Display panel and display device

Abstract

The present invention provides a display panel and a display device. A peripheral circuit region is provided with at least one first pad group, at least one second pad group, and a plurality of first signal lines. The first pad group includes a plurality of first pads, and the second pad group includes a plurality of second pads. An end of a first signal line adjacent to a first side is electrically connected to a first pad, and an end of a first signal line adjacent to a second side is electrically connected to a second pad. The peripheral circuit region is further provided with at least one first additional pad group, the first additional pad group including a plurality of first additional pads, and the first signal line is electrically connected to the first additional pad. The vertical distance between the first additional pad group and the first side is greater than the vertical distance between the first pad group and the first side. The vertical distance between the first additional pad group and the second side is greater than the vertical distance between the second pad group and the second side. Embodiments of the present invention reduce the voltage drop in the center of the display panel and improve the phenomenon of a black screen in the center of the display panel during testing.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the continuous development of science and technology, more and more electronic devices with display functions are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] Before the display panel leaves the factory, it will undergo a dot screen test (VT test). Only the display panel with normal screen display will proceed to the next process and be bound and connected with the flexible circuit board. Summary of the Invention

[0004] The present invention provides a display panel and a display device, which can reduce the voltage drop in the center of the display panel and improve the phenomenon of a black screen in the center of the display panel during a test process.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, comprising a display area and a peripheral circuit area, wherein the peripheral circuit area is located outside the display area; the display panel comprises a first side and a second side opposite to each other;

[0006] The peripheral circuit area is provided with at least one first pad group, at least one second pad group, and a plurality of first signal lines, wherein the first pad group includes a plurality of first pads, and the second pad group includes a plurality of second pads; an end of the first signal line adjacent to the first side is electrically connected to one of the first pads, and an end of the first signal line adjacent to the second side is electrically connected to one of the second pads;

[0007] The peripheral circuit area is further provided with at least one first additional pad group, the first additional pad group includes a plurality of first additional pads, and the first signal line is electrically connected to the first additional pads;

[0008] The vertical distance between the first additional pad group and the first side is greater than the vertical distance between the first pad group and the first side; the vertical distance between the first additional pad group and the second side is greater than the vertical distance between the second pad group and the second side.

[0009] In a second aspect, an embodiment of the present invention provides a display device, comprising the display panel described in the first aspect.

[0010] An embodiment of the present invention provides a display panel, wherein one end of a first signal line is electrically connected to a first pad, and the other end of the first signal line is electrically connected to a second pad. The peripheral circuit area is further provided with at least one first additional pad group, pointing along the first side toward the second side, and the first additional pad group is located between the first pad group and the second pad group. A certain position in the middle of the first signal line is electrically connected to a first additional pad in the first additional pad group, and the first additional pad provides an electrical signal to a certain position in the middle of the first signal line, thereby reducing the voltage drop between the first side and the second side toward the center of the display panel, and improving the phenomenon of a black screen in the center of the display panel during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a top view of a display panel provided by an embodiment of the present invention;

[0012] Figure 2 for Figure 1 An enlarged schematic diagram of the middle region 50;

[0013] Figure 3 For the Figure 2 Schematic diagram of the cross-sectional structure in the AA' direction;

[0014] Figure 4 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0015] Figure 5 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0016] Figure 6 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0017] Figure 7 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0018] Figure 8 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0019] Figure 9 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0020] Figure 10 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0021] Figure 11 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0022] Figure 12A schematic cross-sectional view of another display panel provided by an embodiment of the present invention;

[0023] Figure 13 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0024] Figure 14 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0025] Figure 15 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0026] Figure 16 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0027] Figure 17 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0028] Figure 18 A top view of a portion of another display panel provided by an embodiment of the present invention;

[0029] Figure 19 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0030] Figure 20 A schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0031] Figure 21 A schematic top view of another display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] Test pads are located on the left and right lower steps of the display panel. These pads provide a test voltage to the display panel. As distance increases, the voltage drop increases. The closer to the edge of the display panel, the smaller the voltage drop. The closer to the center of the display panel, the larger the voltage drop, which can easily cause a black screen in the center of the display panel.

[0034] Figure 1 A schematic diagram of a top view of a display panel provided by an embodiment of the present invention is shown. Figure 2 for Figure 1 Enlarged schematic diagram of the S1 region, see Figure 1 and Figure 2 The display panel includes a display area 101 and a peripheral circuit area 102, and the peripheral circuit area 102 is located outside the display area 101. The display area 101 includes a plurality of pixel units for displaying images. The display panel includes a first side 201 and a second side 202 opposite to each other. The peripheral circuit area 102 is provided with at least one first pad group 11, at least one second pad group 12 and a plurality of first signal lines 31. The first pad group 11 is arranged adjacent to the first side 201, and the second pad group 12 is arranged adjacent to the second side 202. The first pad group 11 includes a plurality of first pads 110, and the second pad group 12 includes a plurality of second pads 120. One end of the first signal line 31 adjacent to the first side 201 is electrically connected to a first pad 110, and one end of the first signal line 31 adjacent to the second side 202 is electrically connected to a second pad 120.

[0035] Exemplarily, the first signal line 31 includes a first sub-signal line 311 and a second sub-signal line 312. Both the first sub-signal line 311 and the second sub-signal line 312 extend in a direction from the first side 201 to the second side 202. The first sub-signal line 311 has two ends electrically connected to the first pad 110 and the second pad 120, respectively. The second sub-signal line 312 has two ends electrically connected to the first pad 110 and the second pad 120, respectively.

[0036] The peripheral circuit area 102 is further provided with at least one first additional pad group 21. The first additional pad group 21 includes a plurality of first additional pads 210. The first signal line 31 is electrically connected to the first additional pads 210. The vertical distance between the first additional pad group 21 and the first side 201 is greater than the vertical distance between the first pad group 11 and the first side 201. The vertical distance between the first additional pad group 21 and the second side 202 is greater than the vertical distance between the second pad group 12 and the second side 202.

[0037] An embodiment of the present invention provides a display panel, wherein one end of a first signal line 31 is electrically connected to a first pad 110, and the other end of the first signal line 31 is electrically connected to a second pad 120. The peripheral circuit area 102 is further provided with at least one first additional pad group 21, pointing along the first side 201 toward the second side 202, and the first additional pad group 21 is located between the first pad group 11 and the second pad group 12. A certain position in the middle of the first signal line 31 is electrically connected to a first additional pad 210 in the first additional pad group 21, and the first additional pad 210 provides an electrical signal to a certain position in the middle of the first signal line 31. The voltage drop in the direction from the first side 201 and the second side 202 toward the center of the display panel is reduced, thereby improving the phenomenon of a black screen in the center of the display panel during testing.

[0038] Figure 3 For the Figure 2Schematic diagram of the cross-section structure in the AA' direction, refer to Figure 1-Figure 3 The display panel further includes a substrate 60, on which the first pad group 11, the second pad group 12, the first additional pad group 21, and the first signal line 31 are all located. The first pad group 11, the second pad group 12, and the first additional pad group 21 are all located in the first metal layer M1. That is, the first pad group 11, the second pad group 12, and the first additional pad group 21 are formed by patterned etching of the first metal layer M1. The first signal line 31 is located in the signal line layer M2. That is, the first signal line 31 is formed by patterned etching of the signal line layer M2. Perpendicular to the substrate 60, the first metal layer M1 is located between the substrate 60 and the signal line layer M2. The vertical distance between any one of the first pad group 11, the second pad group 12, and the first additional pad group 21 and the substrate 60 is less than the vertical distance between the first signal line 31 and the substrate 60.

[0039] The display panel also includes a plurality of connecting lines 33, one end of the connecting line 33 is electrically connected to the first signal line 31, and the other end of the connecting line 33 is electrically connected to the first additional pad 210. The first signal line 31 is electrically connected to the first additional pad 210 through the connecting line 33. The connecting line 33 is located in the line-changing layer M3. Perpendicular to the direction of the substrate 60, the line-changing layer M3 is located on the side of the first metal layer M1 away from the substrate 60. The vertical distance between any one of the first pad group 11, the second pad group 12 and the first additional pad group 21 and the substrate 60 is smaller than the vertical distance between the connecting line 33 and the substrate 60. The line-changing layer M3 is in a different layer from the signal line layer M2, thereby avoiding the first signal line 31 and the connecting line 33 from being electrically connected due to crossing in the same layer, and avoiding the connecting line 33 from electrically connecting the two first signal lines 31.

[0040] Illustratively, the first sub-signal line 311 is electrically connected to the first additional pad 210 via a connecting line 33. The connecting line 33 electrically connected to the first sub-signal line 311 crosses the second sub-signal line 312, and the wiring layer M3 is on a different layer from the signal line layer M2, thereby preventing the connecting line 33 electrically connected to the first sub-signal line 311 from being electrically connected to the second sub-signal line 312.

[0041] Optionally, refer to Figure 3 , perpendicular to the direction of the substrate 60 , the line switching layer M3 is located on the side of the signal line layer M2 away from the substrate 60 . The vertical distance between the first signal line 31 and the substrate 60 is smaller than the vertical distance between the connecting line 33 and the substrate 60 .

[0042] Figure 4 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 4 The display panel further includes an anode 70, which is also called a pixel electrode. The anode 70 and the common electrode ( Figure 7The voltage difference formed between the signal line layer M2 and the anode 70 drives the pixel unit to emit light.

[0043] For example, refer to Figure 4 , the display panel includes a thin film transistor 80 and a storage capacitor 90. The thin film transistor 80 includes a gate 83, a source 81, a drain 84 and a semiconductor layer 82. The storage capacitor 90 includes a first electrode 91 and a second electrode 92. The anode 70 is located on the side of the thin film transistor 80 away from the substrate 60 and is electrically connected to the drain 84 of the thin film transistor 80. The gate 83 of the thin film transistor 80 and the first electrode 91 of the storage capacitor 90 are both located in the first metal layer M1, and the gate 83 of the thin film transistor 80, the first electrode 91 of the storage capacitor 90, the first pad group 11, the second pad group 12 and the first additional pad group 21 are arranged in the same layer. The source 81 and the drain 84 of the thin film transistor 80 are located in the signal line layer M2, and the source 81 and the drain 84 of the thin film transistor 80 are both arranged in the same layer as the first signal line 31. The first signal line 31 can be made of the same material as the source 81 and drain 84 of the thin-film transistor 80 to reduce the resistivity of the first signal line 31 and reduce the voltage drop across the first signal line 31. The line switching layer M3 is located between the signal line layer M2 and the anode 70. The line switching layer M3 is a metal layer added between the thin-film transistor 80 and the anode 70 to reduce the resistivity of the connecting line 33 and reduce the voltage drop across the connecting line 33.

[0044] Figure 5 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 5 Anode 70 is located in the wiring layer M3. Anode 70 is provided on the same layer as connecting wire 33, thereby not increasing the thickness of the display panel. Furthermore, since anode 70 and connecting wire 33 are provided on the same layer, the same material and process can be used to form anode 70 and connecting wire 33, thereby saving manufacturing steps.

[0045] Figure 6 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 6 The gate electrode 83 of the thin film transistor 80, the first electrode plate 91 of the storage capacitor 90, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged on the same layer. The second electrode plate 92 of the storage capacitor 90 is located in the signal line layer M2, and the second electrode plate 92 of the storage capacitor 90 is arranged on the same layer as the first signal line 31. The first signal line 31 can be made of the same material as the second electrode plate 92 of the storage capacitor 90. The connecting line 33 is located on the side of the thin film transistor 80 away from the substrate 60.

[0046] Figure 7 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 7 The second electrode 92 of the storage capacitor 90 is located on the first metal layer M1. The second electrode 92 of the storage capacitor 90, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged on the same layer. The first pad group 11, the second pad group 12, and the first additional pad group 21 can be made of the same material as the second electrode 92 of the storage capacitor 90. The source 81 and drain 84 of the thin film transistor 80 are arranged on the same layer as the first signal line 31. The connecting line 33 is located on the side of the thin film transistor 80 away from the substrate 60.

[0047] Figure 8 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 8 The switching layer M3 is located between the first metal layer M1 and the signal layer M2 in a direction perpendicular to the substrate 60 . The vertical distance between the first signal line 31 and the substrate 60 is greater than the vertical distance between the connecting line 33 and the substrate 60 .

[0048] Figure 9 This is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. In a direction perpendicular to the substrate 60 , the signal line layer M2 is located between the switching layer M3 and the anode 70 .

[0049] For example, refer to Figure 9 , the gate electrode 83 of the thin film transistor 80, the first electrode 91 of the storage capacitor 90, the first pad group 11, the second pad group 12 and the first additional pad group 21 are arranged in the same layer. The source electrode 81 and the drain electrode 84 of the thin film transistor 80 are located in the line switching layer M3, and the source electrode 81 and the drain electrode 84 of the thin film transistor 80 are both arranged in the same layer as the connecting line 33. The connecting line 33 can be made of the same material as the source electrode 81 and the drain electrode 84 of the thin film transistor 80 to reduce the resistivity of the connecting line 33 and reduce the voltage drop on the connecting line 33. The signal line layer M2 is located between the line switching layer M3 and the anode 70. The signal line layer M2 is a metal layer added between the thin film transistor 80 and the anode 70 to reduce the resistivity of the first signal line 31 and reduce the voltage drop on the first signal line 31.

[0050] Figure 10 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 10 The second electrode 92 of the storage capacitor 90, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged on the same layer. The source 81 and drain 84 of the thin film transistor 80 are arranged on the same layer as the connection line 33. The first signal line 31 is located between the thin film transistor 80 and the anode 70.

[0051] Figure 11 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 11The gate electrode 83 of the thin film transistor 80, the first electrode plate 91 of the storage capacitor 90, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged on the same layer. The second electrode plate 92 of the storage capacitor 90 is arranged on the same layer as the connecting line 33. The first signal line 31 is located between the thin film transistor 80 and the anode 70.

[0052] Figure 12 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 12 The gate electrode 83 of the thin film transistor 80, the first electrode plate 91 of the storage capacitor 90, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged on the same layer. The second electrode plate 92 of the storage capacitor 90 is arranged on the same layer as the connecting line 33. The source electrode 81 and the drain electrode 84 of the thin film transistor 80 are arranged on the same layer as the first signal line 31.

[0053] Optionally, continue to refer to Figure 1 , the peripheral circuit area 102 includes a step area 1021. The step area 1021 can be provided with a bonding pad group ( Figure 1 The driver chip and / or flexible circuit board are bonded to the display panel and electrically connected to the bonding pads in the bonding pad group. The first signal line 31, the first pad group 11, the second pad group 12 and the first additional pad group 21 are all located in the step area 1021.

[0054] For example, refer to Figure 1 The display panel further includes a third side 203 and a fourth side 204. The third side 203 and the fourth side 204 are opposite each other. The third side 203 connects the first side 201 and the second side 202, and the fourth side 204 connects the first side 201 and the second side 202. The first signal line 31, the first pad group 11, the second pad group 12, and the first additional pad group 21 are arranged adjacent to the fourth side 204.

[0055] Figure 13 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 13 The peripheral circuit area 102 includes a step area 1021 and a step-opposite area 1022. The step area 1021 and the step-opposite area 1022 are opposite each other. The display area 101 is located between the step area 1021 and the step-opposite area 1022. The first signal line 31, the first pad group 11, the second pad group 12, and the first additional pad group 21 are all located in the step-opposite area 1022.

[0056] For example, refer to Figure 13 The first signal line 31 , the first pad group 11 , the second pad group 12 and the first additional pad group 21 are arranged adjacent to the third side 203 .

[0057] Figure 14This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 14 The display panel includes two first pad groups 11, two second pad groups 12, and at least two first additional pad groups 21. A portion of the plurality of first signal lines 31, one first pad group 11, one second pad group 12, and at least one first additional pad group 21 are located in the step area 1021. Another portion of the plurality of first signal lines 31, one first pad group 11, one second pad group 12, and at least one first additional pad group 21 are located in the step-opposite area 1022. In the embodiment of the present invention, the plurality of first signal lines 31 are arranged in the step area 1021 and the step-opposite area 1022. For each first signal line 31 in the step area 1021, one first pad group 11, one second pad group 12, and at least one first additional pad group 21 are correspondingly provided. For each first signal line 31 in the step-opposite area 1022, one first pad group 11, one second pad group 12, and at least one first additional pad group 21 are correspondingly provided.

