Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes: a display area and a non-display area that at least partially surrounds the display area. The display area includes a first data line and an auxiliary signal line extending in the column direction. At least part of the first data line is electrically connected to the auxiliary signal line via a plurality of connecting portions extending in the row direction, and the row direction and the column direction intersect. The non-display area includes a binding area, and the binding area includes a binding pad. The display area includes a first area and a second area arranged in the column direction, and the second area is located on a side of the first area away from the binding area. One end of the auxiliary signal line is electrically connected to the binding pad, and the other end of the auxiliary signal line extends to the second area. The present invention can improve the unevenness of the upper and lower areas of the display panel when the screen is off, and can also improve the uniformity of color brightness in the edge area and the middle area when the image is displayed.

Description

Technical Field

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

[0002] Currently, display technology has permeated every aspect of our daily lives, and accordingly, an increasing number of materials and technologies are being used in display screens. Display panels, as an important component of display devices, are used to implement the display functions of display devices. Currently, the mainstream display screens include liquid crystal display panels and organic light-emitting diode (OLED) panels.

[0003] Organic light-emitting diodes (OLEDs), as current-type light-emitting devices, are increasingly being used in high-performance displays. OLED display panels boast numerous excellent properties, including self-luminescence, wide viewing angles, fast response times, high contrast, a wide color gamut, low energy consumption, thin panels, rich colors, flexible displays, and a wide operating temperature range. They are therefore being hailed as the next generation of "star" flat-panel display technology. OLED display panels include an anode and a cathode, as well as a hole transport layer, an organic light-emitting layer, and an electron transport layer disposed between the anode and cathode. The anode provides hole injection, while the cathode provides electron injection. Driven by an external voltage, the holes and electrons injected by the cathode and anode recombine in the organic light-emitting layer, forming electron-hole pairs (i.e., excitons) at bound energy levels. The excitons then radiate and excite photons, generating visible light.

[0004] However, the OLED display panel of the related art has uneven display on the upper and lower parts when the screen is off, and there is a problem of color brightness difference between the left and right edges and the middle area when displaying the picture.

[0005] Therefore, there is an urgent need to provide a display panel and a display device that can improve the uneven display of the upper and lower parts of the OLED display panel when the screen is off, and the color and brightness differences between the left and right edges and the middle area when displaying the picture. Summary of the Invention

[0006] In view of this, the present invention provides a display panel and a display device for improving the problem of uneven display at the upper and lower parts of the display panel when the screen is off, and color brightness differences between the left and right edges and the middle area when displaying the picture.

[0007] In one aspect, the present invention provides a display panel, comprising: a display area and a non-display area at least partially surrounding the display area, the display area comprising first data lines and auxiliary signal lines extending in a column direction, at least some of the first data lines being electrically connected to the auxiliary signal lines via a plurality of connecting portions extending in a row direction, the row direction intersecting the column direction;

[0008] The non-display area includes a binding area, the binding area includes a binding pad, the display area includes a first area and a second area arranged along the column direction, and the second area is located on a side of the first area away from the binding area; one end of the auxiliary signal line is electrically connected to the binding pad, and the other end of the auxiliary signal line extends to the second area.

[0009] On the other hand, the present invention further provides a display device comprising the above-mentioned display panel.

[0010] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0011] The display panel of the present invention includes first data lines and auxiliary signal lines extending along the column direction, part of the first data lines is only located in the display area, at least part of the first data lines are electrically connected to the auxiliary signal lines through multiple connecting parts extending along the row direction, the auxiliary data lines are electrically connected to the binding pads, and the data signals are transmitted to the first data lines through the auxiliary signal lines and the connecting parts. On the one hand, in the related art, all the first data lines are directly connected to the binding pads, while the first data lines located at the edges on both sides of the row direction need to be wound when connected to the binding pads, which will make the area of ​​the lower frame larger and cannot achieve a narrow frame. In the present invention, the first data lines at the edges on both sides of the row direction are only located in the display area and are electrically connected to the binding pads through the auxiliary signal lines located in the middle area. In this way, no winding is required in the lower frame, which is conducive to achieving a narrow frame. On the other hand, in order to reduce winding, the related art will adopt a fan-out routing method to electrically connect the first data line to the binding pad, but the fan-out routing is only set in the lower area of ​​the display panel close to the binding pad. Since the fan-out routing is usually a metal routing, it causes a difference in reflectivity of the signal lines in the lower and upper areas of the display panel, which causes uneven screen images in the lower and upper areas of the display panel when the display panel is in the screen-off state. In the present invention, the first data line is connected through an auxiliary signal line, and the auxiliary signal line extends to the second area along the column direction, that is, It extends to the upper area of ​​the display panel, so that the signal lines in the first area and the second area are uniform, eliminating the reflectivity difference caused by the signal lines, and improving the problem of uneven pictures in the first area and the second area in the screen-off state; in addition, in order to reduce winding, the related art will adopt a fan-out routing method to electrically connect the first data line to the binding pad. In this way, the first data lines on the edges of the two sides in the row direction have fan-out routing, so their lengths are greater than the length of the first data line in the middle area. Due to the different lengths, the resistances are also different. Therefore, when displaying, the color brightness of the edges of the two sides in the row direction is smaller than the color brightness of the middle area. In the present invention, since it is connected to the first data line through an auxiliary signal line, and the auxiliary signal line and the first data line are connected in parallel through the connecting part, the parallel connection is equivalent to reducing the resistance of the first data lines on the edges of the two sides, so that the resistance of the first data lines in the edges of the two sides is basically consistent with the resistance of the first data lines in the middle area, thereby improving the uniformity of the color brightness of the edge area and the middle area when displaying the picture.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0013] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0015] Figure 1 is a schematic diagram of a planar structure of a display panel in the related art;

[0016] Figure 2 This is a schematic diagram of the planar structure of a display panel provided by the present invention;

[0017] Figure 3 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0018] Figure 4 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0019] Figure 5 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0020] Figure 6 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0021] Figure 7 yes Figure 2 A cross-section taken along the A-A' direction;

[0022] Figure 8 yes Figure 2 Another cross-sectional view in the A-A' direction;

[0023] Figure 9 yes Figure 2 Another cross-sectional view in the A-A' direction;

[0024] Figure 10 yes Figure 3 A cross-section taken along the B-B' direction;

[0025] Figure 11 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0026] Figure 12 is a schematic diagram of a planar structure of another display panel provided by the present invention;

[0027] Figure 13 It is a schematic diagram of the planar structure of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] In view of the fact that the display panel in the related art has uneven display on the upper and lower parts when the screen is off, and there is a color brightness difference between the left and right edges and the middle area when the picture is displayed, the inventors conducted the following research on the related art, referring to Figure 1 , Figure 1 It is a schematic diagram of the planar structure of a display panel in the related art. In the related art, the display panel 000 has a display area AA' and a non-display area BB' surrounding the display area AA'. BB' includes a lower frame BB1' and an upper frame BB2', a middle area AA1' in the row direction X, and edge areas AA2' on both sides of the middle area AA1'. The first data line D1' is located in the edge area AA2', and the second data line D2' is located in the middle area AA1'. Both the first data line D1' and the second data line D2' need to be electrically connected to the binding pad of the binding area BD'. The length of the binding area BD' in the row direction X is certain. Usually, the length of the binding area BD' in the row direction X is smaller than the length of the display area AA' in the row direction X. The second data line D2' can be directly connected to the binding pad of the binding area BD', while the first data line D2' cannot be directly connected to the binding pad of the binding area BD and needs to be wound. However, the winding takes up a certain space, resulting in the inability to compress the lower frame BB1' in the column direction Y. Therefore Figure 1The fan-out trace SC1' is used to electrically connect the first data line D1' located in the edge area AA2' to the binding pad, but these fan-out traces SC1' are only located in the first area Q1' close to the lower frame BB1', while there are no fan-out traces in the second area Q2' close to the upper frame BB2'. When the display panel is in the screen-off state, a difference in reflectivity of the fan-out traces will be formed in the first area Q1' and the second area Q2', resulting in unevenness in the top and bottom of the screen-off image. In addition, the sum of the lengths of the first data line D1' and the fan-out trace SC1' in the edge area AA2' is greater than the length of the second data line D2' in the middle area AA1', so the load of the first data line D1' and the fan-out trace SC1' is also greater than the load of the second data line D2'. Therefore, when displaying the image, the color brightness of the edge area AA2' is different from that of the middle area AA1'. To be precise, the color brightness of the edge area AA2' is lower than that of the middle area AA1'.

[0034] In view of this, the present invention provides a display panel and a display device for improving the problem of uneven display at the upper and lower parts of the display panel when the screen is off, and the problem of color brightness difference between the left and right edges and the middle area when displaying the picture. The specific embodiments of the display panel and the display device will be described in detail below.

[0035] Reference Figure 2 , Figure 2 : This is a schematic diagram of the planar structure of a display panel provided by the present invention. The display panel 100 provided in this embodiment includes: a display area AA and a non-display area BB that at least partially surrounds the display area AA. The display area AA includes a first data line 111 and an auxiliary signal line 211 extending along the column direction Y. At least part of the first data line 111 is electrically connected to the auxiliary signal line 211 through a plurality of connecting portions 311 extending along the row direction X. The row direction X and the column direction Y intersect. The non-display area BB includes a binding area BD, and the binding area BD includes a binding pad 411. The display area AA includes a first area Q1 and a second area Q2 arranged along the column direction Y. The second area Q2 is located on a side of the first area Q1 away from the binding area BD. One end of the auxiliary signal line 211 is electrically connected to the binding pad 411, and the other end of the auxiliary signal line 211 extends to the second area Q2.

[0036] Specifically, the display panel 100 in the present invention may be an organic self-luminous display panel 100. Figure 2 The figure only schematically shows the situation where the non-display area BB completely surrounds the display area AA. Of course, the non-display area BB can also partially surround the display area AA, such as a water drop screen, etc., which is not specifically limited here.

[0037] It is understandable that the display area AA further includes a plurality of pixels arranged in an array, which are not shown in the figure. Figure 2The number of the first data lines 111 and the auxiliary signal lines 211 is only for schematic illustration. The number of the first data lines 111 connected to the auxiliary signal lines 211 is not specifically limited here. Of course, the number of the connecting parts 311 connecting the first data lines 111 and the auxiliary signal lines 211 is 2, which is only for schematic illustration. Figure 2 The figure schematically shows that the connection portions 311 connecting the first data line 111 and the auxiliary signal line 211 are located in the first zone Q1 and the second zone Q2, respectively. Of course, the connection portions 311 can also be located in the first zone Q1 or the second zone Q2. The more connection portions 311 there are, the closer the resistance of the first data line 111 and the auxiliary signal line 211 connected in parallel is to the resistance of the first data line 111.

[0038] Optionally, the non-display area BB includes a lower frame BB1 ​​and an upper frame BB2 that are relatively arranged along the column direction Y. The lower frame BB1 ​​includes a binding area BD. The binding area BD is provided with a plurality of binding pads 411 arranged along the row direction X. The base substrate of the display panel 100 is bent to the back of the display panel 100 at the position of the lower frame BB1. The display panel 100 also includes a driver chip IC. The driver chip IC is used to provide a voltage signal. The driver chip IC is bound to the base substrate 91.

