CN115988909A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN115988909A CN115988909A CN202211456640.4A CN202211456640A CN115988909A CN 115988909 A CN115988909 A CN 115988909A CN 202211456640 A CN202211456640 A CN 202211456640A CN 115988909 A CN115988909 A CN 115988909A
- Authority
- CN
- China
- Prior art keywords
- light extraction
- light
- pixel
- layer
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention provides a display panel and a display device. The display panel comprises a plurality of pixel areas and non-pixel areas outside the pixel areas; the display panel comprises a substrate, a pixel light-emitting layer, a light extraction layer and a filling layer; the pixel light-emitting layer is arranged on one side of the substrate and comprises a plurality of pixel light-emitting units arranged at intervals; each pixel light-emitting unit corresponds to one pixel area, and the interval area between the pixel light-emitting units corresponds to the non-pixel area; the light extraction layer is arranged on one side of the pixel light-emitting layer far away from the substrate and comprises a plurality of light extraction structures; a plurality of light extraction structures disposed in the non-pixel region, the plurality of light extraction structures being located on at least one side of a single pixel region; the filling layer is arranged on one side of the light extraction layer far away from the substrate; a filling layer covering each light extraction structure in the light extraction layer; the refractive index of the material of the filling layer is larger than the refractive index of the material of the light extraction structure. The light extraction efficiency of the display panel is 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
Self-luminous display panels, such as Organic Light-Emitting Diodes (OLEDs) and Quantum Dot Light-Emitting Diodes (QLEDs), are widely used in various display devices, such as mobile phones, flat panels, and personal computers and televisions, due to their self-luminous characteristics.
The high efficiency is the direction of the OLED, and the light extraction efficiency is generally improved by optimizing an EL (electroluminescence) material and a structure, but along with the improvement of the light extraction efficiency, the optimization space of the EL material and the structure becomes smaller and smaller, so how to further improve the light extraction efficiency on the premise of not changing the EL structure becomes a problem which needs to be solved urgently.
Disclosure of Invention
Embodiments of the invention provide a display panel and a display device to improve light extraction efficiency. The specific technical scheme is as follows:
an embodiment of a first aspect of the present application provides a display panel, which includes a plurality of pixel regions and a non-pixel region outside the pixel regions; the display panel includes: a substrate, a pixel light emitting layer, a light extraction layer and a filling layer; the pixel light-emitting layer is arranged on one side of the substrate and comprises a plurality of pixel light-emitting units arranged at intervals; each pixel light-emitting unit corresponds to one pixel area, and a spacing area between the pixel light-emitting units corresponds to the non-pixel area; the light extraction layer is arranged on one side of the pixel light-emitting layer far away from the substrate and comprises a plurality of light extraction structures; the plurality of light extraction structures are disposed in the non-pixel region and the plurality of light extraction structures are located on at least one side of a single pixel region; the filling layer is arranged on one side of the light extraction layer, which is far away from the substrate; the filling layer covers each of the light extraction structures in the light extraction layer; the refractive index of the material of the filling layer is greater than the refractive index of the material of the light extraction structure.
In some embodiments of the present application, an orthographic projection of a plurality of the light extraction structures on the substrate surrounds an orthographic projection of a single pixel light emitting unit on the substrate, and the light extraction structures are disposed in contact with or spaced apart from each other adjacent to the light extraction structures.
In some embodiments of the present application, the plurality of light extraction structures form a single-turn or a multi-turn-around arrangement for a single pixel region.
In some embodiments of the present application, in a case where the plurality of light extraction structures form a plurality of circles around a single pixel region, the light extraction structures of different circles are staggered.
In some embodiments of the present application, the light extraction structures are in the shape of one or more of a hemisphere, a cylinder, a trapezoid, or a cylinder with a hemispherical top end.
In some embodiments of the present application, the height of the light extraction structures is greater than the separation distance between adjacent light extraction structures.
In some embodiments of the present application, the light extraction structure has a first reflective surface for receiving incident light from the filling layer, and an included angle θ between the first reflective surface and the substrate satisfies the following range: theta is more than or equal to 90 degrees and less than 180 degrees.
In some embodiments of the present application, the display panel further comprises: an encapsulation layer disposed between the light extraction layer and the pixel light emitting layers, covering each of the pixel light emitting cells in the pixel light emitting layers; a refractive index of a material of the encapsulation layer is less than a refractive index of a material of the light extraction structure;
the bottom end of each light extraction structure in the light extraction layer is in contact with the encapsulation layer.
In some embodiments of the present application, the display panel further comprises: the cover plate is arranged on one side, far away from the substrate, of the light extraction layer; the rubber frame is provided with a surrounding side wall, and the top end and the bottom end of the side wall are respectively abutted against the cover plate and the base plate, so that the cover plate, the rubber frame and the base plate form an accommodating cavity; the pixel light emitting layer, the light extraction layer and the filling layer are arranged in the accommodating cavity.
Embodiments of the second aspect of the present application propose a display device, which includes the display panel in any embodiment of the first aspect.
The display panel of this application embodiment has pixel district and non-pixel district, display panel includes the base plate, the pixel luminescent layer, light extraction layer and filling layer, the pixel luminescent layer includes the pixel luminescence unit of a plurality of interval settings, light extraction layer includes a plurality of light extraction structures, pixel luminescence unit sets up in the pixel district, a plurality of light extraction structures set up in non-pixel district, a plurality of light extraction structures are located one side at least in single pixel district, each light extraction structure in the filling layer covers light extraction layer, the refracting index of the material of filling layer is greater than the refracting index of the material of light extraction structure. In general, a part of light emitted from the pixel light emitting unit is emitted from the light emitting side of the display panel, and the rest of the light is lost in the display panel. The display panel is internally provided with a light extraction structure, the pixel light-emitting unit is arranged in the pixel area, and the plurality of light extraction structures are arranged in the non-pixel area, so that the normal light emission in the pixel light-emitting unit area is not influenced; the filling layer covers all the light extraction structures in the light extraction layer, the refractive index of the material of the filling layer is larger than that of the material of the light extraction structures, the light extraction structures can change the paths of light rays which are emitted to the light extraction structures and are subjected to total reflection, so that some light rays which are originally lost in the display panel are emitted from the display panel, the light emission loss is reduced, and the light extraction efficiency of the display panel is improved; and the plurality of light extraction structures are positioned on at least one side of the single pixel region, so that more loss light rays are totally reflected on the light extraction structures, and the light extraction efficiency of the display panel is further improved.
The display panel device of the embodiment of the present application includes the display panel of any embodiment of the first aspect. The display panel is provided with a light extraction structure, the pixel light-emitting unit is arranged in the pixel area, and the light extraction structures are arranged in the non-pixel area, so that normal light extraction in the pixel light-emitting unit area is not influenced; the filling layer covers each light taking-out structure in the light taking-out layer, the refractive index of the material of the filling layer is larger than that of the material of the light taking-out structure, the light taking-out structure can change the path of light rays which are incident on the light taking-out structure and carry out total reflection, so that some lost light rays which are originally lost in the display panel are emitted from the display panel, the light emitting loss is reduced, and the light taking-out efficiency of the display panel is improved; the plurality of light taking-out structures are located on at least one side of the single pixel area, so that more loss light rays are totally reflected on the light taking-out structures, the light taking-out efficiency of the display panel is further improved, and the light taking-out efficiency of the display device is further improved.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
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 some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by referring to these drawings.
