CN111624844B - Optical projection screen and projection system - Google Patents
Optical projection screen and projection system Download PDFInfo
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- CN111624844B CN111624844B CN202010733659.3A CN202010733659A CN111624844B CN 111624844 B CN111624844 B CN 111624844B CN 202010733659 A CN202010733659 A CN 202010733659A CN 111624844 B CN111624844 B CN 111624844B
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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
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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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Abstract
An optical projection screen and a projection system belong to the technical field of optical projection, wherein the optical projection screen comprises a surface layer, an imaging layer and a reflecting layer which are sequentially arranged along the direction of a viewer, the reflecting layer comprises an optical microstructure layer, and the optical microstructure layer is formed by a plurality of optical microstructure blocks which are sequentially arranged in the vertical direction of the optical projection screen along a concentric circular arc array or a plurality of optical microstructure blocks which are sequentially arranged in the horizontal direction of the optical projection screen along an elliptical circular arc array with the center at the same point; the optical micro-structure block comprises two main reflecting surfaces, and an included angle is formed between the intersection line of the main reflecting surfaces in the space and the screen plane of the optical projection screen. The invention adjusts the projection light to reflect towards the direction of a viewer by controlling the included angle between the optical microstructure block and the screen plane, obviously reduces the loss of the optical projection screen to the projection light emitted by the projector, improves the light energy utilization rate, and ensures that the optical projection screen and the projection system have extremely high brightness gain and brightness uniformity.
Description
Technical Field
The invention belongs to the technical field of optical projection, relates to an optical projection screen and a projection system, and particularly relates to an optical projection screen and a projection system with high brightness gain and high brightness uniformity.
Background
In recent years, with the development of projection display technology, projection televisions equipped with optical projection screens and projectors have become more and more popular among consumers due to their excellent performance, such as wide color gamut, true color, and healthy eye protection. Generally, a projector in a projection television has a decisive influence on the color gamut, color, brightness and other performances of the whole projection television system, but with the popularization of the household projection television, the problems of high energy consumption, large size, too heavy weight and the like of the existing projector become pain points which are generally concerned by consumers. Therefore, the projection size is small, the arrangement is convenient, the brightness is reduced, and the reduction of energy consumption becomes a common target of various manufacturers. However, the brightness of the projector is reduced and then the projector is matched with the existing optical projection screen, because the brightness gain of the existing optical projection screen is not high, the brightness gain of the existing optical projection screen is 1.0, which is similar to the brightness gain value of the common white wall, the overall brightness of the projection television is low, which is unacceptable for consumers.
As shown in fig. 1, the optical structures 101 in the optical projection screen of the prior art are arranged parallel to the screen surface, the grooves of the optical structures 101 are arranged vertically and downwardly along the screen surface, three beams of projection light E emitted by the projector T are incident on the optical structures 101 at different incident angles, and are reflected by the optical structures 101 to form the light E1、E2And E3Three reflected light beams, wherein the reflected light beam E3Due to the projection light E and the screenThe tilt angle of the surface is small, and no reflection is formed along the groove direction of the optical structure 101, so that the surface is transmitted to the viewer after being reflected by the optical structure 101; and the other two reflected rays E1And E2Because the inclination angle between the projection light E and the screen surface is large, the projection light E is reflected by the optical structure 101 and then transmitted along the vertical direction of the groove of the optical structure 101 to the direction deviating from the viewer, so that the more the projection light is transmitted to the edge of the projection screen, the more the projection light is lost, and the problems of uneven brightness and low brightness gain of the projection screen are caused.
As shown in fig. 2, the optical structures 101 in the optical projection screen of the prior art are arranged parallel to the screen surface, the grooves of the optical structures 101 are arranged along the horizontal direction of the screen surface, three beams of projection light E emitted by the projector T are incident on the optical structures 101 at different incident angles, and are reflected by the optical structures 101 to form the light E4、E5And E6Three reflected light beams, wherein the reflected light beam E6Because the inclination angle between the projection light and the screen surface is small, reflection along the groove direction of the optical structure 101 cannot be formed, and the projection light is transmitted to the direction of a viewer after being reflected by the optical structure 101; and the other two reflected rays E4And E5Because the inclination angle between the projection light E and the screen surface is large, the projection light E is reflected by the optical structure 101 and then transmitted along the horizontal direction of the groove of the optical structure 101 to the direction deviating from the viewer, so that the more the projection light is transmitted to the edge of the projection screen, the more the projection light is lost, and the problems of uneven brightness and low brightness gain of the projection screen are caused.
In summary, the reason that the brightness gain of the existing optical projection screen is not high is that the light rays incident on the existing optical projection screen by the projector are more inclined toward the edge of the projection screen, and are more easily reflected to the direction far away from the viewer by the optical projection screen, so that the large-angle projection light rays are not seen by the viewer, and the result that the brightness gain of the optical projection screen is low, the edge is too dark, and the middle is too bright and the brightness uniformity is poor is formed.
Disclosure of Invention
Aiming at the problems, the invention breaks through the optical projection screen technology, develops an optical projection screen, can obviously reduce the loss of projection light emitted by a projector, improves the light energy utilization rate, obtains extremely high brightness gain, can enable the overall brightness of the projection television not to be influenced even if the brightness of the projector is lower, and effectively solves the problem of the overall brightness of the projection television being lower due to the brightness reduction of the projector. In addition, the optical projection screen technology can converge the projection light around the optical projection screen to the viewer, so that the overall brightness of the optical projection screen becomes uniform, and the problems of too bright middle and too dark edge of the existing optical projection screen, which are nonuniform in brightness, are solved.
