Display module and display device

Abstract

The present application relates to a display module and a display device. The display module includes a display panel, a cover plate and a backlight module. The display panel includes a display surface and a back surface opposite to each other. The cover plate is arranged on the display surface side of the display panel, and the cover plate includes a first area and a second area, the second area is distributed around the first area, and the thickness of the second area is less than the thickness of the first area. The backlight module is arranged on the back side of the display panel, and the backlight module includes a frame, and the frame is connected to the second area of ​​the cover plate by glue. The present application can effectively improve the dark state uniformity of the display module.

Description

Technical Field

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

[0002] With the development of display technology, liquid crystal display modules have been increasingly used in the display field due to their advantages such as high responsiveness, high brightness and high contrast.

[0003] At present, liquid crystal display modules are usually composed of backlight modules and display panels. In actual applications, the backlight module not only needs to provide light source for the display panel, but also needs to provide support for the display panel. Usually, bonding is used to fix the display panel and the backlight module. However, after the backlight module and the display panel are fixed, there is usually stress between the display panel and the backlight module, resulting in poor dark state uniformity of the display module, making it difficult for the display module to meet the dark state uniformity requirements. Summary of the invention

[0004] The display module and display device provided by the embodiments of the present application can effectively improve the dark state uniformity of the display module.

[0005] On the one hand, according to an embodiment of the present application, a display module is proposed, including: a display panel, including a display surface and a back surface opposite to each other; a cover plate, arranged on the display surface side of the display panel, the cover plate including a first area and a second area, the second area is distributed around the first area, and the thickness of the second area is less than the thickness of the first area; a backlight module, arranged on the back side of the display panel, the backlight module including a frame, and the frame is connected to the second area of ​​the cover plate by glue.

[0006] On the other hand, an embodiment of the present application further provides a display device, comprising the display module as described above.

[0007] According to the display module and display device provided by the present application, the display module includes a display panel, a cover plate and a backlight module, and the cover plate is arranged on one side of the display surface of the display panel to protect the display panel. The cover plate includes a first area and a second area. The backlight module includes a frame, and the frame is connected to the second area of ​​the cover plate by glue. The frame can support the cover plate and the display panel at the same time. The thickness of the second area of ​​the cover plate is less than the thickness of the first area, so that the stress of the connection between the frame and the cover plate cannot be transmitted to the first area of ​​the cover plate, thereby reducing the possibility of the first area of ​​the cover plate being concave inward, improving the flatness of the display panel, and thus improving the dark state uniformity of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0009] Figure 1A schematic diagram of the structure of a display module provided in some embodiments of the present application;

[0010] Figure 2 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0011] Figure 3 A schematic diagram of the structure of another display module provided in some embodiments of the present application;

[0012] Figure 4 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0013] Figure 5 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0014] Figure 6 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0015] Figure 7 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0016] Figure 8 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application;

[0017] Fig. 9 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application.

[0018] Marking Description:

[0019] 100. Display module;

[0020] 1. Display panel; 11. Display surface; 12. Back surface;

[0021] 2. Cover plate; 21. First zone; 211. Protrusion; 211a. Side wall; 22. Second zone; 221. Connecting portion; 222. Transition portion; 222a. First arc segment; 222b. Second arc segment; 223. Extension portion;

[0022] 3. backlight module; 31. frame; 32. accommodation space; 33. backlight unit; 34. supporting component; 35. gap;

[0023] 4. Adhesive layer.

[0024] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0027] At present, in order to apply liquid crystal display modules to more fields, liquid crystal display modules have more and more functions, for example, touch liquid crystal display modules (Touch Liquid Crystal Display module, TLCM).

[0028] Generally, a liquid crystal display module is composed of a display panel and a backlight module. In order to realize the touch function, a cover plate is set on the TLCM. The cover plate, the display panel and the backlight module in the TLCM are connected to each other to realize the support of the backlight module to the cover plate and the display panel. However, the inventor found that during the assembly and installation of the cover plate, the display panel and the backlight module, due to the existence of process errors, the flatness of the support part in the backlight module is poor, so that the support of the backlight module to the cover plate and the display panel has stress, causing deformation of the local area of ​​the cover plate, resulting in the deflection of the liquid crystal in the display panel, so that the local area becomes brighter, forming mura, and affecting the dark state uniformity of the TLCM.

[0029] Therefore, in order to solve the above problems, the embodiments of the present application provide a display module and a display device.

[0030] In order to better understand the present application, on the one hand, the following Figures 1 to 9 The display module and the display device according to the embodiments of the present application are described in detail.

[0031] Figure 1 A schematic diagram of the structure of a display module provided in some embodiments of the present application. Figure 2 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application. Figure 3 A schematic structural diagram of another display module provided for some embodiments of the present application.

[0032] like Figures 1 to 3 As shown, an embodiment of the present application provides a display module 100. The display module 100 includes a display panel 1, a cover plate 2, and a backlight module 3. The display panel 1 includes a display surface 11 and a back surface 12 opposite to each other. The cover plate 2 is arranged on one side of the display surface 11 of the display panel 1, and the cover plate 2 includes a first area 21 and a second area 22, the second area 22 is distributed around the first area 21, and the thickness of the second area 22 is less than the thickness of the first area 21. The backlight module 3 is arranged on the back surface 12 side of the display panel 1, and the backlight module 3 includes a frame 31, and the frame 31 is connected to the second area 22 of the cover plate 2 by glue.

[0033] The display module 100 includes a display panel 1, a cover plate 2 and a backlight module 3. Optionally, the display panel 1 includes a liquid crystal display panel 1 (LCD), and the liquid crystal display panel 1 includes an array substrate and a color filter substrate that are arranged opposite to each other and a liquid crystal layer between the array substrate and the color filter substrate.

[0034] The display panel 1 includes a display surface 11 and a back surface 12, and the display surface 11 is the light emitting side of the display panel 1. The cover plate 2 is arranged on the display surface 11 side of the display panel 1, and the cover plate 2 can protect the display panel 1 and reduce the possibility of external water and oxygen erosion and scratches.

[0035] In some examples, the cover plate 2 and the display panel 1 are connected by bonding with an adhesive layer 4. Optionally, the material of the adhesive layer 4 includes a semi-solid optical adhesive (Optically Clear Adhesive, OCA) and a liquid optical adhesive (Optically Clear Adhesive, OCR). During the bonding process, the cover plate 2 and the display panel can be bonded by OCA or OCR, and the OCA or OCR is cured by a high-temperature aging process, so that the cover plate 2 and the display panel 1 can be tightly bonded. Because OCA and OCR have good fluidity, during the bonding process, the internal stress on the display panel 1 is small, thereby improving the dark state uniformity of the display module 100.

[0036] In some examples, the cover plate 2 may be a glass cover plate 2 or a transparent plastic cover plate 2. The embodiment of the present application does not impose any special restrictions on the material of the cover plate 2, as long as the cover plate 2 can display the image normally.

[0037] The cover plate 2 includes a first area 21 and a second area 22. Optionally, the projection of the first area 21 in the light emitting direction of the display module 100 can completely overlap with the projection of the display surface 11 in the light emitting direction of the display module 100. Or the projection of the display surface 11 in the light emitting direction of the display module 100 is located within the projection range of the first area 21 in the light emitting direction of the display module 100. The second area 22 is arranged around the first area 21. Optionally, the contour shape of the first area 21 includes one of a rectangle, a square or a circle, and the contour shape of the second area 22 matches the first area 21. For example, Figure 1 As shown, the outline shape of the first area 21 is a rectangle, and the outline shape of the second area 22 is a rectangular ring structure. Or the outline shape of the second area 22 is different from the shape of the first area 21. For example, Figure 3 As shown, the outline of the first area 21 is circular, and the outline of the second area 22 is rectangular.

[0038] The thickness of the second area 22 in the cover plate 2 is less than the thickness of the first area 21. Optionally, the thickness of the first area 21 is a uniform thickness, so as to ensure the display effect of the display panel 1. The thickness of the second area 22 can be a uniform thickness, or the thickness of a part of the second area 22 can be less than the thickness of the rest of the second area 22. Or the thickness of the second area 22 gradually decreases. Or the thickness of the second area 22 gradually decreases to a preset area and then gradually increases. The embodiment of the present application does not impose any special restrictions on the thickness of the second area 22, and it is sufficient to ensure that the thickness of the second area 22 is less than the thickness of the first area 21.

[0039] The backlight module 3 includes a frame 31. In some examples, the frame 31 may be a metal frame 31 or a plastic frame 31. In some examples, the backlight module 3 also includes a backlight unit 33. The backlight unit 33 is located in the frame 31. The backlight unit 33 may provide a backlight source for the display panel 1. Specifically, the backlight unit 33 includes a backlight source, a light guide plate, and an optical film layer.

