CN101749566A - Semiconductor lighting device and micro projection optical engine using same - Google Patents
Semiconductor lighting device and micro projection optical engine using same Download PDFInfo
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- CN101749566A CN101749566A CN200810218349A CN200810218349A CN101749566A CN 101749566 A CN101749566 A CN 101749566A CN 200810218349 A CN200810218349 A CN 200810218349A CN 200810218349 A CN200810218349 A CN 200810218349A CN 101749566 A CN101749566 A CN 101749566A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 72
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000005286 illumination Methods 0.000 claims description 38
- 239000004973 liquid crystal related substance Substances 0.000 claims description 32
- 230000011514 reflex Effects 0.000 claims description 26
- 238000004020 luminiscence type Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 238000004581 coalescence Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003086 colorant Substances 0.000 description 5
- 230000010287 polarization Effects 0.000 description 4
- 238000012938 design process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004456 color vision Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
The invention discloses a semiconductor lighting device which comprises a light emitting element, a pyramidal reflector and a condenser lens group, wherein the pyramidal reflector covers the semiconductor light emitting element and is used for directly projecting or reflecting light emitted by the semiconductor light emitting element. The pyramidal reflector is hollow and is provided with a flat or curve inner wall, and the flat inner wall or the curve inner wall is plated with a reflecting film. The condenser lens group is arranged on the output light path of the pyramidal reflector and used for converging and shaping received light. By the pyramidal reflector and the condenser lens group, the semiconductor lighting device can output light beams with good uniformity, has the advantages of simple structure, lower production process and is suitable for production in bulk; in addition, the invention also provides a micro projection optical engine using the same.
Description
Technical field
The present invention relates to lighting source and projection display technique, relate in particular to a kind of semiconductor illumination device and use the micro-optical engine of this lighting device.
Background technology
Semiconductor light-emitting elements, for example: (Light Emitting Diode LED) is a kind of gallium phosphide (GAP), gallium nitride semi-conducting material luminescent devices that make, that can directly electric energy be converted into luminous energy such as (GAN) to light emitting diode.When its inside had certain electric current to pass through, it will be luminous.Because characteristics such as Toxic matter are grown, are quick on the draw, are not contained to LED luminous efficiency height, life-span, make its application more and more widely, especially white light LEDs, be considered to continue incandescent lamp, the later third generation lighting source of fluorescent lamp are widely used in liquid crystal projection apparatus, mobile phone backlight, display screen etc.
Publication number in the Chinese invention patent ublic specification of application " CN1643703 " name is called " system that is used to collect and evenly transmit LED light " and discloses a kind of being used for and collect and the device of the light that transmission LED sends with nearly evenly post.Such LED has bottom, light-emitting component and is installed on the bottom and the dome transparent plastic housing of covering luminous element.This light-emitting device comprise around this LED bottom, be used to collect conic reflector from the sideband light of LED light-emitting component emission, and relative with the LED housing and be used to focus on direct projection and catoptrical lens from LED with this housing branch is arranged.Wherein, conic reflector comprises coarse inner surface, is used for the light that scattering is transmitted.Lens are provided with the flat spot that makes lens projects become the field of nearly evenly light in its surperficial center, and the curved surface of these lens is oval.Yet, the light supply apparatus of this structure, technological requirement is higher, makes more complicated, cost is higher, and, after the light that reflects by this conic reflector projects on the screen, bright in the middle of forming easily, the non-uniform phenomenon that the edge is darker can't satisfy high-quality projection demand.
Summary of the invention
In view of this, must provide a kind of simple in structure, technological requirement is lower, the semiconductor illumination device that uniformity is higher.
In addition, also need provide a kind of simple in structure, brightness is even, the micro projection optical engine that size is little.
A kind of semiconductor illumination device comprises semiconductor light-emitting elements, pyramidal reflex device and collector lens group.Wherein, the pyramidal reflex device covers described semiconductor light-emitting elements, is used for direct projection or reflects the light that described semiconductor light-emitting elements sends.Described pyramidal reflex device hollow, its inwall is plane or curved surface, is coated with reflectance coating on described plane or the curved surface.The collector lens group is arranged on the described pyramidal reflex device output light path, and being used for can the received light of coalescence shaping.
A kind of micro projection optical engine comprises polarizing beam splitter, little liquid crystal display, projecting lens and above-mentioned semiconductor illumination device.Polarizing beam splitter is arranged on the output light path of described semiconductor illumination device, is used for the light that receives is converted into polarised light.Liquid crystal display is used for received polarised light is modulated, and is converted to another polarised light vertical with this polarised light, and makes this another polarised light carry image information.Projecting lens is used to receive and throw another polarised light that carries image information.
The light that semiconductor illumination device of the present invention, semiconductor light-emitting elements send, by the reflection of pyramidal reflex device and the convergence and the shaping of collector lens group, the light beam that output uniformity is good, simple in structure, manufacture craft is lower, is fit to produce in enormous quantities.In addition, use the micro projection optical engine of above-mentioned semiconductor illumination device, its optical system design process only relates to semiconductor illumination device, polarizing beam splitter, little liquid crystal display and projecting lens do not relate to other optics, and be simple in structure, brightness is even, and size is little, and production cost is lower.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the perspective view of the semiconductor illumination device of an embodiment of the present invention;
Fig. 2 is the structural representation of first embodiment of the semiconductor light-emitting elements of Fig. 1;
Fig. 3 is the structural representation of second embodiment of the semiconductor light-emitting elements of Fig. 1;
Fig. 4 is the structural representation of the 3rd embodiment of the semiconductor light-emitting elements of Fig. 1;
Fig. 5 is the perspective view of the pyramidal reflex device of Fig. 1;
Fig. 6 is the perspective view of the micro projection optical engine of first embodiment of the invention;
Fig. 7 is the planar structure schematic diagram of the micro projection optical engine of second embodiment of the invention.
The specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Figure 1 shows that the perspective view of semiconductor illumination device of the present invention, it comprises semiconductor light-emitting elements 20, pyramidal reflex device 30, collector lens group 40 and hollow collector lens group 50.Wherein, pyramidal reflex device 30 covers semiconductor light-emitting elements 20, is used for the light that direct projection or reflective semiconductor light-emitting component 20 are sent.Collector lens group 40 is arranged on pyramidal reflex device 30 output light paths, and being used for can the received light of coalescence shaping.Hollow collector lens group 50 is arranged on collector lens group 40 output light paths, is used to receive the light that collector lens group 40 is sent, and edge light is done optically focused handle.
In the embodiment of the present invention, semiconductor light-emitting elements 20 is that (Light EmittingDiode, LED) chip are used to send 180 ° light to light emitting diode.In the present embodiment, the light of three kinds of different colours of semiconductor light-emitting elements 20 sequential emission, for example: ruddiness, blue light and green glow.Consult Fig. 2, this semiconductor light-emitting elements 20 is four luminescence chips of square arrangement: green luminescence chip G1, the G2 of the outgoing green glow of the blue light emitting chip B of the red light-emitting chip R of an outgoing ruddiness, an outgoing blue light and two diagonal angle layouts.And red light-emitting chip R, green luminescence chip G1, G2 and blue light emitting chip B all are connected with the controller (not shown), and the sequential that is used for control chip is luminous.Each working frequency of chip is set by the required illumination parameter of liquid crystal panel, shows best colour vision effect to reach.
Consult Fig. 3 and Fig. 4, semiconductor light-emitting elements 20 also can be triangular arrangement or three luminescence chips of linear array: the green luminescence chip G of the blue light emitting chip B of the red light-emitting chip R of an outgoing ruddiness, an outgoing blue light and an outgoing green glow.
In other embodiment of the present invention, semiconductor light-emitting elements 20 also can adopt laser chip to replace led chip.Secondly, the quantity of semiconductor light-emitting elements 20 also can be for more than three or four above luminescence chips, also can be arranged to other form, as long as satisfy the light send redness, blueness and these three kinds of different colours of green, and the luminous energy of these three kinds of different colours is mixed into white light and gets final product.Certainly, this semiconductor light-emitting elements 20 also can comprise blue-light LED chip and be used to absorb a part of light that blue-light LED chip sends and the rare earth luminescent material (fluorescent material) that converts long wavelength light to.Fluorescent material is subjected to the excitation of the blue light that blue-light LED chip sends, and converts the light of Yellow series to, and the blue light that sees through fluorescent material with another part is combined into white light.
Consult Fig. 5, pyramidal reflex device 30 is a hollow structure, and its inwall 31 is a curved surface, is coated with the reflectance coating (not shown) on the curved surface.In the embodiment of the present invention, be the projection face, adopt the structure of projection face, increase the reflection of light angle, help raising and project uniformity of light on the screen.Again, the vertical plane radius of pyramidal reflex device 30 is 20 millimeters～26 millimeters, that is, the mullion radius surface R scope of projection face is 20 millimeters～26 millimeters, as: 20 millimeters, 23 millimeters or 26 millimeters etc.In addition, pyramidal reflex device 30 is formed by four lens bondings, that is, formed by four projection face lens bondings.The structure of the projection face lens that distribute relatively in four projection face lens is identical, helps the processing and fabricating of pyramidal reflex device 30.
In other embodiment of the present invention, the inwall of pyramidal reflex device 30 also can be sphere, is promptly formed by four spherical lens bondings, and wherein, the structure of the spherical lens that distributes is identical relatively.Simultaneously, be coated with reflectance coating on the sphere, and the vertical plane radius of sphere also is 20 millimeters～26 millimeters.Certainly, the inwall of pyramidal reflex device can also be the plane, repeats no more here.
In other embodiment of the present invention, the quantity of positive lens also can be one, perhaps more than two.Again, according to the demand of lighting device light path design, selected lens are not limited to the positive lens in this specific embodiment in the collector lens group 40, and it also can be negative lens or balsaming lens.That is, collector lens group 40 is the combination of positive lens, balsaming lens, the perhaps combination of negative lens and balsaming lens, the perhaps combination of positive lens, negative lens, perhaps combination of positive lens, negative lens, balsaming lens etc.Adopt the positive lens of different materials and the structure of the synthetic collector lens group of negative lens group, help color difference eliminating and spherical aberration.
Therefore, semiconductor illumination device of the present invention, the light that the three primary colors semiconductor light-emitting elements sends, behind the curved surface or the reflection on plane of part light by pyramidal reflex device 30, refraction by collector lens group 40, be mixed into a branch of uniform light with part from the light of pyramidal reflex device 30 direct projections, compare the lighting device of traditional three primary colors by the synthetic a branch of light of light-combining prism, light path is shorter, size is less, simultaneously, on projection screen, can obtain the even brightness white light, satisfy microminiaturized, high-quality demand.And for the lighting device that semiconductor light-emitting elements is blue-light LED chip and fluorescent material,, can improve the efficiency of light energy utilization in the light reflected back device that leaks originally outside device by the plane or the curved surface of pyramidal reflex device 30.
Hollow collector lens group 50 is a frame structure, it comprises at least one hollow collector lens, and each hollow collector lens includes the hollow bulb 51 of the most of light that is used for the direct projection incident light and is used to make the refraction part 52 of the edge light of incident light towards the refraction of hollow bulb 51 directions.In the embodiment of the present invention, the hollow collector lens is the rectangle hollow frame, and its quantity is one.The efficient that light is exported is not lost in the directly outgoing from hollow bulb 51 of most of light, and edge light more can effectively improve the utilization rate of luminous energy then by the refraction of refraction part 52.
In other embodiment of the present invention, the quantity of hollow collector lens also can be for a plurality of, its framework also is not limited to rectangular box, certainly, in order further to improve the uniformity of lighting device, make the brightness that projects on the screen even, this hollow collector lens also can omit, and promptly omits hollow collector lens group 50.
Therefore, the light that semiconductor light-emitting elements 20 of the present invention sends, by the reflection of pyramidal reflex device 30 and the convergence and the shaping of collector lens group 40, the light beam that output uniformity is good, simple in structure, manufacture craft is lower, is fit to produce in enormous quantities.
Figure 6 shows that the perspective view of the micro projection optical engine of first embodiment of the invention.This micro projection optical engine comprises semiconductor illumination device, polarizing beam splitter 60, little liquid crystal display 70 and projecting lens (not shown).Wherein, semiconductor illumination device is the semiconductor illumination device of above-mentioned arbitrary embodiment.In the embodiment of the present invention, semiconductor illumination device output non-polarized light.
Polarizing beam splitter 60 is arranged on the output light path of semiconductor illumination device, is used for the light that receives, and promptly non-polarized light is converted into polarised light.In the embodiment of the present invention, polarizing beam splitter 60 is a cube shaped, form by two triangular prism gummeds, be coated with the polarization spectro rete therebetween on the contact-making surface, form a polarization light-dividing surface by this polarization spectro rete, this polarization light-dividing surface can be converted to non-polarized light polarised light and isolate the S polarised light and the P polarised light.Certainly, polarizing beam splitter 60 also can be formed or flat polarizing beam splitter by other prism gummed, is converted into the polarised light outgoing as long as satisfy the light of incident.
Little liquid crystal display 70 is used for received polarised light is modulated, and is converted to another polarised light vertical with this polarised light, and makes this another polarised light carry image information.In the present embodiment, little liquid crystal display is the single chip liquid crystal panel, is arranged at a non-adjacent side of polarizing beam splitter 60 and semiconductor illumination device.When the polarised light that receives when little liquid crystal display 70 is the P polarised light,, will be converted to the S polarised light that carries image information, and reflexes to polarizing beam splitter 60 through after the modulation of little liquid crystal display.
In other embodiment of the present invention, these little liquid crystal display 70 received polarised lights also can be the S polarised light, through after the modulation of little liquid crystal display 70, are converted to the P polarised light that carries image information, and reflex to polarizing beam splitter 60.
When the polarised light that receives when little liquid crystal display 70 is the P polarised light, projecting lens and little liquid crystal display 70 adjacent sides that are arranged at polarizing beam splitter 60, in other words, projecting lens and little liquid crystal display 70 are arranged at respectively on the adjacent two sides of polarizing beam splitter 60.At this moment, projecting lens is to be used to receive and throw the S polarised light that carries image information.And the polarised light that receives when little liquid crystal display 70 is when being the S polarised light, and this projecting lens and little liquid crystal display 70 opposing parallel are arranged at a side of polarizing beam splitter 60, are used to receive and throw another polarised light that carries image information, i.e. the P polarised light.
In the embodiment of the present invention, little liquid crystal display is the LCOS liquid crystal panel.
Figure 7 shows that the planar structure schematic diagram of the micro projection optical engine of second embodiment of the invention.The structure of this micro projection optical engine and micro projection optical engine shown in Figure 6 is basic identical, and difference is that little liquid crystal display shown in Figure 7 is the two-piece type liquid crystal panel, is arranged at respectively on the adjacent two sides of polarizing beam splitter 60 '.Semiconductor illumination device is launched uniform light and be divided into two bundle polarised lights behind polarizing beam splitter 60 ': S polarised light, P polarised light offer liquid crystal panel 71,72 respectively.Two liquid crystal panel output image light synthesize a branch of light again behind polarizing beam splitter 60 ', output to external screen from projection lens.
Therefore, in the micro projection optical engine of the present invention, lighting device sends the uniform light of brightness after the polarizing beam splitter beam split, offer little liquid crystal display, afterwards, little liquid crystal display modulates image light and enters polarizing beam splitter once more, outputs to external screen by polarizing beam splitter from projection lens, and its optical system design process only relates to semiconductor illumination device, polarizing beam splitter, little liquid crystal display and projecting lens, do not relate to other optics, simple in structure, good uniformity, efficiency of light energy utilization height, and size is little, and production cost is lower.
The specific embodiment of the above is a better embodiment of the present invention, is not to limit concrete practical range of the present invention with this, and scope of the present invention comprises and is not limited to this specific embodiment.The equivalence variation that all shapes according to the present invention, structure are done all comprises in protection scope of the present invention.
Claims (15)
1. semiconductor illumination device comprises:
Semiconductor light-emitting elements;
It is characterized in that described semiconductor illumination device also comprises:
The pyramidal reflex device covers described semiconductor light-emitting elements, and be used for direct projection or reflect the light that described semiconductor light-emitting elements sends, described pyramidal reflex device hollow, its inwall is plane or curved surface, is coated with reflectance coating on described plane or the curved surface; And
The collector lens group is arranged on the described pyramidal reflex device output light path, and being used for can the received light of coalescence shaping.
2. semiconductor illumination device according to claim 1 is characterized in that, described pyramidal reflex device is formed by four lens bondings.
3. semiconductor illumination device according to claim 2 is characterized in that, the structure of the lens that distribute relatively in described four lens is identical.
4. semiconductor illumination device according to claim 2 is characterized in that, described lens are projection face lens or spherical lens.
5. semiconductor illumination device according to claim 4 is characterized in that, the vertical plane radius of described projection face or sphere is 20 millimeters～26 millimeters.
6. according to any described semiconductor illumination device of claim 1 to 5, it is characterized in that described collector lens group is one or at least two tactic lens.
