Display module, manufacturing method thereof, and display device

Abstract

The present application relates to a display module, a manufacturing method thereof, and a display device. The display module includes: a flexible display panel, the flexible display panel includes a first display area and a second display area, the second display area is bent toward the backlight side of the first display area; a functional layer, the functional layer covers the first display area and the second display area; a cover plate, the cover plate is arranged on the side of the functional layer away from the flexible display panel; and a closed structure, one end of the closed structure is connected to the surface of the cover plate close to the flexible display panel, and the other end is connected to the functional layer located at the second display area, so as to form a closed accommodating cavity between the closed structure, the cover plate and the functional layer, the accommodating cavity is filled with a first gas, and the refractive index of the first gas is less than 1. The present application is conducive to improving the brightness of the second display area and improving color deviation, thereby helping to improve the display effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module, a manufacturing method thereof, and a display device. Background Art

[0002] With the development of OLED display technology, people's requirements for display devices are getting higher and higher. In recent years, due to the continuous increase in demand, display devices are required to have a high screen-to-body ratio to improve the user's visual experience.

[0003] Related technologies employ a method of bending the display area of ​​a display panel to allow the edges of the display panel to display images, thereby achieving a borderless display and increasing the screen-to-body ratio of the display device. However, when using this method, the bent area of ​​the flexible display panel can experience poor brightness and color shift, which in turn affects the display quality. Summary of the Invention

[0004] Based on this, it is necessary to provide a display module and its manufacturing method, and a display device, aiming to solve the problem that the bending area of ​​the display area of ​​the flexible display panel will have poor brightness and color deviation, thereby affecting the display effect.

[0005] An embodiment of the first aspect of the present application proposes a display module, comprising: a flexible display panel, the flexible display panel comprising a first display area and a second display area, the second display area being bent toward the backlight side of the first display area; a functional layer, the functional layer covering the first display area and the second display area; a cover plate, the cover plate being arranged on a side of the functional layer away from the flexible display panel; and a closed structure, one end of the closed structure being connected to a surface of the cover plate close to the flexible display panel, and the other end being connected to the functional layer located covering the second display area, so as to form a closed accommodating cavity between the closed structure, the cover plate and the functional layer, the accommodating cavity being filled with a first gas, the refractive index of the first gas being less than 1.

[0006] In the present application, the light emitted from the bent second display area passes through the functional layer, the accommodating cavity and the cover plate in sequence and then enters the human eye. Since the refractive index of the functional layer and the first gas in the accommodating cavity is different, the light will be refracted at the boundary between the functional layer and the accommodating cavity. In this way, when the light enters the accommodating cavity, it will form a refracted light that is deflected toward the first display area, so that when the human eye observes from a direction perpendicular to the first display area, the angle between the human eye's line of sight and the refracted light, that is, the viewing angle, is reduced. In other words, after the accommodating cavity is filled with the first gas, more light can enter the human eye through refraction in the bent area of ​​the second display area, and the viewing angle of the light is reduced, which is beneficial to improving the brightness of the second display area and improving color deviation, thereby improving the display effect.

[0007] In some embodiments, the first gas includes at least one of carbon monoxide and hydrogen.

[0008] In some embodiments, the second display area includes a bent segment and a straight segment, the straight segment being bent toward the backlight side of the first display area via the bent segment; the functional layer includes a first sub-functional layer covering the first display area, a second sub-functional layer covering the bent segment, and a third sub-functional layer covering the straight segment. The shape of the functional layer is consistent with that of the flexible display panel, thereby improving the adhesion and bending performance between the functional layer and the flexible display panel.

[0009] In some embodiments, the enclosed structure includes a first portion extending along the thickness of the display module and a one-way valve disposed on the first portion. One end of the first portion is connected to a surface of the cover plate proximate to the flexible display panel, and the other end is connected to the outermost edge of the second sub-functional layer. This embodiment proposes one embodiment of the enclosed structure, consisting only of the first portion and the one-way valve, which helps simplify the structure of the enclosed structure and reduce its production cost.

[0010] In some embodiments, the closed structure includes a first part extending in the thickness direction of the display module, a second part connected to the first part, and a one-way valve provided on the first part, wherein the second part extends in the direction of the first display area along the bending section; the first part does not contact the outermost edge of the second sub-functional layer, the first part is connected to the side surface of the cover plate close to the flexible display panel, and the second part is connected to the third sub-functional layer. This embodiment proposes another structure of the closed structure. The first part and the second part are connected to form an L-shaped structure. On the one hand, it can avoid the first part of the closed structure from protruding outward, thereby facilitating the improvement of the screen-to-body ratio of the display module; on the other hand, when the second part of the L-shaped structure is connected to the third sub-functional layer, it is a connection between planes, which is also conducive to improving the convenience and stability of the connection between the second part and the third sub-functional layer, thereby facilitating the improvement of the reliability of the closed structure connection.

[0011] In some embodiments, the thickness of the first portion is 0.2 mm to 0.3 mm.

[0012] In some embodiments, the thickness of the second portion is 0.2 mm to 0.3 mm.

[0013] In some embodiments, the display module further includes a first adhesive layer, and the cover plate is bonded to the functional layer via the first adhesive layer. The orthographic projection of the first adhesive layer in the thickness direction of the display module and the orthographic projection of the second display area in the thickness direction of the display module do not overlap. In this way, light emitted from the bent section in the second display area passes only through the second sub-functional layer, the accommodating cavity, and the cover plate, and not through the first adhesive layer. This helps reduce light energy loss in the bent section in the second display area, thereby further improving the brightness of the second display area and enhancing the display quality.

[0014] In some embodiments, the functional layer includes a polarizer layer, which can block reflection of external light, thereby facilitating improvement of the contrast of the display module.

[0015] An embodiment of the second aspect of the present application provides a display device, which includes the display module described in the first aspect.

[0016] An embodiment of the third aspect of the present application provides a method for manufacturing a display module, comprising:

[0017] Providing a flexible display panel, the flexible display panel comprising a first display area and a second display area, wherein the second display area is bent toward a backlight side of the first display area;

[0018] forming a functional layer on the first display area and the second display area;

[0019] Providing a cover plate, wherein the cover plate is arranged on a side of the functional layer facing away from the flexible display panel;

[0020] Providing a closed structure, wherein one end of the closed structure is connected to a surface of the cover plate close to the flexible display panel, and the other end is connected to the functional layer located above the second display area, so as to form a sealed receiving cavity between the closed structure, the cover plate, and the functional layer;

[0021] The accommodating cavity is filled with a first gas, wherein the refractive index of the first gas is less than 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the bent film structure of the display area of ​​the display module in the related art;

[0023] Figure 2 Schematic diagram of the film structure of the display module according to an embodiment of the present application;

[0024] Figure 3 Schematic diagram of the film structure of the flexible display panel according to an embodiment of the present application;

[0025] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at P in the middle;

[0026] Figure 5 This is a schematic diagram of another film layer structure of a display module according to an embodiment of the present application;

[0027] Figure 6 Schematic diagram of the process of manufacturing a display module according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. Furthermore, when a layer is referred to as being "under" another layer, it can be directly below or one or more light-emitting units may be present. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more light-emitting units may be present.

[0031] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0032] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this application.

[0033] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, and is not limited here.

[0034] Furthermore, in the specification, the phrase “planar distribution diagram” refers to a drawing when the target portion is viewed from above, and the phrase “cross-sectional diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0035] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0036] With the development of OLED display technology, people's requirements for display devices are getting higher and higher. In recent years, due to the continuous increase in demand, display devices are required to achieve borderless display to improve the user's visual experience.

[0037] In the related art, a solution of bending the display area of ​​a display panel is adopted to enable the edge of the display panel to display images, thereby enabling the display device to achieve borderless display and further improving the screen-to-body ratio of the display device.

[0038] like Figure 1 The figure shows a schematic diagram of the structure in which the display area of ​​the display module 1 in the related art is bent. The display module 1 includes a flexible display panel 2, a functional layer 3 covering the light-emitting side of the flexible display panel 2, a cover plate 4 arranged on the functional layer 3, and an adhesive layer 5 connecting the cover plate 4 and the functional layer 3. The flexible display panel 2 includes a first display area AA1, a second display area AA2 and a non-display area NA connected to each other. The second display area AA2 is located at the edge of the display module 1. The second display area AA2 has a bending section 6 with a radius of r, so that the non-display area NA is located on the backlight side of the first display area AA1. The light emitted from the upper half of the bending section 6 passes through the functional layer 3, the adhesive layer 5 and the cover plate 4 in sequence and then enters the human eye, so that the edge of the display module 1 can display images, thereby increasing the screen-to-body ratio of the display device.

[0039] However, since the bending section 6 is bent, when the human eye observes from a direction perpendicular to the first display area AA1, the angle between the human eye's line of sight and the light emitted by the pixels in the upper half of the bending section 6 of the second display area AA2 is also large. Figure 1As shown in the figure, the angle between the light L emitted by the pixels in the upper half of the bending section 6 and the line of sight V of the human eye is α, while the angle between the light emitted by the first display area AA1 and the line of sight V of the human eye is 0°. This will cause the brightness and color of the second display area AA2 and the first display area AA1 perceived by the human eye to be uneven, which is specifically manifested as lower brightness in the second display area AA2 and color cast. That is, the bending area of ​​the second display area AA2 of the flexible display panel 2 will experience poor brightness and color cast.

[0040] In response to the above problems, the present application proposes a display module and a manufacturing method thereof, as well as a display device, so as to improve adverse conditions such as reduced brightness and color deviation in the bending area of ​​the flexible display panel, thereby improving the display effect.

[0041] like Figure 2 As shown, an embodiment of the first aspect of the present application provides a display module 100. The display module 100 includes a flexible display panel 110, a functional layer 120, a cover plate 130, and a sealing structure 140. The flexible display panel 110 includes a first display area 110a and a second display area 110b, with the second display area 110b being bent toward the backlight side of the first display area 110a. The functional layer 120 covers the first display area 110a and the second display area 110b. The cover plate 130 is disposed on the side of the functional layer 120 facing away from the flexible display panel 110. One end of the sealing structure 140 is connected to a surface of the cover plate 130 proximal to the flexible display panel 110, and the other end is connected to the functional layer 120 covering the second display area 110b, thereby forming a sealed receiving chamber S between the sealing structure 140, the cover plate 130, and the functional layer 120. The receiving chamber S is filled with a first gas having a refractive index less than 1.

[0042] In this application, the display module 100 includes a flexible display panel 110, a functional layer 120, a cover plate 130 and a sealing structure 140. The flexible display panel 110 refers to a display panel that can be bent. Figure 2 As shown, the flexible display panel 110 has a first display area 110a and a second display area 110b connected to each other. The second display area 110b is bent toward the backlight side of the first display area 110a, so that at least a portion of the second display area 110b is formed into an arc. The bent second display area 110b enables the edge area of ​​the flexible display panel 110 to have a display function, thereby increasing the screen-to-body ratio of the display module 100. The backlight side of the first display area 110a refers to the side that does not emit light.

[0043] It is easy to understand that the number of second display areas 110b can be one, for example, located on one side of the first display area 110a; or, the number of second display areas 110b can be two, for example, located on two opposite sides of the first display area 110a; or, the number of second display areas 110b can also be three or four, and located on different sides of the first display area 110a, so that the edge areas on different sides of the flexible display panel 110 have display functions, thereby helping to further improve the screen-to-body ratio of the display module 100.

[0044] The functional layer 120 is a film layer used to implement other functions of the display module 100, such as touch control and anti-glare. The functional layer 120 covers the first display area 110a and the second display area 110b, forming a portion of the functional layer 120 in an arc shape. The cover plate 130 is disposed on the functional layer 120 to protect the functional layer 120 and the flexible display panel 110, reducing the probability of damage to the functional layer 120 and the flexible display panel 110, thereby improving the service life of the display module 100. In some embodiments, the cover plate 130 may be, for example, transparent glass.

[0045] The present application also includes a sealing structure 140. One end of the sealing structure 140 is connected to a surface of the cover plate 130 near the flexible display panel 110, and the other end is connected to the functional layer 120 located overlying the second display area 110b, thereby forming a sealed receiving cavity S between the sealing structure 140, the cover plate 130, and the functional layer 120. The receiving cavity S is filled with a first gas having a refractive index less than 1.

[0046] In this application, the light emitted from the bent second display area 110b passes through the functional layer 120, the receiving cavity S and the cover plate 130 in sequence and then enters the human eye. Figure 4 As shown, Figure 4 for Figure 2An enlarged schematic diagram of point P in the figure. Light propagation is explained using the light emitted from point G at the bend of the second display area 110b as an example. After light M from point G enters the functional layer 120, due to the different refractive indices of the functional layer 120 and the first gas in the storage chamber S, light M is refracted at the boundary between the functional layer 120 and the storage chamber S. Let the refractive index of the functional layer 120 be n1, and the refractive index of the first gas in the storage chamber S be n2, where n1>1>n2. A normal F is drawn at the intersection of light M and the functional layer 120. The angle between the light and the normal F is the incident angle β1. After emitting, light M forms a refracted light M1. The angle between the refracted light M1 and the normal F is the exit angle β2. According to the relevant theorem of refraction, n1sinβ1=n2sinβ2. Since n1>n2, sinβ1<sinβ2, and β2>β1. In this way, light M entering the accommodating cavity S forms a refracted light M1 that is deflected toward the first display area 110a. Consequently, when the human eye observes from a direction perpendicular to the first display area 110a, the angle between the human eye's line of sight and the refracted light M1, i.e., the viewing angle, is reduced. In other words, after the accommodating cavity S is filled with the first gas with a refractive index less than 1, more light can be refracted through the curved region of the second display area 110b and enter the human eye. This reduces the viewing angle, thereby improving the brightness of the second display area 110b and reducing color shift, thereby enhancing the display quality.

[0047] Furthermore, in the present application, the refractive index of the first gas filled in the accommodating chamber S is less than 1. Generally, the refractive index of air can be approximately regarded as 1, that is, under standard conditions, the refractive index of the first gas is less than that of air. Figure 4 As shown, if the gas in the accommodating chamber S is air, the refractive index of the functional layer 120 is different from that of air. Therefore, when the light from point G passes through the accommodating chamber S, a refracted light M2 is generated. The angle between the refracted light M2 and the normal F is recorded as the exit angle β3. Therefore, n1sinβ1 = 1×sinβ3. In other words, n2sinβ2 = 1×sinβ3. Since n2 < 1, sinβ2 > sinβ3, and β2 > β3. In other words, the angle between the refracted light M1 and the human eye's line of sight is smaller than that of the refracted light M2. In other words, in the present application, the refractive index of the first gas filled in the accommodating chamber S is less than 1, so that the angle of deflection of the light M toward the first display area 110a is larger than when filled with air. As a result, compared with air, the brightness of the second display area 110b and the color cast of the second display area 110b are better improved, thereby further enhancing the display effect.

[0048] like Figure 3As shown, the flexible display panel 110 generally includes a flexible substrate 111, a driving circuit layer 112 located on the flexible substrate 111, and a display layer 113 located on the driving circuit layer 112. The material of the flexible substrate 111 can be a polymer material such as polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR) or glass fiber reinforced plastic (FRP). Preferably, the material of the flexible substrate can be polyimide (PI). Polyimide is an excellent flexible material that enables the flexible display panel 110 to be freely bent at a certain angle.

[0049] The display layer 113 generally includes light-emitting units of various colors electrically connected to the driving circuit layer 112, and the driving circuit layer 112 is used to drive the light-emitting units to emit light. The light-emitting units may include OLED devices, Micro LED devices, Mini LED devices, QLED (Quantum Dots Light Emitting Diode Display) devices, inorganic light-emitting display devices, etc., and this application does not limit them.

[0050] In some embodiments, the flexible display panel 110 further includes an encapsulation layer 114 located on the side of the display layer 113 facing away from the flexible substrate 111. The encapsulation layer 114 can reduce the probability of external water and oxygen corroding the display device in the flexible display panel 110, thereby helping to increase the life of the flexible display panel 110.

[0051] In some embodiments, the first gas includes at least one of carbon monoxide and hydrogen. The refractive index of each of the first gases is less than 1, thereby improving the brightness of the second display area 110b after bending and improving color shift, thereby enhancing the display effect. "At least one" means that the accommodating cavity S can be filled with only carbon monoxide, only hydrogen, or both carbon monoxide and hydrogen, and this application does not impose any restrictions on this.

[0052] like Figure 2 As shown, the second display area 110b includes a curved section 1101 and a straight section 1102. The straight section 1102 bends through the curved section 1101 to the backlight side of the first display area 110a. The functional layer 120 includes a first sub-functional layer 121 covering the first display area 110a, a second sub-functional layer 122 covering the curved section 1101, and a third sub-functional layer 123 covering the straight section 1102. The curved section 1101 is arc-shaped, and the straight section 1102 faces the first display area 110a in the thickness direction of the display module 100. The shape of the functional layer 120 is consistent with that of the flexible display panel 110, which helps improve the adhesion and bending performance between the functional layer 120 and the flexible display panel 110.

[0053] Furthermore, the functional layer 120 includes a polarizer layer 121 . The polarizer layer 121 can block reflection of external light, thereby facilitating improvement of the contrast of the display module 100 .

[0054] Furthermore, in some embodiments, the functional layer 120 may further include a touch layer (not shown) stacked with the polarizer layer 121 . Providing the touch layer can help improve the functionality of the display module 100 .

[0055] In some embodiments, as Figure 5 As shown, the enclosing structure 140 includes a first portion 141 extending along the thickness direction of the display module 100 and a one-way valve 142 disposed on the first portion 141. One end of the first portion 141 is connected to a surface of the cover plate 130 near the flexible display panel 110, and the other end is connected to the outermost edge of the second sub-functional layer 122.

[0056] This embodiment proposes one of the structures of the closed structure 140. Specifically, it includes a first part 141 and a one-way valve 142. The first part 141 is a plate-like structure. The outermost edge of the second sub-functional layer 122 refers to the outermost side of the second sub-functional layer 122 in the direction of the bending section 1101 from the first display area 110a to the second display area 110b. The one-way valve 142 is used to inflate the interior of the accommodating chamber S. When the air pressure reaches a set value, the inflation stops. At this point, the accommodating chamber S is filled with the first gas with a refractive index lower than 1.

[0057] It is easy to understand that the accommodating chamber S originally contains air. After filling, the accommodating chamber S may contain a mixture of air and the first gas. To increase the content of the first gas in the accommodating chamber S, or even convert it entirely into the first gas, the air inside can be gradually converted into the first gas through multiple inflation and deflation cycles, thereby gradually improving the purity of the first gas in the accommodating chamber S.

[0058] In this embodiment, the accommodating cavity S formed by the enclosing structure 140, the protective layer 120, and the cover plate 130 is located on the outermost edge of the second sub-functional layer 122, near the cover plate 130. This side is within the visible range of the human eye, which helps improve the brightness of the second display area 110b and improve the color cast of the second display area 110b, thereby improving the display quality. In this embodiment, the enclosing structure 140 consists only of the first portion 141 and the one-way valve 142, which helps simplify the structure of the enclosing structure 140 and reduce its production cost.

[0059] In other embodiments, Figure 2As shown, the encapsulation structure 140 includes a first portion 141 extending along the thickness direction of the display module 100, a second portion 143 connected to the first portion 141, and a one-way valve 142 disposed on the first portion 141. The second portion 143 extends along the bend section 1101 toward the first display area 110a. The first portion 141 does not contact the outermost edge of the second sub-functional layer 122. The first portion 141 is connected to the side surface of the cover plate 130 near the flexible display panel 110, and the second portion 143 is connected to the third sub-functional layer 123.

[0060] This embodiment proposes another structure of the closed structure 140. Specifically, it includes a first part 141, a second part 143 and a one-way valve 142. The outermost edge of the second sub-functional layer 122 refers to the outermost side of the second sub-functional layer 122 in the direction of the bending section 1101 from the first display area 110a to the second display area 110b. The first part 141 and the second part 143 are connected to form an L-shaped structure. Among them, one end of the first part 141 in the L-shaped structure is connected to the side surface of the cover plate 130 close to the flexible display panel 110, and one end of the second part 143 in the L-shaped structure is connected to the third sub-functional layer 123. The one-way valve 142 is used to inflate the interior of the accommodating cavity S. The first portion 141 does not contact the outermost edge of the second sub-functional layer 122, thereby forming a housing chamber S comprising a first sub-housing chamber S1 located on the outermost edge of the second sub-functional layer 122, close to the cover plate 130, and a second sub-housing chamber S2 located on the outermost edge of the second sub-functional layer 122, close to the third sub-functional layer 123. The first sub-housing chamber S1 and the second sub-housing chamber S2 are connected. A one-way valve 142 is provided on the first portion 141. Thus, air can be inflated into the first sub-housing chamber S1 and the second sub-housing chamber S2 through the one-way valve 142. When the air pressure reaches a set value, inflation stops, thereby filling the housing chamber S with the first gas. It is readily understood that the one-way valve 142 can also be provided on the second portion 143, and this is not a limitation of the present application.

[0061] In this embodiment, the first portion 141 and the second portion 143 of the enclosed structure 140 are connected to form an L-shaped structure. On the one hand, this allows the cover plate 130's orthographic projection in the thickness direction of the display module 100 to cover the enclosed structure 140, preventing the first portion 141 of the enclosed structure 140 from protruding outward, thereby facilitating an increase in the screen-to-body ratio of the display module 100. On the other hand, because the third sub-functional layer 123 covers the straight section 1102 in the second display area 110b, the third sub-functional layer 123 is also flat. Thus, the connection between the second portion 143 and the third sub-functional layer 123 in the L-shaped structure is a plane-to-plane connection, which further facilitates the convenience and stability of the connection between the second portion 143 and the third sub-functional layer 123, thereby improving the reliability of the connection of the enclosed structure 140.

[0062] Furthermore, the first portion 141 can be connected to a surface of the cover plate 130 close to the flexible display panel 110 via sealant, and the second portion 143 can be connected to the third sub-functional layer 123 via sealant, thereby facilitating improving the sealing performance of the accommodating cavity S.

[0063] In some embodiments, the thickness of the first part 141 is 0.2 mm to 0.3 mm. Typically, an ink layer is printed on the edge of the cover plate 130, and the ink layer acts as an edge shading layer, and the width of the ink layer is generally 0.2 mm to 0.3 mm. Therefore, in this embodiment, the thickness of the first part 141 is also set to 0.2 mm to 0.3 mm. In this way, the first part 141 will overlap with the ink layer when connected to the surface of the side of the cover plate 130 close to the flexible display panel 110, thereby not adding any additional frame to the display module 100. In addition, when the thickness of the first part 141 is 0.2 mm to 0.3 mm, its own strength will not be too low, and the bonding surface area when connected to the cover plate 130 is moderate, which is also conducive to improving the reliability of the connection between the first part 141 and the cover plate 130.

[0064] In some embodiments, the thickness of the second portion 143 is 0.2 mm to 0.3 mm. If the second portion 143 is thicker, it increases the thickness of the display module 100, hindering the thinness and lightness of the display module 100. If the second portion 143 is thinner, its inherent strength is lower and it is prone to deformation. Therefore, in this embodiment, the thickness of the second portion 143 is set to 0.2 mm to 0.3 mm, thereby improving the strength of the second portion 143 while ensuring the thinness and lightness of the display module 100. In addition, the thickness range of the second portion 143 is the same as the thickness range of the first portion 141, which also facilitates the manufacturing of the first portion 141 and the second portion 143.

[0065] Furthermore, the material of the first part 141 and the second part 143 can be metal, plastic, etc., which is not limited in this application.

[0066] In some embodiments, the display module 100 further includes a first adhesive layer 150, through which the cover plate 130 is bonded to the functional layer 120. The orthographic projection of the first adhesive layer 150 in the thickness direction of the display module 100 and the orthographic projection of the second display area 110b in the thickness direction of the display module 100 do not overlap. In the present application, the cover plate 130 is bonded to the functional layer 120 via the first adhesive layer 150, thereby improving the stability of the cover plate 130. The first adhesive layer 150 may be an optical adhesive, a pressure-sensitive adhesive, or the like. Furthermore, in this embodiment, the first adhesive layer 150 only covers the first sub-functional layer 121 of the functional layer 120 and does not cover the second sub-functional layer 122. In this way, the light emitted by the bending section 1101 in the second display area 110b will only pass through the second sub-functional layer 122, the accommodating cavity S and the cover plate 130, and will not pass through the first adhesive layer 150, which is beneficial to reduce the light energy loss of the bending section 1101 in the second display area 110b, and further helps to further improve the brightness of the second display area 110b and improve the display effect.

[0067] In some embodiments, as Figure 2 As shown, the display module 100 may further include a back film assembly, a heat dissipation layer 170, and a buffer layer 180. The back film assembly provides support for the flexible display panel 110. For example, the back film assembly may include a first sub-back film 160 and a second sub-back film 190 spaced apart. The partition between the first sub-back film 160 and the second sub-back film 190 is positioned opposite the bending region of the second display area 110b to reduce stress when the second display area 110b is bent.

[0068] The heat dissipation layer 170 can be disposed on the side of the first sub-back film 160 facing away from the flexible display panel 110. The heat dissipation layer 170 can dissipate heat from the flexible display panel 110 to reduce the operating temperature of the flexible display panel 110 and prevent damage to the flexible display panel 110. The buffer layer 180 can be disposed between the heat dissipation layer 170 and the second sub-back film 190 to absorb the impact energy received by the display module 100, preventing the display module 100 from being damaged by vibration or impact, thereby affecting its service life. In addition, the buffer layer 180 can also adjust the bending radius of the second display area 110b to ensure a close fit between the various film layers. In some embodiments, the buffer layer 180 can be made of foam.

[0069] The embodiment of the second aspect of the present application proposes a display device. The display device includes the display module 100 described in the first aspect. The display module 100 is provided with a closed structure 140, and a sealed accommodating chamber S is formed between the closed structure 140, the cover plate 130 and the functional layer 120, and the accommodating chamber S is filled with a first gas. In this way, after the light emitted from the bending area of ​​the second display area 110b enters the accommodating chamber S, it will form a refracted light M1 that is deflected toward the first display area 110a, so that when the human eye observes from a direction perpendicular to the first display area 110a, the angle between the human eye's line of sight and the refracted light M1, that is, the viewing angle, is reduced. In other words, after the accommodating chamber S is filled with the first gas, more light can enter the human eye through the refracted effect in the bending area of ​​the second display area 110b, and the viewing angle of the light is reduced, which is beneficial to improving the brightness of the bending area of ​​the second display area 110b and improving the color deviation of the bending area, thereby improving the display effect.

[0070] The third embodiment of the present application provides a method for manufacturing a display module 100, including:

[0071] A flexible display panel 110 is provided. The flexible display panel 110 includes a first display area 110a and a second display area 110b. The second display area 110b is bent toward the backlight side of the first display area 110a.

[0072] forming a functional layer 120 on the first display area 110 a and the second display area 110 b ;

[0073] Providing a cover plate 130, the cover plate 130 is arranged on a side of the functional layer 120 away from the flexible display panel 110;

[0074] A closed structure 140 is provided, one end of the closed structure 140 is connected to a surface of the cover plate 130 close to the flexible display panel 110, and the other end is connected to the functional layer 120 located overlying the second display area 110b, so as to form a sealed receiving cavity S between the closed structure 140, the cover plate 130, and the functional layer 120;

[0075] The accommodation chamber S is filled with a first gas, wherein the refractive index of the first gas is less than 1.

[0076] The display module 100 manufactured by the manufacturing method of the display module 100 of the present application is provided with a closed structure 140. A closed accommodating cavity S is formed between the closed structure 140, the cover plate 130 and the functional layer 120, and the accommodating cavity S is filled with a first gas. In this way, the light emitted from the bending area of ​​the second display area 110b will form a refracted light M1 deflected toward the first display area 110a after entering the accommodating cavity S, so that when the human eye observes from a direction perpendicular to the first display area 110a, the angle between the human eye's line of sight and the refracted light M1, that is, the viewing angle, is reduced. In other words, after the accommodating cavity S is filled with the first gas, more light can enter the human eye through the refraction of the bending area of ​​the second display area 110b, and the viewing angle of the light is reduced, which is beneficial to improving the brightness of the bending area of ​​the second display area 110b and improving color deviation, thereby improving the display effect.

[0077] Among them, forming the functional layer 120 and the cover plate 130 is a conventional technical means in this field, and this application will not elaborate on this. The closed structure 140 can be connected to the cover plate 130 and the functional layer 120 respectively through a sealant, which is beneficial to improving the sealing performance of the accommodating cavity S. The process of filling the accommodating cavity S with the first gas is specifically: inflating the accommodating cavity S through the closed structure 140, and stopping the inflation when the air pressure reaches the set value. Since there is air in the accommodating cavity S originally, the air in the accommodating cavity S can be gradually converted into the first gas by multiple inflation and deflation, thereby gradually improving the purity of the first gas in the accommodating cavity S.

[0078] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A display module, characterized in that: include: A flexible display panel, comprising a first display area and a second display area, wherein the second display area is bent toward a backlight side of the first display area; a functional layer, wherein the functional layer covers the first display area and the second display area; a cover plate, the cover plate being arranged on a side of the functional layer facing away from the flexible display panel; and A closed structure, one end of the closed structure is connected to the surface of the cover plate close to the flexible display panel, and the other end is connected to the functional layer located at the second display area, so as to form a closed accommodating cavity between the closed structure, the cover plate and the functional layer, wherein the accommodating cavity is filled with a first gas, and the refractive index of the first gas is less than 1.

2. The display module according to claim 1, wherein: The first gas includes at least one of carbon monoxide and hydrogen.

3. The display module according to claim 1, wherein: The second display area includes a bent section and a straight section, and the straight section is bent to the backlight side of the first display area through the bent section; The functional layer includes a first sub-functional layer covering the first display area, a second sub-functional layer covering the bent segment, and a third sub-functional layer covering the straight segment.

4. The display module according to claim 3, wherein: The closed structure includes a first part extending along the thickness direction of the display module and a one-way valve arranged on the first part, one end of the first part is connected to the side surface of the cover plate close to the flexible display panel, and the other end is connected to the outermost edge of the second sub-functional layer.

5. The display module according to claim 3, wherein: The enclosing structure includes a first portion extending along the thickness direction of the display module, a second portion connected to the first portion, and a one-way valve provided on the first portion, wherein the second portion extends along the bending section toward the first display area; The first portion does not contact the outermost edge of the second sub-functional layer, the first portion is connected to a surface of the cover plate close to the flexible display panel, and the second portion is connected to the third sub-functional layer.

6. The display module according to claim 5, wherein: The thickness of the first part is 0.2mm to 0.3mm; And / or, the thickness of the second portion is 0.2 mm to 0.3 mm.

7. The display module according to claim 1, wherein: The display module further includes a first adhesive layer, the cover plate is bonded to the functional layer via the first adhesive layer, and there is no overlap between the orthographic projection of the first adhesive layer in the thickness direction of the display module and the orthographic projection of the second display area in the thickness direction of the display module.

8. The display module according to claim 1, wherein: The functional layer includes a polarizer layer.

9. A display device, characterized in that: A display module comprising any one of claims 1-8.

10. A method for manufacturing a display module, characterized in that: include: Providing a flexible display panel, the flexible display panel comprising a first display area and a second display area, wherein the second display area is bent toward a backlight side of the first display area; forming a functional layer on the first display area and the second display area; Providing a cover plate, wherein the cover plate is arranged on a side of the functional layer facing away from the flexible display panel; Providing a closed structure, wherein one end of the closed structure is connected to a surface of the cover plate close to the flexible display panel, and the other end is connected to the functional layer located above the second display area, so as to form a sealed receiving cavity between the closed structure, the cover plate, and the functional layer; The accommodating cavity is filled with a first gas, wherein the refractive index of the first gas is less than 1.

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