FIG. 1 is a cross-sectional view of a display panel according to an embodiment of the present application;
fig. 2 is a first layout view of a light extraction structure according to an embodiment of the present application (single pixel light emitting unit, single-turn surrounding);
fig. 3 is a second layout view of a light extraction structure according to an embodiment of the present application (single pixel light emitting cell, double-turn surrounding contact arrangement);
fig. 4 is a third layout view of a light extraction structure according to an embodiment of the present application (single pixel light emitting unit, double-turn arrangement around the space);
fig. 5 is a fourth layout view of a light extraction structure (a plurality of pixel light emitting units, a single turn arranged circumferentially) according to an embodiment of the present application;
fig. 6 is a fifth arrangement diagram (a plurality of pixel light emitting units, arranged in a double-circle surrounding manner) of a light extraction structure according to an embodiment of the present application;
FIG. 7 is a partial cross-sectional view taken along line C-C of FIG. 3;
fig. 8 is a layout diagram of a light extraction structure of an embodiment of the present application in a trapezoidal shape;
fig. 9 is an optical path diagram of a light extraction structure of an embodiment of the present application in the shape of a hemisphere;
fig. 10 is a light path diagram of a light extraction structure in the shape of a cylinder according to an embodiment of the present application;
FIG. 11 is a light path diagram of a light extraction structure in the form of a cylinder with a spherical top surface according to an embodiment of the present application;
fig. 12 is an optical path diagram of the light extraction structure of the embodiment of the present application in the shape of a trapezoid (with the trapezoid facing forward);
fig. 13 is another optical path diagram of the light extraction structure of the embodiment of the present application in the shape of a trapezoid (trapezoid inverted).
Description of reference numerals:
a display panel 1; a pixel region A; a non-pixel region B;
a substrate 10;
a pixel light emitting layer 20; a pixel light emitting unit 21;
a light extraction layer 30; the light extraction structure 31;
a filling layer 40; an encapsulation layer 50; a cover plate 60; a rubber frame 70; a pixel defining layer 80.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by those skilled in the art based on the description, are within the scope of the present invention.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "in ...below" may include both upper and lower orientations. The device may be otherwise oriented, such as rotated 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
The Display panel may be an OLED (Organic Light Emitting semiconductor) Display panel and a QLED (Quantum Dot Light Emitting diode) Display panel, and the Display panel has a Light Emitting side, as shown in fig. 1, where the Light Emitting side is the direction of the cover plate 60.
As shown in fig. 1 and fig. 2, an embodiment of the first aspect of the present application proposes a display panel 1, which includes a plurality of pixel regions a and a non-pixel region B outside the pixel regions a; the display panel 1 includes a substrate 10, a pixel light emitting layer 20, a light extraction layer 30, and a filling layer 40; the pixel light emitting layer 20 is disposed at one side of the substrate 10, and the pixel light emitting layer 20 includes a plurality of pixel light emitting units 21 disposed at intervals; each pixel light emitting unit 21 corresponds to one pixel region a, and the interval region between the pixel light emitting units 21 corresponds to the non-pixel region B; the light extraction layer 30 is disposed on a side of the pixel light emitting layer 20 away from the substrate 10, the light extraction layer 30 including a plurality of light extraction structures 31; the plurality of light extraction structures 31 are disposed in the non-pixel region B, and the plurality of light extraction structures 31 are located at least one side of the single pixel region a; the filling layer 40 is arranged on the side of the light extraction layer 30 away from the substrate 10; the filling layer 40 covers each light extraction structure 31 in the light extraction layer 30; the refractive index of the material of the filling layer 40 is larger than that of the material of the light extraction structure 31.
The display panel 1 of the embodiment of the present application has a pixel area a and a non-pixel area B, the display panel 1 includes a substrate 10, a pixel light emitting layer 20, a light extraction layer 30, and a filling layer 40, the pixel light emitting layer 20 includes a plurality of pixel light emitting units 21 arranged at intervals, the light extraction layer 30 includes a plurality of light extraction structures 31, the pixel light emitting units 21 are arranged in the pixel area a, the plurality of light extraction structures 31 are arranged in the non-pixel area B, the plurality of light extraction structures 31 are located on at least one side of a single pixel area a, the filling layer 40 covers each light extraction structure 31 in the light extraction layer 30, and a refractive index of a material of the filling layer 40 is greater than a refractive index of a material of the light extraction structures 31. In general, a part of light emitted from the pixel light-emitting unit 21 is emitted from the light-emitting side of the display panel 1, and the rest is lost in the display panel 1. The light extraction structures 31 are arranged in the display panel 1, the pixel light-emitting units 21 are arranged in the pixel area A, and the plurality of light extraction structures 31 are arranged in the non-pixel area B, so that the normal light extraction in the area of the pixel light-emitting units 21 is not influenced; the filling layer 40 covers each light extraction structure 31 in the light extraction layer 30, the refractive index of the material of the filling layer 40 is greater than that of the material of the light extraction structure 31, the light extraction structure 31 can change the path of the light rays emitted thereto, when the light rays are emitted onto the light extraction structure 31 through the filling layer 40 and the incident angle is greater than the critical angle, the incident light rays can be totally reflected on the reflection surface of the light extraction structure 31, so that some light rays which are originally lost in the display panel 1 are emitted from the light emission side of the display panel 1, the light emission loss is reduced, and the light extraction efficiency of the display panel 1 is improved; and the plurality of light extraction structures 31 are located on at least one side of the single pixel region a, so that more lost light rays are totally reflected on the light extraction structures 31, the light extraction efficiency of the display panel 1 is further improved, and the product performance is improved.
Specifically, the refractive index of the material of the filling layer 40 may be n 1 The refractive index of the material of the light extraction structure 31 may be n > 1.7 2 < 1.6, when n 1 ＝1.7、n 2 When 1.6, the critical angle is
Total reflection can occur as long as the angle of incidence α is greater than the critical angle.
Specifically, the pixel light emitting unit 21 may be an EL element, such as an OLED or a QLED, which can emit light.
In some embodiments of the present application, as shown in fig. 2 to 6, the orthographic projection of the plurality of light extraction structures 31 on the substrate 10 surrounds the orthographic projection of the single pixel light emitting unit 21 on the substrate 10, and the adjacent light extraction structures 31 are disposed in contact or spaced apart. Among them, fig. 2, 3, 5, and 6 show the case where adjacent light extraction structures 31 are disposed in contact; fig. 4 shows a case where adjacent light extraction structures 31 are provided at intervals. The lost light emitted by the pixel light-emitting unit 21 is in multiple directions, and the orthographic projection of the multiple light extraction structures 31 on the substrate 10 surrounds the orthographic projection of a single pixel light-emitting unit 21 on the substrate 10, so that the arrangement mode can reflect the lost light at more angles; adjacent light extraction structure 31 contact setting or interval setting, when the contact sets up, because the clearance between the light extraction structure 31 is little, or does not have the clearance, can reflect more loss light, and the interval sets up material saving more, is convenient for control cost when realizing reflection loss light.
In some embodiments of the present application, as shown in fig. 2 to 6, the plurality of light extraction structures 31 form a single-turn surrounding arrangement or a multi-turn surrounding arrangement for a single pixel region a. Fig. 2 and 5 show a case where the plurality of light extraction structures 31 form a single-turn surrounding arrangement for a single pixel region a; fig. 3, 4 and 6 show the case where the plurality of light extraction structures 31 form a double-turn surrounding arrangement for a single pixel region a. The plurality of light extraction structures 31 are arranged in a single-turn surrounding manner for a single pixel region a, so that reflection of lost light can be realized, and the plurality of light extraction structures 31 are arranged in a multi-turn surrounding manner, so that more lost light can be reflected due to the increase of the light extraction structures 31.
In some embodiments of the present application, the height of the light extraction structures 31 is greater than the spacing distance between adjacent light extraction structures 31. So set up, can reflect more loss light, again can effective control light take out the quantity of structure 31, do benefit to the control cost. Specifically, as shown in fig. 3 and 4, two circles of light extraction structures 31 may be provided, and the light extraction structures 31 may be hemispheres having a diameter of 9 μm and a height of 4.5 μm, and may be provided with an interval of 2.5 μm therebetween.
In some embodiments of the present application, as shown in fig. 3, 4, 7 and 8, in the case that a plurality of light extraction structures 31 form a multi-turn surrounding arrangement for a single pixel region a, the light extraction structures 31 of different turns are staggered. There may be a gap between the light extraction structures 31 in the same circle, and the light extraction structures 31 in different circles are arranged in a staggered manner, so that the loss light rays at more angles can be reflected, and the light extraction efficiency can be improved.
As shown in fig. 5 and 6, the adjacent plural pixel light emitting units 21 may share the respective surrounding light extraction structures 31.
In some embodiments of the present application, as shown in fig. 8 to 13, the light extraction structure 31 is shaped as one or more of a hemisphere, a cylinder, a trapezoid, or a cylinder with a hemispherical top end. Among them, fig. 8, 12, and 13 show a case where the light extraction structure 31 is a trapezoidal body; fig. 9 shows a case where the light extraction structure 31 is a hemisphere; fig. 10 shows a case where the light extraction structure 31 is a cylinder; fig. 11 shows a case where the light extraction structure 31 is a cylinder having a hemispherical top end.
The shape of the light extraction structure 31 can be selected according to actual needs, one type of light extraction structure can be selected, multiple types of light extraction structures can be selected to be used in a matched manner, and the arrangement mode is flexible. Specifically, the following arrangement modes may be adopted when the light extraction structure 31 is provided: the plane of the hemisphere is parallel to the substrate 10, the end surface of the cylinder is parallel to the substrate 10, the top surface and the bottom surface of the trapezoid are parallel to the substrate 10, the plane of the cylinder with the hemispherical top end is parallel to the substrate 10, and fig. 9 to 13 show the reflection of the light rays by the different light extraction structures 31, in the figure, the incident angle of the light emitted by the pixel light emitting unit 21 to the light extraction structure 31 is α, and the reflection angle of the light extraction structure 31 to the incident light rays is β.
In some embodiments of the present application, the plurality of light extraction structures 31 are all the same, partially the same, or all different in shape and size. In the process of manufacturing the display panel 1, the light extraction structures 31 having the same shape and size may be all selected, the light extraction structures 31 having the same shape and size may be partially selected, the light extraction structures 31 having different shapes and sizes may be selected for the rest of the light extraction structures 31, or the light extraction structures 31 having different shapes and sizes may be all selected for use according to actual conditions, and the setting mode is more flexible.
In some embodiments of the present application, as shown in fig. 1, the light extraction structure 31 has a first reflective surface for receiving the incident light from the filling layer 40, and an included angle θ between the first reflective surface and the substrate 10 satisfies the following range: theta is more than or equal to 90 degrees and less than 180 degrees. The larger the included angle between the first reflecting surface and the substrate 10 is, the larger the included angle between the incident light and the normal is, and more lost light can be totally reflected on the first reflecting surface, so that when the included angle theta between the first reflecting surface and the substrate 10 satisfies that theta is more than or equal to 90 degrees and less than 180 degrees, more lost light can be reflected, and the light extraction efficiency of the display panel 1 is improved.
In some embodiments of the present application, as shown in fig. 1, the display panel 1 further includes: an encapsulation layer 50, the encapsulation layer 50 being disposed between the light extraction layer 30 and the pixel light emitting layer 20, covering each pixel light emitting unit 21 in the pixel light emitting layer 20; the refractive index of the material of the encapsulation layer 50 is smaller than the refractive index of the material of the light extraction structure 31; the bottom end of each light extraction structure 31 in the light extraction layer 30 is in contact with the encapsulation layer 50. The encapsulation layer 50 has a protective effect on the light extraction layer 30 and can isolate water and oxygen; the bottom end of each light extraction structure 31 in the light extraction layer 30 is in contact with an encapsulation layer 50, the encapsulation layer 50 providing a base for forming the light extraction layer 30; the light emitted by the pixel light-emitting unit 21 enters the filling layer 40 through the packaging layer 50 and is emitted to the light extraction structure 31, and when the refractive index of the material of the packaging layer 50 is smaller than that of the material of the light extraction structure 31, the light is refracted when entering the filling layer 40 from the packaging layer 50, and the incident angle is larger than the refraction angle, so that the incident angle of the light emitted to the light extraction structure 31 is increased, part of the light which cannot be totally reflected originally is totally reflected, more lost light is emitted from the light-emitting side, and the light extraction efficiency is improved.
Specifically, the encapsulation layer 50 may be one or more of SiNx (silicon nitride), sion (silicon oxynitride) and SiOx (silicon oxide), and specifically, the encapsulation layer 50 may be a stack of SiNx and SiOx, where a layer closest to the light extraction layer 30 is made of a low refractive index material SiOx, and the refractive index is 1.5.
In some embodiments of the present application, as shown in fig. 1, the display panel 1 further includes: a cover plate 60 and a rubber frame 70, the cover plate 60 being disposed on a side of the light extraction layer 30 away from the substrate 10; the rubber frame 70 is provided with a surrounding side wall, and the top end and the bottom end of the side wall are respectively abutted against the cover plate 60 and the base plate 10, so that the cover plate 60, the rubber frame 70 and the base plate 10 form an accommodating cavity; the pixel light emitting layer 20, the light extraction layer 30, and the filling layer 40 are disposed within the receiving cavity. Specifically, the glue frame 70 may be UV glue; the filling layer 40 may be an adhesive layer for adhering the cover plate 60; the substrate 10 may be a TFE (Thin Film Encapsulation) board.
In some embodiments of the present application, as shown in fig. 1, the display panel 1 further includes a PDL (pixel definition layer 80), and the pixel definition layer 80 is disposed in the same layer as the pixel light emitting layer 20 to define a pixel region a and a non-pixel region B. The pixel defining layer 80 may have an arc slope with a slope angle of 45 °, and the pixel contact layer is opened with an opening in which the pixel light emitting layer 20 is disposed.
An embodiment of a second aspect of the present application proposes a display device, comprising the display panel 1 of any of the embodiments of the first aspect.
The display panel 1 device of the embodiment of the present application includes the display panel 1 of any embodiment of the first aspect. The light extraction structures 31 are arranged in the display panel 1, the pixel light-emitting units 21 are arranged in the pixel area A, and the plurality of light extraction structures 31 are arranged in the non-pixel area B, so that the normal light extraction in the area of the pixel light-emitting units 21 is not influenced; the filling layer 40 covers each light extraction structure 31 in the light extraction layer 30, the refractive index of the material of the filling layer 40 is greater than that of the material of the light extraction structure 31, and the light extraction structure 31 can change the path of the light rays emitted thereto, so that when the light rays are emitted onto the light extraction structure 31 through the filling layer 40 and the incident angle is greater than the critical angle, the incident light rays are totally reflected on the reflection surface of the light extraction structure 31, so that some light rays which are originally lost in the display panel 1 are emitted from the light emission side of the display panel 1, the light emission loss is reduced, and the light extraction efficiency of the display panel 1 is improved; and the plurality of light extraction structures 31 are located on at least one side of the single pixel region a, so that more loss light rays are totally reflected on the light extraction structures 31, the light extraction efficiency of the display panel 1 is further improved, and the light extraction efficiency of the display device is further improved.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "...," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A display panel includes a plurality of pixel regions and a non-pixel region outside the pixel regions;
the display panel includes: a substrate, a pixel light emitting layer, a light extraction layer and a filling layer;
the pixel light-emitting layer is arranged on one side of the substrate and comprises a plurality of pixel light-emitting units arranged at intervals; each pixel light-emitting unit corresponds to one pixel area, and a spacing area between the pixel light-emitting units corresponds to the non-pixel area;
the light extraction layer is arranged on one side of the pixel light-emitting layer far away from the substrate and comprises a plurality of light extraction structures; the plurality of light extraction structures are disposed in the non-pixel region and the plurality of light extraction structures are located on at least one side of a single pixel region;
the filling layer is arranged on one side of the light extraction layer, which is far away from the substrate; the filling layer covers each of the light extraction structures in the light extraction layer; the refractive index of the material of the filling layer is greater than the refractive index of the material of the light extraction structure.
2. The display panel according to claim 1, wherein an orthographic projection of a plurality of the light extraction structures on the substrate surrounds an orthographic projection of a single pixel light emitting unit on the substrate, and wherein adjacent light extraction structures are disposed in contact or spaced apart.
3. The display panel according to claim 1 or 2, wherein the plurality of light extraction structures form a single-turn or multi-turn surrounding arrangement for a single pixel region.
4. The display panel of claim 3, wherein the plurality of light extraction structures form a plurality of circles around the single pixel region, and the light extraction structures of different circles are staggered.
5. The display panel according to claim 1, wherein the light extraction structures have one or more of a hemispherical shape, a cylindrical shape, a trapezoidal shape, or a cylindrical shape having a hemispherical top end.
6. The display panel of claim 2 wherein the height of the light extraction structures is greater than the separation distance between adjacent light extraction structures.
7. The display panel of claim 1, wherein the light extraction structure has a first reflective surface for receiving incident light from the filling layer, and an included angle θ between the first reflective surface and the substrate satisfies the following range: theta is more than or equal to 90 degrees and less than 180 degrees.
8. The display panel according to claim 1,
the display panel further includes: an encapsulation layer disposed between the light extraction layer and the pixel light emitting layers, covering each of the pixel light emitting cells in the pixel light emitting layers; a refractive index of a material of the encapsulation layer is less than a refractive index of a material of the light extraction structure;
the bottom end of each light extraction structure in the light extraction layer is in contact with the encapsulation layer.
9. The display panel according to claim 1, characterized in that the display panel further comprises: the cover plate is arranged on one side, far away from the substrate, of the light extraction layer; the rubber frame is provided with a surrounding side wall, and the top end and the bottom end of the side wall are respectively abutted against the cover plate and the base plate, so that the cover plate, the rubber frame and the base plate form an accommodating cavity; the pixel light emitting layer, the light extraction layer and the filling layer are arranged in the accommodating cavity.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211456640.4A CN115988909A (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211456640.4A CN115988909A (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115988909A true CN115988909A (en) | 2023-04-18 |
Family
ID=85972775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211456640.4A Pending CN115988909A (en) | 2022-11-21 | 2022-11-21 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115988909A (en) |
-
2022
- 2022-11-21 CN CN202211456640.4A patent/CN115988909A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209785979U (en) | OLED display device and electronic equipment | |
| US20230087942A1 (en) | Display panel and method of fabricating the same | |
| US11871606B2 (en) | Display substrate and display device | |
| US8987767B2 (en) | Light emitting device having improved light extraction efficiency | |
| US10068952B2 (en) | Display device having a recess portion in an insulating film and a light emitting layer | |
| JP4642823B2 (en) | Illumination device and liquid crystal display device | |
| WO2016127581A1 (en) | Pixel structure, display device, and method for fabricating pixel structure | |
| TW201729444A (en) | Organic light emitting display device and method for manufacturing the same | |
| US10269777B2 (en) | Display apparatus comprising reflection structure | |
| US20190221780A1 (en) | Light extraction apparatus and methods for oled displays and oled displays using same | |
| US20130119352A1 (en) | Multi-structure cathode for flexible organic light emitting diode (oled) device and method of making same | |
| CN111628107B (en) | Display panel | |
| CN110828517A (en) | Display substrate, manufacturing method thereof and display device | |
| KR20180035987A (en) | Organic Light Emitting Diode Display Device | |
| CN113875035A (en) | Display device | |
| US7915805B2 (en) | Organic electroluminescent display and method of manufacture | |
| CN113078193B (en) | Display panel and display device | |
| EP3618113B1 (en) | Display device | |
| CN115988909A (en) | Display panel and display device | |
| US10483337B2 (en) | Organic light emitting display device and method of manufacturing the same | |
| US20210202913A1 (en) | Light extraction apparatus and flexible oled displays | |
| KR102608318B1 (en) | Organic Light Emitting Device | |
| CN115377320A (en) | Display panel and display device | |
| JP6804591B2 (en) | Display device | |
| CN111599932B (en) | OLED display panel and OLED display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |