CN113009763B - Display screen and projection device - Google Patents

Abstract

The application discloses a display screen and projection equipment, and belongs to the technical field of projection. The display screen comprises a back plate and an optical film; the optical membrane is fixed on the backboard; one side of the backboard far away from the optical film is provided with one or more first connecting parts, the backboard is used for being fixedly connected with one or more second connecting parts which are correspondingly arranged on the mounting surface through the one or more first connecting parts, and after each first connecting part is fixedly connected with the corresponding second connecting part, the distance between one side of the backboard far away from the optical film and the mounting surface is smaller than 1mm. Because the distance between one side of the backboard far away from the optical membrane and the mounting surface is smaller than 1mm, the display screen can only slightly shake within the range of 1mm, or is directly and stably attached to the mounting surface, so that the display effect of the display screen can be improved; in addition, the gap between the back plate and the mounting surface is small, so that the visible thickness of the side surface of the display screen can be reduced.

Description

Display screen and projection device

Technical Field

The present application relates to the field of projection technologies, and in particular, to a display screen and a projection device.

Background

With the continuous development of technology, projection devices are increasingly used in people's work and life. Currently, projection devices mainly include a projection host and a display screen. The projection host is mainly used for emitting light to the display screen, and the display screen is fixed on the mounting surface and is used for receiving the light beam emitted by the projection host so as to realize the display of pictures.

In the related art, as shown in fig. 1, a hanging groove 011 is provided on the back surface of a display screen 1, and a hanger 021 is provided on a mounting surface 2, and then the display screen 1 is fixed on the mounting surface 2by the cooperation of the hanging groove 011 and the hanger 021. However, when the fixing of the display screen 1 is achieved through the cooperation of the hanging groove 011 and the hanging rack 021, a certain gap is easily formed between the display screen 1 and the mounting surface 2 due to the thickness of the hanging groove 011 and the hanging rack 021, so that the shaking of the display screen 1 is easily caused due to the influence of external factors, and the display effect is easily affected.

Disclosure of Invention

The application provides a display screen and projection equipment, which can solve the problem that the display screen is easy to shake. The technical scheme is as follows:

In one aspect, a display screen, the display screen comprising:

a back plate and an optical film;

the optical film is fixed on the backboard;

one side of the backboard far away from the optical membrane is provided with one or more first connecting parts, the backboard is used for being connected with one or more second connecting parts which are arranged on the mounting surface in an embedded mode through the one or more first connecting parts, and after each first connecting part is connected with the corresponding second connecting part in a fixed mode, the distance between one side of the backboard far away from the optical membrane and the mounting surface is smaller than 1mm.

In one possible implementation, at least one groove is present in the one or more first connection portions, and correspondingly, at least one boss is present in the one or more second connection portions in a one-to-one correspondence with the at least one groove.

Optionally, at least one boss is present in the one or more first connection portions, and correspondingly, at least one groove corresponding to the at least one boss is present in the one or more second connection portions.

Optionally, each groove is of annular configuration.

Optionally, each groove is a strip-like structure.

Optionally, the at least one groove is a plurality of grooves, the plurality of grooves are located on the same straight line, and the length direction of each groove is parallel to the horizontal plane.

Optionally, the at least one groove is distributed along the height direction of the backboard, and the length direction of each groove is parallel to the horizontal plane.

Optionally, the cross section of each groove is rectangular, and the corner of each groove is provided with an arc chamfer.

Optionally, the display screen further includes a frame, and the frame wraps the edge of the back plate, or wraps the edges of the back plate and the optical film.

In another aspect, a projection device includes a projection host and the display screen of the first aspect;

The projection host is positioned on one side of the display screen, which is close to the optical film, and the light outlet of the projection host faces to the display screen;

The projection host is used for emitting light beams to the display screen, and the display screen is used for receiving the light beams emitted by the projection host and displaying pictures.

The technical scheme provided by the application has the beneficial effects that at least the following steps are included:

One side of the backboard of the display screen, which is far away from the optical membrane, is provided with a first connecting part, the mounting surface is correspondingly provided with a second connecting part, and the display screen can be embedded and fixed on the mounting surface through the first connecting part and the second connecting part. After each first connecting part is fixedly connected with the corresponding second connecting part, the distance between one side, far away from the optical membrane, of the backboard and the mounting surface is smaller than 1mm, so that the display screen can only slightly shake within the range of 1mm, or is directly and stably attached to the mounting surface, and therefore, the display screen is prevented from shaking greatly, and the display effect of the display screen can be improved; in addition, the gap between the back plate and the mounting surface is small, so that the visible thickness of the side surface of the display screen can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic side view of a display screen according to the related art;

FIG. 2 is a schematic side view of a display screen according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a display screen according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another display screen according to an embodiment of the present application;

FIG. 5 is a schematic side view of another display screen according to an embodiment of the present application;

FIG. 6 is an exploded view of a display screen according to an embodiment of the present application;

FIG. 7 is a schematic side view of a display screen according to an embodiment of the present application;

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

Reference numerals:

Related technology:

1: a display screen; 2: a mounting surface;

011: a hanging groove; 021: and (5) hanging a rack.

The embodiment of the application comprises the following steps:

1: a display screen; 2: a mounting surface; 3: a projection host;

11: a back plate; 12: an optical film; 13: a first connection portion; 14: a frame; 21: and a second connecting part.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Fig. 2 illustrates a schematic side view of a display screen according to an embodiment of the present application. As shown in fig. 2, the display screen includes: a back plate 11 and an optical film 12 (not shown in the figure); the optical film 12 is fixed on the back plate 11; one side of the back plate 11 far away from the optical film 12 is provided with one or more first connecting parts 13, the back plate 11 is used for being fixedly connected with one or more second connecting parts 21 which are correspondingly arranged on the mounting surface 2 through the one or more first connecting parts 13, and after each first connecting part 13 is fixedly connected with the corresponding second connecting part 21, the distance between one side of the back plate 11 far away from the optical film 12 and the mounting surface 2 is smaller than 1mm.

In the embodiment of the application, a first connecting part 13 is arranged on one side, far away from the optical film 12, of the back plate 11 of the display screen 1, a second connecting part 21 is correspondingly arranged on the mounting surface, and the display screen 1 can be fixed on the mounting surface 2 through the first connecting part 13 and the second connecting part 21 in an embedded mode. Because the distance between one side of the backboard 11 far away from the optical film 12 and the mounting surface 2 is smaller than 1mm after each first connecting part 13 is fixedly connected with the corresponding second connecting part 21, the display screen 1 can only slightly shake within the range of 1mm or can be directly and stably attached to the mounting surface 2, so that the large shake of the display screen 1 is avoided, and the display effect of the optical film 12 of the display screen 1 can be improved; in addition, the gap between the back plate and the mounting surface is small, so that the visible thickness of the side surface of the display screen can be reduced.

The optical film 12 may be fixed on the back plate 11 by an adhesive or a magnetic stripe.

The mounting surface 2 may be a plane formed by fixing brackets or a wall surface of a wall body, so long as the fixation of the back plate 11 can be realized.

It should be noted that, in order to achieve stability of the connection between the mounting surface 2 and the back plate 11, each of the first connection portions 13 may be bonded with a corresponding one of the second connection portions 21 in a seamless manner.

Wherein each first connecting portion 13 and a corresponding one of the second connecting portions 21 may be bonded together by an adhesive. For example, the first connection portion 13 and the corresponding one of the second connection portions 21 may be bonded by double-sided adhesive. Of course, the adhesive with the vibration absorbing and damping capability can be used for bonding, so that the noise generated by the vibration of the display screen 1 can be avoided. Illustratively, the first connecting portion 13 and the corresponding one of the second connecting portions 21 may be bonded by a foam adhesive.

Of course, besides being fixed by bonding, each first connecting portion 13 and the corresponding second connecting portion 21 may also be fixedly connected by magnetic attraction, so as to facilitate separation of the back plate 11 from the mounting surface 2.

In some embodiments, as shown in fig. 2 and 3, at least one groove is present in one or more first connecting portions 13, and correspondingly, at least one boss corresponding to the at least one groove is present in one or more second connecting portions 21, each boss being capable of extending into a corresponding one of the grooves.

Wherein the depth of each groove may be between 0.5 and 0.75 times the thickness of the back plate 11. In this way, the problems of insufficient strength of the back plate 11 due to too shallow a groove depth, which results in weak fixation, and too deep a groove depth can be avoided. Of course, the depth of each groove may be adjusted in a small range according to the actual situation, so long as the screen is ensured to be stably fixed, and the strength of the back plate 11 is suitable, which is not limited by the embodiment of the present application.

Wherein the boss may be fixed to the mounting surface 2 beforehand by a fixing member, which may be a countersunk screw, for example. Of course, the boss may be integrally formed with the mounting surface 2, so that the boss can have higher stability, and the number of assembling steps may be reduced.

Wherein the grooves and the corresponding bosses may be arranged obliquely in the depth direction and the height direction, respectively. That is, the bottom end of the groove may be higher than the open end of the groove, and correspondingly the top end of the boss may be higher than the bottom end of the boss. In this way, the boss can apply a supporting force perpendicular to the contact surface to the groove, and the supporting force has a component force directed to the second connecting portion 21, and the component force can further enhance the fitting effect of the display screen 1 and the mounting surface 2, so that the display screen 1 can be more firmly fixed on the mounting surface 2.

In other embodiments, as shown in fig. 4, at least one boss is present in one or more first connecting portions 13, and correspondingly, at least one groove corresponding to at least one boss is present in one or more second connecting portions 21, and each boss can extend into a corresponding groove.

The height of the boss along the thickness direction of the back plate 11 may be within a height threshold range, which may be a threshold range for ensuring that the boss has enough strength when supporting the display screen 1, and the boss is not easy to fall out of the groove.

Illustratively, the height threshold may range between 0.5 and 1.5 times the thickness of the backplate 11. Of course, the depth of the boss may be adjusted in a small amount according to the actual situation, so long as sufficient strength can be ensured, which is not limited by the embodiment of the present application.

The boss may be fixed to the back plate 11 by a fixing member, which may be a countersunk screw, for example. Of course, the boss may be integrally formed with the back plate 11, so that the boss can have higher stability, and the assembling steps may be reduced.

Wherein the grooves and the corresponding bosses may be arranged obliquely in the depth direction and the height direction, respectively. That is, the bottom end of the groove may be lower than the open end of the groove, and correspondingly the top end of the boss may be lower than the bottom end of the boss. In this way, the recess can apply a supporting force perpendicular to the contact surface to the boss, and the supporting force has a component force directed to the second connecting portion 21, and the component force can further enhance the fitting effect of the display screen 1 and the mounting surface 2, so that the display screen 1 can be more firmly fixed on the mounting surface 2.

It should be noted that, the back plate 11 may be provided with one or more grooves or one or more bosses, or may be a combination of one or more grooves and one or more bosses, so long as the fixing of the back plate 11 can be achieved, which is not limited in the embodiment of the present application.

In the above two embodiments, the height of each boss in the thickness direction of the back plate 11 may be slightly smaller than the depth of the corresponding one of the grooves in the thickness direction of the back plate 11, so that after each boss extends into the corresponding one of the grooves, the boss may be completely hidden in the groove, thereby ensuring that the back plate 11 can be attached to the mounting surface 2. In addition, the width of each boss corresponding to each groove can be slightly smaller than the width of the corresponding groove, so that the installation can be facilitated.

Further, the width of each groove in the horizontal direction may be within a certain width threshold range, which may be a threshold range that can ensure a higher strength in the vertical direction when the display screen 1 is fixed by the boss and the groove. For example, the threshold range may be between 1 and 2 times the groove depth. Of course, the width of each boss and each groove may be adjusted according to the actual situation, so long as the display screen 1 can be supported with high strength, which is not limited by the embodiment of the present application.

In some embodiments, each groove may be a columnar structure.

The at least one groove may be a plurality of grooves, the plurality of grooves may be located in the same straight line, and the straight line where the at least one groove is located is parallel to the horizontal plane, and of course, the at least one groove may also be distributed along the vertical direction, or may be arrayed into a groove matrix with a plurality of rows and a plurality of columns.

When the number of the at least one groove is plural, the plural grooves can disperse stress on the display screen 1, and the more the number of the grooves is, the better the stress dispersing effect is.

It should be noted that, the bottom surface of every columnar groove and the corner of lateral wall all can be provided with the circular arc chamfer, like this, the circular arc chamfer can carry out the dispersion of a small scale with the stress of corner, and then avoids the phenomenon of local stress concentration of corner.

In other embodiments, each groove may be a bar-like structure.

The strip-shaped first connection portion 13 can increase the contact area between the back plate 11 and the mounting surface 2, and further uniformly disperse the stress on the back plate 11, so that the phenomenon of stress concentration can be avoided.

In order to make the effect of stress dispersion more remarkable, the length of the strip-shaped groove may be greater than or equal to 0.5 times the length of the back plate 11 in the horizontal direction. Of course, the length of the strip-shaped groove can be adjusted according to practical situations, so long as the effect of dispersing stress can be achieved, and the embodiment of the application is not limited to this. Accordingly, for ease of installation, the length of each boss may be slightly less than the length of the corresponding recess.

In addition, the length of the strip-shaped groove may be smaller than 0.5 times the length of the back plate 11 in the horizontal direction. In this way, in the case where at least one groove is a plurality of grooves, the plurality of grooves may be positioned on the same straight line, and the length direction of each groove is parallel to the horizontal plane, so that even dispersion of stress in the horizontal plane direction of the back plate 11 can be achieved as well.

