CN109388013A - Projection screen and optical projection system - Google Patents
Projection screen and optical projection system Download PDFInfo
- Publication number
- CN109388013A CN109388013A CN201710663005.6A CN201710663005A CN109388013A CN 109388013 A CN109388013 A CN 109388013A CN 201710663005 A CN201710663005 A CN 201710663005A CN 109388013 A CN109388013 A CN 109388013A
- Authority
- CN
- China
- Prior art keywords
- projection
- projection screen
- plane
- layer
- surface micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a kind of projection screen and use the optical projection system of the screen.The projection screen includes the surface micro-structure layer being sequentially arranged from the incident side of the projection ray, light diffusion layer and reflection layer, wherein, the reflection layer is used to reflex to the incident projection ray in the field range of viewer, the light diffusion layer is used to increase the angle of divergence of the light of outgoing, and the surface micro-structure layer includes multiple surface micro-structure units, median vertical line of multiple surface micro-structure units in the plane of the projection screen relative to projection screen periodic arrangement in a manner of symmetrical, each surface micro-structure unit includes the first inclined-plane and the second inclined-plane of intersection.At least partly light from projector is reflected using the angle selective properties of the microstructure unit in reflecting layer, while but substantially not towards the viewing areas reflection environment veiling glare of viewer, therefore there is very strong environment resistant light characteristic, improves the contrast of image.
Description
Technical field
The present invention relates to projection screens and optical projection system.In particular it relates to can reduce the Fei Nie of screen surface
The projection screen of your loss and the optical projection system for using the screen.
Background technique
In recent years, with the continuous improvement of projector's brightness, projection display system is in the application of large scale home theater
Advantage starts to embody.Compared to LCD TV and OLED TV, the size of projection display system is small, is easily installed, can be light
Pine nut is now greater than 100 cun of display picture, and whole system price is relatively low.
Traditional projector is referred to as long focus projector, and the picture that this projector projects 80 cun on the screen usually needs
Want 3 meters or more of distance, transmitted ray on the screen, therefore is also known as delivering directly projector with the incident angles compared with very little.
Since the interior space is limited, long focus projector is often difficult to transmit big projected picture indoors, and then short focus is even ultrashort
Focus projector comes into being.Ultra short focal projector on the market can transmit 80 cun or more in the distance within 1 meter at present
Picture.
For the projection screen that cooperation ultra short focal projector uses, the projection ray from ultra short focal projector is being thrown
Incident angle on shadow screen is often larger, usually in the range of 40~75 degree.The a of Fig. 1 is shown from ultrashort out-of-focus projection
The schematic diagram of the incident angle of the projection ray of machine on the projection screen, b show 9 test points on projection screen, and c is shown
The relationship of incident angle and Fresnel reflection of the projection ray in 9 test points in b in a.In big incident angle
In the case of, Fresnel reflection rate of the incident ray in screen surface may be up to 25%.This part of Fresnel reflection occurs
Projection ray cannot be introduced into the field range of spectators, but the direction of ceiling has been arrived by screen reflection.To cause
The Fresnel loss of light.Currently, the above-mentioned Fresnel loss for the projection screen that cooperation ultra short focal projector on the market uses can
To be up to 25%.
In addition, projection display system is often installed in parlor in family's application environment.Parlor usually has well
Natural lighting condition and bright lighting source, thus there are a large amount of environment veiling glares.General projector screen can
The light of reflective projector also can reflection environment light light.In this environment, due to being affected by ambient light, through throwing
Contrast of the contrast for the picture that the light of shadow screen reflection is formed well below projector itself.In order to improve there are rings
Display Contrast in the case where the light of border, at present the projection screen of environment resistant light all use array microstructure add reflection layer or
The method of light absorbing layer is realized.But since the size of micro-structure is very small, spacing is generally in 25 to 250 microns of range
Interior, extremely complex in the technique of the coating optical functional layer of micro-structure surface selectivity, yield rate is low, and optical efficiency is not
It is high.
Summary of the invention
In view of the above-mentioned problems, one aspect of the present invention is intended to provide a kind of Fresnel loss that can reduce screen surface
Projection screen and optical projection system.
In addition, another aspect of the present invention can reduce the Fresnel loss of screen surface it is also expected to providing one kind
It is capable of the projection screen and optical projection system of environment resistant light simultaneously.
According to an embodiment of the invention, a kind of projection screen is disclosed, it can be anti-by the projection ray from projector
It is incident upon in the field range of viewer,
The projection screen includes surface micro-structure layer, the light diffusion layer being sequentially arranged from the incident side of the projection ray
And reflection layer, wherein
The reflection layer is used to reflex to the incident projection ray in the field range of viewer, described
Light diffusion layer is used to increase the angle of divergence of the light of outgoing, and
The surface micro-structure layer includes multiple surface micro-structure units, and multiple surface micro-structure units are in the throwing
The plane of shadow the screen interior median vertical line relative to the projection screen periodic arrangement, each surface in a manner of symmetrical
Microstructure unit includes the first inclined-plane and the second inclined-plane of intersection.A kind of projection system is disclosed according to another embodiment of the present invention
System, the system comprises projection screen as described above and the projectors.Wherein, the projector is preferably located at described
Ultra short focal projector below projection screen.
As described above, projection screen according to the present invention and optical projection system are due to being provided with surface micro-structure layer and surface
Microstructured layers have the surface micro-structure of periodic arrangement, can reduce the incidence of the projection ray of large angle incidence on the screen
Angle, the Fresnel reflection rate for reducing screen surface improve optical efficiency to reduce Fresnel loss.
In addition, it is further preferred that projection screen according to the present invention and optical projection system can also have the advantages that
(1) at least partly light from projector is reflected using the angle selective properties of the microstructure unit in reflecting layer,
Simultaneously but substantially not towards the viewing areas reflection environment veiling glare of viewer, therefore there is very strong environment resistant light characteristic, improves
The contrast of image.
(2) micro-structure reflects projection ray using total reflection principle, for absorbing the light absorbing layer of environment veiling glare
It is integrally provided at the back side of micro-structure, coated metal reflectance coating or light absorbing layer in micro-structure is not needed, reduces costs,
Improve yield rate.
It should be appreciated that beneficial effects of the present invention are not limited to said effect, and can be described herein any beneficial
Effect.
