CN108110038B - Organic light emitting display panel and display device - Google Patents
Organic light emitting display panel and display device Download PDFInfo
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- CN108110038B CN108110038B CN201810001785.2A CN201810001785A CN108110038B CN 108110038 B CN108110038 B CN 108110038B CN 201810001785 A CN201810001785 A CN 201810001785A CN 108110038 B CN108110038 B CN 108110038B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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Abstract
The invention discloses an organic light-emitting display panel and a display device, belonging to the technical field of display and comprising: a substrate base plate; the pixel definition layer is positioned on the substrate base plate and comprises a plurality of opening areas; a plurality of organic light emitting diodes at least partially positioned in the opening region of the pixel defining layer, and including a cathode, an anode, and an organic light emitting part positioned between the cathode and the anode; and a reflective film is arranged on the side wall of the opening region of the pixel definition layer. Compared with the prior art, the organic light-emitting display panel has the advantages that the light loss can be reduced, the color crosstalk phenomenon is improved, and the improvement of the resolution of the organic light-emitting display panel is facilitated.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and a display device.
Background
Organic light emitting display panels have the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, and fast response speed, and are increasingly favored by consumers.
Referring to fig. 1, an organic light emitting display panel provided in the prior art includes a substrate 03, a thin film transistor 01 disposed on the substrate, and an organic light emitting diode 02. The thin film transistor 01 includes a gate electrode 011, a semiconductor portion 012, a source electrode 013, and a drain electrode 014, and the organic light emitting diode 02 includes an anode 021, a cathode 022, and an organic light emitting material portion 023 interposed between the anode 021 and the cathode 022. The anode 021 includes a reflective layer which can reflect light, the cathode 022 is a transparent electrode, and light emitted from the light-emitting material portion 023 exits from the cathode 022 side. This type of organic light emitting display panel is a top emission structure.
The organic light emitting display panel further includes a pixel defining layer 04 including an opening region at which the organic light emitting diode 02 is at least partially disposed. A part of the light emitted from the luminescent material portion 02 is irradiated onto the sidewall of the opening region, resulting in loss of the light.
In addition, the light beams of two adjacent organic light emitting diodes 02 may be converged to generate a color crosstalk phenomenon. When the organic light emitting display panel is a bendable flexible panel, the color crosstalk phenomenon is more serious in a state where the panel is bent. In order to reduce the cross color phenomenon, in the prior art, the distance W between two adjacent opening regions is set to be larger, which reduces the resolution of the organic light emitting display panel and is not beneficial to improving the resolution of the organic light emitting display panel.
Disclosure of Invention
In view of the foregoing, the present invention provides an organic light emitting display panel and a display device.
The present invention provides an organic light emitting display panel, including: a substrate base plate; the pixel definition layer is positioned on the substrate base plate and comprises a plurality of opening areas; a plurality of organic light emitting diodes at least partially positioned in the opening region of the pixel defining layer, and including a cathode, an anode, and an organic light emitting part positioned between the cathode and the anode; and a reflective film is arranged on the side wall of the opening region of the pixel definition layer.
The invention also provides a display device comprising the organic light-emitting display panel.
Compared with the prior art, the organic light-emitting display panel and the display device provided by the invention at least realize the following beneficial effects:
in the organic light-emitting display panel provided by the invention, the side wall of the opening region of the pixel defining layer is provided with the reflective film, and light emitted by the organic light-emitting part irradiates the reflective film to generate a reflection effect, so that the loss of the light is reduced. Moreover, the light intersection of two adjacent organic light emitting diodes can be reduced, and the color crosstalk phenomenon is improved. Compared with the prior art, the distance between two adjacent opening regions can be reduced, and the resolution of the organic light-emitting display panel can be improved.
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 partial cross-sectional view illustrating an organic light emitting display panel provided in the prior art;
fig. 2 is a schematic partial cross-sectional view of an organic light emitting display panel according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a partial cross-sectional structure of another organic light emitting display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a partial cross-sectional structure of another organic light emitting display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a partial cross-sectional structure of another organic light emitting display panel according to an embodiment of the present invention;
fig. 6 is a schematic plan view illustrating a structure of another organic light emitting display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a touch electrode in the organic light emitting display panel provided in fig. 6;
fig. 8 is a schematic structural diagram 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. 2, fig. 2 is a schematic partial cross-sectional view of an organic light emitting display panel according to an embodiment of the invention. The embodiment provides an organic light emitting display panel including: a substrate base plate 00; a pixel defining layer 10, wherein the pixel defining layer 10 is located on the substrate base plate 00, and the pixel defining layer 10 includes a plurality of opening regions 11; a plurality of organic light emitting diodes 20, the organic light emitting diodes 20 being at least partially located in the opening regions 11 of the pixel defining layer 10, and the organic light emitting diodes 20 including a cathode 21, an anode 22, and an organic light emitting part 23 located between the cathode 21 and the anode 22; wherein, a reflective film 30 is disposed on the sidewall of the opening region 11 of the pixel defining layer 10.
The display panel provided in this embodiment is an organic light emitting display panel, and optionally, the organic light emitting display panel may include a plurality of thin film transistors 50, where the thin film transistors 50 are used to drive the organic light emitting diodes 20. Specifically, the thin film transistor 50 includes a gate electrode 51, a semiconductor portion 52, a source electrode 53, and a drain electrode 54, wherein the drain electrode 54 is electrically connected to the anode 22 of the organic light emitting diode 20.
In this embodiment, the substrate base 00 may be a hard base, for example, made of a glass material, or may be a flexible base, for example, made of a resin material, which is not particularly limited in this embodiment.
The pixel defining layer 10 is typically made of an organic material. Alternatively, in the process of manufacturing the organic light emitting display panel, the pixel defining layer 10 is manufactured after the anode 22 is manufactured. The pixel defining layer 10 includes a hollow portion, the hollow portion penetrates through the pixel defining layer 10 and exposes at least a portion of the anode 22, an area where the hollow portion is located is the opening area 11, and the organic light emitting portion 23 of the organic light emitting diode 20 is disposed in the opening area 11.
Alternatively, the anode 22 of the organic light emitting diode 20 is partially located in the opening region 11. Alternatively, the cathode 21 of the organic light emitting diode 20 is partially located in the opening region 11; alternatively, the cathodes 21 of the plurality of organic light emitting diodes 20 are connected together.
In the organic light emitting display panel provided in this embodiment, the reflective film 30 is disposed on the sidewall of the opening region 11, and the reflective film 30 has the function of reflecting light, so that the light irradiated to the reflective film 30 is reflected.
When the organic light emitting display panel performs a display function, appropriate voltages are applied to the anode 22 and the cathode 21 of the organic light emitting diode 20, and holes of the anode 22 and electrons of the cathode 21 are combined in the organic light emitting portion 23, so that the organic light emitting portion 23 emits light. Of the light emitted from the organic light emitting section 23, part of the light irradiated to the reflective film 30 is reflected, and the reflected light exits from the cathode 21 side, thereby reducing the loss of light. Moreover, the light intersection of two adjacent organic light emitting diodes 20 can be reduced, and the color crosstalk phenomenon can be improved. In addition, the distance between two adjacent organic light emitting diodes 20 can be set to be shorter, and compared with the prior art, the distance W between two adjacent opening regions 11 can be reduced, which is beneficial to improving the resolution of the organic light emitting display panel.
It should be noted that, in order to clearly illustrate the technical solution of the present embodiment, fig. 2 only illustrates a partial cross-sectional schematic view of the organic light emitting display panel. It is understood that the present embodiment provides an organic light emitting display panel in which the number of the opening regions 11 of the pixel defining layer 10 and the number of the organic light emitting diodes 20 are both multiple, and the present embodiment does not limit the specific number.
In fig. 2, the reflective film 30 is in direct contact with the pixel defining layer 10, and the reflective film 30 is disposed on the surface of the pixel defining layer 10. In the organic light emitting display panel provided in the embodiment of the present invention, there are various specific arrangement manners of the reflective film, and the specific arrangement manner of the reflective film 30 is exemplarily described herein below.
In some optional implementation manners, please refer to fig. 3, and fig. 3 is a schematic partial cross-sectional structure diagram of another organic light emitting display panel according to an embodiment of the present invention. The reference numerals of fig. 2 are used along with fig. 3, and the description of the same parts is omitted. In the organic light emitting display panel shown in fig. 3, a first insulating layer 41 is disposed on a sidewall of the opening region 11 of the pixel defining layer 10, and the reflective film 30 is disposed on a side of the first insulating layer 41 away from the pixel defining layer 10. The first insulating layer 41 is made of an insulating material, and optionally, the material of the first insulating layer 41 includes an organic material.
Optionally, in a process of manufacturing the organic light emitting display panel provided in this embodiment, after the pixel defining layer 10 is manufactured, the first insulating layer material layer and the reflective film material layer are sequentially manufactured; then the reflective film material layer is patterned to form the reflective film 30, and then the first insulating layer material layer is patterned to remove a portion of the first insulating layer 41 covering the surface of the anode 22 to form the first insulating layer 41. The first insulating layer material layer can protect the anode 22 during patterning of the reflective film material layer, so that the anode 22 is not etched or damaged.
In some optional implementation manners, please refer to fig. 4, where fig. 4 is a schematic partial cross-sectional structure diagram of another organic light emitting display panel provided in an embodiment of the present invention. Fig. 4 follows the reference numerals of fig. 2, and the description of the same parts is omitted. In the organic light emitting display panel shown in fig. 4, the cathode 21 covers the opening region 11 of the pixel defining layer 10, and the light reflecting film 30 is located on the side of the cathode 21 away from the pixel defining layer 10. In this embodiment, the reflective film 30 is disposed on a side of the cathode 21 away from the pixel defining layer 10, optionally, the reflective film 30 is disposed on the surface of the cathode 21, the reflective film 30 is electrically connected to the cathode 21, which has an effect of reducing the resistance of the cathode 21, and when the area of the cathode 21 is larger, the reduction of the resistance of the cathode 21 can improve the uniformity of the potential of the cathode 21.
Optionally, on the basis of the display panel provided in any embodiment of the present invention, the reflective film 30 is electrically insulated from the anode 22, so as to prevent the anode 22 from being electrically connected to the cathode 21 through the reflective film 30.
It should be noted that fig. 2, fig. 3 and fig. 4 only illustrate a specific arrangement of the reflective film 30, in other alternative embodiments, the reflective film 30 may have other arrangements, and the embodiments provided in fig. 2, fig. 3 and fig. 4 should not be construed as limiting the present invention.
In some optional implementation manners, please refer to fig. 5, and fig. 5 is a schematic partial cross-sectional structure diagram of another organic light emitting display panel according to an embodiment of the present invention. Fig. 5 is explained only on the basis of the organic light emitting display panel provided in fig. 4. In the organic light emitting display panel shown in fig. 5, the reflective films 30 on the sidewalls of the opening regions 11 of two adjacent pixel defining layers 10 are connected to each other, so that the difficulty of the process for manufacturing the reflective films 30 can be reduced. Alternatively, the reflective films 30 on the sidewalls of the opening regions 11 of the plurality of pixel defining layers 10 are connected to each other.
Optionally, with continued reference to fig. 5, the thickness d of the reflective film 30 is greater than or equal to
The thickness of the reflective film 30 is not too small, and local fracture and the like are easy to occur due to unstable process when the thickness is too small; the thickness of the reflective film 30 should not be too large, and too large will occupy more space of the opening region 11, which will affect the display effect of the organic light emitting display panel.
In some optional implementations, on the basis of the display panel provided in any embodiment of the present invention, the reflectivity of the reflective film 30 to visible light is greater than or equal to 90%, which can further reduce the loss of light, improve the color crosstalk, and reduce the distance W between two adjacent opening regions 11, thereby improving the resolution of the organic light emitting display panel.
In some alternative implementations, the material of the reflective film 30 includes a metal material based on the display panel provided in any embodiment of the present invention. The metal material is glossy and ductile, and optionally, a part of the metal material reflects strongly visible light, such as aluminum or silver, and the material of the reflective film 30 may be aluminum or silver with high reflectivity for visible light.
In some optional implementation manners, the organic light emitting display panel provided in any embodiment of the present invention further has a touch function. Referring to fig. 5, fig. 6 and fig. 7, the organic light emitting display panel includes a touch electrode 60, and the reflective film 30 is reused as the touch electrode 60; the organic light emitting display panel further includes a driving chip 70, each touch electrode 60 is electrically connected to the driving chip 70, and optionally, the touch electrode 60 is electrically connected to the driving chip 70 through a touch electrode line 61; the driving chip 70 provides the touch driving signal to the touch electrode 60 or receives the touch detection signal collected by the touch electrode 60.
Alternatively, the reflective films 30 on the sidewalls of the opening regions 11 of the plurality of pixel definition layers 10 are connected to form one touch electrode 60, and in fig. 6, only one touch electrode 60 covers the opening regions 11 of twelve pixel definition layers 10. It is understood that one touch electrode 60 may cover any number of the opening regions 11 of the pixel definition layer 10, and the embodiment is not particularly limited thereto.
The driving chip 70 may transmit an electrical signal to the touch electrode 60, specifically, the driving chip 70 may provide a touch driving signal to the touch electrode 60, or may also receive a touch detection signal collected by the touch electrode 60; alternatively, the driving chip 70 may provide the touch driving signal to the touch electrode 60, or receive the touch detection signal collected by the touch electrode 60.
In fig. 6 and 7, only the shape of the touch electrode is taken as a rectangle for illustration, and the specific shape of the touch electrode is not limited in this embodiment.
The invention also provides a display device comprising the organic light-emitting display panel provided by any one of the above embodiments of the invention. Referring to fig. 8, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 8 provides a display device 100 including an organic light emitting display panel 101 according to any of the above embodiments of the present invention. The embodiment of fig. 8 only takes a mobile phone as an example to describe the display device 100, and it should be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the organic light emitting display panel provided in the embodiment of the present invention, and specific descriptions on the organic light emitting display panel in the above embodiments may be specifically referred to, and this embodiment is not described herein again.
As can be seen from the foregoing embodiments, the organic light emitting display panel and the display device provided by the present invention at least achieve the following beneficial effects:
in the organic light-emitting display panel provided by the invention, the side wall of the opening region of the pixel defining layer is provided with the reflective film, and light emitted by the organic light-emitting part irradiates the reflective film to generate a reflection effect, so that the loss of the light is reduced. Moreover, the light intersection of two adjacent organic light emitting diodes can be reduced, and the color crosstalk phenomenon is improved. Compared with the prior art, the distance between two adjacent opening regions can be reduced, and the resolution of the organic light-emitting display panel can be improved
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 (11)
1. An organic light emitting display panel, comprising:
a substrate base plate;
a pixel defining layer on the substrate base plate, the pixel defining layer including a plurality of opening regions;
a plurality of organic light emitting diodes at least partially positioned in the opening region of the pixel defining layer, and including a cathode electrode, an anode electrode, and an organic light emitting part positioned between the cathode electrode and the anode electrode; wherein the content of the first and second substances,
a reflective film is arranged on the side wall of the opening region of the pixel defining layer;
the organic light-emitting display panel comprises a touch electrode, and the reflective film is reused as the touch electrode;
the organic light-emitting display panel further comprises a driving chip, each touch electrode is electrically connected to the driving chip, and the driving chip provides a touch driving signal for the touch electrode or receives a touch detection signal collected by the touch electrode.
2. The organic light-emitting display panel according to claim 1,
the light reflecting film is in direct contact with the pixel defining layer.
3. The organic light-emitting display panel according to claim 1,
the side wall of the opening region of the pixel definition layer is provided with a first insulating layer, and the reflective film is positioned on one side, far away from the pixel definition layer, of the first insulating layer.
4. The organic light-emitting display panel according to claim 1,
the cathode covers the opening region of the pixel defining layer, and the light reflecting film is positioned on one side of the cathode, which is far away from the pixel defining layer.
5. The organic light-emitting display panel according to any one of claims 1 to 4, wherein the light-reflecting film is electrically insulated from the anode.
6. The organic light-emitting display panel according to claim 1,
the reflectivity of the light reflecting film to visible light is greater than or equal to 90%.
7. The organic light-emitting display panel according to claim 1,
the reflective films on the sidewalls of the opening regions of two adjacent pixel defining layers are connected to each other.
8. The organic light-emitting display panel according to claim 1,
the material of the light reflecting film comprises a metal material.
9. The organic light-emitting display panel according to claim 8,
the material of the reflective film comprises aluminum or silver.
10. The organic light-emitting display panel according to claim 1,
the thickness of the reflective film is more than or equal to
11. A display device characterized by comprising the organic light emitting display panel according to any one of claims 1 to 10.
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| TWI699903B (en) * | 2019-05-17 | 2020-07-21 | 友達光電股份有限公司 | Display panel and fabrication method thereof |
| CN110190097A (en) * | 2019-05-27 | 2019-08-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113113550B (en) * | 2021-03-16 | 2023-01-10 | 武汉华星光电半导体显示技术有限公司 | OLED display panel and OLED display device |
| CN113764489B (en) * | 2021-09-02 | 2022-09-27 | 深圳市华星光电半导体显示技术有限公司 | Array substrate, manufacturing method of array substrate and display device |
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