CN1873526A - Directional screen and image projection system - Google Patents
Directional screen and image projection system Download PDFInfo
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- CN1873526A CN1873526A CNA2006100923534A CN200610092353A CN1873526A CN 1873526 A CN1873526 A CN 1873526A CN A2006100923534 A CNA2006100923534 A CN A2006100923534A CN 200610092353 A CN200610092353 A CN 200610092353A CN 1873526 A CN1873526 A CN 1873526A
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- Overhead Projectors And Projection Screens (AREA)
Abstract
This invention provides a directional screen which can efficiently converge light from a projector on an observer and which is hardly affected by external light. That is, multiple transparent protrusion structures are formed on a base material, and a light absorbing layer communicating in the vertical direction of each of the protrusion structures is provided. The formation of a recess structure or a through-hole exerts an effect similar to that of a protrusion structure. Alternatively, fibrous protrusions each having a high light reflectance are used as the protrusion structures, and are densely formed on the base material while they are slanted in the direction of external light.
Description
Technical field
The present invention relates to a kind of directional screen, this screen display is by the optical imagery of projector projections such as for example liquid crystal projection apparatus; Relate to a kind of image projection system in addition, it uses described screen to come display image.
Background technology
Because image projection system, for example can on giant-screen, demonstrate the image of high definition simply, so this system has been widely used as the instrument of transmission information by many users by the similar articles that use high strength CRT to come projection arrangement, the liquid crystal projection apparatus of projection optics image or to be used for display image.The idea of the screen of some relevant projector has been proposed, for example: by improving the utilization ratio of light, and improve the visibility of big audience to cause light diffusion by on screen surface, scattering globule with white material or with the surface of light reflective film cover screen with high luminous reflectivity.In addition, described in JP2002-169224A, screen surface has for example orienting reflex structure of biconvex lens, so that image can be shown to big audience effectively.
Although traditional screen with directivity is owing to the optical convergence that the cause of its directivity makes it possible to will to come from effectively the projected image of projector is located spectators, however extraneous light for example the influence of illumination light will improve the brightness on the surface of described screen greatly.Therefore, will there be a problem in described screen, promptly is difficult in and demonstrates distinct image in the bright room.
Summary of the invention
Because aforementioned content an object of the present invention is to provide a kind of directional screen, its optical convergence that can effectively projector be sent locates and is subjected to hardly the influence of exterior light spectators.
Directional screen of the present invention reflects the light that comes from a specific direction or transmission is observed side so that this ray guidance is arrived, and described screen absorbs the light that comes from outside the described specific direction.That is to say, the light absorber that described screen comprises a plurality of transparent parts and centers on the thickness direction setting of each transparent part, whereby, described screen will come from the ray guidance of specific direction to the observation side, and absorb the light that comes from outside the described specific direction., described transparent part is set herein in base material, described light absorber is set at the inside surface of each transparent part.
In addition, described base material is made by light absorbing material, and forms described transparent part in described base material.As selection, described base material can also be made by transparent material, and forms described transparent part in described base material.
Each described transparent part can adopt recessed structures or through hole, on the inside surface of the vertical direction of described recessed structures or through hole described light absorber is set.As selection, can on described base material, form transparent bulge-structure as described transparent part, in the side of each described bulge-structure described light absorber is set.Each described bulge-structure can be cylindricality or can be the linear moment body.
In addition, on the surface of described base material, do not form in the zone of transparent part second light absorbing zone is set.In addition, in the rear surface of described base material side reflection layer is set.When forming recessed structures as transparent part on described base material, light reflection structure can be arranged on the bottom surface of described recessed structures.
Selectively, can direct into spectators here so that will come from the light reflection or the transmission of specific direction, and absorb the light that comes from outside the described specific direction with the fabric that obtains by braiding warp thread and weft yarn as base material of the present invention.Be combined with the photoconduction staple fibre in described fabric by this way, this mode is: the residing direction of the end face of described photoconduction staple fibre is in fact perpendicular to the surface of described fabric.
Described photoconduction staple fibre comprises center section and periphery, and the reflection coefficient of this periphery is higher than the reflection coefficient of center section.In addition, described photoconduction staple fibre is coated with light absorbing zone.In the inside of described photoconduction staple fibre along this photoconduction staple fibre photo-absorption region is set vertically.
In addition, described image projection system of the present invention comprises directional screen with above-mentioned arbitrary structure and is used for the optical image projection instrument of optical image projection to the described directional screen.
Selectively, screen of the present invention has a plurality of fibrous projection that is formed on the base material, and each projection all has light reflective, the externally direction of the light setting that tilts of described a plurality of fibrous protrusions.The result is that described screen is used to reflect or transmission comes from the light of specific direction, and is used to absorb the light that comes from outside the described specific direction.Specifically, the fibrous protrusions with high luminous reflectivity is formed on the described base material thick and fast, the externally direction of the light setting that tilts of described projection simultaneously.By such structure, the light that comes from projector is reflected on the surface of each fibrous protrusions.In addition, for example the exterior light of illumination light enters in two gaps between the adjacent fiber shape projection, and is reflexed to repeatedly on the side of described fibrous protrusions to be absorbed.Therefore, described screen is subjected to the influence of exterior light hardly, and even can demonstrate clearly image in bright room.
In addition, on the surface of the base material of described screen, form light absorbing zone.Because exterior light is absorbed by the guiding of the surface of described base material, so above-mentioned structure has reduced the influence of the exterior light on the side of inciding each fibrous protrusions on the described screen.
In addition, described base material is the black fabric, and this fabric is to obtain by the fiber that braiding is full of black pigment or dyestuff.When insert white fiber on described black fabric after, described white fiber is arranged to form described fibrous protrusions with predetermined direction.The result is, screen of the present invention can make with low cost, to such an extent as to and this screen very soft its can be wound or be folding.
In addition, by in can light absorbing resin base material, embedding on the bias and the fixing described fibrous protrusions of being made up of white fiber forms described screen.Then, described screen is formed by this way, that is: the vergence direction of each fibrous protrusions conforms to the direction of extraneous light in fact.Adopt this structure, the length of the part by regulating each fibrous protrusions for example from described resin base material, expose, the packed density of fibrous protrusions, and the thickness of each fibrous protrusions can easily be regulated gain.In addition, owing to exterior light can be absorbed by base material, so can obtain to resist the screen in daytime (bright screen) of extraneous light.
In addition, each row in the fibrous protrusions row all are to combine with an end of another projection by any one the end with a plurality of fibrous protrusions to constitute, and each is listed as by forming and have a V-arrangement cross section in bossing and coupling part; This fibrous protrusions row are arranged on the base material thick and fast, vertically being in line in the following manner of described each coupling part, and promptly the direction of each fibrous protrusions is the direction of extraneous light.In addition, described fibrous protrusions is flat fibrous protrusions.Using fibrous protrusions to be listed as can be so that the manufacturing of screen be more easy.In addition, it is long-pending to use flat fibrous protrusions can increase light reflection surface.Thereby can improve the screen gain, and can on the planar substrates material, form string (string) structure at an easy rate.
In addition, constitute the back side of described flat fibrous protrusions of described fibrous protrusions row and the surface of described coupling part and all have the light absorption structure.By adopting such structure, because coming from the light of projector is reflected on the surface of each fibrous protrusions, and meanwhile, exterior light has been absorbed effectively by described light absorption structure, so can obtain the screen in daytime that influenced by exterior light.
Description of drawings
In the accompanying drawings:
Fig. 1 shows the skeleton view according to screen of the present invention;
Fig. 2 shows the sectional view according to screen of the present invention;
Fig. 3 shows the sectional view according to screen of the present invention;
Fig. 4 shows the sectional view according to screen of the present invention;
Fig. 5 shows the sectional view according to screen of the present invention;
Fig. 6 shows the outside drawing according to screen of the present invention;
Fig. 7 shows the outside drawing according to screen of the present invention;
Fig. 8 shows the part amplification profile of screen of the present invention;
Fig. 9 shows the synoptic diagram of the photoconduction staple fibre that uses in the screen of the present invention;
Figure 10 shows the synoptic diagram of the photoconduction staple fibre that uses in the screen of the present invention;
Figure 11 shows the sectional view according to screen of the present invention;
Figure 12 shows the sectional view according to screen of the present invention;
Figure 13 shows the skeleton view of screen of the present invention;
Figure 14 shows the skeleton view according to the example of screen of the present invention;
Figure 15 shows the sectional view according to the example of screen of the present invention;
Figure 16 A and 16B show the synoptic diagram according to the example of screen of the present invention.
Embodiment
Screen of the present invention is such screen: its reflection or transmission come from the light of specific direction, and absorb the light that comes from outside the described particular light ray.Specifically, on base material, form a plurality of transparent bulge-structures, recessed structures or through hole, be provided with (communicating) light absorption structure that on each vertical direction of described bulge-structure, recessed structures or through hole, communicates in addition.By adopting this structure, because the light that comes from projector can be reflected or transmission and exterior light can be absorbed, so described screen is subjected to for example influence of the exterior light of illumination light hardly, even and in bright room this screen also can demonstrate distinct image.
In addition, can be reflected or be transmitted to spectators effectively here so come from the light of projector by the external diameter of regulating described bulge-structure, recessed structures or through hole and the directivity of highly coming accommodation reflex light or transmitted light.
In screen of the present invention, the part that is not formed with described bulge-structure, recessed structures or through hole on a surface of described base material is provided with second light absorbing zone.By such structure, only reflection or absorb from specific direction and incide light on described bulge-structure, recessed structures or the through hole, the light that incides on any part except that said structure has been absorbed fully.Therefore, extraneous light has just reduced the influence of screen.At this moment, by regulating the reflected light or the transmission light intensity that density can be regulated the light that comes from projector at an easy rate that be provided with of described bulge-structure, recessed structures or through hole.
When the present invention adopted reflection type screen, the side of surface opposite that is formed with the base material of described bulge-structure or recessed structures on it was provided with reflection layer.Selectively, can light emission structure be set in the bottom surface of each recessed structures of base material.In addition, the side with substrate of through hole is provided with second base material that is formed with reflection layer on it.
As mentioned above, when light absorbing zone and reflection layer form simultaneously, described light absorbing zone is set in the zone that is not formed with bulge-structure, recessed structures or through hole on screen of the present invention.When the present invention adopts reflection type screen, this structure will improve gain significantly.In addition, described screen has light absorbing zone, and whereby, described screen can not influenced by exterior light, even and also can obtain distinct image when under lighting condition image being carried out projection.
