Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a display panel, the display panel comprises a main body part, a first part, a second part and a bending part connected in sequence, the first support film comprises a first support subpart and a second support subpart, the first support subpart is located on the side of the main body part and the first part facing the second part and comprises a first end close to the bending part, and the second support subpart is located on the side of the second part facing the first part and comprises a second end close to the bending part; the second support film comprises a third support subpart and a fourth support subpart, the third support subpart is located on the side of the first end facing the second end, and the fourth support subpart is located on the side of the second end facing the first end. The display module provided by the application can provide additional support during the bending process, ensure that the bending part after bending forms a smoother appearance, and prevent internal wiring of the display panel from being broken due to bending stress concentration.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display module and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, current display modules are prone to display problems. Summary of the Invention

[0004] In view of this, this application provides a display module and a display device that help avoid broken internal wiring of the display panel and improve display quality.

[0005] In a first aspect, this application provides a display module, which includes:

[0006] The display panel includes a main body and a binding part. The binding part includes a first part, a second part and a bent part. The first part and the second part are disposed opposite to each other in the thickness direction of the display panel. The bent part connects the first part and the second part. The first part is connected to the main body.

[0007] A first support membrane includes a first support sub-part and a second support sub-part. The first support sub-part is located on the side of the main body and the first part facing the second part and includes a first end near the bent portion. The second support sub-part is located on the side of the second part facing the first part and includes a second end near the bent portion.

[0008] The second support membrane includes a third support sub-part and a fourth support sub-part, wherein the third support sub-part is located on the side of the first end facing the second end, and the fourth support sub-part is located on the side of the second end facing the first end.

[0009] According to an embodiment of the first aspect of this application, the side of the third support sub-part facing the second end contacts the side of the fourth support sub-part facing the first end.

[0010] According to an embodiment of the first aspect of this application, the display module further includes:

[0011] The shim is located on the side of the first support sub-part facing the second support sub-part and on the side of the third support sub-part away from the bent portion;

[0012] The composite tape is located on the side of the second support sub-part facing the first support sub-part and on the side of the fourth support sub-part away from the bent portion.

[0013] According to an embodiment of the first aspect of this application, the sum of the thicknesses of the third support sub-part and the fourth support sub-part in the thickness direction is not less than the sum of the thicknesses of the shim block and the composite tape in the thickness direction.

[0014] Preferably, the sum of the thicknesses of the third support sub-part and the fourth support sub-part in the thickness direction is equal to the sum of the thicknesses of the shim block and the composite tape in the thickness direction.

[0015] According to an embodiment of the first aspect of this application, the main body and the first part are arranged in a first direction parallel to the display panel, the width of the third support sub-part in the first direction is smaller than the width of the first support sub-part in the first direction, and the width of the fourth support sub-part in the first direction is smaller than the width of the second support sub-part in the first direction.

[0016] Preferably, the orthographic projection of the third support sub-part on the display panel is located within the orthographic projection of the first support sub-part on the display panel; the orthographic projection of the fourth support sub-part on the display panel is located within the orthographic projection of the second support sub-part on the display panel.

[0017] According to an embodiment of the first aspect of this application, the cross-sectional shape of the bent portion is an arc shape;

[0018] The sum of the thicknesses of the first support sub-part, the second support sub-part, the third support sub-part, and the fourth support sub-part in the thickness direction is not less than the diameter of the bent portion;

[0019] Preferably, the thickness of the first support sub-part, the second support sub-part, the third support sub-part, and the fourth support sub-part in the thickness direction is half the radius of the bent portion.

[0020] According to an embodiment of the first aspect of this application, the first support membrane includes a groove located between the first support sub-part and the second support sub-part, and located on the side of the bent portion facing the second support membrane;

[0021] Preferably, the slot extends through the first support membrane to form the first support sub-part and the second support sub-part.

[0022] According to an embodiment of the first aspect of this application, the display module further includes:

[0023] A protective layer, at least a portion of which is located in the bent portion, is disposed on the side of the display panel opposite to the first support film.

