CN109445174B - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- CN109445174B CN109445174B CN201910002905.5A CN201910002905A CN109445174B CN 109445174 B CN109445174 B CN 109445174B CN 201910002905 A CN201910002905 A CN 201910002905A CN 109445174 B CN109445174 B CN 109445174B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to the technical field of display, and discloses a display panel, a preparation method thereof and a display device. The display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the object substrate; one side of the array substrate, which is far away from the opposite substrate, is provided with a first polarization structure, and one side of the first polarization structure is a display surface; the counter substrate includes: the liquid crystal display panel comprises a substrate, a second polarizing film positioned on one side of the substrate facing the liquid crystal layer, and a color resistance structure positioned on one side of the substrate departing from the liquid crystal layer, wherein the color resistance structure comprises a plurality of quantum dot units corresponding to sub-pixel units. The display panel has high light-emitting efficiency and high display yield.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device.
Background
The Quantum Dot (QD) display technology is a feasible novel display technology, and the current quantum dot display technical scheme is that the quantum dots are used as color resistance structures of sub-pixels, and the display control is realized through the matching of liquid crystal and a polaroid; however, the quantum dot display technology has some technical problems, for example, because the preparation process of the polarizer has high requirements on the bearing surface, the addition of the quantum dot structure easily causes poor preparation of the polarizer, and further causes poor display.
Disclosure of Invention
The invention discloses a display panel, a preparation method thereof and a display device, and aims to improve the yield of a quantum dot display panel.
In order to achieve the purpose, the invention provides the following technical scheme:
a display panel comprises an array substrate and an opposite substrate which are oppositely arranged, and a liquid crystal layer positioned between the array substrate and an object substrate; wherein:
one side of the array substrate, which is far away from the opposite substrate, is provided with a first polarization structure, and one side of the first polarization structure is a display surface;
the counter substrate includes: the liquid crystal display panel comprises a substrate, a second polarizing film positioned on one side of the substrate facing the liquid crystal layer, and a color resistance structure positioned on one side of the substrate departing from the liquid crystal layer, wherein the color resistance structure comprises a plurality of quantum dot units corresponding to sub-pixel units.
The display panel takes the quantum dot units as the color resistance structures and takes the liquid crystal layer, the first polarizing structure and the second polarizing film as the control switches, so that the display of each sub-pixel is realized. In addition, in the display panel, the quantum dot unit is arranged on one side, away from the liquid crystal layer, of the substrate of the opposite substrate, and the second polarizing film is arranged on one side, facing the liquid crystal layer, of the substrate; in addition, the quantum dot unit is positioned on one side adjacent to the backlight source and is close to the backlight source, so that the excitation efficiency is high, and the display brightness and the contrast can be improved; the second polarizing film is close to one side of the liquid crystal layer and is less affected before entering the liquid crystal layer, so that the display yield can be further ensured. In summary, the display panel has high light-emitting efficiency and high display yield.
Optionally, the substrate is a flexible substrate; the counter substrate further includes: the hard substrate is positioned on one side, away from the liquid crystal layer, of the substrate; the hard substrate is provided with through grooves corresponding to the quantum dot units one by one; each quantum dot unit is positioned in the corresponding through groove.
Optionally, the hard substrate is made of glass and has a thickness of 0.1-0.5 mm; the substrate is made of polyimide, and the thickness of the substrate is smaller than 10 um.
Optionally, the opposite substrate further includes: the packaging layer is positioned on one side, away from the substrate, of the quantum dot unit; the encapsulation layer is configured to seal the quantum dot units within corresponding grooves.
Optionally, the opposite substrate further includes: the light extraction layer is positioned in the groove and positioned on one side, facing the substrate, of the quantum dot unit; the light extraction layer comprises at least two structural layers, and the refractive index of the structural layer close to the substrate is larger than that of the structural layer close to the quantum dot unit.
Optionally, the display panel further includes a backlight source located on a side of the opposite substrate away from the array substrate, and the backlight source includes a light guide plate and a first reflection structure located on a side of the light guide plate away from the opposite substrate.
Optionally, the opposite substrate further includes: and the projection of the second reflecting structure on the substrate is positioned in the projection of the hard base on the substrate.
Optionally, a cross section of the second reflective structure along a direction perpendicular to the substrate is triangular.
A display device comprising the display panel of any one of the above claims.
A preparation method of a display panel comprises the following steps:
preparing an array substrate, wherein one side of the array substrate, which is far away from the opposite substrate, is provided with a first polarization structure, and one side of the first polarization structure is a display surface;
the preparation of the opposite substrate specifically comprises the following steps:
preparing a flexible substrate on one side of the hard base facing the array substrate;
preparing a second polarizing film on a side of the flexible substrate facing the array substrate;
preparing a plurality of through grooves corresponding to the sub-pixel units on one side of the hard base, which is far away from the flexible substrate;
preparing a quantum dot unit in each through groove;
preparing an encapsulation layer on the quantum dot units, the encapsulation layer configured to seal the quantum dot units within corresponding grooves.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hard base and a flexible substrate of an opposite substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rigid substrate, a flexible substrate and a second polarizing film of an opposite substrate according to an embodiment of the present invention;
fig. 4 is a schematic view of a partial structure of a display panel after alignment of liquid crystals according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present invention after a hard substrate is etched to form a through groove;
fig. 6 is a schematic structural view of a display panel after a light-extracting layer is formed in a through groove according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel after quantum dot units are formed in through slots according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display panel after an encapsulation layer is formed according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel after a second reflective structure is formed according to an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a reflection principle of a second reflection structure in a display panel according to an embodiment of the present invention;
fig. 11 is a flowchart of a method for manufacturing a display panel according to an embodiment of the invention;
fig. 12 is a flowchart of a method for manufacturing an opposite substrate of a display panel according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1 to 9, an embodiment of the present invention provides a display panel, which includes an array substrate 1 and an opposite substrate 2 that are oppositely disposed, and a liquid crystal layer 3 located between the array substrate 1 and the opposite substrate 2; wherein:
one side of the array substrate 1, which is far away from the opposite substrate 2, is provided with a first polarization structure 11, and one side of the first polarization structure 11 is a display surface;
the counter substrate 2 includes: a substrate 22, a second polarizing film 21 positioned on the side of the substrate 22 facing the liquid crystal layer 3, and a color resistance structure positioned on the side of the substrate 22 facing away from the liquid crystal layer 3, the color resistance structure including a plurality of quantum dot units 23 corresponding to the sub-pixel units.
The display panel uses the quantum dot unit 23 as a color resistance structure, and uses the liquid crystal layer 3, the first polarization structure 11 and the second polarization film 21 as control switches, so as to realize the display of each sub-pixel. In addition, in the display panel, the quantum dot unit 23 is arranged on one side of the substrate 22 of the opposite substrate 2, which is far away from the liquid crystal layer 3, and the second polarizing film 21 is arranged on one side of the substrate 22, which faces the liquid crystal layer 3, because the surface of the substrate 22 is smooth and flat, the problem of pattern loss of the second polarizing film 21 in the nanoimprint manufacturing process can be avoided, the yield of the second polarizing film 21 can be greatly improved, and the display yield of the display panel can be further improved; in addition, the quantum dot unit 23 is positioned on one side adjacent to the backlight source and is close to the backlight source, so that the excitation efficiency is high, and the display brightness and the contrast can be improved; the second polarizing film 21 is closer to the liquid crystal layer 3 and is less affected before entering the liquid crystal layer 3, so that the display yield can be further ensured. In summary, the display panel has high light-emitting efficiency and high display yield.
As shown in fig. 1, in a specific embodiment, the substrate 22 of the opposite substrate 2 may be a flexible substrate 22, and the opposite substrate 2 further includes a hard base 24 located on a side of the flexible substrate 22 away from the liquid crystal layer 3, where the hard base 24 is used to carry the flexible substrate 22 and other film layer structures. Specifically, in the preparation process, the flexible substrate 22 is formed on the hard substrate 24, and then the second polarizing film 21 is prepared on the flexible substrate 22, so that the flatness of the nano-imprinted carrier surface can be ensured, and the preparation yield of the second polarizing film 21 is improved.
Optionally, as shown in fig. 5, the hard substrate 24 has through grooves 240 corresponding to the quantum dot units 23 one to one; each quantum dot unit 23 is located in the corresponding through groove 240; on one hand, the hard substrate 24 can play a role in carrying, isolating and protecting the quantum dot unit 23; on the other hand, the pattern of the hard substrate 24 is similar to the defining structure between the quantum dot units 23, which can facilitate the preparation of the quantum dot units 23 and improve the preparation yield.
Optionally, the material of the hard substrate 24 is glass; the material of the substrate 22 is Polyimide (PI), and white PI with high transmittance is preferable. Of course, the hard base 24 and the substrate 22 are not limited to the above materials, and may be other light-transmitting materials.
Optionally, the thickness of the hard substrate 24 is 0.1-0.5mm, preferably 0.1 mm; the thickness of the substrate 22 is less than 10 um. This arrangement can ensure the rigidity and the bearing capacity of the counter substrate 2, and can reduce the thickness of the counter substrate 2 as much as possible.
As shown in fig. 1, in a specific embodiment, the opposite substrate 2 further includes: an encapsulation layer on a side of the quantum dot unit 23 facing away from the substrate 22, the encapsulation layer configured to seal the quantum dot unit 23 within the corresponding through slot 240, preventing quantum dot material performance failures.
Optionally, the encapsulation layer includes encapsulation units 26 corresponding to the quantum dot units 23, and each encapsulation unit 26 seals the corresponding quantum dot unit 23 in the corresponding through groove 240.
Specifically, the light blocking structure may include three kinds of quantum dot units 23, the three kinds of quantum dot units 23 are excited to respectively radiate three kinds of primary color light, such as red light, green light, and blue light, the three kinds of quantum dot units 23 respectively correspond to three-color sub-pixels, and monochrome display of each color sub-pixel may be implemented.
Or, the backlight source adopts blue light, the photoresist structure includes two kinds of quantum dot units 23, the two kinds of quantum dot units 23 respectively radiate red light and green light, which respectively correspond to the red sub-pixel and the green sub-pixel, and the blue sub-pixel area is not provided with quantum dots, which can directly transmit light, and the backlight source can directly display through the blue sub-pixel area.
As shown in fig. 1, in a specific embodiment, the opposite substrate 2 further includes: the light extraction layer 25 is positioned in the through groove 240 and positioned on one side of the quantum dot unit 23 facing the substrate 22; specifically, the light extraction layer 25 includes at least two structural layers 250 arranged along the direction from the substrate 22 to the quantum dot unit 23, and the refractive index of the structural layer 250 near the substrate 22 is greater than the refractive index of the structural layer 250 near the quantum dot unit 23. The light extraction layer 25 can directionally extract the light radiated by the quantum dot unit 23, reduce the scattering of the light, and improve the light-emitting brightness and contrast of the sub-pixel.
As shown in fig. 1, in a specific embodiment, the display panel of the embodiment of the invention further includes a backlight 4 located on a side of the opposite substrate 2 away from the array substrate 1.
Optionally, the backlight 4 includes a light guide plate 41, a first reflective structure 42 located on a side of the light guide plate 41 facing away from the opposite substrate 2, and a light source located on a side of the light incident surface of the light guide plate 41.
Alternatively, the light source may be a blue LED, and excitation by the blue LED may cause different quantum dot units 23 to respectively radiate red light or green light.
As shown in fig. 1, in a specific embodiment, the opposite substrate 2 may further include: and a second reflective structure 27 located on a side of the hard base 24 facing away from the substrate 22, wherein a projection of the second reflective structure 27 onto the substrate 22 is located within a projection of the hard base 24 onto the substrate 22, i.e. a projected pattern of the second reflective structure 27 is arranged around the quantum dot unit 23. The second reflective structure 27 may reflect the backlight that reaches between the quantum dot units 23 to enter the quantum dot units 23, thereby improving the backlight utilization rate.
Optionally, the second reflective structure 27 has a triangular cross-section along a direction perpendicular to the substrate 22; specifically, each portion of the second reflective structure 27 located between adjacent quantum dot units 23 has a triangular prism shape, so that each portion has a triangular cross section, and the reflective structure includes a plurality of triangular cross sections as viewed along the cross section of the entire opposing substrate 2.
As shown in fig. 10, when the backlight reaches the surface of the triangular prism structure 270 from the light guide plate 41, the backlight may be reflected into the adjacent quantum dot units 23, so that the utilization rate of the backlight may be improved.
In a specific embodiment, the array substrate 1 further includes a thin film transistor array and a pixel electrode (not shown in the figure) corresponding to the sub-pixel for implementing circuit control and liquid crystal driving, and the thin film transistor array and the pixel electrode are located on a side of the substrate of the array substrate 1 facing the liquid crystal layer 3.
Further, as shown in fig. 1, the array substrate 1 further includes a light shielding layer 12, where the light shielding layer 12 is located between the thin film transistor array and the substrate, and is used to define sub-pixel openings, shield structures such as thin film transistors and metal lines, and prevent the panel from reflecting ambient light, thereby improving contrast.
The embodiment of the invention also provides a display device which comprises the display panel in any one of the embodiments.
In addition, as shown in fig. 11, an embodiment of the present invention further provides a method for manufacturing a display panel, including the following steps:
As shown in fig. 12, in a specific embodiment, the preparation of the opposite substrate 2 specifically includes the following steps:
Optionally, the material of the hard base 24 is glass, and the material of the flexible substrate 22 is PI.
Specifically, as shown in fig. 3, the flexible substrate 22 is located on the hard base 24, and has a smooth surface and a high flatness; the second polarizing film 21 uses the flexible substrate 22 as a carrier, and the problem of pattern deletion can be avoided in the manufacturing process of the nano-imprint process, so that the yield is high, and the display yield of the display panel can be further improved.
Optionally, before step 203, as shown in fig. 4, the array substrate 1 and the opposite substrate 2 may be subjected to box-to-box packaging; alternatively, after step 205, the array substrate 1 and the counter substrate 2 may be packaged in a package.
Optionally, in step 203, the hard substrate 22 may be etched until reaching the layer of the flexible substrate 22, so as to form a pattern of through-trenches 240. Further, before step 203, the hard substrate 22 may be thinned to as thin as 0.1 mm.
Optionally, in step 204, the quantum dot units 23 may be prepared by a printing or masking process, and each quantum dot unit 23 is to be located in the through groove 240 of the hard substrate 22.
Further, before step 204, i.e. between the quantum dot units 23, as shown in fig. 6, a light extraction layer 25 may be further deposited in the through-groove 240, where the light extraction layer 25 includes at least two structural layers 250, and the refractive index of the inner structural layer 250 is greater than that of the outer structural layer 250. By continuously improving the refractive index of the light-taking material, the light emitted by the quantum dot unit 23 can be prevented from diffusing to two sides, so that the directionality of the radiated light can be taken out, and the light-emitting brightness and the contrast of each sub-pixel can be improved.
Optionally, after step 205, the process of manufacturing the opposite substrate 2 may further include the following steps:
as shown in fig. 9, a second reflective structure 26 is prepared on the side of the hard base 24 facing away from the flexible substrate 22, and the projection of the second reflective structure 26 on the flexible substrate 22 is located within the projection of the hard base 24 on the flexible substrate 22, i.e. the projected pattern of the second reflective structure 26 is arranged around the quantum dot unit 23.
Optionally, the cross-section of the second reflective structure 26 along the direction perpendicular to the flexible substrate 22 is triangular; specifically, each portion of the second reflective structure 26 located between adjacent quantum dot units 23 has a triangular prism shape, and each portion has a triangular cross section, so that the second reflective structure 26 includes a plurality of triangular cross sections when viewed along the cross section of the entire opposing substrate 2. As shown in fig. 10, when the backlight reaches the surface of the triangular prism structure 270, it may be reflected into the adjacent quantum dot unit 23, so that the utilization rate of light may be improved.
In addition, as shown in fig. 1, the method for manufacturing a display panel according to the embodiment of the present invention may further include a process for manufacturing the backlight 4, specifically including the steps of preparing a light guide plate 41, preparing the first reflective structure 42 on the backlight side of the light guide plate 41, and disposing a light source on the light incident surface side of the light guide plate 41.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The display panel is characterized by comprising an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are arranged oppositely; wherein,
one side of the array substrate, which is far away from the opposite substrate, is provided with a first polarization structure, and one side of the first polarization structure is a display surface;
the counter substrate includes: the substrate, the second polarizing film positioned on one side of the substrate facing the liquid crystal layer and the color resistance structure positioned on one side of the substrate departing from the liquid crystal layer, wherein the color resistance structure comprises a plurality of quantum dot units corresponding to the sub-pixel units;
the substrate is a flexible substrate, and the substrate is made of polyimide; the counter substrate further includes: the hard substrate is positioned on one side, away from the liquid crystal layer, of the substrate, and is in direct contact with the flexible substrate; the hard substrate is provided with through grooves corresponding to the quantum dot units one by one; each quantum dot unit is positioned in a corresponding through groove;
the counter substrate further includes: the second reflecting structure is positioned on one side, away from the substrate, of the hard base, and the projection of the second reflecting structure on the substrate is positioned in the projection of the hard base on the substrate;
the second reflecting structure is triangular in cross section along the direction perpendicular to the substrate, and the surface of the second reflecting structure is configured to reflect light rays emitted from the backlight source into the adjacent through grooves.
2. The display panel according to claim 1, wherein the material of the hard substrate is glass and has a thickness of 0.1 to 0.5 mm; the thickness of the substrate is less than 10 um.
3. The display panel according to claim 1, wherein the counter substrate further comprises: the packaging layer is positioned on one side, away from the substrate, of the quantum dot unit; the encapsulation layer is configured to seal the quantum dot units within the corresponding through trenches.
4. The display panel according to claim 1, wherein the counter substrate further comprises: the light extraction layer is positioned in the through groove and positioned on one side, facing the substrate, of the quantum dot unit; the light extraction layer comprises at least two structural layers, and the refractive index of the structural layer close to the substrate is larger than that of the structural layer close to the quantum dot unit.
5. The display panel according to any one of claims 1 to 4, further comprising a backlight source located on a side of the opposite substrate facing away from the array substrate, the backlight source comprising a light guide plate and a first reflective structure located on a side of the light guide plate facing away from the opposite substrate.
6. A display device characterized by comprising the display panel according to any one of claims 1 to 5.
7. A method for manufacturing a display panel according to any one of claims 1 to 5, comprising the steps of:
preparing an array substrate, wherein one side of the array substrate, which is far away from the opposite substrate, is provided with a first polarization structure, and one side of the first polarization structure is a display surface;
the preparation of the opposite substrate specifically comprises the following steps:
preparing a flexible substrate on one side of the hard base facing the array substrate;
preparing a second polarizing film on a side of the flexible substrate facing the array substrate;
preparing a plurality of through grooves corresponding to the sub-pixel units on one side of the hard base, which is far away from the flexible substrate;
preparing a quantum dot unit in each through groove;
preparing an encapsulation layer on the quantum dot units, the encapsulation layer configured to seal the quantum dot units within the corresponding through trenches.
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