CN106154730A - A kind of projection screen increasing contrast and brightness and preparation method thereof - Google Patents
A kind of projection screen increasing contrast and brightness and preparation method thereof Download PDFInfo
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- CN106154730A CN106154730A CN201610463152.4A CN201610463152A CN106154730A CN 106154730 A CN106154730 A CN 106154730A CN 201610463152 A CN201610463152 A CN 201610463152A CN 106154730 A CN106154730 A CN 106154730A
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- projection screen
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- 229920006335 epoxy glue Polymers 0.000 claims description 6
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Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses a kind of projection screen increasing contrast and brightness and preparation method thereof, including transmission layer and the scattering layer being positioned on transmission layer rear surface, described transmission layer is microlens array, some and lenticule one to one fringe area is distributed on described scattering layer, is extinction district between adjacent fringe area；The distribution of fringe area is as follows: as zero (0,0) at projected light vertical incidence, and the coordinate of the fringe area center that each lenticule is corresponding is (δx, δy), wherein, X, Y are the lenticule position coordinates at screen；L is the vertical dimension of projection screen distance projector；F is lenticular focal length.By fringe area on reflecting layer and the special distribution mode in extinction district, the present invention guarantees that all of light from projector is all scattered, and all ambient lights are all absorbed.
Description
Technical field
The present invention relates to a kind of projector equipment, be specifically related to a kind of projection screen increasing contrast and brightness.
Background technology
Projection screen is one of product most-often used in scialyscope peripheral equipment, and projection screen makes with scialyscope collocation
With, on the perspective plane of the enlarged drawing picture used by the image audiovisual of the displaying of exhibition, association etc. or movie theatre etc., employ various
Screen.
Projection screen generally can be divided into reflective, transmission-type two class；Reflective for just throwing, transmission-type is used for rear-projection；Just throw
Curtain is divided into again plane curtain, camber curtain；Plane curtain can be divided into glass bead screen, metal curtain, embossing plastics curtain, elastic curtain etc. from quality
(embossing plastics be divided into white mould, ash is moulded, silver is moulded).
In existing projection screen such as reflexive screen, there are the following problems: owing to reflecting the throwing from scialyscope
Shadow light and while showing projection picture, the ambient light light such as illumination that also reflects the external world, the sunlight etc. entered from window, institute
With in bright place, the contrast as " white (high-high brightness) " and the brightness of " black (minimum brightness) " reduces, thus is difficult to
Realize distinct image to show.
Such as, Authorization Notice No. is that the Chinese invention patent of CN203365902U discloses a kind of high definition 3D rear projection screen,
Including transmission layer, imaging layer and scattering layer, described transmission layer, described imaging layer and described scattering layer pressure viscosity successively connect, described
Scattering layer is irregular particle scattering layer.
The Chinese invention patent application document of Publication No. CN104317153A discloses a kind of screen for scialyscope,
Including the guide layer stacked gradually, beam splitter layer and basic unit；Described guide layer is used for guiding and enters with first direction scope from outside
The throw light penetrated is to the interface between described guide layer and beam splitter layer, and makes described throw light with more than in described interface shape
Become the incident angles of total reflection to described interface, be then reflected back the outside of described guide layer；Described guide layer is additionally operable to draw
Lead from outside with the ambient light of second direction range incident to the interface between described guide layer and beam splitter layer, and make described ring
Environmental light is less than or equal to forming the incident angles being totally reflected extremely described interface at described interface, to then pass through described interface
Enter beam splitter layer；The refractive index of described beam splitter layer is less than the refractive index of described guide layer.Reduce the dazzle caused due to ambient light
Phenomenon.
Traditional method solves this problem and can also become contrast reduction reason by suppression sunlight, illumination light etc.
Outer light impact and make minimum brightness reduce realize in room high-contrast.
