CN107430326A - Reflection type screen, image display system - Google Patents
Reflection type screen, image display system Download PDFInfo
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- CN107430326A CN107430326A CN201680018959.5A CN201680018959A CN107430326A CN 107430326 A CN107430326 A CN 107430326A CN 201680018959 A CN201680018959 A CN 201680018959A CN 107430326 A CN107430326 A CN 107430326A
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- Prior art keywords
- reflection type
- type screen
- lens
- image
- layer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/602—Lenticular screens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
This application discloses a kind of reflection type screen for being capable of the higher image of show uniformity and the image display system for possessing the reflection type screen.For reflection type screen (10) when the radius of the point C away from the Fresnel center as lens face (112) is set into r (mm), the lens face (112) and the face angulation α (°) parallel with screen cover of the single-element lens (111) of annular Fresnel Lenses shape are set to 3.20779089934252 × 10‑12×r4+1.70966116372389×10‑8×r3- 3.57230633930145 × 10‑5×r2In the range of+0.0422019282210293 × r-0.544381670028088 ± 5 (°).
Description
Technical field
The reflection type screen of image, image display system are shown the present invention relates to projected image light is reflected.
Background technology
In the past, the reflection type screen with various compositions is have developed, is used in image display system.In recent years, relatively
In reflection type screen from the short focus type especially closely realized with bigger crevice projection angle projection image light big picture and shown
Image projection apparatus (projector) etc. be widely used.
The image projection apparatus of short focus type is relative to reflection type screen, from above or below with bigger than conventional image source
Incident angle projection image light, the distance in the depth direction between image projection apparatus and reflection type screen, institute can be shortened
Can aid in space saving for the image display system for having used reflection type screen etc..
In order to show the image light projected by the image projection apparatus of such short focus type well, develop it is various
With the linear Fresnel lens shape that multiple single-element lens are arranged and formed and/or the lens of annular Fresnel Lenses shape
Reflection type screen in reflecting layer etc. is formd on the surface of layer (for example, referring to patent document 1,2).
Prior art literature
Patent document
Patent document 1：Japanese patent application discloses flat 8-29875 publications
Patent document 2：Japanese patent application discloses 2008-76522 publications.
The content of the invention
The invention problem to be solved
In reflection type screen as described above, pass through the reflection at the reflecting layer on the surface for being formed at lens jacket, image
Light is to observer's lateral reflection.Therefore, the design of the lens face of lens jacket and screen cover angulation (lens angle) in order to
It is important to show good image.The lens angle and image projection apparatus and/or position, the refractive index of lens jacket of observer
Designed Deng corresponding.
Image projection apparatus is according to the difference of species etc., to the most suitable position of reflection type screen and/or projection distance
Etc. difference.Especially, the projection distance of the image projection apparatus of short focus type is shorter, even so the difference of very little is also shown in image
Upper generation large effect.Therefore, in reflection type screen as described above, lens angle needed and each image projection apparatus in the past
Accordingly design.If it is assumed that image projection apparatus is only changed in image display system, with following problems：Produce
The peripheral part of picture is dimmed to wait brightness disproportionation and produces uniformity (uniformity of the overall brightness of picture and/or color rendering)
Decline, sometimes image quality decline.
In above-mentioned patent document 1,2, the correspondence on different multiple image projection apparatus as described above
Height and/or uniformity raising, it is basic without open.
The problem of the present invention is to provide a kind of image projection apparatus that can also correspond to different multiple short focus types, can
The reflection type screen of the higher good image of show uniformity and the image display system for possessing the reflection type screen.
Means for solving the problems
The present invention solves the problem by following solution.In order that understand easy, imparting and the reality of the present invention
Apply the corresponding reference of mode and illustrate, but be not limited to this.
First invention is a kind of reflection type screen (10), and it makes, and the image light from image source projection reflects and be shown as can
Observation, above-mentioned reflection type screen are characterised by possessing：Lens jacket (11), its overleaf side with multiple with lens face
(112) and the convex single-element lens (111) of non-lens face (113) and surface side of supporting or opposing is arranged as the annular Fresnel that concentric circles form
Lens shape；And reflecting layer (12), it is formed at a part at least the above lens face and reflected light, wherein above-mentioned concentric circles
Center (C) from the normal direction of screen cover, outside the region of the viewing area of the reflection type screen, said lens face
The face angulation α (°) parallel with screen cover, the radius at the center away from above-mentioned concentric circles of the lens face is being set to r
(mm) when, the whole region in above-mentioned viewing area, -3.20779089934252 × 10 are met-12×r4+
1.70966116372389×10-8×r3- 3.57230633930145 × 10-5×r2+ 0.0422019282210293 × r-
0.544381670028088-5 ＜ α ＜ -3.20779089934252 × 10-12×r4+1.70966116372389×10-8×
r3- 3.57230633930145 × 10-5×r2+ 0.0422019282210293 × r-0.544381670028088+5 formula
Son.
Second invention is according to the described reflection type screen (10) of the first invention, it is characterised in that：Said units lens
(111) refractive index is less than more than 1.45 1.65.
3rd invention is according to the described reflection type screen (10) of the first or second invention, it is characterised in that：Above-mentioned reflection
The substantially rectangular shape of picture of type screen, is diagonally 100 inches, length-width ratio is 16：9.
4th invention is according to the described reflection type screen (10) of any one of first to the 3rd invention, it is characterised in that：
When from the normal direction of screen cover, the center (C) of above-mentioned concentric circles and the geometric center (A) of above-mentioned viewing area
Distance (S1) is more than 675mm below 695mm.
5th invention is according to the described reflection type screen (10) of first to fourth any one invention, it is characterised in that：
The arrangement pitch of said units lens (111) is less than more than 50 μm 1000 μm.
6th invention is a kind of image display system (1), including：The reflection type screen of any one invention of first to the 5th
(10) image source (LS) of image light and to above-mentioned reflection type screen is projected.
7th invention is according to the described image display system (1) of the 6th invention, it is characterised in that：From above-mentioned reflection-type screen
The normal direction observation of the screen cover of curtain (10), above-mentioned image source (LS) are located at the region of the viewing area of above-mentioned reflection type screen
Outside, positioned at the center (C) by above-mentioned concentric circles and the geometric center (A) of above-mentioned viewing area and saturating with said units
On the parallel straight line of the orientation of mirror (111), and relative to above-mentioned viewing area positioned at the center phase with above-mentioned concentric circles
Same phase homonymy.
Invention effect
According to the present invention, play can provide a kind of image projection apparatus that can also correspond to different multiple short focus types,
It is capable of the reflection type screen of the higher good image of show uniformity and possesses the image display system of the reflection type screen
Effect.
Brief description of the drawings
Fig. 1 is the figure for the image display system 1 for showing embodiment.
Fig. 2 is the figure that the layer for the reflection type screen 10 for showing embodiment is formed.
Fig. 3 is the figure illustrated to the lens jacket 11 of embodiment.
Say the position that Fig. 4 is reflection type screen 10 in the image display system 1 to embodiment, image source LS etc.
Bright figure.
Fig. 5 is the chart of the angle [alpha] for the reflection type screen 10 for showing embodiment.
Fig. 6 is the figure illustrated to the evaluation method of the brightness disproportionation of the reflection type screen of embodiment.
Embodiment
Hereinafter, referring to the drawings etc., embodiments of the present invention are illustrated.Including Fig. 1, each figure as shown below is to show
Figure shown in meaning property, size, the shape of each several part are in order that understanding easily and suitably being exaggerated.
In this manual, using words such as plate, sheet materials, but these are as in general application method, according to thickness from thickness to
Thin order, used with the order of plate, sheet material, film, also used in this manual according to the classification.But such make
There is no technical meaning with method, so these words can be replaced suitably.
In this manual, the numerical value and material name etc. such as size of each part of record are one as embodiment
Example, is not limited to this, suitably selects and use.
In this manual, for shape and/or geometric condition are specified term, it is for example parallel and/or
It is orthogonal to wait term, in the case of no especially negative, except the tight meaning, also include playing same optical work(
, can be there is the state of the error for the degree that can be considered parallel and/or orthogonal.
(embodiment)
Fig. 1 is the figure for the image display system 1 for showing present embodiment.Fig. 1 (a) is the stereogram of image display system 1,
Fig. 1 (b) shows the appearance of the image display system 1 from side.
Image display system 1 has reflection type screen 10, image source LS etc..In the present embodiment, reflection type screen 10
The image light L from image source LS projections is reflected, image is shown on its picture.Before the image display system 1 can be used as example
Throw television system etc. and use.
Image source LS is the image projection apparatus for projecting image light L to reflection type screen, is the general throwing of short focus type
Shadow machine etc..
Image source LS in a state of use, in the reflection type screen 10 from positive direction (normal direction of screen cover)
Picture (viewing area) in the case of, it is centrally located on the picture left and right directions of reflection type screen 10, and than reflection-type screen
The picture of curtain 10 leans on vertical direction lower side.
Image source LS can be on the direction orthogonal with picture, from the distance on the surface away from reflection type screen 10 than conventional
General projector significantly near position projection image light L.Therefore, image source LS is compared with conventional general projector, to reflection
The projection distance of type screen 10 is shorter, and the incident angle relative with reflection type screen 10 of image light is larger.
So-called screen cover, plane when being denoted as 10 whole observation of reflection type screen, as reflection type screen 10
The face in direction, it is set to parallel with the picture of reflection type screen 10.
The image light L that image source LS is projected to observer's O lateral reflections, is shown image by reflection type screen 10.Reflection-type screen
The picture (viewing area) of curtain 10 is that long side direction turns into picture left and right directions from observer O sides in a state of use
Substantially rectangular shape.
Reflection type screen has the larger picture that its picture dimension is diagonal 80~100 inches of degree.Present embodiment
The size of picture (viewing area) of reflection type screen 10 be diagonal 100 inches (2214 × 1245mm), the length-width ratio of picture
For 16：9.
In the following description, so-called picture above-below direction, picture left and right directions, thickness direction, especially do not negating
In the case of, the picture above-below direction (vertical direction), the picture left and right directions that are set under the use state of the reflection type screen 10
(horizontal direction), thickness direction (depth direction).In addition, on the right side of so-called picture, on the left of picture, in the situation for especially not negating
Under, the right side, the left side that are set on the picture left and right directions from the observer O of the positive direction positioned at the reflection type screen 10
Side.
Typically, reflection type screen is relatively thin layered product of layer of resin-made etc., and it is individually most without maintenance flatness
Sufficiently rigidity.Therefore, the reflection type screen 10 of present embodiment is by being set to what is be not shown in its rear side is via figure
Bonding layer engagement (or part fixed) maintains the flatness of its picture in the form of the one of supporting plate 50.
Supporting plate 50 is the higher flat part of rigidity, can use the resin-mades such as acrylic resin and PC resin,
The part of the tabular such as the metal systems such as aluminium, wooden.Supporting plate 50 does not preferably have translucency from viewpoints such as the raisings of aesthetic appearance, but
There can be translucency.In the image display system 1 of present embodiment, supporting plate 50 is installed on by defined fixed component
Wall.Fixed component can suitably be selected and used.
This is not limited to, reflection type screen 10 can also support its four side by frame part for being not shown in figure etc.
Deng maintaining the form of its flatness.