[0058] For example, refer to Figure 14 The first signal line 31 includes a first sub-signal line 311, a second sub-signal line 312, a third sub-signal line 313, and a fourth sub-signal line 314. The first sub-signal line 311 and the second sub-signal line 312 are located in the step area 1021. The third sub-signal line 313 and the fourth sub-signal line 314 are located in the step opposite side area 1022.

[0059] Optionally, refer to Figure 13 and Figure 14 When the display panel is cut, the first signal line 31, the first pad group 11, the second pad group 12 and the first additional pad group 21 located in the step opposite side area 1022 are cut and removed. Therefore, after the display panel is cut, the first signal line 31, the first pad group 11, the second pad group 12 and the first additional pad group 21 will not occupy the space of the step opposite side area 1022, thereby reducing the area of ​​the step opposite side area 1022 and reducing the border of the display panel.

[0060] Figure 15 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 15The display panel further includes at least one second signal line 32, a third pad group 13, and a fourth pad group 14. The third pad group 13 includes at least one third pad 130, and the fourth pad group 14 includes at least one fourth pad 140. At least part of the plurality of first signal lines 31 is located in the step area 1021. The second signal line 32 is located in the step opposite side area 1022, and one end of the second signal line 32 adjacent to the first side 201 is electrically connected to one third pad 130, and one end of the second signal line 32 adjacent to the second side 202 is electrically connected to one fourth pad 140. Both ends of the second signal line 32 are electrically connected to the third pad 130 and the fourth pad 140, respectively. There is at least one first signal line 31 and the second signal line 32 that transmit the same electrical signal. In an embodiment of the present invention, a second signal line 32 is added to the area 1022 on the opposite side of the step, and the same electrical signal is provided to the display area 101 through the first signal line 31 and the second signal line 32 on both sides of the display area 101, thereby improving the driving capability of the display panel, reducing the voltage drop in the direction from the third side 203 and the fourth side 204 toward the center of the display panel, and improving the phenomenon of a black screen in the center of the display panel during the test.

[0061] For example, the second signal line 32 can be provided in the same layer and formed in the same process using the same material as the first signal line 31. The first pad group 11, the second pad group 12, the third pad group 13 and the fourth pad group 14 are provided in the same layer and formed in the same process using the same material.

[0062] Figure 16 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 16 At least one second additional pad group 22 is further provided in the step-opposite side region 1022. The second additional pad group 22 includes at least one second additional pad 220, and the second signal line 32 is electrically connected to the second additional pad 220. The vertical distance between the second additional pad group 22 and the first side 201 is greater than the vertical distance between the third pad group 13 and the first side 201. The vertical distance between the second additional pad group 22 and the second side 202 is greater than the vertical distance between the fourth pad group 14 and the second side 202. In this embodiment of the present invention, one end of the second signal line 32 is electrically connected to the third pad 130, and the other end of the second signal line 32 is electrically connected to the fourth pad 140. At least one second additional pad group 22 is provided in the step-opposite side region 1022, pointing along the first side 201 toward the second side 202. The second additional pad group 22 is located between the third pad group 13 and the fourth pad group 14. A certain position in the middle of the second signal line 32 is electrically connected to the second additional pad 220 in the second additional pad group 22. The second additional pad 220 provides an electrical signal to a certain position in the middle of the second signal line 32, thereby reducing the voltage drop in the center of the display panel and improving the black screen phenomenon in the center of the display panel during the test.

[0063] Optionally, refer to Figure 16 , the first signal line 31 includes a constant voltage signal line, and the voltage on the constant voltage signal line is a constant value. A constant voltage value is provided to the display area 101 through the first signal line 31. The constant voltage signal line is usually used to provide a power supply voltage. The current it generates is large, and the voltage drop it generates is large, which makes it more likely that the center of the display panel will go black during the test. In particular, the first additional pad group 21 provided in the embodiment of the present invention is needed to reduce the voltage drop in the direction of the first side 201 and the second side 202 toward the center of the display panel, thereby improving the phenomenon of a black screen in the center of the display panel during the test.

[0064] Optionally, refer to Figure 16 The first signal line 31 may include a switch control signal line and a test signal line. The switch control signal line is used to provide a switch control signal. For example, the switch control signal line is electrically connected to the gate of the thin film transistor to control the conduction and cutoff of the thin film transistor. The test signal line is used to provide a test signal. For example, the test signal line is used to provide an R test signal, a G test signal, and a B test signal. The R test signal, the G test signal, and the B test signal are used to light up the red pixel unit, the green pixel unit, and the blue pixel unit in the display area 101, respectively.

[0065] Optionally, refer to Figure 16 The second signal line 32 includes a constant voltage signal line, and the voltage on the constant voltage signal line is a constant value. Because the constant voltage signal line is generally used to provide a power supply voltage, the resulting voltage drop is relatively large. In particular, the second signal line 32 provided in the embodiment of the present invention is required to provide the same electrical signal to the display area 101 via the first signal line 31 and the second signal line 32 on both sides of the display area 101, thereby reducing the voltage drop in the direction from the third side 203 and the fourth side 204 toward the center of the display panel, thereby improving the phenomenon of a black screen in the center of the display panel during testing.

[0066] Optionally, the constant voltage signal line includes at least one of a reference voltage signal line, a positive power signal line, a negative power signal line, a high level signal line, and a low level signal line. The reference voltage signal line is used to provide a reference voltage, the positive power voltage line is used to provide a positive power voltage, and the negative power signal line is used to provide a negative power voltage.

[0067] Optionally, refer to Figure 16 When the display panel is cut, the second signal line 32, the third pad group 13, the fourth pad group 14 and the second additional pad group 22 located in the step opposite side area 1022 are cut and removed. Therefore, after the display panel is cut, the second signal line 32, the third pad group 13, the fourth pad group 14 and the second additional pad group 22 will not occupy the space of the step opposite side area 1022, thereby reducing the area of ​​the step opposite side area 1022 and reducing the border of the display panel.

[0068] Figure 17 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 17 , the first signal line 31 and the second signal line 32 both include constant voltage signal lines. The constant voltage signal line includes a reference voltage signal line. The display panel also includes a plurality of reference voltage branches 34, and the plurality of reference voltage branches 34 extend from the display area 101 to the peripheral circuit area 102. The plurality of reference voltage branches 34 are electrically connected to the reference voltage signal lines and are arranged in a direction from the first side 201 to the second side 202. In an embodiment of the present invention, the plurality of reference voltage branches 34 are electrically connected to the first signal line 31 and / or the second signal line 32, and the electrical signal provided to the display area 101 through the first signal line 31 and / or the second signal line 32 is provided to the display area 101 by the plurality of reference voltage branches 34 arranged in a direction from the first side 201 to the second side 202, thereby reducing the voltage drop in the direction from the first side 201 and the second side 202 toward the center of the display panel, and improving the phenomenon of a black screen in the center of the display panel during the test.

[0069] Figure 18 A partial top view of another display panel provided by an embodiment of the present invention, referring to Figure 18 The first additional pad group 21 includes two sub-pad groups, and the first additional pads 210 in the two sub-pad groups are connected to the same connection point on the first signal line 31 .

[0070] Exemplarily, the two sub-pad groups are respectively recorded as the first sub-pad group 211 and the second sub-pad group 212. A connection point on the first signal line 31 is electrically connected to a first additional pad 210 in the first sub-pad group 211 and a first additional pad 210 in the second sub-pad group 212.

[0071] Figure 19 This is a schematic top view of another display panel provided by an embodiment of the present invention. The peripheral circuit area 102 is further provided with a bonding pad group 40, which includes a plurality of bonding pads 410. Along the direction from the first side 201 to the second side 202, at least one first additional pad group 21 is located between the first pad group 11 and the bonding pad group 40. At least one first additional pad group 21 is located between the second pad group 12 and the bonding pad group 40.

[0072] In other embodiments, the first additional pad group 21 may be provided only between the first pad group 11 and the bonding pad group 40 , or the first additional pad group 21 may be provided only between the second pad group 12 and the bonding pad group 40 .

[0073] For example, refer to Figure 19The step area 1021 includes a fan-shaped area 1023 , in which a fan-shaped trace may be provided. The fan-shaped trace is used to electrically connect the binding pad 410 with the signal line in the display area 101 . Figure 19 The display panel shown is provided with one sector 1023. In other embodiments, a display panel with a relatively large area needs to be provided with at least two sector 1023. A display panel with a relatively large area can be, for example, a computer display screen, a vehicle display screen, and a display screen.

[0074] Figure 20 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 20 The peripheral circuit area 102 includes two binding pad groups 40, namely a first binding pad group 41 and a second binding pad group 42. The first binding pad group 41 and the second binding pad group 42 each include a plurality of binding pads 410. The first binding pad group 41 is electrically connected to the fan-shaped trace in one fan-shaped area 1023, and the second binding pad group 42 is electrically connected to the fan-shaped trace in another fan-shaped area 1023. The area between the first binding pad group 41 and the second binding pad group 42 is farther away from the first side 201 and farther away from the second side 202. Along the direction from the first side 201 to the second side 202, at least one first additional pad group 21 is provided between the first binding pad group 41 and the second binding pad group 42 to reduce the voltage drop in the direction of the first side 201 and the second side 202 toward the center of the display panel, thereby improving the phenomenon of a black screen in the center of the display panel during the test.

[0075] Figure 21 This is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, referring to Figure 21 Along the direction from the first side 201 to the second side 202, the first bonding pad group 41 is located between the first bonding pad group 11 and the second bonding pad group 42, and the second bonding pad group 42 is located between the first bonding pad group 41 and the second side 202. Along the direction from the first side 201 to the second side 202, at least one first additional pad group 21 is provided between the first bonding pad group 11 and the first bonding pad group 41. At least one first additional pad group 21 is provided between the second bonding pad group 12 and the second bonding pad group 42.

[0076] In other embodiments, at least one first additional pad group 21 may be provided only between the first pad group 11 and the first bonding pad group 41 , or at least one first additional pad group 21 may be provided only between the second pad group 12 and the second bonding pad group 42 .

[0077] An embodiment of the present invention further provides a display device, which includes the display panel in the above embodiment. The display device can be a computer, a mobile phone, a tablet computer, etc.

[0078] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a peripheral circuit area, wherein the peripheral circuit area is located outside the display area; the display panel comprises a first side and a second side opposite to each other; The peripheral circuit area is provided with at least one first pad group, at least one second pad group, and a plurality of first signal lines, wherein the first pad group includes a plurality of first pads, and the second pad group includes a plurality of second pads; an end of the first signal line adjacent to the first side is electrically connected to one of the first pads, and an end of the first signal line adjacent to the second side is electrically connected to one of the second pads; The peripheral circuit area is further provided with at least one first additional pad group, the first additional pad group includes a plurality of first additional pads, and the first signal line is electrically connected to the first additional pads; The vertical distance between the first additional pad group and the first side is greater than the vertical distance between the first pad group and the first side; the vertical distance between the first additional pad group and the second side is greater than the vertical distance between the second pad group and the second side; The peripheral circuit area includes a step area and an area opposite to the step, and the step area is opposite to the area opposite to the step; Also comprising at least one second signal line, a third pad group and a fourth pad group, wherein the third pad group includes at least one third pad, and the fourth pad group includes at least one fourth pad; The second signal line is located in the area opposite the step, one end of the second signal line adjacent to the first side is electrically connected to one of the third pads, and one end of the second signal line adjacent to the second side is electrically connected to one of the fourth pads; there is at least one of the first signal line and the second signal line that transmits the same electrical signal.

2. The display panel according to claim 1, wherein: Also included is a substrate, wherein the first pad group, the second pad group, the first additional pad group, and the first signal line are all located on the substrate; The first pad group, the second pad group and the first additional pad group are all located in a first metal layer; the first signal line is located in a signal line layer; perpendicular to the direction of the substrate, the first metal layer is located between the substrate and the signal line layer; The display panel also includes a plurality of connecting lines, one end of each connecting line is electrically connected to the first signal line, and the other end of each connecting line is electrically connected to the first additional pad; the connecting line is located in a line-changing layer; perpendicular to the direction of the substrate, the line-changing layer is located on the side of the first metal layer away from the substrate, and is in a different layer from the signal line layer.