[0040] Optionally, the frame 31 is connected to the second area 22 of the cover plate 2 by glue, specifically, the frame 31 and the second area 22 of the cover plate 2 can be connected by foam tape or hot melt adhesive. The foam tape or hot melt adhesive can be arranged around the display panel 1 to improve the connection reliability between the backlight module 3 and the cover plate 2. In addition, it can also prevent external water, oxygen or impurities from entering the frame 31. In some examples, the connection between the frame 31 and the cover plate 2 may also include an ink area, specifically, the ink area may be located in the second area 22 of the cover plate 2.

[0041] According to the display module 100 provided in the present application, the display module 100 includes a display panel 1, a cover plate 2 and a backlight module 3. The cover plate 2 is arranged on one side of the display surface 11 of the display panel 1, so as to protect the display panel 1. The cover plate 2 includes a first area 21 and a second area 22. The backlight module 3 includes a frame 31, and the frame 31 is connected to the second area 22 of the cover plate 2 by glue. The frame 31 can support the cover plate 2 and the display panel 1 at the same time. The thickness of the second area 22 of the cover plate 2 is less than the thickness of the first area 21, so that the stress of the connection between the frame 31 and the cover plate 2 cannot be transmitted to the first area 21 of the cover plate 2, thereby reducing the possibility of the first area 21 of the cover plate 2 being concave inward, improving the flatness of the display panel 1, and thus improving the dark state uniformity of the display module 100.

[0042] like Figure 2 As shown, in some optional embodiments, the second zone 22 includes a connecting portion 221 and a transition portion 222 , the connecting portion 221 is connected to the first zone 21 through the transition portion 222 , and the connecting portion 221 is connected to the frame 31 .

[0043] Optionally, the thickness of the connecting portion 221 may be the same as the thickness of the transition portion 222. Alternatively, the thickness of the connecting portion 221 may be smaller than the thickness of the transition portion 222, so as to reduce the impact of damage to the second area 22 of the cover plate 2 on the first area 21 when the frame 31 causes an impact force on the cover plate 2.

[0044] Optionally, the surface of the connecting portion 221 facing the frame 31 may be a flat surface, which is beneficial to the connection between the connecting portion 221 and the frame 31. Alternatively, the surface of the connecting portion 221 facing the frame 31 may be an arc-shaped surface with a preset arc, which increases the connection area between the connecting portion 221 and the frame 31, thereby improving the connection support strength between the connecting portion 221 and the frame 31.

[0045] In the embodiment of the present application, the second area 22 includes a connecting portion 221 and a transition portion 222. The connecting portion 221 is connected to the frame 31, and the connecting portion 221 is connected to the first area 21 through the transition portion 222, so that the connecting portion 221 has a sufficient area to connect to the frame 31, thereby reducing the possibility of interference between the frame 31 and the first area 21, increasing the stress dispersion ability of the second area 22, and thus improving the dark state uniformity of the display module 100.

[0046] like Figure 2 As shown, in some optional embodiments, the first area 21 includes a protruding portion 211 , the protruding portion 211 is protruding from the connecting portion 221 and the transition portion 222 on the side facing the display surface 11 , and the protruding portion 211 is connected to the display panel 1 .

[0047] Optionally, the projection of the protrusion 211 in the light emitting direction of the display module 100 completely overlaps with the projection of the display panel 1 in the light emitting direction of the display module 100. Alternatively, the projection of the display panel 1 in the light emitting direction of the display module 100 is within the projection range of the protrusion 211 in the light emitting direction of the display module 100.

[0048] It is understandable that the surface of the protrusion 211 connected to the display panel 1 and the surface of the first area 21 facing the light emitting direction can be arranged in parallel, which is beneficial to the display of the picture and the precise positioning of the touch function.

[0049] The above configuration of the embodiment of the present application is helpful to increase the thickness of the first area 21, improve the accuracy of the bonding position between the display panel 1 and the cover plate 2, and reduce the bonding difficulty.

[0050] like Figure 2 As shown, in some optional embodiments, the transition portion 222 is connected to the edge of the protruding portion 211 facing the display panel 1 , and the transition portion 222 is an arc-shaped surface with a preset curvature.

[0051] Optionally, the side wall 211a of the protrusion 211 can be connected to the transition portion 222. Exemplarily, the edge of the side wall 211a of the protrusion 211 facing the display panel 1 is connected to the transition portion 222. In order to reduce the difficulty of the manufacturing process, the transition portion 222 can be set to a curved surface so that the connection between the protrusion 211 and the transition portion 222 is smooth.

[0052] like Figure 2 As shown, in some optional embodiments, in a cross section along the thickness direction of the display module 100 , the transition portion 222 is in an arc shape, and the central angle of the arc is 30° to 90°.

