CN101191984A - LEDLight source for LED projection display and projection device using same - Google Patents
LEDLight source for LED projection display and projection device using same Download PDFInfo
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- CN101191984A CN101191984A CNA2006101403310A CN200610140331A CN101191984A CN 101191984 A CN101191984 A CN 101191984A CN A2006101403310 A CNA2006101403310 A CN A2006101403310A CN 200610140331 A CN200610140331 A CN 200610140331A CN 101191984 A CN101191984 A CN 101191984A
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- light source
- led
- projection display
- base seat
- display light
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Abstract
The present invention discloses a light source for LED projection display, comprising three LED luminescent chip arrays in different fundamental colors, as well as base seats fixing the arrays, and at least one of the surfaces of the chip arrays or the base seats are provided with a reflection structure for forming a light recycling device. The reflection structure can be an optical plating layer. The surfaces of the luminescent chips are plated with a plurality of interference optical film layers, and the interference optical film layers are characterized in high penetration to the emission spectra wave band of the luminescent chips as well as high reflection to remaining wave band. The surfaces of the base seats exposed among the luminescent chips are plated with a film layer having high reflection characteristic to the whole visible wave band. The optical film layers can reflect back the light reflected from an optical system for reutilization, which can improve the optical efficiency of the system. The present invention also discloses a projection device adopting the light source.
Description
Technical field
A kind of LED of relate generally to of the present invention (light emitting diode) solid light source is in particular to a kind of LED solid light source that is mainly used in Projection Display.
Background technology
Along with micro-display devices such as LCoS, DMD occur, Projection Display has become a kind of important novel display mode.Lighting source in existing projection display system mainly is to adopt UHP lamp (ultrahigh pressure mercury lamp), xenon lamp etc., but shortcoming such as these light sources all have that volume is big, power consumption is high, heating is serious, oxious component (ultraviolet light, infrared light) is more in the spectrum, the life-span lacks, security is relatively poor.Therefore,, replace UHP or xenon lamp has been this important research direction in several years as Projection Display with light source, had some breadboard model machines to come out already with LED in recent years along with the rapid raising of solid light source LED (light emitting diode) technology.
With present technology, the needs that the brightness of single LEDs still can not Projection Display.Must adopt the LED array of the such three kinds of primary colours of many red, green, blues of similar Fig. 1, structure is formed a Projection Display light source.The such light source and the colored LCoS device (seeing the Chinese patent application No.200610083624.X that is entitled as " portable electric appts ") of invention are recently combined the projection display system that can form a microminiaturization.This microminiaturization projection display system can be integrated in the portable electric appts such as mobile phone, notebook computer, PDA, palm-type game machine, has broad application prospects.
Application in portable electric appts is subjected to the restriction of battery capacity, is extremely important to making full use of of luminous energy.And the light that matches with colored LCoS device is at present recycled design, and is mainly at approximate pointolite system, just not too suitable for the LED array of approaching face light source more.
Therefore, need a kind of light to recycle (being the light reuse) method at the LED array light source.
Summary of the invention
The invention discloses a kind of Projection Display with light source and the projection arrangement that adopts this light source.Projection Display of the present invention comprises LED luminescence chip array and fixes the base seat of this array with light source, and at least one surface has reflection configuration to constitute the light reclamation set in chip array and the base seat.Reflection configuration can be the optical coating layer.For example, all plate the multilayer optical film structure on the surface of each LED luminescence chip, the spectrum height that this membrane structure has the emission of this luminescence chip sees through, and to the feature of the high reflection of visible light of other wave band; And/or on the surface of the base seat of fixing these LED luminescence chips, (remove by these luminescence chips and cover residence) and plate the full wave highly reflecting films layer of visible light.Like this, this led light source just is equivalent to a catoptron, its light of directive reflected back optics system to greatest extent can be reused again.
Be applied to colored LCoS projection display system, this LED Projection Display that has the light reclamation set can be with the useless light of other element reflects light echo origin systems from colored LCoS or projection display system with light source, the reflected back optical projection system is made projection usefulness once more, thereby can improve the light-use of system greatly.
