CN113097278A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113097278A CN113097278A CN202110349121.7A CN202110349121A CN113097278A CN 113097278 A CN113097278 A CN 113097278A CN 202110349121 A CN202110349121 A CN 202110349121A CN 113097278 A CN113097278 A CN 113097278A
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- 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
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- 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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and reduces the risk of chamfering or separation of an extraction structure. The display panel includes: a substrate base plate; an anode; a pixel defining layer having a first opening, the anode overlapping the first opening; a light emitting layer positioned within the first opening; a cathode; the light extraction layer is positioned on one side of the cathode, which is back to the substrate base plate, and comprises an extraction structure and a plurality of epitaxial structures which are arranged on the same layer; the extraction structure is overlapped with the pixel definition layer, the epitaxial structure is communicated with the extraction structure and extends along the direction far away from the epitaxial structure, the lower surface of the epitaxial structure facing the substrate base plate is flush with the lower surface of the extraction structure facing the substrate base plate, and the orthographic projection of the epitaxial structure on the substrate base plate is overlapped with a partial area of the first opening; the film thickness of the epitaxial structure in the plane direction perpendicular to the substrate base plate is smaller than that of the extraction structure in the plane direction perpendicular to the substrate base plate.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Organic electroluminescent diode (OLED) Display panels are widely used due to their excellent characteristics, such as high brightness, high efficiency, wide viewing angle, and self-luminescence.
In the prior art, a light extraction structure 1 ' as shown in fig. 1 is usually disposed in the panel, and the light extraction structure 1 ' is used to extract the light emitted from the light emitting element 2 ' to a greater extent, so as to improve the light extraction efficiency of the panel. For better light-concentrating effect of the light extraction structure 1 ', it is usually necessary to have a larger angle θ' between the side wall 3 'and the bottom surface 4' of the light extraction structure 1 ', for example, θ' may be 70 °. However, with such a large included angle θ ', the chamfer shown in fig. 2 is likely to occur once the bottom of the light extraction structure 1 ' is over-etched in the process of the light extraction structure 1 '. Alternatively, once the material forming the upper film layer of the light extraction structure 1 ' penetrates from the bottom of the light extraction structure 1 ', the light extraction structure 1 ' is easily tilted up and then separated from the lower film layer.
The above-mentioned conditions all have adverse effects on the light extraction effect of the light extraction structure 1', and further affect the light extraction efficiency of the panel.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel and a display device, which reduce the risk of chamfering or separating the extraction structure, and improve the light-emitting efficiency of the panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a substrate base plate;
an anode on the substrate base plate;
a pixel defining layer positioned on a side of the anode opposite to the substrate base plate, the pixel defining layer having a first opening, and an orthographic projection of the anode on the substrate base plate overlapping the first opening;
the light-emitting layer is positioned on one side, back to the substrate base plate, of the anode and positioned in the first opening;
the cathode is positioned on one side, facing away from the substrate, of the pixel defining layer and the light emitting layer;
the light extraction layer is positioned on one side of the cathode, which is opposite to the substrate base plate, and comprises an extraction structure and a plurality of epitaxial structures which are arranged on the same layer;
wherein an orthographic projection of the extraction structure on the substrate base plate overlaps with an orthographic projection of the pixel defining layer on the substrate base plate, the epitaxial structure is communicated with the extraction structure and extends along a direction far away from the epitaxial structure, the lower surface of the epitaxial structure facing the substrate base plate is flush with the lower surface of the extraction structure facing the substrate base plate, and the orthographic projection of the epitaxial structure on the substrate base plate overlaps with a partial region of the first opening;
and the film thickness of the epitaxial structure in the plane direction perpendicular to the substrate base plate is smaller than that of the extraction structure in the plane direction perpendicular to the substrate base plate.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
One of the above technical solutions has the following beneficial effects:
in the embodiment of the application, through addding the epitaxial structure with the extraction structure intercommunication, in the manufacturing process on light extraction layer, can utilize epitaxial structure to separate extraction structure and sculpture regional interval, it has one section distance to make the interval between extraction structure and the sculpture region, under this condition, even take place the etching phenomenon, also can etch away partly epitaxial structure more, and can not lead to the fact the influence to the extraction structure, avoid extraction structure chamfer appearing, the contained angle between the lateral wall of extraction structure and the lower surface still is for predetermineeing the contained angle, thereby make it keep good spotlight effect. Moreover, after the light extraction layer is formed, the extraction structure and the hollow-out region of the light extraction layer are separated by the epitaxial structure, even if the forming material of the film layer on the side of the light extraction layer, which is opposite to the substrate, permeates into the bottom of the epitaxial structure from the bottom of the light extraction layer, the epitaxial structure can play a role in transition and interception of the forming material, the forming material is prevented from further permeating into the bottom of the extraction structure, and therefore the risk that the extraction structure is tilted or even separated is reduced.
