CN215297867U - Display device and spliced screen - Google Patents

Abstract

The application discloses display device and concatenation screen, display device includes: the backlight source provides backlight for the display panel, the display panel comprises a light incident surface and a light emergent surface, and the backlight source is arranged on one side of the light incident surface of the display panel; the back plate is arranged on one side of the backlight source far away from the display panel, and the backlight source is arranged on the back plate; the backlight module comprises a back plate, a light source and a backlight source, wherein the back plate comprises a bottom plate and an extension part, one end of the bottom plate is bent along the light emitting direction to form the extension part, the side edge of the display panel is exposed outside the back plate, and the back plate and the extension part wrap the backlight source; one side of the optical film layer facing the display panel is completely adhered to the display panel; the extending part is abutted with the optical film layer; the extension part is provided with a buffer adhesive tape on one side abutted to the optical film layer. By the scheme, frameless display is realized.

Description

Display device and spliced screen

Technical Field

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

Background

With the progress of society, the display technology is continuously improved, and people have higher and higher requirements on the display, and the full-screen or frameless display can display a larger visual range, has better overall appearance and is more and more favored by people. The frame of the display panel is gradually narrowed, for example: the narrow-frame television narrows the non-display area at the edge of the display panel, and even achieves the effect of frameless display.

Taking a thin film transistor liquid crystal display panel as an example, in the existing narrow-frame display panel, a liquid crystal panel, a backlight module and a front frame are tightly attached through a glue frame to form a narrow frame, and a frame zero gap cannot be achieved. Therefore, how to solve the problem of the frame gap is very important.

Disclosure of Invention

The application aims at providing a display device and a spliced screen, and frameless display is achieved through reducing gaps.

The application discloses display device, display device includes: the display panel comprises a light incident surface and a light emergent surface, and the backlight source is arranged on the back plate; the backlight source comprises a back plate, a display panel and a backlight source, wherein the back plate comprises a bottom plate and an extension part, at least one end of the bottom plate is bent along a light emergent direction to form the extension part, the side edge of the display panel is exposed outside the back plate, and the back plate and the extension part wrap the backlight source; one side of the optical film layer, which faces the display panel, is in full-fit bonding with the display panel; the extension part is abutted with the optical film layer; and a buffer adhesive tape is arranged on one surface of the extending part, which is abutted to the optical film layer.

Optionally, one side of the extending portion, which is close to the backlight source, is provided with a reflective adhesive tape, and the reflective adhesive tape has a reflective function.

Optionally, the optical film layer includes a diffusion plate and an optical film, the optical film is bonded to the display panel in a full-bonding manner, the diffusion plate is bonded to the optical film in a full-bonding manner, the extension portion abuts against the diffusion plate, a buffer adhesive tape is arranged on one surface of the extension portion abutting against the diffusion plate, and a gap exists between the diffusion plate and the backlight source.

Optionally, the display device further includes a black encapsulation glue, the side of the optical film layer is flush with the side of the display panel, the black encapsulation glue covers the side of the optical film and the side of the display panel, and the length of the extension portion is smaller than the distance from the bottom plate to the display panel.

Optionally, the extending portion includes a first supporting portion and a second supporting portion connected to each other, and an edge of the display panel protrudes out of a side edge of the optical film layer; the first supporting part is abutted against the display panel, and a buffer adhesive tape is arranged between the first supporting part and the display panel; the second supporting part is abutted against the diffusion plate, and a buffer adhesive tape is arranged between the second supporting part and the optical film layer; the first supporting portion is arranged on one side, away from the optical film layer, of the second supporting portion, and the second supporting portion is arranged between the optical film layer and the first supporting portion.

Optionally, one side of the first supporting portion, which is close to the optical film layer, is provided with a reflective adhesive tape, and one side of the second supporting portion, which is close to the backlight source, is provided with a reflective adhesive tape.

Optionally, the side edge of the display panel and the side edge of the first supporting portion are on the same plane.

Optionally, the optical film layer includes an optical film, the optical film is bonded to the display panel in a full-bonding manner, the backlight source is a lateral backlight source, the lateral backlight source includes a light bar and a light guide plate, the light bar is disposed on the extension portion, the light guide plate is disposed on the back plate, and the light guide plate is bonded to the optical film in a full-bonding manner.

Optionally, the display panel includes a first liquid crystal panel and a second liquid crystal panel, and the first liquid crystal panel and the second liquid crystal panel are attached to each other through an optical adhesive.

The application also discloses a spliced screen which comprises a support and at least two display devices.

Compare in the narrow frame display panel who supports display panel in frame and the preceding frame of adopting to glue, this application supports display panel through adopting the backplate to remove gluey frame and preceding frame, and the bottom plate sets up in the bottom, and the extension can set up respectively around the bottom plate, and the backplate wholly forms an opening, sets up the backlight in the opening, sets up display panel outside the opening, and the support of display panel is supported by extension all around. And the side edge of the display panel and the side edge of the extension part are in the same plane, namely the edge of the display panel is aligned with the edge of the extension part. And then realize complete frameless display panel, can call it as the suspension screen again, and this kind of suspension screen, under the condition that is applicable to the concatenation screen, does not have other structures between two display panel's the edge, for example: no structures such as a front frame and a rubber frame are arranged on the side edge of the display panel. The splicing gap can be effectively reduced when the two display panels are spliced into one display.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic cross-sectional view of a display device of a first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a display device of a second embodiment of the present application;

fig. 3 is a schematic cross-sectional view of a display device of a third embodiment of the present application;

fig. 4 is a schematic cross-sectional view of a first display device of a fourth embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a second display device of a fourth embodiment of the present application;

fig. 6 is a schematic view of a tiled screen of a fifth embodiment of the present application.

10, splicing the screen; 11. a support; 12. a display device; 100. a display panel, 101, a light-emitting surface; 102. a light incident surface; 103. black packaging glue; 104. a first liquid crystal panel; 105. a first liquid crystal panel; 110. an optical film layer; 111. an optical film; 112. a diffusion plate; 120. a backlight source; 121. a light bar; 122. a light guide plate; 130. a back plate; 131. a base plate; 132. an extension portion; 133. a first support section; 134. a second support portion; 140. buffering the adhesive tape; 141. a reflective tape; 142. and (3) optical cement.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application is described in detail below with reference to the figures and alternative embodiments.

The first embodiment is as follows:

as shown in fig. 1, as a first embodiment of the present application, there is disclosed a display device 12, the display device 12 including: the display panel 100 comprises a display panel 100, an optical film layer 110, a backlight source 120 and a back plate 130, wherein the backlight source 120 provides backlight for the display panel 100, the display panel 100 comprises a light incident surface 102 and a light emitting surface 101, and the backlight source 120 is arranged on one side of the light incident surface 102 of the display panel 100; the back plate 130 is disposed on a side of the backlight 120 away from the display panel 100, and the backlight 120 is disposed on the back plate 130. The back plate 130 includes a bottom plate 131 and an extending portion 132, at least one end of the bottom plate 131 is bent along a light exit direction to form the extending portion 132, a side of the display panel 100 is exposed outside the back plate 130, and the back plate 130 and the extending portion 132 wrap the backlight 120; the optical film layer 110 is fully attached and bonded to the display panel 100 towards one side of the display panel 100; the extending portion 132 abuts against the optical film layer 110; a buffer tape 140 is disposed on a surface of the extension portion 132 abutting against the optical film layer 110.

