CN101563637A - Illumination module and method - Google Patents
Illumination module and method Download PDFInfo
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- CN101563637A CN101563637A CNA2006800566338A CN200680056633A CN101563637A CN 101563637 A CN101563637 A CN 101563637A CN A2006800566338 A CNA2006800566338 A CN A2006800566338A CN 200680056633 A CN200680056633 A CN 200680056633A CN 101563637 A CN101563637 A CN 101563637A
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- light
- lens
- light source
- optical element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3152—Modulator illumination systems for shaping the light beam
Abstract
An illumination unit provides light for a projection display system. The illumination unit includes a light guide defined by an entry angle. A light source 200 provides emitted light according to a characteristic radiation pattern. A lens arrangement including at least one lens collects a portion of the light emitted through the radiation pattern and focuses the collected light so as to reach the light guide within the entry angle 215. The portion of emitted light that is collected, and the collected light that enters the light guide within the angle, cooperate to maximize a percentage of the light source's emitted light that is usable by the projection optics portion of the system.
Description
Technical field
The present invention relates to a kind of being used for light from the lighting unit of luminescence unit guiding to image projection device.
Background technology
(spatial light modulation, SLM) display system is to use the system by the light of reflection of the discrete component of spatial light modulator or transmission to spatial light modulation, also claims imager sometimes, so that produce the image that shows.The spatial light modulator of a type be Digital Micromirror Device (digital mirror device, DMD).Known SLM display system, it comprises DMD, for example commercially can obtain (Digital Light Processing) with the DLP trade mark from TexasInstruments company.
Fig. 1 shows traditional SLM projection display system 10.This system 10 comprises light source 11.Light source 11 generally comprises the arc lamp of emission white light.White light from light source 11 propagates into DMD19 along the light path that limits illumination subsystems 21 from light source 11.The light path of described illumination subsystems 21 is extended along the longitudinal axis 2.
In Fig. 1, DMD19 comprises imager, and this imager comprises dmd chip.DMD19 comprises the array of single mirror element.Simultaneously, the mirror element of DMD19 according to vision signal (for example, providing) modulation by video source 35 from the light of second condenser lens 17 to form image.Imager 19 is transmitted to projecting lens part 29 with the light of modulation.Projecting lens part 29 with the modulation light focusing with display image on screen 31.
The conventional light source 11 that is used for display system 10 comprises, for example metal halide lamp and ultrahigh pressure mercury lamp.But these lamps also have shortcoming.Their life-span is shorter relatively, is typically several thousand hours.Therefore, must often change lamp.
Compare with the lamp that uses in the conventional projection display, light-emitting device, (LED) has advantage as light emitting diode.LED compares with other light sources, has the relatively long life-span.Although have this advantage, LED is not widely used as the light source of SLM display.This is because the shortcoming relevant with the LED luminescent properties.A shortcoming is the brightness of image that is difficult to realize enough being used for the projection TV purposes.The light ratio metal halide lamp that LED sends or the light of high-pressure sodium lamp.For the projection display, brightness is an important performance.
In the display application occasion, another problem that LED produces is their luminous pattern.LED divergently launches light.Therefore, a big chunk from the light of led light source emission does not arrive display screen 31.This characteristics of luminescence makes that traditional led light source relative efficiency is lower.
Proposed to comprise that the array of a plurality of LED is used for the light amount of the illumination image of image projection device with increase.Regrettably, the emitting area of array is proportional with the number of the LED that forms array.Therefore, irrelevant with the number of the LED that is adopted, for most of projection application, the efficient of array is still too low.Need be used to assemble system and method efficiently from the light of led light source.
Summary of the invention
Lighting module provides light to the downstream part of display system, and light only can be used in this downstream part when light incides in the special angle of optical axis.Light source provides emission light according to the feature luminous pattern.The lens devices gathering that comprises at least one lens is by the part of the light of described luminous pattern emission and with the light focusing of being assembled, so that entering described downstream part in described optical axis certain angle.The quilt part of assembling of emission light and in described angle, enter being cooperated of downstream part by collected light, the number percent that the light that sends with the maximization light source can be utilized by the downstream part.
