CN108878493B - Display panel and display device - Google Patents
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- CN108878493B CN108878493B CN201810696946.4A CN201810696946A CN108878493B CN 108878493 B CN108878493 B CN 108878493B CN 201810696946 A CN201810696946 A CN 201810696946A CN 108878493 B CN108878493 B CN 108878493B
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The invention discloses a display panel and a display device, which belong to the technical field of display and comprise: a plurality of pixels, the pixels including a first color sub-pixel; the first color sub-pixel comprises a light emitting control switch and an organic light emitting diode; the pixel comprises at least one composite sub-pixel comprising at least one said first colour sub-pixel and at least one inorganic light emitting diode; in the same composite sub-pixel, the colors of the inorganic light emitting diode and the organic light emitting diode are the same. Compared with the prior art, the service life of the display panel can be prolonged, and therefore the display quality of the display panel is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The most information-receiving of human sensory organs is the visual organ (eye), and people are increasingly required to utilize abundant visual information in production and life, so that display technology plays a very important role in the human society today. Display technologies have appeared to date, and the development of the technologies is also very rapid, and cathode ray tube technologies (CRT), Plasma Display (PDP), Liquid Crystal Display (LCD), and even the latest Organic Light Emitting Display (OLED) and micro light emitting diode (micro LED) display technologies have appeared in succession.
With the development of society and the increasing demand of human beings for living, the current display technology is rapidly advancing toward narrow frame, high contrast, high resolution, full color display, low power consumption, high reliability, long life, and thinness and lightness. In particular, how to increase the service life of the display panel and improve the display quality of the display panel is one of the important directions of research and development.
Disclosure of Invention
In view of the foregoing, the present invention provides a display panel and a display device.
The present invention provides a display panel, comprising: a plurality of pixels, the pixels including a first color sub-pixel; the first color sub-pixel comprises a light emitting control switch and an organic light emitting diode; the pixel comprises at least one composite sub-pixel comprising at least one said first colour sub-pixel and at least one inorganic light emitting diode; in the same composite sub-pixel, the colors of the inorganic light emitting diode and the organic light emitting diode are the same.
The invention also provides a display device comprising the display panel provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
compared with an organic light emitting diode, an inorganic light emitting diode has the advantages of high response speed, high brightness, long service life, high power efficiency and the like. At least one inorganic light emitting diode is arranged in the composite sub-pixel with respect to the conventional first color sub-pixel, and the organic light emitting diode and the inorganic light emitting diode in the composite sub-pixel emit light in the same color. Compared with the conventional first color sub-pixel, the service life of the composite sub-pixel is longer, so that the service life of the display panel can be prolonged. In addition, in the organic light emitting diode, as the use time increases, the performance of the light emitting material is attenuated and the light emitting efficiency is reduced, and the inorganic light emitting diode has a longer service life and slower performance attenuation, so that the inorganic light emitting diode can compensate the performance degradation of the organic light emitting diode, thereby improving the display quality of the display panel.
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 cross-sectional view taken along line CC' of FIG. 1;
FIG. 3 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
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. 1 and fig. 2, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view taken along line CC' in fig. 1. The present embodiment provides a display panel including:
a plurality of pixels 10, the pixels 10 comprising a first color sub-pixel 11;
the first color sub-pixel 11 includes a light emission control switch 111 and an organic light emitting diode 112;
the pixel 10 comprises at least one composite sub-pixel FP1, the composite sub-pixel FP1 comprises at least one said first color sub-pixel 11 and at least one inorganic light emitting diode 113;
in the same composite sub-pixel FP1, the colors of the inorganic light emitting diode 113 and the organic light emitting diode 112 are the same.
In this embodiment, a plurality of pixels may be disposed in the display area AA, and the shape and size of the display area AA are not particularly limited in this embodiment.
It should be noted that, in this embodiment, only the pixel 10 includes three sub-pixels as an example, and optionally, the three sub-pixels are the first color sub-pixel 11, the second color sub-pixel 12, and the third color sub-pixel 13, respectively. It will be understood by those skilled in the art that there are many sub-pixels in a pixel, for example, a pixel may include two sub-pixels or four sub-pixels, and the present embodiment is not limited to the number of sub-pixels in the pixel. In addition, the color of the sub-pixels is not particularly limited in this embodiment, and optionally, the first color sub-pixel 11 may be a blue sub-pixel, the second color sub-pixel 12 may be a green sub-pixel, and the third color sub-pixel 13 may be a red sub-pixel.
In the present embodiment, the first color sub-pixel 11 includes a light emission control switch 111 and an organic light emitting diode 112; the light-emitting control switch 111 may be a Thin Film Transistor (TFT); the Organic Light Emitting Diode 112 (OLED) may include an anode 112A, a cathode 112B, and a Light Emitting material 112C sandwiched between the anode 112A and the cathode 112B, wherein the anode 112A and the cathode 112B are respectively provided with appropriate voltages, and holes of the anode 112A and electrons of the cathode 112B can be combined in the Light Emitting material 112C to emit Light. Optionally, the display panel further includes a substrate base 00, and a buffer layer 01 is included between the substrate base and the light emission control switch 111.
In the display panel provided by this embodiment, at least one first color sub-pixel 11 is a composite sub-pixel FP1, and the composite sub-pixel FP1 includes at least one inorganic light emitting diode 113, a light emitting control switch 111, and an organic light emitting diode 112; in addition, in the same composite subpixel FP1, the colors of the inorganic light emitting diode 113 and the organic light emitting diode 112 are the same. In this embodiment, only the composite sub-pixel FP1 including one inorganic light emitting diode 113 is taken as an example for explanation, and the inorganic light emitting diode 113 and the organic light emitting diode 112 are disposed adjacently; the adjacent arrangement of the inorganic light emitting diode 113 and the organic light emitting diode 112 means that no other inorganic light emitting diode or organic light emitting diode is arranged between the inorganic light emitting diode 113 and the organic light emitting diode 112 in the same composite subpixel FP 1.
In other alternative embodiments of the present invention, the composite sub-pixel FP1 may include two or more inorganic light emitting diodes 113, which are not described in detail in this embodiment.
Compared with an organic light emitting diode, an inorganic light emitting diode has the advantages of high response speed, high brightness, long service life, high power efficiency and the like. In this embodiment, at least one inorganic light emitting diode 113 is disposed in the composite subpixel FP1, and the organic light emitting diode 112 and the inorganic light emitting diode 113 in the composite subpixel FP1 emit the same color as the conventional first color subpixel 11. Compared with the conventional first color sub-pixel 11, the life of the composite sub-pixel FP1 is longer, and thus the service life of the display panel can be improved. In addition, in the organic light emitting diode, with the increase of the use time, the performance of the luminescent material is attenuated and the luminous efficiency is reduced, and the inorganic light emitting diode has a longer service life and slower performance attenuation, so that the inorganic light emitting diode can make up the performance degradation phenomenon of the organic light emitting diode, and the display quality of the display panel is improved.
It should be noted that there are various pixel arrangement structures. In the display panel shown in fig. 1, only one arrangement structure of pixels is illustrated, in which, alternatively, a plurality of pixels 10 are arranged in a row direction and a column direction; in the same composite subpixel FP1, the inorganic light emitting diode 113 and the organic light emitting diode 112 are arranged in the row direction. Alternatively, in the same pixel 10, three sub-pixels are arranged in the column direction.
Optionally, in the display panel provided in the embodiment of the present invention, there may be a plurality of pixel arrangement structures, for example, please refer to fig. 3, and fig. 3 is a schematic plan structure diagram of another display panel provided in the embodiment of the present invention. Fig. 3 illustrates an arrangement structure of a delta-structured pixel, in which three sub-pixels in the pixel 10 are arranged in a triangle. Optionally, in the display panel shown in fig. 3, the first color sub-pixels 11 are all composite sub-pixels FP1, and in the composite sub-pixels FP1, the inorganic light emitting diodes 113 and the organic light emitting diodes 112 are arranged along the row direction. Specifically, the organic light emitting diodes 112 of the three sub-pixels in the pixel 10 are arranged in a triangle, and such pixel arrangement can enable other sub-pixels with different colors to be arranged on the periphery of one sub-pixel, thereby improving the color mixing effect of each pixel and improving the display quality. In addition, since the inorganic light emitting diode 113 is located inside the pixel 10 arranged in a triangle, i.e. at the geometric center of the triangular pixel unit formed by three colors of RGB, it is beneficial to better color mixing of the inorganic light emitting diode 113 and other sub-pixels in the pixel 10, and improve the display quality.
Optionally, referring to fig. 4, fig. 4 is a schematic plan view of another display panel according to an embodiment of the present invention. Fig. 4 differs from fig. 3 in that in the composite subpixel FP1, the inorganic light emitting diode 113 and the organic light emitting diode 112 are arranged in the column direction.
In fig. 4, the inorganic light emitting diode 113 is positioned between two organic light emitting diodes 112 having different colors from them in the column direction. Alternatively, the inorganic light emitting diode 113 is positioned between the red organic light emitting diode 112 and the blue organic light emitting diode 112. It will be understood by those skilled in the art that the display panel provided by the embodiments of the present invention may have various pixel arrangement structures, and fig. 1, fig. 3 and fig. 4 are only exemplary illustrations, and should not be construed as a specific limitation to the present invention.
In some alternative embodiments, with continued reference to fig. 1 and 2, the light emitting control switch 111 includes a semiconductor portion T2, a gate T1, a source T3, and a drain T4;
the inorganic light emitting diode 113 includes a first semiconductor layer 113P and a second semiconductor layer 113N;
in the same composite subpixel FP1, the semiconductor portion T2 of the emission control switch 111 and the first semiconductor layer 113P of the inorganic light emitting diode 113 are electrically connected.
In this embodiment, the first semiconductor layer 113P of the inorganic light emitting diode 113 may be a P-type semiconductor layer, and the second semiconductor layer 113N may be an N-type semiconductor layer. Optionally, a quantum well layer 113F is sandwiched between the first semiconductor layer 113P and the second semiconductor layer 113N.
In the display panel provided in this embodiment, the first semiconductor layer 113P and the semiconductor portion T2 of the light emission control switch 111 are electrically connected, and the semiconductor portion T2 of the light emission control switch 111 is multiplexed as an electrode for applying a voltage to the first semiconductor layer 113P of the inorganic light emitting diode 113. When the display panel is in display operation, the light-emitting control switch 111 of the composite sub-pixel FP1 is turned on, the voltage of the source T3 is transmitted to the drain T4 through the semiconductor portion T2, at this time, the voltage of the semiconductor portion T2 is the same as the voltages of the source T3 and the drain T4, and the voltage of the semiconductor portion T2 is transmitted to the first semiconductor layer 113P of the inorganic light-emitting diode 113 to control the inorganic light-emitting diode 113 to emit light. When the light emission control switch 111 is turned on, the voltage of the source T3 is sequentially transmitted to the drain T4 and the anode 112A of the organic light emitting diode 112 through the semiconductor portion T2, and at this time, the voltage of the source T3 may control the organic light emitting diode 112 to emit light. Therefore, in the display panel provided by this embodiment, the organic light emitting diode 112 and the inorganic light emitting diode 113 in the same composite subpixel FP1 can emit light simultaneously, so that the display effect can be prevented from being reduced due to different light emitting times of the organic light emitting diode 112 and the inorganic light emitting diode 113, and the display quality of the display panel can be improved.
In addition, the semiconductor portion T2 of the multiplexing light-emitting control switch 111 is used as an electrode to apply a voltage to the first semiconductor layer 113P of the inorganic light-emitting diode 113, and additional process and material are not required to be added to manufacture the electrode of the inorganic light-emitting diode 113, which is beneficial to improving the manufacturing efficiency of the display panel and reducing the manufacturing cost. In addition, the electrodes of the inorganic light emitting diodes 113 are arranged without adding an additional film structure, which is beneficial to the lightening and thinning of the display panel.
Alternatively, in the display panel shown in fig. 1 and fig. 3, the gate lines (not shown) may extend along the row direction, in the composite sub-pixel FP1, the inorganic light emitting diodes 113 and the organic light emitting diodes 112 are arranged along the row direction, and the inorganic light emitting diodes 113 and the organic light emitting diodes 112 should be as close as possible to the gate lines, so as to reduce the length of the semiconductor portion of the light emission control switch, prevent the semiconductor portion from being too long and affecting the performance of the light emission control switch, and thus affecting the electrical signals received by the organic light emitting diodes 112, and avoid affecting the display effect. And the length of the semiconductor part of the light-emitting control switch is reduced, so that the light transmittance in the display panel is improved, and the display effect of transparent display is improved.
Alternatively, in the display panel shown in fig. 4, the gate line (not shown) may extend along the row direction and extend from between the inorganic light emitting diode 113 and the organic light emitting diode 112 of the composite sub-pixel FP1, and the light emitting control switch may be disposed between the inorganic light emitting diode 113 and the organic light emitting diode 112 to reduce the length of the semiconductor portion of the light emitting control switch, so as to prevent the semiconductor portion from being too long and affecting the performance of the light emitting control switch, and thus affecting the electrical signal received by the organic light emitting diode 112, and avoid affecting the display effect. And the length of the semiconductor part of the light-emitting control switch is reduced, so that the light transmittance in the display panel is improved, and the display effect of transparent display is improved.
In some optional embodiments, with continuing reference to fig. 1 and 2, the display panel further includes:
a substrate base plate 00;
a planarization layer PLN and a pixel defining layer PDL disposed on the base substrate 00;
the pixel defining layer PDL includes a first opening area 21, the planarization layer PLN includes a second opening area 22, and the first opening area 21 and the second opening area 22 do not overlap in a direction perpendicular to the display panel; wherein, the direction perpendicular to the display panel is the Z direction in fig. 2;
the organic light emitting diode 112 is positioned at the first open area 21, and the inorganic light emitting diode 113 is positioned at the second open area 22.
In this embodiment, the planarization layer PLN is located between the light emission control switch 111 and the organic light emitting diode 112, and the anode 112A of the organic light emitting diode 112 is electrically connected to the drain T4 of the light emission control switch 111 through a via hole in the planarization layer PLN. The planarization layer PLN includes a second opening region 22, and the planarization layer PLN is provided with an opening for accommodating the inorganic light emitting diode 113 in the second opening region 22.
The pixel defining layer PDL is located on a side of the planarization layer PLN away from the substrate base 00, and the pixel defining layer PDL includes a first opening area 21, and the pixel defining layer PDL is provided with an opening for accommodating the organic light emitting diode 112 in the first opening area 21.
Alternatively, the first and second opening areas 21 and 22 do not overlap in a direction perpendicular to the display panel. The direction perpendicular to the display panel is the Z direction in fig. 2.
In the present embodiment, since the planarization layer PLN covers the light emission control switch 111, the inorganic light emitting diode 113 is disposed in the second opening region 22 of the planarization layer PLN, thereby facilitating the electrical connection of the first semiconductor layer 113P of the inorganic light emitting diode 113 and the semiconductor portion T2 of the light emission control switch 111. Please refer to the foregoing embodiments of the present invention for the advantageous effect of electrically connecting the first semiconductor layer 113P of the inorganic light emitting diode 113 and the semiconductor portion T2 of the light emitting control switch 111, which is not described herein again.
In some alternative embodiments, referring to fig. 2, the second semiconductor layer 113N is electrically connected to the first electrode portion 30. The first electrode portion 30 is used to apply a voltage to the second semiconductor layer 113N. The semiconductor portion T2 of the light emission control switch 111 is multiplexed as an electrode for applying a voltage to the first semiconductor layer 113P of the inorganic light emitting diode 113. When the semiconductor portion T2 and the first electrode portion 30 of the light emission control switch 111 are supplied with appropriate voltages, respectively, the inorganic light emitting diode 113 can turn on to emit light.
Alternatively, the first electrode portion 30 may be fabricated in a single fabrication process, or may be fabricated in the same fabrication process with other film layers in the display panel. Next, the present invention will be described with respect to the structure of the first electrode portion 30 exemplified here.
In some optional embodiments, please refer to fig. 5, and fig. 5 is a schematic cross-sectional structure diagram of another display panel provided in the embodiments of the present invention. The anode 112A of the organic light emitting diode 112 includes a first transparent conductive layer 112A1, a second transparent conductive layer 112A2, and a metallic silver layer 112A3 sandwiched between the first transparent conductive layer 112A1 and the second transparent conductive layer 112A 2; in the direction perpendicular to the display panel, the first transparent conductive layer 112a1, the second transparent conductive layer 112a2 and the metallic silver layer 112A3 are stacked; wherein, the direction perpendicular to the display panel is the Z direction in fig. 2;
the first electrode portion 30 is insulated from the anode 112A of the organic light emitting diode 112;
the material of the first electrode portion 30 is the same as that of the first transparent conductive layer 112a1, or the material of the first electrode portion 30 is the same as that of the second transparent conductive layer 112a 2.
In this embodiment, the light-emitting side of the display panel may be the side away from the substrate 00, and in order not to affect the light-emitting effect of the inorganic light-emitting diode 113, the first electrode portion 30 is made of a transparent material. The materials of the first transparent conductive layer 112a1 and the second transparent conductive layer 112a2 are both conductive materials with high light transmittance, and the materials of the two can be the same. Generally, the material of the first transparent conductive layer 112a1 and the second transparent conductive layer 112a2 may be Indium Tin Oxide (ITO). That is, the anode 112A of the organic light emitting diode 112 includes a three-layer structure, which is ITO-Ag-ITO in sequence.
In this embodiment, in the same manufacturing process, the first transparent conductive layer 112a1 and the first electrode portion 30, or the second transparent conductive layer 112a2 and the first electrode portion 30, may be formed simultaneously by patterning the same transparent conductive layer, so that it is not necessary to add an additional process to manufacture the first electrode portion 30, and it is not necessary to add an additional material to manufacture the first electrode portion 30, which is beneficial to improving the manufacturing efficiency of the display panel and reducing the manufacturing cost. In addition, the first electrode portion 30 and the first transparent conductive layer 112a1 are disposed on the same layer, or the first electrode portion 30 and the second transparent conductive layer 112a2 are disposed on the same layer, which is beneficial to the light and thin of the display panel without adding an additional film structure.
Optionally, referring to fig. 6, fig. 6 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention. The first electrode portion 30 includes a first sub-section 31 and a second sub-section 32; the first and second sub-sections 31 and 32 are stacked in a direction perpendicular to the display panel; wherein, the direction perpendicular to the display panel is the Z direction in fig. 2;
the first sub-portion 31 and the first transparent conductive layer 112a1 are made of the same material, and the second sub-portion 32 and the second transparent conductive layer 112a2 are made of the same material.
In this embodiment, the first electrode portion 30 may have a two-layer structure, and the materials of the first sub-portion 31 and the second sub-portion 32 are both conductive materials with high light transmittance.
In this embodiment, the first sub-portion 31 and the second sub-portion 32 of the first electrode portion 30 can be formed simultaneously during the process of manufacturing the anode 112A of the organic light emitting diode 112, so that the first electrode portion 30 is manufactured without adding an additional process, and the first electrode portion 30 is manufactured without adding an additional material, which is beneficial to improving the manufacturing efficiency of the display panel and reducing the manufacturing cost. In addition, the first electrode portion 30 and a part of the film layers of the anode 112A of the oled 112 are disposed on the same layer, and an additional film layer structure is not required, which is beneficial to the light and thin of the display panel.
Optionally, referring to fig. 7, fig. 7 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention. The first electrode portion 30 and the cathode 112B of the organic light emitting diode 112 are made of the same material. In this embodiment, the first electrode portion 30 may be formed simultaneously during the process of manufacturing the cathode 112B of the organic light emitting diode 112, so that an additional process is not required to manufacture the first electrode portion 30, and an additional material is not required to manufacture the first electrode portion 30, which is beneficial to improving the manufacturing efficiency of the display panel and reducing the manufacturing cost. In addition, the first electrode portion 30 and the cathode 112B of the oled 112 are disposed on the same layer, and an additional film structure is not required, which is beneficial to the light and thin display panel.
Alternatively, with continued reference to fig. 7, the first electrode portion 30 is electrically connected to the cathode 112B of the organic light emitting diode 112. In the embodiment, the first electrode portion 30 receives the voltage of the cathode, so that an additional voltage signal does not need to be provided for the first electrode portion 30, thereby facilitating simplification of the voltage signal of the display panel.
It should be noted that in the embodiment of the present invention, the inorganic light emitting diode 113 is not directly used in place of the organic light emitting diode 112, but only the inorganic light emitting diode 113 is used to compensate the lifetime and brightness of the organic light emitting diode 112. The main reason is that if the inorganic light emitting diode 113 is used to replace the organic light emitting diode 112, the driving circuit of the inorganic light emitting diode 113 is different from that of the organic light emitting diode 112, so that an additional driving circuit needs to be provided to drive the inorganic light emitting diode 113, the structure of the display panel is greatly changed, and the design difficulty of the display panel is increased. In the embodiment of the invention, since the organic light emitting diode 112 is used for compensating the lifetime and brightness of the inorganic light emitting diode 113, an additional driving circuit is not required to drive the inorganic light emitting diode 113, and the requirement can be satisfied by multiplexing the existing film layer manufacturing electrodes in the display panel to apply voltage to the inorganic light emitting diode 113. In addition, the difference in display effect between the sub-pixel using only the inorganic light emitting diode 113 to emit light and the sub-pixel using only the organic light emitting diode 112 to emit light can be avoided, and the display quality can be improved. The composite sub-pixel can compensate the performance degradation phenomenon of the organic light emitting diode, and can reduce the display difference between the inorganic light emitting diode 113 and the organic light emitting diode 112, thereby further improving the display quality of the display panel.
In some alternative embodiments, for example, referring to fig. 1 and fig. 2, in the display panel provided in any of the above embodiments of the present invention, the material of the semiconductor portion T2 includes a metal Oxide semiconductor, such as Indium Gallium Zinc Oxide (IGZO). IGZO is an amorphous oxide containing indium, gallium and zinc, is transparent in a thin film state, and has a carrier mobility 20-30 times that of amorphous silicon, so that the charge and discharge rate of the light-emitting control switch 111 can be greatly increased, the response speed of pixels is increased, a faster refresh rate is realized, and the line scanning rate of the pixels is also greatly increased due to faster response, so that ultrahigh resolution becomes possible in a display panel.
In some optional embodiments, in the display panel provided in any of the above embodiments of the present invention, for example, referring to fig. 1 and fig. 2, the first color sub-pixel 11 is a blue sub-pixel; the pixel 10 also includes a red sub-pixel and a green sub-pixel. The second color sub-pixel 12 may be a green sub-pixel, and the third color sub-pixel 13 may be a red sub-pixel.
In this embodiment, the blue sub-pixel may include a blue organic light emitting diode 112 and at least one blue inorganic light emitting diode 113.
It will be understood by those skilled in the art that, in the inorganic light emitting diode and the organic light emitting diode provided in the prior art, since the inorganic light emitting diode with blue color has the best light emitting efficiency and the organic light emitting diode with blue color has the worst light emitting efficiency, the blue sub-pixel is configured as a composite sub-pixel, and the inorganic light emitting diode and the organic light emitting diode are used together as the light emitting source of the blue sub-pixel.
However, in other alternative embodiments, the light emitting efficiency of the blue inorganic light emitting diode is not necessarily the best, and the light emitting efficiency of the blue organic light emitting diode is not necessarily the worst, because the materials or manufacturing processes for the organic light emitting diodes of different colors are different. Therefore, those skilled in the art should be able to set sub-pixels of other colors as composite sub-pixels as the practical situation. For example, a red sub-pixel may be provided as a composite sub-pixel, or a green sub-pixel may be provided as a composite sub-pixel.
Optionally, the display panel provided in any of the above embodiments of the present invention may be a "transparent display panel", that is, the display panel has a high light transmittance, and a technical effect of transparent display can be achieved. The transparent display panel can be applied to devices such as show windows and automobile windshields, and is one of the latest research and development directions of display technologies.
For example, referring to fig. 1 and 2, the substrate 00 is a transparent substrate; for example, the base substrate 00 is made of glass or a resin material having high transmittance.
The first color sub-pixel 11 includes a light emitting region 40 and a light transmitting region 41, and the organic light emitting diode 112 and the pixel driving circuit are located only in the light emitting region 40; the pixel driving circuit may include a thin film transistor and a capacitor, and the specific circuit structure of the pixel driving circuit is not limited in this embodiment. Since the thin film transistor and the capacitor may include a material with low light transmittance, the pixel driving circuit is located in the light emitting region 40, and the pixel driving circuit is located on the back of the light emitting side of the organic light emitting diode 112, so that the organic light emitting diode 112 shields the pixel driving circuit from being observed by human eyes to affect the transmittance of the display panel.
The light-transmitting region 41 is disposed around a region where the inorganic light emitting diode 113 is located.
The light emitting region 40 includes a region where the organic light emitting diode 112 is located, and the light transmitting region 41 is a region of the first color sub-pixel other than the light emitting region 40. The film structures in the light-transmitting region 41 are made of transparent materials. In the transparent display panel, the ratio of the light-transmitting region 41 in the display panel is high, thereby forming a technical effect of transparent display. In this embodiment, the inorganic light emitting diode 113 is disposed inside the light transmitting region 41, so that the area of the light transmitting region 41 is large, and the inorganic light emitting diode 113 can be manufactured into a micro LED, so that the volume of the inorganic light emitting diode 113 is small, and the influence on the light transmittance of the light transmitting region 41 is small.
The invention also provides a display device comprising the display panel provided by 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 1000 including the display panel 1001 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 1000, 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 display window, 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 display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
According to the embodiment, the invention at least realizes the following beneficial effects:
compared with an organic light emitting diode, an inorganic light emitting diode has the advantages of high response speed, high brightness, long service life, high power efficiency and the like. At least one inorganic light emitting diode is arranged in the composite sub-pixel with respect to the conventional first color sub-pixel, and the organic light emitting diode and the inorganic light emitting diode in the composite sub-pixel emit light in the same color. Compared with the conventional first color sub-pixel, the service life of the composite sub-pixel is longer, so that the service life of the display panel can be prolonged. In addition, in the organic light emitting diode, as the use time increases, the performance of the light emitting material is attenuated and the light emitting efficiency is reduced, and the inorganic light emitting diode has a longer service life and slower performance attenuation, so that the inorganic light emitting diode can compensate the performance degradation of the organic light emitting diode, thereby improving the display quality of the display panel.
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 (12)
1. A display panel, comprising:
a plurality of pixels, the pixels comprising a first color sub-pixel;
the first color sub-pixel comprises a light emitting control switch and an organic light emitting diode;
the pixel comprises at least one composite sub-pixel comprising at least one said first color sub-pixel and at least one inorganic light emitting diode;
in the same composite sub-pixel, the colors of the inorganic light-emitting diode and the organic light-emitting diode are the same;
the display panel further includes:
a substrate base plate;
a planarization layer and a pixel defining layer disposed on the base substrate;
the pixel defining layer includes a first opening area, the planarization layer includes a second opening area, and the first opening area and the second opening area do not overlap in a direction perpendicular to the display panel;
the organic light emitting diode is located at the first open area, and the inorganic light emitting diode is located at the second open area.
2. The display panel according to claim 1,
the light emitting control switch comprises a semiconductor part, a grid electrode, a source electrode and a drain electrode;
the inorganic light emitting diode includes a first semiconductor layer and a second semiconductor layer;
in the same composite sub-pixel, the semiconductor part of the light-emitting control switch and the first semiconductor layer of the inorganic light-emitting diode are electrically connected.
3. The display panel according to claim 2,
the second semiconductor layer is electrically connected to the first electrode portion.
4. The display panel according to claim 3,
the anode of the organic light-emitting diode comprises a first transparent conducting layer, a second transparent conducting layer and a metal silver layer clamped between the first transparent conducting layer and the second transparent conducting layer; the first transparent conductive layer, the second transparent conductive layer and the metal silver layer are stacked in a direction perpendicular to the display panel;
the first electrode portion is insulated from the anode of the organic light emitting diode;
the first electrode portion and the first transparent conductive layer are made of the same material, or the first electrode portion and the second transparent conductive layer are made of the same material.
5. The display panel according to claim 4,
the first electrode portion includes a first sub-portion and a second sub-portion; the first sub-portion and the second sub-portion are stacked in a direction perpendicular to the display panel;
the first sub-portion and the first transparent conductive layer are made of the same material, and the second sub-portion and the second transparent conductive layer are made of the same material.
6. The display panel according to claim 3,
the first electrode portion and the cathode of the organic light emitting diode are made of the same material.
7. The display panel according to claim 6,
the first electrode portion is electrically connected to a cathode of the organic light emitting diode.
8. The display panel according to claim 1,
the plurality of pixels are arranged in a row direction and a column direction;
in the same composite sub-pixel, the inorganic light emitting diode and the organic light emitting diode are arranged along the row direction.
9. The display panel according to claim 2,
the material of the semiconductor portion includes a metal oxide semiconductor.
10. The display panel according to claim 1,
the first color sub-pixel is a blue sub-pixel;
the pixel also includes a red sub-pixel and a green sub-pixel.
11. The display panel according to claim 1,
the substrate base plate is a transparent base plate;
the first color sub-pixel comprises a light emitting area and a light transmitting area, and the organic light emitting diode and the pixel driving circuit are only positioned in the light emitting area;
the light-transmitting area is arranged around the area where the inorganic light-emitting diode is located.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN201810696946.4A CN108878493B (en) | 2018-06-29 | 2018-06-29 | Display panel and display device |
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| WO2020133161A1 (en) * | 2018-12-28 | 2020-07-02 | 华为技术有限公司 | Display screen, electronic device, and display screen manufacturing method |
| CN109979981B (en) * | 2019-03-29 | 2021-05-14 | 上海天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN110491909B (en) * | 2019-07-29 | 2021-12-24 | 武汉华星光电技术有限公司 | Display panel |
| KR20210063056A (en) * | 2019-11-22 | 2021-06-01 | 엘지전자 주식회사 | Display device using light emitting device and manufacturing method thereof |
| CN113809135B (en) * | 2021-09-13 | 2024-03-05 | 武汉天马微电子有限公司 | Display panel and display device |
| WO2023070524A1 (en) * | 2021-10-29 | 2023-05-04 | 京东方科技集团股份有限公司 | Pixel arrangement structure and driving method therefor, and display substrate and preparation method therefor |
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| CN102707487B (en) * | 2012-06-04 | 2014-11-19 | 青岛海信电器股份有限公司 | Transparent display device and electronic equipment employing same |
| KR20170047324A (en) * | 2014-08-26 | 2017-05-04 | 엑스-셀레프린트 리미티드 | Micro assembled hybrid displays and lighting elements |
| KR102525501B1 (en) * | 2016-05-23 | 2023-04-24 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN111653583A (en) * | 2016-06-14 | 2020-09-11 | 群创光电股份有限公司 | Display device |
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