Description of drawings
Fig. 1 illustrates the floor map of existing Projection Display with led light source;
Fig. 2 illustrates the diagrammatic cross-section of Projection Display of the present invention with led light source;
Fig. 3 illustrates the transmitted spectrum of the optical film on each LED luminescence chip;
Fig. 4 illustrates the embodiment that led light source according to the present invention is used for colored LCoS projection display system;
Fig. 5 illustrates another embodiment that led light source according to the present invention is used for colored LCoS projection display system;
Fig. 6 illustrates the led light source synoptic diagram of curved surface base seat.
Embodiment
Below with reference to the description of drawings specific embodiments of the invention.
Fig. 1 illustrates the floor map of a kind of existing Projection Display with led light source.Because the luminance shortage of single LEDs luminescence chip to be satisfying the needs of Projection Display, thereby can only adopt the mode of plurality of LEDs combination to reach this purpose.On the figure illustration be fixed on the base seat 1 by certain arrangement with 12 LEDs luminescence chips (ruddiness 2-1, green glow 2-2 and blue light 2-3 each four), the light of their emissions becomes the white light of a branch of intimate collimation behind homogenizing and collimation, can be used for Projection Display.Must reserve certain spacing distance between these luminescence chips, good with the heat radiation that guarantees them.
Fig. 2 illustrates the diagrammatic cross-section of Projection Display of the present invention with led light source.LED luminescence chip 2 is inlayed and is fixed on the base seat 1.Consider the reuse of light, thereby can take inserted fixed form that the surface that makes the surface of luminescence chip and base seat in same plane, also can be convenient to the location of chip simultaneously basically.In order to realize the light reuse, have reflection configuration at least one the surface in chip 2 and the base seat 1.For example, on the surface of luminescence chip, be coated with multilayer optical interference film 3, they are multilayer film that the high and low refractive index by full medium replaces, and it is characterized in that having high permeability for the spectrum of corresponding luminescence chip emission, then have high reflectance for other spectrum of visible light wave range.Its transmitted spectrum can be as shown in Figure 3, and curve 101 is corresponding to the transmitance of the optical film on the emitting red light chip, and curve 102,103 then corresponds respectively to green and blue luminescence chip.It is noted that these curves only are examples, actual optical transmission spectra needs to adjust according to the characteristic spectral emission of the luminescence chip of correspondence.Available high refractive index medium material includes but not limited to: TiO
2, ZrO
2, ZnS, HfO
2, Ta
2O
5, Nb
2O
5Deng, and available low refractive index dielectric material includes but not limited to: SiO
2, MgF
2, LiF, ThF
4, cryolite etc.On the surface of base seat 1, (remove the zone that is covered by luminescence chip 2) and then be coated with the reflective coating 4 that the visible light all band is all had high reflectance, this rete can be the metallic diaphragm of tool high reflectance, as: aluminium, silver, rhodium etc., also can be the broadband reflection film of full medium, or the combined films of metal and medium system.About describing in further detail of these optical thin films, can be referring to Tang Jinfa, Zheng Quanzhu " applied film optics ".For the reflection that makes these optical films is direct reflection basically, the surface that requires luminescence chip and base seat is to approach optical mirror plane.Therefore, before being coated with these bloomings, must carry out planarizing process to these surfaces.Surfacing means commonly used include, but are not limited to: chemically mechanical polishing (CMP), grinding, mold pressing, replica, pure mechanical buffing, collosol and gel gravity flow equality etc.Certainly, above-mentioned rete 3 can be an individualism with rete 4, but there is the effect that can make the present invention obtain the best simultaneously in the two.
These luminescence chips, base seat and optical film are combined and are constituted the LED Projection Display light source 10 that has the light reclamation set of the present invention.Certainly also should comprise packaged glass, line related etc.,, omit here, not be described in detail, also not draw in the drawings because of little with relation of the present invention.
Fig. 4 illustrates the embodiment that led light source according to the present invention is used for colored LCoS projection display system.Wedge type optical wand 12 wherein can be a barred body that transparent material is made, and wall is coated with highly reflecting films around it, or plated film and directly utilize the total reflection principle of material and air interface not, and described transparent material is glass, plastics, resin etc. for example; Optical wand 12 also can be a hollow passage, and wall is coated with the highly reflecting films layer around it.Its effect mainly is to utilize the repeatedly reflection of its perisporium to light, the effect that can play homogenizing to the intensity and the color of light beam; In addition, because the taper structure that going into of it is young, outlet is big can play the effect of part collimation to divergent beams.When the light that sends by led light source 10 of the present invention behind the repeatedly reflection homogenizing of this wedge type optical wand 12 and part collimation, form a shape, the size all with the similar white hot spot of colored LCoS device 20 significant surfaces, the polarizer 13 is crossed in s polarized component transmission wherein, the p polarized component is then reflected back by the polarizer 13, be converted to the s polarized light through quarter-wave plate 11 after twice, also seeing through the polarizer 13.These s linearly polarized lights behind field lens 14, are polarized Amici prism 15 and are mapped on the colored LCoS device 20 again.The part of these light converts the p polarized light to after the modulation of colored LCoS device 20, and band epigraph information, and transmission is throwed away by shadow-mark object lens 16 by behind the polarization splitting prism 15 again, makes Projection Display.Those do not have the light through colored LCoS device 20 modulation then still not remain the s polarized light in addition, be polarized Amici prism 15 refractions once more after, penetrate back wedge type optical wand 12.Because led light source 10 of the present invention can reflect the light that the overwhelming majority is injected into its surface, the effect of its this moment just is equivalent to a catoptron, can reflect back that part of light that reflects once more, has improved luminous intensity and be equivalent to.This shows, adopt led light source of the present invention after, can improve the utilization ratio of light greatly.
Fig. 5 illustrates another embodiment that led light source according to the present invention is used for colored LCoS projection display system.Equally, the light of launching by led light source 10 of the present invention, after the homogenizing of wedge type optical wand 12, become white light, arrive polarization splitting prism 15 through field lens 14 again, be divided into two-beam by this Amici prism, a branch of s polarizing light irradiation is to colored LCoS device 20, and another bundle p polarized light then shines on the colored LCoS device 30 of another piece.Changed its original polarization state by colored LCoS device 20 and 30 light of modulating respectively, and band epigraph information, projection objective 16 projection imagings arrived through polarization splitting prism 15 again.When colored LCoS device 20 when being identical with image information on 30, what project is common two dimensional image, but can provide when using monolithic colour LCoS device the more image of rich colors; And when the image information on colored LCoS device 20 and 30 corresponded respectively to left vision and right vision, then projectable went out three-dimensional 3-D view.All the other those not by colored LCoS device 20 and 30 light of modulating, after respectively by colored LCoS device 20 and 30 reflections, because of not changing its polarization state, pass through polarization splitting prism 15 once more after, be launched into again in the wedge type optical wand 12.Similarly, this moment, the effect of led light source 10 of the present invention was equivalent to a catoptron, this part light can be recycled once more, thereby be improved the light utilization ratio of whole optical projection system greatly.
Led light source of the present invention, the surface configuration of its base seat can also be curved surface or polyhedron surface except being the plane, can more effectively carry out homogenizing to its light that sends like this, and when identical outgoing bore, this spatial structure can more help the heat radiation of chip.The diagrammatic cross-section of the led light source of the present invention when Fig. 6 illustrates base seat and is curved surface.The surface normal of the luminescence chip 2 that draws among the figure and the surface normal basically identical of base seat curved surface, but during actual the use, the two also can be inconsistent, promptly an angle can be arranged between the two, and the scope of this angle is for example between 45 ° of 0 ° of ∽.Under the situation that has more a plurality of chips, for each chip, this angle can be identical, also can be different.But their principle of work all with above-mentioned basic identical, is omitted its detailed description here.
Below describe the preferred embodiments of the present invention in conjunction with the accompanying drawings in detail.But, it will be appreciated by those skilled in the art that foregoing is exemplary, scope of the present invention only is defined by the claims.
Claims (12)
1. a LED Projection Display light source comprises LED luminescence chip array and fixes the base seat of this array, and it is characterized in that: at least one surface has reflection configuration in described chip array and the described base seat.
2. LED Projection Display light source as claimed in claim 1, it is characterized in that: described reflection configuration comprises the optical coating layer.
3. LED Projection Display light source as claimed in claim 2, wherein the optical film on LED luminescence chip surface has the spectrum through this LED emission, and the characteristic that reflects other band spectrum.
4. LED Projection Display light source as claimed in claim 3, wherein the optical film on LED luminescence chip surface is complete dielectric multi-layered optical thin film.
5. LED Projection Display light source as claimed in claim 2 wherein is coated with at the full wave high catoptrics rete of visible light except that on the extra-regional surf zone that is covered by the LED luminescence chip at base seat.
6. LED Projection Display light source as claimed in claim 5, the wherein high catoptrics rete that is plated on the base seat surface metallic diaphragm that is high reflectance.
7. LED Projection Display light source as claimed in claim 5, the wherein high catoptrics rete that is plated on the base seat surface combination rete that is metal and medium.
8. LED Projection Display light source as claimed in claim 5, wherein the high catoptrics rete that is plated on the base seat surface is the complete dielectric multi-layered optical thin film of broadband reflection.
9. LED Projection Display light source as claimed in claim 1, wherein each LED luminescence chip is inlaid in the described base seat, makes the surface of the surface of each LED luminescence chip and base seat basically in same plane.
10. LED Projection Display light source as claimed in claim 1, wherein each LED luminescence chip is inlaid in the described base seat, and the surface of base seat is a curved surface or polyhedron surface.
11. LED Projection Display light source as claimed in claim 10, wherein the surface normal of the surface normal of each LED luminescence chip and base seat has angle, and the scope of angle is between 0 °～45 °.
12. a projection arrangement comprises LED Projection Display light source, it is characterized in that, described Projection Display comprises LED luminescence chip array and fixes the base seat of this array with light source, and at least one surface of described chip array and described base seat has reflection configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610140331A CN100590514C (en) | 2006-11-27 | 2006-11-27 | Light source for LED projection display and projection device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610140331A CN100590514C (en) | 2006-11-27 | 2006-11-27 | Light source for LED projection display and projection device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101191984A true CN101191984A (en) | 2008-06-04 |
| CN100590514C CN100590514C (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610140331A Expired - Fee Related CN100590514C (en) | 2006-11-27 | 2006-11-27 | Light source for LED projection display and projection device using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683776A (en) * | 2015-03-12 | 2015-06-03 | 江苏奇胜信息科技有限公司 | Composite LED dot matrix light source for DLP rear projection television and optimization method thereof |
| CN112628679A (en) * | 2020-12-11 | 2021-04-09 | 杭州新湖电子有限公司 | Combined luminous film photography lamp |
| CN113640817A (en) * | 2012-03-26 | 2021-11-12 | 螳螂慧视科技有限公司 | Three-dimensional camera and projector thereof |
-
2006
- 2006-11-27 CN CN200610140331A patent/CN100590514C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640817A (en) * | 2012-03-26 | 2021-11-12 | 螳螂慧视科技有限公司 | Three-dimensional camera and projector thereof |
| CN104683776A (en) * | 2015-03-12 | 2015-06-03 | 江苏奇胜信息科技有限公司 | Composite LED dot matrix light source for DLP rear projection television and optimization method thereof |
| CN112628679A (en) * | 2020-12-11 | 2021-04-09 | 杭州新湖电子有限公司 | Combined luminous film photography lamp |
| CN112628679B (en) * | 2020-12-11 | 2022-04-15 | 杭州新湖电子有限公司 | Combined luminous film photography lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100590514C (en) | 2010-02-17 |
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Granted publication date: 20100217 Termination date: 20101127 |