[0024] According to an embodiment of the first aspect of this application, the display module further includes:

[0025] A polarizer is located on the light-emitting side of the display panel;

[0026] A cover plate is located on the side of the polarizer facing away from the display panel;

[0027] Preferably, the display module further includes an optical adhesive layer located between the polarizer and the cover plate.

[0028] On the other hand, embodiments of this application also provide a display device, which includes the display module described above.

[0029] Compared with the prior art, the display module provided in this application adds a second support film. The third and fourth support sub-parts of the second support film are located between the first and second support sub-parts and are positioned close to the bending portion. During the bending process, the second support film can provide additional support to the easily collapsed areas, effectively improving the stress distribution in the bending area and ensuring that the bent portion forms a smoother shape. This prevents the internal wiring of the display panel from breaking due to stress concentration during bending, thereby ensuring normal display function and improving the reliability and stability of the display module during bending operations. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a display module provided in one embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of the display panel in the display module when it is unfolded, according to another embodiment of this application.

[0033] Figure 3 This is a cross-sectional view of the display panel in a display module provided in another embodiment of this application when the display panel is unfolded.

[0034] Figure 4 This is a schematic diagram of the structure of a display module provided in another embodiment of this application.

[0035] Marker explanation:

[0036] 100. Display module; 10. Display panel; 101. Main body; 102. First part; 103. Bending part; 104. Second part; 211. First end; 221. Second end; 2. First support film; 21. First support sub-part; 22. Second support sub-part; 3. Second support film; 31. Third support sub-part; 32. Fourth support sub-part; 4. Pad block; 5. Composite tape; 6. Protective layer; 7. Polarizing film; 8. Optical adhesive layer; 9. Cover plate. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] Currently, flexible mobile phone projects pursue narrow bezel designs, and the bottom edge almost entirely adopts a bending structure. That is, the bonding part of the display panel is bent to the back to reduce the bottom bezel. To improve bending performance, the support film in the bending area is grooved, thus forming a two-section structure.

[0040] Through research conducted by the inventors of this application, it was discovered that, due to the composite tape structure on the back of the display panel, in order to ensure that the composite tape does not extend beyond the display panel after being applied, it is currently necessary to design the composite tape to be recessed. When the bent display panel is attached to the padding block and the composite tape, the bending stress is relatively large in the bending area because the two sections of the support film have a gap in the thickness direction. This often causes sharp corners to appear in the shape of the bending area. In particular, the internal wiring of the display panel is more likely to be bent and broken at the sharp corners of the arc, which can easily cause functional display defects.

[0041] Based on this, this application provides a display module solution that, by adding a support film structure, can provide support at the original collapsed location, thereby maintaining a smooth transition shape in the bending area and preventing breakage of the internal wiring of the display panel. See the following embodiments for details.

[0042] To better understand this application, the display module and display device of the present application embodiments are described in detail below with reference to the accompanying drawings. It should be noted that the Z direction in the drawings is the thickness direction of the display panel, and the X direction is the first direction. In the drawings, for ease of drawing, the dimensions in the drawings are not necessarily proportional to the actual dimensions, and some hierarchical structures in the display panel are not shown.

[0043] like Figure 1 As shown, one embodiment of this application provides a display module 100, which includes a display panel 10, a first support film 2, and a second support film 3.

[0044] The display panel 10 includes a main body 101 and a bonding portion. The bonding portion includes a first part 102, a second part 104, and a bent part 103. The first part 102 and the second part 104 are arranged opposite each other in the thickness direction (Z direction in the figure) of the display panel 10. The bent part 103 connects the first part 102 and the second part 104. The first part 102 is connected to the main body 101. The main body 101 and the first part 102 are arranged along a first direction (X direction in the figure), which is parallel to the plane where the main body 101 of the display panel 10 is located.

[0045] The first support membrane 2 includes a first support sub-part 21 and a second support sub-part 22. The first support sub-part 21 is located on the side of the main body 101 and the first part 102 facing the second part 104, and the first support sub-part 21 includes a first end 211 near the bent part 103. The second support sub-part 22 is located on the side of the second part 104 facing the first part 102, and the second support sub-part 22 includes a second end 221 near the bent part 103.

[0046] The second support membrane 3 includes a third support sub-part 31 and a fourth support sub-part 32. The third support sub-part 31 is located on the side of the first end 211 facing the second end 221, and the fourth support sub-part 32 is located on the side of the second end 221 facing the first end 211.

[0047] Optionally, the main body 101 includes a plurality of light-emitting elements arranged in an array. The bonding portion may include an IC chip and a flexible circuit board.

[0048] In addition, such as Figure 2 , Figure 3 As shown, before bending the bonding portion of the display panel 10, the display panel 10 is in an unfolded state. The first support sub-parts 21 and 22 of the first support film 2 are spaced apart along a first direction, and the third support sub-parts 31 and 32 are also spaced apart along the first direction. During the bending process of the display panel 10, the first support film 2 provides basic support. The positional design of the first support sub-parts 21 and 22 helps to disperse bending stress, ensuring the structural integrity of the display panel 10 during the bending operation and preventing damage due to excessive local stress.

[0049] The display module 100 provided in this embodiment adds a second support film 3, so that the third support sub-part 31 and the fourth support sub-part 32 are located between the first support sub-part 21 and the second support sub-part 22, and the third support sub-part 31 and the fourth support sub-part 32 are set close to the bending portion 103. During the bending process, the second support film 3 can provide additional support for the position that is prone to collapse, effectively improve the stress distribution in the bending area, and ensure that the bending portion 103 forms a smoother shape after bending. This can prevent the internal wiring of the display panel 10 from breaking due to bending stress concentration, thereby ensuring the normal display function.

[0050] In some alternative embodiments, the side of the third support sub-part 31 facing the second end 221 contacts the side of the fourth support sub-part 32 facing the first end 211.

[0051] After bending, the gap between the first support sub-part 21 and the second support sub-part 22 in the thickness direction can be filled by the third support sub-part 31 and the fourth support sub-part 32. The close contact design of the third support sub-part 31 and the fourth support sub-part 32 enhances the integrity and stability of the first support membrane 2 and the second support membrane 3 in the bending area, making the stress transmission more uniform and further ensuring the bending effect.

[0052] In some alternative embodiments, the display module 100 also includes a shim block 4 and a composite tape 5.

[0053] The shim block 4 is located on the side of the first support sub-part 21 facing the second support sub-part 22, and the shim block 4 is also located on the side of the third support sub-part 31 away from the bending portion 103. The composite tape 5 is located on the side of the second support sub-part 22 facing the first support sub-part 21, and the composite tape 5 is also located on the side of the fourth support sub-part 32 away from the bending portion 103.

[0054] Among them, the shim block 4 and the composite tape 5 play an auxiliary support and fixation role, ensuring a tight fit and stable connection between the first part 102 and the second part 104. At the same time, they work with other structural components to cope with stress changes during bending and maintain the mechanical balance of the overall structure.

[0055] In some optional embodiments, the sum of the thicknesses of the third support sub-part 31 and the fourth support sub-part 32 in the thickness direction is not less than the sum of the thicknesses of the shim block 4 and the composite tape 5 in the thickness direction.

[0056] Optionally, the sum of the thicknesses of the third support sub-part 31 and the fourth support sub-part 32 in the thickness direction is equal to the sum of the thicknesses of the shim block 4 and the composite tape 5 in the thickness direction.

[0057] By setting the third support sub-part 31 and the fourth support sub-part 32 with sufficient thickness, the newly added second support membrane 3 is guaranteed to play a dominant role in the support structure, ensuring that it can effectively bear bending stress and maintain the stability and reliability of the structure.

[0058] In some alternative embodiments, such as Figure 1 As shown, the main body 101 and the first part 102 are arranged in a first direction parallel to the display panel 10. The width of the third support sub-part 31 in the first direction is smaller than the width of the first support sub-part 21 in the first direction, and the width of the fourth support sub-part 32 in the first direction is smaller than the width of the second support sub-part 22 in the first direction.

[0059] Preferably, the orthographic projection of the third support sub-part 31 on the display panel 10 is located within the orthographic projection of the first support sub-part 21 on the display panel 10. The orthographic projection of the fourth support sub-part 32 on the display panel 10 is located within the orthographic projection of the second support sub-part 22 on the display panel 10.

[0060] Among them, the third support sub-part 31 and the fourth support sub-part 32 compensate for the inward shrinkage of the composite tape 5. At the same time, the edges of the third support sub-part 31 and the fourth support sub-part 32 do not exceed the corresponding first support sub-part 21 and second support sub-part 22. This compensates for the inward shrinkage of the composite tape 5 and avoids material waste, making the support film structure more compact and reasonable, improving the space utilization of the overall structure, and optimizing the internal layout of the display module 100 while meeting the support function requirements.

[0061] In some alternative embodiments, the cross-sectional shape of the bent portion 103 is an arc shape, or the cross-sectional shape of the bent portion 103 may also be an elliptical arc shape.

[0062] like Figure 1 As shown, taking the cross-section of the bent portion 103 as an example where the cross-section is an arc, the radius of the arc is the bending radius R of the bent portion 103.

[0063] The sum of the thicknesses of the first support sub-part 21, the second support sub-part 22, the third support sub-part 31, and the fourth support sub-part 32 in the thickness direction is not less than the diameter of the bent portion 103, that is, the sum of the thicknesses of the first support sub-part 21, the second support sub-part 22, the third support sub-part 31, and the fourth support sub-part 32 is greater than or equal to 2R.

[0064] Optionally, the first support sub-part 21, the second support sub-part 22, the third support sub-part 31, and the fourth support sub-part 32 have the same thickness, which is half the radius of the bent portion 103, that is, the thickness of the first support sub-part 21, the second support sub-part 22, the third support sub-part 31, and the fourth support sub-part 32 is 1 / 2R.

[0065] In some alternative embodiments, the first support membrane 2 includes a slot located between the first support sub-part 21 and the second support sub-part 22, and the slot is located on the side of the bent portion 103 facing the second support membrane 3.

[0066] Optionally, the slot extends through the first support membrane 2, thereby forming a first support sub-part 21 and a second support sub-part 22. Additionally, a third support sub-part 31 and a fourth support sub-part 32 are also located on either side of the slot.

[0067] The width of the slot can be approximately equal to the arc length of the arc formed by the inner surface of the bent portion 103. The orthographic projection of the slot on the display panel 10 is at least located on the bent portion 103.

[0068] In some alternative embodiments, such as Figure 4 As shown, the display module 100 also includes a protective layer 6, at least a portion of which is located on the bent portion 103. The protective layer 6 is disposed on the side of the display panel 10 opposite to the first support film 2.

[0069] The protective layer 6 covers the bent portion 103 and extends from the bent portion 103 to the second portion 104. The protective layer 6 is a bend protection layer (BPL), formed by applying a protective liquid to the bent portion 103 and allowing it to harden. The protective layer 6 is waterproof, acid-resistant, and alkali-resistant. Furthermore, the protective layer 6 effectively disperses stress during the bending process of the display panel 10, preventing damage to the bent portion 103 due to bending.

[0070] In some alternative embodiments, such as Figure 4 As shown, the display module 100 also includes a polarizer 7 and a cover plate 9, wherein the polarizer 7 is located on the light-emitting side of the display panel 10, and the cover plate 9 is located on the side of the polarizer 7 opposite to the display panel 10.

[0071] Among them, the polarizer 7 precisely controls the polarization direction of light and works in conjunction with liquid crystal molecules to achieve fine adjustment of light transmission and obstruction, thereby clearly presenting images and significantly improving screen contrast, making image details and color levels more distinct. The cover plate 9 is located on the outermost layer, which can protect the internal film structure, prevent the intrusion of dust, moisture, etc., and also has good optical performance, optimizes light transmission effect, and improves display quality.

[0072] Preferably, the display module 100 further includes an optical adhesive layer 8, which is located between the polarizer 7 and the cover plate 9. The optical adhesive layer 8 has the function of bonding and adhesion, and has high optical transparency to ensure smooth light transmission. At the same time, the optical adhesive layer 8 can also play a role in buffering and shock absorption, stabilizing the relative positions of the components, and ensuring the optical performance and structural stability of the display module 100.

[0073] Another embodiment of this application provides a display device, which includes the display module 100 in the above embodiments. The display device includes, but is not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0074] In this embodiment, the display module 100 of the display device adds a second support film 3, so that the third support sub-part 31 and the fourth support sub-part 32 are located between the first support sub-part 21 and the second support sub-part 22, and the third support sub-part 31 and the fourth support sub-part 32 are set close to the bending portion 103. During the bending process, the second support film 3 can provide additional support for the position that is prone to collapse, effectively improve the stress distribution in the bending area, and ensure that the bending portion 103 forms a smoother shape after bending. This can prevent the internal wiring of the display panel 10 from breaking due to bending stress concentration, thereby ensuring the normal display function.

[0075] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0076] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0077] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display module, characterized in that, include: The display panel includes a main body and a binding part. The binding part includes a first part, a second part and a bent part. The first part and the second part are disposed opposite to each other in the thickness direction of the display panel. The bent part connects the first part and the second part. The first part is connected to the main body. A first support membrane includes a first support sub-part and a second support sub-part. The first support sub-part is located on the side of the main body and the first part facing the second part and includes a first end near the bent portion. The second support sub-part is located on the side of the second part facing the first part and includes a second end near the bent portion. The second support membrane includes a third support sub-part and a fourth support sub-part, wherein the third support sub-part is located on the side of the first end facing the second end, and the fourth support sub-part is located on the side of the second end facing the first end.

2. The display module as described in claim 1, characterized in that, The side of the third support sub-part facing the second end contacts the side of the fourth support sub-part facing the first end.

3. The display module as described in claim 1, characterized in that, The display module also includes: The shim is located on the side of the first support sub-part facing the second support sub-part and on the side of the third support sub-part away from the bent portion; The composite tape is located on the side of the second support sub-part facing the first support sub-part and on the side of the fourth support sub-part away from the bent portion.

4. The display module as described in claim 3, characterized in that, The sum of the thicknesses of the third support sub-part and the fourth support sub-part in the thickness direction is not less than the sum of the thicknesses of the shim block and the composite tape in the thickness direction; Preferably, the sum of the thicknesses of the third support sub-part and the fourth support sub-part in the thickness direction is equal to the sum of the thicknesses of the shim block and the composite tape in the thickness direction.

5. The display module as described in claim 1, characterized in that, The main body and the first part are arranged in a first direction parallel to the display panel. The width of the third support sub-part in the first direction is smaller than the width of the first support sub-part in the first direction, and the width of the fourth support sub-part in the first direction is smaller than the width of the second support sub-part in the first direction. Preferably, the orthographic projection of the third support sub-part on the display panel is located within the orthographic projection of the first support sub-part on the display panel; The orthographic projection of the fourth support sub-part on the display panel is located within the orthographic projection of the second support sub-part on the display panel.

6. The display module as described in claim 1, characterized in that, The cross-sectional shape of the bent portion is an arc shape; The sum of the thicknesses of the first support sub-part, the second support sub-part, the third support sub-part, and the fourth support sub-part in the thickness direction is not less than the diameter of the bent portion; Preferably, the thickness of the first support sub-part, the second support sub-part, the third support sub-part, and the fourth support sub-part in the thickness direction is half the radius of the bent portion.

7. The display module as described in claim 1, characterized in that, The first support membrane includes a slot located between the first support sub-part and the second support sub-part, and located on the side of the bent portion facing the second support membrane; Preferably, the slot extends through the first support membrane to form the first support sub-part and the second support sub-part.

8. The display module as described in claim 1, characterized in that, The display module also includes: A protective layer, at least a portion of which is located in the bent portion, is disposed on the side of the display panel opposite to the first support film.

9. The display module as described in claim 1, characterized in that, The display module also includes: A polarizer is located on the light-emitting side of the display panel; A cover plate is located on the side of the polarizer facing away from the display panel; Preferably, the display module further includes an optical adhesive layer located between the polarizer and the cover plate.

10. A display device, characterized in that, The display device includes the display module as described in any one of claims 1-9.

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