Projection screen and projection system

Patent metadata

Field	Value
Publication number	US-2021173293-A1
Application number	US-202117182701-A
Country	US
Kind code	A1
Filing date	Feb 23, 2021
Priority date	Mar 19, 2018
Publication date	Jun 10, 2021
Grant date	—

Abstract

A projection screen includes a screen board, a connecting cloth, a screen frame, and at least one connecting member. The screen board has a first surface and a second surface opposite, the screen board has a light receiving region and an edge region surrounding the light receiving region. At least one edge of the connecting cloth protrudes from a corresponding edge of the screen board, and at least a portion of the second surface of the screen board located in the edge region is connected to the connecting cloth. The screen frame has a hollow structure, an orthographic projection of the screen board on a plane parallel to the first surface is located within an outer border of an orthographic projection of the screen frame on the plane. The at least one connecting member connects at least one edge of the connecting cloth to the screen frame.

First claim

What is claimed is:

1 . A projection screen, comprising:
a screen board having a first surface and a second surface opposite to each other, the screen board having a light receiving region and an edge region surrounding the light receiving region; a connecting cloth disposed on the second surface of the screen board, at least one edge of the connecting cloth protruding from a corresponding edge of the screen board; and at least a portion of the second surface of the screen board located in the edge region being connected to the connecting cloth; a screen frame having a hollow structure, an orthographic projection of the screen board on a plane parallel to the first surface being located within an outer border of an orthographic projection of the screen frame on the plane, and each edge of the connecting cloth being connected to the screen frame; and at least one connecting member connecting at least one edge of the connecting cloth to the screen frame, the at least one connecting member being configured to provide a tension to the connecting cloth.

2 . The projection screen according to claim 1 , wherein the at least one connecting member includes a spring, a rubber member, an elastic silica gel member, or a magnetic adsorption member.

3 . The projection screen according to claim 1 , wherein the connecting cloth entirely covers the second surface of the screen board.

4 . The projection screen according to claim 1 , wherein the at least one connecting member includes a plurality of connecting members, each edge of the connecting cloth protrudes from a corresponding edge of the screen board, and is connected to the screen frame through at least one of the plurality of connecting members.

5 . The projection screen according to claim 4 , wherein the at least one of the plurality of connecting members connected to the edge of the connecting cloth includes multiple connecting members, and the multiple connecting members are equally spaced.

6 . The projection screen according to claim 1 , further comprising at least one first reinforcing structure, wherein each first reinforcing structure is enabled to be in direct contact with an edge of the connecting cloth protruding from a corresponding edge of the screen board; and the first reinforcing structure is configured to reinforce a structure of the edge.

7 . The projection screen according to claim 6 , wherein the at least one first reinforcing structure is a rod member;
the edge of the connecting cloth protruding from the corresponding edge of the screen board forms a through hole configured to accommodate the rod member, the through hole extends in an extending direction of a corresponding side of the screen board, and the rod member is disposed in the through hole; and the edge of the connecting cloth has at least one group of openings, and each group of openings corresponds to one connecting member; and the group of openings includes at least one opening configured to allow a portion of the corresponding connecting member to pass through, so that the corresponding connecting member is connected to the rod member through the group of openings.

8 . The projection screen according to claim 7 , wherein the rod member and the corresponding connecting member are both located at a side of the screen frame away from the screen board.

9 . The projection screen according to claim 6 , wherein the first reinforcing structure is a thickening cloth layer.

10 . The projection screen according to claim 1 , further comprising a polyurethane layer disposed on a surface of the connecting cloth proximate to the screen board, wherein the polyurethane layer is at least located in a region where the connecting cloth is connected to the screen board.

11 . The projection screen according to claim 1 , wherein an outer border of the orthographic projection of the screen board on the plane is located within the orthographic projection of the screen frame on the plane.

12 . The projection screen according to claim 11 , wherein the screen frame includes:
a frame body having a hollow region; and a plurality of support portions each directly connected to a corresponding side face of the frame body facing away from the hollow region, the outer border of the orthographic projection of the screen board on the plane is located within orthographic projections of the plurality of support portions on the plane; and edges of the plurality of support portions away from the frame body are outer edges of the screen frame, wherein each edge of the connecting cloth protrudes from a corresponding edge of the screen board, and is bent in a direction away from the screen board, so that the edge of the connecting cloth wraps an edge of a corresponding support portion away from the frame body and extends to a side of the screen frame away from the screen board; and a portion of the edge of the connecting cloth extending to the side of the screen frame away from the screen board is connected to the screen frame through the at least one connecting member.

13 . The projection screen according to claim 12 , wherein the at least one connecting member is a pull spring, and one end of the pull spring is a hook; and
the screen frame further includes at least one connecting structure connected to the frame body or at least one of the support portions, and the at least one connecting structure is configured to fix the hook.

14 . The projection screen according to claim 12 , wherein the at least one connecting member is configured to provide the tension to the connecting cloth in a direction, an angle between which and a plane where the first surface of the screen board is located is less than or equal to 45 degrees, and greater than or equal to 0 degrees.

15 . The projection screen according to claim 12 , wherein the screen frame further includes a plurality of protrusions disposed on a surface of each support portion proximate to the connecting cloth and/or away from the connecting cloth.

16 . The projection screen according to claim 15 , wherein the plurality of protrusions are disposed on the surface of the support portion proximate to the connecting cloth; and
surfaces of the plurality of protrusions proximate to the connecting cloth are parallel to a plane where the second surface of the screen board is located, and surfaces of at least part of the plurality of protrusions proximate to the connecting cloth are in direct contact with the connecting cloth.

17 . The projection screen according to claim 12 , wherein the screen frame further includes at least one first reinforcing beam that spans across the hollow region and is fixed to the frame body.

18 . The projection screen according to claim 1 , further comprising a decorative frame connected to the screen frame, wherein the decorative frame is configured to wrap outer edges of the screen frame.

19 . The projection screen according to claim 12 , wherein the screen frame has a mounting groove having a shape of a rectangle with an opening, the screen frame further includes a hanger assembly inserted into the mounting groove, and the hanger assembly is capable of being fixed on a vertical surface.

20 . A projection system, comprising a projection device and the projection screen according to claim 1 , wherein the projection device is configured to project images onto the screen board of the projection screen.

Assignees

• Hisense Laser Display Co Ltd

Inventors

• Li Jianjun
• Yang Changming
• Zhong Qiang
• Zhao Yun

Classifications

• G03B21/56 Primary

  Projection screens · CPC title

• G03B21/60 Primary

  characterised by the nature of the surface · CPC title

• G03B21/54

  Accessories · CPC title

• G03B21/58

  collapsible, e.g. foldable; of variable area · CPC title

• G03B21/64

  Means for mounting individual pictures to be projected, e.g. frame for transparency · CPC title