Substrate and display panel

Abstract

The utility model relates to the technical field of display panels, and discloses a substrate and a display panel, a plurality of lamp bead bonding pad groups are arranged on the substrate, and any lamp bead bonding pad group comprises a plurality of lamp bead bonding pads; the substrate is also provided with a plurality of positioning mark points, and the positioning mark points are arranged in an area where the lamp bead bonding pad group is located; and all the positioning mark points arranged on the substrate are not distributed in a central symmetry manner relative to the central point of the substrate. According to the display panel, the positioning mark points are arranged in the area where the lamp bead bonding pad set is located, after the lamp beads are pasted on the substrate, the lamp beads can shield and hide the positioning mark points, the appearance consistency of the display panel is improved, and the display effect is improved; meanwhile, the positioning mark points are not symmetrically distributed about the center of the central point of the substrate, so that the risk of chip mounting errors caused by reverse placement of the substrate is effectively avoided, and the process yield is improved.

Description

Technical Field

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

[0002] The consistency of the appearance of an LED display panel is one of the important indicators for evaluating its performance, especially in the mid-to-high-end small-pitch LED display panel industry. From the user's perspective, not only is a good display effect required, but also good appearance consistency.

[0003] The existing PCB (Printed Circuit Board) substrate of small-pitch LED display panels requires the setting of positioning marks. Positioning marks (also known as Mark points) are the position identification points of the substrate on the automatic placement machine in the circuit board design. They can be used for alignment in printing, placement and other processes. However, since the positioning marks are exposed between the LED chips after placement, they cannot be covered even after GOB (Glue on Board) encapsulation, which affects the appearance consistency of the LED display panel and the display effect is poor. At the same time, the positioning marks of the existing display panels are designed with a central symmetrical distribution. When the substrate is placed upside down, the placement equipment cannot identify it, which poses a risk of placement error and affects the process yield. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a substrate and a display panel. By setting the positioning marks in the area where the lamp bead pads are located, the lamp beads can cover and hide the positioning marks after the substrate is completed for lamp bead mounting, which improves the appearance consistency of the display panel and enhances the display effect. At the same time, the positioning marks are not symmetrically distributed with respect to the center point of the substrate, which effectively avoids the risk of mounting errors due to the substrate being placed backwards and improves the process yield.

[0005] This utility model provides a substrate on which a plurality of lamp bead pad groups are disposed, wherein any one of the lamp bead pad groups includes a plurality of lamp bead pads.

[0006] The substrate is also provided with a number of positioning marks, which are located in the area where the lamp bead pad group is located;

[0007] All positioning markers set on the substrate are not symmetrically distributed with respect to the center point of the substrate.

[0008] Furthermore, the positioning markers are set in the gaps between several lamp pads in the same lamp pad group.

[0009] Further, a safety spacing exists between any one of the positioning mark points and the lamp bead pad.

[0010] Further, the safety spacing is greater than 50 um.

[0011] Further, the positioning mark points are in the shape of a cross, a triangle, a circle, a rectangle, or a diamond.

[0012] Further, the positioning mark points are disposed in a first lamp bead pad of the lamp bead pad group, and the first lamp bead pad is a special-shaped pad.

[0013] Further, the first lamp bead pad is in the shape of a circle.

[0014] Further, the number of the positioning mark points is at least three.

[0015] Further, the positioning mark points are integrally formed with the lamp bead pad.

[0016] The utility model also provides a display panel, the display panel includes above -mentioned substrate and lamp pearl, the lamp pearl sets up on the lamp pearl pad group of substrate, the lamp pearl hides the positioning mark point.

[0017] The utility model provides a kind of substrate and display panel, by positioning mark point is set in the area where lamp bead pad group is located on substrate, when substrate completes lamp pearl patching, lamp pearl can hide positioning mark point, positioning mark point cannot be directly seen from lamp surface, improve the appearance consistency of display panel, improve display effect;While the setting position of positioning mark point is not with the center point of substrate central symmetry distribution, prevent when substrate is placed reversely, since positioning mark point position is same, patching equipment cannot identify the abnormal situation of substrate placed reversely according to positioning mark point position, avoid the risk of patching mistake, improve process yield. ACCURACY OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the schematic diagram of substrate structure in the embodiment one of the utility model;

[0020] Figure 2 It is Figure 1 the enlarged schematic diagram of a in

[0021] Figure 3 This is a schematic diagram of the substrate structure in Embodiment 2 of this utility model;

[0022] Figure 4 yes Figure 3 Enlarged view of point b in the middle;

[0023] Figure 5 This is a schematic diagram of the display panel structure in Embodiment 3 of this utility model. Detailed Implementation

[0024] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] In this invention, it should be understood that terms such as “comprising” or “having” are intended to indicate the presence of features, figures, steps, actions, components, portions or combinations thereof disclosed in this specification, and are not intended to exclude the possibility of the presence or addition of one or more other features, figures, steps, actions, components, portions or combinations thereof.