Description of drawings
Embodiments of the invention will describe in detail with reference to accompanying drawing below more, and wherein identical Reference numeral refers to identical or corresponding parts from start to finish, and wherein:
Fig. 1 is the calcspar that adopts traditional SLM display system of Digital Micromirror Device (DMD) and conventional light source;
Fig. 2 is that described redness, green and blue led light source are arranged in the corresponding lighting unit according to the calcspar of the SLM display system that comprises redness, green and blue led light source of embodiment of the present invention;
Fig. 3 is the calcspar that is used for the lighting unit of SLM display system according to another embodiment of the present invention, and the SLM display system comprises the led light source that white light is provided and is used to filter the colour wheel of white light;
Fig. 4 is the more detailed calcspar of the lighting unit of the SLM of being used for display system according to an embodiment of the invention;
Fig. 5 is the calcspar of lighting unit according to another embodiment of the present invention;
Fig. 6-the 7th, the calcspar of lighting unit according to another embodiment of the present invention.
Embodiment
Among the embodiment in the accompanying drawings,, adopt specific term for purpose clearly.Yet the present invention is intended to be confined to the particular term selected like this, and should be appreciated that each specific element comprises that all move in a similar manner to realize the technical equivalents thing of similar purpose.In addition, purpose for simplicity, its implementation is omitted by feature well known by persons skilled in the art and process.
Fig. 2
Fig. 2 is the calcspar that comprises the optical module of spatial light modulation (SLM) display system 100.System 100 relies on a plurality of light source methods.In this method, each color (red, green and blue) had a light source.Described a plurality of light source method produces a plurality of images with each light source.Described image is in conjunction with showing to produce colour.
Described display system 100 comprises light optics part 144.Light optics part 144 comprises three separately corresponding to lighting unit 111,112,113 red, green, the blue led light source.Lighting unit 111,112,113 comprises corresponding led light source (clear illustrating in Fig. 3) separately.
According to the embodiment shown in Fig. 2, lighting unit 112, X-cube 120 and photoconduction 192 are provided with so that use the light from each lighting unit 111,112,113 to illuminate DMD194 along the longitudinal axis 117.Light is along passing photoconduction 192 by the direction shown in the arrow 133 substantially.In one embodiment of the invention, the optical module that comprises light optics part 144 is symmetrical arranged along the longitudinal axis 117.
Traditional optics X-cube beam combiner 120 will be from the red component light of lighting module 111, from the green component light of lighting module 112 and from the blue component light-receiving and the combination of lighting module 113.In a plurality of embodiment, identical or similar (except color) gone up in lighting module 111,112,113 designs.Fig. 5 that describes below-7 shows the embodiment of a plurality of lighting modules.
X-cube 120 is traditional structures.Substantially, should be appreciated that the X-cube uses the crossed dichroic light filter, allows other wavelength to pass through so that reflect a wavelength simultaneously.Green glow is by redness and blue filter.Reflection to red light leaves red filter and by blue filter, blu-ray reflection leaves blue filter and passes through red filter.Such design combines three kinds of colors.X-cube device is made by a lot of companies and is used in a lot of many LCD of high temperature projectors.Therefore, their operation does not need here to describe in further detail.
As shown in Figure 12, X-cube 120 combines redness, green, blue component light.X-cube 120 offers the light of combination the opening 800 of photoconduction 192 subsequently.Photoconduction 192 is sent to DMD194 with light.Display system 100 further comprises the projection optics part 220 that extends to display screen 196 from DMD194.Projection optics part 220 projects to image in the projection surface 196 from DMD194.
In certain embodiments of the invention, negative lens 121,122,123 inserts between lighting module 111,112,113 and the light cube 120.For example, in certain embodiments, the light path between lighting module and the optical channel 192 is very short, so that is not used in the cubical space of light.In such embodiments, negative lens 121,122,123 effectively extends light path.Like this, light cube 120 can be received under the situation of the design advantage of not sacrificing lighting module.Can contemplate according to another embodiment of the present invention display system comprise more than or be less than three lighting modules 111,112,113.
In the embodiments of the invention shown in Fig. 2, each comprises at least one light emitting diode (LED) lighting unit 111-113.In some embodiments of the invention, each lighting unit comprises a plurality of corresponding a kind of LED that are used for sending three primary colors.In the exemplary embodiment shown in Fig. 2, first light source 111 comprises the led array that is used to send blue light, and secondary light source 112 comprises the led array that is used to send green glow, and the 3rd light source 113 comprises the led array that is used to send ruddiness.Yet, also can use other color and layout.Light from the LED that constitutes lighting unit 111-113 points to DMD194 by light optics part 144.
In Fig. 2, light optics part 144 comprises photoconduction 192, is also referred to as optical channel (being also referred to as light pipe) 192.Photoconduction 192 comprises the opening 800 of at least a portion that is used to receive the light that is provided by X-cube 120.120 that provide by the X-cube, within incident angle A (clear illustrating in Fig. 4), incide light on the opening 800 and be allowed to by opening 800 and pass photoconduction 192.Photoconduction 192 drives the imager assembly 194 that comprises DMD.
In one embodiment of the invention, projecting lens part 220 is contained in the assembly 194.Projecting lens part 220 with ray cast to display 196 as screen.In a lot of embodiment, optical channel 180, projection optics part 220, imager assembly 194 and display screen 196 are traditional structures.Therefore, they here are not described further.
Imager assembly 194 comprises DMD.DMD comprises the micro-mirror element array.These elements light that modulation is received by DMD144 according to vision signal together.DMD194 is configured such that its each mirror element is in a kind of in two kinds of different heeling conditions, promptly or be in " opening " state, perhaps is in " pass " state.DMD194 only is configured such that the mirror element that is in " opening " state is towards the optical element indirect illumination light that comprises projection optics part 220.Therefore, illuminating ray is passed projection optics part 220 and is finally formed display image in projection surface 196 by the part of the described mirror element reflection that is in " opening " state.
Fig. 3
Multiple light courcess method shown in Fig. 2 has advantage in some application scenario.Utilize three independent lighting modules significantly to increase the size and sophistication of display system.The additional embodiments of DMD type display system is shown in Figure 3.Display system 300 comprises a lighting module 310 according to an embodiment of the invention.Lighting module 310 comprises led light source.System compares with many lighting modules, uses single lighting module 310 to have the little advantage of size.Use single light source to reduce the complicacy of display size and light engine.
According to some embodiments of the present invention, lighting unit 344 also comprises colour wheel 312.When light described colour wheel 312 when lighting unit 310 to DMD394 moves inserts the path of light.The led light source of lighting unit 310 produces white light and thinks that each color (red, green and blue) produces image.Color produces according to the time successively by rotation colour wheel 312.When colour wheel 312 rotation, be filtered by this colour wheel from the white light of led light source.The corresponding image of color illumination of wishing.The image of different colours produces very soon, so that when seeing on display screen 396, eyes synthesize correct color framing with them.
The optical module that comprises lighting unit 310 and light optics part 344 is provided with along the longitudinal axis 317.Projection optics part 320 propagates into display screen 396 with light from DMD394.Described light optics part 344 is carried out will be from the light smoothing function of the light source that constitutes lighting unit 310.Light optics part 344, and special photoconduction 392 makes the minimum that influences of the glazed thread light of axle 317 (for example, along) and the luminance difference between axial ray.Therefore, can realize inciding the inhomogeneity improvement of the Luminance Distribution of the light on the element of DMD 394.
Fig. 4
Fig. 4 is the calcspar according to the lighting unit 310 of the display system 300 shown in Fig. 3 of embodiments of the invention structure.Lighting unit 310 comprises led light source 200, first lens 201 and at least one second lens 202.Optionally, in certain embodiments of the present invention, the 3rd lens 203 comprise lighting unit 310.According to one exemplary embodiment of the present invention, LED200 comprises commercially available great power LED, for example, LUXEON is high-power+and LED (LUXEON LED is commercial can be from San Jose, and the Lumileds lighting of CA obtains).
