CN1211675C - Hollow surface illuminator - Google Patents
Hollow surface illuminator Download PDFInfo
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- CN1211675C CN1211675C CNB018133657A CN01813365A CN1211675C CN 1211675 C CN1211675 C CN 1211675C CN B018133657 A CNB018133657 A CN B018133657A CN 01813365 A CN01813365 A CN 01813365A CN 1211675 C CN1211675 C CN 1211675C
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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
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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
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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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
- G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
Abstract
A light-conducting unit (6) which can effectively balance the light-leaking effect and the light-propagation effect of the prismatic films (1, 2) forming the light-conducting space (3), and satisfy the requirements to reduce the weight of the unit is disclosed. A light-conducting unit (6) comprising the first prismatic film (1) and the second prismatic film (2), each having two major surfaces, one of which is a prismatic surface, and the other of which is a flat surface, said prismatic surface carrying prisms arranged substantially parallel to each other, wherein said two prismatic films (1, 2) are arranged so that the first edges (11, 21) of said prismatic films (1, 2) are positioned to form an opening (30), a light-conducting space (3) is formed between said prismatic films (1, 2), and the height of said light-conducting space (3) does not substantially increase from said opening (30) to the remote edges (12, 22) of the prismatic films (1, 2) opposing said opening (30), and the major surface of said first prismatic film (1) which faces outside said light-conducting space (3) is a light-emitting surface, and the arrangement of the both prismatic films (1, 2) and the directions of the prisms of the both prismatic films (1, 2) in relation to the incident direction of light (40) are defined under the specific conditions.
Description
Technical field
The present invention relates to a kind of optical guide unit, it is used as the area source backlight of LCD or outdoor sign board, perhaps is used as a kind of inside or external lighting device.Optical guide unit of the present invention can be used to substitute traditional optical plate, and because of its inside has the photoconduction space of a hollow, thereby can alleviate optical guide unit, the weight of area source thus.
Background technology
As shown in Figure 1, a traditional area source adopts a solid optical plate 10 luminous, and this optical plate receives light from a pointolite or a line source (that is the lamp among Fig. 1).This optical plate is made by the polymeric material such as acryl resin usually.The light that sends from light source enters optical plate by light incident seamed edge (light incident side face), and is allowed to from one of them emission of the first type surface of optical plate, and light is propagated towards the distal edge of the plate relative with light incident seamed edge from light incident seamed edge by this plate.So just realized the emission of face light.
The full internal reflection of the light at the interface place of propagation utilization between air and optical plate of the light by optical plate, it is owing to the difference of the refractive index between air and the optical plate (polymeric material).Such optical plate is the major part that is used for the backlight liquid crystal display area source.For example, Japanese laid-open patent application A-11-142845 discloses such optical plate and and has comprised the backlight of optical plate.
Yet when using a solid light guide plate, the weight that reduce area source becomes very difficult.For example, along with the expansion of LCDs, the area of optical plate (light emitting surface is long-pending) and the thickness of area source thereupon progressively increase.Therefore, the increase of the weight of optical plate makes the minimizing of area source weight become very difficult, thereby is difficult to reduce the weight of LCD.Even in the situation of small-sized LCD, also requirement for height reduces the weight of area source, for example, such as the terminal of pocket pc, mobile phone, PHS, etc.
Therefore, existing people proposes to adopt the optical guide unit of a hollow to replace solid optical plate.For example, known have a kind of hollow light guide unit, it comprises a smooth expelling plate and a backboard, and their layouts parallel to each other are forming the photoconduction space of a hollow, and two respectively are arranged on light expelling plate and the spectro-film on the back plate surface of inboard, photoconduction space (prismatic film).
Spectro-film is a kind of well-known optical element, and its implication is the light transport membranes, and its first type surface is flat, and the prism (so-called parallelogram prism) of a plurality of layouts parallel to each other along its length of its another first type surface carrying.Such light transport membranes is placed between optical plate and the illuminated object (for example, LCDs etc.) usually.
For light is launched from optical guide unit, in general, a linear light sorurce (for example, a fluorescent tube etc.) is placed along the opening that the end in above-mentioned photoconduction space forms, and light is by opening radiation in the photoconduction space.Leave a gap by above-mentioned paired spectro-film parallel to each other substantially and between are set, form above-mentioned opening.This paired spectro-film makes its plane surface arrange parallel to each other usually.
Such optical guide unit has first opening that is formed on unit one end, and second opening that is formed on the other end relative with this end (from this end end farthest), and two light sources are placed in each opening, with optical radiation to the photoconduction space.Because paired spectro-film arranges parallel to each other, thus the height in photoconduction space (along thickness direction), that is, and perpendicular to the size of light emission surface, from one end first opening to not changing basically at second opening from this section distal-most end.
The present inventor has proposed in JP-A-6-180552 to comprise that such hollow light guide unit and comprises an embodiment of the area source of this optical guide unit and a light source.Before this invention JP-A-6-180552, the known embodiment that other optical guide unit is arranged.
In other embodiment of optical guide unit, (i) orientation of the spectro-film prism on the light expelling plate is parallel with the direction of light that light source sends, and the spectro-film surface of carrying parallelogram prism is arranged in towards the outside in photoconduction space.In addition, (ii) the direction of the spectro-film prism on backboard is also parallel with the direction of light that light source sends, and the spectro-film surface is arranged in towards the outside in photoconduction space.In the situation of the area source that comprises such optical guide unit, send the illumination of light from light emission surface, along with increase, be tending towards reducing from light source distance.Therefore, must add the reduction that additional optical element is revised this illumination.Such additional optics promptly is so-called extractor, and it has the zigzag projection that is used to reflect, and the distance between them increases with the increase from light source distance.Such extractor is arranged on the plane surface of spectro-film of backboard side usually.
The inventor proposes a kind of improved optical guide unit in JA-A-6-180552, so that an inexpensive optical guide unit and an area source to be provided, it without any need for an extractor and an area source, therefore, can very easily design and produce.
In other words, the hollow light guide unit that is proposed comprises a pair of spectro-film, they are fixed on the corresponding position, make it be arranged in specific three-dimensional structure, wherein, (I) prismatic surfaces that is used as a spectro-film of a smooth plane of departure is arranged like this, promptly, the direction of prism that makes this spectro-film is perpendicular to sending direction of light from light source, and prismatic surfaces is towards the inboard in photoconduction space.In addition, (II) other spectro-film is arranged like this, that is, make the direction of prism of other spectro-film parallel with the direction of light of sending from light source, and prismatic surfaces is towards the inboard in photoconduction space.Thus, under the situation of not using an extractor, make the illumination on the light emission surface become even.
Adopt above-mentioned this optical guide unit, a part of light that sends from light source is reflected by spectro-film, and the light of remaining part passes through the spectro-film in the light emitting side, and launches from light emission surface (light leakage).Launched from light emission surface by the light that spectro-film reflects, perhaps,, propagate into from a light source end farthest from a end near light source by by all spectro-film interreflections and transmission in the photoconduction space.In other words, the balance between light leakage and light are propagated is important.If the light leakage effect is too strong, light quantity then to be propagated reduces, and like this, photoemissive homogeneity is tending towards degenerating.The increase of light leakage effect causes the increase of brightness of illumination.
Therefore, according to optical guide unit (promptly, area source) purposes, the characteristics of scale and the like are for balance light leaks and the light propagation, and reach desired brightness and radiative homogeneity, must the structure of optical guide unit be optimized, for example, optimize the three-dimensional structure of two spectro-films and the shape of all prisms of combination, perhaps, selection and the optical element of use such as extractor.
Summary of the invention
As mentioned above, comprise the spectro-film of a pair of arrangement parallel to each other and be fixed on hollow light guide unit in the specific structure, can reduce unit itself, area source and comprise the weight of a device (for example, a LCD etc.) of this area source.
Yet, produce relatively difficulty of above-mentioned optical guide unit traditional, that have suitable minimal thickness.Along with the expansion of liquid crystal display equipment screen, people's requirement for height further reduces the thickness of LCD.In addition, also require to reduce the thickness of above-mentioned portable terminal.
For satisfying these requirements, be necessary the thickness (that is, the thickness in photoconduction space or height) of optical guide unit is reduced to 30mm or littler, preferably be reduced to 20mm or littler.
The reducing of optical guide unit thickness means the reduction of the height in photoconduction space, and the height in photoconduction space just is perpendicular to the size in the space of optical propagation direction.On the other hand, the area of light emission surface (that is distance light travels) reducing and significantly do not reduce with element thickness.After the above-mentioned suggestion of the inventor in JP-A-6-180552 proposes, done further research.It found that, can leak a large amount of light near the edge that light source is placed, and perhaps, when the height in photoconduction space was relatively low, nearly all light quantity did not propagate into distal-most end with can having leakage.Therefore, in order easily to realize the attenuate of element thickness, be necessary than more effectively balance light leakage effect and light propagation effect in the past.Yet, use the additional optical element such as extractor can make the structure of unit become complicated, and be difficult to reduce unit weight.
The invention provides a kind of lightweight optical guide unit, it is the light leakage effect and the light propagation effect of the spectro-film in equilibrium composition photoconduction space effectively, and can satisfy the requirement that alleviates unit weight.
According to a first aspect of the invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, promptly, first edge of described spectro-film is provided with basically parallel to each other, and between them, stay a gap to form an opening, one photoconduction space, it is from described opening, continuous between described spectro-film, the height in the described photoconduction space at the edge, distant place from described opening to relative this opening equates or reduces, and the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the outside in described photoconduction space, and the direction of the direction of the described prism of described first spectro-film and described light is not parallel.
According to a second aspect of the invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, promptly, first edge of described spectro-film is provided with basically parallel to each other, and between them, stay a gap to form an opening, one photoconduction space, it is from described opening, continuous between described spectro-film, the height in the described photoconduction space at the edge, distant place from described opening to relative this opening equates or reduces, and the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the outside in described photoconduction space, and the direction of the described prism of described first spectro-film is parallel with the incident direction of described light; The orientation of described prism that is described second spectro-film is not parallel with the direction of described light.
According to a third aspect of the present invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, promptly, first edge of described spectro-film is provided with basically parallel to each other, and between them, stay a gap to form an opening and a photoconduction space, it is continuous from described opening, be formed between the described spectro-film, and the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the outside in described photoconduction space, and the direction of the described prism of described first spectro-film is parallel with the direction of described light, the described prismatic surfaces of described second spectro-film is placed towards the outside in described photoconduction space, and the direction of the described prism of described second spectro-film is also parallel with the direction of described light; Be that described two spectro-films arrange like this, that is, the height in described photoconduction space reduces to the edge, distant place of this opening relatively from described opening.
According to a fourth aspect of the present invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, that is, first edge of described spectro-film is provided with basically parallel to each other, and stays a gap to form an opening between them, one photoconduction space, it is from described opening, and continuously, the height in the described photoconduction space at the edge, distant place from described opening to relative this opening equates or reduces between described spectro-film.And the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the inboard in described photoconduction space, and the described prismatic surfaces of stating second spectro-film is placed towards the outside in described photoconduction space.
According to a fifth aspect of the present invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, that is, first edge of described spectro-film is provided with basically parallel to each other, and stays a gap to form an opening between them, one photoconduction space, it is from described opening, and continuously, the height in the described photoconduction space at the edge, distant place from described opening to relative this opening equates or reduces between described spectro-film.And the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the inboard in described photoconduction space, and the described prismatic surfaces of described second spectro-film is also placed towards the inboard in described photoconduction space.
According to a sixth aspect of the invention, a kind of optical guide unit is provided, it comprises first spectro-film and second spectro-film, each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism, wherein, described two spectro-films are arranged like this, that is, first edge of described spectro-film is provided with basically parallel to each other, and stays a gap to form an opening between them, one photoconduction space, it is from described opening, and continuously, the height in the described photoconduction space at the edge, distant place from described opening to relative this opening equates or reduces between described spectro-film.And the first type surface towards described first spectro-film in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, it is characterized in that, the described prismatic surfaces of described first spectro-film is placed towards the inboard in described photoconduction space, and the direction of the described prism of described first spectro-film is perpendicular to the described direction of described light, and the drift angle of described prism that is described first spectro-film is less than the drift angle of the described prism of described second spectro-film.
Description of drawings
Fig. 1 is the cut-open view of traditional area source;
Fig. 2 illustrates the optical function of the structure that depends on spectro-film; And
Fig. 3 is the cut-open view that comprises according to the area source of a preferred embodiments of optical guide unit of the present invention.
Embodiment
The effect of spectro-film is full internal reflected light, or waits according to the incident angle of the drift angle of prism, surface that light enters, light and to allow light to reflect betwixt and pass through.Such optical function of spectro-film can be explained with reference to figure 2.
Shown spectro-film has a plurality of identical shaped and parallelogram prisms same size of having in its prismatic surfaces, and they are arranged along the length direction of prism.The example of Fig. 2 shows the optical function of a spectro-film qualitatively, and the prism that this spectro-film comprises has 90 ° drift angle and 45 ° base angle.
When light when the ball centre radiation of Fig. 2 (a) or 2 (b) is on spectro-film, arrive the only total reflection of film by the a-quadrant, and in this film, propagate and reflect by light that other zone arrives film.The light of refraction can turn back to the inboard of spheroid or pass through this film, then according to refraction angle or refraction number of times, from launching (leaking out) with the incidence surface facing surfaces.In other words, according to the incident angle of light, only full internal reflection also propagates into distal-most end, and perhaps, refraction also allows by this film, emission selectively then.The shape and size of zone A, along with characteristic (that is, incidence surface is prismatic surfaces or plane surface) towards the incidence surface of inboard, photoconduction space, or the shape and size of prism and changing.Therefore, the effective combination with a pair of spectro-film of such optical function can be adjusted the balance between light leakage effect and the light propagation effect.
According to the present invention, the three-dimensional structure by suitably selecting spectro-film and the shape of combined prism, and balance light leakage effect and light propagation effect can easily reduce the thickness of unit.The design of optimization is should give in the three-dimensional structure of spectro-film and the combination of prism shape, now is summarized as follows:
(a) direction of the prismatic surfaces of two spectro-films of combination, that is, and towards the inboard or the outside in photoconduction space;
(b) direction of the prism of two spectro-films, that is, and the angle of the direction of prism and the incident direction of the light that sends from light source; When the direction of prism was parallel with the direction of light of sending from light source, this angle was 0 °, when the direction of prism perpendicular to when light source sends direction of light, this angle is 90 °;
(c) drift angle of the prism of two spectro-films of combination; That is, spectro-film can have identical drift angle, or they can have different drift angles;
(d) plane of two spectro-films of combination; That is, their plane surface is parallel to each other, or not parallel mutually.In uneven situation, two spectro-films are arranged in: the height in photoconduction space is from forming at one end opening to reducing from this opening distal-most end.In this case, the form that is wedge along the shape of the xsect in light incident direction photoconduction space planar.
Referring now to the preferred embodiment of Fig. 3 explanation according to photoconduction of the present invention space, this embodiment assembles by the shape of the three-dimensional structure of effective combination spectro-film and prism.
Fig. 3 is the area source (60) that comprises optical guide unit of the present invention (1) and the vertical cross-section view of light source (4).This figure is that incident direction along the light (40) from light source (4) to photoconduction space (3) is at the cross-sectional view perpendicular to the area source in the plane of light emission surface.
In the embodiments of figure 3, two spectro-films (1,2) are arranged and are formed optical guide unit (6), and the spectro-film that this unit comprises (1,2) leaves a distance, to be provided at hollow light guide space (3) between the two.In addition, an edge (11,12) of spectro-film (1,2) is positioned to parallel to each other, and between leaves a gap to form opening (30), and this opening (30) and photoconduction space (3) are continuous.
Light source (4) is arranged near the opening (30), and like this, it is the inboard of illuminated light guide space (3) effectively, and forms area source (60) with optical guide unit (6).In the embodiments of figure 3, the placement of the plane of reflection (41) makes it partly cover the illumination surface of light source (4).The plane of reflection (41) prevents the illumination of light along other direction outside the photoconduction space effectively.In general, reflectance coating (5) is arranged on the back of the body surface of second spectro-film (2), that is, with surperficial opposed outer surface towards inboard, photoconduction space, with the illumination of the light emission surface that increases by first spectro-film (1), that is, and the upper surface among Fig. 3.
When the optical guide unit shown in Fig. 3 embodiment was assembled, the xsect of photoconduction space (3) preferably had a wedge shape.In other words, the plane surface of spectro-film (1,2) is not parallel mutually, and two spectro-films are arranged like this: the height of photoconduction space (3) reduces to distal-most edge (12,22) from the opening (30) first edge (11,12) (this place is provided with light source (4)).
In the first embodiment of the present invention, first spectro-film (it is placed on the light emission surface side) in two spectro-films should be placed like this: its prismatic surfaces is towards the outside in photoconduction space.In this situation, the direction of the prism of first spectro-film should be parallel with direction of light.Thus, light leakage effect and light propagation effect obtain good balance, so the thickness of optical guide unit can easily reduce.
In this embodiment, the shape of the three dimensional arrangement of second spectro-film and prism does not limit.Yet the direction of the prism of second spectro-film is preferably not parallel with the direction of the prism of first spectro-film, and particularly, the angle between the direction of two prisms is preferably in the scope between 40 ° and 90 °.Therefore, even the height that has when the photoconduction space is 30mm or littler, especially, 20mm or more hour, light leakage effect and light propagation effect obtain balance easily.
When the angle between the both direction of prism equaled or approach 0 °, the drift angle of the prism of first spectro-film was preferably in the scope between 80 ° and 95 °, and the drift angle of the prism of second spectro-film is preferably in the scope between 65 ° and 80 °.Therefore, even the height that has when the photoconduction space is 30mm or more hour, light leakage effect and light propagation effect obtain balance easily.
In the first above-mentioned embodiment, the direction of the prism of first spectro-film and the angle between the direction of light are not equal to 0, that is, this both direction is not parallel mutually.In general, in the such scope of angle between 40 ° and 90 °.
In the second embodiment of the present invention, the prismatic surfaces of first spectro-film is placed to towards the outside in photoconduction space, and the direction of the prism of first spectro-film is parallel with direction of light.In this embodiment, the three-dimensional structure of second spectro-film forms as follows.In other words, the direction of the prism of second spectro-film and described direction of light are not parallel.Thus, light leakage effect and light propagation effect obtain balance well, so the thickness of optical guide unit can easily reduce.The direction of the prism of second spectro-film and the angle between the direction of light are not equal to 0, that is, this both direction is not parallel mutually.In general, in the such scope of angle between 40 ° and 90 °.
In the third embodiment of the present invention, the prismatic surfaces of first spectro-film is placed to towards the outside in photoconduction space, and the direction of the prism of first spectro-film is parallel with direction of light, and the direction of the prism of second spectro-film is also parallel with direction of light.In this embodiment, the relative structure of two spectro-films forms as follows.In other words, as shown in Figure 3, two spectro-films are arranged like this: the height in photoconduction space (along the size of thickness direction) reduces to leaving mouthful distal-most edge from the opening (30) in first edge of film.The prismatic surfaces of second spectro-film is placed to towards the outside in photoconduction space.Thus, light leakage effect and light propagation effect obtain balance well, and therefore the thickness of optical guide unit can easily reduce.
In general, the prismatic surfaces that is configured to first spectro-film is placed to towards the outside in photoconduction space, and all parallel with the direction of light structure of the direction of the prism of two spectro-films, is disadvantageous for increasing the light leakage effect.Yet when two spectro-films are relatively arranged as described above, and the vertical cross-section in photoconduction space can be avoided such shortcoming when being the form of wedge.
Compare with the foregoing description, the prismatic surfaces of first spectro-film can be placed to towards the inboard in photoconduction space.In this case, the shape of the three-dimensional structure of second spectro-film and prism can form as follows.
In the fourth embodiment of the present invention, the prismatic surfaces of first spectro-film is placed to towards the inboard in photoconduction space, and the prismatic surfaces of second spectro-film is placed to towards the outside in photoconduction space.Thus, light leakage effect and light propagation effect obtain balance well, and therefore the thickness of optical guide unit can easily reduce.
In this embodiment, the direction of the prism of second spectro-film is preferably parallel with direction of light basically.Therefore, even the height that has when the photoconduction space is 30mm or more hour, light leakage effect and light propagation effect obtain balance easily.
In this 4th embodiment, the prism direction of first spectro-film and the angle between the direction of light are preferably in the scope between 40 ° and 90 °.Therefore, even the height that has when the photoconduction space is 20mm or littler, light leakage effect and light propagation effect obtain balance easily.
In the fifth embodiment of the present invention, the prismatic surfaces of first spectro-film is inboard the placement towards the photoconduction space, and the also inboard placement towards the photoconduction space of the prismatic surfaces of second spectro-film.In this embodiment, the direction of the prism of first spectro-film is not orthogonal to direction of light.In this case, the direction of the prism of first spectro-film and the angle between the direction of light are preferably in the scope between 30 ° and 60 °.Therefore, even the height that has when the photoconduction space is 30mm or littler, light leakage effect and light propagation effect obtain balance easily.From this point of view, the prism direction of first spectro-film and the angle between the direction of light are preferably in the scope between 40 ° and 50 °.
In this 5th embodiment, the prism direction of second spectro-film is basic parallel with the direction of light incident.The direction of the prism of first spectro-film and the angle between the direction of light are preferably in the scope between 30 ° and 60 °, and the direction of the prism of first spectro-film is parallel with direction of light basically.Therefore, even the height that has when the photoconduction space is 20mm or littler, light leakage effect and light propagation effect obtain balance easily.
In the sixth embodiment of the present invention, the prismatic surfaces of first spectro-film is inboard the placement towards the photoconduction space, and the also inboard placement towards the photoconduction space of the prismatic surfaces of second spectro-film, and the direction of the prism of first spectro-film is perpendicular to direction of light.In this case, the drift angle of the prism of first spectro-film is less than the drift angle of the prism of second spectro-film.Thus, light leakage effect and light propagation effect can obtain balance well.
Also in this embodiment, the prism direction of second spectro-film is preferably parallel with direction of light basically.Therefore, even the height that has when the photoconduction space is 30mm or littler, light leakage effect and light propagation effect obtain balance easily.
In this 6th embodiment, the drift angle of the prism of first spectro-film is preferably in the scope between 65 ° and 80 °, and the drift angle of the prism of second spectro-film is preferably in the scope between 80 ° and 95 °.
Be used for spectro-film of the present invention, a plurality of prisms extend along the length direction of prism, and parallel to each other.The shape on the top of each prism can be polygon or circle.
In order to improve the effect that light is propagated effectively, the top of prism preferably has the polygon of particular corner.In the situation on polygon top, its drift angle is usually from 60 ° to 100 °, preferably from 65 ° to 95 °, preferably from 70 ° to 90 °.
Be used for spectro-film of the present invention and make, preferably be at least 85%, preferably be at least 90% by polymkeric substance with penetrability of at least 80%.The penetrability here is the full impregnated luminosity that records according to JIS K7105.
The production of spectro-film can utilize a mould with given shape and structure corresponding with the shape of prism and structure to come shaped polymer.It is 1.4 to 1.9 high transparent polymkeric substance that the polymkeric substance of spectro-film of being used for being shaped preferably has refractive index, for example, acrylate copolymer, the epoxy resin acrylate copolymer that goes bad, polycarbonate, etc.
Under the situation that effect of the present invention does not weaken, the size of spectro-film is unrestricted.In general, the thickness of spectro-film (distance on the top from the plane surface to the prism) is from 50 μ m to 2mm.
The pitch of prism (distance between the adjacent top) is generally 0.020 to 0.5mm, preferably is 0.022 to 0.3mm, and the height of prism (between adjacent prisms and top the end of from height) is generally 0.01 to 1mm, preferably is 0.011 to 0.6mm.
According to spectro-film used in the present invention, the instantiation that can buy on the market comprises " BEF series ", " IDF series " and " TRAF " (all these products can be buied from Minnesota Mining and Manufacturing Company).
According to the present invention, area source can be assembled as above-mentioned traditional area source.In other words, except optical guide unit, the parts of area source can be identical with the parts of traditional area source.
For example, as light source, can use to have traditionally shaped light source, such as line style (shaft-like) light source, spherical light source etc.For instance, can use fluorescent tube, cold cathode ray tube, light emitting diode etc.
Except the light source that is arranged on the first opening vicinity that is formed on spectro-film one edge, an additional light source can be set near second opening at the distal-most edge place that is formed on spectro-film.In this case, the height in photoconduction space, from first opening to not changing basically at second opening from the first opening distal-most edge.In other words, the plane surface of two spectro-films is parallel to each other basically.
During light source assembling face to face, provide the frame or the box in an encirclement photoconduction space, like this, except the light emission surface of spectro-film, light can not leak from any part.In addition, a lighttight film such as reflectance coating can be arranged on the outside surface in second spectro-film (with respect to the photoconduction space).
As mentioned above, one of them first type surface of first spectro-film promptly, with respect to the outside surface in photoconduction space, is a light emission surface.
When turned around with back of the body surface on the surface of optical guide unit, like this, first spectro-film is treated to second spectro-film and vice versa, and some optical guide unit can have the structure that comprises in the above-described embodiments.In this case, the outside surface of second spectro-film can be used as light emission surface.
The area of light emission surface without limits.In the example of LCD, optical guide unit of the present invention can be used for having about 2cm on the one hand
2The LCD of screen, and can be used for about 1m on the other hand
2The LCD of giant-screen.
As mentioned above,, the height in photoconduction space be can reduce, the thickness of optical guide unit and the thickness of area source also can be reduced according to the present invention.The height in photoconduction space is generally 1 to 30mm, preferably is 2 to 20mm.
Here, the height in photoconduction space is in the opening part that is formed on first edge of film (the light source place is set) distance that record, between the first type surface of facing mutually of two spectro-films.When the prismatic surfaces of a spectro-film during towards photoconduction space inboard, the height in photoconduction space is the distance between the first type surface of the top of prism of a spectro-film and another spectro-film.When the prismatic surfaces of two spectro-films during all towards photoconduction space inboard, the height in photoconduction space is that top from the prism of a spectro-film is to the distance the top of the prism of another spectro-film.
Example
By following described, make the optical guide unit of example and comparative example.The planar dimension of spectro-film that is used for each example is as follows.The planar dimension that is used for the spectro-film of each example is 40mm * 40mm.
BEFII: spectro-film (brightness lifting film) " BEF II, 90/50 " can be buied from Minnesota Mining and Manufacturing Company.This film carries a plurality of parallelogram prisms on its prismatic surfaces, and the width of each prism is that a drift angle is 90 ° a isosceles triangle to xsect.Distance between the top of adjacent prisms (prism pitch) is 50 μ m, and the thickness of spectro-film (from the plane surface of film to the distance the top of prism) is 155 μ m.
TRAF: spectro-film " TRAF II " can be buied from Minnesota Mining and Manufacturing Company.This film carries a plurality of parallelogram prisms on its prismatic surfaces, and the width of each prism is that a drift angle is 70 ° a isosceles triangle to xsect.The prism pitch is 31 μ m, and the thickness of spectro-film is 145 μ m.
IDF20: spectro-film " IDF " can be buied from Minnesota Mining and Manufacturing Company.This film carries a plurality of parallelogram prisms on its prismatic surfaces, and the width of each prism is that a drift angle is 70.7 ° a triangle to xsect, and a base angle is 77.6 °, and another base angle is 31.7 °.The prism pitch is 50 μ m, and the thickness of spectro-film is 150 μ m.
When using this spectro-film that has unsymmetrical section along the Width of prism, when the arranged direction of prism and the incident direction of light were not parallel, light source can be faced in the either side plane of prism.In the face of the side plane of light source can be selected like this: light leakage effect and light propagation effect can obtain balance well.
In described below all examples, at example 4,7,12, in 20 and 24, spectro-film is arranged like this: in the face of light source, and in example 3 and 6, spectro-film is arranged like this corresponding to the side plane of the prism at big base angle (being 77.6 ° base angle in the example of IDF20): corresponding to the side plane of the prism of less base angle (being 31.7 ° base angle in the example of IDF20) in the face of light source.Only except towards the side surface difference of the prism of first spectro-film of light source, example 3 has identical structure with 16 area source.
Example 1 to 24
Optical guide unit with Fig. 3 structure is assembled as described below.The combination of the pattern of spectro-film and three-dimensional structure is shown in table 1 in each example.After this, lead the production stage of unit with reference to example 1 Mingguang City.
At first, BEF II (can buy from 3M company) as first spectro-film is placed on the light emitting side, like this, prismatic surfaces is faced the outside in photoconduction space (in table 1, with " O " sign (outside)), and be placed on back of the body face side as the BEF II of second spectro-film, like this, prismatic surfaces is in the face of the inboard (in table 1, with " I " sign (inboard)) in photoconduction space.One opening is formed on an edge of two spectro-films.Height in the photoconduction space that this opening part records is 4mm.Distal-most edge from the opening of two spectro-films is as far as possible closely set, so that they almost contact with each other.
In Fig. 3, the orientation of the prism of first spectro-film is perpendicular to the plane of paper, and the orientation of the prism of second spectro-film is parallel to the plane of paper.In other words, the direction of the prism of first spectro-film is perpendicular to the incident direction of sending light from light source (being masked as " H ") table 1, and the direction of the prism of second spectro-film is parallel to the incident direction (being masked as " V " table 1) of sending light from light source.
Except the combination of the pattern of using the spectro-film shown in the his-and-hers watches 1 and three-dimensional structure, each optical guide unit of other examples is assembled in the mode identical with example 1.
After each optical guide unit assembling of all examples, observe as follows to the propagation of light and the situation of leakage:
Optical guide unit is located in the darkroom, and four pointolites (LED) are arranged in parallel with opening and embark on journey, and luminous.Then, observe the situation of optical radiation and propagation from light emission surface.In all examples, four bright light streams of sending from LED light emission surface (first type surface of spectro-film) from first edge with light source to from light source continuous edge farthest move ahead.In other words, optical guide unit of the present invention has been arranged, light propagation effect and light leakage effect can obtain balance in thin photoconduction space, and according to the brightness of light source (illumination) etc., can realize desired photoemissive brightness and uniformity coefficient.
Comparative example 1
Except using two transparent acrylic resin films (not having prism on two surfaces) in the position of two spectro-films, the optical guide unit of this comparative example is assembled in the mode identical with example 1.
The optical guide unit that this comparative example has been arranged is observed the situation that light is propagated and light leaks in the mode identical with all examples.Then, illuminated brightly, and do not illuminated at all near the zone of distal-most edge near the zone at first edge (light source).In other words, because film does not have prism, so light leakage effect and light propagation effect can not obtain balance.
Comparative example 2
Except the three-dimensional structure of first spectro-film makes prismatic surfaces towards the outside, and the direction of prism parallel with the incident direction of light (with " VO " sign), and the three-dimensional structure of second spectro-film makes prismatic surfaces towards the outside, and outside the direction of prism parallel with direction of light (with " VI " sign), the optical guide unit of this comparative example is assembled in the mode identical with example 1.
The optical guide unit that this comparative example has been arranged is observed the situation that light is propagated and light leaks in the mode identical with all examples.Then, illuminated brightly, and do not illuminated at all near the zone of distal-most edge near the zone at first edge (light source).In other words, even use identical spectro-film, but their three-dimensional structure is incorrect, and light leakage effect and light propagation effect can not obtain balance.
(table 1)
| Instance number | First spectro-film | Second spectro-film | ||
| ?1 | ?BEF?II | ?HO | ?BEF?II | ?VO |
| ?2 | ?TRAF | ?HO | ?BEF?II | ?VO |
| ?3 | ?IDF?20 | ?HO | ?BEF?II | ?VO |
| ?4 | ?IDF?20 | ?HO | ?BEF?II | ?VO |
| ?5 | ?BEF?II | ?HO | ?BEF?II | ?VI |
| ?6 | ?TRAF | ?HO | ?VEF?II | ?VI |
| ?7 | ?BEF?II | ?HO | ?IDF?20 | ?HI |
| ?8 | ?BEF?II | ?HO | ?BEF?II | ?45I |
| ?9 | ?BEF?II | ?450 | ?BEF?II | ?VI |
| ?10 | ?BEF?II | ?450 | ?BEF?II | ?HI |
| ?11 | ?BEF?II | ?VO | ?BEF?II | ?45I |
| ?12 | ?BEF?II | ?VO | ?IDF?20 | ?HO |
| ?13 | ?BEF?II | ?VO | ?BEF?II | ?HI |
| ?14 | ?TRAF | ?VO | ?BEF?II | ?HI |
| ?15 | ?IDF?20 | ?VO | ?BEF?II | ?HI |
| ?16 | ?BEF?II | ?BO | ?IDF?20 | ?HI |
| ?17 | ?BEF?II | ?VO | ?BEF?II | ?VO |
| ?18 | ?BEF?II | ?HI | ?BEF?II | ?VO |
| ?19 | ?TRAF | ?HI | ?BEF?II | ?VO |
| ?20 | ?IDF?20 | ?HI | ?BEF?II | ?VO |
| ?21 | ?BEF?II | ?45I | ?BEF?II | ?VO |
| ?22 | ?BEF?II | ?45I | ?BEF?II | ?VI |
| ?23 | ?TRAF | HI | ?BEF?II | ?VI |
| ?24 | ?IDF?20 | ?HI | ?BEF?II | ?VI |
Annotate:
H: perpendicular to the direction of sending the prism of direction of light from light source.
V: be parallel to the direction of prism of sending the incident direction of light from light source.
45: the direction of prism tilts 45 ° with respect to the incident direction of sending light from light source.
I: prismatic surfaces is towards the inboard in photoconduction space.
O: prismatic surfaces is towards the outside in photoconduction space.
Claims (6)
1. an optical guide unit (6), it comprises one first spectro-film (1) and one second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) arrange like this, that is, and first edge (11 of described spectro-film, 21) be provided with parallel to each other basically, and between them, stay a gap forming an opening, and a photoconduction space, it is continuous from the described opening that is formed between the described spectro-film, and the equal or reduction of the height in the described photoconduction space at the edge, distant place of described spectro-film from described opening to relative this described opening, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, and the described prismatic surfaces of described first spectro-film (1) is placed towards the outside in described photoconduction space, and the direction of the direction of the described prism of described first spectro-film (1) and described light is not parallel.
2. an optical guide unit (6), it comprises first spectro-film (1) and second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) arrange like this, that is, and first edge (11 of described spectro-film, 21) be provided with parallel to each other basically, and between them, stay a gap forming an opening, and a photoconduction space, it is continuous from the described opening that is formed between the described spectro-film, and the equal or reduction of the height in the described photoconduction space at the edge, distant place of described spectro-film from described opening to relative this described opening, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, and the described prismatic surfaces of described first spectro-film (1) is placed towards the outside in described photoconduction space, and the direction of the described prism of described first spectro-film (1) is parallel with the direction of described light, and
The direction of the described prism of described second spectro-film (2) is not parallel with the direction of described light.
3. an optical guide unit (6), it comprises first spectro-film (1) and second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) are arranged like this, that is, first edge (11,21) of described spectro-film is provided with basically parallel to each other, and between them, staying a gap to form an opening and a photoconduction space, it is continuous from the described opening that is formed between the described spectro-film, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, the described prismatic surfaces of described first spectro-film (1) is placed towards the outside in described photoconduction space, and the direction of the described prism of described first spectro-film (1) is parallel with the direction of described light, the described prismatic surfaces of described second spectro-film (2) is placed towards the outside in described photoconduction space, and the direction of the described prism of described second spectro-film (2) is parallel with the direction of described light, and
Described two spectro-films (1,2) are arranged like this, that is, the edge, distant place of the described spectro-film of the height in described photoconduction space from described opening to relative this opening reduces.
4. an optical guide unit (6), it comprises first spectro-film (1) and second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) arrange like this, that is, and first edge (11 of described spectro-film, 21) be provided with parallel to each other basically, and between them, stay a gap forming an opening, and a photoconduction space, it is continuous from the described opening that is formed between the described spectro-film, equal or the reduction of the height in the described photoconduction space at the edge, distant place of spectro-film from described opening to described relatively opening, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, the described prismatic surfaces of described first spectro-film (1) is placed towards the inboard in described photoconduction space, and the described prismatic surfaces of described second spectro-film (2) is placed towards the outside in described photoconduction space.
5. an optical guide unit (6), it comprises first spectro-film (1) and second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) arrange like this, that is, and first edge (11 of described spectro-film, 21) be provided with parallel to each other basically, and between them, stay a gap forming an opening, and a photoconduction space, it is continuous from the described opening that is formed between the described spectro-film, equal or the reduction of the height in the described photoconduction space at the edge, distant place of spectro-film from described opening to described relatively opening, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, to launch from the light of described opening to described photoconduction spatial transmission, and the described prismatic surfaces of described first spectro-film (1) is placed towards the inboard in described photoconduction space, and the described prismatic surfaces of described second spectro-film (2) is also placed towards the inboard in described photoconduction space, and
The orientation of the described prism of described first spectro-film (1) is not orthogonal to the incident direction of described light.
6. an optical guide unit (6), it comprises first spectro-film (1) and second spectro-film (2), each spectro-film has two first type surfaces, one of them is a prismatic surfaces, described prismatic surfaces is carried a plurality of prisms, and they are arranged mutually substantially parallel along the length direction of prism
Wherein, described two spectro-films (1,2) arrange like this, that is, all first edges (11,21) of described spectro-film are provided with basically parallel to each other, and between them, stay a gap to form an opening, be formed between described all spectro-films from the continuous photoconduction space of described opening, the equal or reduction of the height in the described photoconduction space at edge, distant place from described opening to described relatively opening, and
First type surface towards described first spectro-film (1) in the described photoconduction space outside is a light emission surface, with emission from the light of described opening to described photoconduction spatial transmission,
It is characterized in that, the described prismatic surfaces of described first spectro-film (1) is placed towards the inboard in described photoconduction space, and the described prismatic surfaces of described second spectro-film (2) is placed towards the inboard in described photoconduction space, and the orientation of the described prism of described first spectro-film (1) is perpendicular to the described incident direction of described light, and
The drift angle of described prism that is described first spectro-film (1) is less than the drift angle of the described prism of described second spectro-film (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP225276/2000 | 2000-07-26 | ||
| JP2000225276A JP4485026B2 (en) | 2000-07-26 | 2000-07-26 | Light guiding unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1444711A CN1444711A (en) | 2003-09-24 |
| CN1211675C true CN1211675C (en) | 2005-07-20 |
Family
ID=18719076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018133657A Expired - Fee Related CN1211675C (en) | 2000-07-26 | 2001-07-20 | Hollow surface illuminator |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1303725A2 (en) |
| JP (1) | JP4485026B2 (en) |
| KR (1) | KR20030026325A (en) |
| CN (1) | CN1211675C (en) |
| AU (1) | AU2001282930A1 (en) |
| TW (1) | TW512292B (en) |
| WO (1) | WO2002008663A2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1440346A1 (en) * | 2001-11-02 | 2004-07-28 | Honeywell International Inc. | Hollow wedge shape light guide for back illumination |
| JP4273002B2 (en) * | 2002-03-28 | 2009-06-03 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Compact lighting system and display device |
| US7223005B2 (en) | 2003-12-23 | 2007-05-29 | Lamb David J | Hybrid lightguide backlight |
| US7303322B2 (en) | 2003-12-23 | 2007-12-04 | 3M Innovative Properties Company | Multiple lightguide backlight |
| US20060221610A1 (en) * | 2005-04-01 | 2006-10-05 | Chew Tong F | Light-emitting apparatus having a plurality of overlapping panels forming recesses from which light is emitted |
| KR100781350B1 (en) | 2005-12-26 | 2007-11-30 | 주식회사 바다테크 | High Brightness Back Light Device |
| KR20070096457A (en) * | 2006-03-24 | 2007-10-02 | 엘지전자 주식회사 | Planar light source using a light pipe, back light unit and liquid crystal display having the same |
| EP2487535A1 (en) * | 2007-05-20 | 2012-08-15 | 3M Innovative Properties Company | Design parameters for backlights, which have a thin hollow cavity and recycle the light |
| US9541698B2 (en) * | 2008-02-22 | 2017-01-10 | 3M Innovative Properties Company | Backlights having selected output light flux distributions and display systems using same |
| JP2011134481A (en) * | 2009-12-22 | 2011-07-07 | Lecip Holdings Corp | Lighting system |
| KR101037514B1 (en) * | 2010-07-30 | 2011-05-26 | 변종익 | A removal apparatus for textile dust |
| CN104597555B (en) * | 2014-12-02 | 2019-01-15 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787708A (en) * | 1987-05-08 | 1988-11-29 | Tir Systems Ltd. | Apparatus for continuously controlled emission of light from prism light guide |
| JP3391483B2 (en) * | 1992-11-20 | 2003-03-31 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | light box |
| JP3362900B2 (en) * | 1993-03-09 | 2003-01-07 | 富士通株式会社 | Surface emitting device |
| JPH11142845A (en) * | 1997-11-07 | 1999-05-28 | Toshiba Corp | Back light unit and liquid crystal display device having the unit |
-
2000
- 2000-07-26 JP JP2000225276A patent/JP4485026B2/en not_active Expired - Fee Related
-
2001
- 2001-07-20 CN CNB018133657A patent/CN1211675C/en not_active Expired - Fee Related
- 2001-07-20 EP EP01961683A patent/EP1303725A2/en not_active Withdrawn
- 2001-07-20 KR KR10-2003-7001127A patent/KR20030026325A/en not_active Application Discontinuation
- 2001-07-20 WO PCT/US2001/023022 patent/WO2002008663A2/en not_active Application Discontinuation
- 2001-07-20 AU AU2001282930A patent/AU2001282930A1/en not_active Abandoned
- 2001-07-25 TW TW090118188A patent/TW512292B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TW512292B (en) | 2002-12-01 |
| WO2002008663A2 (en) | 2002-01-31 |
| JP2002050220A (en) | 2002-02-15 |
| AU2001282930A1 (en) | 2002-02-05 |
| WO2002008663A3 (en) | 2002-05-30 |
| CN1444711A (en) | 2003-09-24 |
| EP1303725A2 (en) | 2003-04-23 |
| KR20030026325A (en) | 2003-03-31 |
| JP4485026B2 (en) | 2010-06-16 |
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