Display substrate and display device

Abstract

A display substrate and a display device, the display substrate comprising: a substrate and a plurality of sub-pixels arranged on the substrate, the plurality of sub-pixels being arranged in an array, the plurality of sub-pixels being divided into a plurality of columns of sub-pixels; the display substrate further comprising: a plurality of data lines (10), each data line (10) being coupled to each sub-pixel in a corresponding column of sub-pixels; a plurality of touch electrodes and a plurality of touch signal lines (20), each touch signal line (20) being coupled to a corresponding touch electrode; a normal projection of the touch signal line (20) on the substrate is adjacent to a normal projection of the corresponding data line (10) on the substrate; the touch signal line (20) comprises a first touch portion (201) and a second touch portion (202) coupled to each other, the first touch portion (201) and the second touch portion (202) are arranged in different layers, and the second touch portion (202) is arranged in the same layer and made of the same material as the data line (10).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display substrate and a display device. BACKGROUND

[0002] With the continuous development of touch display technology, the application range of touch display devices is more and more extensive. The touch display device integrates touch function and display function, can display the corresponding picture according to the need, and can also identify the touch position of the user on the touch display device to realize the corresponding touch function.

[0003] In order to meet the needs of more application scenarios, the types of touch display devices are more and more, such as narrow frame touch display device, large size touch display device, small size touch display device, etc. SUMMARY

[0004] The purpose of the present disclosure is to provide a display substrate and a display device.

[0005] In order to achieve the above purpose, the present disclosure provides the following technical solutions:

[0006] The first aspect of the present disclosure provides a display substrate, comprising: a substrate and a plurality of sub-pixels arranged on the substrate, the plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels are divided into a plurality of sub-pixel columns; the display substrate further comprises:

[0007] A plurality of data lines, each data line is coupled with each sub-pixel in a corresponding sub-pixel column;

[0008] A plurality of touch electrodes and a plurality of touch signal lines, the touch signal line is coupled with a corresponding touch electrode; the orthogonal projection of the touch signal line on the substrate is adjacent to the orthogonal projection of the corresponding data line on the substrate; the touch signal line comprises a first touch part and a second touch part coupled with each other, the first touch part and the second touch part are arranged in different layers, and the second touch part is arranged in the same layer and the same material as the data line.

[0009] Optionally, a part of the first touch part is located between the second touch part and the substrate.

[0010] Optionally, the display substrate further comprises a light shielding layer, and the first touch part is arranged in the same layer and the same material as the light shielding layer.

[0011] Optionally, the plurality of sub-pixels are divided into a plurality of sub-pixel rows; the display substrate further comprises a plurality of gate lines, each gate line is coupled with each sub-pixel in a corresponding sub-pixel row;

[0012] The first touch part and the gate line are arranged in the same layer and the same material.

[0013] Optionally, the first touch control part comprises, in sequence from the direction away from the substrate, a molybdenum metal layer, an aluminum metal layer and a molybdenum metal layer.

[0014] Optionally, in the same touch control signal line, the ratio of the length of the first touch control part to the total length of the orthographic projection of the first touch control part on the substrate is greater than 50%.

[0015] Optionally, in the same touch control signal line, the first touch control part and the adjacent second touch control part are coupled by a via.

[0016] Optionally, the plurality of sub-pixels are divided into a plurality of rows of sub-pixel rows; the display substrate further comprises a plurality of gate lines, each gate line being coupled to each sub-pixel in a corresponding row of sub-pixel rows.

[0017] In the extension direction of the data line, the orthographic projection of the gate line on the substrate and the orthographic projection of the first touch control part on the substrate are arranged alternately.

[0018] Optionally, the sub-pixel further comprises a pixel electrode, and the orthographic projection of the first touch control part on the substrate and the orthographic projection of the pixel electrode on the substrate do not overlap.

[0019] Optionally, the sub-pixel further comprises a common electrode, and the orthographic projection of the first touch control part on the substrate and the orthographic projection of the common electrode on the substrate at least partially overlap.

[0020] Optionally, at least part of the orthographic projection of the second touch control part on the substrate and the orthographic projection of the gate line on the substrate partially overlap.

[0021] Optionally, the data line and the sub-pixel column are arranged alternately; the plurality of data lines comprise a plurality of first data lines and a plurality of second data lines, the plurality of touch control signal lines correspond to the plurality of first data lines one by one, the touch control signal line is adjacent to the corresponding first data line; at least part of the adjacent touch control signal line and the first data line are located between the adjacent two columns of sub-pixel columns.

[0022] The first data line comprises a first data part and a second data part, and in the extension direction of the first data line, the first data part and the second data part are arranged alternately, and the second data part is coupled to the control transistor in the corresponding sub-pixel.

[0023] The second data line comprises a third data part, a fourth data part and a fifth data part arranged in sequence in a cycle, the fourth data part is coupled to the control transistor in the corresponding sub-pixel, and the orthographic projection of the fifth data part on the substrate and the orthographic projection of the gate line on the substrate at least partially overlap.

[0024] The third data portion has a width in a direction perpendicular to its own extension direction that is greater than a width of the first data portion in a direction perpendicular to its own extension direction and greater than a width of the first touch portion in a direction perpendicular to its own extension direction.

[0025] Optionally, the plurality of sub-pixel columns are divided into a plurality of pixel unit columns, each pixel unit column including at least two adjacent sub-pixel columns; and the touch signal lines are arranged alternately with the pixel unit columns.

[0026] Optionally, the sub-pixel includes a control transistor and a pixel electrode, a gate of the control transistor is coupled with a corresponding gate line, a first pole of the control transistor is coupled with a corresponding data line, and a second pole of the control transistor is coupled with the pixel electrode.

[0027] The display substrate further includes a light shielding layer including a plurality of light shielding patterns, a projection of the light shielding pattern on the base at least partially overlaps with a projection of a channel portion of the corresponding control transistor on the base.

[0028] Based on the technical solutions of the display substrate described above, a second aspect of the present disclosure provides a display device including the display substrate. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of the present disclosure, illustrate the illustrative embodiments of the present disclosure and serve to explain the present disclosure, and do not limit the present disclosure in any way. In the drawings:

[0030] Figure 1 A first layout schematic diagram of the display substrate provided by the embodiments of the present disclosure;

[0031] Figure 2 A layout schematic diagram of the light shielding layer and the active layer and the gate metal layer in the display substrate provided by the embodiments of the present disclosure; Figure 1

[0032] A layout schematic diagram of the gate line and the data line and the touch signal line in the display substrate provided by the embodiments of the present disclosure; Figure 3 Figure 3 A second layout schematic diagram of the display substrate provided by the embodiments of the present disclosure;

[0033] Figure 4 A layout schematic diagram of the light shielding layer and the active layer and the gate metal layer in the display substrate provided by the embodiments of the present disclosure;

[0034] Figure 5 Figure 4 A layout schematic diagram of the gate line and the data line and the touch signal line in the display substrate provided by the embodiments of the present disclosure;

[0035] Figure 6 ​​A schematic diagram of the mean value and resistance uniformity of the line resistance of a plurality of display substrates is provided for the embodiments of the present disclosure;

[0036] Figure 7 A schematic diagram of the line resistance values of 24 points of two display substrates is provided for the embodiments of the present disclosure;

[0037] Figure 8 For Figure 1 A cross-sectional electron microscope image of a via connecting the first touch control part and the second touch control part;

[0038] Figure 9 For Figure 3 A cross-sectional electron microscope image of a via connecting the first touch control part and the second touch control part. DETAILED DESCRIPTION

[0039] In order to further illustrate the display substrate and display device provided by the embodiments of the present disclosure, the following will be described in detail in conjunction with the accompanying drawings of the specification.

[0040] The present disclosure provides a touch display device, which comprises gate lines and a plurality of data lines, the gate lines and the data lines are arranged in a cross manner to define a plurality of sub-pixels. The touch display device further comprises a plurality of touch electrodes and a plurality of touch signal lines, the touch signal lines are coupled with the corresponding touch electrodes. The touch signal lines and the data lines are arranged in the same layer and with the same material, and the touch signal lines are adjacent to part of the data lines.

[0041] In the above touch display device, the touch signal lines and the data lines are arranged in the same layer and with the same material, and the touch signal lines and the data lines are formed in the same patterning process.

[0042] The patterning process mainly includes the following procedures: forming a conductive material layer. Then continue to form photoresist on the conductive material layer, use a mask to expose the photoresist, form a photoresist reserved area and a photoresist removed area, the photoresist reserved area corresponds to the area where the touch signal lines and the data lines are located, and the photoresist removed area corresponds to other areas except the area where the touch signal lines and the data lines are located. Use a developing solution to remove the photoresist in the photoresist removed area. Use the remaining photoresist in the photoresist reserved area as a mask to etch and remove the conductive material layer exposed by the photoresist removed area. Finally, remove the remaining photoresist to form the touch signal lines and the data lines.

[0043] Since in part of the area of the touch display device, the touch signal lines are adjacent to the data lines, the spacing between the touch signal lines and the adjacent data lines is very small, and during the above etching process, conductive material is easily left between the touch signal lines and the adjacent data lines, resulting in short circuit failure between the touch signal lines and the adjacent data lines.

[0044] However, due to the limited detection capability of the automatic optical inspection (AOI) equipment, some defects are missed, and thus the subsequently formed touch display device has a square grid line defect when displaying. The occurrence rate of such defects can reach 1.5%, and for large-size touch display products, such defects are more prominent, and the occurrence rate can reach about 4%.

[0045] Please refer to Figures 1 to 5 The display substrate provided by the embodiments of the present disclosure includes a substrate and a plurality of sub-pixels arranged on the substrate, the plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels are divided into a plurality of sub-pixel columns; the display substrate further includes:

[0046] a plurality of data lines 10 (including a first data line 101 and a second data line 102), each data line 10 is coupled to each sub-pixel in a corresponding sub-pixel column;

[0047] a plurality of touch electrodes and a plurality of touch signal lines 20, each touch signal line 20 is coupled to a corresponding touch electrode; the orthogonal projection of the touch signal line 20 on the substrate is adjacent to the orthogonal projection of the corresponding data line 10 on the substrate; the touch signal line 20 includes a first touch portion 201 and a second touch portion 202 coupled to each other, the first touch portion 201 and the second touch portion 202 are arranged in different layers, and the second touch portion 202 is arranged in the same layer and the same material as the data line 10.

[0048] For example, the plurality of sub-pixels are divided into a plurality of sub-pixel rows and a plurality of sub-pixel columns. The plurality of sub-pixel rows are arranged along a first direction, and each sub-pixel row includes a plurality of sub-pixels arranged along a second direction. The plurality of sub-pixel columns are arranged along the second direction, and each sub-pixel column includes a plurality of sub-pixels arranged along the first direction. For example, the first direction intersects the second direction. The first direction includes a longitudinal direction, and the second direction includes a transverse direction.

[0049] For example, the display substrate further includes a plurality of gate lines 40 and a plurality of data lines 10, the gate lines 40 include at least a portion extending along the second direction, and the data lines 10 include at least a portion extending along the first direction. The plurality of gate lines 40 correspond one-to-one to the plurality of sub-pixel rows. The plurality of data lines 10 correspond one-to-one to the plurality of sub-pixel columns.

[0050] For example, each sub-pixel includes a pixel opening region, and the pixel opening region is an effective light-emitting region of the sub-pixel.

[0051] Exemplarily, the touch electrodes are arranged in an array, and a projection of each touch electrode on the substrate at least partially overlaps with a projection of at least two pixel openings on the substrate.

[0052] Exemplarily, the touch signal line 20 comprises at least a portion extending along the first direction. The touch signal line 20 is coupled with a corresponding touch electrode, and the touch signal line 20 is capable of transmitting a touch signal on the touch electrode coupled therewith.

[0053] Exemplarily, the plurality of touch signal lines 20 correspond to the plurality of data lines 10 one by one, and a projection of the touch signal line 20 on the substrate is adjacent to a projection of the corresponding data line 10 on the substrate. The touch signal line 20 and the corresponding data line 10 are located between two adjacent pixel opening regions.

[0054] Exemplarily, the first touch portion 201 and the second touch portion 202 have an insulating layer therebetween, and the first touch portion 201 and the second touch portion 202 are formed in different patterning processes respectively. The second touch portion 202 is arranged in the same layer and of the same material as the data line 10, and the second touch portion 202 and the data line 10 can be formed simultaneously in the same patterning process.

[0055] According to the specific structure of the display substrate, in the display substrate provided by the embodiments of the present disclosure, the touch signal line 20 comprises the first touch portion 201 and the second touch portion 202 coupled with each other, the first touch portion 201 and the second touch portion 202 are arranged in different layers, and the second touch portion 202 is arranged in the same layer and of the same material as the data line 10. Thus, the first touch portion 201 in each touch signal line 20 can be arranged in a different layer from the data line 10, so that the first touch portion 201 and the data line 10 can be formed in different patterning processes. The proportion of the wiring between the touch signal line 20 and the corresponding data line 10 arranged in the same film layer is reduced, the risk of residual conductive material between the touch signal line 20 and the adjacent data line 10 in the etching process is reduced, the manufacturing yield of the touch signal line 20 and the adjacent data line 10 is improved, and the probability of the display substrate having a square grid line defect when displaying is effectively reduced.

[0056] As shown in FIGS. Figure 1 , Figure 3 and Figure 4 Exemplarily, a portion of the first touch portion 201 is located between the second touch portion 202 and the substrate.

[0057] Exemplarily, the first touch portion 201 is closer to the substrate of the display substrate than the second touch portion 202.

[0058] For example, in the same touch signal line 20, the orthographic projection of the first touch portion 201 on the substrate and the orthographic projection of the adjacent second touch portion 202 on the substrate have an overlapping area, in which the first touch portion 201 is located between the second touch portion 202 and the substrate.

[0059] For example, the first touch portion 201 can be disposed in the same layer and with the same material as the conductive structure located between the second touch portion 202 and the substrate. This allows the first touch portion 201 and the conductive structure to be formed simultaneously in the same patterning process, avoiding the need for additional patterning processes to manufacture the first touch portion 201. This effectively simplifies the manufacturing process of the display substrate and reduces the manufacturing cost of the display substrate.

[0060] In some embodiments, a portion of the second touch portion 202 is located between the first touch portion 201 and the substrate.

[0061] For example, the second touch portion 202 is closer to the substrate of the display substrate than the first touch portion 201.

[0062] For example, in the same touch signal line 20, the orthographic projection of the first touch portion 201 on the substrate and the orthographic projection of the adjacent second touch portion 202 on the substrate have an overlapping area, in which the second touch portion 202 is located between the first touch portion 201 and the substrate.

[0063] For example, the first touch portion 201 can be disposed in the same layer and with the same material as the conductive structure located on the side of the second touch portion 202 facing away from the substrate. This allows the first touch portion 201 and the conductive structure to be formed simultaneously in the same patterning process, avoiding the need for additional patterning processes to manufacture the first touch portion 201. This effectively simplifies the manufacturing process of the display substrate and reduces the manufacturing cost of the display substrate.

[0064] like Figures 1 to 3 As shown, in some embodiments, the display substrate further includes a light-shielding layer, and the first touch portion 201 is disposed in the same layer and with the same material as the light-shielding layer (including the light-shielding pattern LS).

[0065] For example, for a narrow bezel display substrate, the fanout lines in the display substrate can be made using the light-shielding layer.

[0066] Exemplarily, the light-shielding layer comprises a first molybdenum metal layer, an aluminum metal layer and a second molybdenum metal layer which are sequentially and layerwisely arranged in a direction away from the substrate. The aluminum metal layer has a thickness in a direction perpendicular to the substrate. The second molybdenum metal layer has a thickness in a direction perpendicular to the substrate.

[0067] In the display substrate provided by the above embodiment, the first touch control part 201 and the light-shielding layer are arranged in the same layer and made of the same material, so that the first touch control part 201 can be formed at the same time as the light-shielding layer in the same patterning process, thereby avoiding an additional patterning process for manufacturing the first touch control part 201, effectively simplifying the manufacturing process flow of the display substrate and reducing the manufacturing cost of the display substrate.

[0068] As shown in FIGS. 1, 2 and 3, in some embodiments, the plurality of sub-pixels are divided into a plurality of rows of sub-pixels; the display substrate further comprises a plurality of gate lines 40, each of which is coupled to each sub-pixel in a corresponding row of sub-pixels; and the first touch control part 201 is arranged in the same layer and made of the same material as the gate lines 40. Figure 4 Figure 5 As shown in FIGS. 1, 2 and 3, in some embodiments, the plurality of sub-pixels are divided into a plurality of rows of sub-pixels; the display substrate further comprises a plurality of gate lines 40, each of which is coupled to each sub-pixel in a corresponding row of sub-pixels; and the first touch control part 201 is arranged in the same layer and made of the same material as the gate lines 40.

[0069] Exemplarily, the gate lines 40 comprise a first molybdenum metal layer, an aluminum metal layer and a second molybdenum metal layer which are sequentially and layerwisely arranged in a direction away from the substrate. The gate lines 40 with the above structure can meet the gate line loading requirement of a large-size display substrate, and can also meet the line resistance requirement of the touch signal lines 20 in the large-size display substrate, i.e., less than 0.1 Ω / sq.

[0070] In the display substrate provided by the above embodiment, the first touch control part 201 and the gate lines 40 are arranged in the same layer and made of the same material, so that the first touch control part 201 can be formed at the same time as the gate lines 40 in the same patterning process, thereby avoiding an additional patterning process for manufacturing the first touch control part 201, effectively simplifying the manufacturing process flow of the display substrate and reducing the manufacturing cost of the display substrate.

[0071] In some embodiments, the first touch control part 201 comprises a molybdenum metal layer, an aluminum metal layer and a molybdenum metal layer which are sequentially and layerwisely arranged in a direction away from the substrate.

[0072]

[0073] Table 1

[0074] ​It should be noted that in Table 1, 3K, 2K, 8K represent display substrate resolution. The frequency in the design requirement refers to the refresh frequency of the display substrate. The arrow in the table represents the same as the adjacent row on the left. WQ represents a high-definition screen with a resolution of 2560x1440 pixels, also known as a 2K display screen. FLK represents the flicker condition.

[0075]

[0076] Table 2

[0077] It should be noted that in Table 2, CD represents the critical dimension. R / C represents the charge rate level.

[0078] As shown in Figure 6 , the abscissa represents the display substrate being tested. The left ordinate represents the average resistance of the line resistance corresponding to the 24 test points selected on the display substrate. The right ordinate represents the uniformity of the line resistance of the display substrate. Figure 6 The middle bar chart shows the average resistance of the line resistance corresponding to the 24 test points in the display substrate. The curve shows the uniformity of the line resistance of the display substrate.

[0079] Figure 6 In the display substrates of A1-A6, the thickness corresponding to Mo / Al / Mo is 250 / 3000 / 800. In the display substrates of A7-B4, the thickness corresponding to Mo / Al / Mo is 500 / 3000 / 300. In the display substrates of B5-C2, the thickness corresponding to Mo / Al / Mo is 800 / 3000 / 300. In the display substrates of C3-C8, the thickness corresponding to Mo / Al / Mo is 800 / 3000 / 500. The unit of the above thickness is It should be noted that Mo / Al / Mo refers to: Mo metal layer close to the substrate / Al metal layer / Mo metal layer away from the substrate.

[0080] As shown in Figure 7 , the line resistance values corresponding to the 24 test points in two narrow-frame display substrates (the first touch control part is made of the same material as the light-shielding layer) are shown. Figure 7 In the above, the abscissa represents the 24 test points, and the ordinate represents the line resistance value.

[0081] Referring to the above Table 1 and Table 2, Figure 6 and Figure 7, it is found that mainstream Mobile (mobile phone), TPC (tablet), NB (tablet computer) and other display products gradually have high frequency demand, and the grid line 40 in the display product is made of a single layer of molybdenum metal and cannot meet the extremely high frequency charging specification. The MNT (display) large size high resolution display product cannot normally display due to excessive loading and serious mischarging. The vehicle-mounted and NB display products in the medium size TDDI product cause differences in the coupling between the grid line 40 and the common electrode 60 due to the increase of the grid line loading, thereby causing in-plane flicker and poor display uniformity, which cannot meet the product requirements.

[0082] The conductivity of the metal Al is more suitable for medium and large size products, but Al is easy to oxidize and needs to be protected by Mo metal. Based on the above, it is finally determined that the grid line 40 is made of a molybdenum metal layer, an aluminum metal layer and a molybdenum metal layer stacked in the direction away from the substrate. The thickness of the molybdenum metal layer close to the substrate in the direction perpendicular to the substrate is The thickness of the aluminum metal layer in the direction perpendicular to the substrate is The thickness of the molybdenum metal layer away from the substrate in the direction perpendicular to the substrate is The touch signal line 20 uses the same film layer structure as the grid line 40 for jumper connection, which can meet the line resistance requirement of the touch signal line 20 in the large size display substrate, i.e. less than 0.1Ω / sq.

[0083] For a narrow frame display substrate, the fan-out line in the display substrate is made of the light shielding layer. The light shielding layer includes a molybdenum metal layer, an aluminum metal layer and a molybdenum metal layer stacked in the direction away from the substrate. For example, the thickness of the molybdenum metal layer close to the substrate in the direction perpendicular to the substrate is The thickness of the aluminum metal layer in the direction perpendicular to the substrate is The thickness of the molybdenum metal layer away from the substrate in the direction perpendicular to the substrate is The touch signal line 20 using the light shielding layer for jumper connection can meet the line resistance requirement of the touch signal line 20 in the small size and narrow frame display substrate, i.e. less than 0.3Ω / sq.

[0084] In the display substrate provided by the above embodiment, the first touch part 201 includes a molybdenum metal layer, an aluminum metal layer and a molybdenum metal layer stacked in the direction away from the substrate, which can meet the line resistance requirement of the touch signal line 20 and has high process feasibility.

[0085] In some embodiments, in the same touch signal line 20, the ratio of the length of the first touch part 201 to the total length of the orthographic projection of the touch signal line 20 on the substrate is greater than 50%.

[0086] For example, the length of the first touch portion 201 is the length of the first touch portion 201 along its own extending direction.

[0087] For example, the total length of the orthographic projection of the touch signal line 20 onto the substrate is the total length of the orthographic projection of the touch signal line 20 onto the substrate along its own extension direction.

[0088] For example, in the same touch signal line 20, the ratio of the length of the first touch portion 201 to the total length of the orthographic projection of the touch signal line 20 onto the substrate is greater than 60%.

[0089] For example, in the same touch signal line 20, the ratio of the length of the first touch portion 201 to the total length of the orthographic projection of the touch signal line 20 onto the substrate is 63%.

[0090] In the above configuration within the same touch signal line 20, the ratio of the length of the first touch portion 201 to the total length of the orthographic projection of the touch signal line 20 onto the substrate is greater than 50%.

[0091] This effectively reduces the proportion of adjacent wiring between the touch signal line 20 and the corresponding data line 10 in the same film layer, reduces the risk of residual conductive material between the touch signal line 20 and the adjacent data line 10 during the etching process, improves the manufacturing yield of the touch signal line 20 and the adjacent data line 10, reduces the probability of grid line defects in the display substrate from 4% to 1.48%, and increases the yield of the display substrate by 2.52%.

[0092] like Figure 1 , Figure 4 , Figure 8 and Figure 9 As shown, in some embodiments, the first touch portion 201 and the adjacent second touch portion 202 are coupled through vias on the same touch signal line 20.

[0093] like Figure 1 , Figure 4 , Figure 8 and Figure 9 As shown, in some embodiments, in the same touch signal line 20, the orthographic projection of the first touch portion 201 on the substrate and the orthographic projection of the second touch portion 202 on the substrate are alternately arranged. The orthographic projection of the first touch portion 201 on the substrate and the orthographic projection of the adjacent second touch portion 202 on the substrate have an overlapping area. The first touch portion 201 and the adjacent second touch portion 202 are coupled through vias in the overlapping area.

[0094] Exemplarily, the touch signal line 20 includes a plurality of first touch portions 201 and a plurality of second touch portions 202, the orthographic projection of the first touch portion 201 on the substrate is arranged alternately with the orthographic projection of the second touch portion 202 on the substrate.

[0095] Exemplarily, the second touch portion 202 and the data line 10 each include a titanium metal layer, an aluminum metal layer and a titanium metal layer which are sequentially stacked in a direction away from the substrate.

[0096] Exemplarily, the first touch portion 201 and the second touch portion 202 have at least one insulating layer therebetween, and a via connecting the first touch portion 201 and the second touch portion 202 penetrates the at least one insulating layer.

[0097] As shown in FIG. 1, Figure 8 As shown in FIG. 2, Figure 8 the first touch portion 201 (arranged in the same layer and material as the light shielding layer) and the second touch portion 202, and a via Via1 penetrating the insulating layer (including the buffer layer BUF and the interlayer insulating layer ILD) between the first touch portion 201 and the second touch portion 202 are shown.

[0098] As shown in FIG. 3, Figure 9 As shown in FIG. 4, Figure 9 the first touch portion 201 (arranged in the same layer and material as the gate line, with a thickness of 413 nm) and a via Via2 penetrating the interlayer insulating layer ILD above the first touch portion 201 are shown. Figure 9 It is also shown in FIG. 4 that the thickness of the Mo metal layer in the first touch portion 201 away from the substrate is 47.4 nm.

[0099] The first touch portion 201 is arranged to include a first molybdenum metal layer, an aluminum metal layer and a second molybdenum metal layer which are sequentially stacked in a direction away from the substrate. The second touch portion 202 includes a titanium metal layer, an aluminum metal layer and a titanium metal layer which are sequentially stacked in a direction away from the substrate. The touch signal line 20 adopts the first touch portion 201 and the second touch portion 202 with the above structure, which well meets the jumper line resistance requirement and has high process feasibility, and has a significant effect on improving the yield of the display substrate.

[0100] As shown in FIG. 5, Figure 2 and Figure 5 In some embodiments, the plurality of subpixels are divided into a plurality of subpixel rows; the display substrate further includes a plurality of gate lines 40, each of the gate lines 40 is coupled with each subpixel in a corresponding subpixel row.

[0101] The orthogonal projection of the gate line 40 on the substrate along the extension direction of the data line 10 is arranged alternately with the orthogonal projection of the first touch control part 201 on the substrate.

[0102] In some embodiments, the orthogonal projection of the first touch control part 201 on the substrate does not overlap with the orthogonal projection of the gate line 40 on the substrate.

[0103] In some embodiments, at least part of the orthogonal projection of the first touch control part 201 on the substrate is located between the orthogonal projections of the adjacent gate lines 40 on the substrate.

[0104] In the display substrate provided by the above embodiments, the orthogonal projection of the gate line 40 on the substrate along the extension direction of the data line 10 is arranged alternately with the orthogonal projection of the first touch control part 201 on the substrate, thereby reducing the risk of short circuit between the first touch control part 201 and the gate line 40.

[0105] In addition, the above arrangement can realize the same-layer and same-material arrangement of the first touch control part 201 and the gate line 40.

[0106] As shown in FIGS. 1 and 2, Figure 1 and Figure 4 In some embodiments, the sub-pixel further includes a pixel electrode 50, and the orthogonal projection of the first touch control part 201 on the substrate does not overlap with the orthogonal projection of the pixel electrode 50 on the substrate.

[0107] In some embodiments, the pixel electrode 50 is provided with a plurality of slits.

[0108] In some embodiments, the pixel electrode 50 includes a portion located in a pixel opening region.

[0109] In the display substrate provided by the above embodiments, the orthogonal projection of the first touch control part 201 on the substrate does not overlap with the orthogonal projection of the pixel electrode 50 on the substrate, thereby reducing the risk of short circuit between the first touch control part 201 and the pixel electrode 50, avoiding the formation of parasitic capacitance between the first touch control part 201 and the pixel electrode 50, and effectively improving the stability of the display substrate.

[0110] As shown in FIGS. 1 and 2, Figure 1 and Figure 4 In some embodiments, the sub-pixel further includes a common electrode 60, and the orthogonal projection of the first touch control part 201 on the substrate at least partially overlaps with the orthogonal projection of the common electrode 60 on the substrate.

[0111] Exemplarily, a projection of the first touch portion 201 on the substrate is covered by a projection of the common electrode 60 on the substrate.

[0112] Exemplarily, a plurality of sub-pixels in the display substrate are divided into a plurality of pixel units, and each pixel unit includes at least two sub-pixels arranged in the second direction in sequence. Exemplarily, each pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel arranged in the second direction in sequence. The display substrate includes a plurality of common electrodes 60 arranged in an array, and each common electrode 60 corresponds to one pixel unit.

[0113] Exemplarily, a projection of the common electrode 60 on the substrate at least partially overlaps a projection of a pixel opening region included in a corresponding pixel unit on the substrate.

[0114] Exemplarily, a projection of the common electrode 60 on the substrate covers a projection of each pixel opening region included in a corresponding pixel unit on the substrate.

[0115] As shown in Figure 1 and Figure 4 In some embodiments, at least part of a projection of the second touch portion 202 on the substrate partially overlaps a projection of the gate line 40 on the substrate.

[0116] Exemplarily, the second touch portion 202 and the data line 10 are made of a source-drain metal layer in the display substrate, and the second touch portion 202 and the gate line 40 have an insulating layer therebetween.

[0117] The above arrangement enables the touch signal line 20 to cross the gate line 40 through the second touch portion 202 without short-circuiting with the gate line 40, thereby ensuring the yield of the display substrate.

[0118] As shown in Figure 1 and Figure 3 In some embodiments, the data line 10 and the sub-pixel column are arranged alternately; the plurality of data lines 10 include a plurality of first data lines 101 and a plurality of second data lines 102, the plurality of touch signal lines 20 correspond to the plurality of first data lines 101 in one-to-one correspondence, and the touch signal line 20 is adjacent to the corresponding first data line 101; at least part of the adjacent touch signal line 20 and the first data line 101 are located between two adjacent sub-pixel columns.

[0119] The first data line 101 comprises a first data portion 1011 and a second data portion 1012, the first data portion 1011 and the second data portion 1012 are arranged alternately along the extending direction of the first data line 101, the second data portion 1012 is coupled with the control transistor TFT in the corresponding sub-pixel;

[0120] The second data line 102 comprises a third data portion 1021, a fourth data portion 1022 and a fifth data portion 1023 arranged in sequence, the fourth data portion 1022 is coupled with the control transistor TFT in the corresponding sub-pixel, the fifth data portion 1023 is at least partially overlapped with the orthographic projection of the gate line 40 on the substrate.

[0121] The width d1 of the third data portion 1021 in the direction perpendicular to the extending direction of the third data portion 1021 is greater than the width d2 of the first data portion 1011 in the direction perpendicular to the extending direction of the first data portion 1011, and greater than the width of the first touch portion 201 in the direction perpendicular to the extending direction of the first touch portion 201.

[0122] Illustratively, the data line and the sub-pixel column are arranged alternately along the second direction.

[0123] Illustratively, the first data line 101 is coupled with each sub-pixel in the corresponding sub-pixel column respectively. The second data line 102 is coupled with each sub-pixel in the corresponding sub-pixel column respectively.

[0124] Illustratively, the first data portion 1011 and the second data portion 1012 are formed as an integral structure. The third data portion 1021, the fourth data portion 1022 and the fifth data portion 1023 are formed as an integral structure. The first data line 101 and the second data line 102 are both made of a source-drain metal layer.

[0125] Illustratively, the orthographic projection of the first data portion 1011 on the substrate is at least partially overlapped with the orthographic projection of the gate line 40 on the substrate.

[0126] Illustratively, the width of the first data portion 1011 in the direction perpendicular to the extending direction of the first data portion 1011 is equal to the width of the first touch portion 201 in the direction perpendicular to the extending direction of the first touch portion 201.

[0127] Illustratively, the width of the first data portion 1011 in the direction perpendicular to the extending direction of the first data portion 1011 is 2.4 microns. The width of the first touch portion 201 in the direction perpendicular to the extending direction of the first touch portion 201 is 2.4 microns. The distance between the orthographic projection of the first data portion 1011 on the substrate and the orthographic projection of the adjacent first touch portion 201 on the substrate is 2.6 microns.

[0128] In the display substrate provided in the above embodiments, by setting the width of the third data portion 1021 in the direction perpendicular to its own extension to be greater than the width of the first data portion 1011 in the direction perpendicular to its own extension, and greater than the width of the first touch portion 201 in the direction perpendicular to its own extension, the load on the second data line 102 is effectively reduced while ensuring the uniformity of the distance between adjacent sub-pixel columns, thus ensuring the transmission performance of the touch signal line 20 and the first data line 101.

[0129] like Figure 1 and Figure 4 As shown, in some embodiments, the multi-column sub-pixel columns are divided into multi-column pixel unit columns, each column of pixel unit columns including at least two adjacent sub-pixel columns; the touch signal line 20 is alternately arranged with the pixel unit columns.

[0130] For example, each column of pixel units includes a red sub-pixel column, a green sub-pixel column, and a blue sub-pixel column. The red sub-pixel column includes multiple red sub-pixels, the green sub-pixel column includes multiple green sub-pixels, and the blue sub-pixel column includes multiple blue sub-pixels.

[0131] For example, the touch signal line 20 is alternately arranged with the pixel unit column, and the first data line 101 is alternately arranged with the pixel unit column.

[0132] like Figures 1 to 5 As shown, in some embodiments, the sub-pixel includes a control transistor TFT and a pixel electrode 50, the gate of the control transistor TFT is coupled to a corresponding gate line 40, the first electrode of the control transistor TFT is coupled to a corresponding data line, and the second electrode of the control transistor TFT is coupled to the pixel electrode 50.

[0133] The display substrate further includes a light-shielding layer comprising a plurality of light-shielding patterns LS, wherein the orthographic projection of the light-shielding pattern LS on the substrate at least partially overlaps with the orthographic projection of the channel portion of the corresponding control transistor TFT on the substrate.

[0134] For example, the pixel electrode is provided with a slit.

[0135] For example, the second electrode of the control transistor TFT is coupled to the pixel electrode 50 via a conductive connection portion 70.

[0136] For example, the gate line 40 is coupled to the gate of each control transistor TFT in the corresponding row of sub-pixels, and the data line is coupled to the first electrode of each control transistor TFT in the corresponding column of sub-pixels.

[0137] Exemplarily, the control transistor TFT includes a switch transistor, and the control transistor TFT is capable of being turned on or turned off under the control of the gate line 40 to which the control transistor TFT is coupled. The control transistor TFT is capable of transmitting a data voltage transmitted on the data line to which the control transistor TFT is coupled to the pixel electrode 50 in the sub-pixel to which the control transistor TFT belongs.

[0138] Exemplarily, the plurality of light shielding patterns LS are independent of each other, and the plurality of light shielding patterns LS correspond to the plurality of sub-pixels one by one. A projection of the light shielding pattern LS on the substrate at least partially overlaps a projection of a channel portion of the control transistor TFT in the sub-pixel corresponding to the light shielding pattern LS on the substrate. Exemplarily, the projection of the light shielding pattern LS on the substrate covers the projection of the channel portion of the control transistor TFT in the sub-pixel corresponding to the light shielding pattern LS on the substrate.

[0139] The display device provided by the embodiments of the present disclosure can be a television, a display, a digital photo frame, a mobile phone, a tablet computer, or any product or component having a display function. The display device further includes a flexible circuit board, a printed circuit board, a back plate, and the like.

[0140] It should be noted that the display device can be any product or component having a display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet computer, and the like. The display device further includes a flexible circuit board, a printed circuit board, a back plate, and the like.

[0141] Exemplarily, the display device includes a display device integrated with a touch and display driver (English: Touch and Display Driver Integration, TDDI for short). The display device includes a large-size TDDI display device, a small-size TDDI display device, and a narrow-frame TDDI display device.

[0142] Exemplarily, the display device includes a liquid crystal touch display device.

[0143] In the display substrate provided by the above embodiments, the touch signal line includes a first touch portion and a second touch portion coupled to each other. The first touch portion is disposed in a different layer from the second touch portion, and the second touch portion is disposed in the same layer and made of the same material as the data line. Thus, the first touch portion in each touch signal line can be disposed in a different layer from the data line, so that the first touch portion and the data line can be formed in different patterning processes. The proportion of the wiring between the touch signal line and the corresponding data line disposed adjacent to each other in the same film layer is reduced, so that the risk of residual conductive material between the touch signal line and the adjacent data line in the etching process is reduced, the manufacturing yield of the touch signal line and the adjacent data line is improved, and the probability of the display substrate having a square grid line defect during display is effectively reduced.

[0144] The display device provided by the embodiments of the present disclosure has the beneficial effects described above when including the display substrate, and details are not repeated here.

[0145] It should be noted that, in the embodiments of the present disclosure, the signal line extending along the X direction means that the signal line includes a main part and a secondary part connected to the main part, the main part is a line, a line segment or a strip-shaped body, the main part extends along the X direction, and the length of the main part extending along the X direction is greater than the length of the secondary part extending along other directions.

[0146] It should be noted that the "same layer" of the embodiments of the present disclosure can refer to a film layer on the same structure layer. Or for example, the film layers on the same layer can be layers formed by using the same film forming process to form a film layer for forming a specific pattern, and then using the same mask plate to patternize the film layer by a one-time patterning process. According to the difference of the specific pattern, the one-time patterning process can include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure can be continuous or discontinuous. These specific patterns can also be at different heights or have different thicknesses.

[0147] In the method embodiments of the present disclosure, the serial numbers of the steps cannot be used to limit the sequence of the steps, and for those skilled in the art, the changes in the sequence of the steps without creative labor are also within the protection scope of the present disclosure.

[0148] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments. In particular, for the method embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the product embodiments.

[0149] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as the common meaning thereof by those skilled in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect", "couple" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0150] It can be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly" on or under the other element, or an intervening element can also be present.

[0151] In the description of the above embodiments, the specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a proper manner.

[0152] The above description is merely illustrative of the disclosure and does not place restrictions on the protection scope of the disclosure. Any variations or replacements easily conceived by those skilled in the art within the technical scope disclosed by the disclosure should be covered by the protection scope of the disclosure. Therefore, the protection scope of the disclosure should be subject to the protection scope of the claims.

Claims

1. A display substrate, comprising: A substrate and a plurality of sub-pixels disposed on the substrate, the plurality of sub-pixels being arranged in an array and the plurality of sub-pixels being divided into multiple columns of sub-pixels; The display substrate further includes: Multiple data lines, wherein each data line is coupled to each sub-pixel in a corresponding column of sub-pixels; Multiple touch electrodes and multiple touch signal lines are provided, wherein the touch signal lines are coupled to the corresponding touch electrodes; the orthographic projection of the touch signal line on the substrate is adjacent to the orthographic projection of the corresponding data line on the substrate; the touch signal line includes a first touch portion and a second touch portion coupled together, wherein the first touch portion and the second touch portion are disposed in different layers, and the second touch portion is disposed in the same layer and with the same material as the data line; The plurality of sub-pixels are divided into multiple rows of sub-pixel rows; the display substrate also includes multiple gate lines, and the gate lines are coupled to each sub-pixel in a corresponding row of sub-pixel rows; Along the extension direction of the data line, the orthographic projection of the gate line on the substrate and the orthographic projection of the first touch portion on the substrate are arranged alternately; The data lines are alternately arranged with the sub-pixel columns; the multiple data lines include multiple first data lines and multiple second data lines, the multiple touch signal lines correspond one-to-one with the multiple first data lines, and the touch signal lines are adjacent to the corresponding first data lines; at least some of the adjacent touch signal lines and first data lines are located between two adjacent sub-pixel columns; The first data line includes a first data portion and a second data portion. Along the extension direction of the first data line, the first data portion and the second data portion are alternately arranged, and the second data portion is coupled to a control transistor in the corresponding sub-pixel. The second data line includes a third data section, a fourth data section, and a fifth data section arranged in a sequential cycle. The fourth data section is coupled to a control transistor in a corresponding sub-pixel. The orthographic projection of the fifth data section on the substrate at least partially overlaps with the orthographic projection of the gate line on the substrate. The width of the third data portion in the direction perpendicular to its own extension is greater than the width of the first data portion in the direction perpendicular to its own extension, and greater than the width of the first touch portion in the direction perpendicular to its own extension.

2. The display substrate according to claim 1, wherein, A portion of the first touch portion is located between the second touch portion and the substrate.

3. The display substrate according to claim 2, wherein, The display substrate also includes a light-shielding layer, and the first touch portion is disposed in the same layer and with the same material as the light-shielding layer.

4. The display substrate according to claim 2, wherein, The plurality of sub-pixels are divided into multiple rows of sub-pixel rows; the display substrate also includes multiple gate lines, and the gate lines are coupled to each sub-pixel in a corresponding row of sub-pixel rows; The first touch portion is made of the same layer and material as the gate line.

5. The display substrate according to claim 1, wherein, The first touch portion includes a molybdenum metal layer, an aluminum metal layer, and a molybdenum metal layer stacked sequentially in a direction away from the substrate.

6. The display substrate according to claim 1, wherein, In the same touch signal line, the ratio of the length of the first touch portion to the total length of the orthographic projection of the touch signal line onto the substrate is greater than 50%.

7. The display substrate according to claim 1, wherein, In the same touch signal line, the first touch portion and the adjacent second touch portion are coupled through a via.

8. The display substrate according to any one of claims 1 to 7, wherein, The sub-pixel also includes a pixel electrode, and the orthographic projection of the first touch portion on the substrate does not overlap with the orthographic projection of the pixel electrode on the substrate.

9. The display substrate according to any one of claims 1 to 7, wherein, The sub-pixel also includes a common electrode, and the orthographic projection of the first touch portion on the substrate at least partially overlaps with the orthographic projection of the common electrode on the substrate.

10. The display substrate according to any one of claims 1 to 7, wherein, At least a portion of the orthographic projection of the second touch portion onto the substrate overlaps with the orthographic projection portion of the gate line onto the substrate.

11. The display substrate according to any one of claims 1 to 7, wherein, The multi-column sub-pixel columns are divided into multi-column pixel unit columns, and each column of pixel unit columns includes at least two adjacent sub-pixel columns; the touch signal lines are alternately arranged with the pixel unit columns.

12. The display substrate according to any one of claims 1 to 7, wherein, The sub-pixel includes a control transistor and a pixel electrode. The gate of the control transistor is coupled to a corresponding gate line, the first electrode of the control transistor is coupled to a corresponding data line, and the second electrode of the control transistor is coupled to the pixel electrode. The display substrate further includes a light-shielding layer comprising a plurality of light-shielding patterns, wherein the orthographic projection of the light-shielding patterns on the substrate at least partially overlaps with the orthographic projection of the corresponding channel portion of the control transistor on the substrate.

13. A display device comprising a display substrate as claimed in any one of claims 1 to 12.

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