CN113009762A - Display screen and projection equipment - Google Patents

Abstract

The application discloses display screen and projection equipment belongs to and shows technical field. The display screen includes: a back plate, an optical membrane and a frame; the optical film is fixed on the back plate. The frame comprises an extension part and an insertion part vertically connected with the extension part; the extension part wraps the edges of the back plate and the optical diaphragm; the insertion portion is clamped between the optical film and the back plate, and is capable of sealing a gap between the optical film and the back plate. The application provides a display screen, the clearance between optics diaphragm and the backplate has sealed through the portion of inserting, like this, when tiny dust enters into between frame and the backplate, when the small gap between frame and the optics diaphragm, can not continue to enter into the gap between optics diaphragm and the backplate, consequently can avoid the condition emergence of the display effect of these tiny dusts serious influences display screen.

Description

Display screen and projection equipment

Technical Field

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

Background

In recent years, in order to improve the aesthetic appearance of display screens, the display screens are being developed toward ultra-thinning. Since the display screen mainly includes the back plate and the optical film, it is now common to achieve ultra-thinning of the display screen by reducing the thickness of the back plate.

As shown in fig. 1, the display screen includes, in addition to a back plate 100 and an optical film 101, an adhesive layer 102 and a frame 103, the optical film 101 is adhered to the back plate 100 by the adhesive layer 102, and the frame 103 surrounds edges of the back plate 100, the adhesive layer 102 and the optical film 101 and wraps the optical film 101, the adhesive layer 102 and the back plate 100.

Disclosure of Invention

On the one hand, the application provides a display screen and projection equipment, can solve the problem that tiny dust enters into the gap between optics diaphragm and the backplate. The technical scheme is as follows:

there is provided a display screen including: a back plate, an optical membrane and a frame;

the optical diaphragm is fixed on the back plate;

the frame comprises an extension part and an insertion part vertically connected with the extension part;

the extension part wraps the edges of the back plate and the optical diaphragm;

the insertion portion is clamped between the optical film and the back plate, and is capable of sealing a gap between the optical film and the back plate.

Optionally, the surface of the optical film remote from the back plate protrudes out of the frame, and the surface of the back plate remote from the optical film protrudes out of the frame, or is flush with the frame.

Optionally, the insert comprises a first resilient member and a second resilient member;

the first side edge of the first elastic component and the first side edge of the second elastic component are fixedly connected with the extension part, the distance between the first side edge of the first elastic component and the first side edge of the second elastic component is smaller than or equal to the distance between the second side edge of the first elastic component and the second side edge of the second elastic component, the distance between the second side edge of the first elastic component and the second side edge of the second elastic component can be reduced under the action of external force, the first side edge of the first elastic component is opposite to the second side edge of the second elastic component, and the first side edge of the second elastic component is opposite to the second side edge of the second elastic component;

the first elastic component abuts against the surface, close to the back plate, of the optical diaphragm, and the second elastic component abuts against the surface, close to the optical diaphragm, of the back plate.

Optionally, the first elastic component includes a first substrate and one or more first strip-shaped protrusions;

the one or more first strip-shaped bulges are arranged on the surface, far away from the second elastic part, of the first substrate, the length direction of each first strip-shaped bulge is parallel to the length direction of the first substrate, and the one or more first strip-shaped bulges are abutted to the surface, close to the back plate, of the optical diaphragm.

Optionally, each first strip-shaped protrusion has a cross section in a shape of a barb.

Optionally, each first strip-shaped protrusion has a semicircular cross section.

Optionally, the cross-section of the extension is rectangular.

Optionally, the extension is a hollow structure.

Optionally, the cross-section of the lumen of the extension is circular or rectangular.

In another aspect, a projection device is provided, which includes a projection host and the display screen of the above aspect;

the projection host is positioned on one side, close to the optical film, of the display screen, and a light outlet of the projection host faces 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 beneficial effects brought by the technical scheme provided by the embodiment of the application at least can comprise:

in the embodiment of the application, because the insert part presss from both sides tightly between optics diaphragm and backplate, and can seal the clearance between optics diaphragm and the backplate, promptly, clearance between optics diaphragm and the backplate has sealed through the insert part, like this, enter into between frame and the backplate when tiny dust, when the tiny gap between frame and the optics diaphragm, little and can not continue to enter into in the gap between optics diaphragm and the backplate in the effect of insert part, consequently can avoid the condition that tiny dust seriously influences the display effect of display screen to take place.

