Display module and display device

Abstract

The utility model provides a kind of display module and display device, display module includes: module substrate;Multiple LED lamp beads, interval setting is in the front side of module substrate, each LED lamp bead includes lamp bead substrate, encapsulation layer and multiple LED chips, multiple LED chips interval setting is in the front side of lamp bead substrate, encapsulation layer is set in the front side of lamp bead substrate and encapsulates multiple LED chips, and encapsulation layer covers all front surface of lamp bead substrate.The technical scheme of the application effectively solves the problem of poor static display consistency of LED display device in related art.

Description

Technical Field

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

[0002] With the continuous advancement of LED display technology, its application scope is expanding, from outdoor advertising screens to indoor high-definition displays. LED displays have become an important tool for information transmission and visual presentation. However, as the display pitch continues to shrink, the distance between the LED display and the viewer is also decreasing. The closer the distance, the easier it is for the viewer to observe color differences on the display surface, making the issue of static display consistency increasingly prominent.

[0003] LED display devices in related technologies include a module substrate and multiple LED chips disposed on the front side of the module substrate. The multiple LED chips emit different beams of light to form a display pattern. In related technologies, the surface of the module substrate without LED chips is exposed, allowing the viewer to observe it directly.

[0004] Because the module substrates in related technologies are large, it is difficult to control the processing precision and consistency of the module substrates. For example, when the ink layer thickness on the surface of the module substrate is inconsistent, or when different batches of module substrates are spliced ​​together, the display consistency of the module substrates exposed on the outside is poor, resulting in poor static display consistency of the LED display device. Utility Model Content

[0005] The main objective of this invention is to provide a display module and display device to solve the problem of poor static display consistency in LED display devices in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a display module is provided, comprising: a module substrate; a plurality of LED beads spaced apart on the front side of the module substrate, each LED bead including a bead substrate, an encapsulation layer and a plurality of LED chips, the plurality of LED chips being spaced apart on the front side of the bead substrate, the encapsulation layer being disposed on the front side of the bead substrate and encapsulating the plurality of LED chips, and the encapsulation layer covering the entire front surface of the bead substrate.

[0007] Furthermore, each LED chip has a separate chip substrate and encapsulation layer.

[0008] Furthermore, the surface area of ​​the front surface of the module substrate is S1, and the total surface area of ​​the front surfaces of the multiple LED substrates is S2. The ratio of S2 to S1 satisfies: 80%≤S2 / S1≤90%.

[0009] Furthermore, there is a maintenance spacing A between two adjacent LED beads, and the maintenance spacing A satisfies: 0.1mm≤A≤0.3mm.

[0010] Furthermore, two adjacent LED beads are spaced apart along a first preset direction to form a maintenance spacing A. The center line of the LED chip and the side edge of the LED bead substrate are both perpendicular to the first preset direction. The minimum distance between the center line of the LED chip and the side edge of the LED bead substrate is B. The relationship between the maintenance spacing A and the minimum distance B satisfies: A≤B.

[0011] Furthermore, the minimum distance B between the centerline of the LED chip and the side edge of the lamp bead substrate satisfies: B≥0.5mm.

[0012] Furthermore, at least two of the plurality of LED chips are spaced apart on the same LED substrate along a first preset direction, and two adjacent LED chips arranged on the same LED substrate along the first preset direction have a first spacing C between them; at least a portion of the plurality of LED chips are spaced apart along the first preset direction, and two adjacent LED substrates arranged along the first preset direction are a first substrate and a second substrate, and the LED chips on the first substrate and the LED chips on the second substrate have a minimum spacing D along the first preset direction, and the first spacing C is equal to the minimum spacing D.

[0013] Furthermore, two adjacent LED beads are spaced apart along a first preset direction to form a maintenance spacing A. The LED bead substrate has a side length L along the first preset direction. Each LED bead has n LED chips spaced apart along the first preset direction. Each LED chip has a side length l along the first preset direction. The relationship between the maintenance spacing A, the first spacing C, the side length L, n, and the side length l satisfies: L = (C + l) * n - A.

