CN104345501A - Method for preparing narrow-side display device - Google Patents
Method for preparing narrow-side display device Download PDFInfo
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- CN104345501A CN104345501A CN201310337313.1A CN201310337313A CN104345501A CN 104345501 A CN104345501 A CN 104345501A CN 201310337313 A CN201310337313 A CN 201310337313A CN 104345501 A CN104345501 A CN 104345501A
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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
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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
-
- 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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
-
- 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
- G02F1/13398—Spacer materials; Spacer properties
-
- 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
- G02F2202/02—Materials and properties organic material
- G02F2202/022—Materials and properties organic material polymeric
- G02F2202/023—Materials and properties organic material polymeric curable
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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)
Abstract
The invention provides a method for preparing a narrow-side display device. The method comprises the steps of performing radiation treatment on a polyimide film positioned at a sealing position of a substrate, and enabling the polyimide film positioned at the sealing position of the substrate to generate a free radical; coating the sealing position with frame sealing glue and curing. By performing radiation treatment on the polyimide film, surface groups of the polyimide film conduct cracking reaction to generate the free radical; the free radical and active groups of the frame sealing glue mutually react, so that the bonding strength is improved, and the conditions of liquid crystal puncture, liquid crystal pollution and poorer reliability are avoided.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of method preparing narrow frame display device.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has become the main product in current flat-panel monitor because of features such as its volume are little, low in energy consumption, radiationless, and day by day strengthens requirement that is slim, lightweight.
The narrow frame design of display device is a trend of display field development.Current TFT-LCD (thin film transistor (TFT) LCD) shows the narrow frame design method of product, mostly adopts the mode of polyimide film (PI film) overlapping with sealed plastic box (Seal) (Overlap) to realize.But, due to PI film and sealed plastic box cohesiveness poor, easy generation reliability aspect bad, pollution precipitate that is as weak in cohesive force, that cause because of poor compatibility and the image retention problem produced, final PI film and the uncontrollable factor of sealed plastic box cause narrow frame to be difficult to reach the designing requirement of ideal product.And adopt the narrow frame design of PI film and the nonoverlapping mode of sealed plastic box, although avoid above-mentioned problem, the method can not realize narrow frame to greatest extent.So PI film is overlapping with sealed plastic box is a best solution, and the cohesiveness improving PI film and sealed plastic box is also a new problem.
The method realizing narrow frame of current usual employing directly on PI film, applies sealed plastic box overlappingly, after solidification, form involution.But it is poor to adopt the sealing strength obtained in this way, easily there is the problems such as the puncture of liquid crystal, the precipitation of pollutant, reliability be bad.
Summary of the invention
For this reason, the present invention aims to provide a kind of method preparing ultra-narrow frame display device, and the design basis not changing display device utilizes the mode of radiation modification, between sealed plastic box and PI film, achieve stronger cohesiveness.The PI film mode overlapping with sealed plastic box can be effectively utilized to achieve the preparation of the narrow frame display device of 6 ~ 11mm according to method of the present invention, the problem such as the puncture of liquid crystal, the precipitation of pollutant, reliability can be prevented again bad.
The object of this invention is to provide a kind of method preparing narrow frame display device, described method comprises:
Irradiation treatment is positioned at the polyimide film of the involution position of substrate, and the polyimide film being positioned at the involution position of substrate described in making produces free radical;
Sealed plastic box is coated in described involution position, and is cured.
Wherein, described polyimide film has and is selected from-COO-,-OH and-NH
2the first reactive group, preferably there is-the COO-be positioned on side chain.
Described sealed plastic box has and is selected from-COOH ,-OH and-NH
2the second reactive group.
According to an embodiment of the invention, the radiation source that described irradiation treatment launches linear ultraviolet light carries out.Described radiation source carries out irradiation treatment by the involution position of radiation light shield to described substrate.By regulating the distance between described radiation light shield and described substrate, make the light transmission part of described radiation light shield and the involution aligned in position of described substrate.
The wavelength of described linear ultraviolet light is preferably 254nm and/or 313nm.
In the method according to the invention, the intensity of described linear ultraviolet light can be 1.0 ~ 4.0J/cm
2.
According to an embodiment of the invention, there is cracking and produce free radical in described first reactive group after radiation.When carrying out described curing schedule, the second reactive group of described free radical and described sealed plastic box forms chemical bonding.
Described substrate is array base palte or color membrane substrates.
According to another embodiment of the present invention, described method carries out orientation process to described polyimide film before being included in and carrying out described irradiation treatment step.
In the method for the narrow frame display device of preparation provided by the invention, radiation modification is carried out to the PI film surface molecules in sealed plastic box coating zone (involution position), the free radical that its cracking produces and polarity can reach good wellability and adsorbability before curing with the reactive group of sealed plastic box component, the chemical bonding of PI film-sealed plastic box can be there is again when solidifying, its intramolecule bonding force produced much larger than intermolecular force, thus realizes the enhancing of cohesive strength between polyimide film and sealed plastic box.By said method, the preparation of the narrow frame display device of 6 ~ 11mm can be realized, and ensure its good display performance and stability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram overlapping with sealed plastic box according to the polyimide film of narrow frame display device of the present invention;
Fig. 2 is the structural representation according to radiation light shield used in method of the present invention;
Fig. 3 is schematic diagram polyimide film being carried out to radiation modification according to embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing of the embodiment of the present invention, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of protection of the invention.
The invention provides a kind of method preparing narrow frame display device, comprising: irradiation treatment is positioned at the polyimide film of the involution position of substrate, the polyimide film being positioned at the involution position of substrate described in making produces free radical; Then sealed plastic box is coated in described involution position, and is cured, now the free radical of polyimide film and the reactive group of sealed plastic box react, and make to produce stronger cohesive force between polyimide film and sealed plastic box.
Fig. 1 shows the obtained narrow frame display panel of the method employing PI film according to the present invention mode overlapping with sealed plastic box, does not wherein have distance restraint between PI film and sealed plastic box, can effectively reduce frame area.
In the method according to the invention, aforesaid substrate can be the substrate being formed with array pattern or color film pattern on such as glass substrate or the transparency with the plastic base had good stability, i.e. array base palte or color membrane substrates.
In the above-mentioned methods, after utilizing conventional method for alignment (such as friction treatment) to make to be coated in the polyimide film orientation on substrate, the substrate through orientation is positioned on objective table.Objective table can be placed in radiating enclosures.This radiating enclosures can carry out the process vacuumizing or be filled with inert gas.
The radiation light shield for limiting radiation areas is furnished with above objective table.The light screening material with specific transmission region that radiation light shield can be commonly used for this area.As shown in Figure 2, the shading light part 1 of radiation light shield can be sheet metal, or opaque plastic plate, or other any shelters that can block radiate source radiation.And the light transmission part 2 of radiation light shield, be then the material of the ray can launched through radiation source, as glass, transparent plastic etc.
Rotatable stage makes the substrate of process to be irradiated be in the position corresponding with radiation light shield, and namely light transmission part 2 is corresponding with the involution position of substrate, and shading light part 1 is corresponding with the graphics field of substrate.The substrate of fixing process to be irradiated.
Regulate the distance between radiation light shield and the substrate of process to be irradiated, and make them carry out contraposition, make the involution position of substrate and the printing opacity aligned in position of radiation light shield.This contraposition process is carried out thick contraposition, then is carried out thin contraposition after generally including and making radiation light shield drop to certain position.Then, use Electron microscopy alignment, and finely tune.
Fig. 3 shows the schematic diagram of radiation modification polyimide film, wherein in radiation light shield, radiation useful area is (namely, the area of each light transmission part) W1, area W ' 1 to be irradiated, the W ' 2 of W2, W3 and PI film, pass between W ' 3 be, W1 > W ' 1, W2 > W ' 2, W3 > W ' 3.
The ray of the side that radiation source sends by the offside reflection plate being positioned at two ends reflects, and then guarantees to carry out radiation modification to the side of substrate.
In said method, the distance between the substrate of radiation light shield and process to be irradiated can preset as required, specifically can determine according to the radiation areas area of the constituent of PI film and PI film.If the radiation areas area of PI film is large, then default distance is set to less; If the radiation areas area of PI film is little, then default distance is set to larger.
Above-mentioned radiation source can the radiation areas of control PI film by the angle range of its movement.Radiation source can launch the electromagnetic wave of various wavelength, such as the laser of visible ray, ultraviolet, X ray, gamma-rays and different wave length, alpha ray, β ray and neutron ray etc.The number of radiation source can be one or more, adjusts according to actual needs.
Preferably there is the device of linear ultraviolet light in above-mentioned radiation source.The track of its motion is that tangential movement speed can be 20 ~ 50mm/s with the two ends of substrate for tangential movement scope.Simultaneously radiation source also centered by vertical direction line carry out the motion of-30 ° ~ 30 °, angular velocity can be 0-30 °/s.
Wherein, the intensity of above-mentioned linear ultraviolet light can be arranged according to the composition of PI film, such as, can be 1.0 ~ 4.0J/cm
2(254nm wavelength), or 1.0 ~ 4.0J/cm
2(313nm wavelength).
Above-mentioned polyimide film can have and is selected from-COO-,-OH and-NH
2the first reactive group, preferably there is-the COO-be positioned on side chain.Can there is cracking through the irradiation treatment of above-mentioned radiation source in above-mentioned first reactive group, generate free radical.
Above-mentioned sealed plastic box can have and is selected from-COOH ,-OH and-NH
2the second reactive group.
After irradiation treatment, by radiation source reversion original position, radiation light shield rises to initial position, and the substrate through irradiation treatment is transferred out radiating enclosures.
Then, sealed plastic box is coated on the involution position of the substrate of irradiation treatment, and carries out box, solidification (such as UV solidification or heat curing).Now, the second reactive group has good wetting property with the free radical produced by the first reactive group, and can form intramolecular chemical bonding.Thus, good adhesive property is obtained.
Such as, when the side chain of polyimide film contains ester group, during irradiation treatment, following cracking reaction can be there is:
When UV solidification or heat curing, easily there is bonding with the second reactive group (such as-COOH) in the free radical generated, thus realizes the high strength bond of sealed plastic box and PI film, prevents the puncture of liquid crystal and the precipitation of pollutant.
Adopt the method for the invention described above to carry out the display device of involution, following technology and economic effect can be realized:
(1) by radioreaction, the surface group generation cracking reaction of PI film, the reactive group of itself and sealed plastic box reacts to each other, and then increases cohesive strength, and the situation avoiding liquid crystal puncture, liquid crystal pollution, reliability poor occurs.
(2) because sealed plastic box is only coated in the involution position of PI layer, decrease the use amount of sealed plastic box compared with traditional approach, and can not cohesive strength be reduced, do not affect the reliability of display device.
(3) design changing display device is avoided, decrease development cost, only change from manufacturing process, the equipment that its equipment applied to and current UV solidify simultaneously has larger matching, decrease the input in scrap build, there is larger cost performance.
Embodiment
For PI liquid (polyimide AL-00010), radiation modification is carried out to it.
Adopt this area conventional method, above-mentioned PI liquid is coated on array base palte and forms PI film, and through friction orientation process.Array base palte through orientation process is placed on the objective table in radiation precursor.Rotatable stage, and regulate radiation light shield position, alignd with the light transmission part of radiation light shield in the processing section to be irradiated of array base palte (involution position).
Wherein, radiation source is uviol lamp, and the wavelength of the linear ultraviolet light sent is 254nm, and radiation intensity is 1.0J/cm
2.
The radiation modification process of above-mentioned PI film is as shown in following signal formula:
The cracking reaction of ester group on the side chain of a.PI film
PI film is after radiation modification, mainly there is cracking with cracking mode 1 in the reactive group (that is, the ester group be positioned on side chain of arrow indication) in its structure, generates free radical derivant 1, also there is a small amount of cracking mode 2 routinely that cracking occurs simultaneously, generate free radical derivant 2.
Acrylate sealed plastic box (WB73 is example) is coated in the involution position of the above-mentioned array base palte through irradiation treatment, and carries out the technique such as box, ultra-violet curing with color membrane substrates routinely, obtained liquid crystal indicator.In the curing process, between the PI film and sealed plastic box of radiation modification, following bonding process is carried out:
B. the solidification process of sealed plastic box
Surface molecular after c.PI membrane modifying and sealed plastic box generation bonding (for derivant 1).
By said method, PI film and sealed plastic box are no longer bond in traditional mode based on intermolecular force, but the bonding force being converted into dependence chemical bond bonds.Therefore, the cohesive action between PI film and sealed plastic box occurs obviously to strengthen.
Adopt above same procedure, irradiation treatment can be carried out to the PI film on color membrane substrates, the good involution between PI film on color membrane substrates and sealed plastic box can be realized equally.Through conventional to the technique such as box and solidification, obtained reliability, the better display device of stability thus.
The evaluation of cohesive strength
Adopt the glass substrate of thickness 0.4T, PI liquid is polyimide AL-00010, sealed plastic box is WB-73, and glue is wide is 0.7mm, adopts the method for above embodiment (wherein respectively through irradiation treatment with without irradiation treatment) to form the sealing structure of PI film and sealed plastic box.Measure stripping (peel off) data of 4.5 inches of gained sealing structure, wherein Average peel force >=the 1.25kgf of left side binding part (pad) and the right binding part (pad) is OK, otherwise NG.
| Sample | Non-radiation modification | Radiation modification |
| Left side binding part (kgf) | 1.02 | 1.68 |
| The right binding part (kgf) | 1.09 | 1.60 |
| Evaluation result | NG | OK |
Can be found out by above result, through the sealing method of irradiation treatment, the cohesive strength obviously strengthened can be obtained.The above is only exemplary embodiment of the present invention, but not for limiting the scope of the invention, protection scope of the present invention is determined by appended claim.
Claims (13)
1. prepare a method for narrow frame display device, it is characterized in that, described method comprises:
Irradiation treatment is positioned at the polyimide film of the involution position of substrate, and the polyimide film being positioned at the involution position of substrate described in making produces free radical;
Sealed plastic box is coated in described involution position, and is cured.
2. the method for the narrow frame display device of preparation according to claim 1, is characterized in that, described polyimide film has and is selected from-COO-,-OH and-NH
2the first reactive group.
3. the method for the narrow frame display device of preparation according to claim 1, is characterized in that, described sealed plastic box has and is selected from-COOH ,-OH and-NH
2the second reactive group.
4. the method for the narrow frame display device of preparation according to claim 1, is characterized in that, described polyimide film has the-COO-be positioned on side chain.
5. the method for the narrow frame display device of preparation according to claim 1, is characterized in that, the radiation source that described irradiation treatment launches linear ultraviolet light carries out.
6. the method for the narrow frame display device of preparation according to claim 5, is characterized in that, the wavelength of described linear ultraviolet light is 254nm, or 313nm, or 254nm and 313nm.
7. the method for the narrow frame display device of preparation according to claim 6, is characterized in that, the intensity of described linear ultraviolet light is 1.0 ~ 4.0J/cm
2.
8. the method for the narrow frame display device of preparation according to claim 2, is characterized in that, described first reactive group produces free radical after radiation.
9. the method for the narrow frame display device of preparation according to claim 8, is characterized in that, when carrying out described curing schedule, the second reactive group of described free radical and described sealed plastic box forms chemical bonding.
10. the method for the narrow frame display device of preparation according to claim 1, is characterized in that, described substrate is array base palte or color membrane substrates.
The method of the narrow frame display device of 11. preparation according to claim 1, is characterized in that, described method carries out orientation process to described polyimide film before being included in and carrying out described irradiation treatment step.
The method of the narrow frame display device of 12. preparation according to claim 5, is characterized in that, described radiation source carries out irradiation treatment by the involution position of radiation light shield to described substrate.
The method of the narrow frame display device of 13. preparation according to claim 12, is characterized in that, by regulating the distance between described radiation light shield and described substrate, makes the light transmission part of described radiation light shield and the involution aligned in position of described substrate.
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| CN201310337313.1A CN104345501B (en) | 2013-08-05 | 2013-08-05 | The method for preparing narrow frame display device |
| PCT/CN2013/089143 WO2015018155A1 (en) | 2013-08-05 | 2013-12-11 | Method for manufacturing display apparatus |
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|---|---|---|---|
| CN201310337313.1A CN104345501B (en) | 2013-08-05 | 2013-08-05 | The method for preparing narrow frame display device |
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| CN104345501B CN104345501B (en) | 2018-01-19 |
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| CN105700208A (en) * | 2016-04-13 | 2016-06-22 | 京东方科技集团股份有限公司 | Method for manufacturing display panel, display panel and display device |
| CN107884995A (en) * | 2017-12-22 | 2018-04-06 | 深圳市华星光电技术有限公司 | Display panel |
| CN110426877A (en) * | 2019-07-08 | 2019-11-08 | 深圳市华星光电技术有限公司 | A kind of narrow frame display panel and preparation method thereof, narrow frame display device |
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| US20180203304A1 (en) * | 2016-04-13 | 2018-07-19 | Boe Technology Group Co., Ltd. | Method for manufacturing display panel, display panel and display apparatus |
| CN105700208B (en) * | 2016-04-13 | 2019-07-05 | 京东方科技集团股份有限公司 | A kind of method for manufacturing display panel, display panel and display device |
| CN107884995A (en) * | 2017-12-22 | 2018-04-06 | 深圳市华星光电技术有限公司 | Display panel |
| CN107884995B (en) * | 2017-12-22 | 2021-06-22 | 苏州华星光电技术有限公司 | Display panel |
| CN110426877A (en) * | 2019-07-08 | 2019-11-08 | 深圳市华星光电技术有限公司 | A kind of narrow frame display panel and preparation method thereof, narrow frame display device |
| CN111176022A (en) * | 2020-03-12 | 2020-05-19 | Tcl华星光电技术有限公司 | Display panel, preparation method thereof and display device |
| CN111176022B (en) * | 2020-03-12 | 2022-02-22 | Tcl华星光电技术有限公司 | Display panel, preparation method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104345501B (en) | 2018-01-19 |
| WO2015018155A1 (en) | 2015-02-12 |
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