CN108398850A - Projection screen and optical projection system - Google Patents
Projection screen and optical projection system Download PDFInfo
- Publication number
- CN108398850A CN108398850A CN201810225934.3A CN201810225934A CN108398850A CN 108398850 A CN108398850 A CN 108398850A CN 201810225934 A CN201810225934 A CN 201810225934A CN 108398850 A CN108398850 A CN 108398850A
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- Prior art keywords
- screen
- screen board
- projection
- cloth
- board
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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
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
A kind of projection screen of present invention offer and optical projection system.The present invention projection screen, including the screen board of hard, soft connection cloth, be disposed around the screen board side screen frame and multiple flexible connectors；The front of the screen board is projection light-receiving surface, the connection cloth is arranged at the edge of the screen board, and the part connection cloth is located at except the edge extent of the screen board, the end that is located at the screen board edge extent outside of the first end of each flexible connector with the connection cloth connects, second end is connect with the screen frame, the connection cloth and the screen board are stretched to formation state by the pulling force of the flexible connector.The present invention can make screen board have higher flatness in fixed mask plate, while the integral thickness of projection screen is relatively thin.
Description
Technical field
The present invention relates to field of projection display more particularly to a kind of projection screen and optical projection systems.
Background technology
With the continuous development of science and technology, projection type display system is increasingly used in the work and life of people.
Laser projection is because of the gradual occuping market of the advantages that its colour gamut is wide, and brightness is high, long lifespan.Currently, projection is shown
The projection screen of system generally includes the variety classes such as supporting part and hard curtain.Wherein, hard curtain is because it is equal with good optical gain
Even property, color reducibility and flatness have preferable display effect.Fig. 1 is a kind of orthographic projection optical screen in the prior art
Structural schematic diagram.By taking a kind of orthographic projection optical screen as an example, hard curtain generally includes optical structure layers as shown in Figure 1：Coloring
Layer 101, diffusion layer 102, Fresnel Lenses layer 103 and reflecting layer 104 etc..Wherein, dyed layer 101 is located at the outermost of projection screen
Side, projection image's light beam is incident at first, is also emitted eventually by the layer, the main function of dyed layer is to improve projection screen
Color restoration capability, sometimes dyed layer 101 can also be substituted by substrate layer；Substrate layer includes dyed layer and hard film layer；Hard
Film layer primarily serves protective effect；Diffusion layer 102 is mainly used for non-uniform incident light and is homogenized, and by the angle of emergent light
It is enlarged；Fresnel Lenses layer 103 is used to carry out the light beam within the scope of incident certain angle to collimate parallel injection, and will
The light beam that reflecting layer 104 is reflected is dissipated.Reflecting layer 104 is usually aluminium mirror coating layer, is plated on the outer of Fresnel Lenses layer 103
Side.
As the size of projection screen constantly increases (size of mainstream projection screen is usually at 80 cun or more at present), in order to
More fragile hard curtain is fixed, and ensures the planarization of projection screen, generally use back plate type fixed structure is to hard curtain
It is fixed.Fig. 2 is the structural schematic diagram of back plate type fixed structure in the prior art.As shown in Fig. 2, specifically, back plate type is solid
It includes Decorative frame 201 and flat back-supported plank 204 to determine structure, and hard curtain 202 and back-supported plank 204 are led to
It crosses the fitting of bonding agent 203 to fix, then Decorative frame 201 is connected on back-supported plank 204, to complete to hard curtain 202
Support fix, the flatness of hard curtain 202 can be maintained by the rigidity of back-supported plank 204 in this way, avoids hard curtain 202
It is deformed.
However, hard curtain is fixed using monoblock back plate type fixed structure, on the one hand, the area of back-supported plank compared with
Greatly, large-sized plank is easy to happen the metabolies such as bulge, influences the flatness of the hard curtain of monoblock；On the other hand, large-sized
Back-supported plank has thicker thickness, and thickness and the weight for be easy to causeing projection screen are excessive, not readily transportable and suspension,
Limitation is brought to the enlargement of projection size.
Invention content
A kind of projection screen of present invention offer and optical projection system can be such that screen board has higher in fixed mask plate
Flatness, while the integral thickness of projection screen is relatively thin.
In a first aspect, the present invention provides projection screen, including the screen board of hard, soft connection cloth, it is disposed around screen
The screen frame of the side of plate and multiple flexible connectors；The front of screen board is projection light-receiving surface, and connection cloth setting is being shielded
The edge of curtain plate, and the edge for connecting cloth is located at except the edge extent of screen board, the first end of each flexible connector with
The edge connection of cloth is connected, second end is connect with screen frame, will connect cloth and screen board by the pulling force of flexible connector
It is stretched to formation state.
Second aspect, the present invention provide a kind of optical projection system, including projection arrangement and projection screen as described above, projection
Device is used to project projected picture to the screen board of projection screen.
The projection screen and optical projection system of the present invention, projection screen specifically include the screen board of hard, soft connection cloth,
It is disposed around the screen frame of the side of screen board and multiple flexible connectors；The front of screen board is projection light-receiving surface, connection
Cloth is arranged at the edge of screen board, and part connection cloth is located at except the edge extent of screen board, and the of each flexible connector
One end is connected with the end being located at except screen board edge extent for connecting cloth, and second end is connect with screen frame, to pass through
The pulling force of flexible connector will connect cloth and screen board is stretched to formation state.Soft cloth and flexible connector can be utilized real in this way
Existing fixation and positioning between screen board and screen frame makes screen board by the elasticity of flexible connector and is stretched in smooth
Exhibition state, and the integral thickness of projection screen is relatively thin, structure is more compact.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of orthographic projection optical screen in the prior art；
Fig. 2 is the structural schematic diagram of back plate type fixed structure in the prior art；
Fig. 3 is the structural schematic diagram for the projection screen that the embodiment of the present invention one provides；
Fig. 4 is the exploded perspective view for the projection screen that the embodiment of the present invention one provides；
Fig. 5 is the schematic cross-section for the projection screen that the embodiment of the present invention one provides；
Fig. 6 is the local connection diagram of screen frame in the projection screen that the embodiment of the present invention one provides；
Fig. 7 is the structure schematic diagram for the projection screen that the embodiment of the present invention one provides；
Fig. 8 is a kind of structural schematic diagram of flexible connector in the projection screen that the embodiment of the present invention one provides；
Fig. 9 is the partial structural diagram for another screen frame that the embodiment of the present invention one provides；
Figure 10 is the scheme of installation of screen frame in Fig. 9；
Figure 11 is a kind of structural schematic diagram for support element that the embodiment of the present invention one provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 3 is the structural schematic diagram for the projection screen that the embodiment of the present invention one provides.Fig. 4 is that the embodiment of the present invention one provides
Projection screen exploded perspective view.Fig. 5 is the schematic cross-section for the projection screen that the embodiment of the present invention one provides.Fig. 6 is this
The partial structural diagram of screen frame in the projection screen that inventive embodiments one provide.Fig. 7 is that the embodiment of the present invention one provides
Projection screen structure schematic diagram.As shown in Fig. 3 to Fig. 7, projection screen provided in this embodiment specifically includes hard
Screen board 1, soft connection cloth 2, be disposed around screen board side screen frame 3 and multiple flexible connectors 4；Screen
The front of plate 1 is projection light-receiving surface, and connection cloth 2 is arranged at the edge of screen board 1, and part connection cloth 2 is located at the side of screen board 1
Except edge range, the first end of each flexible connector 4 connects with the end being located at outside 1 edge extent of screen board for connecting cloth 2
Connect, second end is connect with screen frame 3, with by the pulling force of flexible connector 4 will connect cloth 2 and screen board 1 be stretched to it is smooth
State.
Wherein, the screen board 1 in projection screen is usually made of hard material, has larger rigidity and intensity, thus
When screen board 1 is stretched, more even curface can be formed.In this way, the front of screen board 1 is used as projecting
Light-receiving surface is shown so that picture and image are incident upon 1 front of screen board.
Hard material due to constituting screen board 1 usually has hard brittleness, if directly punched on the screen board of hard 1
Or fluting is fixed, and be easy to cause the cracking of screen board 1.In order to connect and fix the screen board 1 of hard, the throwing in the present embodiment
Shadow screen further includes having soft connection cloth 2, connection cloth 2 can be connected to hard screen board 1 edge, and with other fixations
Structure realizes connection, to complete the fixation to screen board 1.At this point, since connection cloth 2 is connected to the edge of screen board 1, thus
When connecting the stretching, extension of cloth 2 or shrinking, the light area for projecting image on screen board 1 can also be stretched, preferable to realize
Image display quality.It partly overlaps specifically, the fringe region of connection cloth 2 and screen board 1 generally has, connects cloth 2 in this way
It has subregion and screen board 1 is overlapped, and another part region is extend out on the outside of the edge of screen board 1, can be passed through in this way
The marginal portion of connection cloth 2 being located on the outside of 1 edge of screen board is connect with other structures.
Since screen board 1 is when carrying out image projection, usually it is arranged in vertical hanging, thus the screen board 1 of hard is easier to
It is naturally drooped because of own wt, at this point, screen board 1 mainly can will produce inward curl in the left and right sides or that opens outward shows
As.In order to allow screen board 1 to keep smooth, optionally, connection cloth 2 is connected under the upper edge region and screen board 1 of screen board 1
Fringe region.At this point, the upper edge region of screen board 1 and lower edge margin obtain the stretching of connection cloth 2, due to screen board 1
Usually width in the horizontal direction is more than the width on vertical direction, thus using connection cloth 2 to about 1 both sides of screen board into
Row is reinforced fixing, and inward curl or outer can not only occur to avoid upper and lower both sides, can also inhibit the curling of the left and right sides simultaneously
Phenomenon, to make entire screen board 1 all have preferable flatness in all directions.
Since connection cloth 2 is constituted for soft material, thus in order to allow connection cloth 2 to remain extended as, in projection screen also
Include multiple flexible connectors 4, flexible connector 4 itself has elasticity, thus when 4 one end of flexible connector is fixed on connection
On the end of cloth 2 being located on the outside of 1 edge of screen board, and the other end is connect with the screen frame 3 for being disposed around 1 side of screen board
When, the elasticity of itself can be relied on to strut connection cloth 2, it is smooth extended configuration to force connection cloth 2 to open.In general, being
The overall structure of simplified projection screen, the elastic force direction of flexible connector 4 is generally direction of pull, i.e., when flexible connector 4
When being connected between connection cloth 2 and screen frame 3, flexible connector 4 can will connect the screen frame 3 of cloth 2 outward and stretch,
Until screen frame 3 is flared to extended configuration.
At this point, since connection cloth 2 is connected to the edge of screen board 1, thus when connection cloth 2 flexes outward, it also can be to screen
The curtain formation of plate 1 stretches out, until screen board 1 extends to smooth state.At this point, screen board 1 can ensure it is preferable smooth
Property, make to be projected in 1 positive picture of screen board and image with preferable display effect, projected picture is avoided crooked and shape occur
Become.Simultaneously as connection cloth 2 is located at the edge of screen board 1 rather than the entire back side for being covered in screen board 1, so with existing skill
Screen board is that the structure of backboard is compared behind in art, and projection screen has relatively thin thickness, structure size more compact.
In this way, the projection screen in the present embodiment, it can be right by connecting cloth 2, flexible connector 4 and screen frame 3
Screen board 1 is fixed, while by the stretching action of the flexible connector in outside 4, it is in tensional state that can allow connection cloth 2,
And then drawing force also being applied to screen board 1 by the transmission of power so that the state for stretching expansion is also presented in the screen board 1 of hard,
Planarization is realized conducive to the screen board 1 of hard.
The concrete structure and operation principle of projection screen in the present embodiment are further elaborated below.
Optionally, the screen board 1 of hard can be usually made of hard layer, Fresnel structure layer and projection layer etc., be had
There are certain strength and stiffness, and there can be certain verticality that screen board has been seen under vertical free hang
It is next smooth, but due to still having certain softness, such as without support or by External force interference, the screen board 1 of hard can not still reach
To the flatness requirement needed for display, screen out-of-flatness deforms when laser projection picture will be made to show, is fuzzy, and brightness is not
Or other deteriorate problems.
And fixed to be realized to the screen board 1 of hard, using connection cloth 2 as connection structure.Connection cloth 2 generally has
The characteristics such as nonelastic, ultra-thin, fine and close and high intensity are easy to implement power when connection cloth 2 is connected with the edge of screen board 1 in this way
It transmits, screen board 1 is enable to follow the deformation of connection cloth 2 and generate stretching or curling.Specifically, connection cloth 2 generally can be with
For soft cloth.In this way connection cloth 2 can when being stretched preferable transmitting forces, and property is relatively stable, can adapt to more
Extensive environment, such as can keep preferable flatness and reliability between -10 DEG C to 40 DEG C of environment temperature.
Optionally, when connecting screen board 1 with cloth 2 is connect, or can usually adhesive be taken to be bonded, Huo Zheli
It completes to connect with forms such as nylon adherent buckles.When using bonding agent between screen board 1 and connection cloth 2, that is, allow the back of the body of screen board 1
Face with when connecting cloth 2 and bonding together, between the edge and connection cloth 2 of screen board 1 will not there are space and gap, because without
The display of projected picture is influenced because of air flowing when temperature change (especially air-flow is brought to flow) in the two gap.
Optionally, projection screen can also include protective cloth, protective cloth cover screen back with positive light area
Opposite region.This is because the screen board 1 of hard is optical structure layers, there is certain light transmittance, screen is thrown especially as positive
When curtain, most one layer of the inside is reflecting layer, the acting surface in reflecting layer be (such as aluminizer) is reflected to projection light, but due to
It can not accomplish that 100% reflectivity, all part light that have penetrate, the decline of picture contrast can be caused in this way.Therefore, shielding
The back side of curtain plate 1 is specifically the back side of aluminium film, can carry out shading using the protective cloth of dark (being, for example, black), favorably
Do not revealed in light, while the scuffing of the screen back side can also be prevented etc., it plays a protective role to aluminium film and each optical structure layers.Protection
Cloth can be various material, such as by fibrous material, the common sunscreen protection material of plastics or those skilled in the art institute
Deng.
Cloth 2 is connected in the edge fitting with screen board 1, it can be there are many different connection types.For example, connection cloth 2
It can be only bonded with the front of screen board 1, that is, be covered in 1 positive fringe region of screen board, at this point, a side of connection cloth 2
Edge namely an end can be with 1 front fittings of screen board, and another lateral edges, that is, the other end is located at the marginal zone of screen board 1
Except domain.
Alternatively, connection cloth 2 can also be bonded with the back side of screen board 1, that is, it is covered in the fringe region at 1 back side of screen board
On, the one side edge of cloth 2 is connected in this way, i.e. an end can be bonded with the back side of screen board 1, another lateral edges, that is, the other end
Except the fringe region of screen board 1.
Again alternatively, connection cloth 2 can also fit in the front and back of screen board 1 simultaneously, connection cloth 2 is " U "-shaped at this time,
The blind end of " u "-shaped is the end on the outside of 1 edge of screen board, can be used for connecting with structures such as flexible connectors 4, and structure
At two layers of opening connection cloth of " u "-shaped by the edge sandwiched of screen board wherein, to be attached between cloth 2 and screen board 1
Be connected and fixed.As shown in Figure 5 and Figure 6, the connection cloth that can be located at 1 upper edge region of screen board is fitted in screen board simultaneously
1 front and the back side, wherein it is connection cloth 2a that it is positive, which to be attached to screen board 1, and it is connection cloth 2b to be attached to 1 back side of screen board；
And need the active force born smaller positioned at the connection cloth in 1 lower edge region of screen board, it can only be pasted in the side of screen board 1
It closes, is e.g. fitted in the back side of screen board 1.
In general, due to either carrying out gluing using adhesive, or connected using structures such as nylon adherent buckles, screen board
Bonding strength between 1 and connection cloth 2 is usually all directly proportional with fitting area between the two.In order to ensure to connect cloth 2 and screen
The reliability that connects between curtain plate 1 can usually allow connection cloth 2 to connect the front and back of screen board 1 simultaneously, shield to improve
Bonding strength between curtain 1 edge of plate and connection cloth 2.
Further, connection cloth 2 is with the back side in the front of screen board 1 and screen board 1 when being bonded, and can allow and screen
The width for the connection cloth 2b that the width of the connection cloth 2a of the front fitting of plate 1 is less than and the back side of screen board 1 is bonded.It is located in this way
The width of the positive connection cloth 2a of screen board 1 is smaller, can form relatively narrow border width；And positioned at the company at 1 back side of screen board
Larger connection area can be realized by meeting cloth 2b, ensure being reliably connected between connection cloth 2 and screen board 1.In general, usually may be used
To make way for the width that the positive connection cloth 2a of screen board 1 keeps 10mm or so, and with the connection cloth 2b of 1 back side of screen board fitting
Keep the width of 50mm or so.
In general, for connecting screen board 1 and connecting the adhesive of cloth 2, usually has and screen board 1 is close or identical
Coefficient of thermal expansion, or with certain ductility, such screen board 1 is generated because of temperature change when expanding with heat and contract with cold, and is glued
Mixture can play certain cushioning effect, reduce screen board 1 because expanding with heat and contract with cold deformation due to the influence caused by projected picture, also have
Conducive to the flatness of hard screen board 1 is maintained, prevent because the two coefficient of expansion is different, expansion and contraction is different so that screen board 1 produces
Raw stress, and influence flatness.
For connect and be located by connecting cloth 2 and screen board 1, screen frame 3 is generally tower structure, and screen frame
3 surround the hollow region of a rectangle or square, which can be used for placing screen board 1, and screen frame 3 can
To be centered around except the edge of screen board 1, protection is provided for screen board 1, and passes through elasticity between screen frame 3 and connection cloth 2
Connector 4 realizes connection.The concrete structure and connection relation of screen frame 3 as shown in Fig. 3 to Fig. 7, wherein for ease of narration,
It is illustrated by taking the screen frame of 1 the upper side and lower side of screen board as an example.It is understood that the left and right sides of screen frame 3
Structure also has structure similar with upper and lower both sides and connection relation, and details are not described herein again.
Specifically, and using flexible connector 4 realize connection cloth 2 and screen frame 3 between connection when, connection cloth 2,
It can be there are many different structure and relative position between flexible connector 4 and screen frame 3.It is optional as one of which
Embodiment, the size of screen frame 3 can be more than the size of connection cloth 2, thus screen frame 3 is located at the edge of connection cloth 2
Outside.At this point, the first end of flexible connector 4 is attached on connection cloth 2, specific connection cloth is located at 1 edge of screen board
Side outside range, and the second end of flexible connector 4 is protruding from the edge of connection cloth 2, and be fixed on positioned at connection cloth 2
On the screen frame 3 in outside, it can rely on flexible connector 4 that will connect cloth 2 in this way and be fixed on the center of screen frame 3, and according to
Elastic force by flexible connector 4 stretches connection cloth 2, and connection cloth 2 is allowed to keep smooth extended configuration.
And due to being arranged screen frame 3 on the outside of the edge of connection cloth 2, and flexible connector 4 is located at 2 edge of connection cloth
Outside connection type, will include flexible connector 4 and screen frame 3, thus the screen of projection screen in connection cloth 2 outside
1 outside of curtain plate can have wider frame region, the frame region that can be adversely affected to the visual effect of projected picture.For
Reduce the size of the frame region in 1 outside of screen board, other positions can be arranged in flexible connector 4, to reduce elastic connection
The 1 positive size of screen board of part 4 and screen frame 3 in projection screen.
As another optional embodiment, screen frame 3 may include outer support portion 31, outer support portion 31
Support is at the back side at the edge of screen board 1, and the edge of outer support portion 31 is located at except the edge extent of screen board 1, connects cloth 2
Edge extend out to the outside of outer support portion 31 after reversely bend, with package outer support portion 31 edge after with elasticity even
Fitting 4 connects.
Wherein, due to the fitting of the marginal portion of connection cloth 2 and screen board 1, thus 31 meeting of outer support portion and connection cloth 2 paste
It closes, and abuts the edge back side for being supported on screen board 1.Since screen frame 3 is generally hard structure, so outer support portion 31
Good contact, which supports, can be realized to the back side of screen board 1 by soft connection cloth 2.Meanwhile outer support portion 31
In the outer of screen frame 3, that is, the outermost regions of screen frame 3.After connecting cloth 2 and the connection of screen board 1, cloth 2 is connected
Edge be located at except the edge of screen board 1, and can continue it is protruding, and from the outside of outer support portion 31 around screen frame
The rear area of frame 3 gets up the edge wrap of outer support portion 31, then is attached between flexible connector 4.In this way,
Connection cloth 2 is equivalent to hanging on the edge of outer support portion 31, and the edge of outer support portion 31 then can be used as supporting-point pair
Connection cloth 2 is supported.At this point, the edge of outer support portion 31 can be equivalent to a fixed pulley, make 31 side of outer support portion
The connection cloth 2 of edge both sides is moved by the support of outer support portion 31 to two different directions, when flexible connector 4 is external
When connection cloth 2 along the 31 edge back side of support portion applies the pulling force that direction is 31 edge of separate outer support portion, it is located at outer branch
The positive connection cloth in 31 edge of support part 2 will be reversed pulling, and be moved to close to the direction at 31 edge of outer support portion, to
It is stretched and is stretched.
Since outer support portion 31 can change the force direction suffered by connection cloth 2, thus flexible connector 4 is set
Seated position is no longer limited on the outside of the edge of connection cloth 2, but can be arranged within the coverage area when connecting cloth 2 and stretching.
Optionally, the first end of flexible connector 4, that is, the one end connected with the edge for connecting cloth 2 can be located at flexible connector 4
Second end outside.At this point, flexible connector 4 can be hidden in the back side direction of screen board 1,4 meeting of such flexible connector
It is covered by the screen board 1 in front and connection cloth 2, is difficult to see that from the front of projection screen.Such set-up mode, screen board
Region on the outside of 1 edge no longer has flexible connector 4, and only only includes connection cloth 2 and screen frame 3, so being formed
Frame region have lesser width, can effectively promote the appearance display effect of projection screen.
In addition, the section of screen frame 3 can be generally hollow shape, e.g. hollow, rectangular etc., and due to screen frame
The cross-sectional hollow of frame 3, thus reinforcing beam or ribs can be provided in the internal cavities in section, to improve screen frame 3
Overall construction intensity.
In addition, it is optional, since screen board 1 is usually made of hard material, will produce in extraneous variation of ambient temperature
It expands with heat and contract with cold phenomenon.And when screen board 1 expands with heat and contract with cold, if the edge of screen board 1 has been more than the outer of screen frame 3
Edge may then will produce phenomena such as colliding with.In order to ensure the image quality of projection, the edge of outer support portion 31 is usually located at screen
Except the edge of curtain plate 1.Screen frame 3 can provide enough positioning and guarantor when external environment changes for screen board 1 at this time
Shield.
In the connection type at the edge of above-mentioned connection cloth 2, direction of pull and the screen board 1 of flexible connector 4 can be allowed
The plane keeping parallelism at place connects subparallel angle.Two aspect benefits can be brought in this way：On the one hand it can reduce throwing
The overall volume and thickness of shadow screen, when flexible connector 4 is when generating elastic deformation, elastically-deformable direction is located at screen board
In the plane at place, or with the plane have smaller angle, thus the deformation quantity on the thickness direction of projection screen compared with
It is small, the thickness of projection screen can be effectively reduced；On the other hand, when 1 place of the direction of pull of flexible connector 4 and screen board
It when plane is parallel, is also easy so that screen board 1 extends along the planar stretch where itself, it is ensured that screen board 1 is in same always
It in one plane, avoids the direction of pull due to flexible connector 4 not parallel with the plane where screen board, and screen board 1 is made to exist
Distortion is generated on other directions.
And when realizing the connection between flexible connector 4 and screen frame 3 or connection cloth 2, according to flexible connector 4
Type and structure difference, flexible connector 4 and connection cloth 2 between and flexible connector 4 and screen frame 3 between
Also there can be a variety of different connection types.Wherein, because screen frame 3 is rigid body, it is possible to using clamping, screw threads for fastening
Part connects or the common fixed forms such as riveting link together with flexible connector 4.And since connection cloth 2 is more soft
Material constituted, be not easy to be directly connected to flexible connector 4, thus usually also need to the fixed rigidity on connection cloth 2
Connection structure, and will connect cloth 2 and flexible connector 4 using the connection structure and link together.
As a kind of optional connection type, the edge of connection cloth 2 is provided at least one be used for and the company of flexible connector 4
The rigid anchor 21 connect.In order to allow connection cloth 2 and rigid anchor 21 to connect, the edge of connection cloth 2 can surround closed
Shape, such rigid anchor 21 can be fixed on the close-shaped inside, it is thus achieved that rigid anchor 21 and connection
Fixation between cloth 2.Rigid anchor 21 can be a variety of different shapes and structure, such as can be direct rod shape structure etc..
And correspondingly, the edge of connection cloth 2 can be and sewn together with the inside for connect cloth 2 with inward curl, connection cloth 2 in this way
Edge can form lipostomous, be worn wherein for the rigid anchor 21 of direct rod shape.In this way when rigid anchor 21
When being moved under the pulling force of flexible connector, connection cloth 2 can also move, and be drawn as smooth extended configuration.In addition,
Rigid anchor 21 can also directly be sewn to the edge of connection cloth 2.Because connect cloth 2 can by rigid anchor 21 with
Flexible connector 4 realizes connection, thus rigid anchor can be relied on to carry active force, and the edge of connection cloth 2 can be made to be not easy
Tearing or damage occurs, and compared to being directly articulated on connection cloth, such as hole or ring, due to the quantity of flexible connector
Be it is limited, by rigid anchor can to the drawing force of limited a flexible connector in entire rigid anchor by the point of application
It is homogenized in its direction, such drawing force can be uniformly applied on connection cloth, to connect cloth for hard
The drawing force of screen board is also all throughout uniform, is more conducive to and realizes consistent planarization.
Optionally, in order to connect rigid anchor 21, flexible connector 4 generally can be to pull to spring, pull to spring
One end can be connected in the form of hanging etc. on rigid anchor 21, and the other end for pulling to spring is fixed on screen frame 3.
Specifically, pull to spring the one end being connect with rigid anchor 21 can be suspension hook or hanging ring shape, so as to rigidly fix
The hanging connection of part 21.In addition, flexible connector 4 can also be the common elastic connection knots of those skilled in the art such as rubber bodies
Structure, details are not described herein again.
Fig. 8 is a kind of structural schematic diagram of flexible connector in the projection screen that the embodiment of the present invention one provides.Such as Fig. 8 institutes
Show, further, for the ease of assembly, the side for pulling to spring is also provided with the stretch ring 41 hooked for foreign object.This
Sample operating personnel can be by the way that by hand, either other objects stretch into stretch ring 41 to load and unload or stretch to pulling to spring
Operation, consequently facilitating realizing the assembly or disassembly operation pulled between spring and rigid anchor 21 and screen frame 3.
Optionally, each rigid anchor 21 can be correspondingly connected with multiple flexible connectors 4.Such as rigid anchor 21
For straight-bar when, multiple flexible connectors can be connected on each straight-bar, and multiple flexible connectors are distributed on straight-bar
Different rod segments can effectively simplify the overall structure of projection screen in this way.
In addition, rigid anchor 21 can also connect one to one with flexible connector 4, this kind of connection type is usually applicable in
In rigid anchor 21 be the smaller structure of appearance and sizes such as close ring.
Flexible connector 4 needs enough tensile strengths when being fixed and stretching for screen board 1, to ensure to shield
Curtain plate 1 is effectively fixed, and has preferable flatness.Flexible connector 4 itself need to be selected cold with adaptive environment
The elastic material of thermal change, and adaptation change can be carried out according to the variation of environment temperature or power, it is bullet with flexible connector 4
Illustrated for spring, when screen board 1 is 80 inches of sizes, 1 weight of screen board be usually 5 kilograms (weight of connection cloth 2 compared with
Gently, it is convenient to omit), the number of active coils that can design spring in this way is 6 circles, and free height is 23mm or so；And when spring is to screen
When curtain plate 1 is fixed, spring can be stretched to 30mm, i.e. elongation is 7mm.
Since the area of screen board 1 is larger, so it is generally necessary to multiple flexible connectors 4 stretch jointly, screen could be allowed
Plate 1 and connection cloth 2 are effectively launched into formation state.Space set between flexible connector 4, and it is close with suitably arranging
Degree.So on the one hand enough indirect drawing forces can be provided screen board 1 using multiple flexible connectors 4, on the other hand,
Flexible connector 4 has suitable quantity, is also avoided that and causes the installation of projection screen tired when 4 quantity of flexible connector is excessive
It is difficult.In general, the spacing between adjacent spring connector is in 134mm or so, you can fixed to screen board 1 same realizing
When, ensure that screen board 1 has enough flatness.
Wherein, as a kind of optional arrangement mode of flexible connector 4, multiple flexible connectors 4 can be spaced setting
In the surrounding of screen board 1, for example respectively symmetrically direction is arranged at equal intervals.The four direction up and down of screen board 1 so can
By the pulling force effect of flexible connector 4, thus screen board 1 can be stretched effectively in all directions, be kept smooth
State.
And since screen board 1 itself is hard screen board, thus in vertical hanging setting, be easier to because of own wt reason
And naturally droop, and the phenomenon that 1 left and right sides meeting inward curl of screen board or outside, and 1 left and right sides of screen board
Generally it is not likely to produce crimp.Thus as another optional arrangement mode, multiple flexible connectors 4 can also be allowed to be spaced
It is arranged in the both sides up and down of screen board 1, in this way in entire screen width direction, the screen board 1 of hard all can be by upper and lower drawing
Stretch is equivalent to and has carried out reinforcing fixing to the direction on the both sides up and down of screen, upper and lower both sides have been fixed in width direction,
It prevents upper and lower both sides and inward curl occurs or opens outward because the fixed force being subject to is insufficient, and since screen board 1 is usually in water
Square upward width is more than the width on vertical direction, thus can also inhibit the crimp of the left and right sides simultaneously in this way.This
Sample can ensure that fixation and stretching of the flexible connector 4 to screen board, and 4 negligible amounts of flexible connector, installation are more convenient.
In addition, as another optional arrangement mode, the surrounding of screen board 1 is still both provided with flexible connector 4, and
It is less than the elastic connection positioned at the both sides up and down of screen board positioned at the density of setting of the flexible connector of the left and right sides of screen board 1
The density of setting of part.Flexible connector 4 is still looped around the surrounding of screen board 1 in this way, but the elasticity of about 4 both sides of screen board is even
Fitting setting is more intensive, and flexible connector setting in the left and right sides is more sparse, thus the drawing that about 1 both sides of screen board are subject to
Stretch the stress that active force is larger, can effectively antagonize 1 inward curl of screen board or open outward；And screen board 1 is because naturally drooping,
The stress that vertical direction curling occurs is very small, therefore it is smaller that the drawing force that the left and right sides is subject to is arranged.Arrangement is set in this way
The flexible connector 4 set still is able to apply all directions of screen board 1 in conjunction with the stretching demand of 1 different directions of screen board suitable
When drawing force, reach preferable and stretch and fixed effect is also brought centainly to installation due to the reduction of flexible connector quantity
It is convenient.
It should be noted that the arrangement mode of above-mentioned flexible connector, is not only suitable for connection cloth 2 and is located at the upper of screen board 1
The lower edge margin situation of fringe region and screen board is readily applicable to each side that connection cloth 2 is covered in entire screen board 1
Situation on edge.
For the ease of viewing, projection screen usually requires to be fixed on the vertical planes such as wall.As a kind of optional implementation
Mode, in order to realize that the fixation of projection screen, screen frame have the screen fixing groove for being connected with wall support part, screen
There is fixing groove downward notch, such screen frame wall support part or other solid can be connected to by screen fixing groove
Determine in structure, can specifically be mounted or be clamped using screen fixing groove.Fig. 9 is the another of the offer of the embodiment of the present invention one
A kind of partial structural diagram of screen frame.Figure 10 is the scheme of installation of screen frame in Fig. 9.Figure 11 is implementation of the present invention
A kind of structural schematic diagram for support element that example one provides.It is optional in order to realize the fixation of projection screen as shown in Fig. 3 to Figure 11
, screen frame 3 has screen fixing groove 32, it is possible to by support element 5 being arranged on wall using as wall support part,
Support element 5 has for being inserted into screen fixing groove 32 and supporting the articulated end 51 of screen frame 3, and 5 opposing sides of support element are perpendicular
Histogram has variable position upwards.The screen frame 3 of projection screen in this way can be articulated on support element 5, to realize projection
Screen 3 and being relatively fixed between the walls.
For projection screen, the fixed structure of the screen board also extension wall knot as entire projection screen simultaneously
Structure can simplify projection screen structure, be conducive to reduce the distance between projection screen plate and wall or thickness, meanwhile, it avoids
After the screen board of hard realizes smooth fixation, due to the error of processing or the installation of other connection structures, influence smooth
The state of fixed screen board.
Wherein, support element 5 can have a variety of different position regulative modes.In wherein a kind of optional mode, branch
Multiple vertically spaced mounting holes 52 can be provided in support member 5, mounting hole 52 is mounted on wall for selecting one
On.It in this way can be by wearing positioning bolt in mounting hole 52, to complete support element 5 and fixation between the walls.Work as positioning
When bolt is threaded through in different mounting holes 52, support element 5 will have different level altitudes relative to wall, to realize
The height of screen frame 3 adjusts.This kind of position regulative mode is fixed support element 5 it is not necessary that other fixed structures are arranged, institute
Can allow projection screen that there is more compact dimensioning and relatively thin thickness.
In order to support and mount screen frame, the ontology of support element 5 can also have a variety of different shapes or structure.Example
Such as, optionally, the articulated end 51 of support element 5 is the tongue piece of arc-shaped.At this point, arc-shaped tongue piece stretches into the screen of screen frame 3
After fixing groove 32, the arc-shaped sliding surface of tongue piece will not coincide with the cell wall shape of screen fixing groove 32, but holding point connects
Tactile or line contact relation.At this point, between the articulated end 51 and screen fixing groove 32 of support element 5 one can be generated along sliding surface
Fixed sliding, to keep more flexible relative position.Screen frame 3 in this way can be relatively easy to when by external force
It is moved left and right relative to support element 5 or certain rotation, consequently facilitating to position of the projection screen on wall and angle
It is adjusted.
In addition, in order to promote the exterior aesthetics of projection screen, optionally, the front of screen board 1 is additionally provided with for hiding
The front decoration frame (not shown) at the edge of lid connection cloth 2, front decoration frame and screen frame 3 connect.Front decoration frame in this way can
To be arranged on screen frame 3, and the exposed connection cloth 2 on the outside of 1 edge of screen board is covered, be avoided outside connection cloth
Dew, to allow the front outside of screen board 1 to be front decoration frame, effectively to promote the positive aesthetics of projection screen.In general,
Front decoration frame is similar with the structure of screen frame 3, is rectangular shaped rim structure.
Optionally, the surface of front decoration frame may be used the process of surface treatment such as plating, wire drawing or spray painting and be handled,
Further to promote its aesthetics.
Optionally, clamping, the connection of bonding or threaded fastener etc. may be used between front decoration frame and screen frame originally
The common connection type of field technology personnel.
In the present embodiment, projection screen specifically includes the screen board, soft connection cloth, the week for being disposed around screen board of hard
The screen frame of side and multiple flexible connectors；The front of screen board is projection light-receiving surface, and connection cloth is arranged in screen board
Edge, and part connection cloth is located at except the edge extent of screen board, the first end of each flexible connector with connect cloth
End connection outside screen board edge extent, second end are connect with screen frame, to be incited somebody to action by the pulling force of flexible connector
Connection cloth and screen board are stretched to formation state.Soft cloth and flexible connector can be utilized to realize screen board and screen frame in this way
Between fixation and positioning, while screen board can rely on flexible connector elasticity be in smooth extended configuration without generation
Deformation makes projected picture have higher quality；And the integral thickness of projection screen is relatively thin, structure is more compact.
Embodiment two
The embodiment of the present invention two also provides a kind of optical projection system.Optical projection system provided in this embodiment specifically includes projection
Projection screen in device and previous embodiment one, projection arrangement are used to project projected picture to the screen board of projection screen.Its
In, concrete structure, operation principle and the effect of projection screen have been described in detail in previous embodiment one, herein not
It repeats again.
Specifically, in the optical projection system of the present embodiment, projection arrangement can be existing all kinds of projecting apparatus, such as laser throwing
Shadow instrument etc..Projection arrangement can project projected picture to the screen board of projection screen, and such screen board can show projection
Picture, so that people watch.Wherein, the screen board in projection screen can maintain stretch-like under the pulling force effect of flexible connector
State, flatness is preferable, can effectively ensure that the image quality being projected on screen board.
Wherein, in the optical projection system of the present embodiment, projection screen may include the screen board of hard, soft connection cloth,
It is disposed around the screen frame of the side of screen board and multiple flexible connectors；The front of screen board is projection light-receiving surface, connection
Cloth is arranged at the edge of screen board, and connecting cloth, there is part edge to be located at except the edge extent of screen board, and each elasticity is even
The first end of fitting is connected with the edge being located at except screen board edge extent for connecting cloth, and second end connects with screen frame
It connects, formation state is stretched to so that cloth and screen board will be connected by the pulling force of flexible connector.
Optionally, the fitting of at least one of the front of cloth and screen board and the back side of screen board is connected.
Further, connection cloth can be bonded with the front of screen board and the back side of screen board, and with screen board
The width for the connection cloth that the width of the connection cloth of front fitting is less than and the back side of screen board is bonded.Cloth and screen board are connected in this way
Between connect more securely, be conducive to improve screen flatness.
Optionally, connection cloth is connected to the upper edge region of screen board and the lower edge margin of screen board.
Optionally, projection screen can also include protective cloth, protective cloth cover screen back with positive light area
Opposite region.Protective cloth can protect the back side of screen board, avoid extraneous dust impurity from being infected with, while playing interception.
Optionally, the marginal adhesion of cloth and screen board is connected.
Optionally, screen frame includes outer support portion, and outer support portion is supported on the back side at the edge of screen board, and outer
Except the edge extent that the edge of support portion is located at screen board, the edge for connecting cloth is extend out to behind the outside of outer support portion instead
To bending, to be connect with flexible connector behind the edge of package outer support portion.
Optionally, multiple flexible connectors are arranged at intervals on the both sides up and down of screen board；Alternatively, between multiple flexible connectors
Every the surrounding in screen board is arranged.
Optionally, screen frame has for the screen fixing groove that is connected with wall support part, screen fixing groove with to
Under notch, so as to be inserted into wall support part, and be fixed on metope.
In the present embodiment, optical projection system specifically includes projection arrangement and projection screen, and projection arrangement is used for projection screen
Screen board project projected picture；Wherein, projection screen specifically includes the screen board of hard, soft connection cloth, is disposed around screen
The screen frame and multiple flexible connectors of the side of curtain plate；The front of screen board is projection light-receiving surface, and connection cloth setting exists
The edge of screen board, and part connection cloth is located at except the edge extent of screen board, the first end of each flexible connector with
The end connection of cloth being located at except screen board edge extent is connected, second end is connect with screen frame, to pass through elastic connection
The pulling force of part will connect cloth and screen board is stretched to formation state.Soft cloth and flexible connector can be utilized to realize screen board in this way
Fixation between screen frame and positioning, while screen board can rely on the elasticity of flexible connector to be in smooth stretch-like
State makes projected picture have higher quality without being deformed；And the integral thickness of projection screen is relatively thin, structure is more tight
It gathers.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of projection screen, which is characterized in that the screen board including hard, is disposed around the screen board at soft connection cloth
Side screen frame and multiple flexible connectors；The front of the screen board is projection light-receiving surface, and the connection is laid
It sets at the edge of the screen board, and the part connection cloth is located at except the edge extent of the screen board, each bullet
Property connector the end that is located at the screen board edge extent outside of the first end with the connection cloth connect, second end and institute
Screen frame connection is stated, the connection cloth and the screen board are stretched to smooth shape by the pulling force of the flexible connector
State.
2. projection screen according to claim 1, which is characterized in that it is described connection cloth and the screen board front and/
Or the back side fitting of the screen board.
3. projection screen according to claim 2, which is characterized in that the front of connection cloth and the screen board and
The back side of the screen board is bonded, and is less than and the screen board with the width of the connection cloth of the front fitting of the screen board
The back side fitting connection cloth width.
4. according to claim 1-3 any one of them projection screens, which is characterized in that the connection cloth is connected to the screen
The lower edge margin of the upper edge region of plate and the screen board.
5. according to claim 1-3 any one of them projection screens, which is characterized in that further include protective cloth, the protective cloth
Cover the region opposite with positive light area of the screen back.
6. according to claim 1-3 any one of them projection screens, which is characterized in that the connection cloth and the screen board
Marginal adhesion.
7. according to claim 1-3 any one of them projection screens, which is characterized in that the screen frame includes outer support
Portion, the outer support portion is supported on the back side at the edge of the screen board, and the edge of the outer support portion is positioned at described
Except the edge extent of screen board, the edge for connecting cloth is reversely bent after extending out to the outside of the outer support portion, with
It is connect with the flexible connector behind the edge for wrapping up the outer support portion.
8. according to claim 1-3 any one of them projection screens, which is characterized in that multiple flexible connector intervals are set
It sets in the both sides up and down of the screen board；Alternatively, multiple flexible connectors are arranged at intervals on the surrounding of the screen board.
9. according to claim 1-3 any one of them projection screens, which is characterized in that the screen frame, which has, to be used for and wall
The screen fixing groove of body support element connection, the screen fixing groove have downward notch.
10. a kind of optical projection system, which is characterized in that including projection arrangement and claim 1-9 any one of them projection screens,
The projection arrangement is used to project projected picture to the screen board of the projection screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225934.3A CN108398850A (en) | 2018-03-19 | 2018-03-19 | Projection screen and optical projection system |
| PCT/CN2018/094512 WO2019178982A1 (en) | 2018-03-19 | 2018-07-04 | Projection screen and projection display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225934.3A CN108398850A (en) | 2018-03-19 | 2018-03-19 | Projection screen and optical projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108398850A true CN108398850A (en) | 2018-08-14 |
Family
ID=63092974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225934.3A Pending CN108398850A (en) | 2018-03-19 | 2018-03-19 | Projection screen and optical projection system |
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| Country | Link |
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| CN (1) | CN108398850A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020042961A1 (en) * | 2018-03-19 | 2020-03-05 | 青岛海信激光显示股份有限公司 | Projection screen and projection system |
| WO2022052866A1 (en) * | 2020-09-08 | 2022-03-17 | 深圳光峰科技股份有限公司 | Curtain fixing structure, mounting support, curtain device and projection display system |
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| CN101042522A (en) * | 2006-03-24 | 2007-09-26 | 索尼株式会社 | Rear projection display device and transmission screen |
| CN102597870A (en) * | 2009-06-12 | 2012-07-18 | 迪瑞波有限公司 | Tensioned projection screen assembly |
| CN202050490U (en) * | 2011-05-18 | 2011-11-23 | 浙江海盛科技股份有限公司 | Screen fixing device |
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| WO2020042961A1 (en) * | 2018-03-19 | 2020-03-05 | 青岛海信激光显示股份有限公司 | Projection screen and projection system |
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| WO2022052866A1 (en) * | 2020-09-08 | 2022-03-17 | 深圳光峰科技股份有限公司 | Curtain fixing structure, mounting support, curtain device and projection display system |
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