CN108490728A - A kind of front projection screen that visual angle is controllable - Google Patents
A kind of front projection screen that visual angle is controllable Download PDFInfo
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- CN108490728A CN108490728A CN201810583973.0A CN201810583973A CN108490728A CN 108490728 A CN108490728 A CN 108490728A CN 201810583973 A CN201810583973 A CN 201810583973A CN 108490728 A CN108490728 A CN 108490728A
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- layer
- projection screen
- front projection
- visual angle
- angle according
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention discloses a kind of front projection screens that visual angle is controllable, including Fresnel Lenses layer, the circular mirror surface unit that if the Fresnel Lenses layer, which includes dried layer, to be arranged parallel to each other, each layer mirror unit includes circular working face, the operating angle of each working face is from both ends outside to center even variation, and each operating angle is continuously symmetrical changes.The present invention is by changing operating angle of each layer of mirror unit in circumferencial direction everywhere, to which circumferencial direction horizontal and upper and lower directions light energy allocation proportion everywhere can be changed, can improve the luminous energy of common circular Fresnel lens in the viewing areas of human eye up and down overshoot correction or so undercorrection the phenomenon that, realize effective control to the chief ray range at visual angle, enable the chief ray direction of downwards angle of visibility and horizontal view angle and meanwhile rationally inject human eye within the scope of, meet practical viewing demand, realizes preferable viewing experience.
Description
Technical field
The present invention relates to a kind of projection screen, more particularly to a kind of front projection screen that visual angle is controllable.
Background technology
Existing ultrashort burnt front projection screen is imaged by way of scattering mostly, such as white plastic curtain, is not had to ambient light
Selectivity, causes influence of the ambient light to drop shadow effect very big, and when ambient light is brighter, the contrast of Projection Display is lower,
Display effect is poorer.
In order to overcome disadvantages described above, people that circular Fresnel lens has been used to add scattering diluent to realize on the projection screen.
The off-centre operation structure that traditional circular Fresnel lens are arranged parallel to each other on front view for a circle circle, utilizes circular curvature pair
The chief ray direction of horizontal view angle is controlled, using the zigzag protrusion on circular Fresnel lens to the key light of upper downwards angle of visibility
Line direction is controlled.Circular Fresnel lens can not only change projector's chief ray in the reasonable layout in viewing space, go back
The influence that a part of ambient light can be eliminated, improves the contrast of screen, scattering diluent then provides viewing visual angle.By but in its own original
Reason is limited, and existing circular Fresnel lens are difficult that people is rationally injected in the chief ray direction of upper downwards angle of visibility and horizontal view angle simultaneously
Within the scope of eye, preferable viewing experience is realized.
Invention content
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, a kind of positive throwing that visual angle is controllable is provided
Shadow screen, by operating angle of each layer of mirror unit in different location for changing circular Fresnel lens layer so that operating angle
Circumferentially direction consecutive variations, to change the light energy allocation proportion of circumferencial direction level everywhere and upper and lower directions.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
A kind of front projection screen that visual angle is controllable, including Fresnel Lenses layer, if the Fresnel Lenses layer includes dried layer
The circular mirror surface unit being arranged parallel to each other, each layer mirror unit includes circular working face, each working face
Operating angle to center even variation (can gradually increase or be gradually reduced), and each operating angle be on the outside of both ends
Continuous symmetrical variation.
Operating angle of the present invention is the angle of the working face and substrate of Fresnel Lenses, by changing each layer of minute surface
Operating angle of the unit in circumferencial direction everywhere, to horizontal and upper and lower directions the light energy distribution everywhere of changeable circumferencial direction
Ratio can improve luminous energy overshoot correction or so correction up and down in the viewing areas of human eye of common circular Fresnel lens
Insufficient phenomenon realizes effective control to the chief ray range at visual angle so that the chief ray side of upper downwards angle of visibility and horizontal view angle
To within the scope of rationally can inject human eye simultaneously, meet practical viewing demand, realizes preferable viewing experience.
Preferably, the constant interval of the operating angle is less than or equal to 7 degree, achievable preferable visual angle school within the scope of this
Just, meet practical viewing demand.
Preferably, multiple cylinder micro units being vertically arranged are superimposed on each mirror unit.Projection ray passes through
When crossing the cylinder micro unit, the reflection of larger angle can occur along the component in screen level direction, so as to be carried for screen
For larger horizontal view angle, expands horizontal view angle using cylinder micro unit, improve the uniformity of screen.
Preferably, each mirror unit includes working face and interference surface, and the cylinder micro unit is set on described
On working face, facilitate processing, avoids generating additional interference light.
Preferably, the cylinder micro unit is arc rod structure or triangular prism structure, which is that cross-sectional edge is
The column structure of arc, and cylinder micro unit surface is relative to the mirror unit concave or convex.Including at least following
Three kinds of situations, first, the cylinder micro unit is made of the identical arc column of several sizes, all arc columns mutually interconnect
It connects and is arranged in array-like；Second, the cylinder micro unit is made of the identical triangular prism of several sizes, all trigones
Column is connected with each other and is arranged in array-like；Third, the cylinder micro unit is by the identical arc column of several sizes and several
The identical triangular prism of size is constituted, and all arc columns and the triangular prism are connected with each other and mix and be arranged in array-like.
Preferably, the Fresnel Lenses layer is fitted on supporting layer, and between the Fresnel Lenses layer and supporting layer
Equipped with reflecting layer.The reflecting layer is made of metal materials such as silver, aluminium, has high visible reflectivity, is used for episcopic projector
Incident light.
Preferably, the reflecting layer is positioned only on the working face of the mirror unit, is also sent out to can avoid interference surface
Life reflects and generates interference light, is conducive to the clarity and contrast that improve screen.
Preferably, the interference surface of the mirror unit is provided with pitch-dark film, to absorb ambient light, improves contrast.
Preferably, the layer of penetrating is bonded together by adhesive linkage and the supporting layer, and is mixed in the adhesive linkage
Black pigment improves contrast to absorb ambient light.
Preferably, the supporting layer is the curved-surface structure with concave curvature.Using the amount of curvature of curve support layer
The chief ray direction of horizontal view angle is controlled, to which screen gain can be improved, and entire screen is arranged to indent
The hard screen of curvature, can effectively improve the viewing uniformity, improve the contrast of entire screen, obtain better viewing experience.
Preferably, layer after the supporting layer includes support front layer, support middle level and supports, and the support middle level is honeycomb
Harden structure.Supporting layer plays the role of support protection to entire screen, and entire screen can be not only reduced using honeycomb plate structure
Weight, and intensity and environmental requirement can be met.
Preferably, the supporting layer is made using flexible material, to which entire screen can be bent, is not take up transport
Space can substantially save transportation cost.When mounted, it can crimp and be accommodated in house eminence, when use, just puts down, so as to
To reduce installation space, and avoid the problem of screen is chronically exposed in air, becomes easily infected by dust.
Preferably, the material of the supporting layer is cloth, polyurethane, PVC or PC.
Preferably, the screen further includes protective layer, dyed layer, smooth solid power layer and scattering layer.The protective layer is height
Molecular composite material layer, light transmittance is high, and screen can be effectively prevent to be scratched or be contaminated；The dyed layer is more than by transmitance
85% high transmittance resin uniformly adds pigment and is made, and the contrast of screen can be improved；The smooth solid power layer is using high saturating
Rate resin material, such as PET, PC, PMMA are crossed, the impact strength of screen and the tolerance to environment are can effectively improve, and
The basis of covering can be smeared as other layers；The scattering layer can be process by adding scattering diluent in colloid, to
Screen viewing visual angle is provided.
Preferably, the protective layer and dyed layer, which are processed as one, is combined into one layer, when processing in the colloid of protective layer
The pigment of the even mixing dyed layer, it is i.e. plastic after to be dried or photocuring.Both processing had been facilitated, and screen can be further decreased
The thickness of curtain helps to promote drop shadow effect.
Preferably, the dyed layer peace solidating power layer, which is processed as one, is combined into one layer, when processing, in PC, PMMA or PET
Uniform hybrid pigment in equal resins or monomer solution, then squeeze out the modes machine-shapings such as stretching or heat cure by being molded.Both side
Just it processes, and the thickness of screen can be further decreased, contribute to the clarity for promoting drop shadow effect.
Preferably, the smooth solid power layer and scattering layer, which are processed as one, is combined into one layer, when processing, in PC, PMMA or PET
Scattering diluent is uniformly mixed in equal resins or monomer solution, then squeezes out the modes machine-shapings such as stretching or heat cure by being molded.Both
Facilitate processing, and the thickness of screen can be further decreased, contributes to the clarity for promoting drop shadow effect.
Preferably, the dyed layer, smooth solid power layer and scattering layer three, which are processed as one, is combined into one layer, when processing,
Scattering diluent and pigment are uniformly mixed in the resins such as PC, PMMA or PET or monomer solution, then squeeze out stretching or heat cure by being molded
Etc. modes machine-shaping.Both processing had been facilitated, and the thickness of screen can be further decreased, and helped to promote the clear of drop shadow effect
Degree.
Preferably, the dyed layer and scattering layer, which are processed as one, is combined into one layer, in colloid of the transmitance more than 85%
Scattering diluent and coloring pigment are mixed, the colloid mixed is uniformly coated in PC, PMMA or PET sheet surface, then pass through
The modes machine-shaping such as photocuring or heat cure.Both processing had been facilitated, and the thickness of screen can be further decreased, and helped to be promoted
The clarity of drop shadow effect.
Preferably, the surface of the protective layer is processed as cloudy surface or hair side, prevents external environmental light from being generated in screen surface
Orienting reflex.
Preferably, the case hardness of the protective layer is more than 2H, prevents from scratching.
Preferably, the screen is additionally provided with the frame being connected to around the supporting layer and above layers, by each layer and branch
It supports laminated at an entirety, facilitates installation, transport and carrying.
Preferably, it is additionally provided with hook on the supporting layer, facilitates installation.
Compared with prior art, beneficial effects of the present invention：
1, the present invention is by changing operating angle of the mirror unit in circumferencial direction everywhere, everywhere to changeable circumferencial direction
Horizontal and upper and lower directions light energy allocation proportion, can improve sight of the luminous energy in human eye of common circular Fresnel lens
The phenomenon that seeing overshoot correction or so undercorrection above and below in region, realizes effective control to the chief ray range at visual angle so that
The chief ray direction of upper downwards angle of visibility and horizontal view angle can rationally be injected within the scope of human eye simultaneously, meet practical viewing demand, real
Now preferable viewing experience.
2, reflecting layer is positioned only on the working face of the mirror unit, to which reflection also occurs for avoidable interference surface and is produced
Raw interference light is conducive to the clarity and contrast that improve screen；Interference surface is provided in pitch-dark film or adhesive linkage and is mixed with
Black pigment improves contrast to absorb ambient light；It is superimposed with multiple columns being vertically arranged on each mirror unit
Face micro unit expands horizontal view angle using cylinder micro unit, improves the uniformity of screen.
3, the supporting layer is the curved-surface structure with concave curvature, is regarded to level using the amount of curvature of curve support layer
The chief ray direction at angle is controlled, and to which screen gain can be improved, and entire screen is arranged to have the hard of concave curvature
Matter screen can effectively improve the viewing uniformity, improve the contrast of entire screen, obtain better viewing experience；The support
Layer is made using flexible material, can be bent to entire screen, is not take up transport space, can substantially save transport at
This.When mounted, it can crimp and be accommodated in house eminence, when use just puts down, and so as to reduce installation space, and avoids
The problem of screen is chronically exposed in air, becomes easily infected by dust.
Description of the drawings：
Fig. 1 is the front view of the Fresnel Lenses layer described in the embodiment of the present invention 1.
Fig. 2 is the A-A sectional views of Fig. 1.
Fig. 3 is the B-B sectional views of Fig. 1.
Fig. 4 is the C-C sectional views of Fig. 1.
Fig. 5 is the light path schematic diagram (vertical direction) of the front projection screen described in the embodiment of the present invention 1.
Fig. 6 is the light path schematic diagram (horizontal direction) of the front projection screen described in the embodiment of the present invention 1.
Fig. 7 is the structural schematic diagram of the Fresnel Lenses layer with cylinder micro unit described in the embodiment of the present invention 2.
Fig. 8 is that the light path schematic diagram of the Fresnel Lenses layer with cylinder micro unit described in the embodiment of the present invention 2 is (horizontal
Direction).
Fig. 9 is the structural schematic diagram of the front projection screen described in the embodiment of the present invention 3.
Figure 10 is the structural schematic diagram of the front projection screen described in the embodiment of the present invention 4.
Figure 11 is the schematic diagram of the curve support layer curvature described in the embodiment of the present invention 5.
Figure 12 is the light path schematic diagram (horizontal direction) of the front projection screen described in the embodiment of the present invention 5.
Figure 13 is the structural schematic diagram of the front projection screen described in the embodiment of the present invention 7.
It is marked in figure：1- protective layers, 2- dyed layers, the smooth solid power layers of 3-, 4- scattering layers, 5- Fresnel Lenses layers, 51- mirrors
Face unit, 511- working faces, 512- interference surfaces, 513- substrates, 52- cylinder micro units, 6- hooks, the reflecting layer 7-, 8- adhesive linkages,
9- supporting layers, 91- support front layer, 92- to support middle level, layer after 93- supports, 10- frames, the pitch-dark films of 11-.
Specific implementation mode
With reference to test example and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
Embodiment 1
As Figure 1-Figure 4, a kind of front projection screen that visual angle is controllable, including Fresnel Lenses layer 5, the Fresnel are saturating
If mirror layer 5 includes the circular mirror surface unit 51 that dried layer is arranged parallel to each other, each mirror unit 51 includes circular work
Make face 511, interference surface 512 and substrate 513, the working face 511 of Fresnel Lenses is set as operating angle with the angle of substrate 513, often
The operating angle of one layer of mirror unit 51 from the outside of both ends to center even variation (can gradually increase or be gradually reduced,
If the operating angle of Fig. 2-Fig. 4 is gradually reduced, operating angle a ＜ b ＜ c), and the operating angle circumferentially continuous symmetrical variation, institute
The constant interval for stating operating angle is less than or equal to 7 degree.
As shown in Fig. 5-Fig. 6, by changing operating angle of each layer of mirror unit in circumferencial direction everywhere, to changeable
Circumferencial direction is horizontal everywhere and the light energy allocation proportion of upper and lower directions, can improve the light of common circular Fresnel lens
Having to the chief ray range at visual angle can be realized in the viewing areas of human eye the phenomenon that upper and lower overshoot correction or so undercorrection
Effect control so that (hang down i.e. in figure within the scope of capable of rationally injecting human eye simultaneously in the chief ray direction of upper downwards angle of visibility and horizontal view angle
Look at the convergence distance L2 of the horizontal view angles convergence distance L1 ≈ at angle straight), meet practical viewing demand, realizes preferable viewing body
It tests.
Embodiment 2
As shown in fig. 7, the present embodiment is with embodiment 1, difference lies on the working face 511 of each mirror unit 51
It is superimposed with multiple cylinder micro units 52 being vertically arranged, the cylinder micro unit 52 is arc rod structure or triangular prism structure,
And 52 surface of cylinder micro unit is relative to 51 concave or convex of the mirror unit, as shown in figure 8, utilizing cylinder micro unit
Expand horizontal view angle, improves the uniformity of screen.
Embodiment 3
As shown in figure 9, the present embodiment is with embodiment 1, difference lies in the Fresnel Lenses layer 5 is pasted by adhesive linkage 8
It closes on supporting layer 9, layer 93 after the supporting layer 9 includes support front layer 91, support middle level 92 and supports, the support middle level 92
For honeycomb plate structure, and reflecting layer 7 is equipped between the Fresnel Lenses layer 5 and supporting layer 9.The reflecting layer 7 is positioned only at
On the working face 511 of the mirror unit 51, to which reflection also occurs for avoidable interference surface and interference light is generated, is conducive to carry
The clarity and contrast of high screen.The interference surface 512 of the mirror unit 51 is provided with pitch-dark film 11, to absorb environment
Light improves contrast.
Embodiment 4
As shown in Figure 10, the present embodiment and embodiment 3 difference lies in the interference surface 512 of, the present embodiment be not provided with it is black
Paint film, but black pigment is mixed in the adhesive linkage 8, absorption ambient light can be equally played, the work of contrast is improved
With.
Embodiment 5
As shown in figure 11, the present embodiment the difference from example 2 is that, the Fresnel Lenses layer 5 is pasted by adhesive linkage 8
It closes on supporting layer 9, the supporting layer 9 is the curved-surface structure with concave curvature, the width W and curvature half of the supporting layer 9
The ratio of diameter R is W/R=1-10.
It as shown in figure 12, can be to water using the amount of curvature of curve support layer 9 when curve support layer 9 passes through in projection ray
The chief ray direction at head-up angle control effectively, and to which screen gain can be improved, and entire screen is arranged to indent
The hard screen of curvature, can effectively improve the viewing uniformity, improve the contrast of entire screen, obtain better viewing experience.
Embodiment 6
The present embodiment the difference from example 2 is that, the Fresnel Lenses layer 5 is fitted in supporting layer 9 by adhesive linkage 8
On, the supporting layer 9 is made using flexible material, and the material of the supporting layer is cloth, polyurethane, PVC or PC.To whole
A screen can be bent, and be not take up transport space, can substantially save transportation cost.When mounted, it can crimp and be accommodated in house
Eminence, when use, just put down, and so as to reduce installation space, and avoid screen and are chronically exposed in air, are easy to be stained with
The problem of contaminating dust.
Embodiment 7
As shown in figure 13, the present embodiment and embodiment 3 difference lies in, the screen further include protective layer 1, dyed layer 2,
Smooth solid power layer 3 and scattering layer 4, the dyed layer 2, smooth solid power layer 3 and 4 three of scattering layer are processed as one and are combined into one layer.
The screen is additionally provided with the frame 10 being connected to around the supporting layer 9 and above layers, by each layer and supporting layer 9
An entirety is synthesized, installation, transport and carrying are facilitated.It is additionally provided with hook 6 on the supporting layer 9, facilitates installation.
Above example is only to illustrate the present invention and not limits technical solution described in the invention, although this explanation
Book is with reference to above-mentioned each embodiment to present invention has been detailed description, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any modify to the present invention or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (14)
1. a kind of front projection screen that visual angle is controllable, including Fresnel Lenses layer (5), the Fresnel Lenses layer (5) is if include
The circular mirror surface unit (51) that dried layer is arranged parallel to each other, which is characterized in that each layer mirror unit (51) includes circle
Working face (511), the operating angle of each working face (511) on the outside of both ends to center even variation, and it is each described
Operating angle is continuous symmetrical variation.
2. a kind of controllable front projection screen in visual angle according to claim 1, which is characterized in that the variation of the operating angle
Section is less than or equal to 7 degree.
3. a kind of controllable front projection screen in visual angle according to claim 1, which is characterized in that each mirror unit
(51) multiple cylinder micro units (52) being vertically arranged are superimposed on.
4. a kind of controllable front projection screen in visual angle according to claim 3, which is characterized in that each mirror unit
(51) include working face (511) and interference surface (512), and the cylinder micro unit (52) is set on the working face (511).
5. a kind of controllable front projection screen in visual angle according to claim 3, which is characterized in that the cylinder micro unit
(52) it is arc rod structure or triangular prism structure, and cylinder micro unit (52) surface is relative in the mirror unit (51)
Recessed or evagination.
6. a kind of controllable front projection screen in visual angle according to claim 4, which is characterized in that the Fresnel Lenses layer
(5) it is fitted on supporting layer (9), and reflecting layer (7) is equipped between the Fresnel Lenses layer (5) and supporting layer (9).
7. a kind of controllable front projection screen in visual angle according to claim 6, which is characterized in that the reflecting layer (7) is only
It is arranged on the working face (511) of the mirror unit (51).
8. a kind of controllable front projection screen in visual angle according to claim 7, which is characterized in that the mirror unit (51)
Interference surface (512) be provided with pitch-dark film (11).
9. a kind of controllable front projection screen in visual angle according to claim 7, which is characterized in that the layer (7) of penetrating passes through
Adhesive linkage (8) and the supporting layer (9) bond together, and are mixed with black pigment in the adhesive linkage (8).
10. a kind of controllable front projection screen in visual angle according to claim 6, which is characterized in that the supporting layer (9) is
Curved-surface structure with concave curvature.
11. a kind of controllable front projection screen in visual angle according to claim 10, which is characterized in that the supporting layer (9)
Including layer (93) after support front layer (91), support middle level (92) and support, and the support middle level (92) is honeycomb plate structure.
12. a kind of controllable front projection screen in visual angle according to claim 6, which is characterized in that the supporting layer (9) is adopted
It is made with flexible material.
13. according to a kind of controllable front projection screen in any visual angles claim 1-12, which is characterized in that the screen
Further include protective layer (1), dyed layer (2), smooth solid power layer (3) and scattering layer (4).
14. a kind of controllable front projection screen in visual angle according to claim 13, which is characterized in that the protective layer (1)
It is processed as one to be combined into the peaceful solidating power layer (3) of one layer or the dyed layer (2) and be processed as one with dyed layer (2) and is combined into one
Layer or the smooth solid power layer (3) and scattering layer (4), which are processed as one, is combined into one layer or the dyed layer (2) and scattering layer
(4) it is processed as one and is combined into one layer or the dyed layer (2), smooth solid power layer (3) and scattering layer (4) three and is processed as one
It is combined into one layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583973.0A CN108490728A (en) | 2018-06-07 | 2018-06-07 | A kind of front projection screen that visual angle is controllable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583973.0A CN108490728A (en) | 2018-06-07 | 2018-06-07 | A kind of front projection screen that visual angle is controllable |
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| CN108490728A true CN108490728A (en) | 2018-09-04 |
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ID=63342148
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| CN201810583973.0A Pending CN108490728A (en) | 2018-06-07 | 2018-06-07 | A kind of front projection screen that visual angle is controllable |
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| CN114995041A (en) * | 2022-05-26 | 2022-09-02 | 成都菲斯特科技有限公司 | Projection screen and projection system |
| WO2022242304A1 (en) * | 2021-05-19 | 2022-11-24 | 成都菲斯特科技有限公司 | Projection screen and projection system |
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