[0053] Optionally, the central angle of the transition portion 222 includes 30°, 40°, 45°, 50°, 60°, 70°, 80° and 90°.

[0054] It is understandable that the larger the central angle of the transition portion 222, the higher the connection smoothness between the protrusion 211 and the transition portion 222, the larger the range of the emitted light of the display panel 1, the thicker the thickness of the transition portion 222, and the worse the stress dispersion ability of the transition portion 222. The smaller the central angle of the transition portion 222, the lower the connection smoothness between the protrusion 211 and the transition portion 222, the smaller the range of the emitted light of the display panel 1, the thinner the thickness of the transition portion 222, and the better the stress dispersion ability of the transition portion 222. In the embodiment of the present application, the central angle of the transition portion 222 is limited to 30° to 90°, and the stress dispersion ability of the transition portion 222 is improved as much as possible while ensuring the range of the emitted light of the display panel 1, thereby improving the dark state uniformity of the display module 100.

[0055] Figure 4 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application. Figure 5 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application.

[0056] like Figure 4 and Figure 5 As shown, in some optional embodiments, the transition portion 222 includes a first arc segment 222a and a second arc segment 222b connected to each other, the first arc segment 222a is connected to the protruding portion 211, the second arc segment 222b is connected to the connecting portion 221, and the curvature of the first arc segment 222a is greater than the curvature of the second arc segment 222b.

[0057] In some examples, the transition portion 222 includes a first arc segment 222a and a second arc segment 222b. In other examples, the transition portion 222 may further include a third arc segment, a fourth arc segment, and a fifth arc segment.

[0058] Optionally, the first arc segment 222a may be formed concave toward the first area 21. Alternatively, the first arc segment 222a may be formed concave toward the thickness direction of the second area 22. It is understandable that the first arc segment 222a does not interfere with the light emission range of the display panel 1, so that the first arc segment 222a has light leakage.

[0059] Optionally, the bending directions of the first arc segment 222a and the second arc segment 222b may be the same or different. Figure 4 As shown, the first arc segment 222a and the second arc segment 222b are both recessed toward the thickness direction of the cover plate 2. Figure 5 As shown, the second arc segment 222 b is formed by protruding from the connecting portion 221 , and during the connection between the frame 31 and the connecting portion 221 , the second arc segment 222 b can play a limiting role.

[0060] Through the above configuration, the embodiment of the present application can set arc segments with different curvatures according to design requirements to adjust the stress dispersion capability of the transition portion 222 .

[0061] Figure 6 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application. Figure 7 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application.

[0062] like Figure 6 and Figure 7 As shown, in some optional embodiments, the transition portion 222 is connected to the side wall 211a of the protrusion 211 on one side close to the protrusion 211, and the transition portion 222 is an arc-shaped surface with a preset curvature, or the transition portion 222 and the connecting portion 221 form a flat surface.

[0063] Optionally, the transition portion 222 is connected to the side wall 211a of the protruding portion 211. For example, the transition portion 222 is connected to a preset position of the side wall 211a of the protruding portion 211, so that an arc surface is formed between the transition portion 222 and the protruding portion 211, thereby reducing the difficulty of manufacturing the cover plate 2. Alternatively, the edge of the side wall 211a of the protruding portion 211 away from the display panel 1 is connected to the transition portion 222, so that the transition portion 222 is a flat surface.

[0064] Through the above arrangement, the embodiment of the present application reduces the influence of the transition portion 222 on the range of the light emitted by the display panel 1, so that the thickness of the second area 22 is further thinned, and the stress dispersion ability of the second area 22 is improved, thereby improving the dark state uniformity of the display module 100.

[0065] Figure 8 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application.

[0066] like Figure 8 As shown, in some optional embodiments, the second area 22 further includes an extension portion 223 , which is located on a side of the connecting portion 221 facing away from the transition portion 222 , and the backlight module 3 is connected to the connecting portion 221 and at least a portion of the extension portion 223 .

[0067] In some examples, the second area 22 includes an extension portion 223, and the extension portion 223 has a tendency to approach the frame 31 from the first area 21 to the second area 22. Exemplarily, the extension portion 223 is an arc-shaped surface, and the frame 31 can be connected to the connecting portion 221 and part of the extension portion 223, thereby improving the connection stability between the backlight module 3 and the cover plate 2. In other examples, the extension portion 223 is straight, thereby improving the protection of the frame 31 and reducing the possibility of separation between the backlight module 3 and the cover plate 2.

