CN114859597B - Display backboard, display module and display device - Google Patents
Display backboard, display module and display device Download PDFInfo
- Publication number
- CN114859597B CN114859597B CN202210431864.3A CN202210431864A CN114859597B CN 114859597 B CN114859597 B CN 114859597B CN 202210431864 A CN202210431864 A CN 202210431864A CN 114859597 B CN114859597 B CN 114859597B
- Authority
- CN
- China
- Prior art keywords
- cytosine
- driving circuit
- sodium alginate
- guanine
- circuit layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010410 layer Substances 0.000 claims abstract description 116
- 238000005476 soldering Methods 0.000 claims abstract description 33
- 239000002346 layers by function Substances 0.000 claims abstract description 23
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 57
- 235000010413 sodium alginate Nutrition 0.000 claims description 57
- 229940005550 sodium alginate Drugs 0.000 claims description 57
- 239000000661 sodium alginate Substances 0.000 claims description 57
- UYTPUPDQBNUYGX-UHFFFAOYSA-N guanine Chemical compound O=C1NC(N)=NC2=C1N=CN2 UYTPUPDQBNUYGX-UHFFFAOYSA-N 0.000 claims description 44
- 229920000642 polymer Polymers 0.000 claims description 42
- 239000007787 solid Substances 0.000 claims description 38
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 32
- OPTASPLRGRRNAP-UHFFFAOYSA-N cytosine Chemical compound NC=1C=CNC(=O)N=1 OPTASPLRGRRNAP-UHFFFAOYSA-N 0.000 claims description 28
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 26
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 16
- 229910001424 calcium ion Inorganic materials 0.000 claims description 16
- 229940104302 cytosine Drugs 0.000 claims description 14
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 13
- 229960003638 dopamine Drugs 0.000 claims description 13
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000010382 chemical cross-linking Methods 0.000 claims description 5
- 238000004132 cross linking Methods 0.000 claims description 5
- 125000000524 functional group Chemical group 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 22
- 238000002310 reflectometry Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 14
- 239000000758 substrate Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 229910000679 solder Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- 229930024421 Adenine Natural products 0.000 description 1
- GFFGJBXGBJISGV-UHFFFAOYSA-N Adenine Chemical compound NC1=NC=NC2=C1N=CN2 GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229960000643 adenine Drugs 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002165 resonance energy transfer Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses a display backboard, a display module and a display device; the display backboard comprises a driving circuit layer, a plurality of light-emitting units positioned on one side of the driving circuit layer, a reflecting functional layer positioned on the driving circuit layer and on the same side as the light-emitting units, and a plurality of electric connection units positioned between the driving circuit layer and the light-emitting units and electrically connected with the driving circuit layer and the light-emitting units, wherein any electric connection unit comprises ultraviolet light self-healing gel; according to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit between the light-emitting unit and the driving circuit layer, and after the light-emitting unit reaches the corresponding position of the driving circuit layer, the cross section of the electric connection unit is healed by ultraviolet light, so that the bonding between the light-emitting unit and the driving circuit layer is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer is avoided, the reflectivity of the display backboard is improved, and the display effect is improved.
Description
Technical Field
The invention relates to the field of display, in particular to a display backboard, a display module and a display device.
Background
In recent years, a Micro LED or Mini LED display backboard has the advantages of quick response, high color gamut, high PPI, low energy consumption, accurate dimming realized by ultrahigh partition number, ultrahigh contrast ratio and the like, one of the methods is to improve the overall reflectivity in order to improve the display brightness, improve the light emitting efficiency and reduce the energy consumption, a layer of high-reflectivity white oil is coated on a driving circuit layer to serve as a reflecting functional layer, and when a light emitting unit is electrically connected with the driving circuit layer, the temperature of common reflow soldering is higher, so that the white oil is yellowing, the reflectivity of the display backboard is reduced, and the display effect is affected.
Therefore, a display back plate, a display module and a display device are needed to solve the above-mentioned problems.
Disclosure of Invention
The invention provides a display backboard, a display module and a display device, which can relieve the technical problem that the reflection function layer is yellow due to current reflow soldering.
The invention provides a display backboard, comprising:
a drive line layer;
a plurality of light emitting units located at one side of the driving circuit layer;
the reflection functional layer is positioned on the driving circuit layer and is on the same side as the light-emitting unit;
a plurality of electrical connection units located between the driving circuit layer and the light emitting unit and electrically connected with the driving circuit layer and the light emitting unit;
wherein any one of the electrical connection units comprises an ultraviolet light self-healing gel.
Preferably, any of said electrical connection units comprises a fully cross-linked cytosine-guanine acrylate grafted sodium alginate solid polymer.
Preferably, in any of the electrical connection units, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer comprises sodium alginate, non-free acrylated guanine, non-free cytosine, non-free acrylamide, and non-free acrylated dopamine.
Preferably, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer further comprises calcium ions; wherein the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer comprises a paired hydrogen bond dynamic network between cytosine and guanine, an ultraviolet-induced chemical crosslinking network and a crosslinking dynamic network of sodium alginate and calcium ions.
Preferably, in any of the electrical connection units, the sodium alginate has a mass content of 35% to 40% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer, the non-free-state acrylated guanine has a mass content of 15% to 18% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer, the non-free-state cytosine has a mass content of 15% to 18% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer, the non-free-state acrylamide has a mass content of 15% to 18% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer, the non-free-state acrylated dopamine has a mass content of 8% to 10% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer, and the calcium ion has a mass content of 5% to 7% in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer.
Preferably, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer further comprises a functional group comprising a terphenyl group.
Preferably, at least one of the electrical connection units further comprises a terphenyl derivative.
Preferably, the electrical connection unit includes a bonding pad near one side of the driving circuit layer and a bonding pad near one side of the light emitting unit; the welding pad and the welding leg are integrally arranged, and the welding pad and the welding leg comprise the ultraviolet light self-healing gel.
The invention also provides a display module, which comprises the display backboard.
The invention also provides a display device comprising the display module and a device main body, wherein the device main body and the display module are combined into a whole.
The invention has the beneficial effects that: according to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit between the light-emitting unit and the driving circuit layer, and after the light-emitting unit reaches the corresponding position of the driving circuit layer, the cross section of the electric connection unit is healed by ultraviolet light, so that the bonding between the light-emitting unit and the driving circuit layer is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer is avoided, the reflectivity of the display backboard is improved, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first structure of a display back plate according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second structure of a display back plate according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps of a method for fabricating a display back panel according to an embodiment of the present invention;
fig. 4A to 4D are schematic flow diagrams of a first method for manufacturing a display back plate according to an embodiment of the invention;
fig. 5A and 5B are schematic diagrams of a second flow chart of a method for manufacturing a display back plate according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a display module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the invention. In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
In recent years, micro LEDs or Mini LEDs display back plates have the advantages of fast response, high color gamut, high PPI, low energy consumption, realization of accurate dimming by ultra-high partition number, ultra-high contrast ratio and the like, one of the methods is to improve the overall reflectivity in order to improve the display brightness, improve the light emitting efficiency and reduce the energy consumption, a layer of high-reflectivity white oil is coated on a driving circuit layer to serve as a reflective functional layer, when a light emitting unit is electrically connected with the driving circuit layer, the temperature of common reflow soldering is higher, the white oil is oxidized under the condition of high temperature, and after free radicals are generated, oxides with double bonds (-c=c-) carbonyl (> c=o), carboxyl (-COH) and hydroxyl (-OH) are further generated. The carbon double-bond (-C=C-) carbonyl (> C=O), carboxyl (-COH) and hydroxyl (-OH) generated by oxidation of the white oil under the atmosphere of high temperature and oxygen are chromophores and color assisting groups, so that the white oil is yellowing after reflow soldering, the reflectivity of the display backboard is reduced, and the display effect is affected.
Referring to fig. 1 and 2, a display back plate 100 according to an embodiment of the present invention includes:
a driving circuit layer 200;
a plurality of light emitting units 300 positioned at one side of the driving circuit layer 200;
a reflection function layer 400 on the driving circuit layer 200 and on the same side as the light emitting unit 300;
a plurality of electrical connection units 500 positioned between the driving circuit layer 200 and the light emitting unit 300 and electrically connected to the driving circuit layer 200 and the light emitting unit 300;
wherein any of the electrical connection units 500 comprises an ultraviolet light self-healing gel.
According to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit 500 between the light-emitting unit 300 and the driving circuit layer 200, after the light-emitting unit 300 reaches the corresponding position of the driving circuit layer 200, the cross section of the electric connection unit 500 is healed by ultraviolet light, so that the bonding between the light-emitting unit 300 and the driving circuit layer 200 is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer 400 is avoided, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
The technical scheme of the present invention will now be described with reference to specific embodiments.
In this embodiment, referring to fig. 1, the display back plate 100 includes a driving circuit layer 200, a plurality of light emitting units 300 located on one side of the driving circuit layer 200, a reflective functional layer 400 located on the driving circuit layer 200 and on the same side as the light emitting units 300, and a plurality of electrical connection units 500 located between the driving circuit layer 200 and the light emitting units 300 and electrically connected to the driving circuit layer 200 and the light emitting units 300; wherein any of the electrical connection units 500 comprises an ultraviolet light self-healing gel.
The electrical connection unit 500 includes an ultraviolet self-healing gel, after the light emitting unit 300 reaches the corresponding position of the driving circuit layer 200, the ultraviolet is utilized to induce the corresponding section between the light emitting unit 300 and the electrical connection unit 500 at two sides of the driving circuit layer 200, and the ultraviolet self-healing gel can perform self-healing, so that the bonding between the light emitting unit 300 and the driving circuit layer 200 is realized, meanwhile, a high-temperature reflow soldering bonding process is not required, even if repairing is required subsequently, the ultraviolet can be used for inducing again, the influence of repeated reflow soldering on the reflective performance of the reflective functional layer 400 is reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, any of the electrical connection units 500 comprises a fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer.
The dopamine acrylate and the acrylamide are used as cross-linking agents, and finally, the completely cross-linked cytosine-guanine acrylate grafted sodium alginate solid polymer is formed through ultraviolet light induction, a paired hydrogen bond dynamic network between cytosine and guanine and an ultraviolet-induced chemical cross-linking network exist in the system, so that the bonding between the light-emitting unit 300 and the driving circuit layer 200 is finally realized, meanwhile, a high-temperature reflow soldering bonding process is not needed, even if the subsequent repair is needed, the ultraviolet light can be used for inducing again, the influence of repeated reflow soldering on the reflection performance of the reflection functional layer 400 is reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, in any of the electrical connection units 500, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer includes sodium alginate, non-free acrylated guanine, non-free cytosine, non-free acrylamide, and non-free acrylated dopamine.
In the composition of the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer in the final product, sodium alginate is taken as a main body, acrylamide is crosslinked from a partial free state to a non-free state, and acrylated dopamine is crosslinked from a partial free state to a non-free state, so that self-healing is facilitated, a paired hydrogen bond dynamic network between cytosine and guanine and an ultraviolet induced chemical crosslinking network are finally formed, bonding between the light-emitting unit 300 and the driving circuit layer 200 is realized, and meanwhile, a high-temperature reflow soldering bonding process is not required, even if repair is required later, the influence of repeated reflow soldering on the reflection performance of the reflection functional layer 400 can be reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer further comprises calcium ions; wherein the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer comprises a paired hydrogen bond dynamic network between cytosine and guanine, an ultraviolet-induced chemical crosslinking network and a crosslinking dynamic network of sodium alginate and calcium ions.
The calcium ions are added into the ultraviolet self-healing gel, so that the impedance of the ultraviolet self-healing gel can be reduced, good conductivity is ensured, a cross-linked dynamic network of sodium alginate and calcium ions is formed, self-healing is facilitated, a paired hydrogen bond dynamic network between cytosine and guanine, an ultraviolet induced chemical cross-linked network and a cross-linked dynamic network of sodium alginate and calcium ions are finally formed, bonding between the light-emitting unit 300 and the driving circuit layer 200 is realized, and meanwhile, a high-temperature reflow soldering bonding process is not required, even if repair is required later, the ultraviolet light can be used for re-induction, the influence of repeated reflow soldering on the reflection performance of the reflection functional layer 400 is reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, in any of the electrical connection units 500, the sodium alginate is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 35% to 40%, the non-free-state acrylated guanine is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 15% to 18%, the non-free-state cytosine is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 15% to 18%, the non-free-state acrylamide is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 15% to 18%, the non-free-state acrylated dopamine is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 8% to 10%, and the calcium ion is present in the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid state polymer in a mass amount of 5% to 7%.
