Display panel and display device

Abstract

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel provided by the invention comprises a substrate, a pixel driving circuit, a first conductive layer, a first flat layer, a pixel definition layer and a light emitting device. The first flat layer at least comprises the first flat sub-layer and the second flat sub-layer which are stacked, the first flat sub-layer is closer to the substrate than the second flat sub-layer, and the flatness of the side, away from the substrate, of the second flat sub-layer is higher than that of the side, away from the substrate, of the first flat sub-layer. Under the condition, the flatness of the side, away from the substrate, of the first flat layer is good, and it can be guaranteed that the stability of the light-emitting device formed on the side, away from the substrate, of the first flat layer is high. Especially for the second type of light-emitting devices, the flatness of the side, away from the substrate, of the first flat layer is good, the flatness of the anodes of the second type of light-emitting devices can be effectively improved, the front light emitting efficiency of the second type of light-emitting devices is improved, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] A display panel that uses organic light emitting diodes (OLED) to emit light to realize display functions is called an OLED display panel. It has become a mainstream display structure due to its high color gamut, lightness, and flexibility.

[0003] OLEDs generally include: an anode, a cathode, and a light-emitting layer located between the anode and the cathode. Different voltages are applied to the anode and the cathode respectively to stimulate the light-emitting layer to emit light. Part of the light emitted by the light-emitting layer needs to be reflected by the anode and then emitted at the light-emitting side of the OLED display panel.

[0004] However, since there is a metal conductive layer underneath the OLED, which includes multiple conductive wires, the presence of the conductive wires causes the anode of the OLED formed above to be uneven. Therefore, the emission angle of part of the light reflected by the anode is large, resulting in low front light emission efficiency of the OLED, affecting the display effect of the display panel. Summary of the invention

[0005] The embodiments of the present application provide a display panel and a display device, which can solve the problem of poor display effect of the display panel in the prior art. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, the display panel comprising: a substrate, a pixel driving circuit, a first conductive layer, a first flat layer, a pixel definition layer and a light emitting device;

[0007] There are multiple pixel driving circuits, and the multiple pixel driving circuits are all located on the same side of the substrate;

[0008] The first conductive layer is located on a side of the pixel driving circuit away from the substrate, and the first conductive layer includes: a plurality of switching electrodes electrically connected to the plurality of pixel driving circuits;

[0009] The first flat layer is located on a side of the first conductive layer away from the substrate, the first flat layer at least comprising: a first sub-flat layer and a second sub-flat layer stacked, the first sub-flat layer is closer to the substrate than the second sub-flat layer, and the flatness of the second sub-flat layer on a side away from the substrate is higher than the flatness of the first sub-flat layer on a side away from the substrate;

[0010] The pixel definition layer is located on a side of the first planar layer away from the substrate, and the pixel definition layer has a plurality of first pixel openings;

[0011] There are multiple light-emitting devices, and the multiple light-emitting devices correspond to the multiple first pixel openings and the multiple switching electrodes; at least part of the light-emitting devices is located in the corresponding first pixel openings and is electrically connected to the corresponding switching electrodes;

[0012] The orthographic projection of the light-emitting device on the substrate overlaps with the orthographic projection of the first conductive layer on the substrate.

[0013] Optionally, the first sub-planar layer has a plurality of first via holes, the second sub-planar layer has a plurality of second via holes, and the plurality of first via holes are connected to the plurality of second via holes correspondingly;

[0014] The plurality of first via holes correspond to the plurality of switching electrodes, the plurality of second via holes correspond to the plurality of light-emitting devices, and the light-emitting devices are electrically connected to the corresponding switching electrodes through the corresponding second via holes and the first via holes.

[0015] Optionally, a first orthographic projection of an opening of the first via hole facing away from the substrate on the substrate is located within a second orthographic projection of an opening of the second via hole facing the substrate on the substrate; and an outer boundary of the first orthographic projection does not overlap with an outer boundary of the second orthographic projection.

[0016] Optionally, the thickness of the first sub-planar layer and the second sub-planar layer in a direction perpendicular to the substrate is both in a range of 1 micrometer to 1.5 micrometers.

[0017] Optionally, the plurality of light emitting devices include: a plurality of first-category light emitting devices and a plurality of second-category light emitting devices;

[0018] The plurality of first-type light-emitting devices and the plurality of second-type light-emitting devices are arranged in a plurality of columns along the first direction and in a plurality of rows along the second direction;

[0019] The first conductive layer further comprises: a plurality of conductive blocks and a plurality of conductive lines; the overall extension direction of the conductive lines is parallel to the second direction;

[0020] Among them, the multiple conductive blocks correspond to multiple first-type light-emitting devices, and the orthographic projection of the first-type light-emitting devices on the substrate is located within the orthographic projection of the corresponding conductive blocks on the substrate; the orthographic projection of the second-type light-emitting device on the substrate overlaps with the orthographic projection of at least one of the conductive lines on the substrate.

[0021] Optionally, the first conductive layer further includes: a connecting wire, wherein two ends of the connecting wire are respectively electrically connected to two adjacent conductive blocks distributed in the second direction.

[0022] Optionally, in the second direction, two connecting wires are arranged between two adjacently distributed conductive blocks, and the two connecting wires are arranged opposite to each other in the first direction;

[0023] The two adjacent conductive blocks in the second direction and the two connecting lines between the two adjacent conductive blocks are used to enclose a first hollow area, and at least one switching electrode is distributed in the first hollow area.

[0024] Optionally, at least two conductive lines are distributed between two adjacent columns of conductive blocks;

[0025] The orthographic projection of the second type of light emitting device on the substrate overlaps with the orthographic projection of at least two conductive lines distributed between two adjacent columns of the conductive blocks on the substrate.

[0026] Optionally, the at least two conductive lines distributed between two adjacent columns of the conductive blocks include: a first conductive line and a second conductive line; the overall extension direction of the first conductive line and the second conductive line is parallel to the second direction;

[0027] The first conductive line includes: a plurality of first line segments and a plurality of second line segments; the plurality of first line segments and the plurality of second line segments are alternately connected in the second direction; the orthographic projection of the first line segments on the substrate overlaps with the orthographic projection of the second type of light emitting device on the substrate, and the second line segments are distributed between two adjacent first type of light emitting devices in the first direction;

[0028] The second conductive line includes: a plurality of third line segments and a plurality of fourth line segments; the plurality of third line segments and the plurality of fourth line segments are alternately connected in the second direction; the orthographic projection of the third line segments on the substrate overlaps with the orthographic projection of the second type of light-emitting device on the substrate, and the fourth line segments are distributed between two adjacent first type of light-emitting devices in the first direction.

[0029] Optionally, for the second line segment and the fourth line segment distributed between two adjacent first-type light-emitting devices in the first direction, the second line segment and the fourth line segment are used to enclose a second hollow area;

[0030] The maximum distance of the second hollow area in the first direction is greater than the distance between the first line segment and the third line segment adjacently distributed in the first direction.

[0031] Optionally, the display panel further comprises: a plurality of first electrodes arranged separately; the plurality of first electrodes are electrically connected to the plurality of switching electrodes; the plurality of first electrodes correspond to the plurality of light-emitting devices, and the anodes in the light-emitting devices are parts of the corresponding first electrodes;

[0032] The orthographic projection of the first electrode corresponding to the second type of light-emitting device on the substrate overlaps with the orthographic projections of the first line segment and the third line segment adjacently distributed in the first direction on the substrate;

[0033] For the second line segment and the fourth line segment distributed between two adjacent first-type light-emitting devices in the first direction, the orthographic projection of the second line segment on the substrate overlaps with the orthographic projection of the first electrode corresponding to one of the first-type light-emitting devices on the substrate, and the orthographic projection of the fourth line segment on the substrate overlaps with the orthographic projection of the first electrode corresponding to another first-type light-emitting device on the substrate.

[0034] Optionally, the at least two conductive lines distributed between two adjacent columns of the conductive blocks include: a third conductive line and a fourth conductive line; the third conductive line is distributed on a side of the first conductive line away from the second conductive line, and the fourth conductive line is distributed on a side of the second conductive line away from the first conductive line;

[0035] The third conductive line comprises: a plurality of fifth line segments which are separately arranged, the extension directions of the plurality of fifth line segments are all parallel to the second direction, the plurality of fifth line segments are sequentially arranged along the second direction, and the plurality of fifth line segments are electrically connected to a plurality of the conductive blocks in a column of the conductive blocks; the orthographic projection of the fifth line segments on the substrate overlaps with the orthographic projection of the second type of light emitting device on the substrate;

[0036] The fourth conductive line includes: a plurality of sixth line segments that are separately arranged, the extension directions of the plurality of sixth line segments are all parallel to the second direction, the plurality of sixth line segments are arranged in sequence along the second direction, and the plurality of sixth line segments are electrically connected to a plurality of the conductive blocks in a column of the conductive blocks; the orthographic projection of the sixth line segment on the substrate overlaps with the orthographic projection of the second type of light-emitting device on the substrate.

[0037] Optionally, the display panel further includes: a second flat layer, the second flat layer is located between the first flat layer and the pixel definition layer, the second flat layer has a plurality of second pixel openings, and the plurality of second pixel openings are correspondingly connected to the plurality of first pixel openings;

[0038] Wherein, at least part of the light-emitting device is also located in the second pixel opening.

[0039] Optionally, the display panel further comprises: a plurality of first electrodes arranged separately; the plurality of first electrodes are electrically connected to the plurality of switching electrodes; the plurality of first electrodes correspond to the plurality of light-emitting devices, and the anodes in the light-emitting devices are parts of the corresponding first electrodes;

[0040] The second pixel opening corresponds to the multiple first electrodes, a portion of the first electrodes is located on a side of the second flat layer away from the substrate, and another portion of the first electrode is located in the corresponding second pixel opening and covers the side wall of the corresponding second pixel opening.

[0041] On the other hand, a display device is provided, comprising: a power supply component, and a display panel connected to the power supply component, wherein the display panel is any one of the display panels described above.

[0042] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0043] Since the first flat layer at least includes: a first sub-flat layer and a second sub-flat layer which are stacked, the first sub-flat layer is closer to the substrate than the second sub-flat layer, and the flatness of the second sub-flat layer on the side away from the substrate is higher than the flatness of the first sub-flat layer on the side away from the substrate. In this case, the flatness of the first flat layer on the side away from the substrate is better, which can ensure that the light-emitting device formed on the side of the first flat layer away from the substrate has high stability. In particular, for the second type of light-emitting device, the first flat layer on the side away from the substrate has good flatness, which can effectively improve the flatness of the anode of the second type of light-emitting device, improve the front light extraction efficiency of the second type of light-emitting device, and improve the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 is a top view of a display panel provided in an embodiment of the present application;

[0046] Figure 2 yes Figure 1 A partial enlarged view of the display panel at position C is shown;

[0047] Figure 3 yes Figure 2A schematic cross-sectional view of a display panel at AA' is shown;

[0048] Figure 4 yes Figure 2 A schematic cross-sectional view of a display panel at position BB' is shown;

[0049] Figure 5 The display panel provided in the embodiment of the present application is Figure 2 A schematic cross-sectional view at AA';

[0050] Figure 6 yes Figure 5 An enlarged schematic diagram of the middle membrane layer;

[0051] Figure 7 yes Figure 1 Another partial enlarged view of the display panel at position C is shown;

[0052] Figure 8 yes Figure 7 An enlarged schematic diagram of two adjacent first conductive lines and a second conductive line;

[0053] Fig. 9 yes Figure 1 Another partial enlarged view of the display panel at position C is shown;

[0054] Fig.10 The display panel provided in the embodiment of the present application is Figure 2 Another cross-sectional schematic diagram at AA';

[0055] Fig.11 yes Fig.10 An enlarged schematic diagram of the middle membrane layer;

[0056] Fig.12 The display panel provided in the embodiment of the present application is Figure 2 Another cross-sectional schematic diagram at AA'. DETAILED DESCRIPTION

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0058] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a top view of a display panel provided in an embodiment of the present application, Figure 2 yes Figure 1 A partial enlarged view of the display panel at position C is shown. Figure 3 yes Figure 2A schematic cross-sectional view of a display panel at AA′ is shown. The display panel 000 may include: a substrate 100 , a pixel driving circuit P, a first conductive layer 200 , a first planar layer 300 , a pixel definition layer 400 and a light emitting device 500 .

[0059] The display panel 000 has a plurality of pixel driving circuits P, all of which are located on the same side of the substrate 100 . The pixel driving circuits P can be used to be electrically connected to the light emitting device 500 and drive the light emitting device 500 to emit light.

[0060] The first conductive layer 200 of the display panel 000 is located at a side of the pixel driving circuit P away from the substrate 100 , and the first conductive layer 200 may include: a plurality of switching electrodes Z electrically connected to the plurality of pixel driving circuits P correspondingly.

[0061] The first planar layer 300 of the display panel 000 is located on a side of the first conductive layer 200 facing away from the substrate 100 .

[0062] The pixel definition layer 400 of the display panel 000 is located on a side of the first planar layer 300 away from the substrate 100 , and the pixel definition layer 400 has a plurality of first pixel openings K1 .

[0063] The display panel 000 includes a plurality of light-emitting devices 500, and the plurality of light-emitting devices 500 correspond to the plurality of first pixel openings K1. At least a portion of the light-emitting devices 500 is located in the corresponding first pixel openings K1, and the portion of the light-emitting device 500 located in the first pixel openings K1 is in contact with the side of the first flat layer 300 facing away from the substrate 100. The plurality of light-emitting devices 500 also correspond to the plurality of switching electrodes Z, and are electrically connected to the corresponding switching electrodes Z. That is, the light-emitting devices 500 are electrically connected to the corresponding switching electrodes Z, thereby realizing electrical connection between the light-emitting devices 500 and the pixel driving circuit P.

[0064] Exemplarily, the display panel 000 may further include: a first electrode layer 501, a light-emitting layer 502, and a second electrode layer 503. The first electrode layer 501 may be located between the first planar layer 300 and the pixel definition layer 400, the light-emitting layer 502 may be located on a side of the pixel definition layer 400 away from the substrate 100, and the second electrode layer 503 may be located on a side of the light-emitting layer 502 away from the substrate 100.

[0065] The first electrode layer 501 may include: a plurality of first electrodes 5011 corresponding to the plurality of first pixel openings K1. For any one of the first electrodes 5011, the orthographic projection of the first pixel opening K1 on the substrate 100 is located within the orthographic projection of the corresponding first electrode 5011 on the substrate 100. To this end, the portion of the light-emitting layer 502 distributed within the first pixel opening K1 may contact the corresponding first electrode 5011. In this case, for any one of the first pixel openings K1, the portion of the first electrode 5011 in contact with the light-emitting layer 502 at the first pixel opening K1 (usually also referred to as an anode), the portion of the light-emitting layer 502 distributed within the first pixel opening K1, and the portion of the second electrode layer 503 distributed within the first pixel opening K1 (usually also referred to as a cathode) may constitute a light-emitting device 500.

[0066] After the light-emitting device 500 is driven to emit light, part of the light emitted by the light-emitting layer 502 will be directed toward the anode. In order to improve the utilization rate of light and reduce the power consumption of the display panel 000, the anode can use reflective material to reflect the light directed toward the anode to the light-emitting side of the display panel 000, thereby improving the display brightness.

[0067] In the present application, the orthographic projection of the light emitting device 500 on the substrate 100 overlaps with the orthographic projection of the first conductive layer 200 on the substrate 100 .

[0068] For example, Figure 1 and Figure 2 As shown, the first conductive layer 200 may further include: a plurality of conductive blocks 201 and a plurality of conductive lines 202. The plurality of light-emitting devices 500 may include: a plurality of first-type light-emitting devices 500a and a plurality of second-type light-emitting devices 500b, wherein the plurality of first-type light-emitting devices 500a and the plurality of second-type light-emitting devices 500b are arranged in a plurality of columns along the first direction X, and arranged in a plurality of rows along the second direction Y. Here, the first direction X intersects with the second direction Y. For example, the first direction X may be perpendicular to the second direction Y. Among them, the plurality of first-type light-emitting devices 500a correspond to the plurality of conductive blocks 201, and the orthographic projection of the first-type light-emitting devices 500a on the substrate 100 is located within the orthographic projection of the corresponding conductive block 201 on the substrate 100. The orthographic projection of the plurality of second-type light-emitting devices 500b on the substrate 100 overlaps with the orthographic projection of at least one conductive line 202 on the substrate 100.

[0069] It should be noted that the first conductive layer 200 may be a patterned conductive layer, and the first flat layer 300 located on the side of the first conductive layer 200 away from the substrate 100 is made of an organic material, so that the first flat layer 300 on the side away from the substrate 100 has a higher flatness, so as to ensure that the light-emitting device 500 subsequently formed on the side of the first flat layer 300 away from the substrate 100 has a higher stability. However, the current first flat layer 300 is relatively thin and has a relatively weak flatness, which will affect the stability of the light-emitting device 500 subsequently formed on the side of the first flat layer 300 away from the substrate 100, especially the stability of the second type of light-emitting device 500b.

[0070] For example, see Figure 4 , Figure 4 yes Figure 2 A cross-sectional schematic diagram of the display panel at BB' is shown. Since the orthographic projection of the first type light-emitting device 500a on the substrate 100 is located within the orthographic projection of the corresponding conductive block 201 on the substrate 100, the anode of the first type light-emitting device 500a formed on the side of the first flat layer 300 away from the substrate 100 has good flatness. In this case, the light emitting angle of the light reflected by the anode of the first type light-emitting device 500a is small, which can improve the front light emitting efficiency of the first type light-emitting device 500a. Therefore, the first flat layer 300 is thinner and has weaker flatness, and has less influence on the stability of the first type light-emitting device 500a.

[0071] Please refer to Figure 3 , since the orthographic projection of the second type light emitting device 500b on the substrate 100 overlaps with the orthographic projection of at least one conductive line 202 on the substrate 100, the flatness of the anode of the second type light emitting device 500b formed on the side of the first flat layer 300 away from the substrate 100 is poor. In this case, the anode of the second type light emitting device 500b has at least one protrusion corresponding to the at least one conductive line 202 on the side away from the substrate 100, and the side surface of the protrusion will reflect the light emitted by the second light emitting device 500b, and the light after reflection has a large light emitting angle, resulting in low front light emitting efficiency of the second type light emitting device 500b, thereby affecting the display effect of the display panel 000.

[0072] Therefore, the first planarization layer 300 is relatively thin and has relatively weak planarization capability, which has a relatively large impact on the stability of the second type light emitting device 500 b .

[0073] It should be noted that if Figure 1As shown, the first type of light emitting device 500a may include: red light emitting devices 500a1 and blue light emitting devices 500a2 that are alternately distributed, and the second type of light emitting device 500b may be a green light emitting device. In the case where the flatness of the anode of the second type of light emitting device 500b is poor, the front light extraction efficiency of the second type of light emitting device 500b is lower than the front light extraction efficiency of the first type of light emitting device 500a, resulting in the intensity of green light being lower than the intensity of red light and blue light, which may easily cause color deviation in the display screen of the display panel 000, affecting the accurate presentation of colors, thereby affecting the display effect of the display panel 000.

[0074] In the embodiment of this application, please refer to Figure 5 , Figure 5 The display panel provided in the embodiment of the present application is Figure 2 A cross-sectional schematic diagram at AA' in the middle. The first flat layer 300 in the display panel 000 provided in the embodiment of the present application may include: a first sub-flat layer 301 and a second sub-flat layer 302 which are stacked, the first sub-flat layer 301 being closer to the substrate 100 than the second sub-flat layer 302, and the flatness of the second sub-flat layer 302 on the side away from the substrate 100 is higher than the flatness of the first sub-flat layer 301 on the side away from the substrate 100. In this case, the flatness of the first flat layer 300 on the side away from the substrate 100 is better, so that the stability of the light-emitting device 500 formed on the side of the first flat layer 300 away from the substrate 100 can be ensured to be high. In particular, for the second type of light-emitting device 500b, the flatness of the first flat layer 300 on the side away from the substrate 100 is better, which can effectively improve the flatness of the anode of the second type of light-emitting device 500b, improve the front light extraction efficiency of the second type of light-emitting device 500b, and improve the display effect of the display panel 000.

[0075] In summary, the display panel provided by the embodiment of the present application includes: a substrate, a pixel driving circuit, a first conductive layer, a first flat layer, a pixel definition layer and a light-emitting device. Since the first flat layer includes at least: a first sub-flat layer and a second sub-flat layer that are stacked, the first sub-flat layer is closer to the substrate than the second sub-flat layer, and the flatness of the second sub-flat layer on the side away from the substrate is higher than the flatness of the first sub-flat layer on the side away from the substrate. In this case, the flatness of the first flat layer on the side away from the substrate is better, thereby ensuring that the light-emitting device formed on the side of the first flat layer away from the substrate has a higher stability. In particular, for the second type of light-emitting device, the first flat layer on the side away from the substrate has a better flatness, which can effectively improve the flatness of the anode of the second type of light-emitting device, improve the front light extraction efficiency of the second type of light-emitting device, and improve the display effect of the display panel.

[0076] In the examples of this application, please refer to Figure 6 , Figure 6 yes Figure 5 The first sub-planar layer 301 has a plurality of first via holes 301a, and the second sub-planar layer 302 has a plurality of second via holes 302a. The plurality of first via holes 301a and the plurality of second via holes 302a are connected to each other.

[0077] Among them, the plurality of first via holes 301a correspond to the plurality of transfer electrodes Z, and the plurality of second via holes 302a correspond to the plurality of light-emitting devices 500. The light-emitting device 500 is electrically connected to the corresponding transfer electrode Z through the corresponding second via holes 302a and the first via holes 301a. Since the plurality of transfer electrodes Z are electrically connected to the plurality of pixel driving circuits P, the light-emitting device 500 can be electrically connected to the corresponding transfer electrode Z through the corresponding second via holes 302a and the first via holes 301a, thereby realizing the electrical connection between the light-emitting device 500 and the corresponding pixel driving circuit P, and the pixel driving circuit P is used to drive the corresponding light-emitting device 500 to emit light.

[0078] It should be noted that the first via hole 301a and the second via hole 302a can be of various shapes. Exemplarily, the first via hole 301a and the second via hole 302a are both circular via holes. In the embodiment of the present application, when the first via hole 301a and the second via hole 302a are both circular via holes, the diameter of the first via hole 301a can range from 3 microns to 4 microns, and the diameter of the second via hole 302a can range from 3.5 microns to 5 microns.

[0079] The first sub-planarization layer 301 and the second sub-planarization layer 302 are both organic layers, and can be formed by respective one-time patterning processes. Here, one-time patterning process may include: exposure process and development process.

[0080] In the actual process, Figure 5 As shown, the third orthographic projection of the opening of the first via hole 301a facing the substrate 100 on the substrate 100, the opening of the first via hole 301a on the side facing away from the substrate 100 is within the first orthographic projection on the substrate 100, and the outer boundary of the third orthographic projection does not overlap with the outer boundary of the first orthographic projection. That is, in the direction perpendicular to the substrate 100, the opening size of the first via hole 301a gradually decreases in the direction close to the substrate 100.

[0081] Exemplarily, when the first via 301a is a circular via, the diameter of the opening of the first via 301a toward the substrate 100 may range from 3 microns to 4 microns, the diameter of the opening of the first via 301a away from the substrate 100 may also range from 3 microns to 4 microns, and the diameter of the opening of the first via 301a toward the substrate 100 is smaller than the diameter of the opening of the first via 301a away from the substrate 100.

[0082] Similarly, the second orthographic projection of the opening of the second via 302a on the side facing the substrate 100 on the substrate 100, and the opening of the second via 302a on the side facing away from the substrate 100 on the substrate 100 are within the fourth orthographic projection, and the outer boundary of the second orthographic projection does not coincide with the outer boundary of the fourth orthographic projection. That is, in the direction perpendicular to the substrate 100, the opening size of the second via 302a gradually decreases in the direction close to the substrate 100.

[0083] When the second via 302a is a circular via, the diameter of the opening of the second via 302a facing the substrate 100 can range from 3.5 microns to 5 microns, and the diameter of the opening of the second via 302a facing away from the substrate 100 can also range from 3.5 microns to 5 microns, and the diameter of the opening of the second via 302a facing the substrate 100 is smaller than the diameter of the opening of the second via 302a facing away from the substrate 100.

[0084] It should be noted that after forming the first sub-planar layer 301, since the first sub-planar layer 301 has a plurality of first via holes 301a, during the process of forming the second sub-planar layer 302, the organic material will also be filled into the first via holes 301a. To ensure that no organic material remains in the first via holes 301a, the first orthographic projection of the opening of the first via hole 301a on the side away from the substrate 100 may be located within the second orthographic projection of the opening of the second via hole 302a on the side facing the substrate 100, and the outer boundary of the first orthographic projection does not overlap with the outer boundary of the second orthographic projection. That is, the opening size of the first via hole 301a on the side away from the substrate 100 may be smaller than the opening size of the second via hole 302a on the side facing the substrate 100.

[0085] For example, Figure 5 As shown, in the first direction X, the distance d1 between the opening edge of the first via hole 301a away from the substrate 100 and the opening edge of the second via hole 302a toward the substrate 100 is in the range of 0.4 micrometers to 0.75 micrometers. Here, the opening edge of the first via hole 301a away from the substrate 100 and the opening edge of the second via hole 302a toward the substrate 100 are located on the same side of the first via hole 301a and the second via hole 302a. In this case, since the opening size of the first via 301a away from the substrate 100 is smaller than the opening size of the second via 302a toward the substrate 100, the organic material in the first via 301a can be over-exposed during the formation of the second via 302a to ensure that no organic material remains in the first via 301a, and the first via 301a can be connected to the corresponding second via 302a, thereby ensuring that the light-emitting device 500 can be effectively electrically connected to the corresponding transfer electrode Z through the corresponding first via 301a and the second via 302a, thereby improving the yield of the display panel 000.

[0086] In the embodiment of the present application, the thickness of the first sub-flat layer 301 and the second sub-flat layer 302 in the direction perpendicular to the substrate 100 ranges from 1 micron to 1.5 microns. In this case, on the one hand, the flatness of the first sub-flat layer 301 on the side facing away from the substrate 100 is higher than the flatness of the first conductive layer 200 on the side facing away from the substrate 100, and the flatness of the second sub-flat layer 302 on the side facing away from the substrate 100 is higher than the flatness of the first sub-flat layer 301 on the side facing away from the substrate 100. Therefore, the flatness of the first flat layer 300 on the side facing away from the substrate 100 can be ensured to be good, so that the flatness of the anode in the second type of light-emitting device 500b can be ensured to be good, effectively improving the front light extraction efficiency of the second type of light-emitting device 500b, and improving the display effect of the display panel 000; on the other hand, the film thickness of the first flat layer 300 can be ensured to be as small as possible, so as to ensure that the overall thickness of the display panel 000 is small.

[0087] In the examples of this application, please refer to Figure 7 , Figure 7 yes Figure 1 Another partial enlarged view of the display panel at C is shown. The multiple conductive blocks 201 in the first conductive layer 200 may correspond to the multiple first-type light-emitting devices 500a one by one, and the orthographic projection of the first-type light-emitting device 500a on the substrate 100 is located within the orthographic projection of the corresponding conductive block 201 on the substrate 100. The first conductive layer 200 may also include: a connecting wire 203, and the two ends of the connecting wire 203 are respectively electrically connected to two adjacent conductive blocks 201 distributed in the second direction Y. In this case, for any column of first conductive blocks 201, adjacent conductive blocks 201 can be electrically connected through the connecting wire 203.

[0088] It should be noted that the display panel 000 may have a display area and a non-display area, and the non-display area is distributed around the display area. A plurality of light-emitting devices 500 may be located in the display area for displaying the display panel 000, and a plurality of conductive blocks 201 corresponding to the plurality of first-type light-emitting devices 500a are also located in the display area. The display panel 000 may also include: peripheral wiring located in the non-display area, and the peripheral wiring may include: a first power signal line and a second power signal line, and the potential of the power signal loaded on the first power signal line is higher than the potential of the power signal loaded on the second power signal line. That is, the first power signal line may be a high-level power signal line, and the second power signal line may be a low-level power signal line. The first power signal line may be used to apply a high-level power signal to each pixel driving circuit P, and the second power signal line may be used to apply a low-level power signal to each pixel driving circuit P.

[0089] In the embodiment of the present application, any column of electrically connected conductive blocks 201 can be electrically connected to the first power signal line. In this case, since the conductive blocks 201 have a larger area and a smaller resistance, the voltage drop between different positions in the display area of ​​the display panel 000 can be ensured to be smaller, ensuring that the high-level power signal in the display area is relatively balanced, thereby improving the display effect of the display panel 000.

[0090] like Figure 7 As shown, in the second direction Y, two connecting wires 203 are arranged between two adjacent conductive blocks 201, and the two connecting wires 203 are arranged relatively in the first direction X. Among them, two adjacent conductive blocks 201 in the second direction Y and the two connecting wires 203 located between the two adjacent conductive blocks 201 are used to enclose a first hollow area U1, and at least one switching electrode Z is distributed in the first hollow area U1. Exemplarily, as Figure 7 As shown, for any first hollow area U1, two switching electrodes Z are distributed in the first hollow area U1, one of which is used to electrically connect to an adjacent first-type light-emitting device 500a, and the other is used to electrically connect to an adjacent second-type light-emitting device 500b.

[0091] It should be noted that the electrical connection between the light emitting device 500 and the transition electrode Z is achieved by electrically connecting the first electrode 5011 corresponding to the light emitting device 500 to the plurality of transition electrodes Z. Exemplarily, for two transition electrodes Z in any first hollow area U1, one transition electrode Z is used to electrically connect to the first electrode 5011 corresponding to an adjacent first-type light emitting device 500a, and the other transition electrode Z is used to electrically connect to the first electrode 5011 corresponding to an adjacent second-type light emitting device 500b.

[0092] In this way, on the one hand, the wiring space of the first conductive layer 200 can be saved, providing the possibility of laying out more wiring in the first conductive layer 200; on the other hand, a short circuit between the conductive block 201 and the switching electrode Z can be prevented, thereby improving the yield of the display panel 000.

[0093] Please continue to refer to Figure 7, the overall extension direction of the multiple conductive lines 202 in the first conductive layer 200 is parallel to the second direction Y. Exemplarily, the conductive line 202 can be: a data signal line, and a column of pixel driving circuits P distributed in the display area can be electrically connected to the same data signal line. It should be noted that the display panel 000 can also include: a binding area located in the non-display area, and the binding area can be bound and connected to the driver chip. A connecting signal line is also distributed in the non-display area of ​​the display panel 000, one end of the connecting signal line can be electrically connected to the conductive line 202 in the display area, and the other end can be electrically connected to the driver chip. In this way, the driver chip can provide a data signal to a corresponding conductive line 202 through the connecting signal line, so that the corresponding pixel driving circuit P can control the light-emitting device 500 to emit light according to the data signal, thereby driving the display panel 000 to display the picture.

[0094] At least two conductive lines 202 are distributed between two adjacent columns of conductive blocks 201 . In this case, the orthographic projection of the second type light-emitting device 500 b on the substrate 100 overlaps with the orthographic projection of at least two conductive lines 202 distributed between two adjacent columns of conductive blocks 201 on the substrate 100 .

[0095] The at least two conductive lines 202 distributed between two adjacent columns of conductive blocks 201 may include: a first conductive line 2021 and a second conductive line 2022, and the overall extension directions of the first conductive line 2021 and the second conductive line 2022 are both parallel to the second direction Y. Here, the first conductive line 2021 and the second conductive line 2022 can both be data signal lines, for example, the first conductive line 2021 can be electrically connected to the pixel driving circuit P corresponding to each first-type light-emitting device 500a in a column of first-type light-emitting devices 500a, and the second conductive line 2022 can be electrically connected to the pixel driving circuit P corresponding to each second-type light-emitting device 500b in a column of second-type light-emitting devices 500b. The orthographic projection of the first conductive line 2021 and the orthographic projection of the second conductive line 2022 on the substrate 100 can overlap with the orthographic projection of the second type of light-emitting device 500b on the substrate 100, which can save the routing space of the first conductive layer 200 and provide the possibility for laying out more routing lines in the first conductive layer 200.

[0096] Please refer to Figure 8 , Figure 8 yes Figure 71. An enlarged schematic diagram of two adjacent first conductive lines and second conductive lines in FIG. The first conductive line 2021 may include: a plurality of first line segments 2021a and a plurality of second line segments 2021b, and the plurality of first line segments 2021a and the plurality of second line segments 2021b are alternately connected in the second direction Y. The orthographic projection of the first line segment 2021a on the substrate 100 overlaps with the orthographic projection of the second type of light-emitting device 500b on the substrate 100, and the second line segment 2021b is distributed between two adjacent first type of light-emitting devices 500a in the first direction X. The second line segment 2021b may include: a first connecting segment b1, a second connecting segment b2, and a third connecting segment b3 connected in sequence, and the second connecting segment b2 is distributed between the first connecting segment b1 and the third connecting segment b3 in the second direction Y, and the first connecting segment b1 and the third connecting segment b3 are also respectively connected to the two first line segments 2021a distributed on both sides of the second line segment 2021b.

[0097] The second conductive line 2022 may include: a plurality of third line segments 2022a and a plurality of fourth line segments 2022b, the plurality of third line segments 2022a and the plurality of fourth line segments 2022b are alternately connected in the second direction Y. The orthographic projection of the third line segment 2022a on the substrate 100 overlaps with the orthographic projection of the second type light emitting device 500b on the substrate 100, and the fourth line segment 2022b is distributed between two adjacent first type light emitting devices 500a in the first direction X. The fourth line segment 2022b may include: a fourth connecting segment b4, a fifth connecting segment b5, and a sixth connecting segment b6 connected in sequence, the fifth connecting segment b5 is distributed between the fourth connecting segment b4 and the sixth connecting segment b6 in the second direction Y, and the fourth connecting segment b4 and the sixth connecting segment b6 are also respectively connected to two third line segments 2022a distributed on both sides of the fourth line segment 2022b.

[0098] Among them, for the second line segment 2021b and the fourth line segment 2022b distributed between two adjacent first-type light-emitting devices 500a in the first direction X, the distance between the second connecting segment b2 in the second line segment 2021b and the fifth connecting segment b5 in the fourth line segment 2022b in the first direction X is greater than the distance between the first line segment 2021a and the third line segment 2022a distributed adjacently in the first direction X. Therefore, for the second line segment 2021b and the fourth line segment 2022b distributed between two adjacent first-type light-emitting devices 500a in the first direction X, the second line segment 2021b and the fourth line segment 2022b can be used to enclose a second hollow area U2, and the maximum distance of the second hollow area U2 in the first direction X, that is, the distance between the second connecting segment b2 in the second line segment 2021b and the fifth connecting segment b5 in the fourth line segment 2022b in the first direction X, is greater than the distance between the first line segment 2021a and the third line segment 2022a adjacently distributed in the first direction X.

[0099] The second hollow area U2 is provided on the first conductive layer 200, which can reduce the reflection of the metal layer on the external ambient light, thereby improving the transmittance of the display panel 000 to the external ambient light. The display panel 000 may also include: a plurality of light sensors (not shown in the figure), the plurality of light sensors may correspond to the plurality of second hollow areas U2, and the orthographic projection of the light sensor on the substrate 100 may be located within the orthographic projection of the second hollow area U2 on the substrate 100. In this case, the display panel 000 can identify the intensity of the external ambient light through the light sensor, so that the display brightness can be adjusted according to the light intensity of the environment in which the display panel 000 is located.

[0100] It should be noted that in some possible implementations, such as Figure 7 As shown, for the second line segment 2021b and the fourth line segment 2022b distributed between two adjacent first-type light-emitting devices 500a in the first direction X, the orthographic projection of the second line segment 2021b on the substrate 100 may overlap with the orthographic projection of the first electrode 5011 corresponding to one first-type light-emitting device 500a on the substrate 100; the orthographic projection of the fourth line segment 2022b on the substrate 100 may overlap with the orthographic projection of the first electrode 5011 corresponding to another first-type light-emitting device 500a on the substrate 100. Specifically, the orthographic projection of the second connecting segment b2 in the second line segment 2021b on the substrate 100 may be located within the orthographic projection of the first electrode 5011 corresponding to one first-type light-emitting device 500a on the substrate 100, and the orthographic projection of the fifth connecting segment b5 in the fourth line segment 2022b on the substrate 100 may be located within the orthographic projection of the first electrode 5011 corresponding to one first-type light-emitting device 500a on the substrate 100. In this way, the area of ​​the second hollow region U2 can be further increased, thereby further improving the transmittance of the display panel 000 to the external ambient light.

[0101] Please refer to Fig. 9 , Fig. 9 yes Figure 1 Another partial enlarged view of the display panel at C is shown. The at least two conductive lines 202 distributed between two adjacent columns of conductive blocks 201 may also include: a third conductive line 2023 and a fourth conductive line 2024, the third conductive line 2023 is distributed on a side of the first conductive line 2021 away from the second conductive line 2022, and the fourth conductive line 2024 is distributed on a side of the second conductive line 2022 away from the first conductive line 2021.

[0102] The third conductive line 2023 may include: a plurality of fifth line segments 2023 a that are separately arranged, and the extension directions of the plurality of fifth line segments 2023 a are all parallel to the second direction Y. The plurality of fifth line segments 2023 a are sequentially arranged along the second direction Y, and the plurality of fifth line segments 2023 a are electrically connected to a plurality of conductive blocks 201 in a most adjacent column of conductive blocks 201 .

[0103] The fourth conductive line 2024 may include: a plurality of sixth line segments 2024 a that are separately arranged, and the extension directions of the plurality of sixth line segments 2024 a are all parallel to the second direction Y. The plurality of sixth line segments 2024 a are sequentially arranged along the second direction Y, and the plurality of sixth line segments 2024 a are electrically connected to a plurality of conductive blocks 201 in a most adjacent column of conductive blocks 201 .

[0104] In this way, the resistance of the conductive block 201 can be further reduced, thereby ensuring that the voltage drop between different positions in the display area of ​​the display panel 000 is small, ensuring that the high-level power supply signal in the display area is relatively balanced, and improving the display effect of the display panel 000.

[0105] like Fig. 9 As shown, the orthographic projection of the fifth line segment 2023a on the substrate 100 may overlap with the orthographic projection of the second type light emitting device 500b on the substrate 100, and the orthographic projection of the sixth line segment 2024a on the substrate 100 may overlap with the orthographic projection of the second type light emitting device 500b on the substrate 100.

[0106] It should be noted that the widths of the multiple conductive lines 202 in the first direction X can be equal, and the distance between the fifth line segment 2023a and the first line segment 2021a of the first conductive line 2021 can be equal to the distance between the first line segment 2021a and the third line segment 2022a, and the distance between the sixth line segment 2024a and the third line segment 2022a can be equal to the distance between the first line segment 2021a and the third line segment 2022a.

[0107] In this case, please refer to Figure 6 The fifth line segment 2023a and the sixth line segment 2024a can raise the areas on both sides of the first line segment 2021a and the third line segment 2022a to ensure that the height difference of the first sub-flat layer 301 at the corresponding position away from the substrate 100 is not too large, thereby ensuring that even if the second sub-flat layer 302 is thinner, the flatness of the second sub-flat layer 302 away from the substrate 100 can be better, thereby improving the flatness of the anode of the second type light-emitting device 500b and the front light extraction efficiency of the second type light-emitting device 500b, while saving costs, and the overall thickness of the display panel 000 is not too large.

[0108] Please refer to Fig.10 , Fig.10The display panel provided in the embodiment of the present application is Figure 2 Another cross-sectional schematic diagram at AA' in FIG. The display panel 000 may further include: a second flat layer 700, the second flat layer 700 is located between the first flat layer 300 and the pixel definition layer 400, the second flat layer 700 has a plurality of second pixel openings K2, the plurality of second pixel openings K2 are correspondingly connected to the plurality of first pixel openings K1, and the orthographic projection of the first pixel openings K1 on the substrate 100 is located within the orthographic projection of the second pixel openings K2 on the substrate 100.

[0109] At least part of the light emitting device 500 is also located in the second pixel opening K2. Fig.10 As shown, the first electrode 5011 corresponding to the light emitting device 500 may correspond to the second pixel opening K2, a portion of the first electrode 5011 may be located on the side of the second flat layer 700 away from the substrate 100, and another portion of the first electrode 5011 is located in the corresponding second pixel opening K2 and covers the side wall of the corresponding second pixel opening K2. For example, please refer to Fig.11 , Fig.11 yes Fig.10 The first electrode 5011 may include: a first portion 5011a located on the side of the second flat layer 700 facing away from the substrate 100, a second portion 5011b covering the side wall of the corresponding second pixel opening K2, and a third portion 5011c, the third portion 5011c is located in the corresponding second pixel opening K2 and contacts the side of the first flat layer 300 facing away from the substrate 100.

[0110] The first portion 5011a of the first electrode 5011 is electrically connected to the plurality of transfer electrodes Z; the third portion 5011c of the first electrode 5011 that is located in the corresponding first pixel opening K1 and in contact with the light-emitting layer 502 is the anode in the corresponding light-emitting device 500 .

[0111] The second flat layer 700 may have a plurality of third via holes 700a, and the plurality of third via holes 700a correspond to the first portions 5011a of the plurality of first electrodes 5011, and the plurality of third via holes 700a are in communication with the plurality of second via holes 302a. The first portion 5011a of the first electrode 5011 is electrically connected to the corresponding transfer electrode Z through the corresponding third via hole 700a, the second via hole 302a, and the first via hole 301a. Since the first portion 5011a, the second portion 5011b, and the third portion 5011c of the first electrode 5011 are electrically connected in sequence, the light emitting device 500 may be electrically connected to the corresponding transfer electrode Z through the corresponding first electrode 5011, thereby realizing electrical connection between the light emitting device 500 and the corresponding pixel driving circuit P, and the pixel driving circuit P is used to drive the corresponding light emitting device 500 to emit light.

[0112] It should be noted that the third via hole 700a may be in various shapes. For example, the third via hole 700a may be a circular via hole. In the embodiment of the present application, when the third via hole 700a is a circular via hole, the diameter of the third via hole 700a may range from 4 micrometers to 6.5 micrometers.

[0113] In the actual process, the opening of the third via 700a on the side facing the substrate 100 is within the fifth orthographic projection on the substrate 100, and the opening of the third via 700a on the side facing away from the substrate 100 is within the sixth orthographic projection on the substrate 100, and the outer boundary of the fifth orthographic projection does not coincide with the outer boundary of the sixth orthographic projection. That is, in the direction perpendicular to the substrate 100, the opening size of the third via 700a gradually decreases in the direction approaching the substrate 100. Exemplarily, in the case where the third via 700a is a circular via, the diameter of the opening of the third via 700a on the side facing the substrate 100 may range from 4 microns to 6.5 microns, and the diameter of the opening of the third via 700a on the side facing away from the substrate 100 may also range from 4 microns to 6.5 microns, and the diameter of the opening of the third via 700a on the side facing away from the substrate 100 is smaller than the diameter of the opening of the third via 700a on the side facing away from the substrate 100.

[0114] It should also be noted that after forming the second sub-planar layer 302, since the second sub-planar layer 302 has a plurality of second via holes 302a, in the process of forming the second planar layer 700, the organic material will also be filled into the second via holes 302a. To ensure that no organic material remains in the second via holes 302a, the fourth orthographic projection of the opening of the second via hole 302a on the side away from the substrate 100 on the substrate 100 can be located within the fifth orthographic projection of the opening of the third via hole 700a on the side facing the substrate 100 on the substrate 100, and the outer boundary of the fourth orthographic projection does not overlap with the outer boundary of the fifth orthographic projection. That is, the opening size of the second via hole 302a on the side away from the substrate 100 can be smaller than the opening size of the third via hole 700a on the side facing the substrate 100.

[0115] For example, Fig.11As shown, in the first direction X, a distance d2 between an opening edge of the second via 302a facing away from the substrate 100 and an opening edge of the third via 700a facing the substrate 100 ranges from 0.4 microns to 0.75 microns. Here, an opening edge of the second via 302a facing away from the substrate 100 and an opening edge of the third via 700a facing the substrate 100 are located on the same side of the second via 302a and the third via 700a. In this case, since the opening size of the second via 302a facing away from the substrate 100 is smaller than the opening size of the third via 700a facing the substrate 100, the organic material in the second via 302a can be overexposed during the formation of the third via 700a to ensure that no organic material remains in the second via 302a, and the second via 302a can be connected to the corresponding third via 700a, thereby ensuring that the light-emitting device 500 can be effectively electrically connected to the corresponding transfer electrode Z through the corresponding third via 700a, the second via 302a and the first via 301a, thereby improving the yield of the display panel 000.

[0116] The second portion 5011b of the first electrode 5011 covers the side wall of the corresponding second pixel opening K2. The angle between the side wall of the second pixel opening K2 and the side of the second pixel opening K2 facing the substrate 100 may be an obtuse angle. In this case, the angle between the second portion 5011b of the first electrode 5011 and the third portion 5011c of the first electrode 5011 may also be an obtuse angle. Since the first electrode 5011 may be a reflective material, the anode of the light-emitting device 500 may reflect part of the light onto the side wall of the first pixel opening K1. In order to improve the light utilization rate, the pixel definition layer 400 may be a light-transmitting material. In this case, the second portion 5011b of the first electrode 5011 may reflect the part of the light again so that it can be emitted from the first pixel opening K1, thereby improving the light utilization rate, improving the display brightness of the display panel 000, and reducing the power consumption of the display panel 000.

[0117] It should be noted that the thickness of the second planar layer 700 in the direction perpendicular to the substrate 100 may range from 2 micrometers to 3 micrometers. In this case, the area of ​​the second portion 5011b of the first electrode 5011 can be ensured to be larger, and the effect of improving light utilization efficiency is better.

[0118] Please refer to Fig.12 , Fig.12 The display panel provided in the embodiment of the present application is Figure 2 Another cross-sectional schematic diagram at AA' in FIG. 000 . The pixel driving circuit P electrically connected to the light emitting device 500 in the display panel 000 may include: at least two transistors and at least one storage capacitor.

[0119] Among them, the storage capacitor may include: a first capacitor electrode C1 and a second capacitor electrode C2 arranged opposite to each other. The transistor may include: an active layer Act, a gate G, a source S and a drain D. The active layer Act may be insulated from the gate G, and the source S and the drain D may be overlapped with the active layer Act. The source S may be electrically connected to the data line, and the drain D may be electrically connected to the anode of the light-emitting device 500 through the switching electrode Z. Here, the switching electrode Z may be a single-layer structure or a double-layer structure. For example, in the case where the switching electrode Z is a double-layer structure, the switching electrode may include: a first sub-switching electrode and a second sub-switching electrode arranged in a stacked manner. This application does not impose any restrictions on this.

[0120] In the embodiment of the present application, the display panel 000 may further include: a buffer layer 800 located on one side of the substrate 100, an active layer pattern, a first gate insulating layer 900, a second conductive layer, a second gate insulating layer 1000, a third conductive layer, an interlayer dielectric layer 1100, a fourth conductive layer and a passivation layer 1200.

[0121] Here, the active layer pattern may include an active layer Act in a transistor.

[0122] The second conductive layer may include: a gate G in the transistor and a first capacitor electrode C1 in the storage capacitor.

[0123] The third conductive layer may include: a second capacitor electrode C2 in the storage capacitor.

[0124] The fourth conductive layer may include: a source S and a drain D in the transistor.

[0125] In summary, in the embodiment of the present application, the orthographic projection of the second type of light emitting device on the substrate can overlap with the orthographic projection of the plurality of conductive lines in the second conductive layer on the substrate. Exemplarily, the orthographic projection of the second type of light emitting device on the substrate can overlap with the orthographic projection of the first line segment in the first conductive line on the substrate, the orthographic projection of the third line segment in the second conductive line on the substrate, the orthographic projection of the fifth line segment in the third conductive line on the substrate, and the orthographic projection of the sixth line segment in the fourth conductive line on the substrate. Since the first flat layer at least includes: a first sub-flat layer and a second sub-flat layer stacked, the first sub-flat layer is closer to the substrate than the second sub-flat layer, and the flatness of the second sub-flat layer on the side away from the substrate is higher than the flatness of the first sub-flat layer on the side away from the substrate. In this case, the flatness of the first flat layer on the side away from the substrate is better, so that the flatness of the first electrode layer formed on the side away from the substrate of the first flat layer can be ensured to be better, effectively improving the flatness of the anode of the second type of light emitting device, improving the front light extraction efficiency of the second type of light emitting device, and improving the display effect of the display panel.

[0126] The present application also provides a display device, which includes: a power supply component, and a display panel 000 electrically connected to the power supply component. The display panel 000 may include any of the display panels 000 given above. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, an advertising machine, a display screen, a digital photo frame, etc.

[0127] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0128] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0129] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A substrate, a pixel driving circuit, a first conductive layer, a first planar layer, a pixel definition layer and a light emitting device; There are multiple pixel driving circuits, and the multiple pixel driving circuits are all located on the same side of the substrate; The first conductive layer is located on a side of the pixel driving circuit away from the substrate, and the first conductive layer includes: a plurality of switching electrodes electrically connected to the plurality of pixel driving circuits; The first flat layer is located on a side of the first conductive layer away from the substrate, the first flat layer at least comprising: a first sub-flat layer and a second sub-flat layer stacked, the first sub-flat layer is closer to the substrate than the second sub-flat layer, and the flatness of the second sub-flat layer on a side away from the substrate is higher than the flatness of the first sub-flat layer on a side away from the substrate; The pixel definition layer is located on a side of the first planar layer away from the substrate, and the pixel definition layer has a plurality of first pixel openings; There are multiple light-emitting devices, and the multiple light-emitting devices correspond to the multiple first pixel openings and the multiple switching electrodes; at least part of the light-emitting devices is located in the corresponding first pixel openings and is electrically connected to the corresponding switching electrodes; The orthographic projection of the light-emitting device on the substrate overlaps with the orthographic projection of the first conductive layer on the substrate.

2. The display panel according to claim 1, characterized in that: The first sub-planar layer has a plurality of first via holes, the second sub-planar layer has a plurality of second via holes, and the plurality of first via holes are connected to the plurality of second via holes correspondingly; The plurality of first via holes correspond to the plurality of switching electrodes, the plurality of second via holes correspond to the plurality of light-emitting devices, and the light-emitting devices are electrically connected to the corresponding switching electrodes through the corresponding second via holes and the first via holes.

3. The display panel according to claim 2, characterized in that: A first orthographic projection of an opening of the first via hole facing away from the substrate on the substrate is located within a second orthographic projection of an opening of the second via hole facing the substrate on the substrate; and an outer boundary of the first orthographic projection does not overlap with an outer boundary of the second orthographic projection.

4. The display panel according to claim 1, characterized in that: The thickness of the first sub-planarizing layer and the second sub-planarizing layer in a direction perpendicular to the substrate ranges from 1 micrometer to 1.5 micrometers.

5. The display panel according to any one of claims 1 to 4, characterized in that: The plurality of light emitting devices include: a plurality of first-type light emitting devices and a plurality of second-type light emitting devices; The plurality of first-type light-emitting devices and the plurality of second-type light-emitting devices are arranged in a plurality of columns along the first direction and in a plurality of rows along the second direction; The first conductive layer further comprises: a plurality of conductive blocks and a plurality of conductive lines; the overall extension direction of the conductive lines is parallel to the second direction; Among them, the multiple conductive blocks correspond to multiple first-type light-emitting devices, and the orthographic projection of the first-type light-emitting devices on the substrate is located within the orthographic projection of the corresponding conductive blocks on the substrate; the orthographic projection of the second-type light-emitting device on the substrate overlaps with the orthographic projection of at least one of the conductive lines on the substrate.

6. The display panel according to claim 5, characterized in that: The first conductive layer further includes: a connecting wire, two ends of which are electrically connected to two adjacent conductive blocks in the second direction respectively.

7. The display panel according to claim 6, characterized in that: In the second direction, two connecting wires are arranged between two adjacent conductive blocks, and the two connecting wires are arranged opposite to each other in the first direction; The two adjacent conductive blocks in the second direction and the two connecting lines between the two adjacent conductive blocks are used to enclose a first hollow area, and at least one switching electrode is distributed in the first hollow area.

8. The display panel according to claim 5, characterized in that: At least two conductive lines are distributed between two adjacent columns of conductive blocks; The orthographic projection of the second type of light emitting device on the substrate overlaps with the orthographic projection of at least two conductive lines distributed between two adjacent columns of the conductive blocks on the substrate.

9. The display panel according to claim 8, characterized in that: The at least two conductive lines distributed between two adjacent columns of the conductive blocks include: a first conductive line and a second conductive line; the overall extension direction of the first conductive line and the second conductive line is parallel to the second direction; The first conductive line includes: a plurality of first line segments and a plurality of second line segments; the plurality of first line segments and the plurality of second line segments are alternately connected in the second direction; the orthographic projection of the first line segments on the substrate overlaps with the orthographic projection of the second type of light emitting device on the substrate, and the second line segments are distributed between two adjacent first type of light emitting devices in the first direction; The second conductive line includes: a plurality of third line segments and a plurality of fourth line segments; the plurality of third line segments and the plurality of fourth line segments are alternately connected in the second direction; the orthographic projection of the third line segments on the substrate overlaps with the orthographic projection of the second type of light-emitting device on the substrate, and the fourth line segments are distributed between two adjacent first type of light-emitting devices in the first direction.

10. The display panel according to claim 9, characterized in that: For the second line segment and the fourth line segment distributed between two adjacent first-type light-emitting devices in the first direction, the second line segment and the fourth line segment are used to enclose a second hollow area; The maximum distance of the second hollow area in the first direction is greater than the distance between the first line segment and the third line segment adjacently distributed in the first direction.

11. The display panel according to claim 10, characterized in that: The display panel further comprises: a plurality of first electrodes which are separately arranged; the plurality of first electrodes are electrically connected to the plurality of switching electrodes; the plurality of first electrodes correspond to the plurality of light emitting devices, and the anodes in the light emitting devices are parts of the corresponding first electrodes; The orthographic projection of the first electrode corresponding to the second type of light-emitting device on the substrate overlaps with the orthographic projections of the first line segment and the third line segment adjacently distributed in the first direction on the substrate; For the second line segment and the fourth line segment distributed between two adjacent first-type light-emitting devices in the first direction, the orthographic projection of the second line segment on the substrate overlaps with the orthographic projection of the first electrode corresponding to one of the first-type light-emitting devices on the substrate, and the orthographic projection of the fourth line segment on the substrate overlaps with the orthographic projection of the first electrode corresponding to another first-type light-emitting device on the substrate.

12. The display panel according to claim 9, characterized in that: The at least two conductive lines distributed between two adjacent columns of the conductive blocks include: a third conductive line and a fourth conductive line; the third conductive line is distributed on a side of the first conductive line away from the second conductive line, and the fourth conductive line is distributed on a side of the second conductive line away from the first conductive line; The third conductive line comprises: a plurality of fifth line segments which are separately arranged, the extension directions of the plurality of fifth line segments are all parallel to the second direction, the plurality of fifth line segments are sequentially arranged along the second direction, and the plurality of fifth line segments are electrically connected to a plurality of the conductive blocks in a column of the conductive blocks; the orthographic projection of the fifth line segments on the substrate overlaps with the orthographic projection of the second type of light emitting device on the substrate; The fourth conductive line includes: a plurality of sixth line segments that are separately arranged, the extension directions of the plurality of sixth line segments are all parallel to the second direction, the plurality of sixth line segments are arranged in sequence along the second direction, and the plurality of sixth line segments are electrically connected to a plurality of the conductive blocks in a column of the conductive blocks; the orthographic projection of the sixth line segment on the substrate overlaps with the orthographic projection of the second type of light-emitting device on the substrate.

13. The display panel according to any one of claims 1-4 and 6-12, characterized in that: The display panel further includes: a second flat layer, the second flat layer is located between the first flat layer and the pixel definition layer, the second flat layer has a plurality of second pixel openings, and the plurality of second pixel openings are correspondingly connected to the plurality of first pixel openings; Wherein, at least part of the light-emitting device is also located in the second pixel opening.

14. The display panel according to claim 13, characterized in that: The display panel further comprises: a plurality of first electrodes which are separately arranged; the plurality of first electrodes are electrically connected to the plurality of switching electrodes; the plurality of first electrodes correspond to the plurality of light emitting devices, and the anodes in the light emitting devices are parts of the corresponding first electrodes; The second pixel opening corresponds to the multiple first electrodes, a portion of the first electrodes is located on a side of the second flat layer away from the substrate, and another portion of the first electrode is located in the corresponding second pixel opening and covers the side wall of the corresponding second pixel opening.

15. A display device, characterized in that: include: A power supply component, and a display panel connected to the power supply component, wherein the display panel is the display panel according to any one of claims 1 to 14.

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