[0068] Fig. 9 A schematic cross-sectional structure diagram of a display module provided in some embodiments of the present application.

[0069] like Fig. 9 As shown, in some optional embodiments, the backlight module 3 includes a receiving space 32 , the display panel 1 is located in the receiving space 32 , and there is a gap between the display panel 1 and the bottom of the receiving space 32 .

[0070] In some examples, the backlight module 3 includes a receiving space 32, and the display panel 1 and the backlight unit 33 are both located in the receiving space 32. The frame 31 in the backlight module 3 supports the cover plate 2, and the cover plate 2 is connected to the display panel 1, so there is no need to set a support component 34 in the backlight module 3 to connect with the display panel 1 to support the display panel 1. There is a gap between the display panel 1 and the bottom of the receiving space 32, which reduces the interference between the display panel 1 and other functional components in the backlight module 3 during the pressing process.

[0071] Furthermore, a support component 34 may be provided in the backlight module 3, and a gap 35 may be provided between the support component 34 and the display panel 1. In the process of pressing the display module 100, the display panel 1 may move inward, so that the display panel 1 abuts against the support component 34, and the support component 34 provides a supporting force, thereby reducing the phenomenon of local depression of the rear cover plate 2 after pressing. In addition, there is a difference in flatness between the bottom wall of the accommodating space 32 of the backlight module 3 and the display panel 1, and interference may occur between the display panel 1 and the backlight module 3, thereby damaging the display panel 1. The support component 34 is provided in the accommodating space 32, and a gap 35 is provided between the support component 34 and the display panel 1, thereby reducing the possibility of interference caused by the difference in flatness between the display panel 1 and the bottom wall of the accommodating space 32 of the backlight module 3.

[0072] Optionally, the material of the supporting component 34 includes metal, foam, sponge and silicone.

[0073] Optionally, the support component 34 and the frame 31 may be an integrated structure, or the support component 34 and the frame 31 may be separate structures.

[0074] Optionally, the supporting components 34 may be located on two opposite sides of the frame 31 along a first direction, where the first direction is the length direction of the display panel 1 .

[0075] The embodiment of the present application reduces the possibility of the display panel 1 and the cover plate 2 being sunken through the above arrangement, and improves the dark state uniformity of the display module 100 .

[0076] On the other hand, an embodiment of the present application further provides a display device, comprising any one of the above display modules.

[0077] Since the display device provided in the embodiment of the present application includes the display module of any of the above embodiments, the display device provided in the embodiment of the present application has the beneficial effects of the display module of any of the above embodiments, which will not be repeated here.

[0078] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0079] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display module, characterized in that: include: A display panel, comprising a display surface and a back surface facing each other; A cover plate, disposed on one side of the display surface of the display panel, the cover plate comprising a first area and a second area, the second area is distributed around the first area, and the thickness of the second area is less than the thickness of the first area; A backlight module, arranged on the back side of the display panel, the backlight module comprising a frame, the frame being connected to the second area of ​​the cover plate by glue; The second area includes a connecting portion and a transition portion, the connecting portion is connected to the first area through the transition portion, and the connecting portion is connected to the frame; The first area includes a protruding portion, the protruding portion is protruding from the connecting portion and the transition portion on a side facing the display surface, and the protruding portion is connected to the display panel; The transition portion is connected to an edge of the protruding portion facing the display panel, and the transition portion is an arc-shaped surface with a preset curvature.

2. The display module according to claim 1, characterized in that: In a cross section along the thickness direction of the display module, the transition portion is in an arc shape, and a central angle of the arc is 30° to 90°.

3. The display module according to claim 1, characterized in that: The transition portion includes a first arc segment and a second arc segment connected to each other, the first arc segment is connected to the protruding portion, the second arc segment is connected to the connecting portion, and the curvature of the first arc segment is greater than the curvature of the second arc segment.

4. The display module according to claim 1, characterized in that: A side of the transition portion close to the protruding portion is connected to a side wall of the protruding portion, and the transition portion is an arc-shaped surface with a preset curvature.

5. The display module according to claim 1, characterized in that: The second area further includes an extension portion, which is located on a side of the connecting portion facing away from the transition portion, and the backlight module is connected to the connecting portion and at least a portion of the extension portion.

6. The display module according to claim 1, characterized in that: The backlight module comprises a containing space, the display panel is located in the containing space, and a gap is provided between the display panel and the bottom of the containing space.

7. A display device, characterized in that: Comprising a display module as described in any one of claims 1-6.

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