CN112735279A

CN112735279A - Curved surface display screen module

Info

Publication number: CN112735279A
Application number: CN202110006128.9A
Authority: CN
Inventors: 张允题
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-04-30

Abstract

The embodiment of the application discloses curved surface display screen module, curved surface display screen module is including the apron, display panel and the heat dissipation composite bed of superpose in proper order: the cover plate is provided with a plane area and at least curved surface areas respectively positioned at two sides of the plane area; the display surface of the display panel is attached to the cover plate; the heat dissipation composite layer is attached to the back of the display panel and comprises a heat dissipation layer; the heat dissipation layer is provided with at least two curved side parts which respectively correspond to the two curved surface areas of the cover plate, and a plurality of holes are formed in the curved side parts. The application can reduce the stress of the curved side and increase the conformability.

Description

Curved surface display screen module

Technical Field

The application relates to the technical field of display panels, in particular to a curved surface display screen module.

Background

The flexible panel is developed on the basis of an Organic Light Emitting Diode (OLED) technology, and a curved screen mobile phone terminal with a bent cover plate edge appears based on the flexible OLED panel technology.

For the curved screen, when the bending angle of the left curved surface and the right curved surface of the glass cover plate is larger, the effect of front-view left-right frame-free is better, and when the bending angle of the left curved surface and the right curved surface is larger than 90 degrees, the front-view left-right frame-free effect can be realized. However, when the bending angle of the curved surface of the glass cover plate is larger, the stress of the heat dissipation film layer attached to the curved surface region is also larger, and stress concentration occurs at the curved surface region, which causes undesirable problems such as peeling (peeling) between the film layers, crack (crack) of the film layers, and breakage of metal wires in the display panel. In addition, the heat dissipation film layer formed by the copper foil has high hardness and young's modulus, and the conformability is not good enough, so that a larger bonding pressure is needed when the heat dissipation film layer is bonded, and the problems of peeling and cracking between the film layers, breakage of metal wires in the display panel and the like are further aggravated. The above problems seriously affect the yield of the product, and need to be solved.

Disclosure of Invention

The embodiment of the application provides a curved surface display screen module, can reduce two curved shape lateral parts of heat dissipation layer and receive the stress, increase its docile, and then solve peeling off between the rete, the rete breaks and the cracked problem of metal wiring in the display panel.

The embodiment of the application provides a curved surface display screen module, curved surface display screen module is including the apron, display panel and the heat dissipation composite bed of superpose in proper order, wherein:

the cover plate is provided with a plane area and at least curved surface areas respectively positioned at two sides of the plane area;

the display surface of the display panel is attached to the cover plate; and

the heat dissipation composite layer is attached to the back of the display panel and comprises a heat dissipation layer;

the heat dissipation layer is provided with at least two curved side parts which respectively correspond to the two curved surface areas of the cover plate, and a plurality of holes are formed in the curved side parts.

Further, the plurality of holes are all the same in shape and size.

Further, the plurality of holes are the same shape and different in size. Furthermore, the center of one part of the holes is positioned on the midline of the curved side part, the other part of the holes are distributed on two sides of the midline, and the sizes of the holes are decreased from the midline to two sides.

Further, the material of the heat dissipation layer is stainless steel.

Further, the plurality of holes are arranged in an array.

Further, the hole penetrates through the heat dissipation layer.

Further, the cross section of the hole is in the shape of a circle, an ellipse, a round bar, a diamond, a rectangle or a polygon.

Further, the heat dissipation composite layer further comprises a buffer layer, and the buffer layer is arranged between the display panel and the heat dissipation layer. Furthermore, the heat dissipation composite layer further comprises an adhesive layer, and the adhesive layer is arranged between the display panel and the buffer layer.

This application is through setting up a plurality of holes on the bent shape lateral part on the heat dissipation layer, can reduce the stress that bent shape lateral part of heat dissipation layer received and increase the docile nature on heat dissipation layer, and then solve because curved surface region department takes place stress concentration and leads to peeling off between the rete, the rete breaks and the cracked bad problem of metal routing in the display panel. In addition, the holes are subjected to unequal size processing, so that the size of the holes at the center line of the curved side portion is the largest, the sizes of the holes are gradually decreased from the center line to two sides, and the heat dissipation layer has the function of protecting the display panel while reducing stress and increasing the fitting performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a perspective view of a cover plate of a curved display screen module according to an embodiment of the invention.

Fig. 2 is a cross-sectional view of a cover plate of a curved display screen module according to an embodiment of the invention.

Fig. 3 is a perspective view of a curved display screen module according to an embodiment of the invention.

Fig. 4 is a schematic view of the stack of the T region in fig. 3.

Fig. 5 is a schematic stacked view of the heat dissipation composite layer of the curved display module according to the embodiment of the invention.

Fig. 6 is a perspective view of a heat dissipation layer of the curved display screen module according to the embodiment of the invention.

FIG. 7 is a schematic plan view of a heat dissipation layer of the curved display module according to the embodiment of the invention.

Fig. 8 is an enlarged view of the region S in fig. 7.

Fig. 9 is an enlarged view of the region S in fig. 7.

Fig. 10 is a schematic stacked view of a curved display screen module according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

The embodiment of the application provides a curved surface display screen module. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

Specifically, referring to fig. 1 to 10, an embodiment of the invention provides a curved display panel module, which includes a cover plate 300, a display panel 200 and a heat dissipation composite layer 100 stacked in sequence.

As shown in fig. 1 and fig. 2, the cover plate 300 has a planar region 310 and at least two curved regions 320 respectively located at two sides of the planar region 310, wherein the planar region 310 and the curved regions 320 at two sides together form an inner concave surface of the cover plate 300. The cover plate 300 serves to protect the display panel 200 and is light-transmissive, and may be a glass cover plate, for example. In one embodiment, the curved surface regions 320 are two in number, for example, respectively disposed on two opposite sides of the planar region 310, which is referred to as a hyperbolic cover plate (as shown in fig. 1); in another embodiment, the number of the curved surface regions 320 may be four, and the four curved surface regions are respectively disposed on four sides of the planar region 310. In the following description, a hyperbolic cover plate is taken as an example for illustration, but the hyperbolic cover plate is only used for illustrative purposes and is not used to limit the invention.

As shown in fig. 3 and 4, fig. 3 shows a perspective view of the curved display screen module, and fig. 4 shows a schematic stacked view of the T region in fig. 3. The display surface of the display panel 200 is attached to the cover plate 300; specifically, the display panel 200 is attached to the inner concave surface of the cover plate 300. The display panel 200 is used for displaying, and is preferably a flexible OLED display panel, so that two sides of the display panel 200 can extend to the curved surface area 320, that is, the display panel 200 is attached to the planar area 310 and the curved surface area 320 at the same time.

As shown in fig. 3 and 4, the heat dissipation composite layer 100 is attached to the back surface of the display panel 200.

As shown in fig. 5, the heat dissipation composite layer 100 includes at least a heat dissipation layer 110. The heat dissipation layer 110 has a heat dissipation function, so that the heat dissipation composite layer 100 has a heat dissipation function, and in addition, the heat dissipation composite layer 100 may have other functions because it includes other film layers. For example, in an embodiment, as shown in fig. 5, the heat dissipation composite layer 100 may further include a buffer layer 120 for protecting the display panel 200, wherein the buffer layer 120 may be foam; further, the heat dissipation composite layer 100 may further include an adhesive layer 130 for adhering the buffer layer 120 to the display panel 200, where the adhesive layer 130 may be a grid adhesive; the buffer layer 120 is located between the heat dissipation layer 110 and the adhesive layer 130, and the adhesive layer 130 is disposed at the topmost portion of the heat dissipation composite layer 100 to be attached to the display panel 200. It should be noted that, when other film layers are disposed between the display panel 200 and the heat dissipation composite layer 100, the adhesive layer 130 is adhered to the other film layers.

As shown in fig. 6 and 7, wherein fig. 6 is a perspective view of the heat dissipation layer 110, and fig. 7 is a planar expanded view (flat state) of the heat dissipation layer 110, the heat dissipation layer 110 has a flat portion 111 and at least two curved side portions 112; wherein the flat portion 111 corresponds to the planar area 310 of the cover plate 300 and is attached to the planar area 310; the two curved sides 112 are located on two opposite sides of the flat 111; the two curved sides 112 correspond to the two curved regions 320 of the cover plate 300, respectively, and are attached to the two curved regions 320. In fig. 7, a left boundary line between the flat portion 111 and the curved side portion 112 located on the left side is denoted by X-X, and a right boundary line between the flat portion 111 and the curved side portion 112 located on the right side is denoted by Y-Y.

As shown in fig. 6 and 7, the curved side 112 is provided with a plurality of holes 113. For example, patterned openings may be formed in each of the curved side portions 112, and the openings may be formed using a die-cutting process. It should be noted that the flat portion 111 of the heat dissipation layer 110 does not need to be perforated; in addition, in the heat dissipation composite layer 100, the film layers with high conformability and small hardness and young's modulus, such as the buffer layer 120 and the adhesive layer 130, do not need to be perforated, and the whole design can be maintained to protect the display panel 200.

The holes are formed in the curved side portion 112 of the heat dissipation layer 110, so that the hardness and Young modulus of the heat dissipation layer can be greatly reduced, the fitting performance of the heat dissipation layer is enhanced, the stress on the curved side portion 112 of the heat dissipation layer 110 is reduced, the problems of peeling between films, film cracking and metal wiring cracking in the display panel 200 caused by stress concentration of the curved surface of the curved side portion 112 are solved, smaller fitting pressure can be selected during fitting due to the fact that the fitting performance is enhanced, the risk of metal wiring cracking in the display panel 200 caused by overlarge fitting pressure is further reduced, and meanwhile, the risk of peeling between films and film cracking is also reduced.

The holes 113 preferably extend through the heat dissipation layer 110, which may better reduce the stress experienced by the heat dissipation layer 110.

Optionally, the shape of the cross section of the hole 113 includes, but is not limited to, circular (as shown in fig. 8), oval, round bar (as shown in fig. 9), diamond, rectangular or polygonal, wherein the shape of the hole 113 is preferably curved at least partially at its edge and without tip, such as circular, oval, round bar, etc., because the curved shape has a better transition effect on stress and thus can avoid stress concentration, and the tip-free shape can also better avoid stress concentration.

In some embodiments, the arrangement of the plurality of holes 113 is not limited.

In some embodiments, the plurality of holes 113 may be arranged in a regular pattern, for example, as shown in fig. 8, the plurality of holes 113 on each of the curved sides 112 are arranged with the center line Z-Z of the curved side 112 as the center axis and are arranged in axial symmetry on both sides of the center axis; the plurality of wells 113 may be arranged in an array (as shown in fig. 8) or in a non-array (as shown in fig. 9). It should be noted that the midline of the curved side portion 112 refers to the midline Z-Z of the curved side portion 112 in a state where the curved side portion 112 is laid flat, as shown in fig. 8, the midline Z-Z of the curved side portion 112 on the right side of the flat portion 111 in fig. 7 is parallel to the right boundary line Y-Y, and similarly, the midline of the curved side portion 112 on the right side of the flat portion 111 is parallel to the left boundary line X-X (not shown in fig. 8).

In one embodiment, all of the apertures 113 are the same shape and size. Exemplarily, as shown in fig. 9, which is a partially enlarged view of the region S in fig. 7, an example of forming a round bar hole of an equal size on the curved side portion 112 of the heat dissipation layer 110 is shown, wherein the flat portion 111 is not subjected to a hole forming process; in fig. 9, the holes 113 are in the shape of circular strips, specifically, the middle of each circular strip is elongated, and the two ends of each circular strip are in the shape of a semicircle (or arc), and are hereinafter referred to as circular strip holes, and the circular strip holes are periodically arranged, so that stress concentration can be avoided. As shown in fig. 9, the length of the round bar hole is 5.5 to 6.5mm, the width i of the round bar hole is 0.1 to 0.2mm, the distance m between two transversely adjacent round bar holes is 0.1 to 0.15mm, the distance p between two longitudinally adjacent round bar holes is 0.2 to 0.25mm, the distance j between the round bar hole and the bending point (i.e., the right boundary Y-Y) of the curved side portion 112 is 1mm, the distance k between the round bar hole and the edge of the heat dissipation layer 110 is 1mm, and the depth of the round bar hole is 0.15 mm. It should be noted that the above data on the size are only for illustrative purposes and are not intended to limit the present invention, and those skilled in the art can adjust the size according to specific situations, but the adjusted solution still belongs to the protection scope of the present invention.

In another embodiment, the plurality of holes 113 are the same shape and different sizes. It should be noted that the different sizes include the case where the sizes of the plurality of holes 113 are completely different, that is, the sizes of all the holes 113 are different; it also includes the case that the plurality of holes 113 are not exactly the same size, i.e., the partial holes 113 are the same size and the partial holes 113 are different sizes. It should be noted that the size of the hole 113 in this embodiment mainly refers to the aperture, i.e., the diameter, of the hole 113.

In one embodiment, as shown in fig. 8, a portion of the holes 113 of the plurality of holes 113 are centered on a middle line Z-Z of the curved side portion 112, another portion of the holes 113 are distributed on two sides of the middle line Z-Z, and the size of the holes 113 decreases from the middle line Z-Z to the two sides. The central line Z-Z of the curved side portion 112 is a stress concentration portion, and the stress applied to the curved side portion 112 is the largest, and the stress applied to the curved side portion 112 is gradually reduced from the central line Z-Z to both sides, so that the size of the hole 113 at the central line Z-Z is set to be the largest, the stress applied to the hole can be greatly reduced, and the stress concentration is reduced, and the size of the hole 113 at both sides of the central line Z-Z is gradually reduced from the central line Z-Z to both sides, so that the function of protecting the display panel 200 can be achieved while the stress is reduced, the conformability of the display panel is improved, and the function of protecting the display panel 200.

Illustratively, as shown in fig. 8, which is a partially enlarged view of the region S in fig. 7, an example of forming unequal circular holes on the curved side portions 112 of the heat dissipation layer 110 is shown, wherein the flat portions 111 are not perforated; in fig. 8, the holes 113 are circular in shape, hereinafter referred to as circular holes, wherein a part of the circular holes are centered on the middle line Z-Z of the curved side portion 112, and another part of the circular holes are distributed on both sides of the middle line Z-Z, and the size of the circular holes decreases from the middle line to both sides; the circular holes are arranged in an array, and the circular holes distributed on two sides of the center line Z-Z are distributed in an axial symmetry mode by taking the center line Z-Z as a symmetry axis. A specific dimensioning of the circular holes is provided below by way of example, as shown in fig. 8, the diameter of the largest circular hole at the position of the middle line Z-Z being 1 mm; taking the central line Z-Z as a symmetry axis, wherein circular holes at two sides of the central line Z-Z are mutually symmetrical, and the diameters of the circular holes are sequentially 0.75mm for b, 0.6mm for c and 0.45mm for d; the distance between every two transversely adjacent round holes is 0.15mm, and the distance between the centers of two longitudinally adjacent round holes is 1.2 mm; the distance g between the round hole and the bending point (namely the right boundary Y-Y) of the curved side part 112 is 1 mm; the distance f between the round hole and the edge of the heat dissipation layer 110 is 1 mm; the depth of the circular hole is 0.15mm, which is the thickness of the heat dissipation layer 110. It should be noted that the above data on the size are only for illustrative purposes and are not intended to limit the present invention, and those skilled in the art may make adjustments according to specific situations, but the adjusted solution also falls within the protection scope of the present invention.

The material of the heat dissipation layer 110 includes, but is not limited to, stainless steel (SUS) or copper foil, and the stainless steel or copper foil is used to make the heat dissipation layer 110 have heat dissipation and electromagnetic shielding functions. The stainless steel is preferable, because the copper foil is weak in anti-marking capability, a polyimide film layer is generally required to be added to prevent marks generated by bending (padending) of the terminal area, the hardness of the stainless steel is higher than that of the copper foil, the hardness and stress of the stainless steel material of the curved side portion 112 can be reduced through the hole forming treatment, and for the flat portion 111 which is not formed with holes in the whole piece, the hardness of the stainless steel with the same thickness is higher than that of the copper foil, the anti-marking effect of the stainless steel is stronger than that of the copper foil, so that the polyimide film layer added for preventing marks generated by bending of the terminal area can be omitted, and the cost is saved.

It should be noted that, although only the foregoing structures are described in the curved display screen module, it is understood that, in addition to the foregoing structures, the curved display screen module according to the embodiment of the present invention may further include any other necessary structures as needed, for example: a transparent optical adhesive layer (OCA)600 for adhering the cover plate 300 to a structure below the cover plate (e.g., the display panel 200); a circular Polarizer (POL) 500 disposed on a surface of the display panel 200 for preventing the reflection of ambient light to the display screen module; a Back plate film (BP) 400 disposed on a rear surface of the display panel 200 to protect and support the display panel 200. Fig. 9 is a schematic view illustrating a stack structure of the curved display panel module having the above structure, and since fig. 9 is only used to illustrate a positional relationship between the films, the bent portions on two sides of a portion of the films are not shown, the curved display panel module includes a cover plate 300, a transparent optical adhesive layer 600, a circular polarizer 500, a display panel 200, a back plate film 400, an adhesive layer 130, a buffer layer 120, and a heat dissipation layer 110, which are sequentially stacked from top to bottom.

The curved-surface display screen module provided by the embodiment of the application is described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a curved surface display screen module, its characterized in that, curved surface display screen module is including the apron, display panel and the heat dissipation composite bed of superpose in proper order, wherein:

the display surface of the display panel is attached to the cover plate; and

2. The curved display screen module of claim 1, wherein the plurality of apertures are identical in shape and size.

3. The curved display screen module of claim 1, wherein the plurality of apertures are identical in shape and different in size.

4. The curved display screen module of claim 3, wherein a portion of the holes are centered on a centerline of the curved side portions, and another portion of the holes are distributed on opposite sides of the centerline, and the size of the holes decreases from the centerline to the opposite sides.

5. The curved display screen module of claim 1, wherein the heat dissipation layer is made of stainless steel.

6. The curved display screen module of claim 1, wherein the plurality of apertures are arranged in an array.

7. The curved display screen module of claim 1, wherein the hole extends through the heat sink layer.

8. The curved display screen module of claim 1, wherein the cross-sectional shape of the aperture is circular, elliptical, circular bar, diamond, rectangular, or polygonal.

9. The curved display screen module of claim 1, wherein the heat dissipation composite layer further comprises a buffer layer disposed between the display panel and the heat dissipation layer.

10. The curved display screen module of claim 9, wherein the heat dissipation composite layer further comprises an adhesive layer disposed between the display panel and the buffer layer.