The optical projection screen of the invention is realized by the following scheme:
the utility model provides an optical projection screen includes superficial layer, imaging layer and the reflection stratum that sets gradually from the viewer orientation, the reflection stratum includes the optical microstructure layer, the optical microstructure layer by a plurality of optical microstructure pieces that the vertical direction of optical projection screen arranged in proper order form along concentric circular arc array, the optical microstructure piece includes two main reflection planes, the intersection line of main reflection plane in the space with there is the projection on the perpendicular and parallel face with vertical direction of curtain plane of optical projection screen, there is contained angle alpha in vertical direction with the curtain plane of projection, contained angle alpha follows in vertical direction the periphery of the concentric circular arc of optical projection screen reduces gradually towards centre of a circle direction.
In addition, the invention also provides another technical scheme that: the utility model provides an optical projection screen includes superficial layer, formation of image layer and the reflection stratum that sets gradually from viewer's direction, the reflection stratum includes the optical microstructure layer, the optical microstructure layer by a plurality of optical microstructure pieces that the optical projection screen horizontal direction arranged in proper order are formed at the elliptic arc line array of same point along the center, the optical microstructure piece includes two main reflecting surfaces, main reflecting surface in the space intersect with there is contained angle beta in the curtain plane of optical projection screen, contained angle beta follows in vertical direction the optical projection screen reduces gradually toward the central direction at the outer lane of elliptic arc line.
In a preferred option of the embodiment of the present invention, in the optical projection screen, the main reflective surfaces intersect in space to form an included angle γ, where the included angle γ is 75 ° to 105 °, and the included angle range has a very good effect of controlling the transmission of the projection light to the viewer direction and further controlling the viewable angle of the optical projection screen.
In a preferred option of the embodiment of the present invention, in the optical projection screen, a cross-sectional shape of the optical microstructure block is a triangle or a trapezoid.
In a preferred option of the embodiment of the present invention, in the optical projection screen, the reflecting surfaces where the two short sides of the triangle are located are a first main reflecting surface and a second main reflecting surface respectively; the first main reflecting surface and the second main reflecting surface are completely attached with mirror reflecting materials, or the first main reflecting surface and the second main reflecting surface are partially attached with diffuse reflecting materials.
In a preferred option of the embodiment of the present invention, in the optical projection screen, the reflection surfaces where the two waists of the trapezoid are located are a first main reflection surface and a second main reflection surface respectively, and the reflection surface where the upper bottom surface of the trapezoid is located is a third reflection surface; the first main reflecting surface, the second main reflecting surface and the third reflecting surface are all attached with mirror-surface reflecting materials, or the first main reflecting surface and the second main reflecting surface are all attached with mirror-surface reflecting materials, the third reflecting surface is attached with diffuse reflecting materials, or only the third reflecting surface is attached with mirror-surface reflecting materials.
In a preferred option of the embodiment of the present invention, in the optical projection screen, a black light absorbing material layer is further disposed on a side of the optical micro-structural layer away from the imaging layer.
In a preferred option of the embodiment of the present invention, in the optical projection screen, a center of the concentric arc deviates from a geometric center of the optical projection screen and is close to a side of the projector.
In a preferred option of the embodiment of the present invention, in the optical projection screen, an elliptical central point of the elliptical arc line deviates from a geometric center of the optical projection screen and is close to a side of the projector.
In a preferred option of the embodiment of the present invention, in the optical projection screen, a side of the surface layer, which is away from the imaging layer, is a rough surface, and the rough surface can effectively eliminate a "solar effect" of the optical projection screen, so as to improve a viewing comfort of the optical projection screen.
In a preferred option of the embodiment of the present invention, in the above optical projection screen, the imaging layer includes at least one of a diffusion particle layer, a point-like lens array layer, a diffusion surface layer, and a linear-type cylindrical microlens array layer.
In a preferred option of the embodiment of the present invention, in the above optical projection screen, the imaging layer includes at least two stacked diffusion particle layers or at least two stacked point lens array layers or at least two stacked diffusion surface layers or at least two stacked linear lenticular microlens array layers.
In a preferred option of the embodiment of the present invention, in the above-mentioned optical projection screen, at least one substrate is further included, the substrate is disposed on at least one of the surface layer, the imaging layer and the reflective layer, and the substrate material is polyethylene terephthalate, polyvinyl chloride, polymethyl methacrylate, polycarbonate, polyurethane, thermoplastic polyurethane elastomer rubber, polypropylene, biaxially oriented polypropylene film, polyethylene or transparent glass.
The projection system of the invention is realized by the following scheme:
the projection system comprises a projector and the optical projection screen.