[0014] Furthermore, a portion of the multiple LED beads are spaced apart along a first preset direction, and another portion of the multiple LED beads are spaced apart along a second preset direction, the first preset direction being perpendicular to the second preset direction; and / or, within an LED bead, a portion of the multiple LED chips are spaced apart along a first preset direction, and another portion of the multiple LED chips are spaced apart along a second preset direction, the first preset direction being perpendicular to the second preset direction.

[0015] According to another aspect of the present invention, a display device is provided, including a display module, wherein the display module is the display module described above.

[0016] The present invention provides a display module comprising a module substrate and multiple LED beads. The multiple LED beads are spaced apart on the front side of the module substrate. Each LED bead includes a bead substrate, an encapsulation layer, and multiple LED chips. The multiple LED chips are also spaced apart on the front side of the bead substrate. The encapsulation layer is disposed on the front side of the bead substrate and encapsulates the multiple LED chips, covering the entire front surface of the bead substrate. This arrangement of the bead substrate and multiple LED chips allows the LED beads to cover more of the module substrate, reducing the exposed area of ​​the module substrate. This minimizes the exposed area of ​​the module substrate with poor processing precision, reducing the impact of uneven surface texture or inconsistent ink layer thickness on the display effect, thereby improving the static display consistency of the LED display device. Furthermore, the encapsulation layer covers the front surface of the bead substrate, further improving the display consistency of the bead substrate and thus enhancing the static display consistency of the LED display device. Therefore, the present invention effectively solves the problem of poor static display consistency in related technologies for LED display devices. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A front view of an embodiment of the display module according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 A partial front view of the display module;

[0020] Figure 3 The light distribution curve of the display module according to this utility model is shown when B equals 0.517875mm;

[0021] Figure 4 The light distribution curves of the display module when B equals 0.267875 mm are shown in other embodiments.

[0022] The above figures include the following reference numerals:

[0023] 10. Module substrate;

[0024] 20. LED beads; 21. Bead substrate; 22. LED chip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the display module includes a module substrate 10 and a plurality of LED beads 20. The plurality of LED beads 20 are spaced apart on the front side of the module substrate 10. Each LED bead 20 includes a bead substrate 21, an encapsulation layer, and a plurality of LED chips 22. The plurality of LED chips 22 are spaced apart on the front side of the bead substrate 21. The encapsulation layer is disposed on the front side of the bead substrate 21 and encapsulates the plurality of LED chips 22, and the encapsulation layer covers the entire front surface of the bead substrate 21.

[0029] In this way, by arranging the lamp bead substrate 21 and multiple LED chips 22, the LED lamp beads 20 can cover more of the module substrate 10, thereby reducing the area of ​​the module substrate 10 exposed on the outside. This results in less exposed area of ​​the module substrate 10 with poor processing precision, reducing the impact of uneven surface or inconsistent ink layer thickness on the display effect, and thus improving the static display consistency of the LED display device. Furthermore, the encapsulation layer allows the entire front surface of the lamp bead substrate 21 to be covered by the encapsulation layer, improving the display consistency of the lamp bead substrate 21, and further improving the static display consistency of the LED display device. Therefore, the technical solution of this application effectively solves the problem of poor static display consistency in LED display devices in related technologies.

[0030] In this embodiment, the LED chip 22 includes three LED light-emitting chips that emit red, green, and blue light, respectively. The encapsulation layer has a certain black color, which allows the encapsulation layer to optimize the appearance consistency of the LED substrate 21 and improve the static display consistency of the LED display device. The encapsulation layer is formed using a compression molding process, which is a process of placing preheated plastic material into a heated mold and then applying pressure to shape it. Encapsulation layers formed using this process have better display consistency.

[0031] Furthermore, each LED chip 20 has only one LED substrate 21 and one encapsulation layer. Designing each LED chip 20 to have only one LED substrate 21 and one encapsulation layer simplifies the manufacturing process, facilitates automated encapsulation of LED chips 20 in mass production, reduces production costs, and also improves the structural stability and reliability of the LED chips 20. Moreover, compared to setting multiple encapsulation layers on a single LED substrate 21, where multiple encapsulation layers correspond one-to-one with multiple LED chips 22, the technical solution of this embodiment can increase the coverage area of ​​the encapsulation layer on the LED substrate 21, thereby improving the static display consistency of the LED chips 20.

[0032] like Figure 1 and Figure 2 As shown, the surface area of ​​the front surface of the module substrate 10 is S1, and the total surface area of ​​the front surfaces of the multiple LED substrates 21 is S2. The ratio of S2 to S1 satisfies: 80% ≤ S2 / S1 ≤ 90%. By controlling the ratio of the surface area S1 of the front surface of the module substrate 10 to the total surface area S2 of the front surfaces of the multiple LED substrates 21 to between 80% and 90%, it is possible to ensure that most areas of the module substrate 10 are covered by the LED substrates 21, thereby reducing the negative impact of the module substrate 10 on the consistency of static display, and also reducing the processing precision requirements of the module substrate 10, thus reducing production costs.

[0033] Preferably, S2 / S1 is 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or 90%.

[0034] like Figure 1 and Figure 2 As shown, there is a maintenance gap A between two adjacent LED beads 20, which satisfies the condition: 0.1mm ≤ A ≤ 0.3mm. Limiting the maintenance gap A to 0.1mm to 0.3mm ensures sufficient space between adjacent LED beads 20 for inserting maintenance tools, facilitating maintenance and replacement, while avoiding excessive exposure of the module substrate 10 due to an excessively large maintenance gap A, which could affect the static display consistency. The lower limit of the maintenance gap A facilitates the insertion of maintenance tools, thus simplifying the maintenance and replacement of the LED beads 20. The upper limit of the maintenance gap A restricts the maximum distance between two adjacent LED beads 20, facilitating the covering of the module substrate 10 and improving the static display consistency of the display device.

[0035] Preferably, the maintenance spacing A is 0.1mm, 0.15mm, 0.20mm, 0.25mm or 0.30mm.

[0036] like Figure 1 and Figure 2 As shown, two adjacent LED beads 20 are spaced apart along a first preset direction to form a maintenance gap A. The center line of the LED chip 22 and the side edge of the LED bead substrate 21 are both perpendicular to the first preset direction. The minimum distance between the center line of the LED chip 22 and the side edge of the LED bead substrate 21 is B. The relationship between the maintenance gap A and the minimum distance B is: A≤B. By ensuring that the maintenance gap A does not exceed the minimum distance B between the center line of the LED chip 22 and the side edge of the LED bead substrate 21, the possibility of the viewer observing the maintenance gap can be further reduced, thereby weakening the negative impact of the module substrate 10 on the static display consistency and improving the static display consistency of the display device.

[0037] It should be noted that the minimum distance B between the center line of the LED chip 22 and the side edge of the lamp bead substrate 21 refers to the minimum distance between the center line of the LED chip 22 closest to the side edge of the lamp bead substrate 21 among multiple LED chips 22.

[0038] Figure 3 The graph shows the light distribution curve when the minimum distance B between the center line of LED chip 22 and the side edge of lamp bead substrate 21 is 0.517875 mm. The horizontal axis of the graph represents the viewing angle, and the vertical axis represents the normalized brightness. Figure 4In the graph, B equals 0.267875mm, representing the light distribution curve. The horizontal axis of the curve represents the viewing angle, and the vertical axis represents the normalized brightness. Figure 3 and Figure 4 It can be seen that, Figure 3 The display effect when B equals 0.517875mm is significantly better than... Figure 4 The display effect when B equals 0.267875mm. Due to the small emission angle of red light, the above design of the minimum distance B results in a better correction effect for red light, making the red light angle close to that of blue and green light, thus optimizing the display effect after the LED chip 22 is lit.

[0039] Specifically, Figure 3 The corresponding LED substrate 21 has a side length L of 2.6 mm along the first preset direction, and the first spacing C between two adjacent LED chips 22 disposed on the same LED substrate 21 along the first preset direction is 1.5 mm, and the negative electrodes of multiple LED chips 20 are connected in parallel.

[0040] Figure 3 The specific data corresponding to this are shown in the table below:

[0041]

[0042] Specifically, Figure 4 The corresponding LED substrate 21 has a side length L of 2.1 mm along the first preset direction, and the first spacing C between two adjacent LED chips 22 disposed on the same LED substrate 21 along the first preset direction is 1.5 mm, and the positive electrodes of multiple LED chips 20 are arranged in parallel.

[0043] Figure 4 The specific data corresponding to this are shown in the table below:

[0044]

[0045] like Figure 1 and Figure 2 As shown, the minimum distance B between the center line of LED chip 22 and the side edge of lamp bead substrate 21 satisfies: B ≥ 0.5 mm. Setting the minimum distance B to ≥ 0.5 mm effectively improves the color difference between the normal viewing angle and the wide viewing angle caused by the difference in the light emission angle between the LED flip-chip red light chip and the GB chip. This design takes into account the light emission characteristics of LED chip 22. By increasing the distance between the center line of LED chip 22 and the side edge of lamp bead substrate 21, it ensures uniform light distribution, improves the color consistency of the displayed image, and especially reduces color shift when viewed from different angles, thus enhancing the user experience.

[0046] Preferably, B is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1.0mm.

[0047] like Figure 1 and Figure 2 As shown, at least two of the plurality of LED chips 22 are spaced apart on the same LED substrate 21 along a first preset direction. Two adjacent LED chips 22 on the same LED substrate 21 along the first preset direction have a first spacing C between them. At least a portion of the plurality of LED beads 20 are spaced apart along the first preset direction. Two adjacent LED substrates 21 along the first preset direction are a first substrate and a second substrate. The LED chips 22 on the first substrate and the LED chips 22 on the second substrate have a minimum spacing D along the first preset direction. The first spacing C is equal to the minimum spacing D. By precisely controlling the first spacing C and the minimum spacing D, the distance between each LED chip 22 is ensured to be the same, that is, the distance between each pixel is the same, i.e., the display spacing is the same. This not only ensures the uniformity of the displayed image but also improves the overall display effect of the display device.

[0048] like Figure 1 and Figure 2 As shown, two adjacent LED beads 20 are spaced apart along a first preset direction to form a maintenance spacing A. The LED bead substrate 21 has a side length L along the first preset direction. Each LED bead 20 has n LED chips 22 spaced apart along the first preset direction, and each LED chip 22 has a side length l along the first preset direction. The relationship between the maintenance spacing A, the first spacing C, the side length L, n, and the side length l satisfies: L = (C + l) * n - A. The relationship between the maintenance spacing A, the first spacing C, the side length L, n, and the side length l ensures the scientific nature of the layout and size design of the LED beads 20, so that the number of LED chips 22 in each LED bead 20, the size of the LED chips 22, the size of the LED bead substrate 21, and the maintenance spacing between the LED beads 20 can be coordinated with each other. This not only meets the requirements of the display effect but also makes the display module design more reasonable and optimized.

[0049] like Figure 1 and Figure 2As shown, a portion of the multiple LED beads 20 are spaced apart along a first preset direction, and another portion of the multiple LED beads 20 are spaced apart along a second preset direction, the first preset direction being perpendicular to the second preset direction. Within one LED bead 20, a portion of the multiple LED chips 22 are spaced apart along the first preset direction, and another portion of the multiple LED chips 22 are spaced apart along the second preset direction, the first preset direction being perpendicular to the second preset direction. The spaced arrangement of the LED beads 20 and LED chips 22 in the mutually perpendicular first and second preset directions makes the layout of the display module more flexible and uniform. It can not only adapt to the display requirements of different shapes and sizes, but also ensure the consistency and uniformity of the displayed image in all directions, improving the overall display effect and user experience of the display device.

[0050] In other embodiments, a portion of the plurality of LED beads 20 are spaced apart along a first preset direction, and another portion of the plurality of LED beads 20 are spaced apart along a second preset direction, wherein the first preset direction is perpendicular to the second preset direction. Alternatively, within one LED bead 20, a portion of the plurality of LED chips 22 are spaced apart along a first preset direction, and another portion of the plurality of LED chips 22 are spaced apart along a second preset direction, wherein the first preset direction is perpendicular to the second preset direction.

[0051] This application also provides a display device, which includes a display module. The display module is the one described above. Since the above-described display module can solve the problem of poor static display consistency in LED display devices in the related art, the display device having this display module can solve the same technical problem.

[0052] The inventors discovered that, in related technologies, three methods are typically used to improve the static display consistency of LED display devices: differentiating the ink color grades of module substrates 10, inkjet printing on module substrates 10, and applying a film to module substrates 10. When differentiating the ink color grades of module substrates 10, the ink color grades are determined based on the similarity in appearance among multiple module substrates 10, and module substrates 10 with the same ink color grade are used in the same display device. However, this method of differentiating the ink color grades of module substrates 10 is only suitable for mass production. Because the quantity of the same ink color grade cannot be controlled, a large inventory is required, making it suitable only for rolling production with high demand. Inkjet printing on module substrates 10 requires inkjet printing on multiple module substrates 10 within the same project, on a project-by-project basis. However, when one or more module substrates 10 need to be replaced later, the newly replaced module substrate 10 still exhibits poor display consistency compared to the original module substrates 10 in the project. In particular, when applying film to the module substrate 10, the product stability is poor in the early stages, and the addition of materials and processes leads to high production costs.

[0053] The technical solution of this embodiment does not require any additional procedures, and can still ensure good static display consistency after maintenance and replacement, while also requiring less inventory.

[0054] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A display module, characterized in that, include: Module substrate (10); Multiple LED beads (20) are spaced apart on the front side of the module substrate (10). Each LED bead (20) includes a bead substrate (21), an encapsulation layer, and multiple LED chips (22). The multiple LED chips (22) are spaced apart on the front side of the bead substrate (21). The encapsulation layer is disposed on the front side of the bead substrate (21) and encapsulates the multiple LED chips (22). The encapsulation layer covers the entire front surface of the bead substrate (21).

2. The display module according to claim 1, characterized in that, Each of the LED beads (20) has one LED bead substrate (21) and one encapsulation layer.

3. The display module according to claim 1, characterized in that, The surface area of ​​the front surface of the module substrate (10) is S1, and the total surface area of ​​the front surfaces of the plurality of lamp bead substrates (21) is S2. The ratio of S2 to S1 satisfies: 80%≤S2 / S1≤90%.

4. The display module according to claim 1, characterized in that, There is a maintenance spacing A between two adjacent LED beads (20), and the maintenance spacing A satisfies: 0.1mm≤A≤0.3mm.

5. The display module according to claim 4, characterized in that, Two adjacent LED beads (20) are spaced apart along a first preset direction to form the maintenance spacing A. The center line of the LED chip (22) and the side edge of the LED bead substrate (21) are both perpendicular to the first preset direction. The minimum distance between the center line of the LED chip (22) and the side edge of the LED bead substrate (21) is B. The relationship between the maintenance spacing A and the minimum distance B is: A≤B.

6. The display module according to claim 5, characterized in that, The minimum distance B between the center line of the LED chip (22) and the side edge of the lamp bead substrate (21) satisfies: B≥0.5mm.

7. The display module according to claim 1, characterized in that, At least two of the plurality of LED chips (22) are spaced apart on the same lamp bead substrate (21) along a first preset direction, and the two LED chips (22) arranged adjacent to each other on the same lamp bead substrate (21) along the first preset direction have a first spacing C between them; at least a portion of the plurality of LED beads (20) are spaced apart along the first preset direction, and the two lamp bead substrates (21) arranged adjacent to each other along the first preset direction are a first substrate and a second substrate, and the LED chips (22) on the first substrate and the LED chips (22) on the second substrate have a minimum spacing D along the first preset direction, and the first spacing C is equal to the minimum spacing D.

8. The display module according to claim 7, characterized in that, Two adjacent LED beads (20) are spaced apart along the first preset direction to form a maintenance spacing A. The LED bead substrate (21) has a side length L along the first preset direction. Each LED bead (20) has n LED chips (22) spaced apart along the first preset direction. Each LED chip (22) has a side length l along the first preset direction. The relationship between the maintenance spacing A, the first spacing C, the side length L, n, and the side length l satisfies: L = (C + l) * n - A.

9. The display module according to claim 1, characterized in that, A portion of the plurality of LED beads (20) are spaced apart along a first preset direction, and another portion of the plurality of LED beads (20) are spaced apart along a second preset direction, wherein the first preset direction is perpendicular to the second preset direction; And / or, Within one of the LED beads (20), a portion of the plurality of LED chips (22) are spaced apart along a first preset direction, and another portion of the plurality of LED chips (22) are spaced apart along a second preset direction, wherein the first preset direction is perpendicular to the second preset direction.

10. A display device, comprising a display module, characterized in that, The display module is the display module according to any one of claims 1 to 9.

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