CN101359158A - Projection device - Google Patents
Projection device Download PDFInfo
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- CN101359158A CN101359158A CNA2007101413406A CN200710141340A CN101359158A CN 101359158 A CN101359158 A CN 101359158A CN A2007101413406 A CNA2007101413406 A CN A2007101413406A CN 200710141340 A CN200710141340 A CN 200710141340A CN 101359158 A CN101359158 A CN 101359158A
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Abstract
The invention discloses a projection device; in the projection device, a first light source, a second light source and a third light source respectively provide a first color light, a second color light and a third light. A first digital micro-mirror device is used for receiving and reflecting the first color light, and a second digital micro-mirror device receives and reflects the second color light and the third color light which are guided through a first light guide device; then, a second light guide device projects the color lights from the first digital micro-mirror device and the second digital micro-mirror device.
Description
Technical field
The invention relates to a kind of projection arrangement, especially be applied to two digital micro-mirror devices and be the projection arrangement of light source with the light emitting diode about a kind of.
Background technology
The image documentation equipment that projection arrangement has generally used for office, family and meeting room and other places at present, wherein, digital optical processing projection device (Digital Light Processing, DLP) be the application of a kind of digital projection and display technique, it can accept digital signal, and producing one then is the digital light pulse of row.The DLP technological core be utilize digital micro-mirror device (Digital Micromirror Device, DMD), when ray cast when DMD goes up, go up a plurality of miniature minute surfaces by DMD light reflexed to camera lens and imaging.
When projection arrangement adopts three DMD respectively at three primary colors, though can reach the brightness and the preferable resolution of thousands of lumens,, and must cooperate other optical element just can reach its effect because the unit price of DMD is higher, will significantly increase the cost of product; Otherwise,,, can't reach higher brightness and resolution though projection arrangement can obtain preferable competitive power on cost is considered if consider to reduce the quantity of DMD.Therefore, optical efficiency is good and need not the expensive projection arrangement with two DMD, and just industry institute extensively adopts for this reason.
Existing DLP projection arrangement with two DMD as shown in Figure 1.This projection arrangement 1 mainly comprises a light source 11, a colour wheel 14, a total reflection (total internal reflection, TIR) prism 15, two digital micro-mirror device 16a, 16b, a spectroscope 17 and a projection lens 18, wherein, light source 11 be generally ultrahigh pressure mercury lamp (UltraHigh Pressure Lamp, UHP).Specifically, the light that light source 11 is produced forms primaries via colour wheel 14, enters in the total reflection prism 15; Behind total reflection prism 15, different color light just can be separated by spectroscope 17, and is projected to respectively on two digital micro-mirror device 16a, the 16b.Because ultrahigh pressure mercury lamp is relatively poor in the usefulness performance of ruddiness, can cooperate the optical filtering ratio design of colour wheel 14, improve the ratio of ruddiness; Perhaps, supply with ruddiness continuously with a light source, another light source then switches blue, green glow with colour wheel 14, also is a kind of selection that obtains than the primaries of balance.Then, ruddiness is handled with digital micro-mirror device 16b separately, green glow and blue light be common numbers micro-mirror device 16a then, just can reach the effect of balance primaries.Light is after digital micro-mirror device 16a, 16b reflect respectively, and combination is once again also throwed lens 18 certainly by total reflection prism 15 and penetrated.
Yet in the existing DLP projection arrangement, will there be many shortcomings in light source 11 if adopt ultrahigh pressure mercury lamp.Because ultrahigh pressure mercury lamp needs high voltage to start, under the demand of this high power consumption, must use AC power to be driven, will make circuit more complicated; Ultrahigh pressure mercury lamp is to produce ultraviolet ray by exciting of mercury, and then form high bright light source, it is more of a specified duration to desire to reach the spent time of certain brightness, after the startup, the temperature of bulb is up to Jin Sheshi thousand degree, and postboost heat radiation also need expend long time to finish cooling, so adopt ultrahigh pressure mercury lamp must possess high heat radiation requirement.In addition, adopt ultrahigh pressure mercury lamp to still need and cooperate colour wheel can produce trichromatic light, also have the life-span short, change be difficult for, deficiency, environmental pollution, power consumption reach problem such as take up space to colour gamut.
In sum, the projection arrangement of existing employing two-chip type digital micro-mirror device, ultrahigh pressure mercury lamp, it still has deficiency at aspects such as usefulness performance, heat radiation and demonstration colour gamuts, therefore propose a kind of adopt that efficient is better, colour gamut is wide, size is less, framework is simple and easy and with low cost, and start-up time short two-chip type digital micro-mirror device projection arrangement, just industry is needed badly for this reason.
Summary of the invention
A purpose of the present invention is to provide a kind of projection arrangement, and it adopts the two-chip type digital micro-mirror device, just can realize controlling three primary colors light.
Another object of the present invention is to provide a kind of projection arrangement, it adopts light emitting diode as light source, and this kind light source need not high voltage and just can drive, and light source life is long, maintenance is easy, reaction is quick and power saving.
Another purpose of the present invention is to provide a kind of projection arrangement, and it can highlight, promotes luminescence efficiency and make the luminous flux abundance, and can keep the light continuity and not discovered by naked eyes.
For reaching above-mentioned purpose, projection arrangement of the present invention comprise one first light source, a secondary light source, one the 3rd light source, one first photoconduction leading-in device, one first digital micro-mirror device (digital micromirror device, DMD), one second digital micro-mirror device and one second photoconduction leading-in device.Wherein, first light source is suitable to provide one first coloured light, secondary light source to fit to provide one second coloured light, the 3rd light source to fit so that one the 3rd coloured light to be provided, and the first photoconduction leading-in device is suitable to guide second coloured light and the 3rd coloured light, first digital micro-mirror device is fitted with reception and is reflected first coloured light, second digital micro-mirror device is in order to second coloured light and the 3rd coloured light that receive and reflection has been guided, and the second photoconduction leading-in device is then suitable throwing away from the coloured light of first digital micro-mirror device and second digital micro-mirror device.
For example, projection arrangement of the present invention can comprise a green LED, a red light emitting diodes, a blue LED, one first digital micro-mirror device and one second digital micro-mirror device, wherein, green LED is in order to provide a green glow, red light emitting diodes is in order to provide a ruddiness, and blue LED is in order to provide a blue light; First digital micro-mirror device is in order to reception and reflect green light, and second digital micro-mirror device is in order to receive and reflect red and blue light.Wherein, red light emitting diodes and blue LED are alternately luminous.
Description of drawings
After consulting below in conjunction with the description of accompanying drawing to embodiments of the present invention, affiliated technical field has knows that usually the knowledgeable just can understand purpose of the present invention, and technological means of the present invention and enforcement aspect; Wherein:
Fig. 1 is existing digital optical processing projection device synoptic diagram;
Fig. 2 A is the projection arrangement vertical view of first embodiment of the invention;
Fig. 2 B is the projection arrangement schematic perspective view of first embodiment of the invention;
Fig. 3 A is the projection arrangement upward view of second embodiment of the invention;
Fig. 3 B is the projection arrangement vertical view of second embodiment of the invention; And
Fig. 4 is the heat abstractor synoptic diagram of second embodiment of the invention.
Embodiment
The first embodiment of the present invention provides a kind of projection arrangement, and the vertical view of this projection arrangement 2 and schematic perspective view are respectively shown in Fig. 2 A and Fig. 2 B.Projection arrangement 2 comprises one first light source 201a, a secondary light source 201b, one the 3rd light source 201c, one first light harvesting post 203a, one second light harvesting post 203b and one the 3rd light harvesting post 203c, one first photoconduction leading-in device 205, one first catoptron 207a, one second catoptron 207b, one first prism 209a, one second prism 209b, one first digital micro-mirror device (digital micromirror device, DMD) 211a, one second digital micro-mirror device 211b and one second photoconduction leading-in device 213.
The first light source 201a suitable with provide one first coloured light, secondary light source 201b suitable so that one second coloured light to be provided the 3rd light source 201c suitable so that one the 3rd coloured light to be provided.In this embodiment, the first light source 201a, secondary light source 201b and the 3rd light source 201c are respectively a green LED, a red light emitting diodes and a blue LED, and therefore first coloured light, second coloured light and the 3rd coloured light then are respectively a green glow, a ruddiness and a blue light.
Above-mentioned light emitting diode, can also be provided with respectively a plurality of, forming light emitting diode matrix, this field have know usually that the knowledgeable can think easily and, do not give unnecessary details in addition at this.Present embodiment is that red light emitting diodes and blue LED is alternately luminous with 50% work period (duty cycle), and green LED is for luminous continuously, that is with 100% work period operation.50% work period only is an illustration, in other embodiment, the red work period with blue LED distributes, can adjust on demand, for example, red light emitting diodes can adopt the work period in 40% to 60% scope luminous, and blue LED is then luminous in the work period of red light emitting diodes with corresponding complementary.
The first light harvesting post 203a, the second light harvesting post 203b and the 3rd light harvesting post 203c are adjacent to the first light source 201a, secondary light source 201b and the 3rd light source 201c respectively, to distinguish homogenising and guiding first coloured light, second coloured light and the 3rd coloured light from the first light source 201a, secondary light source 201b and the 3rd light source 201c.
The first photoconduction leading-in device 205 in the projection arrangement 2, suitable with second coloured light and three coloured light of guiding through the second light harvesting post 203b and the 3rd light harvesting post 203c homogenising.Preferably, the first photoconduction leading-in device 205 can be a spectroscope (dichroic mirror).
Specifically, through first coloured light of first light harvesting post 203a outlet, successively inject the first digital micro-mirror device 211a by the first catoptron 207a and the first prism 209a; Second coloured light and the 3rd coloured light through the second light harvesting post 203b and the 3rd light harvesting post 203c outlet, be optionally to be directed to the second catoptron 207b through the first photoconduction leading-in device 205 earlier, successively by this second catoptron 207b, this second prism 209b, inject among the second digital micro-mirror device 211b again.
Hold, the first digital micro-mirror device 211a receives first coloured light, and with its reflection entering once more among the first prism 209a, and the second digital micro-mirror device 211b receives second coloured light and the 3rd coloured light, and it is reflected to enter once more among the second prism 209b.The first prism 209a and the second prism 209b are guided into above-mentioned coloured light in the second photoconduction leading-in device 213 again.Preferably, the first prism 209a and the second prism 209b are all inner full-reflection (totalinternal reflection, TIR) prism.
The second photoconduction leading-in device 213 is suitable to carry out combination with the coloured light that the first prism 209a and the second prism 209b are guided, and image is after combination, and the projection lens group 20 that just can be sent to projection arrangement 2 is to be projected on the screen (scheming not shown).In this embodiment, the second photoconduction leading-in device 213 is preferably a beam splitter (dichroic cube), and for example, this beam splitter can be a Philips prism (Philip prism).
The second embodiment of the present invention also provides a kind of projection arrangement, and its vertical view and upward view are respectively shown in Fig. 3 A and Fig. 3 B.Projection arrangement 3 also comprises a heat abstractor 31 with the loss heat except that all elements that comprise last embodiment.
For cooperating quantity of light source, the heat abstractor 31 of present embodiment can have three heat-conducting plate 311a, 311b, 311c, three heat-conducting units and multi-disc radiating fin (heat sink) 315, and three heat-conducting units described in the present embodiment can be respectively heat pipe (heat pipe) 313a, 313b, 313c.As shown in Figure 4, with the first light source 301a and corresponding heat-conducting plate 311a, multi-disc radiating fin 315 and heat pipe 313a is example, in order effectively to conduct heat, the heat-conducting plate 311a and the first light source 301a hot tie-in, and the two ends of this heat pipe 313a also respectively with heat-conducting plate 311a and 315 hot tie-ins of these radiating fins.Whereby, the heat that just the first light source 301a that is contacted can be imported into heat-conducting plate 311a is directed to radiating fin 315 by heat pipe 313a, to go out to extraneous loss.
Please consult Fig. 3 A, 3B once more, among this embodiment, these light sources 301a～301b is arranged at the same side with projection lens group 20, and respectively this heat pipe 313a, 313b, 313c extend towards the same side, and make radiating fin also be arranged at the same side, in other words, each heat pipe 313a, 313b, 313c extend toward the direction of radiating fin 315.Above-mentioned configuration mode can be saved the volume size of projection arrangement, and can effectively heat dissipation region be separated out with optical region, fits and can avoid heat energy to influence each optical element, and also can increase radiating efficiency effectively because of heat is concentrated to discharge.
With reference to the various embodiments described above as can be known, each light source also is not limited to light emitting diode, and the color of each light emitting diode also is not subjected to restriction above.Be noted that in addition respectively this light source 301a～301c also can be integrated into an assembly (figure does not show) with this heat abstractor 31, and this assembly is removable installed in the projection arrangement 3, the notion that this embodiment is also expressed for desire of the present invention.Only in order to explaination the present invention, existing this operator can spread to other easily and implement aspect for the kind of the optical element of the various embodiments described above, position and quantity.
The digital optical processing projection device of two-chip type of the present invention can adopt light emitting diode as light source, and this kind light source need not high voltage and just can drive, and serviceable life is longer; Owing to can select the precisely light emitting diode of wavelength for use, so have wider gamut range; Start-up time is short, can reach quick startup or closes, make that light source extinguishes after, the stand-by period of shutdown also can significantly shorten, and does not more have the problem of mercury pollution.In addition, can save the setting of colour wheel and other optical element, so can significantly reduce overall dimensions, the simplified system architecture of illuminator, the manufacturing cost of reduction projection arrangement.Therefore, adopt the digital optical processing projection device of two-chip type of framework of the present invention, aspects such as its color demonstration, brightness of image and efficient all can significantly promote.
The above embodiments only are used for exemplifying enforcement aspect of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, the scope of the present invention should be as the criterion with the application's claim scope.
Claims (27)
1. projection arrangement is characterized in that comprising:
One first light source, suitable so that one first coloured light to be provided;
One secondary light source, suitable so that one second coloured light to be provided;
One the 3rd light source, suitable so that one the 3rd coloured light to be provided;
One first photoconduction leading-in device, suitable to guide this second coloured light and the 3rd coloured light;
One first digital micro-mirror device, suitable to receive and to reflect this first coloured light;
One second digital micro-mirror device, it is in order to reception and reflect this second coloured light of having guided and the 3rd coloured light; And
One second photoconduction leading-in device, suitable throwing away from the coloured light of this first digital micro-mirror device and this second digital micro-mirror device.
2. projection arrangement according to claim 1, it is characterized in that also comprising one first prism and one second prism, this first prism is located between this first digital micro-mirror device and this second photoconduction leading-in device, and this second prism is located between this second digital micro-mirror device and this second photoconduction leading-in device.
3. projection arrangement according to claim 2 is characterized in that respectively this first prism and this second prism are inner full-reflection prisms.
4. projection arrangement according to claim 1 is characterized in that this first photoconduction leading-in device is a spectroscope.
5. projection arrangement according to claim 1 is characterized in that this second photoconduction leading-in device is a beam splitter.
6. projection arrangement according to claim 1, it is characterized in that also comprising one first light harvesting post, one second light harvesting post and one the 3rd light harvesting post, they are adjacent to this first light source, this secondary light source and the 3rd light source respectively, with first coloured light, second coloured light and three coloured light of difference homogenising from this first light source, this secondary light source and the 3rd light source.
7. projection arrangement according to claim 1 is characterized in that respectively this second coloured light and the 3rd coloured light, is alternately luminous with a work period of 40% to 60%.
8. projection arrangement according to claim 1 is characterized in that comprising a heat abstractor in addition, and it has:
One heat-conducting plate, one of them contacts at least with these light sources;
At least one radiating fin; And
One heat-conducting unit connects this heat-conducting plate and this at least one radiating fin;
Whereby, the heat that this light source is reached this heat-conducting plate is directed to this at least one radiating fin.
9. projection arrangement according to claim 1 is characterized in that comprising a heat abstractor in addition, and it has:
Three heat-conducting plates contact with these light sources respectively;
A plurality of radiating fins; And
Three heat-conducting units connect these heat-conducting plates and these radiating fins respectively;
Whereby, the heat that these light sources is reached these heat-conducting plates is directed to these radiating fins.
10. projection arrangement according to claim 9 is characterized in that these radiating fins are to be arranged at the same side, and respectively this heat-conducting unit then extends toward these radiating fins, and with these radiating fin hot tie-ins.
11. according to Claim 8 or 9 described projection arrangements, it is characterized in that respectively this heat-conducting plate is a copper sheet.
12. according to Claim 8 or 9 described projection arrangements, it is characterized in that respectively this heat-conducting unit is a heat pipe.
13. according to Claim 8 or 9 described projection arrangements, it is characterized in that respectively this radiating fin is made by copper sheet or aluminium flake.
