Display module, display panel and display device

Abstract

The utility model discloses a display module, a display panel and a display device. The display module comprises a back plate, a light source, an annular middle frame, an optical film material, a liquid crystal panel and an annular front frame, the annular middle frame comprises a plurality of split middle frames, and each split middle frame comprises a first outer frame part perpendicular to the back plate, a first bottom frame part at least in lap joint with part of the back plate and a first inner frame part facing one side of the light source. The first inner frame part of each split middle frame and the back plate form an accommodating cavity; the annular front frame comprises split front frames corresponding to the split middle frames, and each split front frame comprises a second outer frame part at least covering part of the first outer frame part and a second bottom frame part at least covering part of the back plate in lap joint with the corresponding position of the first bottom frame part; the first inner frame part comprises a bearing part located at the end position of the side away from the back plate, and the optical film material and the liquid crystal panel are located on the side, away from the back plate, of the bearing part.

Description

Technical Field

[0001] This utility model relates to the field of display technology. More specifically, it relates to a display module, a display panel, and a display device. Background Technology

[0002] Currently, most large-size outdoor displays use LED (light-emitting diode) direct-view products, which are low-cost but lack sufficient image detail when viewed at close range. Applying widely used indoor LCD splicing panels to outdoor applications is problematic because their structure and display capabilities cannot meet the environmental conditions. This necessitates considering both the variability and complexity of outdoor environments in product design and the reliability of the product in outdoor settings. Therefore, a display module specifically designed for outdoor applications is needed that can meet customization and low-cost requirements while ensuring the stability and quality of each display in various outdoor environments. Utility Model Content

[0003] The purpose of this utility model is to provide a display module, a display panel, and a display device to solve at least one of the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The first aspect of this utility model provides a display module, the display module including a back plate, a light source located on the back plate, an annular middle frame, an optical film, a liquid crystal panel, and an annular front frame, wherein...

[0006] The annular frame includes multiple split frames, each of which includes: a first outer frame portion perpendicular to the back plate, a first bottom frame portion overlapping at least part of the back plate, and a first inner frame portion facing the light source. The first inner frame portion of each split frame and the back plate form a cavity.

[0007] The annular front frame includes a split front frame corresponding to each of the split middle frames. Each of the split front frames includes: a second outer frame portion that at least covers a portion of the first outer frame portion and a second bottom frame portion that at least covers a portion of the back plate at the position corresponding to the first bottom frame portion.

[0008] The first inner frame portion includes a support portion located at an end position away from the back plate, and the optical film and the liquid crystal panel are located on the side of the support portion away from the back plate.

[0009] In an optional embodiment, the first inner frame portion further includes a support portion perpendicular to the first bottom frame portion and a transition portion connecting the support portion and the load-bearing portion.

[0010] The surface of the transition section facing the light source is an arc surface.

[0011] or

[0012] A reflective sheet is attached to the surface of one or all of the transition section, the support section, and the back plate facing the light source.

[0013] In an optional embodiment, the first outer frame portion, the first bottom frame portion, and the first inner frame portion form a middle frame cavity;

[0014] Adjacent split frames are connected by a connecting structure, the connecting structure including:

[0015] An insertion part that is inserted into the cavity of the middle frame of the adjacent split middle frame;

[0016] A connecting part that connects adjacent plug parts.

[0017] The connecting part is made of a hard material, or

[0018] The connecting part is made of soft material.

[0019] In an optional embodiment, the direction from the back plate to the liquid crystal panel is a first direction, and the direction opposite to the first direction is a second direction;

[0020] The first outer frame portion includes:

[0021] A first protrusion located near the back plate extends in the second direction from the first bottom frame portion;

[0022] A groove is formed between the first protrusion and the first bottom frame.

[0023] The back plate extends into the tank.

[0024] One or more locations between the back plate and the first protrusion or between the back plate and the first bottom frame are filled with a first adhesive layer.

[0025] In an optional embodiment, the display module further includes:

[0026] The ink layer is located on the surface of the liquid crystal panel at the end position, away from the back plate.

[0027] The second adhesive layer is located on the top surface of the support portion away from the back plate, and fixes the support portion and the optical film.

[0028] The third adhesive layer is located between the optical film and the liquid crystal panel, with the liquid crystal panel fixed to the side of the optical film away from the back plate.

[0029] The fourth adhesive layer is located in the gap between the surface of the second outer frame portion facing the liquid crystal panel and the ink layer;

[0030] The fifth adhesive layer is located between the back plate and the light source.

[0031] In an optional embodiment, the liquid crystal panel has a front-side bonding structure, and the surface of the liquid crystal panel away from the back panel is bonded to the bonding portion of the display module;

[0032] The split front frame corresponding to the location of the bonding part also includes a protective part, the projection of the protective part onto the liquid crystal panel covers the projection of the bonding part onto the liquid crystal panel;

[0033] In the first direction from the back plate to the liquid crystal panel, the second outer frame portion corresponding to the location of the bonding portion completely covers the first outer frame portion;

[0034] The second bottom frame covers the first protrusion of the first outer frame and the surface of the back plate away from the light source.