The sodium alginate is used as the main body of the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer, the content of the sodium alginate solid polymer accounts for a large part, and the calcium ions are used as the conductive enhancing component, and the content of the calcium ions is small.
In some embodiments, the fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer further comprises a functional group comprising a terphenyl group.
The functional group containing terphenyl is added into the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer, the functional group containing terphenyl can transfer resonance energy, the ultraviolet light utilization rate is improved, and accordingly ultraviolet light absorption is improved, the corresponding sections between the light-emitting unit 300 and the electric connection units 500 on two sides of the driving circuit layer 200 are better induced, self-healing of ultraviolet light self-healing gel materials is accelerated, bonding between the light-emitting unit 300 and the driving circuit layer 200 is achieved, meanwhile, a high-temperature reflow soldering bonding process is not needed, even if repair is needed later, the influence of repeated reflow soldering on the reflection performance of the reflection functional layer 400 can be reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, at least one of the electrical connection units 500 further comprises a terphenyl derivative.
The terphenyl derivative is directly added into the electric connection unit 500, so that resonance energy transfer can be performed, the ultraviolet light utilization rate is improved, the ultraviolet light absorption is improved, the corresponding sections between the light-emitting unit 300 and the electric connection units 500 at two sides of the driving circuit layer 200 are better induced, the self-healing of ultraviolet light self-healing gel materials is accelerated, the bonding between the light-emitting unit 300 and the driving circuit layer 200 is realized, meanwhile, a high-temperature reflow soldering bonding process is not required, even if repair is required later, the ultraviolet light can be used for re-induction, the influence of repeated reflow soldering on the reflection performance of the reflection functional layer 400 is reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, the terphenyl derivative can be any one or a combination of the following:
in some embodiments, referring to fig. 1 and 2, the electrical connection unit 500 includes a pad 510 near the driving circuit layer 200, and a solder tail 520 near the light emitting unit 300; the bonding pad 510 and the soldering leg 520 are integrally arranged, and the bonding pad 510 and the soldering leg 520 both comprise the ultraviolet light self-healing gel.
In the manufacturing process, the bonding pad 510 is in aligned contact with the solder leg 520, and the contact end surface between the bonding pad 510 and the solder leg 520 is self-healed through ultraviolet light induction, so that the bonding between the light emitting unit 300 and the driving circuit layer 200 is realized, and meanwhile, a high-temperature reflow soldering bonding process is not required, even if the subsequent repair is required, the ultraviolet light can be used for inducing again, the influence of the repeated reflow soldering on the reflection performance of the reflection functional layer 400 is reduced, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
In some embodiments, the display back plate 100 may be used as a backlight of the display module 10, or may be used as a direct display of the display module 10, which is not limited herein.
In some embodiments, the display back plate 100 further includes a substrate 110 located on a side of the driving circuit layer 200 away from the light emitting unit 300, and the driving circuit layer 200 includes an active layer located on the substrate 110, a first insulating layer located on the active layer, a gate layer located on the first insulating layer, a second insulating layer located on the gate layer, a source drain layer located on the second insulating layer, and a third insulating layer located on the source drain layer. The third insulating layer includes a plurality of vias, and the bonding pads 510 are electrically connected to the source/drain layers through the vias.
In some embodiments, the reflective functional layer 400 may be white oil, which is only used herein as an example and is not particularly limited.
In some embodiments, the light emitting unit 300 may include a Micro LED or a Mini LED, which is not particularly limited herein.
In some embodiments, referring to fig. 2, the contact surface of the pad 510 and the fillet 520 is a cambered surface. The contact area can be increased, especially the ultraviolet self-healing gel is combined, the cambered surface can bear slight extrusion, the ultraviolet irradiation is convenient, the ultraviolet induction area is increased, and the self-healing connection stability is improved.
According to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit between the light-emitting unit and the driving circuit layer, and after the light-emitting unit reaches the corresponding position of the driving circuit layer, the cross section of the electric connection unit is healed by ultraviolet light, so that the bonding between the light-emitting unit and the driving circuit layer is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer is avoided, the reflectivity of the display backboard is improved, and the display effect is improved.
Referring to fig. 3, the embodiment of the invention further provides a method for manufacturing the display backboard 100, which includes:
s100, providing a substrate 110.
S200, a driving circuit layer 200 is formed on the substrate 110 side.
S300, forming a plurality of pads 510 on the driving circuit layer 200, where any pad 510 includes an ultraviolet light self-healing gel.
S400, providing a plurality of light emitting units 300, forming two fillets 520 at corresponding positions on the light emitting units 300, wherein any one of the fillets 520 comprises an ultraviolet light self-healing gel.
S500, aligning the welding pins 520 with the welding pads 510.
And S600, irradiating the bonding pad 510 and the soldering leg 520 by utilizing ultraviolet light so as to integrally arrange the bonding pad 510 and the soldering leg 520 to form the electric connection unit 500.
According to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit 500 between the light-emitting unit 300 and the driving circuit layer 200, after the light-emitting unit 300 reaches the corresponding position of the driving circuit layer 200, the cross section of the electric connection unit 500 is healed by ultraviolet light, so that the bonding between the light-emitting unit 300 and the driving circuit layer 200 is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer 400 is avoided, the reflectivity of the display backboard 100 is improved, and the display effect is improved.
The technical scheme of the present invention will now be described with reference to specific embodiments.
In this embodiment, the manufacturing method of the display backboard 100 includes:
s100, a substrate 110 is provided, please refer to FIG. 4A.
In some embodiments, the material of the substrate 110 may be a hard material, such as glass, or may be a flexible material, such as polyimide, which is not specifically limited herein.
S200, a driving circuit layer 200 is formed on one side of the substrate 110, please refer to FIG. 4A.
In some embodiments, the display back plate 100 further includes a substrate 110 located on a side of the driving circuit layer 200 away from the light emitting unit 300, and the driving circuit layer 200 includes an active layer located on the substrate 110, a first insulating layer located on the active layer, a gate layer located on the first insulating layer, a second insulating layer located on the gate layer, a source drain layer located on the second insulating layer, and a third insulating layer located on the source drain layer. The third insulating layer includes a plurality of vias, and the bonding pads 510 are electrically connected to the source/drain layers through the vias.
In some embodiments, step S200 includes:
s210, a driving circuit layer 200 is formed on one side of the substrate 110, see FIG. 4A.
S220, a reflective layer 400 is formed on the driving circuit layer 200, please refer to fig. 4A.
In some embodiments, the reflective functional layer 400 is located on the driving line layer 200 and on the same side as the light emitting unit 300.
S300, a plurality of bonding pads 510 are formed on the driving circuit layer 200, wherein any bonding pad 510 includes UV self-healing gel, see FIG. 4B.
In some embodiments, the ultraviolet light self-healing gel comprises, in a starting material, a cross-linked cytosine-guanine acrylate grafted sodium alginate gel polymer that is not fully cross-linked, the cross-linked cytosine-guanine acrylate grafted sodium alginate gel polymer comprising sodium alginate, non-free-state acrylated guanine, non-free-state cytosine, acrylamide, acrylated dopamine, and calcium ions. Wherein, the acrylamide comprises free acrylamide and non-free acrylamide, the free acrylamide is used for crosslinking, the acrylated dopamine comprises free acrylated dopamine and non-free acrylated dopamine, and the free acrylated dopamine is used for crosslinking.
In some embodiments, the incompletely crosslinked cytosine-guanine acrylate grafted sodium alginate gel polymer can be prepared by the following methods 1, 2, 3 in the raw material before irradiation with ultraviolet light:
in some embodiments, the step of forming the plurality of pads 510 on the driving circuit layer 200 includes:
s310, forming a first pattern 410 on the driving circuit layer 200 by using silk screen printing, wherein the cross-linked cytosine-guanine acrylate grafted sodium alginate gel polymer is not fully cross-linked, please refer to FIG. 5A.
S320, pre-curing the first pattern 410.
S330, exposing and developing the first pattern 410 to form a second pattern 420, see FIG. 5B.
In some embodiments, the second pattern 420 is more refined than the first pattern 410 after undergoing exposure development, which is advantageous for conductive precision stabilization.
S340, performing main curing on the second pattern 420 to form a plurality of pads 510, please refer to FIG. 5B.
In some embodiments, after silk-screen film formation, a paired hydrogen bond dynamic network between cytosine and adenine is formed before ultraviolet light irradiation, a cross-linked dynamic network of sodium alginate and calcium ions is formed, and an ultraviolet induced chemical cross-linked network is not formed yet.
S400, providing a plurality of light emitting units 300, forming two fillets 520 at corresponding positions on the light emitting units 300, wherein any one of the fillets 520 comprises an ultraviolet self-healing gel, please refer to fig. 4C.
In some embodiments, the material content of the solder fillets 520 may be similar to the material content of the solder pads 510 and may be adjusted according to the actual situation.
S500, align the solder tail 520 with the solder pad 510, please refer to FIG. 4D.
In some embodiments, the fillets 520 are aligned with the pads 510, with contact surfaces between the pads 510 and the fillets 520.
In some embodiments, the contact surface of the pad 510 and the fillet 520 is a cambered surface. The contact area can be increased, especially the ultraviolet self-healing gel is combined, the cambered surface can bear slight extrusion, the ultraviolet irradiation is convenient, the ultraviolet induction area is increased, and the self-healing connection stability is improved.
S600, irradiating the bonding pad 510 and the soldering leg 520 with ultraviolet light, so that the bonding pad 510 and the soldering leg 520 are integrally arranged to form the electrical connection unit 500, please refer to fig. 4D, fig. 1 and fig. 2.
In some embodiments, the ultraviolet light is irradiated under the condition of wavelength 313nm to 425nm and irradiation power of 8mW/cm 3 To 30mW/cm 3 The irradiation time is 20min to 60min.
In some embodiments, the irradiation condition of the ultraviolet light is 365nm wavelength, and the irradiation power is 20mW/cm 3 The irradiation time was 30min.
In some embodiments, the system is a mixture prior to uv irradiation, and as an example, consists essentially of the following macromolecules:
small molecules that also include a polymerizable group that can coordinate carbon-carbon double bondsSmall moleculesThe schematic is as follows:
under the action of UV light, the part containing carbon-carbon double bonds in the system is further polymerized, and the system is crosslinked and solidified, which is schematically shown as follows:
in some embodiments, the light emitting unit 300 may include a Micro LED or a Mini LED, which is not particularly limited herein.
According to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit between the light-emitting unit and the driving circuit layer, and after the light-emitting unit reaches the corresponding position of the driving circuit layer, the cross section of the electric connection unit is healed by ultraviolet light, so that the bonding between the light-emitting unit and the driving circuit layer is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer is avoided, the reflectivity of the display backboard is improved, and the display effect is improved.
Referring to fig. 6, the embodiment of the invention further provides a display module 10 including a display back plate 100 as described above.
In this embodiment, the display module 10 may be a liquid crystal display module 10 or a self-luminous display module 10. That is, the display back plate 100 may be used as a backlight module of the liquid crystal display module 10 or as a display device of the self-luminous display module 10.
In some embodiments, the display module 10 may be a liquid crystal display module 10, and the display module 10 further includes a liquid crystal layer, a color film layer, and upper and lower polarizing layers.
Referring to fig. 7, the embodiment of the invention further provides a display device 1, including any one of the display modules 10 and the device main body 2, wherein the device main body 2 and the display module 10 are combined into a whole.
The specific structure of the display module 10 and the display back plate 100 is shown in any of the embodiments of the display module 10 and the display back plate 100 and the drawings, and will not be described herein.
In this embodiment, the device main body 2 may include a middle frame, a frame glue, etc., and the display device 1 may be a display terminal such as a mobile phone, a tablet, a television, etc., which is not limited herein.
The embodiment of the invention discloses a display backboard, a display module and a display device; the display backboard comprises a driving circuit layer, a plurality of light-emitting units positioned on one side of the driving circuit layer, a reflecting functional layer positioned on the driving circuit layer and on the same side as the light-emitting units, and a plurality of electric connection units positioned between the driving circuit layer and the light-emitting units and electrically connected with the driving circuit layer and the light-emitting units, wherein any electric connection unit comprises ultraviolet light self-healing gel; according to the invention, the ultraviolet self-healing gel is used as a component of the electric connection unit between the light-emitting unit and the driving circuit layer, and after the light-emitting unit reaches the corresponding position of the driving circuit layer, the cross section of the electric connection unit is healed by ultraviolet light, so that the bonding between the light-emitting unit and the driving circuit layer is completed, the influence of high temperature of a reflow soldering process on the reflection functional layer is avoided, the reflectivity of the display backboard is improved, and the display effect is improved.
The display backboard, the display module and the display device provided by the embodiment of the invention are described in detail, and specific examples are applied to the description of the principle and the implementation mode of the invention, and the description of the above examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (5)
1. A display back sheet, comprising:
a drive line layer;
a plurality of light emitting units located at one side of the driving circuit layer;
the reflection functional layer is positioned on the driving circuit layer and is on the same side as the light-emitting unit;
a plurality of electrical connection units located between the driving circuit layer and the light emitting unit and electrically connected with the driving circuit layer and the light emitting unit;
wherein any one of the electrical connection units comprises an ultraviolet light self-healing gel; any electric connection unit comprises a completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer, and comprises a bonding pad close to one side of the driving circuit layer and a welding leg close to one side of the light-emitting unit; the bonding pad and the soldering leg are integrally arranged, the bonding pad and the soldering leg both comprise the ultraviolet light self-healing gel, in any one of the electric connection units, the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer comprises sodium alginate, non-free acrylic guanine, non-free cytosine, non-free acrylamide and non-free acrylic dopamine, and the completely crosslinked cytosine-acrylic guanine grafted sodium alginate solid polymer also comprises calcium ions;
wherein the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer comprises a paired hydrogen bond dynamic network between cytosine and guanine, an ultraviolet-induced chemical crosslinking network and a crosslinking dynamic network of sodium alginate and calcium ions.
2. The display back sheet according to claim 1, wherein in any of the electrical connection units, the sodium alginate has a mass content of 35% to 40% in the completely crosslinked cytosine-guanine-acrylate-grafted sodium alginate solid polymer,
the mass content of the non-free state acrylated guanine in the fully cross-linked cytosine-acrylic acid guanine grafted sodium alginate solid polymer is 15 to 18 percent,
the mass content of the non-free cytosine in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer is 15 to 18 percent,
the mass content of the non-free acrylamide in the completely crosslinked cytosine-acrylic acid guanine grafted sodium alginate solid polymer is 15 to 18 percent,
the mass content of the non-free state acrylated dopamine in the fully cross-linked cytosine-acrylic acid guanine grafted sodium alginate solid polymer is 8 to 10 percent,
the mass content of the calcium ions in the completely crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer is 5 to 7 percent.
3. The display back sheet of claim 1, wherein said fully crosslinked cytosine-guanine acrylate grafted sodium alginate solid polymer further comprises a functional group comprising a terphenyl group.
4. A display module comprising the display back panel of any one of claims 1 to 3.
5. A display device comprising the display module of claim 4 and a device body integrally combined with the display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210431864.3A CN114859597B (en) | 2022-04-22 | 2022-04-22 | Display backboard, display module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210431864.3A CN114859597B (en) | 2022-04-22 | 2022-04-22 | Display backboard, display module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114859597A CN114859597A (en) | 2022-08-05 |
| CN114859597B true CN114859597B (en) | 2023-10-17 |
Family
ID=82633950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210431864.3A Active CN114859597B (en) | 2022-04-22 | 2022-04-22 | Display backboard, display module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114859597B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013119604A (en) * | 2011-12-08 | 2013-06-17 | Hitachi Chemical Co Ltd | Adhesive resin composition for image display device, and adhesive sheet for image display device and image display device using the adhesive resin composition |
| CN110398857A (en) * | 2019-07-15 | 2019-11-01 | 青岛海信电器股份有限公司 | Micro-led lamp plate, its production method, backlight module and display device |
| CN112017550A (en) * | 2019-05-31 | 2020-12-01 | 云谷（固安）科技有限公司 | Display panel, manufacturing method thereof and display device |
| CN113648453A (en) * | 2021-08-12 | 2021-11-16 | 同济大学 | Conductive self-healing hydrogel with adhesiveness and preparation method thereof |
| CN113817180A (en) * | 2021-09-15 | 2021-12-21 | 大连理工大学 | Preparation of biocompatible conductive hydrogel for electroencephalogram signal sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8205327B2 (en) * | 2005-11-21 | 2012-06-26 | Panasonic Corporation | Method for manufacturing circuit board on which electronic component is mounted |
-
2022
- 2022-04-22 CN CN202210431864.3A patent/CN114859597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013119604A (en) * | 2011-12-08 | 2013-06-17 | Hitachi Chemical Co Ltd | Adhesive resin composition for image display device, and adhesive sheet for image display device and image display device using the adhesive resin composition |
| CN112017550A (en) * | 2019-05-31 | 2020-12-01 | 云谷（固安）科技有限公司 | Display panel, manufacturing method thereof and display device |
| CN110398857A (en) * | 2019-07-15 | 2019-11-01 | 青岛海信电器股份有限公司 | Micro-led lamp plate, its production method, backlight module and display device |
| CN113648453A (en) * | 2021-08-12 | 2021-11-16 | 同济大学 | Conductive self-healing hydrogel with adhesiveness and preparation method thereof |
| CN113817180A (en) * | 2021-09-15 | 2021-12-21 | 大连理工大学 | Preparation of biocompatible conductive hydrogel for electroencephalogram signal sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114859597A (en) | 2022-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106146729B (en) | A kind of selfreparing flexible printed circuit board and preparation method thereof | |
| CN1837864A (en) | Liquid crystal lens and optical device | |
| WO2020029394A1 (en) | Conductive adhesive and method for bonding circuit board | |
| CN208336216U (en) | A kind of display device and display terminal | |
| WO2020062525A1 (en) | Panel light source, preparation method therefor and display apparatus using panel light source | |
| CN114859597B (en) | Display backboard, display module and display device | |
| CN106772768A (en) | A kind of Multifunctional LED backlight | |
| CN107078071A (en) | The manufacture method of connector, the connection method of electronic unit, connector | |
| CN208045502U (en) | Driving mechanism and display device | |
| CN202190458U (en) | Flexible printed circuit board | |
| CN109600910B (en) | Reflective circuit board and manufacturing method thereof | |
| TWI548587B (en) | Method for producing patterned metal nanowire, electrode using the patterned metal nanowire and the transistor using the patterned metal nanowire electrode | |
| CN101042498A (en) | LED backlight unit without printed circuit board and method of manufacturing the same | |
| CN104206032B (en) | The method of attachment of the manufacture method and electronic unit of connector | |
| CN113703223B (en) | Backlight module, preparation method thereof and display panel | |
| CN113759604B (en) | Supporting structure of LED lamp panel and manufacturing method thereof | |
| CN2735377Y (en) | Flip chip structure | |
| TWI225567B (en) | Printed-circuit board connection method and apparatus | |
| CN208738241U (en) | Area source and the display device for using the area source | |
| CN110867508A (en) | PCB (printed circuit board), manufacturing method thereof, lamp panel and display device | |
| CN109307964B (en) | Broken line repairing method, substrate and display device | |
| CN116679480A (en) | Display device and manufacturing method | |
| CN113359363B (en) | Reverse sandwich structure electrochromic gel and preparation method and application thereof | |
| CN218514569U (en) | Anti-bending FPC backlight circuit structure | |
| CN217112973U (en) | Anti-creeping structure for backlight source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |