CN108549189A - A kind of orthographic projection optical screen and projection display system - Google Patents

A kind of orthographic projection optical screen and projection display system Download PDF

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Publication number
CN108549189A
CN108549189A CN201810687949.1A CN201810687949A CN108549189A CN 108549189 A CN108549189 A CN 108549189A CN 201810687949 A CN201810687949 A CN 201810687949A CN 108549189 A CN108549189 A CN 108549189A
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China
Prior art keywords
magnetic
orthographic projection
projection optical
optical screen
material layer
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CN201810687949.1A
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CN108549189B (en
Inventor
张益民
吴庆富
王祖熊
胡世加
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CHENGDU FSCREEN SCI-TECH Co Ltd
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CHENGDU FSCREEN SCI-TECH Co Ltd
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/54Accessories
    • G03B21/56Projection screens

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

The invention discloses a kind of orthographic projection optical screen and projection display systems, are related to the field of projection screen technology.Projection display system includes above-mentioned orthographic projection optical screen.Orthographic projection optical screen provided by the invention includes optical projection screen imaging function layer, ferroic material layer, soft magnetosphere, magnetic glue-line and the stiff baseplate being cascading, optical projection screen imaging function layer and ferroic material layer are made of flexible rollable material, magnetic glue-line includes multiple magnetic blob of viscoses mutually spliced, and stiff baseplate includes multiple bottom plate blocks mutually spliced.Orthographic projection optical screen packed and transported is convenient and at low cost, and without punching on the wall, will not destroy metope, installation, convenient disassembly.

Description

A kind of orthographic projection optical screen and projection display system
Technical field
The present invention relates to the fields of projection screen technology, aobvious in particular to a kind of orthographic projection optical screen and projection Show system.
Background technology
Growing with shadow casting technique, projector's image effect that optical diaphragm is presented of arranging in pairs or groups is more and more perfect, by To liking for more and more consumers for pursuing super large picture effect, however to reach exquisite picture and effect is presented, in addition to It needs except good projector, one piece of exquisite optical screen is more essential.It may be said that projector's technology increasingly Today of homogeneity, the quality of projection screen just directly determines the perfect degree of projected picture, by projector and optical projection The collocation of screen imaging functional layer is only a complete projection display system.
Optical projection screen imaging function layer is broadly divided into hard curtain and supporting part at present.Supporting part fixed form mainly uses bullet Spring, elastic string etc. have the object of stretching elasticity, so that curtain is formed a plane and are fixed on the frame of surrounding.Supporting part makes for a long time With will appear relaxation, fold etc., display effect is influenced, while the frame entirety of supporting part seems thick and heavy, it is ultra-thin with present OLED TV, narrow side trend be not inconsistent.The fixed form of hard curtain mainly uses glue, is pasted onto on rigid objects surface, then in rigidity Object surrounding assembly frame is for covering and decorating.Such hard curtain is installed and needs the pre- sunk screw on wall, metope is caused brokenly It is bad, while screen is very heavy, uses and dismantles and is all inconvenient.
Optical projection screen imaging function layer on sale currently on the market, be all supported with thick and heavy rigid back, then It is aided with hard curtain made of the accessories such as Decorative frame, pendant, by taking 100 inch optical projection screen imaging function layers packaging as an example, The size of packing case has reached 2390*1430*90mm, and the national standard size of common house I class man lifts is as follows: 900kg-1000kg load-carrying sizes are:The following size of 900*2100mm, 900kg load-carrying is:800*2100mm, 1150kg load-carrying ruler It is very little to be:1000*2100mm.The product packaging volume of this hard screen form is excessive, has exceeded the size of man lift, to entering upstairs The serious inconvenience of family band, while hard curtain weight containing packing case reaches 60kg or so, needs 3~4 talents to carry, it is non-to install upstairs It is often difficult, the apparent disadvantage such as other also of high cost, waste materials, not energy-efficient environmental protection.
Invention content
The purpose of the present invention is to provide a kind of orthographic projection optical screen and projection display system, packed and transported it is convenient and It is at low cost, and without punching on the wall, metope, installation, convenient disassembly will not be destroyed.
The present invention provides the first technical solution:
A kind of orthographic projection optical screen includes optical projection screen imaging function layer, the ferroic material being cascading Layer, soft magnetosphere, magnetic glue-line and stiff baseplate, the optical projection screen imaging function layer and the ferroic material layer are using flexible Rollable material is made, and the magnetic glue-line includes multiple magnetic blob of viscoses mutually spliced, and the stiff baseplate includes multiple mutual spellings The bottom plate block connect.
Further, the ferroic material layer includes flexible material layer and coated in the iron powder on the flexible material layer Film layer.
Further, the ferroic material layer is galvanized sheet iron, and the thickness of the galvanized sheet iron is less than or equal to 2mm.
Further, multiple magnetic blob of viscoses are arranged along first direction, and the soft magnetosphere is along first direction successively magnetic suction Invest multiple magnetic blob of viscoses.
Further, the stiff baseplate is any one of honeycomb aluminum plate, aluminium-plastic panel, PVC foam plate, plank.
Further, the shape of the bottom plate block is rectangular, triangle or trapezoidal.
Further, the splicing gap between the magnetic blob of viscose is less than 10mm.
Further, the ferroic material layer is attached to the light using double faced adhesive tape, adhesive sticker, optic-solidified adhesive or melt viscosity Learn the back side of projection screen imaging function layer.
Further, the magnetic glue-line is pasted onto by double faced adhesive tape, foam rubber or adhesive sticker on the stiff baseplate.
The present invention provides second of technical solution:
A kind of projection display system includes the orthographic projection optical screen described in projector and the first technical solution.
The advantageous effect of orthographic projection optical screen and projection display system provided by the invention is:
1. orthographic projection optical screen include the optical projection screen imaging function layer being cascading, ferroic material layer, Soft magnetosphere, magnetic glue-line and stiff baseplate, the principle inhaled using magnetic and iron phase need not punch installation screw, no on metope Metope can be destroyed, installation, dismounting are simpler.
2. optical projection screen imaging function layer and ferroic material layer are made of flexible rollable material, magnetic glue-line includes Multiple magnetic blob of viscoses mutually spliced, stiff baseplate includes multiple bottom plate blocks mutually spliced, during packed and transported, can be incited somebody to action Optical projection screen imaging function layer and the curling of ferroic material layer, split into multiple fritters by magnetic glue-line and stiff baseplate, pack Convenient transportation and at low cost.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair The restriction of range.It for those of ordinary skill in the art, without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the orthographic projection optical screen that the embodiment of the present invention provides.
Fig. 2 is the decomposition texture schematic diagram for the orthographic projection optical screen that the embodiment of the present invention provides.
Icon:10- orthographic projection optical screens;11- optical projection screen imaging function layers;12- ferroic material layers;13- is soft Magnetosphere;14- magnetic glue-lines;15- stiff baseplates;16- frames.
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.Obviously, described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects It encloses.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it is to be understood that, the instructions such as term "upper", "lower", "inner", "outside", "left", "right" Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put Orientation or positional relationship or the orientation or positional relationship that usually understands of those skilled in the art, be merely for convenience of retouching It states the present invention and simplifies description, do not indicate or imply the indicated equipment or element must have a particular orientation, with specific Azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, " setting ", " even Connect " etc. terms shall be understood in a broad sense, for example, " connection " may be a fixed connection, may be a detachable connection, or integrally connect It connects;It can be mechanical connection, can also be electrical connection;Can be directly connected to, can also be indirectly connected with by intermediary, it can To be the connection inside two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned The concrete meaning of term in the present invention.
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail.
It please refers to Fig.1 and Fig. 2, present embodiments provides a kind of orthographic projection optical screen 10, orthographic projection optical screen 10 wraps Include the optical projection screen imaging function layer 11 being cascading, ferroic material layer 12, soft magnetosphere 13, magnetic glue-line 14, rigidity Bottom plate 15 and frame 16, optical projection screen imaging function layer 11 and ferroic material layer 12 are made of flexible rollable material, Magnetic glue-line 14 includes multiple magnetic blob of viscoses mutually spliced, and stiff baseplate 15 includes multiple bottom plate blocks mutually spliced.
Optical projection screen imaging function layer 11 is made of a series of fine optical textures, can make projector light by force and Environmental light intensity redistributes in screen construction, can effectively cover ambient light and enhance the light intensity of projector, be promoted Picture contrast, luminance gain, color reducibility, respectively rate etc., meet the needs of people are to superelevation image quality.Optical projection screen Imaging function layer 11 is made of flexible rollable material, and optical projection screen imaging function layer 11 can compared to hard screen after crimping The packing case size and weight for effectively reducing 60% convenient for packed and transported and reduce cost.
The back side of optical projection screen imaging function layer 11 is provided with the ferroic material layer 12 of black.Ferroic material layer 12 is adopted The back side of optical projection screen imaging function layer 11 is attached to double faced adhesive tape, adhesive sticker, optic-solidified adhesive or melt viscosity.Ferroic material Layer 12 can be not only used for adsorbing with magnetic glue-line 14, can also be used as the protective layer of optical projection screen imaging function layer 11.
Ferroic material layer 12 is including flexible material layer and coated in the iron powder film layer on flexible material layer, or can make The surface of iron powder film layer is adsorbed on any other polar magnetic product, not having to the stringent polarity for distinguishing magnetic product can be square Just it uses, and magnetic and adsorption capacity will not too long decline because of the time.In this way, the magnetism of ferroic material layer 12 be more than or Equal to 3g/cm2, thickness is less than or equal to 2mm.
In addition, ferroic material layer 12 can also use galvanized sheet iron, the thickness of galvanized sheet iron to be less than or equal to 2mm, have Very strong magnetic performance, it is light-weight, it is rollable, and also certain metal rigidity.
The size of optical projection screen imaging function layer 11 is very big, for example, one 100 inches of optical projection screen at As the size of functional layer 11 has just reached 2214*1245mm, if the magnetic glue-line 14 using a monoblock is pasted onto stiff baseplate 15 On, then the size of magnetic glue-line 14 also at least needs to reach 2214*1245mm, and the weight of so large-sized magnetic glue-line 14 can reach 7.5kg, area reach 2.76m2, magnetic glue-line 14 pastes, contraposition, and the control of position deviation is all extremely difficult.Therefore, this implementation In example, magnetic glue-line 14 includes multiple magnetic blob of viscoses mutually spliced, that is, uses the magnetic blob of viscose of small size to be spliced into large-sized magnetic glue Layer 14 makes the stickup of magnetic glue-line 14, contraposition, deviation control become simple, can effectively promote installation effectiveness.
Magnetic blob of viscose is made of flexible rollable material, and the shape of magnetic blob of viscose is rectangular, triangle or trapezoidal etc., preferably magnetic The shape of blob of viscose is symmetrical regular shape, and the personnel that are easily installed are spliced on stiff baseplate 15 pastes magnetic glue-line 14.Magnetic glue-line 14 are pasted onto by double faced adhesive tape, foam rubber or adhesive sticker on stiff baseplate 15.The size needs of monolithic magnetic blob of viscose are thrown according to optics The size and splicing block number of shadow screen imaging functional layer 11 calculate, for example, one piece 97 inches of optical projection screen imaging The size of functional layer 11 is long 2147mm, wide 1208mm, it is assumed that is spliced vertically using three pieces of magnetic blob of viscoses, then the length of every piece of magnetic blob of viscose It is 1208mm to spend, the width 715.7mm of every piece of magnetic blob of viscose, and the splicing gap between magnetic blob of viscose is less than 10mm.
After the splicing installation of magnetic blob of viscose, there is splicing gap between magnetic blob of viscose, these gaps are not processed, inevitable also to show On optical projection screen imaging function layer 11, causes projected image flexural deformation, the problems such as light and shade is uneven, influence to watch.This In embodiment, by the magnetic soft magnetosphere 13 of the adsorption last layer of the magnetic glue-line 14 in splicing, during soft magnetosphere 13 is used as Interbed can effectively overcome the rough defect of metope, more smooth after so that optical projection screen imaging function layer 11 is installed, Improve display effect.Using the flexible nature of of soft magnetosphere 13 itself, the splicing gap of magnetic glue-line 14 is covered, is eliminated, to solve Certainly the piece of magnetic glue-line 14 influences the problem of image quality.In addition, soft magnetosphere 13 itself is also a kind of permanent-magnet material, can further increase The magnetic force of strong magnetic glue-line 14 makes the optical projection screen imaging function layer 11 for being provided with ferroic material layer 12 adsorb more firm Gu.
Soft magnetosphere 13 is made of flexible rollable material, size and the optical projection screen imaging function layer of soft magnetosphere 13 11 size is consistent, and soft magnetosphere 13 is one block of complete sheet material.Soft magnetosphere 13 be located at optical projection screen imaging function layer 11 with Between magnetic glue-line 14, one layer of buffer layer is formed, the piece for eliminating the splicing of magnetic glue-line 14, improving optical projection screen is imaged work( The planarization that ergosphere 11 is installed.
Influence of the metope out-of-flatness to screen image quality is eliminated, orthographic projection optical screen 10 is additionally provided with stiff baseplate 15.Light The size for learning projection screen imaging function layer 11 is very big, if using the stiff baseplate 15 of a monoblock, monoblock stiff baseplate 15 Stickup, contraposition, the control of position deviation, it is all extremely difficult.Therefore, in the present embodiment, stiff baseplate 15 includes multiple mutual The bottom plate block of splicing uses the bottom plate block of small size to be spliced into large-sized stiff baseplate 15, stiff baseplate 15 is made to paste, is right Position, deviation control become simple, can effectively promote installation effectiveness.