In addition, the structure of the epitaxial structure is further improved, so that the epitaxial structure can not generate great influence on normal display while reducing the risks of chamfering and separation of the extraction structure. On one hand, the epitaxial structure is only overlapped with a partial area of the first opening, the first opening is not covered completely, and the influence of the epitaxial structure on the light outgoing of the first opening is reduced in a covering area mode; on the other hand, the film thickness of the epitaxial structure in the plane direction perpendicular to the substrate base plate is small, and the loss of light during transmission in the epitaxial structure is small; in another aspect, based on the arrangement manner that the epitaxial structure is communicated with the extraction structure and extends in the direction away from the epitaxial structure, when the epitaxial structure overlaps only a partial region of the first opening, the epitaxial structure only covers the edge region of the first opening and exposes the middle region of the first opening, and since the edge region is close to the boundary between the first opening and the non-opening region, even if the brightness of the edge region is slightly dark due to the fact that the epitaxial structure covers the edge region, the brightness difference is difficult to be recognized by human eyes.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a light extraction structure in the prior art;
FIG. 2 is a schematic diagram of another prior art light extraction structure;
FIG. 3 is a schematic diagram of yet another prior art light extraction structure;
FIG. 4 is a top view of a display panel according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A1-A2 of FIG. 4;
FIG. 6 is another cross-sectional view taken along line A1-A2 of FIG. 4;
fig. 7 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another epitaxial structure according to an embodiment of the present invention;
fig. 10 is a schematic view of another epitaxial structure provided in accordance with an embodiment of the present invention;
FIG. 11 is a further cross-sectional view taken along line A1-A2 of FIG. 4;
fig. 12 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another epitaxial structure according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention;
fig. 17 is a schematic structural diagram of another epitaxial structure provided in an embodiment of the invention;
fig. 18 is a schematic structural diagram of an anti-reflective structure provided in an embodiment of the invention;
fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
An embodiment of the present invention provides a display panel, as shown in fig. 4 and fig. 5, where fig. 4 is a top view of the display panel provided in the embodiment of the present invention, and fig. 5 is a cross-sectional view of fig. 4 along a direction a1-a2, the display panel includes: a base substrate 1; an anode 2 located on the base substrate 1; a pixel defining layer 3 positioned on the side of the anode 2 opposite to the substrate base plate 1, wherein the pixel defining layer 3 is provided with a first opening 4, and the orthographic projection of the anode 2 on the substrate base plate 1 is overlapped with the first opening 4; a light-emitting layer 5 located on the side of the anode 2 opposite to the substrate 1 and located in the first opening 4; a cathode 6 located on the side of the pixel defining layer 3 and the light emitting layer 5 facing away from the substrate 1; and the light extraction layer 7 is positioned on the side, opposite to the substrate base plate 1, of the cathode 6, and the light extraction layer 7 comprises an extraction structure 8 and a plurality of epitaxial structures 9 which are arranged on the same layer.
Wherein, the orthographic projection of the extraction structure 8 on the substrate base plate 1 overlaps with the orthographic projection of the pixel definition layer 3 on the substrate base plate 1, the epitaxial structure 9 is communicated with the extraction structure 8 and extends along the direction far away from the epitaxial structure 9, the lower surface of the epitaxial structure 9 facing the substrate base plate 1 is flush with the lower surface of the extraction structure 8 facing the substrate base plate 1, and the orthographic projection of the epitaxial structure 9 on the substrate base plate 1 overlaps with a partial region of the first opening 4.
And the film thickness d1 of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate base plate 1 is smaller than the film thickness d2 of the extraction structure 8 in the direction perpendicular to the plane of the substrate base plate 1.
Please refer to fig. 5 again, a high refractive index layer 15 is further disposed on a side of the light extraction layer 7 opposite to the substrate base plate 1, and a refractive index of the high refractive index layer 15 is greater than a refractive index of the light extraction layer 7. For the light with large angle emitted by the light emitting layer 5, a part of the light with large angle can be transmitted to the interface between the extraction structure 8 and the high refractive index layer 15 through the extraction structure 8, refraction occurs at the interface, the refracted light tends to be transmitted with small angle, and the light emitting brightness under the normal viewing angle is improved; and part of the light with large angle can directly transmit through the high refractive index layer 15 to the interface between the extraction structure 8 and the high refractive index layer 15, and is totally reflected at the interface, and the totally reflected light further transmits through the high refractive index layer 15 to exit the panel, so that the light-emitting efficiency of the display panel is further improved by using the high refractive index layer 15.
In the embodiment of the application, through addding epitaxial structure 9 with extraction structure 8 intercommunication, in the manufacturing process of light extraction layer 7, can utilize epitaxial structure 9 to separate extraction structure 8 and sculpture regional, it has one section distance to make the interval between extraction structure 8 and the sculpture region, under this condition, even take place the etching phenomenon, also can etch away partly epitaxial structure 9 more, and can not lead to the fact the influence to extraction structure 8, avoid extraction structure 8 to appear the chamfer, the contained angle between extraction structure 8's lateral wall and the lower surface still is predetermined contained angle, thereby make it keep good spotlight effect. Moreover, after the light extraction layer 7 is formed, the extraction structure 8 and the hollowed-out region of the light extraction layer 7 are separated by the epitaxial structure 9, even if a forming material of a film layer on the side of the light extraction layer 7 opposite to the substrate 1 permeates from the bottom of the light extraction layer 7, the forming material can permeate into the bottom of the epitaxial structure 9 at first, and the epitaxial structure 9 can play a role in transition and interception of the forming material, so that the forming material is prevented from further permeating into the bottom of the extraction structure 8, and the risk that the extraction structure 8 is tilted or even separated is reduced.
In addition, the structure of the epitaxial structure 9 is further improved, so that the epitaxial structure 9 does not have a great influence on normal display while reducing the risks of chamfering and separation of the extraction structure 8. On one hand, the epitaxial structure 9 is only overlapped with a partial region of the first opening 4, the first opening 4 is not fully covered, and the influence of the epitaxial structure 9 on the light emission of the first opening 4 is reduced by reducing the covering area; on the other hand, the film thickness of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate base plate 1 is small, and the loss of light during transmission in the epitaxial structure 9 is small; on the other hand, based on the arrangement manner that the epitaxial structure 9 is disposed in communication with the extraction structure 8 and extends in the direction away from the epitaxial structure 9, when the epitaxial structure 9 overlaps only a partial region of the first opening 4, the epitaxial structure 9 only covers the edge region of the first opening 4 and exposes the middle region of the first opening 4, and since the edge region is close to the boundary between the first opening 4 and the non-opening region, even if the brightness of the edge region is slightly dark due to the fact that the epitaxial structure 9 covers the edge region, the brightness difference is difficult to be recognized by human eyes.
It should be noted that, based on the current process capability, the angle between the sidewall of the epitaxial structure 9 on the side away from the extraction structure 8 and the lower surface of the epitaxial structure 9 may be smaller than 90 °, or equal to 90 °, or larger than 90 °.
In one embodiment, as shown in fig. 6, fig. 6 is another cross-sectional view taken along a1-a2 direction in fig. 4, and the display panel further includes a color film layer 22, wherein the color film layer 22 is located between the cathode 6 and the light extraction layer 7. The color film layer 22 comprises a color resistor 23, an orthographic projection of the color resistor 23 on the substrate base plate 1 overlaps with an orthographic projection of the light-emitting layer 5 on the substrate base plate 1, and the orthographic projection of the color resistor 23 on the substrate base plate 1 also overlaps with an orthographic projection of the extraction structure 8 and the epitaxial structure 9 on the substrate base plate 1.
After the external environment light is emitted into the panel, the light with the color different from that of the color resistance is filtered by the color resistance 22 and then transmitted to the anode 2 and reflected by the anode 2, the reflected light generates periodic interference to generate diffraction fringes, and then the reflected light can present obvious rainbow fringes in vision, thereby generating adverse effects on the viewing experience of users. In the embodiment of the present invention, the light extraction layer 7 is located on the side of the color resistor 22 opposite to the substrate base plate 1, and since the film thickness of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate base plate 1 is smaller than the film thickness of the extraction structure 8 in the direction perpendicular to the plane of the substrate base plate 1, a height difference exists between the epitaxial structure 9 and the extraction structure 8, and the epitaxial structure 9 and the extraction structure 8 form a step-like structure, which can change the optical path of light, thereby changing the optical path difference of light reaching the color resistor 22, further making the optical path difference between the reflected light no longer satisfy the interference condition, reducing diffraction, and further weakening the rainbow streak phenomenon of the display panel. Or, for the display panel with the camera shooting function, when the external environment light is collected by adopting optical components such as the camera shooting assembly and the like, the starburst phenomenon caused by diffraction in the imaged image can be effectively weakened based on the arrangement of the epitaxial structure 9, and the imaging effect is optimized.
Furthermore, the film thickness of the epitaxial structure 9 at the first opening 4 with different light-emitting colors can be adjusted, so that the film thicknesses of the epitaxial structures 9 at the first openings 4 with different light-emitting colors are different, the optical paths of the light with different colors are adjusted to different degrees, and the color separation phenomenon caused by diffraction is improved to a greater extent.
In an implementation manner, as shown in fig. 7, fig. 7 is a schematic structural diagram of an epitaxial structure according to an embodiment of the present invention, where the epitaxial structure 9 is a closed structure that surrounds the edge of the first opening 4 by a circle, and at this time, the epitaxial structure 9 can protect the extraction structure 8 in all directions, and any position of the extraction structure 8 is spaced apart from the etching region (hollow region) of the light extraction layer 7, so as to reduce the risk of the extraction structure 8 occurring a chamfer, a tilt, or even a detachment to a greater extent.
Moreover, the extension structure 9 is arranged around the first opening 4 for one circle, the shielding degree of the extension structure 9 to each position of the edge area of the first opening 4 is consistent, the light emitting brightness of different positions of the edge area is uniform, and the display effect is optimized.
Alternatively, in another implementation manner, as shown in fig. 8, fig. 8 is another structural schematic diagram of the epitaxial structure 9 provided in the embodiment of the present invention, each epitaxial structure 9 includes a plurality of sub-epitaxial structures 30, and the plurality of sub-epitaxial structures 30 are arranged along the edge of the first opening 4. In this kind of mode of arrangement, mutually independent between a plurality of sub-epitaxial structure 30, the bottom is not mutually linked, even the formation material of high refractive index layer 15 infiltrates the bottom of certain sub-epitaxial structure 30 and leads to this sub-epitaxial structure 30 perk, can not drive other sub-epitaxial structure 30 perks behind this sub-epitaxial structure 30 perk, at this moment, still can utilize other sub-epitaxial structure 30 that do not perk to carry out effective interception to the formation material of high refractive index layer 15, avoid its further infiltration to draw the structure 8 bottom.
Further, the sub-epitaxial structures 30 are arranged at equal intervals, that is, the intervals between two adjacent sub-epitaxial structures 30 are the same, so as to improve the uniformity of the brightness of the light emitted from the edge region.
In an implementation manner, as shown in fig. 9, fig. 9 is a schematic structural diagram of an epitaxial structure 9 provided in an embodiment of the present invention, where a length of the epitaxial structure 9 in an epitaxial direction (indicated by an arrow x in the figure) is positively correlated with a length of the first opening 4 overlapped with the epitaxial structure 9 in the epitaxial direction, and the epitaxial direction is an extending direction of the epitaxial structure 9 away from the extraction structure 8.
Taking the shape of the first opening 4 shown in fig. 9 as a rectangle as an example, the first opening 4 includes a first edge 16 extending in a first direction and a second edge 17 extending in a second direction, and the length of the first edge 16 is greater than the length of the second edge 17. The epitaxial structure 9 includes a first epitaxial portion 18 and a second epitaxial portion 19, the first epitaxial portion 18 extends in a first direction, the second epitaxial portion 19 extends in a second direction, and the length of the first epitaxial portion 18 in the epitaxial direction is greater than the length of the second epitaxial portion 19 in the epitaxial direction.
If the length of the epitaxial structure 9 in the epitaxial direction thereof is too small, the improvement effect of the epitaxial structure 9 on the problem of detachment of the extraction structure 8 is not obvious, the extraction structure 8 still has a greater risk of chamfering or detachment, and if the length of the epitaxial structure 9 in the epitaxial direction thereof is too large, the epitaxial structure 9 will shield the first opening 4 to a greater extent. Therefore, by making the length of the epitaxial structure 9 in the epitaxial direction thereof and the length of the first opening 4 in the epitaxial direction positively correlated, when the length of the first opening 4 in the epitaxial direction is large, even if the length of the epitaxial structure 9 is appropriately increased to avoid the occurrence of the chamfer or the detachment of the extraction structure 8 to a greater extent, it is still ensured that the first opening 4 has a long region in the epitaxial direction which is not blocked by the epitaxial structure 9. When the length of the first opening 4 in the extension direction is smaller, the length of the extension structure 9 can be correspondingly reduced, and the first opening 4 is prevented from being blocked too much in the extension direction.
In an implementation manner, as shown in fig. 10, fig. 10 is a schematic structural diagram of an epitaxial structure 9 provided in an embodiment of the present invention, where a length of the epitaxial structure 9 in an epitaxial direction is positively correlated with an area of the first opening 4 overlapped with the epitaxial structure 9, and the epitaxial direction is an extending direction of the epitaxial structure 9 away from the extraction structure 8.
In the display panel, the areas of the first openings 4 corresponding to the sub-pixels of different colors may be different. Taking the display panel including the red sub-pixel, the green sub-pixel and the blue sub-pixel as an example, the lifetime of the blue sub-pixel is more rapidly attenuated due to the characteristics of the light emitting material of the light emitting layer 5. Therefore, the area of the first opening 4 of the blue sub-pixel may be increased to reduce the current density, so that the lifetime decay rate of the blue sub-pixel and the lifetime decay rates of the red and green sub-pixels may be aligned.
At this time, the lengths of the epitaxial structures 9 at different positions in the epitaxial direction may be designed differently according to the area of the first opening 4. When the area of the first opening 4 is larger, the length of the extension structure 9 overlapped with the first opening 4 can be increased appropriately to avoid the extraction structure 8 from being chamfered or separated to a greater extent, and at this time, the first opening 4 still has a larger area not shielded by the extension structure 9. When the area of the first opening 4 is smaller, the length of the epitaxial structure 9 overlapped with the first opening 4 can be reduced accordingly, and the first opening 4 is prevented from being blocked too much.
In an embodiment, as shown in fig. 11, fig. 11 is a further cross-sectional view taken along a1-a2 direction in fig. 4, the display panel further includes a first insulating layer 20, the first insulating layer 20 is located on a side of the light extraction layer 7 facing the substrate base plate 1, the first insulating layer 20 has a plurality of second openings 21, and a portion of the epitaxial structure 9 is recessed in the second openings 21. The first insulating layer 20 may be a packaging layer, a buffer layer, or an insulating layer between the touch electrodes.
By recessing the epitaxial structure 9 in the second opening 21, on one hand, the sidewall of the second opening 21 and the portion of the epitaxial structure 9 are tightly attached, the material forming the high refractive index layer 15 is not likely to penetrate into the bottom of the portion of the epitaxial structure 9, and the portion of the epitaxial structure 9 is also not likely to warp. On the other hand, even if the material for forming the high refractive index layer 15 penetrates into the second opening 21, since the second opening 21 is recessed, the material accumulates only at the bottom of the second opening 21, and it is difficult to further extend to the bottom of the extraction structure 8. Therefore, the above arrangement can intercept the formation material of the high refractive index layer 15 more effectively, and reduce the risk of the extraction structure 8 from lifting up or even detaching to a greater extent.
Further, referring to fig. 11 again, the second opening 21 is a groove that does not penetrate through the first insulating layer 20. Compared with the case that the second opening 21 is set as a through hole structure, when the second opening 21 is a groove, the thickness of the epitaxial structure 9 deposited in the second opening 21 is small, and large loss can not be caused to the light emitted from the first opening 4.
In one embodiment, referring to fig. 5 again, the film thickness of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate 1 is d1, the film thickness of the extraction structure 8 in the direction perpendicular to the plane of the substrate 1 is d2, and d1 and d2 satisfy:
at this time, the film thickness of the epitaxial structure 9 is much smaller than that of the extraction structure 8, which not only reduces the loss of light during transmission inside the epitaxial structure 9 to a greater extent, but also has a greater height difference between the epitaxial structure 9 and the extraction structure 8, and such a greater film thickness jump between the epitaxial structure 9 and the extraction structure 8 can change the optical path difference of light reaching the color resistor 22 to a greater extent, thereby reducing diffraction to a greater extent.
Alternatively, in another embodiment, the film thickness of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate base plate 1 is d1, and d1 can satisfy: d1 is less than or equal to 1 mu m. At this time, the thickness of the epitaxial structure 9 is less than the wavelength of the visible light, the epitaxial structure 9 has the optical characteristics of a nano-film, the light transmittance of the epitaxial structure 9 is greatly improved, and the influence of the epitaxial structure 9 on the light output of the first opening 4 is weakened to a greater extent.
In one implementation, as shown in fig. 12, fig. 12 is another structural diagram of the epitaxial structure 9 provided in the embodiment of the present invention, and the film thickness of the epitaxial structure 9 in the direction perpendicular to the plane of the substrate 1 is gradually decreased along the epitaxial direction (indicated by arrow x in the figure).
Based on the above arrangement, the epitaxial structure 9 has a smaller film thickness at a position distant from the extraction structure 8 and a larger film thickness at a position close to the extraction structure 8. With the extension of the epitaxial structure 9, the position of the epitaxial structure 9 far from the extraction structure 8 tends to shield the middle region of the first opening 4, and the thickness of the film at the position of the epitaxial structure 9 far from the extraction structure 8 is made smaller, so that the loss of the epitaxial structure 9 to the light emitted from the middle region of the first opening 4 can be reduced, and the influence on the light emission from the middle region of the first opening 4 is weakened. On one hand, the gravity of the epitaxial structure 9 at the position close to the extraction structure 8 is larger by making the epitaxial structure 9 have a larger film thickness, so that the epitaxial structure 9 at the position can play a more remarkable intercepting role on the forming material of the infiltrated high-refractive-index layer 15, and the forming material is prevented from further infiltrating inwards; on the other hand, the epitaxial structure 9 at this position blocks only the edge region of the first opening 4, and since the edge region is close to the boundary between the first opening 4 and the non-opening region, even if the epitaxial structure 9 has a large film thickness and acts on light to a slightly greater extent, the luminance difference in the edge region is difficult to be recognized by human eyes.
Further, referring to fig. 12 again, along the epitaxial direction, the film thickness of the epitaxial structure 9 in the plane direction perpendicular to the substrate base plate 1 is linearly decreased, at this time, the degree of the action of the epitaxial structure 9 on light is also linearly decreased, and the light-emitting brightness of the middle region of the first opening 4 toward the edge region is uniformly and softly gradually changed under the action of the epitaxial structure 9, so that the brightness is not easily recognized by human eyes.
In an implementation manner, as shown in fig. 13, fig. 13 is a schematic structural diagram of an epitaxial structure 9 according to an embodiment of the present invention, where a surface of the epitaxial structure 9 on a side away from the substrate 1 is an uneven surface, that is, a surface of the epitaxial structure 9 on a side away from the substrate 1 is a rough surface. Wherein the surface relief of the uneven surface may be on the order of nanometers.
After the external environment light is emitted into the panel, even if part of the environment light can be reflected back by the epitaxial structure 9, the diffuse reflection can also be generated under the action of the uneven surface of the epitaxial structure 9, the reflected light is randomly transmitted along different directions, and the risk that the external environment light is visible by human eyes is reduced. Moreover, when the epitaxial structure 9 is overlapped with only a partial region of the first opening 4, the epitaxial structure 9 is located at an edge region of the first opening 4, at this time, a part of light with a large angle emitted by the light emitting layer 5 may be emitted through the epitaxial structure 9, and after the upper surface of the epitaxial structure 9 is set to be an uneven surface, the uneven surface can adjust the light path of the part of light with a large angle to a certain extent, so that the light is converted into light with a small angle, thereby realizing a light condensing effect and further improving the light emitting efficiency of the panel.
In an embodiment, as shown in fig. 14 and fig. 15, fig. 14 is a schematic structural diagram of an epitaxial structure 9 provided in an embodiment of the present invention, and fig. 15 is a schematic structural diagram of another epitaxial structure 9 provided in an embodiment of the present invention, where the epitaxial structure 9 includes a plurality of protrusions 24 protruding toward a light-emitting direction of the display panel. The protruding portions 24 may be hemispheroids, pyramids, cubes, or the like, and a surface of the protruding portions 24 on a side away from the substrate base plate 1 forms a surface of the epitaxial structure 9 on a side away from the substrate base plate 1, where the surface is an uneven surface.
In addition, referring to fig. 14 and fig. 15 again, when the epitaxial structure 9 is located on the side of the color resistor 23 opposite to the substrate 1, besides the height difference between the epitaxial structure 9 and the extraction structure 8, the epitaxial structure 9 itself also has a certain thickness difference, and this thickness difference can also change the optical path difference of the light reaching the color resistor 22, break the interference of the reflected light, and further weaken the rainbow streak phenomenon of the display panel.
In particular, when the convex portions 24 have such a stepped structure as shown in fig. 14, the film thickness between different convex portions 24 changes abruptly, the degree of change in the optical path difference is larger, and the effect of improving the rainbow-streak phenomenon is more remarkable.
It should be noted that the plurality of protruding portions 24 in the epitaxial structure 9 may be implemented by using a semi-permeable mask, or may be implemented by stacking a plurality of film layers.
Further, referring to fig. 14 and fig. 15 again, in any two of the protruding portions 24, one protruding portion 24 is a first protruding portion 25, the other protruding portion 24 is a second protruding portion 26, the first protruding portion 25 is located on a side of the second protruding portion 26 away from the extraction structure 8, and a maximum film thickness of the first protruding portion 25 in a direction perpendicular to the plane of the substrate base plate 1 is smaller than a maximum film thickness of the second protruding portion 26 in a direction perpendicular to the plane of the substrate base plate 1.
The first raised portion 25 is located on the side of the second raised portion 26 remote from the extraction structure 8, so that the first raised portion 25 is more likely to overlap the middle region of the first opening 4, while the second raised portion 26 is more likely to overlap the edge region of the first opening 4. By making the film thickness of the first opening 4 small, the degree of action of the epitaxial structure 9 on light emitted from the middle region of the first opening 4 can be reduced, and the influence on the light emission from the middle region of the first opening 4 can be weakened. The thickness of the second protruding portion 26 is made larger, so that on one hand, the gravity of the second protruding portion 26 is larger, so that the forming material of the penetrated high refractive index layer 15 can be intercepted more remarkably, and the forming material is prevented from further penetrating into the bottom of the extraction structure 8 to a greater extent; on the other hand, the second protruding portion 26 tends to block the edge region of the first opening 4, and since the edge region is close to the boundary between the first opening 4 and the non-opening region, even if the second protruding portion 26 has a large film thickness and acts on light to a slightly greater extent, the brightness difference in the edge region is difficult to be recognized by human eyes. Therefore, by adopting the arrangement mode, when the epitaxial structure 9 is utilized to effectively reduce the risk of chamfering, tilting or separating from the extraction structure 8, the epitaxial structure 9 is also prevented from causing large influence on normal display.
Further, in order to change the optical path difference of the light reaching the color resists 23 to a greater extent and further weaken the diffraction phenomenon to a greater extent, the plurality of protrusions 24 may be arranged irregularly. Specifically, as shown in fig. 16, fig. 16 is another schematic structural diagram of the epitaxial structure 9 according to the embodiment of the present invention, and the plurality of protrusions 24 are arranged at unequal intervals. Alternatively, as shown in fig. 17, fig. 17 is a schematic structural diagram of the epitaxial structure 9 provided in the embodiment of the present invention, and there is at least two protrusions 24 with different sizes. The dimensions of the protruding portion 24 can be understood as the length of the protruding portion 24 in any direction parallel to the plane of the base substrate 1.
In an embodiment, as shown in fig. 18, fig. 18 is a schematic structural diagram of an anti-reflection structure provided in the embodiment of the present invention, where the light extraction layer 7 further includes an anti-reflection structure 27 disposed in the same layer as the extraction structure 8 and the epitaxial structure 9, the anti-reflection structure 27 may be disposed in communication with the epitaxial structure 9, and a surface of the anti-reflection structure 27 on a side away from the substrate 1 is an uneven surface; an orthographic projection of antireflection structure 27 on substrate base plate 1 overlaps first opening 4, and a film thickness of antireflection structure 27 in a direction perpendicular to a plane of substrate base plate 1 is smaller than a film thickness of extraction structure 8 in a direction perpendicular to a plane of substrate base plate 1.
With the arrangement, on one hand, the diffuse reflection effect of the rough surface of the antireflection structure 27 is further utilized, so that the risk that the external environment light is visible to human eyes is reduced to a greater extent; on the other hand, when the extraction structure 8, the epitaxial structure 9 and the antireflection structure 27 are disposed on the side of the color resistor 23 away from the substrate base plate 1, the optical path lengths of a greater number of external ambient light incident into the color resistor 23 can be adjusted by the thickness difference of the antireflection structure 27 itself, so as to reduce the diffraction phenomenon to a greater extent.
Further, in order to achieve an antireflection effect for the external environment light incident in a larger area, please refer to fig. 18 again, the orthographic projections of the antireflection structure 27 and the epitaxial structure 9 on the substrate base plate 1 cover the first opening 4, and the orthographic projections of the antireflection structure 27 and the epitaxial structure 9 on the substrate base plate 1 do not overlap each other.
It should be noted that, in order to simplify the process flow of the panel, the anti-reflective structure 27 may be formed by using the same patterning process as the epitaxial structure 9 and the extraction structure 8.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, as shown in fig. 19, fig. 19 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 19 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (21)
1. A display panel, comprising:
a substrate base plate;
an anode on the substrate base plate;
a pixel defining layer positioned on a side of the anode opposite to the substrate base plate, the pixel defining layer having a first opening, and an orthographic projection of the anode on the substrate base plate overlapping the first opening;
the light-emitting layer is positioned on one side, back to the substrate base plate, of the anode and positioned in the first opening;
the cathode is positioned on one side, facing away from the substrate, of the pixel defining layer and the light emitting layer;
the light extraction layer is positioned on one side of the cathode, which is opposite to the substrate base plate, and comprises an extraction structure and a plurality of epitaxial structures which are arranged on the same layer;
wherein an orthographic projection of the extraction structure on the substrate base plate overlaps with an orthographic projection of the pixel defining layer on the substrate base plate, the epitaxial structure is communicated with the extraction structure and extends along a direction far away from the epitaxial structure, the lower surface of the epitaxial structure facing the substrate base plate is flush with the lower surface of the extraction structure facing the substrate base plate, and the orthographic projection of the epitaxial structure on the substrate base plate overlaps with a partial region of the first opening;
and the film thickness of the epitaxial structure in the plane direction perpendicular to the substrate base plate is smaller than that of the extraction structure in the plane direction perpendicular to the substrate base plate.
2. The display panel according to claim 1, further comprising:
the color film layer is positioned between the cathode and the light extraction layer and comprises a color resistor, the orthographic projection of the color resistor on the substrate is overlapped with the orthographic projection of the light emitting layer on the substrate, and the orthographic projection of the color resistor on the substrate is also overlapped with the orthographic projection of the extraction structure and the orthographic projection of the epitaxial structure on the substrate.
3. The display panel according to claim 1,
the extension structure is a closed structure which surrounds a circle along the edge of the first opening.
4. The display panel according to claim 1,
each epitaxial structure comprises a plurality of sub-epitaxial structures which are arranged along the edge of the first opening.
5. The display panel according to claim 4,
the sub-epitaxial structures are arranged at equal intervals.
6. The display panel according to claim 1,
the length of the epitaxial structure in the epitaxial direction is positively correlated with the length of the first opening overlapped with the epitaxial structure in the epitaxial direction, and the epitaxial direction is the extending direction of the epitaxial structure back to the extraction structure.
7. The display panel according to claim 1,
the length of the epitaxial structure in the epitaxial direction is positively correlated with the area of the first opening overlapped with the epitaxial structure, and the epitaxial direction is the extending direction of the epitaxial structure back to the extraction structure.
8. The display panel according to claim 1,
the display panel further comprises a first insulating layer located on one side of the light extraction layer facing the substrate base plate, the first insulating layer is provided with a plurality of second openings, and part of the epitaxial structure is recessed in the second openings.
9. The display panel according to claim 8,
the second opening is a groove which does not penetrate through the first insulating layer.
10. The display panel according to claim 1,
the film thickness of the epitaxial structure in the direction vertical to the plane of the substrate base plate is d1, the film thickness of the extraction structure in the direction vertical to the plane of the substrate base plate is d2,
11. the display panel according to claim 1,
the film thickness of the epitaxial structure in the plane direction perpendicular to the substrate base plate is d1, and d1 is not more than 1 mu m.
12. The display panel according to claim 1,
along the epitaxial direction, the epitaxial structure is in the perpendicular to the membrane thickness of substrate base plate place plane orientation reduces gradually, the epitaxial direction is the extension direction that the extraction structure was kept away from to the epitaxial structure.
13. The display panel according to claim 12,
along the epitaxial direction, the film thickness of the epitaxial structure in the direction perpendicular to the plane of the substrate base plate is linearly reduced.
14. The display panel according to claim 1,
the surface of the epitaxial structure, which is far away from one side of the substrate base plate, is an uneven surface.
15. The display panel according to claim 1,
the epitaxial structure comprises a plurality of protruding parts protruding towards the light emitting direction of the display panel.
16. The display panel according to claim 15,
in any two of the protruding portions, one protruding portion is a first protruding portion, the other protruding portion is a second protruding portion, the first protruding portion is located on one side, away from the extraction structure, of the second protruding portion, and the maximum film thickness of the first protruding portion in the plane direction perpendicular to the substrate base plate is smaller than the maximum film thickness of the second protruding portion in the plane direction perpendicular to the substrate base plate.
17. The display panel according to claim 15,
the plurality of the convex parts are arranged at unequal intervals.
18. The display panel according to claim 15,
there are at least two of the projections that differ in size.
19. The display panel according to claim 1,
the light extraction layer also comprises an antireflection structure which is arranged on the same layer as the extraction structure and the epitaxial structure, and the surface of one side of the antireflection structure, which is far away from the substrate, is an uneven surface;
the orthographic projection of the antireflection structure on the substrate base plate is overlapped with the first opening, and the film thickness of the antireflection structure in the direction perpendicular to the plane of the substrate base plate is smaller than that of the extraction structure in the direction perpendicular to the plane of the substrate base plate.
20. The display panel according to claim 19,
the orthographic projections of the antireflection structure and the epitaxial structure on the substrate cover the first opening, and the orthographic projections of the antireflection structure and the epitaxial structure on the substrate do not overlap.
21. A display device comprising the display panel according to any one of claims 1 to 20.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629214A (en) * | 2021-08-06 | 2021-11-09 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN114068843A (en) * | 2021-11-05 | 2022-02-18 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN114361359A (en) * | 2021-12-29 | 2022-04-15 | 武汉天马微电子有限公司 | Display panel and display device |
| WO2023205920A1 (en) * | 2022-04-24 | 2023-11-02 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display device |
| WO2024000300A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146354A (en) * | 2018-11-05 | 2020-05-12 | 三星显示有限公司 | Flexible display device |
| CN111725429A (en) * | 2020-06-30 | 2020-09-29 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN111864105A (en) * | 2020-07-09 | 2020-10-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN111883684A (en) * | 2020-08-07 | 2020-11-03 | 湖北长江新型显示产业创新中心有限公司 | Organic light-emitting display panel and display device |
| CN112186007A (en) * | 2019-07-02 | 2021-01-05 | 三星显示有限公司 | Display device |
| CN112216726A (en) * | 2019-07-11 | 2021-01-12 | 三星显示有限公司 | Display device |
| CN112397548A (en) * | 2019-08-13 | 2021-02-23 | 三星显示有限公司 | Display device |
| CN112447801A (en) * | 2019-09-04 | 2021-03-05 | 三星显示有限公司 | Display device |
-
2021
- 2021-03-31 CN CN202110349121.7A patent/CN113097278B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146354A (en) * | 2018-11-05 | 2020-05-12 | 三星显示有限公司 | Flexible display device |
| CN112186007A (en) * | 2019-07-02 | 2021-01-05 | 三星显示有限公司 | Display device |
| CN112216726A (en) * | 2019-07-11 | 2021-01-12 | 三星显示有限公司 | Display device |
| CN112397548A (en) * | 2019-08-13 | 2021-02-23 | 三星显示有限公司 | Display device |
| CN112447801A (en) * | 2019-09-04 | 2021-03-05 | 三星显示有限公司 | Display device |
| CN111725429A (en) * | 2020-06-30 | 2020-09-29 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN111864105A (en) * | 2020-07-09 | 2020-10-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN111883684A (en) * | 2020-08-07 | 2020-11-03 | 湖北长江新型显示产业创新中心有限公司 | Organic light-emitting display panel and display device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629214A (en) * | 2021-08-06 | 2021-11-09 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN113629214B (en) * | 2021-08-06 | 2023-12-26 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN114068843A (en) * | 2021-11-05 | 2022-02-18 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN114068843B (en) * | 2021-11-05 | 2023-12-22 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN114361359A (en) * | 2021-12-29 | 2022-04-15 | 武汉天马微电子有限公司 | Display panel and display device |
| CN114361359B (en) * | 2021-12-29 | 2023-10-27 | 武汉天马微电子有限公司 | Display panel and display device |
| WO2023205920A1 (en) * | 2022-04-24 | 2023-11-02 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display device |
| WO2024000300A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
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|---|---|
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