3. The display panel according to claim 2, wherein: The line switching layer is located perpendicular to the direction of the substrate and on a side of the signal line layer away from the substrate.

4. The display panel according to claim 3, wherein: It also includes an anode, which is perpendicular to the direction of the substrate, and the line switching layer is located between the signal line layer and the anode.

5. The display panel according to claim 3, wherein: It also includes an anode, which is located in the line-changing layer.

6. The display panel according to claim 2, wherein: The line switching layer is located between the first metal layer and the signal line layer in a direction perpendicular to the substrate.

7. The display panel according to claim 6, wherein: It also includes an anode, which is perpendicular to the direction of the substrate, and the signal line layer is located between the line layer and the anode.

8. The display panel according to claim 1, wherein: The first signal line, the first pad group, the second pad group, and the first additional pad group are all located in the step area.

9. The display panel according to claim 1, wherein: The first signal line, the first pad group, the second pad group, and the first additional pad group are all located in the area opposite to the step.

10. The display panel according to claim 1, wherein comprising two of the first pad groups, two of the second pad groups, and at least two of the first additional pad groups; A portion of the plurality of first signal lines, one first pad group, one second pad group, and at least one first additional pad group are located in the step area; Another portion of the plurality of first signal lines, one first pad group, one second pad group, and at least one first additional pad group are located in the area opposite to the step.

11. The display panel according to claim 1, wherein The step-opposite side area is further provided with at least one second additional pad group, the second additional pad group includes at least one second additional pad, and the second signal line is electrically connected to the second additional pad; The vertical distance between the second additional pad group and the first side is greater than the vertical distance between the third pad group and the first side; the vertical distance between the second additional pad group and the second side is greater than the vertical distance between the fourth pad group and the second side.

12. The display panel according to claim 1, wherein The first signal line includes a constant voltage signal line, and the voltage on the constant voltage signal line is a constant value.

13. The display panel according to claim 12, wherein: The first signal line further includes a switch control signal line and a test signal line.

14. The display panel according to claim 1, wherein The second signal line includes a constant voltage signal line, and the voltage on the constant voltage signal line is a constant value.

15. The display panel according to claim 12 or 14, characterized in that: The constant voltage signal line includes at least one of a reference voltage signal line, a positive power signal line, a negative power signal line, a high level signal line, and a low level signal line.

16. The display panel according to claim 12 or 14, characterized in that: The constant voltage signal line includes a reference voltage signal line; The display panel further includes a plurality of reference voltage branches extending from the display area to the peripheral circuit area, electrically connected to the reference voltage signal lines, and arranged in a direction from the first side to the second side.

17. The display panel according to claim 9 or 10, characterized in that: When the display panel is cut, the first signal line, the first pad group, the second pad group, and the first additional pad group located in the area opposite to the step are cut and removed.

18. The display panel according to claim 1, wherein The first additional pad group includes two sub-pad groups, and the first additional pads in the two sub-pad groups are connected to the same connection point on the first signal line.

19. The display panel according to claim 1, wherein The peripheral circuit area is further provided with a binding pad group, and the binding pad group includes a plurality of binding pads; Along the direction from the first side to the second side, the first additional pad group is located between the first pad group and the bonding pad group, and / or the first additional pad group is located between the second pad group and the bonding pad group.

20. The display panel according to claim 1, wherein The peripheral circuit area is further provided with a first binding pad group and a second binding pad group, wherein the first binding pad group and the second binding pad group each include a plurality of binding pads; Along the direction from the first side to the second side, at least one first additional pad group is disposed between the first bonding pad group and the second bonding pad group.

21. The display panel according to claim 20, wherein: Along the direction from the first side to the second side, the first bonding pad group is located between the first bonding pad group and the second bonding pad group; Along the direction from the first side to the second side, at least one first additional pad group is set between the first pad group and the first binding pad group, and / or at least one first additional pad group is set between the second pad group and the second binding pad group.

22. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 21.

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