CN215577408U - Display device - Google Patents

Abstract

A display device is provided. The display device includes: a display panel having a display part, a connection part, and a bending part, a main support layer; and an auxiliary support layer including a main body portion and a folded-back portion connected to the main body portion as a unitary structure. The edge portion of the display device includes a stacked structure. The stack structure includes: the connecting portion; the folded-back portion on the connecting portion; at least a part of the main body portion on a side of the folded-back portion away from the connecting portion; a portion of the primary support layer; and a portion of the display section located on a side of the portion of the main support layer remote from the main body section. The layers of the stacked structure are curved towards the back side of the display device.

Description

Display device

Technical Field

The present invention relates to a display technology, and more particularly, to a display device.

Background

The flexible display device is a bendable or deformable display device having a flexible display panel. Examples of the flexible display device include a flexible Organic Light Emitting Diode (OLED) display device, a flexible electrophoretic display (EPD) device, and a flexible Liquid Crystal Display (LCD) device. As a new generation display device, a flexible display device is thinner and lighter, and has high contrast, high responsiveness, and high brightness. It also provides a full color display and a wide viewing angle. Flexible display devices have wide application in mobile phones, Personal Digital Assistants (PDAs), digital cameras, on-board displays, notebook computers, wall-mounted televisions, and various military applications. The flexible display device includes a flexible array substrate. The base substrate of the flexible array substrate may be made of a flexible material such as plastic.

SUMMERY OF THE UTILITY MODEL

In one aspect, the present disclosure provides a display apparatus, comprising: a display panel having a display portion, a connection portion, and a bent portion, wherein the bent portion connects the display portion and the connection portion, and the bent portion is bent; a main support layer; and an auxiliary support layer including a main body portion and a folded-back portion as a unitary structure, the folded-back portion being connected to the main body portion; wherein an edge portion of the display device includes a stacked structure including: the connecting portion; the folded-back portion on the connecting portion; at least a part of the main body portion on a side of the folded-back portion away from the connecting portion; a portion of the primary support layer; and a portion of the display section on a side of the portion of the main support layer remote from the main body section; wherein the plurality of layers of the stacked structure are curved toward a back surface of the display device, the back surface of the display device being opposite to a light emitting surface of the display device.

Optionally, the folded back portion and the main body portion comprise the same material; a part of the main body portion and the folded-back portion form a double-layer structure; and the folded-back portion is at least partially in contact with a rear surface of the main body portion, the rear surface being a surface of a side of the main body portion remote from the main support layer.

Optionally, the bending portion is bent to form a bending cavity; and a portion of the auxiliary support layer where the folded back portion and the main body portion are connected to each other directly adjoins the bending cavity.

Optionally, at least part of the body portion and the folded back portion have matching curvatures.

Optionally, at least portions of the folded back portion, the main body portion and the main support layer have matching curvatures.

Optionally, each layer and an adjacent layer of the plurality of layers of the stacked structure have matching curvatures.

Optionally, the display device further comprises a flexible printed circuit bonded to the connection portion; wherein the flexible printed circuit includes a chip portion on a rear surface of the display device, a bonding portion including a plurality of bonding pads bonded to the connection portion, and an extension portion connecting the chip portion and the bonding portion; and a first average distance between a surface of the engaging part on a side close to the main support layer and a surface of the main support layer on a side close to the engaging part is substantially the same as a second average distance between a surface of the extending part on a side close to the main support layer and a surface of the main support layer on a side close to the extending part.

Optionally, the surface of the engagement portion on the side adjacent the main support layer and the surface of the extension portion on the side adjacent the main support layer are substantially coplanar.

Optionally, an orthographic projection of the edge of the folded-back portion close to the chip portion on the main support layer is spaced from an orthographic projection of the edge of the connecting portion close to the chip portion on the main support layer by a distance of 0.2mm or more; an orthographic projection of an edge of the connecting portion near the chip portion on the main support layer is spaced apart from an orthographic projection of an edge of the chip portion near the folded-back portion on the main support layer by a distance of less than 1.0 mm; and an orthographic projection of the edge of the folded-back portion near the chip portion on the main support layer between an orthographic projection of the edge of the connecting portion near the chip portion on the main support layer and an orthographic projection of the edge of the chip portion near the folded-back portion on the main support layer.

Optionally, the stacked structure further comprises: a first back film covering a back surface of the display part, the first back film being located between the display part and the part of the main support layer; and a second back film covering a back surface of the connecting portion, the second back film being located between the connecting portion and the folded-back portion; wherein the fold portion does not include the first backing film and does not include the second backing film.

Optionally, an orthographic projection of the folded-back portion on the second back film does not overlap with a portion of the second back film, the portion of the second back film being a portion extending toward the bent portion beyond a place where the folded-back portion and the main body portion are connected to each other on the auxiliary support layer; and an edge of the portion of the second back film is spaced apart from a portion of the auxiliary support layer where the folded-back portion and the main body portion are connected to each other by a distance of 0.15mm or more.

Optionally, the stacked structure further comprises: a first optically clear adhesive layer between the first backing film and the portion of the main support layer, the first optically clear adhesive layer bonding the first backing film and the main support layer together; a polarizer located on a side of the display portion away from the first back film; a second optically transparent adhesive layer on a side of the polarizer remote from the display portion; and a cover positioned on one side of the second optically transparent adhesive layer far away from the polarizer.

Optionally, the display device further comprises a coating covering a back surface of the bending portion, the back surface being opposite to a side of the bending portion directly surrounding the bending cavity.

Optionally, the primary support layer comprises a metallic material; and the auxiliary support layer comprises an organic polymeric material.

Optionally, the primary support layer comprises a metallic material; and the auxiliary support layer comprises a metallic material.

In another aspect, the present disclosure provides a method of manufacturing a display device, including: setting a display panel; bending the display panel to form a bent portion, a display portion, and a connection portion, the bent portion connecting the display portion and the connection portion; arranging a main supporting layer; providing an auxiliary support layer comprising a main body portion and a folded-back portion as a unitary structure, the folded-back portion being connected to the main body portion; disposing the main support layer and the auxiliary support layer between the connection part and the display part, thereby forming a stacked structure at an edge part of the display device, wherein the stacked structure includes the connection part; the folded-back portion on the connecting portion; at least a part of the main body portion on a side of the folded-back portion away from the connecting portion; the main support layer located on a side of the main body portion remote from the folded-back portion; and a portion of the display section located on a side of the main support layer remote from the main body section; and bending a plurality of layers of the stacked structure toward a back surface of the display device, the back surface of the display device being opposite to a light emitting surface of the display device.

Optionally, the method further comprises: arranging an original supporting layer; folding the primary support layer to form the folded-back portion and the main body portion, the folded-back portion and a part of the main body portion forming a double-layer structure; and pressing at least the double-layered structure to achieve a curvature matching a curvature of the main support layer.

Optionally, bending the plurality of layers of the stacked structure comprises pressing the edge portion of the display device using a profile indenter.

Drawings

In accordance with various disclosed embodiments, the following drawings are merely examples for illustrative purposes and are not intended to limit the scope of the utility model.

Fig. 1A is a schematic diagram of a display device in some embodiments according to the present disclosure.

Fig. 1B is a schematic diagram of a display device in some embodiments according to the present disclosure.

Fig. 1C is a plan view of a display device in some embodiments according to the present disclosure.

Fig. 2 is a partial cross-sectional view of a display device in some embodiments according to the present disclosure.

Fig. 3 is a further enlarged view of the stacked structure in some embodiments according to the present disclosure.

Fig. 4 is a further enlarged view of an area surrounding a bonding area where a flexible printed circuit is bonded to a connection portion of a display device in some embodiments according to the present disclosure.

Fig. 5 is a partial cross-sectional view of a display device in some embodiments according to the present disclosure.

Fig. 6 is a further enlarged view of the stacked structure in some embodiments according to the present disclosure.

Fig. 7 illustrates a process of bending an edge portion of a display device using a profile indenter in some embodiments according to the present disclosure.

Detailed Description

The present disclosure will now be described more specifically with reference to the following examples. It should be noted that the following description of some embodiments presented herein is for the purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.

The present disclosure provides, among other things, a display apparatus and a method of manufacturing the display apparatus that substantially obviate one or more problems due to limitations and disadvantages of the related art. In one aspect, the present disclosure provides a display device. In some embodiments, a display apparatus includes a display panel having a display portion, a connection portion, and a bending portion, wherein the bending portion connects the display portion and the connection portion; a main support layer; and an auxiliary support layer including a main body portion and a folded-back portion connected to the main body portion as a unitary structure. Optionally, the edge portion of the display device comprises a stacked structure comprising: the connecting portion; the folded-back portion on the connecting portion; a part of the main body portion on a side of the folded-back portion away from the connecting portion; and the display portion located on a side of the portion of the main body portion remote from the folded-back portion. Optionally, the plurality of layers of the stacked structure are bent toward a back surface of the display portion, the back surface of the display portion being opposite to the connection portion.