In addition, can be with the fabric that obtains by braiding warp thread and weft yarn as base material of the present invention, and be combined with the photoconduction staple fibre as bulge-structure in described fabric by this way, this mode is: two end face is in fact the direction perpendicular to the surface of described fabric.In addition, described photoconduction staple fibre is coated with light absorbing zone, perhaps along this photoconduction staple fibre photo-absorption region is set vertically in the inside of described photoconduction staple fibre.Described photoconduction staple fibre is made by such material, in this material, is higher than the reflection coefficient of epidermis part along the reflection coefficient of the center section longitudinally of described fiber.By such structure, can in predetermined angular range, penetrate from the light of a surface feeding sputtering of described photoconduction staple fibre from the other end, the light that is incident on the side of described photoconduction staple fibre can be absorbed.Therefore, reflected with predetermined angular range on an end face of described photoconduction staple fibre owing to come from the light of projector, and for example the exterior light of illumination light is absorbed, so even in bright room, also can projection go out distinct image.
In addition, reflecting material is arranged as the warp thread of the fabric of base material and at least one the surface coverage in the weft yarn, for example silver or Chinese white or silver-colored line, at least one in warp thread and the weft yarn used white line or analog.The result is, even the light that comes from the surface reflection of described base material also can be used for the projection projector image.
In addition, by the back side at described fabric be provided with white or silver color reflecting plate can so that even the light that transmission is come in the slit between fabric fibre also can be effectively utilized.As a result, can obtain brightness improving screen.
Figure 13 shows the basic structure of the screen with fibrous protrusions.As shown in FIG., tiltedly be provided with fibrous protrusions in base material 3 updips.Described fibrous protrusions can only be to be obliquely installed basically, and must arrange in a line.In addition, described fibrous protrusions 41 externally the direction of light incident tilt.For example, when lighting device was positioned on the ceiling, described projection tilted in the direction that makes progress of screen.Any material is polymeric membrane, board-like material, fabric or sheet metal etc. for example, as long as it is flat, then all can be used as base material 3.In addition, described base material 3 has the light absorption surface, and each described fibrous protrusions all has light reflective surface, and this reflecting surface is a white or transparent, or has for example metallochrome.
By this structure, be reflected in the side of each fibrous protrusions 41 from projector (not shown) image projected.Therebetween, the extraneous light of the lighting device incident from the ceiling for example passes the slit of 41 of two adjacent fiber shapes projectioies and is absorbed by the surface of base material 3.Even when the surface of described base material 3 is white, also can make described exterior light be absorbed by the described exterior light of interreflection on the side of fibrous protrusions 41.
In many cases, the surface of each fibrous protrusions 41 has irregular, uneven shape, so the microcosmic surface of described fibrous protrusions is towards a plurality of directions.The result is that the image that comes from projector was scattered before entering spectators' eyes.Even when described fibrous protrusions is made of smooth, smooth surface, because their knobs are to different directions, so described fibrous protrusions equally also can show scattering properties.Therefore, can watch the projected image that comes from projector in visual angle leniently.Because described image can not be subjected to the influence of exterior light, so described image can become a distinct image, wherein, come from projector projected image intrinsic contrast be reflected.In addition, when density is set increases of described fibrous protrusions, can project image with natural look of having improved.
In addition, described base material can adopt the black fabric, and this black fabric is to obtain by the fiber that braiding is full of black pigment or dyestuff.When described white fiber is arranged in delegation on predetermined direction, on described black fabric, insert white fiber as fibrous protrusions.Selectively, described base material can be made of light absorbing resin base material, and the white fiber that inserts on described resin base material medium dip ground is used as fibrous protrusions.
In addition, each fibrous protrusions constitutes by bossing and the coupling part that is connected on the base material, a plurality of fibrous protrusions assign to be connected to each other the fibrous protrusions row that have array structure with formation by their connecting portion, a plurality of fibrous protrusions row are arranged in such a way, that is: the coupling part of a plurality of fibrous protrusions vertically arranges in a line.In addition, each fibrous protrusions all has flat shape, and the surface of each fibrous protrusions on projection side all has high reflectivity, and the back side of each fibrous protrusions all has light absorbing characteristic.In addition, the surface of each coupling part all has light absorbing characteristic.
[embodiment 1]
Fig. 1 shows the skeleton view of the basic structure of the screen that present embodiment is described.As shown in FIG., the screen of present embodiment has a plurality of protruding 1 as the bulge-structure that is formed on the base material 3.On the side of each projection 1, be formed with light absorbing zone 2.Herein, each described protruding 1 all has the transparent cylindrical structure.The upper surface of each projection 1 be shaped as circle, but it must not be circular.Described upper surface shape can also be ellipse, polygon or irregular shape.In the present embodiment, for example clear manufacturing is easy to rounded upper surface the most.
Illustrate when the proterties of in the base material 3 of Fig. 1, using the transparent material time below with reference to Fig. 2.Fig. 2 shows the cross-section structure of the screen of present embodiment.Herein, the screen with the explanation present embodiment is the situation of rear screen as translucent screen.The throw light that comes from the projector (not shown) is from base material 3 side incidents.Certainly, described throw light can be from the back surface incident of base material, but the surface that is formed with projection 1 on it will more desirable, and described projection sensing is subjected to exterior light to influence that bigger side.When described projection light is incident on each projection 1, and when not impacting the described light absorbing zone 2 that forms on the side of described projection as light beam 23, described light in fact can transmission.When described projection light is incident on two slits between the adjacent projection, and when not impacting light absorbing zone 2 on the side of each projection 1 as light beam 22, described projection light in fact also can transmission.On the other hand, be incident on each projection 1 and the light that impacts described light absorbing zone 2 as light beam 21 will be absorbed by described light absorbing zone 2, therefore, it can not penetrate described screen.Same, be incident on two slits between the adjacent projection 1 and the light that impacts described light absorbing zone 2 as light beam 20 can not penetrate described screen.As mentioned above, the screen of present embodiment is a directional screen, and its transmission is the light of incident at a predetermined angle, and not transmission other light except that above-mentioned light.Can come the angle of described transmitted ray is regulated arbitrarily up to the mean diameter of the height on the top of each projection 1, described projection and the density that is provided with of described projection from base material 3 sides according to measured.
Fig. 2 shows base material 3 and projection 1 integrally formed situation.Described protruding 1 can be used as independent structure forms on described base material 3.When wanting the whole described base material 3 and described protruding 1 time that forms, can adopt jet moulding, press molding method, die casting forming method or similar method.Described protruding 1 the time when on described base material 3, forming, can take printing or optical processing.
Fig. 3 shows a structure, wherein on a side surface of being formed with of base material 3 described protruding 1 second light absorbing zone 4 is set.Same material can be adopted in described second light absorbing zone 4 and the light absorbing zone 2, also different materials can be adopted.By this structure, the light that light beam 24 in the image pattern 3 or light beam 25 absorbs from the back surface incident of base material 3 and by light absorbing zone 2 or second light absorbing zone 4 like that can transmission, is incident on each projection 1 as light beam 26 and the light that is directly penetrated can transmission and only have.In this case, the optical transmission rate that comes from projector, i.e. the aperture area of the brightness of screen and each projection 1 is proportional, therefore, in order to obtain screen in daytime (bright screen), lip-deep protruding 1 that density is set is preferably big as much as possible.On the other hand, except a part was reflected by each raised surface, the overwhelming majority of exterior light can be absorbed, and therefore can throw the picture rich in detail with low black-level.For the influence of the lip-deep reflection that reduces each projection 1, the shape of the opening portion of each projection 1 can be made as convex lens shape or concavees lens shape, or the surfaceness of regulating the opening of each projection 1.In Fig. 3, described protruding 1 the surface that is formed with of described base material 3 is provided with second light absorbing zone 4.Yet, when forming at the back side of described base material 3, described light absorbing zone 4 can be set on the rear side of described base material 3 with the corresponding light opening of each projection 1.
[embodiment 2]
Fig. 4 shows the cross-section structure of the screen of present embodiment.In the present embodiment, described screen is that forth screen constitutes by reflection type screen.In the present embodiment, forming on base material 3 situation shown in Figure 2 after a plurality of protruding 1 resembling, is on the back side of base material reflection layer 5 to be set on that surface that does not form projection 1 of base material 3.By this structure, the throw light 29 or 30 with certain crevice projection angle scope is injected the inside of each projection 1 or base material 3, is reflexed in spectators' the visual field by reflection layer 5 then.On the other hand, the incident angle of the light except the throw light that comes from projector is greater than the incident angle of throw light, and as for example light beam 27 or 28, this light is incident on the described screen obliquely.In this case, because the light absorbing zone 2 that described light is directly formed on the side of each projection 1 has absorbed (light beam 27), perhaps reflected and once absorbed (light beam 28) then by light absorbing zone 2, so almost there is not light to arrive in spectators' the eye by reflection layer 5.As mentioned above, the forth screen of present embodiment can be subjected to the influence of exterior light hardly and demonstrate distinct image.At this moment, the height by regulating each projection 1 and the thickness of diameter and base material can reflect described projection light effectively.For example, in order to reflect following light effectively, this light has ± 30 ° or more low-angle incident angle, this incident angle is for the lip-deep vertical line of described screen, described protruding 1 mean diameter can be made as ideally 5.4 to 5.8 times of following distance, this distance is that open surfaces from each projection 1 is to the distance the bottom surface of base material 3.In order to reflect following light effectively, this light has ± 45 ° or more low-angle incident angle, this incident angle is for the lip-deep vertical line of described screen, described protruding 1 mean diameter can be made as ideally 3.5 to 4 times of following distance, this distance is that open surfaces from each projection 1 is to the distance the bottom surface of base material 3.
Fig. 5 shows a structure, wherein on a side surface of being formed with of base material 3 described protruding 1 second light absorbing zone 4 is set.By this structure, have only the light that resembles on the open surfaces that incides each projection 1 light beam 33 at a predetermined angle can arrive reflection layer 5 and reflected regularly, and penetrate once more from described protruding 1 open surfaces.On the other hand, be incident on light on the open surfaces of each projection 1 with the incident angle greater than the incident angle of particular light ray and impact on the described light absorbing zone 2 or second light absorbing zone 4 and be absorbed, therefore, it can not appear on the front surface side of described screen.That is to say, will inevitably be absorbed by the light absorbing zone 2 or second light absorbing zone 4 because resemble the light that is incident on the position except the open surfaces of each projection 1 light beam 31 or 32, so this light can not be reflected.The HD image with low black-level as mentioned above, can influence projected image, so can be projected onto on the screen of present embodiment because have only by the open surfaces reflected outside light of each projection 1.
With the same about the structure of Fig. 3, in this case, in order to increase the gain of the projected image that comes from projector, preferably increase the packed density of described projection in the following manner, this mode is: total aperture area of described projection is increased to degree as much as possible.
Herein, can be by applying or print the polymer adhesive that is mixed with white pigment, or by using silver, aluminium or their compound and relying on chemical vapour deposition to form described reflection layer 5.Selectively, can form reflection layer being different from another base material of described base material 3, the surface of this base material can be provided with near base material 3, and the side that faces base material 3 on this surface forms described reflection layer.In addition, before use, base material 3 also can mix with white pigment or analog to increase its reflectivity itself, perhaps can use metallic film or sheet metal with high reflectance.
[embodiment 3]
Fig. 6 shows the outward appearance of the screen of present embodiment.In the present embodiment, on base material 3, form linear protrusion structure 61 concurrently.In addition, on the side of each linear protrusion structure 61, be formed with light absorbing zone 2.That is to say that the difference of present embodiment and embodiment 1 or embodiment 2 is the shape of bulge-structure.
The light on directly being incident on described light absorbing zone 2, but identical with the light of each linear protrusion structure 61 parallel incident with the performance of the light that is incident on common transparency carrier, reflecting plate or baffle, seem similarly to be on described surface, not form described linear protrusion structure 61.On the other hand, becoming the performance of the light of minute angle incident and the described light of Fig. 2 identical with the parallel direction of each linear protrusion structure 61, and described screen can play the effect of directional screen.When the angle of following direction increases, from the light quantity minimizing of described screen transmission, and the increase of the directivity of described screen, described direction wherein is: with the light incident direction of the directional correlation that is parallel to each linear protrusion structure.
When employing has the screen of this structure, can reduce for example influence of the exterior light of illumination light by being arranged in such a way described screen, this mode is: come from extraneous light incident direction light perpendicular to each linear protrusion structure 61 vertically.
In each the foregoing description, described base material 3 and light absorbing zone 2 comprise following material.That is: base material 3 can be film, thick tabular base material, fibrous base material or fabric.In addition, described base material 3 can be black, white or transparent.In addition, base material can also adopt polymer resin, for example: polyethylene terephthalate (PET) resin, polycarbonate (PC) resin, polymethylmethacrylate (PMMA) resin, Polyvinylchloride (PVC) resin, polystyrene resin, polyamide or cyclenes resin.Certainly, described base material can also adopt inorganic material, for example glass or metal.In addition, described light absorbing zone 2 can be by covering: the inorganic material that is mixed with the polymeric material of black pigment or black dyes or has a big optical absorption characteristics for example chromium forms.
[embodiment 4]
Fig. 7 shows the structure about present embodiment.Although present embodiment has the outward appearance different with the foregoing description, yet present embodiment has key concept same as the previously described embodiments.That is to say, in the present embodiment, corresponding with the base material 3 in the foregoing description by the fabric substrate material 9 that weft yarn 7 and warp thread 8 constitute.In addition, the photoconduction staple fibre 6 that is blended in the following manner in the described fabric substrate material 9 is corresponding with the projection 1 in the foregoing description, and this mode is: two end faces of each photoconduction staple fibre all are arranged in described fabric substrate material 9.In addition, at the back side of described fabric substrate material 9 reflection layer 10 is set.
In the present embodiment, on described fabric substrate material 9, each photoconduction staple fibre 6 is set by making the photoconduction staple fibre once pass (squeezed) each weft yarn 7.Certainly, as described later, each photoconduction staple fibre 6 also can repeatedly pass described weft yarn 7.Can be according to the warp thread 8 of described fabric substrate material 9 and the mesh-density of weft yarn 7, and each photoconduction staple fibre 6 passes the density that the number of times of described weft yarn 7 is regulated described photoconduction staple fibre 6.Certainly, each photoconduction staple fibre 6 also can pass each warp thread 8 rather than weft yarn 7.Described photoconduction staple fibre 6 preferably is set at irregular position.But in fact,, can described staple fibre be set with pre-defined rule in order to be easy to make.As mentioned above, even when described photoconduction staple fibre 6 is set with pre-defined rule, because therefore the two end portions of each photoconduction staple fibre 6, the interference of for example moire disturbance can be taken place hardly by irregular inclination.
For the effect of described screen is described, Fig. 8 shows the part magnification region of the screen of present embodiment.Described in figure, photoconduction staple fibre 6a/6b is linear, and it is to obtain by the surface that covers center section 12a/12b with epidermis part 13a/13b.Although be not clearly shown that among the figure, yet described in a preferred embodiment of back, on the surface of each photoconduction staple fibre 6 or in its internal partial, form light absorbing zone.Described center section 12a/12b is made by the material that its reflection coefficient is higher than the reflection coefficient of epidermis part 13a/13b.Light transmitting fiber is known fiber with such structure.For example quartz glass or PMMA constitute described light transmitting fiber by the material with good transfer coefficient.Those light transmitting fibers can be used as employed photoconduction staple fibre 6 in the screen of the present invention, but have than the optical loss or homogeneity optical loss or the homogeneity still less that are included in the light transmitting fiber.Therefore, for example, can adopt such structure, this structure by use based on fluorine (fluorine-based) resin for example tetrafluoroethene-perfluoroethylene ether multipolymer (perfluorovinyl ether copolymer) cover that the periphery of the polyamide that uses among each center section 12a and the 12b obtains.
For example, can easily obtain above-mentioned photoconduction staple fibre 6 by following manner, this mode is: cover center section 12a or 12b with epidermis part 13a or 13b, stretching product under heating condition is so that described product becomes the long fibre with predetermined fibre diameter, the long fibre that so generates is blended in the fabric substrate material 9, cut-out appears at the long fibre on the face side of described screen, prune have homogenising the product of cut surface length.
The left side of Fig. 8 has demonstrated an example, and wherein, each photoconduction staple fibre 6 passes (squeezed through) each warp thread once, and the right side of this figure has demonstrated an example, and wherein, each photoconduction staple fibre 6 passes described warp thread twice.When each photoconduction staple fibre 6 once passes warp thread, can increase the component density of described photoconduction staple fibre 6.On the other hand, when each photoconduction staple fibre 6 passed described warp thread 8 for twice, described photoconduction staple fibre can fall down from described fabric substrate material hardly.In addition, as shown in FIG., the fabric substrate material 9 and the described reflection layer 10 that wherein are mixed with described photoconduction staple fibre stick to each other by articulamentum 11.This articulamentum 11 not only is sticked together described fabric substrate material 9 with described reflection layer 10, but also avoids coming off of photoconduction staple fibre 6.The employing of above-mentioned photoconduction staple fibre 6 makes that making screen of the present invention becomes more simple, and described each photoconduction staple fibre all has fibre diameter arbitrarily, and it all is soft.
In the screen of present embodiment, almost in fact the light of incident vertically can be caught by spectators' eyes, and this light can penetrate two slits between the consecutive warp 8, and resemble and reflected by reflection layer 10 light beam 36.But the overwhelming majority that penetrates obliquely in the light beam in slit of 8 on two adjacent warp thread can be reflected by reflection layer 10, is absorbed by the lip-deep light absorbing zone of photoconduction staple fibre 6 then, so they can not arrive in spectators' the eye.On the other hand, as under common fibre-optic occasion, be directed into the inside of described photoconduction staple fibre 6, and penetrate with the eye that enters spectators from another open surfaces from the light beam 34 or 35 of any one open surfaces incident of each photoconduction staple fibre 6.As mentioned above, be obliquely installed the both ends of each photoconduction staple fibre 6 brokenly according to certain angular distribution.Therefore, light is incident and outgoing in a scope, and this scope is consistent with the angular distribution at the both ends of each photoconduction staple fibre 6.That is to say that the screen shown in the present embodiment also can play the effect of directional screen.
Each warp thread that can be by will constituting described fabric substrate material 9 and the color change of weft yarn are black or white, perhaps have for example silver-colored line of line of high reflectance is regulated described screen as described warp thread and weft yarn reflection characteristic by employing.
(specific embodiment 1)
Fig. 9 shows the structure of the photoconduction staple fibre 6 that uses in the present embodiment.Described in figure, in the center section 13a of described photoconduction staple fibre, use polyamide, in epidermis part 12a, use the cellulose acetate resin.Reflection coefficient high about 0.25 as the reflectance ratio center section 13a of the epidermis part 12a of periphery.The diameter of described center section is approximately 30 μ m, and the thickness of epidermis part is approximately 50 μ m.The external diameter of described photoconduction staple fibre 6 can freely change between the 1mm at 20 μ m.The preferably thick as far as possible resolution to image to be throwed of described external diameter can be not impaired and the degree that can not complicate to the mixing of described staple fibre in the fabric substrate material.
In addition, the surface coverage of described epidermis part 12a has the PET resin, is mixed with the carbon pigment in this resin and has the thickness of about 10 μ m.The described screen of the above-mentioned photoconduction staple fibre 6 of the use shown in the present embodiment has good orienting reflex characteristic.In addition because described screen is subjected to the influence of exterior light hardly, so even under lighting condition projects images, described screen also can provide clearly image.
(specific embodiment 2)
Figure 10 shows the another kind of structure of the photoconduction staple fibre 6 that uses in the screen of present embodiment.Identical with the situation of specific embodiment 1, the photoconduction staple fibre in this specific embodiment is also by center section 13a with high reflectance and the epidermis part 12a with the reflection coefficient that is lower than center section 13a.Present embodiment and specific embodiment 1 difference are in described photoconduction staple fibre the vertical formation stringiness light absorption part 14 along this photoconduction staple fibre.Each described light absorption part 14 is the cellulose acetate fibres that comprise black dyes.In the specific embodiment shown in Figure 10 kind, in described epidermis part 12a, form described light absorption part 14, but can also in center section 13, form described light absorption part.Yet, because when forming described light absorption part 14 in center section 13a, the optical conductor loss of the light in the photoconduction staple fibre can increase, and forms described light absorption part 14 among the epidermis part 12a so be preferably in.Use the screen of this photoconduction staple fibre shown in this specific embodiment can when keeping directivity, eliminate the influence of exterior light, even and in bright room, also can provide distinct image.
[embodiment 5]
Figure 11 shows the structure of the screen of present embodiment.As shown in FIG., in base material 17, be formed with through hole 15, on the side of each through hole 15, be formed with light absorbing zone 16.Described base material can be made of transparent material or light absorbing material.When described base material 17 is made of transparent material, identical with the situation of the embodiment shown in Fig. 2, the light beam that the overwhelming majority penetrates described through hole 15 can penetrate described base material 17, but, absorbed by light absorbing zone 16 with light beam greater than the incident angle incident of the incident angle of described light beam, therefore, it can not penetrate described base material 17.Therefore, above-mentioned screen will be as the directivity rear screen, and this directivity rear screen transmission comes from the light of projector, and absorb the extraneous light except the light that comes from described projector, in addition, even in bright room, the image that described screen also can clear display.
In addition, identical with the situation of the embodiment shown in Fig. 4 when described base material 17 is made of the light absorbing material that is mixed with black pigment or dyestuff, all light beams except the light beam that penetrates described through hole 15 all are absorbed.Therefore, screen with this structure is as the directivity rear screen, this directivity rear screen transmission comes from the light of projector, and absorb the extraneous light except the light that comes from described projector, in addition, even in bright room, the image that described screen also can clear display.
When comparing described base material 17 with the diameter of through hole 15 when enough thick, described through hole 15 must not penetrate described base material 17, and it can be the recessed structures that forms on the described base material.
Figure 12 shows a structure, wherein at the back side of described base material 17 reflection layer 18 is set.Equally under these circumstances, described base material 17 can be by a kind of formation the among transparent material and the light absorbing material.When described base material is made of transparent material, identical with the situation of the structure shown in Fig. 4, the overwhelming majority that comes from the light beam of the penetrable described through hole 15 in the light of projector will penetrate described base material 17, the wherein said light that comes from projector never forms that side projection of reflection layer 18, but absorbed by light absorbing zone 16 with light beam, so it can not penetrate described base material 17 greater than the incident angle incident of the incident angle of described light beam.Therefore, described screen is as the directivity forth screen, and this directivity forth screen transmission comes from the light of projector, and absorbs the exterior light except the light that comes from described projector, even in bright room, described screen also can demonstrate distinct image.In addition, identical with the situation of the structure shown in Fig. 5 when described base material 17 is made of the light absorbing material that is mixed with black pigment or dyestuff, all light beams except the light beam that penetrates described through hole 15 all are absorbed.That is to say that described screen is as the directivity forth screen, this directivity forth screen transmission comes from the light of projector, and absorb the extraneous light except the light that comes from described projector, in addition, even in bright room, the image that described screen also can clear display.
When comparing described base material 17 with the diameter of described through hole 15 when enough thick, described through hole 15 must not penetrate described base material 17, and it can be the recessed structures that forms on the described base material.Under these circumstances, even only on the bottom surface of each recessed structures, form described reflection layer 18, also can obtain same function.
[embodiment 6]
Figure 14 shows the skeleton view of structure of the screen of present embodiment.In the present embodiment, will adopt the fabric that obtains by braiding warp thread 8 and weft yarn 7 as base material 3.Here, on described weft yarn 7, insert fiber 6 with as above-mentioned fibrous protrusions.Constitute the warp thread 8 of described base material 3 and the fiber that weft yarn 7 includes employing black dyes or black pigment herein.Like this, described base material 3 just can have optical absorption characteristics.
In addition, use the fiber or the vitreous fibre that comprise white pigment can improve the luminous reflectivity of the side of described fiber 6 as fiber 6.In addition, use for example so-called silver-colored line can improve the reflection coefficient of the side of described fiber 6, wherein, described silver-colored line is to form with the surface that the light reflective metal layer covers described fiber 6.
The material that constitutes described fiber 6 can adopt natural fiber, undyed regenerated fiber for example polyamide, acrylic acid (class) resin or rayon; Though unclear illustrating in Figure 14,, by connecting the intensity that can increase described screen as the described base material 3 of fabric on the black thin film that for example has bonding agent or tackifier at a flat board.
[embodiment 7]
Figure 15 shows the sectional view of structure of the screen of present embodiment.In Figure 15, in base material 3, embed fiber 42 with predetermined angle.Because identical among the basic role of described base material 3 and fiber 42 and the embodiment 1 is so just no longer illustrated the basic role of described base material 3 and fiber 42 herein.
The manufacture method of the screen shown in Figure 15 will be described below.Described base material 3 can adopt hot setting glue (for example epoxy resin), acrylic acid ultraviolet can cure (curable) resin or include the analog of black pigment.Being in liquid resin will solidify by heating or with UV-irradiation in heating or before with UV-irradiation.In addition, long filamentous fiber is as the starting material of described fiber 42, and these fibers are bunched.In the starting material that are in liquid planar substrates material, immerse the described starting material bundle of described fiber 42 with predetermined angle.Afterwards, can and be fixed in the described base material described fibrous bundle 42 embeddings by heating or with the back side of the described base material of UV-irradiation.Afterwards, at first, described fibrous bundle 42 is cut into predetermined length, secondly, is cut into target length by this way, this mode is: the length homogenising that makes described fiber.By such process, can produce the screen of present embodiment, it has the identical fiber of length.
[embodiment 8]
Figure 16 A and 16B show the structural drawing of the screen of present embodiment.Figure 16 A is the local amplification profile of the structure of demonstration present embodiment, and Figure 16 B is the local enlarged perspective of the fibrous protrusions of present embodiment.As shown in Figure 16 A, in the present embodiment, on base material 3, form fibrous protrusions row 43.Each fibrous protrusions 44 of fibrous protrusions row 43 has the shape of elongating on the direction perpendicular to the paper of Figure 16 A.Constitute described fibrous protrusions 44 by coupling part 45 and bossing 46 being connected into " V word " shape.As shown in Figure 16 B, described fibrous protrusions 44 has a plurality of fibrous protrusions parts 46.Can form described fibrous protrusions 44 by flat film is divided and is cut into a plurality of fibrous protrusions shapes or embeds fiber in the following manner in resin, this mode is: described resin is exposed at bossing 46.When the cutting planes film when forming fibrous protrusions, each fibrous protrusions all has flat shape, can increase the reflection of light area that comes from projector fully, and can increase the screen gain.
The surface 47 of each bossing 46 has such surface color, and this color has good reflection coefficient, for example is white or metallochrome.The back side 48 of each bossing 46 and the surface of each coupling part 45 all have can light absorbing color, for example black or grey.Like this, come from projector projection light can by the surface 47 of each bossing 46 effectively scattering and the reflection with enter spectators the eye in.On the other hand, the exterior light of coming in from the right side of each bossing 46 is absorbed by the back side 48 of the surface of each coupling part 45 or bossing, and therefore, it can not enter in spectators' the eye.The result is that the screen of present embodiment can be a screen in daytime that influenced by exterior light.
The back side of coupling part 45 and described base material 3 combine by bonding agent or tackifier (not shown).When coupling part 45 and base material 3 by can be constituted the time by the polymeric material of heat fusing, can they be fused together each other by heating.Described base material 3 can adopt the platy substrate material or the flexible film class base material of rigidity.
