CN113380969B - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN113380969B CN113380969B CN202110638552.5A CN202110638552A CN113380969B CN 113380969 B CN113380969 B CN 113380969B CN 202110638552 A CN202110638552 A CN 202110638552A CN 113380969 B CN113380969 B CN 113380969B
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- H—ELECTRICITY
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- 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
Abstract
The invention provides a display panel, a manufacturing method thereof and a display device, wherein in the process of preparing the display panel, after a mask plate and a substrate are aligned according to preset deviation in a first direction and a second direction, a subsequent etching process is carried out, and finally the number of opposite deviations occurring in the first direction and the second direction of a second opening of a first refraction layer and a first opening on a pixel definition layer is within an allowable range, so that the condition that the display panel has optical difference of visual angles in different directions is improved, the light emitting effect of the display panel is improved, and the display effect of the display panel is high.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
Compared with a liquid crystal display screen, the organic light-emitting display screen has the advantages of being lighter and thinner, high in brightness, low in power consumption, fast in response, high in definition, good in flexibility, high in light-emitting efficiency and the like, and gradually becomes a mainstream display technology. The organic light emitting display screen has the light emitting principle that holes generated by an anode and electrons generated by a cathode in an organic light emitting device move under the action of an electric field, are respectively injected into a hole transport layer and an electron transport layer and migrate to an organic light emitting material layer, and when the holes and the electrons meet at the light emitting material layer, energy excitons are generated, so that light emitting molecules in the organic light emitting material layer are excited to generate visible light. The light emitting effect of the existing organic light emitting display screen is poor and needs to be improved.
Disclosure of Invention
In view of this, the invention provides a display panel, a manufacturing method thereof and a display device, which effectively solve the technical problems in the prior art, improve the light emitting effect of the display panel, and ensure that the display effect of the display panel is high.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method of manufacturing a display panel, comprising:
providing a substrate base plate and a mask plate, wherein the substrate base plate comprises: a substrate; a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units; a pixel defining layer including a plurality of first openings corresponding to the light emitting units, the light emitting units being located in the first openings; the refraction layer to be etched is positioned on one side, away from the substrate, of the pixel defining layer; the mask plate comprises a plurality of open holes corresponding to the first openings, and the sizes of the corresponding first openings and the corresponding open holes are the same;
after aligning a mask plate with the substrate base plate by preset deviation in a first direction and a second direction, exposing the refraction layer to be etched through the opening, wherein the first direction and the second direction are parallel to the plane of the substrate base plate, and the first direction and the second direction are perpendicular to each other.
Optionally, after exposing the refraction layer to be etched, the method includes:
developing an exposure area of the refraction layer to be etched to obtain a first refraction layer, wherein the first refraction layer comprises a plurality of second openings corresponding to the exposure area, and the second openings correspond to the first openings; in the first direction, the number of the corresponding first openings and the second openings with a first offset is within an allowable range, and the direction of the first offset is opposite to that of the second offset; and in the second direction, the number of the corresponding first openings and the second openings with third deviation is within an allowable range of difference with the number of the corresponding first openings and the second openings with fourth deviation, and the directions of the third deviation and the fourth deviation are opposite.
Optionally, the method for acquiring the preset deviation includes:
providing an auxiliary substrate base plate and an auxiliary mask plate, wherein the auxiliary substrate base plate is the same as the substrate base plate, and the auxiliary mask plate is the same as the mask plate; the auxiliary substrate base plate includes: an auxiliary substrate; an auxiliary light emitting unit layer on one side of the auxiliary substrate, the auxiliary light emitting unit layer including a plurality of auxiliary light emitting units; an auxiliary pixel defining layer including a plurality of auxiliary first openings corresponding to the auxiliary light emitting units, the auxiliary light emitting units being positioned within the auxiliary first openings; the auxiliary refraction layer to be etched is positioned on one side, away from the auxiliary substrate, of the auxiliary pixel defining layer; the auxiliary mask plate comprises a plurality of auxiliary open holes corresponding to the auxiliary first openings, and the sizes of the corresponding auxiliary first openings and the auxiliary open holes are the same;
aligning the auxiliary mask plate and the auxiliary substrate base plate in a first direction and a second direction without deviation, and exposing the auxiliary refraction layer to be etched through the auxiliary opening;
developing an exposure area of the auxiliary refraction layer to be etched to obtain an auxiliary first refraction layer, wherein the auxiliary first refraction layer comprises a plurality of auxiliary second openings corresponding to the exposure area, and the auxiliary second openings correspond to the auxiliary first openings;
and determining the preset deviation according to the corresponding auxiliary first opening and the auxiliary second opening and the deviation condition in the first direction and the second direction.
Optionally, in the first direction, the number of the corresponding first openings and the second openings with a first offset differs by no more than 5% from the number of the corresponding first openings and the second openings with a second offset;
and in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset.
Optionally, the offset values of the first offset and the second offset range from (0 to 0.8 μm);
the offset values of the third offset and the fourth offset are in the range of (0 to 0.8 [ mu ] m ].
