Projection screen and projection equipment

Abstract

The invention discloses a projection screen and projection equipment, relates to the technical field of projection display, and is used for solving the problem that the light convergence effect of an existing projection screen is poor. The projection screen comprises a conductive structure, a microstructure layer and an adjusting solution. A plurality of micro-structure cavities are formed in the micro-structure layer, and the adjusting solution is filled in the plurality of micro-structure cavities. Wherein the adjusting solution comprises conductive liquid and reflecting liquid which are incompatible with each other. A reflecting surface is formed on the reflecting liquid and used for reflecting the projection light. The conductive structure is used for applying different voltages to the adjusting solutions in the different micro-structure cavities, so that the reflecting solutions in the different micro-structure cavities move relative to the adjusting solutions to form a reflecting surface. The inclination angles and the inclination directions of the different reflecting surfaces relative to the surface of one side of the projection screen are different, so that part of projection light projected to the plurality of reflecting surfaces is converged to the same observation point. The projection screen is used for reflecting a projection picture.

Description

Technical Field

[0001] The present application relates to the field of projection display technology, and in particular to a projection screen and a projection device. Background Art

[0002] In the field of projection display technology, projectors are generally used in conjunction with projection screens. The light emitted by the projector is projected onto the projection screen, and after being reflected by the projection screen, it reaches the audience's eyes, and the audience can then see the image formed by the light on the surface of the projection screen.

[0003] In order to improve the projection effect of the projection screen, the projection screen generally includes a Fresnel lens layer, which can converge light and thus improve the gain of the projection screen.

[0004] However, the existing Fresnel lens layer has a poor light focusing effect and cannot meet the needs of users. Summary of the invention

[0005] The present application provides a projection screen and a projection device, which are used to solve the problem that the light convergence effect of the existing projection screen is poor.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] On the one hand, an embodiment of the present application provides a projection screen, including a conductive structure, a microstructure layer and a regulating solution. A plurality of microstructure cavities are formed inside the microstructure layer, and the regulating solution is filled in the plurality of microstructure cavities. The regulating solution includes a conductive liquid and a reflective liquid that are incompatible with each other. The reflective liquid forms a reflective surface for reflecting projection light. The conductive structure is used to apply different voltages to the regulating solutions in different microstructure cavities, so that the reflective liquids in different microstructure cavities move relative to the regulating liquid to form reflective surfaces. The different reflective surfaces have different inclination angles and inclination directions relative to the surface of one side of the projection screen, so that parts of the projection light projected onto the multiple reflective surfaces converge to the same observation point.

[0008] The projection screen provided in the embodiment of the present application is a projection screen in which the light projected by the projector enters the interior of the projection screen and passes through the reflective liquid. The light is reflected by the reflective liquid and is emitted from the projection screen to the human eye toward the side where the projector is located, so as to form a projection image on the projection screen.

[0009] Since the conductive structure can apply different voltages to the adjustment solutions in different microstructure cavities, the reflective liquid moves relative to the conductive liquid to form reflective surfaces with different inclination angles and inclination directions relative to the surface of one side of the projection screen. In this way, the reflective surfaces at various positions of the projection screen can converge part of the projection light projected onto the reflective surfaces to the same observation point, and the light convergence effect is better.

[0010] In some embodiments, multiple microstructure cavities are arranged in multiple rows along the first direction, and each row has multiple microstructure cavities arranged along the second direction, wherein the first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are parallel to a surface of one side of the projection screen.

[0011] In some embodiments, the projection light projected onto the center of the reflective surface formed by the reflective liquid in each microstructure cavity is reflected and converged to the observation point.

[0012] In some embodiments, along a direction perpendicular to a surface of one side of the projection screen, a thickness of the microstructure cavity is equal to or greater than 3 um and less than or equal to 100 um.

[0013] In some embodiments, the size of the microstructure cavity along the third direction is equal to or greater than 10 um and less than or equal to 200 um, wherein the third direction is parallel to a surface of one side of the projection screen.

[0014] In some embodiments, along a direction perpendicular to a surface of one side of the projection screen and close to the observation point, a size of the microstructure cavity along a third direction gradually increases; wherein the third direction is parallel to the surface of one side of the projection screen.

[0015] In some embodiments, the shapes of the plurality of microstructure cavities are the same.

[0016] In some embodiments, the shape of the microstructure cavity is one of a pyramid, a cone, a truncated pyramid, a frustum, and a hemisphere.

[0017] In some embodiments, the conductive structure includes a first electrode layer and a second electrode layer. The first electrode layer is stacked on one side of the microstructure layer. The second electrode layer is stacked on a side of the microstructure layer away from the first electrode layer. The first electrode layer and the second electrode layer each include a plurality of electrodes to apply different voltages to the regulating solutions in different microstructure cavities.

[0018] In some embodiments, when the conductive structure does not apply an electrode to the adjustment solution, along the projection direction of the projection light, the conductive liquid is located on a side of the reflective liquid close to the observation point.

[0019] On the other hand, an embodiment of the present application provides a projection device, comprising a projector and any one of the above-mentioned projection screens. The projector is located at one side of the projection screen and is used to emit projection light toward the projection screen.

[0020] Since the projection device provided in the embodiment of the present application includes any of the above-mentioned projection screens, it can solve the same technical problems as the above-mentioned projection screens and achieve the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a Fresnel lens layer in the related art;

[0022] Figure 2 A schematic diagram of the optical path of the projection light reflected by the Fresnel lens layer in the related art;

[0023] Figure 3 A schematic diagram of a planar structure of a Fresnel lens layer in the related art;

[0024] Figure 4 A schematic diagram of the use status of the projection device provided in the embodiment of the present application;

[0025] Figure 5 A schematic diagram of a partial structure of a projection screen provided in an embodiment of the present application;

[0026] Figure 6 It is a schematic diagram of the structure after the conductive structure applies voltage to the regulating solution;

[0027] Figure 7 A schematic diagram of the structure of the microstructure layer provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the structure of another microstructure cavity provided in an embodiment of the present application;

[0029] Fig. 9 This is a schematic diagram of the structure when the light projected by the projector is reflected by the microstructure layer to the observation point;

[0030] Fig.10 Schematic diagram of the structure when the incident light enters the adjustment solution.

[0031] Reference numerals:

[0032] 010-Fresnel lens layer; 011-Fresnel microstructure;

[0033] 100-projection TV; 1-projection screen; 11-conductive structure; 111-first electrode layer; 112-second electrode layer; 12-microstructure layer; 121-microstructure cavity; 13-adjusting solution; 131-conductive liquid; 132-reflective liquid; 2-projector; 21-incident light; 22-outgoing light; 3-audience. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] In the description of the present application, it should be understood that the terms, "up", "down", "left", "right", "front", "back", "inside", "outside", "center", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0037] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "multiple" means two or more.

[0038] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0039] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0040] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0041] In the field of projection display technology, especially in the field of ultra-short-throw laser projection display, in order to achieve better brightness and display effects, the projector can be used with a projection screen with a Fresnel lens layer, so that the projection screen has a certain ability to resist ambient light and enhance the user's viewing experience.

[0042] The key to the Fresnel lens layer lies in the processing and design of the Fresnel microstructure, such as Figure 1 As shown, Figure 1 The structure diagram of a Fresnel lens layer 010 of the related art is shown in FIG. 010 . The Fresnel lens layer 010 has a plurality of Fresnel microstructures 011 . The plurality of Fresnel microstructures 011 are a plurality of circular ring structures arranged concentrically. When the projection light passes through the Fresnel microstructures 011 , the light will converge toward the center under the action of the Fresnel microstructures 011 , so that the position facing the projection screen 1 has a better viewing effect.

[0043] Knowable, such as Figure 1 As shown, a single annular Fresnel microstructure 011 is distributed at different positions of the Fresnel lens layer 010, and the inclination angles of the inclined surfaces of the Fresnel microstructure 011 for reflecting light at various positions are generally the same.

[0044] However, the incident angles of the projection light projected onto the Fresnel lens layer 010 at different positions are different. Only a portion of the projection light projected onto the same Fresnel microstructure 011 can be reflected to the central area where the audience is watching, and most of the projection light will converge onto a larger plane. The overall convergence effect of the projection light is poor, and the picture effect cannot reach the best.

[0045] like Figure 2 As shown, Figure 2 Schematic diagram of the optical path of the projection light reflected by the Fresnel lens layer 010 in the related art, the projection light a1 projected onto the central axis position of the Fresnel lens layer 010 can be reflected to the center point O. However, the projection light a2 projected onto the position outside the central axis of the Fresnel lens layer 010 cannot be reflected to the center point after reflection, and the light path after reflection deviates far from the center point O, and the light convergence effect is poor.

[0046] Specifically, Figure 3 As shown, Figure 3 The schematic diagram of the plane structure of a Fresnel lens layer 010 in the related art is shown in FIG. The Fresnel lens layer 010 is rectangular in shape as a whole, and the surface of one side of the Fresnel lens layer 010 is divided into nine rectangular areas of the same size. The size of the Fresnel lens layer 010 is 80 inches.

[0047] Next, the center point of each rectangular area is selected as the measurement point to test the angle relationship between the projection light projected to the above nine points by a projector with a projection ratio of 0.25 and an eccentricity of 145% and the light reflected when it is reflected to the center point O.

[0048] After testing, the projection light is projected to Figure 3 The relationship between the actual reflected light after the nine points and the angle when reflected to the center point O is shown in Table 1.

[0049] Table 1

[0050] P1 P2 P3 3.76° 0° 3.76° P4 P5 P6 7.43° 0° 7.43° P7 P8 P9 12.11° 0° 12.11°

[0051] from Figure 3 It can be seen from the data in Table 1 that the projection light projected onto the point on the central axis of the Fresnel lens layer 010 can be reflected to the central point O. However, the projection light projected onto other positions outside the central axis of the Fresnel lens layer 010 deviates from the central point O after reflection, and the light convergence effect is poor.

[0052] Based on this, the present application embodiment provides a projection device 100, see Figure 4 , Figure 4 The following is a schematic diagram of the use state of the projection device 100 provided in the embodiment of the present application. The projection device 100 may include a projection screen 1 and a projector 2. The projector 2 is located at one side of the projection screen 1 and is used to project projection light toward the projection screen 1.

[0053] like Figure 4 As shown, when the projection device 100 is in use, the projector 2 can be placed in front of and below the projection screen 1, and the audience 3 is located in front of the projection screen 1 and looks at the projection screen 1. The incident light 21 emitted by the projector 2 is directed toward the projection screen 1, and the incident light 21 is reflected by the projection screen 1 and finally forms an outgoing light 22 that is directed toward the audience 3, while forming an image on the projection screen 1.

[0054] Figure 4 The projector 2 shown may include a laser, which may be one of a monochromatic laser, a two-color laser, and a three-color laser. The three-color laser may emit a blue laser, a red laser, and a green laser. The wavelength range of the blue laser emitted by the laser may be set to 430nm-460nm, the wavelength range of the green laser emitted may be set to 500nm-540nm, and the wavelength range of the red laser emitted may be set to 610nm-650nm.

[0055] Since the three-color laser has the advantages of color authenticity and high color gamut, the laser in the projector 2 provided in the embodiment of the present application can be a three-color laser. Of course, the laser in the projector 2 provided in the embodiment of the present application can also be a monochromatic laser or a two-color laser.

[0056] The specific structure of the projection screen 1 provided in the embodiment of the present application is further described below. Figure 5 , Figure 5 The schematic diagram of the partial structure of a projection screen 1 provided in an embodiment of the present application is as follows: The projection screen 1 may include a conductive structure 11 , a microstructure layer 12 , and a regulating solution 13 .

[0057] like Figure 5 As shown, a plurality of microstructure cavities 121 are formed inside the microstructure layer 12, and the adjustment solution 13 is filled in the microstructure cavities 121. The adjustment solution 13 includes a mutually incompatible conductive liquid 131 and a reflective liquid 132. The reflective liquid 132 is used to reflect the projection light.

[0058] Therefore, when the light projected by the projector 2 enters the projection screen 1 and passes through the reflective liquid 132 , it is reflected by the reflective liquid 132 and is emitted from the projection screen to the human eye toward the side where the projector 2 is located, so as to form a projection image on the projection screen 1 .

[0059] It is understandable that in order to make the reflective liquid 132 have a reflective effect, the reflective liquid 132 may include a reflective material. In some embodiments, the reflective liquid 132 may include aluminum, silver, or a combination of aluminum and silver. Since aluminum and silver have good reflective properties, they can better reflect the light projected by the projector 2 and ensure the utilization rate of the projection light.

[0060] Continue to refer to Figure 5 The conductive structure 11 can be used to apply different voltages to the regulating solutions 13 in different microstructure cavities 121, so that the reflective liquid 132 in different microstructure cavities 121 moves relative to the conductive liquid 131 to form a reflective surface.

[0061] like Figure 6 As shown, Figure 6 It is a structural schematic diagram after the conductive structure 11 applies voltage to the regulating solution 13. The relative positions of the reflective liquid 132 and the conductive liquid 131 change under the voltage of the conductive structure 11, thereby changing the relative positions of the reflective liquid 132 and the conductive liquid 131 to form reflective surfaces with different angles.

[0062] The different reflection surfaces have different inclination angles and inclination directions relative to the surface of one side of the projection screen 1, so that part of the projection light projected onto the multiple reflection surfaces converges to the same observation point. The surface of one side of the projection screen 1 may refer to the surface of the projection screen 1 close to or away from the projector 2.

[0063] Therefore, in the projection screen 1 provided in the embodiment of the present application, the conductive structure 11 can apply different voltages to the adjustment solution 13 in different microstructure cavities 121, so that the reflective liquid 132 moves relative to the conductive liquid 131 to form reflective surfaces with different inclination angles and inclination directions relative to the surface of one side of the projection screen 1. In this way, the reflective surfaces located at various positions of the projection screen 1 can converge part of the projection light projected onto the reflective surfaces to the same observation point, and the light convergence effect is better.

[0064] It is understandable that in order to keep the conductive liquid 131 and the reflective liquid 132 relatively fixed in the microstructure cavity 121 , the conductive liquid 131 and the reflective liquid 132 may completely fill the microstructure cavity 121 .

[0065] In addition, it can be understood that the vertical projection of the observation point on the projection screen 1 can be located at the center of the projection screen 1. In this way, the projection light will converge to a position directly facing the projection screen 1.

[0066] In some embodiments, Figure 5 As shown, the conductive structure 11 may include a first electrode layer 111 and a second electrode layer 112. The first electrode layer 111 may be stacked on one side of the microstructure layer 12, and the second electrode layer 112 may be stacked on the other side of the microstructure layer 12 away from the first electrode layer 111. The first electrode layer 111 and the second electrode layer 112 each include a plurality of electrodes.

[0067] Therefore, different voltages can be applied to the regulating solutions 13 in different microstructure cavities 121 through the multiple electrodes of the first electrode layer 111 and the second electrode layer 112, so that the reflective liquid 132 in the regulating solution 13 can form reflective surfaces at different angles relative to the conductive liquid 131, so that part of the projection light projected onto different reflective surfaces can be partially converged to the observation point.

[0068] In the projection screen 1 provided in the embodiment of the present application, the arrangement of the plurality of microstructure cavities 121 formed by the microstructure layer 12 may be different. In some embodiments, for example Figure 7 As shown, Figure 7The schematic diagram of the structure of the microstructure layer 12 provided in the embodiment of the present application shows that along the first direction X, a plurality of microstructure cavities 121 are arranged in a plurality of rows, and each row has a plurality of microstructure cavities 121 arranged along the second direction Y. The first direction X and the second direction Y are perpendicular to each other, and both the first direction X and the second direction Y are parallel to the surface of one side of the projection screen 1.

[0069] It is understandable that the shape of the projection screen 1 is generally rectangular. Figure 7 As shown, the shape of the microstructure layer 12 is also rectangular. Therefore, the first direction X can be the width direction of the microstructure layer 12, and the second direction Y can be the length direction of the microstructure layer 12.

[0070] like Figure 7 As shown, part of the microstructure cavity 121 is located outside the central axis of the microstructure layer 12. At this time, the projection light projected into the microstructure cavity 121 located outside the central axis can also be reflected to the observation point, and the light convergence effect is better.

[0071] Through the above arrangement, multiple microstructure cavities 121 are located at different positions of the microstructure layer 12, and part of the projection light projected onto the reflective liquid 132 in the microstructure cavity 121 at each position can be converged to the observation point, ensuring the light convergence effect of the projection screen 1.

[0072] Of course, the multiple microstructure cavities 121 may also be arranged in other ways. For example, in other embodiments, the multiple microstructure cavities 121 may also be arranged as multiple arcs with a center of a circle, and each arc corresponds to a plurality of microstructure cavities 121. In this case, the multiple microstructure cavities 121 provided in the embodiment of the present application are equivalent to dividing each existing Fresnel microstructure into multiple parts, and each part corresponds to a reflective surface with different tilt directions and tilt angles.

[0073] In this way, the microstructure layer 12 provided in the embodiment of the present application has reflective surfaces with different inclination angles and inclination directions at different positions corresponding to a Fresnel microstructure. When the projection light is projected onto different reflective surfaces, part of the projection light can converge to the observation point, and the light convergence effect is better.

[0074] In some embodiments, the projection light projected to the center of the reflective surface formed by the reflective liquid 132 in each microstructure cavity 121 is reflected and converged to the observation point. At this time, the projection light projected to other positions of the reflective surface will be better gathered at the position near the observation point after reflection, and the light convergence effect is better.

[0075] Based on the above scheme, when applying voltage to the adjusting solution 13 to form a reflecting surface, the inclination angle and inclination direction corresponding to the projection light projected by the projector 2 and reflected to the observation point after passing through the center position of the reflecting surface can be calculated first, and then the voltage can be applied to the adjusting solution 13 according to the above inclination angle and inclination direction to obtain the above reflecting surface.

[0076] Of course, in other embodiments, the projection light projected by the projector 2 may also be reflected at other positions of the reflection surface and then converged to the observation point, and the specific selection may be made according to actual conditions.

[0077] In some embodiments, Figure 5 As shown, when the conductive structure 11 does not apply voltage to the adjustment solution 13, along the projection direction of the projection light, the conductive liquid 131 can be located on the side of the reflective liquid 132 close to the observation point.

[0078] In this way, Figure 6 As shown, when the conductive structure 11 applies voltage to the regulating solution 13, the reflective liquid 132 moves relative to the conductive liquid 131, and the reflective liquid 132 close to the conductive liquid 131 can form a reflective surface with different tilt directions and tilt angles.

[0079] In some embodiments, the shapes of the plurality of microstructure cavities 121 may be the same. Thus, when manufacturing the microstructure layer 12, a mold having a single shape may be used for embossing to form the shape of the microstructure cavity 121, which may simplify the structure of the mold and facilitate production.

[0080] For example, when making the microstructure layer 12, the material for making the microstructure layer 12 can be first coated on the substrate, and then the surface of one side of the microstructure layer 12 can be embossed with a mold with a corresponding microstructure to form the above-mentioned microstructure cavity 121. Then, the adjustment solution 13 can be filled in the microstructure cavity 121, and finally a layer of material can be coated on the surface of the side where the microstructure cavity 121 is formed to encapsulate the microstructure cavity 121 to complete the production of the microstructure layer 12.

[0081] In some embodiments, reference Figure 5 , along the direction perpendicular to the surface of one side of the projection screen 1 (i.e. Figure 5 The thickness of the microstructure cavity 121 may be equal to or greater than 3um and less than or equal to 100um. When the thickness of the microstructure cavity 121 is greater than 3um, the reflective liquid 132 in the microstructure cavity 121 may form reflective surfaces with different inclinations under the action of the conductive structure 11. When the thickness of the microstructure cavity 121 is too thin, the angle of the reflective surface that can be formed by the reflective liquid 132 may be limited.

[0082] At the same time, since the thickness of the microstructure cavity 121 is less than 100 um, the thickness of the microstructure cavity 121 is relatively thin, so that the thickness of the entire microstructure layer 12 is relatively thin, thereby meeting the user's thickness requirements for the projection screen 1. It can be understood that when the thickness of the microstructure cavity 121 is thicker, the overall thickness of the projection screen 1 will also increase.

[0083] It is understandable that the thickness of the microstructure cavity 121 can be set according to actual conditions along the direction perpendicular to the surface of one side of the projection screen 1. Exemplarily, the thickness of the microstructure cavity 121 can be 3um, 10um, 20um, 50um or 100um.

[0084] In some embodiments, along the third direction, the size of the microstructure cavity 121 may be equal to or greater than 10 um and less than or equal to 200 um. The third direction is parallel to the surface of one side of the projection screen 1. At this time, the reflective surface formed by the reflective liquid 132 in a single microstructure cavity 121 can better converge the light near the observation point, and the convergence effect is better.

[0085] As can be seen from the above, the light reflected at one point of the reflective surface can be converged to the observation point, and the light reflected at other positions can be converged to a smaller range near the observation point. In this way, when the size of the microstructure cavity 121 along the third direction is large, the volume of the reflective liquid 132 inside it is large, the area of ​​the reflective surface that can be formed is large, and the range of other positions converging near the observation point is also relatively large.

[0086] It is understandable that the size of the microstructure cavity 121 along the third direction can be set according to actual conditions. For example, the size of the microstructure cavity 121 along the third direction can be 10um, 50um, 100um, 150um or 200um.

[0087] In some embodiments, the size of the microstructure cavity 121 along the third direction gradually increases along the direction perpendicular to the surface of one side of the projection screen 1 and close to the observation point. In this way, the volume of the microstructure cavity 121 is relatively small, so that the amount of the adjustment solution 13 filled in the microstructure cavity 121 can be small, and the material consumption of the adjustment solution 13 can be reduced.

[0088] In some embodiments, the shape of the microstructure cavity 121 can be one of a pyramid, a cone, a prism, a truncated cone, and a hemisphere. When the shape of the microstructure cavity 121 is one of the above shapes, the overall shape of the microstructure cavity 121 is relatively simple, and production and manufacturing are more convenient. Of course, the shape of the microstructure cavity 121 can also be other shapes, which can be designed according to actual needs.

[0089] For example, Figure 5 and Figure 6 As shown, the cross-sectional shape of the microstructure cavity 121 cut by a plane perpendicular to the surface of one side of the projection screen 1 may be a triangle. In this case, the microstructure cavity 121 may be conical or pyramidal. Figure 8 As shown, Figure 8 This is a schematic structural diagram of another microstructure cavity 121 provided in an embodiment of the present application. The microstructure cavity 121 may also be conical.

[0090] When the microstructure cavity 121 is pyramid-shaped, the microstructure cavity 121 may also have different shapes, such as Figure 7 As shown, the cross-section of the microstructure cavity 121 cut by a plane parallel to the surface of one side of the projection screen 1 may be a hexagonal shape. In this case, the microstructure cavity 121 may be a hexagonal cone.

[0091] In some embodiments, the projection screen 1 may further include a surface layer (not shown). The projector 2 is located on the side where the surface layer of the projection screen 1 is located, and emits light toward the projection screen 1. The light passes through the interior of the projection screen 1 and is re-emitted from the surface layer.

[0092] The surface layer can be used to protect the projection screen 1, so that the projection screen 1 is not easily damaged. The surface layer can be made of a hard material to form a hard protective layer. For example, the surface layer can be made of methyl methacrylate-styrene copolymer (MS) material.

[0093] Of course, in other embodiments, the surface layer can also be made of flexible materials so that the projection screen 1 can be rolled up for easy transportation. Exemplarily, the surface layer can also be made of UV glue.

[0094] In some embodiments, the projection screen 1 may further include a coloring layer. Dark dye is distributed in the coloring layer. When external ambient light passes through the coloring layer, it will be absorbed by the dark dye, thereby improving the contrast of the projection screen 1.

[0095] The following is an exemplary description of the inclination angle and inclination direction of the reflective surface formed by the reflective liquid 132 at various positions in the microstructure layer 12 provided in the embodiment of the present application. Fig. 9 As shown, Fig. 9 It is a structural schematic diagram when the light projected by the projector 2 is reflected by the microstructure layer 12 to the observation point O, the size of the microstructure layer 12 is l*w, the projection ratio of the projector 2 is TR, the eccentricity is offset, the observation point O is arranged relative to the center of the microstructure layer 12, and the vertical distance from the microstructure layer 12 is 3*w.

[0096] Therefore, the horizontal distance D from the projector 2 to the microstructure layer 12 is l*TR, and the vertical distance H from the projector 2 to the microstructure layer 12 is (offset-1)*w / 2. A coordinate system is established with the coordinates of the projector 2 as (0, 0, D), and the coordinates of the observation point O are (0, H+w / 2, 3w).

[0097] The distance between the point with coordinates (x, y, z) on the surface of the microstructure layer 12 and the projector 2

[0098] The direction vector of the incident light 21 projected by projector 2 to the point is Among them, I x =x / L; I y =y / L;I z =(zD) / L.

[0099] like Fig.10 As shown, Fig.10 1 is a schematic diagram of the structure when the incident light 21 enters the adjustment solution 13. When the incident light 21 reaches the microstructure layer 12, it first enters the interior of the conductive liquid 131, then reaches the reflective liquid 132 for reflection, and finally exits the microstructure layer 12 from the conductive liquid 131. The refractive index of the conductive liquid 131 is n.

[0100] Therefore, the direction vector of the incident light 21 after entering the conductive liquid 131 is Among them, IM x = x / (L*n); IM y =y / (L*n);

[0101] If the reflected light is reflected to the observation point O, the direction vector of the outgoing light is in,

[0102]

[0103]

[0104]

[0105] The direction vector of the outgoing light in the conductive liquid 131 is Among them, RM x =R x / n;RM y =R y / n;

[0106] Therefore, according to as well as The direction vector perpendicular to the reflection surface formed by the reflection liquid 132 can be calculated. in,

[0107]

[0108]

[0109]

[0110] Therefore, the inclination angle and inclination direction of the reflective surface formed by the reflective liquid 132 can be calculated according to S, and then a voltage can be applied to the adjustment solution 13 through the conductive structure 11 to form a reflective surface with the above inclination angle and inclination direction.

[0111] It is understandable that the way in which the conductive structure 11 applies voltage to the adjustment solution 13 can be determined according to actual conditions, as long as different voltages can be applied to different adjustment solutions 13 to form reflective surfaces with different tilt angles and tilt directions.

[0112] In addition, it can be understood that the projection screen 1 provided in the embodiment of the present application can form a reflective surface with different tilt angles and tilt directions because the conductive structure 11 can apply different voltages to the adjustment solution 13. In this way, for projectors 2 with different projection ratios and off-axis, the voltage applied by the conductive structure 11 can be adjusted according to the situation to adapt to different types of projectors 2.

[0113] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A projection screen, characterized in that: include: Conductive structure; A microstructure layer, wherein a plurality of microstructure cavities are formed inside the microstructure layer; as well as, Adjusting the solution to fill the plurality of microstructure cavities; Wherein, the regulating solution comprises: Conductive fluid; and, A reflective liquid, which is incompatible with the conductive liquid and is used to reflect the projection light; Among them, the conductive structure is used to apply different voltages to the regulating solutions in different microstructure cavities, so that the reflective liquids in different microstructure cavities move relative to the conductive liquid to form reflective surfaces; different reflective surfaces have different inclination angles and inclination directions relative to the surface of one side of the projection screen, so that part of the projection light projected onto multiple reflective surfaces is reflected and converged to the same observation point.

2. The projection screen according to claim 1, characterized in that: Along the first direction, the plurality of microstructure cavities are arranged in a plurality of rows, and each row has a plurality of the microstructure cavities arranged along the second direction; The first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are parallel to a surface of one side of the projection screen.

3. The projection screen according to claim 1, characterized in that: The projection light projected onto the center position of the reflection surface formed by the reflection liquid in each microstructure cavity is converged to the observation point after being reflected.

4. The projection screen according to claim 1, characterized in that Along a direction perpendicular to a surface of one side of the projection screen, a thickness of the microstructure cavity is equal to or greater than 3 um and less than or equal to 100 um.

5. The projection screen according to claim 1, characterized in that: The size of the microstructure cavity along the third direction is equal to or greater than 10 um and less than or equal to 200 um; wherein the third direction is parallel to the surface of one side of the projection screen; and / or, Along a direction perpendicular to the surface of one side of the projection screen and away from the observation point, the size of the microstructure cavity along a third direction gradually decreases; wherein the third direction is parallel to the surface of one side of the projection screen.

6. The projection screen according to any one of claims 1 to 5, characterized in that: The shapes of the plurality of microstructure cavities are the same.

7. The projection screen according to claim 6, characterized in that The microstructure cavity has a shape of a pyramid, a cone, a prism, a frustum and a hemisphere.

8. The projection screen according to any one of claims 1 to 5, characterized in that: The conductive structure comprises: A first electrode layer, the first electrode layer is stacked on one side of the microstructure layer; and a second electrode layer, the second electrode layer being stacked and arranged on a side of the microstructure layer away from the first electrode layer; Wherein, the first electrode layer and the second electrode layer each include a plurality of electrodes so as to apply different voltages to the regulating solutions in different cavities of the microstructure.

9. The projection screen according to any one of claims 1 to 5, characterized in that: When the conductive structure does not apply a voltage to the adjustment solution, along the projection direction of the projection light, the conductive liquid is located on a side of the reflective liquid close to the observation point.

10. A projection device, characterized in that: The invention comprises a projector and the projection screen according to any one of claims 1 to 9; the projector is located at one side of the projection screen, and is used for emitting projection light toward the projection screen.

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