As mentioned above, by screen of the present invention, can project distinct image, and need not to be subjected to the influence of extraneous light.The result is, even in bright environment (for example, under lighting condition), also can watch image, (for example, under lighting condition) can in common room, carry out film and appreciate or show, even also can share the information on the giant-screen in common living environment.In addition, by using fabric, can provide a very strong and easy to handle screen of flexibility as base material.
Claims (17)
1. directional screen, it carries out wherein a kind of in reflection and the transmission to the light that comes from specific direction, and so that described light is directed to the observation side, and absorption comes from the light of the direction except that described specific direction.
2. according to the directional screen of claim 1, comprising:
A plurality of transparent parts; And
Center on the light absorber of the thickness direction setting of each transparent part, the light that wherein will come from described specific direction is directed to the observation side, and absorbs the light that comes from the direction except that described specific direction.
3. according to the directional screen of claim 2, described transparent part is set in base material wherein; And the inner surface at each transparent part is provided with described light absorber.
4. according to the directional screen of claim 3, wherein, described base material is formed by light absorbing material; And in described base material, form described transparent part.
5. according to the directional screen of claim 3, wherein: described base material is formed by transparent material; And in described base material, form described transparent part.
6. according to the directional screen of claim 3, wherein, each described transparent part comprises wherein a kind of in recessed structures and the through hole; And described light absorber is to be arranged on the inner surface perpendicular to one of them the direction in described recessed structures and the through hole.
7. according to the directional screen of claim 2, wherein, described transparent part comprises the transparent bulge-structure that is formed on the described base material; And described light absorber is arranged on the side of each raised structures.
8. according to the directional screen of claim 7, wherein each bulge-structure has the cross section of the circle of being essentially on the direction on the surface that is parallel to described base material.
9. according to the directional screen of claim 1, comprising:
Fabric by braiding warp thread and weft yarn acquisition; And
Be blended in the photoconduction staple fibre in the described fabric by this way, this mode is: the residing direction of the end face of described photoconduction staple fibre is in fact perpendicular to the surface of described fabric.
10. according to the directional screen of claim 9, wherein, described photoconduction staple fibre comprises center section and periphery, and the reflection coefficient of described periphery is higher than the reflection coefficient of described center section.
11. according to the directional screen of claim 9, wherein, described photoconduction staple fibre is coated with light absorbing zone.
12., wherein, photo-absorption region vertically is set in the inside of described photoconduction staple fibre along this photoconduction staple fibre according to the directional screen of claim 9.
13. directional screen according to claim 1, comprise: be formed on a plurality of fibrous projection on the base material, each projection all has light reflective, described a plurality of fibrous protrusions is obliquely installed on the direction of light externally by this way, this mode is: can realize a kind of in the reflection that light carried out that comes from described specific direction and the transmission, and can absorb the light that comes from the direction except that described specific direction.
14. according to the directional screen of claim 13, wherein, the surface of described base material has optical absorption characteristics.
15. according to the directional screen of claim 13, wherein, each fibrous protrusions all has bossing and the coupling part that is connected on the described base material;
Described a plurality of fibrous protrusions is connected with each other by their coupling part and has the fibrous protrusions string of string structure with formation; Described fibrous protrusions string comprises a plurality of strings that are arranged in such a way, and this mode is: vertically being in line each other of described each coupling part.
16. according to the directional screen of claim 15, wherein, each bulge-structure all has flat shape;
Surface in each fibrous protrusions of projection side all has light reflective; The back side of each fibrous protrusions all has optical absorption characteristics.
17. an image projection system comprises:
Directional screen, it carries out wherein a kind of in reflection and the transmission to the light that comes from specific direction, and so that described light is directed to the observation side, and absorption comes from the light of the direction except that described specific direction;
The optical image projection instrument, it is used for optical image projection to described directional screen.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005161145 | 2005-06-01 | ||
| JP2005-161145 | 2005-06-01 | ||
| JP2005161145A JP2006337639A (en) | 2005-06-01 | 2005-06-01 | Directive screen and image projection system |
| JP2005168100 | 2005-06-08 | ||
| JP2005-168100 | 2005-06-08 | ||
| JP2005168100A JP5301759B2 (en) | 2005-06-08 | 2005-06-08 | Screen and image projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1873526A true CN1873526A (en) | 2006-12-06 |
| CN1873526B CN1873526B (en) | 2010-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100923534A Expired - Fee Related CN1873526B (en) | 2005-06-01 | 2006-06-01 | Directional screen and image projection system |
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| Country | Link |
|---|---|
| JP (1) | JP2006337639A (en) |
| CN (1) | CN1873526B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103621071A (en) * | 2011-06-13 | 2014-03-05 | 杜比实验室特许公司 | High-directivity screens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4911767B2 (en) * | 2006-07-31 | 2012-04-04 | 東洋鋼鈑株式会社 | Hood cover for traffic light |
-
2005
- 2005-06-01 JP JP2005161145A patent/JP2006337639A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103621071A (en) * | 2011-06-13 | 2014-03-05 | 杜比实验室特许公司 | High-directivity screens |
| US9335614B2 (en) | 2011-06-13 | 2016-05-10 | Dolby Laboratories Licensing Corporation | Projection systems and methods using widely-spaced projectors |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1873526B (en) | 2010-10-27 |
| JP2006337639A (en) | 2006-12-14 |
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Effective date of registration: 20070209 Address after: Chiba County, Japan Applicant after: Yamauchi Naoshi Address before: Chiba, Chiba, Japan Applicant before: Seiko Instruments Inc. |
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