14. a projection arrangement is characterized in that comprising:
One green LED is in order to provide a green glow;
One red light emitting diodes is in order to provide a ruddiness;
One blue LED is in order to provide a blue light;
One first digital micro-mirror device, it is in order to reception and reflect this green glow; And
One second digital micro-mirror device, it is in order to reception and reflect this ruddiness and this blue light;
Wherein, this red light emitting diodes and this blue LED are alternately luminous.
15. projection arrangement according to claim 14, it is characterized in that also comprising one first prism and one second prism, this first prism guiding also makes this first digital micro-mirror device receive this green glow, and this second prism guiding also makes this second digital micro-mirror device receive this ruddiness and this blue light.
16. projection arrangement according to claim 15 is characterized in that respectively this first prism and this second prism are inner full-reflection prisms.
17. projection arrangement according to claim 15, it is characterized in that also comprising a beam splitter, this ruddiness and this blue light that this green glow that this first digital micro-mirror device is reflected and this second digital micro-mirror device are reflected are directed to this beam splitter by this first prism and this second prism respectively, throw away then.
18. projection arrangement according to claim 14, it is characterized in that also comprising one first light harvesting post, one second light harvesting post and one the 3rd light harvesting post, they are adjacent to this green LED, this red light emitting diodes and this blue LED respectively, with this green glow of difference homogenising, this ruddiness and this blue light.
19. projection arrangement according to claim 18 is characterized in that also comprising a spectroscope, in order to guide from the ruddiness of this second light harvesting post and the blue light of the 3rd light harvesting post.
20. projection arrangement according to claim 14 is characterized in that respectively this red light emitting diodes and blue LED are alternately luminous with 40% to 60% work period.
21. projection arrangement according to claim 14 is characterized in that comprising a heat abstractor in addition, it has:
One heat-conducting plate, one of them contacts at least with these light emitting diodes for it;
At least one radiating fin; And
One heat-conducting unit connects this heat-conducting plate and this at least one radiating fin;
Whereby, the heat that this light emitting diode is reached this heat-conducting plate is directed to this at least one radiating fin.
22. projection arrangement according to claim 14 is characterized in that comprising a heat abstractor in addition, it has:
Three heat-conducting plates, it contacts with these light emitting diodes respectively;
A plurality of radiating fins; And
Three heat-conducting units, it connects these heat-conducting plates and these radiating fins respectively;
Whereby, the heat that these light emitting diodes is reached these heat-conducting plates is directed to these radiating fins.
23. projection arrangement according to claim 22 is characterized in that these radiating fins are to be arranged at the same side, respectively this heat-conducting unit then toward these radiating fins extend and with these radiating fin hot tie-ins.
24., it is characterized in that respectively this heat-conducting plate is a copper sheet according to claim 21 or 22 described projection arrangements.
25., it is characterized in that respectively this heat-conducting unit is a heat pipe according to claim 21 or 22 described projection arrangements.
26., it is characterized in that respectively this radiating fin is made by aluminium flake according to claim 21 or 22 described projection arrangements.
27., it is characterized in that this heat abstractor is once the assembly of integrating, and this assembly is to be removable installed in this projection arrangement according to claim 21 or 22 described projection arrangements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101413406A CN101359158B (en) | 2007-08-01 | 2007-08-01 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101413406A CN101359158B (en) | 2007-08-01 | 2007-08-01 | Projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101359158A true CN101359158A (en) | 2009-02-04 |
| CN101359158B CN101359158B (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101413406A Active CN101359158B (en) | 2007-08-01 | 2007-08-01 | Projection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101359158B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986199A (en) * | 2010-07-19 | 2011-03-16 | 深圳雅图数字视频技术有限公司 | Heat pipe cooling system for liquid crystal on silicon (LCOS) projector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996138A (en) * | 2005-12-29 | 2007-07-11 | 普立尔科技股份有限公司 | Portable projector and light source module thereof |
-
2007
- 2007-08-01 CN CN2007101413406A patent/CN101359158B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986199A (en) * | 2010-07-19 | 2011-03-16 | 深圳雅图数字视频技术有限公司 | Heat pipe cooling system for liquid crystal on silicon (LCOS) projector |
| CN101986199B (en) * | 2010-07-19 | 2012-09-26 | 深圳雅图数字视频技术有限公司 | Heat pipe cooling system for liquid crystal on silicon (LCOS) projector |
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| Publication number | Publication date |
|---|---|
| CN101359158B (en) | 2010-09-01 |
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