CN111341928A - Light emitting unit, display panel and display device - Google Patents
Light emitting unit, display panel and display device Download PDFInfo
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- CN111341928A CN111341928A CN201811449991.6A CN201811449991A CN111341928A CN 111341928 A CN111341928 A CN 111341928A CN 201811449991 A CN201811449991 A CN 201811449991A CN 111341928 A CN111341928 A CN 111341928A
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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
- H10K59/90—Assemblies of multiple devices comprising at least one organic light-emitting element
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K50/85—Arrangements for extracting light from the devices
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- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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- 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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- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The invention provides a light-emitting unit, a display panel and a display device. The quantum layer comprises a quantum material, the quantum material is used for emitting fluorescence under the excitation of blue light emitted by the blue light pixel layer, the surface of one side, facing the second electrode layer, of the enhanced reflecting layer is a plane, and the surface of one side, facing the quantum layer, of the enhanced reflecting layer is provided with a first pattern. The invention can increase the light-emitting intensity of the display panel and the display device, reduce the crosstalk between lights with different colors and improve the luminous performance.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light-emitting unit, a display panel and a display device.
Background
An Organic Light Emitting Diode (OLED) display device has the advantages of self-luminescence, low driving voltage, lightness, thinness, fast response speed and high contrast, and is widely applied in the display field.
At present, in order to improve the luminous efficiency of the OLED display device, quantum dots are generally added in the structure of the OLED display device, and the quantum dots are made of a semiconductor crystal-based nanocrystalline material and have an outstanding quantum size effect. The quantum dots are generally arranged in the light emitting path of the OLED pixel layer or are tiled in the OLED display device, when light irradiates on the surface of the quantum dots, the quantum dots can emit fluorescence after being excited to form high-purity monochromatic light, and the change of the excitation spectrum of the quantum dots can be realized by changing the size of the quantum material, so that the purpose of improving the luminous efficiency of the OLED by using the quantum material is realized.
However, the current quantum dot arrangement mode cannot ensure that all the fluorescence emitted after the quantum dots are excited is emitted from the light emitting side of the OLED display device, resulting in low light emitting intensity, and therefore, the light emitting performance of the display device is also affected.
Disclosure of Invention
In order to solve at least one of the problems mentioned in the background art, the present invention provides a light emitting unit, a display panel, and a display device, which can increase light intensity, improve light emitting performance, and reduce crosstalk between lights of different colors.
In order to achieve the above object, in a first aspect, the present invention provides a light emitting unit including a first electrode layer, a blue pixel layer, and a second electrode layer, an enhanced reflection layer, a quantum layer, and a filter layer, which are sequentially stacked.
The quantum layer comprises a quantum material, the quantum material is used for emitting fluorescence under the excitation of blue light emitted by the blue light pixel layer, the surface of one side, facing the second electrode layer, of the enhanced reflecting layer is a plane, and the surface of one side, facing the quantum layer, of the enhanced reflecting layer is provided with a first pattern.
According to the light-emitting unit provided by the invention, the enhanced reflecting layer is arranged, the surface of the enhanced reflecting layer facing to one side of the quantum layer is provided with the first pattern, the surface of the enhanced reflecting layer facing to one side of the second electrode layer is provided with the plane, and the blue light entering the enhanced reflecting layer from one side of the second electrode layer can be uniformly dispersed in the quantum layer, so that the light-emitting effect of the quantum material in the blue light excited quantum layer is improved, and the light-emitting performance is improved. And the first pattern ensures that the exciting light of the quantum material can be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity is improved. By arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
In the above light-emitting unit, optionally, a surface of the quantum layer on the side facing the enhanced reflection layer has a second pattern, and the first pattern and the second pattern are fitted to each other.
By providing the surface of the quantum layer on the side facing the enhanced reflection layer with the second pattern that fits the first pattern, the surface of the quantum layer can be made to conform to the first pattern of the enhanced reflection layer, the bonding strength between the surfaces that are in contact with each other can be improved, and the light-emitting performance of the light-emitting unit can be improved.
In the light emitting unit, optionally, the first pattern includes a plurality of first grooves arranged in an array, the second pattern includes a plurality of second protrusions arranged in an array, and the plurality of first grooves and the plurality of second protrusions are correspondingly embedded one to one;
or the first pattern comprises a plurality of first bulges arranged in an array, the second pattern comprises a plurality of second grooves arranged in an array, and the plurality of first bulges and the plurality of second grooves are embedded in a one-to-one corresponding mode.
In the light emitting unit, optionally, the first pattern includes a plurality of first protrusions and a plurality of first grooves arranged in an array, and the first protrusions and the first grooves are alternately arranged at intervals;
the second pattern comprises a plurality of second bulges and a plurality of second grooves which are arranged in an array, and the second bulges and the second grooves are alternately arranged at intervals;
the first bulges and the second grooves are correspondingly embedded one by one, and the first grooves and the second bulges are correspondingly embedded one by one.
The first pattern is set as the first protrusion and/or the first groove, and the second pattern is set as the second groove and/or the second protrusion, so that the first protrusion is embedded with the second groove, and the second protrusion is embedded with the first groove, and the connection strength of the quantum layer and the enhanced reflection layer is improved.
In the light emitting unit, the quantum layer may include a red quantum material, a green quantum material, and an encapsulant, and the quantum material is uniformly dispersed in the encapsulant.
By uniformly dispersing the red quantum material and the green quantum material in the quantum layer in the packaging adhesive, the blue light pixel layer can be ensured to be excited to form uniform red fluorescence and green fluorescence when irradiating the quantum layer, and the blue light which is not contacted with the quantum material is mixed with the red fluorescence and the green fluorescence to form stable white light, so that the luminous performance of the luminous unit is improved.
In the above light emitting unit, the quantum layer may optionally include quantum dots, quantum rods, and/or quantum plates.
In the above light emitting unit, the reflection enhancing layer may optionally include a composite layer of one or more of a silicon oxide layer, an aluminum oxide layer, a silicon nitride layer, a silicon carbide layer, or a silicon carbonitride layer.
In the above light emitting unit, optionally, the quantum layer has a thickness in the range of
In a second aspect, the present invention provides a display panel, which includes a plurality of the above light emitting units, wherein the plurality of light emitting units are arranged in an array.
According to the display panel provided by the invention, the enhanced reflection layer is arranged in the light emitting unit, the surface of the side, facing the quantum layer, of the enhanced reflection layer is limited to be provided with the first pattern, and the surface of the side, facing the second electrode layer, of the enhanced reflection layer is limited to be provided with the plane, so that blue light entering the enhanced reflection layer from the side of the second electrode layer can be uniformly dispersed in the quantum layer, the light emitting effect of quantum materials in the blue light excitation quantum layer is improved, and the light emitting performance of the display panel is improved. And the first pattern can enable the excitation light of the quantum material to be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity of the display panel is improved. And by arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
In a third aspect, the present invention provides a display device, including the display panel.
According to the display device provided by the invention, the enhanced reflection layer is arranged in the display panel of the display device, the surface of the side, facing the quantum layer, of the enhanced reflection layer is limited to be provided with the first pattern, and the surface of the side, facing the second electrode layer, of the enhanced reflection layer is limited to be provided with the plane, so that blue light entering the enhanced reflection layer from the side of the second electrode layer can be uniformly dispersed in the quantum layer, the quantum material light-emitting effect in the quantum layer excited by the blue light is improved, and the light-emitting performance of the display device is improved. And the first pattern can enable the excitation light of the quantum material to be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity of the display device is improved. And through set up the filter layer in the light-emitting direction of luminescence unit, can reduce the crosstalk between the different colour lights, improve the definition of display device display image.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light emitting unit according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a quantum layer of a light-emitting unit according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a quantum layer of a light-emitting unit according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a quantum layer of a light-emitting unit according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display panel according to a fourth embodiment of the present invention;
fig. 9 is a top view of a light emitting unit of a display panel according to a fourth embodiment of the present invention.
Description of reference numerals:
100-a light-emitting unit;
10-a first electrode layer;
20-blue pixel layer;
30 — a second electrode layer;
40-enhanced reflection layer;
41 — a first projection;
42 — a first groove;
50-quantum layers;
51 — a second projection;
52 — a second groove;
53-red quantum materials;
54-green quantum material;
60-a filter layer;
70, 204-encapsulation layer;
200-a display panel;
201-a substrate;
202-thin film transistor layer;
203-pixel definition layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the embodiments of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
Fig. 1 is a schematic structural diagram of a light emitting unit according to a first embodiment of the present invention. Fig. 2 is a schematic structural diagram of a quantum layer of a light-emitting unit according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to an embodiment of the invention.
