CN101563637B - Illumination module and method - Google Patents

Illumination module and method Download PDF

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Publication number
CN101563637B
CN101563637B CN2006800566338A CN200680056633A CN101563637B CN 101563637 B CN101563637 B CN 101563637B CN 2006800566338 A CN2006800566338 A CN 2006800566338A CN 200680056633 A CN200680056633 A CN 200680056633A CN 101563637 B CN101563637 B CN 101563637B
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light
optical element
light source
lens
opening
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CN101563637A (en
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埃斯蒂尔·T·豪尔
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Thomson Licensing SAS
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Thomson Licensing SAS
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061Condensers, 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028Condensers, 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4298Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/315Modulator illumination systems
    • H04N9/3152Modulator 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

Lighting module and method
Technical field
The present invention relates to a kind of for the lighting unit of light from luminescence unit guiding to image projection device.
Background technology
Spatial light modulation (spatial light modulation, SLM) display system is the system that uses by the light of the discrete component reflection of spatial light modulator or transmission, sometimes also claims imager, in order to produce the image that shows.The spatial light modulator of a type is 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 transmitting white.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.
The first condenser lens 13 is gathered in white light on the colour wheel 15.Motor 16 rotation colour wheels 15 are so that the white light of the each several part of colour wheel 15 (for example, part 3,4,5) through being provided by the first condenser lens 13.The second condenser lens 17 receives the light that is filtered by colour wheel 15.Light focusing after the second condenser lens 17 will be filtered is on DMD19.
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, being provided by video source 35) modulation from the light of the 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 to show image at 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 relatively short, 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 such 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 is emission of light divergently.Therefore, a big chunk from the light of led light source emission does not arrive display screen 31.This characteristics of luminescence is so that traditional led light source relative efficiency is lower.
Proposed to comprise that the array of a plurality of LED is to increase the light amount of the illumination image that is used for image projection device.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 adopts, for most of projection application, the efficient of array is still too low.Need to be used for gathering from the efficient system and method for 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 of light according to the feature luminous pattern.Comprise the lens devices gathering of at least one lens by the part of the light of described luminous pattern emission and with the light focusing of assembling, in order in described optical axis certain angle, entering described downstream part.The part that the quilt of emission of light is assembled and in described angle, enter being cooperated by collected light of downstream part, 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 according to another embodiment of the present invention the lighting unit of SLM display system, and the SLM display system comprises the led light source that white light is provided and the colour wheel that is used for filtering white light;
Fig. 4 is the more detailed calcspar of the lighting unit for the SLM 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 according to another embodiment of the present invention calcspar of lighting unit.
Embodiment
Among the embodiment in the accompanying drawings, for purpose clearly, adopt specific term.Yet the present invention is intended to be confined to the like this particular term of selection, and should be appreciated that each specific element comprises the technical equivalents thing that all move to realize similar purpose in a similar manner.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 arrange in order to use from each lighting unit 111,112,113 light along the longitudinal axis 117 and illuminate DMD194.Light is along substantially passing photoconduction 192 by the direction shown in the arrow 133.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 blue component light-receiving and the combination of lighting module 113.In a plurality of embodiment, lighting module 111,112,113 designs upper identical or similar (except color).Fig. 5 that the following describes-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 in order to 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 subsequently in connection with light offer the opening 800 of photoconduction 192.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 insert lighting modules 111,112,113 and light cube 120 between.For example, in certain embodiments, the light path between lighting module and the optical channel 192 is very short, so that is not used for 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 in the situation of the design advantage of not sacrificing lighting module.The display system that can contemplate according to another embodiment of the present invention comprises more than or is 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 for sending three primary colors.In the exemplary embodiment shown in Fig. 2, the first light source 111 comprises that be used to the led array that sends blue light secondary light source 112 comprises be used to the led array that sends green glow, and the 3rd light source 113 comprises be used to the led array that sends ruddiness.Yet, also can use other color and layout.Light from the LED that consists of 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 at least a portion that the light that is provided by X-cube 120 is provided.Be allowed through opening 800 and pass photoconduction 192 by X-cube 120 light that provide, that within incident angle A (clear illustrating in Fig. 4), incide on the opening 800.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 the display 196 such 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 so that its each mirror element is in a kind of in two kinds of different heeling conditions, namely or be in "On" state, perhaps is in "Off" state.DMD194 is configured so that only to be in the mirror element of "On" state 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 in projection surface 196 by the part of the described mirror element reflection that is in "On" state and shows image.
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 other embodiment of DMD type display system is shown in Figure 3.Display system 300 comprises an according to an embodiment of the invention lighting module 310.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.
Display system 300 comprises light optics part 344, DMD394 and projection optics part 320.In Fig. 3, light in light optics part 344 substantially along being propagated by the optical path shown in the arrow 133.Light optics part 344 comprises single lighting unit 310.Lighting unit 310 is constructed according to the embodiment of the invention shown in Fig. 4-7.Lighting unit 310 provides from the led light source to the photoconduction 392 light.In one embodiment of the invention, photoconduction 392 comprises traditional integrating rod (integrator rod).DMD394 receives the light of the outlet 850 of leaving photoconduction 392.
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 at display screen 396, eyes synthesize correct color framing with them.
The optical module that comprises lighting unit 310 and light optics part 344 arranges 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 consists of lighting unit 310.Light optics part 344, and the impact of special photoconduction 392 luminance difference between the light of axle 317 (for example, along) and the Off-axis-light so that the axle glazed thread is minimum.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 the 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 of 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 for image projection.Yet in practice, 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 large angle of ether, and can not enter photoconduction 392.According to the lighting unit 310 of the embodiment of the invention by guiding from the light of light source so that it falls within the entering angle of photoconduction 392 so that the light of waste 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 is 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.
The structure of describing shown in Fig. 4 and is hereinafter 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 Optical range from the surface of emission of light source 200 to lens 202 (point on the nearest axle)
SEP Optical interval (between putting on the nearest axle) between the lens 202 and 203 (if 203 existence)
L2 From the output of lens 203 (if present; Otherwise be 202) to the optical range in the input aperture of downstream part 220 (on the nearest axle between the point)
Total optical path length L between the opening 800 of light source 200 and photoconduction 392 TotalProvided 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 namely, 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 are 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 better performance for system 300.The embodiment of the lighting module of being contained by Fig. 5-7 is at least part of to be limited by structural parameters L1, SEP and L2.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 occurs.Described loss reduces the optical efficiency of system 300.Therefore, although more LED is provided, the brightness of imaging device 392 is sometimes also very limited.
The invention provides the higher system of efficient, this system is so that enter the light amount optimum of photoconduction 392.Higher efficient means more light and so that better exports on the whole illumination to projector (perhaps other devices).Yet, so that enter the light amount of 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 hardly the light of optical axis 301.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 discussion.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, lens 502,503 on-plane surface (convex surface) 502C, 503C 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, give fix-focus lens 502,503 plane along pointing to the direction (referring to following discussion to Table III) of the opposite direction shown in Fig. 5.
In addition, in other embodiment, lens 503 are removed fully.For example, Fig. 6 and 7 shows the second lens not at first lens (602 and Fig. 7 of Fig. 6 702) embodiment afterwards.
Lens 502 are assembled a certain amount of light.Lens 503 are convergence of rays, thereby enter photoconduction 592 with the entering angle A less than other situations.Therefore, lens 502,503 realize assembling the also function of converging ray, with the efficient of increase system 500.
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 discussion 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, lens 201,202,203 relative position are 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 in accordance with the principles of the present invention the example of the lens Part No. that is used for lens 202,203 specific embodiment.Part No. is from Edmund industry Optical Co., Ltd (Barrington, NJ).Each lens is reduced to A, B, C or D so that easier discussion Table III hereinafter.
Table II
Realize lens 202, candidate's part of 203
Lens Lens type Diameter (MM) Equivalent focal length (MM) f/# Thickness (MM)
“A” 43988 Aspherical condenser 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 at the optical axis around the reception opening 800 that enters photoconduction 392 with definitions of efficiency.
In the embodiment shown in the Table III, the plane of lens 202 is in the face of the upstream, and namely towards lens 201, and the plane of lens 203 is in the face of the downstream, namely 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
Figure G2006800566338D00091
Figure G2006800566338D00101
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 the some embodiments of the present invention according to #6 (B-A) structure, before the opening 800 of photoconduction 392, be provided with supplementary lens.
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 of 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 of light in the optical axis 10 degree angles of photoconduction 392, and provide 31% emission of light in optical axis 15 degree angles (structure #19).
In certain embodiments, lens (202) downstream part (320) provide at least 34% emission of light in optical axis (301) 15 degree angles (structure #19).
In certain embodiments, lens (202) downstream part (320) provide at least 24% in optical axis 10 degree angles, and 34% emission of 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 this first lens has the first focal length and is configured to assemble light by luminous pattern emission, and with the light assembled towards the second lens (203) transmission; And second lens, these second lens have the second long equally with the first focal length at least focal length, and are configured to the light focusing that will assemble in order to entering downstream part (220) (Fig. 4-poly-lens) within the angle (215) of optical axis (210).
In certain embodiments, the first (202) and second (203) lens jointly downstream part (220) provide at least 40% emission of light within 15 degree angles of optical axis (structure #6).
In certain embodiments, the first (202) and second (203) lens jointly downstream part (220) provide at least 30% emission of light within 10 degree angles of optical axis; 40% emission of light is within 15 degree angles of optical axis (structure #6).
In certain embodiments, the first (202) and second (203) lens jointly downstream part (220) provide at least 33% emission of light within 10 degree angles of optical axis (structure #12).
In certain embodiments, the first (202) and second (203) lens jointly downstream part (220) provide at least 33% emission of light within 10 degree angles of optical axis, 36% emission of 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, the first (202) and second (203) lens jointly downstream part (320) provide at least 20% emission of light within 10 degree angles of optical axis, 28% emission of light is within 15 degree angles of optical axis (structure #4, #16).
In certain embodiments, first lens (202) comprises 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, the second lens (203) comprise plano-convex lens, and this plano-convex lens is configured at convex surface reception 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 of light according to the feature luminous pattern; And the number percent that (b) maximizes the emission of light (from 200) of downstream part (220) use that can be shown system.Described maximization steps comprises: cooperate a part of emission of light in (b1) gathering (202) luminous pattern; And (b2) with the light focusing assembled (Fig. 5,6 lens 202, perhaps the lens 202+203 of Fig. 4) in order to respect to optical axis, for example enter photoconduction 392 within the angle A of axle 301.
In certain embodiments, described gathering and focus steps comprise a part of emission of light of gathering and utilize single lens (202) with the light focusing (Fig. 6 and 7) of assembling.
In certain embodiments, described agglomeration step comprises: utilize the first lens with first focal length to assemble a part of emission of light; And described focus steps comprises and utilizes the second lens have at least with same long the second focal length of the first focal length with the light focusing of assembling.
Above-described embodiment only is example and is not considered to restriction of the present invention.The description of described embodiment is used for the scope of explanation rather than restriction 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 and special describe different here.

Claims (10)

1. a display system comprises: light emitting diode (LED) light source, light accumulation unit and light projecting cell; Described smooth accumulation unit comprises the first optical element, the second optical element and elongated photoconduction at least, and described photoconduction comprises the opening that is limited by entering angle, and described smooth accumulation unit is characterised in that:
Described the first and second optical elements and described photoconduction are aimed at along common axle;
Described the first optical element is coupled to described the 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 the second optical element is coupled to described opening with at least a portion from the light of described the first optical element within described entering angle;
Described the second optical element and described light source are along described axle partition distance L1;
Described opening and described the second optical element are along described axle partition distance L2;
Wherein said the first optical element comprises collimation lens, described the second optical element comprises non-spherical lens, described entering angle is no more than 15 degree with respect to described axle, and at least a portion of the total light that wherein sends from described light source is provided to described opening via the first optical element and the second optical element within described entering angle.
2. display system as claimed in claim 1, wherein said entering angle is no more than 10 degree with respect to described axle.
3. optical module of be used for assembling the light that sends from led light source, described optical module comprises:
The first optical element, this first optical element is couple to described light source around described common optical axis;
The second optical element; With
Elongated photoconduction, described photoconduction comprises the opening that is limited by entering angle, the light of gathering is provided to described opening,
Wherein said LED and described opening are aimed at and distance of separation (L on described common optical axis along the common optical axis of light source T), this second optical element is arranged between the first optical element and the described opening around described common optical axis, and separates at least distance of 7.4mm (L1) with described light source,
Described the second optical element has the following characteristics parameter: thickness (t1) is 8mm at least, the effective focal length of 13mm (EFL1) at least;
Described module is characterised in that the efficient (E) at least 15% that is coupled to the light of described opening within described entering angle;
Wherein entering angle (A) is in the 10-15 degree.
4. display system as claimed in claim 1, wherein said light source comprises at least three light emitting diodes.
5. display system 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. display system as claimed in claim 1, wherein said light source comprises white light source, and described system also comprises the rotary color element, and this element is set to receive described white light and provide colorama to Digital Micromirror Device from described light source.
7. display system as claimed in claim 1, the light that wherein is coupled to described opening within described entering angle are the ten Percent of total light of the light that sent by described light emitting diode at least.
8. display system as claimed in claim 1, the light that wherein is coupled to described opening within described entering angle are the ten Percent five of total light of the light that sent by described light emitting diode at least.
9. display system as claimed in claim 1, the light that wherein within described entering angle, is coupled to described opening be at least the light that sent by described light emitting diode total light 20 percent.
10. one kind provides the method for light to display system (100,101),, the method comprises:
A) provide the light that sends (200) according to the feature luminous pattern as light source; With
B) can be shown the number percent that system utilizes in the described light that sends of maximization, described maximization steps comprises the cooperation of following step:
B1) assemble the part (202) of the light that light source sends by the first optical element; With
B2) by the second optical element with the light focusing of assembling,
Wherein, a photoconduction is aimed at along described axle jointly with described the first and second optical elements;
Described the first optical element is coupled to described the second optical element with respect to the light source setting with the major part of the light that will be sent by described light source;
Described the second optical element is coupled to from the light of described the first optical element at least a portion the opening of entering angle restriction within the entering angle of described photoconduction;
Described the second optical element and described light source are along described axle partition distance L1;
Described opening and described the second optical element are along described axle partition distance L2;
Wherein said the first optical element comprises collimation lens, and described the second optical element comprises non-spherical lens, and described entering angle is no more than 15 degree with respect to described axle.
CN2006800566338A 2006-12-15 2006-12-15 Illumination module and method Expired - Fee Related CN101563637B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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

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EP2095166A1 (en) 2009-09-02
JP5537950B2 (en) 2014-07-02
WO2008073105A1 (en) 2008-06-19
KR20100014266A (en) 2010-02-10
CN101563637A (en) 2009-10-21
MX2009005746A (en) 2009-06-08

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