Compared with the narrow-bezel display panel 100 that supports the display panel 100 by using the rubber frame and the front frame, the display panel 100 is supported by using the back plate 130 by removing the rubber frame and the front frame, it should be noted that the back plate 130 and the extension portion 132 can be integrally formed, the bottom plate 131 is disposed at the bottom, the extension portions 132 can be disposed around the bottom plate 131 respectively, the back plate 130 integrally forms an opening, the backlight 120 is disposed in the opening, the display panel 100 is disposed outside the opening, and the display panel 100 is supported by the extension portions 132 around the opening. The side of the display panel 100 and the side of the extension portion 132 are in the same plane, that is, the edge of the display panel 100 is aligned with the edge of the extension portion 132. Thus, a completely frameless display panel 100, which may also be referred to as a floating screen, is realized, and in case of a floating screen, there are no other structures between the edges of the two display panels 100, such as: no front frame, rubber frame, etc. are provided at the side of the display panel 100. Therefore, the two display panels 100 of the present application can effectively reduce the splicing gap when spliced into a display.

The display panel 100 includes various display panels 100, but the liquid crystal display panel 100 requiring the backlight 120 is mainly, for example, a TN (Twisted Nematic) display panel 100, an IPS (In-Plane Switching) display panel 100, a VA (Vertical Alignment) display panel 100, or an MVA (Multi-Domain Vertical Alignment) display panel 100. The display panel 100 generally includes an array substrate, a color filter substrate, and a liquid crystal layer (not shown) disposed between the two substrates.

As shown in fig. 1, the display device 12 further includes a reflective tape 141 disposed on a side of the extension portion 132 close to the backlight 120, wherein the reflective tape 141 having a reflective function is disposed on an inner side of the extension portion 132. The reflective tape 141 can reflect a large-angle light of the backlight 120, for example, a light irradiated to the inner side of the extension portion 132, and reflect the light back, thereby increasing the brightness of the backlight 120. In the case that the extension portion 132 is disposed around the back plate 130, the reflective tape 141 may be disposed around the backlight 120.

Specifically, the display device 12 may include an optical film layer 110, the optical film layer 110 is disposed between the display panel 100 and the backlight 120, the optical film layer 110 and the display panel 100 are attached by an optical adhesive 142, and the extending portion 132 abuts against the optical film layer 110. The backlight 120 in this embodiment is a direct-type backlight 120, the optical film layer 110 includes an optical film 111 and a diffusion plate 112, respectively, the optical film 111 is disposed between the display panel 100 and the diffusion plate 112, and the optical film 111 plays a role in making light emitted from the backlight 120 more uniform, making the light utilization higher, and protecting the diffusion plate 112 in some cases. The diffuser plate 112 converts a point light source or a line light source array into a surface light source. The diffusion plate 112 mainly functions to diffuse incident light sufficiently, and has a good shielding effect on a lamp shadow, thereby achieving a softer and more uniform light source. The optical film 110 includes a diffuser plate 112 and an optical film 111, the optical film 111 is bonded to the display panel 100, the diffuser plate 112 is bonded to the optical film 111, the extension portion 132 abuts against the diffuser plate 112, a buffer tape 140 is disposed on one surface of the extension portion 132 abutting against the diffuser plate 112, and a gap exists between the diffuser plate 112 and the backlight 120. The backlight 120 and the diffuser 112 do not need to be supported by a support pillar, which is the function of supporting the backlight 120 and the diffuser 112 in a conventional direct-type backlight, for the purposes of the present application, the diffuser 112 is abutted on the extension 132 and passes through the extension 132. For the backlight source 120, a common light source and a mini-LED (sub-millimeter light emitting diode) light source can be selected, and the mini-LED light source inherits the characteristics of high efficiency, high brightness, high reliability, quick response time and the like of the common light source, has the characteristic of self-luminescence without the backlight source 120, is small in size, light and thin, and can easily realize the effect of energy conservation.

For the present embodiment, the optical film 111 and the display panel 100 are bonded together, and the diffusion plate 112 and the optical film 111 are bonded together, specifically, the diffusion plate 112 and the optical film 111 are bonded together by the optical glue 142, and the optical film 111 and the display panel 100 are also bonded together by the optical glue 142, so that the diffusion plate 112, the optical film 111, and the display panel 100 form an integral structure. Since the display panel 100 generally uses a glass substrate or the like, which has rigidity, and is attached by the optical adhesive 142, the optical film 111 in the optical film 110 will not collapse due to the unsupported bottom. And in this integral structure: the edges of the diffuser plate 112, the optical film 111, and the display panel 100 are aligned, and the sides of the whole structure are shielded by the light shielding layer covering the diffuser plate 112, the optical film 111, and the display panel 100. The optical adhesive 142 is preferably an OCA (optically Clear adhesive) optical adhesive 142, and the OCA optical adhesive 142 has the characteristics of being colorless and transparent, having a light transmittance of more than 90%, having good bonding strength, being curable at room temperature or at intermediate temperature, having small curing shrinkage, and the like; accordingly, glare and loss of emitted light can be reduced by using the OCA optical cement 142, providing higher transmittance, thereby increasing the brightness of the display panel 100; meanwhile, the contrast ratio is increased by using the OCA optical cement 142, especially under the irradiation of strong light.

In addition, higher strength can be achieved by surface bonding of the OCA optical paste 142, and the strength after bonding of the display panel 100 and the optical film 111 and the strength after bonding of the optical film 111 and the diffusion plate 112 are ensured. The extension portion 132 abuts against the diffusion plate 112 through the buffer tape 140, the buffer tape 140 can be made of black buffer tape 140, since the back plate 130 is made of hard material and directly contacts with the film layer or the diffusion plate 112 of the display panel 100, the film layer or the diffusion plate 112 or the optical film 111 of the display panel 100 is easily broken, the buffer structure can reduce the impact force of the direct contact of the hard material, and the buffer tape 140 is made of black material and has a certain light shielding effect, and the buffer tape 140 has a buffer function and is a double-sided tape, which can stick the extension portion 132 and the diffusion plate 112 together, so that the whole body formed by the display panel 100, the optical film and the diffusion plate 112 is fixed with the extension portion 132.

Specifically, the display device 12 further includes a black encapsulation adhesive 103, a side of the optical film layer 110 is flush with a side of the display panel 100, the black encapsulation adhesive 103 covers the side of the optical film 111 and the side of the display panel 100, and a length of the extension portion 132 is smaller than a distance from the bottom plate 131 to the display panel 100. Generally, black glue is selected, and the glue treatment has the function of light leakage prevention. At least three sides of the display panel 100 of the present application may be provided with the extending portion 132 directly abutting against the diffusion plate 112, and the three sides are all non-terminal sides. For the terminal side of the circuit board to be bonded, a space is required to be reserved for accommodating the circuit board, so that the display panel 100 with no frame on three sides can be formed in the present embodiment. For the terminal side, the borderless can be achieved by folding the circuit board to the back plate 130.

Example two:

as shown in fig. 2, as a second embodiment of the present application, there is disclosed a display device 12, the display device 12 including: the display panel 100 comprises a display panel 100, an optical film layer 110, a diffusion plate 112, a backlight source 120 and a back plate 130, wherein the backlight source 120 provides backlight for the display panel 100, and the display panel 100 comprises a light incident surface 102 and a light emitting surface 101; one end of the back plate 130 is bent along the light emitting direction and then extends to form an extending portion 132, and the extending portion 132 is abutted to the light incident surface 102 of the display panel 100. The details of the display panel 100, the optical film 111 in the optical film 110, and the diffusion plate 112 are as set forth in the first embodiment, and are not repeated herein. The difference from the previous embodiment is that: the edge of the display panel 100 is not aligned with the edge of the optical film layer 110, and the edge of the display panel 100 protrudes out of the side of the optical film layer 110;

correspondingly, the extending portion 132 includes a first supporting portion 133 and a second supporting portion 134 connected to each other, the first supporting portion 133 is disposed on a side of the second supporting portion 134 away from the optical film layer 110, the second supporting portion 134 is disposed between the optical film layer 110 and the first supporting portion 133, the first supporting portion 133 abuts against the display panel 100, and a buffer tape 140 is disposed between the first supporting portion 133 and the display panel 100; the second supporting portion 134 abuts against the optical film layer 110, and a buffer adhesive tape 140 is disposed between the second supporting portion 134 and the optical film layer 110; the first supporting part 133 is disposed at one side of the optical film layer 110, and a light shielding layer is disposed at one side of the display panel 100.

The first supporting portion 133 and the second supporting portion 134 form a step surface, and a height surface corresponding to the step surface is formed between the display panel 100 and the optical film 110. For the second embodiment, the diffusion plate 112 and the optical film 111 are supported by the second supporting portion 134 in an abutting manner, the inner side of the first supporting portion 133 directly abuts against the optical film 110, and the buffer tape 140 is further disposed on the surface of the first supporting portion 133 abutting against the display panel 100, and the display panel 100 and the optical film 110 are integrated with each other, so that the connection between the backplate 130 and the display panel 100 and the optical film 110 is tighter.

As shown in fig. 2, the side of the display panel 100 is coplanar with the side of the first supporting portion 133, and the side of the optical film 110 is coplanar with the side of the second supporting portion 134. The second supporting portion 134 of this application is close to one side and the bottom plate 131 lug connection of bottom plate 131, but integrated into one piece, and the one end that first supporting portion 133 is close to bottom plate 131 can not extend to be connected with bottom plate 131, only need extend to second supporting portion 134 and be connected with second supporting portion 134 can. Of course, the first support 133 may extend toward the bottom plate 131 and be connected to the bottom plate 131.

In an optional embodiment, a reflective tape 141 is disposed on a side of the first supporting portion 133 close to the optical film layer 110, and a reflective tape 141 is disposed on a side of the second supporting portion 134 close to the backlight source 120. The reflective tape 141 having a light reflecting function is disposed inside the extension portion 132. The reflective tape 141 can reflect a large-angle light of the backlight 120, for example, a light irradiated to the inner side of the extension portion 132, and reflect the light back, thereby increasing the brightness of the backlight 120.

Example three:

as shown in fig. 3, as a third embodiment of the present application, a display device 12 is disclosed, in which the display panel 100, and the back plate 130 of the display device 12 may adopt the design of the first or second embodiment, but the backlight 120 may use a side-in type light source, and the corresponding optical film layer 110 may use a side-in type optical film 111. The backlight 120 is a side-in type backlight 120, the side-in type backlight 120 includes a light bar 121 and a light guide plate 122, the light bar 121 is disposed on the extension portion 132, the light guide plate 122 is disposed on the back plate 130, and the light guide plate 122 and the optical film 111 are completely bonded.

Example four:

fig. 4 is a further modification of the first embodiment, and as a fourth embodiment of the present application, discloses a display device 12, the display device 12 including: the liquid crystal display panel comprises a display panel 100, an optical film 110, a backlight 120 and a back plate 130, wherein the optical film 110, the backlight 120 and the back plate 130 are the same as in the first embodiment, and the difference is that the display panel 100 comprises a first liquid crystal panel 104 and a second liquid crystal panel 105, the first liquid crystal panel 104 and the second liquid crystal panel 105 are attached to each other through an optical adhesive 142, and an optical gain structure, such as an optical gain film, may also be provided.

Fig. 5 is a further modification of the second embodiment, and discloses, as a modification of the fourth embodiment of the present application, a display device 12, the display device 12 including: the liquid crystal display panel comprises a display panel 100, an optical film layer 110, a backlight 120 and a back plate 130, wherein the optical film layer 110, the backlight 120 and the back plate 130 are the same as those in the embodiment, and the difference is that the display panel 100 comprises a first liquid crystal panel 104 and a second liquid crystal panel 105, the first liquid crystal panel 104 and the second liquid crystal panel 105 are attached to each other through an optical adhesive 142, and an optical gain structure, such as an optical gain film, may also be provided.

In this embodiment, the first display panel 100 and the second display panel 100 may be the same type of panel, for example, the first display panel 100 and the second display panel 100 are both UD (Ultra High Definition) panels, or the first display panel 100 and the second display panel 100 are both FHD (Full High Definition) panels. Of course, it is also possible that the first display panel 100 and the second display panel 100 are two different types of display panels 100. Of course, the third embodiment of the present application may also adopt the design of the dual-layer display panel 100, which is not described herein.

Example five:

as shown in fig. 6, as a fifth embodiment of the present application, a tiled display is disclosed, which includes a bracket and a display device 12 of any one of the four embodiments, and the display device 12 includes at least two pieces, and the display devices 12 are tiled by the bracket. In the case of being suitable for a tiled screen, only the black packaging adhesive 103 exists between the edges of the two display panels 100, and no front frame, adhesive frame, or other structure is disposed on the side of the display panel 100. Therefore, when the two display panels 100 are spliced into a display, the splicing gap can be effectively reduced.

It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims (10)

1. A display device, comprising: the display panel comprises a light incident surface and a light emergent surface, the backlight source is arranged on the back plate,

the back plate comprises a bottom plate and an extension part, at least one end of the bottom plate is bent along the light emitting direction to form the extension part, the side edge of the display panel is exposed outside the back plate, and the back plate and the extension part wrap the backlight source; one side of the optical film layer, which faces the display panel, is in full-fit bonding with the display panel;

the extension part is abutted with the optical film layer; and a buffer adhesive tape is arranged on one surface of the extending part, which is abutted to the optical film layer.

2. The display device according to claim 1, wherein a side of the extension portion adjacent to the backlight source is provided with a reflective tape, and the reflective tape has a reflective effect.

3. The display device according to claim 1, wherein the optical film layer includes a diffuser plate and an optical film, the optical film is bonded to the display panel, the diffuser plate is bonded to the optical film, the extension abuts against the diffuser plate, a buffer tape is disposed on a surface of the extension abutting against the diffuser plate, and a gap exists between the diffuser plate and the backlight source.

4. The display device according to claim 3, further comprising a black encapsulation adhesive, wherein a side of the optical film layer is flush with a side of the display panel, and the black encapsulation adhesive covers the side of the optical film and the side of the display panel, and a length of the extending portion is less than a distance from the bottom plate to the display panel.

5. The display device according to claim 4, wherein the extension portion comprises a first support portion and a second support portion connected to each other, and an edge of the display panel protrudes from a side of the optical film layer;

the first supporting part is abutted against the display panel, and a buffer adhesive tape is arranged between the first supporting part and the display panel;

the second supporting part is abutted against the diffusion plate, and a buffer adhesive tape is arranged between the second supporting part and the optical film layer;

the first supporting portion is arranged on one side, away from the optical film layer, of the second supporting portion, and the second supporting portion is arranged between the optical film layer and the first supporting portion.

6. The display device according to claim 5, wherein a side of the first supporting portion adjacent to the optical film layer is provided with a reflective tape, and a side of the second supporting portion adjacent to the backlight source is provided with a reflective tape.

7. The display device according to claim 5, wherein a side edge of the display panel is in the same plane as a side edge of the first support portion.

8. The display device according to claim 1, wherein the optical film layer comprises an optical film, the optical film is bonded to the display panel in a full-bonding manner, the backlight source is a lateral backlight source, the lateral backlight source comprises a light bar and a light guide plate, the light bar is disposed on the extension portion, the light guide plate is disposed on the back plate, and the light guide plate is bonded to the optical film in a full-bonding manner.

9. The display device according to any one of claims 1 to 8, wherein the display panel comprises a first liquid crystal panel and a second liquid crystal panel, and the first liquid crystal panel and the second liquid crystal panel are bonded by an optical adhesive.

10. A tiled screen comprising a frame and at least two display devices according to any of the preceding claims 1-9.

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