In the course of practical research, the inventor of the present invention found that, in the current display device, quantum dots are generally added to the display device in order to improve the display brightness, and based on the quantum size effect of the quantum dots, the light-emitting brightness of the display device can be greatly improved. However, because the quantum dots have small sizes, when light in the display device irradiates on the surface of the display device, the emission directions of fluorescence generated by the quantum dots under excitation face all directions, not all the directions face one side of the light emitting surface of the display device, and thus the light emitting intensity of the display device is low. And the quantum dots based on different colors can be excited to form fluorescence of different colors, and when the fluorescence of different colors coexists in the same display device, the problem of light color crosstalk is easy to occur, so that the luminous performance of the display device and the definition of a displayed image are reduced.
Based on the above findings and the existing technical problems, the embodiments of the present invention provide the following solutions: referring to fig. 1 to 3, an embodiment of the invention provides a light emitting unit 100, which includes a first electrode layer 10, a blue pixel layer 20, a second electrode layer 30, an enhanced reflection layer 40, a quantum layer 50, and a filter layer 60, which are sequentially stacked.
The quantum layer 50 includes a quantum material for emitting fluorescence under excitation of blue light emitted from the blue pixel layer 20, a surface of the enhanced reflection layer 40 on a side facing the second electrode layer 30 is a plane, and a surface of the enhanced reflection layer 40 on a side facing the quantum layer 50 has a first pattern.
It should be noted that the light emitting unit 100 provided in this embodiment includes a first electrode layer 10, a blue light pixel layer 20, and a second electrode layer 30, which are stacked, where the blue light pixel layer 20 includes a plurality of blue OLEDs arranged in an array, and the blue OLEDs emit blue light under the action of electric fields of the first electrode layer 10 and the second electrode layer 30, and a light emitting direction of the blue light may face one side of the enhanced reflection layer 40. Since blue light has a high intensity and a short wavelength, when passing through the quantum layer 50, the blue light may be converted into light of other colors having lower energy.
The first electrode layer 10 may be one of a cathode layer and an anode layer, and the second electrode layer 30 may be the other of the cathode layer and the anode layer, which is not limited in this embodiment.
Referring to fig. 1 and 3, the enhanced reflective layer 40 and the quantum layer 50 are stacked on the second electrode layer 30, and the surface of the enhanced reflective layer 40 facing the second electrode layer 30 is a flat surface that is in close contact with the surface of the second electrode layer 30. The surface of the enhanced reflection layer 40 facing the quantum layer 50 has a first pattern, and the quantum layer 50 covers the surface of the first pattern. Further, a filter layer 60 and an encapsulation layer 70 are disposed on the surface of the quantum layer 50 on the side away from the enhanced reflection layer 40.
In operation of the light emitting unit 100, blue light emitted from the blue pixel layer 20 first enters the enhanced reflection layer 40 through the surface of the enhanced reflection layer 40 on the side close to the second electrode layer 30, and enters the quantum layer 50 through the surface of the enhanced reflection layer 40 on the side provided with the first pattern. When blue light passes through the enhanced reflection layer 40, the incident surface of the blue light is the surface of the enhanced reflection layer 40 on the side close to the second electrode layer 30, and the exit surface of the blue light is the surface of the enhanced reflection layer 40 on the side close to the quantum layer 50. Since the surface of the enhanced reflection layer 40 on the side close to the quantum layer 50 has the first pattern, when the blue light passes through and is refracted between the enhanced reflection layer 40 and the quantum layer 50, the refraction surface thereof is not a standard plane but has an interface of the first pattern. When the blue light is refracted at the interface of the first pattern, the blue light at different positions has different incident angles on the first pattern, and thus the blue light enters the quantum layer 50 with different refraction angles, so that the blue light enters the quantum layer 50 in a divergent state and contacts the quantum material in the quantum layer 50. The blue light is in a divergent state, so that the contact uniformity of the blue light and the quantum material can be improved, and the quantum material can be excited to generate fluorescence as much as possible.
