A display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises: a substrate; a plurality of signal lines located on one side of the substrate; a plurality of light emitting elements located on the side of the signal lines away from the substrate; wherein the signal lines comprise overlapping portions, in a direction perpendicular to the display panel, the orthogonal projection of the overlapping portions on the substrate is located within the orthogonal projection of the light emitting elements on the substrate; in the direction perpendicular to the display panel, the light emitting layer overlaps with N overlapping portions, wherein N >= 2 and N is an integer; the shapes of at least two overlapping portions are different. The present application can weaken the influence of scattered light of the light emitting elements on the display effect and improve the display quality.

Description

[0001] This application is a divisional application of application number 202011606057.8, application date December 30, 2020, and invention title "A display panel and display device". Technical Field

[0002] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0003] In organic light-emitting display technology, organic light-emitting diodes (OLEDs) serve as light-emitting devices. An OLED includes an anode, a cathode, and an organic light-emitting layer disposed between the anode and cathode. When a voltage is applied to the anode and cathode of the OLED, holes injected from the anode and electrons injected from the cathode combine in the organic light-emitting layer to form excitons. These excitons emit light as they transition from an excited state to the ground state, thereby displaying an image.

[0004] Pixel circuits, typically used to drive organic light-emitting diodes (OLEDs), are fabricated on a substrate, and then the OLEDs are fabricated on top of the pixel circuits. Some signal lines in the pixel circuits are located directly below the OLEDs. Because these signal lines have a certain thickness and are not flat, the OLEDs are fabricated on an uneven surface, leading to uneven dispersion of light generated from the organic light-emitting layer. This phenomenon causes chromatic aberration in the display panel, affecting display quality. Summary of the Invention

[0005] This invention provides a display panel and a display device to solve the color dispersion problem of display panels caused by scattering of light-emitting elements in the prior art.

[0006] In a first aspect, embodiments of the present invention provide a display panel, the display panel comprising:

[0007] Substrate;

[0008] Multiple signal lines are located on one side of the substrate;

[0009] Multiple light-emitting elements are located on the side of the signal line away from the substrate; wherein,

[0010] The signal line includes an overlapping portion, and in the direction perpendicular to the display panel, the orthogonal projection of the overlapping portion onto the substrate is located within the orthogonal projection of the light-emitting element onto the substrate;

[0011] In a direction perpendicular to the display panel, the light-emitting layer overlaps with N overlapping portions, where N≥2 and N is an integer;

[0012] At least two of the overlapping portions have different shapes.

[0013] Secondly, embodiments of the present invention provide a display device, including a display panel provided in any embodiment of the present invention.

[0014] The display panel and display device provided in the embodiments of the present invention have the following beneficial effects: by designing the shape of the overlapping part that overlaps with the light-emitting layer in the direction perpendicular to the display panel, the probability of the scattered light emitted by the light-emitting element being captured by the user's eyes is reduced, the influence of the scattered light of the light-emitting element on the display effect is weakened, the color dispersion problem of the display panel is weakened, and the display quality is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a partial top view of a display panel in the related art;

[0017] Figure 2 for Figure 1 A simplified schematic diagram of a cross section at the position of the tangent line A-A';

[0018] Figure 3 A top view schematic diagram of a display panel provided in an embodiment of the present invention;

[0019] Figure 4 for Figure 3 A simplified schematic diagram of a cross section at the position of the tangent line B-B';

[0020] Figure 5 A partial top view of another display panel provided in an embodiment of the present invention;

[0021] Figure 6 A partial top view of another display panel provided in an embodiment of the present invention;

[0022] Figure 7 A partial top view of another display panel provided in an embodiment of the present invention;

[0023] Figure 8 A partial top view of another display panel provided in an embodiment of the present invention;

[0024] Figure 9 A partial top view of another display panel provided in an embodiment of the present invention;

[0025] Figure 10A partial top view of another display panel provided in an embodiment of the present invention;

[0026] Figure 11 A partial top view of another display panel provided in an embodiment of the present invention;

[0027] Figure 12 A partial top view of another display panel provided in an embodiment of the present invention;

[0028] Figure 13 A partial top view of another display panel provided in an embodiment of the present invention;

[0029] Figure 14 A partial top view of another display panel provided in an embodiment of the present invention;

[0030] Figure 15 A partial top view of another display panel provided in an embodiment of the present invention;

[0031] Figure 16 A partial top view of another display panel provided in an embodiment of the present invention;

[0032] Figure 17 A partial top view of another display panel provided in an embodiment of the present invention;

[0033] Figure 18 A partial top view of another display panel provided in an embodiment of the present invention;

[0034] Figure 19 A partial top view of another display panel provided in an embodiment of the present invention;

[0035] Figure 20 A partial top view of another display panel provided in an embodiment of the present invention;

[0036] Figure 21 A partial top view of another display panel provided in an embodiment of the present invention;

[0037] Figure 22 A partial top view of another display panel provided in an embodiment of the present invention;

[0038] Figure 23 for Figure 22 A schematic diagram of a cross-section at the position of the tangent line C-C';

[0039] Figure 24 for Figure 3 A simplified schematic diagram of another cross section at the position of the tangent line B-B';

[0040] Figure 25This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0043] Figure 1 This is a partial top view schematic diagram of a display panel in related technologies. Figure 2 for Figure 1 A simplified schematic diagram of a cross-section at the position of the tangent line A-A'. (See diagram below.) Figure 1 As shown, a light-emitting element E and a signal line X overlapping with the light-emitting element E are illustrated in the display area. The extension direction of the signal line X is the same as the extension direction f of an edge of the display panel (for example, the long side of the display panel when the display panel is rectangular). When the user views the display panel at a normal viewing angle, the display panel is regarded as a plane, with direction f corresponding to the vertical direction of the plane and direction e corresponding to the horizontal direction of the plane. Figure 2 As illustrated, because signal line X has a certain thickness, the surface of the film layer fabricated on top of signal line X is uneven, i.e., it has certain undulations. Consequently, the light-emitting element E fabricated on it also has certain undulations, causing the light emitted by light-emitting element E to be scattered. The arrows in the diagram indicate the direction of light scattering. When the user is using the device, the scattered light from light-emitting element E in the left and right directions is easily detected by the human eye, which will seriously affect the display effect of the display panel.

[0044] Based on the problems existing in related technologies, embodiments of the present invention provide a display panel. By designing the shape of the overlapping portion where the light-emitting layer overlaps with the light-emitting element in the direction perpendicular to the display panel, the probability of scattered light emitted by the light-emitting element being captured by the user's eyes is reduced, the impact of scattered light from the light-emitting element on the display effect is weakened, the color dispersion problem of the display panel is weakened, and the display quality is improved.

[0045] Figure 3 This is a top view schematic diagram of a display panel provided in an embodiment of the present invention, such as... Figure 3 As shown, the display area AA of the display panel includes multiple sub-pixels sp, each sub-pixel sp includes a light-emitting element 30, the multiple sub-pixels sp are arranged in the pixel row direction x to form pixel row sppH, and the multiple sub-pixels sp are arranged in the pixel column direction y to form pixel column spL, the pixel row direction x and the pixel column direction y intersect each other. Typically, the pixel row direction x and the pixel column direction y are perpendicular to each other. Figure 3 It can also be understood as the display panel as seen by the user at a normal viewing angle in the application. When the user views the display panel at a normal viewing angle, the pixel column direction x is equivalent to the vertical direction of the plane on which the display panel is located, and the pixel row direction x is equivalent to the horizontal direction of the plane on which the display panel is located.

[0046] Figure 4 for Figure 3 A simplified schematic diagram of a cross-section at the position of the midtangent B-B', as shown below. Figure 4 As shown, the display panel includes: a substrate 10; multiple signal lines 20 located on the substrate 10; and multiple light-emitting elements 30 located on the side of the signal lines 10 away from the substrate 10. Each light-emitting element 30 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 stacked sequentially. The signal lines 20 include an overlap portion 21 that overlaps with the light-emitting layer 32 in a direction perpendicular to the z-axis of the display panel. It should be noted that... Figure 4 The diagram only illustrates the relative positional relationship between the overlapping portion 21 of the signal line 20 and the light-emitting element 30. It does not show that the overlapping portion 21 below the light-emitting element 30 causes the light-emitting element 30 to be fabricated on an uneven surface, which in turn causes the first electrode 31, the light-emitting layer 32, and the second electrode 33 of the fabricated light-emitting element 30 to have an undulating morphology (i.e., uneven).

[0047] In some embodiments, the overlapping portion 21 is a straight line or a broken line, and at least a portion of the extending direction of the overlapping portion 21 has an angle θ with the pixel column direction y in the display area AA, where 0° < θ < 90°. Specifically, when the pixel row direction x and the pixel column direction y are perpendicular to each other, the sum of the acute angle between the extending direction of the overlapping portion and the pixel column direction y and the acute angle between its extending direction and the pixel row direction x is 90°. Figure 5 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the overlapping portion 21 is illustrated as a straight line, and the light-emitting layer 32 of the light-emitting element 30 is also shown. The extension direction p of the overlapping portion 21 has an angle θ1 with the pixel column direction y in the display area AA, where 0° < θ1 < 90°. The scattering direction of the light emitted by the light-emitting layer 32 caused by the undulation of the light-emitting layer 32 due to the overlapping portion 21 is shown by the dashed arrow in the figure. Figure 5This is a planar schematic diagram. The dashed arrows in the diagram can be interpreted as the orthographic projection shape of the light scattering direction onto the plane of the display panel. Since the dashed arrows are not parallel to either the pixel column direction (y) or the pixel row direction (x), the probability of the scattered light emitted by the light-emitting element 30 being captured by the user's eye is reduced when the user looks directly at the display panel. This weakens the impact of the scattered light from the light-emitting element on the display effect and improves display quality.

[0048] In some embodiments, the overlapping portion 21 is a curve, and the extension direction of the tangent of at least a portion of the overlapping portion 21 has an angle θ with the pixel column direction y, where 0° < θ < 90°. When the pixel row direction x and the pixel column direction y are perpendicular to each other, the acute angle between the extension direction of the tangent and the pixel column direction y and the acute angle between its extension direction and the pixel row direction x is 90°. Figure 6 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the overlapping portion 21 is illustrated as a C-shaped curve, illustrating the extension directions q' and q" of the tangents at two locations within the overlapping portion 21. The extension direction q' of the tangent forms an angle θ2 with the pixel column direction y, where 0° < θ2 < 90°; the extension direction q" of the tangent forms an angle θ3 with the pixel column direction y, where 0° < θ3 < 90°. The scattering direction of light emitted from the light-emitting layer 32 caused by the undulations in the light-emitting layer 32 due to the overlapping portion 21 is illustrated by the dashed arrows in the figure. Figure 6 Also shown in a planar schematic diagram, the dashed arrows in the diagram can be interpreted as the orthographic projection shape of the light scattering direction onto the plane of the display panel. In this embodiment, at least some of the light scattering directions are not parallel to both the pixel column direction (y) and the pixel row direction (x), and the scattered light is dispersed in multiple directions. When the user looks directly at the display panel, this avoids the scattered light from concentrating in the left-right direction when the user is looking directly at the display panel, reducing the probability that the scattered light emitted by the light-emitting element 30 is captured by the user's eyes, thereby weakening the impact of the scattered light from the light-emitting element on the display effect and improving the display quality.

[0049] In another embodiment, Figure 7 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 7 The diagram illustrates the light-emitting layer 32 and the overlapping portion 21 that overlaps with the light-emitting layer 32. The overlapping portion 21 is a broken line comprising two line segments. One line segment has an angle θ4 between its extension direction s' and the pixel column direction y, where 0° < θ4 < 90°; the other line segment has an angle θ5 between its extension direction s" and the pixel column direction y, where 0° < θ5 < 90°. Figure 7The diagram illustrates a broken line consisting of two interconnected line segments. In another embodiment, the overlapping portion 21 is a broken line, and the number of line segments in the broken line is greater than or equal to 3. In one embodiment, the shape of the overlapping portion is a W-shaped broken line. This embodiment sets the overlapping portion to a broken line, so that different line segments in the broken line cause undulations in the light-emitting layer 32, resulting in different scattering directions of the light emitted by the light-emitting layer 32, thus preventing the scattered light from concentrating in a fixed direction. Furthermore, by designing the extension direction of the line segments in the broken line, the probability of the scattered light emitted by the light-emitting element being captured by the user's eye can be reduced, thereby weakening the impact of the scattered light from the light-emitting element on the display effect and improving display quality.

[0050] Specifically, in embodiments where the overlapping portion 21 is a straight line or a broken line, 45° ≤ θ < 90°. That is, the acute angle between the extension direction of the overlapping portion and the pixel column direction y is greater than or equal to the acute angle between its extension direction and the pixel row direction x. Therefore, in application, the undulations of the light-emitting layer 32 above the overlapping portion 21 cause more scattered light emitted from the light-emitting layer 32 to be emitted obliquely upwards or downwards, and the emission direction is more biased towards the vertical direction relative to the left-right direction when the user uses the display panel. This further reduces the probability of the scattered light emitted by the light-emitting element being captured by the user's eyes, weakening the impact of the scattered light from the light-emitting element on the display effect.

[0051] In some embodiments, the overlapping portion 21 is a curve, and the extension direction of the tangent at different positions of the curve is not exactly the same. The undulation of the light-emitting layer 32 above the curved overlapping portion 21 causes the light emitted by the light-emitting layer 32 to be dispersed in multiple different directions. This avoids the scattered light from being concentrated in the left and right directions when the user looks directly at the display panel, reduces the probability that the scattered light emitted by the light-emitting element 30 is captured by the user's eyes, thereby weakening the impact of the scattered light of the light-emitting element on the display effect and improving the display quality.

[0052] like Figure 6 The overlapping portion 21 is shown as a C-shaped curve with a curvature of K. The length of the light-emitting layer 32 in the pixel column direction is a μm, where 1*10 4 m -1 ≤K≤(2 / a)*10 6 m -1 According to geometric principles, the reciprocal of curvature is the radius of curvature. K ≥ 1 * 10 4 m -1 Then the radius of curvature of the overlapping part 21 is no greater than 100μm, and K is set to ≤ (1 / a)*10 6 m -1 This ensures that the radius of curvature of the overlapping portion 21 is not less than a / 2μm. Typically, the length of a pixel is 20μm, and this embodiment ensures that the overlapping portion 21 below the light-emitting layer 32 is curved.

[0053] In another embodiment, Figure 8 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the overlapping portion 21 is shaped like an S-curve. The tangents at different points on the S-curve extend in different directions. This causes the light emitted by the light-emitting layer 32 above the overlapping portion 21 to undulate in multiple directions, preventing the scattered light from concentrating in the left and right directions when the user is looking directly at the display panel, thus reducing the probability of the scattered light emitted by the light-emitting element 30 being captured by the user's eyes. Furthermore, the overlapping portion 21 of the S-curve can also be considered a combination of two C-curves. In one embodiment, the two C-curves forming the S-curve have the same radius of curvature; in another embodiment, the two C-curves forming the S-curve have different radii of curvature.

[0054] In another embodiment, Figure 9 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the overlapping portion 21 has a composite curve shape. Figure 9 The schematic overlapping portion resembles a combination of interconnected S-shaped and C-shaped curves. Here, the combined curve is understood as a combination of at least two connected S-shaped curves, or at least two connected C-shaped curves, or a combination of S-shaped and C-shaped curves. The combined curve can also be understood as a wavy curve. This embodiment increases the variation in the linear extension direction of the overlapping portion, correspondingly increasing the dispersion direction of the scattered light emitted from the light-emitting layer above the overlapping portion. This prevents the scattered light from concentrating in the left and right directions when the user is looking directly at the display panel, reducing the probability of the scattered light emitted by the light-emitting element being captured by the user's eyes.

[0055] In one embodiment, taking the overlapping portion 21 as an S-shaped curve as an example, Figure 10 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 10 As shown, the overlapping portion 21 of the S-shaped curve is inclined relative to the pixel column direction y. That is, in the embodiment where the overlapping portion 21 is a curve, the shape of the curve can be inclined relative to the pixel column direction y. In addition, in the embodiment where the overlapping portion 21 is a broken line, the shape of the broken line can also be inclined relative to the pixel column direction y.

[0056] The above Figures 5 to 10As illustrated in the embodiment, the width of the overlapping portion 21 is substantially consistent at various positions along its extension direction. In some embodiments, within the plane of the substrate, along the extension direction of the overlapping portion, the orthographic projection of the overlapping portion onto the substrate has at least a first width and a second width, wherein the first width and the second width are not equal. That is, the width of the overlapping portion is not uniform at different positions. This increases the dispersion direction of the scattered light emitted by the light-emitting layer above the overlapping portion, preventing the scattered light from concentrating in the left and right directions when the user is looking directly at the display panel, and reducing the probability that the scattered light emitted by the light-emitting element is captured by the user's eyes.

[0057] Specifically, with Figure 5 Taking the schematic straight-line overlapping part as an example, Figure 11 This is a partial top view of another display panel provided in an embodiment of the present invention. Figure 11 The schematic top view shows that the plane of the paper can be considered the plane of the substrate from the top view angle. When viewed from the top view angle, the overlapping part 21 coincides with its orthographic projection on the substrate, so... Figure 11 The orthographic projection of the overlapping portion 21 onto the substrate is not shown in the diagram. Along the extension direction of the overlapping portion 21, the orthographic projection of the overlapping portion 21 onto the substrate has at least a first width d1 and a second width d2, wherein the first width d1 and the second width d2 are not equal.

[0058] In another embodiment, an S-shaped overlapping portion is used for illustration. Figure 12 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 12 As shown, along the extension direction of the overlapping portion 21, the orthogonal projection of the overlapping portion 21 onto the substrate has at least a first width d1 and a second width d2, and the first width d1 and the second width d2 are not equal.

[0059] In the display panel provided in this embodiment of the invention, the shape of the overlapping portion that overlaps with the light-emitting layer is any one of a straight line, a broken line, or a curve. When the overlapping portion is a straight line, the angle between the extension direction of the overlapping portion and the pixel column direction satisfies a certain range. When the overlapping portion is a curve, the angle between the extension direction of the tangent at at least some positions of the overlapping portion and the pixel column direction satisfies a certain range. In one embodiment, the width of the overlapping portion is substantially the same at each position in its extension direction; in another embodiment, the overlapping portion has different widths at at least two positions in its extension direction. In addition, in some embodiments, one light-emitting layer overlaps with an odd number of overlapping portions; optionally, one light-emitting layer overlaps with one overlapping portion; optionally, one light-emitting layer overlaps with three overlapping portions. In some embodiments, one light-emitting layer overlaps with an even number of overlapping portions; optionally, one light-emitting layer overlaps with two overlapping portions; optionally, one light-emitting layer overlaps with four overlapping portions. When a light-emitting layer overlaps with at least two overlapping portions simultaneously, in one embodiment, the multiple overlapping portions overlapping the same light-emitting layer have the same shape; in another embodiment, the shapes of the at least two overlapping portions overlapping the same light-emitting layer are different. The following detailed examples illustrate the arrangement of the overlapping portions using specific embodiments.

[0060] In some implementations, the light-emitting layer overlaps with an odd number of overlapping portions. Specifically, Figure 13 This is a partial top view of another display panel provided in an embodiment of the present invention. The top view direction of the display panel is parallel to the direction perpendicular to the display panel. Figure 13 As shown, in the direction perpendicular to the display panel, the light-emitting layer 32 overlaps with an odd number (three shown in the figure) of overlapping portions 21, one of which overlaps with the center O of the light-emitting layer 32. The overlapping portion 21 that overlaps with the center O allows the scattered light caused by the overlapping portion 21 to be evenly dispersed in both directions of the overlapping portion, thereby making the directionality of the scattered light from the light-emitting layer 32 relatively uniform and preventing the scattered light from concentrating in a fixed direction and being easily captured by the human eye.

[0061] Figure 13 The diagram only shows the shape of the three overlapping parts 21, which are all straight lines. Figure 13 Taking the shape of the light-emitting layer 32 as a square for illustration, the center O of the light-emitting layer 32 is the geometric center of the square. When the light-emitting layer 32 is a regular shape, the center of the light-emitting layer 32 can be understood as the geometric center of the regular shape. When the light-emitting layer 32 is an irregular shape, the center of the light-emitting layer 32 can be understood as the centroid of the irregular shape.

[0062] In some embodiments, the light-emitting layer overlaps with an even number of overlapping portions in a direction perpendicular to the display panel. These even number of overlapping portions can be any of a straight line, a broken line, or a curve. The shapes of these even number of overlapping portions can be the same or different. By designing the overlap positions of these even number of overlapping portions with the light-emitting layer, the direction of the scattered light caused by the overlapping portions can be ensured to be at least partially non-parallel to both the pixel column direction (y) and the pixel row direction (x). This prevents the scattered light from concentrating in the left-right direction when the user is looking directly at the display panel, reducing the probability of the scattered light emitted by the light-emitting element being captured by the user's eyes.

[0063] Specifically, in one embodiment, Figure 14 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 14 As shown, only a simplified illustration of the light-emitting layer 32 and its overlapping portions 21 is presented. In the direction perpendicular to the display panel, the even number of overlapping portions 21 do not overlap with the center O of the light-emitting layer 32. The illustration only shows one light-emitting layer 32 overlapping with two overlapping portions 21, illustrating that the two overlapping portions 21 have the same shape and are both straight-line overlapping portions. In this embodiment, the overlapping positions of the overlapping portions and the light-emitting layer are all offset from the center of the light-emitting layer. Therefore, the overlapping portions overlap with the near-edge portion of the light-emitting layer. When the light-emitting element emits light, it ensures that scattered light is emitted as much as possible at the edge of the light-emitting element, reducing the scattered light at the center of the light-emitting element. Combined with the shape of the overlapping portions, the scattering direction of at least a portion of the light emitted by the light-emitting element is not parallel to the pixel column direction or pixel row direction. In application, this avoids the scattered light from concentrating in the left and right directions when the user is looking directly at the display panel, reducing the probability of the scattered light emitted by the light-emitting element being captured by the user's eyes, thereby weakening the impact of the scattered light from the light-emitting element on the display effect.

[0064] Specifically, such as Figure 14 As shown, the orthographic projections of the even-numbered overlapping portions 21 onto the substrate are located on both sides of the center O of the orthographic projection of the light-emitting layer 32 onto the substrate. This allows the scattered light emitted by the light-emitting layer to be dispersed towards both sides of the center of the light-emitting layer, thus making the directionality of the scattered light relatively dispersed and preventing the scattered light from concentrating in a fixed direction and being easily captured by the human eye.

[0065] Specifically, Figure 15 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 15As shown, the even-numbered overlapping portions 21 are axially symmetrical about the first axis of symmetry Z1 in their orthogonal projection onto the substrate. The center O of the orthogonal projection of the light-emitting layer 32 onto the substrate is located on the first axis of symmetry Z1. The overlapping portions are illustrated in the figure as C-shaped curves. This embodiment allows the scattered light emitted by the light-emitting layer to be uniformly emitted in both directions to the sides of the center of the light-emitting layer. The directionality of the scattered light is relatively uniform, and at least some of the light rays are not parallel to the pixel column direction or the pixel row direction, thus preventing the scattered light rays from concentrating in a fixed direction and being easily captured by the human eye.

[0066] Figure 15 The diagram illustrates that the extension direction of the first axis of symmetry Z1 is approximately parallel to the pixel column direction y. In another embodiment, the extension direction of the first axis of symmetry Z1 and the pixel column direction y form an acute angle of a certain size.

[0067] In some implementations, the light-emitting layer overlaps with N overlapping portions in the direction perpendicular to the display panel, where N ≥ 2 and N is an integer; the N overlapping portions have different shapes. Specifically, taking N = 2 as an example, Figure 16 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 16 As shown, in the direction perpendicular to the display panel, the light-emitting layer 32 overlaps with overlapping portions 21-1 and 21-2. Overlapping portion 21-1 is a straight line, while overlapping portion 21-2 is a curve. Because the shapes of the overlapping portions are different, the emitted directions of the scattered light from the light-emitting layer differ, thus making the scattering direction of the scattered light emitted by the light-emitting layer more dispersed. Furthermore, at least some of the scattered light is not parallel to the pixel column direction or pixel row direction, preventing the scattered light from concentrating in a fixed direction and becoming easily captured by the human eye.

[0068] In some embodiments, the plurality of light-emitting elements include adjacent first light-emitting elements and second light-emitting elements. The first light-emitting element includes a first light-emitting layer, and the second light-emitting element includes a second light-emitting layer. The shapes of the overlapping portions of the first light-emitting layer and the second light-emitting layer are different, so that the scattering pattern of the scattered light emitted by the first light-emitting layer is different from that of the scattered light emitted by the second light-emitting layer, thus avoiding the periodic dispersion problem caused by the scattering pattern of the scattered light of adjacent light-emitting elements being the same.

[0069] The relevant parameters for the overlapping portion that overlaps with the light-emitting layer include: the shape of the overlapping portion, the width of the overlapping portion, and the number of overlapping portions that overlap with the same light-emitting layer. When the shapes of the overlapping portions that overlap with two adjacent light-emitting elements are different, the above three relevant parameters can be arbitrarily combined. The term "different shapes" can be understood as follows.

[0070] When each light-emitting layer overlaps with an overlapping portion, the shape of the overlapping portion with the first light-emitting layer is different from the shape of the overlapping portion with the second light-emitting layer. For example, the overlapping portion with the first light-emitting layer may be a straight line, while the overlapping portion with the second light-emitting layer may be a curve. Alternatively, both the overlapping portions with the first and second light-emitting layers may be straight lines, but the angle between the extension direction of the overlapping portion with the first light-emitting layer and the pixel column direction may differ from the angle between the extension direction of the overlapping portion with the second light-emitting layer and the pixel column direction. Alternatively, the overlapping portions with the first and second light-emitting layers may be two different curved shapes. Furthermore, the two overlapping portions overlapping adjacent light-emitting elements may have the same line shape, but different line widths.

[0071] The number of overlapping portions with the first light-emitting layer and the number of overlapping portions with the second light-emitting layer are different, so as to achieve different overall shapes for the overlapping portions with the first light-emitting layer and the overlapping portions with the second light-emitting layer. When the light-emitting layer overlaps with at least two overlapping portions, the overlapping portions with the same light-emitting layer can be configured to have different shapes and / or different widths.

[0072] Specifically, in one embodiment, the shape of the overlapping portion of the light-emitting layer that overlaps with the light-emitting layers of two adjacent light-emitting elements is different. Optionally, the shape of the overlapping portion that overlaps with one of the light-emitting layers is a straight line, and the shape of the overlapping portion that overlaps with the other light-emitting layer is a curve. Figure 17 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 17 As shown, the plurality of light-emitting elements include adjacent first light-emitting element 30a and second light-emitting element 30b. The first light-emitting element 30a includes a first light-emitting layer 32a, and the second light-emitting element 30b includes a second light-emitting layer 32b. The shapes of the overlapping portions 21 that overlap with the first light-emitting layer 32a and the overlapping portions 21 that overlap with the second light-emitting layer 32b are different. The overlapping portion 21 that overlaps with the first light-emitting layer 32a is curved, while the overlapping portion 21 that overlaps with the second light-emitting layer 32b is straight.

[0073] Specifically, in one embodiment, the number of overlapping portions that overlap with the light-emitting layers of two adjacent light-emitting elements is different. Figure 18 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 18As shown, the first light-emitting element 30a and the second light-emitting element 30b are adjacent to each other. The first light-emitting element 30a includes a first light-emitting layer 32a, and the second light-emitting element 30b includes a second light-emitting layer 32b. The first light-emitting layer 32a overlaps with a curved overlapping portion 21; the second light-emitting layer 32b overlaps with overlapping portions 21-3 and 21-4. The overlapping portion 21-3 is a broken line, and the overlapping portion 21-4 is a straight line.

[0074] Specifically, in one embodiment, the angle between the overlapping portion and the pixel column direction is designed to achieve a different shape for the overlapping portion that overlaps with the light-emitting layers of two adjacent light-emitting elements. Figure 19 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 19 As shown, the overlapping portion 21-5 that overlaps with the first light-emitting layer 32a and the overlapping portion 21-6 that overlaps with the second light-emitting layer 32b are both straight lines. The angle between the overlapping portion 21-5 and the pixel column direction y is θ7, and the angle between the overlapping portion 21-6 and the pixel column direction y is θ6. θ7≠θ6.

[0075] In another embodiment, Figure 20 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 20 As shown, the plurality of light-emitting elements include an adjacent first light-emitting element 30a and a second light-emitting element 30b. The first light-emitting element 30a includes a first light-emitting layer 32a, and the second light-emitting element 30b includes a second light-emitting layer 32b. The shape of the overlapping portion 21 that overlaps with the first light-emitting layer 32a is the same as the shape of the overlapping portion 21 that overlaps with the second light-emitting layer 32b. Figure 20 The illustration only shows one light-emitting layer overlapping with one overlapping portion. This embodiment is also applicable to embodiments where one light-emitting layer overlaps with two or more overlapping portions simultaneously. This embodiment first designs the shape of the overlapping portion with the light-emitting layer to ensure that the scattering direction of at least a portion of the light emitted by the light-emitting layer is not parallel to either the pixel column direction or the pixel row direction. This reduces the probability of the scattered light emitted by the light-emitting element being captured by the user's eye, weakening the impact of the scattered light on the display effect. Simultaneously, it ensures that the scattering pattern of the scattered light emitted by the first light-emitting layer is approximately the same as that of the scattered light emitted by the second light-emitting layer, which is beneficial for achieving consistent light emission patterns of the light-emitting elements during display, thus ensuring the overall uniformity of the display panel.

[0076] Furthermore, Figure 21 This is a partial top view of another display panel provided in an embodiment of the present invention, as shown below. Figure 21As shown, the overlapping portion is still illustrated as a curve. The overlapping portion 21 that overlaps with the first light-emitting layer 32a and the overlapping portion 21 that overlaps with the second light-emitting layer 32b are symmetrical about the second axis of symmetry Z2, which is parallel to the pixel column direction y. This embodiment ensures that the scattering patterns of the scattered light emitted by the light-emitting elements on both sides of the second axis of symmetry are approximately the same, which is beneficial for achieving consistent light emission patterns of the light-emitting elements within a local display area of ​​the display panel. It should be noted that... Figure 21 The illustration shows only one light-emitting layer overlapping with one overlapping portion. This embodiment is also applicable to embodiments where one light-emitting layer overlaps with two or more overlapping portions simultaneously.

[0077] In one embodiment, the first overlapping portion and the second overlapping portion, which overlap with the same light-emitting layer, are located in different layers of the display panel. Figure 22 This is a partial top view of another display panel provided in an embodiment of the present invention. Figure 23 for Figure 22 A schematic diagram of a cross-section at the position of the tangent line C-C'. (Example) Figure 21 As shown, in the direction perpendicular to the display panel, the overlapping portion 21 that overlaps with the light-emitting layer 32 includes a first overlapping portion 21a and a second overlapping portion 21b. However, in the direction perpendicular to the display panel, the first overlapping portion 21a and the second overlapping portion 21b do not overlap.

[0078] like Figure 22 As shown, the display panel includes a first metal layer M1 and a second metal layer M2 located on a substrate 10. A first overlapping portion 21a is located on the first metal layer M1, and a second overlapping portion 21b is located on the second metal layer M2. In this embodiment, the first and second overlapping portions located on different metal layers are not overlapped. Therefore, the unevenness of the light-emitting layer caused by the combined thickness of the first and second overlapping portions in the direction perpendicular to the display panel will not be too large, which means that the unevenness of the light-emitting layer can be weakened to a certain extent. At the same time, increasing the position of the undulation of the light-emitting layer can increase the scattering direction of the scattered light, making the scattered light more uniform, thereby weakening the impact of the scattered light from the light-emitting element on the display effect.

[0079] In another embodiment, in the direction perpendicular to the display panel, the first and second overlapping portions located in different metal layers partially overlap, which is not illustrated in the accompanying drawings. This embodiment can also, to some extent, avoid excessive unevenness in the light-emitting layer caused by the combined thickness of the first and second overlapping portions in the direction perpendicular to the display panel.

[0080] Figure 21The illustration shows one light-emitting layer overlapping with two overlapping portions. In another embodiment, one light-emitting layer overlaps with an odd number of overlapping portions greater than or equal to three, wherein the overlapping portion 21 that overlaps with the light-emitting layer 32 includes the first overlapping portion 21a and the second overlapping portion 21b described above.

[0081] Specifically, Figure 23 The diagram also illustrates a transistor T in the pixel circuit of the display panel, wherein the first electrode 31 of the light-emitting element 30 is connected to the drain (not shown) of the transistor T. The transistor T includes an active layer, a gate, a source, and a drain, wherein the display panel includes at least a gate metal layer and a source / drain metal layer located on the substrate 10, with the gate located on the gate metal layer and the source and drain located on the source / drain metal layers. Figure 23 The diagram illustrates the first metal layer M1 as the gate metal layer and the second metal layer M2 as the source and drain metal layers. That is, the first overlapping portion 21a is located on the same layer as the gate, and the second overlapping portion 21b is located on the same layer as the source and drain.

[0082] In one embodiment, Figure 24 for Figure 3 A simplified diagram of another cross-section at the position of the mid-tangent B-B'. (See diagram below.) Figure 24 As shown, the display panel also includes a first metal layer M1 and a second metal layer M2 located on the substrate 10, wherein the thickness of the second metal layer M2 is greater than the thickness of the first metal layer M1; wherein the overlapping portion 21 is located on the second metal layer M2. A planarization layer 60 is located between the overlapping portion 12 and the light-emitting element 30. During the manufacturing of the display panel, the planarization layer 60 is fabricated after the process of the overlapping portion 21, and then the light-emitting element 30 is fabricated on the planarization layer 60. The planarization layer 60 provides a relatively flat surface to ensure the flatness of the light-emitting layer 32 in the light-emitting element 30. However, due to the large thickness of the overlapping portion 21, and the limited thickness that the planarization layer 60 can be coated due to process limitations, the planarization layer 60 fabricated on the overlapping portion 21 will still have certain undulations at the position corresponding to the overlapping portion 21, resulting in the light-emitting layer 32 overlapping with the overlapping portion 21 not being flat. By designing the shape of the overlapping portion 21 in this embodiment of the invention, at least part of the scattering direction of the scattered light emitted by the light-emitting layer 32 is not parallel to the pixel column direction and the pixel row direction. In application, this avoids the scattered light from concentrating in the left and right directions when the user looks directly at the display panel, reducing the probability that the scattered light emitted by the light-emitting element is captured by the user's eyes, thereby weakening the impact of the scattered light of the light-emitting element on the display effect and improving the display quality.

[0083] Specifically, Figure 24The diagram also illustrates a transistor T in the display panel. Transistor T includes a gate g1, a source g2, and a drain g3, wherein the first electrode 31 of the light-emitting element 30 is connected to the drain g3. The overlapping portion 21 is located on the same layer as the source g2 and the drain g3. Optionally, in this embodiment, the material for the second metal layer includes titanium / aluminum / titanium. The material for the first metal layer includes molybdenum.

[0084] In another embodiment, the display panel includes a transistor structure located on a substrate, wherein an overlap is located between the transistor structure and the light-emitting element, which is not illustrated in the accompanying drawings.

[0085] This invention also provides a display device. Figure 25 This is a schematic diagram of a display device provided in an embodiment of the present invention, such as... Figure 25 As shown, the display device includes the display panel 100 provided in any embodiment of the present invention. In the embodiments of the present invention, the display device can be any device with display functionality, such as a mobile phone, tablet computer, laptop computer, e-reader, television set, smart wearable product, etc.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes: Substrate; Multiple signal lines are located on one side of the substrate; Multiple light-emitting elements are located on the side of the signal line away from the substrate; wherein, The signal line includes an overlapping portion, and in the direction perpendicular to the display panel, the orthogonal projection of the overlapping portion onto the substrate is located within the orthogonal projection of the light-emitting element onto the substrate; In a direction perpendicular to the display panel, the light-emitting element overlaps with N overlapping portions, where N≥2 and N is an integer; At least two of the overlapping portions have different shapes; The light-emitting element includes an adjacent first light-emitting element and a second light-emitting element, wherein, The shape of the overlapping portion that overlaps with the first light-emitting element is different from the shape of the overlapping portion that overlaps with the second light-emitting element; and / or, the width of the overlapping portion that overlaps with the first light-emitting element is different from the width of the overlapping portion that overlaps with the second light-emitting element; and / or, the number of overlapping portions that overlap with the first light-emitting element is different from the number of overlapping portions that overlap with the second light-emitting element.

2. The display panel according to claim 1, characterized in that, The light-emitting element includes a first electrode, a light-emitting layer, and a second electrode stacked sequentially. The orthographic projection of the overlapping portion onto the substrate lies within the orthographic projection of the light-emitting layer onto the substrate.

3. The display panel according to claim 1, characterized in that, In the plane of the substrate, along the extending direction of the overlapping portion, the orthographic projection of the overlapping portion onto the substrate has at least a first width and a second width, wherein the first width and the second width are not equal.

4. The display panel according to claim 1, characterized in that, In the direction perpendicular to the display panel, the overlapping portion includes a first overlapping portion and a second overlapping portion; The display panel includes a first metal layer and a second metal layer, with the first overlapping portion located on the first metal layer and the second overlapping portion located on the second metal layer; wherein, in a direction perpendicular to the display panel, the first overlapping portion and the second overlapping portion at least partially overlap.

5. The display panel according to claim 1, characterized in that, The display panel further includes a first metal layer and a second metal layer, wherein the thickness of the second metal layer is greater than the thickness of the first metal layer; wherein... The overlapping portion is located in the second metal layer.

6. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 5.

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