CN216361909U

CN216361909U - Projection screen

Info

Publication number: CN216361909U
Application number: CN202123165062.2U
Authority: CN
Inventors: 李建军; 杨长明; 戴洁
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-22
Anticipated expiration: 2031-12-15

Abstract

The application discloses projection screen belongs to projection technical field. The projection screen includes: the flexible carrier, the diaphragm and the bonding portion between the flexible carrier and the diaphragm. Because the area of the bonding area bonded with the bonding part on the membrane is smaller than that of the non-bonding area, namely, a cavity exists between the non-bonding area with larger area in the membrane and the flexible carrier, no air bubble is generated in the part of the area. Therefore, even if air bubbles are generated between the bonded region and the bonded portion in the film sheet after the bonded region and the bonded portion having a small area in the film sheet are bonded, the air bubbles can be released through the cavity between the non-bonded region and the flexible support in the film sheet. The probability of bubbles generated in the process of bonding the bonding part and the membrane is effectively reduced, and the bad phenomenon that the projection screen bulges can be effectively avoided.

Description

Projection screen

Technical Field

The application relates to the technical field of projection, in particular to a projection screen.

Background

With the continuous development of science and technology, projection devices are increasingly applied to the work and life of consumers. At present, a projection device mainly comprises a projection host and a projection screen. The light outlet of the projection host faces the projection screen to emit light beams to the projection screen, and the projection screen is used for receiving the light beams to realize the display of pictures.

Currently, the projection screen 00 mainly includes a flexible carrier 01 (e.g., synthetic cloth), a film 02 and a whole layer of adhesive film 03. Referring to fig. 1 and 2, fig. 1 is a plan view of a projection screen in the related art, and fig. 2 is an exploded view of the projection screen shown in fig. 1. One side of the whole layer of adhesive film 03 is bonded with the back of the membrane 02, and the other side is bonded with the flexible carrier 01, so that the membrane 02 is fixed on the flexible carrier 01.

However, in the process of bonding the flexible carrier 01 and the film 02 through the entire adhesive film 03, air bubbles are easily generated between the adhesive film 03 and the film 02, and thus the projection screen 00 is easily bulged.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen. The projection screen can solve the problem that the projection screen in the prior art is easy to bulge, and the technical scheme is as follows:

in one aspect, a projection screen is provided, the projection screen comprising:

the flexible film comprises a flexible carrier, a film and a bonding part positioned between the flexible carrier and the film;

the back surface of the diaphragm is bonded with the bonding part, and the front surface of the diaphragm is used for receiving light beams emitted by the projection host machine so as to present a projection picture;

the flexible carrier is bonded with one side of the bonding part, which is far away from the membrane;

wherein the membrane has an adhesive region adhered to the adhesive part, and a non-adhesive region outside the adhesive region, the area of the non-adhesive region being larger than that of the adhesive region

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a projection screen, comprising: the flexible carrier, the diaphragm and the bonding portion between the flexible carrier and the diaphragm. Because the area of the bonding area bonded with the bonding part on the membrane is smaller than that of the non-bonding area, namely, a cavity exists between the non-bonding area with larger area in the membrane and the flexible carrier, no air bubble is generated in the part of the area. Therefore, even if air bubbles are generated between the bonded region and the bonded portion in the film sheet after the bonded region and the bonded portion having a small area in the film sheet are bonded, the air bubbles can be released through the cavity between the non-bonded region and the flexible support in the film sheet. The probability of bubbles generated in the process of bonding the bonding part and the membrane is effectively reduced, and the bad phenomenon that the projection screen bulges can be effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a top view of a projection screen of the related art;

FIG. 2 is an exploded view of the projection screen shown in FIG. 1;

FIG. 3 is a top view of a projection screen provided in an embodiment of the present application;

FIG. 4 is an exploded view of the projection screen shown in FIG. 3;

FIG. 5 is a schematic view of a bonding portion connected to a membrane according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of another bonding portion and film connection provided by an embodiment of the present application;

FIG. 7 is a schematic view of a bonding portion and a film sheet according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a projection screen according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 3 and 4, fig. 3 is a top view of a projection screen according to an embodiment of the present disclosure, and fig. 4 is an exploded view of the projection screen shown in fig. 3. Projection screen 000 may include: a flexible carrier 100, a membrane 200 and an adhesive 300. The bonding portion 300 may be located between the flexible carrier 100 and the membrane 200.

The rear surface of the film sheet 200 in the projection screen 000 may be bonded to the bonding portion 300, and the flexible carrier 100 in the projection screen 000 may be bonded to the side of the bonding portion 300 away from the film sheet 200. In this way, the adhesive portion 300 can fix the membrane sheet 200 to the flexible carrier 100. The film 200 may have an adhesive area a1 adhered to the adhesive part 300, and a non-adhesive area a2 outside the adhesive area a 1. The area of the non-bonded region a2 in the membrane sheet 200 is larger than the area of the bonded region a1 in the membrane sheet 200.

After the projection screen 000 is integrated into the projection device, the front surface of the film 200 may be used to receive a light beam emitted from a projection host in the projection device to present a projection picture. For example, the film 200 may be an optical film, and the flexible carrier 100 may be a flexible cloth such as a synthetic cloth, but may also be another flexible member as long as it can be bent at will and has a certain flatness after being tensioned, which is not limited in this embodiment of the application. It should be noted that the projection of the flexible carrier 100 on the plane of the membrane 200 covers the side of the membrane 200 to ensure that the edge portion of the flexible carrier 100 extends out of the side of the membrane 200, so as to ensure the flatness of the membrane 200 while tensioning the flexible carrier 100.

For example, the operator may first bond the bonding portion 300 within the bonding area a1 of the membrane 200; then, the side away from the membrane 200 is bonded to the flexible carrier 100 by the bonding portion 300 to fix the membrane 200 to the flexible carrier 100. Since the area of the bonding region a1 bonded to the bonding part 300 on the membrane 200 is smaller than that of the non-bonding region a2, that is, a cavity exists between the non-bonding region a2 having a large area in the membrane 200 and the flexible carrier 100, no air bubbles are generated in this region. Therefore, even if air bubbles are generated between the bonding region a1 and the bonding portion 300 in the film sheet 200 after the bonding region a1 having a small area in the film sheet 200 is bonded to the bonding portion 300, the air bubbles can be released through the cavity between the non-bonding region a2 in the film sheet 200 and the flexible carrier 100. The probability of bubbles generated in the process of bonding the bonding part 300 and the film 200 is effectively reduced, and the bad phenomenon that the projection screen 000 bulges can be effectively avoided.

In summary, the projection screen provided in the embodiment of the present application includes: the flexible carrier, the diaphragm and the bonding portion between the flexible carrier and the diaphragm. Because the area of the bonding area bonded with the bonding part on the membrane is smaller than that of the non-bonding area, namely, a cavity exists between the non-bonding area with larger area in the membrane and the flexible carrier, no air bubble is generated in the part of the area. Therefore, even if air bubbles are generated between the bonded region and the bonded portion in the film sheet after the bonded region and the bonded portion having a small area in the film sheet are bonded, the air bubbles can be released through the cavity between the non-bonded region and the flexible support in the film sheet. The probability of bubbles generated in the process of bonding the bonding part and the membrane is effectively reduced, and the bad phenomenon that the projection screen bulges can be effectively avoided.

In the embodiment of the present application, please refer to fig. 5, and fig. 5 is a schematic connection diagram of a bonding portion and a film provided in the embodiment of the present application. The bonding part 300 in the projection screen 000 may include: at least one adhesive tape group, each adhesive tape group may include two adhesive tapes 301 arranged in parallel, and two adhesive tapes 301 in the adhesive tape group are respectively bonded to a set of oppositely disposed side edges of the film sheet 200. In this application, the shape of the projection screen 000 may be rectangular or other shapes, which is not limited in this application. In the following embodiments, the projection screen 000 is illustrated as being rectangular, that is, the front surface of the diaphragm 200 is rectangular.

For example, the number of at least one adhesive tape group in the bonding portion 300 may be one, two adhesive tapes 301 arranged in parallel in this adhesive tape group may be bonded to the side edges where the two long sides in the film 200 are located, or two adhesive tapes 301 arranged in parallel in this adhesive tape group may be bonded to the side edges where the two short sides in the film 200 are located, which is not limited in this embodiment of the application.

In other realizable manners, the strip of glue 301 in the bonding portion 300 may also be replaced by a group of glue pieces. Wherein, the glue piece group can include: at least one row of rubber blocks arranged in an array, and the distance between any two adjacent rubber blocks in each row of rubber blocks can be equal. Thus, the supporting force of the rubber block to the membrane 200 can be uniformly distributed on the membrane 200.

Optionally, please refer to fig. 6, where fig. 6 is a schematic connection diagram of another bonding portion and a film provided in the embodiment of the present application. When the number of at least one adhesive tape group in the projection screen 000 is two, two adhesive tapes 301 in one adhesive tape group may be respectively bonded to the edges where the two long sides in the film 200 are located, and two adhesive tapes 301 in the other adhesive tape group may be respectively bonded to the edges where the two short sides in the film 200 are located. In this case, the four adhesive tapes 301 are respectively adhered to the four side edges of the membrane sheet 200, and the sides of the four adhesive tapes 301 far away from the membrane sheet 200 are all adhered to the flexible carrier 100, so that the membrane sheet 200 can be stably adhered to the flexible carrier 100.

In the embodiment of the present application, an example is schematically illustrated in which after adhesive tape 301 is bonded to film sheet 200, a certain distance is present between a side surface of adhesive tape 301 close to an edge of film sheet 200 and a side surface of film sheet 200. In other possible implementations, after the adhesive tape 301 is adhered to the membrane sheet 200, the side of the adhesive tape 301 close to the edge of the membrane sheet 200 may be coplanar with the side of the membrane sheet 200.

When a certain distance exists between the side face of the adhesive tape 301 close to the edge of the membrane sheet 200 and the side face of the membrane sheet 200, the distance d1 between the side face of the adhesive tape 301 bonded at the edge where the long side of the membrane sheet 200 is located and the side face where the long side of the membrane sheet 200 is located is equal to the distance d2 between the side face of the adhesive tape 301 bonded at the edge where the short side of the membrane sheet 200 is located and the side face where the short side of the membrane sheet 200 is located.

In the embodiment of the present application, as shown in fig. 6, four adhesive tapes 301 in two adhesive tape groups in the adhesive part 300 may be used to form a ring-shaped connecting structure. By way of example, the four glue strips 301 of the two glue strip sets may be a first glue strip 301a, a second glue strip 301b, a third glue strip 301c and a fourth glue strip 301d, respectively. The first adhesive tape 301a, the second adhesive tape 301b, the third adhesive tape 301c, and the fourth adhesive tape 301d may be sequentially connected at the head. For example, the second end of first adhesive strip 301a may be connected to the first end of second adhesive strip 301b, the second end of second adhesive strip 301b may be connected to the first end of third adhesive strip 301c, the second end of third adhesive strip 301c may be connected to the first end of fourth adhesive strip 301d, and the second end of fourth adhesive strip 301d may be connected to the first end of first adhesive strip 301 a. Therefore, the first adhesive tape 301a, the second adhesive tape 301b, the third adhesive tape 301c and the fourth adhesive tape 301d can be sequentially connected at the head, so that the four adhesive tapes 301 can form an annular connecting structure. When the two adhesive tapes 301 in each adhesive tape set are parallel to each other, the annular connecting structure formed by the four adhesive tapes 301 may be rectangular.

Optionally, please refer to fig. 7, and fig. 7 is a schematic connection diagram of another bonding portion and a film provided in the embodiment of the present application. When the number of at least one adhesive tape group in the adhesive part 300 is one, the adhesive part 300 in the projection screen 000 may further include at least one auxiliary adhesive tape 302 arranged between two adhesive tapes 301 in one adhesive tape group. In this way, the stability of the fit between the membrane 302 and the flexible carrier 100 can be effectively enhanced by the auxiliary glue strips 302 and the two glue strips 301 that are bonded to one set of opposite side edges of the membrane 200.

In the present embodiment, the extending directions of the two adhesive tapes 301 bonded to the set of opposite side edges of the film sheet 200 and the extending direction of the auxiliary adhesive tape 302 are parallel, and the width of the adhesive tape 301 and the width of the auxiliary adhesive tape 302 may be the same. In this case, the respective glue strips 301 and auxiliary glue strips 302 in a glue strip group are parallel to each other. Thus, the stability of the fit between the membrane 200 and the flexible carrier 100 is further enhanced.

In the present application, two adhesive strips 301 and at least one auxiliary adhesive strip 302 in one adhesive strip group can be uniformly distributed on the back surface of the membrane 200. When the number of at least one auxiliary glue strip 302 is one, the distance between this auxiliary glue strip 302 and two glue strips 301 bonded to a set of opposite side edges of the film sheet 200 may be equal. In this way, the supporting force provided by each adhesive tape 301 and the auxiliary adhesive tape 302 in the adhesive tape set to the membrane sheet 200 is uniformly distributed on the membrane sheet 200, and the stability of the attachment between the membrane sheet 200 and the flexible carrier 100 is further enhanced.

It should be noted that, when two adhesive tapes 301 in one adhesive tape group are respectively bonded to edges where two long sides in the film sheet 200 are located, the extending direction of the auxiliary adhesive tape 302 is the same as the direction where the long sides of the film sheet 200 are located; when two adhesive tapes 301 in one adhesive tape group are respectively bonded with the edges of the film sheet 200 where the two short sides are located, the extending direction of the auxiliary adhesive tape 302 is the same as the direction of the short side of the film sheet 200.

Alternatively, the width d3 of the adhesive strip 301 in the adhesive part 300 may range from 30 mm to 150 mm. By way of example, the strip 301 may have a width of 35 mm. Note that, when the width of the adhesive tape 301 in the adhesive portion 300 may range from 30 mm to 150 mm, the width of the auxiliary adhesive tape 302 located between the two adhesive tapes 301 may also range from 30 mm to 150 mm.

In the embodiment of the present application, the adhesive strip 301 in the bonding portion 300 may be a strip structure made of Polyethylene Terephthalate (PET) double-sided adhesive. The PET double faced adhesive tape has the advantages of good mechanical property, high temperature resistance and low temperature resistance. In other realizable manners, the adhesive tape 301 may also be a strip-shaped structure made of foam cotton, which is not limited in this application.

Optionally, please refer to fig. 8, and fig. 8 is a schematic structural diagram of a projection screen according to an embodiment of the present application. Projection screen 000 may also include: the flexible carrier 100 can be attached to the front surface of the rectangular frame 400, and the edges of the flexible carrier 100 are folded to wrap the edges of the rectangular frame 400. The membrane 200 may be fixed to one side of the flexible carrier 100 with the edges of the flexible carrier 100 extending beyond the four sides of the membrane 200. The other side of the flexible carrier 100 may be attached to the front surface of the rectangular frame 400, and the edges of the flexible carrier 100 are folded over to wrap the edges of the rectangular frame 400.

In the embodiment of the present application, the projection screen 000 may further include: a tensioning mechanism 500, the tensioning mechanism 500 being capable of adjusting the degree of tension of the flexible carrier 100, and thus of the diaphragm 200. The tensioning mechanism 500 may be located at the back of the rectangular frame 400, and one end of the tensioning mechanism 500 may be fixed at the edge of the flexible carrier 100 and the other end may be connected with the rectangular frame 400.

By way of example, the tensioning mechanism 500 may include: a first tensioning mechanism 501 and a second tensioning mechanism (not shown). Wherein the first tensioning mechanism 501 can adjust the degree of tension of the flexible carrier 100 in the short side direction (e.g., Y-axis direction) of the flexible carrier 100; the second tensioning mechanism can adjust the degree of tension of the flexible carrier 100 in the long-side direction (for example, the Z-axis direction) of the flexible carrier 100.

The first tensioning mechanism 501 may include: a first tension member 5011 and a first support post 5012. One end of the first tension member 5011 is connected to the first support bar 5012, and the other end of the first tension member 5011 is connected to the rectangular frame 400. The first support bar 5012 is connected to an edge portion of the flexible carrier 100 in the long side direction of the rectangular frame 400. For example, an edge portion of the flexible carrier 100 may have a receiving pocket B1, i.e., the edge portion of the flexible carrier 100 may be folded over an edge of the rectangular frame 400 to form a receiving pocket B1. The receiving pocket B1 can have an opening (not shown) through which one end of the first tension member 5011 can be attached to the first support post 5012. In this way, the edge portion of the flexible carrier 100 is integrally supported by the first support bars 5012, and then the first support bars 5012 are tensioned by the first tension members 5011, so that the integral tensioning of the edge portion of the flexible carrier 100 by the first tension members 5011 is achieved. Thereby guaranteed to the taut homogeneity of flexible carrier 100, avoided flexible carrier 100 to appear the phenomenon of fold because of local tautness is great, and then can avoid appearing the phenomenon of fold with the diaphragm 200 of flexible carrier 100 laminating.

In an embodiment of the present application, the second tensioning mechanism may comprise: a second tension member and a second support bar. One end of the second tension member is connected to the second support bar, and the other end of the second tension member is connected to the rectangular frame 400. The second support bar is connected to the edge portion of the flexible carrier 100 in the short side direction of the rectangular frame 400. For example, the edge portion of the flexible carrier 100 may have a receiving pocket, i.e., the edge portion of the flexible carrier 100 may be folded over the edge of the rectangular frame 400 to form a receiving pocket B1. The receiving pocket B1 may have an opening (not shown) through which one end of the second tension member may be coupled to the second support bar. The structure of the second tensioning mechanism can refer to the structure of the first tensioning mechanism 501. In this way, the edge portion of the flexible carrier 100 is integrally supported by the second support rod, and then the second support rod is tensioned by the second tensioning member, so that the integral tensioning of the edge portion of the flexible carrier 100 by the second tensioning member is realized. Thereby guaranteed to the taut homogeneity of flexible carrier 100, avoided flexible carrier 100 to appear the phenomenon of fold because of local tautness is great, and then can avoid appearing the phenomenon of fold with the diaphragm 200 of flexible carrier 100 laminating.

Optionally, the first tension member 5011 and the second tension member can both be tension springs. In the present application, the first tension member 5011 and the second tension member may also be in other tension structures, which is not limited in the embodiments of the present application. For example, when the first tension member 5011 is an extension spring, one end of the extension spring may be connected to the first support bar 5012 by a hook, and the other end of the extension spring may be connected to the long side of the rectangular frame 400 by a hook. When the second tensioning member is an extension spring, one end of the extension spring may be connected to the second support rod through a hook, and the other end of the extension spring may be connected to the short side of the rectangular frame 400 through a hook.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims

1. A projection screen, comprising: the flexible film comprises a flexible carrier, a film and a bonding part positioned between the flexible carrier and the film;

the membrane is provided with an adhesion area adhered with the adhesion part and a non-adhesion area positioned outside the adhesion area, and the area of the non-adhesion area is larger than that of the adhesion area.

2. The projection screen of claim 1 wherein the adhesive comprises: the adhesive tape set comprises two adhesive tapes which are arranged in parallel, and the two adhesive tapes in the adhesive tape set are respectively bonded with the side edges of one group of the membranes which are arranged oppositely.

3. The projection screen of claim 2, wherein when the number of the at least one adhesive tape group is two, two adhesive tapes in one adhesive tape group are respectively bonded to edges where two long sides of the film are located, and two adhesive tapes in the other adhesive tape group are respectively bonded to edges where two short sides of the film are located.

4. The projection screen of claim 3 wherein four strips of the two sets of strips are configured to form a ring-shaped joint structure.

5. The projection screen of claim 2 wherein when the number of the at least one adhesive strip set is one, the adhesive portion further comprises: at least one auxiliary strip arranged between two of said strips.

6. The projection screen of claim 5 wherein the direction of extension of the adhesive strip is parallel to the direction of extension of the auxiliary adhesive strip and the width of the adhesive strip is the same as the width of the auxiliary adhesive strip.

7. The projection screen of any one of claims 2-6 wherein the strip has a width in the range of 30 mm to 150 mm.

8. A projection screen according to any one of claims 2 to 6 wherein the strips are strips of PET.

9. The projection screen of any one of claims 1-8, wherein the projection screen further comprises: the flexible carrier is attached to the front face of the rectangular frame, and the edge of the flexible carrier is folded to wrap the edge of the rectangular frame.

10. The projection screen of claim 9, wherein the projection screen further comprises: and the tensioning mechanism is positioned on the back surface of the rectangular frame, one end of the tensioning mechanism is fixed at the edge of the flexible carrier, and the other end of the tensioning mechanism is connected with the rectangular frame.