CN114447258B - Display panel and display terminal - Google Patents
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- CN114447258B CN114447258B CN202210067581.5A CN202210067581A CN114447258B CN 114447258 B CN114447258 B CN 114447258B CN 202210067581 A CN202210067581 A CN 202210067581A CN 114447258 B CN114447258 B CN 114447258B
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- 239000000758 substrate Substances 0.000 claims abstract description 40
- 239000003086 colorant Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 50
- 239000000243 solution Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000007639 printing Methods 0.000 description 7
- 230000005284 excitation Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 238000007641 inkjet printing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000005525 hole transport Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a display panel and a display terminal; the display panel comprises a substrate, a pixel definition layer and a light-emitting layer, wherein the pixel definition layer and the light-emitting layer are arranged on the substrate, the pixel definition layer is provided with a plurality of openings, the light-emitting layer comprises a plurality of light-emitting units arranged in the plurality of openings, the pixel definition layer comprises a plurality of pixel dams, at least part of the pixel dams comprise a first part and a second part, the second part is arranged on one side, far away from the substrate, of the first part, the second part forms a step, and the opening size corresponding to the first part is smaller than the opening size corresponding to the second part; according to the application, the pixel dykes are arranged to comprise the first part and the second part, and the size of the opening formed by the first part and the second part is reduced along the light emitting direction of the display panel, so that the pixel dykes form a step structure, and overflow solution can be in secondary contact with the step structure to form a ridge bridge, thereby preventing the solution from further overflowing and reducing the risk of color mixing.
Description
Technical Field
The application relates to the field of display technology, in particular to a display panel and a display terminal.
Background
The conventional OLED device is manufactured by an evaporation method, but due to high material cost, the conventional OLED device is gradually replaced by an inkjet printing method, and the inkjet printing mainly includes spraying a solution on a display area of a display substrate, and then forming a thin film by evaporating a solvent.
However, due to limitations of printing accuracy and stability of the print head, some OLED devices are prone to color mixing and other phenomena caused by liquid overflow during printing, and display anomalies are further caused.
Disclosure of Invention
The application provides a display panel and a display terminal, which are used for solving the technical problem that the color mixing of the current OLED device easily causes abnormal display.
In order to solve the technical problems, the technical scheme provided by the application is as follows:
the present application provides a display panel, comprising:
a substrate;
a pixel defining layer disposed on the substrate, wherein the pixel defining layer is provided with a plurality of openings; and
a light emitting layer including a plurality of light emitting units disposed in a plurality of the openings;
wherein the pixel definition layer comprises a plurality of pixel dams, at least part of the pixel dams comprise a first part and a second part, and the second part is arranged on one side of the first part far away from the substrate;
and the first part and the second part form a step, and the opening size corresponding to the first part is smaller than the opening size corresponding to the second part.
In the display panel of the present application, the light emitting units include at least a first light emitting unit, a second light emitting unit, and a third light emitting unit having different colors;
in the light emitting direction of the display panel, the heights of the first light emitting unit, the second light emitting unit and the third light emitting unit are gradually reduced.
In the display panel of the present application, the first light emitting unit is a red light emitting unit, the second light emitting unit is a green light emitting unit, and the third light emitting unit is a blue light emitting unit.
In the display panel of the present application, the pixel defining layer includes a first pixel bank between the first light emitting unit and the second light emitting unit, a second pixel bank between the second light emitting unit and the third light emitting unit, and a third pixel bank between the third light emitting unit and the first light emitting unit;
wherein, in the light emitting direction of the display panel, the heights of the first pixel dykes and the third pixel dykes are larger than the height of the second pixel dykes.
In the display panel of the present application, the first pixel bank and the third pixel bank further include a third portion disposed on a side of the first portion remote from the substrate;
wherein, in the light emitting direction of the display panel, the surface height of the third part far away from the first part is larger than the surface height of the second part far away from the first part;
and the third part and the first part form a first step, the third part and the second part form a second step, and the height of the second step is different from the height of the first step in the light emitting direction of the display panel.
In the display panel of the present application, the first portion has a first surface on a side away from the substrate, and the second portion has a second surface on a side away from the substrate;
wherein, in the light emitting direction of the display panel, the first surface of the first pixel dam is flush with the second surface of the second pixel dam; and the first surface of the second pixel dykes is flush with the first surface of the third pixel dykes.
In the display panel of the present application, the first surface of the first portion and/or the second surface of the second portion are disposed in parallel with the substrate.
In the display panel of the present application, the first surface and/or the second surface is disposed at an angle to the substrate, and the first surface and/or the second surface is disposed at an angle less than 90 ° to the side surface of the third portion.
In the display panel of the application, the opening side surface of the pixel dykes, which is contacted with the light emitting units, is obliquely arranged;
wherein the inclination angle of the opening side face is 50 degrees to 55 degrees.
The application also provides a display terminal which comprises a terminal main body and the display panel, wherein the terminal main body and the display panel are combined into a whole.
The beneficial effects are that:
according to the application, at least part of the pixel dykes in the pixel definition layer are arranged to comprise the first part and the second part, and the opening size formed by the first part and the second part is reduced along the light emitting direction of the display panel, so that the pixel dykes form a step structure, and when the solution overflows in the printing process of the OLED device, the step structure can be in secondary contact with the overflowed solution to form a ridge bridge, so that the solution is prevented from overflowing further, and the color mixing risk is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the overall structure of a display panel according to the present application;
fig. 2 is a schematic view of a first structure of the pixel bank shown in fig. 1;
FIG. 3 is a schematic diagram of the operation of the pixel dam of the present application;
fig. 4 is a schematic view of a layer structure of a light emitting unit according to the present application;
FIG. 5 is a schematic diagram showing an arrangement of a plurality of light emitting units of the light emitting layer according to the present application;
FIG. 6 is a schematic view showing the overall structure of a second display panel according to the present application;
fig. 7 is a schematic view of a second structure of the pixel bank according to the present application;
FIG. 8 is a schematic view of the positions of the first and second steps according to the present application;
FIG. 9 is a schematic diagram of a comparison of the heights of the first and second surfaces according to the present application;
fig. 10 is a schematic view of a third structure of the pixel bank according to the present application.
Reference numerals illustrate:
the substrate 100, the pixel defining layer 200, the first portion 201, the second portion 202, the third portion 203, the opening 204, the first step 205, the second step 206, the first surface 207, the second surface 208, the first pixel bank 210, the second pixel bank 220, the third pixel bank 230, the light emitting layer 300, the first light emitting unit 310, the second light emitting unit 320, the third light emitting unit 330, the anode layer 301, the hole injecting layer 302, the hole transporting layer 303, the organic light emitting layer 304, the electron transporting layer 305, the electron injecting layer 306, the cathode layer 307.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
Conventional OLED devices are fabricated by evaporation methods, but are gradually replaced by inkjet printing methods due to the high material costs. The ink jet printing mainly ejects a solution on a display area of a display substrate, and then forms a thin film by a solvent evaporation method.
However, due to limitations of printing accuracy and stability of the print head, some OLED devices are prone to color mixing and other phenomena caused by liquid overflow during printing, and display anomalies are further caused. The application provides the following scheme based on the technical problems.
Referring to fig. 1 to 10, the present application provides a display panel, which includes a substrate 100, a pixel defining layer 200 disposed on the substrate 100, and a light emitting layer 300, wherein the pixel defining layer 200 is provided with a plurality of openings 204. The light emitting layer 300 includes a plurality of light emitting cells disposed within a plurality of the openings 204. The pixel defining layer 200 comprises a plurality of pixel dams, at least part of which comprises a first portion 201 and a second portion 202, the second portion 202 being arranged on a side of the first portion 201 remote from the substrate 100. The first portion 201 and the second portion 202 form a step, and the size of the opening 204 corresponding to the first portion 201 is smaller than the size of the opening 204 corresponding to the second portion 202.
According to the application, at least part of pixel dykes in the pixel definition layer 200 are arranged to comprise the first part 201 and the second part 202, and the size of an opening 204 formed by the first part 201 and the second part 202 is reduced along the light emitting direction of the display panel, so that the pixel dykes form a step structure, and when the solution overflows in the printing process of the OLED device, the overflow solution can be in secondary contact with the step structure to form a ridge (shown in fig. 3), so that the solution is prevented from further overflowing, and the color mixing risk is reduced.
The technical scheme of the present application will now be described with reference to specific embodiments. The following description of the embodiments is not intended to limit the preferred embodiments.
In this embodiment, the substrate 100 may be an array substrate, and the array substrate may include a flexible/rigid polyimide substrate and an array driving layer (not shown) disposed on the polyimide substrate, where the array driving layer is used to drive the light emitting unit to emit light.
In this embodiment, the pixel defining layer 200 may be made of an opaque dielectric material, such as silicon nitride, silicon dioxide material, or the like. The pixel defining layer 200 may have a plurality of pixel banks disposed in succession, the plurality of pixel banks disposed in succession enclose to form a plurality of openings 204, and the light emitting unit is fabricated in the openings 204 by an inkjet printing process.
In the display panel of the present application, referring to fig. 1 and 2, fig. 1 is a schematic view of a first overall structure of the display panel of the present application, and fig. 2 is a schematic view of a first structure of the pixel dam of fig. 1. The first portion 201 and the second portion 202 of the pixel bank may be integrally formed. In a top view direction of the display panel, a size of an opening 204 corresponding to a first portion 201 of the pixel dam on a peripheral side of each of the light emitting units is smaller than a size of an opening 204 corresponding to the second portion 202. That is, in the light emitting direction of the display panel, the opening 204 where each of the light emitting units is located is in a state of being "wide at the top and narrow at the bottom", wherein "top" indicates the light emitting direction close to the display panel and "bottom" indicates the light emitting direction far from the display panel.
In this embodiment, the first portion 201 and the second portion 202 may be made of a hydrophobic material, or the surfaces of the first portion 201 and the second portion 202 may be coated with a hydrophobic coating, so as to increase the surface tension of the inkjet solution on the surface of the pixel dam, and reduce the risk of overflow of the inkjet solution beyond the step surface.
In this embodiment, besides the step surface, the contact surfaces of the first portion 201 and the second portion 202 with the inkjet solution may be not provided with a hydrophobic coating or a hydrophilic coating, so that the inkjet solution can better enter the opening 204, and the film surface of the inkjet solution in the opening 204 is flat, so that uniform film formation is achieved, and light emitting uniformity is improved.
Referring to fig. 1, in the display panel of the present application, the side surface of the opening 204 where the pixel dam contacts the light emitting unit is disposed at an inclination angle of 50 degrees to 55 degrees. That is, the contact angle θ between the first and second portions 201 and 202 of the pixel bank and the light emitting unit is 50 to 55 degrees, so that the light emitting unit has higher light emitting efficiency and better uniformity.
Referring to fig. 4, fig. 4 is a schematic layer structure diagram of the light emitting units of the present application, in the display panel of the present application, each of the light emitting units may include an anode layer 301 disposed on the substrate 100, a hole injection layer 302 disposed on the anode layer 301, a hole transport layer 303 disposed on the hole injection layer 302, an organic light emitting layer 304 disposed on the hole transport layer 303, an electron transport layer 305 disposed on the organic light emitting layer 304, an electron injection layer 306 disposed on the electron transport layer 305, and a cathode layer 307 disposed on the electron injection layer 306. The hole injection layer 302, the hole transport layer 303, the organic light emitting layer 304, the electron injection layer 306, and the electron transport layer 305 may be collectively referred to as an organic functional layer.
In this embodiment, the light emitting units may include at least a first light emitting unit 310, a second light emitting unit 320, and a third light emitting unit 330 having different colors. For example, in the present embodiment, the first light emitting unit 310 may be a red light emitting unit (R), the second light emitting unit 320 may be a green light emitting unit (G), and the third light emitting unit 330 may be a blue light emitting unit (B). In other embodiments, the light emitting unit may also include a fourth light emitting unit, which may be a white light emitting unit (W).
In the present embodiment, the arrangement order of the pixels may include, but is not limited to, the following ways: BRGBR, RGBRGB/GRBGRB, monochromator RRR/GGG/BBB, etc., which are not particularly limited in this embodiment.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating an arrangement of a plurality of light emitting units of the light emitting layer 300, in the display panel of the present application, heights of the first light emitting unit 310, the second light emitting unit 320 and the third light emitting unit 330 in a light emitting direction of the display panel are gradually reduced. That is, in the light emitting direction of the display panel, the film thickness (volume) of the red light emitting unit (R) is largest, the film thickness (volume) of the green light emitting unit (G) is next largest, and the film thickness (volume) of the blue light emitting unit (B) is smallest.
It should be noted that, according to the energy of light, the energy of blue light is highest among red light, green light and blue light, and the corresponding required excitation energy is also the highest; the energy of the red light is inferior, and the corresponding required excitation energy is smaller than that of the blue light; the energy of the green light is the lowest and the corresponding required excitation energy is the smallest. That is, in the present embodiment, the excitation energy required for the blue light emitting unit (B) is maximum, the excitation energy required for the green light emitting unit (G) is next to the excitation energy required for the red light emitting unit (R) is minimum.
According to the embodiment, the thickness (volume) of the red light-emitting unit (R) is set to be the largest, the thickness (volume) of the blue light-emitting unit (B) is set to be the smallest, on one hand, the phenomenon that the device voltage becomes too high due to the fact that the blue light-emitting unit (B) is too thick can be avoided, so that the light-emitting stability of an OLED device is maintained, on the other hand, the requirements of energy levels of all layers in the light-emitting unit can be matched, and the total cavity length and other factors in the light-emitting unit are comprehensively considered, carrier balance is guaranteed, and therefore the target light color is achieved, and meanwhile, the light-emitting efficiency is high.
Referring to fig. 5, the pixel defining layer 200 includes a first pixel bank 210 between the first light emitting unit 310 and the second light emitting unit 320, a second pixel bank 220 between the second light emitting unit 320 and the third light emitting unit 330, and a third pixel bank 230 between the third light emitting unit 330 and the first light emitting unit 310.
In this embodiment, in the light emitting direction of the display panel, the heights of the first pixel bank 210 and the third pixel bank 230 are greater than the height of the second pixel bank 220, so that the first pixel bank 210 and the third pixel bank 230 can be higher than the first light emitting unit 310 with a larger thickness, and a more stable overflow blocking effect is achieved.
In this embodiment, since the heights of the second pixel dam 220 and the first pixel dam 210, the third pixel dam 230 are different, that is, the pixel dams on the substrate 100 are in a rugged state, the bending performance of the substrate 100 can be improved to a certain extent, so as to improve the bending performance of the OLED flexible display panel.
Referring to fig. 6 and 7, fig. 6 is a schematic diagram of a second overall structure of the display panel according to the present application, and fig. 7 is a schematic diagram of a second overall structure of the pixel dam according to the present application. In the display panel of the present application, the first pixel bank 210 and the third pixel bank 230 further include a third portion 203 disposed at a side of the first portion 201 remote from the substrate 100. In the light emitting direction of the display panel, the surface height of the third portion 203 away from the first portion 201 is greater than the surface height of the second portion 202 away from the first portion 201, so that the third portion 203 may protrude from the first portion 201 and the second portion 202, and further two steps are formed on two opposite sides of the first pixel dam 210/the third pixel dam 230, so as to better play a role of blocking overflow for two adjacent light emitting units.
In this embodiment, the third portion 203 and the first portion 201 form a first step 205, the third portion 203 and the second portion 202 form a second step 206, and a height of the second step 206 is different from a height of the first step 205 in a light emitting direction of the display panel.
Referring to fig. 8, fig. 8 is a schematic diagram illustrating the positions of the first step 205 and the second step 206 according to the present application.
Specifically, in the first pixel bank 210, the first step 205 is located at a side of the first pixel bank 210 adjacent to the second light emitting unit 320, and the second step 206 is located at a side of the first pixel bank 210 adjacent to the first light emitting unit 310. In the light emitting direction of the display panel, the height of the first step 205 is smaller than that of the second step 206, so that the height of the first step 205 may be slightly higher than that of the second light emitting unit 320 with a lower height, and the height of the second step 206 may be slightly higher than that of the first light emitting unit 310 with a higher height, thereby simultaneously playing a good role in blocking overflow for the adjacent first light emitting unit 310 and second light emitting unit 320.
Similarly, referring to fig. 8, in the third pixel bank 230, the first step 205 is located at a side of the third pixel bank 230 close to the first light emitting unit 310, and the second step 206 is located at a side of the third pixel bank 230 close to the third light emitting unit 330. In the light emitting direction of the display panel, the height of the first step 205 is higher than the height of the second step 206, so that the height of the first step 205 may be slightly higher than the first light emitting unit 310 with higher height, and the height of the second step 206 may be slightly higher than the third light emitting unit 330 with lower height, thereby simultaneously playing a good role in blocking overflow for the adjacent first light emitting unit 310 and third light emitting unit 330.
Referring to fig. 8, in the display panel of the present application, the first portion 201 has a first surface 207 on a side far from the substrate 100, and the second portion 202 has a second surface 208 on a side far from the substrate 100. In this embodiment, the first surface 207 may be a surface of the first step 205, and the second surface 208 may be a surface of the second step 206.
In this embodiment, in the light emitting direction of the display panel, the first surface 207 of the first pixel bank 210 may be disposed flush with the second surface 208 of the second pixel bank 220. That is, the first and second pixel banks 210 and 220 at the circumferential side of the second light emitting unit 320 have a stepped surface with a height level at a side close to the second light emitting unit 320 so that the edges of the second light emitting unit 320 are the same in height, improving the light emitting uniformity of the second light emitting unit 320.
Similarly, in the light emitting direction of the display panel, the first surface 207 of the second pixel bank 220 is flush with the first surface 207 of the third pixel bank 230. That is, the second pixel dykes 220, the third pixel dykes 220 at the circumference side of the third light emitting unit 330 have a step surface with a height level at a side close to the third light emitting unit 330, so that the edge heights of the third light emitting unit 330 are the same, improving the light emitting uniformity of the third light emitting unit 330.
Similarly, in the light emitting direction of the display panel, the second surface 208 of the third pixel bank 230 is flush with the second surface 208 of the first pixel bank 210. That is, the first and third pixel banks 210 and 230 at the circumferential side of the first light emitting unit 310 have a stepped surface with a height level at a side close to the first light emitting unit 310, so that the edges of the first light emitting unit 310 are the same in height, improving the light emitting uniformity of the first light emitting unit 310.
Referring to fig. 9, fig. 9 is a schematic diagram of comparing the heights of the first surface 207 and the second surface 208, in this embodiment, in the light emitting direction of the display panel, the height h1 of the second surface 208 of the first pixel bank 210 may be greater than the height h2 of the second surface 208 of the second pixel bank 220, and the height h2 of the second surface 208 of the second pixel bank 220 may be greater than the height h3 of the first surface 207 of the third pixel bank 230. Specifically, the height h1 of the second surface 208 of the first pixel bank 210 may be 0.9 to 1.3 micrometers, the height h2 of the second surface 208 of the second pixel bank 220 may be 0.6 to 0.8 micrometers, and the height h3 of the first surface 207 of the third pixel bank 230 may be 0.4 to 0.6 micrometers.
Referring to fig. 8, in the display panel of the present application, the first surface 207 of the first portion 201 and/or the second surface 208 of the second portion 202 may be disposed parallel to the substrate 100. At this time, the light emitting direction of the display panel is perpendicular to the first surface 207 and/or the second surface 208, that is, the first surface 207 of the first portion 201 and/or the second surface 208 of the second portion 202 are kept in a "relatively horizontal" state with the substrate 100, and the first portion 201 and the second portion 202 may form a step platform, which not only has a good overflow blocking effect, but also has relatively low processing difficulty.
Referring to fig. 10, fig. 10 is a schematic diagram of a third structure of the pixel dam according to the present application, in this embodiment, the first surface 207 and/or the second surface 208 may also be disposed at an angle with respect to the substrate 100, where the first surface 207 and/or the second surface 208 are "inclined with respect to the substrate 100". In this case, the first surface 207 and the second surface 208 may be inclined planes or inclined curved surfaces, which is not particularly limited in the embodiment of the present application.
In this embodiment, the angle between the first surface 207 and/or the second surface 208 and the side surface of the third portion 203 may be smaller than 90 °, that is, a concave space is formed between the first surface 207 and/or the second surface 208 and the third portion 203, and the inkjet solution may overflow into the concave space after exceeding the highest point of the first surface 207/the second surface 208, and the concave space may further reduce the overflow risk of the inkjet solution.
The embodiment of the application also provides a display terminal, which comprises a terminal main body and the display panel, wherein the terminal main body and the display panel are combined into a whole. In this embodiment, the display terminal may be a mobile phone, a computer (including a desktop, a notebook, a tablet, etc.), a television, a watch, etc.
According to the embodiment of the application, at least part of the pixel dykes in the pixel definition layer 200 are arranged to comprise the first part 201 and the second part 202, and the size of the opening 204 formed by the first part 201 and the second part 202 is reduced along the light emitting direction of the display panel, so that the pixel dykes form a step structure, and when the solution overflows in the printing process of the OLED device, the overflow solution can be in secondary contact with the step structure to form a ridge bridge, so that the solution is prevented from further overflowing, and the color mixing risk is reduced.
The display panel and the display terminal provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and the embodiments of the present application, and the description of the above embodiments is only used to help understand the method and the core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (10)
1. A display panel, comprising:
a substrate;
a pixel defining layer disposed on the substrate, wherein the pixel defining layer is provided with a plurality of openings; and
a light emitting layer including a plurality of light emitting units disposed in a plurality of the openings;
wherein the pixel definition layer comprises a plurality of pixel dams, at least part of the pixel dams comprise a first part and a second part, and the second part is arranged on one side of the first part far away from the substrate;
the first part and the second part form a step, and the opening size corresponding to the first part is smaller than the opening size corresponding to the second part;
the first part is provided with a first surface far away from one side of the substrate, and a concave space is formed between the first surface of at least one pixel dam and the second part.
2. The display panel according to claim 1, wherein the light emitting units include at least a first light emitting unit, a second light emitting unit, and a third light emitting unit having different colors;
in the light emitting direction of the display panel, the heights of the first light emitting unit, the second light emitting unit and the third light emitting unit are gradually reduced.
3. The display panel of claim 2, wherein the first light emitting unit is a red light emitting unit, the second light emitting unit is a green light emitting unit, and the third light emitting unit is a blue light emitting unit.
4. The display panel according to claim 3, wherein the pixel definition layer includes a first pixel bank between the first light emitting unit and the second light emitting unit, a second pixel bank between the second light emitting unit and the third light emitting unit, and a third pixel bank between the third light emitting unit and the first light emitting unit;
wherein, in the light emitting direction of the display panel, the heights of the first pixel dykes and the third pixel dykes are larger than the height of the second pixel dykes.
5. The display panel according to claim 4, wherein the first pixel bank and the third pixel bank further include a third portion provided at a side of the first portion remote from the substrate;
wherein, in the light emitting direction of the display panel, the surface height of the third part far away from the first part is larger than the surface height of the second part far away from the first part;
and the third part and the first part form a first step, the third part and the second part form a second step, and the height of the second step is different from the height of the first step in the light emitting direction of the display panel.
6. The display panel of claim 5, wherein the second portion has a second surface remote from the substrate side; wherein, in the light emitting direction of the display panel, the first surface of the first pixel dam is flush with the second surface of the second pixel dam; and the first surface of the second pixel dykes is flush with the first surface of the third pixel dykes.
7. The display panel according to claim 6, wherein the first surface of the first portion and/or the second surface of the second portion is disposed parallel to the substrate.
8. The display panel according to claim 6, wherein the first surface and/or the second surface is arranged at an angle to the substrate, and wherein the angle of the first surface and/or the second surface to the side of the third portion is smaller than 90 °.
9. The display panel according to claim 1, wherein an opening side surface of the pixel bank in contact with the light emitting unit is provided obliquely;
wherein the inclination angle of the opening side face is 50 degrees to 55 degrees.
10. A display terminal comprising a terminal body and a display panel according to any one of claims 1 to 9, the terminal body and the display panel being combined as one body.
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