It should be noted that, the fluorescence formed after excitation is emitted in different directions in the quantum layer 50, and one of the fluorescence is emitted along the light-emitting direction of the light-emitting unit 100, and the part of the light can smoothly enter the filter layer 60 through the light-emitting surface; and the other part is emitted towards the surface side of the first pattern, and the part of light contacts the first pattern. Based on the fact that the quantum layer 50 and the enhanced reflection layer 40 have different densities and a total reflection angle exists between the quantum layer 50 and the enhanced reflection layer 40, when the first pattern is arranged on the surface of the enhanced reflection layer 40, the total reflection angle of the first pattern is reduced by the first pattern, so that the fluorescence emitted by the quantum layer 50 is guaranteed to be totally reflected when contacting the surface of the first pattern and finally emitted from the side of the light emitting surface departing from the surface of the first pattern, the excited fluorescence is guaranteed to be emitted from the light emitting surface mostly, and the light emitting intensity of the light emitting unit 100 is improved.
Further, when the excited fluorescence enters the filter layer 60, the fluorescence is filtered to have the color of the filter layer 60, so that colored light is formed. The filter layer 60 may include a red filter unit, a green filter unit, a blue filter unit, and the like, and the color of the filter unit may be set according to the requirement in practical use, which is not set in this embodiment. The quantum layer 50 has a quantum material, and the quantum material can be uniformly distributed in the quantum layer 50, and the quantum material can form fluorescence with the same color as the quantum material under the laser of blue light. In this embodiment, the filter layer 60 is arranged, and the positions of the filters with different colors in the filter layer 60 are adjusted, so that crosstalk between lights with different colors can be effectively reduced, and the performance of the light emitting unit 100 for emitting light can be ensured.
As an alternative embodiment, the enhanced reflection layer 40 may be made of an inorganic material, and since the inorganic material is mostly a crystalline material and has a more regular crystal arrangement state, when light irradiates on the surface of the inorganic material, a more uniform refraction or reflection effect is formed. The enhanced reflection layer 40 may include a composite layer of one or more of a silicon oxide layer, an aluminum oxide layer, a silicon nitride layer, a silicon carbide layer, or a silicon carbonitride layer, and in an actual manufacturing process, the material of the enhanced reflection layer 40 may be set according to requirements, which is not limited by the embodiment and is not limited by the above examples.
As an alternative embodiment, the quantum material in the quantum layer 50 may include quantum dots, quantum rods, and/or quantum plates.
Further, the surface of the quantum layer 50 on the side facing the enhanced reflection layer 40 has a second pattern, and the first pattern and the second pattern are fitted to each other.
As shown in fig. 2 and 3, the quantum layer 50 has a second pattern that fits the first pattern toward the enhanced reflective layer 40, and the first pattern and the second pattern are in a fitting relationship, and therefore the coupling therebetween is not as planar as between the enhanced reflective layer 40 and the second electrode layer 30. Since the enhanced reflective layer 40 is generally made of an inorganic material and the quantum layer 50 is made of an organic material, if the two layers are simply connected in a planar manner, the display unit is likely to be broken or cracked during a long-term use. The contact area of the first pattern and the second pattern after being embedded is increased, and the contact surface of the first pattern and the second pattern has a clamping relation, so that the bonding strength of the enhanced reflection layer 40 and the quantum layer 50 can be greatly improved, the problem of fracture or cracking of the contact position of the first pattern and the second pattern is effectively relieved, the normal work of the display unit can be ensured, the luminous performance of the display unit is improved, and the service life of the display unit is prolonged.
As an alternative embodiment, the first pattern includes a plurality of first grooves 42 arranged in an array, the second pattern includes a plurality of second protrusions 51 arranged in an array, and the plurality of first grooves 42 and the plurality of second protrusions 51 are correspondingly engaged with each other.
Referring to fig. 2 and 3, the first pattern provided in this embodiment may be a plurality of first grooves 42 arranged in an array, and the second pattern may be a plurality of second protrusions 51 arranged in an array. Wherein the first groove 42 may be a tapered groove (shown in fig. 2), a circular groove, a square groove, a trapezoidal groove or an irregularly shaped groove body, and in order to ensure the tight fitting relationship between the first groove 42 and the second protrusion 51, the second protrusion 51 may be a tapered protrusion (shown in fig. 3), a circular protrusion, a square protrusion, a trapezoidal protrusion or an irregularly shaped protrusion corresponding to the shape of the first groove 42. In the actual manufacturing process, the shapes of the first groove 42 and the second protrusion 51 can be set according to the requirement, and the embodiment does not limit the shape, and is not limited to the above example.
As an alternative embodiment, the quantum layer 50 includes a red quantum material 53, a green quantum material 54, and an encapsulant, in which the quantum material is uniformly dispersed.
It should be noted that the three colors, which are the most basic ones of the colored lights, are based on blue, green and red, and different colored lights can be formed by their harmony with each other. Therefore, the present embodiment sets the quantum material of the quantum layer 50 to red and green, and red fluorescence and green fluorescence are formed after excitation by blue light, while the blue light not in contact with the quantum material passes through the quantum layer 50 directly, thereby remaining blue. The blue light, the red light and the green light simultaneously emitted by the quantum layer 50 are mixed to form white light with a more standard color tone, and such an arrangement can also improve the performance of the light emitted by the light emitting unit 100.
As an alternative embodiment, the quantum layer 50 may have a thickness in the range of
The thickness of the quantum layer 50 may be set as needed, and the present embodiment is not limited to this, nor to the above example.
Further, in order to ensure the light emitting performance of the light emitting unit 100, the light emitting unit 100 may further include an electron transport layer, a hole transport layer, an electron injection layer, a hole injection layer, and the like, and the specific arrangement manner thereof may refer to the existing OLED display device, which is not described herein again.
In the light emitting unit provided by the first embodiment of the present invention, the enhanced reflective layer is disposed, the surface of the enhanced reflective layer facing the quantum layer is disposed to have the first pattern, and the surface of the enhanced reflective layer facing the second electrode layer is disposed to be a plane, so that blue light entering the enhanced reflective layer from the second electrode layer side can be uniformly dispersed in the quantum layer, and the light emitting effect of the quantum material in the blue light excited quantum layer can be improved, thereby improving the light emitting performance. And the first pattern ensures that the exciting light of the quantum material can be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity is improved. By arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
Example two
Fig. 4 is a schematic structural diagram of a quantum layer of a light-emitting unit according to a second embodiment of the present invention. Fig. 5 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to a second embodiment of the present invention.
Referring to fig. 4 and 5, on the basis of the first embodiment, a light emitting unit 100 with another structure is further provided in the second embodiment of the present invention, and compared with the first embodiment, the difference between the first embodiment and the second embodiment is: the first pattern and the second pattern have different structures.
Specifically, the first pattern includes a plurality of first protrusions 41 arranged in an array, the second pattern includes a plurality of second recesses 52 arranged in an array, and the plurality of first protrusions 41 and the plurality of second recesses 52 are correspondingly engaged with each other one by one. The shapes of the first protrusion 41 and the second groove 52 can refer to the shapes of the second protrusion 51 and the first groove 42 in the first embodiment, and the description thereof is omitted in this embodiment. Through setting up first pattern into being a plurality of first archs 41 that the array was arranged, set up the second pattern into being a plurality of second recesses 52 that the array was arranged, utilize first protruding 41 and second recess 52 gomphosis equally can improve the bonding strength of reinforcing reflection stratum 40 and quantum layer 50, effectively alleviate the fracture or the problem of fracture of both contacts department to can guarantee this display element normal work, improve its luminous performance and life.
Other technical features are the same as those of the first embodiment and can achieve the same technical effects, and are not described in detail herein.
In the light emitting unit provided by the second embodiment of the present invention, the enhanced reflective layer is disposed, the surface of the enhanced reflective layer facing the quantum layer is disposed to have the first pattern, and the surface of the enhanced reflective layer facing the second electrode layer is disposed to be a plane, so that blue light entering the enhanced reflective layer from the second electrode layer side can be uniformly dispersed in the quantum layer, and the light emitting effect of the quantum material in the blue light excited quantum layer can be improved, thereby improving the light emitting performance. And the first pattern ensures that the exciting light of the quantum material can be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity is improved. By arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
EXAMPLE III
Fig. 6 is a schematic structural diagram of a quantum layer of a light-emitting unit according to a third embodiment of the present invention. Fig. 7 is a schematic structural diagram of an enhanced reflection layer of a light emitting unit according to a third embodiment of the present invention.
Referring to fig. 6 and 7, on the basis of the first and second embodiments, a light emitting unit 100 with another structure is further provided in the third embodiment of the present invention, and the difference between the third embodiment and the first and second embodiments is: the first pattern and the second pattern have different structures.
Specifically, the first pattern includes a plurality of first protrusions 41 and a plurality of first grooves 42 arranged in an array, and the first protrusions 41 and the first grooves 42 are alternately arranged at intervals. The second pattern includes a plurality of second protrusions 51 and a plurality of second recesses 52 arranged in an array, and the second protrusions 51 and the second recesses 52 are alternately arranged at intervals. The plurality of first projections 41 and the plurality of second recesses 52 are fitted in one-to-one correspondence, and the plurality of first recesses 42 and the plurality of second projections 51 are fitted in one-to-one correspondence.
It should be noted that the shapes of the first protrusion 41, the first groove 42, the second protrusion 51, and the second groove 52 may refer to those described in the first embodiment and the second embodiment, and are not described again in this embodiment. The first pattern is provided with a plurality of first protrusions 41 and a plurality of first grooves 42 which are alternately spaced, and the second pattern is provided with a plurality of second protrusions 51 and a plurality of second grooves 52 which are alternately spaced, so that the bonding strength of the enhanced reflection layer 40 and the quantum layer 50 can be improved, the problem of fracture or cracking at the contact part of the enhanced reflection layer and the quantum layer can be effectively relieved, the normal work of the display unit can be ensured, and the luminous performance and the service life of the display unit can be improved.
Other technical features are the same as those of the first embodiment and the second embodiment, and the same technical effects can be achieved, and are not described in detail herein.
In the light emitting unit provided by the third embodiment of the present invention, the enhanced reflective layer is disposed, the surface of the enhanced reflective layer facing the quantum layer is disposed to have the first pattern, and the surface of the enhanced reflective layer facing the second electrode layer is disposed to be a plane, so that blue light entering the enhanced reflective layer from the second electrode layer side can be uniformly dispersed in the quantum layer, and the light emitting effect of the quantum material in the blue light excited quantum layer can be improved, thereby improving the light emitting performance. And the first pattern ensures that the exciting light of the quantum material can be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity is improved. By arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
Example four
Fig. 8 is a schematic structural diagram of a display panel according to a fourth embodiment of the present invention. Fig. 9 is a top view of a light emitting unit of a display panel according to a fourth embodiment of the present invention. On the basis of the first embodiment, the second embodiment and the third embodiment, a fourth embodiment of the present invention provides a display panel.
Specifically, the display panel 200 includes a plurality of the light emitting units 100, and the light emitting units 100 are tiled along an array.
Referring to fig. 8 and 9, the display panel 200 provided in this embodiment may further include a substrate 201, a thin-film transistor layer 202, a pixel defining layer 203, and an encapsulation layer 204, which are stacked. Pixel defining layers 203 are disposed on thin-film transistor layer 202 at intervals, and pixel defining regions, in which light emitting units 100 are located, are formed between adjacent pixel defining layers 203. When the display panel 200 is in operation, the plurality of thin film transistors on the thin film transistor layer 202 control the plurality of light emitting units 100 to emit light in a one-to-one correspondence manner. In practical use, the arrangement manner of the light emitting units 100 on the display panel 200 can be set according to needs, and the embodiment is not limited to this, and is not limited to the illustration in the drawings.
Other technical features are the same as those of the first embodiment, the second embodiment and the third embodiment, and the same technical effects can be achieved, and are not described in detail herein.
According to the display panel provided by the embodiment of the invention, the enhanced reflection layer is arranged in the light emitting unit, the surface of the side, facing the quantum layer, of the enhanced reflection layer is limited to be provided with the first pattern, and the surface of the side, facing the second electrode layer, of the enhanced reflection layer is limited to be provided with the plane, so that blue light entering the enhanced reflection layer from the side of the second electrode layer can be uniformly dispersed in the quantum layer, the light emitting effect of quantum materials in the blue light excitation quantum layer is improved, and the light emitting performance of the display panel is improved. And the first pattern can enable the excitation light of the quantum material to be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity of the display panel is improved. And by arranging the filter layer in the light exit direction of the light emitting unit, crosstalk between different colors of light can be reduced.
EXAMPLE five
On the basis of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, a fifth embodiment of the present invention provides a display device, which includes the display panel 200. The display device provided in this embodiment may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a tablet computer, a smart watch, an electronic book, and a navigator, which includes the display panel 200.
Other technical features are the same as those of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, and the same technical effects can be achieved, and are not described in detail herein.
According to the display device provided by the embodiment of the invention, the enhanced reflection layer is arranged in the display panel of the display device, the surface of the enhanced reflection layer facing to the quantum layer is defined to be provided with the first pattern, and the surface of the enhanced reflection layer facing to the second electrode layer is defined to be a plane, so that blue light entering the enhanced reflection layer from the second electrode layer side can be uniformly dispersed in the quantum layer, the quantum material light-emitting effect in the blue light excitation quantum layer is improved, and the light-emitting performance of the display device is improved. And the first pattern can enable the excitation light of the quantum material to be emitted from the light emitting surface of the light emitting unit, so that the light emitting intensity of the display device is improved. And through set up the filter layer in the light-emitting direction of luminescence unit, can reduce the crosstalk between the different colour lights, improve the definition of display device display image.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A light-emitting unit is characterized by comprising a first electrode layer, a blue light pixel layer, a second electrode layer, an enhanced reflection layer, a quantum layer and a filter layer which are sequentially stacked;
the quantum layer comprises a quantum material, the quantum material is used for emitting fluorescence under the excitation of blue light emitted by the blue light pixel layer, the surface of the enhanced reflection layer facing one side of the second electrode layer is a plane, and the surface of the enhanced reflection layer facing one side of the quantum layer is provided with a first pattern.
2. The light-emitting unit according to claim 1, wherein a surface of the quantum layer on a side facing the enhanced reflection layer has a second pattern, and the first pattern and the second pattern are fitted to each other.
3. The light-emitting unit according to claim 2, wherein the first pattern comprises a plurality of first grooves arranged in an array, the second pattern comprises a plurality of second protrusions arranged in an array, and the plurality of first grooves and the plurality of second protrusions are correspondingly embedded in a one-to-one manner;
or, the first pattern comprises a plurality of first bulges arranged in an array, the second pattern comprises a plurality of second grooves arranged in an array, and the first bulges and the second grooves are correspondingly embedded one to one.
4. The light-emitting unit according to claim 2, wherein the first pattern comprises a plurality of first protrusions and a plurality of first grooves arranged in an array, and the first protrusions and the first grooves are alternately arranged at intervals;
the second pattern comprises a plurality of second bulges and a plurality of second grooves which are arranged in an array, and the second bulges and the second grooves are alternately arranged at intervals;
the first bulges are correspondingly embedded with the second grooves one by one, and the first grooves are correspondingly embedded with the second bulges one by one.
5. A light-emitting unit according to any of claims 1-4, characterized in that the quantum layer comprises the quantum material in red, the quantum material in green and an encapsulating glue, the quantum material being homogeneously dispersed in the encapsulating glue.
6. A light-emitting unit according to claim 5, characterized in that the quantum layer comprises quantum dots, quantum rods and/or quantum plates.
7. The light-emitting unit according to any one of claims 1-4, wherein the enhanced reflection layer comprises a composite layer of one or more of a silicon oxide layer, an aluminum oxide layer, a silicon nitride layer, a silicon carbide layer, or a silicon carbonitride layer.
8. A light-emitting unit according to any of claims 1-4, characterized in that the quantum layer has a thickness in the range of
9. A display panel comprising a plurality of the light-emitting units according to any one of claims 1 to 8, the plurality of light-emitting units being arranged in an array.
10. A display device characterized by comprising the display panel according to claim 9.
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| CN201811449991.6A CN111341928A (en) | 2018-11-30 | 2018-11-30 | Light emitting unit, display panel and display device |
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| CN201811449991.6A CN111341928A (en) | 2018-11-30 | 2018-11-30 | Light emitting unit, display panel and display device |
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