CN1401087A - Collimator lenses - Google Patents
Collimator lenses Download PDFInfo
- Publication number
- CN1401087A CN1401087A CN01804850A CN01804850A CN1401087A CN 1401087 A CN1401087 A CN 1401087A CN 01804850 A CN01804850 A CN 01804850A CN 01804850 A CN01804850 A CN 01804850A CN 1401087 A CN1401087 A CN 1401087A
- Authority
- CN
- China
- Prior art keywords
- lens
- light
- collimator
- screen
- aperture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
-
- 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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/027—Mountings, adjusting means, or light-tight connections, for optical elements for lenses the lens being in the form of a sphere or ball
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
A collimator comprises a screen (1) defining an array of apertures (2). A convex lens is associated with each aperture, and a transparent region (5) is positioned between the screen and the lens to provide a spacing therebetween. The surface (4) of the screen which faces the lenses is light absorbing.
Description
The present invention relates to the field of collimator.
Have wherein and must adopt the multiple use of a collimated light source, and proposed multiple different colimated light system so that such source is provided.As will be recognized, have and to have the collimation of special good degree so that some purposes that total system is operated effectively it.
An a kind of like this example of system is a photoluminescence LCD system.In a kind of like this system, to wish to be provided at illumination in indigo plant and/or the ultraviolet light range to the modulation liquid crystal device, this illumination light has highly collimation, probably positive and negative 15 ° or littler (as following the definition).Recognize that therefore such requirement means that a kind of like this display system needs expensive and complicated collimating element always, this collimating element efficient is also lower.This has caused having this system than the high power consumption of general hope, and the overall cost that increases this system.
Providing of a kind of low-cost collimating element is provided in the present invention, and this cost collimating element provides greater efficiency, and providing of well collimated degree can be provided, thereby it can be used in the system of above-mentioned type.
According to having the invention provides a kind of collimator, it comprises:
A screen limits an array of apertures;
Convex lens, relevant with each aperture; And
A transparent region is positioned between screen and the lens, and so that a space to be provided between it, wherein the screen surface facing to lens is light absorption.
Lens can be plano-convexs.
Transparent region can be formed by a single screen of transparent polymer or glass material, and can have additional or formation screen thereon.
The surface that deviates from lens can be reflexive.Transparent region can so form, thereby it and lens are whole.
Lens can be hexagon or rectangle, so that a closelypacked lens arra is provided.A light absorption baffle plate can be provided between each lens, and can all extend in the transparent region, may contact screen, and away from transparent region.
The present invention also provides a kind of system that is used for producing collimated light, this system comprises the collimator of a above-mentioned type that combines with a light source, this light source comprises at least one light producing component and peripheral reflection case, and a surface energy of case is formed by the screen surface that deviates from lens.In a kind of like this system, the light source that produces can be created in the light in the 350-420nm scope.
The present invention also provides a kind of light of the above-mentioned type that comprises to produce the photoluminescence LCD system in source.
The present invention can provide a kind of system that is used for producing collimated light, and wherein to stride across in the zone of leaving a certain distance in source be constant to light intensity.This grade realization that departs from by weakening collimation and allowing to leave each collimation unit.This on average strides across the intensity in whole zone.For the use in the display device such as photoluminescence LCD, the advantage that produces even light intensity is, realizes eyes are had the image of constant luminance when even modulation.
Referring now to accompanying drawing an example of the present invention will be described, wherein:
Fig. 1 is the side cross-sectional schematic of an example of the present invention;
Fig. 2 is the plane and the side cross-sectional schematic of the illuminator that can be used in combination with the example among Fig. 1;
Fig. 3 represents the operation of the key element of the example of Fig. 1 in use;
Fig. 4 is a curve map, shows the level of collimation of realizing in example of the present invention;
Fig. 5 represents selectable lens configuration and overlapping showing;
Fig. 6 is the cut-open view of alternate embodiment of the present invention; And
Fig. 7 is the cut-open view that can use photoluminescence LCD of the present invention.
With reference to Fig. 1, a kind of collimator according to the present invention has a screen 1 that limits an array of apertures 2.Screen 1 has a reflectance coating 3, and has a kind of light absorbing material 4 on another surface on a surface.The benefit of this customized configuration is discussed below.
Adjacent screen 1 location be a hyaline layer 5, this hyaline layer 5 has significantly the refractive index greater than air, and is transparent and by being that transparent glass or polymeric material forms under its wavelength that device is being operated down.If for example adopt collimator 15 in photoluminescence LCD system 20, then zone 5 should be transparent for the light of 350-420nm wavelength typically.Adjacent transparent region 5 location be lens 6 relevant with each aperture 2.Lens 6 and transparent region 5 all should have high as far as possible refractive index.In some cases, owing to commercial consider, the refractive index of lens 6 is less than medium 5.This guarantees that a suitable narrow light cone sees through medium 5 to lens 6, makes lens unit packing maximum, and therefore makes the efficient maximum.
Transparent region 5 can be formed by the individual plates of crossing and pass all apertures 2 in the screen 1.Therein under the situation that screen 1 to 100 μ m magnitude is thick, the surface of the transparent region 5 adjacent with aperture 2 can be outstanding by the aperture, thereby its surface can be concordant with the reflecting surface of screen 1.The part of the transparent region 5 that exposes by aperture 2 can be handled with dielectric coat, thereby the wide-angle light that is incident on the place, aperture reflects back in the light case 12.Because the collimation unit is receiving a narrower light cone now,, increase efficient thus so it can be placed by more close its adjacent cells.This increase must with respect to pass the aperture reduce for the first time light by and balance.The array of lens 6 also can be formed by the veneer of crossing all apertures 2 and transparent region 5.No matter these unit 5,6 form respectively or by veneer, an external baffle 9 can be provided between each lens 6, leaves colimated light system 15 or feeding adjacent lens and leaves then so that prevent wide-angle light.Therein under the situation that transparent region 5 is formed by each unit, interior panelling 8 can be provided between the adjacent cells, so as to reduce directly from aperture 2, from the curved surface of lens 6 to surperficial 1 reflected back or be refracted into the effect of the wide-angle light of lens after leaving adjacent lens.
How the collimator 15 of Fig. 2 presentation graphs 1 can be as the part of light illuminating unit 12.In light illuminating unit 12, provide to wish that operative wavelength provides one or more light sources 10 of light.These light sources are surrounded by a case 13, and case 13 scribbles reflecting material on the surface within it, thereby reflection is left light case 13 from the light of light source 10 up to its 2 place, aperture in screen 1.Light passes transparent region 5 and lens 6 then, and collimation is to provide a collimated light source.In order to increase a kind of like this efficient of light source, obviously, when being provided on its optical receiving surface, certain benefits is arranged, thereby can not pass through the light reflected back case 13 in aperture 2 immediately, so that pass aperture 2 later on to the screen 1 that has a reflectance coating 3.
Fig. 3 shows can think a plurality of design parameters (in bidimensional) relevant with overall performance of the present invention.To recognize, optimize the design of collimator for every kind of concrete purposes.This optimizing process significantly is subjected to the influence of following parameter:
Cellar area
Cellar area is to form each area of the collimating aperture/lens element of array.This unit is being hexagonal for round lens in shape, because they can not be set into decorative pattern exactly.Striding across this array has the variation of light intensity.Can make the unit little as to be enough to guarantee that human eye can not feel the variation of brightness.Accompany therewith, in the PL-LCD device, can increase collimator and separate with fluoroscopic, up to change for the brightness of a given unit size can not by human eye perceives to.Thereby the unit size of selecting depends on the degree of depth of demonstration and watches the distance (for example, but range of receiving can be 1 to 10mm) of display from it.
Aperture unit area/unit ratio
This is the good single order measurement of system effectiveness, because its expression transmits the number percent that is incident on the light on the collimator downside.Some of this light and recover more catoptrical because the absorption top side of aperture plate loses later on.Present a kind of efficient that requires of definition, this allows by the cellar area of selecting and aperture area/cellar area than calculated hole diameters area (otherwise can define the collimation of requirement, and energy modelling aperture area is to realize this point).An example is in 5% to 20% scope.
Aperture/lens radius compares a/l
The radius in aperture can be calculated by its area, and for example, the end radius of round lens is limited by the maximum radius that is assemblied in the cellar area that is used for the design that wherein lens can be not overlapping.In this example, the area of lens is 91% (being hexagonal area) of cellar area.So radius of lens
So can calculated hole diameters/lens radius ratio.It is for example, typical that the aperture/the lens radius ratio is 30% to 40%.
The vertical depth d of transparent medium 5
Define the d that separates of lens " end " and aperture plane now for the largest refractive index of medium 5.Main consideration is the main set of leaving the solid angle of the light in aperture.Must be enough to collect under the situation of all light just greatly at the bottom of the lens therein, the vertical depth of transparent medium 5 is defined as t, wherein:
t＝(l-a)/2tanθ
t
Yet, can preferably increase d and arrive, and can not collect all light greater than t, remaining light will be incident on the vertical baffle 8.This will improve collimation, but reduce efficient.Reduce d on the contrary to having limited influence, reduce efficient simultaneously less than the t collimation.In this case, cellar area can reduce with corresponding efficiency gain.In this example, hardware d=2mm, and be slightly smaller than t.
The refractive index n of medium 5 and lens 6
5And n
6
For in order to be made the material of requirement and cost consideration domination, always make the refractive index maximum.This makes the solid angle minimum of light simply, and reduces unit size, increases efficient thus.To have to have the commercial benefit that reduces refractive index (cheap and easy to manufacture), and this must with the efficiency gain balance with high index of refraction.Opposite with medium 5, by the refractive index that reduces lens have for efficient than small loss, because this can not increase the solid angle that light leaves the aperture.Typical case subvalue is 1.49 to 1.522.
The definition S of curved lens surface
Aspheric curvature preferably can be optimized, and preferably for spherical lens, although can use spherical lens in some cases.This design is by avoiding optimizing by the local light that is incident on the curved lens surface with big (near-as to plunder and penetrate (near-glancing)) angle, because this will reduce the catoptrical number percent at this compact medium/air interface place.
The degree O that lens are overlapping
Allowing the overlapping place of lens, reduce unit size, and more light is by the aperture of greater density.In addition, will reduce redundant area, increase efficient at the lens infall.This will with increase each lens infall overlapping, to reduce efficient be cost, because some light that are incident on the lens circular base will enter adjacent lens, if perhaps adopt baffle plate then lose.
Baffle plate
These absorb following light:
1. being incident on the light that the outside at the bottom of the lens comes from its corresponding aperture is absorbed by interior panelling.
2. absorb owing to the scattered light of the defective in transparent medium 5 top side by interior panelling, external baffle and aperture plate.
3. be incident on the lens surface and do not see through but the light of reflection is absorbed by the top side of inside and outside baffle plate and aperture plate.
Dark external baffle can be used for increasing collimation, but this is a kind of very inefficient methodology.
Preferably the collimate optimization of instrument, with produce the level of collimation of wishing (for example for the PL-LCD purposes ± 8 ° to 40 °).The requirement of emission higher proportion light is arranged, thereby improve system effectiveness, rather than only concentrate on generation normally or on the almost normal light, the uneven density of demonstration this will cause striding across after.
In an example, the circular aperture 2 of diameter 1.71mm is used in the aperture that has produced, and etches in the 0.25 μ m corrosion resistant plate to form screen 1.This strip has a reflecting surface (facing to light source) and a blacking surface.Round lens 6 has the diameter of 5mm, causes representing the aperture area in 11.7% aperture 2 of lens 6 total areas or 10.6% (being made up of a plurality of cellar areas) of collimator downside area.The vertical depth t of transparent region 5 is defined as 2mm.Lens 6 and transparent region 5 be all by the glass manufacturing, and have 1.522 refractive index.There is not baffle plate 8,9 to be included in this design.For this configuration, surpass critical angle θ z, cause some light to be incident on the outer peripheral outside of lens 6.
The level of collimation that reaches is illustrated in the curve among Fig. 4.Collimation angle is defined as the level that wherein reaches 50% relative intensity in these examples.
Fig. 5 represents to select lens 6 configurations.Each of lens 6 and transparent medium Unit 5 can have hexagon, square or rectangular shape in planimetric map, so that best packing is provided in the collimator array.Round lens 6 in Fig. 5 a is used in the example configuration.Can select hexagon lens (Fig. 5 b) realizing that 100% covers, and therefore allow light to be incident on to provide the not outside of end of the round lens in the example.
The pin hole that produces collimated light is known with the use of relevant convex lens 6.Yet the employing of pin hole causes the very collimator 15 of poor efficiency, because the major part of illumination light is stopped by the screen 1 that forms pin hole.Thereby the present invention adopts much larger than the aperture 2 of thinking pin hole, aperture 2 for example form screen total surface area 11.7%, this screen forms them.Yet the raising of this efficient has remarkable defective aspect the quality of collimated light.Adopt therein under the situation in aperture 2, any position on lens 6 can be only from single angle, but receives light from an angular range.The most of discrete light line source that leaves normal is 2 edge in the aperture, passes the axis of lens, and is incident on the surface of lens 6 at a some place.This point also receives the more approaching normal light from other end in aperture 2.The boundary that these two kinds of extreme rayses are represented the angle of light degree simultaneously planar and becomes best scope light to be refracted to its normal in the power tradeoffs on lens 6 surfaces at this some place.This will cause lens 6 to stride across the above-mentioned compromise of its surperficial optical power.This compromise level of collimation that reduces of causing makes light discrete to big incident angle, and this can make the collimation configuration not be suitable for some purposes that wherein too discrete luminous energy causes problem.
Fig. 6 shows an additional embodiments of the present invention.Lens 6 ' form by glass spheres, and be arranged in the preform unit that has been designed to the effect of light absorption interior panelling.This unit can be formed by metal (for example aluminium), and can have a blacking coating by the processing of the direct surface such as anodic oxidation or by japanning.Reflecting surface can be by realizing on the downside that the perforated board that has white coating is appended to the preform unit.
Fig. 7 shows how a collimator 15 can be used in the system that has photoluminescence LCD20.The figure shows of using and to select lighting unit 12 ' and display system 20 with collimator 15.This display system comprise 21,23, LCD22 of two polariscopes, visible catoptron lamination 24, a video screen 25 and an anti-dazzle wave filter 26.A kind of like this system is described in patent publications no.WO95/27920.
In such photoluminescence LCD purposes 20, discrete significantly light quantity can influence the contrast that reaches in LCD22, demonstration can not be worked.Yet, for the present invention, providing of the sorbent surface on the screen 14 very unexpected overcome with light under big incident angle produce a plurality of of relevant problem.The employing of aperture 2 rather than pin hole is by causing from the surface of lens 6 light the wide-angle incident light of significance degree to screen 1 reflected back, this light is then from screen 1 reflection, and passes lens 6 and return with big incident angle.Under situation of the present invention, providing of light absorbing material 4 prevents that this discrete reflectance from passing lens 6 reflected backs on screen 1.The amount that this reduces by the big incident angle light of collimator 15 emissions increases the average degree that collimates, and still keeps high-level efficiency simultaneously.Auxiliary providing of baffle plate 8,9 can further be improved this effect.
Yet, as discussed above, may wish to utilize a certain discrete lighting level, to guarantee that striding across display realizes the constant light intensity degree.
Claims (13)
1. collimator comprises:
A screen limits an array of apertures;
Convex lens, relevant with each aperture; And
A transparent region is positioned between screen and the lens, and so that a space to be provided between it, wherein the screen surface facing to lens is light absorption.
2. collimator according to claim 1, wherein transparent region is formed by monolithic glass or polymeric material,
3. collimator according to claim 2, wherein transparent region has additional or formation screen thereon.
4. according to the described collimator of any above claim, the screen surface that wherein deviates from lens is reflexive.
5. according to the described collimator of any above claim, wherein form transparent region, thereby it and at least one lens are whole.
6. according to the described collimator of any above claim, wherein lens have the plane surface of hexagon or square or rectangle, so that a closelypacked lens arra is provided.
7. according to the described collimator of any above claim, further comprise a light absorption baffle plate that is provided between the adjacent lens.
8. collimator according to claim 7, wherein baffle plate extend in the transparent region, away from transparent region or both.
9. according to the described collimator of any above claim, wherein the aperture has the surface area of screen at least 8%.
10. according to the described collimator of any above claim, wherein the aperture has formation dielectric lamination thereon.
11. a system that is used for producing collimated light, comprise one combine with a light source according to the described collimator of any above claim, this light source comprises at least one light producing component and peripheral reflection case.
12. system according to claim 11, wherein light generation source produces the light with ultraviolet or visible blue wavelength 365nm to 400nm.
13. one kind comprises the photoluminescence LCD system according to the system of claim 11 or 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0030410.5A GB0030410D0 (en) | 2000-12-13 | 2000-12-13 | Collimator |
| GB0030410.5 | 2000-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1401087A true CN1401087A (en) | 2003-03-05 |
Family
ID=9905011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01804850A Pending CN1401087A (en) | 2000-12-13 | 2001-12-05 | Collimator lenses |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2004515816A (en) |
| KR (1) | KR20020086522A (en) |
| CN (1) | CN1401087A (en) |
| AU (1) | AU2002220891A1 (en) |
| GB (1) | GB0030410D0 (en) |
| WO (1) | WO2002048754A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317828A (en) * | 2009-02-13 | 2012-01-11 | 埃赛力达科技Led解决方案有限公司 | Led illumination device |
| CN114424110A (en) * | 2019-08-30 | 2022-04-29 | Pcms控股公司 | Creating 3D multiview displays with elastic optical layer buckling |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007002797A2 (en) * | 2005-06-29 | 2007-01-04 | Reflexite Corporation | Method and apparatus for aperture sculpting in a microlens array film |
| US20150096608A1 (en) * | 2013-10-08 | 2015-04-09 | Atomic Energy Council - Institute Of Nuclear Energy Research | Fixing apparatus for ball lens |
| CN211857087U (en) * | 2020-02-24 | 2020-11-03 | 宁波激智科技股份有限公司 | Interference reducing collimation film |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924356A (en) * | 1988-12-07 | 1990-05-08 | General Electric Company | Illumination system for a display device |
| US5822125A (en) * | 1996-12-20 | 1998-10-13 | Eastman Kodak Company | Lenslet array system |
| GB9800668D0 (en) * | 1998-01-13 | 1998-03-11 | Nashua Corp | Enhanced microlens screens |
-
2000
- 2000-12-13 GB GBGB0030410.5A patent/GB0030410D0/en not_active Ceased
-
2001
- 2001-12-05 WO PCT/GB2001/005377 patent/WO2002048754A1/en active Application Filing
- 2001-12-05 JP JP2002550006A patent/JP2004515816A/en not_active Withdrawn
- 2001-12-05 KR KR1020027010437A patent/KR20020086522A/en not_active Application Discontinuation
- 2001-12-05 AU AU2002220891A patent/AU2002220891A1/en not_active Abandoned
- 2001-12-05 CN CN01804850A patent/CN1401087A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317828A (en) * | 2009-02-13 | 2012-01-11 | 埃赛力达科技Led解决方案有限公司 | Led illumination device |
| CN114424110A (en) * | 2019-08-30 | 2022-04-29 | Pcms控股公司 | Creating 3D multiview displays with elastic optical layer buckling |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020086522A (en) | 2002-11-18 |
| GB0030410D0 (en) | 2001-01-24 |
| JP2004515816A (en) | 2004-05-27 |
| AU2002220891A1 (en) | 2002-06-24 |
| WO2002048754A1 (en) | 2002-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1268970C (en) | Illumination device for plane display device | |
| CN1303462C (en) | Optical slice and LCD device therewith | |
| CN1266529C (en) | Backhight unit | |
| US7883238B2 (en) | Light collimation and mixing of remote light sources | |
| CN1303459C (en) | Illumination device and LCD device | |
| CN101430072A (en) | Assembled uniform surface light source | |
| CN1888959A (en) | Prism sheet and liquid crystal display device having the back light unit | |
| TW201331646A (en) | Illumination device and display device having the illumination device | |
| CN1808728A (en) | Mirror and homogeneously luminous LED utilizing the mirror | |
| CN1482502A (en) | Liquid crystal display device | |
| CN1153994C (en) | Prismatic light beam homogenizer for projection displays | |
| CN1844988A (en) | Assembled uniform area light source | |
| US20100038663A1 (en) | Led light recycling for luminance enhancement and angular narrowing | |
| CN1401087A (en) | Collimator lenses | |
| CN1920636A (en) | Prism sheet and backlight unit employed in a liquid crystal display | |
| CN1836178A (en) | Backlight device | |
| CN101059222A (en) | Light guide and line illuminator | |
| KR101201306B1 (en) | Back light unit | |
| CN115113321B (en) | Lighting device | |
| CN113654008B (en) | White light illuminating device | |
| CN1836469A (en) | EL device, manufacturing method of same, and liquid crystal display device using EL device | |
| JP4349741B2 (en) | Illumination device having a light guide plate | |
| CN1836468A (en) | EL device, manufacturing method of same, and liquid crystal display device using el device | |
| CN1836471A (en) | EL device, manufacturing method of same, and liquid crystal display device using EL device | |
| CN218069224U (en) | Backlight structure and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |