CN113593408A - Display module, manufacturing method thereof and mobile terminal - Google Patents

Display module, manufacturing method thereof and mobile terminal Download PDF

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Publication number
CN113593408A
CN113593408A CN202110767879.2A CN202110767879A CN113593408A CN 113593408 A CN113593408 A CN 113593408A CN 202110767879 A CN202110767879 A CN 202110767879A CN 113593408 A CN113593408 A CN 113593408A
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display module
reflection unit
layer
display panel
poly
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CN113593408B (en
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刘亚丽
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0977—Reflective elements
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The embodiment of the invention discloses a display module, a manufacturing method thereof and a mobile terminal; the display module comprises a folding area and plane areas positioned on two sides of the folding area, the display module comprises a display panel and an anti-reflection unit, and the anti-reflection unit covers the folding area; the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light irradiated on the antireflection unit in vacuum, n2K is a natural number, which is the refractive index of the antireflection unit; in the embodiment of the invention, the anti-reflection unit with specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the interference phase is utilizedThe principle disappears to reduce the reverberation of external light on display module assembly, reduce the user to the formation of image perception of the crease that probably appears in the folding district, improve the whole visual effect of display module assembly.

Description

Display module, manufacturing method thereof and mobile terminal
Technical Field
The invention relates to the field of display, in particular to a display module, a manufacturing method thereof and a mobile terminal.
Background
In recent years, foldable display module assembly receives people's favor more and more, nevertheless after buckling many times or long-time the putting, display module assembly can produce the crease in folding department, reduces the visual effect of user to display module assembly.
Therefore, a display module, a method for manufacturing the same, and a mobile terminal are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a display module, a manufacturing method thereof and a mobile terminal, which can solve the technical problem that the prior display module can generate creases at the folding position after being bent for multiple times or placed for a long time, and the visual effect of a user on the display module is reduced.
The embodiment of the invention provides a display module, which comprises a folding area and plane areas positioned on two sides of the folding area, wherein the display module comprises a display panel and an anti-reflection unit positioned on the display panel, and the anti-reflection unit covers the folding area;
wherein the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light in vacuum that impinges on the antireflective element, n2K is a natural number, which is a refractive index of the antireflection unit.
In one embodiment, the anti-reflection unit extends towards the plane area, the display panel is located in the folding area and the plane area, and an orthographic projection of the display panel on the anti-reflection unit is located in the anti-reflection unit.
In one embodiment, the anti-reflection unit includes a fluorinated polymer compound.
In one embodiment, the fluorinated polymer compound comprises any one or a combination of more of the following: poly (1,1,1,3,3, 3-hexafluoroisopropyl acrylate), poly (2,2,3,3,4,4, 4-heptafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl acrylate), poly (1,1,1,3,3, 3-hexafluoroisopropyl methacrylate), poly (2,2,3,4,4, 4-hexafluorobutyl acrylate), poly (2,2,3,4, 4-hexafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl acrylate), poly (2,2,3, 3-tetrafluoropropyl acrylate), Poly (2,2,3, 3-tetrafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl methacrylate).
In an embodiment, the module further includes a first auxiliary layer and a second auxiliary layer located at two sides of the anti-reflection unit, and the second auxiliary layer is located between the anti-reflection unit and the display panel; wherein n is1Less than n2，n2Less than n3，
Figure BDA0003152587040000021
n1Is the refractive index of the first auxiliary layer, n3The refractive index of the second auxiliary layer.
In an embodiment, the display module further includes an ultra-thin glass disposed on the display panel and a first adhesive layer disposed on the ultra-thin glass, the second auxiliary layer is disposed on the first adhesive layer, and the second auxiliary layer includes polyethylene terephthalate.
In an embodiment, the display module further includes a polarizing layer on the display panel, and a second adhesive layer on the polarizing layer, wherein the second auxiliary layer is on the second adhesive layer, and the second auxiliary layer includes transparent polyimide.
In an embodiment, the display module further includes a polarizing layer on the display panel, the anti-reflection unit on the polarizing layer, and a cover plate layer on the anti-reflection unit, where the polarizing layer is the second auxiliary layer, and the cover plate layer is the first auxiliary layer; wherein the polarizing layer is integrally provided with the antireflection unit.
The embodiment of the invention also provides a manufacturing method of the display module, which comprises a folding area and plane areas positioned at two sides of the folding area, and the manufacturing method of the display module comprises the following steps:
providing a display panel;
forming an anti-reflection unit covering the folding area on the display panel by using an evaporation process;
wherein the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light in vacuum that impinges on the antireflective element, n2Is that it isThe refractive index of the antireflection unit, k, is a natural number.
The embodiment of the invention also provides a mobile terminal, which comprises the display module and a terminal main body, wherein the terminal main body and the display module are combined into a whole.
According to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first structure of a display module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second structure of a display module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third structure of a display module according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a fourth structure of a display module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fifth structure of a display module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sixth structure of a display module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a seventh structure of a display module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an eighth structure of a display module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a ninth structure of a display module according to an embodiment of the present invention;
FIG. 10 is a flowchart illustrating a method for fabricating a display module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present 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. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, foldable display module assembly receives people's favor more and more, nevertheless after buckling many times or long-time the putting, display module assembly can produce the crease in folding department, reduces the visual effect of user to display module assembly.
Referring to fig. 1 to 9, an embodiment of the invention provides a display module 100, which includes a folding area B and a planar area a located at two sides of the folding area B, where the display module 100 includes a display panel 200 and an anti-reflection unit 300 located on the display panel 200, and the anti-reflection unit 300 covers the folding area B;
wherein the thickness of the anti-reflection unit 300 is (2k +1) λ/(4 n)2) λ is the wavelength of light irradiated on the anti-reflection unit 300 in vacuum, n2K is a natural number, which is a refractive index of the anti-reflection unit 300.
According to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
The technical solution of the present invention will now be described with reference to specific embodiments.
The display module 100 includes a folding area B and a planar area a located at two sides of the folding area B, the display module 100 includes a display panel 200 and an anti-reflection unit 300 located on the display panel 200, and the anti-reflection unit 300 covers the folding area B; wherein the thickness of the anti-reflection unit 300 is (2k +1) λ/(4 n)2) λ is the wavelength of light irradiated on the anti-reflection unit 300 in vacuum, n2For the refractive index of the anti-reflection unit 300, k is a natural number, please refer to fig. 1. The anti-reflection unit 300 covers the folding area B, the reflection unit is located along the propagation direction of the light emitted by the display panel 200 and close to one side of the external light, and the display module 100 is folded inwards or outwards without limitation, and is only shown by taking the folded inwards as an example hereinafter, the fold is most likely to appear in the folding area B, but the specific position where the fold appears is uncertain, the fold which is likely to appear in the folding area B is also covered by the anti-reflection unit 300, and the human eye perception of the external light near the fold is also reduced, so that the overall visual effect of the display module 100 is improved.
In this embodiment, fig. 1 is a folded state of the display module 100, and fig. 2 to 9 are all described by taking an unfolded state of the display module 100 as an example.
In this embodiment, a side of the anti-reflection unit 300 close to the light incident side is a first surface, a side close to the display panel 200 is a second surface, after the light reaches the first surface, a first portion of light 101 is reflected on the first surface, a second portion of light 102 is refracted by the first surface and then propagates in the anti-reflection unit 300, and then is reflected on the second surface toward the first surface, a path length difference between the first portion of light 101 and the second portion of light 102 is an odd multiple of a half-wavelength of the light refracted in the anti-reflection unit 300, the first portion of light 101 and the second portion of light 102 undergo destructive interference, specifically referring to fig. 2 and 5, it can be understood that two interfering lights are located at the same point to interfere, and the first portion of light 101 and the second portion of light 102 divided in the figures are only one of schematic light rays in the convenient drawings, in the figure, the dotted line without an arrow in the anti-reflection unit 300 is a light path for dividing regions with different refractive indexes conveniently, and the dotted line with an arrow is similar to the light path in the remaining figures and is not repeated, so that the reflected light of the external light on the display module 100 is reduced, the imaging perception of a user on the crease possibly appearing in the folding region B is reduced, and the overall visual effect of the display module 100 is improved.
In this embodiment, the anti-reflection unit 300 extends to the planar area a, the display panel 200 is located in the folding area B and the planar area a, and an orthogonal projection of the display panel 200 on the anti-reflection unit 300 is located in the anti-reflection unit 300, as shown in fig. 3. Will the whole face of antireflective unit 300 is laid, not only can be to crease in the folding zone B has the effect that reduces people's eye perception, also has obvious improvement to whole display module assembly 100's bad reflection of light, improves the whole visual effect of display module assembly 100.
In this embodiment, k may be any one of 0, 1, 2, and 3, and the thickness of the anti-reflection unit 300 may be 3 to 20 micrometers.
In this embodiment, in a direction from the folding area B to the plane area a, the thickness of the anti-reflection unit 300 gradually increases, specifically referring to fig. 4. When the second part of light 102 is reflected by the second surface, or the second part of light 102 is transmitted in the anti-reflection unit 300 and refracted by the first surface, because the thickness of the anti-reflection unit 300 is gradually increased, the angle of the second part of light 102 when the first surface is refracted is deviated from the direction away from the folding area B for the second time, the structure can make the light of the fold radiate towards the direction away from the folding area B, thereby reducing the reflected light of the external light on the display module 100, reducing the imaging perception of the user on the fold which may appear in the folding area B, and improving the overall visual effect of the display module 100.
In this embodiment, in a direction from the folding area B to the plane area a, the refractive index of the anti-reflection unit 300 is increasingly larger, specifically referring to fig. 5. In the process that the second part of light 102 is transmitted in the anti-reflection unit 300, the transmission direction angle of the second part of light 102 is deviated from the direction far away from the folding area B, and the structure can enable the light of the fold to be emitted in the direction far away from the folding area B, so that the reflected light of the external light on the display module 100 is reduced, the imaging perception of a user on the fold which may appear in the folding area B is reduced, and the overall visual effect of the display module 100 is improved.
In this embodiment, the different refractive index changes of the anti-reflection unit 300 may be continuous or segmented, and are not limited herein.
In this embodiment, the anti-reflection unit 300 includes a fluorinated polymer compound.
In this embodiment, the fluorinated polymer compound includes any one or a combination of more than one of the following: poly (1,1,1,3,3, 3-hexafluoroisopropyl acrylate), poly (2,2,3,3,4,4, 4-heptafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl acrylate), poly (1,1,1,3,3, 3-hexafluoroisopropyl methacrylate), poly (2,2,3,4,4, 4-hexafluorobutyl acrylate), poly (2,2,3,4, 4-hexafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl acrylate), poly (2,2,3, 3-tetrafluoropropyl acrylate), Poly (2,2,3, 3-tetrafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl methacrylate).
In this embodiment, the refractive indexes of the polymers are different, and the polymers may be mixed in different concentrations or used in different regions, and the change of the different refractive indexes of the anti-reflection unit 300 may be continuous or segmented, which is not limited herein.
In this embodiment, the module further includes a first auxiliary layer 400 and a second auxiliary layer 500 located at two sides of the anti-reflection unit 300, wherein the second auxiliary layer 500 is located between the anti-reflection unit 300 and the display panel 200; wherein n is1Less than n2，n2Less than n3，
Figure BDA0003152587040000061
n1Is the refractive index of the first auxiliary layer 400, n3The refractive index of the second auxiliary layer 500 is shown in fig. 6. After the rete that the external light increases progressively through the three-layer refracting index, and the refracting index of three-layer rete satisfies when as above requiring, the reflection light of external light can obviously descend, combines antireflective unit 300's structure can further reduce the reverberation of external light on display module assembly 100, reduces the user to the formation of image perception of the crease that probably appears in folding zone B, improves the whole visual effect of display module assembly 100.
In this example, n2Is 1.375 to 1.4, n1Is 1.3 to 1.35, n2Is 1.42 to 1.5.
In this embodiment, the display module 100 further includes an ultra-thin glass 600 disposed on the display panel 200 and a first bonding layer 710 disposed on the ultra-thin glass 600, the second auxiliary layer 500 is disposed on the first bonding layer 710, and the second auxiliary layer 500 includes polyethylene terephthalate (pet), as shown in fig. 7. The display module further includes a polarizing layer 800 and a second adhesive layer 720 between the ultra-thin glass 600 and the display panel 200, and the ultra-thin glass 600 may be UTG.
In this embodiment, the display module 100 further includes a polarizing layer 800 located on the display panel 200, and a second adhesive layer 720 located on the polarizing layer 800, the second auxiliary layer 500 is located on the second adhesive layer 720, and the second auxiliary layer 500 includes transparent polyimide, which is shown in fig. 8.
In this embodiment, the display module 100 further includes a polarizing layer 800 located on the display panel 200, the anti-reflection unit 300 located on the polarizing layer 800, and a cover plate layer 900 located on the anti-reflection unit 300, where the polarizing layer 800 is the second auxiliary layer 500, and the cover plate layer 900 is the first auxiliary layer 400; the polarizer layer 800 is integrated with the anti-reflection unit 300, please refer to fig. 9.
In this embodiment, the display panel 200 includes an array substrate and a light emitting component, and the light emitting component may be a self-light emitting component or a backlight liquid crystal component, that is, the type of the display panel 200 may be a self-light emitting display panel 200 or a liquid crystal display panel 200, which is not limited herein.
In this embodiment, the array substrate includes a substrate, a buffer layer located on the substrate, a light shielding layer located on the buffer layer, a first insulating layer located on the light shielding layer, an active layer located on the first insulating layer, a second insulating layer located on the active layer, a gate layer located on the second insulating layer, a third insulating layer located on the gate layer, a source drain layer located on the third insulating layer, and a fourth insulating layer located on the source drain layer. The substrate is positioned on the support member and the bonding layer is positioned between the substrate and the surface active component.
In this embodiment, the display panel 200 further includes an encapsulation member on the light emitting member.
In this embodiment, the self-light emitting display panel 200 may be an OLED, a Mini-LED, a Micro-LED, or a QLED.
According to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
Referring to fig. 10, an embodiment of the present invention further provides a manufacturing method of a display module 100, including a folding area B and a planar area a located on two sides of the folding area B, where the manufacturing method of the display module 100 includes:
s100, providing a display panel 200;
s200, forming an anti-reflection unit 300 covering the folding region B on the display panel 200 by using an evaporation process;
wherein the thickness of the anti-reflection unit 300 is (2k +1) λ/(4 n)2) λ is the wavelength of light irradiated on the anti-reflection unit 300 in vacuum, n2K is a natural number, which is a refractive index of the anti-reflection unit 300.
According to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
The technical solution of the present invention will now be described with reference to specific embodiments.
The display module comprises a folding area B and plane areas A positioned on two sides of the folding area B, and the manufacturing method of the display module 100 comprises the following steps:
s100, a display panel 200 is provided.
In this embodiment, the display panel 200 includes an array substrate and a light emitting component, and the light emitting component may be a self-light emitting component or a backlight liquid crystal component, that is, the type of the display panel 200 may be a self-light emitting display panel 200 or a liquid crystal display panel 200, which is not limited herein.
In this embodiment, the array substrate includes a substrate, a buffer layer located on the substrate, a light shielding layer located on the buffer layer, a first insulating layer located on the light shielding layer, an active layer located on the first insulating layer, a second insulating layer located on the active layer, a gate layer located on the second insulating layer, a third insulating layer located on the gate layer, a source drain layer located on the third insulating layer, and a fourth insulating layer located on the source drain layer. The substrate is positioned on the support member and the bonding layer is positioned between the substrate and the surface active component.
In this embodiment, the display panel 200 further includes an encapsulation member on the light emitting member.
In this embodiment, the self-light emitting display panel 200 may be an OLED, a Mini-LED, a Micro-LED, or a QLED.
S200, forming an anti-reflection unit 300 on the display panel 200 to cover the folding region B by using an evaporation process.
In this embodiment, the coating film is evaporated by a certain heating evaporation method and vaporized, and the particles fly to the surface of the substrate (which may be the display panel 200) to condense and form a film.
In this embodiment, the module further includes a first auxiliary layer 400 and a second auxiliary layer 500 located at two sides of the anti-reflection unit 300, wherein the second auxiliary layer 500 is located between the anti-reflection unit 300 and the display panel 200; wherein n is1Less than n2，n2Less than n3，
Figure BDA0003152587040000091
n1Is the refractive index of the first auxiliary layer 400, n3The refractive index of the second auxiliary layer 500 is shown in fig. 6. After the rete that the external light increases progressively through the three-layer refracting index, and the refracting index of three-layer rete satisfies when as above requiring, the reflection light of external light can obviously descend, combines antireflective unit 300's structure can further reduce the reverberation of external light on display module assembly 100, reduces the user to the formation of image perception of the crease that probably appears in folding zone B, improves the whole visual effect of display module assembly 100.
In this embodiment, step S200 includes:
s210a, forming the ultra-thin glass 600 on the display panel 200.
S220a, forming a first bonding layer 710 on the ultra-thin glass 600.
S230a, forming a second auxiliary layer 500 on the first adhesive layer 710.
S240a, forming an anti-reflection unit 300 on the second auxiliary layer 500.
S250a, forming a first auxiliary layer 400 on the anti-reflection unit 300.
In this embodiment, the display module 100 further includes an ultra-thin glass 600 disposed on the display panel 200 and a first bonding layer 710 disposed on the ultra-thin glass 600, the second auxiliary layer 500 is disposed on the first bonding layer 710, and the second auxiliary layer 500 includes polyethylene terephthalate (pet), as shown in fig. 7. The display module further includes a polarizing layer 800 and a second adhesive layer 720 between the ultra-thin glass 600 and the display panel 200, and the ultra-thin glass 600 may be UTG.
In this embodiment, step S200 includes:
s210b, forming a polarizing layer 800 on the display panel 200.
S220b, forming a second auxiliary layer 500 on the polarizing layer 800.
S230b, forming an anti-reflection unit 300 on the second auxiliary layer 500.
S240b, forming a first auxiliary layer 400 on the anti-reflection unit 300.
In this embodiment, the display module 100 further includes a polarizing layer 800 located on the display panel 200, and a second adhesive layer 720 located on the polarizing layer 800, the second auxiliary layer 500 is located on the second adhesive layer 720, and the second auxiliary layer 500 includes transparent polyimide, which is shown in fig. 8.
In this embodiment, step S200 includes:
s210c, forming a polarizing layer 800 on the display panel 200.
S220c, forming an anti-reflection unit 300 on the polarizing layer 800.
S230c, forming a cover sheet layer 900 on the anti-reflection unit 300.
In this embodiment, the display module 100 further includes a polarizing layer 800 located on the display panel 200, the anti-reflection unit 300 located on the polarizing layer 800, and a cover plate layer 900 located on the anti-reflection unit 300, where the polarizing layer 800 is the second auxiliary layer 500, and the cover plate layer 900 is the first auxiliary layer 400; the polarizer layer 800 is integrated with the anti-reflection unit 300, please refer to fig. 9.
In this embodiment, the display module 100 includes a folding area B and a planar area a located at two sides of the folding area B, the display module 100 includes a display panel 200 and an anti-reflection unit 300 located on the display panel 200, and the anti-reflection unit 300 covers the folding area B; wherein the thickness of the anti-reflection unit 300 is (2k +1) λ/(4 n)2) λ is the wavelength of light irradiated on the anti-reflection unit 300 in vacuum, n2For the refractive index of the anti-reflection unit 300, k is a natural number, please refer to fig. 1. The anti-reflection unit 300 covers the folding area B, the reflection unit is located along the propagation direction of the light emitted by the display panel 200 and close to one side of the external light, and the display module 100 is folded inwards or outwards without limitation, and is only shown by taking the folded inwards as an example hereinafter, the fold is most likely to appear in the folding area B, but the specific position where the fold appears is uncertain, the fold which is likely to appear in the folding area B is also covered by the anti-reflection unit 300, and the human eye perception of the external light near the fold is also reduced, so that the overall visual effect of the display module 100 is improved.
In this embodiment, a side of the anti-reflection unit 300 close to the light incident side is a first surface, a side close to the display panel 200 is a second surface, after the light reaches the first surface, a first part of light 101 is reflected on the first surface, a second part of light 102 is refracted by the first surface and then propagates in the anti-reflection unit 300, and then is reflected on the second surface toward the first surface, an optical path difference between the first part of light 101 and the second part of light 102 is an odd multiple of a half-wavelength of the light refracted in the anti-reflection unit 300, the first part of light 101 and the second part of light 102 undergo destructive interference, specifically refer to fig. 2 and 5, in the figures, a dotted line without an arrow in the anti-reflection unit 300 is a region with a different refractive index, a dotted line with an arrow is a light path, and similar figures are omitted for brevity, therefore, the reflected light of the external light on the display module 100 is reduced, the imaging perception of a user on the crease which possibly appears in the folding area B is reduced, and the overall visual effect of the display module 100 is improved.
In this embodiment, the anti-reflection unit 300 extends to the planar area a, the display panel 200 is located in the folding area B and the planar area a, and an orthogonal projection of the display panel 200 on the anti-reflection unit 300 is located in the anti-reflection unit 300, as shown in fig. 3. Will the whole face of antireflective unit 300 is laid, not only can be to crease in the folding zone B has the effect that reduces people's eye perception, also has obvious improvement to whole display module assembly 100's bad reflection of light, improves the whole visual effect of display module assembly 100.
In this embodiment, k may be any one of 0, 1, 2, and 3, and the thickness of the anti-reflection unit 300 may be 3 to 20 micrometers.
In this embodiment, in a direction from the folding area B to the plane area a, the thickness of the anti-reflection unit 300 gradually increases, specifically referring to fig. 4. When the second part of light 102 is reflected by the second surface, or the second part of light 102 is transmitted in the anti-reflection unit 300 and refracted by the first surface, because the thickness of the anti-reflection unit 300 is gradually increased, the angle of the second part of light 102 when the first surface is refracted is deviated from the direction away from the folding area B for the second time, the structure can make the light of the fold radiate towards the direction away from the folding area B, thereby reducing the reflected light of the external light on the display module 100, reducing the imaging perception of the user on the fold which may appear in the folding area B, and improving the overall visual effect of the display module 100.
In this embodiment, in a direction from the folding area B to the plane area a, the refractive index of the anti-reflection unit 300 is increasingly larger, specifically referring to fig. 5. In the process that the second part of light 102 is transmitted in the anti-reflection unit 300, the transmission direction angle of the second part of light 102 is deviated from the direction far away from the folding area B, and the structure can enable the light of the fold to be emitted in the direction far away from the folding area B, so that the reflected light of the external light on the display module 100 is reduced, the imaging perception of a user on the fold which may appear in the folding area B is reduced, and the overall visual effect of the display module 100 is improved.
In this embodiment, the different refractive index changes of the anti-reflection unit 300 may be continuous or segmented, and are not limited herein.
In this embodiment, the anti-reflection unit 300 includes a fluorinated polymer compound.
In this embodiment, the fluorinated polymer compound includes any one or a combination of more than one of the following: poly (1,1,1,3,3, 3-hexafluoroisopropyl acrylate), poly (2,2,3,3,4,4, 4-heptafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl acrylate), poly (1,1,1,3,3, 3-hexafluoroisopropyl methacrylate), poly (2,2,3,4,4, 4-hexafluorobutyl acrylate), poly (2,2,3,4, 4-hexafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl acrylate), poly (2,2,3, 3-tetrafluoropropyl acrylate), Poly (2,2,3, 3-tetrafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl methacrylate).
In this embodiment, the refractive indexes of the polymers are different, and the polymers may be mixed in different concentrations or used in different regions, and the change of the different refractive indexes of the anti-reflection unit 300 may be continuous or segmented, which is not limited herein.
According to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
Referring to fig. 11, an embodiment of the present invention further provides a mobile terminal 10, including any one of the display modules 100 and the terminal body 20, where the terminal body 20 and the display module 100 are combined into a whole.
For a specific structure of the display module 100, please refer to any one of the embodiments of the display module 100 and fig. 1 to 9, which are not described herein again.
In this embodiment, the terminal main body 20 may include a middle frame, a frame adhesive, and the like, and the mobile terminal 10 may be a mobile display terminal such as a display device, a mobile phone, a tablet, and the like, which is not limited herein.
The embodiment of the invention discloses a display module, a manufacturing method thereof and a mobile terminal; the display module comprises a folding area and plane areas positioned on two sides of the folding area, the display module comprises a display panel and an anti-reflection unit, and the anti-reflection unit covers the folding area; the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light irradiated on the antireflection unit in vacuum, n2K is a natural number, which is the refractive index of the antireflection unit; according to the embodiment of the invention, the anti-reflection unit with a specific thickness is arranged in the folding area, so that the ratio of the optical path difference of external light reflected by the upper surface and the lower surface of the anti-reflection unit to the half wavelength of light refracted in the anti-reflection unit is odd times, and the reflected light of the external light on the display module is reduced by utilizing the principle of destructive interference, so that the imaging perception of a user on the crease possibly appearing in the folding area is reduced, and the overall visual effect of the display module is improved.
The display module, the manufacturing method thereof and the mobile terminal provided by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A display module is characterized by comprising a folding area and plane areas positioned on two sides of the folding area, wherein the display module comprises a display panel and an anti-reflection unit positioned on the display panel, and the anti-reflection unit covers the folding area;
wherein the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light in vacuum that impinges on the antireflective element, n2K is a natural number, which is a refractive index of the antireflection unit.
2. The display module of claim 1, wherein the anti-reflection unit extends toward the planar area, the display panel is located in the folding area and the planar area, and an orthogonal projection of the display panel on the anti-reflection unit is located in the anti-reflection unit.
3. The display module of claim 1, wherein the anti-reflective element comprises a fluorinated polymer.
4. The display module according to claim 3, wherein the fluorinated polymer compound comprises any one or a combination of more than one of the following: poly (1,1,1,3,3, 3-hexafluoroisopropyl acrylate), poly (2,2,3,3,4,4, 4-heptafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl acrylate), poly (1,1,1,3,3, 3-hexafluoroisopropyl methacrylate), poly (2,2,3,4,4, 4-hexafluorobutyl acrylate), poly (2,2,3,4, 4-hexafluorobutyl methacrylate), poly (2,2,3,3, 3-pentafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl acrylate), poly (2,2,3, 3-tetrafluoropropyl acrylate), Poly (2,2,3, 3-tetrafluoropropyl methacrylate), poly (2,2, 2-trifluoroethyl methacrylate).
5. The display module of claim 1, further comprising a first auxiliary layer and a second auxiliary layer on either side of the anti-reflective element, the second auxiliary layer being between the anti-reflective element and the display panel;
wherein n is1Less than n2，n2Less than n3，
Figure FDA0003152587030000011
n1Is the refractive index of the first auxiliary layer, n3The refractive index of the second auxiliary layer.
6. The display module according to claim 5, further comprising an ultra-thin glass on the display panel and a first adhesive layer on the ultra-thin glass, wherein the second auxiliary layer is on the first adhesive layer, and wherein the second auxiliary layer comprises polyethylene terephthalate.
7. The display module according to claim 5, further comprising a polarizing layer on the display panel, a second adhesive layer on the polarizing layer, and a second auxiliary layer on the second adhesive layer, wherein the second auxiliary layer comprises a transparent polyimide.
8. The display module according to claim 5, further comprising a polarizing layer on the display panel, the antireflection unit on the polarizing layer, and a cover plate layer on the antireflection unit, wherein the polarizing layer is the second auxiliary layer, and the cover plate layer is the first auxiliary layer;
wherein the polarizing layer is integrally provided with the antireflection unit.
9. The manufacturing method of the display module is characterized by comprising a folding area and plane areas positioned on two sides of the folding area, and comprises the following steps:
providing a display panel;
forming an anti-reflection unit covering the folding area on the display panel by using an evaporation process;
wherein the thickness of the anti-reflection unit is (2k +1) lambda/(4 n)2) λ is the wavelength of light in vacuum that impinges on the antireflective element, n2K is a natural number, which is a refractive index of the antireflection unit.
10. A mobile terminal, comprising the display module according to any one of claims 1 to 8 and a terminal body, wherein the terminal body is integrated with the display module.
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