Stiff baseplate 15 is any one of honeycomb aluminum plate, aluminium-plastic panel, PVC foam plate, plank.The shape of bottom plate block is side Shape, triangle or trapezoidal, it is preferable that the shape of bottom plate block is symmetrical regular shape, and the personnel that are easily installed are spliced viscous on metope Patch.The size of monolithic bottom plate block needs to be calculated according to the size and splicing block number of optical projection screen imaging function layer 11, citing Illustrate, one piece 97 inches of 11 size of optical projection screen imaging function layer is long 2147mm, wide 1208mm, it is assumed that use three pieces Bottom plate block splices vertically, then the length of every piece of bottom plate block is 1208mm, the width 715.7mm of every piece of bottom plate block, every two pieces of bottom plates The piece that block pastes splicing is less than or equal to 10mm.
The installation process of orthographic projection optical screen 10:First, the fixed upper rigidity on the metope of projection screen installation site Bottom plate 15.Secondly, upper magnetic glue-line 14 is pasted in alignment on stiff baseplate 15.Then, the alignment of soft magnetosphere 13 is adsorbed on magnetic glue-line On 14.Then, the optical projection screen imaging function layer 11 for being provided with ferroic material layer 12 is aligned soft magnetosphere 13, and be adsorbed on On soft magnetosphere 13.Finally, upper side frame 16 is installed on four sides of optical projection screen imaging function layer 11.
Frame 16 can be that ferrous material makes, and be adsorbed on magnetic glue-line 14, can also other metal materials or plastics system Make, by sticking double faced adhesive tape on magnetic glue-line 14 or metope.Frame 16 is for beautifying optical projection screen imaging function layer 11 Appearance and four sides for blocking optical projection screen imaging function layer 11, prevent screen directly by external impacts and with magnetic glue-line 14 Separation.Frame 16 is ultra-narrow frame design, and rib width is less than or equal to 20mm.
Wherein, multiple magnetic blob of viscoses are arranged along first direction, and soft magnetosphere 13 is along first direction successively magnetic absorption in multiple magnetic Blob of viscose.The installation direction of soft magnetosphere 13 is with the installation direction of magnetic glue-line 14 mainly according to the attracting original of magnetic material magnetic pole abnormity Reason, is matched with soft magnetosphere 13 and magnetic glue-line 14, realizes that magnetic attraction maximizes.The alignment of soft magnetosphere 13 is adsorbed on magnetic glue-line 14 After surface, need to be scraped the air for the position for generating air bubble with plastic spatula.
During magnetic glue-line 14 is pasted with stiff baseplate 15, need using plastic spatula along the side that magnetic glue-line 14 is installed To air is scraped, ensures that magnetic glue-line 14 is bonded completely with stiff baseplate 15, prevents from forming air bubble.Also, magnetic glue-line 14 with Stiff baseplate 15 is pasted, and needs first to paste one piece of magnetic blob of viscose among stiff baseplate 15, the magnetic that other magnetic blob of viscoses are pasted with centre On the basis of blob of viscose, paste around.
The present embodiment also provides a kind of projection display system, and projection display system includes projector and orthographic projection optical screen 10, projector is used for 10 projected picture of orthographic projection optical screen.
The advantageous effect of orthographic projection optical screen 10 and projection display system provided in this embodiment:
1. orthographic projection optical screen 10 includes optical projection screen imaging function layer 11, the ferroic material being cascading Layer 12, soft magnetosphere 13, magnetic glue-line 14 and stiff baseplate 15, the principle inhaled using magnetic and iron phase, need not punch peace on metope Screw is filled, metope will not be destroyed, installation, dismounting are simpler.
2. optical projection screen imaging function layer 11 and ferroic material layer 12 are made of flexible rollable material, magnetic glue-line 14 include multiple magnetic blob of viscoses mutually spliced, and stiff baseplate 15 includes multiple bottom plate blocks mutually spliced, in packed and transported process In, optical projection screen imaging function layer 11 and ferroic material layer 12 can be crimped, magnetic glue-line 14 and stiff baseplate 15 are torn open It is divided into multiple fritters, packed and transported is convenient and at low cost.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of orthographic projection optical screen, which is characterized in that the orthographic projection optical screen includes the optics being cascading Projection screen imaging function layer (11), ferroic material layer (12), soft magnetosphere (13), magnetic glue-line (14) and stiff baseplate (15), institute It states optical projection screen imaging function layer (11) and the ferroic material layer (12) to be made of flexible rollable material, the magnetic Glue-line (14) includes multiple magnetic blob of viscoses mutually spliced, and the stiff baseplate (15) includes multiple bottom plate blocks mutually spliced.
2. orthographic projection optical screen according to claim 1, which is characterized in that the ferroic material layer (12) includes flexibility Material layers and coated in the iron powder film layer on the flexible material layer.
3. orthographic projection optical screen according to claim 1, which is characterized in that the ferroic material layer (12) is galvanized iron The thickness of piece, the galvanized sheet iron is less than or equal to 2mm.
4. orthographic projection optical screen according to claim 1, which is characterized in that multiple magnetic blob of viscoses are arranged along first direction Row, the soft magnetosphere (13) is along first direction successively magnetic absorption in multiple magnetic blob of viscoses.
5. orthographic projection optical screen according to claim 1, which is characterized in that the stiff baseplate (15) is honeycomb aluminum Any one of plate, aluminium-plastic panel, PVC foam plate, plank.
6. orthographic projection optical screen according to claim 1, which is characterized in that the shape of the bottom plate block be it is rectangular, three It is angular or trapezoidal.
7. orthographic projection optical screen according to claim 1, which is characterized in that the splicing gap between the magnetic blob of viscose is small In 10mm.
8. orthographic projection optical screen according to claim 1, which is characterized in that the ferroic material layer (12) is using two-sided Glue, adhesive sticker, optic-solidified adhesive or melt viscosity are attached to the back side of the optical projection screen imaging function layer (11).
9. orthographic projection optical screen according to claim 1, which is characterized in that the magnetic glue-line (14) by double faced adhesive tape, Foam rubber or adhesive sticker are pasted onto on the stiff baseplate (15).
10. a kind of projection display system, including projector, which is characterized in that just including claim 1 to 9 any one of them Projection optics screen.
CN201810687949.1A 2018-06-28 2018-06-28 Orthographic projection optical screen and projection display system Active CN108549189B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2243986Y (en) * 1995-09-28 1997-01-01 赵亚军 Multifunctional blackboard
JP2008058786A (en) * 2006-09-01 2008-03-13 Miraial Kk Projection screen
JP3158150U (en) * 2009-12-29 2010-03-18 株式会社マグエックス Magnet display sheet
CN202873269U (en) * 2012-11-16 2013-04-10 江苏元京电子科技有限公司 Ferrite screen
JP2014128917A (en) * 2012-12-28 2014-07-10 Nichirei Magnet Kk Repair method of deteriorated writing plate and magnetic organic high polymer joint material used therefor
CN106004173A (en) * 2016-08-01 2016-10-12 万象设计江苏有限责任公司 Double-layer blackboard
CN206059071U (en) * 2016-09-23 2017-03-29 修森经贸发展(上海)有限公司 A kind of Split type magnetic bottom system
CN106836708A (en) * 2017-03-18 2017-06-13 清远市快地新型建材有限公司 A kind of magnetic-type plate construction
CN106842797A (en) * 2017-04-25 2017-06-13 青岛海信电器股份有限公司 A kind of laser projection screen
CN107544203A (en) * 2017-09-30 2018-01-05 青岛海信电器股份有限公司 Projection display screen and projection display system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2243986Y (en) * 1995-09-28 1997-01-01 赵亚军 Multifunctional blackboard
JP2008058786A (en) * 2006-09-01 2008-03-13 Miraial Kk Projection screen
JP3158150U (en) * 2009-12-29 2010-03-18 株式会社マグエックス Magnet display sheet
CN202873269U (en) * 2012-11-16 2013-04-10 江苏元京电子科技有限公司 Ferrite screen
JP2014128917A (en) * 2012-12-28 2014-07-10 Nichirei Magnet Kk Repair method of deteriorated writing plate and magnetic organic high polymer joint material used therefor
CN106004173A (en) * 2016-08-01 2016-10-12 万象设计江苏有限责任公司 Double-layer blackboard
CN206059071U (en) * 2016-09-23 2017-03-29 修森经贸发展(上海)有限公司 A kind of Split type magnetic bottom system
CN106836708A (en) * 2017-03-18 2017-06-13 清远市快地新型建材有限公司 A kind of magnetic-type plate construction
CN106842797A (en) * 2017-04-25 2017-06-13 青岛海信电器股份有限公司 A kind of laser projection screen
CN107544203A (en) * 2017-09-30 2018-01-05 青岛海信电器股份有限公司 Projection display screen and projection display system

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