CN101896843A - Light guide device, illumination device with a light guide device of said kind and method for the production of a light guide device of said kind - Google Patents
Light guide device, illumination device with a light guide device of said kind and method for the production of a light guide device of said kind Download PDFInfo
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- CN101896843A CN101896843A CN2008801204757A CN200880120475A CN101896843A CN 101896843 A CN101896843 A CN 101896843A CN 2008801204757 A CN2008801204757 A CN 2008801204757A CN 200880120475 A CN200880120475 A CN 200880120475A CN 101896843 A CN101896843 A CN 101896843A
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- light guide
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- island
- reflection
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- 238000000034 method Methods 0.000 title 1
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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
- G02B6/0001—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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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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
- G02B6/0001—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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
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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
- G02B6/0001—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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a light guide device (10; 70, 72, 74, 76, 78, 80) having a light guide element (12), which is delimited by a first main surface (14) and a second main surface (22) that is spaced parallel to the first main surface, and having a reflection device (24), which is arranged on the side of the second main surface (22) of the light guide element (12) and with which light can be reflected in at least the direction of the inside of the light guide element (12). The reflection device (24) comprises material islands (26) made of a preferably transparent reflective material. The invention further relates to an illumination device (42; 100) comprising a light guide device (10; 70, 72, 74, 76, 78, 80) of said kind and to a method for the production of the light guide device (10; 70, 72, 74, 76, 78, 80).
Description
Technical field
The present invention relates to a kind of light guide as described in the preamble, a kind of light fixture as described in the preamble and a kind of method as described in the preamble according to claim 25 according to claim 22 according to claim 1.
Background technology
The light guide that starts described type for example uses in light fixture, described light fixture will be a flat design for technology and/or aesthetic reasons as far as possible, and wherein the effective light/work light (Nutzlicht) that produces by this light fixture wants first interarea of main photocon via light guide to launch.
Start described light guide and for example use in the background illumination of the liquid crystal panel of LCD screen, described LCD screen generally is known as lcd screen.Lcd screen particularly is used owing to the structure of its flat design gets more and more.
This class lcd screen comprises a liquid crystal panel, and the light fixture that this liquid crystal panel utilization starts described type throws light on.Employed luminescent device needs additional parts usually, and as hole reverberator, Fresnel Lenses (Fresnel-Linse) and (mostly under the situation) a plurality of diffusion light filters, they are arranged between liquid crystal panel and the luminescent device.
But this structure often has adverse effect for contrast and the brightness of watching the image that can discern on the side in lcd screen.The radiation of being sent by light fixture is before arriving liquid crystal panel, and its intensity has weakened about 10% owing to spread light filter.The influence of hole shade/aperture mask (Lochmaske) is also bigger.The radiation of being sent by light fixture is had an appointment and 25%～35% is absorbed by the hole shade, therefore only has corresponding less light deal can arrive the liquid crystal panel that will throw light on.In addition, because the hole shade also causes disadvantageous interference effect.
For remedying this interference effect and, being provided with Fresnel Lenses for improving the contrast that can reach at the image that watching of lcd screen discerned on the side.Yet Fresnel Lenses also can make in addition can see screen, therefore can know that still identification is diminished by the angle of the image of this screen generation.
Therefore, in guiding device and light fixture, aspect the background illumination of lcd screen, people wish to save above-mentioned correcting part substantially and guiding device and light fixture still are suitable for use as background illumination in the LCD screen, have good luminosity and flat the structure.
In addition, also mention the characteristic of flat design more and more at the light fixture of the light fixture form that is used for the illumination of room lighting or outdoor environment, because can reach pleasing optical effect by this flat design.The light fixture of known flat design has passive luminophor and primary light source.
Passive luminophor has photoconductive property, however not additional active/can not send light under the situation of the primary light source that is activated.With flat design irrespectively, wish that passive luminophor is not sending effective light under the situation than the hard intensity loss by the light of light emitted.
Yet desirable flat configuration can not be coordinated mutually with the needed luminosity of light fixture usually.
In---wherein be provided with a primary light source, the light of described primary light source is injected/is coupled in a plurality of passive luminophor, and described passive luminophor itself sends effective light---, wish usually: described passive luminophor designs flatly at light fixture.In addition, the passive luminophor in this light fixture should be able to send effective light via sizable surf zone with desirable intensity, thereby also can utilize single active primary light source to illuminate the big interior space and/or wide outdoor environment zone.
That is wish such light guide: described light guide can be propagated the light of injecting in the described light guide on the one hand on long distance, can send the effective light with high light output/luminescence efficiency on the other hand.
For example, improved the light output of light guide by reflection unit by reflexing in the photocon equally via the light that second interarea of photocon penetrates and described luminous energy being left as effective light first interarea via described photocon.
In known light guide, described reflection unit for example is designed to the form of reflective film, and described reflective film is applied on second interarea of photocon by plane earth.
The length of stroke---luminous energy is in conduction on the trip and can send the effective light with sufficient intensity by light guide behind the trip---is relevant with the structure of photocon.Effectively light intensity is generally along with the distance with light source increases and reduces widely.
Summary of the invention
Therefore, consider above-mentioned design, the objective of the invention is: realize a kind of light guide that starts described type, the photoconductive property of wherein said light guide is improved, and described light guide can send effective light with good efficient.
Described purpose realizes by the light guide with the feature that provides in claim 1.
By the material island that is formed by reflecting material is set, can realize the good homogenising and the good luminosity of light.Improved the photoconductive property of described light guide in addition, second interarea along photocon conducts to next material island from a material island under the situation of too much loss of strength not having because light is by reflected energy.Yet at this, also total some light obtains intensity distributions comparatively uniformly thus towards the internal reflection of photocon in photocon.
Term " material island " can be regarded as the zone that is formed by reflecting material, and described zone directly is not connected with adjacent materials island corresponding, that formed by reflecting material.
Described material island can be provided with uneven distribution, so that offset the negative optical effect that occurs in periodicity/regular texture.
But described material island also can be favourable as being provided with described in the claim 2.
The special confirmation advantageously selected according to each described reflecting material in the claim 3 to 5.
At this advantageously, as described in the claim 6, described reflection grain is distributed in the carrier material, and described carrier material itself can be selected according to claim 7 or 8.
If good reflection efficiency then can be realized as being provided with in described material island described in the claim 9.Can further advantageously improve the reflex and the photoconduction effect of described light guide by measure according to claim 10.
Aspect manufacturing technology, design proposal according to claim 11 is favourable.
If described light guide, then can form decorative pattern or information pattern as designing described in the claim 12 and can viewed person's identification mode reproducing described pattern.Described pattern can be black and white or colored.Such light guide for example can use in Warning Mark or ornament lamp.
If at the bottom of the described reflector substrate as described in the claim 13, being provided with, then maintain a gap that forms the photoconductive channel system between at the bottom of second interarea of the material island that forms by reflecting material, described photocon and the reflector substrate, via described gap, the light that is reflected by the material island can also conduct by second interarea along described photocon on bigger distance.At this, at the bottom of the described reflector substrate and between the photocon as being favourable in the distance described in the claim 14.
Measure according to claim 15 has realized the reflex of improving.For the scraps of paper according to claim 15, as being proved to be favourable at the weight per unit area described in the claim 16.
Can improve the efficient of described light guide once more by measure according to claim 17.
Described material island looks up in the side towards second interarea of described photocon and can have different and particularly as the exterior contour described in the claim 18.
Have as at the radical length described in the claim 19 if described material island looks up in the side towards second interarea of described photocon, then can realize the good efficiencies of described light guide.
Under the situation suitable of the distance between two material islands, realizing of described light guide with the distance that in claim 20, provides in uniform efficient on the length of photocon.
Match with the material island that forms by reflecting material, particularly be proved to be favourable by the photocon of making at the material described in the claim 21.
The present invention also aims in addition: realize a kind of light fixture that starts described type, its light output is improved.
This realizes by having at the light fixture of the feature described in the claim 22.By the high-level efficiency of described light guide, the luminous energy that is produced by luminescent device is transformed into effective light effectively.This light fixture can be used for lcd screen liquid crystal panel background illumination or with act on room lighting or outdoor environment the illumination independently luminescent device.
At this, be proved to be particularly advantageous and be, by the light of described luminescent device emission with as in light guide as described in the methods described in the claim 23 are injected.
Can realize a kind of light fixture by measure according to claim 24, its primary light source can be effectively used to illuminate interior zone or perimeter away from each other.
The objective of the invention is in addition: a kind of method is provided, can makes above-mentioned light guide in an advantageous manner by described method.
Described purpose realizes by method according to claim 25.Also and then make described photocon and described substrate laminated in the substrate by the material island at first is applied to, but intermediate storage has been equipped with the substrate and the just correspondingly cutting and the use when needed on material island.
If described substrate designs as providing in claim 26, then described substrate can be handled flexible especially and then well.
The described bonding agent of identity basis claim 27 is favourable in practice.
The possibility of making Warning Mark or ornament lamp is disclosed by measure according to claim 28.By the layout (structure) of described material island on bright substrate or bright material, provide possible image in advance according to claim 29.If as described in claim 30, described printing figure message itself has reproduced a black and white or colored image, has then realized bigger variation.
In having the light fixture of light guide, can be by the combination results decorative pattern or the information pattern that are fit on printing figure message and material island., according to described luminescent device work whether the beholder can see different images, because only the material island is luminous when luminescent device activates.In the view of the beholder, it is dark not having the zone on material island to compare with luminous material island.In the time of by day, described printing figure message is in sight just as normal printing film.It is very big to design leeway (Gestaltungsspielraum) thus.
In claim 31, described and a kind of the material island has been applied to described suprabasil favourable mode.
Be proved to be advantageously: described substrate is applied on the photocon according to claim 32.
Description of drawings
Set forth embodiments of the invention in more detail by accompanying drawing below.Shown in it:
Fig. 1 illustrates the sectional view of the light guide with the material island that is formed by reflecting material;
Fig. 2 illustrates the sectional view of cutting open along the line II-II among Fig. 1 according to the light guide of Fig. 1, and wherein said material island has circular exterior contour;
Fig. 3 illustrates the sectional view corresponding to Fig. 2 of the light guide of more correcting one's mistakes, and has foursquare exterior contour on material island described in this light guide of more correcting one's mistakes;
Fig. 4 illustrates the sectional view corresponding to Fig. 2 of another light guide of more correcting one's mistakes, and in this light guide, described material island has circular exterior contour again, has bigger radical length and bigger distance to each other yet compare described material island with Fig. 2;
Fig. 5 illustrates the sectional view corresponding to Fig. 2 of another light guide of more correcting one's mistakes, and in this light guide, the material island is to having opposite semicircle exterior contour;
Fig. 6 illustrates the sectional view corresponding to Fig. 2 of another light guide of more correcting one's mistakes, and in this light guide, described material island is designed to the rib shape;
Fig. 7 illustrates the sectional view corresponding to Fig. 2 of another light guide of more correcting one's mistakes, and in this light guide, described material island has the rectangular outer profile;
Fig. 8 illustrates the sectional view corresponding to Fig. 2 of another light guide of more correcting one's mistakes, in this light guide, described material island has oval-shaped exterior contour, and described oval exterior contour is equivalent to two semicircular exterior contours that be spaced apart from each other, that connect by straight line;
The sectional view that Fig. 9 illustrates the lighting unit of the light guide that comprises Fig. 1 and is installed in the liquid crystal panel on this lighting unit;
Figure 10 illustrates the light fixture with a plurality of light guides;
Figure 11 illustrates the sectional view of Warning Mark, and described Warning Mark comprises the light guide of Fig. 1, has used in this light guide at the bottom of the reflector substrate of printing.
Embodiment
At a light guide 10 shown in Fig. 1 and Fig. 2, described light guide 10 comprises that one is flat and optical plate 12 is as photocon uniformly basically, and described optical plate is made by acrylate glass/organic glass transparent, that have optical characteristics (Acrylglas).Also can use photocon 12 with shape different with flat geometric configuration.Optical plate 12 can also by another kind can allow material that light evenly sees through, for example make by glass or epoxy resin.Optical plate 12 is preferably bright and clean, no streak and bubble-free.
On this side of second interarea 22 of optical plate 12, light guide 10 comprises reflection unit 24.Described reflection unit 24 is used for: light that second interarea via described optical plate leaves this optical plate is distributed equably along second interarea 22 of this photocon 12, in addition partly towards the internal reflection of optical plate 12, so as to improve light guide 10 leave the output/efficient of effective light of optical plate 12 via first interarea 14 of optical plate 12.
The reflecting material on material island 26 is preferably translucent or transparent.Can also mix pigment in having the reflecting material of reflection grain in case of necessity, its application in coloured glass, acrylics or other plastics is the same.
In Fig. 1 and Fig. 2, only a material island 26 has Reference numeral.Between material island 26, remain with the zone that does not have reflecting material.
As in Fig. 2 as can be seen: material island 26 looks up in the side towards second interarea 22 of optical plate 12 and has circular exterior contour.
On the side away from second interarea 22 of optical plate 12 on material island 26, contact at the bottom of the reflector substrate of material island 26 and the white scraps of paper 28 forms.Second interarea 22 by material island 26 and optical plate 12 at the bottom of the described reflector substrate keeps certain distances, thereby does not contact with described second interarea 22 at the bottom of the described reflector substrate.By this way, between second interarea 22 of the outside surface 30 towards optical plate 12 of the scraps of paper 28, optical plate 12 and material island 26, form photoconductive channel system 32, also will inquire into described photoconductive channel system 32 below in more detail.
The distance between second interarea 22 of the white scraps of paper 28 and optical plate 12 and then the thickness on material island 26 is about 1 μ m～about 1mm, be preferably about 5 μ m～about 100 μ m, more be preferably about 8 μ m～about 20 μ m, be preferably about 14 μ m especially.
The weight per unit area of the white scraps of paper 28 is 50g/m
2～200g/m
2, be preferably 80g/m
2～170g/m
2, more be preferably 100g/m
2～150g/m
2, be preferably 120g/m especially
2
The scraps of paper 28 not only can be by based on the paper of cellulose fibre but also can be obtained by the paper based on synthon.
At the bottom of the white plastic film made by PET, PVC or polystyrene or mirror film (Spiegelfolie) for example can also be set preferably replace the white scraps of paper 28 as reflector substrate.
On the face 34 away from optical plate 12 of the white scraps of paper 28, recline one for example for the reflection horizon 36 of self-adhesion mirror form membrane or by metal, particularly reflection horizon made of aluminum, described reflection horizon is directly, apply at the bottom of the reflector substrate on 28 by gas phase treatment usually.This sandwich arrangement/sandwich style arrangement 24 that comprise by reflection unit, that be made up of reflection horizon 36, the white scraps of paper 28 and material island 26 hides by the housing 38 of reflection unit 24, and the bottom surface 40 of described housing abuts on the reflection horizon 36.Particularly, if light guide 10 is not subjected to mechanical load, then in a kind of modification, can also omit housing 38.
The reflecting material that forms material island 26 comprises the scandium oxide reflection grain.Alternatively, can with lanthanide oxide and rare-earth oxide for example cerium oxide, praseodymium oxide, neodymia, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosia, holimium oxide, erbium oxide, thulium oxide, ytterbium oxide or luteium oxide with the material that acts on reflection grain.Preferably, only be provided with the reflection grain of making by pure zirconia scandium or pure zirconia ytterbium.
Can realize on the diffusing surface or on specular reflection surface in the reflection on the reflection grain.Ideally, each independent reflection grain forms material island 26.In the embodiment shown in this paper, described reflection grain itself is evenly distributed in the carrier material, and described carrier material can be epoxy resin or vibrin especially.
When making light guide 10, under the situation of using reflective coating, for example pattern is for example printed on second interarea 22 of optical plate 12 by silk screen print method.That reflective coating also comprises except comprising the liquid resin bond that contains hardening agent is meticulous, reflection grain that distribute equably, that made by scandium oxide or other above-claimed cpd.Before resin solidification became carrier material, the scraps of paper 28 can be placed and be pressed on the potpourri of resin-hardening agent-reflection grain, so the described scraps of paper fix by the material island 26 that is obtained behind resin solidification, wherein obtained the above-mentioned distance with optical plate 12.
Alternatively, can also at first corresponding pattern be printed at the bottom of the reflector substrate on 28, particularly print on the white scraps of paper 28.To this, the liquid resin bond that bonding agent known, that can carry out serigraphy itself for example can be contained hardening agent is mixed with the reflection grain of particularly being made by scandium oxide before as reflective coating in this bonding agent.This bonding agent with reflection grain is printed on corresponding reflector substrate in corresponding printing machine at the bottom of, on for example paper, described printing machine for example can be in the width of 20cm～2.5m.After the corresponding pattern on paper was for example by ultraviolet light or heat curing, the material island 26 that is kept can utilize organosilicone film to cover, and printing, that have organosilicone film by this way paper is winding on the roller and is stored.Can for example make as the acrylic plate of photocon 12 laminated by the drum-type pressing mechanism then with (paper) sheet of making by the paper of such printing.This has caused the laminar structure be made up of the scraps of paper 28 and photocon 12, remains with the above-mentioned distance between second interarea 22 of the scraps of paper 28 and photocon 12 in described laminar structure.
In modification, also the organic silico briquette of organosilicon material, particularly elasticity can be used for the bond of reflective coating, described organic silico briquette can obtain by adding hardening agent to rarer silicone oil.Correspondingly, this reflection grain silicone oil equally distributed therein, that have hardening agent can print on second interarea 22 or the white scraps of paper 28 of optical plate 12, thereby forms corresponding material island 26 after making rarer silicon oil solidifying become the organic silico briquette of elasticity.
According to the volume that is provided by material island 26, the diameter of reflection grain is about 0.5 μ m～about 300 μ m, preferred about 0.5 μ m～about 50 μ m, more preferred about 0.5 μ m～about 4 μ m, preferred especially about 2 μ m.
Reflection grain is not movable basically within bond.Yet in the elasticity bond, described reflection grain can be out of shape with this bond.
According to the concentration of reflection grain in the carrier material on material island 26, a kind of in the modification that this does not specially illustrate, can also omit the white scraps of paper 28 and only with reflection horizon 36 as at the bottom of the reflector substrate.In this case, reflection horizon 36 correspondingly abuts on the material island 26.
At the section corresponding to Fig. 2 of the different change example of light guide shown in Fig. 3 to Fig. 8 10, wherein material island 26 looks up in the side towards second interarea 22 of photocon 12 and has different exterior contours and distance to each other respectively.Correspondingly, the exterior contour on material island 26 for example can be circular outer profile (Fig. 2 and Fig. 4), semicircle exterior contour (Fig. 5), square exterior contour (Fig. 3) or rectangle exterior contour (Fig. 6 and Fig. 7).Such material island 26 shown in Figure 8, that is, its exterior contour is equivalent to the clean exterior contour of two semicircles that are spaced apart from each other, and the straight sides of described clean exterior contour is put relatively.In the embodiment according to Fig. 6, material island 26 is designed to the rib shape.It is also conceivable that other polygon for described exterior contour.
In embodiment according to Fig. 4, the surface coverage of material island 26 on second interarea 22 of optical plate 12
On narrow 16,18 direction, inwardly reduce.In other words, the distance between the material island 26 on described direction along with narrow 16,18 distance increases and become big.Like this, with compare being arranged in inner zone, in the outer edge zone may of second interarea 22 of optical plate 12, on the ratio more light by 26 reflections of material island, with this based on considering possible loss of light intensity with narrow 16 of optical plate 12,18 distance.
If material island 26 has semicircle exterior contour (as shown in Figure 5), then described material island 26 can so be provided with in couples, makes the linearly extended outer rim on two material islands 26 put relatively.
Observing on the direction of second interarea 22 of photocon 12 that---promptly in the plane on material island---radical length on material island 26 is about 0.01mm～about 100.0mm, preferably about 0.05mm～about 10.0mm, more preferably about 0.1mm～about 5.0mm, especially preferred about 0.2mm～1.0mm.If material island 26 has irregular exterior contour, can consider that then average clean exterior contour with corresponding material island 26 is as the reference value that is used for its radical length.
Distance between two material islands 26 is about 0.01mm～about 100.0mm, preferably about 0.05mm～about 10.0mm, more preferably about 0.1mm～about 3.0mm, especially preferred about 0.2mm～1.0mm.
If the ratio of the distance that the radical length on material island 26 is mutual with it is about 1: 4～about 5: 1, then light guide 10 particularly has good light reflex and photoconduction effect.At this, in the volume of 1 liter of carrier material, should be distributed with the reflection grain that is not less than 0.5g, preferred purity and be 99.9% scandium oxide white powder.Preferably, in the volume of 1 liter of carrier material, distribute have an appointment 0.5g～25g, more preferably about 1g～about 10g, especially preferably about 1g～about 2.5g reflection grain, preferably purity is 99.9% scandium oxide white powder.
In addition, about in the explanation of the light guide 10 shown in Fig. 1 and Fig. 2 on meaning/principle, correspondingly also being suitable at the light guide shown in Fig. 3 to Fig. 8 10.
As mentioned above, between the outside surface 30 of described second interarea 22 and material island 26, be formed with photoconductive channel system 32 at second interarea 22 of optical plate 12, the white scraps of paper 28.The light that leaves optical plate 12 via second interarea 22 of described optical plate 12 towards material island 26 is partly reflected along a plurality of direction in spaces by the reflection grain that is present in the material island 26, and described direction in space has a durection component that is parallel to second interarea 22 of optical plate 12.
According to the difference of the incident angle on second interarea 22 of light beam arrival photocon, a part of light can be then towards the white scraps of paper 28 reflections.Correspondingly, light can be by the white scraps of paper 28 towards optical plate 12 reflections, and wherein light mainly reflects on the face 30 of the white scraps of paper.By this way, a part of light is propagated in channel system 32.At this, light is by material island 26 or by being distributed in that reflection grain in the material island 26 reflects and therefore 26 being transmitted to next material island 26 through channel systems 32 from a material island.
By the reflection grain of making by scandium oxide or other compound that is fit to, on the length on the length of second interarea 22 of optical plate 12 or material island 26, reflect equably, wherein light deflection such angle, inject in the described optical plate 12 when making a part of light on being mapped to second interarea 22 of optical plate 12, and leave described optical plate 12 once more via first interarea 14 of optical plate 12 as effective light.
By described channel system 32, the light of injecting in the optical plate 12 distributes on the length of optical plate 12 equably, thereby described optical plate 12 is launched effective light equably.
This ability that produces uniformly effective light effectively of light guide 10 for example can be used for light fixture.
The example of this light fixture of lighting unit 42 forms is shown in conjunction with the illumination of liquid crystal panel 44 in Fig. 9.
Below only so that appreciable housing 46 is that example is elaborated to housing 46 and 48 on Fig. 9 top.Described design correspondingly also is applicable at the housing 48 shown in Fig. 9 bottom on meaning.
Semiconductor light emitting chip 52 for example comprises the n type layer that is made of n-GaN or n-InGaN, and the p type layer that is made of III-V N-type semiconductor N material such as p-GaN.Between this n type layer and p type layer, can be provided with a mqw layer.MQW is the abbreviation of " Multiple Quantum Well (Multiple Quantum Well) ".The MQW material comprises superlattice, and these superlattice have an electronic band structure according to the superlattice structure change, and launch corresponding light when different wave length.By selecting mqw layer, can influence the spectrum of the radiation of sending targetedly by pn N-type semiconductor N luminescence chip.
Alternative semiconductors luminescence chip 52 can also be provided with other light source, for example luminotron.This luminotron can also be designed to compact fluorescent lamp, and they are also referred to as electricity-saving lamp or CFL pipe.Also can consider fluorescent light or cold-cathode tube are used as luminotron.Cold-cathode tube is also referred to as the CCFL pipe.
The inner chamber 50 of housing 46 is liquid-filled by the be in a liquid state leaded light of silicone oil 54 forms, and this silicone oil is represented with circle in Fig. 9, and will be conducted to narrow 16 of light guide plate 12 by the light that semiconductor light emitting chip 52 sends.Simultaneously, outwards loose by silicone oil 54, particularly loose to the wall portion of housing 46 by the heat that semiconductor light emitting chip 52 produces.
The semiconductor light emitting chip 52 that is made of p-GaN/n-InGaN is launched blue light and the ultraviolet light in 420 nanometer to 480 nanometer wavelength range when being applied in a voltage.For utilizing semiconductor light emitting chip 52 to produce white light, in silicone oil 54, be evenly distributed with thin phosphor particles/phosphor particle 56, this phosphor particles is made by the transparent solid material with colour center.These phosphor particles 56 use the circle littler than the circle of representing silicone oil 54 to represent in Fig. 9.Phosphor particles 56 also can be the potpourri of multiple different phosphor particles.Therefore can will be transformed into the radiation that a kind of its spectrum and desired spectrum are complementary by the radiation that semiconductor light emitting chip 52 sends by suitably selecting phosphor particles or phosphor particles potpourri.If save phosphor particles 56, then lighting unit 42 is launched blue lights.
A plurality of semiconductor light emitting chips 52 are in parallel, and can be provided with voltage via two feeder lines 58 and 60.For this reason, terminate in can be by in the approaching connecting portion/terminal in outside for feeder line 58 and 60.If with higher supply voltage power supply, then semiconductor light emitting chip 52 also can be connected.
The inwall of housing 46 is provided with a reflection horizon 62, even at first also reflexing to light guide plate or its narrow 16 by semiconductor light emitting chip 52 along the light of the direction emission of leaving light guide plate 12 thus.
In Fig. 9, lighting unit 42 is arranged on the dorsal part 64 of liquid crystal panel 44.With dorsal part 64 opposed to each other, liquid crystal panel 44 has the side of watching 66.The liquid crystal panel itself that for example is applied in the LCD screen is known, so no longer it is described in detail herein.
The optically coupled layers 68 that comprises the organic silico briquette of elasticity can obtain by adding hardening agent to rare silicone oil.First interarea 14 of optically coupled layers and light guide plate 12 and directly contact with outside surface on the dorsal part 64 of liquid crystal panel 44.
In a modification, optically coupled layers 68 also can comprise resin, for example epoxy resin or vibrin.In this case, as is known, optically coupled layers 68 can by make one be added with hardening agent, be the aqueous resin solidification that covers of executing and obtain.
Utilize this lighting unit 42, can send the even light of higher-strength through light guide plate 12 first interareas 14, described light is sent to liquid crystal panel 44 and is liquid crystal panel 44 illuminations from its dorsal part 64 via the coupling layer 68 of the organic silico briquette that comprises silicone oil or viscosity.
The background illumination that is used for liquid crystal panel 44 of the light guide 10 in the lighting unit 42 be applied in this only as a kind of example of the application of light guide 10.
Another kind of possibility is: lighting unit 42---under the situation that does not have liquid crystal panel 44---is with acting on the light fixture that perimeter or interior zone throw light on.Can provide such lighting unit 42 by the strong reflection effect of light guide 10 and the extraordinary photoconductive property that interrelates therewith, described lighting unit 42 has bigger size, yet only needs the less luminescent device 52 of consumed power (Aufnahmeleistung).
In a kind of modification, liquid crystal panel 44 has the lenticule that does not specially illustrate here watching on the side 66.Thereby emitted light can not only boundling and can be diverted, so that can meet the various requirement of light design.Omit coupling layer 68 in this case, wherein optical plate 12 and liquid crystal panel 44 keep being spaced apart from each other.
Like this, for example can form lighting unit 42 with optical plate 12, the length of described optical plate 12 is that 5m, width are that 10cm～20cm, thickness are 1mm～8mm, wherein only needing power is the luminescent device of 2W～5W, so that the effective luminous energy of high strength is via first interarea, 14 radiation of optical plate 12 uniformly.Therewith correspondingly, one or more this lighting units 42 can be used for effective lighting tunnel, street or buildings, particularly industrial venue.
Another kind of possibility for example is: light guide 10 as be connected with another passive luminophor at least, the secondary light coupling/secondary passive luminophor of injecting light, this is shown in Figure 10.
Shown in Figure 10 one has the light fixture 100 of a plurality of light guides 70 to 88, and described light guide 70 to 88 quite and partly is being of different sizes and exterior contour with light guide 10 aspect its structure.
In contrast to this, light guide 78,80 and 82 is connected to each other by web member 98, thereby the light of injecting in the light guide 78 is injected in the light guide 80, and continues therefrom to inject in the light guide 82.Therefore, light guide 78,80 and 82 is arranged according to the mode of series connection.
Three light guides 84,86 and 88 also are connected to each other by corresponding web member 98.There, inject the light that is arranged in the middle light guide 84 and conduct to two light guides 86 and 88 that laterally place light guide 84 both sides.
In case of necessity, in web member 98, between opposed narrow optical material, for example silicone oil are set at two light guides.
The light that leaves light guide 70 to 88 via each first interarea 14 of light guide 70 to 88 have one with the almost suitable intensity of intensity of luminescence unit 92 or its light source.
Utilize this light fixture 100 can illuminate very large area or have the buildings in a plurality of rooms, wherein said light fixture 100 comprises center luminescence unit 92 and a plurality of light guide 70 to 88, wherein said a plurality of light guides 70 to 88 and center luminescence unit 92 and/or be connected in the mode of leaded light each other.
If the light source 52 that for example will have the semiconductor light emitting chip is as center luminescence unit 92, it is described to it to get in touch lighting unit 42 as mentioned, for example be 25 watt-hours then, can on center luminescence unit 92, realize the light intensity of 2125 lumens in power consumption (Leistungsaufnahme).In this case, the light guide 70 to 88 of light fixture 100 can send the light that intensity is about 2000 lumens respectively.
As mentioned above, when making light guide 10, can print at the bottom of the reflector substrate on 28 by corresponding printing machine by having corresponding pattern that bonding agent reflection grain, can serigraphy constitutes.
The bonding agent that described usefulness acts on the carrier material of reflection grain preferably is bright and clean limpid with optically transparent after curing.---being epoxy resin, vibrin or organosilicon material---except above-mentioned material, bonding agent can also be formed by the bonding agent (for example polyacrylate/salt) of a material based on acrylate (particularly polymethylmethacrylate) or dispersion adhesive or ultraviolet light polymerization.
Applied optical adhesive preferably has almost suitable with the refractive index of optical plate 12 refractive index under solid state.
Except above-mentioned silk screen print method, also can use other known method.For example can use ink-jet method as employed in rapid prototyping technology and so-called 3D printing technology.In case of necessity, also can will have different component---for example different aspect the Density Distribution of the Density Distribution of reflection grain and granules of pigments that is mixed where necessary and/or phosphor material---the material island in a process, apply to reflector substrate at the bottom of on 28.
Utilize above-mentioned light guide 10, in other application, can also make Warning Mark or ornament lamp.This sets forth by a kind of embodiment (shown in Figure 11) of Warning Mark 102 below.Following embodiment correspondingly also is suitable on meaning for ornament lamp.
Warning Mark 102 comprises that one makes the lighting unit 42 of change slightly, and wherein the interarea 14 of optical plate 12 forms the face of watching of Warning Mark 102.Described change is: 28 have a printing figure message 104 at its outside surface 30 upper supports towards material island 26 at the bottom of the reflector substrate.Described printing figure message can be the arbitrary image of colour or black and white.At this, printing figure message 104 needn't form unbroken coating on 28 at the bottom of the reflector substrate.The thickness of printing figure message 104 with known printing process for example hectographic printing or digital printed in the thickness of printed coating (Druckauftrag) suitable, and be in the scope of about 1 μ m.
Preferably, in Warning Mark 102 with film, particularly white plastic film as at the bottom of the reflector substrate 28.But the above-mentioned scraps of paper or mirror film also are suitable for.
By day the time, under semiconductor light emitting chip 52 idle situations, also can use Warning Mark 102 now.In this case, the beholder of Warning Mark 102 can see the layer and the image that appears of optical plate 12 that pass through to have material island 26 of printing figure message 104.
Pitch-dark/during night, semiconductor light emitting chip 52 be activated and white light in the above described manner method inject in the optical plate 12.Printing figure message 104 can be identified on the point by 26 contacts of material island for the beholder of Warning Mark 102 well.The image of printing figure message 104 manifests to the beholder in the mode that is transformed into mesh/be scanned (gerastert).
When making Warning Mark 102, before stamping material island 26,28 are provided with printing figure message 104 with conventional approaches at the bottom of the reflector substrate.
In a kind of modification of Warning Mark 102, can also omit printing figure message 104, and the image that will the reappear corresponding layout by material island 26 is formed at the bottom of the reflector substrate bright or white on 28.Alternatively, printing figure message 104 also can be designed to become clear or white.Human eye can be identified in zone with material island 26 and the luminance difference between the zone that does not have material island 26 when activating semiconductor luminescence chip 52.
By this way, when light was injected optical plate 12, material island 26 manifested beholder to Warning Mark 102 as bright areas, and the zone between the material island 26 presents dead color or dark color.In the corresponding arrangement on material island 26, when activating semiconductor luminescence chip 52, can produce mesh image/scanning yoke picture.Yet in this case, can not recognition image when not having light to inject.
Have and the difform photocon 12 of flat geometric configuration if substitute optical plate 12 uses on plane, then light guide 10 reaches correspondingly, and Warning Mark 102 can be designed to right cylinder, cut cylinder, cone, truncated cone, corrugated sheet etc.
Claims (32)
1. light guide has:
A) photocon (12), described photocon defines by first interarea (14) with described isolated second interarea in the first main surface parallel ground (22);
B) reflection unit (24), described reflection unit are arranged on this side of described second interarea (22) of described photocon (12), can make light at least towards the internal reflection of described photocon (12) by described reflection unit,
It is characterized in that,
C) described reflection unit (24) comprises the material island (26) that the reflecting material by preferably clear forms.
2. light guide according to claim 1 is characterized in that, described material island (26) is arranged basically regularly.
3. light guide according to claim 1 and 2 is characterized in that described reflecting material comprises reflection grain.
4. light guide according to claim 3, it is characterized in that described reflection grain comprises one or more in the following compound: scandium oxide, lanthanide oxide, cerium oxide, praseodymium oxide, neodymia, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosia, holimium oxide, erbium oxide, thulium oxide, ytterbium oxide, luteium oxide.
5. light guide according to claim 4 is characterized in that, only is provided with the reflection grain of being made by pure zirconia scandium or pure zirconia ytterbium.
6. according to each described light guide in the claim 3 to 5, it is characterized in that described reflecting material comprises a carrier material, described reflection grain is evenly distributed in the described carrier material basically.
7. light guide according to claim 6 is characterized in that described carrier material is a resin, particularly epoxy resin or vibrin.
8. light guide according to claim 6 is characterized in that described carrier material is an organosilicon material, particularly the organic silico briquette of elasticity.
9. according to each described light guide in the claim 1 to 8, it is characterized in that described material island (26) contacts with second interarea (22) of described photocon (12) at least.
10. according to each described light guide in the claim 1 to 9, it is characterized in that described reflection unit (24) comprises (28) at the bottom of the reflector substrate, is arranged at the bottom of the described reflector substrate on the side away from described photocon (12) on material island (26).
11. light guide according to claim 10 is characterized in that, described material island (26) by described reflector substrate at the bottom of (28) supporting.
12. light guide according to claim 10 is characterized in that, (28) particularly have the printing figure message (104) of a colour or black and white at the bottom of the described reflector substrate at the side upper support towards described material island (26).
13., it is characterized in that (28) are spaced apart with described photocon (12) at the bottom of the described reflector substrate according to claim 10 or 12 described light guides.
14. light guide according to claim 13, it is characterized in that be about 1 μ m to about 1mm, preferred about 5 μ m to about 100 μ m, more preferred about 8 μ m extremely about 20 μ m, the especially preferred about 14 μ m of the described distance at the bottom of the described reflector substrate between (28) and the described photocon (12).
15., it is characterized in that (28) are the white scraps of paper (28) at the bottom of the described reflector substrate according to each described light guide in the claim 10 to 14.
16. light guide according to claim 15 is characterized in that, the weight per unit area of the described scraps of paper (28) is 50g/m
2To 200g/m
2, preferred 80g/m
2To 170g/m
2, more preferred 100g/m
2To 150g/m
2, preferred especially 120g/m
2
17. according to each described light guide in the claim 10 to 16, it is characterized in that, described reflection unit (24) comprises a reflection horizon (36), particularly a mirror film, or one by metal, particularly reflection horizon (36) made of aluminum, and described reflection horizon is arranged on the side away from described photocon (12) of (28) at the bottom of the described reflector substrate.
18. according to each described light guide in the claim 1 to 17, it is characterized in that, look up in side towards described second interarea (22) of described photocon (12), described material island (26) has an exterior contour, and described exterior contour is suitable with circle, semicircle, ellipse, rectangle, square or other polygonal exterior contour.
19. according to each described light guide in the claim 1 to 18, it is characterized in that, look up in side towards described second interarea (22) of described photocon (12), the radical length on described material island (26) for about 0.01mm to about 100.0mm, preferred extremely about 10.0mm, more preferred extremely about 5.0mm, preferably about especially 0.2mm to 1.0mm of about 0.1mm of about 0.05mm.
20. according to each described light guide in the claim 1 to 19, it is characterized in that, the distance between two described material islands (26) for about 0.01mm to about 100.0mm, preferred extremely about 10.0mm, more preferred extremely about 3.0mm, preferably about especially 0.2mm to 1.0mm of about 0.1mm of about 0.05mm.
21., it is characterized in that described photocon (12) is made by glass or acrylate glass or epoxy resin according to each described light guide in the claim 1 to 20.
22. a light fixture, described light fixture have passive luminophor (10; 70,72,74,76,78,80), by elementary luminescent device (52; 92) Fa She luminous energy is injected in the described passive luminophor, it is characterized in that, described passive luminophor (10; 70, be 72,74,76,78,80) according to each described light guide (10 in the claim 1 to 21; 70,72,74,76,78,80).
23. light fixture according to claim 22 is characterized in that, by described luminescent device (52; 92) Fa She luminous energy is injected in the photocon (12).
24. according to claim 22 or 23 described light fixture, it is characterized in that, be provided with at least one other passive luminophor (10; 70,72,74,76,78,80).
25. a method that is used for making according to each described light guide (10) of claim 1 to 20, described method comprises the following steps:
A) prepare adhesive material;
B) described adhesive material is mixed with reflection grain, thereby described reflection grain is evenly distributed in the carrier material basically;
C) will be applied to by the material island (26) that described adhesive material forms together with the reflection grain that is distributed in the described adhesive material in the substrate (28);
D) make photocon (12) laminated like this, make described material island (26) be arranged between described substrate (28) and the described photocon (12) with the described substrate (28) on supporting described material island (26).
26. method according to claim 25 is characterized in that, described substrate (28) is particularly white plastic film, mirror film or the scraps of paper of plastic sheeting.
27., it is characterized in that described adhesive material is by a kind of formation the in the following material: epoxy resin according to claim 25 or 26 described methods; Vibrin; The organic silico briquette of organosilicon material, particularly elasticity; Based on the material of acrylate, particularly polymethylmethacrylate; The bonding agent of dispersion adhesive or ultraviolet light polymerization, for example polyacrylate/salt.
28., it is characterized in that in step c), described substrate (28) is provided with printing figure message (104) before applying material island (26) according to each described method in the claim 25 to 27.
29. method according to claim 28 is characterized in that, the plane is made and be designed to described printing figure message (104) by bright material.
30. method according to claim 28 is characterized in that, described printing figure message (104) is designed so that described printing figure message reproduces black and white or coloured image.
31. according to each described method in the claim 25 to 30, it is characterized in that, in step c), described material island (26) be applied in the described substrate (28) by silk screen print method.
32. according to each described method in the claim 25 to 31, it is characterized in that, in step d), make described photocon (12) laminated with the described substrate (28) on supporting described material island (26) by laminating.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710050271 DE102007050271B4 (en) | 2007-10-18 | 2007-10-18 | Light guide device and lighting device with such a light guide device |
| DE102007050271.2 | 2007-10-18 | ||
| PCT/EP2008/008772 WO2009052992A2 (en) | 2007-10-18 | 2008-10-16 | Light guide device, illumination device with a light guide device of said kind and method for the production of a light guide device of said kind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101896843A true CN101896843A (en) | 2010-11-24 |
Family
ID=40490048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801204757A Pending CN101896843A (en) | 2007-10-18 | 2008-10-16 | Light guide device, illumination device with a light guide device of said kind and method for the production of a light guide device of said kind |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2238487A2 (en) |
| CN (1) | CN101896843A (en) |
| DE (1) | DE102007050271B4 (en) |
| WO (1) | WO2009052992A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733088A (en) * | 2014-05-13 | 2016-07-06 | 上海宇明光电材料技术有限公司 | Preparation method of modified plastic for LED tube |
| CN109932776A (en) * | 2017-12-18 | 2019-06-25 | 现代自动车株式会社 | Light guide |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG189729A1 (en) * | 2008-04-02 | 2013-05-31 | Basf Se | Process for isolating n2o |
| US20110261586A1 (en) * | 2008-12-23 | 2011-10-27 | Koninklijke Philips Electronics N.V. | Light guide system, and reflector for controlling out-coupling of light |
| AT523067B1 (en) * | 2019-12-04 | 2021-05-15 | Hueck Folien Gmbh | Light guide plate |
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| JPH07176794A (en) * | 1993-12-17 | 1995-07-14 | Nichia Chem Ind Ltd | Planar light source |
| CN1377452A (en) * | 1999-10-08 | 2002-10-30 | 3M创新有限公司 | Lightguide having a directly secured reflector and method of making the same |
| CN1674315A (en) * | 2004-03-26 | 2005-09-28 | 株式会社小糸制作所 | Light source assembly and head lamp for vehicle |
| US20070194693A1 (en) * | 2004-03-26 | 2007-08-23 | Hajime Saito | Light-Emitting Device |
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| JPS6229003A (en) * | 1985-07-30 | 1987-02-07 | 株式会社トキメック | Back reflection type light diffuser |
| EP0500089B1 (en) * | 1991-02-21 | 1996-08-14 | Tosoh Corporation | Back lighting device |
| US5796450A (en) * | 1994-12-16 | 1998-08-18 | Canon Kabushiki Kaisha | Illumination device and liquid crystal display apparatus including same |
| DE10065728B4 (en) * | 2000-12-29 | 2009-04-23 | Robert Bosch Gmbh | Backlight device and liquid crystal display and their use in a motor vehicle |
| DE102007025573A1 (en) * | 2007-05-31 | 2008-12-04 | Noctron Holding S.A. | Liquid crystal display panel |
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2007
- 2007-10-18 DE DE200710050271 patent/DE102007050271B4/en not_active Expired - Fee Related
-
2008
- 2008-10-16 EP EP08842992A patent/EP2238487A2/en not_active Withdrawn
- 2008-10-16 WO PCT/EP2008/008772 patent/WO2009052992A2/en active Application Filing
- 2008-10-16 CN CN2008801204757A patent/CN101896843A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176794A (en) * | 1993-12-17 | 1995-07-14 | Nichia Chem Ind Ltd | Planar light source |
| CN1377452A (en) * | 1999-10-08 | 2002-10-30 | 3M创新有限公司 | Lightguide having a directly secured reflector and method of making the same |
| CN1674315A (en) * | 2004-03-26 | 2005-09-28 | 株式会社小糸制作所 | Light source assembly and head lamp for vehicle |
| US20070194693A1 (en) * | 2004-03-26 | 2007-08-23 | Hajime Saito | Light-Emitting Device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733088A (en) * | 2014-05-13 | 2016-07-06 | 上海宇明光电材料技术有限公司 | Preparation method of modified plastic for LED tube |
| CN109932776A (en) * | 2017-12-18 | 2019-06-25 | 现代自动车株式会社 | Light guide |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007050271A1 (en) | 2009-04-30 |
| DE102007050271B4 (en) | 2012-02-02 |
| EP2238487A2 (en) | 2010-10-13 |
| WO2009052992A3 (en) | 2009-10-15 |
| WO2009052992A2 (en) | 2009-04-30 |
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Application publication date: 20101124 |