Black glue structure and display module

Abstract

The invention relates to the technical field of liquid crystal display screens, and discloses a black glue structure and a display module. The black-black rubber structure is divided into at least two rubber sections in the length direction of the black-black rubber structure, and every two adjacent rubber sections are connected through a plurality of elastic connecting parts. Each of the at least two adhesive sections is provided with a first adhesive surface for attaching a lower polaroid of the display panel and a second adhesive surface for attaching a backlight module; in the first type of pasting surfaces and the second type of pasting surfaces of all the glue sections, first viscosity grade pasting surfaces and second viscosity grade pasting surfaces are alternately distributed in the length direction of the black-black glue structure, and the viscosity of the first viscosity grade is different from that of the second viscosity grade. By means of the collaborative design of diagonal differential viscosity, when the backlight module and the display panel move reversely, the elastic connecting part is stretched to form an isolation net shape, an isolation barrier can be formed to prevent tiny foreign matter from entering the backlight module, the tiny foreign matter in a screen bin is prevented from directly entering the backlight module, and therefore the display effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and in particular to a black-and-white adhesive structure and display module. Background Technology

[0002] With the continuous development of liquid crystal display technology, LCD modules have been widely used in various electronic devices. The bonding reliability between the backlight module and the display panel directly affects the user experience and lifespan of the product. Currently, the industry commonly uses integrated double-sided black adhesive to bond the backlight module between the lower polarizer and the display panel. While this structure can meet basic bonding requirements in conventional applications, it has significant drawbacks in practical applications:

[0003] In harsh reliability tests (such as repeated tumbling tests from a height of 1 meter) or external impact scenarios, the front shell of the device is relatively weak in impact resistance, easily deforming and causing the backlight module and display panel to be pulled in opposite directions, resulting in the instantaneous detachment of the integrated black adhesive. Once detachment occurs, tiny foreign objects from inside the screen compartment can directly enter the backlight module, forming small black spots, severely affecting the user's frontal visual experience. Therefore, improvements to the existing technology are necessary. Summary of the Invention

[0004] This invention provides a black vinyl structure and display module to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A black adhesive structure is used to adhere between a backlight module and a lower polarizer of a display panel. The black adhesive structure is divided into at least two adhesive segments along its length, and adjacent adhesive segments are connected by multiple elastic connecting parts.

[0007] Each of the at least two adhesive segments has a first type of adhesive surface for attaching the polarizer under the display panel and a second type of adhesive surface for attaching the backlight module.

[0008] Among all adhesive surfaces of the same category, the first and second adhesive grades are alternately distributed along the length of the black adhesive structure, and the first and second adhesive grades have different adhesive properties.

[0009] Optionally, the black adhesive structure is divided into a first adhesive segment and a second adhesive segment along its length, and a serrated cut is provided at the junction between the first adhesive segment and the second adhesive segment.

[0010] Optionally, the extension direction of the serrated cut forms an angle of 30°-60° with the length direction of the first and second adhesive segments.

[0011] Optionally, the plurality of elastic connecting portions are evenly spaced along the connection direction between the first adhesive segment and the second adhesive segment.

[0012] Optionally, the width of each of the elastic connecting portions is smaller than the widths of the first adhesive segment and the second adhesive segment.

[0013] Optionally, the elastic modulus of the elastic connection is lower than the elastic modulus of the main materials of the first and second adhesive segments.

[0014] Optionally, when the backlight module and the display panel are relatively displaced, the plurality of elastic connecting parts are stretched and form an isolation barrier erected along the gap between the backlight module and the display panel.

[0015] Optionally, the first adhesive segment and the second adhesive segment are continuously arranged in the edge bonding area between the backlight module and the display panel, and extend circumferentially along the edge bonding area.

[0016] Optionally, the peel force ratio of the first tack grade to the second tack grade is 3:1 to 15:1.

[0017] The present invention also provides a display module, including a display panel, a backlight module, a lower polarizer disposed on one side of the display panel, and a black adhesive structure disposed between the lower polarizer and the backlight module, wherein the black adhesive structure is the black adhesive structure as described in any of the preceding claims.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a black adhesive structure and display module. By dividing the black adhesive into at least two segments, each segment is connected by an elastic connecting part, and adjacent adhesive segments have a cooperative design with diagonally differentiated adhesiveness. Thus, when an external force causes the backlight module and the display panel to shift in opposite directions, the elastic connecting part is stretched to form an isolation mesh, which can form an effective isolation barrier to prevent small foreign objects from entering the backlight module. This effectively prevents small foreign objects in the screen compartment from directly entering the backlight module, thereby ensuring the display effect.

[0020] The present invention has other features and advantages, which will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a display module;

[0023] Figure 2 This is a schematic diagram of a black glue structure provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a black glue structure in another state provided by an embodiment of the present invention.

[0025] Reference numerals: 11, display panel; 12, lower polarizer; 13, black adhesive; 131, first adhesive segment; 132, second adhesive segment; 133, elastic connector; 14, backlight module. Detailed Implementation

[0026] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0027] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0028] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0029] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0030] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0031] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not preclude the presence of additional elements in a process, method, or product that includes the included elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such process, method, or product.

[0032] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0033] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0035] Please refer to Figure 1 , Figure 1 The diagram shows the cross-sectional structure of the edge area of ​​the display module, which, from top to bottom, consists of a display panel 11, a lower polarizer 12, a black adhesive layer 13, and a backlight module 14. The display panel 11 is the core component for image display, with the lower polarizer 12 for light polarization attached to its lower surface. The black adhesive layer 13 serves as an adhesive layer between the lower polarizer 12 and the backlight module 14. The bottommost backlight module 14 is the light source provider for the display panel 11, and its edge area is securely connected to the lower polarizer 12 via the black adhesive layer 13.

[0036] The present invention aims to provide a structural improvement scheme for the black adhesive 13 to solve the problem that when the integral black adhesive 13 in the prior art experiences instantaneous detachment, tiny foreign objects in the screen compartment can directly enter the backlight module 14, forming small black dots, which seriously affects the user's front visual experience.

[0037] Please refer to Figure 2 This invention provides a black adhesive 13 structure for bonding between a backlight module 14 and a lower polarizer 12 of a display panel 11. By placing the black adhesive 13 structure between the lower polarizer 12 of the display panel 11 and the backlight module 14, an adhesion interface is formed between the two. The black adhesive 13 structure is divided into at least two individual adhesive segments along its length, and these segments are not completely disconnected but are interconnected through several elastic connecting parts 133. Because the adhesive segments are divided, when the backlight module 14 and the display panel 11 are subjected to external force causing relative displacement, the overall structure can generate localized responses, thereby avoiding large-area synchronous peeling.

[0038] In this embodiment, each of the at least two adhesive segments has a first type of adhesive surface for attaching the lower polarizer 12 of the display panel 11 and a second type of adhesive surface for attaching the backlight module 14.

[0039] Furthermore, in all adhesive surfaces of the same category, the first and second adhesive grades are alternately distributed along the length of the black adhesive 13 structure, and the first and second adhesive grades have different adhesive properties.

[0040] That is, along the extension direction of the black adhesive 13, the adhesive surfaces of the first adhesive grade and the second adhesive grade are alternately distributed.

[0041] By using the aforementioned setup and the staggered distribution of viscosity gradients, the monomer segments have different following paths when subjected to force in different directions. This results in the lower viscosity adhesive surfaces being preferentially separated when a peeling force is applied, while the higher viscosity surfaces remain adhered. This creates a stable and controllable peeling state, thereby reducing irreversible viscosity decay and inhibiting foreign matter from entering the backlight area along the peeling seam.

[0042] Furthermore, in one embodiment, the black adhesive 13 can be specifically divided into a first adhesive segment 131 and a second adhesive segment 132 along its length, and a serrated cut is formed at the junction of the two segments.

[0043] Understandably, the serrated cut provides a higher stress dispersion capability compared to a straight cut, allowing the two adhesive segments to absorb deformation through the staggered toothed boundaries during stretching. This structure effectively prevents overall breakage when external force is concentrated in a certain area, thus ensuring the structural continuity of the central elastic connection 133. The serrated cut also facilitates the creation of a clear starting direction at the beginning of peeling, making the peeling behavior more controllable and contributing to the stable adhesion of the high-tack side.

[0044] In one alternative embodiment, the extension direction of the serrated cut can form an angle of 30° to 60° with the length direction of the rubber segment.

[0045] Generally, a small angle cut off from the longitudinal direction can improve tear resistance, while a large deviation will reduce the flexibility along the length direction. In this embodiment, by controlling the angle within the range of 30° to 60°, it is possible to obtain both good resistance to crack propagation and appropriate flexibility, so that the black adhesive 13 maintains its structural integrity when subjected to bending or lateral impact.

[0046] In one optional embodiment, multiple elastic connecting portions 133 are evenly spaced along the connection direction between the first adhesive segment 131 and the second adhesive segment 132. This even spacing allows the elastic connecting portions 133 to function as opening, rebounding, and maintaining overall continuity between the adhesive segments. This enables the adhesive segments to form a flexible mesh-like structure under external force, allowing the entire black adhesive 13 to unfold more smoothly after being subjected to force, thus facilitating the formation of a complete foreign object isolation barrier. Uneven distribution can lead to localized strain concentration, causing tearing or breakage.

[0047] In one alternative embodiment, the width of each elastic connection 133 may be less than the main width of the first adhesive segment 131 or the second adhesive segment 132.

[0048] Understandably, a narrower connector means greater flexibility and deformation capacity, making it easier to stretch and form an upright structure under the same external force. Furthermore, a narrower connector reduces its area as a fixed surface while maintaining connectivity, preventing interference with the independent bonding characteristics of the two adhesive segments and thus maintaining their ability to move independently along different bonding surfaces.

[0049] In one alternative embodiment, the elastic connector 133 is made of a flexible material with a lower elastic modulus than the main body material of the adhesive segment. This is because the lower elastic modulus ensures that the elastic connector 133 can preferentially bear force and generate sufficient elongation during the peeling process, allowing it to stand upright between the backlight module 14 and the display panel 11 after being pulled apart, forming a temporary insulating surface. At this time, the main body of the adhesive segment remains stably bonded, thereby maintaining the integrity and sealing of the structure and achieving the function of blocking foreign objects.

[0050] With the cooperation of the above-mentioned structures, when the backlight module 14 and the display panel 11 experience relative displacement due to external impact, structural deformation, or drop, multiple elastic connecting parts 133 will be stretched and gradually erected, forming a three-dimensional isolation barrier distributed between the two adhesive segments. This barrier is equivalent to a temporary grid wall made of elastic material, effectively restricting external microparticles from entering the backlight layer through the peeling gaps.

[0051] To ensure that the above structure can continuously form a sealing ring on the actual whole machine, the first adhesive segment 131 and the second adhesive segment 132 are continuously arranged in the edge bonding area of ​​the backlight module 14 and the display panel 11, and extend along its circumference.

[0052] Based on this, by distributing along the entire edge, it is possible to ensure that the black glue 13 can produce a stable segmented peeling response and isolation function during deformation in any direction, thus avoiding the entry path of foreign objects due to local uncovered areas.

[0053] Furthermore, in this embodiment, the peel force ratio between the first tack grade and the second tack grade can be set to 3:1 to 15:1. This ratio range is derived by taking into account the magnitude of impact forces in different directions during reliability testing, the tape tack decay curve, and the deformation range that the display module can withstand.

[0054] Understandably, if the difference in tack is too small, it cannot be guaranteed that peeling will always occur preferentially on the low-tack side; if the difference in tack is too large, the high-tack side may suffer pull-out damage during long-term use. The range values ​​provided in this embodiment can balance the controllability of peeling and long-term service life, enabling the black adhesive 13 to maintain stable adhesion behavior in reliability tests.

[0055] Based on the foregoing embodiments, and referring to Figure 1 This embodiment provides a display module structure including a display panel 11, a lower polarizer 12, and a backlight module 14.

[0056] In this embodiment, the black adhesive used in the display module is the black adhesive 13 from the aforementioned embodiment. Please refer to [link / reference]. Figure 2 and Figure 3 .

[0057] By placing the black adhesive 13 structure of the above embodiment between the lower polarizer 12 and the backlight module 14, when the display module is subjected to drop, impact or overall deformation, the relative peeling position between the backlight layer and the lower polarizer 12 can be controlled, foreign objects can be prevented from entering, and controllable adhesive decay behavior can be maintained, so that the display module can ensure reliability and lifespan under long-term display conditions.

[0058] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not be construed as limiting the scope of protection of this application. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this application and utilizing the content described in the text and drawings of this application, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of protection of this application.

Claims

1. A black adhesive structure for bonding between a backlight module and the lower polarizer of a display panel, characterized in that: The black adhesive structure is divided into at least two segments along its length, and adjacent segments are connected by multiple elastic connecting parts. Each of the at least two adhesive segments has a first type of adhesive surface and a second type of adhesive surface for attaching to different objects; Among all adhesive surfaces of the same category, the first and second adhesive grades are alternately distributed along the length of the black adhesive structure, and the first and second adhesive grades have different adhesive properties.

2. The black glue structure according to claim 1, characterized in that, The black adhesive structure is divided into a first adhesive segment and a second adhesive segment along its length, and a serrated cut is provided at the junction between the first adhesive segment and the second adhesive segment.

3. The black glue structure according to claim 2, characterized in that, The serrated cut extends at an angle of 30°-60° to the length direction of the first and second adhesive segments.

4. The black glue structure according to claim 2, characterized in that, The plurality of elastic connecting parts are evenly spaced along the connection direction between the first adhesive segment and the second adhesive segment.

5. The black glue structure according to claim 2, characterized in that, The width of each of the elastic connecting portions is smaller than the width of the first adhesive segment and the second adhesive segment.

6. The black glue structure according to claim 2, characterized in that, The elastic modulus of the elastic connection is lower than that of the main materials of the first and second adhesive segments.

7. The black glue structure according to any one of claims 2 to 6, characterized in that, When the backlight module and the display panel are relatively displaced, the multiple elastic connecting parts are stretched and form an isolation barrier that stands vertically along the gap between the backlight module and the display panel.

8. The black glue structure according to any one of claims 2 to 6, characterized in that, The first adhesive segment and the second adhesive segment are continuously arranged in the edge bonding area between the backlight module and the display panel, and extend circumferentially along the edge bonding area.

9. The black glue structure according to any one of claims 2 to 6, characterized in that, The peel force ratio between the first tack grade and the second tack grade ranges from 3:1 to 15:

1.

10. A display module, characterized in that, The device includes a display panel, a backlight module, a lower polarizer disposed on one side of the display panel, and a black adhesive structure disposed between the lower polarizer and the backlight module, wherein the black adhesive structure is the black adhesive structure according to any one of claims 1 to 9.

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