CN113287159A

CN113287159A - Curved surface display device and vehicle

Info

Publication number: CN113287159A
Application number: CN201980003157.0A
Authority: CN
Inventors: 张宇; 李会艳; 耿仕新; 王伯长
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-08-20
Anticipated expiration: 2039-12-20
Also published as: CN113287159B; WO2021120161A1

Abstract

A curved surface display device and a vehicle, the curved surface display device includes: a display panel (100); a first middle frame (200) located on a non-display side of the display panel (100) and configured to carry the display panel (100); a backlight assembly (300) positioned at a side of the first middle frame (200) far away from the display panel (100) and including an optical film (310) and a second middle frame (320), the second middle frame (320) positioned at a side of the optical film (310) far away from the display panel (100) and configured to support the optical film (310); and a back plate (400) positioned at a side of the backlight assembly (300) away from the display panel (100). The back panel (400) includes a bottom panel (410) and side panels (420) disposed at edges of the bottom panel (410), and the second middle frame (320) is coupled to the bottom panel (410). The curvature precision of the display device is improved by arranging the two middle frames in the curved surface display device and fixing the second middle frame on the bottom plate of the back plate.

Description

Curved surface display device and vehicle

Technical Field

At least one embodiment of the present disclosure relates to a curved surface display device and a vehicle.

Background

The curved surface display device can form a display area with a curved surface shape, and when the curved surface display device is applied to a large-size display device, the difference between the visual angle of a user watching the middle part of the display area and the visual angle of the user watching the edge of the display area can be reduced, so that a better display effect is realized.

Disclosure of Invention

At least one embodiment of the present disclosure provides a curved surface display device and a vehicle. The curved surface display device comprises a display panel, a first middle frame, a backlight assembly and a back plate. The first middle frame is positioned on the non-display side of the display panel and is configured to bear the display panel; the backlight assembly is positioned on one side, away from the display panel, of the first middle frame and comprises an optical film and a second middle frame, and the second middle frame is positioned on one side, away from the display panel, of the optical film and is configured to support the optical film; at least part of the back plate is positioned at one side of the backlight assembly far away from the display panel. The back plate comprises a bottom plate and side plates arranged at the edges of the bottom plate, and the second middle frame is connected to the bottom plate.

In some examples, the bottom plate includes a bottom wall and a first support portion located outside an edge of the bottom wall, the first support portion being located on a side of the bottom wall facing the display panel, the first support portion having a first support surface facing the display panel, the second middle frame includes a second support portion having a second support surface facing the display panel to support the optical film, the second support portion being disposed on the first support surface of the first support portion.

In some examples, the second support portion of the second middle frame and the first support portion are fixed to each other in a direction perpendicular to the first support surface by a first fixing member.

In some examples, the second support portion includes a fixing hole penetrating through the second support portion in a direction perpendicular to the first support surface, the first fixing member is located in the fixing hole, and in a direction parallel to the first support surface, a size of the fixing hole is larger than a size of the first fixing member so that a gap is provided between the first fixing member and an inner side wall of the fixing hole.

In some examples, the material of the second middle frame has a hardness greater than the hardness of the material of the first middle frame.

In some examples, a side of the first bezel remote from the display panel is pressed against the optical film.

In some examples, the bottom wall includes two first edges opposite to each other, the first edges being arc-shaped edges; the first supporting portion comprises a first arc-shaped strip portion corresponding to the first edge, and the bending direction of the first arc-shaped strip portion is the same as that of the first edge.

In some examples, the fixing hole is a circular hole, and a size of the fixing hole is larger than a size of the first fixing piece in a direction parallel to a diameter of the circular hole.

In some examples, the fixing hole is an elliptical hole having a major axis direction parallel to the first side, and a size of the fixing hole is larger than a size of the first fixing member in a direction parallel to the first side.

In some examples, the bottom plate further includes a connecting portion connecting an edge of the bottom wall and the first support portion, the first support portion extending outward from an edge of the connecting portion.

In some examples, the backlight assembly further includes a light source assembly including light emitting diodes arranged in an array, and a reflector sheet positioned at a light emitting surface of the light source assembly and exposing the light emitting diodes, the light source assembly being disposed on a side of the bottom wall close to the display panel.

In some examples, the second middle frame further comprises an extension part connected with the second support part and partially positioned inside the connecting part of the back plate, and the extension part extends towards the direction close to the bottom wall; the end part of the extending part far away from the second supporting part is pressed against the periphery of the reflecting sheet.

In some examples, an edge of the extending portion connected to the second supporting portion is located at an outer side of an edge of the extending portion pressed against the reflective sheet, and an edge of the extending portion connected to the second supporting portion is located at a side of an end of the extending portion pressed against the reflective sheet close to the display panel, so that an inner side surface of the extending portion is formed as an inclined surface, and a reflectivity of the inclined surface is not less than a reflectivity of the reflective sheet.

In some examples, the bottom wall includes two second sides opposite to each other, the second sides are straight sides, the light emitting diodes are located on the plurality of striped lamp panels, and an extending direction of each striped lamp panel is parallel to the second sides.

In some examples, the backlight assembly further includes at least one adapter plate located on a side of the bottom wall facing the display panel, and each adapter plate is connected with at least two strip-shaped lamp panels to provide driving signals for the strip-shaped lamp panels.

In some examples, the bottom wall further comprises two first edges opposite to each other, the first edges being arc-shaped edges; the connecting part is provided with a strip-shaped wire outlet hole, the part of the bottom wall, which is provided with the strip-shaped wire outlet hole, is connected with the first edge, which is close to the adapter plate, of the bottom wall, and the long axis of the strip-shaped wire outlet hole is parallel to the first edge.

In some examples, the curved display device further includes a light source driving board located on a side of the bottom wall away from the display panel, and the adapter board is connected to the light source driving board through a wire led out from the strip-shaped wire outlet hole.

In some examples, one side of the bottom wall, which is far away from the display panel, is provided with an arc-shaped reinforcing rib, the extending direction of the arc-shaped reinforcing rib is the same as the extending direction of the first edge, and the strength of the arc-shaped reinforcing rib is greater than that of the bottom wall so as to prevent the bottom wall from being deformed.

In some examples, the side plate extends from an outer edge of the first support portion toward the display panel, and the first middle frame includes an outer frame surrounding the display panel, and a portion of the outer frame is located outside the side plate and fixedly connected to the side plate.

In some examples, the first middle frame includes a third supporting portion configured to bear the display panel, the third supporting portion has a third supporting surface facing the display panel, and buffering members are disposed on the third supporting surface and an inner side of the outer frame wrapping the display panel.

In some examples, the curved display device further includes: the front frame is positioned on one side, away from the backlight assembly, of the first middle frame and is configured to press the display panel and the surface, away from the bottom plate side, of the outer frame of the first middle frame so as to guarantee the curvature of the display panel and the first middle frame.

In some examples, the front frame includes a front frame side wall located on the outer frame and far away from the side plate, the front frame side wall includes an elongated hole, so that the front frame side wall is fixedly connected to the side plate through a second fixing member penetrating through the elongated hole, a short axis of the elongated hole is substantially perpendicular to the first supporting surface, and a size of the second fixing member is substantially equal to a size of the short axis along an extending direction of the short axis.

In some examples, the display panel includes four sides connected one to form four corners, and the side plate is provided with a groove around a side facing the third support surface at a position of at least one of the four corners of the display panel.

In some examples, the material of the first middle frame is a light blocking material.

In some examples, the curved display device is an in-vehicle curved display device.

At least one embodiment of the present disclosure provides a vehicle including the curved surface display device.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1A is an exploded view of a curved display device according to an embodiment of the present disclosure;

FIG. 1B is a cross-sectional view of the curved display device shown in FIG. 1A in an assembled state;

FIG. 2A is a schematic plan view of the back plate shown in FIG. 1A;

FIG. 2B is a schematic cross-sectional view taken along line AA of FIG. 2A;

FIG. 2C is an enlarged schematic view of the position B in FIG. 2A;

FIG. 3A is a first cross-sectional view of the assembled structure of the back plate and the backlight assembly shown in FIG. 1A;

FIG. 3B is a second cross-sectional view of the assembled structure of the back plate and the backlight assembly shown in FIG. 1A;

fig. 3C is an enlarged plan view illustrating a connection between the second middle frame and the first support portion in an example of the embodiment of the disclosure;

FIG. 3D is a schematic cross-sectional view taken along line CC' of FIG. 3C;

fig. 3E is an enlarged plan view illustrating a second middle frame coupled to the first support portion in another example of the embodiment of the disclosure;

FIG. 3F is a schematic side view of the second middle frame shown in FIG. 3A;

FIG. 4A is a schematic view of a partial plan view of the second middle frame and the optical film shown in FIG. 3A after being assembled;

FIG. 4B is a schematic plan view of the optical film shown in FIG. 4A;

fig. 5A is a schematic plan view of the stripe-shaped lamp panel in the light source assembly shown in fig. 1A and 1B;

fig. 5B is a schematic plan view of the adapter plate connected to the strip-shaped lamp panel shown in fig. 5A;

FIG. 5C is a schematic view of the assembly of the back plate and the light source assembly of the curved display device shown in FIG. 1A;

FIG. 5D is a plan view of a side of the back plate away from the display panel of the curved display device shown in FIG. 1A;

FIG. 5E is a partial side view of the connection portion of the back plate shown in FIG. 1A;

FIG. 6A is a schematic partial cross-sectional view illustrating the assembly of the first middle frame, the backlight assembly and the back plate of the curved display device shown in FIG. 1A;

FIG. 6B is a schematic plan view of the first middle frame shown in FIG. 1A;

FIG. 6C is an enlarged schematic view of the position D in FIG. 6B;

FIG. 6D is a side view of the first middle frame of FIG. 6C;

FIG. 7A is a schematic plan view of the front frame shown in FIG. 1A;

FIG. 7B is a schematic view of the front frame sidewall of the front frame shown in FIG. 7A;

FIG. 7C is an enlarged schematic view of the front frame shown in FIG. 7A at position E;

FIG. 7D is a schematic view of a portion of the front frame and the back plate shown in FIG. 1A;

fig. 8 is a schematic view illustrating a curvature tolerance relationship of a curved display device according to an embodiment of the disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The use of "parallel," "perpendicular," and "the same" features in the embodiments of the disclosure includes both "parallel," "perpendicular," "the same," and the like in the strict sense, as well as the use of "substantially parallel," "substantially perpendicular," "substantially the same," and the like, including the use of certain errors, which, in view of the error associated with the measurement in question and the measurement of a particular quantity (i.e., the limitations of the measurement system), are meant to be within the acceptable range of deviation for the particular value as determined by one of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, or within 10% or 5% of the stated value.

In the research, the inventors of the present application found that: a curved display device comprises a middle frame, wherein the middle frame is used for supporting a display panel in the display device and has a shading effect on the periphery of the display panel. One side of the middle frame, which is far away from the display panel, is provided with an optical diaphragm, and the edge of the optical diaphragm comprises a plurality of openings which are sleeved on a plurality of bulges arranged at the upper edge of the side wall of the back plate, so that the edge of the optical diaphragm is fixed. Because the thermal expansion coefficient of optical diaphragm and the thermal expansion coefficient of the metal material of backplate differ more, when deformation such as expend with heat and contract with cold takes place for both, the laminating effect of the edge of optical diaphragm and the lateral wall top edge of backplate can worsen, leads to optical diaphragm to take place the fold, and then influences display device's display effect. In addition, the portion of the optical film other than the edge may be supported by a plurality of light supporting columns provided on a side thereof away from the display panel. Since the light supporting column only plays a role of supporting the optical film without being fixedly connected with the optical film, when the curved display device is used in a vehicle (e.g., an automobile), a problem of poor vibration reliability may occur. For example, when the curved display device is used in a vehicle, friction and collision occur between the light supporting columns and the optical film, which not only causes noise and abnormal sound, but also causes defects such as white spots and bright lines on the display screen due to scratching of the optical film.

Another curved display device includes a middle frame for supporting an optical film and a display panel, which is required to have a large hardness, and a supporting portion of the middle frame for supporting the optical film has a large thickness, so that when the display device is tested in an environment such as high temperature and high humidity, the expansion and contraction amount of the material of the middle frame is increased, for example, when the middle frame expands, the middle frame interferes with other structures such as a front frame, and a light leakage problem occurs; when the middle frame shrinks, the fixed gap between the middle frame and the optical film is reduced, and the film wrinkles occur, so that the display picture is poor. In addition, the upper edge of the middle frame and the upper edge of the side wall of the back plate realize coarse positioning through a hanging buckle structure and the like, and the fixing mode of the middle frame and the side wall of the back plate can cause larger assembly tolerance and further influence the curvature precision of the display device. In addition, the middle frame in the curved display device has a thicker thickness, which not only increases the difficulty of processing and forming, but also causes the problem that the middle frame is difficult to deform and is difficult to match with the curvature of the backboard in the fixing process of the middle frame and the backboard.

In addition, the curvature accuracy of the whole curved surface display device is affected by the curvature tolerance of the back plate, the middle frame, the front frame and other parts in the curved surface display device, so the curvature accuracy of the current large-size curved surface display device is only 10%.

An embodiment of the present disclosure provides a curved surface display device, including: the display device comprises a display panel, a first middle frame, a backlight assembly and a back panel. The first middle frame is positioned on the non-display side of the display panel and is configured to bear the display panel; the backlight assembly is positioned on one side of the first middle frame, which is far away from the display panel, and comprises an optical film and a second middle frame, wherein the second middle frame is positioned on one side of the optical film, which is far away from the display panel and is configured to support the optical film; at least part of the back plate is positioned at one side of the backlight assembly far away from the display panel. The back plate comprises a bottom plate and side plates arranged at the edges of the bottom plate, and the second middle frame is connected to the bottom plate. The two middle frames are arranged in the curved surface display device, and the second middle frame is fixed on the bottom plate of the back plate to minimize the assembly tolerance, so that the curvature precision of the display device is improved.

The curved surface display device and the vehicle provided by the embodiment of the disclosure are described below with reference to the drawings.

Fig. 1A is an exploded schematic view of a curved display device according to an embodiment of the present disclosure, and fig. 1B is a cross-sectional view of the curved display device shown in fig. 1A in an assembled state. As shown in fig. 1A and 1B, the curved display device includes a front frame 600, a display panel 100, a first middle frame 200, a backlight assembly 300, and a rear plate 400 in this order.

For example, as shown in fig. 1A and 1B, the curved display device may include a display panel that may be a liquid crystal display panel. The liquid crystal display panel may include an array substrate (not shown), a counter substrate (not shown), and a liquid crystal layer (not shown) between the array substrate and the counter substrate.

For example, one side of the array substrate facing the opposite substrate may include a plurality of gate lines extending in one direction and a plurality of data lines extending in another direction, the plurality of gate lines and the plurality of data lines being arranged to cross to define a plurality of pixel units arranged in an array. Each pixel unit may include a pixel electrode and a thin film transistor, the gate line is connected to a gate electrode of the thin film transistor to control the thin film transistor to be turned on or turned off, the pixel electrode is connected to one of source and drain electrodes of the thin film transistor, the data line is connected to the other of the source and drain electrodes of the thin film transistor, and the data line inputs a voltage signal required for displaying a picture to the pixel electrode through the thin film transistor to realize display of the array substrate.

For example, the opposite substrate may be a color film substrate, and a color film layer corresponding to the pixel unit and a black matrix covering the gate lines, the data lines, and the like in the non-display region may be disposed on one side of the color film substrate facing the array substrate. For example, a common electrode disposed opposite to the pixel electrode may be disposed on a side of the color filter substrate facing the array substrate, and the common electrode is configured to apply a common voltage to generate an electric field with the pixel electrode for driving liquid crystal molecules in the liquid crystal layer to deflect. The liquid crystal molecules are deflected to change the transmittance of the liquid crystal layer, thereby realizing display of a desired gray-scale image.

For example, the display panel 100 may further include a first polarizer disposed at a side of the array substrate away from the opposite substrate and a second polarizer disposed at a side of the opposite substrate away from the array substrate. The first polarizer includes a transmission axis extending in a first direction and polarizes a backlight incident thereto in the first direction. The second polarizer includes a transmission axis extending in a second direction and polarizes light incident to the second polarizer in the second direction. For example, the transmission axis of the first polarizer and the transmission axis of the second polarizer are perpendicular to each other.

For example, as shown in fig. 1A and 1B, the backlight assembly 300 is located at the non-display side of the display panel 100 to provide backlight for the display panel 100. For example, the backlight assembly 300 provided by the embodiment of the present disclosure may be a direct-type backlight assembly, and includes a light source assembly 330, an optical film 310 located between the light source assembly 330 and the display panel 100, and a reflective sheet 340 located on a side of the light source assembly 330 facing the optical film 310.

For example, the light source assembly 330 includes light emitting diodes arranged in an array.

For example, the optical film 310 may include a diffusion plate, a first diffusion sheet, a prism layer, and a second diffusion sheet, which are sequentially stacked in a direction from the light source assembly 330 toward the display panel 100.

For example, the diffuser plate may be made of a light-transmitting material such as polymethyl methacrylate (PMMA) or Polycarbonate (PC), and has a relatively thick thickness and a light transmittance of 50% to 80%. For example, the first diffusion sheet is made of a material such as polyethylene terephthalate (PET) or polycarbonate, and is disposed on a side of the diffusion plate away from the light source assembly, so as to distribute light more uniformly. For example, the prism layer can be a sawtooth or wavy polymethyl methacrylate microstructure, and has a good light-gathering effect. For example, the second diffuser sheet may be a protective prism layer made of a material having a high transmittance and a low haze level.

A certain light mixing distance is provided between the light source assembly 330 and the diffusion plate so that the light emitted from the light source assembly 330 and the diffusion plate form uniform energy distribution therebetween. For example, the first diffusion sheet, the prism layer, and the second diffusion sheet are configured to uniformly extract light emitted from the light source assembly 330.

For example, in order to improve the utilization rate of the light source, the backlight assembly 300 may further include a reflective sheet 340, and the reflective sheet 340 is located on the light emitting surface of the light source assembly 330 and exposes the leds, that is, the reflective sheet 340 includes open regions corresponding to the leds one to expose the leds.

For example, the back plate 400 serves to support the light source assembly 330.

As shown in fig. 1A and 1B, the first middle frame 200 is located at the non-display side of the display panel 100, i.e., the first middle frame 200 is located between the display panel 100 and the backlight assembly 300, and is configured to carry the display panel 100. The backlight assembly 300 further includes a second middle frame 320 positioned at a side of the optical film 310 away from the display panel 100, the second middle frame 320 being configured to support the optical film 310. The curved display device provided by the embodiment of the present disclosure further includes a back plate 400 disposed on a side of the backlight assembly 300 away from the display panel 100, the back plate 400 includes a bottom plate 410 and a side plate 420 disposed at an edge of the bottom plate 410, and the second middle frame 320 is connected to the bottom plate 410 of the back plate 400. The above-mentioned "the second middle frame 320 is connected to the bottom plate 410 of the back plate 400" means that the second middle frame is in contact with the bottom plate, and the second middle frame is fixedly connected with the bottom plate in at least one direction. This disclosure is through setting up two center in curved surface display device, only fixes the second center on the bottom plate of backplate, can realize the assembly tolerance minimizing, and then improves display device's camber precision.

For example, fig. 2A is a schematic plan view of the back plate shown in fig. 1A, and fig. 2B is a schematic cross-sectional view taken along line AA shown in fig. 2A. As shown in fig. 1A-2B, the bottom plate 410 and the side plate 420 of the back plate 400 form an accommodation space to accommodate the backlight assembly 300. The bottom plate 410 of the back plate 400 includes a bottom wall 411 and a first support 413 outside an edge of the bottom wall 411. The bottom plate 410 further includes a connection portion 412 connecting an edge of the bottom wall 411 and a first support portion 413, the first support portion 413 extending outward from an edge of the connection portion 412.

For example, the backlight assembly 300 includes the light source assembly 330 and the reflective sheet 340 both on a side surface of the bottom wall 411 facing the display panel 100, and the bottom wall 411 is used for carrying the light source assembly 330 and the reflective sheet 340.

The bottom wall 411 in the embodiment of the present disclosure is a curved structure for maintaining the display panel 100 with a predetermined curvature. When the curved display device provided by the embodiment of the present disclosure is used for viewing, the bottom wall may be concavely curved, that is, an edge of the bottom wall is curved toward a side facing the display panel.

For example, as shown in fig. 1A-2B, the bottom wall 411 includes two first sides 4111 opposite to each other, and the first sides 4111 are curved sides, such as arc-shaped sides, so that the bottom wall 411 has a curved structure. For example, the bottom wall 411 further includes second edges 4112 opposite to each other, and the embodiment is described by taking the second edges 4112 as straight edges. However, the second edge may be a curved edge as long as the bottom wall enclosed by the first edge and the second edge is a curved surface structure. FIG. 2B is a schematic cross-sectional view of a back plate taken along a plane parallel to the second edge according to an embodiment of the present disclosure, from FIG. 2B it can be seen that the bottom wall extends substantially along a straight line in a direction along the second edge. The first edge and the second edge refer to edges defined by portions of the bottom wall that meet the connecting portion.

For example, when the display device provided by the embodiment of the disclosure is a large-sized display device, for example, when the size is greater than 40 inches, the length of the arc-shaped first edge 4111 is longer than that of the straight-shaped second edge 4112, so as to achieve a better display effect.

For example, as shown in fig. 1A-2B, in an embodiment of the present disclosure, an arc-shaped stiffener 500 is disposed on a side of the bottom wall 411 away from the display panel 100, an extending direction of the arc-shaped stiffener 500 is the same as an extending direction of the first edge 4111, and strength of the arc-shaped stiffener 500 is greater than strength of the bottom wall 411 to effectively constrain the bottom wall 411, so as to prevent the bottom wall 411 from deforming, and further ensure curvature of the bottom wall 411. That is, the arc-shaped reinforcing ribs 500 are provided on the side of the bottom wall 411 away from the display panel 100 to prevent the bottom wall 411 from being deformed. For example, the arc-shaped reinforcing rib 500 may be an electrogalvanized steel plate and have a thickness of 2mm, and the bottom wall 411 may be aluminum and have a thick bottom of 1.5 mm.

For example, as shown in fig. 1A-2B, the arc-shaped reinforcing rib 500 may be located at the edge of the bottom wall 411 extending along the extending direction of the first edge 4111 to better ensure the curvature of the bottom wall.

Of course, when the second edge of the bottom wall is also set to be arc-shaped, the side of the bottom wall far away from the display panel can also be provided with an arc-shaped reinforcing rib extending along the extending direction of the second edge to further ensure the curvature of the bottom wall.

For example, the arc-shaped reinforcing ribs 500 may be connected to the bottom wall by fasteners, such as screws or bolts.

For example, the arc-shaped reinforcing rib 500 may be disposed at two edges of the bottom wall 411 on the side far from the display panel 100, extending along the extending direction of the first edge 4111, so as to better ensure the curvature of the bottom wall 411.

For example, as shown in fig. 1A-2B, each arc-shaped reinforcing rib 500 may include a central portion 501 and an edge portion 502 fixed to the bottom wall 411, and a certain distance may be provided between the central portion 501 and the bottom wall 411, that is, a hollow structure may be provided in the central portion 501, so that the weight may be reduced while the strength and curvature are ensured.

For example, the arc-shaped reinforcing ribs 500 are made of a material with hardness higher than that of the material of the back plate to reinforce the strength of the back plate and prevent the deformation of the back plate from affecting the curvature accuracy of the display device.

In this embodiment, the arc-shaped reinforcing rib located at each edge is taken as an example of a continuous reinforcing rib, but the present invention is not limited thereto, and the arc-shaped reinforcing rib located at any edge may also include a plurality of sub-reinforcing ribs separated from each other, as long as the reinforcing rib can play a role in ensuring the curvature of the bottom wall, and the number and the shape of the arc-shaped reinforcing ribs are not limited in the embodiment of the present disclosure.

For example, when the display device in the embodiment of the present disclosure is used in scenes such as vehicle-mounted displays or commercial displays, a plurality of support columns (not shown in the drawings) may be disposed on a side of the arc-shaped reinforcing ribs away from the bottom wall to fix the display device. For example, in the extending direction of the arc-shaped reinforcing bar, a plurality of support columns are provided at the center portion of the arc-shaped reinforcing bar to fix the curved surface display device to a vehicle.

For example, as shown in fig. 2A, for example, the connection part 412 may be a structure that surrounds the bottom plate 410 by one turn, and the connection part 412 is used to form a light mixing cavity between the light source assembly 330 and the optical film 310 so as to form a certain light mixing distance between the light source assembly 330 and the optical film 310. For example, the connection portions may be disposed only at the positions of the two first edges of the bottom wall, that is, the connection portions connected to the bottom wall are not disposed at the positions of the second edge of the bottom wall, and the first support portion includes only the bent portions corresponding to the two first edges.

For example, as shown in fig. 1A-2B, the connecting portion 412 is located at an edge of the bottom wall 411 and extends toward a side of the bottom wall 411 facing the display panel 100. For example, the end of the connecting portion 412 far from the bottom wall 411 is located outside the connecting position of the connecting portion 412 and the bottom wall 411 so as to facilitate the integral molding of the bottom wall and the connecting portion. The embodiments of the present disclosure are not limited thereto, and the connecting portion may also be perpendicular to the second side of the bottom wall as long as the connection of the bottom wall and the first supporting portion can be achieved.

For example, as shown in fig. 1A-2B, the bottom plate 410 further includes a first support part 413 extending outward from an edge of the connection part 412 away from the bottom wall 411, and the first support part 413 is located on a side of the bottom wall 411 facing the display panel 100.

For example, the first support part 413 may be a continuous ring structure surrounding the display panel to support a second middle frame mentioned later. Of course, the first support portion is not limited to this, and may have a discontinuous annular structure as long as the effect of supporting the second middle frame is achieved.

As shown in fig. 1A-2B, the annular first supporting portion 413 includes a first arc-shaped strip portion 4131 corresponding to the first side 4111, and the first arc-shaped strip portion 4131 is bent in the same direction as the first side 4111. The bottom wall in the embodiment of the disclosure adopts a curved surface structure, and the first edge of the bottom wall is an arc-shaped edge, so that the first supporting part connected with the first edge of the bottom wall through the connecting part is formed into a first arc-shaped strip-shaped part with an arc shape.

For example, the back plate in the embodiment of the present disclosure may be formed by an integral die-casting or punch forming process, and the bottom plate of the back plate may be an integral structure, that is, the bottom wall, the connecting portion and the first supporting portion are an integral structure, so that the first arc-shaped strip portion of the first supporting portion is formed while the curved bottom wall is formed. For example, the back plate may be formed by a stamping process, and when the back plate is formed by the stamping process, the resilience is large, and an additional structure is required to ensure the curvature; the back plate can also be manufactured by adopting a die-casting type forming process (molten iron in a molten state flows into a designed model and is cooled and formed) so as to reduce the rebound rate and the dehydration rate of the formed material.

For example, the material of the back plate can be selected from aluminum or electro-galvanized steel plate. The material of the back plate can be based on the requirement of actual product power consumption on heat dissipation performance, and when the display device has special requirement on temperature (for example, when the white light brightness of the display device is 1000 nits, the requirement on the temperature of the back plate is not higher than 48 ℃), aluminum can be selected as the material of the back plate; when the display device has no special requirements, the electro-galvanized steel plate can be selected as the material of the back plate to reduce the cost. For example, the thickness of the bottom wall may be 1.5 millimeters, which is not limited by the embodiments of the present disclosure.

For example, as shown in fig. 1A-2B, the first support part 413 has a first support surface 4130 facing the display panel 100, and the first support surface 4130 is used for supporting the second middle frame 320. For example, the first support surface may be a continuous annular surface.

In the specification of the present disclosure, the first support surface of the first support portion refers to a plane provided on a side of the first support portion facing the second middle frame to support the second middle frame, and the first support surface is defined as such a plane in order to better explain a positional relationship of other components with the first support surface, but does not mean that the side surface of the first support portion is necessarily a plane. For example, in the case where the side surface of the first support part has the convex structures, the first support surface as a plane may be a plane located at the bottoms of the convex structures or a plane passing through a point on the side surface of the first support part. In the direction perpendicular to the first support surface, a direction from the opposite side of the first support surface of the first support portion to the first support surface is referred to as an "upward" direction, and a direction from the first support surface to the opposite side of the first support surface of the first support portion is referred to as a "downward" direction. Thus, the various positional relationships modified by "upper" and "lower", or "top" and "bottom" have clear meanings. Such as an upper surface, a lower surface, a top wall, and a bottom wall. In addition, in a direction parallel to the first support surface, a direction from the center to the edge of the bottom wall is referred to as an "outward" direction, and a direction from the edge to the center of the bottom wall is referred to as an "inward" direction. Thus, the relative positional relationships of the "inner" and "outer" modifications are also used in a clear sense. For example, "medial" and "lateral". In addition, it is to be noted that the above terms indicating the orientations are merely exemplary and indicate the phase position relationships of the respective components, and the whole apparatus or device may be rotated by a certain angle as a whole for the combination of parts in the various apparatuses or devices of the present disclosure.

For example, as shown in fig. 1A-2B, the side plate 420 of the back plate 400 extends from an outer edge of the first support 413 toward the display panel 100. For example, the side plate 420 may have a ring structure that surrounds the display panel 100 once.

For example, fig. 2C is an enlarged view at the B position in fig. 2A. As shown in fig. 1A to 2C, four sides included in the display panel 100 are connected one by one to form four corners, and a groove 421 is provided at a position of the side plate 420 surrounding at least one of the four corners of the display panel 100, facing a side of the display panel 100.

For example, the bottom plate 410 and the side plates 420 in the back plate 400 may be integrally formed, and the back plate may be formed by an integral die casting or stamping forming process. This disclosed embodiment sets up the recess through the position at least one of four angles of curb plate, can prevent that the backplate from adopting stamping process to form the curved surface structure when, be located curb plate contained angle position and appear crowded material and pile up and lead to curb plate contained angle position to appear protruding to can guarantee that the backplate is located the curb plate and keeps away from the camber of first center and preceding frame of bottom wall side, and then guarantee display device's camber precision.

For example, fig. 3A is a first cross-sectional view of a structure of assembling the back plate and the backlight assembly, and fig. 3B is a second cross-sectional view of the structure of assembling the back plate and the backlight assembly. As shown in fig. 3A and 3B, the backlight assembly 300 includes a light source assembly 330, a reflective sheet 340, a second middle frame 320, and an optical film 310.

For example, as shown in fig. 1A-3B, the second middle frame 320 includes a second support portion 321, and the second support portion 321 is disposed on the first support surface 4130 of the first support portion 413. The second supporting portion 321 is configured to support the optical film 310, that is, the second supporting portion 321 has a second supporting surface 3215 facing the display panel 100, and the second supporting surface 3215 is used to support the optical film 310.

For example, as shown in fig. 3A and 3B, the second support 321 includes a first portion 3216 for supporting the optical film and a second portion 3217 contacting the first support 413 of the chassis. The side of the first portion 3216 of the second supporting portion 321 facing the optical film is provided with a second supporting surface 3215, the second portion 3217 of the second supporting portion 321 extends in a direction substantially perpendicular to the second supporting surface 3215 and contacts the first supporting portion 413, and the first supporting portion 413 supports the second middle frame 320 by supporting the second portion 3217 of the second supporting portion 321.

For example, the first supporting surface 4130 of the first supporting portion 413 of the bottom plate 410 is fixedly connected to the second supporting portion 321 of the second middle frame 320, that is, the second supporting portion 321 of the second middle frame 320 is fixed to the first supporting portion 413 of the bottom plate 410. For example, the first portion 3216 of the second support 321 is fixed to the first support 413 of the base plate 410.

For example, fig. 3C is an enlarged plan view of the second middle frame connected to the first support portion in the embodiment of the present disclosure, and fig. 3D is a schematic cross-sectional view taken along a line CC' shown in fig. 3C. As shown in fig. 1A to 3D, the second supporting portion 321 (e.g., the first portion 3216 of the second supporting portion 321) of the second middle frame 320 is fixedly connected to the first supporting portion 413 by the first fixing member 101, and the first fixing member 101 extends in a direction perpendicular to the first supporting surface 4130 to fixedly connect the first supporting portion 431 and the second middle frame 320 in the direction perpendicular to the first supporting surface 4130. The connection of the second middle frame 320 to the bottom plate 410 of the back plate 400 in the embodiment of the present disclosure may include the fixed connection of the second middle frame to the bottom plate along a direction perpendicular to the first supporting surface. The second middle frame and the back plate are fixed along the direction perpendicular to the first supporting surface, so that the second middle frame and the back plate are precisely positioned along the direction perpendicular to the first supporting surface, and the assembling tolerance can be minimized. In addition, the second center and the backplate are fixed along the direction of the first supporting surface of perpendicular to, both can prevent that first mounting from influencing the camber of second center, can make second center and backplate have better fixed connection effect again to make the second center can match the camber of backplate, and then the better camber of guaranteeing the second supporting part.

For example, the first fixing member 101 may be a nylon rivet, a screw, or the like, which is not limited in the embodiment of the present disclosure.

For example, as shown in fig. 1A to 3D, the second supporting portion 321 includes a first fixing hole 3210 penetrating the second supporting portion 321 in a direction perpendicular to the first supporting surface 4130, and the first supporting portion 413 of the base plate 410 includes a second fixing hole 4132 opposite to the first fixing hole 3210. The first fixing member 101 is located in the first fixing hole 3210 and the second fixing hole 4132, the first fixing member 101 fixedly connects the second middle frame 320 and the first supporting portion 413 of the bottom plate 410 through the first fixing hole 3210 of the second supporting portion 321 and the second fixing hole 4132 of the first supporting portion 413, and a fixing direction of the second middle frame 320 and the bottom plate 410 is a direction perpendicular to the first supporting surface. The second fixing hole can be a through hole, and at the moment, the first fixing piece can be a nylon rivet or a screw, for example, the nylon rivet is not easy to rust, cannot be influenced by the humidity of the external environment of the display device, and cannot generate abnormal sound when the display device is in a vibration environment; the second fixing hole may also be a blind hole, and in this case, the first fixing member may be a screw.

For example, as shown in fig. 1A to 3D, the first fixing holes 3210 include a first sub-fixing hole 3211 and a second sub-fixing hole 3212, and the first sub-fixing hole 3211 is located at a side of the second sub-fixing hole 3212 close to the display panel 100. In a direction parallel to the first supporting surface 4130, a minimum size of the first sub fixing hole 3211 is greater than a maximum size of the second sub fixing hole 3212 to form a step at a connection position of the first sub fixing hole 3211 and the second sub fixing hole 3212, the step having a fixing surface 3214 facing one side of the display panel and parallel to the first supporting surface, and a first fixing member 101 is disposed in the first fixing hole to fix the second middle frame with the bottom plate.

For example, the first fixing element 101 may include a first sub-fixing element 1011 and a second sub-fixing element 1012 connected to each other, and a third sub-fixing element 1013 located on a side of the second sub-fixing element 1012 away from the first sub-fixing element 1011. For example, the first sub-fixing element 1011 and the second sub-fixing element 1012 can be an integral structure, and the third sub-fixing element 1013 is movably connected with the second sub-fixing element 1012. For example, the first sub-fixing element 1011 is located in the first sub-fixing hole 3211, the second sub-fixing element 1012 is located in the second sub-fixing hole 3212 and the second fixing hole 4132 of the first supporting portion 413, and the third sub-fixing element 1013 is located on a side of the first supporting portion 413 away from the second supporting portion 321 to connect the third sub-fixing element 1013 with the second sub-fixing element 1012 in a clamping manner to fix the second middle frame and the bottom plate.

For example, the dimension of the first sub fixing element 1011 in the direction perpendicular to the first supporting surface is not greater than the depth of the first sub fixing hole 3211 to ensure the flatness of the partial surface of the second supporting portion for supporting the optical film.

For example, in a direction parallel to the first supporting surface 4130, the minimum dimension of the first sub-fixing element 1011 is greater than the maximum dimension of the second sub-fixing element 1012 and the maximum dimension of the second sub-fixing hole 3212, and the maximum dimension of the first sub-fixing element 1011 is less than the minimum dimension of the first sub-fixing hole 3211, when the second sub-fixing element 1012 is disposed in the second sub-fixing hole 3212, the first sub-fixing element 1011 can press-fit on the fixing surface 3214 (i.e., the first sub-fixing element contacts the fixing surface) to fix the second middle frame 320 on the bottom plate 410 in a direction perpendicular to the first supporting surface 4130.

For example, the first fixing hole and the through hole may be circular holes, and the size of the first fixing hole is larger than that of the first fixing member in a direction parallel to the diameter of the circular hole. For example, the diameter of the second sub fixing hole 3212 may be 3.78 mm, the diameter of the second sub fixing member 1012 may be 3.0 mm, and the diameter of the second fixing hole 4132 may be 3.1 mm. Of course, the disclosed embodiments are not so limited.

Fig. 3E is an enlarged plan view of a second middle frame connected to the first supporting portion according to another example of the embodiment of the disclosure. As shown in fig. 3E, the first fixing holes 3210 may be elliptical holes, and the long axis of the elliptical holes is along the extending direction of the first edge of the bottom wall, as long as the long axis of the first fixing holes 3210 is larger than the first fixing element 101.

For example, the first fixing holes 3210 in this example may also include a first sub-fixing hole (not shown) and a second sub-fixing hole (not shown), where the first sub-fixing hole is located on a side of the second sub-fixing hole close to the display panel. In a direction parallel to the first supporting face 4130, a minimum size of the first sub fixing hole is larger than a maximum size of the second sub fixing hole to form a step at a connection position of the first sub fixing hole and the second sub fixing hole, the step having a fixing face facing one side of the display panel and parallel to the first supporting face, and a first fixing member is disposed in the first fixing hole to fix the second middle frame with the bottom plate.

For example, the first fixing element 101 may also include a first sub-fixing element (not shown) and a second sub-fixing element (not shown) connected to each other, and a third sub-fixing element (not shown) located on a side of the second sub-fixing element away from the first sub-fixing element. For example, the first sub-mount and the second sub-mount may be of unitary construction. For example, the first sub-fixing member is located in the first sub-fixing hole, the second sub-fixing member is located in the second sub-fixing hole and the second fixing hole of the first supporting portion, and the third sub-fixing member is located on a side of the first supporting portion away from the second supporting portion to connect the third sub-fixing member and the second sub-fixing member in a clamping manner so as to fix the second middle frame and the bottom plate.

For example, the first sub fixing hole may be an elliptical hole, and the size of the first sub fixing member is smaller than that of the first sub fixing hole along the long axis direction of the elliptical hole; the size of the first sub fixing member is substantially equal to the size of the first sub fixing hole in the minor axis direction of the elliptical hole. The second sub-fixing holes can be circular holes or elliptical holes, and when the second sub-fixing holes are elliptical holes, the size of the second sub-fixing piece is smaller than that of the second sub-fixing holes along the long axis direction of the elliptical holes; the dimension of the second sub fixing member is substantially equal to the dimension of the second sub fixing hole in the minor axis direction of the elliptical hole.

Since the minimum size of the first sub fixing hole 3211 is greater than the maximum size of the first sub fixing element 1011 and the size of the second sub fixing hole 3212 is greater than the size of the second sub fixing element 1012 in a direction parallel to the first supporting surface, that is, the size of the first fixing hole is greater than the size of the first fixing element, a certain distance is formed between the inner side edge of the first fixing hole 3210 and the outer side edge of the first fixing element 101 in a direction parallel to the first supporting surface 4130, and the first fixing element 101 is not in contact with the inner side edge of the first fixing hole 3210. Thereby the second center when the in-process produces deformation such as expend with heat and contract with cold, above-mentioned interval provides the space of second center inflation and shrink to avoid the second supporting part bad such as local swell to appear. The second sub-fixing member 1012 penetrates through the second sub-fixing hole 3212 and the second fixing hole in the first supporting portion 413, and the fixed connection between the second middle frame and the bottom plate along the direction perpendicular to the first supporting surface can be realized by the way that the second sub-fixing member 1012 is engaged with the third sub-fixing member and the first sub-fixing member 1011 presses the fixing surface.

For example, fig. 3F is a schematic side view of the second middle frame shown in fig. 3A. As shown in fig. 1A to 3F, the portion of the support portion fixedly connected to the first arc-shaped strip portion 4131 of the second support portion 321 is arc-shaped. The partially arc-shaped supporting portion is fixedly connected with the first arc-shaped strip portion 4131 through a first fixing member 101 extending in a direction perpendicular to the first supporting surface 4130, and along the extending direction of the partially arc-shaped supporting portion, the size of the first fixing member 101 is smaller than that of the first sub-fixing hole so that the first fixing member 101 can move in the first fixing hole 3210 in a direction parallel to the first supporting surface 4130 relative to the second middle frame 320.

The second middle frame is adopted to support the optical diaphragm, and the second middle frame is fixedly connected with the bottom plate of the back plate instead of fixedly connecting the second middle frame with the side plate of the back plate. Therefore, when the partial arc-shaped supporting part of the second supporting part deforms due to expansion with heat and contraction with cold, the distance reserved between the first sub-fixing hole and the first fixing part can prevent the arc-shaped supporting part around the first fixing part from generating deformation seriously affecting the curvature of the second middle frame due to the convex hull and the like on one side facing the display panel, and the deformation also affects the optical diaphragm. In the embodiment of the present disclosure, the first fixing hole in the second middle frame is only a through hole penetrated by the first fixing member, and is not a screw hole for engaging with the first fixing member (taking the first fixing member as an example of a screw), so even if the expansion and contraction displacement generated by the arc-shaped supporting portion around the first fixing member is large, the deformation of the fixing hole may be large due to the obstruction of the first fixing member, and the fixing hole may not fail. Therefore, the bottom plate is fixedly connected with the second middle frame by the first fixing piece extending in the direction perpendicular to the first supporting surface, so that the first fixing piece can be prevented from influencing the curvature of the second supporting part, and the curvature of the second supporting part can be better ensured.

In the disclosed embodiment, the bottom wall may be used to maintain a predetermined curvature of the arcuate portion in the second support portion.

For example, when the second edge of the bottom wall is a straight edge, the strip portion corresponding to the second edge in the annular first supporting portion is also non-arc-shaped, and the second supporting portion disposed on the strip portion is also non-arc-shaped.

For example, the second middle frame does not have a large curvature before the second middle frame is coupled to the back plate, and when the second middle frame is coupled to the first support part by the first fixing member, the second support part of the second middle frame is bent in a shape corresponding to the curvature of the first support part.

For example, as shown in fig. 1A to 3F, the second middle frame 320 further includes an extending portion 322 connected to the second supporting portion 321, the extending portion 322 extends toward the direction close to the bottom wall 411, and an end portion of the extending portion 322 far from the second supporting portion 321 presses against the periphery of the reflective sheet 340. In the embodiment of the disclosure, while the second supporting portion and the first supporting portion included in the second middle frame are fixedly connected, the extending portion included in the second middle frame is pressed against the reflecting sheet arranged on the bottom wall to further fix the second middle frame, so that the second supporting portion is prevented from being turned over and the stability of the second middle frame is ensured.

It should be noted that, the extending portion is pressed against the reflective sheet, and the extending portion contacts the reflective sheet, so that the bottom wall supports the extending portion, and the extending portion fixes the reflective sheet to prevent the periphery of the reflective sheet from tilting. Fig. 1A to 3F schematically show that the end of the extending portion away from the second supporting portion is pressed against the reflective sheet, and the extending portion in the actual product is in contact with the surface of the reflective sheet.

For example, as shown in fig. 1A to 3F, an edge of the extension portion 322 connected to the second supporting portion 321 is located at an outer side of an edge of the extension portion 322 pressed against the reflection sheet 340, and an edge of the extension portion 322 connected to the second supporting portion 321 is located at a side of an end of the extension portion 322 pressed against the reflection sheet 340, which is close to the display panel 100, so that an inner side surface of the extension portion 322 is formed as an inclined surface, and the inclined surface functions as a reflection surface, for example, the reflectivity of the inclined surface is not less than the reflectivity of the reflection sheet, so as to improve the utilization rate of light emitted by the light source assembly 330 and improve the light efficiency. In the embodiment of the disclosure, the second middle frame is arranged to support the optical film, and the reflector plate is pressed to form a light mixing space between the light source assembly and the optical film.

For example, the material of the reflective sheet 340 has a flexible property by being disposed on the curved bottom wall 411 to form a curved reflective sheet having a certain curvature.

For example, the second middle frame 320 is made of a material having a certain hardness and also having flexibility. For example, the material of the second middle frame 320 may be Polycarbonate (PC) mixed with 10% glass fiber, thereby ensuring that the second middle frame has a predetermined hardness.

For example, fig. 4A is a schematic plan view of a portion of the second middle frame and the optical film shown in fig. 3A after being assembled, and fig. 4B is a schematic plan view of the optical film. As shown in fig. 1A-4B, a plurality of protrusions 3213 are disposed on a side of the second supporting portion 321 of the second middle frame 320 facing the display panel, an edge of at least one film (e.g., the first diffusion sheet and the second diffusion sheet) of the optical film 310 except for the diffusion plate includes a plurality of openings 3200, the plurality of openings 3200 and the plurality of protrusions 3213 are in one-to-one correspondence to cover at least one film of the optical film 310 except for the diffusion plate on the second middle frame 320, that is, the plurality of openings 3200 are covered on the plurality of protrusions 3213 one-to-one to cover at least one film of the optical film 310 except for the diffusion plate on the second middle frame 320.

In the technical solution provided by the embodiment of the present disclosure, the second middle frame is used for supporting and fixing the optical film (for example, the diffusion plate is adhered to the second supporting surface). Because the thermal expansion coefficient between the materials of the optical diaphragm and the second middle frame is close, when the optical diaphragm and the second middle frame deform due to expansion with heat, contraction with cold and the like, the attaching effect of the edge of the optical diaphragm and the second middle frame cannot be influenced, and therefore the curvature of the optical diaphragm is ensured. In addition, the second middle frame in the embodiment of the disclosure has a better supporting effect on the optical film, and the arrangement of the light supporting columns can be omitted, so that when the curved surface display device is applied to a vehicle, for example, an automobile, the vibration reliability can be improved.

For example, fig. 5A is a schematic plane structure diagram of a strip-shaped lamp panel in the light source assembly shown in fig. 1A and 1B, fig. 5B is a schematic plane structure diagram of an adapter plate connected to the strip-shaped lamp panel, and fig. 5C is a schematic assembly diagram of a back plate and the light source assembly. As shown in fig. 3C and fig. 5A to 5C, the backlight assembly includes a light source assembly 330 including a plurality of stripe lamp panels 3310, and light emitting diodes 331 arranged in an array on each stripe lamp panel 3310. The reflective sheet 340 is disposed on the light emitting surface of the light source assembly 330 and exposes the leds 331, that is, the reflective sheet is disposed on one side of the light source assembly facing the display panel and includes a plurality of openings for exposing the leds, so that the light emitted by the leds is not blocked by the reflective sheet.

For example, as shown in fig. 5A to 5C, the strip-shaped lamp panel 3310 includes a positioning hole 3312, a positioning protrusion corresponding to the positioning hole 3312 is disposed on a side of the bottom wall of the back plate facing the light source assembly 330, and the positioning hole 3312 is engaged with the positioning protrusion (e.g., the positioning hole is sleeved on the positioning protrusion) to position the strip-shaped lamp panel. The strip-shaped lamp panel 3310 may be provided with a double-sided adhesive tape on one side facing the bottom wall, and the strip-shaped lamp panel 3310 is positioned by the positioning holes 3312 and is fixedly connected to the bottom wall by the double-sided adhesive tape.

For example, as shown in fig. 5A to 5C, the striped lamp panel 3310 further includes a third fixing hole 3313, and the reflector 340 located on a side of the striped lamp panel 3310 away from the bottom wall may be fixedly connected to the bottom wall through the third fixing hole 3313, so as to further fix the striped lamp panel 3310.

For example, as shown in fig. 3E and 5A, the reflective sheet 340 includes fourth fixing holes 341 corresponding to the third fixing holes 3313, and both the reflective sheet 340 and the strip lamp panel 3310 may be fixed to the back panel by using nylon rivets to penetrate through the fourth fixing holes and the third fixing holes.

For example, as shown in fig. 5C, the extending direction of each stripe lamp panel 3310 is parallel to the second edge 4112, that is, the extending direction of the stripe lamp panel 3310 intersects with the extending direction of the arc-shaped first edge 4111, so as to prevent the curved bottom wall of the back panel from being deformed or damaged due to the stress influence on the stripe lamp panel caused by the difference between the stress of the curved bottom wall of the back panel and the stress of the stripe lamp panel. For example, the plurality of striped lamp panels 3310 may be arranged along the extending direction of the first edge 4111, but is not limited thereto, and the plurality of striped lamp panels may also be arranged in an array.

For example, as shown in fig. 5A-5C, each strip light panel 3310 further includes a patch panel connector 3311. The backlight assembly further includes at least one strip-shaped interposer 350 on a side of the bottom wall facing the display panel. Each adapter board 350 includes a plurality of strip connectors 351 to connect to the adapter board connectors 3311 of the strip lamp panels 3310. That is, each adapter plate 350 is connected to a plurality of strip lamp panels 3310.

For example, each of the adapter plates 350 extends along the extending direction of the first edge 4111, and a plurality of adapter plates 350 are arranged along the extending direction of the first edge 4111, and along the extending direction of the second edge 4112 of the bottom wall, the adapter plates 350 are located at one side of the light source assembly 330.

For example, the material of the interposer has flexible characteristics, and is disposed on the curved bottom wall 411 to form an arc-shaped interposer with a certain curvature.

For example, the edge of the reflective sheet 340 extending along the extending direction of the first edge of the bottom wall may be provided with a slot, the edge of the slot corresponds to the adapter plate, and the slot is used for avoiding the position where the adapter plate connector 3311 is connected to the light bar connector 351.

For example, as shown in fig. 5A-5C, the adapter plate 350 is further provided with an adapter plate fixing hole 353 to achieve a fixed connection with the bottom wall.

For example, fig. 5D is a plan view of the side of the back plate away from the display panel. For example, as shown in fig. 5A-5D, the adapter board 350 further includes a driving connector 352 to connect the strip lamp board 3310 to a light source driving board 700 located on a side of the backplane away from the display panel. For example, the driving connector 352 may be connected to the light source driving board 700 through a Flexible Flat Cable (FFC) 701.

For example, at least two strip lamp panels 3310 connected to each adapter board 350 may be connected to the adapter board 350 to reduce the number of strip lamp panel output lines, so as to reduce the number of strip lamp panel output ports, that is, to reduce the number of driving connectors 352.

For example, one patch panel 350 may provide eight strip connectors 351 to connect with the patch panel connectors 3311 of eight strip panels 3310 to reduce the number of strip panel output interfaces to three. That is, the adapter board 350 connected to the eight strip lamp panels 3310 may be provided with three driving connectors 352 as output ports of the eight strip lamp panels 3310, thereby reducing the output ports of the strip lamp panels. The embodiment of the present disclosure schematically shows a case of reducing the number of output end interfaces of eight light bars to 3, but is not limited thereto, and may also be 1, 2, 4, and the like, as long as the number of light bar output end ports is less than the number of light bars. Fig. 5C schematically shows a situation that two adapter plates connect sixteen strip-shaped lamp panels, and the number of the strip-shaped lamp panels connected by the adapter plates in the embodiment of the present disclosure is not limited, and may be set according to actual product requirements.

For example, fig. 5E is a partial side view of the connection portion of the back plate shown in fig. 1A. As shown in fig. 5D to 5E, a strip-shaped wire hole 4120 is provided at a portion where the connecting portion 412 contacts one of the two first sides 4111 of the bottom wall 411, and a long axis of the strip-shaped wire hole 4120 is parallel to the first side 4111. For example, the flexible cable 701 passes through the strip-shaped outlet hole 4120 to connect the light source assembly 330 and the light source driving board 700. According to the embodiment of the disclosure, the strip-shaped wire outlet with the long shaft parallel to the first side is arranged on the connecting part, so that the influence of the wire outlet on the strength of the connecting part can be reduced.

For example, the driving connector 352 of the adapter board 350 may be connected to a flexible flat cable 701, and the flexible flat cable 701 passes through a strip-shaped wire outlet 4120 provided on the connecting portion 412 and extends to a side of the bottom wall 411 away from the display panel to be connected to the light source driving board 700 located on the back of the display device. In the embodiment of the disclosure, the connecting portion is provided with the strip-shaped wire outlet, so that the lamp wire connecting the light source assembly and the light source driving board passes through the connecting portion instead of the bottom wall, and the influence of the wire outlet on the strength and curvature of the bottom wall can be reduced.

For example, the light source driving board 700 may be driven by a voltage signal connected with an external power source to perform, for example, divisional and/or time-sharing, on the respective light emitting diodes.

For example, the light source driving board 700 may be connected through a power line, a clock line, an input/output line (I/O line), or the like signal line to control the operation timing of the light source driving board 700. For example, the light emitting diodes may be controlled in a divided manner to achieve a high contrast ratio and a high brightness of the display device.

When the luminance requirement to backlight unit's light source is higher, emitting diode's quantity need set up more, if every strip lamp plate all is connected to the light source drive plate that display panel one side was kept away from to the backplate through a signal line, then need set up a plurality of connection via holes at the diapire of backplate, can lead to the intensity of diapire to receive the influence. This disclosed embodiment can reduce the quantity of strip lamp plate output port through setting up the keysets that corresponds with a plurality of strip lamp plates to reduce the quantity of trompil on the backplate and in order to guarantee the intensity of backplate.

Based on the above embodiment, the present disclosure further provides such a technical solution: a display device, comprising: a display panel; the backlight assembly is positioned on the non-display side of the display panel and comprises a plurality of strip-shaped lamp panels, and each strip-shaped lamp panel extends along a first direction; the back plate is at least partially positioned on one side of the backlight assembly far away from the display panel, and comprises a bottom wall and a side wall connected with the edge of the bottom wall; the plurality of strip-shaped lamp panels are located on one side, facing the display panel, of the bottom wall, the backlight assembly further comprises at least one adapter plate located on one side, facing the display panel, of the bottom wall, the adapter plate extends along a second direction intersecting with the first direction, and each adapter plate is connected with at least two strip-shaped lamp panels to provide driving signals for the strip-shaped lamp panels.

In some examples, each of the light bar panels includes a plurality of light bar connectors to connect with the light bar connectors of the light bar panels.

In some examples, the bottom wall includes a first bottom edge extending along the first direction and a second bottom edge extending along the second direction, and a portion of the sidewall that meets the second bottom edge near the interposer is provided with an outlet hole; the display device further comprises a light source driving board which is positioned on one side of the bottom wall far away from the display panel, and the adapter board is connected with the light source driving board through a lead led out from the wire outlet hole.

In some examples, the bottom wall is a curved structure and the second bottom edge is a curved edge.

In some examples, the wire outlet hole is a bar-shaped wire outlet hole, and a long axis of the bar-shaped wire outlet hole is parallel to the second bottom edge.

In some examples, the backlight assembly further includes an optical film and a middle frame located at a side of the optical film away from the display panel and configured to support the optical film.

It should be noted that the sidewall provided with the wire outlet in the present technical solution is the connecting portion 412 in the embodiment shown in fig. 5E; in this embodiment, the first bottom edge of the bottom wall is the second edge 4112 in the embodiment shown in fig. 2A, and the second bottom edge is the first edge 4111 in the embodiment shown in fig. 2A; the middle frame in this embodiment is the second middle frame 320 in the embodiment shown in fig. 1A. Other features not described in detail may be referred to the above embodiments.

For example, fig. 6A is a partial cross-sectional view illustrating an assembly of the first middle frame, the backlight assembly and the back plate. As shown in fig. 6A, a side of the first middle frame 200 away from the display panel 100 in the embodiment of the disclosure is pressed against the optical film 310, that is, a surface of the first middle frame 200 away from the display panel 100 contacts the optical film 310 to press and fix the optical film 310, so as to ensure the flatness of the optical film 310.

For example, fig. 6B is a schematic plan structure view of the first middle frame shown in fig. 1A and 1B, fig. 6C is a schematic partial enlarged view at a position D in fig. 6B, and fig. 6D is a schematic side view of the first middle frame in fig. 6C. As shown in fig. 1B and fig. 6A to 6D, the first middle frame 200 may be a continuous ring structure surrounding the display panel 100 once.

For example, as shown in fig. 6A-6B, the first middle frame 200 includes an outer frame 210 surrounding the display panel 100, and at least a portion of the outer frame 210 is located outside the side plate 420 of the back plate 400 and is fixedly connected to the side plate 420. For example, a part of the outer frame of the first middle frame can be connected with the side plate in a clamping mode to realize the positioning of the first middle frame, and another part of the outer frame of the first middle frame can be fixedly connected with the side plate to realize the position fixing. For example, fig. 6D shows the card and hole 2020 on the outer frame of the first middle frame, and the side plate of the back plate is further provided with a card and a protrusion corresponding to the card and hole 2020 to engage with the card and hole to realize coarse positioning of the first middle frame. That is, the clips and holes of the outer frame fit over the clips and protrusions on the side panels to achieve coarse positioning of the first middle frame.

For example, the first middle frame may be supported by the side plate of the back panel in a direction perpendicular to the bottom wall. The outer frame of the first middle frame includes a connection hole 2021, and the side plate of the back plate includes screw holes opposite to the connection hole 2021 of the outer frame. A screw may be inserted through the connection hole and the screw hole, and the screw is engaged with the screw hole of the side plate through the connection hole 2021 of the outer frame, so as to fixedly connect the first middle frame and the side plate of the back plate, and the fixing direction is a direction perpendicular to the side plate. In the embodiment of the present disclosure, the connection hole (the connection hole 2021 shown in fig. 6D) in the first middle frame is only a through hole through which the screw passes, and is not a threaded hole for engaging and connecting with the screw, so even if the expansion and contraction displacement generated in the first middle frame around the screw is large, the deformation of the connection hole may be large due to the obstruction of the screw, and the connection hole does not fail.

For example, the material of the first middle frame 200 may be a light blocking material to play a role of blocking light to the edge area of the display panel 100. For example, the material of the first middle frame 200 may be a flexible material to bend as other structures bend. For example, the material of the first middle frame 200 may be Polycarbonate (PC).

For example, the material of the second middle frame 320 in the embodiment of the present disclosure has a hardness greater than that of the material of the first middle frame 200.

In the embodiment of the disclosure, the hardness of the first middle frame and the second middle frame is different because the positions of the two middle frames and the supported film layers are different. The hardness of the material selected for the first middle frame is lower, so that the curvature of the first middle frame is determined by the curvature of the front frame positioned on the side far away from the display panel. Even when deformation such as expansion with heat and contraction with cold takes place, the front bezel is through the pressfitting with first center, also can minimize the change of the camber of first center. In addition, the thickness of the first middle frame provided by the embodiment of the disclosure is relatively thin, for example, 0.8 mm, and the curved surface forming rate of the first middle frame can be improved. The second center is located the bottom plate of backplate, through the effect that adopts the great material of hardness in order to play support optical diaphragm, and the setting that can be stable on the bottom plate, prevents to produce unnecessary deformation because of the material of second center is softer to guarantee optical diaphragm's camber precision.

The first middle frame and the second middle frame which are arranged in the display device and separated from each other can ensure the curvature precision of each middle frame after the curved surface is formed; and, the first middle frame and the second middle frame can be formed by adopting different materials and different thicknesses to ensure good fit with the curvatures of other structures, so that the assembly tolerance can be reduced, and the curvature precision of the display device is improved.

For example, as shown in fig. 6A to 6D, the first middle frame 200 includes a third supporting portion 230 configured to support the display panel 100, the third supporting portion 230 includes a second arc-shaped bar portion 220 corresponding to the first arc-shaped bar portion 4131, and the second arc-shaped bar portion 220 and the first arc-shaped bar portion 4131 are bent in the same direction. The display panel can be ensured to have a predetermined curvature by arranging the first middle frame for supporting the display panel into a curved surface structure.

For example, the third supporting portion 230 includes two second arc-shaped strip portions 220 opposite to each other, and the two second arc-shaped strip portions 220 correspond to two first edges of the bottom wall. When the second edge of the bottom wall is also arc-shaped, the third supporting part can also comprise another two arc-shaped strip parts which are opposite to each other; when the second edge of the bottom wall is a straight edge, the other two strip-shaped portions opposite to each other included in the third supporting portion are linear strip-shaped portions, which is not limited in the embodiment of the disclosure.

For example, as shown in fig. 6A to 6D, the third supporting portion 230 has a third supporting surface facing the display panel 100, the third supporting surface is provided with a buffer 102, and the buffer 102 can release the acting force between the display panel and the first middle frame when the display device is in a vibration state, so as to prevent the display panel 100 from being damaged by an external force. For example, the buffer member may be a flexible material such as foam or rubber.

For example, as shown in fig. 6A to 6D, the inner side edge of the outer frame 210 wrapping the side edge of the display panel 100 may also be provided with a buffer member 102. Therefore, when the side edge of the display panel is placed towards the ground, the inner side edge of the first middle frame supports the display panel, and the buffer piece arranged on the inner side edge of the first middle frame can protect the display panel.

For example, as shown in fig. 6A to 6D, one edge of the outer frame 210 of the first middle frame 200 may be provided with side wall retaining walls 202 and side wall openings 201 between the adjacent side wall retaining walls 202, and the other edge of the outer frame 210 of the first middle frame 200 may be a continuous structure including connection holes for fixing with a back plate. For example, the frame 210 where the sidewall 202 is located may be an arc-shaped frame corresponding to the first arc-shaped bar, and the sidewall 202 is used to support the display panel when the side of the display panel facing the sidewall 202 is placed facing the ground. Therefore, the buffer piece arranged on the inner side of the outer frame can be the buffer piece arranged on the inner side plate of the side wall retaining wall.

For example, the display device further includes a circuit board (not shown) located on a side surface of the first supporting portion away from the display panel and located outside the connecting portion, and the circuit board is connected to the display panel through a wire led out from a side wall opening provided at the outer frame of the first middle frame.

For example, fig. 7A is a schematic plan view of the front frame shown in fig. 1A and 1B, fig. 7B is a schematic structural view of a front frame sidewall of the front frame shown in fig. 7A, fig. 7C is an enlarged schematic view of a position E in the front frame sidewall, and fig. 7D is a schematic partial structural view of the front frame connected to the back plate. As shown in fig. 1A to 7D, the front frame 600 is located on a side of the first middle frame 200 away from the backlight assembly 300 and configured to press the display panel 100 to fix the display panel 100 on the first middle frame 200. That is, the front frame contacts the display panel to fix the display panel on the first middle frame.

For example, the front frame 600 may be a continuous ring structure surrounding the display panel 100.

For example, the front frame 600 may be made of an electrogalvanized steel plate with a thickness of 0.6 to 0.8 mm, and the curvature of the front frame may be ensured by stamping. For example, the back plate and the front frame can be manufactured by a die-casting type forming process, the resilience and dehydration rate of the formed material are smaller than those of a punch forming process, and the statistical tolerance curvature can be +/-1 mm.

For example, the front frame 600 may include a third arc-shaped bar portion 610 on a side of the second arc-shaped bar portion 220 away from the first arc-shaped bar portion. The third arc-shaped strip portion is a strip portion corresponding to the first edge of the bottom wall, and the curvature of the display panel and the curvature of the first middle frame are determined by setting the curvature of the third arc-shaped strip portion of the front frame.

For example, the curvature of the second arc-shaped strip portion of the first middle frame is determined by the curvature of the third arc-shaped strip portion of the front frame. The material of the first middle frame in the embodiment of the present disclosure is made of a flexible material to bend along with the bending of the front frame, that is, the curvature of the first middle frame is determined by the curvature of the front frame located on the side away from the display panel, and can better cooperate with the front frame to ensure the curvature of the display panel located thereon.

For example, when the display panel is disposed between the first middle frame and the front frame, the curvature of the display panel is determined by the curvatures of the front frame and the first middle frame together.

For example, as shown in fig. 7A to 7D, the front frame 600 includes a front frame sidewall 620 located at a side of the outer frame 210 of the first middle frame 200 away from the side plate 420, and the front frame sidewall 620 may be fixed to the side plate of the back plate by screws.

For example, the front frame sidewall 620 includes an elongated hole 6200, such that the front frame sidewall 620 is fixedly connected to the side panel 420 by the second fastener 630 penetrating the elongated hole 6200. The minor axis of the elongated hole 6200 is perpendicular to the first support surface to reduce the curvature tolerance after the front frame and the back plate are locked, i.e. reduce the curvature influence value, and simultaneously ensure the assembly deviation by utilizing the major axis, thereby improving the assembly rate.

For example, the screw holes of the back plate may be circular holes having a diameter of 2.5 mm. The screw hole of the side wall of the front frame is an elliptical hole, the size of the long axis of the elliptical hole is 4.4mm, the size of the short axis of the elliptical hole is 3.2mm, and the curvature tolerance of the front frame is +/-0.7 mm.

For example, along the extension direction of the short shaft, the size of the second fixing piece is matched with that of the short shaft so as to realize the fine positioning of the front frame. That is, the dimension of the second fixing member is substantially equal to the dimension of the short axis in the direction of the short axis.

For example, along the long axis direction, the difference between the second fixing member and the long axis may be between 0.81 and 0.96 mm; the difference between the dimension of the second fixing member and the minor axis along the minor axis direction may be between 0.31 and 0.46 mm.

The fine positioning in the embodiment of the present disclosure means that the difference in size between the fixing member and the fixing hole is an assembly tolerance, which is a tolerance that is reasonably present in order to facilitate the installation of the fixing member into the fixing hole. For example, in an actual product, the size of the fixing member and the size of the fixing hole may not be exactly the same, and in order to facilitate the installation of the fixing member into the fixing hole, the size of the fixing hole exceeds the fixing member, for example, exceeds 0.1-0.4 mm.

The rough positioning means that the size difference between the fixing piece and the fixing hole is larger than the assembly tolerance, so that the fixing piece and the fixing hole can generate certain relative displacement in at least one direction after being fixed, in order to realize the rough positioning, namely the fixing hole and the fixing piece can be allowed to generate relative displacement in at least one direction, the size difference between the fixing piece and the fixing hole can be set to be larger than the assembly tolerance, for example, the assembly tolerance is 0.1-0.5 mm, and under the condition of the rough positioning, the size difference between the fixing piece and the fixing hole can be set to be 0.81-0.96 mm.

For example, fig. 8 is a schematic view of a curvature tolerance relationship of a display device provided according to an embodiment of the present disclosure. The curvature of the different structures of the display device in the embodiment of the present disclosure is different, and in order to ensure the assembling property, the curvature radius of each assembling surface is kept the same, and the formula of the curvature radius of the different structures is Rx ═ R0 ± h, Rx refers to the curvature radius of the X-th layer structure, R0 refers to the curvature radius of the reference layer, and h refers to the height difference between the reference layer and the X layer. The curvature radius R0 of the curved display device is defined as the curvature radius of an imaginary plane between the array substrate and the opposite substrate in the display panel according to the embodiment of the present disclosure. Of course, the radius of curvature of the upper surface of the display panel away from the backplane may also be defined as R0.

As shown in fig. 8, the curvature of the display device provided by the embodiment of the disclosure can be 4200R ± 4.5% R, and 4200R refers to the curvature radius of the display panel. When the backboard of the curved surface display device is formed in a stamping mode, the chord height tolerance of the display device can be +/-2 mm, and when the backboard is formed in a die-casting mode, the chord height of the display device can be +/-1 mm. As shown in fig. 8, the tolerance of the front frame manufactured by the stamping method is d1 ± 0.2mm, the tolerance of the first middle frame manufactured by the injection molding method is d2 ± 0.05mm, the gap between the first middle frame and the back plate is 0.2mm, the tolerance of the back plate manufactured by the stamping method is d3 ± 0.3mm, the curvature tolerance of the back plate is ± 0.7mm, the deviation tolerance of the center of the fixing hole position of the back plate and the front frame from the surface of the back plate bottom wall far away from the display panel is d4 ± 0.3mm, the screw diameter manufacturing tolerance is d7 ± 0.05mm, the gap of the screw from the edge of the front frame positioning hole is 0.6mm, the deviation of the center position of the front frame positioning hole is d6 ± 0.05mm, and the deviation tolerance of the center of the front frame positioning hole from the surface of the front frame is d5 ± 0.2mm, so that the curvature tolerance after the above-mentioned tolerances are integrated into 2.65 mm. And statistically normalizing the curvature tolerance of the plurality of curved surface display devices in the production process to obtain a statistical tolerance of 1.67 mm. Therefore, the curvature accuracy of the display device provided by the embodiment of the disclosure can be 4.5% R.

For example, the curved surface display device provided by the embodiment of the disclosure can be an on-vehicle curved surface display device applied to an automobile.

Another embodiment of the present disclosure provides a vehicle including any one of the curved surface display devices described above.

For example, the vehicle may include a vehicle for carrying people or transporting goods, such as an automobile, an airplane, a ship, a subway, and the like.

For example, the motor vehicle may be an automobile, a truck, or the like.

The following points need to be explained:

(1) in the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to general designs.

(2) Features of the same embodiment of the disclosure and of different embodiments may be combined with each other without conflict.

The above description is intended to be exemplary of the present disclosure, and not to limit the scope of the present disclosure, which is defined by the claims appended hereto.

Claims

A curved surface display device comprising:

a display panel;

a first middle frame located at a non-display side of the display panel and configured to carry the display panel;

the backlight assembly is positioned on one side, away from the display panel, of the first middle frame and comprises an optical film and a second middle frame, and the second middle frame is positioned on one side, away from the display panel, of the optical film and is configured to support the optical film; and

a back plate, at least a portion of the back plate being located on a side of the backlight assembly away from the display panel,

the back plate comprises a bottom plate and side plates arranged at the edges of the bottom plate, and the second middle frame is connected to the bottom plate.
The curved display device according to claim 1, wherein the bottom plate includes a bottom wall and a first support portion located outside an edge of the bottom wall, the first support portion being located on a side of the bottom wall facing the display panel, the first support portion having a first support surface facing the display panel, the second bezel includes a second support portion having a second support surface facing the display panel to support the optical film, the second support portion being provided on the first support surface of the first support portion.
The curved display device according to claim 2, wherein the second support portion of the second middle frame and the first support portion are fixed to each other in a direction perpendicular to the first support surface by a first fixing member.
The curved display device according to claim 3, wherein the second support portion comprises a fixing hole penetrating through the second support portion in a direction perpendicular to the first support surface, the first fixing member is located in the fixing hole, and the size of the fixing hole is larger than that of the first fixing member in a direction parallel to the first support surface so that a gap is formed between the first fixing member and an inner side wall of the fixing hole.
The curved display device of any one of claims 1 to 4, wherein the material of said second middle frame has a hardness greater than the hardness of the material of said first middle frame.
The curved display device according to any one of claims 1 to 5, wherein a side of the first bezel facing away from the display panel is pressed against the optical film.
The curved display device of claim 4, wherein said bottom wall comprises two first sides opposite to each other, said first sides being arcuate sides; the first supporting portion comprises a first arc-shaped strip portion corresponding to the first edge, and the bending direction of the first arc-shaped strip portion is the same as that of the first edge.
The curved display device according to claim 4, wherein the fixing holes are circular holes, and the size of the fixing holes is larger than that of the first fixing member in a direction parallel to the diameter of the circular holes.
The curved display device according to claim 7, wherein said fixing holes are elliptical holes, the long axis direction of said elliptical holes is parallel to said first edge, and the size of said fixing holes is larger than the size of said first fixing member in the direction parallel to said first edge.
The curved display device of any one of claims 2 to 4, wherein the base plate further comprises a connecting portion connecting an edge of the bottom wall and the first support portion, the first support portion extending outwardly from an edge of the connecting portion.
The curved display device according to claim 10, wherein the backlight assembly further comprises a light source assembly and a reflector plate, the light source assembly comprises light emitting diodes arranged in an array, the reflector plate is located on a light emitting surface of the light source assembly and exposes the light emitting diodes, and the light source assembly is disposed on one side of the bottom wall close to the display panel.
The curved display device according to claim 11, wherein the second middle frame further comprises an extension part connected to the second support part and partially located inside the connecting part of the back plate, the extension part extending in a direction close to the bottom wall;

the end part of the extending part far away from the second supporting part is pressed against the periphery of the reflecting sheet.
The curved display device according to claim 12, wherein an edge of the extending portion connected to the second support portion is located outside an edge of the extending portion pressed against the reflective sheet, and an edge of the extending portion connected to the second support portion is located on a side of an end of the extending portion pressed against the reflective sheet close to the display panel, so that an inner side surface of the extending portion is formed as an inclined surface, and a reflectivity of the inclined surface is not less than a reflectivity of the reflective sheet.
The curved surface display device according to any one of claims 11 to 13, wherein the bottom wall includes two second sides opposite to each other, the second sides are straight sides, the light emitting diodes are disposed on the plurality of striped lamp panels, and an extending direction of each striped lamp panel is parallel to the second sides.
The curved display device of claim 14, wherein the backlight assembly further comprises at least one adapter plate located on a side of the bottom wall facing the display panel, each adapter plate connecting at least two of the stripe lamp panels to provide driving signals thereto.
The curved display device of claim 15, wherein said bottom wall further comprises two first sides opposite each other, said first sides being arcuate sides;

the connecting part is provided with a strip-shaped wire outlet hole, the part of the bottom wall, which is provided with the strip-shaped wire outlet hole, is connected with the first edge, which is close to the adapter plate, of the bottom wall, and the long axis of the strip-shaped wire outlet hole is parallel to the first edge.
The curved display device of claim 16, further comprising a light source driver board located on a side of said bottom wall remote from said display panel, said adapter board being connected to said light source driver board by wires led out from said strip-shaped outlet holes.
The curved display device according to claim 7 or 16, wherein an arc-shaped rib is disposed on a side of the bottom wall away from the display panel, the extending direction of the arc-shaped rib is the same as the extending direction of the first edge, and the strength of the arc-shaped rib is greater than that of the bottom wall to prevent the bottom wall from being deformed.
The curved display device according to claim 5, wherein the side plate extends from an outer edge of the first support portion toward the display panel, the first middle frame comprises an outer frame surrounding the display panel, and a portion of the outer frame is located outside the side plate and is fixedly connected to the side plate.
The curved display device according to claim 19, wherein the first middle frame comprises a third support portion configured to support the display panel, the third support portion has a third support surface facing the display panel, and a buffer is disposed on the third support surface and an inner side of the outer frame surrounding the display panel.
The curved display device of claim 19 or 20, further comprising: the front frame is positioned on one side, away from the backlight assembly, of the first middle frame and is configured to press the display panel and the surface, away from the bottom plate side, of the outer frame of the first middle frame so as to guarantee the curvature of the display panel and the first middle frame.
The curved display device according to claim 21, wherein the front frame comprises a front frame side wall located at the outer frame and far away from the side plate, the front frame side wall comprises a strip-shaped hole, so that the front frame side wall is fixedly connected to the side plate through a second fixing member penetrating through the strip-shaped hole, a short axis of the strip-shaped hole is substantially perpendicular to the first supporting surface, and a dimension of the second fixing member is substantially equal to a dimension of the short axis along an extending direction of the short axis.
The curved display device according to claim 20, wherein the display panel comprises four sides connected one to form four corners, and the side plate is provided with a groove around a side of at least one of the four corners of the display panel facing the third support surface.
The curved display device of any one of claims 1 to 23, wherein the material of the first bezel is a light blocking material.
The curved display device of any one of claims 1-24, wherein the curved display device is an in-vehicle curved display device.
A vehicle comprising the curved display device of any one of claims 1-25.