Fig. 2 is the figure that the layer for the reflection type screen 10 for showing present embodiment is formed.In fig. 2, amplification shows to pass through work
Above and below point A (reference picture 1 (a), (b)) and picture for the picture central (the geometric center of picture) of reflection type screen 10
The part in the section in direction parallel and orthogonal with screen cover (parallel with thickness direction).In fig. 2, in order that understanding easily,
The grade of supporting plate 50 is suitably omitted and shown sometimes.
Reflection type screen 10 as shown in Fig. 2 include superficial layer 14, base material in order from image source LS sides (observer side)
Layer 13, lens jacket 11, reflecting layer 12 etc..
Substrate layer 13 is the part of the sheet with translucency.Substrate layer 13 is formed with superficial layer in its observer side
14, overleaf side (the inside side) be formed with lens jacket 11.The substrate layer 13 is as the base material (base of lens jacket 11 is formed
Plinth) layer.
Substrate layer 13 has light diffusion layer 131 and dyed layer 132, and they are laminated and is integrated.In the present embodiment, base
Material layer 13 is as shown in Fig. 2 show that light diffusion layer 131 is located at rear side, dyed layer 132 is located at observer side (image source)
Example, but this is not limited to, the side that light diffusion layer 131 is located at observer side, dyed layer 132 is located at rear side can also be set to
Formula.
Light diffusion layer 131 is that the resin with translucency is set into mother metal and containing the layer for the diffusion materials for spreading light, tool
Play the role of to spread light.The light diffusion layer 131 has the function of the raising for the inner evenness widened visual angle or seek brightness.
As the resin of the mother metal as light diffusion layer 131, can enumerate PET (polyethylene terephthalate) resins and
PC (makrolon) resin, MS (styrene-methyl methacrylate) resin, MBS (MMB methyl methacrylate butadienes
Styrene) resin, acrylic resin, TAC (Triafol T) resin, PEN (PEN) resin etc..
In addition, as the diffusion materials for being contained in light diffusion layer 131, acrylic resin, epoxy resin, silicone can be used
Particle and/or inorganic particulate of the resin-mades such as system etc., can also be applied in combination inorganic system's diffusion materials and organic system diffusion materials.Diffusion
Material is generally spherical in shape, preferably using the diffusion materials that its average grain diameter is about 1~50 μm, is more suitable for the average grain of diffusion materials used
The scope in footpath is about 5~30 μm.
Light diffusion layer 131 is also relevant with the picture dimension of reflection type screen 10 and/or desired optical property, from suppression
Image is fuzzy and obtains the viewpoint of the inner evenness of sufficient brightness, and it is about 100~2000 μm to be preferably set to its thickness, its
Haze value is 85~99% scope.
Dyed layer 132 is to colour the implementations such as material coloring by the dyestuffs such as grey and/or black and/or pigment etc. to be changed into advising
The layer of fixed light transmittance.The dyed layer 132, which has to absorb, incides the unwanted exterior light such as the illumination light of reflection type screen 10
And/or the function of scattering light or make the black luminance of shown image reduce and improve the contrast of image.
As the resin of the mother metal as dyed layer 132, PET resin and/or PC resin, MS resins, MBS trees can be enumerated
Fat, acrylic resin, TAC resins, PEN resins etc..In addition, as coloring material, it is dark that grey colour system and/or black system etc. can be enumerated
Dyestuff and/or pigment of colour system etc. and/or the metal salt such as carbon black, graphite, black iron oxide etc..
Dyed layer 132 is also relevant with the picture dimension of reflection type screen 10 and/or desired optical property, but from abundant
Absorb exterior light and reduce the black luminance of image and the viewpoint of the bright image of display, its thickness is preferably set to about 30~
3000 μm, its light transmittance is set to about 30~80%.
Substrate layer 13 can be formed as these layer stackups by the way that light diffusion layer 131 is extruded together with dyed layer 132
One.
Fig. 3 is the figure illustrated to the lens jacket 11 of present embodiment.Fig. 3 (a) shows to see from rear side positive direction
The appearance of lens jacket 11 is examined, in order that understanding easy, the grade omission of reflecting layer 12 diagram.Fig. 3 (b) so amplify foregoing figure is shown
The part in the section shown in 2.
Lens jacket 11 is the layer of the resin-made with translucency for the rear side for being arranged at substrate layer 13.Lens jacket 11 exists
On the face of its rear side (with 13 opposite side of substrate layer), as shown in Fig. 3 (a), have with outside the picture of reflection type screen 10
Point C centered on and concentric circles are arranged with the annular Fresnel Lenses shapes of multiple single-element lens 111.That is, lens jacket 11
The annular Fresnel that annular Fresnel Lenses is shaped as point C being set to center (Fresnel center), so-called offset configuration is saturating
Mirror shape.Therefore, as shown in Fig. 3 (a), from the normal direction rear side from screen cover during lens jacket 11, can be observed just
The single-element lens 111 of round a part of shape (arc-shaped) is arranged multiple.
Single-element lens 111 is such as shown in Fig. 2 and/or Fig. 3 (b), and (the thickness of reflection type screen 10 of the direction orthogonal with screen cover
Spend direction) cross sectional shape on parallel and parallel with the orientation of single-element lens 111 section is generally triangular shaped.
The single-element lens 111 surface side of supporting or opposing is convex, possesses lens face 112 and clips non-relative with lens face 112 of summit t
Minute surface 113.Under the use state of reflection type screen 10, in single-element lens 111, lens face 112 clips summit t and is located at than non-
Lens face 113 is by the position on the upside of vertical direction.
In single-element lens 111, as shown in Fig. 3 (b), lens face 112 and the face angulation (lens parallel with screen cover
Angle) it is α, non-lens face 113 and the face angulation parallel with screen cover are β.Now, angle [alpha], β meet β ＞ α relation.
In addition, the arrangement pitch of single-element lens 111 is P, the lens height of single-element lens 111 is (from the thickness direction of screen
On summit t to the point v as the lowest point between single-element lens 111 size) be h.
In order that understanding easily, in Fig. 2 etc., show that arrangement pitch P, angle [alpha], the β of single-element lens 111 are saturating in unit
It is certain example in the orientation of mirror 111.But the single-element lens 111 of present embodiment actually arranges pitch P as one
It is fixed, but angle [alpha] gradually increases in the orientation of single-element lens 111 with being left from the point C as Fresnel center.This
The arrangement pitch P of the single-element lens 111 of embodiment can be set as 50~1000 μm of scope.
The angle [alpha] of single-element lens 111 changes as described above, so lens height h is with the arrangement side of single-element lens 111
Left upwards from point C and become big.The lens height h of present embodiment is 4.4 μm of (r=62.4mm：Screen-picture lower end center)
~48.3 μm of (r=1713.1mm：The corner at the left and right end of screen-picture upper end).
Arrangement pitch P can also be set to the form gradually changed along the orientation of single-element lens 111, can be with projection
The size of the image source LS of image light pixel (pixel) and/or image source LS crevice projection angle (image light to reflection-type screen
The incident angle of the screen cover of curtain 10), the picture dimension of reflection type screen 10, the refractive index etc. of each layer is corresponding and suitably changes.
Lens jacket 11 is formed by ultraviolet curing resins such as urethane acrylate and/or epoxy acrylates.Example
Such as, lens jacket 11 can be formed by ultraviolet forming process etc., by face (in the present embodiment, the light of a side of substrate layer 13
The face of the side of diffusion layer 131) it is pressed into the shaping for imparting the annular Fresnel Lenses shape filled with ultraviolet curing resin
Mould, irradiate ultraviolet and it is stripped after solidifying from mould.
Single-element lens 111 (lens jacket 11) of present embodiment its refractive index is 1.45~1.65.
The forming method of lens jacket 11 can be selected suitably, be not limited to this.In addition, lens jacket 11 can also pass through electricity
Other ionization radial line gel-type resins such as beamlet gel-type resin are formed.
, can also be corresponding to the Fresnel Lenses shape of lens jacket 11 and then lens jacket 11 can use thermoplastic resin
And pass through the formation such as compressing method.In the case of such lens jacket 11, it can also be set to via being not shown in figure
The form in its image source laminated substrate layer 13 (light diffusion layer 131) etc. such as bonding layer.In addition, extrusion molding can utilized
In the case of method, it can also be shaped in the state of lens jacket 11 is integrated with the stacking of substrate layer 13.
Reflecting layer 12 is the layer for having the function that reflected light.The reflecting layer 12 has the sufficient thickness for reflected light,
It is formed on a part at least lens face 112 of single-element lens 111.
The reflecting layer 12 of present embodiment, as shown in Fig. 2 and/or Fig. 3 (b), it is formed on lens face 112 and non-lens
Face 113.Specifically, reflecting layer 12 is formed, and covers the rear side of lens jacket 11, covers the convex single-element lens in surface side of supporting or opposing
Border between 111, the point v for becoming the lowest point.Thus, reflecting layer 12 can make the concavo-convex substantially flat of the rear side of lens jacket 11
It is smooth, it can more stably paste supporting plate 50 via the bonding layer being not shown in figure.
Reflecting layer 12 relative to lens face 112 by spraying the metallic film 12a containing the higher flakey of light reflective
Coating (resin) and be formed on lens face 112.
The vertical face of the thickness direction of metallic film 12a with flakey is configured to relative to lens face by reflecting layer 12
112 is almost parallel, and the image light L that can make to incide lens face 112 is correctly to observer's lateral reflection.
Herein, it is so-called almost parallel, not only include the face vertical with metallic film 12a thickness direction relative to lens
The situation that face 112 is substantially parallel, also include situation of the inclination to lens face 112 for -10 °~+10 ° of scope.In addition, institute
The metallic film 12a of flakey is called, refers to that the shape (outer shape) from its thickness direction is flakey, the so-called squama
Sheet, the not only shape including squamous, also including ellipticity and/or round shape, polygon, will be indefinite obtained from film crushing
Shape of shape etc..
The metallic film 12a of flakey from viewpoints such as metallic luster, disguise, adaptation, orientations, using adaptation,
The especially good resin coating type of orientation.
In order to more effectively make the reflection of the image light of incidence, preferably normal reflection rate Rt is 50% ＜ Rt ＜ in reflecting layer 12
70%, scattered reflection rate Rd are 10% ＜ Rd ＜ 50%.
The metallic film 12a of present embodiment is the aluminium for being formed as flakey.Metallic film 12a thickness is formed
For 15~150nm scope, more preferably 20~80nm scope.
In addition, on preferably orthogonal with thickness direction metallic film 12a longitudinal direction and horizontal direction size (with
Under, referred to as longitudinal size, lateral dimension) average value be formed as the size equal with the lens height h of single-element lens 111, i.e.
4.4~48.3 μm.Herein, it is so-called equal with lens height h, longitudinal size and transverse direction not only including metallic film 12a
The size situation equal with lens height h, in addition to the approximate situations of lens height h (for example, relative to lens height h
Size range for -30%~+30%).
If metallic film 12a is configured to almost parallel with non-lens face 113, non-lens face is incided in exterior light
In the case of 113, have a case that the exterior light is reflected by non-lens face 113 and reaches observer side, turn into the contrast of image
What degree declined will be because.Therefore, by by metallic film 12a longitudinal size and lateral dimension is set to as described above and lens
Height h is equal, is configured to coatings in the case of the rear side of lens jacket 11, can be suppressed into metallic film 12a
It is almost parallel relative to non-lens face 113.Thus, even if incidence of external light can also pass through to non-lens face 113, reflecting layer 12
Metallic film 12a end spreads exterior light, and the suppression that can do the best makes external light reflection to observer side.
Reflecting layer 12, from the viewpoint and the back side of holding reflection type screen 10 well for ensuring its reflective character well
The viewpoint of the outward appearance of side, the central portion of the lens face 112 in the orientation of single-element lens 111 are vertical with lens face 112
The thickness (thickness) in direction is preferably formed into 8~15 μm of scope.
It is assumed that if the above-mentioned thickness in reflecting layer 12 is less than 8 μm, the reflectivity with reflecting layer 12 declines, become not
The danger of energy fully reflected image light.In addition, if the above-mentioned thickness in reflecting layer 12 is less than 8 μm, with following danger：
The reflecting layer 12 that the rear side of reflection type screen 10 is exposed, there are the part of film and the part without film, produced in outward appearance
Uneven and/or scratch etc., damage the outward appearance of the rear side of reflection type screen 10.
In addition, if 15 μm of the above-mentioned thickness ratio in reflecting layer 12 were big, one of the metallic film 12a included by reflecting layer 12
Part is not to be aligned to almost parallel with lens face 112, but is aligned to be partly relative to lens face 112 and substantially hangs down
Directly, the outward appearance having in the rear side in reflecting layer 12 produces the danger of the outward appearance of rear side that is uneven, damaging reflection type screen 10.
Therefore, the thickness in reflecting layer 12 is preferably set to above range.
Superficial layer 14 is the layer for the image source (observer side) for being arranged at substrate layer 13.The superficial layer of present embodiment
14 form the outmost surface of the image source of reflection type screen 10.
The superficial layer 14 of present embodiment has hard conating function and anti-dazzle function, in the image source of substrate layer 13
Surface, to be coated with the ultraviolet curing resin (example with hard conating function in a manner of about 10~100 μm of thickness for being changed into film
Such as, urethane acrylate) etc. ionization radial line gel-type resin, small concaveconvex shape (shape of cushion) is transferred to the tree
Adipose membrane surface etc. and make its solidification, to surface assign minute asperities shape and formed.
Superficial layer 14 is not limited to above-mentioned example, can suitably select to set one or more reflections prevent function and/
Or anti-dazzle function, hard conating function, ultraviolet radiation absorption function, anti-pollution function and/or powered prevent the necessary function such as function.This
Outside, it can also be used as superficial layer 14 that touch screen layer etc. is set.
In addition, superficial layer 14 can also between superficial layer 14 and substrate layer 13 and then as other layer and being provided with has
Reflection prevents function and/or ultraviolet radiation absorption function, the anti-pollution function and/or powered layer for preventing function etc..
And then superficial layer 14 can be set to layer outside substrate layer 13 and bonding material by being not shown in figure etc. connects
Together in the form of substrate layer 13, the face with 11 opposite side of lens jacket (image source) of substrate layer 13 can also be formed directly into.
Fig. 2 is returned to, the image light L1's and exterior light G1, G2 to the incidence of reflection type screen 10 to present embodiment
Appearance illustrates.In fig. 2, in order that understand it is easy, superficial layer 14, substrate layer 13 (dyed layer 132, light diffusion layer 131),
The refractive index of lens jacket 11 is set to equal, light diffusion relative with image light L1 and exterior light G of light diffusion layer 131 etc.
Omit and show.
As shown in Fig. 2 the most image light L1 from image source LS projections is incident from the lower section of reflection type screen 10, thoroughly
Cross superficial layer 14 and substrate layer 13 and incident to the single-element lens 111 of lens jacket 11.
Moreover, image light L1 is incident to lens face 112 and is reflected by reflecting layer 12, from reflection type screen 10 to observer
O sides are emitted.Therefore, image light L1 is effectively reflected and reaches observer O, so bright image can be shown.
Image light L1 is projected from the lower section of reflection type screen 10, and angle beta (reference picture 3 (b)) is than reflection type screen 10
Picture above-below direction each point at image light L1 incident angle it is all big, so image light L1 will not be directly incident on it is non-
Minute surface 113, non-lens face 113 do not influence image light L1 reflection.
On the other hand, unwanted exterior light G1, G2 such as illumination light is as shown in Fig. 2 mainly from the upper of reflection type screen 10
Side is incident, incident to the single-element lens 111 of lens jacket 11 through superficial layer 14 and substrate layer 13.
Moreover, the exterior light G1 of a part is incident to non-lens face 113, but at the back side for being formed on non-lens face 113
The metallic film 12a in the reflecting layer 12 of side end is spread, even if reaching observer O sides, its light quantity is also bigger than image light L1
Width is reduced.In addition, the exterior light G2 of a part reflects in lens face 112, mainly towards the lower side of reflection type screen 10, so
Observer O sides will not be directly reached, in addition, even if in case of arrival, its light quantity is also greatly decreased than image light L1.Enter
And a part of incidence of external light is colored layer 132 and absorbed to reflection type screen 10.Therefore, can in reflection type screen 10
The contrast for suppressing image caused by exterior light G1, G2 etc. declines.
Due to case above, according to the reflection type screen 10 of present embodiment, under bright room environmental, can also show
The higher bright good image of contrast.
The position that Fig. 4 is reflection type screen 10 in the image display system 1 to present embodiment, image source LS etc. is carried out
The figure of explanation.Fig. 4 (a) shows the appearance of the reflection type screen 10 from the normal direction of screen cover, and Fig. 4 (b) shows and reflected
The position in each portion on parallel and orthogonal with the screen cover section of the picture above-below direction of type screen 10.In Fig. 4, in order that reason
Solution is easy, and reflection type screen 10 and the simplification of image display system 1 are shown.
As shown in Fig. 4 (a), from the normal direction from screen cover in the case of reflection type screen 10, image source LS's
Point B that the projection mouth of image light is located at, as the reflection type screen 10 picture geometric center point A and as lens
The point C at the Fresnel center of the annular Fresnel Lenses shape of layer 11 seems positioned at the straight line upwardly extended in picture upper and lower
On T.
It is assumed herein that straight line T is located on the plane M parallel with screen cover.Moreover, will be from point A, point B, point C to flat
The intersection point of sagging vertical line and plane M is set to point A1, point B1, point C1 on face M straight line T.
By the distance between the point A on picture above-below direction and point C (that is, between the point A1 and point C1 on straight line T away from
From) be set to size S1, by the point A on picture above-below direction and point B distance (that is, between the point A1 and point B1 on straight line T away from
From) it is set to size S2.
Now, size S1 and size S2 meets S1 ＜ S2 relation.
In addition, reflection type screen 10 as shown in figure 4, by collection luminous point F light harvestings in a manner of, reflected image light L, the light harvesting
Point F is located at the point A at geometric center that passes through the picture for turning into display image and orthogonal with the screen cover of reflection type screen 10
Straight line H image source (observer side), and positioned at from the surface of the image source of reflection type screen 10 to positive direction from
The position of distance as defined in opening.Reflection type screen 10 assumes that what observer O made near collection luminous point F and its.
The collection luminous point F of the reflection type screen 10 of present embodiment is located at the image source (observer of the straight line H shown in Fig. 4
Side) and image source side surface 3m away from reflection type screen 10 position.
Single-element lens 111 projects image light by the picture dimension of reflection type screen 10, relative to reflection type screen 10
Image source LS position and/or the crevice projection angle of image light, collection luminous point F position (that is, observer O position), single-element lens
The refractive index of 111 (lens jackets 11), it is located to the single-element lens 111 from the point C at the Fresnel center as annular Fresnel
The distance of point (range points C radius r) etc., sets its lens angle α.
In the case of using the image source of short focus type, the crevice projection angle of image light (image light to reflection type screen
Incident angle) it is larger, in addition, the incident angle of the image light of position on reflection type screen significantly changes.Therefore, lead to
Cross each position (the radius r) suitable with range points C distance, its preferable lens angle α difference of reflection type screen.
Typically, reflection type screen by relative to the image source used it is most suitable in a manner of design its lens angle etc..Therefore, exist
It is all short focus type but in the case of having used different image sources, for example, can be in the display pitch and unit of the image of image source
Moire fringe is produced between lens, or can not be fully to collection luminous point F reflected lights, the peripheral part for the picture for producing reflection type screen
(particularly peripheral part on the upside of picture) is dimmed to wait brightness disproportionation etc., easily produces the decline of image quality.
In addition, image display system and reflection can be made by separately designing most suitable reflection type screen relative to each image source
The production cost increase of type screen.
Therefore, the reflection type screen 10 of present embodiment, in the annular Fresnel Lenses shape using distance as lens jacket 11
When the point C at the Fresnel center of shape radius is set to r (mm), lens face 112 and and screen positioned at the position away from point C radiuses r
Parallel face angulation (lens angle) α (°) in face meets following formula (formula 1).
-3.20779089934252×10-12×r4+1.70966116372389×10-8×r3-
3.57230633930145×10-5×r2+ 0.0422019282210293 × r-0.544381670028088-5 ＜ α ＜-
3.20779089934252×10-12×r4+1.70966116372389×10-8×r3- 3.57230633930145 × 10-5×
r2+ 0.0422019282210293 × r-0.544381670028088+5 ... (formula 1)
By the reflection type screen 10 for being set to meet the formula 1, the reflection type screen 10 of present embodiment can be widely right
Answer the image source LS of short focus type.It therefore, there is no need to the necessary lens angle α of each image source design, image can be reduced and shown
The production cost of system and reflection type screen.
, can show uniformity be higher, contrast is higher in addition, by the reflection type screen 10 for being set to meet the formula 1
Bright good image, it can be set to correspond to the reflection type screen 10 and shadow of the image source of different multiple short focus types
As display system 1.
Herein, the reflection type screen 10 of the embodiment of present embodiment is made, shadow is projected from different multiple image sources
The presence or absence of picture, evaluation brightness disproportionation etc..
Fig. 5 is the chart for showing the angle [alpha] on the reflection type screen 10 of embodiment.In Figure 5, the longitudinal axis represents lens angle α
(°), transverse axis represent range points C radius r (mm).
In Figure 5, the curve shown in single dotted broken line represents formula 3 as shown below, and dotted line represents formula 4 as shown below.Formula 3
Represent the upper limit of foregoing formula 1, the lower limit of the expression 1 of formula 4.
α=- 3.20779089934252 × 10-12×r4+1.70966116372389×10-8×r3-
3.57230633930145×10-5×r2+ 0.0422019282210293 × r-0.544381670028088+5 ... (formula 3)
α=- 3.20779089934252 × 10-12×r4+1.70966116372389×10-8×r3-
3.57230633930145×10-5×r2+ 0.0422019282210293 × r-0.544381670028088-5 ... (formulas
4)
The reflection type screen 10 of embodiment, picture dimension are diagonal 100 inches (2214 × 1245mm), the length-width ratio of picture
For 16：9.Size S1 as the distance between the point A on the picture above-below direction of the reflection type screen 10 of the embodiment and point C
=685mm.In addition, the lens angle α (°) of the reflection type screen 10 of the embodiment can be approximate by following formula 2.
α=- 3.20779089934252 × 10-12×r4+1.70966116372389×10-8×r3-
3.57230633930145×10-5×r2+ 0.0422019282210293 × r-0.544381670028088 ... (formula 2)
The formula 2 is represented by solid line in Figure 5.The reflection type screen 10 of embodiment is before the whole region of its picture meets
The formula 1 stated.
In addition, in the reflection type screen 10 of the embodiment, the refractive index of single-element lens 111 is 1.55, single-element lens 111
P=100 μm of arrangement pitch.
Each layer beyond the lens jacket 11 of the reflection type screen of embodiment is as described below.
Superficial layer 14 is ultraviolet curing resin system, and thickness is 30 μm, is had on its image source side surface small
Concaveconvex shape.
The thickness of the dyed layer 132 of substrate layer 13 is 1500 μm, to contain acrylic acid tree of the black dyes as coloring material
Fat system.The light transmittance of the dyed layer 132 is 59%.
The thickness of the light diffusion layer 131 of substrate layer 13 is 150 μm, for the propylene of the diffusion materials containing about 8 μm of average grain diameter
Acid resin system.The haze value of the light diffusion layer 131 is 85%.
Reflecting layer 12 is the polyurethane series heat reactive resin system of the aluminium containing flakey, is formed on lens face and non-
Minute surface.The thickness in reflecting layer 12 is about 10~20 μm.The normal reflection rate Rt=57% in the reflecting layer 12.
Fig. 6 is the figure illustrated to the evaluation method of the brightness disproportionation of the reflection type screen 10 of embodiment.In figure 6,
The reflection type screen 10 of embodiment and observer O appearance when showing to evaluate from the side of reflection type screen 10.
Image light is projected under dark room conditions to the reflection type screen 10 of embodiment from the image source LS of 4 kinds of short focus types respectively
(white light).
Observer O from the point A at the geometric center of the picture by the reflection type screen 10 as embodiment and with screen
D1=3m point is left on the vertical straight line H in curtain face and from the surface of reflection type screen 10 to image source (observer side)
(collection luminous point F), observes the picture of reflection type screen 10, evaluates the image.
5 image sources used are all the projectors of commercially available short focus type, and each image source is described in respective catalogue etc.,
It is configured in the position for projecting diagonal about 100 inches image relative to reflection type screen.With the reflection-type screen of embodiment
The 10 relative positions of each image source of curtain etc. are as described below.Size S3 is from the reflection type screen 10 in the normal direction of screen cover
Surface to the distance of the reflection type screen side end of the profile of each image source, size S4 is from each shadow on picture above-below direction
Distance of the lower end of the profile of image source to the lower end of the picture of the reflection type screen 10 of embodiment.
In the image source of evaluation example 1, size S3=143mm, size S4=370mm.
In the image source of evaluation example 2, size S3=110mm, size S4=370mm.
In the image source of evaluation example 3, size S3=314mm, size S4=263mm.
In the image source of evaluation example 4, size S3=420mm, size S4=386mm.
In the image source of evaluation example 5, size S3=126mm, size S4=311mm.
Each image source is configured in position as described above relative to reflection type screen 10, relative to reflection type screen 10
Picture (viewing area), to be shown in the image of the picture as diagonal 97~100 inches of (length-width ratios 16：9) mode projects shadow
As light, its brightness disproportionation is evaluated.
Which the reflection type screen 10 of embodiment evaluate the image source of example for, all without the periphery for observing picture upper end side
Portion is dimmed to wait brightness disproportionation, and the inner evenness of brightness is abundant, has good uniformity.Also, the brightness of picture is also abundant.
Therefore, according to present embodiment, it can be set to that the image source of different short focus types can be corresponded to, have good uniformity
Reflection type screen 10 and image display system 1.
(mode of texturing)
Be not limited to each embodiment described above, various modifications and/or change can be carried out, these deformation and/
Or change is also included in the scope of the present invention.
(1) in embodiments, show reflecting layer 12 be formed capping unit lens 111 lens face 112 and
The example of non-lens face 113, but it is not limited to this.For example, reflecting layer 12, which can also be only arranged at, contributes to lens face 112
The part of the reflection of image light.In this case, in a part for lens face 112 and non-lens face 113, reflection is not formed
Layer 12, so needing to set the hidden hidden layer of the rear side in reflecting layer 22 (protective layer).
(2) the metallic film 12a in reflecting layer 12 is not limited to aluminium, can also use flakey silver and/or nickel etc. its
His metal.
(3) reflection type screen 10 is glass system and/or resin-made, can also be set to have to maintain the flatness of picture
The form of the higher transparent substrate layer of standby rigidity.
(4) in embodiments, show lens face 112 and non-lens face 113 such as in Fig. 2 by linearly showing
It is like that plane example to go out, but is not limited to this, and a part for lens face 112 and/or non-lens face 113 can also shape
As curved.
In addition, the lens face 112 and non-lens face 113 of single-element lens 111 can also be set to the face of a for example, at least side
The form being made up of multiple faces.
And then single-element lens 111 can also be set to substantially trapezoidal shapes such as cross sectional shape, lens face and non-lens face
Clip the top surface parallel with screen cover and relative form.Now, top surface is preferably formed in the area for the reflection for being helpless to image light
Domain.At this time it is also possible to form reflecting layer on top surface, it can also be set to cover the form of top surface by hidden layer (protective layer).
(5) in embodiments, show that substrate layer 13 possesses the example of dyed layer 132 and light diffusion layer 131, but not
This is defined in, for example, it is also possible to be set to not possess dyed layer 132 and only possess the form of light diffusion layer 131.In this case,
Light diffusion layer 131 can also be set to except diffusion materials also and then containing the form of coloring material, lens jacket can also be set to containing having
The form of color material.
In addition it is also possible to it is set to following forms：Substrate layer 13 possesses dyed layer 132 and light diffusion layer 131, dyed layer
132 also contain light diffusion materials except colouring agent.
Further, light diffusion layer 131 and dyed layer 132 can also be formed respectively, by adhesive etc. engage and
It is set to substrate layer 13.
(6) in embodiments, following examples is shown：Image source LS is located at reflection type screen 10 in vertical direction
Lower section, image light L is agley projected from the lower section of reflection type screen 10；But this is not limited to, for example, it is also possible to be set to following
Form：Image source LS above reflection type screen 10, is agley thrown in vertical direction from the top of reflection type screen 10
Projection picture light L.
(7) reflection type screen 10 can also be set to wall etc. being set to supporting plate 50, the form engaged by bonding layer.
In addition, reflection type screen 10 can also be set to wind when not in use and the form that can be wound of keeping.
In the case of such form, the fabric or resin-made for being not provided with the grade of supporting plate 50, being difficult to pass through by light can also be set to
Shading curtain and/or make the covering reflection type screen 10 such as layer that scratch resistance improves rear side form.
Present embodiment and deformation form appropriately combined can also be used, and detailed description is omitted.In addition, the present invention is simultaneously
It is not limited to embodiments described above etc..
Symbol description
1st, image display system 10, reflection type screen
11st, lens jacket 111, single-element lens
112nd, lens face 113, non-lens face
12nd, reflecting layer 13, substrate layer
14th, superficial layer LS, image source.
Claims (7)
1. a kind of reflection type screen, make to reflect and be shown as from the image light of image source projection can from, the reflection-type screen
Curtain is characterised by possessing：
Lens jacket, its overleaf side with being arranged multiple with the convex single-element lens of lens face and non-lens face and surface side of supporting or opposing
It is classified as the annular Fresnel Lenses shape that concentric circles form；And
Reflecting layer, it is at least formed on a part for the lens face, the reflecting layer reflected light,
From the normal direction of screen cover, the concentric circles is centrally located at the region of the viewing area of the reflection type screen
Outside,
When the radius at the center away from the concentric circles of the lens face is set into r (mm), the lens face and put down with screen cover
Whole regions of the capable face angulation α (°) in the viewing area meets following formula：
-3.20779089934252×10-12×r4+1.70966116372389×10-8×r3- 3.57230633930145 ×
10-5×r2+ 0.0422019282210293 × r-0.544381670028088-5 ＜ α ＜ -3.20779089934252 ×
10-12×r4+1.70966116372389×10-8×r3- 3.57230633930145 × 10-5×r2+
0.0422019282210293 × r-0.544381670028088+5.
2. reflection type screen according to claim 1, it is characterised in that
The refractive index of the single-element lens is less than more than 1.45 1.65.
3. reflection type screen according to claim 1 or 2, it is characterised in that
The substantially rectangular shape of picture of the reflection type screen, is diagonally 100 inches, length-width ratio is 16：9.
4. reflection type screen according to any one of claim 1 to 3, it is characterised in that
When from the normal direction of screen cover, between the center of the concentric circles and the geometric center of the viewing area
Distance be more than 675mm below 695mm.
5. reflection type screen according to any one of claim 1 to 4, it is characterised in that
The arrangement pitch of the single-element lens is less than more than 50 μm 1000 μm.
6. a kind of image display system, it is characterised in that possess：
Reflection type screen according to any one of claim 1 to 5；And
To the image source of reflection type screen projection image light.
7. image display system according to claim 6, it is characterised in that
From the normal direction of the screen cover of the reflection type screen,
The image source is located at outside the region of the viewing area of the reflection type screen,
The image source be located at the geometric center by the center of the concentric circles and the viewing area and with it is described
On the parallel straight line of the orientation of single-element lens, and relative to the viewing area positioned at the center phase with the concentric circles
Same phase homonymy.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910220366.2A CN109917613B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
| CN202011501228.0A CN112558405B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015079976A JP6028829B1 (en) | 2015-04-09 | 2015-04-09 | Reflective screen, video display system |
| JP2015-079976 | 2015-04-09 | ||
| PCT/JP2016/061572 WO2016163526A1 (en) | 2015-04-09 | 2016-04-08 | Reflective type screen and video display system |
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| CN202011501228.0A Division CN112558405B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
| CN201910220366.2A Division CN109917613B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
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| CN107430326A true CN107430326A (en) | 2017-12-01 |
| CN107430326B CN107430326B (en) | 2021-05-07 |
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| CN201910220366.2A Active CN109917613B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
| CN202011501228.0A Active CN112558405B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
| CN201680018959.5A Active CN107430326B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
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| CN202011501228.0A Active CN112558405B (en) | 2015-04-09 | 2016-04-08 | Reflection type screen and image display system |
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| Country | Link |
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| JP (1) | JP6028829B1 (en) |
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| CN112255875A (en) * | 2020-11-10 | 2021-01-22 | 成都菲斯特科技有限公司 | Reflective lateral projection screen and projection system |
| CN114995041A (en) * | 2022-05-26 | 2022-09-02 | 成都菲斯特科技有限公司 | Projection screen and projection system |
| CN115185151A (en) * | 2019-04-10 | 2022-10-14 | 大日本印刷株式会社 | Reflecting screen and image display system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7435095B2 (en) * | 2020-03-18 | 2024-02-21 | 大日本印刷株式会社 | Reflective screens, reflective screen units and video display devices |
| CN115343909A (en) * | 2022-08-25 | 2022-11-15 | 青岛海信激光显示股份有限公司 | Projection screen and projection equipment |
| WO2024022515A1 (en) * | 2022-07-28 | 2024-02-01 | 青岛海信激光显示股份有限公司 | Projection screen, projection system, die and die master |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112558405A (en) | 2021-03-26 |
| WO2016163526A1 (en) | 2016-10-13 |
| CN112558405B (en) | 2022-09-27 |
| JP2016200684A (en) | 2016-12-01 |
| CN109917613B (en) | 2020-07-03 |
| JP6028829B1 (en) | 2016-11-24 |
| CN107430326B (en) | 2021-05-07 |
| CN109917613A (en) | 2019-06-21 |
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