WO2020119534A1

WO2020119534A1 - Display panel and display

Info

Publication number: WO2020119534A1
Application number: PCT/CN2019/122792
Authority: WO
Inventors: 刘振; 卓恩宗
Original assignee: 惠科股份有限公司
Priority date: 2018-12-12
Filing date: 2019-12-03
Publication date: 2020-06-18
Also published as: CN109616504A

Abstract

A display panel (100) and a display; the display panel (100) comprises a color film substrate (10), an array substrate (20) and a plurality of red light-emitting units (30), green light-emitting units (40) and blue light-emitting units (50) that are arranged in an array between the color film substrate (10) and the array substrate (20); the array substrate (20) is provided thereon with a plurality of thin-film transistor units (21) which arranged in an array and which are configured to drive the red light-emitting units (30), the green light-emitting units (40) and the blue light-emitting units (50) to emit light; and at least the blue light-emitting units (50) are quantum dot light-emitting units.

Description

Display panel and display The

Related application

This application requires the priority of the Chinese patent application with the application number 201811521562.5 and the name "display panel", which was applied on December 12, 2018. The entire content of which is hereby incorporated by reference.

Technical field

The present application relates to the field of display technology, in particular to a display panel and a display.

Background technique

OLED (Organic Light-Emitting Diode (Organic Light Emitting Diode) display panel, because blue light has a higher luminous frequency than red and green light, and blue photon energy is higher, resulting in the decay or aging of blue organic materials, shortening the life of OLED display panels. The statements here only provide background information related to the present application and do not necessarily constitute prior art.

Summary of the invention

The main purpose of the present application is to provide a display panel and a display, which improve the monochromatic purity of the display panel, widen the display color gamut of the display panel, increase the life of the display panel, and particularly greatly increase the service life of the small-size OLED display panel.

To achieve the above purpose, a display panel proposed by the present application, the display panel includes:

Color filter substrate, array substrate, and a plurality of red light emitting units, green light emitting units, and blue light emitting units arranged in an array between the color filter substrate and the array substrate, a plurality of arrays are provided on the array substrate The arranged arrangement is a thin film transistor unit that drives the red light emitting unit, the green light emitting unit, and the blue light emitting unit to emit light;

Wherein, at least the blue light emitting unit is a quantum dot light emitting unit.

Optionally, the quantum dots in the blue light-emitting unit are spherical semiconductor nanoparticles composed of II-VI or III-V group elements.

Optionally, both the red light-emitting unit and the green light-emitting unit are organic light-emitting units.

Optionally, at least one of the red light-emitting unit and the green light-emitting unit is a quantum dot light-emitting unit.

Optionally, the blue light emitting unit includes a blue cathode metal layer, a blue anode metal layer, and a quantum dot light emitting layer disposed between the blue cathode metal layer and the blue anode metal layer.

Optionally, an adjacent blue electron injection layer and a blue electron transmission layer are also provided between the blue cathode metal layer and the quantum dot light-emitting layer, wherein the blue electron injection layer and the blue cathode metal The layers are connected, and the blue electron transport layer is connected to the quantum dot light-emitting layer.

Optionally, an adjacent blue hole injection layer and a blue hole transport layer are also provided between the blue anode metal layer and the quantum dot light-emitting layer, wherein the blue hole injection layer and the blue hole injection layer The blue anode metal layer is connected, and the blue hole transport layer is connected to the quantum dot light emitting layer.

Optionally, the red light emitting unit includes a red cathode metal layer, a red anode metal layer, and a red organic light emitting layer disposed between the red cathode metal layer and the red anode metal layer.

Optionally, an adjacent red electron injection layer and a red electron transport layer are further provided between the red cathode metal layer and the red organic light-emitting layer, wherein the red electron injection layer and The red cathode metal layer is connected, and the red electron transport layer is connected to the red organic light emitting layer.

Optionally, a red light hole injection layer and a red light hole transport layer adjacent to each other are further provided between the red anode metal layer and the red light organic light emitting layer, wherein the red light hole The injection layer is in contact with the red anode metal layer, and the red hole transport layer is in contact with the red organic light-emitting layer.

Optionally, the green light-emitting unit includes a green cathode metal layer, a green anode metal layer, and a green organic light-emitting layer disposed between the green cathode metal layer and the green anode metal layer.

Optionally, an adjacent green light electron injection layer and a green light electron transport layer are further provided between the green cathode metal layer and the green light organic light emitting layer, wherein the green light electron injection layer and the green The photocathode metal layer is connected, and the green light electron-transporting layer is connected to the green light-emitting layer.

Optionally, an adjacent green light hole injection layer and a green light hole transport layer are further provided between the green anode metal layer and the green light organic light emitting layer, wherein the green light holes The injection layer is connected to the green light anode metal layer, and the green light hole transport layer is connected to the green light organic light-emitting layer.

Optionally, a light filter layer is further provided on the side of the red and green light emitting units facing the color film and color plate.

Optionally, a red color resist is provided on the red light emitting unit to form the filter layer, and a green color resist is provided on the green light emitting unit to form the filter layer.

In addition, the present application also provides a display panel. The display panel includes: a color filter substrate, an array substrate, and a plurality of red light emitting units and green arranged in an array arranged between the color filter substrate and the array substrate A light-emitting unit and a blue light-emitting unit, a plurality of thin-film transistor units arranged to drive the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit are arranged on the array substrate and arranged in an array; wherein at least the blue light-emitting unit As a quantum dot light emitting unit, the blue light emitting unit includes a blue cathode metal layer, a blue anode metal layer, and a quantum dot light emitting layer disposed between the blue cathode metal layer and the blue anode metal layer.

In addition, the present application also provides a display including a display panel, the display panel including a color filter substrate, an array substrate, and a plurality of arrays arranged between the color filter substrate and the array substrate A red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, a plurality of thin-film transistor units arranged in an array arranged on the array substrate and arranged to drive the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit to emit light; wherein, at least The blue light emitting unit is a quantum dot light emitting unit.

Red light emitting unit, green light emitting unit, blue light emitting unit, red light emitting unit, green light emitting unit, blue light emitting unit The blue light emitting unit of the present application is a quantum dot light emitting unit, a quantum dot (Quantum Dots (QDs) are usually spherical semiconductor nanoparticles composed of II-VI or III-V group elements, and the particle size is generally between a few nanometers and tens of nanometers. Due to the existence of quantum confinement effect, quantum dot materials have originally continuous energy bands changed into discrete energy level structures. When stimulated by light or electricity, quantum dots will emit colored light. The color of light is related to its nature. Therefore, The light emitted by it can be controlled by changing its size. The quantum dot light-emitting unit has the advantages of concentrated emission spectrum and high color purity, which can greatly improve the color gamut of the traditional display panel, so that the color reduction ability of the display panel is enhanced; at the same time, the quantum dot material in the quantum dot light-emitting unit is not like Organic electroluminescent materials have problems of aging or decay, thereby effectively improving the life span and stability of display panels, especially small-sized display panels.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments or exemplary technologies of the present application, the drawings required for the description of the embodiments or exemplary technologies will be briefly described below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained according to the structures shown in these drawings.

1 is a schematic structural diagram of an embodiment of a display panel of this application;

2 is a schematic structural diagram of a red light-emitting unit of this application;

3 is a schematic structural diagram of a green light-emitting unit of the present application;

4 is a schematic structural diagram of a blue light-emitting unit of this application;

5 is a schematic structural diagram of another embodiment of a display panel of the present application.

The implementation, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments and with reference to the drawings.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only set to explain the inter-components in a certain posture (as shown in the drawings) With respect to the relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication changes accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are only set for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary people in the art to achieve, when the combination of technical solutions conflicts with each other or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this application.

Please refer to FIG. 1, a display panel 100 proposed by the present application. The display panel 100 includes a color filter substrate 10, an array substrate 20, and a plurality of arrays disposed between the color filter substrate 10 and the array substrate 20 The red light emitting unit 30, the green light emitting unit 40, the blue light emitting unit 50, a plurality of arrays arranged on the array substrate 20 are arranged to drive the red light emitting unit 30, the green light emitting unit 40 and the blue light emitting unit 50 The thin-film transistor unit 21 that emits light, wherein at least the blue light-emitting unit 50 is a quantum dot light-emitting unit.

In this embodiment, the thin film transistor unit 21 corresponds to the red light emitting unit 30, the green light emitting unit 40, and the blue light emitting unit 50 one by one, and the red light emitting unit 30 and the green light emitting unit 40 are adjusted by the thin film transistor unit 21 , The light-emitting brightness of the blue light-emitting unit 50, the red light-emitting unit 30, the green light-emitting unit 40, the blue light-emitting unit 50 emit red light, green light and blue light, each group of red light-emitting unit, green light-emitting unit, blue light-emitting unit One pixel unit realizes the display of images by controlling each pixel unit to emit light of different colors and different brightness.

In this embodiment, it should be noted that the blue light-emitting unit 50 is a quantum dot light-emitting unit. The quantum dots are usually spherical semiconductor nanoparticles composed of II-VI or III-V group elements, and the particle size is generally several Between nanometers and tens of nanometers. Due to the existence of quantum confinement effect, the quantum dot material has a continuous continuous energy band into a discrete energy level structure. When stimulated by light or electricity, quantum dots will emit colored light. The color of the light is related to its nature, so it can be The blue light is produced by controlling the light emitted by changing its size. The quantum dot light-emitting unit has the advantages of concentrated emission spectrum and high color purity, which can greatly improve the color gamut of the conventional display panel 100 and enhance the color reduction ability of the display panel 100. At the same time, the quantum dot material in the quantum dot light emitting unit does not cause aging or decay problems like the blue organic electroluminescent material, thereby effectively improving the life span and stability of the display panel 100, especially the small-sized display panel 100.

Optionally, the red light emitting unit 30 and the green light emitting unit 40 are both organic light emitting units.

In this embodiment, since the red light-emitting unit 30 and the green light-emitting unit 40 are both organic light-emitting units, the red and green photon energy emitted by the organic electroluminescent material is not as high as the blue photon energy and does not exist. The problem of premature decay or aging, therefore, the red light emitting unit 30 and the green light emitting unit 40 may be organic light emitting units. It can be understood that the red light emitting unit 30 and/or the green light emitting unit 40 may also be quantum dot light emitting units.

Please refer to FIG. 2. Optionally, the red light emitting unit 30 includes a red cathode metal layer 31, a red anode metal layer 37 and a red cathode metal layer 31 and a red anode metal layer 37 disposed between Red light organic light-emitting layer 34. The

In this embodiment, electrons and holes are transferred from the red cathode metal layer 31 and the red anode metal layer 37 to the red organic light-emitting layer 34, and meet in the red organic light-emitting layer 34 to form excitons The luminescent molecules are excited, and the luminescent molecules emit visible red light after radiation relaxation.

Optionally, a red-electron injection layer 32 and a red-electron transport layer 33 are provided between the red cathode metal layer 31 and the red organic light-emitting layer 34, wherein the red light The electron injection layer 32 is in contact with the red cathode metal layer 31, and the red electron transport layer 33 is in contact with the red organic light emitting layer 34.

In this embodiment, the electrons in the red cathode metal layer 31 enter the red organic light-emitting layer 34 through the red electron injection layer 32 and the red electron transport layer 33 in sequence with the red light The holes in the organic light-emitting layer 34 meet and excite red light.

Optionally, a red light hole injection layer 36 and a red light hole transport layer 35 adjacent to each other are also provided between the red anode metal layer 37 and the red organic light emitting layer 34, wherein the The red hole injection layer 36 is connected to the red anode metal layer 37, and the red hole transport layer 35 is connected to the red organic light emitting layer 34.

In this embodiment, the holes in the red anode metal layer 37 enter the red organic light emitting layer 34 through the red hole injection layer 36 and the red hole transport layer 35 in sequence The electrons in the red organic light-emitting layer 34 meet and excite red light.

Please refer to FIG. 3. Optionally, the green light emitting unit 40 includes a green cathode metal layer 41, a green anode metal layer 47, and a green cathode metal layer 41 and a green anode metal layer 47 disposed between Green light organic light-emitting layer 44. The

In this embodiment, electrons and holes are transferred from the green cathode metal layer 41 and the green anode metal layer 47 to the green organic light-emitting layer 44 respectively, and meet in the green organic light-emitting layer 44 to form excitons The luminescent molecules are excited, and the luminescent molecules emit visible green light through radiation relaxation.

Optionally, an adjacent green light electron injection layer 42 and a green light electron transport layer 43 are further provided between the green cathode metal layer 41 and the green light organic light emitting layer 44, wherein the green light electron injection layer 42 is connected to the green cathode metal layer 41, and the green electron transport layer 43 is connected to the green organic light emitting layer 44.

In this embodiment, the electrons in the green cathode metal layer 41 enter the green light-emitting organic light-emitting layer 44 through the green light-electron injection layer 42 and the green light-electron-transporting layer 43 sequentially, and the green light organically emits light The holes in layer 44 meet and excite green light.

Optionally, an adjacent green light injection layer 46 and a green light hole transport layer 45 are further provided between the green anode metal layer 47 and the green organic light-emitting layer 44, wherein the The green light hole injection layer 46 is connected to the green light anode metal layer 47, and the green light hole transport layer 45 is connected to the green light organic light emitting layer 44.

In this embodiment, the holes in the green anode metal layer 47 enter the green organic light-emitting layer 44 through the green hole injection layer 46 and the green hole transport layer 45 in sequence The electrons in the green light-emitting layer 44 meet and excite green light.

Referring to FIG. 4, in one embodiment, the blue light emitting unit 50 includes a blue cathode metal layer 51, a blue anode metal layer 57 and quantum dots disposed between the blue cathode metal layer 51 and the blue anode metal layer 57 Emissive layer 54.

In this embodiment, the blue cathode metal layer 51 transports electrons to the quantum dot light emitting layer 54, the blue anode metal layer 57 transports holes to the quantum dot light emitting layer 54, the blue cathode metal layer 51 The current formed between the blue anode metal layer 57 passes through the quantum dot light-emitting layer 54 and the electrons in the quantum dot light-emitting layer 54 are excited from the excited state (Excited State) to return to the ground state by radiation State), and the quantum dot light-emitting layer 54 of the material is a direct energy gap semiconductor, this radiation will be presented in the form of light, and the quantum dot light-emitting layer 54 emits blue light.

In another embodiment, a blue electron injection layer 52 and a blue electron transport layer 53 are provided between the blue cathode metal layer 51 and the quantum dot light-emitting layer 54, wherein the blue electron injection layer 52 is connected to the blue cathode metal layer 51, and the blue electron transport layer 53 is connected to the quantum dot light emitting layer 54.

In this embodiment, the electrons in the blue cathode metal layer 51 sequentially pass through the blue electron injection layer 52 and the blue electron transport layer 53 to reach the quantum dot light emitting layer 54 so that the electrons are in the quantum dot light emitting layer 54 Return from the excited state to the ground state to achieve blue light emission.

Optionally, an adjacent blue hole injection layer 56 and a blue hole transport layer 55 are provided between the blue anode metal layer 57 and the quantum dot light-emitting layer 54, wherein the blue hole injection The layer 56 is connected to the blue anode metal layer 57, and the blue hole transport layer 55 is connected to the quantum dot light emitting layer 54.

In this embodiment, the holes in the blue anode metal layer 57 sequentially pass through the blue hole injection layer 56 and the blue hole transport layer 55 to the quantum dot light-emitting layer 54 so that the holes are in the The encounter of the electrons in the quantum dot light-emitting layer 54 returns the electrons from the excited state to the ground state to realize blue light emission.

Please refer to FIG. 5. Optionally, a filter layer 60 is further provided on the side of the red light-emitting unit 30 and the green light-emitting unit 40 facing the color film and color plate.

In this embodiment, when the red light emitting unit 30 and the green light emitting unit 40 are organic light emitting units, and the blue light emitting unit 50 is a quantum dot light emitting unit, the red light and green light emitted by the red light emitting unit 30 and the green light emitting unit 40 The half-width of the light spectrum is wider than that of the blue light emitted by the blue light-emitting unit 50. By providing the filter layer 60 in the red light-emitting unit 30 and the green light-emitting unit 40, the half of the light emission spectrum of the red light and the green light Peak width becomes smaller In order to further purify the colors of red light and green light, the color gamut of the entire display panel 100 is improved. Specifically, the filter layer 60 may be a color resist material corresponding to the red light emitting unit 30 and the green light emitting unit 40, that is, a red color resist forming filter layer 60 is provided on the red light emitting unit 30, and the green light emitting unit 40 The color filter layer 60 is formed with a green color resist.

The present application also provides a display including a display panel including a color filter substrate, an array substrate, and a plurality of red light arrays arranged between the color filter substrate and the array substrate Unit, green light-emitting unit and blue light-emitting unit, a plurality of thin-film transistor units arranged to drive the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit are arranged on the array substrate and arranged in an array; wherein at least the The blue light emitting unit is a quantum dot light emitting unit.

In this embodiment, the display panel further includes a driving circuit that drives the operation of the thin film transistor unit, the driver further includes components such as a middle frame and a rear case, and the display panel is formed on the middle frame and the rear case In the accommodation space.

The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by the description and drawings of the present application under the concept of the application of the present application, or direct/indirect Applications in other relevant technical fields are included in the scope of patent protection of this application.

Claims

A display panel, wherein the display panel includes:

Color filter substrate, array substrate, and a plurality of red light emitting units, green light emitting units, and blue light emitting units arranged in an array between the color filter substrate and the array substrate, a plurality of arrays are provided on the array substrate The arranged arrangement is a thin film transistor unit that drives the red light emitting unit, the green light emitting unit, and the blue light emitting unit to emit light;

Wherein, at least the blue light emitting unit is a quantum dot light emitting unit.
The display panel according to claim 1, wherein the quantum dots in the blue light-emitting unit are spherical semiconductor nanoparticles composed of group II-VI or III-V elements.
The display panel according to claim 1, wherein the red light emitting unit and the green light emitting unit are both organic light emitting units.
The display panel according to claim 3, wherein at least one of the red light-emitting unit and the green light-emitting unit is a quantum dot light-emitting unit.
The display panel according to claim 1, wherein the blue light emitting unit includes a blue cathode metal layer, a blue anode metal layer, and a quantum dot light emitting layer disposed between the blue cathode metal layer and the blue anode metal layer .
The display panel according to claim 5, wherein a blue electron injection layer and a blue electron transport layer are provided adjacent to each other between the blue cathode metal layer and the quantum dot light emitting layer, wherein the blue electrons The injection layer is connected to the blue cathode metal layer, and the blue electron transport layer is connected to the quantum dot light-emitting layer.
The display panel according to claim 5, wherein a blue hole injection layer and a blue hole transport layer are provided adjacent to each other between the blue anode metal layer and the quantum dot light emitting layer, wherein A blue hole injection layer is connected to the blue anode metal layer, and the blue hole transport layer is connected to the quantum dot light-emitting layer.
The display panel according to claim 3, wherein the red light-emitting unit includes a red cathode metal layer, a red anode metal layer, and a disposed between the red cathode metal layer and the red anode metal layer Red light emitting layer.
The display panel according to claim 8, wherein a red-electron injection layer and a red-electron transport layer are provided adjacent to each other between the red cathode metal layer and the red organic light-emitting layer, wherein, The red light electron injection layer is connected to the red light cathode metal layer, and the red light electron transport layer is connected to the red light emitting layer.
The display panel according to claim 9, wherein a red light hole injection layer and a red light hole transport layer are provided adjacently between the red anode metal layer and the red organic light emitting layer, Wherein, the red light hole injection layer is connected to the red light anode metal layer, and the red light hole transport layer is connected to the red light organic light emitting layer.
The display panel according to claim 3, wherein the green light emitting unit includes a green cathode metal layer, a green anode metal layer, and a green cathode metal layer disposed between the green cathode metal layer and the green anode metal layer Green light emitting layer.
The display panel according to claim 11, wherein an adjacent green light injection layer and a green light transmission layer are further provided between the green cathode metal layer and the green organic light-emitting layer, wherein A green light electron injection layer is connected to the green light cathode metal layer, and the green light electron transport layer is connected to the green light organic light emitting layer.
The display panel according to claim 12, wherein an adjacent green light injection layer and a green light hole transport layer are provided between the green anode metal layer and the green organic light-emitting layer, Wherein, the green light hole injection layer is connected with the green light anode metal layer, and the green light hole transport layer is connected with the green light organic light emitting layer.
The display panel according to claim 1, wherein a filter layer is further provided on a side of the red and green light emitting units facing the color film color plate.
The display panel according to claim 14, wherein a red color resist is provided on the red light emitting unit to form the filter layer, and a green color resist is provided on the green light emitting unit to form the filter layer.
A display panel, wherein the display panel includes:

Color film substrate, array substrate and a plurality of red light emitting units, green light emitting units and blue light emitting units arranged in an array between the color film substrate and the array substrate, a plurality of arrays are provided on the array substrate The arranged arrangement is a thin film transistor unit that drives the red light emitting unit, the green light emitting unit, and the blue light emitting unit to emit light;

Wherein, at least the blue light emitting unit is a quantum dot light emitting unit, and the blue light emitting unit includes a blue cathode metal layer, a blue anode metal layer, and quantum dots disposed between the blue cathode metal layer and the blue anode metal layer Emissive layer.
The display panel according to claim 16, wherein the quantum dots in the blue light-emitting unit are spherical semiconductor nanoparticles composed of group II-VI or group III-V elements.
The display panel according to claim 16, wherein a blue electron injection layer and a blue electron transport layer are provided adjacent to each other between the blue cathode metal layer and the quantum dot light emitting layer, wherein the blue electrons The injection layer is connected to the blue cathode metal layer, and the blue electron transport layer is connected to the quantum dot light-emitting layer.
The display panel according to claim 18, wherein a blue hole injection layer and a blue hole transport layer are provided adjacent to each other between the blue anode metal layer and the quantum dot light-emitting layer, wherein the A blue hole injection layer is connected to the blue anode metal layer, and the blue hole transport layer is connected to the quantum dot light emitting layer.
A display, wherein the display includes a display panel, the display panel includes a color filter substrate, an array substrate, and a plurality of red light emitting units arranged in an array arranged between the color filter substrate and the array substrate, A green light-emitting unit and a blue light-emitting unit, a plurality of thin-film transistor units arranged to drive the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit in an array arrangement on the array substrate are arranged; wherein at least the blue light-emitting unit The unit is a quantum dot light emitting unit. The