Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a display panel, a circuit board, a first protective layer and a second protective structure. The display panel has a display side and a back side arranged oppositely along the thickness direction. The circuit board is arranged on the back side of the display panel and comprises a device area. The first protective layer is arranged on the side of the circuit board away from the display panel and covers at least the device area. The second protective structure comprises an enclosing part arranged around the edge of the first protective layer. In the display module of the application, the enclosing part of the second protective structure is arranged around the edge of the first protective layer to form a lateral sealing barrier, which can block the penetration of liquids such as sweat into the device area from the side. The double barrier formed by the first protective layer and the second protective structure can block the liquid penetration path, ensuring the stability of the circuit board and its components during testing, improving the testing accuracy and avoiding the interference of external factors leading to inaccurate test results.

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] Before a display device leaves the factory, it typically undergoes reliability-related simulation tests, among which artificial sweat testing is essential. This test simulates the stability of the display screen's bonding under the corrosive conditions of hand sweat during use. However, during sweat testing, sweat can easily seep into the circuit board, causing sample failure, resulting in inaccurate and unreliable test evaluation results. This severely impacts work efficiency, significantly increases testing time, and wastes manpower. Utility Model Content

[0004] In view of this, embodiments of this application provide a display module and display device that can solve the problems of test results being affected by sweat seepage, reducing work efficiency and increasing costs, ensuring test accuracy and improving production efficiency.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a display module, which includes:

[0007] The display panel has a display side and a back side that are arranged opposite to each other along the thickness direction;

[0008] A circuit board is disposed on the back side of the display panel, and the circuit board includes a component area;

[0009] A first protective layer is disposed on the side of the circuit board opposite to the display panel, and the first protective layer at least covers the device area;

[0010] The second protective structure includes a enclosure portion that is disposed around the edge of the first protective layer.

[0011] As an improvement to the display module in this application embodiment, the second protective structure includes ultraviolet-curable adhesive.

[0012] As an improvement to the display module in this application embodiment, the orthographic projection of the device area on the display panel is located within the orthographic projection of the first protective layer on the display panel;

[0013] Preferably, the enclosure portion is fitted to the edge sidewall of the first protective layer;

[0014] Preferably, the enclosure portion is rectangular in shape.

[0015] As an improvement to the display module in this application embodiment, the dimension of the enclosure portion along the thickness direction of the display panel is greater than or equal to the thickness of the edge of the first protective layer.

[0016] As an improvement to the display module in this application embodiment, the orthographic projection of the first protective layer on the display panel does not overlap with the orthographic projection of the second protective structure on the display panel;

[0017] Alternatively, the orthographic projection of the first protective layer on the display panel lies within the orthographic projection of the second protective structure on the display panel.

[0018] As an improvement to the display module in this application embodiment, the first protective layer includes black tape.

[0019] As an improvement to the display module in this application embodiment, the second protective structure further includes a cover portion located on the side of the first protective layer away from the circuit board;

[0020] Preferably, the enclosure portion is disposed on the outer periphery of the covering portion;

[0021] Preferably, the covering part and the enclosure part are integrally formed.

[0022] As an improvement to the display module in this application embodiment, the display panel includes a display part, a bending part, and a binding part. The bending part connects the display part and the binding part. The binding part is bent to the back side of the display part through the bending part. The circuit board is connected to the binding part.

[0023] Preferably, the circuit board is a flexible circuit board.

[0024] As an improvement to the display module in this application embodiment, the display module further includes:

[0025] A support layer is located between the display panel and the circuit board; the surface of the circuit board facing the display panel is bonded to the surface of the support layer facing away from the display panel.

[0026] Preferably, the enclosure portion is at least partially in contact with the surface of the support layer opposite to the display panel.

[0027] Secondly, embodiments of this application provide a display device that includes the display module described above.

[0028] Compared with the prior art, the display module provided in this application has the following advantages:

[0029] In the display module provided in this application embodiment, the first protective layer covers the device area, protecting the components on the circuit board from the back side and preventing them from being affected by minor external scratches, dust, etc. The enclosure part of the second protective structure surrounds the edge of the first protective layer, forming a lateral sealing barrier, which can prevent liquids such as sweat from seeping into the device area from the side. Through the double barrier formed by the first protective layer and the second protective structure, the liquid penetration path can be blocked, ensuring the stability of the circuit board and its components during testing, improving test accuracy, and avoiding inaccurate test results due to interference from external factors.

