CN113838995B - Display panel and display device - Google Patents
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- CN113838995B CN113838995B CN202111108439.2A CN202111108439A CN113838995B CN 113838995 B CN113838995 B CN 113838995B CN 202111108439 A CN202111108439 A CN 202111108439A CN 113838995 B CN113838995 B CN 113838995B
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Classifications
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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
-
- 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
-
- 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
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a display panel and display device relates to the technical field of display, and is used for solving the problem that the display performance of the existing display panel is low in a large visual angle. The display panel comprises a substrate, a plurality of total reflection structures arranged on the substrate, a plurality of first pixel units and a plurality of second pixel units arranged on the substrate, wherein the plurality of first pixel units are positioned in the total reflection structures, and the plurality of second pixel units are positioned outside the total reflection structures; at least one first pixel unit is arranged in each total reflection structure, each total reflection structure comprises a total reflection surface at least partially surrounding the first pixel unit in the total reflection structure, and the total reflection structure is configured to totally reflect at least part of light rays emitted by the first pixel unit and incident on the total reflection surface out of the display panel along the forward direction of the display panel. The display performance of the display panel with a large viewing angle is ensured while the forward light output of the display panel is ensured.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
Organic light emitting diode (Organic Light Emitting Diode, abbreviated as OLED) display panels are widely used in display devices such as mobile phones and tablet computers due to their characteristics of self-luminescence, rapid response, wide viewing angle, and capability of being fabricated on flexible substrates. Light extraction efficiency is one of the important indicators for judging the performance of an OLED display panel, however, in order to increase the forward light output of the OLED display panel, it is generally necessary to sacrifice the light intensity in the large viewing angle direction of the OLED display panel and reduce the large viewing angle display performance of the OLED display panel.
Disclosure of Invention
In view of the foregoing, embodiments of the present application provide a display panel and a display device, in which a first pixel unit in the display panel is located in a total reflection structure, and a second pixel unit is located outside the total reflection structure, so that not only can the forward light output of the display panel be ensured, but also the large viewing angle display performance of the display panel can be improved.
In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:
a first aspect of embodiments of the present application provides a display panel, including a substrate, a plurality of total reflection structures disposed on the substrate, a plurality of first pixel units and a plurality of second pixel units disposed on the substrate, where the plurality of first pixel units are located in the total reflection structures, and the plurality of second pixel units are located outside the total reflection structures; at least one first pixel unit is arranged in each total reflection structure, each total reflection structure comprises a total reflection surface at least partially surrounding the first pixel unit in the total reflection structure, and the total reflection structure is configured to totally reflect at least part of light rays emitted by the first pixel unit and incident on the total reflection surface out of the display panel along the forward direction of the display panel.
According to the display panel provided by the embodiment of the application, the display panel is provided with a plurality of total reflection structures, and the pixel units of the display panel comprise a first pixel unit positioned in the total reflection structure and a second reflection unit positioned outside the total reflection structure. Therefore, the light rays with larger relative forward light-emitting inclination angles emitted by the first pixel units can be totally reflected by the total reflection surface in the total reflection structure, so that the light-emitting angles of the light rays with larger relative forward light-emitting inclination angles emitted by the first pixel units are changed to forward light-emitting light rays, and the forward light-emitting quantity of the display panel is ensured; the second pixel unit is positioned outside the total reflection structure, so that the light emitting angle is not influenced by the total reflection structure, and light rays emitted by the second pixel unit can be dispersed in all directions, and the large-visual-angle display performance of the display panel is ensured.
In one possible implementation, the display panel includes a planarization layer disposed on the substrate and a pixel defining layer covering the planarization layer, the pixel defining layer having a refractive index greater than a refractive index of the planarization layer; the planarization layer is provided with a plurality of first grooves, the pixel limiting layer forms a second groove in each first groove, the bottom wall of the second groove is provided with a first pixel opening, and the first pixel unit is located in the first pixel opening.
In a possible implementation manner, the side wall of the first groove and/or the side wall of the second groove form the total reflection structure, and the bonding surface between the side wall of the first groove and/or the side wall of the second groove forms the total reflection surface
In a possible implementation manner, one first pixel opening is disposed on the bottom wall of each second groove.
In one possible implementation manner, three first pixel openings are arranged on the bottom wall of each second groove, one first pixel unit is respectively arranged in each of the three first pixel openings, and the light emitting colors of the first pixel units in the three first pixel openings are all different.
In a possible implementation, a second pixel opening is provided in a region of the pixel defining layer located outside the second recess, and the second pixel unit is located in the second pixel opening.
In one possible implementation, the display panel further includes a buffer layer disposed between the substrate and the planarization layer, the planarization layer and the pixel defining layer are disposed on the buffer layer, a plurality of third grooves are disposed on the buffer layer, and the planarization layer forms one of the first grooves in each of the third grooves.
In one possible implementation, the third recess has a depth of 0.6-1.5 microns.
In one possible implementation, the planarizing layer has a thickness of 1-1.5 microns.
In one possible implementation, the display panel further includes an encapsulation layer covering the pixel defining layer, the encapsulation layer having a refractive index greater than a refractive index of the pixel defining layer.
In one possible implementation manner, the display panel further includes a planarization layer disposed on the substrate, a plurality of protrusions disposed on the planarization layer, and a pixel defining layer covering each of the protrusions and the planarization layer, the pixel defining layer having a refractive index greater than that of the protrusions, the pixel defining layer forming an upper protrusion at each of the protrusions, the upper protrusion and the protrusions forming the total reflection structure, and a junction surface of the upper protrusion and the protrusions forming the total reflection surface.
A second aspect of the embodiments of the present application provides a display device, including a first driving chip, a second driving chip, and a display panel as described above, where the first driving chip is in signal connection with each of the first pixel units, and the second driving chip is in signal connection with each of the second pixel units.
Since the display device includes the display panel of the first aspect described above, the display device also has the same advantages as the display panel, and reference is made to the above description in particular.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a display panel in the related art;
FIG. 2 is a schematic view of a partial enlarged structure at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 4 is a diagram showing a positional relationship between a total reflection surface and a first pixel unit in a display panel according to an embodiment of the present application;
fig. 5 is a diagram showing a positional relationship between a total reflection surface and a first pixel unit in a display panel according to another embodiment of the present application;
fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present application;
fig. 7 is a schematic structural diagram of a display panel according to still another embodiment of the present application.
Reference numerals illustrate:
10-an array substrate; 11-a substrate;
12-a driving circuit layer; 121-a buffer layer;
1211-a third groove; 122-an active layer;
123-a gate insulating layer; 124-a first metal layer;
125-a capacitive insulating layer; 126-a second metal layer;
127-an interlayer insulating layer; 128-a third metal layer;
13-a planarization layer; 131-a first groove;
a 20-pixel defining layer; 21-a first pixel opening;
22-second pixel openings; 23-a second groove;
24-upper convex part; a 30-pixel unit;
31-a first pixel unit; 32-a second pixel unit;
40-packaging layer; 50-a touch layer;
60-micro lenses; 70-a high refractive index layer;
80-bump.
Detailed Description
As described in the background art, in order to increase the forward light output of the display panel, a total reflection structure is generally disposed in the display panel, and the light rays with larger inclination angles emitted by the pixel units of the display panel are emitted after being totally emitted by the total reflection structure, so as to increase the forward light output of the display panel.
Taking the display panel shown in fig. 1 as an example, the display panel includes an array substrate 10 and a pixel defining layer 20 disposed on the array substrate 10, wherein a pixel opening is disposed on the pixel defining layer 20, and a pixel unit 30 is disposed in the pixel opening. The display panel further includes an encapsulation layer 40 disposed on the pixel defining layer 20, a touch layer 50 disposed on the encapsulation layer 40, a plurality of microlenses 60 arranged in an array on the touch layer 50, and a high refractive index layer 70 covering the touch layer 50 and the microlenses. The refractive index of the high refractive index layer 70 is higher than that of the microlens 60, and the high refractive index layer 70 and the microlens 60 constitute the total reflection structure described above.
Total reflection refers to the phenomenon that light is totally reflected back into the original medium when the incident angle is larger than the critical angle, while light is emitted from an optically dense medium (the refractive index of light in this medium is large) to the interface of an optically sparse medium (the refractive index of light in this cutoff is small). As shown in fig. 2, the positions of the areas between each pixel unit 30 and the microlens 60 correspond, and when the light rays emitted from the pixel units 30 and having a large angle of inclination with respect to the forward light rays are incident on the junction surface of the microlens 60 and the high refractive index layer 70, the light rays having an angle of incidence larger than the critical angle are totally reflected on the junction surface, so that the light rays become forward light rays.
In the above display panel, since the light rays emitted from the pixel units 30 and having a relatively large angle of inclination with respect to the forward light emission are totally reflected in the total reflection structure, the light rays are changed into the forward light emission light rays, and the light intensity in the large viewing angle direction of the display panel is sacrificed while the forward light emission amount of the display panel is improved, thereby reducing the large viewing angle display performance of the display panel.
It is understood that the "large viewing angle" in the present application refers to a viewing angle having a relatively large angle with respect to a viewing angle perpendicular to the light-emitting surface of the display panel, for example, a viewing angle having an angle greater than 45 ° with respect to a viewing angle perpendicular to the light-emitting surface.
To the technical problem, the embodiment of the application provides a display panel, and the pixel units of the display panel comprise a first pixel unit located in a total reflection structure and a second pixel unit located outside the total reflection structure, so that the forward light output of the display panel can be ensured, and the large-viewing-angle display performance of the display panel can be improved.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the following description will make the technical solutions of the embodiments of the present application clear and complete with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are within the scope of the protection of the present application, will be within the purview of one of ordinary skill in the art without the exercise of inventive faculty.
As shown in fig. 3, the embodiment of the present application provides a display panel, which may be an OLED display panel, including a substrate 11, a plurality of total reflection structures disposed on the substrate 11, a plurality of first pixel units 31 disposed on the substrate 11 and located within each total reflection structure, and a plurality of second pixel units 32 located outside each total reflection structure. At least one first pixel cell 31 is disposed within each total reflection structure. Each of the total reflection structures includes a total reflection surface F at least partially surrounding the first pixel unit 31 inside thereof. Part of the light emitted from the first pixel unit 31 in the total reflection structure can be totally reflected by the total reflection surface F and is emitted out of the display panel along the forward direction of the display panel.
It is to be understood that, the first pixel unit 31 refers to a sub-pixel capable of emitting a single color, and a plurality of first pixel units 31 with different emission colors may form a pixel, for example, a first pixel unit 31 with red emission color, a first pixel unit 31 with blue emission color, and a first pixel unit 31 with green emission color form a pixel.
Similarly, the second pixel unit 32 refers to a sub-pixel capable of emitting a single color, and a plurality of second pixel units 32 having different emission colors may form one pixel, for example, one second pixel unit 32 having red emission color, one second pixel unit 32 having blue emission color, and one second pixel unit 32 having green emission color form one pixel.
A total reflection structure is a structure that allows light entering the structure to be totally reflected inside the structure. According to the principle of total reflection of light, the total reflection structure includes a high refractive index portion and a low refractive index portion, and the junction surface of the two portions is referred to as a total reflection surface F, and light emitted from the first pixel unit 31 enters the high refractive index portion and can be totally reflected at the junction surface of the high refractive index portion and the low refractive index portion, that is, the total reflection surface F.
The total reflection surface F may partially surround the first pixel unit 31, and in some possible embodiments, as shown in fig. 4, the total reflection surface F is continuous in the circumferential direction and is not closed in the circumferential direction so as to partially surround the first pixel unit 31. In other possible embodiments, as shown in fig. 5, the total reflection surface F is discontinuous in the circumferential direction and is arranged over the entire periphery of the first pixel unit 31.
In the embodiment in which the total reflection surface F partially surrounds the first pixel unit 31, a part of the light rays emitted by the first pixel unit 31 with a relatively large forward light emitting inclination angle is totally reflected by the total reflection surface F and becomes forward light emitting light rays, and the other part of the light rays are not affected by the total reflection structure and continue to emit along the original direction.
The total reflection surface F may be disposed around the entire periphery of the first pixel unit 31, so that the light emitted by the first pixel unit 31 with a relatively large angle of inclination with respect to the forward light can be changed into the forward light through total reflection by the total reflection surface F.
The display panel provided by the embodiment of the application is provided with the first pixel unit 31 positioned in the total reflection structure and the second pixel unit 32 positioned outside the total reflection structure, and the light rays with larger relative forward light-emitting inclination angles emitted by the first pixel unit 31 can be totally reflected through the total reflection surface F in the total reflection structure, so that the light-emitting angles of the light rays with larger relative forward light-emitting inclination angles emitted by the first pixel unit 31 are changed to be forward light-emitting light rays, and the forward light-emitting quantity of the display panel is ensured; the second pixel unit 32 is located outside the total reflection structure, so that the light emitted by the second pixel unit 32 can be dispersed in all directions, thereby ensuring the large viewing angle display performance of the display panel.
In the above embodiment, a first pixel unit 31 may be disposed in a total reflection structure for totally reflecting light emitted from the first pixel unit 31. The plurality of first pixel units 31 may share one total reflection structure, for example, three first pixel units 31 having different emission colors constituting one pixel may share one total reflection structure.
The arrangement manner of the first pixel units 31 and the second pixel units 32 on the display panel is not limited, and preferably, the plurality of first pixel units 31 and the plurality of second pixel units 32 are alternately arranged on the display panel, so that the plurality of first pixel units 31 and the plurality of second pixel units 32 are uniformly arranged on the display panel, and the display panel can obtain uniform and good display effect under the conditions that the first pixel units 31 emit light independently and the second pixel units 32 emit light independently.
In an alternative embodiment, the plurality of first pixel units 31 constitute a plurality of first pixels, each of which includes three first pixel units 31 having different emission colors. The plurality of second pixel units 32 constitute a plurality of second pixels, each of which includes three second pixel units 32 different in emission color. The first pixels and the second pixels are arranged in an array, and in each row and each column, the first pixels and the second pixels are arranged at intervals, so that the first pixels and the second pixels are uniformly distributed.
With continued reference to fig. 3, in one possible embodiment, the display panel includes a substrate 11 and a driving circuit layer 12, a planarization layer (Planarization Layer, PLN) 13, and a pixel defining layer 20 (pixel defining layer, PLN) stacked on the substrate 11.
The driving circuit layer 12 is provided therein with a first pixel circuit for driving each first pixel unit 31 and a second pixel circuit for driving each second pixel unit 32, and the first pixel circuit and the second pixel circuit may be, for example, thin film transistor (Thin Film Transistor, abbreviated as TFT) driving circuits. Illustratively, as shown in fig. 3, the driving circuit layer 12 includes a buffer layer (buffer) 121, an active layer 122, a Gate Insulator (GI) 123, a first metal layer 124, a capacitor insulating layer (Capacitor Insulator, CI) 125, a second metal layer 126, an interlayer insulating layer (Inter Layer Dielectric, ILD) 127, and a third metal layer 128, which are sequentially stacked on the substrate 11, and the planarization layer 13 covers the third metal layer 128.
The material of the active layer 122 is typically a semiconductor material, such as silicon or silicon carbide. The active layer 122 includes a source region formed by doping an n-type impurity in the active layer, a drain region formed by doping a p-type impurity in the active layer, and a channel region connecting the source region and the drain region. The source and drain regions may be formed by an Ion implantation (Ion Doping) process, for example.
The first metal layer 124 includes a first electrode plate of a gate electrode and a capacitor of a thin film transistor in the first pixel circuit and the second pixel circuit, the second metal layer 126 includes a second electrode plate of a capacitor in the first pixel circuit and the second pixel circuit, the third metal layer 128 includes a source drain electrode in the first pixel circuit and the second pixel circuit, the source drain electrode of the first pixel circuit is connected to the first pixel unit 31 and the active layer 122, and the source drain electrode of the second pixel circuit is connected to the second pixel unit 32 and the active layer.
The buffer layer 121, the gate insulating layer 123, the capacitor insulating layer 125, and the interlayer insulating layer 127 may be inorganic material layers made of silicon oxide, silicon nitride, silicon oxynitride, or the like. The first metal layer 124, the second metal layer 126, and the third metal layer 128 may be metal film layers made of molybdenum, titanium, or the like.
With continued reference to fig. 3, the planarization layer 13 is provided with a plurality of first grooves 131, the pixel defining layer 20 forms second grooves 23 within the first grooves 131, and the bottom wall of the second grooves 23 is provided with first pixel openings 21. The first pixel unit 31 is located in the first pixel opening 21. The refractive index of the pixel defining layer 20 is greater than the refractive index of the planarization layer 13. Thus, the side wall of the first groove 131 and the side wall of the second groove 23 form the total reflection structure, and the junction surface of the side wall of the first groove 131 and the side wall of the second groove 23 is the total reflection surface F of the total reflection structure. As shown in fig. 3, the light emitted from the first pixel unit 31 with a relatively large angle of inclination with respect to the forward light emission is totally reflected when entering the junction surface of the sidewall of the first groove 131 and the sidewall of the second groove 23, so that the light is changed into the forward light emission light, thereby ensuring the forward light emission amount of the display panel.
The pixel defining layer 20 is provided with a second pixel opening 22 in a region outside the second recess 23, and the second pixel unit 32 is located in the second pixel opening 22. Since the periphery of the second pixel unit 32 is not provided with the total reflection structure, as shown in fig. 3, the light emergent angle of the second pixel unit 32 is not affected by the total reflection structure, so that the light emitted by the second pixel unit 32 can be dispersed in all directions, thereby ensuring the large viewing angle display performance of the display panel.
In the above embodiment, the planarization layer 13 and the pixel defining layer 20 are used to form the total reflection structure, so that the structure and the processing process of the display panel are simplified, and the production cost of the display panel is reduced.
The materials of the planarization layer 13 and the pixel defining layer 20 are not limited, and may be, for example, organic materials such as polyimide and resin, as long as the refractive index of the pixel defining layer 20 is ensured to be larger than that of the planarization layer 13. Illustratively, the material of the pixel defining layer 20 is phenyl silicone with a refractive index of about 1.58, and the material of the planarization layer 13 is methyl silicone with a refractive index of about 1.43.
In the above embodiment, the number of the first pixel openings 21 provided on the bottom wall of the second groove 23 is not limited, and the number of the first pixel openings 21 on the bottom wall of each second groove 23 may be the same or different. In some embodiments, as shown in fig. 3, one first pixel opening 21 is provided on the bottom wall of each second groove 23, and a first pixel unit 31 is provided in the first pixel opening 21. In this way, the distance between the sidewall of the second groove 23 and the sidewall of the first groove 131 and the first pixel unit 31 is smaller, so that more light rays emitted by the first pixel unit 31 can be totally reflected through the combination surface of the planarization layer 13 and the pixel defining layer 20, thereby improving the forward light output of the display panel.
In other embodiments, three first pixel openings 21 are disposed on the bottom wall of each second groove 23, and three first pixel units 31 with different light emission colors are disposed in the three first pixel openings 21, for example, one first pixel unit 31 with red light emission color, one first pixel unit 31 with blue light emission color, and one first pixel unit 31 with green light emission color are disposed in each of the three first pixel units 31, and the three first pixel units 31 form one pixel. By such a design, the light mixing effect of each first pixel unit 31 in one pixel can be improved, and the display effect of the display panel can be further improved.
With continued reference to fig. 3, in some embodiments, the first groove 131 is formed by recessing a surface of the planarization layer 13 on a side facing away from the substrate, for example, after the planarization layer 13 is prepared, the first groove 131 may be formed on the planarization layer 13 at a location where the first groove 131 is required to be disposed using a photolithography-dry etching process. In other embodiments, as shown in fig. 6, a plurality of third grooves 1211 are disposed on the buffer layer 121, for example, the buffer layer 121 with the plurality of third grooves 1211 may be formed by a photolithography process, and since the gate insulating layer 123, the capacitor insulating layer 125, the interlayer insulating layer 127, and the planarization layer 13 are sequentially stacked on the buffer layer 121, the depth of the third grooves 1211 and the thickness of the planarization layer 13 are matched, so that the planarization layer 13 is insufficient to planarize the third grooves 1211, and thus a recess is formed on the surface of the planarization layer 13 at a position corresponding to each third groove 1211, and the recess is the first groove 131.
In the above embodiment, the third grooves 1211 are provided on the buffer layer 121, and the planarization layer 13 is insufficient to planarize the third grooves 1211, and the depth of the third grooves 1211 is, for example, 0.6-1.5 micrometers, and the thickness of the planarization layer 13 is 1-1.5 micrometers, so that the first grooves 131 are formed on the surface of the planarization layer 13, thereby further simplifying the processing process of the display panel.
Further, as shown in fig. 6, the front projections of the first pixel circuits on the substrate 11 are each located within the front projection of the corresponding third recess 1211 on the substrate 11, so that the third recess 1211 is sufficiently sized to arrange the first pixel circuits of the first pixel units 31 located within the corresponding first recess 131 so as to be able to form the first recess 131 of a sufficient depth on the surface of the planarization layer 13. By the design, more light rays can be reflected totally through the combination surface of the planarization layer 13 and the pixel limiting layer 20 in the light rays emitted by the first pixel units 31, so that the forward light output of the display panel is improved.
Further, as shown in fig. 4 and 6, the display panel includes an encapsulation layer 40 covering the pixel defining layer 20, and the refractive index of the encapsulation layer 40 is greater than that of the pixel defining layer 20. The design is such that the side wall of the second groove 23 of the pixel defining layer 20 and the encapsulation layer 40 also form a total reflection structure, and the junction surface of the side wall of the second groove 23 and the encapsulation layer 40 is the total reflection surface F of the total reflection structure. The light emitted by the first pixel unit 31 with a relatively large angle of inclination with respect to the forward light output is totally reflected when entering the junction surface of the side wall of the second groove 23 and the encapsulation layer 40, so that the light is changed into the forward light output, thereby further improving the forward light output of the display panel.
The material of the encapsulation layer 40 is not limited as long as the refractive index of the encapsulation layer 40 is ensured to be greater than that of the pixel defining layer 20. Illustratively, the material of the pixel defining layer 20 is phenyl silicone with a refractive index of about 1.58, the material of the encapsulation layer 40 is silicon oxynitride, the refractive index of the silicon oxynitride is affected by the molar ratio of nitrogen and oxygen therein, the refractive index of the silicon oxynitride varies between 1.52 and 2.0, the greater the molar ratio of nitrogen and oxygen, the greater the refractive index of the silicon oxynitride, such that by adjusting the molar ratio of nitrogen and oxygen of the silicon oxynitride, the refractive index of the silicon oxynitride can be made greater than 1.58.
In the above-described embodiment, the side walls of the first grooves 131 and the side walls of the second grooves 23 form the total reflection structure by providing the first grooves 131 on the planarization layer 13 and forming the second grooves 23 on the pixel defining layer 20 using the first grooves 131. Of course, it is understood that the total reflection structure is not limited thereto, and for example, in the embodiment shown in fig. 7, the display panel includes a plurality of protrusions 80 disposed on the planarization layer 13, the pixel defining layer 20 covers each protrusion 80 and the planarization layer 13, and the refractive index of the pixel defining layer 20 is greater than that of the protrusions 80, so that the pixel defining layer 20 forms the upper protrusion 24 at each protrusion 80, the upper protrusion 24 and the protrusions 80 form the above-mentioned total reflection structure, and the combined surface of the upper protrusion 24 and the protrusions 80 is the total reflection surface of the total reflection structure.
In the above embodiment, the bump 80 is formed on the planarization layer 13 and cooperates with the pixel defining layer 20 to form a total reflection structure, so that the design can ensure the flatness of the upper surface of the planarization layer 13, thereby improving the flatness of each first pixel unit 31 and each second pixel unit 32, and further improving the display effect of the display panel.
It will be appreciated that in some embodiments, the protrusion 80 partially surrounds the first pixel cell 31 such that the protrusion 80 and the upper protrusion 24 form a fully reflective surface F that partially surrounds the first pixel cell 31. In other embodiments, the protrusion 80 is ring-shaped such that the protrusion 80 and the upper protrusion 24 form a total reflection surface F around the entire periphery of the first pixel unit 31.
The material of the protrusion 80 is not limited as long as the refractive index of the pixel defining layer 20 is ensured to be greater than that of the protrusion 80. Illustratively, the material of the pixel defining layer 20 is phenyl silicone with a refractive index of about 1.58, and the material of the protrusions 80 is methyl silicone with a refractive index of about 1.43.
Further, the embodiment of the application also provides a display device, which comprises the first driving chip, the second driving chip and the display panel. The first driving chip is connected with each first pixel unit in a signal mode, and the second driving chip is connected with each second pixel unit in a signal mode. The design is such that the control of the first pixel unit and the second pixel unit are mutually independent to meet different display scene requirements.
Illustratively, in response to a control instruction to switch to the first display mode, the first driving chip drives each first pixel unit to emit light, and the second driving chip does not operate; and responding to a control instruction for switching to the second display mode, the second driving chip drives each second pixel unit to emit light, and the first driving chip does not work.
In the above embodiment, the display device may be any device having a display function, for example, may be a mobile device such as a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), or may be a non-mobile device such as a personal computer (personal computer, PC), a Television (TV), a teller machine or a self-service machine.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
It should be readily understood that the terms "on … …", "above … …" and "above … …" in this application should be interpreted in the broadest sense such that "on … …" means not only "directly on something" but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes the meaning of "not only" on something "or" above "but also" above "or" above "without intermediate features or layers therebetween (i.e., directly on something).
The term "substrate" as used herein refers to a material upon which subsequent layers of material are added. The substrate itself may be patterned. The material added atop the substrate may be patterned or may remain unpatterned. In addition, the substrate may comprise a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, and the like. Alternatively, the substrate may be made of a non-conductive material (e.g., glass, plastic, or sapphire wafer, etc.).
The term "layer" as used herein may refer to a portion of material that includes regions having a certain thickness. The layer may extend over the entire underlying or overlying structure, or may have a range that is less than the range of the underlying or overlying structure. Further, the layer may be a region of a continuous structure, either homogenous or non-homogenous, having a thickness less than the thickness of the continuous structure. For example, the layer may be located between the top and bottom surfaces of the continuous structure or between any pair of lateral planes at the top and bottom surfaces. The layers may extend laterally, vertically and/or along a tapered surface. The substrate may be a layer, may include one or more layers therein, and/or may have one or more layers located thereon, and/or thereunder. The layer may comprise a plurality of layers. For example, the interconnect layer may include one or more conductors and contact layers (within which contacts, interconnect lines, and/or vias are formed) and one or more dielectric layers.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. The display panel is characterized by comprising a substrate, a plurality of total reflection structures arranged on the substrate, a plurality of first pixel units and a plurality of second pixel units arranged on the substrate, wherein the plurality of first pixel units are positioned in the total reflection structures, and the plurality of second pixel units are positioned outside the total reflection structures;
at least one first pixel unit is arranged in each total reflection structure, each total reflection structure comprises a total reflection surface at least partially surrounding the first pixel unit in the total reflection structure, and the total reflection structure is configured to totally reflect at least part of light rays emitted by the first pixel unit and incident on the total reflection surface out of the display panel along the forward direction of the display panel.
2. The display panel according to claim 1, wherein the display panel includes a planarization layer provided on the substrate and a pixel defining layer covering the planarization layer, the pixel defining layer having a refractive index greater than that of the planarization layer;
the planarization layer is provided with a plurality of first grooves, the pixel limiting layer forms a second groove in each first groove, the bottom wall of the second groove is provided with a first pixel opening, and the first pixel unit is located in the first pixel opening.
3. The display panel according to claim 2, wherein the side walls of the first groove and/or the side walls of the second groove form the total reflection structure, and a junction surface between the side walls of the first groove and/or the side walls of the second groove forms the total reflection surface.
4. The display panel of claim 2, wherein one of the first pixel openings is provided on a bottom wall of each of the second grooves.
5. The display panel according to claim 2, wherein three first pixel openings are provided on the bottom wall of each of the second grooves, one first pixel unit is provided in each of the three first pixel openings, and the light emission colors of the first pixel units in the three first pixel openings are all different.
6. The display panel according to claim 2, wherein a region of the pixel defining layer located outside the second recess is provided with a second pixel opening, and the second pixel unit is located in the second pixel opening.
7. The display panel according to claim 2, further comprising a buffer layer disposed between the substrate and the planarization layer, the planarization layer and the pixel defining layer being disposed on the buffer layer, the buffer layer being provided with a plurality of third grooves, the planarization layer forming one of the first grooves in each of the third grooves.
8. The display panel of claim 7, wherein the depth of the third groove is 0.6-1.5 microns.
9. The display panel of claim 7, wherein the planarizing layer has a thickness of 1-1.5 microns.
10. The display panel according to any one of claims 2 to 9, further comprising an encapsulation layer covering the pixel defining layer, the encapsulation layer having a refractive index greater than a refractive index of the pixel defining layer.
11. The display panel according to claim 1, further comprising a planarization layer provided on the substrate, a plurality of protrusions provided on the planarization layer, and a pixel defining layer covering each of the protrusions and the planarization layer, the pixel defining layer having a refractive index greater than that of the protrusions, the pixel defining layer forming an upper protrusion at each of the protrusions, the upper protrusion and the protrusions forming the total reflection structure, a junction surface of the upper protrusion and the protrusions forming the total reflection surface.
12. A display device comprising a first driving chip, a second driving chip and the display panel according to any one of claims 1 to 11, wherein the first driving chip is in signal connection with each of the first pixel units, and the second driving chip is in signal connection with each of the second pixel units.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037357A (en) * | 2014-06-05 | 2014-09-10 | 京东方科技集团股份有限公司 | Organic light emitting display device and manufacturing method thereof |
| KR20180135342A (en) * | 2017-06-12 | 2018-12-20 | 엘지디스플레이 주식회사 | Display Device And Method For Driving Of The Same |
| CN112038357A (en) * | 2020-08-31 | 2020-12-04 | 上海天马有机发光显示技术有限公司 | Display panel, display device and preparation method |
| CN113078193A (en) * | 2021-03-24 | 2021-07-06 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113272988A (en) * | 2019-01-07 | 2021-08-17 | 三星显示有限公司 | Display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102523344B1 (en) * | 2015-11-25 | 2023-04-20 | 삼성디스플레이 주식회사 | Organic light emitting display device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037357A (en) * | 2014-06-05 | 2014-09-10 | 京东方科技集团股份有限公司 | Organic light emitting display device and manufacturing method thereof |
| KR20180135342A (en) * | 2017-06-12 | 2018-12-20 | 엘지디스플레이 주식회사 | Display Device And Method For Driving Of The Same |
| CN113272988A (en) * | 2019-01-07 | 2021-08-17 | 三星显示有限公司 | Display device |
| CN112038357A (en) * | 2020-08-31 | 2020-12-04 | 上海天马有机发光显示技术有限公司 | Display panel, display device and preparation method |
| CN113078193A (en) * | 2021-03-24 | 2021-07-06 | 武汉天马微电子有限公司 | Display panel and display device |
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