CN111834545A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111834545A CN111834545A CN202010621791.5A CN202010621791A CN111834545A CN 111834545 A CN111834545 A CN 111834545A CN 202010621791 A CN202010621791 A CN 202010621791A CN 111834545 A CN111834545 A CN 111834545A
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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
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The invention discloses a display panel and a display device, belonging to the technical field of display, wherein the display panel comprises a substrate, an array layer, a planarization layer, a light-emitting device layer, a pixel definition layer and a packaging layer, wherein the light-emitting device comprises a first electrode, a light-emitting part and a second electrode which are positioned on one side of the planarization layer, which is far away from the substrate; the pixel defining layer includes a plurality of openings exposing the first electrodes; the film layer where the reflection parts are located is located on one side, far away from the substrate, of the planarization layer, and the orthographic projections, towards the light-emitting surface of the display panel, of at least part of the reflection parts are located between the orthographic projections, towards the light-emitting surface of the display panel, of the two adjacent openings. The display device comprises the display panel. The plurality of reflecting parts can reuse light which is possibly lost in the organic material film and the glass substrate as much as possible, and reflect the light to the light-emitting surface of the display panel for emitting, so that the light-emitting efficiency of the panel is improved, and the power consumption of the panel is reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the continuous development of Display technology, the manufacturing technology of Display panels also tends to mature, and the existing Display panels mainly include Organic Light Emitting Display panels (OLEDs), liquid crystal Display panels (LCDs), Plasma Display Panels (PDPs), and the like. The organic light emitting display device as the self light emitting display device does not require a separate light source. Accordingly, the organic light emitting display device can operate at a low voltage, is light and thin, and provides high quality characteristics such as a wide viewing angle, high contrast, and fast response. Therefore, organic light emitting display devices have been receiving attention as next generation display devices. Organic Light-Emitting diodes (OLEDs) are used as Light sources for display devices and lighting devices, and have low power consumption, high resolution, fast response, and other excellent photoelectric characteristics, and are becoming the mainstream technology of OLED display.
In an OLED device with a conventional structure, due to the difference in optical properties of different functional layer materials, light can be lost inside the device in a form of total reflection, only about 20% to 30% of light emitted by an OLED organic light emitting layer can be transmitted through glass, most of the light is lost in an organic material thin film and a glass substrate in a mode of guided wave, for example, light rays of fresnel reflection (when a line of sight is perpendicular to a surface, the reflection is weak, and when the line of sight is not perpendicular to the surface, the included angle is smaller, the reflection is more obvious) between the film layers are lost, so that the light extraction efficiency is low, and the light loss inside the device is too large, thereby affecting the light emitting efficiency and related optical performance of the OLED device.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a display panel and a display device capable of improving light extraction efficiency and reducing panel power consumption.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display apparatus, so as to solve the problems in the prior art that the light emitting efficiency of an OLED device is low, the loss of light inside the device is too large, and the light emitting efficiency and the related optical performance of the OLED device are affected.
The invention discloses a display panel, comprising: a substrate; the array layer is positioned on one side of the substrate; the planarization layer is positioned on one side of the array layer, which is far away from the substrate; the light-emitting device layer is positioned on one side, far away from the substrate, of the planarization layer; the light-emitting device layer comprises a pixel defining layer and a plurality of light-emitting devices arranged in an array mode, and each light-emitting device comprises a first electrode, a light-emitting part and a second electrode, wherein the first electrode, the light-emitting part and the second electrode are positioned on one side, far away from the substrate, of the planarization layer; the pixel defining layer includes a plurality of openings exposing the first electrodes; the packaging layer is positioned on one side of the light-emitting device layer, which is far away from the substrate; the film layer where the reflection parts are located is located on one side, far away from the substrate, of the planarization layer, and the orthographic projections, towards the light-emitting surface of the display panel, of at least part of the reflection parts are located between the orthographic projections, towards the light-emitting surface of the display panel, of the two adjacent openings.
Based on the same inventive concept, the invention also discloses a display device comprising the display panel.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the side of the planarization layer, which is far away from the substrate, is also provided with a plurality of reflection parts, and the orthographic projection of at least part of the reflection parts to the light-emitting surface of the display panel is positioned between the orthographic projections of two adjacent openings to the light-emitting surface of the display panel, namely, when the display panel is manufactured, after the planarization layer is paved, the film layer where the reflection parts are positioned can be paved, and the film layer where the reflection parts are positioned is patterned to obtain a plurality of reflection parts, wherein the orthographic projection of at least part of the reflection parts to the light-emitting surface of the display panel is positioned between the orthographic projections of two adjacent openings to the light-emitting surface of the display panel, namely, the display panel can be provided with the reflection parts only at the positions where certain light rays are. The plurality of reflecting parts can reuse light which is possibly lost in the organic material film and the glass substrate as much as possible, and reflect the light to the light-emitting surface of the display panel for emitting, so that the light-emitting efficiency of the panel is improved, and the power consumption of the panel is reduced.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 4 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 5 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 6 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
fig. 7 is a schematic top view of a reflective portion of a display panel according to an embodiment of the invention;
FIG. 8 is a schematic view of an alternative cross-sectional configuration taken along line A-A' of FIG. 1;
FIG. 9 is a schematic view of an alternative cross-sectional configuration taken along line A-A' of FIG. 1;
FIG. 10 is a schematic view of an alternative cross-sectional configuration taken along line A-A' of FIG. 1;
fig. 11 is a schematic plan view of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1-2, fig. 1 is a schematic plan view illustrating a display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional view along a direction a-a' in fig. 1, and a display panel 000 according to an embodiment of the present invention includes:
a substrate 10;
an array layer 20 located on one side of the substrate 10;
the planarization layer 30 is positioned on one side of the array layer 30 away from the substrate 10;
a light emitting device layer 40 on a side of the planarization layer 30 away from the substrate 10; the light emitting device layer 40 includes a pixel defining layer 50 and a plurality of light emitting devices 401 arranged in an array, the light emitting devices 401 including a first electrode 401A, a light emitting portion 401B, and a second electrode 401C on a side of the planarization layer 30 away from the substrate 10; the pixel defining layer 50 includes a plurality of openings 501 exposing the first electrodes 401A;
an encapsulation layer 60 located on a side of the light emitting device layer 40 away from the substrate 10;
the reflection portion 70 is located on a side of the planarization layer 30 away from the substrate 10, and an orthogonal projection of at least a part of the reflection portion 70 to the light emitting surface E of the display panel 000 is located between orthogonal projections of two adjacent openings 501 to the light emitting surface E of the display panel 000.
Specifically, the display panel provided by this embodiment may be an organic light emitting display panel, which has the advantages of self-luminescence, high brightness, wide viewing angle, and fast response, and a backlight is not required, and a thin organic material coating and a glass substrate may be used. The substrate 10 of this embodiment may be used as a carrier for carrying other structures of the display panel 000, and the substrate may be a glass substrate, and may also be a flexible substrate, which is not limited in this embodiment. The array layer 20 on one side of the substrate 10 may include a gate metal layer, a source/drain metal layer, an active layer, and an insulating layer (not shown) between the conductive film layers for forming a light emitting control unit of the light emitting device 401 of the light emitting device layer 40. And a planarization layer 30 located on a side of the array layer 20 away from the substrate 10, wherein the planarization layer 30 is used for planarizing the surface of the array layer 20. The pixel defining layer 50 located on the side of the planarization layer 30 away from the substrate 10 is used to define the arrangement positions of the light emitting devices 401 of the light emitting device layer 40, the pixel defining layer 50 may include a plurality of openings 501, the openings 501 may penetrate at least through the pixel defining layer 50 along the direction in which the pixel defining layer 50 points perpendicularly to the substrate 10, and the light emitting devices 401 of the light emitting device layer 40 are arranged in each opening 501, that is, the forward projection of the light emitting devices 401 to the light emitting surface E of the display panel 000 and the forward projection of the openings 501 to the light emitting surface E of the display panel 000 overlap each other. Each light-emitting device 401 includes a first electrode 401A, a light-emitting portion 401B, and a second electrode 401C on the side of the planarization layer 30 away from the substrate 10; each opening 501 of the pixel defining layer 50 is configured to expose a first electrode 401A of the light emitting device 401, optionally, the first electrode 401A may be an anode, and the second electrode 401C may be a cathode, when a current passes through the first electrode 401A and the second electrode 401C and forms an electric field between the first electrode 401A and the second electrode 401C, the light emitting portion 401B emits light, and a light emitting principle of the light emitting device 401 can be understood with reference to a structure and a principle of an organic light emitting device in the related art, which is not described herein again. The encapsulation layer 60 is located on a side of the light emitting device layer 40 away from the substrate 10, and is used for encapsulating and protecting the light emitting device 401 of the light emitting device layer 40, and optionally, the encapsulation layer 60 may include a stack structure of an inorganic layer, an organic layer, and a plurality of film layers of the inorganic layer.
In this embodiment, a plurality of reflection portions 70 are further disposed on a side of the planarization layer 30 away from the substrate 10, and orthogonal projections of at least part of the reflection portions 70 to the light-emitting surface E of the display panel 000 are located between orthogonal projections of two adjacent openings 501 to the light-emitting surface E of the display panel 000, that is, when the display panel of this embodiment is manufactured, after the planarization layer 30 is laid, a film layer where the reflection portions 70 are located may be laid, and the film layer where the reflection portions 70 are located may be patterned to obtain a plurality of reflection portions 70, where the orthogonal projections of at least part of the reflection portions 70 to the light-emitting surface E of the display panel 000 are located between orthogonal projections of two adjacent openings 501 to the light-emitting surface E of the display; optionally, the display panel of this embodiment may only have the reflective portion 70 at a position where some light rays are reflected and collected, which is beneficial to reducing reflective materials and saving cost. The plurality of reflection portions 70 of the embodiment may reuse light (especially light with a large viewing angle, which is easily reflected by fresnel, and light not emitted perpendicularly from the light emitting device layer, such as light M in fig. 2) that may be lost in the organic material film and the glass substrate as much as possible, and reflect the light back to the light emitting surface E of the display panel 000 for emission, thereby facilitating improvement of light emitting efficiency of the panel and reduction of power consumption of the panel.
It should be noted that fig. 1-2 of this embodiment only schematically illustrate the structure of the display panel 000, and in a specific implementation, the structure of the display panel is not limited thereto, and may also include other structures capable of implementing the function of the organic display panel, such as film layer structures of each insulating layer, passivation layer, and cover plate (not filled in the figures) on the side of the encapsulation layer 60 away from the substrate 10.
In some alternative embodiments, please refer to fig. 1 and fig. 3 in combination, fig. 3 is a schematic cross-sectional view along a-a 'direction in fig. 1, fig. 4 is a schematic cross-sectional view along a-a' direction in fig. 1, in this embodiment, the display panel 000 further includes an optical structure layer 80, and the optical structure layer 80 is located on a side of the encapsulation layer 60 away from the substrate 10;
the optical structure layer 80 includes a plurality of microlens units 800, and a forward projection of the microlens units 800 to the light-emitting surface E of the display panel 000 at least partially overlaps with a forward projection of the opening 501 to the light-emitting surface E of the display panel 000; the microlens unit 800 serves to converge light entering the microlens unit 800 toward a side away from the substrate 10. Alternatively, the front projection of the microlens unit 800 to the light-emitting surface E of the display panel 000 and the front projection of the opening 501 to the light-emitting surface E of the display panel 000 may only partially overlap (as shown in fig. 4), or the front projection of the microlens unit 800 to the light-emitting surface E of the display panel 000 may completely cover the front projection of the opening 501 to the light-emitting surface E of the display panel 000 (as shown in fig. 3).
In the display panel 000 provided in this embodiment, the optical structure layer 80 is further disposed on the side of the encapsulation layer 60 away from the substrate 10, the optical structure layer 80 may include a plurality of microlens units 800, and a forward projection of the microlens units 800 to the light-emitting surface E of the display panel 000 at least partially overlaps a forward projection of the opening 501 to the light-emitting surface E of the display panel 000, because the related art is limited by the light-emitting efficiency of the light-emitting device 401, and after light emitted from the light-emitting device 401 passes through the encapsulation layer 60 and other film layers above the light-emitting device, the difference in refractive index of each film layer and the reason of reflection of the film layer cause the low light-emitting efficiency of the display panel 000, and further affect the power consumption and the lifetime of the panel, in this embodiment, the optical structure layer 80 including a plurality of microlens units 800 is disposed on the side of the encapsulation layer 60 away from the substrate 10, and the forward projection of the microlens units 800 to the light, the light entering the microlens unit 800 is converged toward a side away from the substrate 10 by the microlens unit 800, so that the light path of the emergent light that is originally totally reflected on the emergent surface E (air interface) of the display panel 000 is changed, and the emergent light can be emitted from the emergent surface E of the display panel 000 normally, thereby improving the light-emitting efficiency of the display panel 000.
It should be noted that, in this embodiment, the shape and structure of the microlens unit 800 are not specifically limited, and may be any one of a convex lens or a concave lens, and only the light entering the microlens unit 800 needs to be converged toward a side away from the substrate 10, so that the light path of the emergent light that is originally totally reflected on the emergent surface E (air interface) of the display panel 000 is changed, and the emergent light can be normally emitted from the emergent surface E of the display panel 000, and the light-emitting efficiency of the panel is improved.
In some optional embodiments, please continue to refer to fig. 1 and fig. 3, in this embodiment, the optical structure layer 80 includes a first optical structure layer 801 and a second optical structure layer 802, in a direction Z perpendicular to the light emitting surface E of the display panel 000, the second optical structure layer 802 covers the first optical structure layer 801, and the microlens unit 800 is located on the first optical structure layer 801; the refractive index of the first optical structure layer 801 is smaller than that of the second optical structure layer 802.
The present embodiment further explains that the optical structure layer 80 may include a first optical structure layer 801 and a second optical structure layer 802 which are stacked, in a direction Z perpendicular to the light-emitting surface E of the display panel 000, the second optical structure layer 802 covers the first optical structure layer 801, the microlens unit 800 is located on the first optical structure layer 801, the refractive index of the first optical structure layer 801 is smaller than the refractive index of the second optical structure layer 802, and further, by matching the refractive indexes of the optical structure layers of different film layers, more light entering the microlens unit 800 is converged toward a side far away from the substrate 10, so that the light path of the emergent light which is originally reflected totally at the light-emitting surface E (air interface) of the display panel 000 is changed, and the emergent light from the light-emitting surface E of the display panel 000 can be emitted normally, and the light-emitting surface E of the display panel 000 can achieve the effect of high-, the utilization efficiency of light is improved, and meanwhile, the power consumption of the panel is saved, and the service life of the display panel is prolonged.
Alternatively, as shown in fig. 3, the plurality of microlens units 800 of the optical structure layer 80 may be a concave lens structure, where the refractive index of the first optical structure layer 801 is smaller than the refractive index of the second optical structure layer 802, and the second optical structure layer 802 is located on a side of the first optical structure layer 801 away from the substrate 10, that is, the second optical structure layer 802 is formed on the first optical structure layer 801 and the second optical structure layer 802 covers the first optical structure layer 801 including the plurality of concave lens structures.
In a direction Z perpendicular to the light emitting surface E of the display panel 000, the microlens unit 800 includes a first surface 800A and a second surface 800B that are disposed opposite to each other, where the first surface 800A is a surface of the microlens unit 800 close to the substrate 10, and the second surface 800B is a surface of the microlens unit 800 away from the substrate 10;
the first surface 800A is attached to the encapsulation layer 60, and the second surface 800B includes a plurality of recesses facing one side close to the substrate 10, forming a concave lens structure.
The surface (i.e. the second surface 800B) of the microlens unit 800 far away from the substrate 10 includes a plurality of recesses facing the first optical structure layer 801, the second optical structure layer 802 is formed on the first optical structure layer 801 and covers the first optical structure layer 801, i.e. the second optical structure layer 802 is correspondingly provided with a plurality of protrusions at a plurality of recess positions, each protrusion of the second optical structure layer 802 is embedded in each recess of the first optical structure layer 801, so as to form the microlens unit 800 with a plurality of concave lens structures, because the refractive index of the first optical structure layer 801 is smaller than that of the second optical structure layer 802, after the light beam M is refracted at the second surface 800B of the microlens unit 800, when the light beam is incident from the medium with a small refractive index into the medium with a large refractive index, the refraction angle of the second optical structure layer 802 is smaller than that of the light beam M incident at the first optical structure layer 801 (when the light beam, in a medium with a large refractive index, the included angle between the light and the normal is small), and then the microlens unit 800 of the concave lens structure can converge the light entering the microlens unit 800 to the side far away from the substrate 10, so that the light path of the emergent light that is originally totally reflected at the emergent face E (air interface) of the display panel 000 is changed, the emergent light can be emitted from the emergent face E of the display panel 000 normally, and the light emitting efficiency of the panel is improved.
It should be noted that fig. 3 of this embodiment only schematically illustrates that the recess on the second surface 800B of the microlens unit 800 toward the side close to the substrate 10 is in an arc shape, but is not limited thereto, and may also be in other shapes, as shown in fig. 5, fig. 5 is another schematic cross-sectional structure diagram in the direction of a-a' in fig. 1, the shape of the recess on the second surface 800B of each microlens unit 800 toward the side close to the substrate 10 may also be in the shape of fig. 5, the side wall of the recess is in a vertical plane shape, and the bottom of the recess may be in an arc shape, and only needs to be able to converge the light entering the microlens unit 800 toward the side away from the substrate 10, and this embodiment is not particularly limited.
In some alternative embodiments, please continue to refer to fig. 1-5, in the present embodiment, the material of the optical structure layer 80 is an organic material.
The present embodiment further explains that the manufacturing material of the optical structure layer 80 is an organic material, and the selectable organic material may be a material of a series of acrylic, so that the refractive index difference between the first optical structure layer 801 with a low refractive index and the second optical structure layer 802 with a high refractive index is as large as possible, which is beneficial to realize that the light entering the microlens unit 800 is converged toward a side far away from the substrate 10 by the microlens unit 800, and thus the light path of the emergent light that is originally totally reflected on the light emitting surface E (air interface) of the display panel 000 is changed.
In some alternative embodiments, please refer to fig. 1 and fig. 6 in combination, fig. 6 is another schematic cross-sectional structure view along a direction a-a' in fig. 1, in this embodiment, the light emitting device layer 40 includes a plurality of light emitting devices 401 arranged in an array, and the light emitting devices 401 include a first electrode 401A, a light emitting portion 401B, and a second electrode 401C on a side of the planarization layer 30 away from the substrate 10; the film layer of the reflection portion 70 is located on the side of the planarization layer 30 away from the substrate 10, the orthographic projection of at least part of the reflection portion 70 to the light-emitting surface E of the display panel 000 is located between the orthographic projections of two adjacent openings 501 to the light-emitting surface E of the display panel 000, and the reflection portion 70 and the first electrode 401A are made of the same material in the same layer.
This embodiment further explains that since the first electrode 401A can be made of multiple stacked layers of metal and transparent conductive materials (which can be an ITO/Ag/ITO stacked arrangement, and the illustration of the first electrode 401A with a multiple-layer structure is not shown), the reflective portion 70 on the side of the planarization layer 30 away from the substrate 10 and the first electrode 401A of the light emitting device 401 also on the side of the planarization layer 30 away from the substrate 10 can be made of the same material in the same layer, that is, in the process of manufacturing the display panel 000, after the planarization layer 30 is laid, multiple metal film layers can be laid and patterned to obtain a partial reflective portion 70 with a forward projection between the forward projections of two adjacent openings 501 to the light-emitting surface E of the display panel 000 and a first electrode 401A with a forward projection overlapping with the forward projection of the opening 501 to the light-emitting surface E of the display panel 000, therefore, the light-emitting efficiency of the panel is improved, the process flow can be simplified, and the processing efficiency is improved.
In some optional embodiments, please refer to fig. 1 and fig. 6 in combination, in this embodiment, the film layer where the reflection portion 70 is located on a side of the planarization layer 30 away from the substrate 10, the orthographic projection of at least part of the reflection portion 70 to the light emitting surface E of the display panel 000 is located between the orthographic projections of two adjacent openings 501 to the light emitting surface E of the display panel 000, and the orthographic projection of at least part of the reflection portion 70 to the light emitting surface E of the display panel 000 and the orthographic projection of the light emitting device 401 to the light emitting surface E of the display panel 000 are overlapped; the first electrode 401A of the light emitting device 401 is multiplexed into the reflective portion 70.
This embodiment further explains that since the first electrode 401A can be made of a multi-layer stacked metal and transparent conductive material (which can be disposed in an ITO/Ag/ITO stacked manner, and the first electrode 401A is located on the side of the light emitting portion 401B close to the substrate 10, the first electrode 401A can be reused as the reflective portion 70, so that the orthographic projection of the partially reflective portion 70 to the light emitting surface E of the display panel 000 is located between the orthographic projections of the two adjacent openings 501 to the light emitting surface E of the display panel 000, and the orthographic projection of the partially reflective portion 70 to the light emitting surface E of the display panel 000 and the orthographic projection of the opening 501 to the light emitting surface E of the display panel 000 are overlapped with each other, so that the reflective portions 70 can be disposed on as many sides of the planarization layer 30 away from the substrate 10 as possible, the reflective area of the reflective portion 70 is increased, which is favorable for further increasing the reflection probability of light at the reflective portion 70, the light extraction efficiency of the display panel is further improved.
In some alternative embodiments, please continue to refer to fig. 1 and fig. 6, in this embodiment, the reflective portion 70 is a single metal film layer.
This embodiment further explains that the first electrode 401A can be made of a multi-layer stacked metal and transparent conductive material (which can be an ITO/Ag/ITO stacked structure, not shown, the multi-layer structure of the first electrode 401A is shown), and the first electrode 401A is located on the side of the light emitting portion 401B close to the substrate 10, so that a part of a single metal film layer of the first electrode 401A can be reused as the reflective portion 70, that is, the reflective portion 70 is a single metal film layer (single Ag or single Al layer) in the first electrode 401A, so that the orthographic projection of the partially reflective portion 70 to the light emitting surface E of the display panel 000 can be located between the orthographic projections of two adjacent openings 501 to the light emitting surface E of the display panel 000, the orthographic projection of the partially reflective portion 70 to the light emitting surface E of the display panel 000 and the orthographic projection of the opening 501 to the light emitting surface E of the display panel 000 are overlapped, and thus the reflective portion 70 can be located on the side of, the reflection area of the reflection part 70 is increased, which is beneficial to further improving the reflection probability of the light at the reflection part 70 and further improving the light-emitting efficiency of the display panel.
Optionally, as shown in fig. 7, fig. 7 is a schematic top view structure diagram of a reflection portion in a display panel according to an embodiment of the present invention, in this embodiment, partial reflection portions 70, of which orthographic projections are located between orthographic projections of two adjacent openings 501 toward a light emitting surface E of a display panel 000, may be connected to each other to form an entire hollowed-out structure, where the hollowed-out position is a setting position of the light emitting device 401, and partial reflection portions 70, of which orthographic projections and orthographic projections of the openings 501 toward the light emitting surface E of the display panel 000 are overlapped, are in a block structure (fig. 7 is a block, but not limited to a square block, but may also be in other blocks, such as a circular block, and this embodiment is not specifically limited), and correspond to the setting position of the light emitting device 401, so as to implement an effect of the first electrode 401A of the light emitting device 401.
In some alternative embodiments, please continue to refer to fig. 1, fig. 6 and fig. 7, in this embodiment, the distance L between two adjacent reflection portions 70 is greater than or equal to 0.5 μm.
This embodiment further explains that when the first electrode 401A of the light emitting device 401 is reused as the reflective portion 70, the distance L between any two adjacent reflective portions 70 is greater than or equal to 0.5 μm, so as to ensure that the reflective area of the reflective portion 70 is as large as possible, further improve the reflection probability of light at the reflective portion 70, further improve the light extraction efficiency of the display panel, and simultaneously enable a gap to be formed between the reflective portion 70 used as the first electrode 401A and the reflective portion 70 whose orthographic projection is located between the orthographic projections of the two adjacent openings 501 toward the light extraction surface E of the display panel 000, thereby avoiding the influence on the display quality of the display panel caused by the short circuit due to the connection of the reflective portion 70 used as the first electrode 401A and other metal conductive structures.
In some alternative embodiments, please refer to fig. 1 and 8 in combination, fig. 8 is another schematic cross-sectional structure view along the direction a-a' in fig. 1, in which in the present embodiment, the planarization layer 30 includes a plurality of grooves 301, and in the direction Z perpendicular to the light-emitting surface E of the display panel 000, the grooves 301 at least partially penetrate through the planarization layer 30;
the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 is located between the orthographic projections of the two adjacent openings 501 to the light-emitting surface E of the display panel 000, and the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 and the orthographic projection of the partial reflection part 70 to the light-emitting surface E of the display panel 000 are overlapped.
The present embodiment further explains that a plurality of grooves 301 may be disposed on a surface of the planarization layer 30 on a side away from the substrate 10, and in a direction Z perpendicular to the light emitting surface E of the display panel 000, the grooves 301 at least penetrate through a portion of the planarization layer 30, that is, the grooves 301 may penetrate through a portion of the planarization layer 30, optionally, the plurality of grooves 301 of the planarization layer 30 may be manufactured by a Halftone (Halftone mask) process, and the grooves 301 may also penetrate through all of the planarization layer 30. The orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 is positioned between the orthographic projections of the two adjacent openings 501 to the light-emitting surface E of the display panel 000, and the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 and the orthographic projection of the partial reflection part 70 to the light-emitting surface E of the display panel 000 are mutually overlapped, namely, the partial reflection part 70 of the display panel 000 is laid in the groove 301, the concave structure of the reflection part 70 is matched with the concave shape of the groove 301, so that the reflection function of the reflection part 70 is realized, meanwhile, the direction of the reflected light can be changed through the reflection part 70 in the concave shape, the light reflected by the reflection part 70 is converged, and the light-emitting efficiency.
In some alternative embodiments, please refer to fig. 1 and 9 in combination, fig. 9 is another schematic cross-sectional structure view along the direction a-a' in fig. 1, in which in the present embodiment, the planarization layer 30 includes a plurality of grooves 301, and in the direction Z perpendicular to the light emitting surface E of the display panel 000, the grooves 301 at least partially penetrate through the planarization layer 30; the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 is located between the orthographic projections of the two adjacent openings 501 to the light-emitting surface E of the display panel 000, and the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 and the orthographic projection of the partial reflection part 70 to the light-emitting surface E of the display panel 000 are overlapped. The groove 301 includes a first section 301A and a second section 301B (it is understood that fig. 9 is a cross-sectional view, and the first section 301A and the second section 301B are illustrated by dotted lines in fig. 9), the first section 301A and the second section 301B are both parallel to the light-emitting surface E of the display panel 000, the first section 301A is located on a side of the second section 301B away from the substrate 10 in a direction Z perpendicular to the light-emitting surface E of the display panel 000, and an area of the first section 301A is larger than an area of the second section 301B.
The present embodiment further explains that a plurality of grooves 301 may be disposed on a surface of the planarization layer 30 on a side away from the substrate 10, and in a direction Z perpendicular to the light emitting surface E of the display panel 000, the grooves 301 at least penetrate through a portion of the planarization layer 30, that is, the grooves 301 may penetrate through a portion of the planarization layer 30, optionally, the plurality of grooves 301 of the planarization layer 30 may be manufactured by a Halftone (Halftone mask) process, and the grooves 301 may also penetrate through all of the planarization layer 30. The orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 is positioned between the orthographic projections of the two adjacent openings 501 to the light-emitting surface E of the display panel 000, and the orthographic projection of the groove 301 to the light-emitting surface E of the display panel 000 and the orthographic projection of the partial reflection part 70 to the light-emitting surface E of the display panel 000 are overlapped, namely, the partial reflection part 70 of the display panel 000 is laid in the groove 301, the concave structure of the reflection part 70 is matched with the concave shape of the groove 301, the groove 301 comprises a first section 301A and a second section 301B, the first section 301A and the second section 301B are both parallel to the light-emitting surface E of the display panel 000, in the direction Z perpendicular to the light-emitting surface E of the display panel 000, the first section 301A is positioned on the side of the second section 301B far away from the substrate 10, the area of the first section 301A is larger than that of the second section 301B, namely, the side wall of the groove 301, the slope-shaped reflection part 70 can further converge light, so that the light-emitting efficiency of the panel is further improved while the reflection function of the reflection part 70 is realized.
In some alternative embodiments, with continuing reference to fig. 1-9 and fig. 10, fig. 10 is a schematic cross-sectional view taken along a direction a-a' of fig. 1, in which the display panel 000 further includes at least one power signal line 90, and the power signal line 90 is electrically connected to the light emitting device 401; the reflection part 70 is electrically connected in parallel to the power signal line 90, and it is understood that the reflection part 70 electrically connected in parallel to the power signal line 90 of the present embodiment is a reflection part whose orthographic projection is located between orthographic projections of two adjacent openings 501 to the light emitting surface E of the display panel 000, rather than being multiplexed as a reflection part of the first electrode 401A of the light emitting device 401.
This embodiment further explains that the display panel 000 may further include a pixel driving circuit for providing a pixel driving signal to each light emitting device 401 of the display panel to make the light emitting device 401 emit light, wherein the pixel driving circuit needs to be connected with a power supply signal to provide power for the pixel driving circuit, the power supply signal that the pixel driving circuit needs to be connected to can be provided through a power supply signal line 90 disposed in the display panel 000, the optional power supply signal line 90 can be located in a certain metal film layer (as shown in fig. 10) in the array layer 20, the power supply signal line 90 is electrically connected with the light emitting device 401 to provide the power supply signal for driving each light emitting device 401, and the optional power supply signal line can be a PVDD power supply signal line and/or a PVEE power supply signal line. The reflection portion 70 of the present embodiment is electrically connected in parallel with the power signal line 90, and optionally, the reflection portion 70 may be electrically connected in parallel with the power signal line 90 through a via hole, which is beneficial to reducing the impedance of the power signal line 90, improving the driving capability of the pixel driving circuit of the display panel, and improving the display effect.
It should be noted that fig. 10 of this embodiment only schematically illustrates a structure that the power signal line 90 may be located in a certain metal film layer in the array layer 20, and in a specific implementation, the film layer where the power signal line 90 is located may also be another film layer, and this embodiment is not limited in particular. Fig. 10 of this embodiment only schematically illustrates the structure of the array layer 20, and in practical implementation, the array layer 20 may further include other structures such as transistors, which can be understood with reference to the structure of the array layer in the display panel in the related art, and details of this embodiment are not described herein.
In some alternative embodiments, please refer to fig. 11, where fig. 11 is a schematic plane structure diagram of a display device according to an embodiment of the present invention, and the display device 111 according to this embodiment includes the display panel 000 according to the above embodiment of the present invention. The embodiment of fig. 11 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 000 in the above embodiments, which is not described herein again.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
the side of the planarization layer, which is far away from the substrate, is also provided with a plurality of reflection parts, and the orthographic projection of at least part of the reflection parts to the light-emitting surface of the display panel is positioned between the orthographic projections of two adjacent openings to the light-emitting surface of the display panel, namely, when the display panel is manufactured, after the planarization layer is paved, the film layer where the reflection parts are positioned can be paved, and the film layer where the reflection parts are positioned is patterned to obtain a plurality of reflection parts, wherein the orthographic projection of at least part of the reflection parts to the light-emitting surface of the display panel is positioned between the orthographic projections of two adjacent openings to the light-emitting surface of the display panel, namely, the display panel can be provided with the reflection parts only at the positions where certain light rays are. The plurality of reflecting parts can reuse light which is possibly lost in the organic material film and the glass substrate as much as possible, and reflect the light to the light-emitting surface of the display panel for emitting, so that the light-emitting efficiency of the panel is improved, and the power consumption of the panel is reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. A display panel, comprising:
a substrate;
the array layer is positioned on one side of the substrate;
the planarization layer is positioned on one side of the array layer, which is far away from the substrate;
the light-emitting device layer is positioned on one side, far away from the substrate, of the planarization layer; the light-emitting device layer comprises a pixel defining layer and a plurality of light-emitting devices arranged in an array, and the light-emitting devices comprise a first electrode, a light-emitting part and a second electrode which are positioned on one side of the planarization layer away from the substrate; the pixel defining layer includes a plurality of openings exposing the first electrodes;
the packaging layer is positioned on one side, far away from the substrate, of the light-emitting device layer;
the film layer where the reflecting parts are located is located on one side, far away from the substrate, of the planarization layer, and at least part of orthographic projections of the reflecting parts to the light-emitting surface of the display panel are located between orthographic projections of two adjacent openings to the light-emitting surface of the display panel.
2. The display panel of claim 1, further comprising an optical structure layer on a side of the encapsulation layer away from the substrate;
the optical structure layer comprises a plurality of micro lens units, and the orthographic projection of the micro lens units to the light-emitting surface of the display panel is at least partially overlapped with the orthographic projection of the opening to the light-emitting surface of the display panel; the micro lens unit is used for converging the light rays entering the micro lens unit to one side far away from the substrate.
3. The display panel of claim 2, wherein the optical structure layer comprises a first optical structure layer and a second optical structure layer, the second optical structure layer covers the first optical structure layer in a direction perpendicular to the light emitting surface of the display panel, and the micro lens unit is located on the first optical structure layer; wherein the refractive index of the first optical structure layer is smaller than that of the second optical structure layer.
4. The display panel of claim 2, wherein the microlens unit comprises a first surface and a second surface opposite to each other in a direction perpendicular to the light emitting surface of the display panel, the first surface is a surface of the microlens unit close to the substrate, and the second surface is a surface of the microlens unit far from the substrate;
the first surface and the packaging layer are arranged in a laminating mode, and the second surface comprises a plurality of recesses towards one side close to the substrate to form a concave lens structure.
5. The display panel of claim 2, wherein the optical structure layer is made of an organic material.
6. The display panel of claim 1, wherein the reflective portion and the first electrode are made of the same material in the same layer.
7. The display panel of claim 1, wherein at least a portion of the front projection of the reflection portion onto the light exit surface of the display panel overlaps with the front projection of the light emitting device onto the light exit surface of the display panel;
the first electrode is multiplexed as the reflection portion.
8. The display panel according to claim 7, wherein a pitch between adjacent two of the reflective portions is greater than or equal to 0.5 μm.
9. The display panel of claim 1, wherein the planarization layer comprises a plurality of grooves, the grooves extending through at least a portion of the planarization layer in a direction perpendicular to the light exit surface of the display panel;
the orthographic projection of the groove to the light-emitting surface of the display panel is positioned between the orthographic projections of the two adjacent openings to the light-emitting surface of the display panel, and the orthographic projection of the groove to the light-emitting surface of the display panel and the orthographic projection of part of the reflecting part to the light-emitting surface of the display panel are mutually overlapped.
10. The display panel according to claim 9, wherein the groove comprises a first cross section and a second cross section, the first cross section and the second cross section are both parallel to the light emitting surface of the display panel, and the first cross section is located on a side of the second cross section away from the substrate in a direction perpendicular to the light emitting surface of the display panel;
the area of the first cross section is larger than the area of the second cross section.
11. The display panel according to claim 1, wherein the reflective portion is a single metal film layer.
12. The display panel according to claim 1, further comprising at least one power supply signal line electrically connected to the light emitting device;
the reflection portion is electrically connected in parallel with the power signal line.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
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