Compared with the prior art, the invention has the following beneficial effects:
the optical projection screen can remarkably reduce the loss of projection light emitted by a projector on the optical projection screen through the arrangement of the optical microstructure layer, improve the light energy utilization rate and obtain extremely high brightness gain; the optical projection screen technology can converge the projection light around the optical projection screen to a viewer, so that the overall brightness of the optical projection screen becomes uniform. The projection system formed by the optical projection screen has the functions of high light energy utilization rate, low energy consumption, high brightness gain, high brightness uniformity, wide color gamut, real color and healthy eye protection.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of a path of projection light emitted by a projector in a conventional projection system;
FIG. 2 is a schematic diagram of a path of projection light emitted by a projector in another conventional projection system;
FIG. 3 is a three-view diagram of an optical projection screen according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of the relationship between the optical microstructure block and the parallel surface of the screen surface according to the first embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an effect of an optical projection screen on projection light according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a relationship between an optical microstructure block and a projection light angle according to a first embodiment of the present invention;
FIG. 7 is a block diagram of an optical microstructure according to a first embodiment of the present invention;
FIG. 8 is a first schematic view of an optical micro-structural block attached with other structures according to a first embodiment of the present invention;
FIG. 9 is a second schematic view of an optical micro-structural block attached with other structures according to a first embodiment of the present invention;
FIG. 10 is a side view of an optical projection screen with a layer of optically absorbing material according to an embodiment of the present invention;
FIG. 11 is a schematic diagram illustrating a relationship between a geometric center of an optical projection screen and a center of a concentric arc according to a first embodiment of the present invention;
FIG. 12 is a first schematic view of an imaging layer structure according to a first embodiment of the present invention;
FIG. 13 is a second schematic structural diagram of an imaging layer according to the first embodiment of the present invention;
FIG. 14 is a third schematic view of an imaging layer structure according to a first embodiment of the present invention;
FIG. 15 is a fourth schematic structural diagram of an imaging layer according to the first embodiment of the present invention;
FIG. 16 is a fifth schematic view of an imaging layer structure according to the first embodiment of the invention;
FIG. 17 is a sixth schematic view of an imaging layer structure according to a first embodiment of the invention;
FIG. 18 is a seventh schematic structural diagram of an imaging layer according to the first embodiment of the present invention;
FIG. 19 is a diagram illustrating an eighth exemplary imaging layer structure according to the first embodiment of the present invention;
FIG. 20 is a third view of an optical projection screen according to a second embodiment of the present invention;
FIG. 21 is a schematic diagram showing the relationship between the intersection line of the two main reflective surfaces of the optical microstructure block in space and the plane parallel to the screen surface in the second embodiment of the present invention;
FIG. 22 is a third view of an optical projection screen according to a third embodiment of the present invention;
FIG. 23 is a schematic view of the relationship between the optical microstructure block and the parallel surface of the screen surface according to the third embodiment of the present invention;
FIG. 24 is a schematic diagram illustrating the operation of an optical projection screen according to a third embodiment of the present invention on projection light;
FIG. 25 is a side view of a third optical projection screen with a layer of optically absorbing material in accordance with embodiments of the present invention;
fig. 26 is a schematic view of a position relationship between a geometric center of the optical projection screen and an elliptical center of an elliptical arc line according to the third embodiment of the present invention;
FIG. 27 is a three-view diagram of an optical projection screen according to a fourth embodiment of the present invention;
FIG. 28 is a schematic diagram showing the spatial relationship between the intersection line of two main reflective surfaces of the optical microstructure block and the screen surface in parallel according to a fourth embodiment of the present invention;
FIG. 29 is a schematic view of the relationship between the optical microstructure blocks and the parallel surface of the screen surface according to a fourth embodiment of the present invention;
icon: 10-a projection screen; 20-a surface layer; 30-an imaging layer; 40-a reflective layer; 50-a plane parallel to the screen plane; 70-a black light absorbing material layer; 101-an optical structure; 301-a diffusion particle layer; 302-a spot lens array layer; 303-diffusion surface layer; 304-linear lenticular microlens array layer; 401-optical micro-structured block; 4011-a first main reflective surface; 4012 — a second main reflective surface; 4013 — a third reflective surface; 4014 — the intersection of the first main reflecting face and the second main reflecting face in space; 4015-specular reflective layer; 4016-diffuse reflective layer; a T-projector; e-projection light; g-a viewer; c1-an optical projection screen geometric center; c2-the centre of the concentric circular arcs; c3-an ellipse centre point of the ellipse circular arc line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, the terms "vertical," "horizontal," "away," "near," "up," "down," "left," "right," and the like are used merely to distinguish one description from another, and are not to be construed as merely or implying relative importance.
In the description of the present invention, the terms "disposed", "gradually", and "gradually" are to be construed broadly unless otherwise explicitly specified or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 3, fig. 3a is a front view of the optical projection screen 10, fig. 3b is a side view of the optical projection screen 10, and fig. 3c is a top view of the optical projection screen 10. An optical projection screen 10 comprises a surface layer 20, an imaging layer 30 and a reflecting layer 40 which are sequentially arranged from the direction of a viewer, wherein the reflecting layer 40 comprises an optical microstructure layer which is formed by a plurality of optical microstructure blocks 401 sequentially arranged in the vertical direction of the optical projection screen along a concentric circular arc array, each optical microstructure block 401 comprises two main reflecting surfaces which are a first main reflecting surface 4011 and a second main reflecting surface 4012 respectively, an intersecting line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space has a projective shadow on a surface which is perpendicular to a surface 50 parallel to the screen surface of the optical projection screen 10 and parallel to the vertical direction, the surface 50 parallel to the screen surface of the optical projection screen 10 has an included angle alpha in the vertical direction (namely, an intersecting line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space has a projective shadow on a surface which is perpendicular to the screen surface of the optical projection screen 10 and parallel to the vertical direction, an included angle alpha exists between the projection and the screen plane in the vertical direction), and the included angle alpha is gradually reduced from the periphery of the concentric circular arc of the optical projection screen to the direction of the circle center in the vertical direction.
To explain further, as shown in fig. 4, an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space is projected on a plane perpendicular to a plane 50 parallel to a screen surface of the optical projection screen 10 and parallel to a vertical direction, the projected image and the screen plane have an included angle α in the vertical direction, and the included angle α is sequentially marked as α in the vertical direction from the periphery of the concentric circular arcs to the center of the circle1、α2、……、αn、αn+1And α is1＞α2＞……＞αn＞αn+1。
Further, the optical projection screen 10 and the projector T of the present embodiment form a complete projection system. Fig. 5a is a top view and fig. 5b is a side view of the entire projection system. As shown in FIG. 5a, the projection light E emitted from the projector T in multiple directions is incident on the first main reflective surface 4 of the optical microstructure block of the optical projection screen011 and the second main reflecting surface 4012, and the inclined light components of the projection light E towards the left and the right are directly reflected by the first main reflecting surface 4011 and the second main reflecting surface 4012 to form the reflection light E7And transmitting to the G area of the viewer. As shown in fig. 5b, an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in the space is perpendicular to a surface 50 parallel to the screen surface of the optical projection screen 10 and has a projection on a surface parallel to the vertical direction, an included angle α exists between the projection and the screen plane in the vertical direction, and the included angle α gradually decreases from the periphery of the concentric circular arc of the optical projection screen to the center of the circle in the vertical direction, so that the projection light rays E in multiple directions emitted by the projector T are reflected to form a reflection light ray E7The optical projection screen is transmitted to a G area of a viewer, so that the optical projection screen has the effects of high brightness gain and brightness uniformity, and the problems of low brightness gain and uneven brightness of the optical projection screen caused by that a large amount of projection light is reflected to the outside of the region of the viewer along the groove direction under the obliquely incident projection light of the optical projection screen in the prior art are solved.
Further, as shown in fig. 6, it is assumed that a projection light E emitted by the projector T is reflected by the optical microstructure block 401 of the optical projection screen and then emitted in parallel to the horizontal direction, an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in the space is projected on a surface perpendicular to the surface 50 parallel to the screen surface of the optical projection screen 10 and parallel to the vertical direction, an included angle α exists between the projected light E and the screen surface in the vertical direction, and an included angle θ between the projection light E emitted by the projector T and the horizontal direction is1Calculated to give α = θ1And 2, the included angle alpha can be calculated only by determining the angle range of the emergent light according to the viewing field and further combining the angles of the projection light at all positions on the optical projection screen.
Further, the cross-sectional shape of the optical microstructure block 401 of the present embodiment may be a trapezoidal structure as shown in fig. 7 a; the cross-sectional shape of the optical microstructure block 401 of this embodiment may also be a trapezoid-like structure as shown in fig. 7b, i.e. the cross-section of the structure is formed by combining three line segments and one arc curve; the cross-sectional shape of the optical micro-structure block 401 of this embodiment may also be a triangular structure as shown in fig. 7 c. As shown in fig. 7a, when the cross section of the optical microstructure block 401 is a trapezoid structure, the optical microstructure block 401 includes a first main reflecting surface 4011, a second main reflecting surface 4012, and a third reflecting surface 4013, the planes of two waists of the trapezoid are the first main reflecting surface 4011 and the second main reflecting surface 4012, respectively, and the plane of the shorter base of the trapezoid is the third reflecting surface 4013; as shown in fig. 7b, when the cross section of the optical microstructure block 401 is in a trapezoid-like structure, the optical microstructure block 401 includes a first main reflecting surface 4011, a second main reflecting surface 4012 and a third reflecting surface 4013, the planes where two waists of the trapezoid-like structure are located are the first main reflecting surface 4011 and the second main reflecting surface 4012 respectively, the plane where the arc curve is located is the third reflecting surface 4013, the third reflecting surface formed by the arc curve can be regarded as formed by innumerable reflecting surfaces, and when the third reflecting surface 4013 is a plane formed by the arc curve, the reflection of the projection light incident in each direction is more accurate and easier to control than that of a simple linear plane, so that the more reflecting surfaces are, the better brightness gain and brightness uniformity of the optical projection screen can be obtained; as shown in fig. 7c, when the cross-sectional shape of the optical microstructure block 401 is a triangular structure, the optical microstructure block 401 includes a first main reflecting surface 4011, a second main reflecting surface 4012, and an intersection line 4014 of the first main reflecting surface 1011 and the second main reflecting surface 4012 in space, and the planes of two waists of the triangle are the first main reflecting surface 4011 and the second main reflecting surface 4012, respectively.
Further, when the optical micro-structure block 401 has a cross-sectional shape of a triangular structure, other structures may be attached. As shown in fig. 8a, a specular reflection layer 4015 is attached all over the first main reflection surface 4011 and the second main reflection surface 4012; as shown in fig. 8b, a specular reflecting layer 4015 is partially attached to the first main reflecting surface 4011, a diffuse reflecting layer 4016 is partially attached to the other part, a specular reflecting layer 4015 is also partially attached to the second main reflecting surface 4012, and a diffuse reflecting layer 4016 is attached to the other part; as shown in fig. 8c, a diffuse reflection layer 4016 is entirely attached on the first main reflection surface 4011 and the second main reflection surface 4012; as shown in fig. 8d, a diffusive reflecting layer 4016 is attached only to a portion of the first main reflecting surface 4011 and the second main reflecting surface 4012; as shown in fig. 8e, a specular reflection layer 4015 is attached only to portions of the first main reflection surface 4011 and the second main reflection surface 4012; as shown in fig. 8f, no reflective layer is attached to any position of the first main reflecting surface 4011 and the second main reflecting surface 4012.
Further, when the optical micro-structure block 401 has a trapezoidal cross-sectional shape, other structures may be attached. As shown in fig. 9a, a specular reflection layer 4015 is attached all over the first main reflection surface 4011, the second main reflection surface 4012, and the third reflection surface 4013; as shown in fig. 9b, a specular reflection layer 4015 is entirely attached only on the third reflection surface 4013; as shown in fig. 9c, a diffuse reflection layer 4016 is fully attached to the first main reflecting surface 4011 and the second main reflecting surface 4012, and a specular reflection layer 4015 is fully attached to the third reflecting surface 4013; as shown in fig. 9d, a diffuse reflection layer 4016 is attached all over the first main reflection surface 4011, the second main reflection surface 4012 and the third reflection surface 4013; as shown in fig. 9e, the diffuse reflecting layer 4016 is entirely attached only on the third reflecting surface 4013; as shown in fig. 9f, a specular reflection layer 4015 is entirely attached to the first main reflection surface 4011 and the second main reflection surface 4012, and a diffuse reflection layer 4016 is entirely attached to the third reflection surface 4013; further, it is also possible that no reflective layer (not shown in the figure) is attached to any position of the first main reflecting surface 4011, the second main reflecting surface 4012, and the third reflecting surface 4013.
To explain further, the diffuse reflection layer 4016 and the specular reflection layer 4015 both reflect the projection light, and can be selected according to the requirement. The diffuse reflecting layer 4016 and the specular reflecting layer 4015 differ in that: the direction of the reflected light formed after the projection light enters the specular reflection layer is only related to the direction of the projection light and the normal direction of the specular reflection layer, wherein the included angle between the projection light and the normal direction of the specular reflection layer is equal to the included angle between the reflected light and the normal direction of the specular reflection layer; the projection light is incident on the diffuse reflection layer to form reflection light in all directions, and the diffuse reflection layer has a scattering effect on the projection light; in addition, compared with the diffuse reflection layer, the surface of the specular reflection layer is smoother, and the reflective material particles forming the specular reflection layer are finer; the specular reflection layer is generally formed by electroplating by means of thermal evaporation, magnetron sputtering, ion beam sputtering, or the like, and the diffuse reflection layer is generally formed by coating by means of spraying, printing, coating, or the like.
As a further supplementary explanation, when any reflecting layer is not attached to any position of all the reflecting surfaces, the following condition needs to be satisfied: (1) the refractive index of the optical micro-structure block 401 is greater than the refractive index of the next layer structure in the light transmission direction; (2) the included angle between the first main reflecting surface 4011 and the second main reflecting surface 4012 on the optical microstructure block 401 and the projection light is larger than or equal to the critical angle of total reflection. The projection light emitted by the projector is incident on the optical microstructure block, and the included angle between the projection light and the first main reflecting surface and the included angle between the projection light and the second main reflecting surface are mainly determined by the projection ratio of the projector and the refractive index of each structural layer of the optical projection screen; under the condition of determining the refractive indexes of the structure layers of the projector and the optical projection screen, the included angle between the projection light and the first main reflecting surface 4011 and the included angle between the projection light and the second main reflecting surface 4012 can meet the conditions only by adjusting the included angle gamma formed by the intersection of the first main reflecting surface and the second main reflecting surface of the optical microstructure block in the space, so that all the reflecting surfaces on the optical microstructure block do not need to be attached with any reflecting layer, and the projection light can be reflected to the viewing area of a viewer. Further, in order to make the first main reflecting surface and the second main reflecting surface of the optical microstructure block intersect in space to form an included angle γ which can match different projectors and different optical projection screens, the first main reflecting surface 4011 and the second main reflecting surface 4012 intersect in space to form an included angle γ of preferably 75 ° to 105 °.
Further, as shown in fig. 10, the optical projection screen further includes a black light absorbing material layer 70 disposed on the optical micro-structured block 401 away from the imaging layer 30. The black light absorbing material layer 70 is mainly used to absorb ambient light and improve the contrast of the optical projection screen. The black light absorbing material layer may be formed on the optical microstructure block 401 by spraying, printing, or coating one or more of carbon black, copper-chromium black, carbon, graphite, black iron oxide, aniline black dye, and the like.
Further, as shown in fig. 11, the relationship between the geometric center of the optical projection screen and the center of the concentric circular arc is schematically illustrated. Of concentric circular arcsCenter C2Off the geometric center C of the optical projection screen1And is adjacent to one side of the projector T.
Furthermore, the side of the surface layer of the optical projection screen, which is close to the viewer, is provided with a rough surface, a fine structure can be manufactured on the surface layer, particles can be coated on the surface layer, the surface layer can be roughened in a frosting mode or an etching mode, and then the projection light is scattered on the surface layer, and the projection light is homogenized and the glare is eliminated.
Further, the imaging layer of the optical projection screen comprises at least one of a diffusion particle layer, a point lens array layer, a diffusion surface layer and a linear cylindrical microlens layer. That is, the imaging layer can be any one of a diffusion particle layer, a point lens array layer, a diffusion surface layer and a linear columnar microlens array layer; or any two of the diffusion particles, the point lens array layer, the diffusion surface layer and the linear columnar micro lens array layer can be laminated; the lens can also be formed by laminating any three of a diffusion particle layer, a point lens array layer, a diffusion surface layer and a linear columnar micro lens array layer without limiting the position relation; the lens can also be formed by laminating four types of diffusion particle layers, point-shaped lens array layers, diffusion surface layers and linear columnar micro-lens array layers, and the position relation among the layers is not limited. The formed imaging layer can play a role in expanding the viewing field and eliminating moire fringes. Fig. 12 to 19 are schematic diagrams showing eight possible structures of the imaging layer of the optical projection screen in the present embodiment. As shown in fig. 12, the imaging layer 30 is composed of a single diffusion particle layer 301, and a plurality of diffusion particles are mixed in the diffusion particle layer 301, and the diffusion particles may be mixed in the diffusion particle layer in an ordered manner or in a disordered manner. As shown in fig. 13, the imaging layer 30 is formed by stacking several diffusion particle layers 301. As shown in fig. 14, the imaging layer 30 is composed of a dot lens array layer 302. As shown in fig. 15, the imaging layer 30 is formed by stacking several dot-shaped lens array layers 302. As shown in fig. 16, imaging layer 30 is formed of a diffusion surface layer 303. As shown in fig. 17, the imaging layer 30 is formed by stacking several diffusion surface layers 303. As shown in FIG. 18, the imaging layer 30 is formed by a linear lenticular microlens array layer 304. As shown in fig. 19, the imaging layer 30 is formed by stacking several linear lenticular microlens array layers 304.
Furthermore, the optical projection screen further comprises at least one layer of substrate, wherein the substrate material can be polyethylene terephthalate, polyvinyl chloride, polymethyl methacrylate, polycarbonate, polyurethane, thermoplastic polyurethane elastomer rubber, polypropylene, biaxially oriented polypropylene film, polyethylene or transparent glass. When the optical projection screen only has one layer of base material, the base material can be arranged on the surface layer, the imaging layer or the reflecting layer; when the optical projection screen comprises a multilayer substrate, it may be disposed on at least one of the surface layer, the imaging layer, and the reflective layer. The substrate is mainly used for supporting various optical structures on a surface layer, an imaging layer and a reflecting layer, and at the same time, the substrate itself has excellent light transmission performance.
