CN113078193B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113078193B CN113078193B CN202110314491.7A CN202110314491A CN113078193B CN 113078193 B CN113078193 B CN 113078193B CN 202110314491 A CN202110314491 A CN 202110314491A CN 113078193 B CN113078193 B CN 113078193B
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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
- 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
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
Abstract
The present invention provides a display panel and a display device, including: a substrate; a light emitting array layer on one side of the substrate; the light emitting array layer comprises a plurality of light emitting units; the light emitting unit is at least partially positioned in the opening region of the pixel defining layer; the micro-lens layer is positioned on one side of the light-emitting array layer, which is far away from the substrate; the microlens layer includes a plurality of microlenses; the orthographic projection of the micro lens on the substrate is positioned between the orthographic projections of the two adjacent light-emitting units; the micro lens comprises a first part and a second part, wherein the first part is at least partially positioned inside the second part; the first part is at least partially positioned on one side of the micro-lens layer facing the light-emitting array layer, and the refractive index of the first part is larger than that of the second part, so that the total reflection phenomenon of light rays on one side of the micro-lens layer facing the light-emitting array layer is reduced, the light extraction rate of the display panel is improved, and the light-emitting efficiency of the display panel and the light-emitting efficiency of the display device are improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the continuous development of science and technology, the OLED (Organic Light-Emitting diode) display panel has the advantages of self-luminescence, wide viewing angle, high contrast, and low power consumption, and is widely applied to intelligent electronic products such as mobile phones, digital video cameras, and notebook computers.
However, since the light emitting device of the OLED display panel is usually covered with other film layers, light generated by the light emitting device needs to pass through other film layers to be emitted to the outside of the display panel. However, due to the difference in optical properties of different film materials, light may be lost in the display panel in the form of total reflection, which results in low light extraction efficiency and affects the light emitting efficiency of the OLED display panel.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device to reduce total reflection loss of light inside the display panel.
In order to achieve the purpose, the invention provides the following technical scheme:
a display panel, comprising:
a substrate;
a light emitting array layer on one side of the substrate; the light emitting array layer comprises a plurality of light emitting units; the light emitting unit is at least partially positioned in the opening region of the pixel defining layer;
the micro-lens layer is positioned on one side, away from the substrate, of the light-emitting array layer; the microlens layer includes a plurality of microlenses; the orthographic projection of the micro lens on the substrate is positioned between the orthographic projections of the two adjacent light-emitting units;
the microlens comprises a first portion and a second portion, the first portion being at least partially located inside the second portion; the first portion is at least partially located on a side of the microlens layer facing the light emitting array layer, and has a refractive index greater than that of the second portion.
A display device comprising a display panel as claimed in any one of the above.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the display panel and the display device provided by the invention, because the orthographic projection of the micro lens on the substrate is positioned between the orthographic projections of the two adjacent light-emitting units, the large-angle light emitted by the light-emitting units can be reflected or refracted into small-angle light through the micro lens, so that the problem of color mixing caused by the incidence of the large-angle light into the adjacent light-emitting units is avoided.
Moreover, the micro lens comprises a first part and a second part, the first part is at least partially positioned on one side of the micro lens layer facing the light-emitting array layer, and the refractive index of the first part is greater than that of the second part, so that the refractive index of the area of the micro lens part can be improved through the first part, the total reflection phenomenon of light rays on one side of the micro lens layer facing the light-emitting array layer is reduced, the light extraction rate of the display panel is improved, and the light-emitting efficiency of the display panel and the display device is improved.
In addition, because the refractive indexes of the first part and the second part are different, namely the refractive index of the first part is larger than that of the second part, the light path of the light with large angle can be further changed, and the problem of color mixing caused by the incidence of the light with large angle into the adjacent light-emitting units is further avoided.
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 schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the display panel shown in FIG. 1 along a cutting line AA';
fig. 3 is a schematic top view of a single light-emitting unit according to another embodiment of the present invention;
fig. 4 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;
fig. 5 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;
fig. 6 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 8 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 9 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 10 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 11 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 12 is a schematic cross-sectional view of a display panel according to another embodiment of the invention;
fig. 13 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 14 is a schematic cross-sectional view of a display panel according to another embodiment of the invention;
fig. 15 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, so that the above is the core idea of the present invention, and the above objects, features and advantages of the present invention can be more clearly understood. 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 embodiment of the invention provides a display panel, which is an LED display panel or an OLED display panel and the like.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic top view structure diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional structure diagram of the display panel shown in fig. 1 along a cutting line AA', the display panel including:
a substrate 10;
a light emitting array layer 20 on one side of the substrate 10; the light emitting array layer 20 includes a plurality of light emitting cells 201; the light emitting unit 201 is at least partially located in the opening area of the pixel defining layer 202;
a microlens layer 30 on a side of the light emitting array layer 20 facing away from the substrate 10; the microlens layer 30 includes a plurality of microlenses 301; the orthographic projection of the micro lens 301 on the substrate 10 is positioned between the orthographic projections of the two adjacent light-emitting units;
the microlens 301 includes a first portion 3011 and a second portion 3012, the first portion 3011 being at least partially located inside the second portion 3012; the first portion 3011 is at least partially located on a side of the microlens layer 301 facing the light emitting array layer 20, and the refractive index of the first portion 3011 is greater than the refractive index of the second portion 3012.
In the embodiment of the present invention, since the orthographic projection of the microlens 301 on the substrate 10 is located between the orthographic projections of the two adjacent light-emitting units 201, the microlens 301 can reflect and/or refract the light emitted by the light-emitting units 201 with a large angle into light with a small angle, so as to avoid the problem of color mixing when the light with a large angle enters the adjacent light-emitting units 201.
The light with a large angle is light with a large included angle between the outgoing direction of the light and the direction perpendicular to the substrate 10, and the light with a small angle is light with a small included angle between the outgoing direction of the light and the direction perpendicular to the substrate 10. Moreover, the light with a large angle is emitted towards the adjacent light-emitting units 201, and when the colors of the light rays emitted by the two adjacent light-emitting units 201 are different, a color mixing phenomenon occurs, which affects the color development effect of the adjacent light-emitting units 201; the light with a small angle is emitted to the upper side of the light emitting unit 201, and is not easy to mix with the adjacent light emitting unit 201.
Moreover, since the microlens 301 includes the first portion 3011 and the second portion 3012, the first portion 3011 is at least partially located inside the second portion 3012, the first portion 3011 is at least partially located on the side of the microlens layer 30 facing the light emitting array layer 20, and the refractive index of the first portion 3011 is greater than that of the second portion 3012, it is possible to increase the refractive index of the microlens 301 region through the first portion 3011, reduce the total reflection phenomenon of light rays on the side of the microlens layer 30 facing the light emitting array layer 20, that is, reduce the total reflection loss of light rays on the side of the microlens layer 30 facing the light emitting array layer 20, improve the light extraction rate of the display panel, and improve the light emitting efficiency of the display panel and the display device.
In addition, since the refractive indexes of the first portion 3011 and the second portion 3012 are different, that is, the refractive index of the first portion 3011 is greater than that of the second portion 3012, the optical path of the light with a large angle can be further changed, and the problem of color mixing when the light with a large angle enters the adjacent light-emitting unit 201 can be further avoided.
In some embodiments of the present invention, as shown in fig. 1, the orthographic projection shape of the first portion 3011 on the substrate 10 is a quadrilateral, and the first portion 3011 and the second portion 3012 are disposed around the light emitting unit 201, but the present invention is not limited thereto, and in other embodiments, as shown in fig. 3, fig. 3 is a schematic top view structure diagram of a single light emitting unit 201 according to another embodiment of the present invention, the orthographic projection shape of the first portion 3011 on the substrate 10 may also be a circle, and the single first portion 3011 may not be disposed around the light emitting unit 201. In addition, the shape of the orthographic projection of the first portion 3011 on the substrate 10 can also be hexagonal, etc., and is not described herein.
In some embodiments of the present invention, as shown in fig. 2, the light emitting array layer 20 includes a buffer layer 203, a TFT array layer 204, a light emitting unit 201, and a pixel defining layer 202 on the substrate 10. The TFT array layer 204 at least includes a driving transistor T, the driving transistor T includes a gate T1, a source T2, a drain T3, and an active layer, the gate T1 is connected to a scan line of the display panel, the source T2 is connected to a data line of the display panel, the drain T3 is connected to an anode 2011 of the light emitting unit 201, and a light emitting functional layer 2012 of the light emitting unit 201 is located between the anode 2011 and the cathode 2013.
Wherein, the microlens layer 30 is located at a side of the cathode 2013 facing away from the substrate 10, that is, the microlens layer 30 is located at a side of the light emitting array layer 20 facing away from the substrate 10. Of course, the present invention is not limited thereto, and in some embodiments, as shown in fig. 4, fig. 4 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention, the display panel further includes an encapsulation layer 40 located on a side of the light emitting array layer 20 facing away from the substrate 10, and the microlens layer 30 is located on a side of the encapsulation layer 40 facing away from the substrate 10. Optionally, the encapsulation layer 40 includes a first sub-encapsulation layer 401 and a second sub-encapsulation layer 402 alternately arranged in a direction perpendicular to the substrate 10, where the first sub-encapsulation layer 401 is an inorganic layer and the second sub-encapsulation layer 402 is an organic layer.
In other embodiments, as shown in fig. 5, fig. 5 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention, the display panel further includes a touch electrode layer 50, the touch electrode layer 50 is located on a side of the encapsulation layer 40 away from the substrate 10, and the microlens layer 30 is located on a side of the touch electrode layer 50 away from the substrate 10, or the touch electrode layer 50 is located on a side of the microlens layer 30 close to the substrate 10.
That is to say, in the embodiment of the present invention, the microlens layer 30 may be located on a side of the light emitting array layer 20 away from the substrate 10, on a side of the encapsulation layer 40 away from the substrate 10, or on a side of the touch electrode layer 50 away from the substrate 10. Of course, in other embodiments, if the side of the light emitting array layer 20 away from the substrate 10 further has a color resistance layer, the microlens layer 30 may also be located on the side of the color resistance layer away from the substrate 10, which is not described herein again.
In some embodiments of the present invention, only one side of the microlens layer 30 close to the substrate 10 is taken as the touch electrode layer 50 for illustration. The touch electrode layer 50 includes a plurality of touch electrodes 501, an orthogonal projection of the touch electrode 501 on the substrate 10 is located between orthogonal projections of two adjacent light-emitting units 201, and the micro lens 301 at least partially covers the touch electrodes 501. For example, the touch electrode 501 is a grid-shaped metal electrode, and the touch electrode 501 is located in the gap between the light emitting units 201 to prevent the touch electrode 501 from affecting the light emitting efficiency of the light emitting units 201.
Of course, as shown in fig. 5, the touch electrode layer 50 further includes a touch buffer layer 502, a touch lead 503 and a touch insulating layer 504, the touch electrode 501 is electrically connected to the touch lead 503 through a via hole, and the touch electrode 501 and the touch lead 503 are insulated from each other by the touch insulating layer 504. In the embodiment of the present invention, the touch electrode 501 is covered by the micro lens 301, but the present invention is not limited thereto, and in other embodiments, an insulating layer or a planarization layer may be further disposed between the touch electrode 501 and the micro lens 301.
Note that, if the microlens 301 includes only the second portion 3012, and the refractive index of the second portion 3012 is smaller than the refractive index of the touch insulating layer 504, light is easily totally reflected at the interface between the touch insulating layer 504 and the microlens 301. It will be appreciated that total reflection occurs if light is incident on a medium of lower refractive index from a medium of higher refractive index. Therefore, in the embodiment of the present invention, the microlens 301 includes the first portion 3011 and the second portion 3012, and the refractive index of the first portion 3011 is greater than the refractive index of the second portion 3012, that is, the refractive index of part of the microlens 301 is increased by the first portion 3011, so that the refractive index loss at the interface between the touch insulating layer 504 and the microlens 301 is reduced.
Optionally, the refractive index of the first portion 3011 is not less than the refractive index of the touch insulating layer 504, so as to minimize the refractive index loss at the interface between the touch insulating layer 504 and the microlens 301. Of course, when the side of the microlens 301 close to the substrate 10 is the encapsulation layer 50, the refractive index of the first portion 3011 is not less than the refractive index of the encapsulation layer 50. That is, the refractive index of the first portion 3011 is not smaller than that of the film layer on the side of the microlens 301 close to the substrate 10.
Note that the first portion 3011 at least partially located on the side of the microlens layer 30 facing the light emitting array layer 20 means: the surface of the first portion 3011 facing the light emitting array layer 20 is at least partially in direct contact with the touch insulation layer 504, and the surface of the second portion 3012 facing the light emitting array layer 20 is at least partially in direct contact with the touch insulation layer 504, so that the interface between the touch insulation layer 504 and the microlens layer 30 is an interface between the first portion 3011 and the touch insulation layer 504, and the other portion is an interface between the second portion 3012 and the touch insulation layer 504. Since the refractive index of the first portion 3011 is larger, that is, the refractive index of the first portion 3011 is closer to that of the touch insulating layer 504 than that of the second portion 3012, the total reflection phenomenon at the interface between the first portion 3011 and the touch insulating layer 504 can be reduced, and the total reflection phenomenon at the interface between the microlens layer 30 and the touch insulating layer 504 can be reduced.
In some embodiments of the present invention, as shown in fig. 5 or fig. 6, fig. 6 is a schematic cross-sectional structural diagram of a display panel according to another embodiment of the present invention, in which the microlens 301 includes at least one first portion 3011 and one second portion 3012, and the second portion 3012 covers at least one first portion 3011.
That is, at least one first portion 3011 is located on the surface of the light emitting array layer 20, and a second portion 3012 is located on the surface of the at least one first portion 3011 and covers a predetermined area around the at least one first portion 3011. When the first portions 3011 are plural, the second portions 3012 cover gaps between adjacent first portions 3011. It should be noted that, in the manufacturing process, at least one first portion 3011 may be formed on the surface of the light emitting array layer 20, and then a second portion 3012 may be formed on the surface of the first portion 3011.
As shown in fig. 5, the microlens 301 includes a plurality of first portions 3011 and one second portion 3012, and the second portion 3012 covers the plurality of first portions 3011. Of course, the invention is not limited in this regard and in other embodiments, as shown in FIG. 6, the microlens 301 may further include a first portion 3011 and a second portion 3012, and the second portion 3012 may cover the first portion 3011.
It should be noted that, while the second portion 3012 covers at least one first portion 3011, at least one first portion 3011 is required to be located inside the second portion 3012, so that the second portion 3012 is closer to the light emitting unit 201 than the first portion 3011, so that, while the total reflection loss is reduced by the first portion 3011, the second portion 3012 closer to the light emitting unit 201 can perform a refraction and/or reflection function on light with a large angle, so as to reduce the problem of color mixing of the adjacent light emitting units 201.
On this basis, in some embodiments of the present invention, as shown in fig. 5, the surfaces of the first portion 3011 and the second portion 3012 on the side facing away from the substrate 10 are both first curved surfaces, where the first curved surfaces are convex in a direction away from the substrate, that is, the surfaces of the first portion 3011 and the second portion 3012 on the side facing away from the substrate 10 are both convex surfaces. Optionally, the radius of curvature of the second portion 3012 is greater than the radius of curvature of the first portion 3011.
Alternatively, in another embodiment of the present invention, as shown in fig. 7, fig. 7 is a schematic cross-sectional structure of a display panel according to another embodiment of the present invention, a surface of the first portion 3011 on a side away from the substrate 10 is a first curved surface, and a surface of the second portion 3012 on a side away from the substrate 10 is a second curved surface, where the first curved surface protrudes in a direction away from the substrate, and the second curved surface is opposite to the protruding direction of the first curved surface, that is, a surface of the first portion 3011 on a side away from the substrate 10 is a protruding surface, and a surface of the second portion 3012 on a side away from the substrate 10 is a recessed surface.
Of course, the present invention is not limited thereto, and in other embodiments, the surfaces of the first portion 3011 and the second portion 3012 on the side away from the substrate 10 may also be both the second curved surfaces, that is, the surfaces of the first portion 3011 and the second portion 3012 on the side away from the substrate 10 may also be both the concave surfaces, and are not described herein again.
It should be noted that, in different application scenarios, the shapes of the surfaces of the first portion 3011 and the second portion 3012 on the side away from the substrate 10 may be different, such as a convex surface or a concave surface, so that the convex or concave surface is used to adjust the light path of the emergent light, improve the light-emitting efficiency, and avoid the problems of color mixing and the like.
In other embodiments of the present invention, as shown in fig. 8 or fig. 9, fig. 8 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, and fig. 9 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, where the microlens 301 includes at least one first portion 3011 and at least one second portion 3012, and the second portions 3012 and the first portions 3011 are arranged in a staggered manner in a direction parallel to the substrate 10, and any first portion 3011 is located between two adjacent second portions 3012.
As shown in fig. 8, the microlens 301 includes a first portion 3011 and a second portion 3012, the second portion 3012 and the first portion 3011 are arranged alternately in a direction parallel to the substrate 10, and the first portion 3011 is located between two adjacent second portions 3012. As shown in fig. 9, the microlens 301 includes a plurality of first portions 3011 and a plurality of second portions 3012, the second portions 3012 and the first portions 3011 are arranged alternately in a direction parallel to the substrate 10, and any first portion 3011 is located between two adjacent second portions 3012.
Since any first portion 3011 is located between two adjacent second portions 3012, it can be considered that the first portion 3011 is located inside the second portion 3012, so that the second portion 3012 is closer to the light emitting unit 201 than the first portion 3011, and further, while the total reflection loss is reduced by the first portion 3011, the second portion 3012 closer to the light emitting unit 201 can perform a refraction and/or reflection function on light of a large angle, so as to reduce the problem of color mixing of the adjacent light emitting units 201.
In some embodiments of the present invention, as shown in fig. 9, a distance between a geometric center of an orthographic projection of the light emitting unit 201 on the substrate 10 and a geometric center of an orthographic projection of the nearest first portion 3011 on the substrate 10 is d1, and a distance between a geometric center of an orthographic projection of the light emitting unit 201 on the substrate 10 and a geometric center of an orthographic projection of the nearest second portion 3012 on the substrate 10 is d2, where d1 > d2, so as to make the second portion 3012 closer to the light emitting unit 201 than the first portion 3011. Optionally, the distance d3 from the second portion 3012 to the edge of the light emitting unit 201 is less than or equal to 5um.
On the basis, in some embodiments of the invention, as shown in fig. 10, fig. 10 is a schematic cross-sectional structure of a display panel according to another embodiment of the invention, in a direction perpendicular to the substrate 10, a height L1 of the first portion 3011 is greater than or equal to a height L2 of the second portion 3012, so as to further improve the light extraction efficiency of the microlens 301 in some application scenarios.
On this basis, in some embodiments of the present invention, as shown in fig. 9, a surface of the microlens 301 on a side away from the substrate 10 includes a first surface S1 and a second surface S2, the second surface S2 surrounds the first surface S1, the first surface S1 is a plane, a first curved surface or a second curved surface, and the second surface S2 is a first curved surface or a plane; the first curved surface is convex towards the direction far away from the substrate 10, and the second curved surface is opposite to the convex direction of the first curved surface.
As shown in fig. 9, the first surface S1 is a plane, and the second surface S2 is a first curved surface, or, as shown in fig. 11, fig. 11 is a schematic cross-sectional structure of a display panel according to another embodiment of the present invention, where the first surface S1 is a plane, and the second surface S2 is a plane, or, as shown in fig. 12, fig. 12 is a schematic cross-sectional structure of a display panel according to another embodiment of the present invention, where the first surface S1 is a first curved surface and the second surface S2 is a first curved surface, or, as shown in fig. 13, fig. 13 is a schematic cross-sectional structure of a display panel according to another embodiment of the present invention, where the first surface S1 is a second curved surface, and the second surface S2 is a first curved surface.
Similarly, under different application scenarios, the shapes of the first surface S1 and the second surface S2 may be set as required, such as a convex surface or a concave surface, so as to adjust the light path of the emergent light by using the convex or concave surface, improve the light-emitting efficiency, and avoid the problems of color mixing and the like.
In some embodiments of the present invention, as shown in fig. 13, the number of the second portions 3012 on one side of the touch electrode 501 is greater than the number of the second portions 3012 on the other side of the touch electrode 501, or the number of the first portions 3011 on one side of the touch electrode 501 is greater than the number of the first portions 3011 on the other side of the touch electrode 501. However, the present invention is not limited thereto, and in other embodiments, the number of the second portions 3012 on one side of the touch electrode 501 may be equal to the number of the second portions 3012 on the other side of the touch electrode 501, and the number of the first portions 3011 on one side of the touch electrode 501 may be equal to the number of the first portions 3011 on the other side of the touch electrode 501.
In some embodiments of the present invention, as shown in FIG. 13, microlens layer 30 further includes an index-matching planarization layer 302; an index-matching planarization layer 302 is located on the side of the microlens 301 facing away from the substrate; the refractive index of the refractive index-matched planarization layer 302 is greater than or equal to the refractive index of the first portion 3011, so that light with a large angle is converted into light with a small angle through the refraction and/or reflection action of the refractive index-matched planarization layer 302, the total reflection loss is reduced, and the light extraction efficiency is improved.
On the basis, in some embodiments of the present invention, as shown in fig. 14, fig. 14 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, and a material of the planarization layer 302 with matched refractive index is the same as a material of the first portion 3011, and based on this, the first portion 3011 and the planarization layer 302 with matched refractive index can be simultaneously formed after the second portion 3012 is formed, so that steps can be simplified and process cost can be saved.
In some embodiments of the present invention, as shown in fig. 1, the microlenses 301 are disposed around the light emitting cells 201, and the number of first portions 3011 within the microlenses 301 surrounding the light emitting cells 201 of different colors is different; the number of the first portions 3011 in the microlenses 301 surrounding the light emitting cells 201 of the same color is the same. Since the light emitting units 201 of different colors have different light emitting efficiencies, the number of the first portions 3011 in the microlens 301 may be set according to the light emitting efficiency of the light emitting unit 201, so that the microlens 301 can more effectively improve the light emitting efficiency of the light emitting unit 201.
In some embodiments of the present invention, the light emitting unit 201 includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit; the microlenses 301 include a first microlens disposed around the blue light emitting cell, a second microlens disposed around the red light emitting cell, and a third microlens disposed around the green light emitting cell; the number of the first parts in the first micro-lens is larger than that of the first parts in the second micro-lens; the number of first portions in the second microlens is larger than the number of first portions in the third microlens. Of course, the present invention is not limited thereto, and in practical applications, the number of the first portions in the micro-lens may be set according to the color and the ratio of the actual light emitting unit 301.
The embodiment of the invention also provides a display device which comprises the display panel provided by any one of the above embodiments. As shown in fig. 15, fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device P includes, but is not limited to, a full-screen mobile phone, a tablet computer, a digital camera, and the like.
It should be noted that, in the embodiment of the present invention, only the display panel is taken as the OLED display panel for illustration, but the present invention is not limited thereto, and in other embodiments, the display panel may also be an LED display panel or the like.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. 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 (15)
1. A display panel, comprising:
a substrate;
a light emitting array layer on one side of the substrate; the light emitting array layer comprises a plurality of light emitting units; the light emitting unit is at least partially positioned in the opening region of the pixel defining layer;
the micro-lens layer is positioned on one side, away from the substrate, of the light emitting array layer; the microlens layer includes a plurality of microlenses; the orthographic projection of the micro lens on the substrate is positioned between the orthographic projections of the two adjacent light-emitting units;
the microlens comprises a first portion and a second portion, the first portion being at least partially located inside the second portion; the first portion is at least partially located on a side of the microlens layer facing the light emitting array layer, and has a refractive index greater than that of the second portion;
the microlens layer further comprises an index-matching planarization layer; the refractive index matched planarization layer is positioned on one side of the micro lens, which faces away from the substrate; the index-matched planarization layer has an index of refraction greater than or equal to the index of refraction of the first portion.
2. The display panel according to claim 1, wherein the microlens comprises at least one of the first portion and one of the second portion;
the second portion covers the at least one first portion.
3. The display panel according to claim 2, wherein surfaces of the first portion and the second portion on a side facing away from the substrate are both first curved surfaces;
or the surface of one side of the first part, which is far away from the substrate, is a first curved surface, and the surface of one side of the second part, which is far away from the substrate, is a second curved surface;
the first curved surface protrudes towards the direction far away from the substrate, and the protruding direction of the second curved surface is opposite to that of the first curved surface.
4. The display panel of claim 1, wherein the microlenses comprise at least one first portion and at least one second portion;
the second portions and the first portions are alternately arranged in a direction parallel to the substrate, and any one of the first portions is located between two adjacent second portions.
5. The display panel according to claim 4, wherein a height of the first portion is greater than or equal to a height of the second portion in a direction perpendicular to the substrate.
6. The display panel according to claim 4, wherein the surface of the microlens on the side facing away from the substrate comprises a first surface and a second surface, the second surface surrounds the first surface, the first surface is a flat surface, a first curved surface or a second curved surface, and the second surface is a first curved surface or a flat surface;
the first curved surface protrudes towards the direction far away from the substrate, and the protruding direction of the second curved surface is opposite to that of the first curved surface.
7. The display panel according to claim 4, wherein a distance between a geometric center of an orthographic projection of the light emitting unit on the substrate and a geometric center of an orthographic projection of the nearest first portion on the substrate is d1, and a distance between a geometric center of an orthographic projection of the light emitting unit on the substrate and a geometric center of an orthographic projection of the nearest second portion on the substrate is d2, wherein d1 > d2.
8. The display panel according to claim 7, wherein a distance from the second portion to an edge of the light emitting unit is less than or equal to 5um.
9. The display panel of claim 1, wherein the material of the index-matched planarization layer is the same as the material of the first portion.
10. The display panel according to claim 1, further comprising a touch electrode layer; the touch electrode layer is positioned on one side of the micro-lens layer close to the substrate;
the touch electrode layer comprises a plurality of touch electrodes, orthographic projections of the touch electrodes on the substrate are located between orthographic projections of two adjacent light-emitting units, and the micro lenses at least partially cover the touch electrodes.
11. The display panel according to claim 10, wherein the number of the second portions on one side of the touch electrode is larger than the number of the second portions on the other side of the touch electrode in a direction parallel to the surface of the substrate and directed to the light-emitting unit by the touch electrode.
12. The display panel according to claim 1, wherein an orthographic projection of the first portion on the substrate has a shape of a circle, a quadrangle, or a hexagon.
13. The display panel according to claim 1, wherein the microlens is provided around the light emitting unit;
the number of first portions in the microlenses surrounding the light emitting cells of different colors is different;
the number of first portions in the microlenses surrounding the light emitting cells of the same color is the same.
14. The display panel according to claim 13, wherein the light-emitting units include a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; the microlenses include a first microlens disposed around the blue light emitting cell, a second microlens disposed around the red light emitting cell, and a third microlens disposed around the green light emitting cell;
the number of the first parts in the first micro-lens is larger than that of the first parts in the second micro-lens;
the number of the first portions in the second micro-lens is larger than the number of the first portions in the third micro-lens.
15. A display device comprising the display panel according to any one of claims 1 to 14.
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