CN114122297A

CN114122297A - Display panel and display device

Info

Publication number: CN114122297A
Application number: CN202111444753.8A
Authority: CN
Inventors: 汪顺; 郑爽; 何雨濛; 杨炳伟; 李哲
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-01

Abstract

The invention discloses a display panel and a display device, relates to the technical field of display, and can improve the light emitting effect of the front side of the display panel and improve the display effect of the display panel. The display panel includes a substrate, a plurality of light emitting devices, at least one collimating structure, and a filling layer. Each collimating structure corresponds to a light emitting device. The collimation structure comprises a first columnar body and a plurality of second columnar bodies, the second columnar bodies are arranged around the first columnar body, and the orthographic projection of the first columnar body on the substrate is at least partially overlapped with the orthographic projection of the light emitting area of the corresponding light emitting device on the substrate. The filling layer is positioned on one side of the plurality of light-emitting devices far away from the substrate, and at least fills gaps between the first columnar bodies, the second columnar bodies and the two adjacent second columnar bodies; the refractive index of the filling layer is greater than that of the first columnar body and the second columnar body. The display panel is applied to a display device so that the display device displays a picture.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a display device.

Background

Organic Light-Emitting Diode (OLED) display panels gradually become one of the mainstream of the display field by virtue of their excellent properties of low power consumption, high color saturation, wide viewing angle, thin thickness, and being capable of realizing flexibility, and the OLED display panels can be widely applied to terminal products such as smart phones, tablet computers, televisions, and the like.

Disclosure of Invention

Some embodiments of the present invention provide a display panel and a display device, which are used to improve a light emitting effect of a front surface of the display panel, so as to improve a display effect of the display panel.

In order to achieve the above object, some embodiments of the present invention provide the following technical solutions:

in one aspect, a display panel is provided that includes a substrate, a plurality of light emitting devices, at least one collimating structure, and a fill layer. A plurality of light emitting devices on the substrate; at least one collimating structure located on a side of the plurality of light emitting devices remote from the substrate; each collimating structure corresponds to one light emitting device; the collimating structure comprises a first columnar body and a plurality of second columnar bodies, the second columnar bodies are arranged around the first columnar body, and the orthographic projection of the first columnar body on the substrate at least partially overlaps with the orthographic projection of the light emitting area of the corresponding light emitting device on the substrate; the filling layer is positioned on one side, away from the substrate, of the plurality of light-emitting devices, and at least fills gaps between the first columnar bodies and the second columnar bodies in the collimation structure and gaps between two adjacent second columnar bodies; the refractive index of the filling layer is greater than the refractive indices of the first columnar body and the second columnar body.

In some embodiments, an orthographic projection of the first cylinder on the substrate is circular, and an orthographic projection of the second cylinder on the substrate is circular.

In some embodiments, an orthographic projection of the first cylinder on the substrate is a first circle, and an orthographic projection of the second cylinder on the substrate is a second circle, and a diameter of the first circle is larger than a diameter of the second circle.

In some embodiments, the center of the first circle is equidistant from the center of each of the second circles; and/or the distance between the centers of two adjacent second circles is equal.

In some embodiments, the difference between the refractive index of the filling layer and the refractive index of the first columnar body and the second columnar body is greater than or equal to 0.1.

In some embodiments, the first and second pillars have an equal refractive index.

In some embodiments, one or more circles of the second cylindrical body are arranged around the first cylindrical body.

In some embodiments, along a direction perpendicular to the substrate, a height of the first pillar is the same as a height of the fill layer, and a height of the second pillar is the same as a height of the fill layer.

In some embodiments, the display panel further comprises an encapsulation layer. The packaging layer is positioned on one side of the plurality of light-emitting devices far away from the substrate; the at least one alignment structure is located on a side of the encapsulation layer away from the substrate.

In another aspect, a display device is provided, which includes the display panel according to any one of the above embodiments.

In another aspect, a method for manufacturing a display panel is provided, including:

a plurality of light emitting devices are formed on a substrate.

Forming at least one collimating structure on a side of the plurality of light emitting devices away from the substrate; each collimating structure corresponds to one light emitting device; the collimating structure comprises a first columnar body and a plurality of second columnar bodies, the second columnar bodies are arranged around the first columnar body, and the orthographic projection of the first columnar body on the substrate at least partially overlaps with the orthographic projection of the light emitting area of the corresponding light emitting device on the substrate.

Forming a filling layer on one side of the plurality of light-emitting devices far away from the substrate; the filling layer at least fills a gap between the first columnar body and the second columnar body in the collimation structure and a gap between two adjacent second columnar bodies; the refractive index of the filling layer is greater than the refractive indices of the first columnar body and the second columnar body.

The display panel, the manufacturing method thereof and the display device provided by some embodiments of the invention have the following beneficial effects:

some embodiments of the present invention provide a display panel, in which a filling layer and at least one collimating structure are disposed on a side of the light emitting device away from the substrate, the collimating structure includes a first columnar body and a plurality of second columnar bodies, and a refractive index of the filling layer is greater than refractive indices of the first columnar body and the second columnar body, so that a light path perpendicular to the substrate can be formed on the side of the light emitting device away from the substrate by using a photonic band gap effect. Therefore, when the light emitting device emits light, most of light emitted by the light emitting device can be limited in the light path and is transmitted towards the direction far away from the substrate along the light channel, namely, is emitted from the front surface of the display panel, so that the light output quantity of the front surface of the display panel can be increased, the front light output effect of the display panel is improved, and the display effect of the display panel is further improved.

The beneficial effects that can be achieved by the display panel and the manufacturing method of the display panel provided by some embodiments of the invention are the same as those achieved by the display panel described in any of the embodiments, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in some embodiments of the present invention will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, according to embodiments of the present invention.

FIG. 1 is a block diagram of a display panel according to some embodiments;

FIG. 2A is a top view of a display panel according to some embodiments;

FIG. 2B is a cross-sectional view of the display panel provided in FIG. 2A at A-A';

FIG. 3 is a top view of another display panel according to some embodiments;

FIG. 4A is a top view of a collimating structure according to some embodiments;

FIG. 4B is a top view of another collimating structure according to some embodiments;

FIG. 4C is a top view of yet another collimating structure according to some embodiments

FIG. 5 is a top view of yet another collimating structure according to some embodiments;

FIG. 6 is a block diagram of a display panel according to some embodiments;

FIG. 7 is a block diagram of another display panel according to some embodiments;

FIG. 8 is a block diagram of yet another display panel according to some embodiments;

FIG. 9 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 10 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 11 is a flow chart of a method of fabricating a display panel according to some embodiments;

FIG. 12 is a block diagram of a display device according to some embodiments.

Detailed Description

The technical solutions in some embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present invention belong to the protection scope of the present invention.

Unless the context requires otherwise, throughout the specification and claims, the word "comprise", and other forms thereof, such as the third person's singular form "comprising" and the present participle form "comprising", are to be construed in an open, inclusive sense, i.e. as "including, but not limited to". In the description herein, the terms "one embodiment," "some embodiments," "example," "certain examples," or "some examples" or the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specified.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

As used herein, "about," "approximately," or "approximately" includes the stated values as well as average values that are within an acceptable range of deviation for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system).

As used herein, "parallel," "perpendicular," and "equal" include the stated case and cases that approximate the stated case to within an acceptable range of deviation as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where an acceptable deviation from approximately parallel may be, for example, within 5 °; "perpendicular" includes absolute perpendicular and approximately perpendicular, where an acceptable deviation from approximately perpendicular may also be within 5 °, for example. "equal" includes absolute and approximate equality, where the difference between the two, which may be equal within an acceptable deviation of approximately equal, is less than or equal to 5% of either.

It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

As shown in fig. 1, in the related art, a display panel 01 includes a substrate 1 and a plurality of light emitting devices 2 disposed on the substrate 1. The light L emitted by the light emitting device 2 is emitted in all directions, so that when the display panel 01 is used to display a picture, the light emitted from the front surface of the display panel 01 is only a part of the light L emitted by the light emitting device 2, and the light output from the front surface of the display panel 01 is small. In the case that the display panel 01 further includes the black matrix layer 3 disposed on a side of the plurality of light emitting devices 2 away from the substrate 1, part of the light L emitted by the light emitting devices 2, which is directed to the front surface of the display panel 01, is also blocked by the black matrix layer 3, so that the amount of light emitted from the front surface of the display panel is less, and the display effect of the display panel is poor.

In view of the above problems, as shown in fig. 2A and 2B, some embodiments of the present invention provide a display panel 100 including a substrate 10, a plurality of light emitting devices 20, at least one collimating structure 30, and a filling layer 40. Wherein a plurality of light emitting devices 20 are located on a substrate 10.

The at least one collimating structure 30 is located at a side of the plurality of light emitting devices 20 facing away from the substrate 10. Each collimating structure 30 corresponds to one light emitting device 20. The collimating structure 30 comprises a first columnar body 31 and a plurality of second columnar bodies 32, the plurality of second columnar bodies 32 being arranged around the first columnar body 31, an orthographic projection of the first columnar body 31 on the substrate 10 at least partially overlapping an orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10.

The filling layer 40 is located at a side of the plurality of light emitting devices 20 away from the substrate 10, and the filling layer 40 at least fills a gap between the first columnar body 31 and the second columnar body 32 in the collimating structure 30, and a gap between two adjacent second columnar bodies 32. The refractive index of the filling layer 40 is greater than the refractive indices of the first columnar bodies 31 and the second columnar bodies 32.

Illustratively, the substrate 10 may be a flexible substrate, and in this case, the material of the substrate 10 may include Polyimide (PI), for example.

Illustratively, the substrate 10 may be a rigid substrate. At this time, the material of the substrate 10 may include glass, for example.

Illustratively, the light emitting device 20 may be an organic electroluminescent diode. At this time, the light emitting device 20 may include an anode, a light emitting function layer, and a cathode. The light-emitting functional layer may include, for example, a light-emitting layer. Alternatively, the light emitting function layer may further include one or more layers of an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), and a Hole Injection Layer (HIL), in addition to the light emitting layer.

The number of the light emitting devices 20 is not limited in the present invention. It is understood that fig. 2A is only a partial top view of the display panel 100, and the number of the light emitting devices 20 in fig. 2A does not limit the number of the light emitting devices 20 of the display panel 100 in the present invention.

In the present invention, the light emitting colors of the light emitting devices 20 are not limited, that is, the light emitting devices 20 may emit light of the same color or light of different colors, as long as the display panel 100 can perform a display function.

Illustratively, the plurality of light emitting devices 20 each emit white light. It is understood that the plurality of light emitting devices 20 each emit white light rays is only one example of the present invention, and in other examples, the plurality of light emitting devices 20 may each emit any one of blue light rays, red light rays, green light rays, and the like.

For example, the plurality of light emitting devices 20 may be divided into a plurality of light emitting units, each of which may include three light emitting devices 20, and the three light emitting devices 20 in each of the light emitting units emit light of three primary colors, respectively, e.g., the three light emitting devices 20 may emit light of red, green, and blue colors, respectively.

In some embodiments, as shown in fig. 2B, the display panel 100 further includes a pixel defining layer 50, and the pixel defining layer 50 may include a plurality of first openings 51, one first opening 51 corresponding to one light emitting device 20, i.e., one light emitting device 20 is located in one first opening 51. At this time, an orthogonal projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 overlaps with an orthogonal projection of the first opening 51 on the substrate 10.

The shape of the orthographic projection of the light emitting region 21 of the above-described light emitting device 20 on the substrate 10 is not limited in the present invention. For example, as shown in fig. 2A, an orthogonal projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 is substantially in a diamond shape. Alternatively, as shown in fig. 3, an orthogonal projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 may also be substantially rectangular. Alternatively, the orthographic projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 may also be substantially circular.

Here, "substantially diamond-shaped" means that the shape of the orthographic projection of the light-emitting region 21 of the light-emitting device 20 on the substrate 10 is diamond-shaped as a whole, but is not limited to the standard diamond shape. That is, the "diamond shape" herein includes not only a substantially diamond shape but also a shape similar to a diamond shape in consideration of process conditions.

Similarly, "substantially rectangular" means that the shape of the orthographic projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 is rectangular as a whole, but is not limited to a standard rectangle. "substantially circular" means that the shape of an orthogonal projection of the light emitting region 21 of the light emitting device 20 on the substrate 10 is circular as a whole, but is not limited to a standard circle.

The display panel 100 comprises at least one collimating structure 30, i.e. the display panel 100 may comprise one collimating structure 30 or a plurality of collimating structures 30.

Illustratively, when the display panel 100 includes a plurality of collimating structures 30, one collimating structure 30 may correspond to each light emitting device 20, or one collimating structure 30 may correspond to each of some light emitting devices 20 in the plurality of light emitting devices 20.

In the case where a part of the light emitting devices 20 of the plurality of light emitting devices 20 respectively correspond to one collimating structure 30, for example, a light emitting device 20 for displaying green among the plurality of light emitting devices 20 corresponds to the collimating structure 30, or a light emitting device 20 for displaying red among the plurality of light emitting devices 20 corresponds to the collimating structure 30, or a light emitting device 20 for displaying blue among the plurality of light emitting devices 20 corresponds to the collimating structure 30.

The number of the second cylindrical bodies 32 in the collimating structure 30 of the present invention is not limited as long as the collimating structure 30 can achieve the collimating function.

In some examples, as shown in fig. 2A, the collimating structure 30 may include 6 second cylindrical bodies 32.

In other examples, as shown in fig. 4A, the collimating structure 30 may include 4 second cylindrical bodies 32.

In still other examples, as shown in fig. 4B, the collimating structure 30 may include 8 second cylindrical bodies 32.

"the orthographic projection of the first columnar body 31 on the substrate 10 is at least partially overlapped with the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10" may be that, as shown in fig. 2A, the orthographic projection of the first columnar body 31 on the substrate 10 is partially overlapped with the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10; it is also possible that the orthographic projection of the first columnar body 31 on the substrate 10 completely overlaps the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10.

Wherein the orthographic projection of the first columnar body 31 on the substrate 10 completely overlaps with the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10, for example, as shown in fig. 3, the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10 is located inside the orthographic projection of the first columnar body 31 on the substrate 10, and a distance exists between an edge of the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10 and an edge of the orthographic projection of the first columnar body 31 on the substrate 10. For another example, the edge of the orthographic projection of the first columnar body 31 on the substrate 10 may completely overlap with the edge of the orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10.

Illustratively, the material of the first and second

cylindrical bodies

31 and 32 may include OC glue.

The "filling layer 40 at least fills the gap between the first columnar body 31 and the second columnar body 32 and the gap between two adjacent second columnar bodies 32 in the alignment structure 30", for example, the filling layer 40 may only fill the gap between the first columnar body 31 and the second columnar body 32 and the gap between two adjacent second columnar bodies 32. For another example, the filling layer 40 may fill not only the gaps between the first columnar bodies 31 and the second columnar bodies 32 and between two adjacent second columnar bodies 32 in the alignment structures 30, but also the gaps between two adjacent alignment structures 30.

Illustratively, the material of the fill layer 40 may include OC glue.

In some embodiments of the present invention, a filling layer 40 and at least one collimating structure 30 are disposed on a side of the light emitting device 20 away from the substrate 10, the collimating structure 30 includes a first columnar body 31 and a plurality of second columnar bodies 32, and a refractive index of the filling layer 40 is greater than refractive indices of the first columnar body 31 and the second columnar body 32, so that a light path perpendicular to the substrate 10 can be formed on the side of the light emitting device 20 away from the substrate 10 by using a photonic band gap effect. Thus, when the light emitting device 20 emits light, most of the light emitted by the light emitting device 20 can be confined in the light path and propagate along the light channel in a direction away from the substrate 10, that is, emitted from the front surface of the display panel, so as to increase the light emitting amount of the front surface of the display panel 100, improve the light emitting effect of the front surface of the display panel 100, and further improve the display effect of the display panel 100.

Here, an orthogonal projection of the optical path on the substrate 10 substantially overlaps an orthogonal projection of the first columnar body 31 on the substrate 10.

In some embodiments, as shown in fig. 2B, the orthographic projection of the first cylindrical body 31 on the substrate 10 is circular, and the orthographic projection of the second cylindrical body 32 on the substrate 10 is circular. It is to be understood that the above-mentioned "circular" includes not only a substantially circular shape but also a shape similar to a circle in consideration of process conditions.

Through setting up like this, on the one hand can be so that collimating structure 30's collimation effect is better, and on the other hand can simplify collimating structure 30's design process, reduces the design degree of difficulty.

In some embodiments, as shown in fig. 4C, an orthographic projection of the first cylindrical body 31 on the substrate 10 is a first circle 311, an orthographic projection of the second cylindrical body 32 on the substrate 10 is a second circle 321, and a diameter d1 of the first circle 311 is larger than a diameter d2 of the second circle 321.

It should be noted that the diameter d1 of the first circle 311 and the diameter d2 of the second circle 321 are not limited in the present invention, as long as the diameter d1 of the first circle 311 is larger than the diameter d2 of the second circle 321.

Illustratively, the diameter d1 of the first circle 311 may be 8 microns to 16 microns. For example, the diameter of the first circle 311 may be 8 microns, 10 microns, 12 microns, 16 microns.

Thus, the diameter of the first circle 311 is not too small, so as to avoid the narrow light path formed by the collimating structure 30 from affecting the collimating effect of the light; meanwhile, the diameter of the first circle 311 is not too large, which is beneficial to ensuring that the photonic band gap effect can be applied.

Illustratively, the diameter d2 of the second circle 321 may be 2 microns to 8 microns. For example, the diameter of the second circle 321 may be 2 microns, 4 microns, 6 microns, 8 microns.

In this way, the diameter of the second circle 321 is not too small, so that the problem that the second cylindrical body 32 is difficult to manufacture due to the fact that the diameter of the second circle 321 is too small can be avoided; meanwhile, the diameter of the second circle 321 is not too large, which is beneficial to ensuring the applicability of the photonic band gap effect.

In some embodiments of the present disclosure, the first circle 311 and the second circle 321 have different sizes, so that a defect state is more easily formed at the position of the first circle 311, that is, a light path is more easily formed, and thus more light emitted by the light emitting device 20 is emitted from the front surface of the display panel, which can improve the light emitting rate of the front surface of the display panel 100, improve the display effect of the front surface of the display panel 100, and improve the display effect of the display panel 100.

In some embodiments, as shown in FIG. 4C, the center of the first circle 311 is equidistant from the center of each second circle 321. That is, the distances from the center of the first circle 311 to the center of each second circle 321 may all be d 3.

Through setting up like this, the distance homogeneity between first columnar body 31 to a plurality of second columnar bodies 32, the inside arrangement rule of collimation structure 30, thereby be favorable to forming the light path in one side that the substrate was kept away from at light emitting device 20 more, most light restriction that sends light emitting device 20 is in the light path, carry out collimation to the light that light emitting device 20 sent, and then be favorable to improving display panel 100's positive light-emitting rate, improve display panel 100's positive light-emitting effect, improve display panel 100's display effect.

In other embodiments, as shown in fig. 4C, the distance between the centers of two adjacent second circles 321 is equal. That is, the distances between the centers of two adjacent second circles 321 may be both d 4.

Through setting up like this for arrange more regularly between a plurality of second columns 32, thereby be favorable to forming the light path in one side that the substrate was kept away from at light emitting device 20 more, limit most light that light emitting device 20 sent in the light path, carry out collimation to the light that light emitting device 20 sent, and then be favorable to improving display panel 100's front light-emitting rate, improve display panel 100's front light-emitting effect, improve display panel 100's display effect.

In still other embodiments, as shown in fig. 4C, the distance from the center of the first circle 311 to the center of each second circle 321 is equal, and the distance between the centers of two adjacent second circles 321 is equal.

Through setting up like this, not only can make the distance homogeneity between first columnar body 31 to a plurality of second columnar bodies 32, can also make arranging more regular between a plurality of second columnar bodies 32, thereby can further be favorable to forming the light path in one side that the substrate was kept away from to light emitting device 20, most light restriction that sends light emitting device 20 is in the light path, carry out collimation to the light that light emitting device 20 sent, improve display panel 100's front light-emitting rate, improve display panel 100's front light-emitting effect, improve display panel 100's display effect.

In some embodiments, the difference between the refractive index of the filling layer 40 and the refractive indices of the first columnar bodies 31 and the second columnar bodies 32 is greater than or equal to 0.1.

Here, the refractive index of the filling layer 40, the refractive index of the first columnar bodies 31, and the refractive index of the second columnar bodies 32 are not limited in the present disclosure as long as the difference between the refractive index of the filling layer 40 and the refractive index of the first columnar bodies 31 is greater than or equal to 0.1, and the refractive index of the filling layer 40 and the refractive index of the second columnar bodies 32 are greater than or equal to 0.1.

Through setting up like this for the difference between the refracting index of filling layer 40 and the refracting index of first columnar body 31, the refracting index of second columnar body 32 is great, thereby is favorable to producing the photon band gap effect in collimation structure 30 department more, forms the light channel, realizes carrying out collimation to the light that emitting device 20 sent and handles, improves the positive light-emitting rate of display panel 100, improves the positive light-emitting effect of display panel 100, improves display panel 100's display effect.

Illustratively, the refractive index of the first columnar bodies 31 may be less than 1.57, the refractive index of the second columnar bodies 32 may be less than 1.57, and the refractive index of the filling layer 40 may be 1.67 ± 0.04.

In some embodiments, the refractive indices of the first cylindrical body 31 and the second cylindrical body 32 are equal. That is, the same material may be used for the first columnar body 31 and the second columnar body 32. Through the arrangement, in the process of preparing the collimation structure 30, the first cylindrical body 31 and the second cylindrical body 32 can be prepared simultaneously and share the same mask plate, so that the preparation process of the collimation structure 30 is simplified, the manufacturing efficiency of the display panel 100 is improved, and the cost is reduced.

In some embodiments, as shown in fig. 4C, when the orthographic projection of the first cylindrical body 31 on the substrate 10 is a first circular shape 311, and the orthographic projection of the second cylindrical body 32 on the substrate 10 is a second circular shape 321, a gap exists between the first circular shape 311 and the second circular shape 321, and a gap exists between two adjacent second circular shapes 321. That is, the distance d3 between the center of the first circle 311 and the center of the second circle 321 is larger than the radius of the first circle 311

Radius of the second circle 321

In sum, the distance d4 between the centers of two adjacent second circles 321 is larger than the diameter d2 of the second circle 321.

Through setting up like this, in the in-process of preparing collimation structure 30, be favorable to carrying out patterning, obtain first columnar body 31 and second columnar body 32, avoid in the in-process of preparing collimation structure 30, first columnar body or second columnar body receive the condition appearance of damage.

In some embodiments, as shown in fig. 4C and 5, one or more circles of the second cylindrical body 32 are disposed around the first cylindrical body 31.

For example, as shown in fig. 5, the first cylindrical body 31 may be provided with two circles of the second cylindrical body 32 around the circumference. At this time, when the orthographic projection of the first cylindrical body 31 on the substrate 10 is the first circle 311 and the orthographic projection of the second cylindrical body 32 on the substrate 10 is the second circle 321, the midpoints of the plurality of second circles 321 may be located on the dashed frame W1 and the dashed frame W2, respectively, so as to surround two circles around the first circle 311.

By arranging one or more circles of second cylindrical bodies 32 around the first cylindrical bodies 31, the light emitted by the light emitting device 20 corresponding to the collimating structure 30 is better limited in the light path, the front light-emitting rate of the display panel 100 is improved, the front light-emitting effect of the display panel 100 is improved, and the display effect of the display panel 100 is improved.

In some implementations, the single turn second columns 32 may be arranged in a quadrilateral, hexagonal, octagonal, or circular shape, among others. For example, referring to fig. 4A, a circle of the second cylindrical bodies 32 is disposed around the first cylindrical bodies 31, and at this time, a pattern formed by sequentially connecting centers of orthographic projections of the second cylindrical bodies 32 on the substrate 10 is a quadrangle. For another example, referring to fig. 4B, a circle of the second cylindrical bodies 32 is disposed around the first cylindrical bodies 31, and at this time, a pattern formed by sequentially connecting centers of orthographic projections of the second cylindrical bodies 32 on the substrate 10 is an octagon. For another example, referring to fig. 4C, the second columnar bodies 32 are arranged in a circle around the first columnar bodies 31, and at this time, a pattern formed by sequentially connecting centers of orthographic projections of the second columnar bodies 32 on the substrate 10 is a hexagon.

In some embodiments, when the first cylindrical body 31 is surrounded by a plurality of circles of second cylindrical bodies 32, the plurality of circles of second cylindrical bodies 32 may be arranged in the same pattern and have different sizes. For example, referring to fig. 5, the pattern formed by connecting the centers of the orthographic projections of the two circles of second pillars 32 on the substrate 10 is a hexagon, but the two hexagons are different in size.

In some embodiments, as shown in fig. 2B, along a direction perpendicular to the substrate 10, the height of the first pillars 31 is the same as the height of the filling layer 40, and the height of the second pillars 32 is the same as the height of the filling layer 40.

Illustratively, the height ranges of the first columnar bodies 31, the second columnar bodies 32 and the filling layer 40 may each be 0.3mm to 1 mm.

Through setting up like this, can make the thickness of filling layer 40 less to be favorable to reducing display panel 100's thickness, the rete thickness that the light that can also reduce light-emitting device 20 simultaneously sent passed reduces light loss, improves display panel 100's display effect.

In some embodiments, as shown in fig. 6, the display panel 100 further includes an encapsulation layer 60. The encapsulation layer 60 is located on a side of the plurality of light emitting devices 20 away from the substrate 10. The at least one collimating structure 30 is located at a side of the encapsulation layer 60 facing away from the substrate 10.

The encapsulating layer 60 is used to encapsulate the plurality of light emitting devices 20 on the substrate 10, block moisture and/or oxygen, and prevent moisture and/or oxygen from entering the light emitting devices 20 to affect the normal light emission of the light emitting devices.

In some examples, as shown in fig. 6, the encapsulation layer 60 may be a single layer structure. At this time, the material of the encapsulation layer 60 may include silicon oxide or silicon nitride, for example.

In other examples, as shown in fig. 7, the encapsulation layer 60 may be a multi-layer structure. When the encapsulation layer 60 is a multilayer structure, the encapsulation layer 60 may include, for example, a first inorganic insulating layer 61, an organic insulating layer 62, and a second inorganic insulating layer 63, which are sequentially distant from the substrate 10.

The material of the first inorganic insulating layer 61 and the second inorganic insulating layer 63 may be the same, for example, the material of the first inorganic insulating layer 61 and the second inorganic insulating layer 63 both include silicon oxide or silicon nitride.

In some embodiments of the present invention, the at least one collimating structure 30 is located on a side of the encapsulation layer 60 away from the substrate 10, so that after a part of light emitted by the light emitting device 20 passes through the encapsulation layer 60, the collimating structure 30 can perform collimation processing, thereby increasing the front light emitting amount of the display panel, improving the front light emitting effect of the display panel, and improving the display effect of the display panel.

In other embodiments, as shown in fig. 8, the at least one collimating structure 30 may also be located on a side of the encapsulation layer 60 close to the substrate 10.

In this way, the distance between the collimating structure 30 and the light emitting device 20 in the direction perpendicular to the substrate 10 is smaller, so that more light rays emitted by the light emitting device 20 can enter the light channel, propagate in the light channel perpendicular to the substrate 10, and exit from the front surface of the display panel 100, thereby increasing the light emitting amount of the front surface of the display panel 100 and improving the display effect of the display panel.

Illustratively, when the at least one collimating structure 30 may also be located at a side of the encapsulation layer 60 close to the substrate 10, the filling layer 40 may also serve as a support layer for supporting a mask plate required in the process of forming the light emitting device.

In some embodiments, as shown in fig. 9, the display panel 100 further includes a black matrix layer 70 and a plurality of color block blocks 80. Wherein the black matrix layer 70 is located at a side of the at least one collimating structure 30 facing away from the substrate 10. The black matrix layer 70 includes a plurality of second openings 71, and a color block 80 is disposed in one of the second openings 71. And the orthographic projection of the color resist block 80 on the substrate 10 is located inside the orthographic projection of the light emitting device 20 on the substrate 10.

Illustratively, the plurality of color blocks 80 may include a red color block, a green color block, and a blue color block.

Some embodiments of the present invention can also reduce power consumption of the display panel 100 by using the black matrix layer 70 and the plurality of color blocks 80 instead of the circular polarizer.

In some embodiments, as shown in fig. 10, the display panel 100 further includes a circuit structure layer 90 positioned at a side of the plurality of light emitting devices 20 close to the substrate 10.

For example, the circuit structure layer 90 may include a plurality of pixel driving circuits, and one pixel driving circuit is electrically connected to one light emitting device 20 for driving the light emitting device 20 to emit light.

Each of the pixel driving circuits may include a plurality of thin film transistors, each of which may further include an active layer, a source electrode, a drain electrode, a gate electrode, and a gate insulating layer, the source electrode and the drain electrode being in contact with the active layer, respectively.

In some embodiments, as shown in fig. 10, the display panel 100 further includes a planarization layer 91 on a side of the black matrix layer 70 away from the substrate 10. The plurality of color resist blocks 80 can be protected on the one hand and other film layers can be conveniently attached on the other hand by arranging the planarization layer 91.

Some embodiments of the present invention further provide a method for manufacturing the display panel 100. As shown in fig. 11, the manufacturing method includes:

s1, a plurality of light emitting devices 20 are formed on the substrate 10.

S2, forming at least one collimating structure 30 on a side of the plurality of light emitting devices 20 remote from the substrate 10. Each collimating structure 30 corresponds to one light emitting device 20. The collimating structure 30 comprises a first columnar body 31 and a plurality of second columnar bodies 32, the plurality of second columnar bodies 32 being arranged around the first columnar body 31, an orthographic projection of the first columnar body 31 on the substrate 10 at least partially overlapping an orthographic projection of the light emitting region 21 of the corresponding light emitting device 20 on the substrate 10.

Illustratively, the alignment structure 30 may be patterned by an OC glue layer. Before the OC glue layer is patterned, the positions of the plurality of light emitting devices 20 on the substrate 10 may be detected, the arrangement of the collimating structures 30 is determined according to the positions of the plurality of light emitting devices 20, and then the required mask plate is prepared according to the arrangement of the collimating structures 30.

S3, forming a filling layer 40 on a side of the plurality of light emitting devices 20 away from the substrate 10. The filling layer 40 fills at least the gap between the first columnar body 31 and the second columnar body 32 in the collimating structure 30, and the gap between two adjacent second columnar bodies 32. The refractive index of the filling layer 40 is greater than the refractive indices of the first columnar bodies 31 and the second columnar bodies 32.

The beneficial effects that can be achieved by the manufacturing method of the display panel 100 according to some embodiments of the present invention are the same as those achieved by the display panel according to any of the above embodiments, and are not described herein again.

As shown in fig. 12, some embodiments of the present disclosure provide a display device 200, and the display device 200 includes the display panel 100 provided in any of the above embodiments.

The display device 200 may be any component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.

The beneficial effects that can be achieved by the display device 200 according to some embodiments of the present invention are the same as those that can be achieved by the display panel 100 according to any of the above embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the present invention shall be covered thereby. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A display panel, comprising:

a substrate;

a plurality of light emitting devices on the substrate;

at least one collimating structure located on a side of the plurality of light emitting devices remote from the substrate; each collimating structure corresponds to one light emitting device; the collimating structure comprises a first columnar body and a plurality of second columnar bodies, the second columnar bodies are arranged around the first columnar body, and the orthographic projection of the first columnar body on the substrate at least partially overlaps with the orthographic projection of the light emitting area of the corresponding light emitting device on the substrate;

the filling layer is positioned on one side, away from the substrate, of the plurality of light-emitting devices, and at least fills gaps between the first columnar bodies and the second columnar bodies in the collimation structure and gaps between two adjacent second columnar bodies; the refractive index of the filling layer is greater than the refractive indices of the first columnar body and the second columnar body.

2. The display panel according to claim 1, wherein an orthographic projection of the first columnar body on the substrate is circular, and an orthographic projection of the second columnar body on the substrate is circular.

3. The display panel according to claim 2, wherein an orthographic projection of the first columnar body on the substrate is a first circle, and an orthographic projection of the second columnar body on the substrate is a second circle, and wherein a diameter of the first circle is larger than a diameter of the second circle.

4. The display panel according to claim 2, wherein the distance from the center of the first circle to the center of each of the second circles is equal; and/or the presence of a gas in the gas,

the distance between the centers of two adjacent second circles is equal.

5. The display panel according to any one of claims 1 to 4, wherein a difference between a refractive index of the filling layer and a refractive index of each of the first columnar bodies and the second columnar bodies is greater than or equal to 0.1.

6. The display panel according to any one of claims 1 to 4, wherein the first columnar body and the second columnar body have the same refractive index.

7. The display panel according to any one of claims 1 to 4, wherein one or more circles of the second columnar body are arranged around the first columnar body.

8. The display panel according to any one of claims 1 to 4, wherein the height of the first columnar body is the same as the height of the filling layer, and the height of the second columnar body is the same as the height of the filling layer in a direction perpendicular to the substrate.

9. The display panel according to any one of claims 1 to 4, further comprising:

the packaging layer is positioned on one side of the plurality of light-emitting devices far away from the substrate; the at least one alignment structure is located on a side of the encapsulation layer away from the substrate.

10. A display device, comprising:

the display panel according to any one of claims 1 to 9.