The optical projection screen of the embodiment can remarkably reduce the loss of projection light emitted by the projector on the optical projection screen through the arrangement of the optical microstructure layer, improve the light energy utilization rate and obtain extremely high brightness gain; the optical projection screen technology can converge the projection light around the optical projection screen to a viewer, so that the overall brightness of the optical projection screen becomes uniform. The projection system formed by the optical projection screen has the functions of high light energy utilization rate, low energy consumption, high brightness gain, high brightness uniformity, wide color gamut, real color and healthy eye protection.
Example two
On the basis of the first embodiment, it is determined that the optical microstructure block 401 includes three reflecting surfaces. Fig. 20 is a three-dimensional view of the optical projection screen 10, in which fig. 20a is a front view of the optical projection screen 10, fig. 20b is a side view of the optical projection screen 10, and fig. 20c is a top view of the optical projection screen 10. An optical projection screen 10 comprises a surface layer 20, an imaging layer 30 and a reflecting layer 40 which are sequentially arranged from the direction of a viewer, wherein the reflecting layer 40 comprises an optical microstructure layer, and the optical microstructure layer is formed by a plurality of optical microstructure blocks 401 which are sequentially arranged along the vertical direction of the optical projection screen in an array manner in the horizontal direction of the optical projection screen; each optical microstructure block 401 includes three reflecting surfaces, a first main reflecting surface 4011, a second main reflecting surface 4012, and a third reflecting surface 4013. As shown in fig. 21, an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space has a projection on a plane perpendicular to a plane 50 parallel to a screen surface of the optical projection screen 10 and parallel to a vertical direction, the projection and the screen plane have an included angle α in the vertical direction, and the included angle α gradually decreases from the periphery of a concentric circular arc of the optical projection screen to the direction of a circle center in the vertical direction; the first main reflecting surface 4011 and the second main reflecting surface 4012 intersect in space to form an included angle γ of preferably 75 ° to 105 °. The effect obtained by the present embodiment is the same as that of the first embodiment.
EXAMPLE III
Fig. 22 is a three-dimensional view of the optical projection screen 10, wherein fig. 22a is a front view of the optical projection screen 10, fig. 22b is a side view of the optical projection screen 10, and fig. 22c is a top view of the optical projection screen 10. An optical projection screen 10 comprises a surface layer 20, an imaging layer 30 and a reflecting layer 40 which are sequentially arranged along the direction of a viewer, wherein the reflecting layer comprises an optical microstructure layer, the optical microstructure layer is formed by a plurality of optical microstructure blocks 401 which are sequentially arranged in the horizontal direction of the optical projection screen along an elliptical arc array with the centers at the same point, the optical microstructure blocks 401 comprise two main reflecting surfaces which are respectively a first main reflecting surface 4011 and a second main reflecting surface 4012, an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space and a screen plane 50 of the optical projection screen form an included angle beta, and the first main reflecting surface 4011 and the second main reflecting surface 4012 intersect in space to form an included angle gamma.
To explain further, as shown in fig. 23, an intersection line 4014 of the first main reflecting surface and the second main reflecting surface in space and a plane 50 parallel to the screen surface of the optical projection screen form an included angle β, which is sequentially marked as β from the outer circle of the elliptic arc line to the center direction in the vertical direction1、β2、……、βnAnd β1＞β2＞……＞βn。
Further, the optical projection screen and the projector T of the present embodiment form a complete projection system. Fig. 24a is a top view and fig. 24b is a side view of the entire projection system. As shown in fig. 24a, the projection light E emitted from the projector T in multiple directions is incident on the first main reflecting surface 4011 and the second main reflecting surface 4012 of the optical microstructure block of the optical projection screen, and the inclined light components of the projection light E towards the left and right sides are directly reflected by the first main reflecting surface 4011 and the second main reflecting surface 4012 to form the reflected light E8And transmitting to the G area of the viewer. As shown in fig. 24b, an included angle β exists between an intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in the space and a plane 50 parallel to the screen surface of the optical projection screen 10, and the included angle gradually decreases from the outer circle of the elliptical arc line to the center direction, so that the projection light rays E emitted by the projector T in multiple directions are reflected to form reflected light rays E8The optical projection screen is transmitted to a G area of a viewer, so that the optical projection screen has the effects of high brightness gain and brightness uniformity, and the problems of low brightness gain and uneven brightness of the optical projection screen caused by that a large amount of projection light is reflected to the outside of the region of the viewer along the groove direction under the obliquely incident projection light of the optical projection screen in the prior art are solved.
Further, the first main reflecting surface 4011 and the second main reflecting surface 401 intersect in space to form an included angle γ, which can effectively control the transmission direction of the reflected projection light incident on the first main reflecting surface 4011 and the second main reflecting surface 4012, and is used to adjust the viewable field of the optical projection screen and the distribution of the light energy on the screen. When the optical projection screen needs a smaller viewing field, the gamma is reduced, so that light can be converged to obtain the smaller viewing field; when the optical projection screen needs a larger viewing field, the light can be dispersed by increasing gamma, and the larger viewing field can be obtained. According to actual requirements, gamma is preferably 75-105 degrees so as to meet the requirement on viewing fields of the optical projection screen and obtain uniform energy distribution; when gamma is 90 deg., the reflected projection light can be returned along the incident projection light direction, and the light energy loss is minimized, so that the optical projection screen can obtain extremely high brightness gain.
Further, the angle γ formed by the intersection of the first main reflecting surface 4011 and the second main reflecting surface 4012 in the optical microstructure block in space is unique to one optical microstructure block 401, that is, the position of each optical microstructure block 401 on the optical projection screen 10 is different, and the angle β between the intersection line 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 in space on the optical microstructure block 401 and the plane 50 parallel to the screen surface of the optical projection screen 10 is changed, that is, the optical microstructure blocks are arranged obliquely on the screen surface, and the inclination angle thereof is also changed, but γ on the same optical microstructure block is not changed along with the inclination of the optical microstructure block.
Further, along with the position of the optical microstructure block on the whole optical projection screen being different, the intersection angle γ formed by the first main reflective surface and the second main reflective surface of each optical microstructure block 401 intersecting in space may be the same or different; or may be partially the same and partially different. The first main reflecting surface and the second main reflecting surface on the optical microstructure block at each position on the screen can be adjusted to form an included angle gamma in the space according to the requirement of a viewer on the viewing field of the screen, so that the required viewing field and the brightness uniformity are obtained.
Further, as shown in fig. 25, the optical projection screen further includes a black light absorbing material layer 70 disposed on the optical micro-structured block 401 away from the imaging layer 30. The black light absorbing material layer 70 is mainly used to absorb ambient light and improve the contrast of the optical projection screen. The black light absorbing material layer may be formed on the optical microstructure block 401 by spraying, printing, or coating one or more of carbon black, copper-chromium black, carbon, graphite, black iron oxide, aniline black dye, and the like.
Further, as shown in fig. 26, a schematic diagram of a position relationship between a geometric center of the optical projection screen and an elliptical center point of the elliptical arc line; ellipse center point C of ellipse arc line3Off the geometric center C of the optical projection screen1And is adjacent to one side of the projector T.
The arrangement of the imaging layer and the like in this embodiment has been described in detail in the first embodiment, and the technical effects obtained are the same as those in the first embodiment, and are not described herein again.
Example four
On the basis of the third embodiment, the optical microstructure block 401 is defined to include three reflecting surfaces. As shown in fig. 27, a three-view of the optical projection screen 10; where fig. 27a is a front view of the optical projection screen 10, fig. 27b is a side view of the optical projection screen 10, and fig. 27c is a top view of the optical projection screen 10. An optical projection screen 10 includes superficial layer 20, imaging layer 30 and the reflection stratum 40 that set gradually along viewer's direction, and the reflection stratum includes the optical microstructure layer, and the optical microstructure layer is formed at the elliptic arc array of same point along the center by a plurality of optical microstructure pieces 401 that arrange in proper order at the optical projection screen horizontal direction, and optical microstructure piece 401 includes three plane of reflection, is first main plane of reflection 4011, second main plane of reflection 4012 and third plane of reflection 4013 respectively. As shown in fig. 28, an intersection 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 of the optical microstructure block 401 in space forms an included angle β with the plane 50 parallel to the screen plane of the optical projection screen 10 (i.e., an intersection 4014 of the first main reflecting surface 4011 and the second main reflecting surface 4012 of the optical microstructure block 401 in space forms an included angle β with the screen plane of the optical projection screen 10), and the first main reflecting surface 4011 and the second main reflecting surface 4012 of the optical microstructure block 401 intersect in space to form an included angle γ, γ being preferably 75 ° to 105 °.
To explain further, as shown in fig. 29, an intersection line 4014 of the first main reflecting surface and the second main reflecting surface in space and a plane 50 parallel to the screen surface of the optical projection screen form an included angle β, which is sequentially marked as β from the outer circle of the elliptic arc line to the center direction in the vertical direction1、β2、……、βnAnd β1＞β2＞……＞βn。
The effect obtained by the present embodiment is the same as that of the embodiment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall be included in the protection of the present invention.
Claims (14)
1. The utility model provides an optical projection screen, includes superficial layer, imaging layer and the reflection stratum that sets gradually from the viewer's direction, the reflection stratum includes optical microstructure layer, its characterized in that, optical microstructure layer by a plurality of optical microstructure piece that optical projection screen vertical direction arranged in proper order form along concentric circular arc array, optical microstructure piece includes two main reflection planes, the intersect of main reflection plane in the space with there is the projection on the perpendicular and parallel face with vertical direction of curtain plane of optical projection screen, there is contained angle alpha in vertical direction with the curtain plane of projection, contained angle alpha follows in vertical direction the periphery of the concentric circular arc of optical projection screen reduces gradually towards centre of a circle direction.
2. An optical projection screen according to claim 1, wherein the main reflective surfaces intersect in space to form an angle γ, said angle γ being in the range of 75 ° to 105 °.
3. An optical projection screen according to claim 1, wherein the cross-sectional shape of the optical microstructure blocks is triangular or trapezoidal.
4. An optical projection screen according to claim 3, wherein the reflecting surfaces of the two shorter sides of the triangle are a first main reflecting surface and a second main reflecting surface respectively; the first main reflecting surface and the second main reflecting surface are completely attached with mirror reflecting materials, or the first main reflecting surface and the second main reflecting surface are partially attached with diffuse reflecting materials.
5. An optical projection screen according to claim 3, wherein the reflecting surfaces of the two waists of the trapezoid are a first main reflecting surface and a second main reflecting surface respectively, and the reflecting surface of the upper bottom surface of the trapezoid is a third reflecting surface; the first main reflecting surface, the second main reflecting surface and the third reflecting surface are all attached with mirror-surface reflecting materials, or the first main reflecting surface and the second main reflecting surface are all attached with mirror-surface reflecting materials, the third reflecting surface is attached with diffuse reflecting materials, or only the third reflecting surface is attached with mirror-surface reflecting materials.
6. An optical projection screen according to claim 1, wherein the side of the optical micro-structured block remote from the imaging layer is further provided with a layer of black light absorbing material.
7. An optical projection screen according to claim 1, wherein the concentric arcs are centered off the geometric center of the optical projection screen and near one side of the projector.
8. An optical projection screen according to claim 1, wherein the side of the surface layer remote from the imaging layer is textured.
9. An optical projection screen according to claim 1 wherein the imaging layer comprises at least one of a diffusing particle layer, a dot lens array layer, a diffusing surface layer and a linear lenticular array layer.
10. An optical projection screen according to claim 1, wherein the imaging layer comprises at least two stacked diffusing particle layers or at least two stacked spot lens array layers or at least two stacked diffusing surface layers or at least two stacked linear lenticular microlens array layers.
11. An optical projection screen according to claim 1, further comprising at least one substrate disposed on at least one of the surface layer, the image-forming layer and the reflective layer, wherein the substrate is made of polyethylene terephthalate or polyvinyl chloride or polymethyl methacrylate or polycarbonate or polyurethane or thermoplastic polyurethane elastomer rubber or polypropylene or biaxially oriented polypropylene film or polyethylene or transparent glass.
12. The utility model provides an optical projection screen, includes superficial layer, imaging layer and the reflection stratum that sets gradually from the viewer's direction, the reflection stratum includes optical microstructure layer, its characterized in that, optical microstructure layer by a plurality of optical microstructure piece that optical projection screen horizontal direction arranged in proper order are formed at the elliptic arc line array of same point along the center, optical microstructure piece includes two main reflecting surfaces, main reflecting surface intersect in the space with there is contained angle beta in the curtain plane of optical projection screen, contained angle beta is followed in vertical direction the outer lane of the elliptic arc line of optical projection screen reduces gradually toward the central direction.
13. An optical projection screen according to claim 12 wherein the elliptical centre point of the elliptical arc is offset from the geometric centre of the optical projection screen and to a side thereof adjacent the projector.
14. A projection system comprising a projector and an optical projection screen according to any one of claims 1 to 13.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110955106B (en) * | 2018-09-27 | 2021-11-12 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN113641074A (en) * | 2021-02-03 | 2021-11-12 | 深圳市影迦科技有限公司 | High-brightness low-ghost projection screen |
| CN112631063A (en) * | 2021-02-25 | 2021-04-09 | 深圳市光科数字科技有限公司 | Optical imaging film and preparation process thereof |
| CN113641076A (en) * | 2021-10-18 | 2021-11-12 | 成都菲斯特科技有限公司 | Projection screen and projection system |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274406A (en) * | 1987-12-29 | 1993-12-28 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image projecting device |
| JP4289122B2 (en) * | 2003-10-28 | 2009-07-01 | ソニー株式会社 | Reflective screen and display device |
| JP2007199529A (en) * | 2006-01-27 | 2007-08-09 | Toppan Printing Co Ltd | Reflection-type projection screen and reflection-type projection display using the same |
| JP2008225298A (en) * | 2007-03-15 | 2008-09-25 | Seiko Epson Corp | Manufacturing method for micro-lens for screen |
| JP2010139639A (en) * | 2008-12-10 | 2010-06-24 | Seiko Epson Corp | Reflective screen |
| JP5630279B2 (en) * | 2011-01-14 | 2014-11-26 | セイコーエプソン株式会社 | screen |
| CN102156314A (en) * | 2011-03-25 | 2011-08-17 | 天津大学 | Isosceles micro prism and method for manufacturing mold |
| JP5834613B2 (en) * | 2011-08-16 | 2015-12-24 | 大日本印刷株式会社 | Transparent screen, interactive board, interactive board system for interactive board |
| WO2014070641A1 (en) * | 2012-10-31 | 2014-05-08 | Meacham G B Kirby | Autostereoscopic three dimensional display |
| CN103809357A (en) * | 2013-09-16 | 2014-05-21 | 吴震 | Screen and projection display system |
| KR20150114682A (en) * | 2014-04-02 | 2015-10-13 | 엘지전자 주식회사 | Reflecting screen |
| JP6438493B2 (en) * | 2014-11-27 | 2018-12-12 | 株式会社有沢製作所 | Reflective screen |
| CN106405699A (en) * | 2016-11-18 | 2017-02-15 | 四川长虹电器股份有限公司 | Directional light reflection element, tapered roller and projection screen |
| CN108345165B (en) * | 2017-01-21 | 2021-02-19 | 深圳市三铭科技有限公司 | Frameless ultrashort-focus optical hard screen |
| CN207636922U (en) * | 2017-12-28 | 2018-07-20 | 成都恒坤光显材料科技有限公司 | A kind of wide viewing angle high-gain front projection screen |
| CN108831948A (en) * | 2018-06-07 | 2018-11-16 | 善仁（浙江）新材料科技有限公司 | A kind of anti-dazzle gain of light film |
| CN110955106B (en) * | 2018-09-27 | 2021-11-12 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN209070299U (en) * | 2018-10-22 | 2019-07-05 | 江阴通利光电科技有限公司 | A kind of anti-light curtain of S-shaped |
| CN111273512A (en) * | 2018-12-04 | 2020-06-12 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN209514295U (en) * | 2018-12-24 | 2019-10-18 | 宁波激智科技股份有限公司 | A kind of optical screen |
| CN210465995U (en) * | 2019-11-12 | 2020-05-05 | 和诠科技股份有限公司 | Reflection type projection screen |
| CN110928130A (en) * | 2019-12-21 | 2020-03-27 | 成都菲斯特科技有限公司 | Projection screen and projection system |
| CN110824826A (en) * | 2019-12-21 | 2020-02-21 | 成都菲斯特科技有限公司 | Projection screen and projection system |
| CN111025839A (en) * | 2020-01-09 | 2020-04-17 | 成都菲斯特科技有限公司 | Orthographic projection screen and projection system |
-
2020
- 2020-07-28 CN CN202010733659.3A patent/CN111624844B/en active Active
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