[0030] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the display module and display device provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the planar distribution of display modules in related technologies;

[0033] Figure 2 This is a schematic diagram of the planar distribution of a display module provided in one embodiment of this application;

[0034] Figure 3 for Figure 2 A schematic diagram of the cross-section along the AA direction;

[0035] Figure 4 This is a schematic diagram of the layered structure of a display module provided in another embodiment of this application;

[0036] Figure 5 for Figure 2 A schematic diagram of the cross-section along the BB direction.

[0037] Marker explanation:

[0038] 100. Display module; 1. Display panel; 11. Display part; 12. Bending part; 13. Binding part; 2. Circuit board; 21. Component area; 3. First protective layer; 4. Second protective structure; 41. Enclosure part; 42. Covering part; 5. Support layer; 6. Elevating block. Detailed Implementation

[0039] The following description, with reference to the accompanying drawings, illustrates preferred embodiments of this application, demonstrating its implementability. These embodiments provide a complete overview of the application to those skilled in the art, making its technical content clearer and easier to understand. This application can be embodied in many different forms, and its scope of protection is not limited to the embodiments mentioned herein.

[0040] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this application does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of components is appropriately exaggerated in some places in the drawings. The drawings are not drawn to a 1:1 scale, and the relative dimensions of the elements are shown in the drawings only as examples and are not necessarily drawn to actual scale.

[0041] Furthermore, the following descriptions of the embodiments are based on the accompanying illustrations, illustrating specific embodiments in which this application can be implemented. Directional terms used in this application, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] When a component is described as being "on" another component, the component may be placed directly on the other component; alternatively, there may be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "installed to" or "connected to" another component, both can be understood as being directly "installed" or "connected" to, or as being indirectly "installed to" or "connected to" another component via an intermediate component.

[0043] With the widespread use of mobile electronic devices, the quality and reliability of display devices such as mobile phones and tablets have attracted much attention. Before products are shipped, multiple reliability simulation tests must be conducted, and artificial sweat testing is a key part of this process. It is mainly used to evaluate the stability of the bonding parts when exposed to hand sweat corrosion during daily use.

[0044] exist Figure 1 The diagram illustrates the structure of a display module 100 in the related technology. The display module 100 includes a display panel 1 and a circuit board 2. The circuit board 2 includes a component area 21. A protective tape is applied to the side of the circuit board 2 away from the display panel 1, covering at least the component area 21. In conventional sweat testing procedures, acidic or alkaline sweat is applied to the outer periphery of the component area 21 on the circuit board 2. However, the inventors of this application have discovered the following problems with the related technology: the protective tape is not firmly attached and the edges easily lift, allowing sweat to seep in along the gaps between the tape and the circuit board, corroding components, causing sample failure, and directly affecting the accuracy and reliability of the test results. To obtain reliable data, repeated testing is necessary, significantly increasing testing time and labor costs, severely restricting production efficiency. Therefore, the traditional tape application method suffers from problems such as weak tape adhesion and sweat seepage, making it difficult to meet the requirements of display device reliability testing.

[0045] Based on this, this application provides a display module and a display device to solve the above problems.

[0046] Firstly, referring to Figure 2 , Figure 3 As shown, this application embodiment provides a display module 100. The display module 100 includes a display panel 1, a circuit board 2, a first protective layer 3, and a second protective structure 4. The display panel 1 has a display side and a back side disposed opposite each other along its thickness direction. The circuit board 2 is disposed on the back side of the display panel 1 and includes a device area 21. The first protective layer 3 is disposed on the side of the circuit board 2 facing away from the display panel 1, and the first protective layer 3 at least covers the device area 21. The second protective structure 4 includes a retaining portion 41, which surrounds the edge of the first protective layer 3.

[0047] The display panel 1 can be a flexible display screen, such as an Organic Light Emission Diode (OLED) display screen. The side of the display panel 1 that emits light is the display side, and the side facing away from the display side is the back side. The circuit board 2 is used in conjunction with the display panel 1 to realize the display function. The device area 21 of the circuit board 2 refers to the area used to set electronic components.

[0048] It should be noted that the first protective layer 3 at least covers the device area 21, meaning that the device area 21 is located within the projection range of the first protective layer 3 along the thickness direction. The first protective layer 3 may also cover other areas of the circuit board 2; or, the device area 21 overlaps with the projection range of the first protective layer 3 along the thickness direction.

[0049] For example, the first protective layer 3 can be a layer structure that provides physical protection for electronic components to prevent damage to them from other components. Alternatively, the first protective layer 3 can also be a layer structure that provides electrical isolation for electronic components to prevent electrical interference from other components. Or, the first protective layer 3 can serve both physical protection and electrical isolation functions.

[0050] The aforementioned display module 100, through the first protective layer 3 covering the device area 21, can protect the components on the circuit board 2 from the back side, preventing them from being affected by minor external scratches, dust, etc. The enclosure part 41 of the second protective structure 4 surrounds the edge of the first protective layer 3, forming a lateral sealing barrier, which can prevent liquids such as sweat from seeping into the device area 21 from the side. Through the double barrier formed by the first protective layer 3 and the second protective structure 4, the liquid penetration path can be blocked, ensuring the stability of the circuit board 2 and its components during testing, improving test accuracy, and avoiding inaccurate test results due to external interference.

[0051] In some possible embodiments, the second protective structure 4 includes a UV-curable adhesive.

[0052] Specifically, UV-curable adhesives are a type of adhesive that can be cured by exposure to ultraviolet light. Under ultraviolet light, they can usually be cured within a few seconds to tens of seconds, which improves production efficiency.

[0053] The second protective structure 4 uses ultraviolet-curing adhesive. Ultraviolet-curing adhesive cures quickly and has strong adhesion, which can quickly form a high-strength sealed protective layer. It can tightly fill the gaps that may appear around the first protective layer 3 and the circuit board 2, completely blocking the liquid penetration path and enhancing the reliability of protection.

[0054] The enclosure 41, formed after the UV-curing adhesive has cured, can adhere to the sidewall of the first protective layer 3. The enclosure 41 surrounds the edge of the first protective layer 3 and adheres to the edge sidewall of the first protective layer 3, eliminating lateral gaps and preventing liquid intrusion through the edges. The enclosure 41 and the first protective layer 3 form a closed protective structure, which can comprehensively block external liquids, dust, and other impurities from contacting the first protective layer 3 and the device area 21. It can more effectively prevent sweat from seeping in from all directions, improve the protective effect, ensure the stability of the display module during testing and use, and ensure the accuracy of test results.

[0055] Optionally, the enclosure 41 is rectangular in shape. This shape is compatible with common circuit board shapes, simplifies the manufacturing process, facilitates standardization and large-scale manufacturing, reduces costs, and at the same time better meets the protection requirements of the device area 21, ensuring stable testing.

[0056] In some possible embodiments, the orthographic projection of the device area 21 on the display panel 1 lies within the orthographic projection of the first protective layer 3 on the display panel 1. By covering the edge of the device area 21 with the first protective layer 3, it is ensured that the critical device area 21 on the circuit board 2 is completely covered, thus improving protection accuracy.

[0057] In some possible embodiments, the dimension of the barrier portion 41 along the thickness direction of the display panel 1 is greater than or equal to the thickness of the edge of the first protective layer 3. Wherein, the dimension of the barrier portion 41 in the thickness direction is not less than the edge thickness of the first protective layer 3, ensuring that the barrier height is sufficient to cover the edge of the first protective layer 3, preventing liquid from seeping into the device area 21 from above, and enhancing the overall protection.

[0058] In some possible embodiments, such as Figure 3 As shown, the orthographic projection of the first protective layer 3 on the display panel 1 does not overlap with the orthographic projection of the second protective structure 4 on the display panel 1. By setting the first protective layer 3 on the back side of the device area 21 and not setting the second protective structure 4, the protection effect is improved while saving costs.

[0059] Or, such as Figure 4 As shown, the orthographic projection of the first protective layer 3 on the display panel 1 lies within the orthographic projection of the second protective structure 4 on the display panel 1. This avoids gaps between the first protective layer 3 and the second protective structure 4, reducing the risk of leakage.