7. according to any described semiconductor illumination device of claim 1 to 5, it is characterized in that, described semiconductor illumination device also comprises hollow collector lens group, be arranged on the described collector lens group output light path, be used to receive the light that this collector lens group is sent, and edge light done optically focused handle.
8. semiconductor illumination device according to claim 7, it is characterized in that, described hollow collector lens group is a frame structure, it comprises at least one hollow collector lens, and each hollow collector lens includes the hollow bulb of the most of light that is used for the direct projection incident light and is used to make the refraction part of the edge light of incident light towards the refraction of hollow bulb direction.
9. according to any described semiconductor illumination device of claim 1 to 5, it is characterized in that described semiconductor light-emitting elements is light-emitting diode chip for backlight unit or laser chip.
10. according to the described semiconductor illumination device of claim 1 to 5, it is characterized in that described semiconductor light-emitting elements comprises triangular arrangement or linearly aligned at least three luminescence chips: at least one red light-emitting chip, at least one blue light emitting chip and at least one green luminescence chip.
11. according to the described semiconductor illumination device of claim 1 to 5, it is characterized in that described semiconductor light-emitting elements is at least four luminescence chips of square arrangement: at least one red light-emitting chip, at least one blue light emitting chip and at least two green luminescence chips that the diagonal angle is arranged.
12. according to any described semiconductor illumination device of claim 1 to 5, it is characterized in that, it is characterized in that described semiconductor light-emitting elements comprises blue LED chip and is used to absorb a part of light that described blue LED chip sends and the fluorescent material that converts long wavelength light to.
13. a micro projection optical engine comprises:
Polarizing beam splitter is used for the light that receives is converted into polarised light;
Little liquid crystal display is used for received polarised light is modulated, and is converted to another polarised light vertical with this polarised light, and makes this another polarised light carry image information;
Projecting lens is used to receive and throw another polarised light that carries image information;
It is characterized in that described micro projection optical engine comprises that also described polarizing beam splitter is arranged on the output light path of described semiconductor illumination device according to any described semiconductor illumination device in the claim 1 to 12.
14. a kind of micro projection optical engine according to claim 13 is characterized in that, described little liquid crystal display is the single chip liquid crystal panel, is arranged at a non-adjacent side of described polarizing beam splitter and semiconductor illumination device.
15. a kind of micro projection optical engine according to claim 13 is characterized in that, described little liquid crystal display is two liquid crystal panels, is arranged at respectively on the adjacent two sides of described polarizing beam splitter.
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| CN200810218349A CN101749566A (en) | 2008-12-12 | 2008-12-12 | Semiconductor lighting device and micro projection optical engine using same |
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| CN200810218349A CN101749566A (en) | 2008-12-12 | 2008-12-12 | Semiconductor lighting device and micro projection optical engine using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434788A (en) * | 2010-09-29 | 2012-05-02 | 亿广科技(上海)有限公司 | Light source assembly |
| CN102691892A (en) * | 2011-03-22 | 2012-09-26 | 李姝江 | LED illumination light source |
| CN114721209A (en) * | 2022-04-27 | 2022-07-08 | 业成科技（成都）有限公司 | Projection display device |
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| CN1362632A (en) * | 2000-12-28 | 2002-08-07 | Lg电子株式会社 | Image projector |
| CN1643703A (en) * | 2002-09-09 | 2005-07-20 | 应用创新技术公司 | LED light collection and uniform transmission system |
| CN1645250A (en) * | 2004-12-07 | 2005-07-27 | 成都泰阳视讯技术有限公司 | Single-chip microdisplay projecting optical engine and projector of time division three-color LED light |
| CN200969018Y (en) * | 2006-08-22 | 2007-10-31 | 上海力保科技有限公司 | Reflected LCD panel projection optical-mechanical system |
| CN101261427A (en) * | 2007-03-09 | 2008-09-10 | 上海飞锐光电科技有限公司 | Double LCD plate projection display system |
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| JPH08262572A (en) * | 1995-03-22 | 1996-10-11 | Japan Aviation Electron Ind Ltd | Condensing light source device and projector using this light source device |
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| CN102434788A (en) * | 2010-09-29 | 2012-05-02 | 亿广科技(上海)有限公司 | Light source assembly |
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Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Applicant after: BUTTERFLY TECHNOLOGY (SHENZHEN) Ltd. Address before: 518055, 301, two, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Applicant before: BUTTERFLY TECHNOLOGY (SHENZHEN) Ltd. |
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Application publication date: 20100623 |