CN108628082B - Flexible optical projection screen that can curl - Google Patents
Flexible optical projection screen that can curl Download PDFInfo
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- CN108628082B CN108628082B CN201810295294.3A CN201810295294A CN108628082B CN 108628082 B CN108628082 B CN 108628082B CN 201810295294 A CN201810295294 A CN 201810295294A CN 108628082 B CN108628082 B CN 108628082B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/602—Lenticular screens
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- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention discloses a flexible rollable optical projection screen, which comprises a rollable flexible membrane, an elastic element and a metal frame, wherein the flexible membrane is arranged on the flexible membrane; the metal frame comprises a square inner frame and an outer frame, the outer frame is completely suspended on the periphery of the inner frame, and the inner frame is connected with the outer frame through screws; four side edges of the back surface of the inner frame, which are close to the edge of the inner frame, are respectively provided with an inward-bent groove; a layer of substrate material is adhered to the back of the flexible membrane; the edge of the substrate material passes through a gap between the inner frame and the outer frame and is connected with the elastic element through the hook; the other end of the elastic element is hooked in the groove through the hook. The invention adopts the structure that the inner frame is matched with the outer frame, and the outer frame is completely suspended at the periphery of the inner frame, thereby ensuring that a certain gap exists between the inner frame and the outer frame, facilitating the substrate material to freely stretch and slide between the outer frame and the inner frame when the temperature changes and expands with heat and contracts with cold, and offsetting the deformation of the stretching or shortening change by the deformation of the elastic element, so that the screen is always in a tensioning state.
Description
Technical Field
The invention belongs to the field of electronic display and relates to a projection display branch, in particular to a flexible and rollable optical projection screen.
Background
With the continuous improvement of the living standard of people, the demand on the size of a projection display screen is higher and higher. However, the conventional liquid crystal display, the OLED display or the QLED display which is being developed at present, has the problem of too great technical difficulty or too high price in the aspect of large size, and the demand of the general public is greatly limited. With the development of optical projection display technology, optical projection display has a display effect comparable to that of liquid crystal display, and the cost of optical projection display is lower in large-size display, so that the optical projection display is favored by various white-light enterprises.
Laser projection televisions, also known as laser televisions, laser cinemas, and the like, are comprised of an ultra-short-focus laser projector and a projection screen, and generally employ a projection optical screen in order to achieve good performance. On one hand, the projection optical screen has the characteristics of high gain and high ambient light resistance in terms of performance, and the brightness, the color saturation and the contrast of image display are greatly improved. On the other hand, the nature of the projection optical screen is a large-size precision optical component, which is composed of a single-layer or multi-layer optical film and plate. In addition to the large dimension in the length-width direction, the thickness dimension is also in the order of millimeters. Failure to curl or difficulty in curling, or damage after curling. In order to ensure the smoothness and the aesthetic property of the screen when in use, the optical screen is generally fixed on a substrate, such as an aluminum-plastic composite plate and an aluminum honeycomb plate, to embody a thick plate-shaped form, which is called as a hard screen. The product in the form brings great difficulty to packaging, transportation, upstairs going and installation, and meanwhile, the product is high in cost, wastes materials, and is not energy-saving and environment-friendly.
Due to the development of urbanization in modern society, more and more people live in high-rise buildings, and elevators for carrying people are generally not provided with large-size objects, so that the large-size optical projection hard screen is very difficult to enter families. The large-size optical projection screen made of the flexible material can reduce the size and the weight to one tenth of those of a hard screen with the same display size in a curling mode, and well solves the problems that the large-size optical projection hard screen is too large in packaging volume, too heavy, high in transportation cost and difficult to transport to home.
The patent application No. CN201410319325.6 discloses a frameless frame curtain, which is characterized in that a frame is constructed, and the curtain is tensioned and stretched on the frame, which is the method for using the current common projection curtain. Such as white plastic screens, bead screens, metal screens, etc. However, the curtain needs to be covered on the front surface of the rectangular main body structure, and the edge of the curtain is folded to the back surface of the rectangular main body structure and fixedly connected with the back surface of the frame, so that the curtain is inconvenient to use and is easy to damage.
The invention patent application with application number CN201611015719.8 discloses a flexible ultra-short focus projection optical film and a screen thereof, which focuses on that the screen is made of a rollable material. Although the problems of screen size and transportation are solved, the scheme is that the optical film is directly fixed on the rectangular frame in the using process, and when the environment changes or the optical film deforms, the optical screen needs to be adjusted manually to be flat, so that the use is very inconvenient.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a flexible rollable optical projection screen which adopts a special structure that an inner frame is matched with an outer frame, and the outer frame is completely suspended on the inner frame, so that a tensioned substrate material can freely stretch and slide between the outer frame and the inner frame when the temperature changes and expands with heat and contracts with cold, and better smoothness of the flexible rollable optical projection screen is ensured.
The purpose of the invention is realized by the following technical scheme: a flexible rollable optical projection screen comprising a rollable flexible membrane, a resilient element and a metal frame;
the metal frame comprises a square inner frame and an outer frame, the outer frame is completely suspended on the periphery of the inner frame, the inner frame is not in contact with the outer frame, and the inner frame is connected with the outer frame through screws; four side edges of the back surface of the inner frame, which are close to the edge of the inner frame, are respectively provided with an inward-bent groove;
a layer of substrate material is adhered to the back of the flexible diaphragm, and the size of the substrate material is larger than that of the flexible diaphragm; the edge of the substrate material passes through a gap between the inner frame and the outer frame and is connected with the elastic element through the hook; the other end of the elastic element is hooked in the groove through the hook.
Furthermore, an insulating sleeve is sleeved on the screw for connecting the inner frame and the outer frame. The substrate material is provided with an opening through which the screw passes, and the size of the opening is larger than that of the screw.
Further, the flexible membrane consists of an optical film layer coated with a plurality of layers of micro optical structures, and sequentially comprises a hardening layer, a first PET base film layer, a color layer, a second PET base film layer, an optical structure layer and a metal reflection layer, wherein the optical structure layer comprises a Fresnel structure, a linear grating structure or a brightness enhancement film structure; the thickness of the flexible membrane is less than 2 mm.
The metal reflecting layer is made of high-reflection materials and coated on the optical structure layer through a spraying, printing or electroplating process; metal reverseThe method for calculating the gain of the central point of the flexible membrane comprises the following steps that the gain of the central point of the flexible membrane is required to be greater than 0.8 in the emitting layer: in a dark room, to a flexible film) and then separately test the brightness L at the center point of the screen5Illuminance l of the harmony light machine5And calculating the gain: gain ═ L5*π/l5。
Further, the substrate material is adhered to the metal reflecting layer through adhesive sticker, AB glue, light curing glue or EVA hot melt glue, and is used for protecting the metal reflecting layer and supporting and flattening the flexible membrane;
the substrate material is required to meet the requirement that the substrate material is subjected to a horizontal tension force of 1.8X10 per square millimeter-4In the case of N, the amount of deformation is less than or equal to 0.01 mm;
the substrate material comprises a fibrous material, PET or TPU: when the fiber material is selected, the warp threads of the fiber material are parallel to the long edge of the flexible membrane, and the weft threads of the fiber material are parallel to the short edge of the flexible membrane; when a PET or TPU material is selected, the elastic modulus of the PET or TPU is required to be more than or equal to 3.0 Gpa;
the thickness h of the substrate material satisfies 0 < h < 0.25 mm.
Furthermore, the inner frame and the outer frame need to meet the requirements that under the pressure of 380N, the bending deformation amount of the material is less than or equal to 0.24 mm, and the yield strength of the material is greater than or equal to 100 MPa.
The cross section of the inner frame is in a right-angle inverted trapezoid shape, the inclined waist of the right-angle inverted trapezoid is not less than 1 degree and not more than 3 degrees with the inclination angle a in the vertical direction, and the inclined waist of the right-angle inverted trapezoid is positioned on one side adjacent to the flexible membrane.
The size of the inner frame is larger than that of the flexible diaphragm, and the difference between the sizes of the inner frame and the flexible diaphragm is equal to 4 times of the thickness of the flexible diaphragm.
Further, the elastic modulus of the elastic element is greater than or equal to 0.9 Gpa.
The invention has the beneficial effects that:
1. the special structure that the inner frame is matched with the outer frame, the outer frame is completely suspended on the inner frame, and the inner frame is connected through the screws ensures that a certain gap exists between the inner frame and the outer frame, so that the tensioned substrate material can freely stretch and slide between the outer frame and the inner frame when the temperature changes and expands with heat and contracts with cold, and the deformation of the corresponding size extension or shortening change is counteracted by the deformation of the elastic element, so that the screen is always in a tensioned state, the better smoothness of the flexible and rollable optical projection screen is ensured, and the service life of the fiber substrate material on the back of the flexible membrane is greatly prolonged;
2. the flexible rollable optical projection screen well solves the problems of overlarge packaging volume, heavy transportation cost and difficulty in carrying to the home of a large-size optical projection hard screen, achieves ultrahigh smoothness of assembly of the flexible rollable optical projection screen, and greatly prolongs the service life of the flexible rollable optical projection screen.