[0060] It should be noted that the orthographic projection on the display panel 1 refers to the projection onto the planar area of ​​the display panel 1 along the thickness direction of the display panel 1.

[0061] In some possible embodiments, the first protective layer 3 includes black adhesive tape. The black tape has a certain degree of adhesion, allowing it to firmly adhere to the circuit board 2 and fix the circuit board 2 to the display panel 1, providing basic physical protection and electrical insulation. Furthermore, black tape is low in cost, readily available, and easy to process, facilitating its large-scale application in the production of the display module 100, thus controlling production costs while ensuring protective effectiveness. The black material also provides light shielding, reducing interference from external light on sensitive components.

[0062] In some possible embodiments, such as Figure 4 As shown, the second protective structure 4 also includes a cover portion 42, which is located on the side of the first protective layer 3 away from the circuit board 2.

[0063] The second protective structure 4 enhances the protection of the first protective layer 3 and the device area 21 by the cover part 42, preventing the first protective layer 3 from tilting upwards and reducing the intrusion of foreign objects, dust, liquids, etc. from above. In artificial sweat testing, it can better prevent sweat from penetrating into the device area from above, improve the reliability of the display module in complex environments, and ensure stable testing.

[0064] Optionally, the enclosure 41 is disposed on the outer periphery of the cover 42, and the cover 42 and the enclosure 41 are integrally formed. The enclosure 41 is disposed on the periphery of the cover 42 and the two are integrally formed, so that the second protective structure 4 forms a continuous and complete protective structure. This structure can more effectively prevent liquid from entering from the sides and edges, resulting in better protective performance. In testing, it can greatly reduce the risk of sweat seepage, improve the display module 100's resistance to external erosion, and thus improve the reliability and efficiency of the test.

[0065] Furthermore, the cover 42 is attached to the surface of the first protective layer 3 on the side opposite to the circuit board 2.

[0066] The covering part 42 and the enclosure part 41 are closely fitted with the first protective layer 3 to form a reliable protective space, blocking external liquids, dust and other impurities from contacting the first protective layer 3 and the device area 21. This can more effectively prevent sweat from seeping in from all directions, improve the protective effect, ensure the stability of the display module 100 during testing and use, and ensure the accuracy of the test results.

[0067] During the preparation process, liquid ultraviolet (UV) curable adhesive can be coated on the back and sidewalls of the first protective layer 3 in all directions for UV curing treatment. It can change from liquid to solid within tens of seconds to form the second protective structure 4, achieving efficient bonding. This ensures that sweat cannot penetrate during the test, ensuring the accuracy of the experiment and improving work efficiency.

[0068] In some possible embodiments, such as Figure 5 As shown, the display panel 1 includes a display part 11, a bending part 12 and a binding part 13. The bending part 12 connects the display part 11 and the binding part 13. The binding part 13 is bent to the back side of the display part 11 through the bending part 12. The circuit board 2 is connected to the binding part 13.

[0069] Optionally, the circuit board 2 is a flexible circuit board 2.

[0070] Specifically, the display unit 11 includes functional film layers such as an array substrate, a light-emitting layer, and a touch layer, which are used to convert electrical energy into light energy and emit light through their light-emitting surfaces, thereby providing a light source for the display panel 1 and displaying an image. The bonding part 13 is bent to the back side of the display unit 11 by the bending part 12 and fixed to the back side of the display unit 11. The circuit board 2 is a flexible printed circuit board (FPC). One end of the circuit board 2 is connected to the bonding part 13, and the other end is provided with a connection port. This connection port is used to connect the display panel 1 to the controller, enabling the display panel 1 to display the desired image.

[0071] In some possible embodiments, the display module 100 further includes a support layer 5, which is disposed on the back side of the display panel 1 and is located between the display panel 1 and the circuit board 2.

[0072] The surface of the circuit board 2 facing the display panel 1 is bonded to the surface of the support layer facing away from the display panel 1.

[0073] Optionally, the enclosure portion 41 is at least partially in contact with the surface of the support layer 5 on the side opposite to the display panel 1.

[0074] The support layer 5 provides mechanical support for the display panel 1 and the circuit board 2, preventing structural deformation caused by bending or vibration. The enclosure part 41 contacts the back part of the support layer 5, which can enhance the sealing effect and structural stability, while dispersing external pressure and improving the overall structural strength.

[0075] The display module 100 may further include a shim block 6, which is disposed on the side of the support layer 5 away from the display section 11 and located between the binding section 13 and the display section 11. The shim block 6 is used to support the binding section 13.

[0076] For example, the sweat testing process of the display module 100 of this application is as follows:

[0077] Tape application: Following standard procedures, the black tape, which serves as the first protective layer 3, is accurately applied to the device area 21 to ensure coverage of critical protection areas, tight adhesion, and no bubbles or wrinkles.

[0078] UV curing procedure: Apply an appropriate amount of UV-curable adhesive evenly to the device area 21 where the tape has been applied, and then place it in the UV curing equipment. Based on the adhesive properties and equipment parameters, set a suitable curing time (generally tens of seconds) and light intensity. Start the equipment to allow the adhesive to cure rapidly under ultraviolet light, forming a robust second protective structure 4.

[0079] Testing and Verification: An artificial sweat test was conducted on the treated display module 100. Following standard testing methods, the prepared sweat was evenly applied around the black adhesive tape on the device area 21. During the test, close observation was maintained for any sweat seepage. Test data was recorded and compared with the test results of samples that did not use this method to verify its effectiveness.

[0080] Secondly, embodiments of this application provide a display device, which includes the display module 100 described in the first aspect. Further, the display device can be a mobile or fixed terminal with a display module, such as a mobile phone, television, tablet computer, laptop computer, Ultra-Mobile Personal Computer (UMPC), Personal Digital Assistant (PDA), or virtual reality device.

[0081] The aforementioned display device, by covering the component area with the first protective layer, can initially protect the components on the circuit board from minor external scratches, dust, and other influences. The second protective structure covers the sidewall of the first protective layer, which can prevent liquids such as sweat from seeping into the component area from the side, ensuring the stability of the circuit board and its components during testing, improving test accuracy, and avoiding inaccurate test results due to external interference.

[0082] 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.

[0083] 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.

[0084] 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 has a display side and a back side that are arranged opposite to each other along the thickness direction; A circuit board is disposed on the back side of the display panel, and the circuit board includes a component area; A first protective layer is disposed on the side of the circuit board opposite to the display panel, and the first protective layer at least covers the device area; The second protective structure includes a barrier portion and a cover portion. The barrier portion is disposed around the edge of the first protective layer and is attached to the edge sidewall of the first protective layer. The cover portion is located on the side of the first protective layer away from the circuit board to prevent the first protective layer from lifting upward.

2. The display module according to claim 1, characterized in that, The second protective structure includes a UV-curable adhesive.

3. The display module according to claim 1, characterized in that, The enclosure is rectangular in shape.

4. The display module according to claim 1, characterized in that, The orthographic projection of the device area on the display panel is located within the orthographic projection of the first protective layer on the display panel.

5. The display module according to claim 1, characterized in that, The dimension of the enclosure portion along the thickness direction of the display panel is greater than or equal to the thickness of the edge of the first protective layer.

6. The display module according to claim 1, characterized in that, The orthographic projection of the first protective layer on the display panel does not overlap with the orthographic projection of the second protective structure on the display panel; Alternatively, the orthographic projection of the first protective layer on the display panel lies within the orthographic projection of the second protective structure on the display panel.

7. The display module according to claim 1, characterized in that, The first protective layer comprises black tape.

8. The display module according to claim 1, characterized in that, The enclosure is located on the outer periphery of the cover.

9. The display module according to claim 1, characterized in that, The covering part and the enclosure part are integrally formed.

10. The display module according to claim 1, characterized in that, The display panel includes a display section, a bending section, and a bonding section. The bending section connects the display section and the bonding section. The bonding section is bent to the back side of the display section through the bending section. The circuit board is connected to the bonding section.

11. The display module according to claim 10, characterized in that, The circuit board is a flexible circuit board.

12. The display module according to claim 1, characterized in that, The display module also includes: A support layer is located between the display panel and the circuit board; the surface of the circuit board facing the display panel is bonded to the surface of the support layer facing away from the display panel.

13. The display module according to claim 12, characterized in that, The enclosure portion is at least partially in contact with the surface of the support layer on the side opposite to the display panel.

14. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 13.

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