[0026] It should also be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] Embodiment 1 of this utility model provides a substrate on which a plurality of lamp bead pad groups are provided, and any one of the lamp bead pad groups includes a plurality of lamp bead pads.

[0029] The substrate is also provided with a number of positioning marks, which are located in the area where the lamp bead pad group is located;

[0030] All positioning markers set on the substrate are not symmetrically distributed with respect to the center point of the substrate.

[0031] In one optional implementation of this embodiment, such as Figure 1 As shown, Figure 1 The diagram shows a schematic of the substrate structure in Embodiment 1 of the present invention. The substrate 1 is provided with 12*10 LED chip pad groups 2 arranged in an array. Each LED chip pad group 2 includes four LED chip pads 3 arranged in a central ring.

[0032] Specifically, the LED chip pad groups 2 on the substrate 1 are arranged in an array, and each LED chip pad group 2 can be used to surface mount and solder one LED chip.

[0033] Furthermore, the number of lamp chip pads 3 included in the lamp chip pad group 2 is determined according to actual design requirements.

[0034] In an optional implementation of this embodiment, four positioning marks 4 are also provided on the substrate 1, and the positioning marks 4 are all located in the area where the lamp bead pad group 2 is located.

[0035] Furthermore, the positioning mark point 4 is set in the gap between several lamp bead pads in the same lamp bead pad group.

[0036] Specifically, such as Figure 2 As shown, Figure 2 for Figure 1 The enlarged schematic diagram at point a shows one of the positioning marks and the corresponding LED chip pad group. The positioning mark 4 is located in the gap between the four LED chip pads 3 of the LED chip pad group 2.

[0037] This section considers the traditional LED display panel substrate where the positioning marks are located between the LED chip pad groups. After the LED chips are mounted, these marks are exposed between the chips, and even after GOB encapsulation, they cannot be covered, affecting the appearance consistency of the LED display panel and resulting in poor display quality. Traditional solutions to this problem are: 1. Using darker adhesive for GOB encapsulation; 2. Covering the positioning marks with black adhesive after LED chip mounting before GOB encapsulation. Both methods can cover the positioning marks to some extent and improve appearance consistency. However, the black adhesive in method 1 affects light emission, reducing the overall screen brightness and impacting display quality. Method 2 is more difficult to implement, requiring additional steps and increasing costs. Furthermore, the capillary effect of the black adhesive can cause it to adhere to the sides of the LED chips next to the positioning marks, affecting light emission.

[0038] Therefore, in this embodiment, the positioning mark is set in the area where the LED pad group is located, specifically in the central surrounding area of ​​the LED pad group. After the LED is mounted, the LED can cover the positioning mark, forming a hidden effect, which improves the appearance consistency of the display panel and enhances the display effect.

[0039] In an optional implementation of this embodiment, all the positioning markers 4 set on the substrate 1 are not symmetrically distributed with respect to the center point of the substrate 1.

[0040] Specifically, such as Figure 1As shown, the coordinates of the lamp bead pad group 2 corresponding to the positions of the four positioning mark points 4 arranged on the substrate 1 are (3, 2), (10, 2), (2, 9), and (11, 9) respectively, that is, the four positioning mark points 4 are not distributed in a central symmetry with the center point of the substrate 1 as the center.

[0041] Here, it is considered that the positions of the positioning mark points on the substrate of the traditional LED display panel are arranged in a central symmetry, and when the substrate is placed upside down by 180°, the positions of the positioning mark points are visually unchanged, so that the patch equipment cannot identify the abnormal situation of the substrate being placed upside down, and there is a risk of patching failure, which affects the process yield.

[0042] Therefore, in the embodiment, the positioning mark points 4 are not arranged in a central symmetry with the center point of the substrate 1 as the center, and when the substrate is placed upside down, there is a large difference in the positions of the positioning mark points, so that the patch equipment can identify the abnormal situation of the substrate being placed upside down, and the risk of patching failure caused by the substrate being placed upside down can be effectively avoided, and the process yield is improved.

[0043] In an optional implementation manner of the embodiment, the positioning mark points and the lamp bead pads are integrally formed.

[0044] Specifically, the positioning mark points and the metal layer of the lamp bead pads are integrally formed.

[0045] Further, the positioning mark points are metal layers.

[0046] Here, it is considered that the metal layer of the positioning mark points and the metal layer of the lamp bead pads are integrally formed, and there is no need to design an additional process to form the positioning mark points, thereby reducing the process difficulty.

[0047] In an optional implementation manner of the embodiment, there is a safety distance between any one of the positioning mark points and the lamp bead pad.

[0048] Specifically, an insulating safety distance is required between the positioning mark points and the adjacent lamp bead pads, so as to ensure that the positioning mark points do not affect the electrical connection between the lamp bead pads and the lamp beads.

[0049] Further, the safety distance is greater than 50 um, which can be one of 50 um, 60 um, 70 um, 80 um, 90 um, and 100 um, and is set according to actual design requirements.

[0050] In an optional implementation manner of the embodiment, the shape of the positioning mark points is a cross, a triangle, a circle, a rectangle, or a rhombus.

[0051] Specifically, in the embodiment, the shape of the positioning mark points is a cross, and the shape of the positioning mark points is set according to actual design requirements.

[0052] In an optional implementation of the embodiment, the number of the positioning mark points is at least three.

[0053] Specifically, considering the positioning accuracy during patching, the number of the positioning mark points is at least three, and in the embodiment, the number of the positioning mark points is set to four.

[0054] In summary, the embodiment one of the utility model provides a kind of substrate, by positioning mark point is set in the area where lamp bead pad group is located on substrate, when substrate completes lamp bead patching, lamp bead can hide positioning mark point, and positioning mark point cannot be directly seen from lamp surface, improve the appearance consistency of display panel, improve display effect;While the setting position of positioning mark point is not with the center point of substrate central symmetry distribution, prevent when substrate is placed upside down, due to the same position of positioning mark point, patching equipment cannot identify the abnormal situation of substrate placed upside down according to the position of positioning mark point, avoid the risk of patching failure, improve process yield.

[0055] Embodiment two

[0056] The embodiment two of the utility model provides a kind of substrate, be provided with a plurality of lamp bead pad groups on the substrate, any one lamp bead pad group includes a plurality of lamp bead pads;

[0057] A plurality of positioning mark points are further provided on the substrate, and the positioning mark points are arranged in the area where the lamp bead pad group is located.

[0058] All positioning mark points arranged on the substrate are not distributed in central symmetry with the center point of the substrate.

[0059] In an optional implementation of the embodiment, as shown in Figure 3 As shown in Figure 3 The structure schematic diagram of the substrate in the embodiment two of the utility model is shown, and the substrate is provided with 12*10 lamp bead pad groups 2 arranged in array, and any one lamp bead pad group 2 includes four lamp bead pads 3 arranged around the center.

[0060] Specifically, the lamp bead pad groups 2 arranged on the substrate 1 are arranged in array, and each lamp bead pad group 2 can correspond to patching and welding one lamp bead.

[0061] Further, the number of the lamp bead pads 3 included in the lamp bead pad group 2 is determined according to actual design requirements.

[0062] In an optional implementation of the embodiment, the substrate 1 is further provided with four positioning mark points, and the positioning mark points are all arranged in the area where the lamp bead pad group 2 is located.

[0063] Further, the positioning mark point is arranged in a first lamp bead pad of the lamp bead pad group, and the first lamp bead pad is a special-shaped pad.

[0064] Specifically, as shown in FIG. 2, Figure 4 Figure 4 As shown in FIG. 2, Figure 3 FIG. 2 is an enlarged schematic view of a position b in FIG. 1, showing a lamp bead pad group corresponding to a positioning mark point arranged at the position, the positioning mark point is arranged in a first lamp bead pad 31 of the lamp bead pad group 2, and the first lamp bead pad 31 is a special-shaped pad.

[0065] Further, the first lamp bead pad 31 is circular in shape.

[0066] Specifically, here, the first lamp bead pad 31 is arranged as a special-shaped pad, which is different from the rectangular pads of other lamp bead pads in the same lamp bead pad group, and the special-shaped pad is used as a positioning mark point. Since the position of the special-shaped pad as the positioning mark point is still arranged in the lamp bead pad group, after the lamp beads are pasted, the lamp beads can shield the special-shaped pad, and the same hidden effect is formed, the appearance consistency of the display panel is improved, and the display effect is improved.

[0067] In an optional implementation of the embodiment, all the positioning mark points arranged on the substrate 1 are not distributed in a central symmetry with the center point of the substrate 1 as the center.

[0068] Specifically, as shown in FIG. 2, Figure 3 As shown in FIG. 2, the coordinates of the lamp bead pad group 2 corresponding to the four first lamp bead pads 31 arranged on the substrate 1 as the positioning mark points are (3, 2), (10, 2), (2, 9), and (11, 9), that is, the four first lamp bead pads 31 are not distributed in a central symmetry with the center point of the substrate 1 as the center.

[0069] In an optional implementation of the embodiment, the number of the positioning mark points is at least three.

[0070] Specifically, the number of the first lamp bead pads 31 as the positioning mark points is at least three.

[0071] In summary, the second embodiment of the utility model provides a substrate, by arranging the first lamp bead pad as a special-shaped pad as the positioning mark point, when the substrate is completed lamp bead pasting, the lamp bead can shield the positioning mark point, the positioning mark point cannot be directly seen from the lamp surface, the appearance consistency of the display panel is improved, and the display effect is improved. Meanwhile, the arrangement position of the positioning mark point is not distributed in a central symmetry with the center point of the substrate as the center, so that when the substrate is placed reversely, since the positions of the positioning mark points are the same, the pasting equipment cannot identify the abnormal condition of the reversely placed substrate according to the positions of the positioning mark points, the risk of pasting failure is avoided, and the process yield is improved. ​

[0072] Embodiment three

[0073] The display panel provided in the embodiment three of the utility model has the advantages that the display panel comprises the substrate in the embodiment one or the embodiment two, the first lamp bead pad shaped as a special-shaped pad is arranged as the positioning mark point, the lamp bead can hide the positioning mark point after the substrate is completed with the lamp bead patching, the positioning mark point cannot be directly seen from the lamp surface, the appearance consistency of the display panel is improved, and the display effect is improved; meanwhile, the positioning mark points are not arranged in the center point center symmetry of the substrate, the abnormal situation of the substrate being placed reversely cannot be recognized by the patching equipment according to the positioning mark point position due to the same positioning mark point position when the substrate is placed reversely, the risk of patching failure is avoided, and the process yield is improved.

[0074] In an optional implementation of the embodiment, as shown in Figure 5 Figure 5 The display panel structure schematic diagram in the embodiment three of the utility model is shown, the display panel comprises the substrate 1 in the embodiment one, and a plurality of lamp beads 5 arranged on the substrate 1, the plurality of lamp beads 5 are arranged on the lamp bead pad group of the substrate 1, and hide the positioning mark points arranged on the substrate 1.

[0075] In summary, the display panel provided in the embodiment three of the utility model comprises the substrate in the embodiment one or the embodiment two, the first lamp bead pad shaped as a special-shaped pad is arranged as the positioning mark point, the lamp bead can hide the positioning mark point after the substrate is completed with the lamp bead patching, the positioning mark point cannot be directly seen from the lamp surface, the appearance consistency of the display panel is improved, and the display effect is improved; meanwhile, the positioning mark points are not arranged in the center point center symmetry of the substrate, the abnormal situation of the substrate being placed reversely cannot be recognized by the patching equipment according to the positioning mark point position due to the same positioning mark point position when the substrate is placed reversely, the risk of patching failure is avoided, and the process yield is improved.

[0076] The utility model provides a kind of substrate and display panel provided in the embodiment of the utility model are introduced in detail, specific examples are used in this paper to the principle and implementation mode of the utility model are described, the above embodiment is only used to help understand the method of the utility model and its core idea;Meanwhile, for the general technical personnel of the field, according to the idea of the utility model, there will be changes in specific implementation mode and application range, and the content of the specification should not be understood as the limitation of the utility model.​

Claims

1. A substrate, characterized by, The substrate is provided with a plurality of lamp bead pad groups, and any one of the lamp bead pad groups comprises a plurality of lamp bead pads; The substrate is further provided with a plurality of positioning mark points, and the positioning mark points are arranged in the area where the lamp bead pad groups are located; All the positioning mark points arranged on the substrate are not distributed in central symmetry with the center point of the substrate as the center.

2. The substrate of claim 1, wherein, The positioning mark points are arranged at the gaps between the plurality of lamp bead pads in the same lamp bead pad group.

3. The substrate of claim 2, wherein, There is a safety distance between any one of the positioning mark points and the lamp bead pad.

4. The substrate of claim 3, wherein, The safety distance is greater than 50 um.

5. The substrate of claim 2, wherein, The shape of the positioning mark point is a cross, a triangle, a circle, a rectangle or a diamond.

6. The substrate of claim 1, wherein, The positioning mark point is arranged in a first lamp bead pad of the lamp bead pad group, and the first lamp bead pad is a special-shaped pad.

7. The substrate of claim 6, wherein, The shape of the first lamp bead pad is a circle.

8. The substrate of claim 1, wherein, The number of the positioning mark points is at least three.

9. The substrate of claim 1, wherein, The positioning mark point is integrally formed with the lamp bead pad.

10. A display panel, characterized by, The display panel comprises the substrate and the lamp bead according to any one of claims 1-9, the lamp bead is arranged on the lamp bead pad group of the substrate, and the lamp bead shields and hides the positioning mark point.

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