Drawings
FIG. 1 is a schematic diagram of a rear structure of an optical projection screen according to the present invention;
FIG. 2 is a schematic side view of an optical projection screen according to the present invention;
FIG. 3 is a schematic view of a flexible membrane structure according to the present invention;
FIG. 4 is a schematic view of the inner frame connection of the present invention;
description of reference numerals: 1-flexible membrane, 2-elastic element, 3-metal frame, 31-inner frame, 32-outer frame, 33-groove, 4-substrate material, 5-screw.
Detailed Description
The invention discloses a flexible and rollable optical projection screen, which aims to solve the problems of overlarge packaging volume, heavy weight, high transportation cost and difficult carrying and entry to the home of a large-size optical projection hard screen, and the technical difficulties to be actually solved for solving the problems are as follows: 1. the large-size optical projection screen is convenient to curl, and the performance of the screen cannot be changed after the curling; 2. the large-size optical projection screen can be flattened after being curled, so that the flattening smoothness is very good; 3. durability of a large-size optical projection screen, for example, problems of frame deformation, glue line cracking and the like in the use of the screen need to be solved; 4. large-sized optical projection screens are convenient to produce and transport.
The core of the invention is that a layer of fiber substrate material is adhered to the whole back surface of the flexible film coated with the fine optical structure, the fiber substrate material plays a role of protecting the metal coating on the back surface of the flexible rollable optical projection screen on one hand, and on the other hand, the fiber substrate material also plays a role of supporting and flattening the flexible rollable optical projection screen when a user assembles the flexible rollable optical projection screen. Meanwhile, the frame structure of the flexible rollable optical projection screen adopts a special structure form that the inner frame is matched with the outer frame, the special structure form is that the outer frame completely suspends on the inner frame, the outer frame is connected with the inner frame through screws, a certain gap is ensured to exist between the inner frame and the outer frame, when the temperature changes, namely expands with heat and contracts with cold, the flexible substrate material convenient for tensioning can freely stretch and slide between the outer frame and the inner frame, the deformation of the corresponding size extension or shortening change is offset by the deformation of the elastic element, the screen is always in a tensioning state, the better smoothness of the flexible screen is ensured, and the service life of the fiber material on the back of the flexible membrane is greatly prolonged.
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1 and 2, a flexible rollable optical projection screen is characterized by comprising a rollable flexible membrane 1, an elastic member 2 and a metal frame 3;
the metal frame 3 comprises a square inner frame 31 and an outer frame 32, the outer frame 32 completely suspends on the periphery of the inner frame 31, the inner frame 31 is not in contact with the outer frame 32, and the inner frame 31 is connected with the outer frame 32 through a screw 5; four sides of the back of the inner frame 31 close to the edge of the inner frame are respectively provided with an inward bending groove 33;
a layer of substrate material 4 is adhered to the back surface of the flexible membrane 1, and the size of the substrate material 4 is larger than that of the flexible membrane 1; the edge of the backing material 4 passes through the gap between the inner frame 31 and the outer frame 32 and is connected with the elastic element 2 through a hook; the other end of the elastic element 2 is hooked in the groove 33 through a hook.
The screws connecting the inner frame 31 and the outer frame 32 are sleeved with insulating sleeves to ensure that the outer frame completely floats on the inner frame, but other isolating materials or structural forms can be used to obtain a structural form that the outer frame does not directly contact the inner frame.
The substrate material 4 is provided with an opening through which the screw passes, and the size of the opening is larger than that of the screw (after the screw is sleeved with the insulating sleeve), so that the substrate material 4 is not contacted with the plastic insulating sleeve, the substrate material 4 can freely stretch and contract, and the internal stress is released.
The special structure that the inner frame is not in contact with the outer frame can ensure that a certain gap exists between the inner frame and the outer frame, so that the tensioned substrate material can freely stretch and slide between the outer frame and the inner frame when the temperature changes and expands with heat and contracts with cold, and the deformation of the corresponding size extension or shortening change is offset by the deformation of the elastic element, so that the screen is always in a tensioned state, the better smoothness of the flexible screen is ensured, and the service life of the flexible membrane and the substrate material on the back of the flexible membrane is greatly prolonged.
As shown in fig. 3, the flexible film 1 of the present invention is composed of an optical film layer coated with a plurality of layers of micro optical structures, and sequentially includes a hardened layer, a first PET base film layer, a color layer, a second PET base film layer, an optical structure layer and a metal reflection layer, wherein the optical structure layer includes a fresnel structure, a linear grating structure or a brightness enhancement film structure, and other optical structure forms, but the screen film formed by various structures is required to be flexible and rollable; the thickness of the flexible membrane 1 is less than 2 mm. When the rolling diameter of the curled screen is more than or equal to 210mm, the maximum bending deformation amount is less than or equal to 2mm, so that the screen can be effectively flattened, but the rolling diameter cannot exceed 400mm for production and transportation.
The metal reflecting layer is made of high-reflection materials (including high-reflection materials such as aluminum, gold or silver) and coated on the optical structure layer through a spraying, printing or electroplating processing technology; the gain of the central point of the flexible membrane 1 needs to be ensured to be larger than 0.8 by the metal reflecting layer, and the calculation method of the gain comprises the following steps: under the dark room condition, a standard white field picture is projected to the flexible membrane 1, and then the brightness L at the central point of the screen is respectively tested5(unit: cd/m)2) Illuminance l of the harmony light machine5(unit: lx), calculate gain: gain ═ L5*π/l5。
Further, the substrate material 4 is adhered to the metal reflecting layer through adhesive sticker, AB glue, light curing glue or EVA hot melt glue; for protecting the metallic reflective layer, and on the other hand for supporting and flattening the flexible membrane 1 when assembling the flexible rollable optical projection screen; when the screen is pasted, the whole surface of the screen is required to be pasted without defects such as wrinkles, bubbles and impurities so as to ensure the durability of the screen.
The backing material 4 is required to be subjected to a tensile force of 1.8X10 per square millimeter in the horizontal direction-4In the case of N, the amount of deformation is less than or equal to 0.01 mm, which facilitates the curling and flattening of the flexible membrane 2;
the backing material 4 may be any material that is flexible, mainly comprising fibrous material, PET or TPU: when the fiber material is selected, the warp threads of the fiber material are parallel to the long edge of the flexible membrane 1, and the weft threads of the fiber material are parallel to the short edge of the flexible membrane 1; when a PET or TPU material is selected, the elastic modulus of the PET or TPU is required to be more than or equal to 3.0Gpa, and the amount of the material which is stretched and deformed is reduced;
the substrate material 4 is convenient for the screen to curl, the screen performance and the flattening smoothness are not influenced after the curling, and the thickness h of the substrate material 4 is more than 0 and less than or equal to 0.25 mm.
Further, the material of the inner frame 31 and the outer frame 32 may be stainless steel, aluminum alloy or other materials with better rigidity, and the inner frame 31 and the outer frame 32 need to satisfy that the bending deformation amount of the materials is less than or equal to 0.24 mm and the yield strength of the materials is greater than or equal to 100Mpa under the pressure of 380N, so that the durability of the screen can be ensured. The cross section of the inner frame 31 is not rectangular, but is in a shape of a right-angled inverted trapezoid, the inclined angle a between the inclined waist of the right-angled inverted trapezoid and the vertical direction is not less than 1 degree and not more than 3 degrees, and the inclined waist of the right-angled inverted trapezoid is positioned on one side adjacent to the flexible membrane 1, as shown in fig. 2. The splicing positions of the 4 corners of the inner frame 31 adopt a double-corner piece hidden connection structure, so that the connection strength and the stability of the inner frame are effectively enhanced, as shown in fig. 4.
The size of the inner frame 31 is larger than that of the flexible membrane 1, and the difference between the sizes of the inner frame and the flexible membrane is equal to 4 times of the thickness of the flexible membrane 1.
Further, the elastic modulus of the elastic element 2 is greater than or equal to 0.9Gpa, and a rubber band, a spring, or the like may be used.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (7)
1. A flexible rollable optical projection screen, comprising a rollable flexible membrane (1), an elastic element (2) and a metal frame (3);
the metal frame (3) comprises a square inner frame (31) and an outer frame (32), the outer frame (32) completely suspends on the periphery of the inner frame (31), the inner frame (31) is not in contact with the outer frame (32), and the inner frame (31) is connected with the outer frame (32) through screws; four sides of the back of the inner frame (31) close to the edge of the inner frame are respectively provided with an inward bending groove (33);
a layer of substrate material (4) is adhered to the back surface of the flexible membrane (1), and the size of the substrate material (4) is larger than that of the flexible membrane (1); the edge of the substrate material (4) passes through a gap between the inner frame (31) and the outer frame (32) and is connected with the elastic element (2) through a hook; the other end of the elastic element (2) is hooked in the groove (33) through a hook;
the screw for connecting the inner frame (31) and the outer frame (32) is sleeved with an insulating sleeve;
the flexible membrane (1) consists of optical film layers coated with a plurality of layers of micro optical structures, and sequentially comprises a hardening layer, a first PET base film layer, a color layer, a second PET base film layer, an optical structure layer and a metal reflection layer, wherein the optical structure layer comprises a Fresnel structure, a linear grating structure or a brightness enhancement film structure; the thickness of the flexible membrane (1) is less than 2 mm; the metal reflecting layer is made of high-reflection materials and coated on the optical structure layer through a spraying, printing or electroplating process; the gain of the central point of the flexible membrane (1) is required to be greater than 0.8 by the metal reflecting layer, and the gain calculation method comprises the following steps: in dark room conditions, it is gentleThe sexual diaphragm (1) projects a standard white field picture, and then the brightness L of the central point of the screen is respectively tested5Illuminance l of the harmony light machine5And calculating the gain: gain ═ L5*π/l5。
2. A flexible rollable optical projection screen according to claim 1, wherein the substrate material (4) is provided with openings for screws to pass through, the size of the openings being larger than the size of the screws.
3. A flexible rollable optical projection screen according to claim 1, wherein the backing material (4) is attached to the metallic reflective layer by means of a sticker, an AB glue, a photo-curing glue or an EVA hot melt glue for protecting the metallic reflective layer and for supporting and flattening the flexible membrane (1);
the substrate material (4) is required to meet the requirement that the substrate material is subjected to a tensile force of 1.8X10 in the horizontal direction per square millimeter-4In the case of N, the amount of deformation is less than or equal to 0.01 mm;
the substrate material (4) comprises a fibrous material, PET or TPU: when the fiber material is selected, the warp threads of the fiber material are parallel to the long edge of the flexible membrane (1), and the weft threads of the fiber material are parallel to the short edge of the flexible membrane (1); when a PET or TPU material is selected, the elastic modulus of the PET or TPU is required to be more than or equal to 3.0 Gpa;
the thickness h of the substrate material (4) is more than 0 and less than or equal to 0.25 mm.
4. A flexible rollable optical projection screen according to claim 1, wherein the inner frame (31) and the outer frame (32) have a material bending deflection of less than or equal to 0.24 mm and a material yield strength of greater than or equal to 100Mpa under a pressure of 380N.
5. A flexible rollable optical projection screen according to claim 1 or 4, wherein the cross-section of the inner frame (31) is in the shape of a right-angled inverted trapezoid, the angle of inclination a of the oblique waist of the right-angled inverted trapezoid to the vertical being 1 ° -3 °, the oblique waist of the right-angled inverted trapezoid being located at the side adjacent to the flexible membrane (1).
6. A flexible rollable optical projection screen according to claim 1, wherein the size of the inner frame (31) is larger than the size of the flexible membrane (1), the difference being equal to 4 times the thickness of the flexible membrane (1).
7. A flexible rollable optical projection screen according to claim 1, wherein the elastic element (2) has an elastic modulus greater than or equal to 0.9 Gpa.
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| CN201810295294.3A CN108628082B (en) | 2018-04-04 | 2018-04-04 | Flexible optical projection screen that can curl |
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| CN201810295294.3A CN108628082B (en) | 2018-04-04 | 2018-04-04 | Flexible optical projection screen that can curl |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11191372B2 (en) * | 2018-12-19 | 2021-12-07 | Hisense Laser Display Co., Ltd. | Screen frame and laser projection display device |
| US11305209B2 (en) * | 2019-03-07 | 2022-04-19 | Universal City Studios Llc | Actuatable surface techniques |
| CN113406853B (en) * | 2020-03-16 | 2023-12-26 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN113406852A (en) * | 2020-03-16 | 2021-09-17 | 青岛海信激光显示股份有限公司 | Projection device |
| CN111983881A (en) * | 2020-07-21 | 2020-11-24 | 清远市星徽精密制造有限公司 | Adjustable folding type light-resistant curtain mounting mechanism |
| CN112019784B (en) * | 2020-08-27 | 2022-09-27 | 海信视像科技股份有限公司 | Television receiver |
| WO2023020543A1 (en) * | 2021-08-17 | 2023-02-23 | 青岛海信激光显示股份有限公司 | Projection apparatus |
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| TWI385467B (en) * | 2011-03-08 | 2013-02-11 | Martin Chien | Optical projection screen |
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| CN104049449A (en) * | 2014-07-07 | 2014-09-17 | 极品影视设备科技(深圳)有限公司 | Borderless frame curtain |
| CN206479762U (en) * | 2017-02-10 | 2017-09-08 | 广州市雄云视听设备有限公司 | A kind of narrow side picture frame projection screen of arc |
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