CN101221346A - Projection device - Google Patents
Projection device Download PDFInfo
- Publication number
- CN101221346A CN101221346A CNA2007100014269A CN200710001426A CN101221346A CN 101221346 A CN101221346 A CN 101221346A CN A2007100014269 A CNA2007100014269 A CN A2007100014269A CN 200710001426 A CN200710001426 A CN 200710001426A CN 101221346 A CN101221346 A CN 101221346A
- Authority
- CN
- China
- Prior art keywords
- optical
- wavelength
- filtering portion
- optical filtering
- light
- 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
Abstract
The invention discloses a projecting apparatus, comprising an illuminating system, a projection module and at least one filter, wherein the illuminating system is used to emit an illuminating light beam; the projection module is used to receive the illuminating light beam form the illuminating system and projecting an image on the screen. The filter is arranged in the illuminating system and on a light path defined by the light beam, and is provided with a first light filtering part and a second light filtering part. The minimum penetrating light wavelength within a penetrating light wavelength range of the second light filtering part is bigger than minimum penetrating light wavelength within a penetrating light wavelength range of the first light filtering part.
Description
Technical field
The present invention is about a kind of projection arrangement, and reduces smear phenomenon and spuious light leak especially in regard to a kind of different optical filtering portions or echo area of utilizing, and can keep the projection arrangement of image brilliance.
Background technology
Projector utilizes an illuminator that one illuminating bundle is provided, utilize digital micro-mirror assembly (DigitalMicro-Mirror Device again, DMD) illuminating bundle is converted to image strip, the projection lens of arranging in pairs or groups afterwards is projected to image strip one screen and forms image.Wherein, f number (f/number) the may command image brilliance of projection lens, the numerical value (number) of f number (f/number) is more little, and stop opening is big more, and it is big more to go into light quantity, otherwise then low more.Therefore, during design projector, can adopt the less projection lens of numerical value of f number usually, the brightness of projector can be promoted.
Please refer to Fig. 1, be light fan (ray-fan) figure of the projection lens of the numerical value less (being f/2) that adopts the f number.As seen from the figure, the ruddiness of different wave length, green glow and blue light are inconsistent in the pairing aberration amount of imaging surface, especially wavelength can obviously depart from normal imaging position than the wide-angle light beam in the short blue light, this will cause, and blue light is peripheral to form serious smear, and causes image smear (flare) and can't know focusing.Can in projection lens or illuminator, add a lighttight catch at present, to stop the wide-angle light beam that enters projector, but the wide-angle light beam of the method in block blue light, also can stop the wide-angle light beam in ruddiness and the green glow, and cause the brightness of projector to descend.
Moreover the outer light absorbent (dark coating) that can be coated with usually of the active zone of DMD (zone that promptly has micromirror array) is so as to reducing parasitic light (stray light).But light absorbent is also also inequality to the reflectivity of each wavelength light beam, has higher reflectivity for the short blue light of wavelength usually, and the parasitic light of reflection can spill blue light by projection lens, and can cause the local location in the image to have more blueness.Especially when image during, when promptly each micromirror all is in off status (off state) among the DMD, observe out local blue light leak with more obvious for black picture.At present solution is to add a lighttight catch in illuminator, and the light beam of off status can not entered in the projection lens, but the method also can stop ruddiness and green glow, and cause the brightness of projector to descend similarly except that block blue light.
Summary of the invention
A purpose of the present invention is providing a kind of projection arrangement exactly, is to utilize different optical filtering portions or echo area to reduce smear phenomenon and spuious light leak, and can keeps image brilliance.
According to purpose of the present invention, a kind of projection arrangement is proposed, comprise illuminator, projection module and at least one optical filter.Illuminator is in order to penetrating illuminating bundle, and projection module is in order to receiving the illuminating bundle from illuminator, and throws image according to this.Optical filter is arranged in the illuminator and is positioned on the defined light path of illuminating bundle, and optical filter has the first optical filtering portion and the second optical filtering portion.Wherein, the minimal penetration optical wavelength that penetrates optical wavelength range of the second optical filtering portion is greater than the minimal penetration optical wavelength that penetrates optical wavelength range of the first optical filtering portion, and perhaps the maximum penetration optical wavelength that penetrates optical wavelength range of this second optical filtering portion is less than the maximum penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion.
According to purpose of the present invention, a kind of projection arrangement is proposed, comprise illuminator and projection module, illuminator comprises light source, light source then comprises lamp source and reflex housing.The lamp source is in order to produce illuminating bundle.Reflex housing has first echo area and second echo area, illuminating bundle is assembled in order to reflection in first echo area and second echo area, wherein, the minimal reflection optical wavelength of the reflected light wavelength scope of second echo area is greater than the minimal reflection optical wavelength of the first echo area wavelength coverage, and perhaps the maximum reflection optical wavelength of the reflected light wavelength scope of this second echo area is less than the maximum reflection optical wavelength of this first echo area wavelength coverage.Projection module is in order to receiving the illuminating bundle from illuminator, and throws image according to this.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below:
Description of drawings
Fig. 1 is the light fan figure of traditional projection lens.
Fig. 2 A is the synoptic diagram of the projection arrangement of first embodiment of the invention.
Fig. 2 B is the synoptic diagram of the optical filter among Fig. 2 A.
Fig. 3 A is the synoptic diagram of the digital micro-mirror assembly of Fig. 2 A.
Fig. 3 B is the synoptic diagram of the optical filter of the second embodiment of the present invention.
Fig. 4 is the cut-open view of the light source of Fig. 2 A.
The primary clustering symbol description
100: projection arrangement
110: illuminator
111: light source
111a: reflex housing
111b: lamp source
112: the color generation device
113: integration rod
114: lens combination
115: catoptron
116: relay lens
130: projection module
130a: light valve
130b: projection lens
140,140 ': optical filter
141,141 ': the first optical filtering portion
142,142 ': the second optical filtering portion
M: micro-reflector
S: aperture
L: illuminating bundle
I: image strip
I: image
A1: active zone
A2: extinction applying area
R1: first echo area
R2: second echo area
Embodiment
First embodiment
Please refer to Fig. 2 A, the projection arrangement 100 of first embodiment of the invention comprises illuminator 110, projection module 130 and at least one optical filter 140.Illuminator 110 is in order to penetrating illuminating bundle L, and projection module 130 is in order to receiving the illuminating bundle L from illuminator 110, and throws an image I according to this on a screen (figure does not show).
In addition, shown in Fig. 2 B, optical filter 140 has the first optical filtering portion 141 and the second optical filtering portion 142 (shown in the oblique line scope), and the minimal penetration optical wavelength that penetrates optical wavelength range of the second optical filtering portion 142 is greater than the minimal penetration optical wavelength that penetrates optical wavelength range of the first optical filtering portion 141.The first optical filtering portion 141 is circular, and the second optical filtering portion 142 is an annular, and the second optical filtering portion 142 is around the first optical filtering portion 141.
In the present embodiment, except optical filter 140 is arranged at illuminator 110 interior conjugate positions corresponding to aperture S position, the optical wavelength range that penetrates of the first optical filtering portion 141 comprises red light wavelength scope, green wavelength and blue light wavelength scope, and the optical wavelength range that penetrates of the second optical filtering portion 141 comprises red light wavelength scope and green wavelength.For example: the optical wavelength range that penetrates of the first optical filtering portion 141 is 440nm～720nm, and the optical wavelength range that penetrates of the second optical filtering portion 142 is 550nm～850nm.So as to when illuminating bundle by behind the optical filter 140, can penetrate for the visible light (being ruddiness, green glow and blue light) among the illuminating bundle L in the first optical filtering portion 141, but and, and only allow ruddiness and green glow among the illuminating bundle L penetrate in the second optical filtering portion, 142 block blue light.Whereby, can filter among the illuminating bundle L blue light that can produce smear, can avoid simultaneously stopping the smear phenomenon is not had the ruddiness of influence and green glow and influences the brightness of projection arrangement by the setting of the second optical filtering portion 142.
Thus, for ruddiness and green glow, the effective aperture of the optical filter 140 that can penetrate is greater than blue light, and can be under the brightness that does not influence ruddiness and green glow, and the blue light light quantity that only filters part reduces the smear phenomenon.Certainly, looking actual design, may be the coloured light of other wavelength coverage but not blue light can produce smear.At this moment, can in response to change two optical filtering portions penetrate optical wavelength range contain the difference part, reach effect same.For example, if the coloured light generation smear that wavelength coverage is long, the maximum penetration optical wavelength that penetrates optical wavelength range that promptly can the second optical filtering portion 142 filters relevant wave band coloured light less than the mode of the maximum penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion 141.For example, when ruddiness can smear take place, the optical wavelength range that penetrates of the first optical filtering portion can be comprised ruddiness, green glow and blue light wavelength scope, the optical wavelength range that penetrates of the second optical filtering portion comprises green glow and blue light wavelength scope.
Second embodiment
Please refer to Fig. 3 A and Fig. 3 B, Fig. 3 A is the synoptic diagram of the digital micro-mirror assembly of Fig. 2 A, and Fig. 3 B is the synoptic diagram of the optical filter of the second embodiment of the present invention.As shown in Figure 3A, digital micro-mirror assembly (being light valve 130a) comprises that an active zone A1 and is located at extinction coating (darkcoating) the district A2 of active zone A1 periphery.Active zone A1 is for being arranged with the zone of micro-reflector m with array way, extinction applying area A2 is then in order to reduce the parasitic light among the image I.
In addition, extinction applying area A2 is higher than the reflectivity of the outer light beam of first wavelength coverage for the reflectivity of the light beam in one first wavelength coverage, and first wavelength coverage for example is the blue light wavelength scope.The corresponding extinction applying area A2 of the second optical filtering portion 142 ' of optical filter 140 ' is provided with, and promptly the illuminating bundle L through the second optical filtering portion 142 ' of optical filter 140 ' is projected to extinction applying area A2.In the present embodiment, when optical filter 140 ' was arranged in the position of Fig. 2 A optical filter 140, the second optical filtering portion 142 ' of optical filter 140 ' was positioned at the edge (shown in Fig. 3 B) of optical filter 140 '.
The first optical filtering portion 141 ' and the second optical filtering portion 142 ' penetrate the design that optical wavelength range can be same as first embodiment, promptly the minimal penetration optical wavelength that penetrates optical wavelength range of the second optical filtering portion 142 is greater than the minimal penetration optical wavelength that penetrates optical wavelength range of the first optical filtering portion 141, and perhaps the maximum penetration optical wavelength that penetrates optical wavelength range of the second optical filtering portion 142 is less than the maximum penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion 141.Preferably, the optical wavelength range that penetrates of the second optical filtering portion 142 ' does not comprise first wavelength coverage, and the optical wavelength range that penetrates of the first optical filtering portion 141 ' comprises first wavelength coverage.For instance, when first wavelength coverage is blue light, the optical wavelength range that penetrates of the second optical filtering portion 142 ' is ruddiness and green wavelength, the optical wavelength range that penetrates of the first optical filtering portion 141 ' is blue light, ruddiness and green wavelength, be incident upon just only surplus lower ruddiness and the green glow of reflectivity of partial illumination light beam L of extinction applying area A2 so as to filtering through the second optical filtering portion 142 ', through the extinction effect of extinction applying area A2, just can significantly reduce the unlikely brightness that influences projection arrangement simultaneously of traditional light leak problem again.
And when first wavelength coverage is ruddiness, the optical wavelength range that penetrates of the second optical filtering portion 142 ' is blue light and green wavelength, the optical wavelength range that penetrates of the first optical filtering portion 141 ' is blue light, ruddiness and green wavelength, be incident upon just only surplus lower blue light and the green glow of reflectivity of partial illumination light beam L of extinction applying area A2 so as to filtering through the second optical filtering portion 142 ', through the extinction effect of extinction applying area A2, just can significantly reduce the unlikely brightness that influences projection arrangement simultaneously of traditional light leak problem again.
The 3rd embodiment
Please refer to Fig. 4, be the cut-open view of the light source 111 of Fig. 2 A.In the present embodiment, the inside surface of the reflex housing 111a of light source 111 has one first echo area R1 and one second echo area R2, the second echo area R2 is positioned at the cover edge of reflex housing 111a and around the first echo area R1, the first echo area R1 and the second echo area R2 assemble illuminating bundle L in order to reflection, and the minimal reflection optical wavelength of the reflected light wavelength scope of the second echo area R2 is greater than the minimal reflection optical wavelength of the reflected light wavelength scope of the first echo area R1.
In the present embodiment, the reflected light wavelength scope of the first echo area R1 comprises ruddiness, green glow and blue light wavelength scope, the reflected light wavelength scope of the second echo area R2 comprises ruddiness and green wavelength, but so as to the first echo area R1 system reflect red, green glow and blue light, and the second echo area R2 only reflect red and green glow.Thus, utilize the second echo area R2 can avoid blu-ray reflection, and only allow ruddiness and green glow reflection among the illuminating bundle L, therefore, can filter among the illuminating bundle L blue light that can produce smear, can avoid simultaneously stopping the smear phenomenon is not had the ruddiness of influence and green glow and influences the brightness of projection arrangement.
Certainly, looking actual design, may be the coloured light of other wavelength coverage but not blue light can produce smear.At this moment, can in response to the reflected light wavelength scope that changes two echo areas contain the difference part, reach effect same.For example, if the long coloured light generation smear of wavelength coverage, the maximum reflection optical wavelength of reflected light wavelength scope that then can design second echo area is less than the maximum reflection optical wavelength of this first echo area wavelength coverage.For example, when smear can take place in ruddiness, the reflected light wavelength scope of first echo area can comprise ruddiness, green glow and blue light wavelength scope, the reflected light wavelength scope of second echo area comprises green glow and blue light wavelength scope, the ruddiness of smear be can produce so as to filtering among the illuminating bundle L, and blue light and green glow reflection among the illuminating bundle L only allowed.
And in the foregoing description, optical filtering portion 141,142,141 ', 142 ' or echo area R1, R2 also can be applied to other optical module in the projection arrangement 100 of Fig. 2 A.For example, for lens combination 114 or relay lens 116, a lens surface is made suitable film coated and is reached with the first optical filtering portion of optical filter and the effect of the second optical filtering portion therein.Perhaps, the reflex housing 111a as Fig. 4 on the minute surface of catoptron 115 designs first echo area and second echo area, reaches same effect.In addition, the foregoing description and associated change are also used collocation use together simultaneously.Reduce smear phenomenon and spuious light leak so long as projection arrangement utilization optical filtering portion or echo area are provided with, and can keep image brilliance, all do not depart from the scope of the present invention.
In sum, though the present invention with preferred embodiment openly as above, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (18)
1. projection arrangement comprises:
One illuminator is in order to penetrate an illuminating bundle;
One projection module in order to reception this illuminating bundle from this illuminator, and throws an image according to this; And
At least one optical filter, be arranged in this illuminator and be positioned on the defined light path of this illuminating bundle, this optical filter also has one first optical filtering portion and one second optical filtering portion, wherein the minimal penetration optical wavelength that penetrates optical wavelength range of this second optical filtering portion is greater than the minimal penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion, and perhaps the maximum penetration optical wavelength that penetrates optical wavelength range of this second optical filtering portion is less than the maximum penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion.
2. projection arrangement according to claim 1, wherein the optical wavelength range that penetrates of this first optical filtering portion comprises ruddiness, green glow and blue light wavelength scope, the optical wavelength range that penetrates of this second optical filtering portion comprises ruddiness and green wavelength.
3. projection arrangement according to claim 1, wherein this projection module comprises a light valve and a projection lens, this light valve is in order to receive this illuminating bundle, and produce an image strip according to this, this projection lens is in order to receive this image strip and to throw this image according to this, and this projection lens comprises an aperture, and this optical filter is positioned at the conjugation position corresponding to this aperture position.
4. projection arrangement according to claim 1, wherein this projection module comprises a light valve and a projection lens, this light valve comprises a digital micro-mirror assembly, this digital micro-mirror assembly comprises that an active zone and is located at an extinction applying area of active zone periphery, and this extinction applying area is higher than the reflectivity of the outer light beam of first wavelength coverage for the reflectivity of the light beam in one first wavelength coverage, the second optical filtering portion of this optical filter is to should the extinction applying area, makes that this illuminating bundle through this second optical filtering portion is projected to this extinction applying area.
5. projection arrangement according to claim 4, wherein the optical wavelength range that penetrates of this second optical filtering portion does not comprise first wavelength coverage, the optical wavelength range that penetrates of this first optical filtering portion comprises this first wavelength coverage.
6. projection arrangement according to claim 5, wherein this first wavelength coverage is the blue light wavelength scope, the optical wavelength range that penetrates of this first optical filtering portion comprises ruddiness, green glow and blue light wavelength scope, and the optical wavelength range that penetrates of this second optical filtering portion comprises ruddiness and green wavelength.
7. projection arrangement according to claim 1, wherein this first optical filtering portion is circular, this second optical filtering portion is an annular, and this second optical filtering portion is around this first optical filtering portion.
8. projection arrangement according to claim 1, wherein this light source comprises a reflex housing, this reflex housing has one first echo area and one second echo area, and the minimal reflection optical wavelength of the reflected light wavelength scope of this second echo area is greater than the minimal reflection optical wavelength of this first echo area wavelength coverage.
9. projection arrangement according to claim 8, wherein the reflected light wavelength scope of this first echo area comprises ruddiness, green glow and blue light wavelength scope, the reflected light wavelength scope of this second echo area comprises ruddiness and green wavelength.
10. projection arrangement according to claim 8, wherein this second echo area is positioned at the cover edge of this reflex housing and around this first echo area.
11. a projection arrangement comprises:
One illuminator comprises a light source, and this light source comprises:
One lamp source is in order to produce an illuminating bundle; And
One reflex housing, in order to reflect this illuminating bundle, this reflex housing has one first echo area and one second echo area, wherein, the minimal reflection optical wavelength of the reflected light wavelength scope of this second echo area is greater than the minimal reflection optical wavelength of this first echo area wavelength coverage, and perhaps the maximum reflection optical wavelength of the reflected light wavelength scope of this second echo area is less than the maximum reflection optical wavelength of this first echo area wavelength coverage; And
One projection module in order to reception this illuminating bundle from this illuminator, and throws an image according to this.
12. projection arrangement according to claim 11, wherein the reflected light wavelength scope of this first echo area comprises ruddiness, green glow and blue light wavelength scope, and the reflected light wavelength scope of this second echo area comprises ruddiness and green wavelength.
13. projection arrangement according to claim 11, wherein this second echo area is positioned at the cover edge of this reflex housing and around this first echo area.
14. projection arrangement according to claim 11, also comprise at least one optical filter, be arranged on the defined light path of this illuminating bundle, this optical filter also has one first optical filtering portion and one second optical filtering portion, and the minimal penetration optical wavelength that penetrates optical wavelength range of this second optical filtering portion is greater than the minimal penetration optical wavelength that penetrates optical wavelength range of this first optical filtering portion.
15. projection arrangement according to claim 14, wherein this projection module comprises a light valve and a projection lens, this light valve is in order to receive this illuminating bundle, and produce an image strip according to this, this projection lens is in order to receive this image strip and to throw this image according to this, and this projection lens comprises an aperture, and this optical filter is positioned at the conjugation position corresponding to this aperture position.
16. projection arrangement according to claim 14, wherein this first optical filtering portion is circular, and this second optical filtering portion is an annular, and this second optical filtering portion is around this first optical filtering portion.
17. projection arrangement according to claim 14, wherein this projection module comprises a light valve and a projection lens, this light valve comprises a digital micro-mirror assembly, this digital micro-mirror assembly comprises that an active zone and is located at an extinction applying area of active zone periphery, and this extinction applying area is higher than the reflectivity of the outer light beam of first wavelength coverage for the reflectivity of the light beam in one first wavelength coverage, system of the second optical filtering portion of this optical filter is to should the extinction applying area, makes that this illuminating bundle system through this second optical filtering portion is projected to this extinction applying area.
18. projection arrangement according to claim 17, wherein the optical wavelength range that penetrates of this second optical filtering portion does not comprise this first wavelength coverage, and the optical wavelength range that penetrates of this first optical filtering portion comprises this first wavelength coverage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100014269A CN101221346A (en) | 2007-01-08 | 2007-01-08 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100014269A CN101221346A (en) | 2007-01-08 | 2007-01-08 | Projection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101221346A true CN101221346A (en) | 2008-07-16 |
Family
ID=39631266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100014269A Pending CN101221346A (en) | 2007-01-08 | 2007-01-08 | Projection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101221346A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010133090A1 (en) * | 2009-05-20 | 2010-11-25 | 绎立锐光科技开发(深圳)有限公司 | Light source and light converting method/apparatus thereof, and application system of the light source |
| CN106200237A (en) * | 2016-09-09 | 2016-12-07 | 合肥鑫晟光电科技有限公司 | Fluorescent wheel and projector |
| CN106842551A (en) * | 2016-12-28 | 2017-06-13 | 深圳市华星光电技术有限公司 | A kind of colour wheel and the time-sequential projector comprising colour wheel |
| CN109212878A (en) * | 2018-09-27 | 2019-01-15 | 明基智能科技（上海）有限公司 | Optical projection system |
| WO2019109504A1 (en) * | 2017-12-06 | 2019-06-13 | 深圳光峰科技股份有限公司 | Projection device |
-
2007
- 2007-01-08 CN CNA2007100014269A patent/CN101221346A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010133090A1 (en) * | 2009-05-20 | 2010-11-25 | 绎立锐光科技开发(深圳)有限公司 | Light source and light converting method/apparatus thereof, and application system of the light source |
| CN101893204B (en) * | 2009-05-20 | 2012-03-07 | 绎立锐光科技开发(深圳)有限公司 | Light source and light conversion method thereof, light converter and application system of light source |
| US9152021B2 (en) | 2009-05-20 | 2015-10-06 | Appotronics Ltd. | Light source, wavelength conversion method, wavelength conversion device, and system for light source |
| CN106200237A (en) * | 2016-09-09 | 2016-12-07 | 合肥鑫晟光电科技有限公司 | Fluorescent wheel and projector |
| US10416441B2 (en) | 2016-09-09 | 2019-09-17 | Technology Group Co., Ltd. | Fluorescent color wheel and projector |
| CN106842551A (en) * | 2016-12-28 | 2017-06-13 | 深圳市华星光电技术有限公司 | A kind of colour wheel and the time-sequential projector comprising colour wheel |
| WO2019109504A1 (en) * | 2017-12-06 | 2019-06-13 | 深圳光峰科技股份有限公司 | Projection device |
| CN109212878A (en) * | 2018-09-27 | 2019-01-15 | 明基智能科技（上海）有限公司 | Optical projection system |
| US11022872B2 (en) | 2018-09-27 | 2021-06-01 | Benq Corporation | Projection system |
| CN109212878B (en) * | 2018-09-27 | 2021-07-27 | 明基智能科技（上海）有限公司 | Projection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1453324A2 (en) | Projection-type display optical system | |
| CN101305310A (en) | Color-splitting optical element and an optical system utilizing the color-splitting optical element | |
| EP1705511A1 (en) | Illuminator for a projector having a coloured wheel and collimating means | |
| US20080062546A1 (en) | Dynamic aperture for a light processing system | |
| WO2017183249A1 (en) | Projection display device | |
| CN101221346A (en) | Projection device | |
| CN101669068A (en) | Projection display | |
| US6799852B2 (en) | Image display projector | |
| CN101788746B (en) | Projector apparatus | |
| US7807958B2 (en) | Switch for an illumination device, and projection system including the same | |
| US7837337B2 (en) | Projection apparatus | |
| KR20130078903A (en) | Optical system for pico projector | |
| US20070279774A1 (en) | Projecting device | |
| US6412954B1 (en) | Dust-proof device for solid integration rod in projecting apparatus | |
| CN110764349B (en) | Projection system | |
| KR100813988B1 (en) | Illumination apparatus and image projection apparatus using the same | |
| CN101191906B (en) | Optical element and projector | |
| CN100443952C (en) | Projection system capable of changing effect of environment on picture dispaly | |
| CN109884843B (en) | Projector with a light source | |
| CN114911120B (en) | Light source module and projection device | |
| JP2008083245A (en) | Image projecting device | |
| EP2114077A3 (en) | Image display apparatus | |
| JP3496014B2 (en) | LCD projector | |
| CN100385287C (en) | Off-axis optical projector | |
| KR100598425B1 (en) | Projection lens system for reflective image |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080716 |