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 schematic structural diagram of a display screen provided in the related art;

FIG. 2 is a partial cross-sectional view of a display screen provided in an embodiment of the present application;

fig. 3 is an exploded view of a display screen provided in an embodiment of the present application;

FIG. 4 is a cross-sectional view of a bezel provided in accordance with an embodiment of the present application;

FIG. 5 is a cross-sectional view of another bezel provided in accordance with an embodiment of the present application;

FIG. 6 is a cross-sectional view of yet another bezel provided in accordance with an embodiment of the present application;

FIG. 7 is a cross-sectional view of yet another bezel provided in accordance with an embodiment of the present application;

FIG. 8 is a cross-sectional view of yet another bezel provided in accordance with an embodiment of the present application;

FIG. 9 is a partial cross-sectional view of yet another display screen provided by an embodiment of the present application;

FIG. 10 is a partial cross-sectional view of yet another display screen provided by an embodiment of the present application;

FIG. 11 is a partial cross-sectional view of yet another display screen provided by an embodiment of the present application;

FIG. 12 is an exploded view of another display screen provided in an embodiment of the present application;

FIG. 13 is a partial cross-sectional view of yet another display screen provided by an embodiment of the present application;

FIG. 14 is a partial cross-sectional view of yet another display screen provided by an embodiment of the present application;

fig. 15 is an exploded view of still another display screen provided in an embodiment of the present application;

FIG. 16 is a schematic view of an installation of a display screen provided in an embodiment of the present application;

fig. 17 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.

Reference numerals:

related art reference numerals:

100: a back plate; 101: an optical film; 102: a bonding layer; 103: a frame;

the reference numbers of the present application:

1: a back plate; 2: an optical film; 3: a frame; 4: a mounting surface;

11: a first step; 12: a second step; 13: a first outer annular surface; 14: a second outer annulus; 15: a first connection portion; 41: a second connecting portion;

31: a frame; 32: a first inner annular surface; 33: a second inner annular surface; 34: a first surface;

311: an extension portion; 312: an insertion portion; 313: an inner cavity;

1000: a projection host; 2000: a display screen;

3121: a first elastic member; 3122: a second elastic member;

31211: a first substrate; 31212: a first strip-shaped bulge;

31221: a second substrate; 31222: the second strip-shaped bulge.

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.

Fig. 2 is a schematic structural diagram of a display screen provided in an embodiment of the present application, and fig. 3 is a schematic structural diagram of an explosion of the display screen provided in the embodiment of the present application. Referring to fig. 2 and 3, the display screen may include: a back plate 1, an optical membrane 2 and a frame 3. The optical film 2 is fixed on the back plate 1. The bezel 31 of the frame 3 includes an extension 311 and an insertion portion 312 perpendicular to the extension 311. The extension 311 wraps around the edges of the back plate 1 and the optical film 2. The insertion portion 312 is clamped between the optical film 2 and the back plate 1, and can seal a gap between the optical film 2 and the back plate 1.

In the embodiment of the present application, because the inserting portion 312 is clamped between the optical film 2 and the back plate 1, and the gap between the optical film 2 and the back plate 1 can be sealed, that is, the gap between the optical film 2 and the back plate 1 is sealed by the inserting portion 312, so that when fine dust enters the gap between the frame and the back plate and the small gap between the frame and the optical film, the effect of the inserting portion 312 is small and the fine dust cannot continuously enter the gap between the optical film and the back plate, and therefore the situation that the fine dust seriously affects the display effect of the display screen can be avoided.

The optical film 2 may be fixed on the back plate 1 by a double-sided adhesive tape, and certainly, the optical film 2 may also be fixed on the back plate 1 by other manners, which is not specifically limited in the embodiment of the present application. In addition, the extending portion 311 included in the frame 31 may be fixedly connected to the edge of the back panel 1 through a double-sided tape, and of course, the extending portion 311 may also be fixedly connected to the edge of the back panel 1 through other manners, which is not specifically limited in this embodiment of the application.

For example, the extension 311 may also be fixedly connected to the edge of the back plate 1 by a screw, and when the extension 311 is fixedly connected to the edge of the back plate 1 by a screw, a countersunk hole may be further disposed on the extension 311, so that the head of the screw may be hidden in the countersunk hole, and the overall appearance of the display screen is prevented from being affected.

In some embodiments, the surface of the optical film 2 remote from the back plate 1 protrudes out of the frame 3, and the surface of the back plate 1 remote from the optical film 2 protrudes out of the frame 3, or is flush with the frame 3. That is, the thickness of the frame 3 is smaller than the sum of the thicknesses of the optical film 2 and the back plate 1, in other words, the frame 3 does not affect the overall thickness of the display screen, and therefore, the display screen can be thinned by reducing the thicknesses of the optical film 2 and the back plate 1 alone.

In some embodiments, the optical film 2 is fixed on the back plate 1, 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 1 mm. The first projection is a projection of the back plate 1 and the frame 3 in the thickness direction of the back plate 1, and the second projection is a projection of the optical film 2 in the thickness direction of the back plate 1. The surface of the optical film 2 remote from the back plate 1 protrudes out of the frame 3, and the surface of the back plate 1 remote from the optical film 2 protrudes out of the frame 3, or is flush with the frame 3.

In some embodiments, the thickness of the insertion portion 312 is not greater than 0.1mm, and of course, based on different application scenarios, the thickness of the insertion portion 312 may also be other values, and only the gap between the optical film 2 and the back plate 1 needs to be sealed, which is not specifically limited in the embodiment of the present application.

Further, the material of the insertion portion 312 may be an elastic rubber, which can better function to seal the gap between the optical film 2 and the back plate 1. Of course, the material of the insertion portion 312 may be other materials, which is not specifically limited in the embodiments of the present application.

In some embodiments, referring to fig. 4, the insert 312 may include a first elastic member 3121 and a second elastic member 3122. The first side edge of the first elastic component 3121 and the first side edge of the second elastic component 3122 are fixedly connected to the bezel 31, a distance between the first side edge of the first elastic component 3121 and the first side edge of the second elastic component 3122 is less than or equal to a distance between the second side edge of the first elastic component 3121 and the second side edge of the second elastic component 3122, a distance between the second side edge of the first elastic component 3121 and the second side edge of the second elastic component 3122 can be reduced under an external force, the first side edge of the first elastic component 3121 is opposite to the second side edge, and the first side edge of the second elastic component 3122 is opposite to the second side edge. The first elastic member 3121 abuts on the surface of the optical film 2 close to the back plate 1, and the second elastic member 3122 abuts on the surface of the back plate 1 close to the optical film 2.

In other words, when the distance between the first side edge of the first elastic member 3121 and the first side edge of the second elastic member 3122 is smaller than the distance between the second side edge of the first elastic member 3121 and the second side edge of the second elastic member 3122, the cross-section of the insertion portion 312 may be approximately "V" shaped, and when the distance between the first side edge of the first elastic member 3121 and the first side edge of the second elastic member 3122 is equal to the distance between the second side edge of the first elastic member 3121 and the second side edge of the second elastic member 3122, the cross-section of the insertion portion 312 may be approximately "U" shaped.

When the insertion portion 312 is inserted between the optical film 2 and the backplate 1, in a possible implementation manner, an external force may be applied to the second side of the first elastic member 3121 and the second side of the second elastic member 3122, so that the distance between the second side of the first elastic member 3121 and the second side of the second elastic member 3122 is reduced under the external force, at this time, the second side of the first elastic member 3121 and the second side of the second elastic member 3122 may be integrally inserted between the optical film 2 and the backplate 1, at this time, the first elastic member 3121 will abut against the surface of the optical film 2 close to the backplate 1, and the second elastic member 3122 abuts against the surface of the backplate 1 close to the optical film 2, that is, the gap between the optical film 2 and the backplate 1 is sealed.

It should be noted that the first side edge of the first elastic component 3121 and the first side edge of the second elastic component 3122 may be fixedly connected by a double-faced adhesive and a frame 31, and of course, in some embodiments, the first side edge of the first elastic component 3121 and the first side edge of the second elastic component 3122 may also be integrally formed with the frame 31, which is not specifically limited in this embodiment of the application.

Further, in some embodiments, referring to fig. 5, the first elastic member 3121 may include a first base plate 31211, and one or more first strip-shaped protrusions 31212. The one or more first strip-shaped protrusions 31212 are disposed on a surface of the first substrate away from the second elastic member 3122, a length direction of each first strip-shaped protrusion 31212 is parallel to a length direction of the first substrate 31211, and the one or more first strip-shaped protrusions 31212 abut on a surface of the optical film sheet 2 close to the back plate 1. In this way, by providing one or more first strip-shaped protrusions 31212 on the first substrate 31211, the first elastic member 3121 can be better abutted against the optical film sheet 2, and thus a gap between the first elastic member 3121 and the optical film sheet 2 can be better sealed.

Likewise, in some embodiments, referring to fig. 5, the second elastic member 3122 may include a second base plate 31221, and one or more second strip-shaped protrusions 31222. One or more second strip-shaped protrusions 31222 are disposed on the surface of the second substrate 31221 away from the first elastic member 3121, and the length direction of each second strip-shaped protrusion 31222 is parallel to the length direction of the second substrate 31221, and the one or more second strip-shaped protrusions 31222 abut on the surface of the back plate 1 close to the optical film sheet 2. In this way, by providing one or more second strip-shaped protrusions 31222 on the second substrate 31221, the second elastic member 3122 can better abut against the back plate 1, and thus a gap between the second elastic member 3122 and the back plate 1 can be better sealed.

It should be noted that the number of the first strip-shaped protrusions 31212 and the number of the second strip-shaped protrusions 31222 may be 1, and certainly, the number of the first strip-shaped protrusions 31212 and the number of the second strip-shaped protrusions 31222 may also be other numbers, which is not specifically limited in this embodiment of the application.

In addition, referring to fig. 5 and 6, each of the first and second bar-shaped protrusions 31212 and 31222 may have a barb shape in cross section. Of course, the cross section of each of the first strip-shaped protrusion 31212 and the second strip-shaped protrusion 31222 may be in any other shapes such as a semi-circle, which is not specifically limited in this embodiment.

It will be appreciated that the frame 3 generally serves to protect the backplate 1 and optical diaphragm 2, increasing the strength of the display screen and avoiding breakage of the display screen throughout the display screen. That is, the strength of the frame 3 affects the strength of the entire display screen.

Therefore, the strength of the frame 3 is crucial to the strength of the display screen, and it is noted that the strength of the frame 3 is determined by the ratio of the shear modulus to the weight of the frame 3, and the greater the ratio of the shear modulus to the weight, the higher the strength of the frame 3. It can be seen that a suitable reduction in the weight of the frame 3 increases the ratio of shear modulus to weight, and thus the strength of the frame 3.

Based on this, in some embodiments, the extension 311 may be a hollow structure. When the extension 311 has a hollow structure, the weight of the frame 3 can be reduced, the ratio of the shear modulus to the weight can be increased, and the strength of the frame 3 can be enhanced.

Therein, in some embodiments, referring to fig. 7 and 8, the cross-section of the lumen 313 of the extension 311 may be circular or rectangular. Of course, the cross section of the inner cavity 313 of the extension 311 may have other shapes, which is not specifically limited in the embodiments of the present application.

In some embodiments, referring to fig. 9, the frame 31 of the frame 3 may be U-shaped in cross-section. When the cross section of the frame 31 is U-shaped, in a possible implementation manner, both sides of the edge of the back plate 1 are step-shaped, and the frame 31 is fixed at the edge of the back plate 1. That is, the surface of the back plate 1 close to the optical film 2 is provided with a first step 11 along the thickness direction, the surface of the back plate 1 far from the optical film 2 is provided with a second step 12 along the thickness direction, and the frame 31 is fixed at the edge of the back plate 1 through the step surface of the first step 11 and the step surface of the second step 12. In other words, the frame 31 with a U-shaped cross section may be firstly buckled on the step surfaces of the first step 11 and the second step 12, so as to fix the frame 31 on the edge of the back plate 1 through the step surfaces of the first step 11 and the second step 12.

It should be noted that the frame 31 may be fixed on the step surface of the first step 11 and the step surface of the second step 12 by double-sided tapes, respectively, so as to fix the frame 31 on the edge of the back plate 1. Of course, the frame 31 may also be fixed on the step surface of the first step 11 and the step surface of the second step 12 respectively in other manners, which is not specifically limited in this embodiment of the application.

In other embodiments, the inner wall of the frame 3 is in a step-like structure along the thickness direction, the edge of the backboard 1 is in a step-like structure along the thickness direction, and the step surface of the backboard 1 is fixedly connected with the step surface of the frame 3.

When the inner wall of the frame 3 is stepped in the thickness direction, in a possible implementation, referring to fig. 10, the step surface of the frame 3 faces the direction of the optical film 2, and accordingly, the step surface of the back plate 1 may face a direction away from the optical film 2, and then, the step surface of the back plate 1 and the step surface of the frame 3 may be fixedly connected.

When the inner wall of the frame 3 is stepped in the thickness direction, in another possible implementation manner, referring to fig. 11, the step surface of the frame 3 faces away from the optical film 2, and accordingly, the step surface of the back plate 1 may face the direction of the optical film 2, and then, the step surface of the back plate 1 and the step surface of the frame 3 may be fixedly connected.

In still other embodiments, referring to fig. 12 and 13, the inner wall of the frame 3 is stepped in the thickness direction to form two inner annular surfaces. The first inner ring surface 32 is fixedly connected with the side surface of the back plate 1, and the first inner ring surface 32 refers to one of the two inner ring surfaces far away from the outer wall of the frame 3. The second inner ring surface 33 is fixedly connected to the edge of the optical film 2, and the second inner ring surface 33 is one of the two inner ring surfaces close to the outer wall of the frame.

The first inner ring surface 32 may be fixedly connected to the side surface of the back plate 1 through a double-sided adhesive tape, of course, the first inner ring surface 32 may also be fixedly connected to the side surface of the back plate 1 through other manners, for example, the side surface of the back plate 1 may be fixedly connected to the first inner ring surface 32 through a screw, which is not specifically limited in this embodiment of the application.

When the side of the backplate 1 is fixedly connected to the first inner annular surface 32 by screws, in some embodiments, a threaded hole may be provided on the side of the backplate 1, and a countersunk hole may be provided on the opposite side of the first inner annular surface 32 of the frame 3, so that the screws may pass through the threaded holes fixed to the backplate 1 by the frame 3, and the heads of the screws may sink into the countersunk holes.

In addition, the second inner annular surface 33 may be fixedly connected to the edge of the optical film 2 through a double-sided adhesive tape, and of course, the second inner annular surface 33 may also be fixedly connected to the edge of the optical film 2 through other manners, which is not specifically limited in this embodiment of the application.

In still other embodiments, referring to fig. 14 and 15, the inner wall of the frame 3 is stepped in the thickness direction to form two inner annular surfaces, and the edge of the back plate 1 is stepped in the thickness direction to form two outer annular surfaces. The first inner annular surface 32 is fixedly connected to the first outer annular surface 13, the first inner annular surface 32 is one of the two inner annular surfaces that is far from the outer wall of the frame 3, and the first outer annular surface 13 is one of the two outer annular surfaces that is near the center of the backplate 1. The second inner ring surface 33 is fixedly connected with the second outer ring surface 14 and the edge of the optical diaphragm 2, the second inner ring surface 33 is one of the two inner ring surfaces close to the outer wall of the frame 3, and the second outer ring surface 14 is one of the two outer ring surfaces far away from the center of the back plate 1.

The first inner annular surface 32 and the first outer annular surface 13 may be fixedly connected by a double-sided tape, and certainly, the first inner annular surface 32 and the first outer annular surface 13 may also be fixedly connected by other manners, which is not specifically limited in this embodiment of the application. In addition, the second inner annular surface 33 may be fixedly connected to the edges of the second outer annular surface 14 and the optical film 2 through a double-sided adhesive tape, and of course, the second inner annular surface 33 may also be fixedly connected to the edges of the second outer annular surface 14 and the optical film 2 through other manners, which is not specifically limited in this embodiment of the application.

In addition, the area of the optical film 2 may be equal to the area of the region surrounded by the second inner annular surface 33 of the frame 3. In other words, the edge of the optical film 2 just can abut against the second inner annular surface 33, so that a gap between the side surface of the optical film 2 and the second inner annular surface 33 can be avoided, and foreign matters such as dust enter the gap between the optical film 2 and the back plate 1 through the gap, thereby affecting the display effect of the display screen.

Furthermore, the side surface of the optical film 2 and the second inner annular surface 33 can be fixedly connected through a double-sided adhesive tape, so that a gap between the side surface of the optical film 2 and the second inner annular surface 33 can be further avoided, and further, foreign matters such as dust can be better prevented from entering the display screen.

In some embodiments, referring to fig. 13, the frame may include two oppositely disposed surfaces, a first surface 34 of the two surfaces is in a tapered structure, and the first surface 34 refers to a surface on the same side as the surface of the optical film 2 away from the back plate 1. Thus, when the viewer looks at the display screen from the side where the optical film of the display screen is located, the first surface 34 can be seen to be tapered and gradually contracted to the side of the optical film 2, so that the existence sense of the first surface 34 is weakened, a 'frameless' visual perception is formed, and the viewing effect of the display screen is improved.

Wherein, in some embodiments, the perpendicular distance between the surface of the optical film 2 away from the back plate 1 and the first intersection line, which is the intersection line between the first surface 34 and the outer wall of the frame 3, is in the range of 0.1mm to 0.6 mm. Of course, the perpendicular distance between the surface of the optical film 2 away from the back plate 1 and the first intersection line may also be located in other distance ranges, which is not specifically limited in the embodiment of the present application.

In addition to the first intersection line formed between the first surface 34 and the outer wall of the frame 3, a second intersection line formed between the first surface 34 and the optical film 2 may be, in some embodiments, flush with the surface of the optical film 2 away from the back plate 1, so that the whole display screen can be seen more neatly. Of course, the second intersection line formed between the first surface 34 and the optical film 2 may not be flush with the surface of the optical film 2 away from the back plate 1, which is not specifically limited in the embodiment of the present application.

In some embodiments, as shown in fig. 16, one or more first connecting portions 15 are disposed on a side of the backplate 1 away from the optical film, the backplate 1 is configured to be fixedly connected to one or more second connecting portions 41 disposed on the mounting surface 4 in an embedded manner through the one or more first connecting portions 15, and after each first connecting portion 15 is fixedly connected to the corresponding second connecting portion 41, a distance between the side of the backplate 1 away from the optical film and the mounting surface 4 is less than 1 mm.

The mounting surface 4 may be a plane formed by fixing brackets or a wall surface of a wall body, as long as the fixing of the backboard 1 can be realized.

It should be noted that, in order to achieve stability of connection between the mounting surface 4 and the backplane 1, each first connection portion 15 may be seamlessly bonded to a corresponding one of the second connection portions 41.

Wherein each of the first connection parts 15 and the corresponding one of the second connection parts 41 may be adhered together by an adhesive. For example, the first connection portion 15 and the corresponding one of the second connection portions 41 may be adhered by a double-sided tape. Of course, the display screen 1 can be prevented from generating noise due to vibration by using an adhesive with buffering and vibration absorbing capabilities. For example, the first connection portion 15 and the corresponding one of the second connection portions 41 may be adhered by foam adhesive.

Of course, each first connection portion 15 and a corresponding one of the second connection portions 41 can be fixed together by adhesion, and can also be fixed together by magnetic attraction, so as to facilitate the separation of the backboard 1 from the mounting surface 4.

In some embodiments, there is at least one recess in one or more of the first connection portions 15, and correspondingly, there is at least one boss in one-to-one correspondence with the at least one recess in one or more of the second connection portions 41, each boss being capable of extending into a corresponding one of the recesses.

Wherein the depth of each groove may be between 0.5 and 0.75 times the thickness of the back plate 1. Thus, the problems that the depth of the groove is too shallow, which leads to insecurity in fixation, and the depth of the groove is too deep, which leads to insufficient strength of the back plate 1 can be avoided. Of course, the depth of each groove can be adjusted in a small range according to actual conditions, so long as the stable fixation of the screen can be ensured and the strength of the back plate 1 is proper, and the embodiment of the application does not limit the depth.

Wherein the boss may be fixed on the mounting surface 4 in advance by a fixing member, which may be a countersunk head screw, for example. Of course, the boss may also be integrally formed with the mounting surface 4, which may ensure greater stability of the boss and reduce assembly steps.

Wherein the grooves and the corresponding bosses may be arranged obliquely in a depth direction and a 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 projection can apply a supporting force to the groove perpendicular to the contact surface, and the supporting force has a component directed to the second connecting portion 41, which can further enhance the adhesion effect between the display screen 1 and the mounting surface 4, so that the display screen 1 can be more firmly fixed on the mounting surface 4.

In other embodiments, there is at least one boss in one or more of the first connection portions 15, and correspondingly, there is at least one recess in one-to-one correspondence with at least one boss in one or more of the second connection portions 41, each boss being capable of extending into a corresponding one of the recesses.

Wherein, the boss highly can be located the height threshold value within range along the thickness direction of backplate 1, and this height threshold value within range can have sufficient intensity for guaranteeing the boss when supporting display screen 1, and the difficult threshold value scope of deviating from in the recess of following of boss simultaneously.

Illustratively, the height threshold may range between 0.5 and 1.5 times the thickness of the backplate 1. Of course, the depth of the boss can be adjusted in a small range according to actual conditions, as long as enough strength can be ensured, and the embodiment of the application does not limit the depth.

Wherein the boss can be fixed on the back plate 1 by a fixing member, for example, a countersunk head screw. Of course, the boss may also be integrally formed with the back plate 1, so as to ensure that the boss has stronger stability, and reduce the number of assembling steps.

Wherein the grooves and the corresponding bosses may be arranged obliquely in a depth direction and a height direction, respectively. That is, the bottom end of the recess may be lower than the open end of the recess, and correspondingly the top end of the boss may be lower than the bottom end of the boss. Thus, the groove can apply a supporting force to the boss perpendicular to the contact surface, and the supporting force has a component directed to the second connecting portion 41, which can further enhance the adhesion effect of the display screen 1 and the mounting surface 4, so that the display screen 1 can be more firmly fixed on the mounting surface 4.

It should be noted that one or more grooves or one or more bosses may be disposed on the back plate 1, and certainly, the back plate may also be disposed in a combination of one or more grooves and one or more bosses, as long as the back plate 1 can be fixed, which is not limited in this embodiment of the application.

In two above embodiments, the height of every boss along the thickness direction of backplate 1 can slightly be less than the depth of a corresponding recess along the thickness direction of backplate 1, like this, stretch into a corresponding recess after every boss, the boss can hide in the recess completely to can guarantee that backplate 1 can laminate on installation face 4. In addition, the width of each boss corresponding to each groove can be slightly smaller than that of the corresponding groove, so that the installation is convenient.

Further, the width of each groove in the horizontal direction may be within a certain width threshold range, which may ensure a threshold range that may have a higher strength in the vertical direction when the display screen 1 is fixed by the bosses and the grooves. Illustratively, the threshold range may be between 1 and 2 times the groove depth. Of course, the width of each boss and each groove can be adjusted according to actual conditions, as long as the display screen 1 can be supported, the strength is high, and the embodiment of the application does not limit the width.

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

At least one groove can be located on the same straight line, 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 can also be distributed in the vertical direction, or the grooves are arrayed into a groove square matrix with multiple rows and multiple columns.

When the quantity of at least one recess is a plurality of, a plurality of recesses can disperse the stress on display screen 1, and the quantity of recess is more, and the effect that the stress dispersion is better.

It should be noted that the bottom surface of each cylindrical groove and the corners of the side walls of each cylindrical groove can be provided with arc chamfers, so that the arc chamfers can disperse stress at the corners in a small range, and further avoid the phenomenon of local stress concentration at the corners.

In other embodiments, each groove may be a stripe structure.

The strip-shaped first connecting portion 15 can increase the contact area between the backboard 1 and the mounting surface 4, and further uniformly disperse the stress on the backboard 1, 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 1 in the horizontal direction. Of course, the length of the strip-shaped groove can be adjusted according to actual conditions as long as the effect of dispersing stress can be achieved, and the embodiment of the application does not limit the length. Accordingly, the length of each boss may be slightly less than the length of the corresponding recess for ease of installation.

In addition, the length of the strip-shaped groove can be less than 0.5 times of the length of the back plate 1 along the horizontal direction. Thus, at least one groove can be positioned on the same straight line, 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 of the backboard 1.

In some embodiments, at least one groove may also be distributed along the height direction of the backboard 1, 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 backboard 1. Of course, the plurality of grooves may be distributed along the horizontal plane direction and along the height direction of the back plate 1, that is, the plurality of grooves may be arrayed into a groove square matrix with a plurality of rows and a plurality of columns.

The cross section of each groove can be rectangular, and certainly, 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 4 corresponding to the groove can also be rectangular, so that the structure of the groove and the boss is simpler, and the groove and the boss are convenient to process and mount. When the cross section of each groove is L-shaped, the cross section of the boss on the mounting surface 4 corresponding to the groove may also be L-shaped, and for convenience of mounting, the vertical height of the opening end of the groove may be greater than or equal to the overall height of the boss. In this way, the second connection portion 41 can simultaneously apply supporting force to the first connection portion 15 vertically upward and horizontally toward the mounting surface 4, so that the display screen 1 can be more stably supported by the cooperation of the second connection portion 41 and the first connection portion 15.

It should be noted that, when the strip-shaped groove is fixed to the corresponding boss, the shape of the cross section of the strip-shaped groove and the cross section of the boss can be adjusted to increase the contact area between the boss and the backplate 1 on the plane where the backplate 1 is located, so that the phenomenon of force dispersion can be realized through the boss.

It should be further noted that the corners of each adjacent sidewall of each strip-shaped groove and the corners of each adjacent sidewall of a corresponding boss can be provided with arc chamfers, so that the arc chamfers can disperse the stress at the corners to a small extent, and further avoid the phenomenon of local stress concentration at the corners.

In still other embodiments, each groove may be an annular structure.

The ring structure may be a circular ring structure, or may be a square ring structure or a ring structure having another shape.

When the grooves are of circular ring structures, if the diameter of the grooves is large, the number of the grooves can be one, that is, a large circular ring groove can be arranged on the back plate 1.

For example, the diameter of the ring of the larger annular groove may be 0.75 times the length of the back plate 1 in the horizontal direction, so that stress dispersion in a large range may be achieved, and of course, the diameter of the ring of the annular groove may be adjusted according to actual conditions as long as stress dispersion may be achieved, which is not limited in this embodiment of the present application.

If the diameter of recess is less, the quantity of recess can be a plurality of, and a plurality of recesses set up on backplate 1 with the mode of array this moment, like this, can realize the homodisperse to stress on backplate 1. In addition, the plurality of grooves may also be arranged in a distribution form of a plurality of concentric circles, as long as the stress on the back plate 1 can be uniformly dispersed, which is not limited in the embodiment of the present application.

It should be noted that the corners of each adjacent sidewall of each annular groove and the corners of each adjacent sidewall of a corresponding boss may be provided with arc chamfers, so that the arc chamfers may disperse the stress at the corners to a small extent, thereby avoiding the local stress concentration at the corners.

Of course, at least one of the grooves may be configured in other shapes besides being configured in a column, a bar, or a ring structure, as long as the purpose of supporting the display screen 1 and dispersing stress can be achieved, which is not limited in the embodiment of the present application.

It should be noted that, when at least one first connection portion 15 of one or more first connection portions 15 is a boss, the shape of the boss may be similar to the structure and the shape of the groove discussed above, and of course, the boss may also be provided in other shapes, which is not limited in this embodiment of the application.

In the embodiment of the application, because the insert part presss from both sides tightly between optics diaphragm and backplate, and can seal the clearance between optics diaphragm and the backplate, promptly, clearance between optics diaphragm and the backplate has sealed through the insert part, like this, enter into between frame and the backplate when tiny dust, when the tiny gap between frame and the optics diaphragm, little and can not continue to enter into in the gap between optics diaphragm and the backplate in the effect of insert part, consequently can avoid the condition that tiny dust seriously influences the display effect of display screen to take place. In addition, the frame included by the frame is arranged to be a hollow structure, so that the strength of the frame is increased, and the strength of the display screen is further increased.

Fig. 10 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application. Referring to fig. 10, the projection apparatus includes a projection host 1000 and a display screen 2000 provided in any of the above embodiments. The host projector 1000 is located on one side of the display screen 2000 close to the optical film, and the light outlet of the host projector 1000 faces the display screen 2000. The host projector 1000 is configured to emit a light beam to the display screen 2000, and the display screen 2000 is configured to receive the light beam emitted by the host projector 1000 and perform image display.

The display screen 2000 according to the embodiment of the present application can be as described in the above embodiments, and the embodiment of the present application is not described herein again.

In the embodiment of the application, the inserting part that display screen includes presss from both sides tightly between optics diaphragm and backplate, and can seal the clearance between optics diaphragm and the backplate, promptly, clearance between optics diaphragm and the backplate has sealed through the inserting part, like this, enter into between frame and the backplate when tiny dust, when the tiny gap between frame and the optics diaphragm, little and can not continue to enter into the gap between optics diaphragm and the backplate at the effect of inserting part, consequently, can avoid the condition emergence that tiny dust seriously influences display screen's display effect. In addition, the frame included by the frame is arranged to be a hollow structure, so that the strength of the display screen is increased, and the dustproof performance and the strength of the projection equipment are better.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A display screen, characterized in that the display screen comprises: a back plate, an optical membrane and a frame;

the optical diaphragm is fixed on the back plate;

the frame comprises an extension part and an insertion part vertically connected with the extension part;

the extension part wraps the edges of the back plate and the optical diaphragm;

the insertion portion is clamped between the optical film and the back plate, and is capable of sealing a gap between the optical film and the back plate.

2. A display screen according to claim 1 wherein the surface of the optical film remote from the back plate protrudes out of the frame and the surface of the back plate remote from the optical film protrudes out of the frame or is flush with the frame.

3. A display screen according to claim 1 wherein the insert comprises a first resilient member and a second resilient member;

the first side edge of the first elastic component and the first side edge of the second elastic component are fixedly connected with the extension part, the distance between the first side edge of the first elastic component and the first side edge of the second elastic component is smaller than or equal to the distance between the second side edge of the first elastic component and the second side edge of the second elastic component, the distance between the second side edge of the first elastic component and the second side edge of the second elastic component can be reduced under the action of external force, the first side edge of the first elastic component is opposite to the second side edge of the second elastic component, and the first side edge of the second elastic component is opposite to the second side edge of the second elastic component;

the first elastic component abuts against the surface, close to the back plate, of the optical diaphragm, and the second elastic component abuts against the surface, close to the optical diaphragm, of the back plate.

4. A display screen according to claim 3 wherein the first resilient member comprises a first substrate and one or more first strip-like projections;

the one or more first strip-shaped bulges are arranged on the surface, far away from the second elastic part, of the first substrate, the length direction of each first strip-shaped bulge is parallel to the length direction of the first substrate, and the one or more first strip-shaped bulges are abutted to the surface, close to the back plate, of the optical diaphragm.

5. A display screen according to claim 4, characterised in that each first strip-like projection is barb-shaped in cross-section.

6. A display screen according to claim 4, characterised in that each first stripe-like projection is semi-circular in cross-section.

7. A display screen according to claim 1 wherein the extension is rectangular in cross-section.

8. A display screen according to claim 1 or 7 wherein the extension is hollow.

9. A display screen according to claim 8 wherein the cavity of the extension is circular or rectangular in cross-section.

10. A projection device, characterized in that the projection device comprises a projection host and the display screen of any one of the preceding claims 1-9;

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

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