Also there are the projection screen by ambient light being absorbed, the such as Chinese invention patent of Publication No. CN 103605258A
Application documents discloses a kind of environment resistant optical projection screen, it is characterised in that this rear projection screen is by projection imaging film, grating layer
And anti-dazzle photosphere is sequentially compounding, grating layer is compound in the front side surface of described projection imaging film, is provided with in this grating layer
Several horizontal and spaced ink layeies, described ink layer is used for absorbing ambient light, reduces ambient light and does imaging
Disturb；Described anti-dazzle photosphere is compound in the front side surface of grating layer, for anti-dazzle, eliminates mirrored effect..This projection screen passes through
One layer of grating layer of the surface recombination of projection imaging film, and absorb ambient light by the internal spaced ink layer of grating layer,
Thus reduce the impact of ambient light.But there are the following problems for this projection screen, it is impossible to guarantee that all light from projector can
Being projected, and all ambient lights can be absorbed, contrast increases DeGrain.
Summary of the invention
The present invention provides a kind of projection screen increasing contrast and brightness, and solving existing projection screen can not be by environment
The technical problem that light all absorbs, projected light all scatters or projects.
A kind of projection screen increasing contrast and brightness, including transmission layer and the scattering being positioned on transmission layer rear surface
Layer, described transmission layer is microlens array, and some and lenticule one to one fringe area is distributed on described scattering layer, adjacent
It it is extinction district between fringe area；The distribution of fringe area is as follows:
As zero (0,0) at projected light vertical incidence in the plane of projection screen place, each lenticule is corresponding
The coordinate of fringe area center is (δx, δy), wherein,
X, Y are the corresponding lenticule position coordinates at screen；
L is the vertical dimension of projection screen distance projector；
F is lenticular focal length.
At projected light vertical incidence, fringe area is positioned at the optical axis after corresponding lenticule, it is preferable that projected light is from screen
Center vertical incidence, the most preferably with screen center as zero.Under this preferred arrangement, the center of projection screen,
Fringe area is positioned at the optical axis after corresponding lenticule, fringe area be distributed in hypothesis projector from projection screen center with parallel
Setting on the basis of light incidence, when therefore using, projector is from projection screen center vertical incidence；As used in projection
Instrument cannot be incident at screen center occasion, then the distribution of fringe area with projector incident ray parallel incident at lenticule
For zero, the distribution of other position fringe areas is calculated by above-mentioned formula.
Screen of the present invention is made up of two parts, and a part is microlens array, and another part is the scattering material reflected by height
The scattering layer that material and black light-absorbing material mixing are formed, projector the light sent is irradiated on lenticule converge to this lenticule
On corresponding high specular scattering material, scattering is returned, and the ambient light in the external world is after lenticule, can converge in black light-absorbing material
On material, scattering will not be produced.The contrast of Projection Display can be increased by the method, reduce the impact of ambient light, owing to throwing
The when that shadow instrument working by day, external environmental light is the brightest, has a strong impact on contrast ratio of projector, for projector work by day
The when of work, this screen has and becomes apparent from effect.
Screen diverse location accepts different from the angle of the light of projector, in order to make scialyscope different in the present invention
Angular illumination can be scattered back to the light on screen, the high reflecting material scattering region on screen and black material extinction district
The screen diverse location that is distributed in territory is distributed different, by the special distribution of fringe area on reflecting layer with extinction district in the present invention
Mode guarantees that all of light from projector is all scattered, and all ambient lights are all absorbed.
Described fringe area is high reflecting material, and described extinction district is black light-absorbing material.
Described high reflecting material is titanium dioxide or barium sulfate powder, and described black light-absorbing material is carbon dust.
As preferably, in microlens array, the radius R of lens and the ratio range in lens cycle are between 0.55～2.5,
The lens cycle is 0.2mm～1mm.The described lens cycle refers to the distance between adjacent lens.
As preferably, the area in the inscattering district, region that lenticule each with microlens array is corresponding on described scattering layer
Account for 1/6～1/2.
The present invention also provides for the manufacture method of a kind of projection screen increasing contrast and brightness, and above-mentioned projection screen is preferred
Prepared by employing the method, comprise the steps:
(1) mould pressing method is used to prepare microlens array；
(2) by the rear surface spreading upon microlens array after scattering powder and ultraviolet glue mix homogeneously；
(3) use UV source light to irradiate microlens array, microlens array rear surface is irradiated by micro lens light beam
The epoxy glue in region solidify to form fringe area；
(4) after step (3) cured, uncured epoxy glue is washed away, then the most mixed in the coating of uncured region
The carbon dust closed and resin solution, dry formation extinction district.
As preferably, it is small-bore directional light scan mode that step (3) medium ultraviolet light source irradiates the method for microlens array.
Carry out the incident angle of light of projector during the incident angle simulation use of its ultraviolet light during the scanning of small-bore directional light.
As preferably, it is the work of big angle of visual field simulated projections machine that step (3) medium ultraviolet light irradiates the method for microlens array
Mode.
The big angle of visual field simulated projections i.e. ultraviolet source of machine working method and projector position is set and incident angle is consistent.
Preferably, ultraviolet source just center to projection screen, i.e. the lenticule of projection screen center, from ultraviolet
The parallel incidence of ultraviolet light of light source.
Mould pressing method is this area conventional method；Intensity and the irradiation time of ultraviolet light need regulation according to scene, so that
Scattering layer solidification is as the criterion.
Scattering powder uses this area routine scattering powder, such as, can select from titanium dioxide and barium sulfate powder.
Ultraviolet glue uses this area Conventional UV glue, such as, can select in 4201,414 from the 408 of LOCTITE.
In the manufacturing process of the present invention, the mixing quality ratio of scattering powder and ultraviolet glue, resin solution, the quality of resin solution
The mixing quality of concentration and carbon dust and resin solution is than all using this area conventional parameter.
The present invention also provides for increase contrast and the projection screen of brightness that a kind of described manufacture method prepares.
Compared with prior art, present invention have the advantage that
The light sent by projector in the present invention is irradiated on lenticule converge to the high specular scattering that this lenticule is corresponding
On material, scattering is returned, and the ambient light in the external world is after lenticule, can converge on black light-absorbing material, will not produce scattered
Penetrate.The contrast of Projection Display can be increased by the method, reduce the impact of ambient light.
The present invention guarantee all of from projector by the special distribution mode of fringe area on reflecting layer Yu extinction district
Light be all scattered, and all ambient lights are all absorbed.
Accompanying drawing explanation
Fig. 1 is the basic composition diagram of projection screen of the present invention.
Fig. 2 is the working state figure that the light that projector sends is radiated on screen.
Fig. 3 is the working state figure that ambient light is radiated on screen.
Fig. 4 is the angular distribution figure that screen receives the light that projector irradiation comes.
Fig. 5 a, Fig. 5 b and Fig. 5 c are that the light that projector sends state diagram when being irradiated to screen various location (is wherein schemed
5a be screen centre position, Fig. 5 b be screen edge locations for deviation screen centre position, Fig. 5 c).
Fig. 6 a and Fig. 6 b is microlens array schematic diagram.
Fig. 7 is the ultraviolet glue-line that microlens array back plane is coated with band scattering powder.
Fig. 8 is that solidification ultraviolet glue is irradiated in ultraviolet source scanning.
Fig. 9 is a kind of implementation of simulated projections machine working method illumination solidification ultraviolet glue.
Figure 10 is the another kind of implementation of simulated projections machine working method illumination solidification ultraviolet glue.
Figure 11 is the microlens array after exposure and ultraviolet glue-line.
Figure 12 is with the microlens array after solvent clean and ultraviolet glue-line.
Figure 13 is the microlens array after flour-carbon resin coating and ultraviolet glue-line.
Figure 14 be central area lenticule with fringe area coordinate schematic diagram.
Figure 15 is that upper right corner lenticule coordinates schematic diagram such as figure with fringe area.
Figure 16 is that upper left corner lenticule coordinates schematic diagram with fringe area.
Figure 17 is that lower left corner lenticule coordinates schematic diagram with fringe area.
Figure 18 is that lower right corner lenticule coordinates schematic diagram with fringe area.
Shown in figure, reference is as follows:
10-projection screen 20-projector 11-transmission layer
12-scattering layer 121-fringe area 122-extinction district
A-projector outgoing beam b-scattered light c-ambient light
111-lenticule
Detailed description of the invention
Projection screen 10 structure of the present invention is as it is shown in figure 1, be made up of two parts, and a part is for be made up of microlens array
Transmission layer 11 and be compounded in the scattering extinction distribution layer (scattering layer 12) at the microlens array back side, scattering extinction distribution layer dissipates
Penetrate in district 121 and extinction district 122 spaced apart.
Transmission layer 11 is formed (as shown in figures 6 a and 6b), in microlens array by some lenticule 111 array arrangements
The ratio range in the radius R of lens and the cycle of lens is between 0.75～2.5, and the cycle of microlens array is at 0.3 millimeter～1
Millimeter scope, a corresponding fringe area of lenticule.
It is different (as shown in Figure 4) owing to screen diverse location accepts the angle from the light of projector, ambient light
Light in order to make scialyscope different angles be irradiated on screen can be scattered back that (light that projector sends is radiated on screen
Working state figure as in figure 2 it is shown, in figure a be projector outgoing beam, b be scattered light), and ambient light is all absorbed (environment
Working state figure that light is radiated on screen as it is shown on figure 3, in figure c be ambient light, b be scattered light), the high reflecting material on screen
Material scattering region is different from the position distribution being distributed in screen different of black material absorbance region.Screen various location dissipates
Penetrate the distribution in district as and Figure 14～Figure 17 shown in, the light that various location projector sends is radiated at the working state figure on screen
As shown in Fig. 5 a～Fig. 5 c.
The distribution mode of fringe area is following (to be said in present embodiment as a example by supposition screen center is as zero
Bright):
With screen center as zero (0,0), the coordinate of the fringe area center that each lenticule is corresponding is (δx,
δy), wherein,
X, Y are the corresponding lenticule position coordinates (with corresponding lenticular center coordinate for the most accurate) at screen；
L is the vertical dimension of projection screen distance projector；
F is lenticular focal length.
It is positioned at the center of projection screen, at fringe area optical axis after corresponding lenticule (as shown in Fig. 5 a and Figure 14)；
Upper right corner lenticule coordinates schematic diagram as shown in figure 15 with fringe area；Upper left corner lenticule coordinates schematic diagram such as Figure 16 with fringe area
Shown in；Lower left corner lenticule coordinates schematic diagram as shown in figure 17 with fringe area；Lower right corner lenticule coordinates schematic diagram with fringe area
As shown in figure 18.
The manufacture method of projection screen of the present invention is as follows:
(1) conventional molding procedures is used to prepare microlens array (shown in Fig. 6 a and Fig. 6 b).
(2) will spread upon after scattering powder and ultraviolet glue mix homogeneously on the rear surface of microlens array (Fig. 7).
(3) ultraviolet light is used to irradiate microlens array, by micro lens light beam irradiated region on microlens array rear surface
The epoxy glue in territory solidify to form fringe area；It is small-bore directional light scan mode (figure that ultraviolet light irradiates the method for microlens array
8) or big angle of visual field simulated projections machine working method (Fig. 9 and Figure 10)；Microlens array after exposure and ultraviolet glue-line such as Figure 11.
(4) being washed away (Figure 12) by uncured epoxy glue after step (3) cured, consolidation zone forms fringe area
121, then coat mixed uniformly carbon dust and resin solution in uncured region, dry rear flour-carbon resin overlay area and form suction
Light district 122 (Figure 13).
Operation principle of the present invention is as follows:
The light that projector 20 sends is radiated at the state diagram on projection screen 10 as shown in Figure 2:
Projector outgoing beam a is radiated on microlens array, by projecting after micro lens and this lenticule pair
On the fringe area 121 answered, the light scattering from projector is returned to form scattered light b by fringe area.
Surrounding environment light is radiated at the state diagram on projection screen 10 as shown in Figure 3: ambient light c is converged to by lenticule
In the extinction district 122 that this lenticule is corresponding, fully absorbed by extinction district, scattered light b will not be produced.
The light that projector 20 sends on projection screen 10 state of various location as shown in Fig. 4 and Fig. 5 a～Fig. 5 b:
Screen diverse location accepts different from the angle of the light of projector, as shown in Figure 4, and projector outgoing beam
A is radiated at the light path on the lenticule of projection screen 10 various location as it is shown in figure 5, at screen centre position, fringe area
At 121 optical axises being positioned at corresponding lenticule 111, projector outgoing beam a horizontally enters in lenticule, is converged by after micro lens
Gathering on the fringe area at optical axis, fringe area all scatter and return to be formed scattered light b, ambient light is all absorbed by light-absorption layer,
Scattered light will not be formed；At deviation screen centre position and at screen edge locations, projector outgoing beam a is at a certain angle
In entrance lenticule, by converging to corresponding fringe area after micro lens, fringe area all scattering, ambient light is then
All absorbed by extinction district.
The foregoing is only the case that is embodied as of patent of the present invention, but the technical characteristic of patent of the present invention is not limited to
This, any those skilled in the relevant art in the field of the invention, the change made or modify all contain in the present invention special
Among profit scope.
Claims (8)
1. increase a projection screen for contrast and brightness, including transmission layer and the scattering layer being positioned on transmission layer rear surface,
It is characterized in that, described transmission layer is microlens array, is distributed and some dissipates one to one with lenticule on described scattering layer
Penetrate district, be extinction district between adjacent fringe area；The distribution of fringe area is as follows:
As zero (0,0) at projected light vertical incidence in the plane of projection screen place, the scattering that each lenticule is corresponding
The coordinate of district center position is (δx, δy), wherein,
X, Y are the corresponding lenticule position coordinates at screen；
L is the vertical dimension of projection screen distance projector；
F is lenticular focal length.
Increase contrast and the projection screen of brightness the most according to claim 1, it is characterised in that lens in microlens array
The ratio range in radius R and lens cycle be 0.55～2.5.
Increase contrast and the projection screen of brightness the most according to claim 2, it is characterised in that the lens of microlens array
Cycle is 0.2mm～1mm.
Increase contrast and the projection screen of brightness the most according to claim 1, it is characterised in that with micro-on described scattering layer
In lens arra, the area in the inscattering district, scattering layer region that each lenticule is corresponding accounts for 1/6～1/2.
5. the manufacture method of the projection screen increasing contrast and brightness, it is characterised in that comprise the steps:
(1) mould pressing method is used to prepare microlens array；
(2) by the rear surface spreading upon microlens array after scattering powder and ultraviolet glue mix homogeneously；
(3) ultraviolet source irradiation microlens array is used, by micro lens beam irradiation area on microlens array rear surface
Epoxy glue solidify to form fringe area；
(4) after step (3) cured, uncured epoxy glue is washed away, then at uncured region coating mix homogeneously
Resin solution and carbon dust, dry formation extinction district.
Manufacture method the most according to claim 5, it is characterised in that step (3) medium ultraviolet light source irradiates microlens array
Method is small-bore directional light scan mode.
Manufacture method the most according to claim 5, it is characterised in that step (3) medium ultraviolet light source irradiates microlens array
Method is big angle of visual field simulated projections machine working method.
8. a manufacture method as described in claim 5～7 any claim prepares increase contrast and brightness
Projection screen.
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| CN201610463152.4A CN106154730B (en) | 2016-08-11 | 2016-08-11 | A kind of projection screen for increasing contrast and brightness and preparation method thereof |
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| WO2020078189A1 (en) * | 2018-10-18 | 2020-04-23 | 深圳光峰科技股份有限公司 | Projection screen and processing method therefor |
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|---|---|---|---|---|
| WO2020042563A1 (en) * | 2018-08-27 | 2020-03-05 | 深圳光峰科技股份有限公司 | Projection screen and manufacturing method therefor |
| CN110865509A (en) * | 2018-08-27 | 2020-03-06 | 深圳光峰科技股份有限公司 | Projection screen and manufacturing method thereof |
| CN110865509B (en) * | 2018-08-27 | 2022-01-04 | 深圳光峰科技股份有限公司 | Projection screen and manufacturing method thereof |
| WO2020078189A1 (en) * | 2018-10-18 | 2020-04-23 | 深圳光峰科技股份有限公司 | Projection screen and processing method therefor |
| US11906891B2 (en) | 2018-10-18 | 2024-02-20 | Appotronics Corporation Limited | Projection screen and processing method therefor |
| WO2020114224A1 (en) * | 2018-12-04 | 2020-06-11 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
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| CN106154730B (en) | 2018-02-02 |
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