In some embodiments, at least one groove may also be distributed along the height direction of the back plate 11, and the length direction of each groove is parallel to the horizontal plane, so that the stress can be uniformly dispersed in the horizontal plane direction and the height direction of the back plate 11 at the same time. Of course, the plurality of grooves may be distributed along the height direction of the back plate 11 while being distributed along the horizontal plane direction, that is, the plurality of grooves may be arrayed in a groove matrix of a plurality of rows and a plurality of columns.

The cross section of each groove can be rectangular, and of course, the cross section of each groove can be L-shaped. When the cross section of each groove is rectangular, the cross section of the boss on the mounting surface 2 corresponding to the groove may also be rectangular, so that the groove and the boss have simpler structures and are convenient to process and mount. When the cross-sectional shape of each groove is L-shaped, the cross-sectional shape of the boss on the mounting surface 2 corresponding to the groove may also be L-shaped, and the vertical height of the open end of the groove may be greater than or equal to the entire height of the boss for convenience of mounting. In this way, the second connection portion 21 can apply the supporting force to the first connection portion 13 both vertically upward and horizontally toward the mounting surface 2, so that the display screen 1 can be supported more stably with the cooperation of the second connection portion 21 and the first connection portion 13.

It should be noted that, when the strip-shaped groove is fixed with the corresponding boss, the shapes of the cross sections of the strip-shaped groove and the boss can be adjusted to increase the contact area between the boss and the backboard 11 on the plane where the backboard 11 is located, so that the phenomenon of acting force dispersion can be realized through the boss.

It should be further noted that, the corner of each adjacent side wall of each strip-shaped groove and the corner of each adjacent side wall of a corresponding boss can be provided with an arc chamfer, so that the arc chamfer can disperse stress at the corner in a small range, and further local stress concentration at the corner is avoided.

In still other embodiments, each groove may be a ring-like structure.

The annular structure may be a circular annular structure, or may be a square annular structure or an annular structure with other shapes.

When the grooves are in a circular structure, if the diameter of the grooves is larger, the number of the grooves may be one, that is, a larger circular groove may be disposed on the back plate 11.

For example, the diameter of the larger annular groove may be 0.75 times the length of the backboard 11 in the horizontal direction, so that a wide range of stress dispersion may be achieved, and of course, the diameter of the annular groove may be adjusted according to the actual situation, so long as the stress dispersion may be achieved, which is not limited in the embodiment of the present application.

If the diameter of the grooves is smaller, the number of the grooves may be plural, and the grooves are disposed on the back plate 11 in an array manner, so that the stress on the back plate 11 can be uniformly dispersed. In addition, the plurality of grooves may be arranged in a plurality of concentric circles, so long as the stress on the back plate 11 can be uniformly dispersed, which is not limited in the embodiment of the present application.

It should be noted that, the corner of each adjacent side wall of each annular groove and the corner of each adjacent side wall of a corresponding boss can be provided with an arc chamfer, so that the arc chamfer can disperse stress at the corner in a small range, and further local stress concentration at the corner is avoided.

Of course, the at least one groove may be provided in other shapes besides a columnar, bar-shaped, and ring-shaped structure, as long as the purpose of supporting the display screen 1 and stress dispersion can be achieved, which is not limited by the embodiment of the present application.

It should be noted that, when at least one first connecting portion 13 of the one or more first connecting portions 13 is a boss, the shape of the boss may be similar to the structure and shape of the groove discussed above, and of course, the boss may be configured in other shapes.

In some embodiments, the surface of the optical film 12 remote from the back plate 11 protrudes from the frame, and the surface of the back plate 11 remote from the optical film 12 protrudes from the frame, or is flush with the frame. That is, the thickness of the frame is smaller than the sum of the thicknesses of the optical film 12 and the back plate 11, in other words, the frame does not affect the entire thickness of the display screen, and thus, the light and thin display screen can be realized by reducing the thicknesses of the optical film 12 and the back plate 11 alone.

In some embodiments, the optical film 12 is fixed on the back plate 11, the first projection covers the second projection, and the distance between the edge of the first projection and the edge of the second projection is less than 1mm. The first projection refers to the projection of the back plate 11 and the frame in the thickness direction of the back plate 11, and the second projection refers to the projection of the optical film 12 in the thickness direction of the back plate 11. The surface of the optical film 12 remote from the back plate 11 protrudes from the frame, and the surface of the back plate 11 remote from the optical film 12 protrudes from the frame, or is flush with the frame.

In some embodiments, the display screen 1 may further include a bezel 14, the bezel 14 wrapping around the edge of the back plate 11, or wrapping around the edges of the back plate 11 and the optical film 12.

When the bezel includes the edges of the back plate, in some embodiments, as shown in fig. 5, the frame 14 of the frame may be U-shaped in cross-section. When the cross section of the frame 14 is U-shaped, in one possible implementation, both sides of the edge of the back plate 11 are stepped, and the frame 14 is fixed on the edge of the back plate 11. That is, a first step is provided on the surface of the back plate 11 close to the optical film 12 in the thickness direction, a second step is provided on the surface of the back plate 11 far from the optical film 12 in the thickness direction, and the frame 14 is fixed on the edge of the back plate 11 by the step surface of the first step and the step surface of the second step. In other words, the frame 14 having the U-shaped cross section may be first fastened to the step surface of the first step and the step surface of the second step, thereby achieving the fixation of the frame 14 to the edge of the back plate 11 through the step surface of the first step and the step surface of the second step.

The frame 14 may be fixed to the step surface of the first step and the step surface of the second step by double-sided tape, so as to fix the frame 14 to the edge of the back plate 11. Of course, the frame 14 may be fixed to the step surface of the first step and the step surface of the second step in other manners, which is not particularly limited in the embodiment of the present application.

In some embodiments, when the cross-section of the frame 14 is U-shaped, as shown in fig. 5, in one possible implementation, the frame 14 may include a first elastic member and a second elastic member that are disposed opposite to each other, and the frame 14 is clamped to the edge of the back plate 11 by the first elastic member and the second elastic member. In other words, the bezel 14 can be clamped on the step surface of the first step and the step surface of the second step by the first elastic member and the second elastic member. That is, the frame 14 is clamped to the step surface of the first step and the step surface of the second step by the first elastic member and the second elastic member, thereby fixing the frame 14 to the edge of the back plate 11. Thus, when the back plate 11 is thin, the problem that the frame 14 is loosened and the frame is loosened on the back plate 11 due to the fact that the frame 14 is fixed on the back plate 11 through the screw fixing mode is avoided.

Further, to enable the frame to be better secured to the back plate 11, in some embodiments, an adhesive may be filled between the first elastic member and the optical film 12, where the first elastic member refers to an elastic member located between the back plate 11 and the optical film 12. In this way, in addition to fixing the bezel 14 to the edge of the back plate 11 by the first elastic member and the second elastic member being clamped on the step surface of the first step and the step surface of the second step, the first elastic member may be bonded to the back plate 11 by an adhesive, so that the frame is more firmly fixed to the back plate 11.

When the cross-section of the rim 14 is U-shaped, in another possible implementation, as shown in fig. 6, the rim 14 may include a third resilient member and a first rigid member. The frame 14 is clamped at the edge of the back plate 11 by a first rigid part and a third elastic part, the first rigid part being located between the back plate 11 and the optical film 12. In other words, the first rigid member is located between the step surface of the first step and the optical film 12, and the bezel 14 can be clamped on the step surface of the first step and the step surface of the second step by the first rigid member and the third elastic member.

In this implementation manner, the frame 14 is fixed between the step surface of the first step and the optical film 12 through the first rigid component, and is clamped on the step surface of the first step and the step surface of the second step through the first rigid component and the third elastic component under the elastic action of the third elastic component, that is, the frame 14 is fixed on the back plate 11 in a double manner, so that the problem of frame loosening caused by easy loosening of the frame 14 is avoided.

The first rigid component may be fixed between the step surface of the first step and the optical film 12 through a double sided adhesive tape, and of course, the first rigid component may also be fixed between the step surface of the first step and the optical film 12 through other manners, which is not specifically limited in the embodiment of the present application.

When the cross-section of the rim 14 is U-shaped, in yet another possible implementation, the rim 14 may include a fourth resilient member and a fourth rigid member. The fourth elastic member is fixed between the step surface of the first step and the optical film 12, and the bezel 14 can be clamped on the step surface of the first step and the step surface of the second step by the fourth rigid member and the fourth elastic member.

In this implementation manner, the frame 14 is fixed between the step surface of the first step and the optical film 12 through the fourth elastic member, and is clamped on the step surface of the first step and the step surface of the second step through the fourth rigid member and the fourth elastic member under the elastic force of the fourth elastic member, that is, the frame 14 is also fixed on the back plate 11 in a double manner, so that the problem of frame loosening caused by easy loosening of the frame 14 is avoided.

The fourth elastic member may be fixed between the step surface of the first step and the optical film 12 through a double sided adhesive tape, and of course, the fourth elastic member may also be fixed between the step surface of the first step and the optical film 12 through other manners, which is not specifically limited in the embodiment of the present application.

When the cross-section of the rim 14 is U-shaped, in yet another possible implementation, as shown in fig. 7, the rim 14 may include a second rigid member and a third rigid member. The frame 14 is clamped at the edge of the back plate 11 by a second rigid part and a third rigid part, the second rigid part being located between the back plate 11 and the optical membrane 12. In other words, the second rigid member is fixed between the step surface of the first step and the optical film 12, and the third rigid member is fixed on the step surface of the second step. The second rigid member may be fixed between the step surface of the first step and the optical film 12 through a double sided adhesive tape, and of course, the second rigid member may also be fixed between the step surface of the first step and the optical film 12 through other manners, which is not particularly limited in the embodiment of the present application. In addition, the third rigid member may be fixed to the step surface of the second step by a double sided adhesive tape, and of course, the third rigid member may be fixed to the step surface of the second step by other means, which is not particularly limited in the embodiment of the present application.

In other embodiments, the inner wall of the frame is in a stepped structure along the thickness direction, the edge of the back plate 11 is in a stepped structure along the thickness direction, and the step surface of the back plate 11 is fixedly connected with the step surface of the frame.

When the inner wall of the frame is of a stepped structure in the thickness direction, in one possible implementation, the step surface of the frame faces the direction of the optical film 12, and accordingly, the step surface of the back plate 11 may face a direction away from the optical film 12, and then the step surface of the back plate 11 and the step surface of the frame may be fixedly connected.

When the inner wall of the frame is in a stepped structure along the thickness direction, in another possible implementation, the step surface of the frame faces away from the optical film 12, and accordingly, the step surface of the back plate 11 may face the direction of the optical film 12, and then, the step surface of the back plate 11 and the step surface of the frame may be fixedly connected.

When the bezel wraps around the edges of the back plate and the optical film, in some embodiments, as shown in fig. 7, the inner wall of the frame is stepped in the thickness direction to form two inner annular surfaces. The first inner ring surface is fixedly connected with the side surface of the back plate 11, and the first inner ring surface refers to one inner ring surface, far away from the outer wall of the frame, of the two inner ring surfaces. The second inner ring surface is fixedly connected with the edge of the optical film 12, and the second inner ring surface refers to one inner ring surface, which is close to the outer wall of the frame, of the two inner ring surfaces.

The first inner ring surface may be fixedly connected to the side surface of the back plate 11 through a double-sided adhesive tape, and of course, the first inner ring surface may also be fixedly connected to the side surface of the back plate 11 through other manners, for example, the side surface of the back plate 11 may be fixedly connected to the first inner ring surface through a screw, which is not limited in the embodiment of the present application.

When the side surface of the back plate 11 is fixedly connected with the first inner annular surface through the screw, in some embodiments, a threaded hole may be provided on the side surface of the back plate 11, and a countersunk hole may be provided on the surface opposite to the first inner annular surface of the frame, so that the screw may pass through the threaded hole of the back plate 11 and be fixed with the frame, and the head of the screw may sink into the countersunk hole.

In addition, the second inner ring surface may be fixedly connected to the edge of the optical film 12 through a double sided tape, and of course, the second inner ring surface may also be fixedly connected to the edge of the optical film 12 through other manners, which is not specifically limited in the embodiment of the present application.

In other embodiments, as shown in fig. 5 and 6, the inner wall of the frame is stepped in the thickness direction to form two inner annular surfaces, and the edge of the back plate 11 is stepped in the thickness direction to form two outer annular surfaces. The first inner ring surface is fixedly connected with the first outer ring surface, the first inner ring surface refers to one inner ring surface far away from the outer wall of the frame in the two inner ring surfaces, and the first outer ring surface refers to one outer ring surface close to the center of the backboard 11 in the two outer ring surfaces. The second inner annular surface is fixedly connected with the second outer annular surface and the edge of the optical film 12 respectively, the second inner annular surface refers to one inner annular surface, close to the outer wall of the frame, of the two inner annular surfaces, and the second outer annular surface refers to one outer annular surface, far away from the center of the back plate 11, of the two outer annular surfaces.

The first inner ring surface and the first outer ring surface may be fixedly connected through a double sided adhesive tape, and of course, the first inner ring surface and the first outer ring surface may also be fixedly connected through other manners. In addition, the second inner annular surface may be fixedly connected to the second outer annular surface and the edge of the optical film 12 through double-sided adhesive tape, and of course, the second inner annular surface may also be fixedly connected to the second outer annular surface and the edge of the optical film 12 through other manners, which is not limited in the embodiment of the present application.

In addition, the area of the optical film 12 may be equal to the area of the area surrounded by the second inner ring surface of the frame. In other words, the edge of the optical film 12 can just abut against the second inner ring surface, so that a gap between the side surface of the optical film 12 and the second inner ring surface can be avoided, and foreign matters such as dust enter the gap between the optical film 12 and the back plate 11 through the gap, thereby affecting the display effect of the display screen.

Furthermore, the side surface of the optical film 12 and the second inner ring surface can be fixedly connected through a double sided adhesive, so that gaps between the side surface of the optical film 12 and the second inner ring surface can be further avoided, and further foreign matters such as dust can be better prevented from entering the display screen.

In some embodiments, as shown in fig. 7, the frame may include two surfaces disposed opposite to each other, where a first surface of the two surfaces is tapered, and the first surface is a surface on the same side of the optical film 12 away from the back plate 11. Thus, when the viewer looks at the display screen on the side of the optical film of the display screen, he can see that the first surface is tapered to the side of the optical film 12, and the existence of the first surface is weakened, so that a 'borderless' visual feeling is formed, and the viewing effect of the display screen is improved.

Wherein in some embodiments, a perpendicular distance between a surface of the optical film 12 away from the back plate 11 and a first intersection line is in a range of 0.1mm-0.6mm, and the first intersection line refers to an intersection line between the first surface and an outer wall of the frame. Of course, the perpendicular distance between the surface of the optical film 12 away from the back plate 11 and the first intersection line may also be located within other distance ranges, which is not limited in the embodiment of the present application.

In addition to the first intersection line formed between the first surface and the outer wall of the frame, the second intersection line formed between the first surface and the optical film 12 may be flush with the surface of the optical film 12 away from the back plate 11 in some embodiments, so that the entire display screen will look more neat. Of course, the second intersecting line formed between the first surface and the optical film 12 may not be flush with the surface of the optical film 12 away from the back plate 11, which is not limited in the embodiment of the present application.

It will be appreciated that the frame generally serves to protect the back plate 11 and the optical film 12 for the entire display screen, increasing the strength of the entire display screen and avoiding breakage of the display screen. That is, the strength of the frame affects the strength of the entire display screen.

Thus, the strength of the frame is critical to the strength of the display screen, and it is noted that the strength of the frame is determined by the ratio of the shear modulus to the weight of the frame, the greater the ratio of the shear modulus to the weight, the higher the strength of the frame. It can be seen that appropriate reduction of the weight of the frame increases the ratio of shear modulus to weight, which in turn increases the strength of the frame. Based on this, in some embodiments, the rim 14 of the frame may be a hollow structure. By providing the frame 14 comprised by the frame as a hollow structure, the weight of the frame can be reduced, thereby increasing the ratio of shear modulus to weight and enhancing the strength of the frame.

Wherein in some embodiments, the cross-section of the interior cavity of the bezel may be circular or rectangular. Of course, the cross section of the inner cavity may be other shapes, which are not particularly limited in the embodiment of the present application.

In other embodiments, the weight of the frame may be reduced by providing the first groove ring on the step surface of the frame, in particular, the first groove ring may be provided on the step surface of the frame, and correspondingly, the boss ring matched with the first groove ring may be provided on the step surface of the back plate 11, and the boss ring is clamped in the first groove ring. Thus, on one hand, the weight of the frame can be reduced by arranging the first groove ring, the strength of the frame is increased, and on the other hand, as the boss ring matched with the first groove ring is arranged on the step surface of the back plate 11, the first groove ring and the boss ring are mutually matched, so that the contact area between the back plate 11 and the frame can be increased, and the frame can be more firmly fixed on the back plate 11.

Further, a second groove ring may be provided on the surface of the frame opposite to the step surface of the frame, so that the weight of the frame can be further reduced, and the strength of the frame can be further increased.

In still other embodiments, to reduce the weight of the frame, the first inner annulus of the frame may be provided with a first saw-tooth structure in the thickness direction, and correspondingly, the side surface of the back plate 11 is provided with a second saw-tooth structure in the thickness direction, and the first saw-tooth structure and the second saw-tooth structure are matched with each other. In this way, in addition to the weight of the frame being reduced and the strength of the frame being increased, the contact area of the back plate 11 with the frame can be increased, so that the frame can be more firmly fixed to the back plate 11.

It should be noted that the above-mentioned manner of increasing the strength of the frame is only a few possible manners of increasing the strength of the frame according to the embodiment of the present application, and of course, the strength of the frame may be increased by other manners, that is, only the strength of the frame needs to be increased, and the manner of increasing the strength of the frame is not limited specifically in the embodiment of the present application.

In some embodiments, the rim 14 of the frame includes an insert. The insertion portion is vertically fixed on the second inner annular surface, the insertion portion is clamped between the optical film 12 and the back plate 11, and a gap between the optical film 12 and the back plate 11 can be sealed. In this way, when fine dust enters into the minute gaps between the frame and the back plate 11 and between the frame and the optical film 12, the effect at the insertion portion is small and cannot continue to enter into the gap between the optical film 12 and the back plate 11, so that it is possible to avoid the occurrence of a situation in which the fine dust seriously affects the display effect of the display screen.

In some embodiments, the thickness of the insertion portion in the thickness direction of the frame is not greater than 0.1mm, however, based on different application scenarios, the thickness of the insertion portion in the thickness direction of the frame may also be other values, and only the gap between the optical film 12 and the back plate 11 needs to be sealed, which is not limited in detail in the embodiment of the present application.

In addition, the material of the insertion portion may be elastic rubber, so that it can better function to seal the gap between the optical film 12 and the back plate 11. Of course, the material of the insertion portion may be other materials, which is not particularly limited in the embodiment of the present application.

In the embodiment of the application, the first connecting part is arranged on one side, far away from the optical membrane, of the backboard of the display screen, the second connecting part is correspondingly arranged on the mounting surface, and the display screen can be embedded and fixed on the mounting surface through the first connecting part and the second connecting part. After each first connecting part is fixedly connected with the corresponding second connecting part, the distance between one side, far away from the optical membrane, of the backboard and the mounting surface is smaller than 1mm, so that the display screen can only slightly shake within the range of 1mm, or is directly and stably attached to the mounting surface, and therefore, the display screen is prevented from shaking greatly, and the display effect of the display screen can be improved; in addition, the gap between the back plate and the mounting surface is small, so that the visible thickness of the side surface of the display screen can be reduced.

Fig. 8 illustrates a schematic structure of a projection apparatus according to an embodiment of the present application. As shown in fig. 8, the projection apparatus includes a projection host 3 and a display screen 1 as described in the above embodiment; the projection host 3 is positioned on one side of the display screen 1, which is close to the optical film 12 (not shown in the figure), and the light outlet of the projection host 3 faces the display screen 1; the projection host 3 is used for emitting light beams to the display screen 1, and the display screen 1 is used for receiving the light beams emitted by the projection host 3 and displaying pictures.

It should be noted that the structure of the display screen according to the embodiment of the present application may be the same as or similar to that of the display screen according to the above embodiment, which is not described herein.

In the embodiment of the application, the distance between one side of the backboard far away from the optical membrane and the mounting surface is smaller than 1mm, so that the display screen can only slightly shake within the range of 1mm, or can be directly and stably attached to the mounting surface, thus avoiding the large-amplitude shake of the display screen, namely ensuring the stability of the display screen. Therefore, when the projection host emits light beams to the display screen and displays pictures through the display screen, the projection effect of the projection equipment is improved.

The foregoing is illustrative of the present application and is not to be construed as limiting thereof, but rather, any modification, equivalent replacement, improvement or the like which comes within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims (9)

1. A display screen, the display screen comprising: back plate, optical film and frame;

the optical film is fixed on the backboard;

One side of the backboard far away from the optical membrane is provided with one or more first connecting parts, the backboard is used for being fixedly connected with one or more second connecting parts which are correspondingly arranged on the mounting surface through the one or more first connecting parts, and after each first connecting part is fixedly connected with the corresponding second connecting part, the distance between one side of the backboard far away from the optical membrane and the mounting surface is smaller than 1mm;

The frame wraps the edge of the backboard or wraps the edges of the backboard and the optical film;

the surface of the back plate, which is far away from the optical film, protrudes out of the frame, and the surface of the back plate, which is far away from the optical film, protrudes out of the frame or is flush with the frame.

2. The display screen of claim 1, wherein at least one groove is present in the one or more first connection portions, and correspondingly, at least one boss is present in the one or more second connection portions in one-to-one correspondence with the at least one groove.

3. The display screen of claim 1, wherein at least one boss is present in the one or more first connection portions, and correspondingly, at least one groove is present in the one or more second connection portions in a one-to-one correspondence with the at least one boss.

4. The display screen of claim 2, wherein each groove is a ring-like structure.

5. The display screen of claim 2, wherein each recess is a bar-like structure.

6. The display screen of claim 5, wherein the at least one groove is a plurality of grooves, the plurality of grooves are positioned on a same straight line, and a length direction of each groove is parallel to a horizontal plane.

7. The display screen of claim 5, wherein the at least one groove is distributed along a height direction of the back plate, and a length direction of each groove is parallel to a horizontal plane.

8. The display screen of claim 5, wherein each groove has a rectangular cross-sectional shape and corners of each groove are provided with rounded corners.

9. A projection device comprising a projection host and a display screen as claimed in any one of claims 1 to 8;

The projection host is positioned on one side of the display screen, which is close to the optical film, and the light outlet of the projection host faces to the display screen;

The projection host is used for emitting light beams to the display screen, and the display screen is used for receiving the light beams emitted by the projection host and displaying pictures.