image forming apparatus |
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| CN101477295A (en) | 2009-07-08 |
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