Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a substrate, a pixel definition structure and a light emitting unit, the pixel definition structure is arranged on one side of the substrate, and at least part of the pixel definition structure comprises a plurality of pixel openings; the light-emitting units are at least partially located in the pixel openings; the surface of the side, away from the substrate, of the pixel defining structure comprises a first side wall part, a first concave part and a first convex part which are connected in sequence, the first side wall part is used for forming a pixel opening in a surrounding mode, and the distance between the first concave part and the substrate is smaller than the maximum distance between the first side wall part and the substrate; the maximum distance between the first protruding part and the substrate is larger than the maximum distance between the first side wall part and the substrate. According to the display panel provided by the invention, the light rays which are originally diffused to the edge and lost can be converged, and more light rays are guided to be emitted to the front side, so that the edge light loss is reduced, the luminous efficiency is improved, and the power consumption is reduced.

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] OLED (Organic Light-Emitting Diode) is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. At present, display screens based on AMOLED (Active-matrix organic Light-Emitting Diode) have been commercialized in the fields of smart phones, watches and laptops.

[0003] However, existing display panels have problems of low luminous efficiency and high power consumption. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display panel and a display device, which are helpful to improve the luminous efficiency and reduce the power consumption.

[0005] Based on the above purpose, the present application provides a display panel, including:

[0006] substrate;

[0007] A pixel definition structure, the pixel definition structure is disposed on one side of the substrate, and the pixel definition structure includes a plurality of pixel openings;

[0008] a light emitting unit, wherein the light emitting unit is at least partially located in the pixel opening;

[0009] Among them, at least part of the surface of the pixel definition structure away from the substrate side includes a first side wall portion, a first recessed portion and a first raised portion connected in sequence, the first side wall portion is used to enclose the pixel opening, the distance between the first recessed portion and the substrate is smaller than the maximum distance between the first side wall portion and the substrate, and the maximum distance between the first raised portion and the substrate is larger than the maximum distance between the first side wall portion and the substrate.

[0010] In one embodiment, the pixel definition structure includes a pixel definition layer, and the first sidewall portion, the first recessed portion, and the first protruding portion are located on a surface of the pixel definition layer away from the substrate;

[0011] Preferably, the first recessed portion comprises an annular groove arranged around the first raised portion.

[0012] In one embodiment, the display panel includes:

[0013] A planarization layer, the planarization layer is disposed on a side of the pixel definition structure close to the substrate;

[0014] Preferably, the surface of the planarization layer on the side away from the substrate comprises a plane portion, a second protruding portion, a second concave portion and a third protruding portion connected in sequence, the maximum distance between the second protruding portion and the substrate is greater than the distance between the plane portion and the substrate, the maximum distance between the third protruding portion and the substrate is greater than the maximum distance between the second protruding portion and the substrate, and the minimum distance between the second concave portion and the substrate is less than the maximum distance between the first protruding portion and the substrate; wherein the orthographic projection of the third protruding portion on the substrate at least partially overlaps with the orthographic projection of the first protruding portion on the substrate;

[0015] Preferably, the light emitting unit is arranged on the plane portion;

[0016] Preferably, an orthographic projection of the second recessed portion on the substrate at least partially overlaps with an orthographic projection of the first recessed portion on the substrate.

[0017] In one embodiment, the pixel definition structure includes a pixel definition layer and a support column, the support column is arranged on a side of the pixel definition layer away from the substrate, and the orthographic projection of the support column on the substrate is located within the orthographic projection of the pixel definition layer on the substrate; the first sidewall portion is located on a surface of the pixel definition layer away from the substrate, and the first protrusion is located on a surface of the support column away from the substrate;

[0018] Preferably, the first recessed portion comprises an annular gap surrounding the support column.

[0019] In one embodiment, the pixel definition structure includes a first pixel definition structure and a second pixel definition structure;

[0020] The first pixel definition structure includes a pixel definition layer, and the first sidewall portion, the first recessed portion, and the first protruding portion of the first pixel definition structure are located on a surface of the pixel definition layer away from the substrate;

[0021] The second pixel definition structure includes a pixel definition layer and a support column, wherein the support column is arranged on a side of the pixel definition layer away from the substrate, and the orthographic projection of the support column on the substrate is located within the orthographic projection of the pixel definition layer on the substrate; the first sidewall portion of the second pixel definition structure is located on a surface of the pixel definition layer away from the substrate, and the first protrusion of the second pixel definition structure is located on a surface of the support column away from the substrate.

[0022] In one embodiment, the light-emitting unit includes a first light-emitting unit and a second light-emitting unit having different colors of emitted light;

[0023] The light emitting unit includes a driving device, the driving device includes a semiconductor layer, the semiconductor layer includes a source region, a drain region, and a channel region located between the source region and the drain region;

[0024] In a direction parallel to the substrate, in the semiconductor layer corresponding to the first light-emitting unit, the source region, the channel region and the drain region are arranged along the same straight line;

[0025] Preferably, the light-emitting unit further comprises a third light-emitting unit whose emitted light color is different from that of the first light-emitting unit and the second light-emitting unit;

[0026] Preferably, the sum of the lengths of the source region, the channel region and the drain region in the semiconductor layer corresponding to the third light-emitting unit is smaller than the sum of the lengths of the source region, the channel region and the drain region in the semiconductor layer corresponding to the second light-emitting unit.

[0027] In one embodiment, the light emitting unit includes a first electrode, the first electrode is disposed on a side of the pixel definition structure close to the substrate, and an orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the pixel definition structure on the substrate;

[0028] Preferably, the pixel definition structure at least covers an edge of the first electrode;

[0029] Preferably, the pixel definition structure covers the gap between the first electrodes of adjacent light-emitting units;

[0030] Preferably, the light-emitting unit further comprises a light-emitting layer and a second electrode which are sequentially stacked in a direction away from the first electrode;

[0031] Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

[0032] Based on the same inventive concept, the present application also provides a display panel, including:

[0033] substrate;

[0034] A pixel definition structure, the pixel definition structure is arranged on one side of the substrate, the pixel definition structure comprises a plurality of pixel openings; a fourth protrusion is arranged on a surface of the pixel definition structure away from the substrate;

[0035] a light emitting unit, wherein the light emitting unit is at least partially located in the pixel opening;

[0036] A planarization layer is arranged on a side of the pixel definition structure close to the substrate; a fifth protrusion is arranged on a surface of the planarization layer away from the substrate, and an orthographic projection of the fifth protrusion on the substrate at least partially overlaps with an orthographic projection of the fourth protrusion on the substrate.

[0037] In one embodiment, the light-emitting unit includes a first electrode, the first electrode is disposed on a side of the planarization layer away from the substrate, and the pixel definition structure at least covers an edge of the first electrode;

[0038] Preferably, the orthographic projection of the first electrode on the substrate at least partially overlaps with the orthographic projection of the fourth protrusion on the substrate;

[0039] Preferably, an orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the fifth protrusion on the substrate.

[0040] Based on the same inventive concept, the present application also provides a display device, which includes the display panel described above.

[0041] The display panel provided in the present application sets the surface of the side of the pixel definition structure away from the substrate into a hill shape. When the light in the pixel opening encounters the protruding structure, reflection will occur, which can gather the light that was originally lost by diverging to the edge and guide more light to be emitted to the front, thereby reducing edge light loss, thereby improving luminous efficiency and reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a schematic diagram of a related display panel;

[0044] Figure 2 is a schematic diagram of a film layer structure of a related display panel;

[0045] Figure 3 Schematic diagram of a display panel in some embodiments of the present application;

[0046] Figure 4 Schematic diagram of the film structure of the display panel in some embodiments of the present application;

[0047] Figure 5A schematic diagram of a pixel definition structure in some embodiments of the present application;

[0048] Figure 6 Schematic diagram of the film structure of the display panel in other embodiments of the present application;

[0049] Figure 7 Schematic diagram of the film structure of the display panel in other embodiments of the present application;

[0050] Figure 8 Schematic diagram of the film structure of the display panel in other embodiments of the present application;

[0051] Fig. 9 Schematic diagram of the planar structure of the semiconductor layer of the display panel in other embodiments of the present application;

[0052] Fig.10 Schematic diagram of the film layer structure of the display panel in some other embodiments of the present application.

[0053] Marking description: 100, display panel;

[0054] 1. Substrate; 2. Pixel definition structure; 20. Pixel opening; 21. Pixel definition layer; 201. First side wall portion; 202. First recessed portion; 203. First protruding portion; 204. Fourth protruding portion; 22. Support column; 3. Light-emitting unit; 31. First electrode; 32. Light-emitting layer; 33. Second electrode; 4. Planarization layer; 401. Planar portion; 402. Second protruding portion; 403. Second recessed portion; 404. Third protruding portion; 405. Fifth protruding portion; 5. Semiconductor layer; 501. Source region; 502. Channel region; 503. Drain region. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0056] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0057] With the continuous development of display technology, people's demand for product power consumption is also increasing, which requires display products to reduce power consumption in all aspects.

[0058] Reference Figure 1 , Figure 2 As shown, a related display panel 100 includes a substrate 1, a pixel defining layer 21 and a light emitting unit 3. The pixel defining layer 21 is disposed on one side of the substrate 1, the pixel defining layer 21 includes a plurality of pixel openings 20, and the light emitting unit 3 includes a first electrode 31, and a portion of the first electrode 31 is exposed in the pixel opening 20.

[0059] After long-term research, the inventors found that in the related art, the surface of the pixel definition layer 21 away from the substrate 1 is relatively flat. During the light-emitting process, the light emitted by the light-emitting unit 3 propagates in all directions, but is limited by the structural design of the pixel definition layer 21 located at the periphery of the pixel opening 20, causing the light at the edge to be more divergent, resulting in edge light loss, causing part of the light to be unable to be emitted normally, and ultimately reducing the overall light-emitting efficiency.

[0060] Based on this, the present application provides a display panel solution to solve the above problems.

[0061] Reference Figure 3 , Figure 4 , Figure 5 As shown, a display panel 100 provided in some embodiments of the present application includes a substrate 1, a pixel definition structure 2 and a light-emitting unit 3. The pixel definition structure 2 is disposed on one side of the substrate 1, and the pixel definition structure 2 includes a plurality of pixel openings 20, and at least part of the film layer of the light-emitting unit 3 is located in the pixel opening 20.

[0062] Among them, the surface of at least part of the pixel definition structure 2 away from the substrate 1 includes a first side wall portion 201, a first recessed portion 202 and a first raised portion 203 connected in sequence, the first side wall portion 201 is used to enclose a pixel opening, the distance between the first recessed portion 202 and the substrate 1 is smaller than the maximum distance between the first side wall portion 201 and the substrate 1, and the maximum distance between the first raised portion 203 and the substrate 1 is larger than the maximum distance between the first side wall portion 201 and the substrate 1.

[0063] Specifically, the surface of the pixel definition structure 2 away from the substrate 1 is in the shape of a hill, with the side away from the substrate 1 as the upper side, and the first recessed portion 202 is recessed downward to form a slit. The first raised portion 203 is raised upward, the first recessed portion 202 is lower than the highest point of the first side wall portion 201, and the highest point of the first raised portion 203 is higher than the highest point of the first side wall portion 201, thereby forming a hill shape with concave and convex portions. Under the premise that the height of the pixel definition structure 2 is fixed, the surface with the first recessed portion 202 and the first raised portion 203 can change the propagation path of light compared to a relatively flat surface, and has a better effect of converging light.

[0064] The display panel 100 provided in this embodiment sets the surface of the pixel definition structure 2 away from the substrate 1 to a hill shape. When the light in the pixel opening 20 encounters the first recessed portion 202 and the first raised portion 203, reflection will occur, which can converge the light that was originally lost by diverging to the edge and guide more light to be emitted to the front, thereby reducing edge light loss, thereby improving luminous efficiency and reducing power consumption.

[0065] For example, the shape of the hill can be optimized by controlling the width, depth, or shape of the first recessed portion 202. The side shape of the pixel definition structure 2 facing the pixel opening 20 can also be controlled. For example, the side of the first protruding portion 203 can be optimized to be a curved surface with a certain angle or curvature to guide light to propagate in a specific direction, thereby enhancing the front light emitting effect of the light emitting unit 3 and improving display brightness and contrast.

[0066] Reference Figure 6 As shown, in some embodiments, the pixel definition structure 2 includes a pixel defining layer 21 , and the first sidewall portion 201 , the first recessed portion 202 and the first protruding portion 203 are located on a surface of the pixel defining layer 21 away from the substrate 1 .

[0067] The first recessed portion 202 includes an annular groove arranged around the first raised portion 203. The first recessed portion 202 is specifically arranged as an annular slit.

[0068] Specifically, the first recessed portion 202 is disposed on the outer periphery of the first protruding portion 203 , and the first sidewall portion 201 is disposed on the outer periphery of the first recessed portion 202 .

[0069] Specifically, the pixel defining layer 21 is patterned to form a slit-shaped first recessed portion 202 to gather light from the light emitting unit 3, thereby improving light emitting efficiency.

[0070] Continue to refer to Figure 6 As shown, in some embodiments, the display panel 100 includes a planarization layer 4 , and the planarization layer 4 is disposed on a side of the pixel definition structure 2 close to the substrate 1 .

[0071] Optionally, the surface of the planarization layer 4 on the side away from the substrate 1 includes a plane portion 401, a second protruding portion 402, a second recessed portion 403, and a third protruding portion 404 connected in sequence, the maximum distance between the second protruding portion 402 and the substrate 1 is greater than the distance between the plane portion 401 and the substrate 1, the maximum distance between the third protruding portion 404 and the substrate 1 is greater than the maximum distance between the second protruding portion 402 and the substrate 1, and the minimum distance between the second recessed portion 403 and the substrate 1 is less than the maximum distance between the first protruding portion 203 and the substrate 1. The orthographic projection of the third protruding portion 404 on the substrate 1 at least partially overlaps with the orthographic projection of the first protruding portion 203 on the substrate 1.

[0072] Optionally, the light emitting unit 3 is disposed on the plane portion 401 .

[0073] Optionally, an orthographic projection of the second recessed portion 403 on the substrate 1 at least partially overlaps with an orthographic projection of the first recessed portion 202 on the substrate 1 .

[0074] Specifically, the planarization film layer can be patterned using a halftone mask (HTM) technology to form a planarization layer 4 of different thicknesses, so that the surface of the planarization layer 4 away from the substrate 1 is hill-shaped, the second concave portion 403 is downwardly concave, the second convex portion 402 and the third convex portion 404 are upwardly convex, the second concave portion 403 is lower than the highest point of the second convex portion 402, the highest point of the third convex portion 404 is higher, and the highest point of the first convex portion 203 is higher than the highest point of the second convex portion 402, thereby forming a hill shape with concave and convex alternation. On the basis that the top surface of the planarization layer 4 is hill-shaped, the pixel definition structure 2 is directly laid on the planarization layer 4, so that the top surface of the pixel definition structure 2 can be formed into a hill shape.

[0075] Among them, the height of the pixel definition structure 2 can be increased by the planarization layer 4, so that when the light passes through the elevated pixel definition structure 2 during propagation, its angle changes, making it easier to converge, reducing the amount of light diffused to the edge, thereby reducing edge light loss. At the same time, the planarization layer 4 is patterned to form a hill shape, further enhancing the convergence of light.

[0076] Reference Figure 7As shown, in other embodiments, the pixel definition structure 2 includes a pixel definition layer 21 and a support column 22, the support column 22 is arranged on the side of the pixel definition layer 21 away from the substrate 1, and the orthographic projection of the support column 22 on the substrate 1 is located within the orthographic projection of the pixel definition layer 21 on the substrate 1. The first sidewall portion 201 is located on the surface of the pixel definition layer 21 away from the substrate 1, and the first protrusion 203 is located on the surface of the support column 22 away from the substrate 1. The pixel definition layer 21 is patterned to form a depression, the support column 22 is prepared at the depression position, and the first protrusion 203 is formed, and the first depression 202 is formed at the edge of the support column 22. The support column 22 can also be used to support the mask plate during the evaporation process.

[0077] Preferably, the first recessed portion 202 includes an annular gap disposed around the support column 22 .

[0078] Specifically, in OLED evaporation technology, a mask plate is used to evaporate organic light-emitting components on a substrate. In order to maintain a safe distance between the substrate and the mask plate, a support column (SPC) is provided to support the mask plate. At the same time, light is reflected when passing through the support column. By reasonably designing the shape, size and position of the support column, the propagation path of the light can be fine-tuned, the edge light loss can be reduced, and the light extraction efficiency can be improved. At the same time, the pixel opening 20 is formed by the support column 22 and the pixel defining layer 21, and the size and shape of the effective light-emitting area of ​​each light-emitting unit can be determined.

[0079] Reference Figure 3 As shown, in some embodiments, the pixel definition structure 2 includes a first pixel definition structure (such as Figure 6 ) and a second pixel definition structure (such as Figure 7 The first pixel definition structure includes a pixel definition layer 21 . In the first pixel definition structure, a first sidewall portion 201 , a first recessed portion 202 and a first protruding portion 203 are located on a surface of the pixel definition layer 21 away from the substrate 1 .

[0080] The second pixel definition structure includes a pixel definition layer 21 and a support column 22. The support column 22 is arranged on the side of the pixel definition layer 21 away from the substrate 1, and the orthographic projection of the support column 22 on the substrate 1 is located within the orthographic projection of the pixel definition layer 21 on the substrate 1. In the second pixel definition structure, the first side wall portion 201 is located on the surface of the pixel definition layer 21 away from the substrate 1, and the first protrusion 203 is located on the surface of the support column 22 away from the substrate 1. The pixel definition layer 21 is patterned to form a depression, and the support column 22 is prepared at the depression position, and the first protrusion 203 is formed. At the same time, the first depression 202 is formed at the edge of the support column 22. The support column 22 can also be used to support the mask plate during the evaporation process.

[0081] Among them, some areas of the display panel 100 have support columns 22, while some areas do not have support columns 22. In the areas without support columns 22, a hill shape is formed on the surface of the pixel defining layer 21; in the areas with support columns 22, the surface of the pixel defining layer 21 and the support columns 22 can be formed into a hill shape together.

[0082] Reference Figure 3 , Figure 8 , Fig. 9 As shown, in some embodiments, the light emitting unit 3 includes a first light emitting unit B and a second light emitting unit G with different emitted light colors.

[0083] Further, the light emitting unit 3 includes a driving device, the driving device includes a semiconductor layer 5, and the semiconductor layer 5 includes a source region 501, a drain region 503, and a channel region 502 located between the source region 501 and the drain region 503. Exemplarily, the semiconductor layer 5 is an active layer, including the channel region 502 formed of P-Si (P silicon).

[0084] In a direction parallel to the substrate 1 , in the semiconductor layer 5 corresponding to the first light emitting unit B located in the first type opening, the source region 501 , the channel region 502 and the drain region 503 are arranged along the same straight line.

[0085] Specifically, in a plane parallel to the substrate 1, the source region 501, the channel region 502 and the drain region 503 corresponding to the light emitting unit 3 in the related art are usually arranged along a curved line, and the extended size is relatively large. In this embodiment, the source region 501, the channel region 502 and the drain region 503 are arranged along the same straight line, so that the size of the corresponding driving device is shortened, and the current of the corresponding first light emitting unit B in the driving circuit can be increased, the light emitting efficiency is improved, and the power consumption is reduced.

[0086] Preferably, the light emitting unit 3 further includes a third light emitting unit G having an emitting light color different from that of the first light emitting unit B and the second light emitting unit G. In a direction parallel to the substrate 1, the sum of the lengths of the source region 501, the channel region 502, and the drain region 503 in the semiconductor layer 5 corresponding to the third light emitting unit R is smaller than the sum of the lengths of the source region 501, the channel region 502, and the drain region 503 in the semiconductor layer 5 corresponding to the second light emitting unit G.

[0087] In this embodiment, the first light-emitting unit B, the second light-emitting unit G and the third light-emitting unit G emit blue, green and red light, respectively. Among them, shortening the size of the driving device of the first light-emitting unit B or the third light-emitting unit R can increase the current of the first light-emitting unit B or the third light-emitting unit R, improve the overall luminous efficiency of the light-emitting unit, and reduce power consumption. Among them, the size of the driving device of the first light-emitting unit B can be compressed to be larger because the luminous efficiency of the first light-emitting unit B is lower, and the size of the driving device of the third light-emitting unit R can be compressed to be smaller because the luminous efficiency of the third light-emitting unit R is higher than that of the first light-emitting unit B and lower than that of the second light-emitting unit G.

[0088] In addition, the size of the driving device of the first light emitting unit B or the third light emitting unit R is shortened, which can also improve the problem of the display panel 100 emitting green after the RA test (Reliability Assessment test).

[0089] Correspondingly, the pixel opening 20 includes a first type of opening, a second type of opening and a third type of opening, which are used to accommodate the first light-emitting unit B, the second light-emitting unit G and the third light-emitting unit R, respectively, which can enhance the richness of the display of the display panel 100.

[0090] Reference Figure 8 As shown, in some embodiments, the light emitting unit 3 includes a first electrode 31, which is disposed on a side of the pixel definition structure 2 close to the substrate 1, and the orthographic projection of the first electrode 31 on the substrate 1 at least partially overlaps with the orthographic projection of the pixel definition structure 2 on the substrate 1. Optionally, the pixel definition structure 2 at least covers an edge of the first electrode 31, and the edge of the first electrode 31 is located between the planarization layer 4 and the pixel definition structure 2, and the first electrode 31 is partially exposed to the pixel opening 20.

[0091] Optionally, the pixel definition structure 2 also covers the gaps between the first electrodes 31 of adjacent light emitting units 3 .

[0092] Furthermore, the light emitting unit 3 further includes a light emitting layer 32 and a second electrode 33 which are sequentially stacked in a direction away from the first electrode 31. The first electrode 31 is an anode, and the second electrode 33 is a cathode.

[0093] Meanwhile, the light emitting layer 32 and the second electrode 33 are located in the pixel opening 20 , and different voltages are configured on the first electrode 31 and the second electrode 33 to form a voltage difference between the first electrode 31 and the second electrode 33 , thereby driving the light emitting layer 32 to emit light.

[0094] Based on the same inventive concept, Fig.10As shown, some other embodiments of the present application further provide a display panel, the display panel 100 includes a substrate 1, a pixel definition structure 2, a light-emitting unit 3 and a planarization layer 4. The pixel definition structure 2 is arranged on one side of the substrate 1, the pixel definition structure 2 includes a plurality of pixel openings 20, at least part of the light-emitting unit 3 is located in the pixel openings 20, and the planarization layer 4 is arranged on the side of the pixel definition structure 2 close to the substrate 1. The surface of the pixel definition structure 2 away from the substrate 1 is provided with a fourth protrusion 204. The surface of the planarization layer 4 away from the substrate 1 includes a fifth protrusion 405, and the orthographic projection of the fifth protrusion 405 on the substrate 1 at least partially overlaps with the orthographic projection of the fourth protrusion 204 on the substrate 1.

[0095] Specifically, the fifth protrusion 405 of the planarization layer 4 corresponds to the fourth protrusion 204 of the pixel definition structure 2 in vertical position, and the planarization layer 4 can be patterned by half-tone mask technology to form the fifth protrusion 405 with an elevated height.

[0096] The display panel 100 provided in this embodiment forms a fourth protrusion 204 on the surface of the pixel definition structure 2 by setting a fifth protrusion 405 on the planarization layer 4. When the light in the pixel opening 20 encounters the fourth protrusion 204, reflection will occur, which can converge the light that was originally lost by diverging to the edge and guide more light to be emitted to the front, thereby reducing edge light loss, thereby improving luminous efficiency and reducing power consumption.

[0097] Continue to refer to Fig.10 As shown, in some embodiments, the light-emitting unit 3 includes a first electrode 31, which is disposed on a side of the planarization layer 4 away from the substrate 1, and the pixel definition structure 2 at least covers an edge of the first electrode 31, so that the first electrode 31 is partially exposed to the pixel opening 20.

[0098] Optionally, an orthographic projection of the first electrode 31 on the substrate 1 at least partially overlaps with an orthographic projection of the fourth protrusion 204 on the substrate 1 .

[0099] Optionally, an orthographic projection of the first electrode 31 on the substrate 1 at least partially overlaps with an orthographic projection of the fifth protrusion 405 on the substrate 1 .

[0100] Specifically, the edge of the first electrode 31 is located between the planarization layer 4 and the pixel definition structure 2 , specifically between the fifth protrusion 405 and the fourth protrusion 204 , thus achieving a padding effect.

[0101] Based on the same inventive concept, some other embodiments of the present application further provide a display device, which includes the display panel in the above embodiment. Further, the display device includes a mobile phone, VR equipment, computer, television, car display equipment, etc.

[0102] A display device provided in this embodiment has a display panel 100 in which the surface of the pixel definition structure 2 away from the substrate 1 is set to a hill shape. When the light in the pixel opening 20 encounters the first recessed portion 202 and the first raised portion 203, reflection occurs, which can converge the light that was originally lost by diverging to the edge and guide more light to be emitted to the front, thereby reducing edge light loss, thereby improving luminous efficiency and reducing power consumption.

[0103] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0104] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0105] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; A pixel definition structure, the pixel definition structure is disposed on one side of the substrate, and the pixel definition structure includes a plurality of pixel openings; a light emitting unit, wherein the light emitting unit is at least partially located in the pixel opening; Among them, at least part of the surface of the pixel definition structure away from the substrate includes a first side wall portion, a first recessed portion and a first raised portion connected in sequence, the first side wall portion is used to enclose the pixel opening, the distance between the first recessed portion and the substrate is smaller than the maximum distance between the first side wall portion and the substrate, and the maximum distance between the first raised portion and the substrate is larger than the maximum distance between the first side wall portion and the substrate.

2. The display panel according to claim 1, characterized in that: The pixel definition structure includes a pixel definition layer, and the first sidewall portion, the first recessed portion, and the first protruding portion are located on a surface of the pixel definition layer away from the substrate; Preferably, the first recessed portion comprises an annular groove arranged around the first raised portion.

3. The display panel according to claim 1, characterized in that: The display panel comprises: A planarization layer, the planarization layer is disposed on a side of the pixel definition structure close to the substrate; Preferably, the surface of the planarization layer on the side away from the substrate comprises a plane portion, a second protruding portion, a second concave portion and a third protruding portion connected in sequence, the maximum distance between the second protruding portion and the substrate is greater than the distance between the plane portion and the substrate, the maximum distance between the third protruding portion and the substrate is greater than the maximum distance between the second protruding portion and the substrate, and the minimum distance between the second concave portion and the substrate is less than the maximum distance between the first protruding portion and the substrate; wherein the orthographic projection of the third protruding portion on the substrate at least partially overlaps with the orthographic projection of the first protruding portion on the substrate; Preferably, the light emitting unit is arranged on the plane portion; Preferably, an orthographic projection of the second recessed portion on the substrate at least partially overlaps with an orthographic projection of the first recessed portion on the substrate.

4. The display panel according to claim 1, characterized in that: The pixel definition structure comprises a pixel definition layer and a support column, wherein the support column is arranged on a side of the pixel definition layer away from the substrate, and an orthographic projection of the support column on the substrate is located within an orthographic projection of the pixel definition layer on the substrate; the first sidewall portion is located on a surface of the pixel definition layer away from the substrate, and the first protrusion portion is located on a surface of the support column away from the substrate; Preferably, the first recessed portion comprises an annular gap surrounding the support column.

5. The display panel according to claim 1, characterized in that: The pixel definition structure includes a first pixel definition structure and a second pixel definition structure; The first pixel definition structure includes a pixel definition layer, and the first sidewall portion, the first recessed portion, and the first protruding portion of the first pixel definition structure are located on a surface of the pixel definition layer away from the substrate; The second pixel definition structure includes a pixel definition layer and a support column, wherein the support column is arranged on a side of the pixel definition layer away from the substrate, and the orthographic projection of the support column on the substrate is located within the orthographic projection of the pixel definition layer on the substrate; the first sidewall portion of the second pixel definition structure is located on a surface of the pixel definition layer away from the substrate, and the first protrusion of the second pixel definition structure is located on a surface of the support column away from the substrate.

6. The display panel according to claim 1, characterized in that: The light-emitting unit comprises a first light-emitting unit and a second light-emitting unit having different colors of emitted light; The light emitting unit includes a driving device, the driving device includes a semiconductor layer, the semiconductor layer includes a source region, a drain region, and a channel region located between the source region and the drain region; In a direction parallel to the substrate, in the semiconductor layer corresponding to the first light-emitting unit, the source region, the channel region and the drain region are arranged along the same straight line; Preferably, the light-emitting unit further comprises a third light-emitting unit whose emitted light color is different from that of the first light-emitting unit and the second light-emitting unit; Preferably, the sum of the lengths of the source region, the channel region and the drain region in the semiconductor layer corresponding to the third light-emitting unit is smaller than the sum of the lengths of the source region, the channel region and the drain region in the semiconductor layer corresponding to the second light-emitting unit.

7. The display panel according to claim 1, characterized in that: The light-emitting unit comprises a first electrode, the first electrode is arranged on a side of the pixel definition structure close to the substrate, and an orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the pixel definition structure on the substrate; Preferably, the pixel definition structure at least covers an edge of the first electrode; Preferably, the pixel definition structure covers the gap between the first electrodes of adjacent light-emitting units; Preferably, the light-emitting unit further comprises a light-emitting layer and a second electrode which are sequentially stacked in a direction away from the first electrode; Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

8. A display panel, characterized in that: The display panel comprises: substrate; A pixel definition structure, the pixel definition structure is arranged on one side of the substrate, the pixel definition structure comprises a plurality of pixel openings; a fourth protrusion is arranged on a surface of the pixel definition structure away from the substrate; a light emitting unit, wherein the light emitting unit is at least partially located in the pixel opening; A planarization layer is arranged on a side of the pixel definition structure close to the substrate; a fifth protrusion is arranged on a surface of the planarization layer away from the substrate, and an orthographic projection of the fifth protrusion on the substrate at least partially overlaps with an orthographic projection of the fourth protrusion on the substrate.

9. The display panel according to claim 8, characterized in that: The light-emitting unit comprises a first electrode, the first electrode is arranged on a side of the planarization layer away from the substrate, and the pixel definition structure at least covers an edge of the first electrode; Preferably, the orthographic projection of the first electrode on the substrate at least partially overlaps with the orthographic projection of the fourth protrusion on the substrate; Preferably, an orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the fifth protrusion on the substrate.

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

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