Detailed description of the invention
Fig. 1 shows the pass between projection ray in the prior art incident angle on the screen and Fresnel reflection rate
System.
Fig. 2 is to show the schematic diagram of projection screen and its surface micro-structure layer according to the present invention.
Fig. 3 is to show the structural schematic diagram of optical projection system according to an embodiment of the present invention.
Fig. 4 is to show the signal of the rotational symmetry structure in reflecting layer of projection screen according to an embodiment of the present invention
Figure.
Fig. 5 is to show the cross section structure of the microstructure unit in reflecting layer of projection screen according to an embodiment of the present invention to show
It is intended to.
Fig. 6 is to show the optical principle of the microstructure unit in reflecting layer of projection screen according to an embodiment of the present invention
Schematic diagram.
Fig. 7 is to show the selection schematic diagram of the optical tilt of micro-structure of projection screen according to an embodiment of the present invention.
Fig. 8 is to show the section of the microstructure unit and surface micro-structure unit of projection screen according to an embodiment of the present invention
Schematic diagram away from comparison.
Fig. 9 is to show the surface micro-structure unit of the surface micro-structure layer of projection screen according to an embodiment of the present invention
It arranges exemplary schematic diagram.
Figure 10 is to show the surface micro-structure unit of the surface micro-structure layer of projection screen according to an embodiment of the present invention
The exemplary schematic diagram of another arrangement.
Figure 11 is to show the surface micro-structure unit of the surface micro-structure layer of projection screen according to an embodiment of the present invention
The exemplary schematic diagram of another arrangement.
Figure 12 shows the screen that projection ray is incident on surface micro-structure layer and the prior art as shown in Figures 9 to 11
The comparison diagram of incident angle when on curtain.
Figure 13 show projection ray be incident on constant cant angle surface micro-structure layer and variation inclination angle surface it is micro-
The comparison diagram of incident angle when structure sheaf.
Figure 14 is to show the surface micro-structure unit of the surface micro-structure layer of projection screen according to an embodiment of the present invention
The exemplary schematic diagram of another arrangement.
Figure 15 is to show the comparison diagram of incident angle when projection ray is incident on different surface micro-structure layers.
Figure 16 be show projection screen according to an embodiment of the present invention surface micro-structure unit and microstructure unit it
Between relationship schematic diagram.
Specific embodiment
Each specific embodiment according to the present invention is described in detail next, with reference to attached drawing.It is emphasized that in attached drawing
All sizes are only illustrative and are not necessarily according to actual proportions diagram, because without limited.For example, should
Understand, thickness, thickness proportion and the angle of each layer are not according to actual size in the multilayered structure of the screen illustrated
With than what is exemplified, facilitate merely to illustrating.
One, projection screen and optical projection system are summarized
Fig. 2 shows the schematic diagrames of projection screen according to the present invention.The projection screen is by surface micro-structure layer 30, diffusion
Layer 40 and reflecting layer 50 are formed.Wherein, diffusion layer 40 and reflecting layer 50 can use any of suitable scheme.The micro- knot in surface
Structure layer 30 is the surface micro-structure layer for being provided with the surface micro-structure unit of periodic arrangement.The specific knot of surface micro-structure layer 30
Structure will be explained below.The projection ray of large angle incidence is incident to surface micro-structure layer 30, the table of periodic arrangement
Face microstructure unit can reduce incident projection ray in the Fresnel reflection rate of screen surface, make more light through table
Face microstructured layers 30 and diffusion layer 40 are incident to reflecting layer 50.Projection ray is after the reflection in reflecting layer 50 towards viewer's
The outgoing of visual field direction.Diffusion layer 40 is capable of increasing the angle of divergence of emergent ray.Therefore, such projection screen it is especially suitable with it is super
Short focus projector is used cooperatively.
In addition, although the reflecting layer 50 of projection screen according to the present invention can be used for projection screen using in the prior art
The reflecting layer of curtain.But other than the Fresnel reflection rate in addition to reducing screen surface, the preferred embodiment of the present invention is it is also expected to can
Further improve the environment resistant light ability of screen.It therefore, hereinafter will be to as projection screen according to the present invention
Preferred embodiment is illustrated.
Fig. 3 is to show the structural schematic diagram of the optical projection system of preferred embodiment in accordance with the present invention.As shown in Figure 3,
Optical projection system includes projection screen 10 and projector 20.Projection screen 10 include from the incident side of the projection ray of projector successively
The surface micro-structure layer 14 (corresponding with surface micro-structure layer 30 above) of arranged stacked, light diffusion layer 13 (with above
Diffusion layer 40 is corresponding), total reflection layer 12 (corresponding with reflecting layer 50 above).In addition, according to the preferred embodiment of the invention
Projection screen 10 further includes the light absorbing layer 11 with the incident side opposite side of projection ray positioned at total reflection layer 12.From throwing
The projection ray of shadow machine 20 is incident to total reflection layer 12 through surface micro-structure layer 14, light diffusion layer 13.Hereinafter, it will also throw
The incident side of the projection ray of shadow screen 10 is known as the outside (that is, towards viewer) of screen, and light absorbing layer side is known as shielding
The back side (that is, backwards to viewer) of curtain.Total reflection layer 12 is formed with microstructure unit array.Each microstructure unit includes two
The clinoplain of a intersection.The tilt angle of the two clinoplains is by accurate design, so that incident from 10 lower section of screen
Projection ray recur in two clinoplains and be totally reflected twice, be finally reflected onto the field range of viewer, and
Environment veiling glare above screen 10 is unable to satisfy the condition being totally reflected on two inclined surface, through total reflection
Layer 12 and absorbed by light absorbing layer 11.
As shown in figure 4, the microstructure unit of total reflection layer 12 is in screen plane with the array arrangement knot of rotational symmetry
Structure.Rotation center (optical centre) the axis normal to screen plane of the array arrangement structure of the rotational symmetry and it is located at screen
Lower section.Preferably, the central point of the projection lens of projector 20 is arranged in the center of rotation axis.
There is light absorbing layer 11 in the disposed inboard of total reflection layer 12, light absorbing layer 11 can absorb incident light on it
Beam.For example, light absorbing layer 11 is the light absorbing layer of black.Light diffusion layer 13 and table have been orderly arranged outside each in total reflection layer 12
Face microstructured layers 14.Light diffusion layer 13 is for spreading the collimated light beam reflected from total reflection layer 12, so that projection screen 10 has
There is bigger visible angle.Surface micro-structure layer 14 is located at the surface of the projection ray incident side of light diffusion layer 13 (that is, appearance
Face), multiple inclined surfaces (being discussed in detail below) including periodic arrangement can reduce the phenanthrene of large angle incidence light
Nie Er loss.Light diffusion layer 13 and surface micro-structure layer 14 can be formed one.In addition, in the outer of surface micro-structure layer 14
Side can also add setting protective layer to prevent scratch or chemical attack.It is, of course, also possible to be arranged according to the design needs other
Auxiliary functional layers.
Fig. 5 shows the main cross section knot of the microstructure unit of the total reflection layer 12 of projection screen according to an embodiment of the present invention
Structure schematic diagram.For clear diagram, other layers except total reflection layer 12 and light absorbing layer 11 are omitted in Fig. 5.Fig. 5 institute, institute
Show, total reflection layer 12 includes transparent substrate 120, microstructured layers 121 and la m 122.Transparent substrate 120 is located at total reflection layer 12
Near light diffusion layer side and contacted with light diffusion layer, wherein the transparent substrate 120 including PET, PC or PMMA etc. thoroughly
Bright material.The opposite side for the side of transparent substrate 120 contacted with light diffusion layer is arranged in microstructured layers 121.Wherein, described micro-
Structure sheaf 121 uses resin material, and the resin is usually epoxide-resin glue system, acrylic adhesive system, polyester adhesive system, polyurethane
Glue system or polyimides glue system etc..Transparent substrate 120 and microstructured layers 121 are formed by UV coating apparatus or thermal forming device
One.La m 122 is formed in the close light absorbing layer side of microstructured layers 121, and is in contact with light absorbing layer 11.In formation
The refractive index of the material of side layer 122 is lower than the refractive index for forming the material of microstructured layers 121.The microstructured layers 121 and inside
122 adjacent surface of layer are provided with multiple microstructure units.In each microstructure unit of total reflection layer 12, microstructured layers
121 are formed inclined intersection surface 124 and 125 there are two total reflection prism and tools.In other words, in total reflection layer 12
In each microstructure unit, microstructured layers 121 are the ribs of the row's rotational symmetry formed on the surface of transparent substrate 120
Mirror, intersection surface 124 and 125 be the material layer that both are different from la m 122 of microstructured layers 121 (that is, first material layer and
Second material layer) between interface.For example, such prism is by using to coil coating cloth resin and UV solidification or thermosetting chemical industry
What skill was process.It is clear in order to illustrate in Fig. 5, illustrate only two microstructure units.Projector below screen
Incident ray 123 is recurred at two clinoplains 124 and 125 and is totally reflected twice, is finally reflected into the visual field of viewer
In range.Environment veiling glare 127 mostlys come from the ceiling light in room.In most cases, micro- knot of the ceiling light far from screen
The rotation axis of the rotational symmetry structure of structure unit and the incidence angle of environment veiling glare 127 are much smaller than the incidence angle of projection ray
Degree.Therefore, environment veiling glare 127, which is unable to satisfy, recurs the condition being totally reflected twice in plane 124 and plane 125, exhausted big portion
Divide and has penetrated total reflection layer 12 and absorbed by light absorbing layer 11.Since light absorbing layer 11 is integrally provided in total reflection layer 12
Side so manufacturing process is simple, and not will lead to projection ray's loss.
As described above, the angle Selection sexual reflex of total reflection layer 12 is utilized in projection screen 10 according to an embodiment of the present invention
Characteristic, enables screen automatic distinguishing projection ray and ambient light.Surface micro-structure layer 14 has the more of periodic arrangement
A inclined surface, can reduce the incidence angle of incident ray, to reduce incident ray in the Fresnel loss of screen surface.This
Outside, the inside for being integrally provided at total reflection layer 12 for absorbing the light absorbing layer 11 of environment veiling glare.Therefore, real according to the present invention
The projection screen 10 for applying example has the ability of stronger environment resistant light and the Fresnel loss of lower screen surface, improves
The contrast of screen picture, improves optical efficiency, simplifies processing technology, improves yield rate.
Two, the optical principle and angle Selection of microstructure unit
Fig. 6 illustrates the optical principle of the microstructure unit of projection screen according to an embodiment of the present invention.As shown in fig. 6,
The refractive index of microstructured layers 121 is n1Refractive index with la m 122 is n2, two 124 Hes of clinoplain of microstructure unit
125 and the angle of screen plane (that is, vertical direction) are respectively θ1And θ2(unit is degree, similarly hereinafter).Incident ray and reflection light
Angle with horizontal direction is respectively α and β (unit is degree, similarly hereinafter).Wherein, when reflection light horizontal exit, β is obviously 0
Degree, and sets: when reflection light below horizontal line (that is, being biased to ground) β as negative value, when reflection light horizontal line with
β is positive value when upper (that is, being biased to ceiling).In order to occur that the incident ray from projector 20 twice on two inclined surface
It is emitted after total reflection towards the eyes direction of viewer, according to geometric optical theory and optical total-reflection condition, it is necessary to meet
Following formula (1)~(3):
θ can not be determined completely based on above-mentioned formula (1)~(3)1And θ2Value, also there are certain design freedoms.It is false
If the angle of intermediate rays and screen plane (that is, vertical direction) between incident ray and emergent ray is γ, and is set
When intermediate rays are biased to viewer side, γ is positive value, and when intermediate rays are biased to viewer side, γ is negative value.Then according to geometric optics
Principle and optical total-reflection condition can calculate:
By formula (4) and (5) as long as it is found that having determined the optical path of incident ray, emergent ray and intermediate rays (that is, really
Determine α, β and γ), so that it may the tilt angle theta of two intersecting planes of micro-structure is determined completely1And θ2。
In addition, being also known by formula (4) and (5), even if the case where the optical path of incident ray, emergent ray has been determined
Under, can also according to according to different application demands, by adjusting intermediate rays optical path (that is, value of adjustment γ) certain
To θ in range1And θ2Value selected.For example, projector is located at the lower section of screen, institute in the application of ultrashort out-of-focus projection
It is always set up with α > 0；And the eyes of spectators are located at the top of projector so alpha+beta > 0 is also always set up；In the case, by public affairs
Formula (1) is available:
θ1+θ2< 90 (6)
By formula (6) it is found that in the application of ultrashort out-of-focus projection, the microstructure unit of projection screen according to the present invention
Angle between two inclined surface is necessary for obtuse angle.
In addition, as the above analysis, there is a situation where such a preferred: the projection ray from ultra short focal projector
123 after the total reflection twice in succession of two clinoplains 124 and 125 of microstructure unit along vertical with screen plane
Direction (horizontal direction) outgoing, that is, β=0 degree.At this point, according to optical principle, twice in microstructured layers 121 between total reflection
The intermediate rays of middle traveling are advanced along the direction (vertical direction) for being parallel to screen plane, i.e. γ=0 degree and θ2=45 degree, θ1<
45 degree, i.e. θ1<θ2。
In addition, and including multiple micro-structures as described above, projection screen according to the present invention 10 has rotational symmetry structure
Unit.Therefore, the angle design of each microstructure unit can be same or different.For example, Fig. 7 is illustrated according to this hair
The simulative example of the optical angle of the microstructure unit of bright projection screen.The focus of projection screen shown in a of Fig. 7 is located at nothing
It is poor at a distance, in other words, in all microstructure units of total reflection layer 12, the emergent ray horizontally side of directive viewer
To so β=0 degree and θ2=45 degree are set up always.According to analog result it is found that the θ of microstructure unit1With close to screen
Top and be gradually reduced, and θ1<θ2, thus meet above-mentioned formula (6).In the example shown in the b of Fig. 7, the focus of projection screen
It is no longer at infinite point.In the case, along from screen lower section to the direction above screen, the micro-structure of total reflection layer 12
The θ of unit1Value constantly reduce and θ2Value constantly increase.
Three, the refractive index selection of microstructure unit
In addition to θ1And θ2Value except, by optical total-reflection formula it is found that meeting the microstructure unit that is totally reflected twice also
Refractive index n by microstructured layers 1211With the refractive index n of la m 1222Influence.Projection screen according to the present invention it is micro-
Structure sheaf 121 is usually made of transparent resin material, and refractive index is in the range of 1.3~1.7.Alternatively, microstructured layers
121, which also can be used the other materials with similar refractive index, is made.Furthermore it is also possible in the material that microstructured layers 121 are made
Middle doping scattered ion(s) or absorbing material etc..Thus, in order to meet the condition of total reflection, need to consider the refraction of la m 122
Rate n2Selection.For example, incident ray V can be expressed as (Vx,Vy,Vz), wherein z-axis normal to screen, and X, Y-axis are parallel to
Screen.Obviously, the total reflection region of incident ray depends on VxAnd VyValue range.VzMeet:
It is assumed that emergent ray is towards the eyes of viewer and the refractive index n of microstructured layers 1211It is 1.6, according to above-mentioned formula
(2) and (3) can obtain the component (V for meeting the incident ray of total reflection conditionx,Vy) value range with la m 122 folding
Penetrate rate n2Variation tendency.With n2Increase, meet and continuously sent out in two clinoplains of the microstructure unit of total reflection layer 12
It constantly reduces in the region of the raw incident ray being totally reflected twice.In other words, with n2Increase, from ultra short focal projector issue
Light can not increase in the probability that two clinoplains of the microstructure unit of total reflection layer 12 recur to be totally reflected twice.Cause
This needs to make n to guarantee certain screen reflection efficiency1And n2Meet:
n2<n1-0.2 (8)
It should be appreciated that la m 122 can be air layer in the case where meeting above-mentioned condition.In the case, micro- knot
The tip on two inclined-planes of structure layer 121 is directly bonded to light absorbing layer 11.
Four, the detailed description of surface micro-structure layer
As described above, being thrown to reduce the incident angle of the projection ray from ultra short focal projector on the projection screen
Projection ray's incidence side surface of shadow screen 10 is provided with surface micro-structure layer 14.Surface micro-structure layer 14 has multiple continuous cloth
The surface micro-structure unit set.Each surface micro-structure unit include the first inclined-plane and the second inclined-plane, wherein the first inclined-plane be towards
The inclined-plane of ultra short focal projector, and the second inclined-plane is backwards to the inclined-plane of ultra short focal projector.Projection ray is reduced in projection screen
On the function of incidence angle rely primarily on the first inclined-plane towards projector, and the inclined surface of rear projection machine does not have optics work
With.Therefore, by being arranged and adjusting inclination angle δ of first inclined-plane relative to screen plane, projection ray can be reduced and projected
Practical incident angle on screen, thus the reduction Fresnel loss of projection screen.In general, the inclination angle on the first inclined-plane is less than
The inclination angle on two inclined-planes is preferred.
Since ultra short focal projector is normally at the lower section middle position of projection screen, so surface micro-structure layer 14
Continuous multiple surface micro-structure units are arranged to symmetrically continuously arrange relative to the median vertical line line of screen.Surface micro-structure
Multiple micro-structures of the periodic arrangement of the multiple surface micro-structure units of periodic arrangement and above-mentioned total reflection layer 12 of layer 14
The arrangement mode of unit is not necessarily identical, and as shown in figure 8, the arrangement pitch of surface micro-structure unit and microstructure unit can
With identical or different.In addition, by Fig. 8 and Figure 16 it is found that incident angle and ε, the relationship of tilt angle δ are as follows:
Incident angle=ε-δ；
Therefore, inclination angle δ is bigger, and the practical incidence angle of projection ray on the projection screen is with regard to smaller.
Fig. 9 illustrates the example of the arrangement mode of the surface micro-structure unit of surface micro-structure layer 14 into Figure 11.Such as Fig. 9
Shown, the surface micro-structure unit of surface micro-structure layer 14 extends along vertical direction, and multiple surface micro-structure units exist
It symmetrically continuously arranges in horizontal direction relative to the median vertical line line of screen, wherein a of Fig. 9 shows surface micro-structure layer
14 plan view, the b of Fig. 9 show the enlarged diagram of stereoscopic schematic diagram and the first inclined-plane and the second inclined-plane.In Figure 10
Shown, the surface micro-structure unit of surface micro-structure layer 14 extends along inclined direction, and multiple surface micro-structure units exist
It symmetrically continuously arranges on the direction vertical with extending direction relative to the median vertical line line of screen, wherein a of Figure 10 is shown
The plan view of surface micro-structure layer 14, the b of Figure 10 shows stereoscopic schematic diagram and the amplification on the first inclined-plane and the second inclined-plane is shown
It is intended to.As shown in Figure 11, the surface micro-structure unit of surface micro-structure layer 14 extends along horizontal direction, and multiple surfaces
Microstructure unit is symmetrically continuously arranged relative to the median vertical line line of screen in vertical direction, wherein a of Figure 11 is shown
The plan view of surface micro-structure layer 14, the b of Figure 11 shows stereoscopic schematic diagram and the amplification on the first inclined-plane and the second inclined-plane is shown
It is intended to.
The surface micro-structure unit of surface micro-structure layer 14 shown in Fig. 9 to Figure 11 has been all made of easy design and processing
Linear arrangement mode.The projection ray from same projection machine is shown in Figure 12 is using above-mentioned three kinds of surface micro-structure layers
The comparison of the incident angle of 14 screen surface and traditional screen surface without containing clinoplain.The position of test point with
Position shown in Fig. 1 is identical, and the tilt angle on the first inclined-plane of above-mentioned three kinds of surface micro-structure layers 14 is disposed as 10
Degree.As shown in Figure 12, can be reduced using the surface micro-structure layer 14 of above-mentioned three kinds of structures compared to traditional flat screen
The incident angle of projection ray.
In addition, having Figure 12 it can also be seen that since the lower section that ultra short focal projector is usually located at projection screen hits exactly meta position
It sets, so the projection ray from same projector is actually distinguishing in the incident angle of the different location of screen.
Be easy to learn: square incidence angle is less than the incidence angle below screen on the screen for projection ray；Projection ray is in screen edge
Incidence angle be less than center Screen incidence angle.Therefore, using above-mentioned three kinds of linear arrangement modes, although can subtract on the whole
The incidence angle of small projection ray, but since the Fresnel reflection rate at the different location of screen surface is different, so screen surface
Brightness may be uneven.In order to keep the brightness of screen surface more uniform, following more preferred arrangement side can be used
Formula.
For example, the surface micro-structure unit when surface micro-structure layer 14 uses inclination or level as shown in Figure 10 and Figure 11
When microstructure unit, the inclination angle δ on the first inclined-plane can be with above screen lower section to screen in each surface micro-structure unit
And it is gradually increased.It is located under screen that is, the inclination angle δ on the first inclined-plane in the surface micro-structure unit being located above screen is greater than
The inclination angle δ on the first inclined-plane in the surface micro-structure unit of side.When the surface micro-structure unit of surface micro-structure layer 14 uses
When vertical microstructure unit as shown in Figure 8, the inclination angle δ on the first inclined-plane can be with from screen in each surface micro-structure unit
Center is gradually increased to screen sides.That is, the inclination angle δ on the first inclined-plane in the surface micro-structure unit being located on the outside of screen
Greater than the inclination angle δ on the first inclined-plane in the surface micro-structure unit being located on the inside of screen.Figure 13 shows each surface micro-structure
The incidence of projection ray when the inclination angle δ on the first inclined-plane of layer is fixed as 0 degree, 10 degree, 20 degree and when δ changes as described above
The comparison of angle.
In addition, it is further preferred that as shown in figure 14, the surface micro-structure unit of surface micro-structure layer 14 can also using with
The similar rotational symmetry structure of aforementioned totally reflected microstructure unit.When the surface micro-structure unit of surface micro-structure layer 14 is adopted
With relative to by projector the axis of symmetry rotational symmetry for being centrally and perpendicular to screen surface structure, so for same
For a surface micro-structure unit, the incident angle of projection ray is constant.It illustrates in Figure 15 and is set on the first inclined-plane
In the case where for 20 degree, horizontal surface microstructure unit as shown in Figure 11 and the micro- knot in rotational symmetry surface shown in Figure 14
The comparison that structure unit influences incident angle (number of test point is as shown in fig. 1).As seen from Figure 15, it is being located at screen
Horizontal symmetrical center point 1,2 and 3 at, the incident angle that the two reduces projection ray is identical, but as test point is close
On the outside of screen, the effect of rotational symmetry surface micro-structure unit is significantly better than horizontal surface microstructure unit.It is more preferable in order to obtain
Effect, the inclination angle δ on the first inclined-plane in each surface micro-structure unit of rotational symmetry can also be made with apart from the axis of symmetry
Distance increase and be gradually increased.
In addition, the projection ray from ultra short focal projector is incident to total reflection layer 12 through surface micro-structure layer 14, pass through
After reflection with total reflection layer 12, then through the outgoing of surface micro-structure layer 14.Therefore, the first inclined-plane of surface micro-structure unit
Above-mentioned tilt angle δ obviously will affect the setting of the tilt angle of two clinoplains in microstructure unit.As shown in figure 16,
It is assumed that the first inclined-plane of surface micro-structure unit is constant relative to the tilt angle δ of screen plane, incident projection ray and go out
The angle of the projection ray and horizontal direction penetrated is respectively ε and η, medium (under normal circumstances, air) refractive index outside screen
For n0.In the case, it is easy to derive the surface normal on the first inclined-plane of surface micro-structure unit and the angle of horizontal direction
It also is δ.In addition, can be calculated according to optical principle and surface refraction formula in refractive index is n1Above-mentioned microstructured layers 121
In the angle α and β and δ of incident ray and reflection light and horizontal direction as described in the text, relationship between ε and η it is full
The following formula of foot:
According to above-mentioned formula (9) and (10) it is found that the setting generation in order not to the clinoplain to total reflection layer 12 is unfavorable
It influences, the value range of inclination angle δ should be in the range of 0 50 < < δ.
Furthermore, it is possible to which the first inclined-plane and the second inclined-plane to surface micro-structure unit pass through sandblasting, chemical attack or other
Technique carry out surface roughening, thus enable surface micro-structure layer 14 reduce screen surface Fresnel loss it is same
When, have both the function of expanding the field range of screen.
It should be noted that the surface micro-structure layer 14 being described in detail in this part herein is applicable not only to above-mentioned set
It is equipped with the projection screen according to the preferred embodiment of the invention 10 of total reflection layer 12, but as previously mentioned, it can be adapted for
Use the projection screen in reflecting layer in the prior art.In other words, most important goal of the invention of the invention is to reduce to enter greatly
The projection ray of firing angle incidence projection screen surface Fresnel reflection rate, to improve the optical efficiency of screen.
Although above, with reference to the accompanying drawings of luminaire according to the present invention, but the invention is not restricted to this,
And it will be understood by those skilled in the art that in the case where the spirit or scope limited without departing from appended claim of the present invention,
Various changes, combination, secondary combination and modification can be made.
Claims (18)
- It is special in the field range that the projection ray from projector can be reflexed to viewer 1. a kind of projection screen Sign is,The projection screen includes surface micro-structure layer, light diffusion layer and the light being sequentially arranged from the incident side of the projection ray Reflecting layer, whereinThe reflection layer is used to reflex to the incident projection ray in the field range of viewer, and the light expands The angle of divergence that layer is used to increase the light of outgoing is dissipated, andThe surface micro-structure layer includes multiple surface micro-structure units, and multiple surface micro-structure units are in the projection screen The plane of the curtain interior median vertical line relative to the projection screen periodic arrangement, each micro- knot in surface in a manner of symmetrical Structure unit includes the first inclined-plane and the second inclined-plane of intersection.
- 2. projection screen according to claim 1, which is characterized in that first inclined-plane relative to the projection screen The inclination angle of parallel plane is less than or equal to inclination of second inclined-plane relative to the plane parallel with the projection screen Angle.
- 3. projection screen according to claim 1, which is characterized in that first inclined-plane relative to the projection screen The range of the inclination angle δ of parallel plane is 0 < δ < 50.
- 4. projection screen according to any one of claim 1 to 3, which is characterized in that first inclined-plane and described Two inclined-planes extend along horizontal direction, and each surface micro-structure unit is along vertical direction periodic arrangement.
- 5. projection screen according to claim 4, which is characterized in that the surface micro-structure unit above screen First inclined-plane the inclination angle be greater than be located at screen below the surface micro-structure unit first inclined-plane The inclination angle.
- 6. projection screen according to any one of claim 1 to 3, which is characterized in that first inclined-plane and described Two inclined-planes extend along vertical direction, and each surface micro-structure unit is along horizontal direction periodic arrangement.
- 7. projection screen according to claim 6, which is characterized in that the surface micro-structure unit on the outside of screen First inclined-plane the inclination angle be greater than be located at screen on the inside of the surface micro-structure unit first inclined-plane The inclination angle.
- 8. projection screen according to any one of claim 1 to 3, which is characterized in that each surface micro-structure unit It arranges in rotationally symmetrical fashion, and the center of rotation axis of each surface micro-structure unit is perpendicular to the projection The central point of the plane of screen and the camera lens by the projector.
- 9. projection screen according to claim 8, which is characterized in that described first in each surface micro-structure unit The inclination angle on inclined-plane is gradually increased as the distance to the center of rotation axis increases.
- 10. projection screen according to any one of claim 1 to 3, which is characterized in that first inclined-plane and described Two inclined-planes pass through surface roughening treatment.
- 11. projection screen according to any one of claim 1 to 3, which is characterized in that the reflecting layer includes at least position In the microstructured layers of the light diffusion layer side and la m positioned at the light absorbing layer side, the refractive index of the microstructured layers is big In multiple microstructure units are arranged in the refractive index of the la m, the microstructured layers, multiple microstructure units are in institute State be extended continuously in the plane in reflecting layer and rotational symmetry, each microstructure unit, wherein each microstructure unit includes Two intersecting planes be provided so that the projection ray is continuously totally reflected at described two intersecting planes.
- 12. projection screen according to claim 11, which is characterized in that the microstructured layers of each microstructure unit It is arranged to the total reflection prism of rotational symmetry, the angle point of described two intersecting planes and the plane for being parallel to the projection screen It Wei not θ1And θ2, and θ1And θ2Meet relationship: θ1+θ2< 90.
- 13. projection screen according to claim 12, which is characterized in that in multiple microstructure units, the θ1Tool There are different angles and the θ2It is equal to 45 degree.
- 14. projection screen according to claim 12, which is characterized in that in multiple microstructure units, the θ1Tool There are different angles, and the θ2Also there is different angles.
- 15. projection screen according to claim 11, which is characterized in that the refractive index n of the first material layer1With it is described The refractive index n of la m2Meet relationship: n2<n1-0.2。
- 16. projection screen according to claim 11, which is characterized in that the projection screen further includes anti-positioned at the light Penetrate the light absorbing layer of the back side of layer.
- 17. a kind of optical projection system, the system comprises projection screens as described in any one of claims 1 to 16 and described Projector.
- 18. optical projection system as claimed in claim 17, which is characterized in that the projector is located at below the projection screen Ultra short focal projector.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710663005.6A CN109388013B (en) | 2017-08-04 | 2017-08-04 | Projection screen and projection system |
| PCT/CN2017/114726 WO2019024367A1 (en) | 2017-08-04 | 2017-12-06 | Projection screen and projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710663005.6A CN109388013B (en) | 2017-08-04 | 2017-08-04 | Projection screen and projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109388013A true CN109388013A (en) | 2019-02-26 |
| CN109388013B CN109388013B (en) | 2022-02-11 |
Family
ID=65232298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710663005.6A Active CN109388013B (en) | 2017-08-04 | 2017-08-04 | Projection screen and projection system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109388013B (en) |
| WO (1) | WO2019024367A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650809A (en) * | 2019-03-04 | 2020-09-11 | 深圳光峰科技股份有限公司 | Wire grid structure, manufacturing method thereof and projection screen |
| CN112015040A (en) * | 2019-05-30 | 2020-12-01 | 深圳光峰科技股份有限公司 | Projection screen |
| CN112180673A (en) * | 2019-07-05 | 2021-01-05 | 深圳光峰科技股份有限公司 | Projection screen |
| CN112180670A (en) * | 2019-07-04 | 2021-01-05 | 深圳光峰科技股份有限公司 | Projection screen |
| WO2021004301A1 (en) * | 2019-07-05 | 2021-01-14 | 深圳光峰科技股份有限公司 | Projection screen |
| CN112363365A (en) * | 2019-07-24 | 2021-02-12 | 深圳光峰科技股份有限公司 | Projection screen and preparation method thereof |
| WO2021088883A1 (en) * | 2019-11-04 | 2021-05-14 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| WO2021088884A1 (en) * | 2019-11-05 | 2021-05-14 | 深圳光峰科技股份有限公司 | Direct projection screen |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018608A (en) * | 2019-04-10 | 2019-07-16 | 深圳市琻石科技有限责任公司 | The anti-light hard screen of one kind and its installation method |
| CN111856869A (en) * | 2019-04-28 | 2020-10-30 | 青岛海信激光显示股份有限公司 | Projection screen, projection system and laser television |
| CN112711172B (en) * | 2019-10-24 | 2023-07-07 | 深圳光峰科技股份有限公司 | Projection screen |
Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0905556A2 (en) * | 1997-09-26 | 1999-03-31 | Matsushita Electric Industrial Co., Ltd. | Rear projection screen |
| TW556042B (en) * | 2002-11-27 | 2003-10-01 | Mitsubishi Electric Corp | Transmission type screen and projection type display device |
| CN1482490A (en) * | 2002-09-13 | 2004-03-17 | ���ǵ�����ʽ���� | Color switching projection apparatus with two liquid crystal panels |
| CN1493891A (en) * | 2002-08-29 | 2004-05-05 | ���ձ�ӡˢ��ʽ���� | Diffusion film for transmission screen and transmission screen |
| CN1662850A (en) * | 2002-06-27 | 2005-08-31 | 大日本印刷株式会社 | Projection screen and projection display device |
| CN1666116A (en) * | 2002-09-24 | 2005-09-07 | 大日本印刷株式会社 | Fresnel lens sheet, transmission screen using this and rear transmission display unit |
| CN1685250A (en) * | 2002-11-22 | 2005-10-19 | 大日本印刷株式会社 | Fresnel lens sheet and transmission type screen comprising it |
| CN1725103A (en) * | 2004-07-20 | 2006-01-25 | 大日本印刷株式会社 | Rear projection screen |
| CN1839347A (en) * | 2004-04-26 | 2006-09-27 | 大日本印刷株式会社 | Fresnel lens sheet, transmission screen and rear projection display |
| CN1987638A (en) * | 2005-12-22 | 2007-06-27 | 株式会社日立制作所 | Image display, fresnel lens and screen used thereof |
| CN101109895A (en) * | 2003-02-28 | 2008-01-23 | 日本电气株式会社 | Picture display device and its manufacturing method |
| JP2009025672A (en) * | 2007-07-20 | 2009-02-05 | Ricoh Co Ltd | Image viewing device |
| CN101526730A (en) * | 2008-03-05 | 2009-09-09 | 精工爱普生株式会社 | Screen, projection system and manufacturing method of screen |
| CN101661215A (en) * | 2005-02-02 | 2010-03-03 | 大日本印刷株式会社 | Reflecting screen, method of manufacturing the same, and reflection-type projection system |
| CN101809498A (en) * | 2007-09-25 | 2010-08-18 | 夏普株式会社 | Screen |
| JP2013050646A (en) * | 2011-08-31 | 2013-03-14 | Dainippon Printing Co Ltd | Reflective screen and reflective projection system |
| CN103403618A (en) * | 2011-03-03 | 2013-11-20 | 日本电气株式会社 | Projection screen, projection-type image display device, and multi-projection system |
| US20130335459A1 (en) * | 2012-06-18 | 2013-12-19 | Stanley Electric Co., Ltd | Stereographic display apparatus and vehicle headlight |
| CN103809357A (en) * | 2013-09-16 | 2014-05-21 | 吴震 | Screen and projection display system |
| CN103809359A (en) * | 2013-08-02 | 2014-05-21 | 吴震 | Screen |
| US8861079B1 (en) * | 2013-05-29 | 2014-10-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Rear projection display screen and device |
| CN104111580A (en) * | 2013-04-16 | 2014-10-22 | 吴小平 | Horizontal back family black gate or fresnel back family stripe reflection projection screen |
| CN104317153A (en) * | 2014-09-09 | 2015-01-28 | 深圳市亿思达科技集团有限公司 | A screen for a projector and a projection system |
| US20150077849A1 (en) * | 2012-09-28 | 2015-03-19 | Dai Nippon Printing Co., Ltd. | Reflection screen and image display system |
| CN105785703A (en) * | 2014-12-26 | 2016-07-20 | 海信集团有限公司 | Super short-throw laser projection display screen and super short-throw laser projection device |
| JP2017116824A (en) * | 2015-12-25 | 2017-06-29 | 国立大学法人東北大学 | Reflection type screen and video image display system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3736476B2 (en) * | 2002-02-27 | 2006-01-18 | 日本ビクター株式会社 | Oblique projection screen |
| JP2008076523A (en) * | 2006-09-19 | 2008-04-03 | Toppan Printing Co Ltd | Reflection type screen |
| JP4743540B2 (en) * | 2006-11-29 | 2011-08-10 | 京セラ株式会社 | Wireless communication terminal device |
| JP5828227B2 (en) * | 2011-06-01 | 2015-12-02 | 大日本印刷株式会社 | Reflective screen and reflective projection system |
| JP2012252269A (en) * | 2011-06-06 | 2012-12-20 | Dainippon Printing Co Ltd | Reflective screen and reflective projection system |
| TWI494681B (en) * | 2014-06-16 | 2015-08-01 | Coretronic Corp | Projection screen and manufacturing method of projection screen |
-
2017
- 2017-08-04 CN CN201710663005.6A patent/CN109388013B/en active Active
- 2017-12-06 WO PCT/CN2017/114726 patent/WO2019024367A1/en active Application Filing
Patent Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0905556A2 (en) * | 1997-09-26 | 1999-03-31 | Matsushita Electric Industrial Co., Ltd. | Rear projection screen |
| CN1662850A (en) * | 2002-06-27 | 2005-08-31 | 大日本印刷株式会社 | Projection screen and projection display device |
| CN1493891A (en) * | 2002-08-29 | 2004-05-05 | ���ձ�ӡˢ��ʽ���� | Diffusion film for transmission screen and transmission screen |
| CN1482490A (en) * | 2002-09-13 | 2004-03-17 | ���ǵ�����ʽ���� | Color switching projection apparatus with two liquid crystal panels |
| CN1666116A (en) * | 2002-09-24 | 2005-09-07 | 大日本印刷株式会社 | Fresnel lens sheet, transmission screen using this and rear transmission display unit |
| CN1685250A (en) * | 2002-11-22 | 2005-10-19 | 大日本印刷株式会社 | Fresnel lens sheet and transmission type screen comprising it |
| TW556042B (en) * | 2002-11-27 | 2003-10-01 | Mitsubishi Electric Corp | Transmission type screen and projection type display device |
| CN101109895A (en) * | 2003-02-28 | 2008-01-23 | 日本电气株式会社 | Picture display device and its manufacturing method |
| CN1839347A (en) * | 2004-04-26 | 2006-09-27 | 大日本印刷株式会社 | Fresnel lens sheet, transmission screen and rear projection display |
| CN1725103A (en) * | 2004-07-20 | 2006-01-25 | 大日本印刷株式会社 | Rear projection screen |
| CN101661215A (en) * | 2005-02-02 | 2010-03-03 | 大日本印刷株式会社 | Reflecting screen, method of manufacturing the same, and reflection-type projection system |
| CN1987638A (en) * | 2005-12-22 | 2007-06-27 | 株式会社日立制作所 | Image display, fresnel lens and screen used thereof |
| JP2009025672A (en) * | 2007-07-20 | 2009-02-05 | Ricoh Co Ltd | Image viewing device |
| CN101809498A (en) * | 2007-09-25 | 2010-08-18 | 夏普株式会社 | Screen |
| CN101526730A (en) * | 2008-03-05 | 2009-09-09 | 精工爱普生株式会社 | Screen, projection system and manufacturing method of screen |
| CN103403618A (en) * | 2011-03-03 | 2013-11-20 | 日本电气株式会社 | Projection screen, projection-type image display device, and multi-projection system |
| JP2013050646A (en) * | 2011-08-31 | 2013-03-14 | Dainippon Printing Co Ltd | Reflective screen and reflective projection system |
| US20130335459A1 (en) * | 2012-06-18 | 2013-12-19 | Stanley Electric Co., Ltd | Stereographic display apparatus and vehicle headlight |
| US20150077849A1 (en) * | 2012-09-28 | 2015-03-19 | Dai Nippon Printing Co., Ltd. | Reflection screen and image display system |
| CN104111580A (en) * | 2013-04-16 | 2014-10-22 | 吴小平 | Horizontal back family black gate or fresnel back family stripe reflection projection screen |
| US8861079B1 (en) * | 2013-05-29 | 2014-10-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Rear projection display screen and device |
| CN103809359A (en) * | 2013-08-02 | 2014-05-21 | 吴震 | Screen |
| CN103809357A (en) * | 2013-09-16 | 2014-05-21 | 吴震 | Screen and projection display system |
| CN104317153A (en) * | 2014-09-09 | 2015-01-28 | 深圳市亿思达科技集团有限公司 | A screen for a projector and a projection system |
| CN105785703A (en) * | 2014-12-26 | 2016-07-20 | 海信集团有限公司 | Super short-throw laser projection display screen and super short-throw laser projection device |
| JP2017116824A (en) * | 2015-12-25 | 2017-06-29 | 国立大学法人東北大学 | Reflection type screen and video image display system |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650809A (en) * | 2019-03-04 | 2020-09-11 | 深圳光峰科技股份有限公司 | Wire grid structure, manufacturing method thereof and projection screen |
| CN112015040A (en) * | 2019-05-30 | 2020-12-01 | 深圳光峰科技股份有限公司 | Projection screen |
| US11892765B2 (en) | 2019-05-30 | 2024-02-06 | Appotronics Corporation Limited | Projection screen |
| CN112180670A (en) * | 2019-07-04 | 2021-01-05 | 深圳光峰科技股份有限公司 | Projection screen |
| CN112180670B (en) * | 2019-07-04 | 2023-04-07 | 深圳光峰科技股份有限公司 | Projection screen |
| CN112180673A (en) * | 2019-07-05 | 2021-01-05 | 深圳光峰科技股份有限公司 | Projection screen |
| WO2021004301A1 (en) * | 2019-07-05 | 2021-01-14 | 深圳光峰科技股份有限公司 | Projection screen |
| US11892766B2 (en) | 2019-07-05 | 2024-02-06 | Appotronics Corporation Limited | Projection screen |
| CN112363365A (en) * | 2019-07-24 | 2021-02-12 | 深圳光峰科技股份有限公司 | Projection screen and preparation method thereof |
| WO2021088883A1 (en) * | 2019-11-04 | 2021-05-14 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| US12117720B2 (en) | 2019-11-04 | 2024-10-15 | Appotronics Corporation Limited | Projection screen and projection system |
| WO2021088884A1 (en) * | 2019-11-05 | 2021-05-14 | 深圳光峰科技股份有限公司 | Direct projection screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109388013B (en) | 2022-02-11 |
| WO2019024367A1 (en) | 2019-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109388013A (en) | Projection screen and optical projection system | |
| CN207216263U (en) | It is totally reflected screen and optical projection system | |
| CN109388015A (en) | It is totally reflected screen and optical projection system | |
| JP6276777B2 (en) | Artificial lighting system that simulates natural light | |
| TW583422B (en) | Optical deflection elements and light source device | |
| CN109388012A (en) | Projection screen and optical projection system | |
| US11448952B2 (en) | Screen and projection system | |
| CN110297386B (en) | Curved screen, microstructure setting method thereof and projection system | |
| TW201723634A (en) | Projection screen | |
| CN205910490U (en) | Reflection of light micro -structure, projection screen and projecting system | |
| WO2021004301A1 (en) | Projection screen | |
| US10444616B2 (en) | Rear projection screen | |
| WO2019179124A1 (en) | Screen and projection system | |
| US11762275B2 (en) | Projection screen and projection system | |
| CN107632490A (en) | A kind of reflective micro-structural, projection screen and optical projection system | |
| CN109388014B (en) | Projection screen and projection system | |
| WO2021004303A1 (en) | Projection screen | |
| TWI728110B (en) | A projection screen | |
| WO2021088884A1 (en) | Direct projection screen | |
| KR20120069180A (en) | A variable reflective screen for short throw projector | |
| KR102303191B1 (en) | Screen for reflective projector | |
| CN112255873A (en) | Total reflection type lateral projection screen and projection system | |
| TW201428350A (en) | Lens structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |