CN111725418B - Display panel - Google Patents
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- CN111725418B CN111725418B CN202010436521.7A CN202010436521A CN111725418B CN 111725418 B CN111725418 B CN 111725418B CN 202010436521 A CN202010436521 A CN 202010436521A CN 111725418 B CN111725418 B CN 111725418B
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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
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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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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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
Abstract
The application provides a display panel, including: the light-emitting layer comprises a plurality of light-emitting units arranged in an array; the light converging layer is arranged on one side of the light emitting surface of the light emitting layer, comprises at least one light converging unit which is arranged corresponding to the light emitting unit and is used for converging the light emitted by the light emitting unit at the corresponding position; the black matrix layer is arranged on one side of the light emitting surface of the light emitting layer and comprises a plurality of light outlets which are arranged in an array mode, and one light outlet corresponds to one light emitting unit; the size of the light outlet at the position of the light-emitting unit correspondingly provided with the light converging unit is smaller than that of the light-emitting unit, and the light converged by the light converging unit is emitted to the outer side of the display panel through the light outlet at the corresponding position. In this way, this application can make on the basis that does not reduce luminous efficiency through the design of light convergence layer, increase black matrix layer's area to improve the effect that black matrix layer absorbed external environment light.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display panel.
Background
At present, in order to reduce the reflection of the metal layer in the display panel to the external ambient light, a polarizer is generally required to be disposed on one side of the light emitting surface of the display panel to reduce the reflection of the metal layer to the external ambient light, and to improve the contrast of the display panel under strong light. But the polarization principle of the polarizer causes the light extraction efficiency of the display panel to be at least 50% lost.
Disclosure of Invention
The application provides a display panel can make on the basis that does not reduce luminous efficiency through the design on light convergence layer, the area on increase black matrix layer to improve the effect that black matrix layer absorbed external environment light.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a display panel including: the light emitting layer comprises a plurality of light emitting units arranged in an array; the light converging layer is arranged on one side of the light emitting surface of the light emitting layer, comprises at least one light converging unit which is arranged corresponding to the light emitting unit and is used for converging the light emitted by the light emitting unit at the corresponding position; the black matrix layer is arranged on one side of the light emitting surface of the light emitting layer and comprises a plurality of light outlets which are arranged in an array mode, and one light outlet corresponds to one light emitting unit; the size of the light outlet at the position of the light emitting unit, where the light converging unit is correspondingly arranged, is smaller than that of the light emitting unit, and the light converged by the light converging unit is emitted to the outer side of the display panel through the light outlet at the corresponding position.
Wherein, the light convergence unit includes: and the convex lens is used for converging the light rays emitted by the light-emitting unit at the corresponding position.
Wherein, the light converging unit further comprises: the concave lens is arranged on one side, away from the light emitting layer, of the convex lens and used for diverging the light rays converged by the convex lens, the black matrix layer comprises a first surface away from the light emitting layer, and the light rays diverged by the concave lens are smaller than the light emitting units at the corresponding positions in the size of the light spots formed on the first surface.
The size of the light spot formed on the first surface by the light rays diverged by the concave lens is smaller than or equal to the size of the light outlet at the corresponding position on the first plane.
The convex lens comprises a second surface and a third surface which are oppositely arranged, the second surface is opposite to the third surface and close to the light-emitting unit, the second surface is a plane, and the third surface is a convex surface.
The concave lens comprises a fourth surface and a fifth surface which are oppositely arranged, the fourth surface is close to the light emitting unit relative to the fifth surface, the fourth surface is a plane, and the fifth surface is a concave surface.
Wherein the image distance of the convex lens is the same as the object distance of the concave lens at the corresponding position; and/or the object distance of the convex lens is equal to the distance between the light-emitting unit at the corresponding position and the optical center of the convex lens.
Wherein the light convergence layer is located between the black matrix layer and the light emitting layer, and the display panel further includes: and the filter layer is arranged on the same layer as the black matrix layer and comprises a plurality of filter units, and one filter unit is arranged at one light outlet.
The concave lens and the black matrix layer are arranged on the same layer and are arranged in the light outlet of the black matrix layer, and the concave lens is made of a light filtering material.
And the position of each light-emitting unit is provided with one light converging unit.
Different from the prior art situation, the beneficial effects of this application are: the application provides a light of luminescent layer one side of going out of display panel's light-emitting face is provided with light and assembles layer and black matrix layer, wherein, is provided with the light-emitting window that a plurality of arrays were arranged on the black matrix layer, and light that light assembled layer can send the luminescent layer is jetted out to the display panel outside through the light-emitting window that corresponds position department after assembling. Due to the effect of the light convergence layer, the size of the outlet light can be smaller than that of the light emitting unit at the corresponding position, so that the area of the black matrix layer can be increased on the premise of not reducing the light emitting efficiency, the effect of absorbing the external environment light by the black matrix layer is improved, the reflectivity of the display panel is lower, and the blackness is better.
In addition, the thickness of the black matrix layer is generally smaller than that of the polarizer, so that the purpose of reducing the thickness of the display panel can be achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of another embodiment of the convex lens of FIG. 1;
FIG. 3 is a schematic structural diagram of an embodiment of a light spot and a light outlet at a first plane position in FIG. 1;
FIG. 4 is a schematic structural diagram of another embodiment of the concave lens of FIG. 1;
fig. 5 is a schematic structural diagram of another embodiment of a display panel according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, where the display panel includes a light emitting layer 10, a light converging layer 12, and a black matrix layer 14.
The light-emitting layer 10 includes a plurality of light-emitting units 100 arranged in an array, where the light-emitting units 100 may be any one of red R light-emitting units, green G light-emitting units, and blue B light-emitting units; in addition, a spacing unit 102 may be further disposed between adjacent light emitting units 100 in the light emitting layer 10, and the spacing unit 102 may be formed by stacking a pixel defining layer and a spacer to define the positions of the light emitting units 100. The two opposite sides of the light-emitting layer 10 may further be respectively provided with a cathode electrode layer 16 and an anode electrode layer 18, and under the action of a driving current, the cathode electrode layer 16 and the anode electrode layer 18 may enable the light-emitting layer 10 to emit light.
The light converging layer 12 is disposed on a light emitting surface (not labeled) side of the light emitting layer 10, and includes at least one light converging unit 120 corresponding to the light emitting unit 100 for converging light emitted from the light emitting unit 100 at a corresponding position. For example, in the present embodiment, one light converging unit 120 may be correspondingly disposed at each position of the light emitting unit 100, so that the actual area of the subsequent black matrix layer 14 may be increased as much as possible, so as to improve the effect of the black matrix layer 14 absorbing the external ambient light.
The black matrix layer 14 is disposed on one side of the light emitting surface of the light emitting layer 10, and includes a plurality of light outlets (not labeled) arranged in an array, and one light outlet corresponds to one light emitting unit 100; the light outlet may be circular, oval, or the like, and the size of the light outlet at the position of the light emitting unit 100 corresponding to the light converging unit 120 is smaller than that of the light emitting unit 100, and the light converged by the light converging unit 120 is emitted to the outside of the display panel through the light outlet at the corresponding position. For example, in the present embodiment, a light converging unit 120 is correspondingly disposed at each position of the light emitting unit 100, and the size of all light outlets on the black matrix layer 14 is smaller than the size of the light emitting unit 100 at the corresponding position, so that the actual area of the black matrix layer 14 after the light outlets are removed can be increased as much as possible, so as to improve the effect of the black matrix layer 14 absorbing the external ambient light. In this embodiment, the material of the black matrix layer 14 may be a negative photoresist, and the thickness thereof may be 0.1 to 10 micrometers (e.g., 2.5 micrometers, 5 micrometers, 7 micrometers, and the like), which may be selected and set according to actual situations. The thickness of the polarizer used in the prior art is generally thicker, and is between 60 micrometers and 150 micrometers, compared with the way of the black matrix layer 14 used in the present application, the thickness of the display panel can be significantly reduced.
In the above embodiment, due to the light converging layer 12, the size of the exit light in the black matrix layer 14 may be smaller than the size of the light emitting unit 100 at the corresponding position, so that the area of the black matrix layer 14 may be increased on the premise of not reducing the light emitting efficiency, so as to improve the effect of the black matrix layer 14 on absorbing the external environment light, so that the reflectivity of the display panel is lower, and the "blackness" is better; moreover, since the thickness of the black matrix layer 14 is generally smaller than that of the polarizer, the thickness of the display panel can be reduced.
In an embodiment, with continued reference to fig. 1, the light converging unit 120 includes a convex lens 1200, as shown by a dotted arrow in fig. 1, where the dotted arrow in fig. 1 can be regarded as light, and the convex lens 1200 can converge the light emitted by the light emitting unit 100 at the corresponding position. In general, the smaller the focal length of the convex lens 1200, the stronger the ability to converge light. The design of the convex lens 1200 is simple, and the purpose of converging light can be conveniently realized. In addition, in the present embodiment, the convex lens 1200 includes a second surface a1 and a third surface a2 which are oppositely disposed, the second surface a1 is close to the light emitting unit 100 relative to the third surface a2, the second surface a1 is a plane, and the third surface a2 is a convex surface. The way that the second surface a1 of the convex lens 1200 is a plane is advantageous for the process preparation, and the convex lens 1200 can well converge the parallel light emitted by the light emitting unit 100.
In an application scenario, as shown in fig. 1, the third surface a2 of the convex lens 1200 is an arc-shaped convex surface, and the material of the convex lens 1200 may be organic, which may be formed by a ball-planting manner similar to a ball-planting machine. When the material used to form the convex lens 1200 is spread in the form of a droplet on a plane (e.g., the package layer 11 in fig. 1), the material can have different contact angles on the plane by adjusting the hydrophilic relationship between the material and the plane below the material, and the different contact angles correspond to the curvature of the third surface a 2. The specific forming process can be as follows: firstly, forming a patterned limiting layer on the encapsulation layer 11 in fig. 1, where the limiting layer includes a plurality of openings, and the position of each opening corresponds to the position of the light emitting unit 100; then, a convex lens 1200 is formed in each opening by ball mounting with a ball mounting machine. Of course, in other embodiments, the convex lens 1200 may be formed externally in advance and then disposed on the encapsulation layer 11 by means of attaching.
In another application scenario, as shown in fig. 2, fig. 2 is a schematic structural diagram of another embodiment of the convex lens in fig. 1. The third surface A2a of the convex lens 1200a is a convex surface formed by joining a plurality of facets. The convex lens 1200a may include a plurality of first film layers 12000 stacked in layers, and in a direction away from the light emitting layer 10, at least a portion of the first film layers 12000 may be sequentially reduced in size to form a protruding structure, so as to form the convex lens 1200 a. For example, the convex lens 1200a in fig. 2 is formed by sequentially stacking at least three first film layers 12000a, 12000b, and 12000c, and the average size of the middle first film layer 12000b is smaller than that of the first film layer 12000a therebelow and larger than that of the first film layer 12000c thereabove. In addition, for the same first film layer 12000, the cross-sectional dimension may be the same in the direction away from the light-emitting layer 10, such as the first film layer 12000 a; alternatively, the cross-sectional dimension may gradually decrease in a direction away from the light-emitting layer 10, for example, the first film layers 12000b and 12000c, which is not limited in this application.
Further, referring to fig. 1 again, the light converging unit 120 provided by the present application may further include a concave lens 1202 disposed on a side of the convex lens 1200 away from the light emitting layer 10, in addition to the convex lens 1200, for diverging the light converged by the convex lens 1200; and the black matrix layer 14 includes a first surface B1 far from the light-emitting layer 10, the light spot formed on the first surface B1 by the light rays diverged by the concave lens 1202 is smaller in size than the light-emitting unit 100 at the corresponding position. The concave lens 1202 can adjust the angle of the light rays converged by the convex lens 1200 and then emit the light rays, and the purpose of adjusting the emitting angle of the light rays can be specifically achieved according to the mode of adjusting the focal length of the concave lens 1202; generally speaking, the smaller the focal length of the concave lens 1202, the larger the exit angle of the light, so as to improve the problems of color shift and brightness attenuation of the display panel under a large angle; in addition, the light spot formed on the first surface B1 by the light rays diffused by the convex lens 1202 is smaller than the size of the light-emitting unit 100 at the corresponding position, so that the size of the light outlet of the black matrix layer 14 can be reduced, that is, the effective area of the black matrix layer 14 can be increased, and the effect of the black matrix layer in absorbing the external environment light can be improved.
In this embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of an embodiment of the light spot and the light outlet at the first plane position in fig. 1. The size d1 of a light spot formed by the light rays diverged by the concave lens 1202 on the first surface B1 is less than or equal to the size d2 of the light outlet at the corresponding position on the first plane B1. The design mode can ensure that the light rays diffused by the concave lens 1202 can be emitted out completely as much as possible so as to ensure the light emitting efficiency.
Further, in the present embodiment, as shown in fig. 1, the concave lens 1202 includes a fourth surface C1 and a fifth surface C2 which are oppositely disposed, the fourth surface C1 is close to the light emitting unit 100 relative to the fifth surface C2, the fourth surface C1 is a flat surface, and the fifth surface C2 is a concave surface. The concave lens 1202 of this structure facilitates process fabrication.
In one application scenario, as shown in fig. 1, the fifth surface C2 of the concave lens 1202 is an arc-shaped concave surface, the concave lens 1202 may be made of organic material, etc., a plurality of concave lenses 1202 may be formed on the outside first, and then mounted on the package layer 11 in fig. 1 by means of mounting or the like.
In yet another application scenario, as shown in fig. 4, fig. 4 is a schematic structural diagram of another embodiment of the concave lens in fig. 1. The fifth surface C2a of the concave lens 1202a is a concave surface formed by joining a plurality of facets. The concave lens 1202a may include a plurality of second film layers 12020 stacked, and at least a portion of the second film layers 12020 is disposed with through holes; preferably, all the through holes may have a symmetrical structure, and the central axes of all the through holes coincide with each other. In the direction away from the light emitting layer 10, the sizes of the through holes of at least a portion of the second film layer 12020 are sequentially increased to form a concave structure, so as to form the concave lens 1202 a. For example, the concave lens 1202a in fig. 4 is formed by stacking at least three layers of the second film layers 12020a, 12020b, 12020c in sequence, and the average size of the through holes on the middle second film layer 12020b is larger than the average size of the through holes on the lower second film layer 12020a, and smaller than the average size of the through holes on the upper second film layer 12020 c. In addition, for the same second film layer 12020, the size of the through hole may be the same in the direction away from the light-emitting layer 10, for example, the size of the through hole of the lowermost second film layer 12020a is 0; alternatively, the size of the through holes may gradually increase in the direction away from the light emitting layer 10, for example, the second film layers 12020b and 12020c, which is not limited in this application.
In addition, referring to fig. 1 again, the image distance L1 of the convex lens 1200 is the same as the object distance L2 of the concave lens 1202 at the corresponding position, and the design method can make the light emitted from the convex lens 1200 reach the concave lens 1202 as much as possible to ensure the light-emitting efficiency; and/or the object distance L3 of the convex lens 1200 is equal to the distance between the optical centers P1 of the light-emitting unit 100 and the convex lens 1200 at the corresponding position, and the design mode can enable the light emitted by the light-emitting unit 100 to reach the convex lens 1200 as far as possible, so as to ensure the light extraction efficiency.
In another embodiment, referring to fig. 1, in order to improve the display effect, the light converging layer 120 of the display panel provided in fig. 1 is located between the black matrix layer 14 and the light emitting layer 10, the display panel may further include a filter layer 13 disposed on the same layer as the black matrix layer 14, and including a plurality of filter units 130, and one filter unit 130 is disposed at a light outlet. The filter layer 13 is arranged to filter out unwanted light of a certain color, so that the human eye can receive light of a certain color that is relatively saturated. For example, in the present embodiment, the filter unit 130 disposed at the position of the red R light emitting unit is a red R filter unit, which can filter out blue light and green light; the filter unit 130 disposed at the position of the green G light emitting unit is a green G filter unit, which can filter out red light and blue light; the filter unit 130 disposed at the position of the blue B light emitting unit is a blue B filter unit that can filter out red and green light.
Of course, in other embodiments, the filter layer and the concave lens may be unified, that is, the filter layer itself is designed to be a film layer having a function of the concave lens, so that the thickness of the display panel is further reduced. As shown in fig. 5, fig. 5 is a schematic structural diagram of another embodiment of a display panel according to the present application. In this embodiment, the convex lens 1200b is located between the black matrix layer 14b and the light emitting layer 10b, the concave lens 1202b is disposed in the same layer as the black matrix layer 14b and disposed in the light outlet of the black matrix layer 14b, and the concave lens 1202b is made of a light filtering material. For example, the concave lens 1202b provided at the position of the red R light emitting unit is formed of a red filter material that filters out blue light and green light; the concave lens 1202b provided at the position of the green G light emitting unit is formed of a green filter material that can filter out blue light and red light; the concave lens 1202B provided at the position of the blue B light emitting unit is formed of a blue filter material that filters out green light and red light.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (8)
1. A display panel, comprising:
the light emitting layer comprises a plurality of light emitting units arranged in an array;
the light converging layer is arranged on one side of the light emitting surface of the light emitting layer, comprises at least one light converging unit arranged corresponding to the light emitting unit and is used for converging the light emitted by the light emitting unit at the corresponding position;
the black matrix layer is arranged on one side of the light emitting surface of the light emitting layer and comprises a plurality of light outlets which are arranged in an array mode, and one light outlet corresponds to one light emitting unit; the size of the light outlet at the position of the light-emitting unit correspondingly provided with the light converging unit is smaller than that of the light-emitting unit, and the light converged by the light converging unit is emitted to the outer side of the display panel after passing through the light outlet at the corresponding position;
wherein, the light converging unit includes: the convex lens is used for converging the light rays emitted by the light emitting units at the corresponding positions; the concave lens is arranged on one side, away from the light emitting layer, of the convex lens and used for diverging the light rays converged by the convex lens, the black matrix layer comprises a first surface away from the light emitting layer, and the light rays diverged by the concave lens are smaller than the light emitting units at the corresponding positions in the size of the light spots formed on the first surface.
2. The display panel according to claim 1,
the size of the light spot formed by the light rays diverged by the concave lens on the first surface is smaller than or equal to the size of the light outlet at the corresponding position on the first surface.
3. The display panel according to claim 1,
the convex lens comprises a second surface and a third surface which are oppositely arranged, the second surface is opposite to the third surface and close to the light-emitting unit, the second surface is a plane, and the third surface is a convex surface.
4. The display panel according to claim 1,
the concave lens comprises a fourth surface and a fifth surface which are oppositely arranged, the fourth surface is close to the light emitting unit relative to the fifth surface, the fourth surface is a plane, and the fifth surface is a concave surface.
5. The display panel according to claim 1,
the image distance of the convex lens is the same as the object distance of the concave lens at the corresponding position; and/or the object distance of the convex lens is equal to the distance between the light-emitting unit at the corresponding position and the optical center of the convex lens.
6. The display panel according to any one of claims 1 to 5,
the light convergence layer is located between the black matrix layer and the light emitting layer, and the display panel further includes:
and the filter layer is arranged on the same layer as the black matrix layer and comprises a plurality of filter units, and one filter unit is arranged at one light outlet.
7. The display panel according to claim 1,
the concave lens and the black matrix layer are arranged on the same layer and are arranged in the light outlet of the black matrix layer, and the concave lens is made of a light filtering material.
8. The display panel according to claim 1,
and the light converging unit is arranged at the position of each light emitting unit.
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| CN202010436521.7A CN111725418B (en) | 2020-05-21 | 2020-05-21 | Display panel |
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| CN202010436521.7A CN111725418B (en) | 2020-05-21 | 2020-05-21 | Display panel |
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| WO2022226725A1 (en) * | 2021-04-26 | 2022-11-03 | 京东方科技集团股份有限公司 | Optical module and manufacturing method therefor, and display apparatus |
| CN113690390A (en) * | 2021-08-23 | 2021-11-23 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| WO2024060008A1 (en) * | 2022-09-20 | 2024-03-28 | 京东方科技集团股份有限公司 | Display panel, display apparatus, and method for preparing display panel |
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| CN111162110A (en) * | 2020-02-10 | 2020-05-15 | 重庆京东方显示技术有限公司 | Organic light-emitting display panel, manufacturing method thereof and display device |
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