[0039] Optionally, the display area AA along the row direction X includes a middle display area AA1 and edge display areas AA2 located on both sides of the middle display area AA1. In this embodiment, the display area AA includes a first data line 111 and an auxiliary signal line 211 extending along the column direction Y. The first data line 111 located in the edge display area AA2 is electrically connected to the auxiliary signal line 211 through multiple connecting parts 311 extending along the row direction X; along the column direction Y, the display area AA includes a first area Q1 and a second area Q2, the second area Q2 is located on the side of the first area Q1 away from the binding area BD, the first area Q1 is closer to the binding area BD, and the second area Q2 is closer to the upper frame BB2, one end of the auxiliary signal line 211 is electrically connected to the binding pad 411, and the other end of the auxiliary signal line 211 extends to the second area Q2.

[0040] It can be understood that at least a portion of the first data lines 111 are electrically connected to the auxiliary signal lines 211 via a plurality of connecting portions 311 extending along the row direction X. Here, at least a portion of the first data lines 111 refers to the first data lines 111 located in the edge display area AA2. The first data lines 111 located in the middle display area AA1 can be directly electrically connected to the bonding pads 411, so there is no need to provide auxiliary signal lines 211.

[0041] As described above, in the related art, all first data lines 111 need to be electrically connected to the binding pads 411. However, the first data lines 111 located in the edge display area AA2 need to be wound when connected to the binding pads 411, which will make the area of ​​the lower frame BB1 ​​larger and prevent the realization of a narrow frame. In the present invention, the first data lines 111 in the edge display area AA2 are only located in the display area AA and do not need to be wound. Instead, they are electrically connected to the binding pads 411 via the auxiliary signal lines 211 located in the middle display area AA1. This eliminates the need for winding in the lower frame BB1, which is conducive to achieving a narrow frame.

[0042] On the other hand, refer to Figure 1 In order to reduce the wiring of the lower frame BB1 ​​and realize a narrow frame, the related art uses a fan-out routing method to electrically connect the first data line 111 in the edge display area AA2 to the binding pad 411. However, the fan-out routing is only provided in the first area Q1 of the display panel 100 close to the binding pad 411. Since the fan-out routing is usually a metal routing, it causes a difference in reflectivity of the signal lines in the first area Q1 and the second area Q2 of the display panel 100. When the display panel 100 is in the screen-off state, the screen-off images in the first area Q1 and the second area Q2 of the display panel 100 are uneven. The screen-off here means that the display panel 100 does not display and does not emit light. In the present invention, the first data line 111 is connected via an auxiliary signal line 211, and the auxiliary signal line 211 extends along the column direction Y to the second area Q2, that is, to the upper area of ​​the display panel 100 near the upper frame BB2. In this way, the auxiliary signal line 211 is respectively in the first area Q1 and the second area Q2. The auxiliary signal lines 211 in the first area Q1 and the second area Q2 are uniform, eliminating the reflectivity difference caused by the presence of the auxiliary signal line 211 in the first area Q1 and the absence of the auxiliary signal line 211 in the second area Q2, thereby improving the problem of uneven images in the first area Q1 and the second area Q2 in the screen-off state.

[0043] Furthermore, in order to reduce wiring, related art uses a fan-out routing method to electrically connect the first data line 111 to the binding pad 411. Thus, because the first data line 111 in the edge display area AA2 is connected to the fan-out routing, its length is greater than the length of the first data line 111 in the middle area. Due to the difference in length, the resistance is also different. Therefore, when displaying, the color brightness of the edge display area AA2 is less than the color brightness of the middle display area AA1. In the present invention, the first data line 111 in the edge display area AA2 is connected to the auxiliary signal line 211 via the connection portion 311. That is, the auxiliary signal line 211 and the first data line 111 are connected in parallel via the connection portion 311. The parallel connection reduces the resistance of the first data line 111 in the edge display area AA2, making the resistance of the first data line 111 in the edge display area AA2 substantially consistent with the resistance of the first data line 111 in the middle display area AA1. During display, the color brightness uniformity of the edge area and the middle area is improved.

[0044] In some optional embodiments, referring to Figure 3 , Figure 3 This is a schematic diagram of the planar structure of another display panel provided by the present invention. The connection portion 311 connected to the same auxiliary signal line 211 includes at least one first sub-connection portion 311a and a second sub-connection portion 311b. The first sub-connection portion 311a is located in the first zone Q1, and the second sub-connection portion 311b is located in the second zone Q2. The arrangement density of the first sub-connection portion 311a is equal to the arrangement density of the second sub-connection portion 311b.

[0045] Specifically, Figure 3In the direction from the edge display area AA2 to the middle display area AA1, the first data line 111 in the edge display area AA2 is sequentially the first data line 111a, the first data line 111b, the first data line 111c and the first data line 111d, and the auxiliary signal line 211a, the auxiliary signal line 211b, the auxiliary signal line 211c and the auxiliary signal line 211d are sequentially arranged in the middle display area AA1. The auxiliary signal line 211a and the first data line 111a pass through the first sub-connection portion 311a in the first area Q1 and the second sub-connection portion 311a in the second area Q2. In the embodiment, the auxiliary signal line 211a is connected to the first data line 111b via the first sub-connection portion 311a located in the first region Q1 and the second sub-connection portion 311b located in the second region Q2. The auxiliary signal line 211c is connected to the first data line 111c via the first sub-connection portion 311a located in the first region Q1 and the second sub-connection portion 311b located in the second region Q2. The auxiliary signal line 211d is connected to the first data line 111d via the first sub-connection portion 311a located in the first region Q1 and the second sub-connection portion 311b located in the second region Q2. The arrangement density of the first sub-connection portions 311a is equal to the arrangement density of the second sub-connection portions 311b. Figure 2 The figure schematically illustrates five first sub-connection portions 311a connected to the same auxiliary signal line 211 in the first region Q1, and five second sub-connection portions 311b connected to the same auxiliary signal line 211 in the second region Q2. This is for illustrative purposes only. The arrangement density of the five first sub-connection portions 311a is equal to the arrangement density of the five second sub-connection portions 311b, facilitating manufacturing.

[0046] This embodiment can achieve the effect of the display panel 100 in the previous embodiment, and the first sub-connection portion 311a is located in the first zone Q1, the second sub-connection portion 311b is located in the second zone Q2, the arrangement density of the first sub-connection portion 311a is equal to the arrangement density of the second sub-connection portion 311b, and multiple first sub-connection portions 311a and second sub-connection portions 311b with equal arrangement density are connected to the first data line 111 and the auxiliary signal line 211, which is convenient for manufacturing.

[0047] In some optional embodiments, continue to refer to Figure 3 A connection node 20 is provided at the connection position between the connection portion 311 and the auxiliary signal line 211 , and the distances between any two adjacent connection nodes 20 are equal.

[0048] Specifically, Figure 3In the direction from the edge display area AA2 to the middle display area AA1, the first data line 111 in the edge display area AA2 is sequentially the first data line 111a, the first data line 111b, the first data line 111c and the first data line 111d, and the auxiliary signal line 211a, the auxiliary signal line 211b, the auxiliary signal line 211c and the auxiliary signal line 211d are sequentially arranged in the middle display area AA1. The auxiliary signal line 211a and the first data line 111a are connected through a connecting portion 311. The connecting portion 311 and the auxiliary signal line 211 have a connecting node 201 at the connecting position. The distance between any two adjacent connecting nodes 201 is equal to L1; the auxiliary signal line 211b and the first data line 111d are sequentially arranged in the middle display area AA1. The data line 111b is connected through the connecting portion 311, and the connecting portion 311 has a connecting node 202 at the connecting position with the auxiliary signal line 211, and the distance between any two adjacent connecting nodes 202 is equal to L2; the auxiliary signal line 211c and the first data line 111c are connected through the connecting portion 311, and the connecting portion 311 has a connecting node 203 at the connecting position with the auxiliary signal line 211, and the distance between any two adjacent connecting nodes 203 is equal to L3; the auxiliary signal line 211d and the first data line 111d are connected through the connecting portion 311, and the connecting portion 311 has a connecting node 204 at the connecting position with the auxiliary signal line 211, and the distance between any two adjacent connecting nodes 204 is equal to L4. Figure 2 Schematically, the number of connection parts 311 connected to the same auxiliary signal line 211 is 10, which is only for schematic illustration. Preferably, L1 = L2 = L3 = L4, which is more convenient for manufacturing.

[0049] In this embodiment, a connection node 20 is provided at the connection position between the connection portion 311 and the auxiliary signal line 211 , and the distance between any two adjacent connection nodes 20 is equal, which facilitates manufacturing.

[0050] In some optional embodiments, referring to Figure 4 , Figure 4 is a schematic diagram of a planar structure of another display panel provided by the present invention. Figure 4 All the connection portions 311 connected to the same auxiliary signal line 211 are adjacent to each other along the column direction Y to form a connection portion group 30 , and the connection portion groups 30 corresponding to adjacent auxiliary signal lines 211 are staggered along the column direction Y.

[0051] Figure 4In the direction from the edge display area AA2 to the middle display area AA1, the first data line 111 in the edge display area AA2 is sequentially the first data line 111a, the first data line 111b, the first data line 111c and the first data line 111d, and the auxiliary signal line 211a, the auxiliary signal line 211b, the auxiliary signal line 211c and the auxiliary signal line 211d are sequentially arranged in the middle display area AA1. All the connection parts 311 connecting the auxiliary signal line 211a and the first data line 111a are adjacent to form a connection part group 30a. The figure schematically shows all the connection parts 311 connecting the auxiliary signal line 211a and the first data line 111a. 11 includes a connection portion 31101, a connection portion 31102, and a connection portion 31103. Of course, the number of connection portions 311 is not specifically limited here. Similarly, all the connection portions 311 connecting the auxiliary signal line 211b and the first data line 111b are adjacent to form a connection portion group 30b, all the connection portions 311 connecting the auxiliary signal line 211c and the first data line 111c are adjacent to form a connection portion group 30c, and all the connection portions 311 connecting the auxiliary signal line 211d and the first data line 111d are adjacent to form a connection portion group 30d. The connection portion group 30a, the connection portion group 30b, the connection portion group 30c, and the connection portion group 30d are alternately arranged along the column direction Y. Of course, the number of connection portions 311 in the connection portion group 30 is not specifically limited here.

[0052] In this embodiment, all the connection parts 311 connected to the same auxiliary signal line 211 are adjacent to each other in the column direction Y to form a connection part group 30. The connection part groups 30 corresponding to adjacent auxiliary signal lines 211 are staggered along the column direction Y. All the connection parts 311 connected to the same auxiliary signal line 211 can be set in adjacent positions, which is convenient for manufacturing.

[0053] In some optional embodiments, continue to refer to Figure 2 and Figure 3 The connection portions 311 connected to different auxiliary signal lines 211 are arranged alternately along the column direction Y.

[0054] Figure 2 and Figure 3In the embodiment, the connection parts 311 connected to different auxiliary signal lines 211 are staggered along the column direction Y, which can also realize the electrical connection between the auxiliary signal line 211 and the first data line 111, reduce the resistance of the first data line 111 in the edge display area AA2, and make the resistance of the first data line 111 in the edge display area AA2 basically consistent with the resistance of the first data line 111 in the middle display area AA1. When displaying, the uniformity of the color brightness of the edge display area AA2 and the middle display area AA1 when displaying the picture is improved; the auxiliary signal line 211 is connected to the first data line 111, and the auxiliary signal line 211 extends to the second area Q2 along the column direction Y. The auxiliary signal lines 211 in the first area Q1 and the second area Q2 are uniform, eliminating the reflectivity difference caused by the auxiliary signal line 211 in the first area Q1 and the absence of the auxiliary signal line 211 in the second area Q2, thereby improving the problem of uneven pictures in the first area Q1 and the second area Q2 in the screen-off state.

[0055] In some optional embodiments, referring to Figure 5 , Figure 5 3 is a schematic diagram of a planar structure of another display panel provided by the present invention, in which the lengths of the connection portions 311 connected to any auxiliary signal lines 211 in the row direction X are all equal.

[0056] It is understood that the connection portion 311 extends along the row direction X, the spacing between two adjacent first data lines 111 in the row direction X is equal, the spacing between two adjacent auxiliary signal lines 211 in the row direction X is equal, and the length of the connection portion 311 connecting the first data line 111 and the auxiliary signal line 211 in the row direction X is also equal, equal to c1, which facilitates manufacturing. Since the connection portion 311 is a metal wire and needs to be formed through patterning and etching, if the length of the connection portion 311 in the row direction X is equal, then there is no need to provide connection portions 311 of different lengths, which can simplify the manufacturing process.

[0057] In some optional embodiments, referring to Figure 6 , Figure 6 3 is a schematic diagram of a planar structure of another display panel provided by the present invention, in which the widths of the connection portions 311 connected to any auxiliary signal lines 211 in the column direction Y are all equal.

[0058] It is understandable that the connection portion 311 connected to the auxiliary signal line 211 also has resistance. The larger the cross-sectional area of ​​the auxiliary signal line 211, the smaller the resistance. Usually, pixels are arranged in an array, and the connection portion 311 extends along the row direction X. It needs to be set between adjacent pixels in the column direction Y to avoid reducing the aperture ratio of the pixels. Therefore, the width of the auxiliary signal line 211 in the column direction Y can be increased as much as possible without affecting the pixel aperture ratio, thereby reducing the resistance of the connection portion 311.

[0059] Since the connection portion 311 is a metal wire, it needs to be formed by patterning and etching. If the width of the connection portion 311 in the column direction Y is equal, there is no need to set the connection portions 311 with different widths, which can simplify the manufacturing process.

[0060] In this embodiment, the widths of the connection portions 311 connected to any auxiliary signal lines 211 in the column direction Y are all equal, which can simplify the manufacturing process.

[0061] In some optional embodiments, referring to Figures 7 to 9 , Figure 7 yes Figure 2 A cross-section view in the A-A' direction, Figure 8 yes Figure 2 Another cross-sectional view in the A-A' direction, Figure 9 yes Figure 2 In another cross-sectional view taken along the A-A' direction, the display panel further includes a base substrate 91; a first metal layer 202 located on one side of the base substrate 91; a second metal layer 204 located on the side of the first metal layer 202 away from the base substrate 91; a third metal layer 205 located on the side of the second metal layer 204 away from the base substrate 91; the first data line 111 and the auxiliary signal line 211 are both located in the second metal layer 204, and the connecting portion 311 is located in the first metal layer 202 and / or the connecting portion 311 is located in the third metal layer 205.

[0062] Figures 7 to 9 The display panel 100 includes: a base substrate 91, a buffer layer 92 located on one side of the base substrate 91, a semiconductor active layer 201 located on the buffer layer 92, a first metal layer 202 located on the side of the semiconductor active layer 201 away from the base substrate 91, a capacitor metal layer 203 located on the side of the first metal layer 202 away from the base substrate 91, a second metal layer 204 located on the side of the capacitor metal layer 203 away from the base substrate 91, and a third metal layer 205 located on the side of the second metal layer 204 away from the base substrate 91. The display panel 100 also includes a thin film transistor T and a light-emitting device 40 located on the side of the thin film transistor T away from the base substrate 91. The light-emitting device 40 includes an anode layer 410, a light-emitting layer 420 located on the side of the anode away from the base substrate 91, and a cathode 430 located on the side of the light-emitting layer 420 away from the base substrate 91. The thin film transistor T includes a gate and a source and drain electrode. The gate is located on the first metal layer 202, and the source and drain electrodes are located on the second metal layer 204. The third metal layer 205 is provided between the anode layer 410 and the source and drain electrodes. Optionally, the thin film transistor 20 is located on the buffer layer 92 . Figures 7 to 9The structure of the top-gate thin-film transistor is described here as an example. Only one thin-film transistor T is schematically shown. In actual products, each pixel has at least one thin-film transistor. For example, a pixel driver circuit of 7T1C has seven transistors and one storage capacitor. The thin-film transistor T here is merely a schematic illustration of the film layer of the display panel. The thin-film transistor T includes a semiconductor active layer 201 located on a buffer layer 92. The semiconductor active layer 201 includes a source region and a drain region formed by doping with N-type or P-type impurity ions. The region between the source and drain regions is an undoped channel region. The semiconductor active layer can be formed by crystallizing amorphous silicon to convert it into polycrystalline silicon. To crystallize amorphous silicon, the gate electrode can include a single layer or multiple layers of gold (Au), silver (Ag), copper (Cu), nickel (Ni), platinum (Pt), palladium (Pd), aluminum (Al), molybdenum (Mo), or chromium (Cr), or an alloy such as an aluminum (Al):neodymium (Nd) alloy or a molybdenum (Mo):tungsten (W) alloy. The source and drain electrodes are electrically connected (or bonded) to the source region and drain region of the semiconductor active layer 201 respectively through contact holes, and the contact holes are formed by selectively removing the insulating layer. Figures 7 to 9 Also shown is an encapsulation layer 50 located on the side of the light-emitting device 40 away from the base substrate 91. The encapsulation layer 50 may optionally include a laminated structure of an inorganic encapsulation layer, an organic encapsulation layer, and an inorganic encapsulation layer. The present invention is not limited to the specific structure of the encapsulation layer 50. The encapsulation layer 50 may include multiple inorganic encapsulation layers and multiple organic encapsulation layers, so as to provide good protection for the light-emitting device 40 in the display area AAAA. The thin film transistor T drives the light-emitting device 40 to emit light for display.

[0063] Figures 7 to 9 In the embodiment, the first data line 111 and the auxiliary signal line 211 are both located in the second metal layer 204. Figure 7 The middle connecting portion 311 is located in the third metal layer 205. Figure 8 The middle connecting portion 311 is located in the first metal layer 202. Figure 9 The middle connection portion 311 includes two parts, one part is located in the first metal layer 202, and the other part is located in the third metal layer 205, which is equivalent to the connection portion 311 itself being in parallel, which is beneficial to further reduce the resistance of the connection portion 311. In some optional embodiments, referring to Figures 7 to 9 The connecting portion 311 is electrically connected to the first data line 111 and the auxiliary signal line 211 through a via hole.

[0064] The first data lines 111 and the auxiliary signal lines 211 both extend in the column direction Y, while the connection portion 311 extends in the row direction X. Since other data lines exist between the interconnected first data lines 111 and the auxiliary signal lines 211, if the connection portion 311 were on the same layer as the first data lines 111 (and the auxiliary signal lines 211), a short circuit would inevitably occur. Therefore, the connection portion 311 needs to be on a different layer from the first data lines 111 and the auxiliary signal lines 211. Adding a new film layer would increase the thickness of the display panel. In this embodiment, the connection portion 311 is located in the first metal layer 202 and / or the third metal layer 205. Using the existing film layers in the display panel to provide the connection portion 311 does not increase the overall thickness of the display panel.

[0065] In some optional embodiments, continue to refer to Figure 3 Along the row direction X, the display area AA includes a middle display area AA1 and edge display areas AA2 located on both sides of the middle display area AA1. In the direction from the edge display area AA2 to the middle display area AA1, the edge display area AA2 includes the 1st to nth first data lines 111, and the middle display area AA1 includes the 1st to nth auxiliary signal lines 211, where n is a positive integer greater than 1. The first data lines 111 correspond to the auxiliary signal lines 211 one-to-one. The connection portion 311 connected to the i-th auxiliary signal line 211 is the first connection portion 3112, and the connection portion 311 connected to the i-1th auxiliary signal line 211 is the second connection portion 3113. i is a positive integer greater than or equal to 2 and less than or equal to n. In the direction perpendicular to the plane of the base substrate 91, the first connection portion 3112 and the second connection portion 3113 do not overlap.

[0066] Figure 3It is only schematically shown that the edge display area AA2 includes the 1st to 4th first data lines 111, and the middle display area AA1 includes the 1st to 4th auxiliary signal lines 211. In the direction from the edge display area AA2 to the middle display area AA1, the first data lines 111 in the edge display area AA2 are the first data line 111a, the first data line 111b, the first data line 111c and the first data line 111d in sequence, and the auxiliary signal lines 211a, the auxiliary signal line 211b, the auxiliary signal line 211c and the auxiliary signal line 211d are arranged in sequence in the middle display area AA1, and the first data lines 111 are electrically connected to the auxiliary signal lines 211 in a one-to-one correspondence. To illustrate, if the connection portion 311 connected to the second auxiliary signal line 211b is the first connection portion 3112, and the connection portion 311 connected to the third auxiliary signal line 211c is the second connection portion 3113, then the orthographic projection of the first connection portion 3112 on the plane of the substrate 91 and the orthographic projection of the second connection portion 3113 on the plane of the substrate 92 do not overlap. If the orthographic projection of the first connection portion 3112 on the plane of the substrate 91 and the orthographic projection of the second connection portion 3113 on the plane of the substrate 92 do overlap, crosstalk will occur between the first connection portion 3112 and the second connection portion 3113. In this embodiment, the first connection portion 3112 and the second connection portion 3113 do not overlap in a direction perpendicular to the plane of the substrate 91 to prevent crosstalk between the first connection portion 3112 and the second connection portion 3113. Preferably, any first connection portion 3112 and the second connection portion 3113 do not overlap, thereby preventing crosstalk between any first connection portion 3112 and the second connection portion 3113 .

[0067] In some optional embodiments, referring to Figure 10 , Figure 10 yes Figure 3 In a cross-sectional view taken along the BB' direction, the first connecting portion 3112 overlaps with the i-1th auxiliary signal line 211 in a direction perpendicular to the plane of the substrate 91; a shielding layer 511 is further included between the first connecting portion 3112 and the i-1th auxiliary signal line 211 in a direction perpendicular to the plane of the substrate 91.

[0068] Figure 10In the figure, only the first connection part 3112 is located between the first metal layer 202 and the third metal layer 205 as an example for explanation. The first connection part 3112 here is in a direction perpendicular to the plane where the base substrate 91 is located. The first connection part 3112 is connected to the third auxiliary signal line 211. There are also the fourth first data line 111, the first auxiliary signal line 211 and the second auxiliary signal line 211 between the first data line 111 and the auxiliary signal line 211. Therefore, in the direction perpendicular to the plane where the base substrate 9191 is located, the first connection part 3112 needs to overlap with the fourth first data line 111, the first auxiliary signal line 211 and the second auxiliary signal line 211, which will cause crosstalk. In this embodiment, a shielding layer 511 is also included between the first connection part 3112 and the i-1th auxiliary signal line 211. Figure 10 The schematic diagram illustrates that a shielding layer 511 is provided between the first connection portion 3112 and both the first auxiliary signal line 211 and the second auxiliary signal line 211. It is understood that when the first connection portion 3112 is located only on the first metal layer 202, it is sufficient to provide the shielding layer 511 between the first metal layer 202 and the second metal layer 204 to prevent crosstalk between the first connection portion 3112 and the (i-1)th auxiliary signal line 211. When the first connection portion 3112 is located only on the third metal layer 205, it is sufficient to provide the shielding layer 511 between the third metal layer 205 and the second metal layer 204 to prevent crosstalk between the first connection portion 3112 and the (i-1)th auxiliary signal line 211. The shielding layer 511 herein can be metal and connected to a zero-potential signal. This is not specifically limited here, as long as it can serve to shield against crosstalk.

[0069] In some optional embodiments, referring to Figure 11 , Figure 11 3 is a schematic diagram of a planar structure of another display panel provided by the present invention. The number of connection portions 311 connected to the same auxiliary signal line 211 is positively correlated with the resolution of the display panel 100 .

[0070] It is understood that the higher the resolution of the display panel 100, the greater the number of pixels PX in the display area AA, the greater the load on the first data line 111, and the overall resistance in the edge display area AA2 equals the sum of the resistance of the first data line 111 itself and the load resistance of the pixels PX. The higher the resolution, the greater the number of pixels PX, the greater the load resistance of the pixels PX, and the greater the display difference between the edge display area AA2 and the middle display area AA1. In this case, more connecting portions 311 can be provided to connect the first data line 111 in parallel with the auxiliary signal line 211. A greater number of connecting portions 311 helps reduce resistance, making the overall resistance of the edge display area AA2 closer to the overall resistance of the middle display area AA1, thereby improving display uniformity.

[0071] In some optional embodiments, continue to refer to Figure 11 The number of the connection portions 311 connected to the auxiliary signal line 211 is positively correlated with the number of pixels PX loaded on the first data line 111 .

[0072] It can be understood that the overall resistance in the edge display area AA2 is equal to the sum of the resistance of the first data line 111 itself and the load resistance of the pixel PX. The more load pixels PX on the first data line 111, the greater the pixel PX load resistance, and the greater the display difference between the edge display area AA2 and the middle display area AA1. In this case, more connecting portions 311 can be provided to connect the first data line 111 and the auxiliary signal line 211 in parallel. A larger number of connecting portions 311 helps reduce resistance, making the overall resistance of the edge display area AA2 closer to the overall resistance of the middle display area AA1, thereby improving display uniformity.

[0073] In some optional embodiments, continue to refer to Figures 2 to 6 ,as well as Figure 11 The number of connection portions 311 connected to the same auxiliary signal line 211 is greater than or equal to 2 and less than or equal to 10.

[0074] It is understood that a greater number of connection portions 311 connected to the same auxiliary signal line 211 is more conducive to reducing the resistance of the first data line 111 in the edge display area AA2, thereby making the resistance of the first data line 111 in the edge display area AA2 close to the resistance of the first data line 111 in the middle display area AA1. However, the number of connection portions 311 cannot be too large. As mentioned above, the connection portions 311 are generally arranged between adjacent pixels in the column direction Y. If there are too many connection portions 311, they will interfere with other wiring between pixels. In this embodiment, the number of connection portions 311 connected to the same auxiliary signal line 211 is greater than or equal to 2 and less than or equal to 10, which can reduce the resistance of the first data line 111 in the edge display area AA2 while preventing the wiring of other wiring lines from being disrupted due to the excessive number of connection portions 311.

[0075] In some optional embodiments, referring to Figure 12 , Figure 12 Schematic diagram of another display panel provided by the present invention. Along the row direction X, the display area AA includes a middle display area AA1 and edge display areas AA2 located on both sides of the middle display area AA1. The first data line 111 in the middle display area AA1 is electrically connected to the bonding pad 411.

[0076] certainly Figure 12 The number of the first data lines 111 in the middle edge display area AA2 and the middle display area AA1 is only for schematic illustration.

[0077] It is understandable that the first data line 111 in the middle display area AA1 can be directly electrically connected to the binding pad 411 without winding, so there is no need to set an auxiliary signal line 211 connected thereto.

[0078] In the present invention, an auxiliary signal line 211 is provided in the middle display area AA1 to be electrically connected to the first data line 111 in the edge display area AA2. The first data line 111 in the edge display area AA2 does not need to be wound. After the auxiliary signal line 211 is connected in parallel with the first data line 111, the resistance of the first data line 111 in the edge display area AA2 is close to the resistance of the first data line 111 in the middle display area AA1, thereby improving display uniformity.

[0079] In some alternative embodiments, please refer to Figure 13 , Figure 13 1 is a schematic diagram of a planar structure of a display device provided in an embodiment of the present invention. The display device 1000 provided in this embodiment includes the display panel 100 provided in the above embodiment of the present invention. Figure 13 The embodiment only uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device 1000 provided in the embodiment of the present invention can be a computer, a television, an in-vehicle display device, or other display device 1000 having a display function, and the present invention does not specifically limit this. The display device 1000 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention. For details, please refer to the detailed description of the display panel 100 in the above embodiments, and this embodiment will not be repeated here.

[0080] It can be seen from the above embodiments that the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0081] The display panel of the present invention includes first data lines and auxiliary signal lines extending along the column direction, part of the first data lines is only located in the display area, at least part of the first data lines are electrically connected to the auxiliary signal lines through multiple connecting parts extending along the row direction, the auxiliary data lines are electrically connected to the binding pads, and the data signals are transmitted to the first data lines through the auxiliary signal lines and the connecting parts. On the one hand, in the related art, all the first data lines are directly connected to the binding pads, while the first data lines located at the edges on both sides of the row direction need to be wound when connected to the binding pads, which will make the area of ​​the lower frame larger and cannot achieve a narrow frame. In the present invention, the first data lines at the edges on both sides of the row direction are only located in the display area and are electrically connected to the binding pads through the auxiliary signal lines located in the middle area. In this way, no winding is required in the lower frame, which is conducive to achieving a narrow frame. On the other hand, in order to reduce winding, the related art will adopt a fan-out routing method to electrically connect the first data line to the binding pad, but the fan-out routing is only set in the lower area of ​​the display panel close to the binding pad. Since the fan-out routing is usually a metal routing, it causes a difference in reflectivity of the signal lines in the lower and upper areas of the display panel, which causes uneven screen images in the lower and upper areas of the display panel when the display panel is in the screen-off state. In the present invention, the first data line is connected through an auxiliary signal line, and the auxiliary signal line extends to the second area along the column direction, that is, It extends to the upper area of ​​the display panel, so that the signal lines in the first area and the second area are uniform, eliminating the reflectivity difference caused by the signal lines, and improving the problem of uneven pictures in the first area and the second area in the screen-off state; in addition, in order to reduce winding, the related art will adopt a fan-out routing method to electrically connect the first data line to the binding pad. In this way, the first data lines on the edges of the two sides in the row direction have fan-out routing, so their lengths are greater than the length of the first data line in the middle area. Due to the different lengths, the resistances are also different. Therefore, when displaying, the color brightness of the edges of the two sides in the row direction is smaller than the color brightness of the middle area. In the present invention, since it is connected to the first data line through an auxiliary signal line, and the auxiliary signal line and the first data line are connected in parallel through the connecting part, the parallel connection is equivalent to reducing the resistance of the first data lines on the edges of the two sides, so that the resistance of the first data lines in the edges of the two sides is basically consistent with the resistance of the first data lines in the middle area, thereby improving the uniformity of the color brightness of the edge area and the middle area when displaying the picture.

[0082] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that: include: a display area and a non-display area at least partially surrounding the display area, the display area comprising first data lines and auxiliary signal lines extending in a column direction, at least a portion of the first data lines being electrically connected to the auxiliary signal lines via a plurality of connecting portions extending in a row direction, the row direction intersecting the column direction; The non-display area includes a binding area, the binding area includes a binding pad, the display area is composed of a first area and a second area arranged along the column direction, the second area is located on a side of the first area away from the binding area; one end of the auxiliary signal line is electrically connected to the binding pad, and the other end of the auxiliary signal line extends to the top of the second area along the column direction; The display area further includes: substrate; a first metal layer located on one side of the substrate; a second metal layer located on a side of the first metal layer away from the substrate; a third metal layer located on a side of the second metal layer away from the substrate; The first data line and the auxiliary signal line are both located in the second metal layer, the connecting portion is located in the first metal layer and / or the connecting portion is located in the third metal layer.

2. The display panel according to claim 1, wherein: The connection part connected to the same auxiliary signal line includes at least one first sub-connection part and a second sub-connection part, the first sub-connection part is located in the first area, the second sub-connection part is located in the second area, and the arrangement density of the first sub-connection part is equal to the arrangement density of the second sub-connection part.

3. The display panel according to claim 1, wherein: A connection node is formed at a connection position between the connection portion and the auxiliary signal line, and the distances between any two adjacent connection nodes are equal.

4. The display panel according to claim 1, wherein: All the connection portions connected to the same auxiliary signal line are adjacent to each other along the column direction to form a connection portion group, and the connection portion groups corresponding to adjacent auxiliary signal lines are staggered along the column direction.

5. The display panel according to claim 1, wherein: The connection portions connected to different auxiliary signal lines are arranged alternately along the column direction.

6. The display panel according to claim 1, wherein: The lengths of the connection portions connected to any of the auxiliary signal lines in the row direction are all equal.

7. The display panel according to claim 1, wherein: The connection portions connected to any of the auxiliary signal lines have the same width in the column direction.

8. The display panel according to claim 1, wherein: The connecting portion is electrically connected to the first data line and the auxiliary signal line through a via hole.

9. The display panel according to claim 1, wherein: Along the row direction, the display area includes a middle display area and edge display areas located on both sides of the middle display area. In the direction from the edge display area to the middle display area, the edge display area includes the 1st to nth first data lines, and the middle display area includes the 1st to nth auxiliary signal lines, n is a positive integer greater than 1, the first data lines correspond one-to-one to the auxiliary signal lines, the connection part connected to the i-th auxiliary signal line is the first connection part, and the connection part connected to the i-1th auxiliary signal line is the second connection part, i is a positive integer greater than or equal to 2 and less than or equal to n, and in the direction perpendicular to the plane where the base substrate is located, the first connection part and the second connection part have no overlap.

10. The display panel according to claim 9, wherein: In a direction perpendicular to the plane of the substrate, the first connecting portion overlaps with the (i-1)th auxiliary signal line; In a direction perpendicular to the plane where the base substrate is located, a shielding layer is further included between the first connecting portion and the (i-1)th auxiliary signal line.

11. The display panel according to claim 1, wherein The number of the connection parts connected to the same auxiliary signal line is positively correlated with the resolution of the display panel.

12. The display panel according to claim 1, wherein The number of the connection parts connected to the auxiliary signal line is positively correlated with the number of pixels loaded on the first data line.

13. The display panel according to claim 1, wherein The number of the connection parts connected to the same auxiliary signal line is greater than or equal to 2 and less than or equal to 10.

14. The display panel according to claim 1, wherein Along the row direction, the display area includes a middle display area and edge display areas located on both sides of the middle display area, and the first data line in the middle display area is electrically connected to the binding pad.

15. A display device, characterized in that: The display panel comprises any one of claims 1 to 14.

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