Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate, a first metal layer and a second metal layer which are sequentially laminated. The first metal layer comprises a first wire and a second wire, the second metal layer comprises a third wire and a fourth wire, the orthographic projection of the first wire on the substrate is at least partially overlapped with the orthographic projection of the third wire on the substrate, and the orthographic projection of the second wire on the substrate is at least partially overlapped with the orthographic projection of the fourth wire on the substrate; the two adjacent driving units in the same column are electrically connected with the wires in the different metal layers, so that the RC loads of the two adjacent columns of driving units are the same while the pixel density of the display panel is improved, and the problem of uneven display of the display panel is solved.

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] Today, the pixel density (Pixels Per Inc, PPI) of mobile phone OLED (Organic Light-Emitting Diode) display screens is about four or five hundred, but this PPI is far from meeting the requirements of near-eye display. Therefore, for VR (Virtual Reality) display technology and AR (Augmented Reality) display technology, the PPI of current traditional mobile phone display screens is far from enough. Summary of the invention

[0003] The object of the present invention is to provide a display panel and a display device to solve the technical problem that the PPI in the existing display technology cannot meet the requirements.

[0004] To achieve the above object, the present invention provides a display panel, the display panel comprising a substrate, a first metal layer and a second metal layer. The substrate comprises a plurality of drive units arranged in an array, the drive units comprising a first drive unit, a second drive unit, a third drive unit and a fourth drive unit. The first metal layer is arranged on the substrate, and comprises a plurality of first routing lines and a plurality of second routing lines, the first routing lines are electrically connected to the first drive units whose coordinates are odd rows and odd columns, and the second routing lines are electrically connected to the second drive units whose coordinates are even rows and even columns. The second metal layer is arranged on the side of the first metal layer away from the substrate, and comprises a plurality of third routing lines and a plurality of fourth routing lines, the third routing lines are electrically connected to the third drive units whose coordinates are odd rows and even columns, and the fourth routing lines are electrically connected to the fourth drive units whose coordinates are even rows and odd columns. The orthographic projection of the first routing line on the substrate at least partially overlaps with the orthographic projection of the third routing line on the substrate. The orthographic projection of the second routing line on the substrate at least partially overlaps with the orthographic projection of the fourth routing line on the substrate.

[0005] Further, at least part of the orthographic projections of the first routing line, the second routing line, the third routing line and the fourth routing line on the substrate are located between two adjacent columns of the driving units.

[0006] Further, the first routing line includes a first main line and a second branch line. The first main line extends along a first direction. The first branch line extends along a second direction perpendicular to the first direction, and is electrically connected to the first main line and the first driving unit. The third routing line includes a third main line and a third branch line. The third main line extends along the first direction. The third branch line extends along the second direction, and is electrically connected to the third main line and the third driving unit. Preferably, the orthographic projection of the first main line on the substrate overlaps with the orthographic projection of the third main line on the substrate. Preferably, the orthographic projection of the first branch line on the substrate and the orthographic projection of the third branch line on the substrate are symmetrical to each other and do not overlap with each other.

[0007] Further, the second routing line includes a second main line and a second branch line. The second main line extends along a first direction. The second branch line extends along a second direction perpendicular to the first direction, and is electrically connected to the second main line and the second driving unit. The fourth routing line includes a fourth main line and a fourth branch line. The fourth main line extends along the first direction. The fourth branch line extends along the second direction, and is electrically connected to the fourth main line and the fourth driving unit. Preferably, the orthographic projection of the second main line on the substrate overlaps with the orthographic projection of the fourth main line on the substrate. Preferably, the orthographic projection of the second branch line on the substrate and the orthographic projection of the fourth branch line on the substrate are symmetrical to each other and do not overlap with each other.

[0008] Furthermore, the first routing line is electrically connected to the second routing line, and the third routing line is electrically connected to the fourth routing line, and the third routing line is electrically connected to the fourth routing line, and the third routing line is electrically connected to the fourth routing line, and the third routing line is electrically connected to the fourth routing line.

[0009] Further, an insulating layer is provided between the first metal layer and the second metal layer, and a plurality of first vias and a plurality of second vias are provided in the insulating layer. The first routing line is electrically connected to the fourth routing line through the first vias. The second routing line is electrically connected to the third routing line through the second vias. Preferably, the line widths of the first routing line, the second routing line, the third routing line and the fourth routing line are all smaller than the spacing between the first vias and the adjacent second vias.

[0010] Further, a first connecting line and a fourth connecting line are provided between the adjacent first routing line and the fourth routing line, the first connecting line intersects with the first routing line, and the fourth connecting line intersects with the fourth routing line. The orthographic projections of the first connecting line and the fourth connecting line on the insulating layer have a first overlapping area, at least one of the first vias is provided in the first overlapping area, and the first routing line and the fourth routing line are electrically connected in the first via.

[0011] Further, a second connecting line and a third connecting line are provided between the adjacent second routing lines and the third routing lines, the second connecting line intersects with the second routing lines, and the third connecting line intersects with the third routing lines. The orthographic projections of the second connecting line and the third connecting line on the insulating layer have a first overlapping area, at least one second via is provided in the first overlapping area, and the second routing line and the third routing line are electrically connected in the second via.

[0012] Furthermore, the display panel also includes a plurality of connection holes, one side of each driving unit is provided with the connection hole, and the first wiring, the second wiring, the third wiring and the fourth wiring are electrically connected to the corresponding driving unit through the connection holes.

[0013] The present invention further provides a display device, which includes the display panel as described above.

[0014] The advantages of the present invention are as follows: a display panel and a display device of the present invention reduce the wiring area occupied by the signal lines of the display panel by stacking the signal lines, thereby increasing the arrangement area of ​​the drive units and improving the pixel density of the display panel. At the same time, in the embodiment of the present invention, two adjacent drive units in the same column are electrically connected to the signal lines in different metal layers, so that the RC loads of the drive units in the two adjacent columns are the same, thereby solving the problem of uneven display of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a schematic plan view of a display panel in Embodiment 1 of the present invention;

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of the display panel is shown in Box A;

[0018] Figure 3 for Figure 2 The cross-sectional structure diagram of the display panel at the AA' line;

[0019] Figure 4 This is a schematic diagram of the connection between the first signal line and the second signal line in Embodiment 1 of the present invention;

[0020] Figure 5is a schematic plan view of a display panel in Embodiment 1 of the present invention;

[0021] Figure 6 for Figure 1 An enlarged schematic diagram of the display panel is shown in Box A;

[0022] Figure 7 for Figure 5 The cross-sectional structure diagram of the display panel at the AA' line;

[0023] Figure 8 for Figure 6 The cross-sectional structure diagram of the display panel at the BB' line;

[0024] Fig. 9 This is a schematic diagram of the connection between the first signal line and the second signal line in Embodiment 2 of the present invention.

[0025] The components in the figure are shown as follows:

[0026] Display panel 1; Substrate 10;

[0027] Driving unit 11; Connecting hole 12;

[0028] A first metal layer 20; A first trace 21;

[0029] A first trunk line 211; A first branch line 212;

[0030] Second routing line 22; Second trunk line 221;

[0031] The second branch line 222; The first connecting line 23;

[0032] A second connecting line 24; A second metal layer 30;

[0033] The third routing line 31; The third trunk line 311;

[0034] A third branch line 312; A fourth line 32;

[0035] A fourth trunk line 321; A fourth branch line 322;

[0036] A third connecting line 33; A fourth connecting line 34;

[0037] Insulating layer 40; First via hole 41;

[0038] A second via hole 42; A first overlapping region 43;

[0039] Second overlapping region 44; Organic hole 50;

[0040] First signal line 2; Second signal line 3;

[0041] Driver chip 4. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below with reference to the drawings in the specification to prove that the present invention can be implemented. The embodiments of the invention can fully introduce the present invention to those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied through many different forms of embodiments of the invention, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0043] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0044] In addition, the following descriptions of the various embodiments of the invention are made with reference to the attached diagrams to illustrate specific embodiments of the invention that the present invention can be implemented with. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0046] In related display technologies, in order to improve the PPI of the display panel, the most common approach is to compress the line width and line spacing to the process limit to minimize the pitch of the driving unit. However, for the production line of a specific AMOLED (Active-matrix organic light-emitting diode) display product, the line width and line spacing in its products have limit values ​​and cannot be further compressed. Another approach is to mirror the driving unit of a specific column, and the driving units that are not mirrored and mirrored use different layers of routing for signal transmission, and then the two layers of routing are stacked vertically. However, in this solution, since the routing lines connecting the two adjacent columns are on different layers and in different environments, their RC loads are also different, which can easily cause the display screen to have column-wise display unevenness (mura) problems.

[0047] Example 1

[0048] Based on the technical problems existing in the related display technologies, an embodiment of the present invention provides a display panel 1, such as Figure 1 , Figure 2 and Figure 3 As shown in , the display panel 1 comprises a substrate 10 , a first metal layer 20 and a second metal layer 30 .

[0049] The substrate 10 is an array substrate, which includes a plurality of drive units 11 arranged in an array along a first direction X and a second direction Y perpendicular to each other, each drive unit 11 includes a plurality of TFT (Thin Film Transistor) devices, and a plurality of TFT devices are connected to form a pixel circuit, which can be one of other types of pixel circuits such as 7T1C (7 TFT devices and 1 capacitor), 5T2C (5 TFT devices and 2 capacitors), 3T2C (3 TFT devices and 2 capacitors), 2T1C (2 TFT devices and 1 capacitor). The pixel circuit drives the light-emitting device connected to the pixel circuit to light up or turn off according to the received display signal, thereby realizing the display and switching of the picture.

[0050] The first metal layer 20 and the second metal layer 30 are stacked on the substrate 10. The first metal layer 20 and the second metal layer 30 each include a plurality of signal traces, which are electrically connected to the corresponding driving unit 11 and transmit corresponding display signals to the pixel circuit in the driving unit 11. The first metal layer 20 is insulated and arranged on one side of the substrate 10, and the second metal layer 30 is insulated and arranged on the side of the first metal layer 20 away from the substrate 10. The driving unit 11 includes a first driving unit 111 with coordinates of odd rows and odd columns, a second driving unit 112 with coordinates of even rows and even columns, a third driving unit 113 with coordinates of odd rows and even columns, and a fourth driving unit 114 with coordinates of even rows and odd columns.

[0051] like Figure 2 and Figure 4 As shown in , the first metal layer 20 includes a plurality of first wirings 21 and a plurality of second wirings 22, and the first wirings 21 and the second wirings 22 are arranged alternately, that is, the first wirings 21 and the second wirings 22 are in the same layer and are provided with the same material. Among them, the first wirings 21 are electrically connected to the first driving units 111 whose coordinates are odd rows and odd columns, and the second wirings 22 are electrically connected to the second driving units 112 whose coordinates are even rows and even columns.

[0052] The second metal layer 30 includes a plurality of third routing lines 31 and a plurality of fourth routing lines 32, and the third routing lines 31 and the fourth routing lines 32 are arranged alternately, that is, the third routing lines 31 and the fourth routing lines 32 are arranged in the same layer and with the same material. Among them, the third routing lines 31 are electrically connected to the third driving units 113 whose coordinates are odd rows and even columns, and the fourth routing lines 32 are electrically connected to the fourth driving units 114 whose coordinates are even rows and odd columns.

[0053] The first wiring 21 and the second wiring 22 are electrically connected and combined to form a first signal line 2, the third wiring 31 and the fourth wiring 32 are electrically connected and combined to form a second signal line 3, the first signal line 2 and the second signal line 3 are both used as data signal lines for transmitting data (Data) signals, and one end thereof away from the driving unit 11 is electrically connected to the driving chip 4 located in the non-display area of ​​the display panel 1. Among them, the orthographic projection of the first wiring 21 on the substrate 10 overlaps with the orthographic projection of the third wiring 31 on the substrate 10 at least partially, the orthographic projection of the second wiring 22 on the substrate 10 overlaps with the orthographic projection of the fourth wiring 32 on the substrate 10 at least partially, and at least part of the orthographic projections of the first wiring 21, the second wiring 22, the third wiring 31 and the fourth wiring 32 on the substrate 10 are located between two adjacent columns of driving units 11.

[0054] The first wiring 21 has a first trunk line 211 and a first branch line 212. The first trunk line 211 extends along a first direction X, and at least one end thereof is electrically connected to an adjacent second wiring 22. The first branch line 212 extends along a second direction Y perpendicular to the first direction X, and one end thereof is electrically connected to the first trunk line 211, and the other end thereof is electrically connected to the corresponding first driving unit 111 in the substrate 10.

[0055] The second wiring 22 has a second trunk line 221 and a second branch line 222. The second trunk line 221 extends along the first direction X, and at least one end thereof is electrically connected to the adjacent first trunk line 211. The second branch line 222 extends along the second direction Y, and one end thereof is electrically connected to the second trunk line 221, and the other end thereof is electrically connected to the corresponding second driving unit 112 in the substrate 10.

[0056] The third wiring 31 has a third trunk line 311 and a third branch line 312. The third trunk line 311 extends along the first direction X, and at least one end thereof is electrically connected to the fourth wiring 32. The third branch line 312 extends along the second direction Y, and one end thereof is electrically connected to the third trunk line 311, and the other end thereof is electrically connected to the corresponding third driving unit 113 in the substrate 10.

[0057] The fourth wiring 32 has a fourth trunk line 321 and a fourth branch line 322. The fourth trunk line 321 extends along the first direction X, and at least one end thereof is electrically connected to the adjacent third trunk line 311. The fourth branch line 322 extends along the second direction Y, and one end thereof is electrically connected to the fourth trunk line 321, and the other end thereof is electrically connected to the corresponding fourth driving unit 114 in the substrate 10.

[0058] Specifically, the orthographic projections of the first main line 211, the second main line 221, the third main line 311 and the fourth main line 321 on the substrate 10 are located between two adjacent columns of driving units 11, and the orthographic projection of the first main line 211 on the substrate 10 overlaps with the orthographic projection of the third main line 311 on the substrate 10, and the orthographic projection of the second main line 221 on the substrate 10 overlaps with the orthographic projection of the fourth main line 321 on the substrate 10. By arranging the main line portion of the first signal line 2 to overlap with the main line portion of the second signal line 3, the wiring space of the signal line in the vertical direction (i.e., the stacking direction) of the display panel 1 is reused, thereby reducing the area occupied by the signal line in the horizontal direction of the display panel 1, thereby increasing the arrangement area of ​​the driving unit 11 in the horizontal direction of the display panel 1, and improving the PPI of the display panel 1.

[0059] Furthermore, the orthographic projection of the first branch line 212 on the substrate 10 and the orthographic projection of the third branch line 312 on the substrate 10 are axially symmetrical with the first main line 211 or the third main line 311 as the symmetry axis and do not overlap each other, and the orthographic projection of the second branch line 222 on the substrate 10 and the orthographic projection of the fourth branch line 322 on the substrate 10 are axially symmetrical with the second main line 221 or the fourth main line 321 as the symmetry axis and do not overlap each other, thereby causing the driving unit 11 electrically connected to the first signal line 2 and the driving unit 11 electrically connected to the second signal line 3 to be arranged crosswise, so that two adjacent driving units 11 in the same column can be electrically connected to signal wirings located in different metal layers, thereby eliminating the phenomenon that the RC loads of the driving units 11 in two adjacent columns are different, and preventing the display panel 1 from generating column-wise mura.

[0060] In related display technologies, a signal line is usually electrically connected to a driving unit located in the same column, so the data signal decoded and output by a commonly used driving chip to the same signal line is usually the value required to drive the driving unit in the same column, but in the embodiment of the present invention, the driving units 11 electrically connected to the same signal line are not located in the same column, so the conventional driving chip cannot meet the decoding requirements of the display panel 1 in the embodiment of the present invention. Based on the above requirements, the driving chip 4 used in the embodiment of the present invention can output the decoded data signal alternately between the first signal line 2 and the second signal line 3, or can directly decode the cross-arranged data signal to adapt to the first signal line 2 and the second signal line 3 cross-connected with the driving units 11 in two adjacent columns in the embodiment of the present invention.

[0061] like Figure 2 and Figure 3 As shown in , the display panel 1 is further provided with a plurality of connection holes 12 and a plurality of organic holes 50. A connection hole 12 is provided on one side of each driving unit 11, and the first wiring 21, the second wiring 22, the third wiring 31 and the fourth wiring 32 are electrically connected to the corresponding driving unit 11 through the connection hole 12. The organic hole 50 is located on the side of the driving unit 11 away from the connection hole 12, and the light-emitting device in the display panel 1 is electrically connected to the pixel circuit in the driving unit 11 through the organic hole 50.

[0062] The embodiment of the present invention further provides a display device, which may be an AMOLED display device, comprising the display panel 1 as described above. The display device may be any display device with a display function, such as a mobile phone, a notebook computer, a tablet computer, and the like.

[0063] In the embodiment of the present invention, the signal wiring of the display panel is stacked to reduce the wiring area occupied by the signal wiring, increase the arrangement area of ​​the driving unit, and thus increase the pixel density of the display panel. At the same time, the same signal line in the embodiment of the present invention is alternately connected to the driving units in two adjacent columns, so that two adjacent driving units in the same column are electrically connected to the signal lines in different metal layers, so that the RC loads of the driving units in the two adjacent columns are the same, thereby solving the problem of column-wise display unevenness (mura) of the display panel.

[0064] Example 2

[0065] Based on the technical problems existing in the related display technologies, an embodiment of the present invention provides a display panel 1, such as Figure 5 , Figure 6 and Figure 7 As shown in , the display panel 1 comprises a substrate 10 , a first metal layer 20 and a second metal layer 30 .

[0066] The substrate 10 is an array substrate, which includes a plurality of drive units 11 arranged in an array along a first direction X and a second direction Y perpendicular to each other, each drive unit 11 includes a plurality of TFT (Thin Film Transistor) devices, and a plurality of TFT devices are connected to form a pixel circuit, which can be one of other types of pixel circuits such as 7T1C (7 TFT devices and 1 capacitor), 5T2C (5 TFT devices and 2 capacitors), 3T2C (3 TFT devices and 2 capacitors), 2T1C (2 TFT devices and 1 capacitor). The pixel circuit drives the light-emitting device connected to the pixel circuit to light up or turn off according to the received display signal, thereby realizing the display and switching of the picture.

[0067] The first metal layer 20 and the second metal layer 30 are stacked on the substrate 10. The first metal layer 20 and the second metal layer 30 each include a plurality of signal traces, which are electrically connected to the corresponding driving unit 11 and transmit corresponding display signals to the pixel circuit in the driving unit 11. The first metal layer 20 is insulated and arranged on one side of the substrate 10, and the second metal layer 30 is insulated and arranged on the side of the first metal layer 20 away from the substrate 10. The driving unit 11 includes a first driving unit 111 with coordinates of odd rows and odd columns, a second driving unit 112 with coordinates of even rows and even columns, a third driving unit 113 with coordinates of odd rows and even columns, and a fourth driving unit 114 with coordinates of even rows and odd columns.

[0068] like Figure 6 and Fig. 9As shown in , the first metal layer 20 includes a plurality of first wirings 21 and a plurality of second wirings 22, and the first wirings 21 and the second wirings 22 are arranged alternately, that is, the first wirings 21 and the second wirings 22 are in the same layer and are provided with the same material. Among them, the first wirings 21 are electrically connected to the first driving units 111 whose coordinates are odd rows and odd columns, and the second wirings 22 are electrically connected to the second driving units 112 whose coordinates are even rows and even columns.

[0069] The second metal layer 30 includes a plurality of third routing lines 31 and a plurality of fourth routing lines 32, and the third routing lines 31 and the fourth routing lines 32 are arranged alternately, that is, the third routing lines 31 and the fourth routing lines 32 are arranged in the same layer and with the same material. Among them, the third routing lines 31 are electrically connected to the third driving units 113 whose coordinates are odd rows and even columns, and the fourth routing lines 32 are electrically connected to the fourth driving units 114 whose coordinates are even rows and odd columns.

[0070] The first wiring 21 is electrically connected to the fourth wiring 32 and is combined to form the first signal line 2. The second wiring 22 is electrically connected to the third wiring 31 and is combined to form the second signal line 3. The first signal line 2 and the second signal line 3 are both used as data signal lines for transmitting data signals. One end thereof away from the driving unit 11 is electrically connected to the driving chip 4 located in the non-display area of ​​the display panel 1. The orthographic projection of the first wiring 21 on the substrate 10 at least partially overlaps with the orthographic projection of the third wiring 31 on the substrate 10, and the orthographic projection of the second wiring 22 on the substrate 10 at least partially overlaps with the orthographic projection of the fourth wiring 32 on the substrate 10. At least part of the orthographic projections of the first wiring 21, the second wiring 22, the third wiring 31 and the fourth wiring 32 on the substrate 10 are located between two adjacent columns of driving units 11.

[0071] The first wiring 21 has a first trunk line 211 and a first branch line 212. The first trunk line 211 extends along the first direction X, and at least one end thereof is electrically connected to the adjacent fourth wiring 32. The first branch line 212 extends along a second direction Y perpendicular to the first direction X, and one end thereof is electrically connected to the first trunk line 211, and the other end thereof is electrically connected to the corresponding first driving unit 111 in the substrate 10.

[0072] The second wiring 22 has a second trunk line 221 and a second branch line 222. The second trunk line 221 extends along the first direction X, and at least one end thereof is electrically connected to the adjacent third wiring 31. The second branch line 222 extends along the second direction Y, and one end thereof is electrically connected to the second trunk line 221, and the other end thereof is electrically connected to the corresponding second driving unit 112 in the substrate 10.

[0073] The third wiring 31 has a third trunk line 311 and a third branch line 312. The third trunk line 311 extends along the first direction X, and at least one end thereof is electrically connected to the adjacent second wiring 22. The third branch line 312 extends along the second direction Y, and one end thereof is electrically connected to the third trunk line 311, and the other end thereof is electrically connected to the corresponding third driving unit 113 in the substrate 10.

[0074] The fourth line 32 has a fourth trunk line 321 and a fourth branch line 322. The fourth trunk line 321 extends along the first direction X. At least one end thereof is electrically connected to the adjacent first line 21. The fourth branch line 322 extends along the second direction Y, one end of which is electrically connected to the fourth trunk line 321, and the other end of which is electrically connected to the corresponding fourth driving unit 114 in the substrate 10.

[0075] Specifically, the orthographic projections of the first main line 211, the second main line 221, the third main line 311 and the fourth main line 321 on the substrate 10 are located between two adjacent columns of driving units 11, and the orthographic projection of the first main line 211 on the substrate 10 overlaps with the orthographic projection of the third main line 311 on the substrate 10, and the orthographic projection of the second main line 221 on the substrate 10 overlaps with the orthographic projection of the fourth main line 321 on the substrate 10. By arranging the main line portion of the first signal line 2 to overlap with the main line portion of the second signal line 3, the wiring space of the signal line in the vertical direction (i.e., the stacking direction) of the display panel 1 is reused, thereby reducing the area occupied by the signal line in the horizontal direction of the display panel 1, thereby increasing the arrangement area of ​​the driving unit 11 in the horizontal direction of the display panel 1, and improving the PPI of the display panel 1. Furthermore, the orthographic projection of the first branch line 212 on the substrate 10 and the orthographic projection of the third branch line 312 on the substrate 10 are axially symmetrical with the first main line 211 or the third main line 311 as the axis of symmetry and do not overlap with each other, and the orthographic projection of the second branch line 222 on the substrate 10 and the orthographic projection of the fourth branch line 322 on the substrate 10 are axially symmetrical with the second main line 221 or the fourth main line 321 as the axis of symmetry and do not overlap with each other, thereby causing the driving unit 11 electrically connected to the signal wiring located in the first metal layer 20 and the driving unit 11 electrically connected to the signal wiring located in the second metal layer 30 to be arranged crosswise with each other.

[0076] In the embodiment of the present invention, the first wiring 21 and the second wiring 22 located in the first metal layer 20 are electrically connected to the third wiring 31 and the fourth wiring 32 located in the second metal layer 30, respectively, so that the positions of the first signal line 2 electrically connected to the odd-numbered column driving unit 11 and the second signal line 3 electrically connected to the even-numbered column driving unit 11 in the stacking direction of the display panel 1 are no longer fixed in a certain metal layer, but alternately pass between the first metal layer 20 and the second metal layer 30, so that the driving units 11 in the same column can be electrically connected to the signal wirings located in different metal layers, thereby eliminating the phenomenon that the RC loads of the driving units 11 in two adjacent columns are different, and preventing the display panel 1 from generating column-wise mura.

[0077] At the same time, the signal line in the embodiment of the present invention can be electrically connected to the driving unit 11 located in the same column, so that the data signal decoded and output by the conventional driving chip can be transmitted without the need for special decoding. Compared with the display panel provided in Example 1 of the present invention, the signal decoding difficulty of the display panel 1 in the embodiment of the present invention is lower, and the requirements for the decoding performance of the driving chip 4 are also lower, thereby reducing the cost of the driving chip 4.

[0078] like Figure 6 , Figure 8 and Fig. 9 As shown in , specifically, the display panel 1 further includes an insulating layer 40, which is disposed between the first metal layer 20 and the second metal layer 30 and is used to insulate and isolate the signal lines in the first metal layer 20 and the second metal layer 30. A plurality of first vias 41 and a plurality of second vias 42 are provided in the insulating layer 40, and the first line 21 and the fourth line 32 are electrically connected through the first vias 41, and the second line 22 and the third line 31 are electrically connected through the second vias 42. The first vias 41 and the second vias 42 are respectively located on both sides of the first signal line and the second signal line 3, that is, the first vias 41 and the second vias 42 are respectively located on both sides of the first trunk line 211, the second trunk line 221, the third trunk line 311 and the fourth trunk line 321, and the line widths of the first trunk line 211, the second trunk line 221, the third trunk line 311 and the fourth trunk line 321 are all smaller than the spacing between the first vias 41 and the adjacent second vias 42.

[0079] Specifically, the first metal layer 20 further includes a plurality of first connection lines 23 and a plurality of second connection lines 24 , and the second metal layer 30 further includes a plurality of third connection lines 33 and a plurality of fourth connection lines 34 .

[0080] A first connection line 23 and a fourth connection line 34 are provided between the adjacent first routing line 21 and fourth routing line 32, the first connection line 23 intersects with the first trunk line 211, and the fourth connection line 34 intersects with the fourth trunk line 321. The orthographic projections of the first connection line 23 and the fourth connection line 34 on the insulating layer 40 have a first overlapping region 43, and at least one first via hole 41 is provided in the first overlapping region 43. The first connection line 23 and the fourth connection line 34 are electrically connected by filling the first via hole 41 located in the first overlapping region 43, thereby achieving electrical connection between the first routing line 21 and the fourth routing line 32.

[0081] A second connecting line 24 and a third connecting line 33 are provided between the adjacent second routing lines 22 and third routing lines 33, the second connecting line 24 intersects with the second main line 221, and the third connecting line 33 intersects with the third main line 311. The orthographic projections of the second connecting line 24 and the third connecting line 33 on the insulating layer 40 have a second overlapping area 44, and at least one second via hole 42 is provided in the second overlapping area 44. The second connecting line 24 and the third connecting line 33 are electrically connected by filling the second via hole 42 located in the second overlapping area 44, thereby achieving electrical connection between the second routing line 22 and the third routing line 31.

[0082] like Figure 6 and Figure 7 As shown in , the display panel 1 is further provided with a plurality of connection holes 12 and a plurality of organic holes 50. A connection hole 12 is provided on one side of each driving unit 11, and the first wiring 21, the second wiring 22, the third wiring 31 and the fourth wiring 32 are electrically connected to the corresponding driving unit 11 through the connection hole 12. The organic hole 50 is located on the side of the driving unit 11 away from the connection hole 12, and the light-emitting device in the display panel 1 is electrically connected to the pixel circuit in the driving unit 11 through the organic hole 50.

[0083] In the embodiment of the present invention, the signal wiring of the display panel is stacked to reduce the wiring area occupied by the signal wiring, increase the arrangement area of ​​the drive unit, and thus increase the pixel density of the display panel. At the same time, the same signal line in the embodiment of the present invention alternately runs through the two metal layers, so that the drive units in the same column can be electrically connected to different metal layers, so that the RC loads of the drive units in two adjacent columns are the same, thereby solving the problem of column-wise display unevenness (mura) of the display panel.

[0084] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A display panel, characterized in that: include: A substrate comprising a plurality of drive units arranged in an array; A first metal layer, disposed on the substrate, comprising a plurality of first wirings and a plurality of second wirings, wherein the first wirings are electrically connected to the first driving units whose coordinates are odd rows and odd columns, and the second wirings are electrically connected to the second driving units whose coordinates are even rows and even columns; a second metal layer, disposed on a side of the first metal layer away from the substrate, comprising a plurality of third wirings and a plurality of fourth wirings, wherein the third wirings are electrically connected to the third driving units whose coordinates are odd rows and even columns, and the fourth wirings are electrically connected to the fourth driving units whose coordinates are even rows and odd columns; The orthographic projection of the first routing line on the substrate at least partially overlaps with the orthographic projection of the third routing line on the substrate; The orthographic projection of the second routing line on the substrate at least partially overlaps with the orthographic projection of the fourth routing line on the substrate.

2. The display panel according to claim 1, wherein: At least part of the orthographic projections of the first routing line, the second routing line, the third routing line, and the fourth routing line on the substrate are located between two adjacent columns of the driving units.

3. The display panel according to claim 1, wherein: The first routing includes: a first trunk line extending along a first direction; a first branch line extending along a second direction perpendicular to the first direction and electrically connected to the first main line and the first driving unit; The third routing includes: a third trunk line extending along the first direction; a third branch line extending along the second direction and electrically connected to the third main line and the third driving unit; preferably, the orthographic projection of the first main line on the substrate overlaps with the orthographic projection of the third main line on the substrate; Preferably, the orthographic projection of the first branch line on the substrate and the orthographic projection of the third branch line on the substrate are symmetrical to each other and do not overlap each other.

4. The display panel according to claim 1, wherein: The second routing includes: a second main line extending along the first direction; a second branch line extending along a second direction perpendicular to the first direction and electrically connected to the second main line and the second driving unit; The fourth routing includes: a fourth trunk line extending along the first direction; a fourth branch line extending along the second direction and electrically connected to the fourth main line and the fourth driving unit; preferably, the orthographic projection of the second main line on the substrate overlaps with the orthographic projection of the fourth main line on the substrate; Preferably, the orthographic projection of the second branch line on the substrate and the orthographic projection of the fourth branch line on the substrate are symmetrical to each other and do not overlap each other.

5. The display panel according to claim 1, wherein: The first wiring is electrically connected to the second wiring and is provided in the same layer and with the same material; The third routing line is electrically connected to the fourth routing line and is provided in the same layer and with the same material.

6. The display panel according to claim 1, wherein: An insulating layer is provided between the first metal layer and the second metal layer, and a plurality of first via holes and a plurality of second via holes are provided in the insulating layer; The first wiring is electrically connected to the fourth wiring through the first via; The second wiring is electrically connected to the third wiring through the second via; Preferably, the line widths of the first routing line, the second routing line, the third routing line and the fourth routing line are all smaller than the spacing between the first via hole and the adjacent second via hole.

7. The display panel according to claim 6, wherein: A first connecting line and a fourth connecting line are provided between the adjacent first routing line and the fourth routing line, the first connecting line intersects with the first routing line, and the fourth connecting line intersects with the fourth routing line; The orthographic projections of the first connecting line and the fourth connecting line on the insulating layer have a first overlapping area, at least one first via hole is provided in the first overlapping area, and the first routing line and the fourth routing line are electrically connected in the first via hole.

8. The display panel according to claim 6, wherein: A second connecting line and a third connecting line are provided between the adjacent second routing lines and the third routing lines, the second connecting line intersects with the second routing lines, and the third connecting line intersects with the third routing lines; The orthographic projections of the second connecting line and the third connecting line on the insulating layer have a first overlapping area, at least one second via hole is provided in the first overlapping area, and the second routing line is electrically connected to the third routing line in the second via hole.

9. The display panel according to claim 1, wherein: Also includes: A plurality of connection holes, one side of each of the driving units is provided with one of the connection holes, and the first wiring, the second wiring, the third wiring and the fourth wiring are electrically connected to the corresponding driving unit through the connection holes.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-9.

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