Display module, display device and display equipment

Abstract

The utility model discloses a display module, a display device and display equipment, the display module comprises a display panel and a back plate located on one side of the display panel, the back plate is provided with a groove and an annular protrusion surrounding the groove, a plurality of first bosses are arranged on the upper surface of the annular protrusion at intervals in the extension direction of the annular protrusion, and the first bosses are arranged on the upper surface of the annular protrusion. The first boss is connected with the display panel; the upper surface of the annular protrusion is further provided with an annular second boss arranged in the extending direction of the annular protrusion, the first boss and the second boss are arranged at intervals in the direction from the inner edge to the outer edge of the annular protrusion, and the second boss is not higher than the first boss in the thickness direction of the display panel. According to the display module, the annular second boss is arranged on the edge of the display module, so that when the display panel and the back plate are pressed and assembled, the hot melt adhesive is not prone to overflowing, the frame of the display module is reduced, and meanwhile the phenomenon that light is leaked from the edge of the front face of the display panel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display module, display device and display equipment. Background Technology

[0002] A display module is formed by bonding a display panel and a backlight assembly. In existing technologies, a back cover is placed on the outside of the backplate of the backlight assembly to reduce the gap between the back cover and the panel, preventing glue overflow during hot melt adhesive assembly. This solution results in a larger bezel and higher cost. Alternatively, a baffle is placed on the outer edge of the backplate, with the display panel inside the baffle. This avoids glue leakage, but still results in a larger bezel and higher cost, and may also cause front light leakage. Another option is to place the backplate on one side of the display panel, which reduces the bezel and avoids front light leakage, but the gap between the display panel and the backplate can easily cause glue leakage. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a display module in which an annular second protrusion is provided on the edge, making it less likely for hot melt adhesive to overflow when the display panel and back panel are pressed and assembled, reducing the bezel of the display module, and preventing light from leaking out from the front edge of the display panel.

[0004] This utility model also aims to provide a display device having the above-mentioned display module.

[0005] This utility model also aims to provide a display device having the above-mentioned display device.

[0006] A display module according to an embodiment of the first aspect of the present invention includes a display panel and a back plate located on one side of the display panel. The back plate has a groove and an annular protrusion surrounding the groove. Along the extending direction of the annular protrusion, a plurality of first protrusions are spaced apart on the upper surface of the annular protrusion, and the first protrusions are connected to the display panel.

[0007] The upper surface of the annular protrusion is further provided with an annular second protrusion arranged along the extension direction of the annular protrusion. The first protrusion and the second protrusion are spaced apart along the direction from the inner edge to the outer edge of the annular protrusion. Along the thickness direction of the display panel, the second protrusion is not higher than the first protrusion.

[0008] According to some embodiments of the present invention, along the thickness direction of the display panel, the second boss and the first boss have a height difference a, wherein 0.08mm≤a≤0.12mm.

[0009] According to some embodiments of the present invention, the first boss is disposed on the inner edge of the annular protrusion, and the second boss is disposed on the outer edge of the annular protrusion.

[0010] According to some embodiments of the present invention, the first boss, the second boss, and the annular protrusion are integrally formed parts.

[0011] According to some embodiments of the present invention, the orthographic projection of the display panel is entirely located within the back plate.

[0012] According to some embodiments of the present invention, the distance between the projection edge of the display panel on the back plate and the edge of the back plate is b, wherein 0.19mm≤b≤0.21mm.

[0013] According to some embodiments of the present invention, the side of the second boss that faces away from the first boss is an arc surface.

[0014] According to some embodiments of the present invention, the display panel has an annular light-absorbing layer on the side facing the back plate;

[0015] The display panel includes a display area and a non-display area surrounding the display area, and the light-absorbing layer is disposed in the non-display area.

[0016] This application provides a display module with an annular second protrusion disposed on the upper surface of an annular protrusion along the extending direction of the annular protrusion. The first and second protrusions are spaced apart along the direction from the inner edge to the outer edge of the annular protrusion. Thus, when the back panel and display panel are pressed together, the annular second protrusion can prevent hot melt adhesive from overflowing from the outer side of the annular protrusion. The height of the second protrusion along the thickness direction of the display panel is no higher than that of the first protrusion. In this way, the second protrusion can be completely located on one side of the display panel, preventing hot melt adhesive from overflowing while not extending to the side of the display panel. This reduces the bezel of the display module. Furthermore, since the second protrusion is located on one side of the display panel, light leaking from gaps such as the middle frame and the first protrusion cannot be reflected by the second protrusion and leak from the front of the display panel, improving the display effect.

[0017] The display device according to a second aspect of the present invention includes the display module in the above embodiment.

[0018] The display device according to the present utility model reduces the size of the display device, improves the display effect, and enhances the appearance of the display device by adopting the display module in the above embodiment.

[0019] The display device according to a third aspect of the present invention includes the display apparatus in the above embodiments.

[0020] The display device according to the present utility model reduces the size of the display device, improves the display effect, and enhances the appearance of the display device by adopting the display device in the above embodiments.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the display module of the first solution in the prior art;

[0023] Figure 2 This is a cross-sectional view of a display module based on the second solution in the prior art;

[0024] Figure 3 This is another cross-sectional view of the display module in the second scheme of the prior art;

[0025] Figure 4 This is a cross-sectional view of the display module of the third solution in the prior art;

[0026] Figure 5 This is a cross-sectional view of a display module according to an embodiment of this application;

[0027] Figure 6 This is a partial schematic diagram of the assembly of the middle frame and back plate of the display module according to an embodiment of this application;

[0028] Figure 7 This is a side view of a display module according to an embodiment of this application.

[0029] Figure label:

[0030] Display module 100

[0031] Display panel 10, display area 11, non-display area 12

[0032] Back panel 20, groove 21, annular protrusion 22, first boss 23, second boss 24, backlight film 30, back shell 40, middle frame 50. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0035] An LCM (LCD Module) is an electronic component used to display images and text. It consists of one or more liquid crystal screens and can display text, images, and other information. A display module is an assembly that combines liquid crystal display devices, connectors, peripheral circuits such as control and drive circuits, PCB circuit boards, backlights, structural components, and other components.

[0036] A liquid crystal module (LCM) mainly consists of a polarizing plate, a CF layer and a TFT layer, an alignment (PI) film, an inductively coupled metal (ITO) layer, a frame sealant, spacers, liquid crystals, and a backlight module. The polarizing plate primarily functions as a grating, allowing light to pass through in only one direction and protecting the CF and TFT layers. The CF and TFT layers are positioned one above the other to create an electric field, causing the liquid crystals to align in a specific direction. The alignment (PI) film provides directional properties, allowing the liquid crystals to align regularly on it. The inductively coupled metal (ITO) layer allows current to pass through the upper and lower glass layers, controlling the orientation of the liquid crystals. The frame sealant prevents the liquid crystals from contacting the outside environment. The spacers support the upper and lower substrates. The liquid crystals are aligned under different electric fields to achieve varying light transmittance, thus achieving the display principle. The backlight module provides a backlight source to display the signal changes of the LCD.

[0037] The display device includes a substrate and a light-emitting layer. The light-emitting layer consists of a thin film and an electrode. When a voltage is applied to the electrode, the orientation of the liquid crystal molecules in the light-emitting layer changes, thereby changing the light transmittance of the light-emitting layer and achieving the display effect.

[0038] Common LCD panel types include TN panels, VA panels such as MVA and PVA, IPS panels, and CPA panels.

[0039] Generally, the panel and backlight assembly are assembled and fixed with hot melt adhesive. The adhesive dispensing height is usually 0.3 mm ± 0.1 mm. In order to ensure the reliability of the assembly of the panel and backlight assembly, the hot melt adhesive needs to be sufficient. Therefore, when the panel and backlight assembly are pressed together, adhesive overflow will inevitably occur on the inner and outer sides. Since there are height limiting protrusions on the inner side of the adhesive surface and an assembly distance of about 0.7 mm is reserved for adhesive overflow, the adhesive overflow phenomenon is mainly manifested on the outer side of the adhesive overflow surface.

[0040] To reduce adhesive overflow on the outer side of the adhesive application surface when the panel and backlight assembly are fixed with hot melt adhesive, refer to... Figure 1 The first solution in the prior art uses a back cover 40 on the outside of the backlight assembly, and sets the gap between the back cover 40 and the panel to be smaller than the gap between the back plate of the backlight assembly and the panel. This reduces the overflow of hot melt adhesive on the outside of the adhesive surface. However, setting the back cover on the outside of the backlight assembly makes the bezel of the display module larger. Specifically, the bezel can be as small as 7.4mm, which increases the production cost.

[0041] Or, refer to Figure 2 The second existing solution integrates the backlight panel and the back cover 40 into a single component. A baffle extends from the side of this single component, with the panel located within the space enclosed by the baffle. The baffle prevents hot melt adhesive from overflowing. However, the presence of the baffle limits the frame size to approximately 6.7mm, smaller than the aforementioned solution, but there is still room for further reduction. Furthermore, an assembly gap needs to be reserved between the baffle and the panel, typically 0.4±0.3mm, while the gap between the inner wall of the baffle and the panel at the tolerance limit is 0.7mm. A middle frame overlaps between the height-limiting bosses on the inner side of the adhesive surface. Assembly gaps exist between the middle frame, the height-limiting bosses, and the outer side of the adhesive surface, which the semi-solid hot melt adhesive cannot completely fill. When the gap between the inner wall of the baffle and the panel is large, light from the side of the panel leaks out through the gap. Since the side baffle is typically made of metal, the light is reflected by the metal and emitted from the front, resulting in light leakage from the front of the product.

[0042] Or, refer to Figure 3 and Figure 4 The third solution in the prior art places the back plate on one side of the panel, with the height limiting boss on the inner side of the dispensing surface connected to the panel, and the outer side of the dispensing surface spaced apart from the panel to set the dispensing space. In this way, the bezel of the display module can be as small as about 5.5mm. Since there is no barrier on the side of the panel, light cannot be reflected by the barrier and leak out from the front of the panel. However, the gap between the panel and the back plate can easily cause glue leakage.

[0043] Based on this, the present invention proposes a display module 100. By setting an annular second protrusion 24, the display module 100 makes it difficult for hot melt adhesive on the side of the second protrusion 24 facing the first protrusion 23 to overflow when the display panel 10 and the back plate 20 are pressed and assembled, and reduces the bezel of the display module 100. At the same time, it avoids the phenomenon of light leaking out from the front edge of the display panel 10.

[0044] Figures 5-7 This is a schematic diagram of the structure of the display module 100 according to an embodiment of the present utility model. (Refer to...) Figure 5 and Figure 6 The display module 100 includes a display panel 10, which may include a glass substrate, a conductive layer, a thin-film transistor, a liquid crystal molecule layer, etc., stacked together. The display panel 10 includes a display area 11 and a non-display area 1211.

[0045] Reference Figure 5 The display module 100 also includes a backlight assembly, which includes a backplate 20 located on one side of the display panel 10. The backplate 20 may be made of metal and is used to provide support.

[0046] The backlight assembly also includes a backlight film 30, which is located on the side of the back panel 20 facing the display panel 10.

[0047] Reference Figure 5 The backplate 20 has a groove 21, which can be located in the middle area of ​​the backplate 20. The backlight film 30, as well as the conductive layer, thin film transistor, liquid crystal molecule layer, etc., can be located in the groove 21.

[0048] Reference Figure 5 The back plate 20 also has an annular protrusion 22 surrounding the groove 21. The annular protrusion 22 is used to connect the glass substrate, and the annular protrusion 22 and the glass substrate can be bonded together with hot melt adhesive. Specifically, along the extending direction of the annular protrusion 22, a plurality of first protrusions 23 are provided at intervals on the upper surface of the annular protrusion 22. The shape and size of the first protrusions 23 are not limited, for example, they can be rectangular, square, circular, elliptical, etc. The plurality of first protrusions 23 can be evenly arranged or randomly arranged. Preferably, the plurality of first protrusions 23 are evenly distributed along the extending direction of the annular protrusion 22.

[0049] Reference Figure 5 and Figure 6Along the direction from the inner edge to the outer edge of the annular protrusion 22, one or multiple first protrusions 23 can be provided. Providing only one first protrusion 23 along the direction from the inner edge to the outer edge of the annular protrusion 22 reduces the occupied area and allows for more space for adhesive dispensing. Providing multiple first protrusions 23 along the direction from the inner edge to the outer edge of the annular protrusion 22 improves the connection reliability between the back panel 20 and the display panel 10. Considering the above, preferably, one first protrusion 23 is provided along the direction from the inner edge to the outer edge of the annular protrusion 22, and it is located away from the outer edge of the annular protrusion 22. This increases the dispensing space while ensuring the connection reliability between the display panel 10 and the back panel.

[0050] Reference Figure 4 and Figure 6 The first protrusion 23 is connected to the display panel 10 to connect the back plate 20 to the display panel 10. It is understood that the first protrusion 23 and the display panel 10 can be bonded together with hot melt adhesive.

[0051] Reference Figure 4 In some embodiments, the display module 100 further includes a middle frame 50. The cross-section of the middle frame 50 along the thickness direction of the display panel 10 can be Z-shaped. One end of the middle frame 50 overlaps between two adjacent first protrusions 23, and the other end is supported on the side of the display panel 10 facing the back plate 20, for supporting the display panel 10. Furthermore, a buffer layer can be provided between the other end of the middle frame 50 and the display panel 10. For example, the buffer layer can be foam.

[0052] It is understandable that due to assembly tolerances, there will be gaps between the middle frame 50 and the first boss 23 and the second boss 24. During the pressing assembly process of the display panel 10 and the back panel 20, the hot melt adhesive may not be able to completely fill the gaps, so light may leak out through the gaps.

[0053] Reference Figure 5 The upper surface of the annular protrusion 22 is also provided with an annular second protrusion 24 arranged along the extension direction of the annular protrusion 22. The first protrusion 23 and the second protrusion 24 are spaced apart along the direction from the inner edge to the outer edge of the annular protrusion 22 so as to form a dispensing space between the first protrusion 23 and the second protrusion 24 on the upper surface of the annular protrusion 22. At the same time, when a certain dispensing distance is reserved between the annular protrusion 22 and the display panel 10, and the dispensing is sufficient, for example, after the dispensing height is 0.3mm, when the back plate 20 and the display panel 10 are pressed together, the annular second protrusion 24 can play the role of preventing hot melt adhesive from overflowing on the outside of the annular protrusion 22.

[0054] It is understood that the second protrusion 24 can be located at any position between the outer edge of the annular protrusion 22 and the first protrusion 23, as long as the second protrusion 24 and the first protrusion 23 are spaced apart to allow for adhesive dispensing space. One or more second protrusions 24 can be provided. Preferably, only one second protrusion 24 is provided to increase the adhesive dispensing space and improve the assembly reliability of the back plate 20 and the display panel 10.

[0055] Reference Figure 5 Along the thickness direction of the display panel 10, the second protrusion 24 is not higher than the first protrusion 23. In this way, the second protrusion 24 can be completely located on one side of the display panel 10, which can prevent hot melt adhesive from overflowing while not extending to the side of the display panel 10. This reduces the bezel of the display module 100. Specifically, the bezel of the display module 100 can be about 5.5mm. Furthermore, since the second protrusion 24 is located on one side of the display panel 10, light leaking from the gaps between the middle frame 50 and the first protrusion 23 and the second protrusion 24 cannot be reflected by the second protrusion 24 and leak out from the front of the display panel 10, thus improving the display effect.

[0056] Specifically, along the thickness direction of the display panel 10, the height of the second protrusion 24 can be the same as or lower than the height of the first protrusion 23. For example, the height of the second protrusion 24 can be one-half, two-thirds, or three-quarters of the height of the first protrusion 23.

[0057] Therefore, referring to Figure 5 and Figure 6 According to the display panel 10 of this utility model, an annular second protrusion 24 is provided on the upper surface of the annular protrusion 22 along the extending direction of the annular protrusion 22, and the first protrusion 23 and the second protrusion 24 are spaced apart along the direction from the inner edge to the outer edge of the annular protrusion 22. In this way, when the back plate 20 and the display panel 10 are pressed together, the annular second protrusion 24 can prevent hot melt adhesive from overflowing on the outside of the annular protrusion 22. The height of the second protrusion 24 along the thickness direction of the display panel 10 is not higher than that of the first protrusion 23. In this way, the second protrusion 24 can be completely located on one side of the display panel 10, which can prevent hot melt adhesive from overflowing while not extending to the side of the display panel 10, thereby reducing the bezel of the display module 100. Furthermore, since the second protrusion 24 is located on one side of the display panel 10, light leaking from the gaps between the middle frame 50 and the first protrusion 23 cannot be reflected by the second protrusion 24 and leak out from the front of the display panel 10, thus improving the display effect.

[0058] In some embodiments of this utility model, reference is made to Figure 5 Along the thickness direction of the display panel 10, the second boss 24 and the first boss 23 have a height difference a, where 0.08mm≤a≤0.12mm.

[0059] Since assembly errors may occur during product assembly, requiring rework, if the second protrusion 24 and the first protrusion 23 have the same height in the thickness direction of the display panel 10, that is, if no gap is set between the second protrusion 24 and the display panel 10, it will be inconvenient to disassemble the display panel 10 and the backlight, or the product may be easily damaged when disassembled, increasing production costs.

[0060] Therefore, in the thickness direction of the display panel 10, the second boss 24 is set to be lower than the lower boss, so that when the product needs to be reworked, the display panel 10 and the back plate 20 can be separated through the gap between the second boss 24 and the display panel 10, which facilitates the rework operation, is less likely to damage the product, and reduces the rework cost.

[0061] Reference Figure 5 The second boss 24 and the first boss 23 are set to have a height difference a, and 0.08mm≤a≤0.12mm. In this way, the smaller gap is not conducive to the overflow of hot melt adhesive, and at the same time, it is convenient for the gap rework operation.

[0062] Specifically, the height difference 'a' between the second boss 24 and the first boss 23 can be 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, etc., and preferably, the height difference 'a' between the second boss 24 and the first boss 23 is 0.10mm.

[0063] In some embodiments, refer to Figure 5 The glass cover has a notch on one side edge facing the back plate 20. The size of the notch gradually increases along the direction from the inner edge to the outer edge of the annular protrusion 22, so that the operator can quickly find the gap between the display panel 10 and the back plate 20 during rework, thus improving rework efficiency.

[0064] In some embodiments of this utility model, reference is made to Figure 5 The first boss 23 is located on the inner edge of the annular protrusion 22, and the second boss 24 is located on the outer edge of the annular protrusion 22.

[0065] The first boss 23 is located on the inner edge of the annular protrusion 22, and the second boss 24 is located on the outer edge of the annular protrusion 22. This increases the distance between the first boss 23 and the second boss 24, that is, it increases the dispensing space and the amount of dispensing, which helps to increase the bonding reliability between the display panel 10 and the back panel 20.

[0066] Specifically, the orthographic projections of the first protrusion 23 and the second protrusion 24 both fall within the orthographic projection of the annular protrusion 22, and the orthographic projection of the side of the first protrusion 23 away from the second protrusion 24 coincides with the orthographic projection of the inner edge of the annular protrusion 22, and the orthographic projection of the side of the second protrusion 24 away from the first protrusion 23 coincides with the orthographic projection of the outer edge of the annular protrusion 22.

[0067] Of course, this application is not limited to this. In other embodiments, the first protrusion 23 is disposed on the inner edge of the annular protrusion 22. Specifically, the orthographic projection of the first protrusion 23 falls within the orthographic projection of the annular protrusion 22, and the orthographic projection of the side of the first protrusion 23 away from the second protrusion 24 coincides with the orthographic projection of the inner edge of the annular protrusion 22. The second protrusion 24 can be disposed at any position between the first protrusion 23 and the outer edge of the annular protrusion 22. Alternatively, the second protrusion 24 is disposed on the outer edge of the annular protrusion 22. Specifically, the orthographic projection of the second protrusion 24 falls within the orthographic projection of the annular protrusion 22, and the orthographic projection of the side of the second protrusion 24 away from the first protrusion coincides with the orthographic projection of the outer edge of the annular protrusion 22. The first protrusion 23 can be disposed at any position between the second protrusion 24 and the inner edge of the annular protrusion 22.

[0068] In some embodiments of this utility model, reference is made to Figure 5 The first boss 23, the second boss 24, and the annular protrusion 22 are integrally formed parts.

[0069] The first boss 23, the second boss 24, and the annular protrusion 22 are made into a single molded part, which improves the reliability and stability of the back plate 20 structure, facilitates assembly, and improves assembly efficiency.

[0070] Of course, this application is not limited to this. In other embodiments, one of the first boss 23 and the second boss 24 is integrally formed with the annular protrusion 22. Specifically, the first boss 23 and the annular protrusion 22 are integrally formed, and the second boss 24 is fixedly connected to the annular protrusion 22, for example, by gluing, etc.; or, the second boss 24 and the annular protrusion 22 are integrally formed, and the first boss 23 is fixedly connected to the annular protrusion 22, for example, by gluing, etc. It is also possible that both the first boss 23 and the second boss 24 are fixedly connected to the annular protrusion 22, for example, by gluing, etc.

[0071] In some embodiments of this utility model, reference is made to Figures 5-7 The front projection of the display panel 10 is completely located within the back panel 20.

[0072] The orthographic projection of the display panel 10 is completely located within the back plate 20. That is, in the thickness direction of the display panel 10, the four sides of the display panel 10 are at least on the same plane as the back plate 20. In this way, when the display panel 10 is impacted from the side, the back plate 20 can bear at least part of the impact force and play a certain protective role for the display panel 10.

[0073] Specifically, the four edges of the display panel 10 may coincide with the four edges of the back panel 20 in the thickness direction of the display panel 10; or, the four edges of the display panel 10 may be located within the four edges of the back panel 20 in the thickness direction of the display panel 10. The distance between different positions of the display panel 10 and the corresponding positions of the four edges of the back panel 20 may be the same or different.

[0074] For example, refer to Figure 7 The display panel 10 is rectangular. Along the length of the display panel 10, the distance between the left edge of the display panel 10 and the left edge of the back panel 20 on the projection of the display panel 10 onto the back panel 20 is c, and the distance between the right edge of the display panel 10 and the right edge of the back panel 20 is d. Along the width of the display panel 10, the distance between the upper edge of the display panel 10 and the upper edge of the back panel 20 on the projection of the display panel 10 onto the back panel 20 is e, and the distance between the upper edge of the display panel 10 and the upper edge of the back panel 20 is f. Here, c, d, e, and f can all be the same or partially the same.

[0075] When parts c, d, e, and f are the same, for example, c, d, e, and f can be two of the same, and the remaining two can be the same or different, but different from the first two. For example, c and d are the same, e and f are the same, but c and e are different; or c and d are the same, e and f are different, and c, e, and f are different. Similarly, "two of the same" can also be: c and e are the same, c and f are the same, d and e are the same, and e and f are the same.

[0076] When parts c, d, e, and f are the same, for example, three of c, d, e, and f are the same, and the remaining one is different. For example, c, d, and e are the same, and f is different; or c, d, and f are the same, and e is different; or d, e, and f are different from c.

[0077] In some embodiments of this utility model, reference is made to Figure 7 The distance between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 is b, where 0.19mm≤b≤0.21mm.

[0078] The distance between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 is set to b, so that the edge of the back plate 20 extends beyond the edge of the display panel 10. This ensures that when the display module 100 is impacted at any position on the side, the back plate 20 will absorb the impact force before the display panel 10, thus protecting the display panel 10. Furthermore, due to assembly tolerances when assembling the display panel 10 and the back plate 20, setting the distance between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 to be the same helps ensure that the orthographic projection of the display panel 10 falls completely within the back plate 20.

[0079] Specifically, the distance b between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 can be 0.19mm, 0.20mm, 0.21mm, etc. Preferably, the distance b between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 is 0.20mm.

[0080] It should be noted that the assembly distance is related to three parameters, specifically the dimensional tolerance B of the display panel 10, the dimensional tolerance C of the back panel 20, and the assembly tolerance D. The theoretical formula for calculating the limit value of the assembly distance A is as follows: The optimal values ​​for the existing process are given for the dimensional tolerance B, the dimensional tolerance C of the back plate 20, and the assembly tolerance D. Specifically, B is 0.1 mm, C is 0.25 mm, and D is 0.1 mm. The limit value of A is calculated to be approximately 0.17 mm.

[0081] The following description uses an example where the distance b between the projection edge of the display panel 10 onto the back plate 20 and the edge of the back plate 20 is 0.20 mm.

[0082] The distance b between the projection edge of the display panel 10 and the edge of the back panel 20 is 0.20 mm. Based on calculations, all possible limits are shown in Table 1 below. The distances between the left / right / top / bottom edges of the display panel 10 and the edge of the back panel 20 are c / d / e / f, respectively. Figure 7 As shown in Table 1, it can be concluded that with a design value of cdef of 0.20mm and an assembly distance of the limit value of 0.17mm, the distance between the four edges of the display panel 10 and the four edges of the back panel 20 is between 0mm and 0.4mm, which can meet the processing requirements.

[0083]

[0084] Table 1. Limit distances between the four sides of the display panel 10 and the back panel 20

[0085] In some embodiments of this utility model, reference is made to Figure 5 The side of the second protrusion 24 that faces away from the first protrusion 23 is an arc surface.

[0086] The side of the second boss 24 that faces away from the first boss 23 is made into an arc surface, which can improve structural strength, reduce stress concentration, enhance the machinability of parts, and improve wear resistance and aesthetics.

[0087] Specifically, the second protrusion 24 smoothly transitions from the side opposite to the first protrusion 23 to the side opposite to the annular protrusion 22. The curvature can be set according to the actual situation and is not limited here.

[0088] In some embodiments of this utility model, reference is made to Figure 7 The display panel 10 has an annular light-absorbing layer on the side facing the back panel 20; the display panel 10 includes a display area 11 and a non-display area 1211 surrounding the display area 11, and the light-absorbing layer is disposed in the non-display area 1211.

[0089] A ring-shaped light-absorbing layer is provided in the non-display area 1211 on the side of the display panel 10 facing the back panel 20 to prevent light from passing through the non-display area 1211 of the display panel 10 and causing light leakage from the front of the display panel 10.

[0090] Since black has light-absorbing properties, the light-absorbing layer can be a black ink layer coated on the non-display area 1211 of the display panel 10. Of course, this application is not limited to this. In other embodiments, the light-absorbing layer can also be other black substances or other materials with light-absorbing properties.

[0091] The display device according to a second aspect of the present invention includes the display module 100 in the above embodiments.

[0092] The display device according to the present utility model reduces the size of the display device, improves the display effect, and enhances the appearance of the display device by adopting the display module 100 in the above embodiment.

[0093] It is understood that the display device possesses all the features and advantages of the aforementioned display module 100, which will not be elaborated upon here.

[0094] Display devices are products with image display capabilities. For example, a display device can be any of the following: mobile phone, monitor, television, billboard, digital photo frame, laser printer with display function, personal digital assistant (PDA), digital camera, portable camcorder, viewfinder, navigator, vehicle, large-area wall, home appliance, information query equipment (such as business query equipment for e-government, banks, hospitals, power companies, etc.), monitor, etc. A display device can also be a microdisplay or a product containing a microdisplay. Products containing microdisplays can be any of the following: smartwatch, smart bracelet, helmet display, stereoscopic display, and AR devices (such as AR glasses), VR devices (such as VR glasses), etc. For example, a microdisplay can be a display with a display size ranging from approximately 0.2 inches to approximately 2.5 inches, but is not limited to this. Understandably, a microdisplay can also be a display with a smaller display size, such as a display size less than or equal to 0.2 inches.

[0095] The display device according to a third aspect of the present invention includes the display apparatus in the above embodiments.

[0096] The display device according to the present utility model reduces the size of the display device, improves the display effect, and enhances the appearance of the display device by adopting the display device in the above embodiments.

[0097] It is understandable that this display device possesses all the features and advantages of the aforementioned display devices, which will not be elaborated upon here.

[0098] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0099] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0100] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or that the first feature is at a lower horizontal level than the second feature.

[0101] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0102] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A display module, characterized by The device includes a display panel and a back plate located on one side of the display panel. The back plate has a groove and an annular protrusion surrounding the groove. Along the extending direction of the annular protrusion, a plurality of first protrusions are spaced apart on the upper surface of the annular protrusion. The first protrusions are connected to the display panel. The upper surface of the annular protrusion is further provided with an annular second protrusion arranged along the extension direction of the annular protrusion. The first protrusion and the second protrusion are spaced apart along the direction from the inner edge to the outer edge of the annular protrusion. Along the thickness direction of the display panel, the second protrusion is not higher than the first protrusion.

2. The display module of claim 1, wherein, Along the thickness direction of the display panel, the second boss and the first boss have a height difference 'a', where 0.08mm≤a≤0.12mm.

3. The display module of claim 1, wherein, The first boss is located on the inner edge of the annular protrusion, and the second boss is located on the outer edge of the annular protrusion.

4. The display module of claim 1, wherein, The first boss, the second boss, and the annular protrusion are integrally formed parts.

5. The display module of claim 1, wherein, The orthographic projection of the display panel is entirely located within the back panel.

6. The display module of claim 5, wherein, The distance between the projection edge of the display panel onto the back plate and the edge of the back plate is b, where 0.19mm ≤ b ≤ 0.21mm.

7. The display module of claim 1, wherein, The side of the second boss that faces away from the first boss is an arc surface.

8. The display module of claim 1, wherein, The display panel has an annular light-absorbing layer on the side facing the back plate; The display panel includes a display area and a non-display area surrounding the display area, and the light-absorbing layer is disposed in the non-display area.

9. A display device, characterized by Includes the display module as described in any one of claims 1-8.

10. A display device, characterized by Includes the display device as described in claim 9.

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