Array substrate and display device

Abstract

This application provides an array substrate and a display device, relating to the field of display technology. Its purpose is to at least alleviate the problem of poor frame curing caused by different pitches of metal traces in different metal layers in related technologies. The array substrate includes a substrate, a first metal layer, an insulating layer, and a second metal layer. The first metal layer is disposed on the substrate and includes multiple first traces located in the fan-out region and spaced apart from each other. The insulating layer is disposed on the first metal layer. The second metal layer is disposed on the insulating layer and includes multiple groups of second traces located in the fan-out region and spaced apart from each other. Each group of second traces corresponds to one first trace and includes multiple second traces spaced apart from each other. A first spacing exists between two adjacent groups of second traces, and a second spacing exists between two adjacent second traces in each group of second traces. The second spacing is not equal to the first spacing.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to an array substrate and a display device. Background Technology

[0002] Liquid crystal display devices include an array substrate and a color filter substrate. The array substrate typically has a display area and a fan-out area. The display area contains signal lines such as data lines and touch signal lines. These signal lines are connected to integrated circuits (ICs) through connection lines located in the fan-out area. The wiring in the fan-out area is relatively dense, and multiple metal layers are usually used for wiring.

[0003] The array substrate and the color filter substrate need to be bonded together using a frame. During the UV curing process, the frame located in the fan-out region is easily blocked by the metal traces in the metal layers, thus affecting the curing effect of the frame. Furthermore, it is difficult to maintain a consistent pitch of the metal traces in different metal layers, resulting in misalignment of the metal traces in different metal layers, which in turn leads to poor curing of the frame. Utility Model Content

[0004] This application provides an array substrate and a display device to at least alleviate the problem in related technologies where different pitches of metal traces in different metal layers lead to poor curing of the frame.

[0005] On one hand, embodiments of this application provide an array substrate having a fan-out region and including: Substrate; A first metal layer is disposed on the substrate and includes a plurality of first traces located in the fan-out region and spaced apart from each other; An insulating layer is disposed on the first metal layer; and A second metal layer is disposed on the insulating layer and includes a plurality of second trace groups located in the fan-out area and spaced apart from each other. Each second trace group corresponds to one first trace and includes a plurality of second traces spaced apart from each other. There is a first spacing between two adjacent second wiring groups, and a second spacing between two adjacent second wirings in each second wiring group. The second spacing is not equal to the first spacing.

[0006] In some embodiments, the orthographic projection of each of the first traces on the substrate overlaps the orthographic projection of the corresponding group of the second traces on the substrate.

[0007] In some embodiments, there is a third spacing between two adjacent first traces, the third spacing being equal to the first spacing.

[0008] In some embodiments, the second spacing is smaller than the first spacing.

[0009] In some embodiments, each second wiring group includes two second wirings.

[0010] In some embodiments, the array substrate further includes a dielectric layer and a third metal layer disposed sequentially on the side of the second metal layer away from the insulating layer, the third metal layer including a plurality of third trace groups spaced apart from each other, each third trace group including at least one third trace; the orthographic projection of each first trace on the substrate covers the orthographic projection of a corresponding third trace group on the substrate.

[0011] In some embodiments, each of the third trace groups includes one third trace, and the third trace and the first trace are connected to the same signal source.

[0012] In some embodiments, each third trace group includes multiple third traces, there is a fourth spacing between two adjacent third trace groups, and there is a fifth spacing between two adjacent third traces in each third trace group, the fifth spacing being unequal to the fourth spacing; the third traces and the first traces are respectively connected to different signal sources.

[0013] On the other hand, embodiments of this application also provide a display device, which includes an array substrate as described in any of the above embodiments and a color filter substrate disposed opposite to the array substrate.

[0014] In some embodiments, the display device further includes a frame located between the array substrate and the color filter substrate, the frame portion being disposed in the fan-out region.

[0015] In the array substrate provided in this application embodiment, since the first spacing between two adjacent second wiring groups is different from the second spacing between two adjacent second wirings in the same second wiring group, each second wiring group can be aligned with the corresponding first wiring, thereby effectively transmitting ultraviolet light by utilizing the gap between adjacent second wiring groups and the gap between adjacent first wirings, thereby improving the curing effect of the adhesive frame. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a cross-sectional view of an array substrate in related technologies; Figure 2 This is a schematic diagram of the structure of a display device provided in some embodiments of this application; Figure 3 yes Figure 2 Cross-sectional view of the structure along the A-A' direction; Figure 4 This is a cross-sectional view of an array substrate provided in some embodiments of this application; Figure 5 This is a cross-sectional view of an array substrate provided in some other embodiments of this application; Figure 6 This is a cross-sectional view of an array substrate provided in some embodiments of this application. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0019] In the description of this application, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words mean two or more, unless otherwise expressly defined.

[0020] In this application, the descriptions of the various embodiments each have their own emphasis. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. The embodiments, implementation methods, examples, and related technical features of this application can be combined and substituted for each other without conflict.

[0021] In related technologies, the array substrate includes multiple metal layers, and the metal traces in each metal layer are designed with equal pitch. Since the metal traces in different metal layers are used to transmit different signals, the metal traces in different metal layers typically use different pitches. For example... Figure 1 As shown, the pitch P1 of the first metal trace 11' in the first metal layer is different from the pitch P2 of the second metal trace 12' in the second metal layer. This can easily lead to misalignment between the first metal trace 11' and the second metal trace 12', resulting in random overlap.

[0022] During the UV curing process of the adhesive frame, because the first metal trace 11' and the second metal trace 12' do not form a good alignment relationship, most of the light that is vertically irradiated onto the array substrate is blocked by the first metal trace 11' and the second metal trace 12', resulting in poor curing effect of the adhesive frame, which in turn easily leads to problems such as liquid leakage and moisture intrusion.

[0023] To avoid severe misalignment between the first metal trace 11' and the second metal trace 12', related technologies typically add a mask process to reduce the linewidth of the metal traces, thereby ensuring good alignment and coverage between the first metal trace 11' and the second metal trace 12'. However, this increases the fabrication cost of the array substrate. Furthermore, because the first metal trace 11' and the second metal trace 12' randomly overlap, uneven etching and etching residue are also prone to occur.

[0024] Based on this, some embodiments of this application provide an array substrate and a display device including the array substrate, so as to at least alleviate the problem of poor curing effect of the frame caused by different pitches of metal traces in different metal layers.

[0025] like Figures 2 to 4 As shown, the array substrate 100 has a fan-out region FA. The array substrate 100 includes a substrate 11, a first metal layer 12, an insulating layer 13, and a second metal layer 14. The first metal layer 12 is disposed on the substrate 11 and includes a plurality of first traces 121 located in the fan-out region FA and spaced apart from each other. The insulating layer 13 is disposed on the first metal layer 12. The second metal layer 14 is disposed on the insulating layer 13 and includes a plurality of second trace groups 140 located in the fan-out region FA and spaced apart from each other. Each second trace group 140 corresponds to one first trace 121 and includes a plurality of second traces 141 spaced apart from each other.

[0026] There is a first spacing D1 between two adjacent second wiring groups 140, and a second spacing D2 between two adjacent second wirings 141 in each second wiring group 140. The second spacing D2 is not equal to the first spacing D1.

[0027] For the array substrate 100 provided in this application embodiment, since the first spacing D1 between two adjacent second wiring groups 140 is different from the second spacing D2 between two adjacent second wiring lines 141 in the same second wiring group 140, each second wiring group 140 can be aligned with the corresponding first wiring line 121, thereby utilizing the gap between adjacent second wiring groups 140 and the gap between adjacent first wiring lines 121 to effectively transmit ultraviolet light, thereby improving the curing effect of the adhesive frame.

[0028] The array substrate and display device provided in this application will be described below with reference to specific embodiments, which will be elaborated in detail below.

[0029] Some embodiments of this application provide a display device, such as... Figure 2 As shown, the display device 1000 has a display area AA and a fan-out area FA. The display area AA contains multiple sub-pixels and signal lines connected to the sub-pixels. The fan-out area FA is used to lead out the connection lines connected to the signal lines and connect them to the integrated circuit 400. The integrated circuit 400 can input corresponding signals to the sub-pixels through the signal lines to control the sub-pixels.

[0030] like Figure 3 As shown, the display device 1000 includes an array substrate 100 and a color filter substrate 200 disposed opposite to the array substrate 100.

[0031] The display device 1000 also includes a liquid crystal layer located between the array substrate 100 and the color filter substrate 200. By controlling the deflection of liquid crystal molecules in the liquid crystal layer, the activation of sub-pixels and the light emission brightness can be controlled.

[0032] In some embodiments, please refer to Figure 2 and Figure 3 The display device 1000 also includes a frame 300 located between the array substrate 100 and the color filter substrate 200, with a portion of the frame 300 disposed in the fan-out region FA. The frame 300 can bond the array substrate 100 and the color filter substrate 200 to ensure the stability of the display device 1000 in use.

[0033] For example, the frame 300 is located in the non-display area of ​​the display device 1000 and is set around the display area AA, and the fan-out area FA is located in the non-display area.

[0034] It is worth noting that, please continue reading... Figure 2 During the curing process of the frame 300, the display device 1000 needs to be inverted so that the array substrate 100 is above the color filter substrate 200. Then, ultraviolet light is used to irradiate the array substrate 100, allowing the ultraviolet light to reach the frame 300 and cure it. However, since the array substrate 100 has metal traces in the fan-out region FA, these metal traces block the ultraviolet light, thus affecting the curing effect of the ultraviolet light on the frame 300.

[0035] In the embodiments of this application, such as Figure 4As shown, the array substrate 100 has a fan-out region FA, which coincides with the fan-out region of the display device 1000. The array substrate 100 includes a substrate 11, and a first metal layer 12, an insulating layer 13, and a second metal layer 14 sequentially disposed on the substrate 11 in a direction away from the substrate 11. The first metal layer 12 includes a plurality of first traces 121 located in the fan-out region FA and spaced apart from each other. The insulating layer 13 covers the plurality of first traces 121, thereby achieving insulation and protection for the plurality of first traces 121. The second metal layer 14 includes a plurality of second trace groups 140 located in the fan-out region FA and spaced apart from each other. Each second trace group 140 corresponds to one first trace 121 and includes a plurality of second traces 141 spaced apart from each other. The linewidths of the second traces 141 in the second metal layer 14 are all equal.

[0036] The second wiring group 140 has a first spacing D1 between two adjacent second wiring groups 140, and each second wiring group 140 has a second spacing D2 between two adjacent second wirings 141. The second spacing D2 is not equal to the first spacing D1. This facilitates the alignment of each second wiring group 140 with the corresponding first wiring 121, thereby allowing ultraviolet light to pass through effectively using the gaps between adjacent second wiring groups 140 and adjacent first wirings 121, thus improving the curing effect of the adhesive frame 300.

[0037] In some examples, the first trace 121 can be used to transmit touch signals, and the second trace 141 can be used to transmit data signals. Of course, the above is only an illustrative example, and the signal lines connected to the first trace 121 and the second trace 141 can be adjusted as needed.

[0038] In some embodiments, please continue reading Figure 4 The orthographic projection of each first trace 121 on the substrate 11 covers the orthographic projection of the corresponding second trace group 140 on the substrate 11.

[0039] This configuration allows each first trace 121 to block the corresponding second trace group 140, so that most of the ultraviolet light passing through the gap between two adjacent second trace groups 140 can pass through the gap between adjacent first traces 121, thereby ensuring that the ultraviolet light has a large irradiation area on the frame 300, thus improving the curing effect of the frame 300.

[0040] In some examples, please refer to [link / reference]. Figure 4 There is a third spacing D3 between two adjacent first lines 121, and the third spacing D3 is equal to the first spacing D1.

[0041] This configuration ensures that the gap between two adjacent second wiring groups 140 is equal to the gap between two adjacent first wiring groups 121. Therefore, the ultraviolet light passing through the gap between two adjacent second wiring groups 140 can completely pass through the gap between adjacent first wiring groups 121, thus effectively increasing the irradiation area of ​​the frame 300 by ultraviolet light, thereby further improving the curing effect of the frame 300.

[0042] In some embodiments, please continue reading Figure 4 The second spacing D2 is smaller than the first spacing D1 between two adjacent second wiring groups 140.

[0043] This configuration allows the first spacing D1 to have a relatively large size, thereby increasing the amount of ultraviolet light transmitted through the gap between adjacent second wiring groups 140. This, in turn, helps to increase the area of ​​ultraviolet light irradiating the frame 300, thus improving the curing effect of the frame 300. Furthermore, the second spacing D2 between two adjacent second traces 141 in the same second wiring group 140 has a relatively small size. This increases the linewidth of the second trace 141, thereby reducing the impedance of the second trace 141 and facilitating signal transmission.

[0044] In some embodiments, please continue reading Figure 4 Each second wiring group 140 includes two second wirings 141.

[0045] This configuration avoids the problem of small trace widths for the second traces 141 due to an excessive number of second traces 141 in the second trace group 140 and the need to maintain a second spacing D2 between adjacent second traces 141. This ensures that each second trace 141 in the second trace group 140 has a relatively large trace width, effectively reducing the impedance of the second trace 141 and improving its signal transmission efficiency.

[0046] In some embodiments, such as Figure 5 and Figure 6 As shown, the array substrate 100 also includes a dielectric layer 15 and a third metal layer 16 disposed sequentially on the side of the second metal layer 14 away from the insulating layer 13. The third metal layer 16 includes a plurality of third wiring groups 160 spaced apart from each other, and each third wiring group 160 includes at least one third wiring 161. The orthographic projection of each first wiring 121 on the substrate 11 covers the orthographic projection of a corresponding third wiring group 160 on the substrate 11.

[0047] In this embodiment, by providing a third metal layer 16, more traces can be laid in the fan-out region FA, thereby improving the integration of the array substrate 100. Furthermore, since the orthographic projection of each first trace 121 on the substrate 11 covers the orthographic projection of a corresponding third trace group 160 on the substrate 11, most of the ultraviolet light passing through the gap between two adjacent third trace groups 160 can pass through the gap between adjacent first traces 121, thus ensuring that the ultraviolet light has a larger irradiation area on the frame 300, thereby improving the curing effect of the frame 300.

[0048] In some examples, please refer to Figure 5 Each third trace group 160 includes a third trace 161, and the third trace 161 and the first trace 121 are connected to the same signal source. That is, the third trace 161 and the first trace 121 are used to transmit the same signal. For example, both the third trace 161 and the first trace 121 are used to transmit touch signals.

[0049] As an example, the linewidths of the first trace 121 and the third trace 161 are the same. For instance, the orthographic projection of the first trace 121 on the substrate 11 coincides with the orthographic projection of the third trace 161 on the substrate 11. This ensures that the impedances of the first trace 121 and the third trace 161 are consistent, thereby improving signal transmission performance. Furthermore, it effectively ensures that the area of ​​the frame 300 irradiated by ultraviolet light is not reduced when the third metal layer 16 is added, thus ensuring the curing effect of the frame 300.

[0050] In some examples, please refer to Figure 6 Each third wiring group 160 includes multiple third wirings 161. There is a fourth spacing D4 between adjacent third wiring groups 160, and a fifth spacing D5 between adjacent third wirings 161 within each third wiring group 160. The fourth spacing D4 and the fifth spacing D5 are not equal. In this case, the third wirings 161 are configured using a non-equidistant pitch method consistent with the second wirings 141.

[0051] The third trace 161 and the first trace 121 are connected to different signal sources. That is, the third trace 161 and the first trace 121 are used to transmit different signals.

[0052] As an example, each third trace group 160 includes two third traces 161. The fourth spacing D4 between two adjacent third trace groups 160 is equal to the first spacing D1 between two adjacent second trace groups 140. The fifth spacing D5 between two adjacent third traces 161 in the same third trace group 160 is equal to the second spacing D2 between two adjacent second traces 141 in the same second trace group 140. For example, the orthographic projection of each third trace 161 on the substrate 11 coincides with the orthographic projection of a corresponding second trace 141 on the substrate 11.

[0053] This setup effectively ensures that the area of ​​the frame 300 exposed to ultraviolet light will not decrease when the third metal layer 16 is added, thus ensuring the curing effect of the frame 300.

[0054] As an example, the third trace 161 and the second trace 141 can be connected to the same signal source, in which case the third trace 161 and the second trace 141 are used to transmit the same signal.

[0055] It is worth noting that, for the display device 1000 provided in some embodiments of this application, since it includes an array substrate 100, the display device 1000 has the technical effects of the array substrate 100 described above, which will not be repeated here.

[0056] Furthermore, the display device 1000 provided in this application embodiment is not limited to conventional bezels or narrow bezels. By using the second trace 141 in the second metal layer 14 with non-equidistant pitch, a good curing effect on the frame 300 can be achieved without changing the bezel size, thereby effectively ensuring the structural stability of the display device 1000.

[0057] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An array substrate, characterized by, The array substrate has a fan-out region and includes: Substrate; A first metal layer is disposed on the substrate and includes a plurality of first traces located in the fan-out region and spaced apart from each other; An insulating layer is disposed on the first metal layer; and A second metal layer is disposed on the insulating layer and includes a plurality of second trace groups located in the fan-out area and spaced apart from each other. Each second trace group corresponds to one first trace and includes a plurality of second traces spaced apart from each other. There is a first spacing between two adjacent second wiring groups, and a second spacing between two adjacent second wirings in each second wiring group. The second spacing is not equal to the first spacing.

2. The array substrate of claim 1, wherein, The orthographic projection of each of the first traces on the substrate overlaps the orthographic projection of the corresponding group of the second traces on the substrate.

3. The array substrate of claim 2, wherein, There is a third spacing between two adjacent first traces, and the third spacing is equal to the first spacing.

4. The array substrate of claim 1, wherein, The second spacing is smaller than the first spacing.

5. The array substrate according to any one of claims 1-4, wherein, Each second routing group includes two second routing lines.

6. The array substrate according to any one of claims 1-4, characterized in that, The array substrate further includes a dielectric layer and a third metal layer disposed sequentially on the side of the second metal layer away from the insulating layer. The third metal layer includes a plurality of third trace groups spaced apart from each other, and each third trace group includes at least one third trace. The orthographic projection of each first trace on the substrate covers the orthographic projection of a corresponding third trace group on the substrate.

7. The array substrate of claim 6, wherein, Each of the third routing groups includes one third routing line, and the third routing line and the first routing line are connected to the same signal source.

8. The array substrate of claim 6, wherein, Each of the third routing groups includes multiple third routing lines, with a fourth spacing between two adjacent third routing groups, and a fifth spacing between two adjacent third routing lines in each third routing group, the fifth spacing being unequal to the fourth spacing; the third routing lines and the first routing lines are respectively connected to different signal sources.

9. A display device, characterized by comprising: include: The array substrate as described in any one of claims 1-8 and the color filter substrate disposed opposite to the array substrate.

10. The display device according to claim 9, wherein The display device further includes a frame located between the array substrate and the color filter substrate, the frame portion being disposed in the fan-out region.

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