CN105892165B - Display panel and preparation method thereof - Google Patents

Display panel and preparation method thereof Download PDF

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Publication number
CN105892165B
CN105892165B CN201610483212.9A CN201610483212A CN105892165B CN 105892165 B CN105892165 B CN 105892165B CN 201610483212 A CN201610483212 A CN 201610483212A CN 105892165 B CN105892165 B CN 105892165B
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China
Prior art keywords
adhesive layer
frame sealing
sealing adhesive
display panel
substrate
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Expired - Fee Related
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CN201610483212.9A
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Chinese (zh)
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CN105892165A (en
Inventor
李慧颖
李彬
李鑫
田鹏程
赵德涛
张乐
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Priority to CN201610483212.9A priority Critical patent/CN105892165B/en
Publication of CN105892165A publication Critical patent/CN105892165A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/22—Antistatic materials or arrangements

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The invention relates to the field of display, in particular to a display panel, which comprises a first substrate and a second substrate which are arranged opposite to each other, and a frame sealing adhesive layer which encapsulates the first substrate and the second substrate together, wherein a black matrix graph is arranged on the first substrate or the second substrate, the black matrix graph is provided with a slot, and the frame sealing adhesive layer comprises: a transparent and insulating first frame sealing adhesive layer; and the second sealing frame adhesive layer surrounds the first sealing frame adhesive layer and is opaque and can completely shield the groove of the black matrix pattern. The inner layer of the display panel is a common frame sealing adhesive layer, the periphery of the display panel is wrapped by an opaque frame sealing adhesive layer, and the inner layer of the insulating frame sealing adhesive layer has a protection effect on a substrate circuit. The outer layer of the opaque sealing frame glue layer completely shields the open groove of the black matrix pattern, and light leakage of the position of the black matrix pattern is avoided.

Description

Display panel and preparation method thereof
Technical Field
The invention relates to the field of display, in particular to a display panel and a preparation method thereof.
Background
In the field of flat panel display, the tft-lcd gradually becomes a mainstream product in the field of flat panel display by virtue of its advantages of light weight, thinness, no radiation, low power consumption, etc. The display panel is a main component of the display. The display panel is generally composed of two substrates arranged in a pair of cells, and the two substrates are connected and sealed by a frame sealing adhesive.
Because static gets into behind the display panel, causes the display panel to turn green purple easily, influences the display effect, and still lead to inside to walk the line easily and burn out the fracture, consequently in order to prevent the emergence of these problems, generally use black matrix slotted mode to deal with at present. However, the light shielding strips at the corner positions of the partial module are chamfered, so that the light shielding strips become thin and the light leakage phenomenon is caused.
The frame sealing glue is an important material required in the production of the display panel, can firmly bond the upper substrate and the lower substrate of the display panel, and can play a good role in electrostatic shielding for the full coverage of circuits on the substrates. The frame sealing glue layer obtained after cross-linking and curing of the frame sealing glue is not capable of shading. Especially, after the black matrix is grooved, the light leakage risk is high.
Disclosure of Invention
The invention provides a display panel and a preparation method thereof, wherein the display panel is provided with two sealing frame glue layers, so that the light leakage phenomenon after the grooves are formed on the periphery of a black matrix can be prevented.
The invention discloses a display panel, which comprises a first substrate and a second substrate which are arranged opposite to each other, and a frame sealing adhesive layer which encapsulates the first substrate and the second substrate together, wherein a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot, and the display panel is characterized in that the frame sealing adhesive layer comprises:
a transparent and insulating first frame sealing adhesive layer;
and the second sealing frame adhesive layer surrounds the first sealing frame adhesive layer and is opaque and can completely shield the groove of the black matrix pattern.
Preferably, the second frame sealing adhesive layer is doped with a black conductive material, and the second frame sealing adhesive layer is located on the periphery of the display panel wiring area and is not in contact with the wiring area of the display panel.
Preferably, the black conductive material is carbon nanoparticles, carbon nanotubes, graphene or conductive carbon black.
Preferably, the black conductive material is uniformly distributed in the second frame sealing adhesive layer.
Preferably, the display panel further includes:
and the conductive routing is arranged on the outer side of the second frame sealing adhesive layer and connected with the second frame sealing adhesive layer, and the conductive routing is connected with a low level.
Preferably, the conductive traces are made of Indium Tin Oxide (ITO).
Preferably, the second frame sealing glue layer is doped with a black insulating material prepared by wrapping an insulating layer outside conductive particles, and the insulating layer is SiNx、SiOxOr SiOxNy。
The invention also discloses a preparation method of the display panel, which comprises the following steps:
(1) providing a first substrate and a second substrate; a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot;
(2) coating an insulating and transparent first frame sealing adhesive layer and an opaque second frame sealing adhesive layer surrounding the first frame sealing adhesive layer in a frame sealing adhesive coating area of the first substrate, wherein the second frame sealing adhesive layer completely shields the black matrix from slotting;
(3) and aligning the first substrate and the second substrate, and curing the first frame sealing adhesive layer and the second frame sealing adhesive layer to obtain the display panel.
Preferably, the second frame sealing adhesive layer is doped with a black conductive material, and the second frame sealing adhesive layer is located on the periphery of the display panel wiring area and is not in contact with the wiring area of the display panel.
Preferably, the method further comprises the following steps:
and forming a conductive wire connected with the second frame sealing adhesive layer on the outer side of the second frame sealing adhesive layer, wherein the conductive wire is connected with a low level.
Preferably, the second frame sealing glue layer is doped with a black insulating material.
Compared with the prior art, the inner layer of the display panel is a common frame sealing adhesive layer, the periphery of the display panel is wrapped by an opaque frame sealing adhesive layer, and the inner layer of the insulating frame sealing adhesive layer has a protection effect on the substrate circuit. The outer layer of the opaque sealing frame glue layer completely shields the open groove of the black matrix pattern, and light leakage of the position of the black matrix pattern is avoided. Furthermore, a black conductive material can be added into the non-transparent frame sealing glue layer, so that static electricity generated in later-stage manufacturing and using can be effectively dredged; or black non-conductive materials can be added into the opaque sealing frame glue layer, so that static electricity is effectively prevented from being led in.
Drawings
FIG. 1 is a cross-sectional view of a conventional display panel;
FIG. 2 is a schematic view of a sealant layer structure of the frame;
FIG. 3 is a cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic view of a frame sealing adhesive coating apparatus;
FIG. 5 is a schematic diagram of an electrostatic discharge path of a display panel according to the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
Fig. 1 is a cross-sectional view of a conventional display panel. In fig. 1, 11 is an upper polarizer, 12 is an ITO thin film, 13 is a first substrate, 14 is a black matrix pattern groove, 15 is a black matrix, 16 is a frame sealing adhesive layer, 17 is a metal, 18 is a second substrate, and 19 is a lower polarizer.
The invention discloses a display panel, which comprises a first substrate and a second substrate which are arranged opposite to each other, and a frame sealing adhesive layer which encapsulates the first substrate and the second substrate together, wherein a black matrix graph is arranged on the first substrate or the second substrate, the black matrix graph is provided with a slot, and the frame sealing adhesive layer comprises:
a transparent and insulating first frame sealing adhesive layer;
and the second sealing frame adhesive layer surrounds the first sealing frame adhesive layer and is opaque and can completely shield the groove of the black matrix pattern.
Fig. 2 is a schematic view of a sealant layer structure of the sealing frame. In fig. 2, 21 is a first substrate or a second substrate, 22 is a first frame sealing adhesive layer, and 23 is a second frame sealing adhesive layer.
Fig. 3 is a cross-sectional view of a display panel according to an embodiment of the invention. In fig. 3, 11 is an upper polarizer, 12 is an ITO thin film, 13 is a first substrate, 14 is a black matrix pattern groove, 15 is a black matrix, 23 is a second frame sealing adhesive layer, 22 is a first frame sealing adhesive layer, 17 is a metal, 18 is a second substrate, and 19 is a lower polarizer.
The key point of the invention is that the frame sealing glue layer for packaging the first substrate and the second substrate is divided into two layers, namely a transparent and insulating first frame sealing glue layer and an opaque second frame sealing glue layer surrounding the first frame sealing glue layer. The first frame sealing glue layer is obtained by curing common existing frame sealing glue, is transparent light yellow, does not have shading capability, but has good insulating property, completely covers the wiring area of the display panel, and ensures the insulativity of the wiring area. The second frame sealing glue layer is obtained by curing opaque frame sealing glue, and shading substances can be doped in the common existing frame sealing glue. The addition amount of the shading substance is 10-20% of the mass of the second frame sealing glue layer. The smaller the particle size of the light shielding material is, the better the particle size is, and the uniformity of the second frame sealing glue layer can be ensured.
The display panel of the present invention may be a liquid crystal display panel, or may be another type of display panel, and therefore, the present invention is not particularly limited to the types of the first substrate and the second substrate. When the display panel is a liquid crystal display panel, the first substrate is a color film substrate, and the second substrate is an array substrate; or the first substrate is an array substrate, and the second substrate is a color film substrate.
The manufacturing method of the display panel at least comprises the following steps except other necessary manufacturing procedures:
(1) providing a first substrate and a second substrate; a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot;
(2) coating an insulating and transparent first frame sealing adhesive layer and an opaque second frame sealing adhesive layer surrounding the first frame sealing adhesive layer in a frame sealing adhesive coating area of the first substrate, wherein the second frame sealing adhesive layer completely shields the black matrix from slotting;
the first frame sealing adhesive layer and the second frame sealing adhesive layer can be coated at the same time or not;
(3) and aligning the first substrate and the second substrate, and curing the first frame sealing adhesive layer and the second frame sealing adhesive layer to obtain the display panel.
The above-described specific substrate manufacturing method can be manufactured by a conventional method.
The frame sealing glue layer is preferably coated by using a frame sealing glue coating device, as shown in fig. 4.
The frame sealing glue coating device comprises:
a first storage chamber 41 for storing the transparent insulating frame sealing glue;
a second storage chamber 42 for storing the opaque frame sealing glue;
a spout 43 communicating with the first storage chamber 41 and the second storage chamber 42, respectively;
and the pressure control device 44 is respectively connected with the first storage cavity 41 and the second storage cavity 42 and is used for controlling the outflow flow of the frame sealing glue.
In the embodiment of the present invention, preferably, the second frame sealing adhesive layer is doped with a black conductive material. The black conductive material may be carbon nanoparticles, carbon nanotubes, graphene or conductive carbon black, preferably carbon nanoparticles. Preferably, the black conductive material is uniformly distributed in the second frame sealing adhesive layer, so that the second frame sealing adhesive layer is uniform, and the shading effect is good. The adding mass of the black conductive material is 10-20% of the mass of the second frame glue layer. Due to the doping of the black conductive material, the second seal frame adhesive layer is located on the periphery of the wiring area of the display panel and is not in contact with the wiring area of the display panel, so that static electricity is prevented from being led in.
Because the black conductive material is doped, the conductive capability of the frame sealing adhesive is also increased, and the risk that static electricity enters the display panel through the frame sealing adhesive exists, preferably, in the embodiment of the present invention, the display panel further includes:
and the conductive routing is arranged on the outer side of the second frame sealing adhesive layer and connected with the second frame sealing adhesive layer, and the conductive routing is connected with a low level.
In this embodiment, the static electricity in the second frame sealing adhesive layer is led out of the display panel through the conductive traces. The conductive wire is preferably made of Indium Tin Oxide (ITO). The low level may be a conductive PAD or the like in the display device as long as the static electricity can be conducted out. A specific electrostatic derivation path can be seen in fig. 5. In fig. 5, 51 is the second frame sealing adhesive layer, 52 is the ITO conductive trace, 53 is the conductive PAD, and 54 is the silver paste.
In this embodiment, because the addition of black conductive particle, light can't pass through, can effectively shelter from the light leak of black matrix pattern draw-in groove position, simultaneously, first frame glue film has the guard action to the base plate circuit, and second frame glue film has the mediation effect to display panel post manufacture, the static in the use, consequently, the display panel of this embodiment not only can avoid the light leak, can also be quick effectual derive display panel with static, has promoted display panel's antistatic effect. The related display panel does not additionally increase the line width of the substrate, does not influence the frame width of the display panel, does not need to additionally increase equipment, and saves cost.
The preparation method of the display panel comprises the following steps:
(1) providing a first substrate and a second substrate; a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot;
(2) doping a black conductive material in the second frame sealing glue layer; the black conductive material is carbon nanoparticles, carbon nanotubes, graphene or conductive carbon black, and preferably carbon nanoparticles; the adding amount of the black conductive material is 10-20% of the mass of the second frame sealing adhesive layer;
coating an insulating and transparent first frame sealing adhesive layer and an opaque second frame sealing adhesive layer surrounding the first frame sealing adhesive layer in a frame sealing adhesive coating area of the first substrate, wherein the second frame sealing adhesive layer completely shields the black matrix from slotting; the second frame sealing adhesive layer is positioned at the periphery of the wiring area of the display panel and is not contacted with the wiring area of the display panel;
(3) forming a conductive wire connected with the second frame sealing adhesive layer on the outer side of the second frame sealing adhesive layer, wherein the conductive wire is connected with a low level;
(4) and aligning the first substrate and the second substrate, and curing the first frame sealing adhesive layer and the second frame sealing adhesive layer to obtain the display panel.
Alternatively, in the embodiment of the present invention, a black insulating material may be doped in the second frame sealing adhesive layer. The variety of the black insulating materials is various, the preferred black insulating material is prepared by wrapping transparent insulating layers on the peripheries of black conductive particles, and the insulating layers are SiNx、SiOxOr SiOxNy(ii) a In addition, for example, a black insulating material such as a black epoxy resin or a black near-epoxy resin may be used, and the present invention is not particularly limited. The adding mass of the black insulating material is 10-20% of the mass of the second frame glue layer. The doping of the black insulating material can prevent the black matrix pattern from being transparent, and the insulating property of the black insulating material can reduce the probability that static electricity enters the display panel from the frame sealing glue layer, so that the antistatic effect is achieved.
The preparation method of the display panel comprises the following steps:
(1) providing a first substrate and a second substrate; a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot;
(2) doping a black insulating material in the second frame sealing glue layer; the black insulating material is SiNxThe insulating layer is coated with carbon nano particles;
the adding amount of the black insulating material is 10-20% of the mass of the second frame sealing adhesive layer;
coating an insulating and transparent first frame sealing adhesive layer and an opaque second frame sealing adhesive layer surrounding the first frame sealing adhesive layer in a frame sealing adhesive coating area of the first substrate, wherein the second frame sealing adhesive layer completely shields the black matrix from slotting;
(3) and aligning the first substrate and the second substrate, and curing the first frame sealing adhesive layer and the second frame sealing adhesive layer to obtain the display panel.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The utility model provides a display panel, includes first base plate and the second base plate that sets up the box to and the frame sealing glue film with first base plate and second base plate encapsulation together, be provided with black matrix figure on first base plate or the second base plate, black matrix figure is provided with the fluting, its characterized in that, the frame sealing glue film includes:
a transparent and insulating first frame sealing adhesive layer;
the second sealing frame adhesive layer surrounds the first sealing frame adhesive layer and is opaque, and the second sealing frame adhesive layer can completely shield the open slot of the black matrix graph; the second frame sealing adhesive layer is doped with a black conductive material, the second frame sealing adhesive layer is located on the periphery of the display panel wiring area and is not in contact with the wiring area of the display panel, and the addition amount of the black conductive material is 10-20% of the quality of the second frame sealing adhesive layer.
2. The display panel of claim 1, wherein the black conductive material is carbon nanoparticles, carbon nanotubes, graphene, or conductive carbon black.
3. The display panel according to claim 2, wherein the black conductive material is uniformly distributed in the second frame sealing adhesive layer.
4. The display panel according to claim 1, characterized in that the display panel further comprises:
and the conductive routing is arranged on the outer side of the second frame sealing adhesive layer and connected with the second frame sealing adhesive layer, and the conductive routing is connected with a low level.
5. The display panel of claim 4, wherein the conductive traces are made of indium tin oxide.
6. A preparation method of a display panel comprises the following steps:
(1) providing a first substrate and a second substrate; a black matrix pattern is arranged on the first substrate or the second substrate, and the black matrix pattern is provided with a slot;
(2) coating an insulating and transparent first frame sealing adhesive layer and an opaque second frame sealing adhesive layer surrounding the first frame sealing adhesive layer in a frame sealing adhesive coating area of the first substrate, wherein the second frame sealing adhesive layer completely shields the black matrix from slotting; the second frame sealing adhesive layer is doped with black conductive materials, is positioned at the periphery of the wiring area of the display panel and is not in contact with the wiring area of the display panel, and is formed with conductive wirings connected with the second frame sealing adhesive layer, wherein the conductive wirings are connected with a low level; the adding amount of the black conductive material is 10-20% of the mass of the second frame sealing adhesive layer;
(3) and aligning the first substrate and the second substrate, and curing the first frame sealing adhesive layer and the second frame sealing adhesive layer to obtain the display panel.
CN201610483212.9A 2016-06-27 2016-06-27 Display panel and preparation method thereof Expired - Fee Related CN105892165B (en)

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Publication number Priority date Publication date Assignee Title
CN109143693A (en) * 2018-09-28 2019-01-04 深圳市华星光电半导体显示技术有限公司 A kind of liquid crystal display panel and preparation method thereof

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CN102495493A (en) * 2011-12-02 2012-06-13 深圳市华星光电技术有限公司 Manufacturing method for liquid crystal panel, liquid crystal panel and liquid crystal display device
CN105242446A (en) * 2015-11-09 2016-01-13 深圳市华星光电技术有限公司 Manufacturing method for liquid crystal display panel

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JP2010256409A (en) * 2009-04-21 2010-11-11 Mitsubishi Electric Corp Liquid crystal display device
KR102024778B1 (en) * 2012-11-23 2019-09-24 엘지디스플레이 주식회사 Black sealant composition, display device comprising the same and method of manufacturing for the display device
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JP2831487B2 (en) * 1991-03-14 1998-12-02 アルプス電気株式会社 Liquid crystal display device
JP2003149658A (en) * 2001-11-13 2003-05-21 Matsushita Electric Ind Co Ltd Liquid crystal display element
JP2008139555A (en) * 2006-12-01 2008-06-19 Sharp Corp Liquid crystal display device and its manufacturing method
CN102495493A (en) * 2011-12-02 2012-06-13 深圳市华星光电技术有限公司 Manufacturing method for liquid crystal panel, liquid crystal panel and liquid crystal display device
CN105242446A (en) * 2015-11-09 2016-01-13 深圳市华星光电技术有限公司 Manufacturing method for liquid crystal display panel

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