In each embodiment, light source 200 is to select from the group that comprises redness, green, blueness, white and other colors LED.Light source 200 is according to feature LED luminous pattern emission light.The light that is sent by LED200 passes lens 201,202 and (optionally) 203 conversely.In one embodiment of the invention, lens 201,202,203 are aimed at along the common optical axis 301 that comprises light source 200.
Desirable, the luminous pattern of light source with all luminous energy guiding for being blocked and being used for image projection.Yet in practice, the typical LED luminous pattern is wasted a certain amount of light.Some light that arrive photoconduction 392 will be pointed to opening 800 by the big angle of ether, and can not enter photoconduction 392.Make it fall into the entering angle of photoconduction 392 within by guiding from the light of light source according to the lighting unit 310 of the embodiment of the invention and make that the light of wasting is minimum.The present invention recently raises the efficiency by increasing the percentage that arrives the light of photoconduction 392 in entering angle, and described entering angle is angle A for example, limits with respect to axle 301.
Lens among Fig. 4 form ellipse in the calcspar of simplifying.Various according to an embodiment of the invention lens type, position and being oriented in shown in Fig. 4-7.In certain embodiments, first lens 201 are collimating apparatuss, for example unit number FLP-HNB3-LL01-0 (Fraen company, Reading, Massachusetts).In a plurality of embodiment, lens 202,203 are embodied as the various combinations of the lens of aspherical condenser, plano-convex lens and other types.
Shown in Fig. 4 and hereinafter the structure of describing is limited by distance and lens specification according to the principle of the invention.The optical module of lighting unit 310 provides in Table I according to an embodiment of the invention.
Table I: the definition of distance
| Length | Definition |
| L1 | The optical range of (nearest axle is gone up point) from the surface of emission of |
| SEP | Optical interval (nearest axle is gone up between the point) between the |
| L2 | From the output of lens 203 (if present; Otherwise be 202) to the optical range (nearest axle is gone up between the point) in the input aperture of |
Total optical path length L between the opening 800 of light source 200 and photoconduction 392
TotalProvide by following formula:
L
Total=L1+ thickness (202)+SEP+ thickness (203)+L2
Wherein, the central thickness of the lens that thickness (n) representative is specified promptly, is passed the distance of lens along optical axis 301 by light.In the embodiment that lens 203 are omitted, SEP and thickness (203) are zero.
In one embodiment, the Part No. of light source 200 is LXHL-PW03,3 watts LUXEON
TMSTAR (San Jose, the registered trademark of the Lumileds company of CA).Lens 201 be embodied as collimating apparatus Part No. FLP-HNB3-LL01-0 (Fraen company, Reading, Massachusetts).Various being chosen in hereinafter of lens 202 and 203, position and orientation discussed, and these points will be noted.
In brief, wish the efficient of the light optics part of maximization system 300.Here efficient is defined as arriving the part of the opening 800 of photoconduction 392 in respect to the entering angle A of axle 301 from the light that light source 200 sends.
Entering angle A limits according to the particular optical assembly that comprises light optics part, and to a certain extent, partly limits according to the projection optics of system 300.The light that arrives opening 800 in this angle A is called as " useful " light.Useful light can use in the illumination of imager 394.The greater amount light that meets this requirement provides more performance for system 300.The embodiment of the lighting module of being contained by Fig. 5-7 is limited by structural parameters L1, SEP and L2 to small part.Performance is also with the selection of lens 202 and 203 or design relevant.
The product of the solid angle of light-emitting area and the light that sent by LED is the conservative value that is called as " etendue ".Because the etendue conservation, the product of the solid angle of light-emitting area and the light that sent by LED should equal the product of solid angle of the incident of the area of imaging device and imaging device.The etendue of described imaging device is determined by its geometric configuration.
Here, light source 200 luminous solid angles are the luminous solid angles of LED.In case selected specific device, the area of imaging device 394 is fixed.Outside the scope of the solid angle that can effectively pass through the projecting lens projection, there are some light, and light losing takes place.Described loss reduces the optical efficiency of system 300.Therefore, although more LED is provided, the brightness of imaging device 392 is also very limited sometimes.
The invention provides the higher system of efficient, the feasible light amount optimum that enters photoconduction 392 of this system.Higher efficient means more rays and makes better exports the projector (perhaps other devices) that throws light on the whole.Yet, make the light amount enter photoconduction 392 maximum with optimization light enter photoconduction 392 entering angle need conflict.It is very important to optimize entering angle A, can not be projected optics and utilizes because be parallel to the light of optical axis 301 hardly.Useless light representative waste optical energy.General system can use the light within 10 to 15 degree of the axle that is parallel to optical axis 301.
In order to simplify, the embodiment of utilization " finished product " (commercially available) lens has been described in following argumentation.Certainly, the embodiment of specialized designs lens of the present invention also can contemplate.The present invention should not be limited to the commercial embodiment that obtains lens of selection.
Fig. 5
Among Fig. 5, on-plane surface (convex surface) 502C, the 503C of lens 502,503 are relative to each other.The plane 502p of lens 502 is in the face of lens 501.The plane 503p of lens 503 is in the face of photoconduction 392.According to optional embodiment, the plane of giving fix-focus lens 502,503 along with the side shown in Fig. 5 in the opposite direction (referring to following argumentation) to Table III point to.
In addition, in other embodiment, lens 503 are removed fully.For example, Fig. 6 and 7 shows second lens not at first lens (602 and Fig. 7 of Fig. 6 702) embodiment afterwards.
Fig. 6 and 7 embodiment utilize single lens to realize two functions.In order to realize these functions, lens are by according to by the size configurations shown in Table I, II and the III.In addition, the relative position of lens and orientation are utilized according to structure optimization of the present invention.
With reference to Fig. 4, the opening 800 of photoconduction 392 defines an xsect, and this xsect is paid attention in arranging assembly of the present invention.For the xsect of different size, the invention provides best lens arrangement.Below argumentation represented the structural parameters relevant with 8mm * 4.5mm photoconduction 392.Such photoconduction is typically the photoconduction that uses with TI (Texas Instruments company) HD-2DLP imager.
In the above embodiment of the present invention, lens 202 comprise the non-spherical lens than f/1 fast (faster).The focal distance ratio lens 202 of lens 203 are long.
Generally, according to embodiments of the invention, the relative position of lens 201,202,203 is by following principle adjustment.If lens 202 focal lengths are greater than lens 203, L1 is greater than L2.If the focal length of lens 203 is greater than lens 202, L2 is greater than L1.SEP selects according to the xsect of photoconduction 392.
Table II shows the example of the lens Part No. of the specific embodiment that is used for lens 202,203 in accordance with the principles of the present invention.Part No. from Edmund industry Optical Co., Ltd (Barrington, NJ).Each lens is reduced to A, B, C or D so that easier hereinafter argumentation Table III.
Table II
Realize candidate's part of lens 202,203
| Lens | Lens type | Diameter (MM) | Equivalent focal length (MM) | f/# | Thickness (MM) | |
| “A” | 43988 | |
35 | 26.20 | 0.7 | 15 |
| “B” | 43987 | Aspherical condenser | 27 | 13.00 | 0.5 | 9.25 |
| “C” | 45098 | Plano-convex | 25 | 25.00 | 1.0 | 9.25 |
| “D” | 32971 | Plano-convex | 50 | 50.00 | 1.0 | 12 |
Table III shows the result who utilizes aforesaid Fraen collimating apparatus (realize lens 201), and from the multiple combination (comprising lens 202,203) of the part of the Edmund industry Optical Co., Ltd of Table II.The result represents with efficient.Here be to be in the number percent that enters the light of downstream part in 10-and the 15-degree angle with definitions of efficiency at optical axis around the reception opening 800 that enters photoconduction 392.
In the embodiment shown in the Table III, the plane of lens 202 is in the face of the upstream, and promptly towards lens 201, and the plane of lens 203 is in the face of the downstream, promptly towards optical channel 392.An exception of this orientation is used sign "] in Table III " mark."] " represent that the plane of lens 202 is in the face of the downstream.Lens 203 are used " nothing " mark by whole abridged embodiment in " lens 203 " hurdle.
Table III: result
Fig. 5 has illustrated the embodiments of the invention according to the #1-#16 structure of Table III.Fig. 6 has illustrated the embodiment of the invention of #17, #18, #21 and #23 structure according to Table III.Fig. 7 has illustrated the embodiment of the invention of #19, #20, #22 and #24 structure according to Table III.In some embodiments of the present invention, before the opening 800 of photoconduction 392, be provided with supplementary lens according to #6 (B-A) structure.
Some embodiments of the present invention comprise combined optical device (for example, the X cube 120).Such embodiment perhaps constructs according to structure #16 (D-C) according to structure #4 (D-D) structure.Simple lens embodiment of the present invention is according to #18 (B) and #19 (B]) structure.One embodiment of the present of invention comprise the f/2.8 system.Such embodiment is according to #12 (C-B) structure of Table III.
In certain embodiments, lens (202) with the emission light of LED500 at least 27% at the opening 800 that in optical axis (structure #18) the 10 degree angles of photoconduction 392, is provided to photoconduction 392.
In certain embodiments, lens (202) provide at least 27% emission light in the optical axis 10 degree angles of photoconduction 392, and provide 31% emission light in optical axis 15 degree angles (structure #19).
In certain embodiments, lens (202) downstream part (320) provide at least 34% emission light in optical axis (301) 15 degree angles (structure #19).
In certain embodiments, lens (202) part (320) downstream provide at least 24% in optical axis 10 degree angles, and 34% emission light is in optical axis (301) 15 degree angles (structure #19).
In certain embodiments, lens (202) comprise non-spherical cavity lens (Table II lens " B "; Structure #18 or #19).In certain embodiments, lens devices comprises first lens (202), and these first lens have first focal length and are configured to assemble light by luminous pattern emission, and with the light assembled towards second lens (203) transmission; And second lens, these second lens have at least and the same second long focal length of first focal length, and are configured to the light focusing that will assemble so that entering downstream part (220) (Fig. 4-poly-lens) within the angle (215) of optical axis (210).
In certain embodiments, first (202) and second (203) lens jointly downstream part (220) provide at least 40% emission light within 15 degree angles of optical axis (structure #6).
In certain embodiments, first (202) and second (203) lens jointly downstream part (220) provide at least 30% emission light within 10 degree angles of optical axis; 40% emission light is within 15 degree angles of optical axis (structure #6).
In certain embodiments, first (202) and second (203) lens jointly downstream part (220) provide at least 33% emission light within 10 degree angles of optical axis (structure #12).
In certain embodiments, first (202) and second (203) lens jointly downstream part (220) provide at least 33% emission light within 10 degree angles of optical axis, 36% emission light is within 15 degree angles of optical axis (structure #12).
In certain embodiments, (220) comprise light binding member (120) to described display system before in the downstream part, first (202) and second (203) lens jointly downstream part (320) provide at least 20% emission light within 10 degree angles of optical axis, 28% emission light is within 15 degree angles of optical axis (structure #4, #16).
In certain embodiments, first lens (202) comprise plano-convex lens, and this plano-convex lens is configured to receive in the plane light and from the convex surface transmitted ray.In certain embodiments, second lens (203) comprise plano-convex lens, and this plano-convex lens is configured on convex surface to receive light and from the plane transmitted ray.In certain embodiments, one of at least the first and second lens are non-spherical lenses.In certain embodiments, one of at least the first and second lens are spherical lenses.
The present invention also provides the method for supporting that comprises at least one lens.Described method provides light to arrive display system optics of lens part (320).The step that the embodiment of described method comprises is: (a) provide (200) emission light according to the feature luminous pattern; And (b) maximization can be shown the number percent of the emission light (from 200) that the downstream part (220) of system uses.Described maximization steps comprises: a part that cooperates (b1) to assemble in (202) luminous pattern is launched light; And (b2) with the light focusing assembled (Fig. 5,6 lens 202, perhaps the lens 202+203 of Fig. 4) so that, for example enter photoconduction 392 within the angle A of axle 301 with respect to optical axis.
In certain embodiments, described gathering and focus steps comprise that assembling a part launches light and utilize single lens (202) with the light focusing of assembling (Fig. 6 and 7).
In certain embodiments, described agglomeration step comprises: utilize first lens with first focal length to assemble part emission light; And described focus steps comprises and utilizes second lens have at least with same long second focal length of first focal length with the light focusing of being assembled.
The foregoing description only is example and is not considered to restriction of the present invention.The description of described embodiment is used to illustrate rather than limit the scope of claim.According to above instruction, a lot of possibilities, modification and variation will be clearly to those skilled in the art.Certainly embodiment can change and still keep within the scope of the invention simultaneously.Therefore, should be appreciated that in the scope of the equivalent of claims and they that the present invention may be embodied as different with special description here.
Claims (10)
1. a display system comprises: light emitting diode (LED) light source, light accumulation unit and optical projection unit; Described smooth accumulation unit comprises first lens, second lens and elongated photoconduction at least, and described photoconduction comprises the opening that is limited by entering angle, and described accumulation unit is characterised in that:
Described first and second optical elements and described photoconduction are aimed at along common axle;
Described first optical element is coupled to described second optical element with respect to described light source setting with the major part of the light that will be sent by described light source;
Described second optical element is coupled to described opening with at least a portion from the light of described first optical element within described entering angle;
Described second optical element and described light source are along described axle partition distance L1;
Described opening and described second optical element are along described axle partition distance L2;
Wherein said first optical element comprises collimation lens, described second optical element comprises non-sphere lens, described entering angle is no more than 15 degree with respect to described axle, and the total light that wherein sends from described light source at least 15% within described entering angle, be provided to described opening by described accumulation unit.
2. display system as claimed in claim 1, wherein said entering angle is no more than 10 degree with respect to described axle.
3. one kind is used to assemble the light that sends from led light source and the light of being assembled is provided to the optical module of the inlet of optical channel, and wherein said LED and described inlet are aimed at and distance of separation (L on described common axis along common axis
T), described optical module comprises:
First optical element, this first optical element is couple to described light source around the central shaft of described module;
Second optical element, this second optical element is arranged between first optical element and the described inlet around described central shaft, and separates the distance of 7.4mm (L1) at least with described light source;
Being characterized as of described second optical element: the thickness of 8mm (t1), diameter (d1), the effective focal length of 13mm (EFL1) and the burnt number of 0.5mm (focal number) is (f1) at least at least at least;
Described module is characterised in that efficient (E) at least 15%;
Wherein said collection angle (A) at least 10 degree.
4. device as claimed in claim 1, wherein said light source comprises at least three light emitting diodes.
5. device as claimed in claim 4, wherein said at least three light emitting diodes comprise at least one redness, at least one is blue and at least one green LED.
6. device as claimed in claim 1, wherein said at least one light source comprises white light source, described system also comprises rotary color element (rotating color element), and this element coupling is to receive described white light and to provide colorama to described array from described light source.
7. device as claimed in claim 1, the described part light that wherein within described entering angle, is coupled to described light-ray condensing device be at least the light that sends by described light emitting diode total light 10.
8. device as claimed in claim 1, the described part light that wherein within described entering angle, is coupled to described light-ray condensing device be at least the light that sends by described light emitting diode total light 1 15.
9. device as claimed in claim 1, the described part light that wherein within described entering angle, is coupled to described light-ray condensing device be at least the light that sends by described light emitting diode total light 20 percent.
10. the downstream part (220) to display system (100,101) provides the method for light, and this downstream part only just can utilize light when light incides within the given angle (215) of optical axis (210), and this method comprises:
A) provide the light that sends (200) according to the feature luminous pattern; With
B) maximize the number percent that the light (from 200) that sends can be shown downstream part (220) utilization of system, described maximization steps comprises the cooperation of following step:
B1) part (202) of the light that sends in the gathering luminous pattern; With
B2) with the light focusing assembled so that within the described given angle (215) of described optical axis (210), entering described downstream part (220).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2006/047930 WO2008073105A1 (en) | 2006-12-15 | 2006-12-15 | Illumination module and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101563637A true CN101563637A (en) | 2009-10-21 |
| CN101563637B CN101563637B (en) | 2013-04-10 |
Family
ID=38137665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800566338A Expired - Fee Related CN101563637B (en) | 2006-12-15 | 2006-12-15 | Illumination module and method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2095166A1 (en) |
| JP (1) | JP5537950B2 (en) |
| KR (1) | KR20100014266A (en) |
| CN (1) | CN101563637B (en) |
| MX (1) | MX2009005746A (en) |
| WO (1) | WO2008073105A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012141483A (en) * | 2011-01-05 | 2012-07-26 | Mitsubishi Electric Corp | Design method of led light source device and led light source device |
| TWI459122B (en) * | 2013-01-17 | 2014-11-01 | Delta Electronics Inc | Optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403847A (en) * | 2001-08-31 | 2003-03-19 | 三星电子株式会社 | Projector equipment |
| CN1415980A (en) * | 2001-11-02 | 2003-05-07 | 日本电气视象技术株式会社 | Polarizing unit, Polarizing illumination and projection displaying appts. |
| CN1595224A (en) * | 2003-09-08 | 2005-03-16 | 精工爱普生株式会社 | Lighting unit and projector including the same |
| EP1569467A2 (en) * | 2004-02-27 | 2005-08-31 | LumiLeds Lighting U.S., LLC | Illumination system with aligned leds |
| CN1837893A (en) * | 2005-03-22 | 2006-09-27 | 汤姆森特许公司 | Imaging system for projector and corresponding projector |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4382434B2 (en) * | 2003-10-17 | 2009-12-16 | Ｎｅｃディスプレイソリューションズ株式会社 | Polarized light source device for projection display device |
| US7300177B2 (en) * | 2004-02-11 | 2007-11-27 | 3M Innovative Properties | Illumination system having a plurality of light source modules disposed in an array with a non-radially symmetrical aperture |
| JP2005300712A (en) * | 2004-04-08 | 2005-10-27 | Nikon Corp | Projection type display device |
| US7137708B2 (en) * | 2004-06-23 | 2006-11-21 | Hewlett-Packard Development Company, L.P. | Infra-red and ultraviolet filtration in projection systems |
| US7465054B2 (en) * | 2004-10-29 | 2008-12-16 | Hewlett-Packard Development Company, L.P. | Focusing arrangement |
| US20060139580A1 (en) * | 2004-12-29 | 2006-06-29 | Conner Arlie R | Illumination system using multiple light sources with integrating tunnel and projection systems using same |
| US7422330B2 (en) * | 2005-03-30 | 2008-09-09 | 3M Innovative Properties Company | Illumination system and projection system using same |
-
2006
- 2006-12-15 WO PCT/US2006/047930 patent/WO2008073105A1/en active Application Filing
- 2006-12-15 MX MX2009005746A patent/MX2009005746A/en active IP Right Grant
- 2006-12-15 KR KR1020097012278A patent/KR20100014266A/en not_active Application Discontinuation
- 2006-12-15 JP JP2009541283A patent/JP5537950B2/en not_active Expired - Fee Related
- 2006-12-15 EP EP06845547A patent/EP2095166A1/en not_active Withdrawn
- 2006-12-15 CN CN2006800566338A patent/CN101563637B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403847A (en) * | 2001-08-31 | 2003-03-19 | 三星电子株式会社 | Projector equipment |
| CN1415980A (en) * | 2001-11-02 | 2003-05-07 | 日本电气视象技术株式会社 | Polarizing unit, Polarizing illumination and projection displaying appts. |
| CN1595224A (en) * | 2003-09-08 | 2005-03-16 | 精工爱普生株式会社 | Lighting unit and projector including the same |
| EP1569467A2 (en) * | 2004-02-27 | 2005-08-31 | LumiLeds Lighting U.S., LLC | Illumination system with aligned leds |
| CN1837893A (en) * | 2005-03-22 | 2006-09-27 | 汤姆森特许公司 | Imaging system for projector and corresponding projector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010513948A (en) | 2010-04-30 |
| EP2095166A1 (en) | 2009-09-02 |
| JP5537950B2 (en) | 2014-07-02 |
| CN101563637B (en) | 2013-04-10 |
| WO2008073105A1 (en) | 2008-06-19 |
| KR20100014266A (en) | 2010-02-10 |
| MX2009005746A (en) | 2009-06-08 |
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