WO2019178982A1 - Écran de projection et système d'affichage par projection - Google Patents

Écran de projection et système d'affichage par projection Download PDF

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Publication number
WO2019178982A1
WO2019178982A1 PCT/CN2018/094512 CN2018094512W WO2019178982A1 WO 2019178982 A1 WO2019178982 A1 WO 2019178982A1 CN 2018094512 W CN2018094512 W CN 2018094512W WO 2019178982 A1 WO2019178982 A1 WO 2019178982A1
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WO
WIPO (PCT)
Prior art keywords
screen
frame
connecting portion
edge
optical screen
Prior art date
Application number
PCT/CN2018/094512
Other languages
English (en)
Chinese (zh)
Inventor
李建军
鲁文生
杨长明
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201810225934.3A external-priority patent/CN108398850A/zh
Priority claimed from CN201810225944.7A external-priority patent/CN108388074A/zh
Priority claimed from CN201810225788.4A external-priority patent/CN108681201B/zh
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Publication of WO2019178982A1 publication Critical patent/WO2019178982A1/fr

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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

Definitions

  • the present disclosure relates to the field of projection display, and more particularly to a projection screen and a projection display system.
  • projection display systems are increasingly used in people's work and life.
  • Laser projection has gradually occupied the market because of its wide color gamut, high brightness and long life.
  • projection screens of projection display systems typically include different types of soft screens and hard screens.
  • the hard screen has a good display effect because of its good optical gain uniformity, color reproduction and flatness.
  • the present disclosure provides a projection screen and a projection display system capable of fixing an optical screen and maintaining a good flatness of the optical screen.
  • Some embodiments of the present disclosure provide a projection screen including an optical screen, a flexible connection, a screen frame disposed on a side of the flexible connection away from the optical screen, and an elastic connector;
  • the first connecting portion of the flexible connecting portion is fixedly connected to the optical screen
  • a second connecting portion of the flexible connecting portion is coupled to the first end of the elastic connecting member, a second end of the elastic connecting member is coupled to the screen frame, and the elastic connecting member is configured to pass the flexible
  • the connecting portion stretches the optical screen to a flat state.
  • FIG. 1 is a schematic structural view of an orthographic projection optical screen in the related art
  • FIG. 2 is a schematic structural view of a back plate type fixing structure in the related art
  • FIG. 3 is a schematic structural diagram of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 4 is a schematic exploded view of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 5 is a schematic cross-sectional view of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 6 is a partial schematic structural diagram of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 7 is a schematic diagram of a back structure of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 8 is a schematic structural diagram of an elastic connecting member in a projection screen provided by some embodiments of the present disclosure.
  • FIG. 9 is another partial structural diagram of a projection screen provided by some embodiments of the present disclosure.
  • Figure 10 is a schematic view showing the installation of the screen frame of Figure 9;
  • FIG. 11 is a schematic structural diagram of a support member of a projection screen provided by some embodiments of the present disclosure.
  • FIG. 12A is a partial exploded perspective view of another projection screen according to another embodiment of the present disclosure.
  • FIG. 12B is a schematic cross-sectional view of another projection screen provided by other embodiments of the present disclosure.
  • 12C is a partial structural assembly diagram of another projection screen provided by other embodiments of the present disclosure.
  • 13A is a front elevational view of a flexible joint provided by some embodiments of the present disclosure.
  • 13B is a front elevational view of a flexible joint provided by other embodiments of the present disclosure.
  • 13C is a front elevational view of a flexible joint provided by other embodiments of the present disclosure.
  • 13D is a front elevational view of a flexible joint provided by still other embodiments of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a projection display system provided by some embodiments of the present disclosure.
  • the hard curtain generally includes an optical structural layer as shown in FIG. 1 : a colored layer 101, a diffusion layer 102, a Fresnel lens layer 103, a reflective layer 104, and the like.
  • the colored layer 101 is located at the outermost side of the projection screen, and the projected image beam is first incident and finally emerges through the layer.
  • the main function of the colored layer is to improve the color reproduction capability of the projection screen, and sometimes the colored layer 101 can also be used as the substrate layer.
  • the substrate layer includes a colored layer and a hard film layer; the hard film layer mainly serves as a protective layer.
  • the diffusion layer 102 is mainly used for homogenizing incident light to homogenize, and expands the angle of the emitted light; Fresnel lens
  • the layer 103 is used to collimate the incident light beam in a range of angles and divergence the light beam reflected by the reflective layer 104.
  • the reflective layer 104 is typically an aluminum reflective film layer that is plated on the outside of the Fresnel lens layer 103.
  • FIG. 2 is a schematic structural view of a back plate type fixing structure in the related art. As shown in FIG.
  • the back plate type fixing structure includes a decorative frame 201 and a flat rigid back supporting plate 204, and the hard curtain 202 and the rigid back supporting plate 204 are fixed and fixed by the adhesive 203, and then The decorative frame 201 is attached to the edges of the back support plate 204 and the hard curtain 202, thereby completing the support and fixing of the hard curtain 202, so that the flatness of the hard curtain 202 can be maintained by the rigidity of the back support plate 204, and the hard curtain 202 is avoided. Deformation occurs.
  • the fixed screen is fixed by a monolithic back plate type fixing structure.
  • the area of the back supporting plate is large, and when the processing is performed, the large-sized plate is prone to deformation such as a bulge, and at the same time, the optical screen is glued to the back plate. Uneven coating on the sheet will also cause unevenness of the fit, which will affect the flatness of the entire hard screen.
  • this back-plate fixing method also makes the weight of the whole screen very large and is not convenient for transportation. And suspension, which limits the size of the projection size.
  • some embodiments of the present disclosure provide a projection screen including an optical screen 1, a flexible connecting portion 2, a screen frame 3 disposed on a side of the flexible connecting portion 2 away from the optical screen 1, and an elastic connecting member 4;
  • the first connecting portion of the flexible connecting portion 2 is fixedly connected to the optical screen 1, and the second connecting portion of the flexible connecting portion 2 is connected to the first end of the elastic connecting member 4, and the second end of the elastic connecting member 2 and the screen frame 3
  • the elastic connector 4 is configured to stretch the optical screen 1 to a flat state through the flexible joint 2.
  • the flexible connecting portion 2 is made of a soft material, which is soft, but has a certain rigidity, that is, a small elastic modulus, is not easily deformed, and can transmit force.
  • the flexible connecting portion 2 may be a soft cloth, that is, a soft connecting cloth, and a flexible woven fabric may be generally used. The following description will be made by taking a soft connecting cloth as an example.
  • optical screen 1 includes a Fresnel lens layer and a reflective layer.
  • FIG. 5 shows a schematic cross-sectional view of a projection screen provided by some embodiments of the present disclosure. 4 shows an exploded view of a projection screen provided by some embodiments of the present disclosure.
  • the optical screen 1 in the projection screen may be made of a hard material such as glass or plastic, and has a certain rigidity and strength, but there are still some deformations, so that when the optical screen 1 is stretched, a relatively flat surface can be formed.
  • the front side of the optical screen 1 (for example, the side facing the projector) is a projection light receiving surface.
  • at least a partial area of the front side of the optical screen 1 can be used as a light receiving area for projecting an image in order to project a picture and an image on the front side of the optical screen 1 for display.
  • the front surface of the optical screen 1 further includes a front upper edge, a front lower edge, a front left edge, and a front right edge disposed around the light receiving area.
  • the back side of the optical screen 1 refers to the side of the optical screen 1 opposite to the projected light-receiving surface of the optical screen 1.
  • the back surface of the optical screen 1 includes a back surface area opposite to the light-receiving area and is disposed around the back surface area and respectively respectively.
  • the front lower edge, the front left edge, and the front right edge are opposite the upper back edge, the lower back edge, the back left edge, and the back right edge.
  • the projection screen in this embodiment further includes a soft connecting cloth 2, and the connecting cloth 2 can be bonded to the optical screen 1 and connected with other bonding methods. Thereby the fixing of the optical screen 1 is completed.
  • connection cloth 2 and the optical screen 1 are bonded to each other, and thus the degree of stretching of the connecting cloth 2 also affects the curling or unfolding of the optical screen 1.
  • first connection portion of the connection cloth 2 is fixedly coupled to the optical screen 1 so that the back surface of the optical screen 1 can be attached to the first connection portion of the connection cloth 2.
  • the first connection portion of the connection cloth 2 is at least in conformity with the back surface area of the optical screen 1.
  • the connection cloth 2 is of sufficient size to fit at least the back surface area of the optical screen 1.
  • the back surface area is bonded to the first connection portion of the connection cloth 2.
  • the first connecting portion of the connecting cloth 2 may be a portion where the connecting cloth is attached to the back surface of the optical screen 1.
  • the optical screen 1 Since the optical screen 1 is usually vertically suspended when the screen is projected, the optical screen 1 is more likely to sag naturally due to its own weight. At this time, the optical screen 1 mainly causes inward curling or outward on the left and right sides. Zhang's phenomenon.
  • the back surface area, the back upper edge, and the back lower edge of the optical screen 1 may be in contact with the first connection portion of the connection cloth 2.
  • the first connecting portion of the connecting cloth 2 spans the entire optical screen 1 in the vertical direction, so that the upper back edge and the lower back edge of the optical screen 1 can be stretched by the connecting cloth 2, since the optical screen 1 is usually
  • the width in the horizontal direction is larger than the width in the vertical direction, so that the upper and lower sides of the optical screen 1 are reinforced and fixed by the connecting cloth 2, so that the inward curling or the outward stretching of the upper and lower sides can be avoided, and the left and right sides can be simultaneously suppressed.
  • the curling phenomenon causes the entire optical screen 1 to have a good flatness in all directions.
  • the “vertical direction” used in the present disclosure refers to the direction perpendicular to the horizontal plane of the optical screen 1 when the screen is projected
  • the “horizontal direction” refers to the direction of the optical screen 1 parallel to the horizontal plane when the screen is projected.
  • the central portion of the connecting cloth 2 is its first connecting portion 211, and the optical screen 1 can be attached to the central position of the connecting cloth 2, and the second connection of the connecting cloth 2 is attached.
  • the portion 212 extends outwardly from the upper rear edge and the lower rear edge of the optical screen 1 for connection with other structures. It should be understood that "outward" as used in the present disclosure refers to a direction away from the light receiving region of the optical screen 1 on the plane on which the optical screen 1 is projected when the screen is projected.
  • the first connection portion of the connection cloth 2 is attached to the back surface of the entire optical screen 1. That is, the first connecting portion of the connection cloth 2 is in contact with the back surface area, the back upper edge, the back lower edge, the back left edge, and the back right edge of the optical screen 1.
  • the entire optical screen 1 can be attached to the first connecting portion of the connecting cloth 2, so that the optical screen 1 can be stretched and stretched by the stretching of the connecting cloth 2, thereby maintaining better flatness.
  • the central portion of the connecting cloth 2 is its first connecting portion 211, and the optical screen 1 can be attached to the central position of the connecting cloth 2, and the second connection of the connecting cloth 2 is attached.
  • the portion 212 extends outwardly from the upper rear edge, the lower rear edge, the rear left edge, and the rear right edge of the optical screen 1 for connection with other structures.
  • the first connection portion of the connection cloth 2 is only in contact with the upper back edge and the lower back edge of the optical screen 1.
  • the portion of the connecting cloth 2 that is in contact with the upper rear edge and the lower rear edge of the optical screen 1 is its first connecting portion 211, and the second connection of the connecting cloth 2
  • the portion 212 extends outwardly from the upper and lower back edges of the optical screen 1 for attachment to other structures.
  • the first connecting portion of the connection cloth 2 is attached to the back upper edge, the back lower edge, the back left edge, and the back right edge of the optical screen 1 without being opposite to the back of the optical screen 1.
  • the portion of the connecting cloth 2 that is in contact with the upper rear edge, the lower rear edge, the rear left edge, and the rear right edge of the optical screen 1 is the first connecting portion 211.
  • the portion of the first connecting portion 211 corresponding to the back surface region is a through hole 213, and the second connecting portion 212 of the connecting cloth 2 is outward from the back upper edge, the back lower edge, the back left edge, and the back right edge of the optical screen 1. Extend to connect with other structures.
  • the first connection portion of the connection cloth 2 is attached to the back surface of the optical screen 1, and the second connection portion of the connection cloth 2 is from the back upper edge and the lower back edge of the optical screen 1, or Further, the back left edge and the back right edge are bent to the front side of the optical screen 1 to be bonded to the back upper edge and the back lower edge of the optical screen 1, or further, the back left edge and the back right edge. And then protrudes from the back upper edge and the back lower edge of the optical screen 1 in the direction away from the light receiving area of the optical screen 1, or further, the back left edge and the back right edge.
  • the projection screen further includes an elastic connecting member 4, and the elastic connecting member 4 itself has elasticity, so that the first end of the elastic connecting member 4 is fixed at When the second connecting portion of the cloth 2 is connected, and the second end is connected to the screen frame 3 disposed on the side of the first connecting portion of the connecting cloth 2 away from the optical screen 1, the connecting cloth 2 can be connected by its own elasticity.
  • the second connecting portion is expanded to force the second connecting portion of the connecting cloth 2 to open to a flat extended state.
  • the elastic direction of the elastic connecting member 4 is generally a pulling direction, that is, when the elastic connecting member 4 is connected between the second connecting portion of the connecting cloth 2 and the screen frame 3,
  • the elastic connecting member 4 can stretch the second connecting portion of the connecting cloth 2 toward the joint of the screen frame 3 with the second end of the elastic connecting member 4 until the second connecting portion of the connecting cloth 2 is opened to the extended state.
  • the connecting cloth 2 since the first connecting portion of the connecting cloth 2 and the optical screen 1 are bonded to each other and attached together, when the second connecting end of the elastic connecting member 4 and the screen frame 3 are stretched, the connecting cloth 2 is stretched.
  • the optical screen 1 is also stretched outward until the optical screen 1 is stretched to a flat state. At this time, the optical screen 1 can ensure better flatness, so that the picture and the image projected on the front side of the optical screen 1 have a better display effect, and the projection picture is prevented from being skewed and deformed.
  • the projection screen in the embodiment can fix the optical screen 1 through the connecting cloth 2, the elastic connecting member 4 and the screen frame 3, and at the same time, the second connecting fabric 2 can be made by the stretching action of the elastic connecting member 4.
  • the connecting portion is in a stretched state, and the tensile force is also applied to the optical screen 1 by the force transmission, so that the rigid optical screen 1 also exhibits a stretched and unfolded state, which facilitates the flatness of the optical screen 1.
  • the optical screen 1 is a Fresnel optical screen, which may generally be composed of a hard layer, a Fresnel structure layer, a projection layer, etc., having a certain strength and rigidity, and being free in vertical. In the drooping state, it can have a certain verticality so that the optical screen 1 looks flat, but since it still has a certain degree of softness, such as no support or interference by external force, the optical screen 1 cannot achieve the flatness requirement required for display, and the optical screen 1 Unevenness will cause distortion, blurring, uneven brightness, or other degradation problems when the laser projection screen is displayed.
  • connection cloth 2 is used as the connection structure, and the connection cloth 2 can have characteristics of less elasticity, bendability, ultra-thinness, compactness and high strength, so that the first connection portion of the connection cloth 2 is connected.
  • the connecting cloth 2 can generally be a soft cloth. In this way, the connecting cloth 2 can transmit the force better when being stretched, and the property is relatively stable, and can adapt to a wider environment, for example, maintaining a good flatness between ambient temperatures of -10 ° C to 40 ° C. And reliability.
  • the color of the connection cloth 2 may generally be black, such that the connection cloth 2 may cover the back surface area of the optical screen 1 to shield and protect the optical screen 1.
  • the optical screen 1 is an optical structural layer and has a certain light transmittance.
  • the innermost layer is a reflective layer, and the active surface of the reflective layer reflects the projected light (for example, an aluminized film). ), but since 100% reflectivity cannot be achieved, part of the light will pass through, which will cause the image contrast to drop.
  • the back surface of the optical screen 1 specifically, the back surface of the aluminum film is shielded by a black connecting cloth, which is advantageous for preventing light from leaking, and also preventing scratching of the back surface of the screen, etc., for the aluminum film and each optical structural layer. Play a protective role.
  • an adhesive that is, a glue is usually used to achieve the connection and fixation therebetween.
  • the back surface of the optical screen 1 is bonded to the first connecting portion of the connecting cloth 2 by gluing, and no space or gap is left between the back surface of the optical screen 1 and the first connecting portion of the connecting cloth 2, thereby It does not affect the display of the projected picture due to the air flow in the gap between the two (especially the flow of air caused by temperature changes).
  • the attachment may also be accomplished in the form of a Velcro or the like.
  • the adhesive for connecting the first connection portion of the optical screen 1 and the connection cloth 2 has a thermal expansion coefficient similar to or the same as that of the optical screen 1, or has a certain ductility, so that the optical screen 1 is generated due to temperature change.
  • the connecting cloth 2 will play a certain buffering effect, reduce the influence of the optical screen 1 on the projection picture due to thermal expansion and contraction deformation, and also help maintain the flatness of the hard optical screen 1 and prevent Because the expansion coefficients of the two are different, the expansion ratio is different, which causes the optical screen 1 to generate stress and affect the flatness.
  • the screen frame 3 is generally a frame structure, including an upper edge of the frame that is connected end to end, a lower edge of the frame, a left edge of the frame, and a right edge of the frame to form a rectangle or a square. a hollow area that can be used to house the optical screen 1, and the screen frame 3 can be disposed on a side of the first connecting portion 211 away from the optical screen 1, providing protection for the optical screen 1, while the screen frame 3 and the connecting cloth 2 are
  • the second connecting portions are connected by the elastic connecting member 4, and the specific structure and the connecting relationship of the screen frame 3 are as shown in FIG. 3 to FIG. 7, wherein the screen frame 3 on the upper side and the lower side of the optical screen 1 is convenient for description.
  • the structures on the left and right sides of the screen frame 3 also have similar structures and connection relationships with the upper and lower sides, and are not described herein again.
  • connection cloth 2 and the screen frame 3 are connected. 2.
  • the connection cloth is connected. 2.
  • the area of the screen frame 3 may be larger than the projected area of the connection cloth 2, and all or part of the screen frame 3 is located at the second connection portion of the connection cloth 2 outwardly away from the light receiving area of the optical screen 1. Outside.
  • the first end of the elastic connecting member 4 can be connected with the second connecting portion of the connecting cloth 2, and the second end of the elastic connecting member 4 protrudes outward from the second connecting portion of the connecting cloth 2, and is fixed at On the screen frame 3, the connecting cloth 2 can be fixed to the center of the screen frame 3 by means of the elastic connecting member 4, and the second connecting portion of the connecting cloth 2 is stretched by the elastic force of the elastic connecting member 4, so that the connecting cloth 2 is connected. Maintain a flat stretch.
  • the "outer side" used in the present disclosure is a side that points away from the light receiving area of the optical screen 1, that is, at least one of the upper side, the lower side, the left side, and the right side of the projection screen in the normal use state.
  • the elastic connecting member 4 Since the second connecting portion of the connecting cloth 2 is wound from the front surface of the screen frame to the side of the screen frame, the first end of the elastic connecting member 4 is connected to the second connecting portion of the connecting cloth 2, and the second end of the elastic connecting member 4 is fixed.
  • the outer side of the second connecting portion of the connecting cloth 2 will wrap a part of the screen frame 3, so that the outer side of the back surface area of the optical screen 1 of the projection screen away from the optical screen 1 needs to have a wider bezel area to accommodate the connection.
  • the elastic connecting member 4 may be disposed at other positions to reduce the size of the area of the front surface of the optical screen 1 of the projection screen 4 and the screen frame 3.
  • the screen frame 3 may include a support surface which is a side of the screen frame 3 facing the optical screen 1, and the screen frame 1 further includes a side surface and a fixing elastic connecting member
  • the fixing surface of the fixed surface is the surface of the screen frame 3 away from the optical screen 1
  • the side surface is the surface connecting the supporting surface and the fixing surface on the outer side of the screen frame 3.
  • the second connecting portion of the connecting cloth 2 is wound along the side to the fixing surface. And connected to the elastic connecting member 4 fixed on the fixing surface.
  • the area of the supporting surface is larger than the projected area of the optical screen 1, and thus the supporting surface of the screen frame 3 and the first connecting portion of the connecting cloth 2 are away from the optical One side of the screen 1 is attached.
  • the second connecting portion of the connecting cloth 2 is located on the back upper edge, the back lower edge, the back left edge and the back right edge of the optical screen 1, and can continue to protrude outward, and The side of the screen frame 3 is wound around the fixing surface, the side of the screen frame 3 is wrapped, and then connected to the elastic connecting member 4 fixed to the fixing surface.
  • the second connecting portion of the connecting cloth 2 is equivalent to being wrapped on the side of the screen frame 3, and the side of the screen frame 3 can support the second connecting portion of the connecting cloth 2 as a supporting point.
  • the side surface of the screen frame 3 can be equivalent to a fixed pulley, so that the supporting surface of the screen frame 3 and the second connecting portion of the connecting cloth 2 on the fixing surface move in two different directions by the support of the side, when When the elastic connecting member 4 applies a pulling force away from the side surface to the second connecting portion of the connecting cloth 2 on the fixing surface, the second connecting portion of the connecting cloth 2 on the supporting surface is pulled in the reverse direction and is close to the side. The direction moves, which results in stretching and stretching.
  • the side of the screen frame 3 can be a flat surface, which in some embodiments is a curved side.
  • the position of the elastic connecting member 4 is no longer limited to the outside of the second connecting portion of the connecting cloth 2, but can be set at The coverage of the connecting cloth 2 is extended.
  • the first end of the resilient connector 4, that is, the end that is coupled to the second attachment portion of the attachment tab 2 may be closer to the side of the screen frame 3 than the second end of the resilient connector 4.
  • the elastic connecting member 4 can be hidden in the back direction of the optical screen 1, so that the elastic connecting member 4 is shielded by the front optical screen 1 and the connecting cloth 2, which is difficult to see from the front side of the projection screen.
  • the area of the back upper edge, the back lower edge, the back left edge and the back right edge of the optical screen 1 no longer has the elastic connecting member 4, but only the second connecting portion of the connecting cloth 2 and the screen frame. 3, so the formed border area has a small width, which can effectively enhance the appearance of the projection screen.
  • the optical screen 1 is generally composed of a hard material, thermal expansion and contraction occurs when the temperature of the external environment changes.
  • the optical screen 1 is inflated and contracted, if the back upper edge, the back lower edge, the back left edge, and the back right edge of the optical screen 1 exceed the side of the screen frame 3, a phenomenon such as bumping may occur.
  • the side of the screen frame 3 is usually located on the back upper edge, the back lower edge, the back left edge and the back right edge of the screen panel 1. At this time, the screen frame 3 can provide sufficient positioning and protection for the optical screen 1 when the external environment changes.
  • the pulling direction of the elastic connecting member 4 can be kept parallel or nearly parallel to the plane in which the optical screen 1 is located. This can bring two advantages: on the one hand, the overall volume and thickness of the projection screen can be reduced, and when the elastic connecting member 4 is elastically deformed, the direction of the elastic deformation is located in the plane of the optical screen or is compared with the plane.
  • the second connection of the elastic connecting member 4 and the connecting cloth 2 is different depending on the type and structure of the elastic connecting member 4.
  • the screen frame 3 is a rigid body, it can be connected with the elastic connecting member 4 by a common fixing manner such as a snap connection, a threaded fastener connection or a riveting.
  • the connecting cloth 2 is made of a relatively soft material and is inconvenient to be directly connected to the elastic connecting member 4, it is usually required to fix a rigid connecting structure on the second connecting portion of the connecting cloth 2, and connect the connecting structure by using the connecting structure.
  • the second connecting portion of the cloth 2 is coupled to the elastic connecting member 4.
  • the projection screen includes a rigid fixture 21 that is secured to the second attachment portion of the attachment cloth 2 and that is coupled to the first end of the resilient connector 4.
  • the end of the second connecting portion of the connecting cloth 2 can be enclosed in a closed shape, so that the rigid fixing member 21 can be fixed inside the closed shape, This achieves a fixation between the rigid fixing member 21 and the second connecting portion of the connecting cloth 2.
  • the rigid fixture 21 can be of a variety of different shapes and configurations, such as a straight rod-like structure, such as a crossbar.
  • the second connecting portion of the connecting cloth 2 can be curled inwardly and sewn together with the inner side of the second connecting portion of the connecting cloth 2, so that the second connecting portion of the connecting cloth 2 can be formed with a closed hole.
  • a rigid fixing member 21 for a straight rod shape is bored therein.
  • the rigid connecting member 21 Since the second connecting portion of the connecting cloth 2 can be connected to the elastic connecting member 4 through the rigid fixing member 21, the rigid connecting member 21 is used to carry the force, and the second connecting portion of the connecting cloth 2 is less likely to be torn or damaged, and the phase is Compared to directly attaching to the connecting cloth 2, such as a hole or a ring, since the number of the elastic connecting members 4 is limited, the rigid fixing member 21 can exert a tensile force on the finite number of elastic connecting members 4 over the entire rigid fixing member 21.
  • the rigid fixing member 21 is a rigid bar structure, and may be selected from glass fiber or metal material, and is not easily deformed by force.
  • a through hole may be provided at a portion of the second connecting portion of the connecting cloth 2 near the elastic connecting member 4, and a metal ring may be disposed at an inner edge of the through hole to facilitate the elastic connecting member 4 and the connecting cloth 2
  • the fixing of the second connecting portion slows the wear of the connecting cloth 2 at the connection position with the elastic connecting member 4.
  • the elastic connecting member 4 in order to connect the rigid fixing member 21, the elastic connecting member 4 may generally be a pulling spring, and the first end of the pulling spring may be connected to the rigid fixing member 21 in a hanging manner or the like.
  • the second end of the spring is fixed to the screen frame 3.
  • the first end of the pull-up spring that is coupled to the rigid fixture 21 can be a hook or a loop to hang up with the rigid fixture 21.
  • the elastic connecting member 4 can also be an elastic connecting structure commonly used by those skilled in the art such as a rubber body, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of an elastic connecting member in a projection screen provided by some embodiments of the present disclosure.
  • the side of the pull-out spring may be provided with a tension ring 41 for hooking foreign objects.
  • the operator can perform the loading/unloading or stretching operation of the tension spring by inserting a hand or other object into the tension ring 41, thereby facilitating the assembly between the tension spring and the rigid fixing member 21 and the screen frame 3 or Disassembly operation.
  • each of the rigid fixing members 21 may be correspondingly coupled to the plurality of elastic connecting members 4.
  • the rigid fixing member 21 is a cross bar
  • a plurality of elastic connecting members 4 can be connected to each cross bar, and the plurality of elastic connecting members 4 are spaced apart from different rod segments on the cross bar, which can effectively simplify the overall projection screen. structure.
  • the rigid fixing members 21 can also be connected to the elastic connecting members 4 in a one-to-one correspondence.
  • the connecting manner is generally applicable to the structure in which the rigid fixing members 21 have a small outer shape such as a closed ring.
  • the elastic connecting member 4 needs to have sufficient tensile strength when fixing and stretching the optical screen 1 to ensure that the optical screen 1 is effectively fixed and has a good flatness.
  • the elastic connecting member 4 itself needs to adopt an elastic material having an adaptive environment cold and heat change, and can be adapted and changed according to changes in ambient temperature or force, and the elastic connecting member 4 is taken as an example for the spring, when the optical screen 1 is 80 inches.
  • the weight of the optical screen 1 is usually 5 kg (the weight of the connecting cloth 2 is light and can be omitted), so that the effective number of turns of the spring can be designed to be 6 turns and the free height is about 23 mm; and when the spring is on the optical screen 1 When fixed, the spring will stretch to 30mm, ie the elongation is 7mm.
  • the optical screen 1 Since the area of the optical screen 1 is large, it is generally required that a plurality of elastic connecting members 4 are stretched together to allow the optical screen 1 and the connecting cloth 2 to be effectively unfolded into a flat state.
  • the elastic connectors 4 are spaced apart and have a suitable arrangement density. In this way, the optical screen 1 can be provided with sufficient indirect tensile force by means of a plurality of elastic connecting members 4, and on the other hand, the elastic connecting member 4 has a suitable number, and the installation of the elastic connecting member 4 can be prevented from being excessively large. difficult.
  • the spacing between adjacent elastic connecting members is about 134 mm, the optical screen 1 can be fixed while ensuring sufficient flatness of the optical screen 1.
  • the frame upper edge, the frame lower edge, the frame left edge, and the frame right edge of the screen frame 34 are spaced apart from each other with a plurality of elastic connecting members 4, such as equidistantly symmetrically disposed, such that optical The upper and lower left and right directions of the screen 1 are subjected to the pulling force of the elastic connecting member 4, so that the optical screen 1 can be effectively stretched in all directions to maintain a flat state.
  • the optical screen 1 itself is a hard optical screen, it is easy to naturally sag due to its own weight when the vertical hanging is set, and the left and right sides of the optical screen 1 may curl inward or outward.
  • the upper edge of the frame of the screen frame 3 and the lower edge of the frame are spaced apart from each other with a plurality of elastic connecting members 4, so that the optical screen 1 is subjected to the upper and lower stretching forces throughout the width of the screen.
  • the upper and lower sides are fixed in the width direction, preventing the upper and lower sides from being inwardly curled or outward due to insufficient fixing force, and due to the optical screen 1
  • the width in the horizontal direction is larger than the width in the vertical direction, and thus the curling phenomenon on the left and right sides can be suppressed at the same time. In this way, the fixing and stretching of the elastic connecting member 4 to the optical screen 1 can be ensured, and the number of the elastic connecting members 4 is small, and the mounting is convenient.
  • the arrangement of the elastic connecting member is applicable to the case where the back surface area, the back upper edge and the back lower edge of the optical screen 1 are in contact with the first connecting portion of the connecting cloth 2, and is also applicable.
  • the case where the first connecting portion of the connecting cloth 2 is in contact with the back surface of the entire optical screen 1 is used.
  • the frame upper edge, the frame lower edge, the frame left edge, and the frame right edge of the screen frame 3 are spaced apart from each other with a plurality of elastic connectors 4, they are disposed at the upper edge of the frame and
  • the elastic connecting member 4 at the lower edge of the frame is disposed at a lower density than the elastic connecting member 4 disposed at the left edge of the frame and the right edge of the frame, such that the elastic connecting member 4 is still wrapped around the screen frame 3, but the screen frame 3
  • the upper edge of the frame and the elastic connecting member 4 at the lower edge of the frame are densely arranged, and the elastic connecting members 4 at the left edge of the frame and the right edge of the frame are relatively sparse, so that the tensile forces on the upper and lower sides of the optical screen 1 are relatively thin.
  • the elastic connecting member 4 thus arranged can still apply appropriate stretching force to all directions of the optical screen 1 in combination with the stretching requirements of the optical screen 1 in different directions, thereby achieving better stretching and fixing effects due to the elastic connecting member. 4
  • the reduction in quantity also brings convenience to the installation.
  • the arrangement of the elastic connecting members 4 is mainly applicable to the connecting cloth 2.
  • the first connecting portion of the connecting cloth 2 is in contact with the back surface area of the optical screen 1, the back upper edge and the back lower edge of the optical screen 1, because the back left edge and the back right edge of the optical screen 1 are not connected to the connecting cloth.
  • the first connecting portion of 2 is fitted, so it is not appropriate to arrange the elastic connecting member 4 at the left edge of the frame and the right edge of the frame.
  • FIG. 9 is another partial structural schematic diagram of a screen frame provided by some embodiments of the present disclosure.
  • Figure 10 is a schematic view showing the mounting of the screen frame of Figure 9. As shown in FIGS.
  • the screen frame 3 has a screen fixing groove 32 provided at least on the back side of the upper edge of the frame of the screen frame 3, including extending horizontally perpendicular to the screen frame.
  • the horizontal portion and the vertical portion extending vertically at an end of the horizontal portion away from the screen frame, the screen frame, the horizontal portion and the vertical portion collectively form a fixed groove 32 that is open on one side.
  • a pylon assembly 5 is disposed on the wall as a wall support member; wherein the pylon assembly 5 includes a support member 51 having a hook end 511 for inserting the screen fixing groove 32 and supporting the screen frame 3, supporting The piece 51 has a variable position in the vertical direction with respect to the wall.
  • the pylon assembly 5 may further include a wall fixing member 52 which may be fixed to a predetermined position on the wall by a fixing bolt or the like, and the wall fixing member 52 may be generally provided with a moving structure in the vertical direction, for example, for example.
  • the bolt 521 is disposed on the wall fixing member 52.
  • the support member 51 is disposed on the vertical bolt 521, and the portion of the vertical bolt 521 below the support member 51 is sleeved with a nut 522, a nut 522 and a vertical bolt.
  • the 521 is screwed together, and when the nut 522 rotates around the vertical bolt 521, the nut 522 can move up and down along the length of the vertical bolt 521, and the support member 51 is moved in the vertical direction with respect to the wall.
  • the screen frame 3 is driven to adjust the height.
  • the screen frame 3 of such a projection screen can be attached to the pylon assembly 5 to achieve relative fixation between the projection screen and the wall.
  • the fixed structure of the optical screen also serves as a wall-hanging structure of the entire projection screen, which can simplify the structure of the projection screen, and is advantageous for reducing the distance or thickness between the projection optical screen and the wall, and at the same time, the optical screen.
  • the integration of the fixed and wall-mounted structure also facilitates the simplification and weight reduction of the entire screen structure, and facilitates the realization of a large-sized projection display.
  • FIG. 11 is a schematic structural view of a support member 51 provided by some embodiments of the present disclosure.
  • the support member 51 may be provided with a plurality of fixing holes 512 arranged at intervals in the vertical direction, so that the setting can be made through the fixing holes 512.
  • a bit bolt (not shown) is used to complete the fixing between the support member 51 and the wall.
  • the body of the support member 51 can also have a variety of different shapes or configurations.
  • the shape of the hook end 511 of the support member 51 matches the shape of the screen securing slot 32 of the screen frame 3.
  • the hook end 511 of the support member 51 may be a rectangle matching the shape of the screen fixing groove 32.
  • the rectangular hanging end 511 has a certain thickness and can be caught in the screen fixing groove 32, and reduces or eliminates the shaking of the hanging end 511 in the screen fixing groove 32, thereby ensuring that the screen frame 3 is effectively fixed.
  • the hooking end 511 of the support member 51 may have a circular arc-shaped sliding surface as shown in FIG.
  • the arc-shaped sliding surface of the hanging end 511 does not coincide with the shape of the groove wall of the screen fixing groove 32, but the holding point Contact or line contact relationship.
  • a certain sliding can be generated along the sliding surface between the hook end 511 of the support member 51 and the screen fixing groove 32, thereby maintaining a relatively flexible relative position.
  • the front surface of the optical screen 1 is further provided with a front decorative frame (not shown) for covering the second connecting portion of the connecting cloth 2,
  • the front decorative frame is connected to the screen frame 3.
  • the front decorative frame can be disposed on the screen frame 3, and the second connecting portion of the connecting cloth 2 exposed on the back upper edge, the back lower edge, the back left edge, and the back right edge of the optical screen 1 is covered to avoid the connection.
  • the cloth 2 is exposed so that the front upper edge, the front lower edge, the front left edge and the front right edge of the optical screen 1 are front decorative frames to effectively enhance the frontal appearance of the projection screen.
  • the front decorative frame and the screen frame 3 have similar structures, and each has a rectangular frame structure.
  • the surface of the front decorative frame may be treated by a surface treatment process such as electroplating, drawing or painting to further enhance the aesthetics.
  • connection manner commonly used by those skilled in the art such as snapping, bonding or threaded fastener connection, may be employed between the front decorative frame and the screen frame 3.
  • the projection screen includes an optical screen, a flexible connecting portion, a screen frame disposed on a side of the flexible connecting portion away from the optical screen, and an elastic connecting member; the first of the flexible connecting portions a connecting portion is fixedly connected to the optical screen; a second connecting portion of the flexible connecting portion is connected to the first end of the elastic connecting member, and a second end of the elastic connecting member is connected to the screen frame,
  • the elastic connector is configured to stretch the optical screen to a flat state through the flexible connecting portion, achieving fixation and positioning between the optical screen and the screen frame, and the optical screen can be flat on the elasticity of the elastic connecting member Stretching state, improving the projection screen display effect.
  • Some embodiments of the present disclosure provide a projection screen that uses a frame-type screen frame to fix an optical screen, and uses a soft connecting material to transmit elastic stretching force to achieve optical screen fixing, and also pulls the optical screen. Stretching and flattening, the fixing and stretching results of the above optical screen reduce the overall weight of the projection screen on the one hand, greatly reduce the material cost, and on the other hand, it is easier to achieve a uniform flatness of the hard optical screen, and the flatness is achieved.
  • the method has the characteristics of self-adaptation, can better adapt to the change of the thermal expansion and contraction of the optical screen, the flatness is easy to maintain, and the practicability is high.
  • the soft webbing does not completely conform to the back side of the entire optical screen.
  • the flexible connecting portion 2 is specifically a soft connecting cloth, the first connecting portion of the connecting cloth 2 and the back upper edge, the back lower edge, the back left edge and the back right edge of the optical screen 1
  • One or more fits, or the first connection portion of the connection cloth 2 is adhered to one or more of the front upper edge, the front lower edge, the front left edge and the front right edge of the optical screen 1,
  • the second connecting portion of the connecting cloth 2 is connected to the elastic connecting member 4.
  • the resilient link 4 is hooked onto the rigid bar by providing a closed end at the second connection of the attachment cloth 2 to receive the rigid bar.
  • the connecting cloth 2 is attached to both the front and the back of the optical screen 1. In the above manner, the connecting cloth 2 does not adhere to the entire back surface of the optical screen 1, and only fits to the front surface of the optical screen 1 or the edge of the back surface.
  • the connecting cloth 2 can be attached to the front and back sides of the optical screen 1 at the same time.
  • the first connecting portion of the connecting cloth 2 is simultaneously attached to the front and back sides of the optical screen 1, in which The first portion 12a is attached to the front surface of the optical screen 1, and the second portion 12b is attached to the back surface of the optical screen 1.
  • the first portion 12a of the first connecting portion is connected to the first portion of the second connecting portion of the connecting cloth 2
  • the second portion 12b of the first connecting portion is connected to the second portion of the second connecting portion
  • the first portion of the second connecting portion is The second portion may be used to connect with the elastic connector 4 or the like, and the first portion 12a and the second portion 12b of the first connecting portion sandwich the second connecting portion of the optical screen therebetween to connect the cloth 2 and the optical screen
  • the connection between 1 is fixed.
  • the first portion 12a and the second portion 12b of the first connection portion of the connection cloth 2 are connected in a "U" shape, and the closed end of the "U" shape is connected to the second connection of the connection cloth 2.
  • the second connecting portion of the connecting cloth 2 can be used for connection with the elastic connecting member 4 or the like, and the first portion 12a and the second portion 12b of the first connecting portion sandwich the second connecting portion of the optical screen therebetween.
  • the connection between the connection cloth 2 and the optical screen 1 is fixed.
  • the first connecting portion of the connecting cloth 2 since the connecting cloth 2 located at the lower edge region of the optical screen 1 has a small force to be received, the first connecting portion of the connecting cloth 2 may be attached only to one side of the optical screen 1. For example, it is attached to the back of the optical screen 1.
  • connection strength between the optical screen 1 and the first connecting portion of the connecting cloth 2 is usually the same as that of the first connecting portion of the connecting cloth 2, whether it is glued with an adhesive or a structure such as a Velcro.
  • the area is proportional.
  • the first connecting portion of the connecting cloth 2 can be normally connected to the front and back sides of the optical screen 1 at the same time, thereby improving the edge and connection of the optical screen 1.
  • the area of the first portion 12a that fits the front surface of the optical screen 1 can be made. It is smaller than the area of the second portion 12b that is attached to the back surface of the optical screen 1.
  • the length of the first portion 12a in the horizontal direction is equal to the length of the front upper edge and/or the front lower edge of the optical screen 1 in the horizontal direction, and the first portion 12a is vertical.
  • the width of the direction is such that it extends in the vertical direction along the front upper edge and/or the front lower edge, and the length of the second portion 12b in the horizontal direction is equal to the back upper edge of the optical screen 1 and/or the lower back edge is horizontal.
  • the length of the second portion 12b in the vertical direction is such that it extends in the vertical direction along the upper edge of the back surface and/or the lower edge of the back surface.
  • the width of the second portion 12b extends in the horizontal direction along the front left edge and/or the front right edge, and the length of the second portion 12b in the vertical direction is equal to the back left edge and/or the back right edge of the optical screen 1 in the vertical direction.
  • the length of the second portion 12b in the horizontal direction is such that it extends in the horizontal direction along the back left edge and/or the back right edge.
  • the first portion 12a of the front surface of the optical screen 1 has a small area, and can form a narrow frame width; and the second portion 12b located at the back of the optical screen 1 can realize a larger connection area and ensure the first connection of the connection cloth 2.
  • a reliable connection between the part and the optical screen 1. In general, it is generally possible to maintain the first portion 12a on the front side of the optical screen 1 at a width of about 10 mm, and the second portion 12b on the back side of the optical screen 1 to maintain a width of about 50 mm.
  • the projection screen may further include a protective cloth that is attached to the back surface area of the optical screen 1. Hehe. This is because the hard optical screen 1 is an optical structural layer and has a certain light transmittance. Especially when it is used as a front projection screen, the innermost layer is a reflective layer, and the active surface of the reflective layer reflects the projected light (for example, Aluminized film), but due to the inability to achieve 100% reflectivity, all of the light will pass through, which will cause the image contrast to drop.
  • the projected light for example, Aluminized film
  • the back surface of the aluminum film can be shielded by a dark (for example, black) protective cloth to facilitate light leakage and prevent optical.
  • the back of the screen 1 is scratched or the like to protect the aluminum film and each optical structure layer.
  • the protective cloth may be of various materials such as a fiber material, a plastic or a material for shading protection commonly used by those skilled in the art.
  • the first portion and the second portion of the second connecting portion of the cloth 2 are joined, or, in the connecting cloth 2
  • the second connecting portion of the connecting cloth 2 is wound along the side of the screen frame 3 toward the fixing surface, and the connecting cloth is connected.
  • the end of the second connecting portion of the second portion is provided with a rigid fixing bar for hooking the elastic connecting member 4 fixed to the fixing surface.
  • the selection and use of the rigid fixed bar can be similar to the foregoing embodiment of the present disclosure, and details are not described herein again.
  • the elastic connecting member is disposed at the upper edge of the frame of the screen frame 3 and at the lower edge of the frame for Connecting the upper and lower screen frames and the upper and lower sides of the optical screen.
  • the elastic connecting members may be distributed around the optical screen or the screen frame.
  • the pieces 4 can be spaced apart and have a suitable arrangement density.
  • the optical screen 1 can be provided with sufficient indirect tensile force by means of a plurality of elastic connecting members 4, and on the other hand, the elastic connecting member 4 has a suitable number, and the projection of the elastic connecting member 4 can be prevented from being excessively large.
  • the installation of the screen is difficult.
  • the optical screen 1 can be fixed while ensuring sufficient flatness of the optical screen 1.
  • the frame upper edge, the frame lower edge, the frame left edge and the frame right edge of the screen frame 3 are spaced apart from each other with a plurality of elastic connecting members 4, for example, respectively arranged at equal intervals in a symmetric direction.
  • the up, down, left, and right directions of the screen panel 1 are subjected to the pulling force of the elastic connecting member 4, so that the optical screen 1 can be effectively stretched in all directions to maintain a flat state.
  • the optical screen 1 itself is a hard optical screen, it is easy to naturally sag due to its own weight when the vertical hanging is set, and the left and right sides of the optical screen 1 may curl inward or outward.
  • the upper edge of the frame of the screen frame 3 and the lower edge of the frame are spaced apart from each other with a plurality of elastic connecting members 4, so that the optical screen 1 is subjected to the upper and lower stretching forces throughout the width of the screen.
  • the upper and lower sides are fixed in the width direction, preventing the upper and lower sides from being inwardly curled or outward due to insufficient fixing force, and due to the optical screen 1
  • the width in the horizontal direction is larger than the width in the vertical direction, and thus the curling phenomenon on the left and right sides can be suppressed at the same time. In this way, the fixing and stretching of the elastic connecting member 4 to the optical screen 1 can be ensured, and the number of the elastic connecting members 4 is small, and the mounting is convenient.
  • the above-mentioned elastic connecting member is arranged in a manner that the upper back edge and the lower back edge of the optical screen 1 are in contact with the first connecting portion of the connecting cloth 2, as shown in FIG. 13A.
  • the connecting cloth 2 can also be applied to the case where the back surface area, the back upper edge and the back lower edge of the optical screen 1 are in contact with the first connecting portion of the connecting cloth 2, as shown in FIG. 13B, the connecting cloth 2 can also be used.
  • the connecting cloth 2 can also be used.
  • the connecting cloth 2 Suitable for the case where the first connecting portion of the connecting cloth 2 is attached to the back surface of the entire optical screen 1, the connecting cloth 2 as shown in FIG. 13C, and even the first connecting portion of the connecting cloth 2 and the optical screen 1
  • the back upper edge, the back lower edge, the back left edge, and the back right edge are fitted together, as shown in Fig. 13D.
  • the upper frame edge, the frame lower edge, the frame left edge, and the frame right edge of the screen frame 3 are spaced apart from each other with a plurality of elastic connectors 4, they are disposed under the frame upper edge and the frame.
  • the elastic connector 4 at the edge is disposed at a lower density than the elastic connector 4 disposed at the left edge of the frame and the right edge of the frame.
  • the elastic connecting member 4 still surrounds the screen frame 3, but the upper edge of the frame of the screen frame 3 and the elastic connecting member 4 at the lower edge of the frame are densely arranged, while the left edge of the frame and the elastic connecting member at the right edge of the frame 4
  • the setting is relatively sparse, so the upper and lower sides of the optical screen 1 are subjected to a large tensile force, which can effectively resist the inward curling or outward tension of the optical screen 1; and the optical screen 1 is vertically sagged due to natural sag.
  • the stress is very small, so the stretching force on the left and right sides of the optical screen 1 is small.
  • the elastic connecting member 4 thus arranged can still apply appropriate stretching force to all directions of the optical screen 1 in combination with the stretching requirements of the optical screen 1 in different directions, thereby achieving better stretching and fixing effects due to the elastic connecting member. 4
  • the reduction in quantity also brings convenience to the installation.
  • another projection screen structure is partially adhered to the optical screen by a soft connecting cloth, and the optical screen is fixed to the screen frame by the tensile force of the elastic connecting member, and the optical screen is realized.
  • the optical screen is stretched to a flat state, so that the flatness of the optical screen is better, and the display quality of the projected picture is improved.
  • the projection display system provided by these embodiments of the present disclosure includes a projection device 10 and a projection screen 11 in the foregoing embodiments for projecting a projection image onto an optical screen of a projection screen, in some embodiments of the present disclosure, projection
  • the device is a laser ultra-short-focus projection device with a small throw ratio, and projects the projection beam obliquely upward on the projection screen 11 at a large oblique angle.
  • the projection screen 11 is a front projection screen, and reflects light into the human eye to form a picture.
  • the specific structure, working principle and function of the projection screen have been described in detail in the foregoing embodiments, and are not described herein again.
  • the projection screen may include an optical screen, a flexible connecting portion, a screen frame disposed on a side of the flexible connecting portion away from the optical screen, and an elastic connecting member; thus the optical screen is fixed At the same time, it has better flatness, which is beneficial to improve the quality of projection display.

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

Abstract

L'invention concerne un écran de projection et un système d'affichage par projection. L'écran de projection comporte un écran optique (1), une partie (2) de liaison souple, un cadre (3) d'écran disposé du côté de la partie (2) de liaison souple écarté de l'écran optique (1), et un élément (4) de liaison élastique. Une première partie de liaison de la partie (2) de liaison souple est en liaison complète avec l'écran optique (1). Une seconde partie de liaison de la partie (2) de liaison souple est reliée à une première extrémité de l'élément (4) de liaison élastique. Une seconde extrémité de l'élément (4) de liaison élastique est reliée au cadre (3) d'écran. L'élément (4) de liaison élastique est configuré pour étirer l'écran optique (1) afin de le rendre plat au moyen de la partie (2) de liaison souple. Au moyen de l'écran de projection, une planéité satisfaisante peut être maintenue pendant la fixation de l'écran optique (1). Le système d'affichage par projection comporte un dispositif de projection et l'écran de projection. Le dispositif de projection est utilisé pour projeter une image de projection vers l'écran optique (1) de l'écran de projection.
PCT/CN2018/094512 2018-03-19 2018-07-04 Écran de projection et système d'affichage par projection WO2019178982A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201810225788.4 2018-03-19
CN201810225934.3A CN108398850A (zh) 2018-03-19 2018-03-19 投影屏幕及投影系统
CN201810225944.7 2018-03-19
CN201810225934.3 2018-03-19
CN201810225944.7A CN108388074A (zh) 2018-03-19 2018-03-19 投影屏幕及投影系统
CN201810225788.4A CN108681201B (zh) 2018-03-19 2018-03-19 投影屏幕及投影显示系统

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CN206209277U (zh) * 2016-12-02 2017-05-31 东莞市澳星视听器材有限公司 一种激光投影幕
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US6501599B1 (en) * 2001-08-14 2002-12-31 John William Randolph Double concave screen and method of assembly
CN201134007Y (zh) * 2007-11-08 2008-10-15 乔统工业股份有限公司 投影布幕
CN202837795U (zh) * 2012-09-21 2013-03-27 厦门美屏电子有限公司 一种超大背投屏幕固定装置
CN203941373U (zh) * 2014-05-06 2014-11-12 郑强 一种采用挂绳固定银幕布的银幕框架和电影银幕
CN204903939U (zh) * 2015-08-06 2015-12-23 广州市雄云视听设备有限公司 一种多功能画框幕
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US11782336B2 (en) * 2019-06-19 2023-10-10 Hisense Laser Display Co., Ltd Projection screen, projection system and assembly method of projection screen

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