Fig. 1A is a schematic diagram of a display device in some embodiments according to the present disclosure. Referring to fig. 1A, the display device includes a display panel having a display portion DP in which an image is displayed by a sub-pixel array in the display portion in at least a portion thereof. The display portion DP itself may include a display area and a peripheral area surrounding the display area. Although a rectangular display area is shown in fig. 1A, the display portion DP may have any suitable shape and size. Examples of suitable shapes of the display portion DP include a circle, a square, a hexagon, an ellipse, and an irregular polygon. Each sub-pixel in the display portion DP may be electrically connected to a pixel driving circuit including one or more thin film transistors. The display device further includes gate lines and data lines for supplying signals for driving image display in the display portion DP. These signal lines are electrically connected to one or more integrated circuits, such as a gate driver integrated circuit and a data driver integrated circuit. One or more integrated circuits may be integrated into the display panel (chip on glass) or mounted on a flexible printed circuit (chip on film). One or more integrated circuits are electrically connected to the flexible printed circuit. The display device further includes various other signal lines such as a high voltage power line VDD, a low voltage power line VSS, and a start signal line.

The display apparatus further includes a bending portion PBP and a connection portion CP. The connection portion CP is a portion where the flexible printed circuit can be bonded to the display device. The bending part PBP is flexible or bendable. As shown in fig. 1A, the bending portion PBP may be bent in the direction of an arrow shown in fig. 1A so that the connection portion CP may be bent toward the back surface of the display portion. Fig. 1B is a schematic diagram of a display device in some embodiments according to the present disclosure. Fig. 1B shows the display device in which the bending portion PBP is bent and the connection portion CP is bent toward the rear surface of the display portion. Alternatively, the connection portion CP can display an image. Alternatively, the bent portion BP can display an image.

Fig. 1C is a plan view of a display device in some embodiments according to the present disclosure. Referring to fig. 1C, in some embodiments, the display portion DP includes a display region DR in which an image is displayed, and a fan-out region FR between the display region DR and the bending portion PBP. The display portion DP includes a plurality of signal lines SL extending through the fan-out region FR.

As used herein, the term "display area" refers to an area of a display panel in a display device that actually displays an image. Alternatively, the display region may include a sub-pixel region and an inter-sub-pixel region. The sub-pixel region refers to a light emitting region of a sub-pixel, for example, a region corresponding to a pixel electrode in a liquid crystal display or a region corresponding to a light emitting layer in an organic light emitting diode display panel. The inter-subpixel region refers to a region between adjacent subpixel regions, for example, a region corresponding to a black matrix in a liquid crystal display or a region corresponding to a pixel defining layer in an organic light emitting diode display panel. Optionally, the inter-sub-pixel region is a region between adjacent sub-pixel regions in the same pixel. Optionally, the inter-sub-pixel region is a region between two adjacent sub-pixel regions in two adjacent pixels. Optionally, the display device is a flexible display device.

Fig. 2 is a partial cross-sectional view of a display device in some embodiments according to the present disclosure. In one example, fig. 2 is a partial cross-sectional view along line a-a' of the display device in fig. 1B. Referring to fig. 2, in some embodiments, a display device includes a display panel. In some embodiments, as shown in fig. 2, the display panel includes a display portion DP, a connection portion CP, and a bending portion BP. The bent portion BP connects the display portion DP and the connection portion CP. The bent portion is bent along an edge E of the display device. As shown in fig. 2, the bending portion BP is bent to form a bending cavity BC.

In some embodiments, the display apparatus further includes a main support layer SUSm and an auxiliary support layer SUSa. The main support layer SUSm and the auxiliary support layer SUSa are positioned between the connection portion CP and the display portion DP. In some embodiments, the stacked structure is formed in at least an edge portion EP of the display device. The stack structure includes: a connection portion CP; an auxiliary support layer SUSa on the connection portion CP; a portion of the main support layer SUSm; and a portion of the display portion DP located at a side of the portion of the main support layer SUSm away from the auxiliary support layer SUSa.

The utility model of the present disclosure has surprisingly and unexpectedly found that a stacked structure having a complex structure described in the present disclosure can realize a display device that eliminates many problems including deformation and cracking in the edge portion and peeling of the flexible printed circuit. The display device having the present stack structure achieves very high adhesive strength between layers in the edge portion where the display device is less likely to be deformed during the pad bending process, and the flexible printed circuit can be firmly attached to the connection portion for an extended period of time.

In some embodiments, the auxiliary support layer SUSa has a unique structure including a main body portion MP and a folded-back portion FBP as an integral structure, the folded-back portion FBP being connected to the main body portion MP. The folded-back portion FBP is folded onto the back of the body portion MP to form a double-layered structure. Accordingly, in some embodiments, the stacked structure includes a connection portion CP; a folded-back portion FBP on the connection portion CP; at least a part of the body portion MP, which is located on a side of the folded-back portion FBP away from the connection portion CP; a part of the main support layer SUSm, which is located on a side of the main body portion MP away from the folded-back portion FBP; and a portion of the display portion DP located at a side of the portion of the main support layer SUSm away from the main body portion MP.

Fig. 3 is a further enlarged view of the stacked structure in some embodiments according to the present disclosure. Referring to fig. 3, the folded-back portion FBP is at least partially in contact with a rear surface of the main body portion MP, which is a surface of the main body portion MP on a side away from the main support layer SUSm. The utility model of this disclosure finds that the stacked structure is particularly resistant to cracking and deformation when the folded back portion FBP and the main body portion MP are formed as a unitary structure. For example, in some embodiments, the folded back portion FBP and the body portion MP are fabricated by folding the raw support layer. The primary support layer is folded along the fold line to form the folded back portion FBP and the main body portion MP. As described above, the folded-back portion FBP is folded onto the back surface of the main body portion MP. Thus, in some embodiments, the folded back portion FBP and the body portion MP are made of the same material. Fig. 3 shows a portion FP of the auxiliary support layer SUSa where the folding back portion FBP and the main body portion MP are connected to each other. As shown in fig. 3, the portion FP is directly adjacent to the bending cavity BC.

Alternatively, in a process when the folded-back portion FBP is folded onto the back surface of the main body portion MP, a portion FP connecting the folded-back portion FBP and the main body portion MP is formed. Thus, the FP portion may be considered as a side of the auxiliary support layer SUSa directly adjacent to the bending cavity BC. Optionally, the thickness of the portion FP is the sum of the thickness of the body portion MP and the thickness of the folded back portion FBP. Optionally, each of the thickness of the body portion MP and the thickness of the folded-back portion FBP is in a range of 0.05mm to 0.25mm, for example, 0.05mm to 0.10mm, 0.10mm to 0.15mm, 0.15mm to 0.20mm, or 0.20mm to 0.25 mm. In one example, each of the thickness of the body portion MP and the thickness of the folded-back portion FBP is 0.15 mm.

In some embodiments, the plurality of layers of the stacked structure are bent toward the back surface BS of the display section. Optionally, the rear face BS of the display device is opposite to a light emitting face LES of the display device where the display device is configured to emit light for image display. As used herein, the term "curved" refers to an action that is offset from a reference plane (e.g., a plane containing the non-bent portion of the display device) by greater than 1 degree and less than or equal to 45 degrees (e.g., less than or equal to 40 degrees, less than or equal to 35 degrees, less than or equal to 30 degrees, less than or equal to 25 degrees, less than or equal to 20 degrees, less than or equal to 15 degrees, less than or equal to 10 degrees, or less than or equal to 5 degrees) or results in such an offset action. As used herein, the term "bending" refers to an action that is or results in a deflection of greater than or equal to 90 degrees (e.g., greater than or equal to 100 degrees, greater than or equal to 110 degrees, greater than or equal to 120 degrees, greater than or equal to 130 degrees, greater than or equal to 140 degrees, greater than or equal to 150 degrees, greater than or equal to 160 degrees, greater than or equal to 170 degrees, greater than or equal to 175 degrees, greater than or equal to 179 degrees, or 180 degrees) from a reference plane.

In some embodiments, at least portions of the folded back portion FBP and the body portion MP have matching curvatures. As used herein, the term "curvature" refers to the rate of change of angle of a curved object or curved line segment. As used herein, the term "matching" curvature means that two curved objects have matching rates of angular change along at least portions of the two curved objects that are adjacent to each other. In one example, the two curved objects have matching curvatures such that adjacent surfaces of the two curved objects are substantially exact counterparts of each other, e.g., complementary to each other.

In some embodiments, at least portions of the folded back portion FBP, the main body portion MP, and the main support layer SUSm have matching curvatures. In one example, the portions of the folded back portion FBP, the main body portion MP and the main support layer SUSm are subjected to a pressing action by, for example, a profile ram having a surface with a desired curvature.

In some embodiments, each of the plurality of layers of the stacked structure and an adjacent layer have matching curvatures. In one example, as shown in fig. 2, the stacked structure includes a display portion DP, a first back film BF1 on the display portion DP, a first optically transparent adhesive layer OCA1 located on a side of the first back film BF1 away from the display portion DP, a portion of the main support layer SUSm located on a side of the first optically transparent adhesive layer OCA1 away from the first back film BF1, a body portion MP located on a side of the portion of the main support layer SUSm away from the first optically transparent adhesive layer OCA1, a folded-back portion FBP located on a side of the body portion MP away from the main support layer SUSm, a second back film BF2 located on a side of the folded-back portion FBP away from the body portion MP, and a connection portion CP located on a side of the second back film BF2 away from the folded-back portion FBP. In one example, the first optically clear adhesive layer OCA1, the main support layer SUSm, and the first back film BF1 have matching curvatures. In another example, the second back film BF2, the connection portion CP, and the folded-back portion FBP have matching curvatures.

In some embodiments, the display device further includes a flexible printed circuit FPC bonded to the connection portion CP. Fig. 4 is a further enlarged view of an area surrounding a bonding area where a flexible printed circuit is bonded to a connection portion of a display device in some embodiments according to the present disclosure. Referring to fig. 4, in some embodiments, the flexible printed circuit FPC includes a chip portion CHP on a rear surface of the display device, a bonding portion BDP having a plurality of bonding pads bonded to the connection members CP, and an extension portion ETP connecting the chip portion CHP and the bonding portion BDP. The engagement portion BDP is in contact with the connection portion CP, and the extension portion ETP is not in contact with the connection portion CP. Optionally, the chip portion CHP is in contact with the main support layer SUSm or a layer above the main support layer SUSm, while the extension portion ETP is not in contact with the main support layer SUSm or a layer above the main support layer SUSm.

In the present display device, the joining portion BDP and the extending portion ETP may be formed to be substantially flat and substantially free from a level difference due to a complicated structure of a laminated structure in the edge portion. In some embodiments, the first average distance d1 between the surface S1 of the primary support layer dism on the side closer to the primary support layer SUSm and the surface of the primary support layer SUSm on the side closer to the primary support layer BDP is substantially the same as the second average distance d2 between the surface S2 of the extension portion ETP on the side closer to the primary support layer SUSm and the surface of the primary support layer SUSm on the side closer to the extension portion ETP. In some embodiments, the surface S1 of the engagement portion BDP on the side adjacent to the main support layer SUSm and the surface S2 of the extension portion ETP on the side adjacent to the main support layer SUSm are substantially coplanar. As used herein, the term "substantially coplanar" refers to two or more surfaces on a structure sharing the same common plane or being offset from sharing the same common plane by no more than 0.05mm (e.g., no more than 0.04mm, no more than 0.03mm, no more than 0.02mm, no more than 0.01mm, no more than 0.005mm, or no more than 0.001 mm).

Fig. 5 is a partial cross-sectional view of a display device in some embodiments according to the present disclosure. Referring to fig. 5, the display device includes an auxiliary support layer SUSa having a single-layer structure, for example, lacking a double-layer structure formed by folding. The utility model of the present disclosure finds that the display device in fig. 5 results in a larger step difference sd between the engagement portion BDP and the extension portion ETP. Typically, the step difference sd in the display device is larger than 0.15 mm. Since the large step difference sd exists between the bonding portion BDP and the extension portion ETP, the flexible printed circuit is liable to generate a peeling defect. In order to make the display device less prone to peeling defects, it is generally necessary to space the chip portion CHP from the connection portion CP by a large distance w 2. Generally, the chip portion CHP must be spaced apart from the connection portion CP by a distance w2 that is at least 10 times (e.g., 1.5mm) the step difference sd to reduce peeling defects.

Referring again to fig. 2 and 4, by having a unique stack structure as described in the present disclosure, the engagement portion BDP and the extension portion ETP may be formed to be substantially flat and substantially free of a level difference, as described above. By making the bonding portion BDP and the extension portion ETP substantially flat and substantially free from a level difference, the chip portion CHP does not have to be spaced apart from the connection portion CP by a large distance as in fig. 5. In some embodiments, the orthographic projection of edge E2 of connection portion CP near chip portion CHP on main support layer SUSm is spaced apart from the orthographic projection of edge E3 of chip portion CHP near folded back portion FBP on main support layer SUSm by a distance w2 of less than 1.2mm, e.g., less than 1.1mm, less than 1.0mm, less than 0.9mm, or less than 0.8 mm. Optionally, the distance w2 is 0.7 mm. The orthographic projection of edge E1 of the folded-back portion FBP near the chip portion CHP on the main support layer SUSm is between the orthographic projection of edge E2 of the connection portion CP near the chip portion CHP on the main support layer SUSm and the orthographic projection of edge E3 of the chip portion CHP near the folded-back portion FBP on the main support layer SUSm.

In some embodiments, the orthographic projection of edge E1 of folded back portion FBP near chip portion CHP on main support layer SUSm is spaced apart from the orthographic projection of edge E2 of connecting portion CP near chip portion CHP on main support layer SUSm by a distance w1 of 0.2mm or more. The orthographic projection of edge E1 of the folded-back portion FBP close to the chip portion CHP on the main support layer SUSm is between the orthographic projection of edge E2 of the connection portion CP close to the chip portion CHP on the main support layer SUSm and the orthographic projection of edge E3 of the chip portion CHP close to the folded-back portion FBP on the main support layer SUSm. By having a separation distance w1 of 0.2mm or more, it can be ensured that the joining area is substantially flat.

In some embodiments, referring to fig. 2 and 3, the stack structure further includes a first back film BF1 covering the back surface of the display portion DP, the first back film BD1 being located between the display portion DP and a portion of the main support layer SUSm; and a second back film BF2 covering the back surface of the connection portion CP, the second back film BF2 being located between the connection portion CP and the folded back portion FBP. The bent portion BP does not include the first back film BF1, and does not include the second back film BF 2.

Fig. 6 is a further enlarged view of the stacked structure in some embodiments according to the present disclosure. Referring to fig. 6, an orthographic projection of the folded-back portion FBP on the second back film BF2 does not overlap a portion FP of the second back film BF2, which portion FP extends toward the bent portion BP beyond a portion of the auxiliary support layer SUSa where the folded-back portion FBP and the main body portion MP are connected to each other. Alternatively, the edge of the portion FP of the second back film BF2 is spaced apart from the portion of the auxiliary support layer SUSa where the folded-back portion FBP and the main body portion MP are connected to each other by a distance d3 of 0.15mm or more. By having such a spacing distance, the second back film BF2 can be made more resistant to strain and stress caused by bending.

Referring again to fig. 2, in some embodiments, the stacked structure further includes a first optically clear adhesive layer OCA1 between the first back film BF1 and the main support layer SUSm, the first optically clear adhesive layer OCA1 bonding the first back film BF1 and the main support layer SUSm together; a polarizer PL located on the side of the display portion DP away from the first back film BF 1; a second optically clear adhesive layer OCA2 on the side of the polarizer PL remote from the display portion DP; and a cover CG on the side of second optically clear adhesive layer OCA2 remote from polarizer PL.

In some embodiments, the display device further comprises a coating layer CL covering a back surface of the bending part BP opposite to the side directly surrounding the bending cavity BC.

In another aspect, the present disclosure provides a method of manufacturing a display device. In some embodiments, the method includes providing a display panel; bending the display panel to form a bent portion, a display portion, and a connection portion, the bent portion connecting the display portion and the connection portion; arranging a main supporting layer; providing an auxiliary support layer comprising a main body portion and a folded-back portion as a unitary structure, the folded-back portion being connected to the main body portion; disposing the main support layer and the auxiliary support layer between the connection part and the display part, thereby forming a stacked structure in an edge part of the display device, wherein the stacked structure includes the connection part; the folded-back portion on the connecting portion; at least a part of the main body portion on a side of the folded-back portion away from the connecting portion; a portion of the main support layer on a side of the main body portion remote from the folded-back portion; and a portion of the display section on a side of the portion of the main support layer remote from the main body section; and bending the plurality of layers of the stacked structure toward a back surface of the display device, the back surface of the display device being opposite to a light emitting surface of the display device.

In some embodiments, the method further comprises providing a proto-support layer; folding the primary support layer to form the folded-back portion and the main body portion, the folded-back portion and a part of the main body portion forming a double-layer structure; and pressing at least the double-layered structure to achieve a curvature matching a curvature of the main support layer.

In some embodiments, the method further comprises bending the plurality of layers of the stacked structure, including pressing an edge portion of the display device using a profile indenter. Fig. 7 illustrates a process of bending an edge portion of a display device using a profile indenter in some embodiments according to the present disclosure.

The first and second backing films may be fabricated using a variety of suitable materials and a variety of suitable fabrication methods. For example, a flexible organic polymer material may be used to form the first and second backing films. Examples of suitable flexible organic polymeric materials include, but are not limited to, polyimides, polycarbonates, polyethersulfones, polyethylene terephthalates, polyethylene naphthalates, polyarylates, and fiber reinforced plastics.

The coating may be manufactured using a variety of suitable materials and a variety of suitable manufacturing methods. For example, a UV curable adhesive material may be used to form the coating. Examples of UV curable adhesives include UV curable adhesive materials comprising a free radical generating photoinitiator and a compound having multiple unsaturated groups (e.g., acrylate, methacrylate, or vinyl groups), such as an oligomer having multiple unsaturated groups and optionally a monomer having multiple unsaturated groups. Specific examples of free radical generating photoinitiators include, for example, type I or type II photoinitiators, such as benzoin ethers, 1-hydroxy-cyclohexyl-ketones, or benzophenones, among others. Specific examples of oligomers having multiple unsaturated groups include acrylate oligomers such as epoxy acrylates (e.g., bisphenol-a-epoxy acrylate), aliphatic amino ester acrylates (e.g., IPDI based aliphatic amino ester acrylates), aromatic amino ester acrylates, polyether acrylates, polyester acrylates, aminated acrylates, and acrylates (acrylic acrylates). Specific examples of the monomer include monofunctional monomers, difunctional monomers and trifunctional monomers such as trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, tripropylene glycol diacrylate, hexanediol diacrylate, isobornyl acrylate, isodecyl acrylate, ethoxylated phenyl acrylate, 2-phenoxyethyl acrylate and the like. Other examples of UV curable adhesives include UV curable adhesive materials comprising a cationic photoinitiator and an epoxy. Specific examples of cationic photoinitiators include onium salts such as arylsulfonium and aryliodonium salts. Specific examples of the epoxy compound include alicyclic epoxy compounds and aromatic epoxy compounds such as 3, 4-epoxy-cyclohexylmethyl-3, 4-epoxy-cyclohexane-carboxylate and bisphenol a diglycidyl ether, and polysiloxanes having an epoxy group and the like.

The optically clear adhesive layer can be prepared using a variety of suitable materials and a variety of suitable manufacturing methods. Examples of suitable optically clear adhesive materials include, but are not limited to, polyacrylic acids, such as Polymethylmethacrylate (PMMA); a cyclic olefin copolymer; a polycarbonate; an epoxy resin; a silicone-based optically clear adhesive material; or a combination thereof.

The lid may be manufactured using a variety of suitable materials and a variety of suitable manufacturing methods. Examples of suitable materials for making the cover include, but are not limited to, polyamines, such as colorless polyamines, thin glasses, ultra-thin glasses, polyethylene terephthalate, polyacrylates, polymethyl methacrylate, polycarbonate, polyethylene naphthalate, polyvinylidene chloride, polyvinylidene fluoride, polystyrene, ethylene vinyl alcohol copolymers, and/or combinations thereof. Optionally, the cap has a double layer structure comprising a first sub-layer, a second sub-layer and an adhesive sub-layer bonding the first and second sub-layers together. Optionally, the first and second sub-layers are made of a colorless polyamine, and the adhesive sub-layer is an optically clear adhesive sub-layer. Optionally, the cap further comprises a hard coating sublayer. Optionally, the lid further comprises a protective film.

The primary support layer may be fabricated using a variety of suitable materials and a variety of suitable fabrication methods. Optionally, the primary support layer comprises a metal support layer. The metallic support layer may be fabricated using a variety of suitable materials and a variety of suitable fabrication methods. For example, a metallic material may be used to form the metallic support layer. Examples of suitable metallic materials include, but are not limited to, aluminum, copper, stainless steel, and various suitable alloys or laminates. Optionally, the primary support layer comprises a layer of organic material (e.g., a foam layer). For example, organic polymer materials may be used to form the organic material layer (e.g., foam layer). Examples of suitable organic polymeric materials include, but are not limited to, polyethylene terephthalate.

The auxiliary support layer may be fabricated using various suitable materials and various suitable fabrication methods. Optionally, the auxiliary support layer comprises a metal support layer. The metallic support layer may be fabricated using a variety of suitable materials and a variety of suitable fabrication methods. For example, a metallic material may be used to form the metallic support layer. Examples of suitable metallic materials include, but are not limited to, aluminum, copper, stainless steel, and various suitable alloys or laminates. Optionally, the auxiliary support layer comprises an organic material layer (e.g., a foam layer). For example, organic polymer materials may be used to form the organic material layer (e.g., foam layer). Examples of suitable organic polymeric materials include, but are not limited to, polyethylene terephthalate.

The foregoing descriptions of embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the utility model to the precise form or exemplary embodiments disclosed. The foregoing description is, therefore, to be considered illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to explain the principles of the utility model and its best mode practical application to enable one skilled in the art to understand the utility model for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the utility model be defined by the following claims and their equivalents, in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Thus, the terms "present invention" and the like do not necessarily limit the scope of the claims to particular embodiments, and references to exemplary embodiments of the utility model are not meant to limit the utility model, and no such limitation is to be inferred. The utility model is to be limited only by the spirit and scope of the appended claims. Furthermore, these claims may refer to the use of "first," "second," etc., followed by a noun or element. These terms should be understood as nomenclature and should not be construed as limiting the number of elements modified by these nomenclature, unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the utility model. It will be appreciated that variations to the described embodiments may be made by those skilled in the art without departing from the scope of the utility model, as defined by the appended claims. Furthermore, no element or component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the appended claims.

Claims (15)

1. A display device, comprising:

a display panel having a display portion, a connection portion, and a bent portion, wherein the bent portion connects the display portion and the connection portion, and the bent portion is bent;

a main support layer; and

an auxiliary support layer including a main body portion and a folded-back portion as a unitary structure, the folded-back portion being connected to the main body portion;

wherein an edge portion of the display device includes a stacked structure including:

the connecting portion;

the folded-back portion on the connecting portion;

at least a part of the main body portion on a side of the folded-back portion away from the connecting portion;

a portion of the primary support layer; and

a portion of the display section on a side of the portion of the main support layer remote from the main body section;

wherein the plurality of layers of the stacked structure are curved toward a back surface of the display device, the back surface of the display device being opposite to a light emitting surface of the display device.

2. The display device according to claim 1, wherein the folded-back portion and the main body portion comprise the same material;

a part of the main body portion and the folded-back portion form a double-layer structure; and

the folded-back portion is at least partially in contact with a rear surface of the main body portion, the rear surface being a surface of a side of the main body portion remote from the main support layer.

3. The display device according to claim 2, wherein the bending portion is bent to form a bending cavity; and

the portion of the auxiliary support layer where the folded back portion and the main body portion are connected to each other directly abuts the bending cavity.

4. A display device as claimed in claim 2 or 3, characterised in that at least part of the folded back portion and the main body portion have matching curvatures.

5. The display device of claim 4, wherein at least portions of the folded back portion, the main body portion, and the main support layer have matching curvatures.

6. The display device according to any one of claims 1 to 3, wherein each layer and an adjacent layer of the plurality of layers of the stacked structure have matching curvatures.

7. The display device according to any one of claims 1 to 3, further comprising a flexible printed circuit bonded to the connection portion;

wherein the flexible printed circuit includes a chip portion on a rear surface of the display device, a bonding portion including a plurality of bonding pads bonded to the connection portion, and an extension portion connecting the chip portion and the bonding portion; and

a first average distance between a surface of the engaging part on a side close to the main support layer and a surface of the main support layer on a side close to the engaging part is substantially the same as a second average distance between a surface of the extending part on a side close to the main support layer and a surface of the main support layer on a side close to the extending part.

8. The display device of claim 7, wherein the surface of the engagement portion on a side proximate the main support layer and the surface of the extension portion on a side proximate the main support layer are substantially coplanar.

9. The display device according to claim 7, wherein an orthogonal projection of an edge of the folded-back portion near the chip portion on the main support layer is spaced from an orthogonal projection of an edge of the connection portion near the chip portion on the main support layer by a distance of 0.2mm or more;

an orthographic projection of an edge of the connecting portion near the chip portion on the main support layer is spaced apart from an orthographic projection of an edge of the chip portion near the folded-back portion on the main support layer by a distance of less than 1.0 mm; and

an orthographic projection of the edge of the folded-back portion near the chip portion on the main support layer is between an orthographic projection of the edge of the connecting portion near the chip portion on the main support layer and an orthographic projection of the edge of the chip portion near the folded-back portion on the main support layer.

10. The display device according to any one of claims 1 to 3, wherein the stack structure further comprises:

a first back film covering a back surface of the display part, the first back film being located between the display part and the part of the main support layer; and

a second back film covering a back surface of the connecting portion, the second back film being located between the connecting portion and the folded-back portion;

wherein the fold portion does not include the first backing film and does not include the second backing film.

11. The display device according to claim 10, wherein an orthographic projection of the folded-back portion on the second backsheet does not overlap with a portion of the second backsheet, the portion of the second backsheet extending toward the folded-back portion beyond a portion of the auxiliary support layer where the folded-back portion and the main body portion are connected to each other; and

an edge of the portion of the second back film is spaced apart from a portion of the auxiliary support layer where the folded-back portion and the main body portion are connected to each other by a distance of 0.15mm or more.

12. The display device according to claim 10, wherein the stacked structure further comprises:

a first optically clear adhesive layer between the first backing film and the portion of the primary support layer, the first optically clear adhesive layer bonding the first backing film and the primary support layer together;

a polarizer located on a side of the display portion away from the first back film;

a second optically transparent adhesive layer on a side of the polarizer remote from the display portion; and

a cover on a side of the second optically clear adhesive layer remote from the polarizer.

13. The display device of claim 3, further comprising a coating covering a back surface of the bend portion opposite a side of the bend portion immediately surrounding the bend cavity.

14. The display device according to any one of claims 1 to 3, wherein the main support layer comprises a metal material; and

the auxiliary support layer includes an organic polymer material.

15. The display device according to any one of claims 1 to 3, wherein the main support layer comprises a metal material; and

the auxiliary support layer includes a metal material.

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