Optionally, after the forming of the first refraction layer, the method further includes:
the first refraction layer deviates from a second refraction layer is formed on one side of the substrate, the second refraction layer covers the first refraction layer and the second opening, and the refractive index of the second refraction layer is larger than that of the first refraction layer.
Correspondingly, the present invention also provides a display panel, comprising:
a substrate;
a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units;
a pixel defining layer including a plurality of first openings corresponding to the light emitting units, the light emitting units being located in the first openings;
the first refraction layer is positioned on one side, away from the substrate, of the pixel definition layer and comprises a plurality of second openings, and the second openings correspond to the first openings; in a first direction, the number of the corresponding first openings and the second openings with a first offset is within an allowable range, and the direction of the first offset is opposite to that of the second offset; and, in a second direction, the number of corresponding first and second openings having a third offset, the difference in the number of corresponding first and second openings having a fourth offset being within an allowable range, the third and fourth offsets being in opposite directions; the first direction and the second direction are parallel to the surface of the substrate, and the first direction is perpendicular to the second direction.
Optionally, in the first direction, the number of the corresponding first openings and the second openings with a first offset differs by no more than 5% from the number of the corresponding first openings and the second openings with a second offset;
and in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset.
Optionally, the offset values of the first offset and the second offset range from (0 to 0.8 μm);
the offset values of the third offset and the fourth offset are in the range of (0 to 0.8 [ mu ] m ].
Optionally, the display panel includes a plurality of pixel regions, each pixel region corresponds to one of the light emitting units, and the pixel regions include a red pixel region, a green pixel region, and a blue pixel region;
the green pixel area corresponding to a first offset is larger than the red pixel area corresponding to a first offset, and the red pixel area corresponding to a first offset is larger than the blue pixel area corresponding to a first offset;
and/or the offset value of the green pixel area corresponding to the second offset is larger than the offset value of the red pixel area corresponding to the second offset, and the offset value of the red pixel area corresponding to the second offset is larger than the offset value of the blue pixel area corresponding to the second offset;
and/or the offset value of the green pixel area corresponding to the third offset is greater than the offset value of the red pixel area corresponding to the third offset, and the offset value of the red pixel area corresponding to the third offset is greater than the offset value of the blue pixel area corresponding to the third offset;
and/or the offset value of the green pixel area corresponding to the fourth offset is greater than the offset value of the red pixel area corresponding to the fourth offset, and the offset value of the red pixel area corresponding to the fourth offset is greater than the offset value of the blue pixel area corresponding to the fourth offset.
Optionally, the display panel includes a plurality of pixel regions, each pixel region corresponds to one of the light emitting units, and the pixel regions include a red pixel region, a green pixel region, and a blue pixel region;
the first opening is rectangular, and the ratio of the length of the first opening in the first direction to the length of the first opening in the second direction is a ratio k;
the ratio k corresponding to the blue pixel area is greater than the ratio k corresponding to the red pixel area, and the ratio k corresponding to the red pixel area is greater than the ratio k corresponding to the green pixel area.
Optionally, the first refraction layer deviates from the substrate side and further comprises a second refraction layer, the second refraction layer covers the first refraction layer and the second opening, and the refractive index of the second refraction layer is larger than that of the first refraction layer.
Correspondingly, the invention further provides a display device which comprises the display panel.
Compared with the prior art, the technical scheme provided by the invention at least has the following advantages:
the invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises the following components: providing a substrate base plate and a mask plate, wherein the substrate base plate comprises: a substrate; a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units; a pixel defining layer including a plurality of first openings corresponding to the light emitting units, the light emitting units being located in the first openings; the refraction layer to be etched is positioned on one side, away from the substrate, of the pixel defining layer; the mask plate comprises a plurality of open holes corresponding to the first openings, and the sizes of the corresponding first openings and the corresponding open holes are the same; after a mask plate and a substrate are aligned with preset deviation in a first direction and a second direction, the mask plate and the substrate are exposed through the opening of the substrate, the first direction is parallel to the plane where the substrate is located, and the first direction is perpendicular to the second direction.
According to the technical scheme provided by the invention, in the process of preparing the display panel, after the mask plate and the substrate are aligned according to the preset deviation in the first direction and the second direction, the subsequent etching process is carried out, and finally, the number of the second openings of the first refraction layer and the first openings on the pixel definition layer which have opposite deviation in the first direction and the second direction is within the allowable range, so that the condition that the display panel has optical difference of visual angles in different directions is improved, the light emitting effect of the display panel is improved, and the high display effect of the display panel is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mask and a substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view along AA' of FIG. 3;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a flowchart of a preset deviation obtaining method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background art, the organic light emitting display has many advantages such as being lighter and thinner, having high brightness, low power consumption, fast response, high definition, good flexibility, and high light emitting efficiency, compared with the liquid crystal display, and gradually becomes the mainstream display technology. The organic light emitting display screen has the light emitting principle that holes generated by an anode and electrons generated by a cathode in an organic light emitting device move under the action of an electric field, are respectively injected into a hole transport layer and an electron transport layer and migrate to an organic light emitting material layer, and when the holes and the electrons meet at the light emitting material layer, energy excitons are generated, so that light emitting molecules in the organic light emitting material layer are excited to generate visible light. The light emitting effect of the existing organic light emitting display screen is poor and needs to be improved.
Therefore, the embodiment of the invention provides a display panel, a manufacturing method thereof and a display device, which effectively solve the technical problems in the prior art, improve the light emitting effect of the display panel and ensure the high display effect of the display panel.
To achieve the above object, the technical solutions provided by the embodiments of the present invention are described in detail below, specifically with reference to fig. 1 to 14.
Referring to fig. 1, a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention is shown, where the method includes:
s1, providing a substrate base plate and a mask plate, wherein the substrate base plate comprises: a substrate; a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units; the pixel definition layer comprises a plurality of first openings which correspond to the light-emitting units one by one, and the light-emitting units are positioned in the first openings; the refraction layer to be etched is positioned on one side, away from the substrate, of the pixel defining layer; the mask plate comprises a plurality of holes corresponding to the first openings one to one, and the sizes of the corresponding first openings and the corresponding holes are the same.
S2, aligning a mask plate with the substrate base plate by preset deviation in a first direction and a second direction, and exposing the refraction layer to be etched through the opening, wherein the first direction and the second direction are parallel to the plane of the substrate base plate, and the first direction and the second direction are perpendicular to each other.
As shown in fig. 2, a schematic structural diagram of a mask plate and a substrate provided in an embodiment of the present invention is shown, where the substrate provided in the embodiment of the present invention includes: a substrate 210, a plurality of light emitting cells 220 positioned at one side of the substrate 210; a pixel defining layer 230, wherein the pixel defining layer 230 includes a plurality of first openings 231, and the light emitting unit 220 is located in the first openings 231; and a refraction layer 240 to be etched on a side of the pixel defining layer 230 facing away from the substrate 210.
And, the mask 100 includes a plurality of openings 110, the number of the openings 110 is the same as the number of the first openings 231, and the openings 110 correspond to the first openings 231 one by one. The to-be-etched refraction layer 240 at the corresponding first opening 231 is etched based on the opening 110, and the to-be-etched refraction layer 240 is etched to be a first refraction layer, and the first refraction layer includes second openings (not shown) corresponding to the first openings 231 one by one.
It can be understood that the number of the open holes of the mask plate provided by the embodiment of the present invention is the same as the number of the first openings of the pixel definition layer in the substrate, and when the mask plate and the substrate are aligned, one open hole corresponds to one first opening, and the size of the corresponding open hole is the same as that of the first opening. In the alignment process of the mask plate and the substrate, the mask plate and the substrate are aligned based on the preset deviation in the first direction and the second direction, so that the purpose of subsequently adjusting the deviation of the second opening on the first refraction layer and the deviation of the first opening on the pixel definition layer is achieved, and the influence caused by etching deviation is compensated.
In an embodiment of the present invention, after exposing the to-be-etched refraction layer, the technical solution provided by the present invention includes: developing an exposure area of the refraction layer to be etched to obtain a first refraction layer, wherein the first refraction layer comprises a plurality of second openings corresponding to the exposure area, and the second openings correspond to the first openings one by one; in the first direction, the number of the corresponding first openings and the second openings with a first offset is within an allowable range, and the direction of the first offset is opposite to that of the second offset; and in the second direction, the number of the corresponding first openings and the second openings with third deviation is within an allowable range of difference with the number of the corresponding first openings and the second openings with fourth deviation, and the directions of the third deviation and the fourth deviation are opposite.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 4 is a cross-sectional view along direction AA' in fig. 3. The first refractive layer 240 includes a plurality of second openings 241, and the second openings 241 are disposed corresponding to the first openings 231. And in the first direction X, the number of the corresponding first openings 231 and second openings 241 having the first offset a is within an allowable range from the number of the corresponding first openings 231 and second openings 241 having the second offset b, and the directions of the first offset a and the second offset b are opposite. And, in the second direction Y, the number of corresponding first openings 231 and second openings 241 with a third offset m is within an allowable range of the difference from the number of corresponding first openings 231 and second openings 241 with a fourth offset n, the third offset m and fourth offset n being in opposite directions.
It can be understood that, in the technical scheme provided by the embodiment of the present invention, in the process of preparing the display panel, after the mask plate and the substrate are aligned with the preset deviation in the first direction and the second direction, the subsequent etching process is performed, and finally, the number of the second openings of the first refraction layer (the first refraction layer is the refraction layer after etching the refraction layer to be etched) and the first openings on the pixel definition layer are within the allowable range, which are opposite to each other in the first direction and the second direction, respectively, so as to improve the condition that the display panel has optical differences in viewing angles in different directions, improve the light emitting effect of the display panel, and ensure that the display effect of the display panel is high.
In an embodiment of the invention, in the first direction, the number of the corresponding first openings and the corresponding second openings with the first offset and the number of the corresponding first openings and the corresponding second openings with the second offset differ by no more than 5%. That is, the number of corresponding first and second openings with the first offset s1 and the number of corresponding first and second openings with the second offset s2 satisfy | s1-s2|/s1 ≦ 5% or | s1-s2|/s2 ≦ 5%.
And in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset. That is, the number of corresponding first and second openings with the third offset s3 and the number of corresponding first and second openings with the fourth offset s4 satisfy | s3-s4|/s3 ≦ 5% or | s3-s4|/s4 ≦ 5%.
In an embodiment of the present invention, the offset values of the first offset and the second offset provided by the present invention are in a range of (0-0.8 μm), and the offset values of the third offset and the fourth offset are in a range of (0-0.8 μm), and the specific values are not limited in the present invention, and need to be specifically set according to the actual application.
In an embodiment of the present invention, after forming the first refraction layer, the method further includes: the first refraction layer deviates from a second refraction layer is formed on one side of the substrate, the second refraction layer covers the first refraction layer and the second opening, and the refractive index of the second refraction layer is larger than that of the first refraction layer. As shown in fig. 5, a schematic structural diagram of another display panel according to an embodiment of the present invention is provided, wherein the display panel according to the embodiment of the present invention includes a second refraction layer 250 located on a side of the first refraction layer 240 away from the substrate 210, wherein the second refraction layer 250 covers the first refraction layer 240 and the second opening 241, and a refractive index of the second refraction layer 250 is greater than a refractive index of the first refraction layer 240.
It can be understood that, in the display panel provided in the embodiment of the present invention, the first refractive layer having the second opening deflects the light beams emitted from the light emitting units at different angles, so that the light emitted from the light emitting units is emitted from the position right above the first opening, and the light emitting brightness at the first opening is ensured to be high, and the light mixing condition between adjacent first openings is avoided. Meanwhile, the number of the opposite offsets of the second opening of the first refraction layer and the first opening of the pixel definition layer in the first direction and the second direction is within an allowable range, so that the optical difference of the viewing angles of the display panel in different directions is improved, the light emitting effect of the display panel is improved, and the high display effect of the display panel is ensured.
In an embodiment of the invention, the first refractive layer and the second refractive layer provided by the invention may be located on a side of the encapsulation layer of the display panel, which faces away from the substrate. As shown in fig. 6, which is a schematic structural diagram of another display panel provided in an embodiment of the present invention, the display panel includes: and an encapsulation layer on a side of the pixel defining layer 240 facing away from the substrate 210. The encapsulation layer includes a first inorganic layer 261 positioned on a side of the pixel defining layer 230 facing away from the substrate 210, an organic layer 262 positioned on a side of the first inorganic layer 261 facing away from the substrate 210, and a second inorganic layer 263 positioned on a side of the organic layer 262 facing away from the substrate 210. The first refractive layer 240 is located on a side of the second inorganic layer 263 away from the substrate 210, and the second refractive layer 250 is located on a side of the first refractive layer 240 away from the substrate 210.
It should be noted that the light emitting unit provided by the embodiment of the present invention includes an anode, a light emitting layer, and a cathode sequentially stacked from the substrate to the pixel defining layer, wherein the anodes of different light emitting units are independently disposed in the pixel opening in a block shape; the cathode may be disposed in the pixel opening in an independent block shape, or may be in a whole surface structure covering the pixel defining layer and the pixel opening, which is not limited in the present invention. When the cathode is arranged in a whole-surface structure, the pixel defining layer is positioned between the cathode and the substrate, and the packaging layer is positioned on one side of the cathode, which is far away from the substrate. In addition, a buffer layer and other related transition structures may be further disposed between the encapsulation layer and the first refraction layer, which is the same as that in the prior art, and therefore, redundant description is not repeated in the present invention.
In an embodiment of the invention, the display panel provided by the invention may include polarizers or color resistance layers disposed on the side of the touch layer away from the substrate, which need to be specifically designed according to the light emitting type of the display panel. Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention, wherein the display panel may include a polarizer 270 disposed on a side of the second refraction layer 250 away from the substrate 210.
As shown in fig. 8, a flowchart of a method for acquiring a preset deviation according to an embodiment of the present invention is shown, where the method for acquiring a preset deviation according to an embodiment of the present invention includes:
s11, providing an auxiliary substrate base plate and an auxiliary mask plate, wherein the auxiliary substrate base plate is the same as the substrate base plate, and the auxiliary mask plate is the same as the mask plate; the auxiliary substrate base plate includes: an auxiliary substrate; an auxiliary light emitting unit layer on one side of the auxiliary substrate, the auxiliary light emitting unit layer including a plurality of auxiliary light emitting units; an auxiliary pixel defining layer including a plurality of auxiliary first openings in one-to-one correspondence with the auxiliary light emitting units, the auxiliary light emitting units being located in the auxiliary first openings; the auxiliary refraction layer to be etched is positioned on one side, away from the auxiliary substrate, of the auxiliary pixel defining layer; the auxiliary mask plate comprises a plurality of auxiliary holes corresponding to the auxiliary first openings one to one, and the sizes of the corresponding auxiliary first openings and the auxiliary holes are the same.
And S12, aligning the auxiliary mask plate and the auxiliary substrate base plate in a first direction and a second direction without deviation, and exposing the auxiliary refraction layer to be etched through the auxiliary opening.
S13, developing the exposure area of the auxiliary refraction layer to be etched to obtain an auxiliary first refraction layer, wherein the auxiliary first refraction layer comprises a plurality of auxiliary second openings corresponding to the exposure area, and the auxiliary second openings are in one-to-one correspondence with the auxiliary first openings.
And S14, determining the preset deviation according to the corresponding auxiliary first opening and the auxiliary second opening and the deviation condition of the first direction and the second direction.
It can be understood that, according to the technical solution provided in the embodiment of the present invention, after the display panel is conventionally prepared, the preset deviation can be reversely derived according to the offset conditions of the first direction and the second direction of all the corresponding auxiliary first openings and auxiliary second openings obtained by preparation.
Correspondingly, the embodiment of the invention also provides a display panel, and the display panel is prepared by adopting the manufacturing method provided by any one of the embodiments. As shown in fig. 3 and 4, the display panel according to the embodiment of the present invention includes:
a substrate 210.
And a light emitting unit layer on one side of the substrate 210, the light emitting unit layer including a plurality of light emitting units 220.
A pixel defining layer 230, wherein the pixel defining layer 230 includes a plurality of first openings 231 corresponding to the light emitting units 220 one by one, and the light emitting units are located in the first openings.
A first refraction layer 240 located on a side of the pixel defining layer 230 facing away from the substrate 210, wherein the first refraction layer 240 includes a plurality of second openings 241, and the second openings 241 are in one-to-one correspondence with the first openings 231; in the first direction X, the number of the corresponding first openings 231 and the second openings 241 with a first offset a is within an allowable range, and the difference of the number of the corresponding first openings 231 and the second openings 241 with a second offset b is within an allowable range, and the directions of the first offset a and the second offset b are opposite; and, in the second direction Y, the number of the corresponding first openings 231 and the second openings 241 with a third offset m is within an allowable range of the difference from the number of the corresponding first openings 231 and the second openings 241 with a fourth offset n, the third offset m and the fourth offset n being opposite in direction; the first direction X and the second direction Y are directions parallel to the surface of the substrate, and the first direction X is perpendicular to the second direction Y. The first direction X provided by the embodiment of the invention may be an extending direction of a scan line of the display panel, and the second direction Y may be an extending direction of a data line of the display panel.
It can be understood that the number of the openings of the mask provided by the embodiment of the present invention is the same as the number of the first openings of the pixel defining layer in the substrate, and when the mask and the substrate are aligned, one opening corresponds to one first opening, and the sizes of the openings and the first openings which are correspondingly arranged are the same. In the alignment process of the mask plate and the substrate, the mask plate and the substrate are aligned based on the preset deviation in the first direction and the second direction, so that the purpose of subsequently adjusting the deviation of the second opening on the first refraction layer and the deviation of the first opening on the pixel definition layer is achieved, and the influence caused by etching deviation is compensated.
According to the technical scheme provided by the embodiment of the invention, in the process of preparing the display panel, after the mask plate and the substrate are aligned according to the preset deviation in the first direction and the second direction, the subsequent etching process is carried out, and finally, the number of the second openings of the first refraction layer (the first refraction layer is the refraction layer after the refraction layer to be etched is etched) and the number of the first openings on the pixel definition layer are respectively in the allowable range, so that the visual angle optical difference of the display panel in different directions is improved, the light emitting effect of the display panel is improved, and the high display effect of the display panel is ensured.
In an embodiment of the invention, in the first direction, the number of the corresponding first openings and the corresponding second openings with the first offset and the number of the corresponding first openings and the corresponding second openings with the second offset differ by no more than 5%. That is, the number of corresponding first and second openings with the first offset s1 and the number of corresponding first and second openings with the second offset s2 satisfy | s1-s2|/s1 ≦ 5% or | s1-s2|/s2 ≦ 5%.
And in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset. That is, the number of corresponding first and second openings with the third offset s3 and the number of corresponding first and second openings with the fourth offset s4 satisfy | s3-s4|/s3 ≦ 5% or | s3-s4|/s4 ≦ 5%.
In an embodiment of the present invention, the offset values of the first offset and the second offset provided by the present invention are in a range of (0-0.8 μm), and the offset values of the third offset and the fourth offset are in a range of (0-0.8 μm), and the specific values are not limited in the present invention, and need to be specifically set according to the actual application.
Furthermore, in order to better improve the display effect of the display panel, the invention can perform a differential design on the offset value between the first opening and the second opening corresponding to the pixel areas with different colors of the display panel. Fig. 9 to 12 are schematic structural diagrams of display panels according to embodiments of the present invention. As shown in fig. 9, the display panel includes a plurality of pixel regions, each of the pixel regions corresponds to one of the light emitting units 220, and the pixel regions include a red pixel region R, a green pixel region G, and a blue pixel region B; the green pixel region G has an offset value corresponding to the first offset a greater than that of the red pixel region R, and the red pixel region R has an offset value corresponding to the first offset a greater than that of the blue pixel region B.
And/or, as shown in fig. 10, the display panel includes a plurality of pixel regions, each of the pixel regions corresponds to one of the light emitting units 220, and the pixel regions include a red pixel region R, a green pixel region G, and a blue pixel region B; the offset value of the green pixel area G corresponding to the second offset B is greater than the offset value of the red pixel area R corresponding to the second offset B, and the offset value of the red pixel area R corresponding to the second offset B is greater than the offset value of the blue pixel area B corresponding to the second offset B.
And/or, as shown in fig. 11, the display panel includes a plurality of pixel regions, each of the pixel regions corresponds to one of the light emitting units 220, and the pixel regions include a red pixel region R, a green pixel region G, and a blue pixel region B; the offset value of the green pixel area G corresponding to the third offset m is greater than the offset value of the red pixel area R corresponding to the third offset m, and the offset value of the red pixel area R corresponding to the third offset m is greater than the offset value of the blue pixel area B corresponding to the third offset m.
And/or, as shown in fig. 12, the display panel includes a plurality of pixel regions, each of the pixel regions corresponds to one of the light emitting units 220, and the pixel regions include a red pixel region R, a green pixel region G, and a blue pixel region B; the green pixel region G has an offset value corresponding to the fourth offset n that is greater than the offset value corresponding to the fourth offset n of the red pixel region R, and the red pixel region R has an offset value corresponding to the fourth offset n that is greater than the offset value corresponding to the fourth offset n of the blue pixel region B.
It can be understood that, in the pixel regions with different colors provided by the embodiments of the present invention, the light-emitting efficiency of the blue pixel region is less than that of the red pixel region, and the light-emitting efficiency of the red pixel region is less than that of the green pixel region. Because the edge line of the second opening of the first refraction layer is more consistent with the edge line of the first opening, and the light-emitting effect of the area is higher, the edge line of the second opening of the first refraction layer corresponding to the blue pixel area and the edge line of the first opening are set to be closest, the edge line of the second opening of the first refraction layer corresponding to the red pixel area and the edge line of the first opening are set to be farther, the edge line of the second opening of the first refraction layer corresponding to the green pixel area and the edge line of the first opening are set to be farther, and the uniformity of the whole light-emitting effect of the display panel is improved.
It should be noted that, in the embodiment of the present invention, the region corresponding to the red pixel region emits red light, the region corresponding to the blue pixel region emits blue light, and the region corresponding to the green pixel region emits green light; for this reason, the color of the light emitted from the corresponding regions of the pixel regions with different colors can be determined by the light emitting unit, i.e., the light emitting unit includes light emitting units emitting red light, blue light and green light. Or, the light emitted from the corresponding regions of the pixel regions with different colors may be determined by the color resist layer, that is, all the light emitting units emit white light, and respectively emit red light, blue light and green light after passing through the color resist layers with different colors, which is not limited in the present invention.
Furthermore, the embodiment of the invention can also perform a differential design on the sizes of the first openings corresponding to the pixel areas with different colors, so as to improve the display effect of the display panel. As shown in fig. 13, which is a schematic structural diagram of another display panel according to an embodiment of the present invention, wherein the display panel according to the embodiment of the present invention includes a plurality of pixel regions, each of the pixel regions corresponds to one of the light emitting units 220, and the pixel regions include a red pixel region R, a green pixel region G, and a blue pixel region B; the first opening 231 is rectangular, and the ratio of the length of the first opening 231 in the first direction X to the length thereof in the second direction Y is k; the ratio k corresponding to the blue pixel region B is greater than the ratio k corresponding to the red pixel region R, and the ratio k corresponding to the red pixel region R is greater than the ratio k corresponding to the green pixel region G.
It can be understood that, in the pixel regions with different colors provided by the embodiments of the present invention, the light-emitting efficiency of the blue pixel region is less than that of the red pixel region, and the light-emitting efficiency of the red pixel region is less than that of the green pixel region. The larger the value of the width-length ratio of the first opening is, the higher the light emitting efficiency is, and further, the width-length ratio of the first opening of the blue pixel area is set to be the largest, the width-length ratio of the first opening of the red pixel area is set to be medium, and the width-length ratio of the first opening of the green pixel area is set to be the smallest, so that the light emitting efficiency of the blue pixel area and the light emitting efficiency of the red pixel area are improved to different degrees, and the uniformity of the whole light emitting effect of the display panel is improved.
As shown in fig. 5, the display panel according to the embodiment of the invention further includes a second refractive layer 250 on a side of the first refractive layer 240 away from the substrate 210, wherein the second refractive layer 250 covers the first refractive layer 240 and the second opening 241, and a refractive index of the second refractive layer 250 is greater than a refractive index of the first refractive layer 240.
It can be understood that, in the display panel provided in the embodiment of the present invention, the first refractive layer having the second opening deflects the light beams emitted from the light emitting units at different angles, so that the light emitted from the light emitting units is emitted from the position right above the first opening, and the light emitting brightness at the first opening is ensured to be high, and the light mixing condition between adjacent first openings is avoided. Meanwhile, the number of the opposite offsets of the second opening of the first refraction layer and the first opening of the pixel definition layer in the first direction and the second direction is within an allowable range, so that the optical difference of the viewing angles of the display panel in different directions is improved, the light emitting effect of the display panel is improved, and the high display effect of the display panel is ensured.
Correspondingly, the embodiment of the invention also provides a display device, and the display device comprises the display panel provided by any one of the embodiments.
Referring to fig. 14, which is a schematic structural diagram of a display device according to an embodiment of the present invention, the display device according to the embodiment of the present invention may be a mobile terminal 1000, and the mobile terminal includes the display panel according to any one of the embodiments.
It should be noted that the display device provided in the embodiment of the present invention may also be a notebook, a tablet, a computer, a wearable device, and the like, and the present invention is not limited in particular.
The embodiment of the invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises the following components: providing a substrate base plate and a mask plate, wherein the substrate base plate comprises: a substrate; a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units; the pixel definition layer comprises a plurality of first openings which correspond to the light-emitting units one by one, and the light-emitting units are positioned in the first openings; the refraction layer to be etched is positioned on one side, away from the substrate, of the pixel defining layer; the mask plate comprises a plurality of open holes corresponding to the first openings, and the sizes of the corresponding first openings and the corresponding open holes are the same; after aligning a mask plate with the substrate base plate by preset deviation in a first direction and a second direction, exposing the refraction layer to be etched through the opening, wherein the first direction and the second direction are parallel to the plane of the substrate base plate, and the first direction and the second direction are perpendicular to each other.
As can be seen from the above, in the technical scheme provided in the embodiment of the present invention, in the process of preparing the display panel, after the mask plate and the substrate are aligned with the preset deviation in the first direction and the second direction, the subsequent etching process is performed, so that the number of the second opening of the first refraction layer and the first opening of the pixel definition layer, which have opposite deviations in the first direction and the second direction, are within the allowable range, thereby improving the condition of the display panel that the viewing angle optical differences in different directions occur, improving the light-emitting effect of the display panel, and ensuring the high display effect of the display panel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for manufacturing a display panel, comprising:
providing a substrate base plate and a mask plate, wherein the substrate base plate comprises: a substrate; a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units; a pixel defining layer including a plurality of first openings corresponding to the light emitting units, the light emitting units being located in the first openings; the refraction layer to be etched is positioned on one side, away from the substrate, of the pixel defining layer; the mask plate comprises a plurality of open holes corresponding to the first openings, and the sizes of the corresponding first openings and the corresponding open holes are the same;
aligning a mask plate and the substrate base plate by preset deviation in a first direction and a second direction, and exposing the refraction layer to be etched through the opening, wherein the first direction and the second direction are parallel to the plane of the substrate base plate, and the first direction and the second direction are vertical to each other;
after the refraction layer to be etched is exposed, the method comprises the following steps:
developing an exposure area of the refraction layer to be etched to obtain a first refraction layer, wherein the first refraction layer comprises a plurality of second openings corresponding to the exposure area, and the second openings correspond to the first openings; in the first direction, the number of the corresponding first openings and the second openings with a first offset is within an allowable range, and the direction of the first offset is opposite to that of the second offset; and, in the second direction, the number of corresponding first and second openings having a third offset, the difference in the number of corresponding first and second openings having a fourth offset being within an allowable range, the third and fourth offsets being in opposite directions;
in the first direction, the number of corresponding first and second openings having a first offset differs by no more than 5% from the number of corresponding first and second openings having a second offset;
and in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset.
2. The method for manufacturing a display panel according to claim 1, wherein the method for obtaining the preset deviation comprises:
providing an auxiliary substrate base plate and an auxiliary mask plate, wherein the auxiliary substrate base plate is the same as the substrate base plate, and the auxiliary mask plate is the same as the mask plate; the auxiliary substrate base plate includes: an auxiliary substrate; an auxiliary light emitting unit layer on one side of the auxiliary substrate, the auxiliary light emitting unit layer including a plurality of auxiliary light emitting units; an auxiliary pixel defining layer including a plurality of auxiliary first openings corresponding to the auxiliary light emitting units, the auxiliary light emitting units being positioned in the auxiliary first openings; the auxiliary refraction layer to be etched is positioned on one side, away from the auxiliary substrate, of the auxiliary pixel defining layer; the auxiliary mask plate comprises a plurality of auxiliary open holes corresponding to the auxiliary first openings, and the sizes of the corresponding auxiliary first openings and the auxiliary open holes are the same;
aligning the auxiliary mask plate and the auxiliary substrate base plate in a first direction and a second direction without deviation, and exposing the auxiliary refraction layer to be etched through the auxiliary opening;
developing an exposure area of the auxiliary refraction layer to be etched to obtain an auxiliary first refraction layer, wherein the auxiliary first refraction layer comprises a plurality of auxiliary second openings corresponding to the exposure area, and the auxiliary second openings correspond to the auxiliary first openings;
and determining the preset deviation according to the corresponding auxiliary first opening and the auxiliary second opening and the deviation condition in the first direction and the second direction.
3. The method for manufacturing a display panel according to claim 1, wherein the offset values of the first offset and the second offset are in a range of (0 to 0.8 μm ];
the offset values of the third offset and the fourth offset are in the range of (0 to 0.8 [ mu ] m ].
4. The method for manufacturing a display panel according to claim 1, further comprising, after forming the first refractive layer:
the first refraction layer deviates from a second refraction layer is formed on one side of the substrate, the second refraction layer covers the first refraction layer and the second opening, and the refractive index of the second refraction layer is larger than that of the first refraction layer.
5. A display panel, comprising:
a substrate;
a light emitting unit layer on one side of the substrate, the light emitting unit layer including a plurality of light emitting units;
a pixel defining layer including a plurality of first openings corresponding to the light emitting units, the light emitting units being located in the first openings;
the first refraction layer is positioned on one side, away from the substrate, of the pixel definition layer and comprises a plurality of second openings, and the second openings correspond to the first openings; in a first direction, the number of the corresponding first openings and the second openings with a first offset is within an allowable range, and the direction of the first offset is opposite to that of the second offset; and, in a second direction, the number of corresponding first and second openings having a third offset, the difference in the number of corresponding first and second openings having a fourth offset being within an allowable range, the third and fourth offsets being in opposite directions; the first direction and the second direction are parallel to the surface of the substrate, and the first direction and the second direction are perpendicular;
in the first direction, the number of corresponding first and second openings having a first offset differs by no more than 5% from the number of corresponding first and second openings having a second offset;
and in the second direction, the number of corresponding first openings and second openings with a third offset differs by no more than 5% from the number of corresponding first openings and second openings with a fourth offset.
6. The display panel according to claim 5, wherein the offset values of the first offset and the second offset are in a range of (0 to 0.8 μm ];
the offset values of the third offset and the fourth offset are in the range of (0 to 0.8 [ mu ] m ].
7. The display panel according to claim 5, wherein the display panel comprises a plurality of pixel regions, each pixel region corresponds to one of the light emitting units, and the pixel regions comprise a red pixel region, a green pixel region, and a blue pixel region;
the green pixel area corresponding to a first offset is larger than the red pixel area corresponding to a first offset, and the red pixel area corresponding to a first offset is larger than the blue pixel area corresponding to a first offset;
and/or the offset value of the green pixel area corresponding to the second offset is larger than the offset value of the red pixel area corresponding to the second offset, and the offset value of the red pixel area corresponding to the second offset is larger than the offset value of the blue pixel area corresponding to the second offset;
and/or the offset value of the green pixel area corresponding to the third offset is greater than the offset value of the red pixel area corresponding to the third offset, and the offset value of the red pixel area corresponding to the third offset is greater than the offset value of the blue pixel area corresponding to the third offset;
and/or the offset value of the green pixel area corresponding to the fourth offset is greater than the offset value of the red pixel area corresponding to the fourth offset, and the offset value of the red pixel area corresponding to the fourth offset is greater than the offset value of the blue pixel area corresponding to the fourth offset.
8. The display panel according to claim 5, wherein the display panel comprises a plurality of pixel regions, each pixel region corresponds to one of the light emitting units, and the pixel regions comprise a red pixel region, a green pixel region, and a blue pixel region;
the first opening is rectangular, and the ratio of the length of the first opening in the first direction to the length of the first opening in the second direction is a ratio k;
the ratio k corresponding to the blue pixel area is greater than the ratio k corresponding to the red pixel area, and the ratio k corresponding to the red pixel area is greater than the ratio k corresponding to the green pixel area.
9. The display panel according to claim 5, further comprising a second refractive layer on a side of the first refractive layer facing away from the substrate, wherein the second refractive layer covers the first refractive layer and the second opening, and a refractive index of the second refractive layer is greater than a refractive index of the first refractive layer.
10. A display device characterized in that it comprises a display panel according to any one of claims 5 to 9.
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| JP2013182846A (en) * | 2012-03-05 | 2013-09-12 | Sumitomo Chemical Co Ltd | Display apparatus |
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