[0035] In an optional embodiment, the liquid crystal panel has a side-bonded structure, and the surface of the liquid crystal panel near the second outer frame is bonded to the bonding portion of the display module;

[0036] In the first direction from the back plate to the liquid crystal panel, the height of the second outer frame portion corresponding to the location of the bonding portion is higher than the height between the surface of the liquid crystal panel away from the back plate and the back plate.

[0037] The second outer frame portion covers the bonding portion on a surface perpendicular to the back plate.

[0038] The second bottom frame portion covers the first protrusion of the first outer frame portion and the surface of the back plate away from the light source, to form an integral structure of the bent second bottom frame portion and the second outer frame portion.

[0039] In an optional embodiment, in the first direction from the back panel to the liquid crystal panel,

[0040] The height of the second outer frame portion of the split front frame at the location of the non-bonded structure is higher than the height between the surface of the liquid crystal panel away from the back panel and the back panel.

[0041] The second outer frame portion of the split front frame at the location of the non-bonded structure covers a portion of the first outer frame portion corresponding to the edge.

[0042] In an optional embodiment, the second outer frame portion and the second bottom frame portion of the split front frame at the location of the non-bonded structure are split structures, with the surface of the first outer frame portion not covered by the second outer frame portion exposed between the second outer frame portion and the second bottom frame portion.

[0043] The second outer frame portion is fixed to the first outer frame portion at the corresponding position;

[0044] The second bottom frame portion is fixed to the first bottom frame portion at the corresponding position.

[0045] In an optional embodiment, the light source is a direct-lit sub-millimeter light-emitting diode light source, or

[0046] The display module also includes a reinforcing rib disposed on the non-light-emitting side of the display module. One end of the reinforcing rib is fixed to the split front frame, and the other end is fixed to the split front frame or the split middle frame at the opposite side.

[0047] The second aspect of this utility model provides a display device, which includes the display module provided in the first aspect of this utility model.

[0048] The third aspect of this utility model provides a display device, which includes the display panel provided in the first aspect of this utility model.

[0049] The beneficial effects of this utility model are as follows:

[0050] This utility model embodiment combines the assembly structure of the light source, the split-structure annular middle frame, and the split-structure annular front frame to design the display module in a modular way. This design is suitable for outdoor environments with large temperature variations, avoids positional shifts between the various components of the display module caused by excessive temperature differences, and improves the reliability of the display module. Attached Figure Description

[0051] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0052] Figure 1 This diagram shows a cross-sectional view of the display module according to the first embodiment of the present invention;

[0053] Figure 2 This diagram shows an overall schematic of the split middle frame according to an embodiment of the present invention;

[0054] Figure 3 This diagram shows a structural schematic of the split middle frame at the corner position of an embodiment of the present invention;

[0055] Figure 4 This diagram shows a structural schematic of the connection structure according to an embodiment of the present invention.

[0056] Figure 5 and Figure 6 The diagram shows the fixing of the back plate and the split middle frame in different embodiments of the present invention;

[0057] Figure 7 This is an enlarged schematic diagram showing the top position of the display panel in an embodiment of the present invention;

[0058] Figure 8 and Figure 9 This invention provides a schematic diagram of the split front frame structure according to different embodiments of the present invention.

[0059] Figure 10 This diagram shows a structural schematic of an embodiment of the present invention at a non-binding location;

[0060] Figure 11 A schematic diagram of the reinforcing rib in an embodiment of this utility model is shown. Detailed Implementation

[0061] To more clearly illustrate this utility model, the following description, in conjunction with embodiments and accompanying drawings, further explains the present utility model. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of this utility model.

[0062] If LCD panels, which are widely used indoors, are applied to outdoor applications, the following problems may occur without structural modifications:

[0063] OC (Open Cell, LCD Panel) Jump: When the ambient temperature changes greatly, the components of the display product, such as the metal backplate, plastic frame, and diffuser plate in the optical film layer, have a large coefficient of linear expansion. These are all materials that are prone to thermal expansion and contraction. When the deformation of these components is large, it will affect the opening size of the entire backlight module, and thus affect the relative position of the backlight module and the LCD panel. If the LCD panel is significantly offset, the LCD panel jump problem is likely to occur.

[0064] Excessive temperature rise: Backlight modules for outdoor display products have high brightness, placing high demands on their heat dissipation and insulation. If the backlight module remains lit for extended periods, its temperature will rise significantly. This causes the air inside the casing to expand due to heat, and the lifespan of the light source will be severely reduced at high temperatures, directly affecting the display effect and lifespan of the display product.

[0065] Sealing performance: Outdoor environments are complex, and sufficient sealing performance is required to ensure the overall quality of the display product. Once moisture or dust enters, it will not only affect the display effect, but also directly affect the product's lifespan.

[0066] In view of this, the present invention proposes a display module, a display panel, and a display device to solve one or more of the above problems.

[0067] The first embodiment of this utility model proposes a display module, such as... Figure 1 As shown, the display module includes a back plate 10, a light source 20 located on the back plate 10, an annular middle frame 30, an optical film 40, a liquid crystal panel 50, and an annular front frame 60, wherein...

[0068] The annular frame 30 includes a plurality of split frames 31. Each split frame 31 includes: a first outer frame portion 311 perpendicular to the back plate 10, a first bottom frame portion 312 that overlaps with at least part of the back plate 10, and a first inner frame portion 313 facing the light source 20. The first inner frame portion 313 of each split frame 31 and the back plate 10 form a cavity, and the light source 313 is placed in the cavity.

[0069] The annular front frame 60 includes a split front frame 61 corresponding to each of the split middle frames 31. Each split front frame 61 includes: a second outer frame portion 611 that at least covers a portion of the first outer frame portion 311 and a second bottom frame portion 612 that at least covers a portion of the back plate 10 at the position corresponding to the first bottom frame portion 312.

[0070] The first inner frame portion 313 includes a support portion 3131 located at an end position away from the back plate 10, and the optical film and the liquid crystal panel 50 are located on the side of the support portion 3131 away from the back plate 10.

[0071] This utility model embodiment combines the assembly structure of the light source 20, the split annular middle frame 30, and the split annular front frame 60 to design the structure of the display module in a split manner. This design is suitable for outdoor environments with large temperature variations, avoids positional shifts between the various components of the display module caused by excessive temperature differences, and improves the reliability of the display module.

[0072] In an optional embodiment, the back plate 10 is a glass back plate. Compared with traditional metal back plates, glass back plates have the advantages of good material stability under outdoor exposure, wind and rain, small component deformation, no corrosion problems, and a more beautiful appearance.

[0073] Furthermore, traditional metal back panels require the creation of entirely new molds for stamping, which is expensive and time-consuming, resulting in a relatively long overall product development cycle. In contrast, the glass back panel in this embodiment eliminates the high cost of mold creation and utilizes automated laser cutting equipment, ensuring complete and efficient molding. The glass back panel requires no additional structural components; adhesive materials are used to bond the various parts together, thus avoiding yield reduction issues caused by secondary processing.

[0074] In an optional embodiment, the light source 20 is a direct-lit sub-millimeter light-emitting diode (MiniLED) to meet the high brightness requirements of outdoor products. Preferably, the direct-lit sub-millimeter light-emitting diode is made of a glass substrate, whose high hardness and high heat resistance make it more suitable for outdoor environments.

[0075] In an optional embodiment, the display module further includes a fifth adhesive layer 95 located between the backplate 10 and the light source 20. For example, the glass substrate of the light source 20 and the glass backplate 10 can be connected by applying a layer of glass adhesive. Using glass adhesive as the fifth adhesive layer 95 has two advantages: firstly, the glass adhesive can be directly applied using automated spraying equipment, avoiding the instability of manual operation; secondly, the glass adhesive has good sealing and adhesion properties, ensuring a reliable bond.

[0076] Figure 2 This diagram shows an overall schematic of the split middle frame 31 according to an embodiment of the present invention. Figure 2 As shown, the separate mid-frames 31 are assembled to form an annular mid-frame 30 corresponding to the shape of the liquid crystal panel 50. The annular mid-frame 30 and the back plate 10 form a cavity, and a light source 20 is disposed within the cavity. The bottom of the annular mid-frame 30 is fixed to the back plate 10, and the support portion 3131 at the top of the annular mid-frame 30 is used to fix optical film materials, such as glass-based diffuser plates. In this embodiment, the separate mid-frame 31 is made of aluminum profile, which is formed by extrusion, resulting in lower cost and easier processing.

[0077] In an optional embodiment, such as Figure 1 As shown, the first inner frame portion 313 further includes a support portion 3133 perpendicular to the first bottom frame portion 312 and a transition portion 3132 connecting the support portion 3133 and the bearing portion 3131.

[0078] In this embodiment, the structure of each split frame 31 is designed such that the first inner frame 313 forms a raised overall structure facing the light source 20, which enhances the overall strength of the split frame 31.

[0079] In an optional embodiment, such as Figure 1As shown, the surface of the transition portion 3132 facing the light source 20 is an arc-shaped surface. This design maximizes the amount of light entering the surface, thereby reducing the darkening of the surrounding area. For example, the arc-shaped surface can also be a small flat surface, which can similarly improve the darkening of the surrounding area.

[0080] In an optional embodiment, such as Figure 1 As shown, a reflective sheet is attached to the surface of one or all of the transition portion 3132, the support portion 3133, and the back plate 10 facing the light source 20.

[0081] In this embodiment, the reflective sheet includes a side reflective sheet 71 attached to any position of the first inner frame portion 313 of the split frame 31, and a bottom reflective sheet 72 attached to the surface of the back plate 10 facing the light source 20, to prevent the corresponding position of the first inner frame portion 313 from darkening and improve the display effect.

[0082] In an optional embodiment, such as Figure 3 The diagram shows the structure of adjacent split-frame 31 at a corner location. The adjacent split-frame 31 are connected by a connecting structure 80, as shown below. Figure 1 and Figure 4 As shown, the first outer frame portion 311, the first bottom frame portion 312, and the first inner frame portion 313 form a middle frame cavity. On the one hand, the middle frame cavity further reduces the weight of the display module and lowers the cost while ensuring the overall strength. On the other hand, the middle frame cavity in this embodiment is used to connect and fix adjacent split middle frames 31.

[0083] For example, such as Figure 4 As shown in 4a and 4b, the connection structure 80 includes: an insertion part 81 inserted into the cavity of the middle frame of the adjacent split middle frame 31 and a connection part 82 connecting the adjacent insertion parts 81, thereby realizing the connection of the adjacent split middle frames 31.

[0084] Depending on the temperature variations in the outdoor environment, the connection method of adjacent split frames 31 may differ, specifically:

[0085] In an optional embodiment, if the display module is used in an outdoor environment with an ambient temperature difference ≤20°C, the connecting part 82 can be made of a rigid material to form a rigid connection. For example, the connecting part 82 can be a rigid corner block forming a closed cavity. Under such an ambient temperature difference, the deformation of the split frame 31 is small, and it has little impact on the opening size of the backlight module.

[0086] In another optional embodiment, if the display module is used in an outdoor environment with an ambient temperature difference > 20°C, the connecting part 82 can be made of a soft material to form a flexible connection. The split frame 31 undergoes significant expansion and contraction deformation when there is a large ambient temperature difference, which can cause compression at the four corner joints, leading to an increase in backlight size or gaps at the corners. Therefore, in this embodiment, the connecting part 82 is set as a flexible connection. The insert part 81 is inserted into the cavity inside the split frame 31. The insert part 81 and the split front frame 61 can be fixed together with bolts. For example, the connecting part 82 is made of a compressible material (rubber, compressed cotton, etc.) to release the stress caused by the expansion or contraction of the split frame 31, reducing the impact of the deformation of the split frame 31 on the display effect when the temperature changes.

[0087] In an optional embodiment, the direction from the backplate 10 to the liquid crystal panel 50 is a first direction, and the direction opposite to the first direction is a second direction, that is, Figure 1 The direction that is vertically upward is the first direction, and the direction that is vertically downward is the second direction.

[0088] This embodiment is described with respect to the direction. It is worth noting that the direction limitation in this embodiment does not affect the overall solution of the utility model. The direction limitation is only for the purpose of explaining the positional relationship of each component. Therefore, the specific solution of this embodiment is still based on the relative positional relationship between each component.

[0089] In an optional embodiment, such as Figure 5 and Figure 6 As shown, the first outer frame portion 311 includes:

[0090] A first protrusion 3111 located near the back plate 10 has a surface on the side away from the back plate 10 that protrudes in the second direction from the surface on the side away from the back plate 10 of the first bottom frame portion 312, and the first protrusion 3111 extends in the second direction from the first bottom frame portion 312.

[0091] A groove is formed between the first protrusion 3111 and the first bottom frame portion 312, and the back plate 10 extends into the groove.

[0092] One or more locations between the back plate 10 and the first protrusion 3111 or between the back plate 10 and the first bottom frame 312 are filled with a first adhesive layer 91, thereby fixing the back plate 10 and the split middle frame 31.

[0093] Considering the high sealing requirements of display modules in outdoor applications, especially in terms of waterproofing and dustproofing, this embodiment utilizes a first adhesive layer 91 to fix the back panel 10 and the split mid-frame 31, avoiding structures with large gaps such as openings or clips. For example, the first adhesive layer 91 is a highly viscous transparent colloid with a thickness controlled between 1 and 2 tons. This highly viscous transparent colloid has good waterproof performance. Considering the complexity of outdoor environments, it is necessary to ensure that the first adhesive layer 91 does not delaminate even in high-temperature and high-humidity environments, thus guaranteeing the reliability of the display module.

[0094] like Figure 5 As shown, the first adhesive layer 91 can be disposed between the horizontal surface of the back plate 10 facing the light source 20 and the horizontal surface of the overlapping portion of the first bottom frame portion 312 and the back plate 10.

[0095] In another embodiment, such as Figure 6 As shown, the first adhesive layer 91 can also be disposed between the vertical sidewall of the first protrusion 3111 and the sidewall of the back plate 10 extending into the tank.

[0096] In this structure, considering the convenience of operation of automatic glue coating equipment or manual operation, the clamping device directly grabs the side wall edge of the back plate 10 to coat the first adhesive layer 91. After completion, the back plate 10 can be directly inserted into the groove. After the four sides of the back plate 10 are fixed to the corresponding split middle frame 31, the horizontal and vertical directions of the back plate 10 are restricted.

[0097] Based on the high requirements for sealing performance, waterproof and dustproof performance of the display module when applied to outdoor environments, this embodiment further utilizes adhesive materials with bonding properties, and selects more reasonable adhesive material designs at the connection or contact points of various components.

[0098] In an optional embodiment, such as Figure 5 and enlarged schematic diagram Figure 7 As shown, the display module further includes:

[0099] The second adhesive layer 92 is located on the top surface of the support portion 3131 on the side away from the back plate 10, and fixes the support portion 3131 and the optical film.

[0100] The third adhesive layer 93 is located between the optical film and the liquid crystal panel 50, and the liquid crystal panel 50 is fixed to the side of the optical film away from the back plate 10.

[0101] In this embodiment, the top position of the split frame 31 is a support portion 3131, which supports the optical film and liquid crystal panel 50 placed above it, and forms a certain distance from the light source 20 for display. Since the second adhesive layer 92 and the third adhesive layer 93 are disposed inside the display module, in one example, the adhesiveness of the second adhesive layer 92 and the third adhesive layer 93 can be less than that of the first adhesive layer 91. For example, the second adhesive layer 92 and the third adhesive layer 93 can be made of transparent adhesive. For example, the thickness of the second adhesive layer 92 is about 0.2T. Considering that the split frame 31 expands and contracts when the ambient temperature changes, the elasticity of the second adhesive layer 92 can form a certain stretch, thus limiting the deformation of the split frame 31, reducing the probability of poor image quality caused by large size displacement, and also preventing damage to the glass material in the highly stable optical film layer.

[0102] In an optional embodiment, such as Figure 7 As shown, the display module also includes an ink layer 96, which is located on the surface of the liquid crystal panel 50 at the end position away from the back plate 10.

[0103] Considering the narrow bezel of the black matrix of the LCD panel 50, the risk of light leakage is also the greatest. To ensure that no light leakage occurs at the edges of the LCD panel 50, this embodiment applies a black ink layer 96 to the four corners of the LCD panel 50 to prevent light leakage from the display module. For example, it is ensured that the ink layer 96 passes the cross-cut adhesion test and does not turn red or purple, thus avoiding affecting the surrounding display effect.

[0104] Furthermore, in an optional embodiment, such as Figure 7 As shown, the display panel also includes a fourth adhesive layer 94, located in the gap between the second outer frame portion 611 on the side facing the liquid crystal panel 50 and the ink layer 96.

[0105] like Figure 7 As shown, a fourth adhesive layer 94 is filled between the split front frame 61 and the liquid crystal panel 50 coated with ink layer 96 to further ensure the sealing effect of the product, and at the same time, it can also block light leakage from the narrow slit under wide viewing angle. For example, the fourth adhesive layer 94 is a hot melt adhesive.

[0106] Based on the above embodiments of this utility model, the design of adhesive layers using different materials at different locations ensures sealing performance. A fourth adhesive layer 94 is used at the top of the display module to fill the gap between the liquid crystal panel 50 and the split frame 31. A first adhesive layer 91 with better waterproof properties is used at the bottom of the display module to wrap around the module. A second adhesive layer 92 and a third adhesive layer 93 are used inside to ensure the module's waterproof and dustproof effect.

[0107] Depending on the bonding method between the display panel and the driver chip, this embodiment designs different structures for the split front frame 61 to adapt to different bonding structures.

[0108] In an optional embodiment, the liquid crystal panel 50 has a front-side bonding structure, where the surface of the liquid crystal panel 50 away from the back plate 10 is bonded to the bonding portion of the display module. In this embodiment, the front-side bonding structure means that the driver chip is directly bonded to the front side of the display panel (i.e., one side of the display area). This bonding method reduces the signal transmission distance and interference, and improves the stability and speed of signal transmission. Since the bonding position is on the front side of the display area, the process is relatively simple and easy to automate.

[0109] Based on the positive bonding structure, in one optional embodiment, such as Figure 8 As shown, the split front frame 61 corresponding to the location of the bonding part also includes a protective part 613. The orthographic projection of the protective part 613 onto the liquid crystal panel 50 covers the orthographic projection of the bonding part onto the liquid crystal panel 50. That is, the area of ​​the protective part 613 is larger than the area of ​​the bonding part, so as to protect the bonding part.

[0110] In the first direction from the back plate 10 to the liquid crystal panel 50, the second outer frame portion 611, corresponding to the location of the bonding portion, completely covers the first outer frame portion 311, forming an integral structure of the bent protective portion 613 and the second outer frame portion 611. The second bottom frame portion 612 covers the first protrusion 3111 of the first outer frame portion 311 and the surface of the back plate 10 away from the light source 20, forming an integral structure of the bent second bottom frame portion 612 and the second outer frame portion 611.

[0111] That is, the display module in this embodiment is Figure 8 The “C-shaped” front frame shown has bent edges at the top and bottom of the split front frame 61. The top protective part 613 can better fix the LCD panel 50 after being pressed together with the LCD panel 50. The top protective part 613 covers the binding part for protection, and this setting makes the appearance of the display module flatter.

[0112] In an optional embodiment, the liquid crystal panel 50 has a side-bonded structure, and the surface of the liquid crystal panel 50 near the second outer frame portion 611 is bonded to the bonding portion of the display module.

[0113] In this embodiment, side bonding involves bonding the driver chip to the side of the LCD panel 50, thereby reducing the bezel width and improving display quality and aesthetics. This bonding method reduces the component layout on the front area, lowers the failure rate during production, and improves product yield. Due to the shorter signal line length and lower signal voltage drop, display uniformity is improved.

[0114] In an optional embodiment, in the first direction from the back plate 10 to the liquid crystal panel 50, the height of the second outer frame portion 611 at the location of the bonding portion is higher than the height between the surface of the liquid crystal panel 50 away from the back plate 10 and the back plate 10. That is, in this embodiment, the second outer frame portion 611 covers the bonding portion provided on the side for protection. For example, as... Figure 7 As shown, the top of the second outer frame portion 611 is slightly higher than the liquid crystal panel 50, for example, by 0.1 mm, to facilitate the application of the ink layer 96 and the fourth adhesive layer 94.

[0115] In this embodiment, the second outer frame portion 611 covers the bonding portion perpendicular to the surface of the back plate 10 to protect the bonding portion. The second bottom frame portion 612 covers the first protrusion 3111 of the first outer frame portion 311 and the surface of the back plate 10 away from the light source 20, forming a bent integral structure of the second bottom frame portion 612 and the second outer frame portion 611. That is, the display module of this embodiment is... Figure 9 The “L-shaped” front frame shown has a bent edge at the bottom of the split front frame 61, which wraps around the first bottom frame 312 of the split middle frame 31 and part of the back plate 10. This ensures a sturdy structure and prevents dust and moisture from entering the display module.

[0116] based on Figure 8 The C-shaped split front frame 61 shown can be sprayed by tilting the nozzle of the automated glue coating equipment at 45° during the manufacturing process. This ensures that the gap between the second outer frame 611 of the split front frame 61 and the LCD panel 50 is filled, thus guaranteeing the sealing performance and also blocking light leakage through narrow gaps at wide viewing angles.

[0117] based on Figure 9 The L-shaped front frame structure shown can be manufactured by setting the nozzle of the automated adhesive coating equipment to 90° vertical for spraying, ensuring that the gap between the second outer frame 611 of the split front frame 61 and the LCD panel 50 is filled to guarantee sealing performance.

[0118] Based on the above Figure 8 and Figure 9 In addition to the structural design of the metal front frame on the bonding side, this embodiment also designs the structure of the metal front frame on the non-bonding side.

[0119] In an optional embodiment, in the first direction from the back plate 10 to the liquid crystal panel 50, the height of the second outer frame portion 611 of the split front frame 61 at the location of the non-bonding structure is higher than the height between the surface of the liquid crystal panel 50 away from the back plate 10 and the back plate 10. That is, in this embodiment, for the design of the split front frame 61 on the non-bonding side, the height of the second outer frame portion 611 is also slightly higher than the top surface of the liquid crystal panel 50, which facilitates the application of the ink layer 96 and the fourth adhesive layer 94.

[0120] In an optional embodiment, the second outer frame portion 611 of the split front frame 61 at the location of the unbonded structure covers at least a portion of the first outer frame portion 311 of the corresponding side. That is, in this embodiment, the split front frame 61 on the unbonded side may not completely cover the first outer frame portion 311 of the entire split middle frame 31, thereby reducing manufacturing costs.

[0121] In an optional embodiment, such as Figure 10 As shown, the second outer frame portion 611 and the second bottom frame portion 612 of the split front frame 61 at the location of the non-bonded structure are split structures, and the surface of the first outer frame portion 311 not covered by the second outer frame portion 611 is exposed between the second outer frame portion 611 and the second bottom frame portion 612.

[0122] The second outer frame portion 611 is fixed to the first outer frame portion 311 at the corresponding position, and the second bottom frame portion 612 is fixed to the first protrusion 3111 of the first outer frame portion 311 at the corresponding position, for example, by connecting and fixing with screws, thereby ensuring the strength of the module.

[0123] In this embodiment, as Figure 10 As shown, the split front frame 61 reduces the area of ​​the second outer frame portion 611 on the non-bonding side, utilizing the exposed outer surface of the first outer frame portion 311 as the appearance surface of the display module. Furthermore, the appearance surface of the display module can be covered with a highly waterproof tape 98, for example... Figure 1 Waterproof tape 98 is attached to the outside of the split front frame 61 shown to further prevent dust and other contaminants from entering the cavity of the display module.

[0124] In an optional embodiment, such as Figure 11 As shown, the display module also includes a reinforcing rib 97 disposed on the non-light-emitting side of the display module. One end of the reinforcing rib 97 is fixed to the split front frame 61, and the other end is fixed to the split front frame 61 or the split middle frame 31 at the opposite side.

[0125] In this embodiment, the split front frame 61 is fixed to the split front frame 61 or the split middle frame 31 using screw holes or rivet posts to fix the external vertical reinforcing rib 97. The reinforcing rib 97 can be fitted with structural components such as handles or back covers to improve the overall strength and portability of the display module.

[0126] The overall assembly process of the display module in this embodiment is as follows:

[0127] Two spraying machines can be used to assemble one display module by changing the spray nozzles and using an automated program; alternatively, four machines can be used in tandem to complete the module assembly on a single production line. The specific operation is as follows:

[0128] 1. Pre-line material preparation: Place each segment of the annular frame 30, 31, into the frame fixture and screw them in to form the annular frame 30. A reflective sheet is attached to the side wall of the first inner frame portion 313 inside the annular frame 30 to improve the display effect. Place the LCD panel 50 individually into the automated equipment. Apply ink layer 96 to the end of the LCD panel 50 on the light-emitting side. After application, place the LCD panel 50 on the fixture to check for light leakage.

[0129] 2. Light panel assembly: The back plate 10 is placed in the bonding equipment → the dispensing machine executes the command to spray the first adhesive layer 91 according to the set program → UV lamp irradiation → the robotic arm grabs the light source 20 light panel → the edge of the back plate 10 is grabbed to align and bond the light source 20 and the back plate 10.

[0130] 3. Assemble the reflector on the back plate 10: Place the reflector on the back plate 10 according to the alignment of the reflector with the opening of the light source 20.

[0131] 4. Assembly of the annular frame 30 and the back plate 10: The dispensing machine executes the command to spray the fourth adhesive layer 94 according to the set program → UV lamp irradiation → the robotic arm grabs the complete annular frame 30 and places it above the back plate 10 → the edge of the back plate 10 is grabbed and aligned with the annular frame 30 → pressure is maintained and left to stand for 2 hours to form the backlight module.

[0132] 5. Optical film 40: The backlight module is transferred to the next dispensing and fixing equipment → the dispensing machine applies the second adhesive layer 92 and then irradiates it with a UV lamp → the suction cup adsorbs the optical film 40 and moves it above the backlight module → the frame position of the backlight module is grasped and the optical film 40 and the bearing part 3131 of the first inner frame 313 are aligned and bonded → pressure is maintained and left to stand for 2 hours.

[0133] 6. LCD panel 50 bonding: The backlight module and optical film 40 are transferred and then placed in the dispensing and fixing equipment → the dispensing machine applies the third adhesive layer 93 and then irradiates with UV lamp → the suction cup adsorbs the LCD panel 50 and moves it above the backlight module → the edge of the optical film 40 is grasped and aligned with the LCD panel 50 for bonding → pressure is maintained and it is left to stand for 2 hours.

[0134] 7. Annular front frame 60 locking: After being conveyed out by the conveyor equipment, the split front frames 61 at different edge positions are placed on the assembly table and assembled and fixed to the annular middle frame 30 by screws.

[0135] 8. Fourth adhesive layer 94 coating: Transfer the module to the last glue coating equipment → grab the edge position of the annular front frame 60 → apply the fourth adhesive layer 94 with the glue dispensing equipment and then irradiate with UV → let stand for 2 hours.

[0136] 9. Tape application: Place the display module on the workbench → completely wrap the module with waterproof tape 98 → manually press to ensure a smooth appearance → transfer to the outer packaging production line.

[0137] Based on the above process, this embodiment presents an outdoor display module. This module uses low-cost, high-stability glass-based Mini LEDs to replace the traditional LED strip light source 20 design, better meeting the high-brightness requirements of outdoor applications. The back panel 10 is made of glass, combined with a split mid-frame 31 structure and a fully laminated optical film 40 to form a complete backlight 20 cavity. Structurally, a split front frame 61 is used to fix the LCD panel 50 and the annular mid-frame 30. Regarding sealing performance, a fourth adhesive layer 94 fills the gap between the LCD panel 50 and the split front frame 61 at the top, while a first adhesive layer 91 fixes the back panel 10 and the split mid-frame 31 at the bottom. The split front frame 61 further encloses the module, ensuring waterproof and dustproof performance. Therefore, this embodiment's display module can be used in outdoor environments and has wide applicability.

[0138] The second embodiment of this utility model proposes a display panel, which includes one or more display modules from the first embodiment of this utility model, thereby realizing a large-size splicing display panel design, suitable for large-size displays in outdoor environments, and further improving the scope of application.

[0139] The third embodiment of this utility model provides a display device, which includes the display panel described in the previous embodiments of this utility model. The display device can be any product or component with display function, such as outdoor billboards, public transportation display systems, concert stage screens, traffic information screens, digital signs, scenic area information screens, vehicle-mounted mobile advertisements, parking guidance screens, etc. This embodiment does not limit the scope of the application.

[0140] In the description of this utility model, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0141] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A display module, characterized in that, The display module includes a back plate, a light source located on the back plate, an annular middle frame, an optical film, a liquid crystal panel, and an annular front frame, wherein... The annular frame includes multiple split frames, each of which includes: a first outer frame portion perpendicular to the back plate, a first bottom frame portion overlapping at least part of the back plate, and a first inner frame portion facing the light source. The first inner frame portion of each split frame and the back plate form a cavity. The annular front frame includes a split front frame corresponding to each of the split middle frames. Each of the split front frames includes: a second outer frame portion that at least covers a portion of the first outer frame portion and a second bottom frame portion that at least covers a portion of the back plate at the position corresponding to the first bottom frame portion. The first inner frame portion includes a support portion located at an end position away from the back plate, and the optical film and the liquid crystal panel are located on the side of the support portion away from the back plate.

2. The display module according to claim 1, characterized in that, The first inner frame portion also includes a support portion perpendicular to the first bottom frame portion and a transition portion connecting the support portion and the load-bearing portion. The surface of the transition section facing the light source is an arc surface; or A reflective sheet is attached to the surface of one or all of the transition section, the support section, and the back plate facing the light source.

3. The display module according to claim 2, characterized in that, The first outer frame portion, the first bottom frame portion, and the first inner frame portion form a middle frame cavity; Adjacent split frames are connected by a connecting structure, the connecting structure including: An insertion part that is inserted into the cavity of the middle frame of the adjacent split middle frame; and A connecting part that connects adjacent plug parts. The connecting part is made of a hard material, or the connecting part is made of a soft material.

4. The display module according to claim 1, characterized in that, The direction from the back plate to the liquid crystal panel is the first direction, and the direction opposite to the first direction is the second direction; The first outer frame portion includes: A first protrusion located near the back panel has a surface on the side away from the back panel that protrudes in the second direction than the surface on the side of the first bottom frame that is away from the back panel. A groove is formed between the first protrusion and the first bottom frame. The back plate extends into the tank. One or more locations between the back plate and the first protrusion or between the back plate and the first bottom frame are filled with a first adhesive layer.

5. The display module according to claim 4, characterized in that, The display module also includes: The ink layer is located on the surface of the liquid crystal panel at the end position, away from the back plate. The second adhesive layer is located on the top surface of the support portion away from the back plate, and fixes the support portion and the optical film. The third adhesive layer is located between the optical film and the liquid crystal panel, with the liquid crystal panel fixed to the side of the optical film away from the back plate. The fourth adhesive layer is located in the gap between the surface of the second outer frame portion facing the liquid crystal panel and the ink layer; The fifth adhesive layer is located between the back plate and the light source.

6. The display module according to claim 4, characterized in that, The liquid crystal panel has a front-side bonding structure, and the surface of the liquid crystal panel away from the back plate is bonded to the bonding part of the display module. The split front frame corresponding to the location of the bonding part also includes a protective part, the projection of the protective part onto the liquid crystal panel covers the projection of the bonding part onto the liquid crystal panel; In the first direction from the back plate to the liquid crystal panel, the second outer frame portion corresponding to the location of the bonding portion completely covers the first outer frame portion; The second bottom frame covers the first protrusion of the first outer frame and the surface of the back plate away from the light source.

7. The display module according to claim 4, characterized in that, The liquid crystal panel has a side-bonded structure, and the surface of the liquid crystal panel near the second outer frame is bonded to the bonding part of the display module. In the first direction from the back plate to the liquid crystal panel, the height of the second outer frame portion corresponding to the location of the bonding portion is higher than the height between the surface of the liquid crystal panel away from the back plate and the back plate. The second outer frame portion covers the bonding portion on a surface perpendicular to the back plate. The second bottom frame portion covers the first protrusion of the first outer frame portion and the surface of the back plate away from the light source, to form an integral structure of the bent second bottom frame portion and the second outer frame portion.

8. The display module according to any one of claims 6 or 7, characterized in that, In the first direction from the back panel to the liquid crystal panel The height of the second outer frame portion of the split front frame at the location of the non-bonded structure is higher than the height between the surface of the liquid crystal panel away from the back panel and the back panel. The second outer frame portion of the split front frame at the location of the non-bonded structure covers a portion of the first outer frame portion corresponding to the edge.

9. The display module according to claim 8, characterized in that, The second outer frame and the second bottom frame at the location of the non-bonded structure are separate structures, with the surface of the first outer frame not covered by the second outer frame exposed between the second outer frame and the second bottom frame. The second outer frame portion is fixed to the first outer frame portion at the corresponding position; The second bottom frame portion is fixed to the first bottom frame portion at the corresponding position.

10. The display module according to claim 1, characterized in that, The light source is a direct-lit sub-millimeter light-emitting diode (LED) light source. or The display module also includes a reinforcing rib disposed on the non-light-emitting side of the display module. One end of the reinforcing rib is fixed to the split front frame, and the other end is fixed to the split front frame or the split middle frame at the opposite side.

11. A display panel, characterized in that, The display panel includes one or more display modules as described in any one of claims 1 to 10.

12. A display device, characterized in that, The display device includes the display panel as described in claim 11.

Images