CN106784383A - The OLED encapsulated with the cover plate for having Back Word connected in star - Google Patents
The OLED encapsulated with the cover plate for having Back Word connected in star Download PDFInfo
- Publication number
- CN106784383A CN106784383A CN201710007656.XA CN201710007656A CN106784383A CN 106784383 A CN106784383 A CN 106784383A CN 201710007656 A CN201710007656 A CN 201710007656A CN 106784383 A CN106784383 A CN 106784383A
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- Prior art keywords
- cover plate
- groove
- oled
- star
- substrate
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a kind of OLED encapsulated with the cover plate for having Back Word connected in star, OLED structure, cover plate, packaging plastic and liquid drier including substrate, evaporation on substrate, have on the inside of packaging plastic at least one circle groove on cover plate, liquid desiccant be filled between substrate and cover plate be packaged glue around including the space including groove.The OLED encapsulated with the cover plate for having Back Word connected in star of the invention, sets at least one and encloses groove in cover plate surrounding, and groove is located proximate to lateral location, on the only way which must be passed when steam enters device inside through packaging plastic, can quickly catch steam;Back Word connected in star is provided places the more spaces of liquid drier, it is ensured that can adsorb more steam.
Description
Technical field
The present invention relates to organic electroluminescence device technical field, more particularly to a kind of cover plate for having Back Word connected in star is sealed
The OLED of dress.
Background technology
Organic electroluminescence device(OLED)So that its energy-conservation, health, frivolous, environmentally friendly, self-luminous, response time be short, structure
Simply, the advantages such as flexibility are capable of achieving, are paid close attention to by increasing scholar and enterprise in illumination and display field, development prospect
It is wide.
The construction of OLED generally comprises a substrate, and two membrane electrode poles have been made on substrate, in two electricity
Multilayer organic film is made between pole, device can light after being powered between two electrodes.The most frequently used substrate is clear glass
Do, the light that device is sent out after being powered injects air as used by display or illumination through glass substrate, and these are referred to as bottom and light
Device.Also some devices just send from device side, and these are called top illuminating device.Due to organic material that OLED is used
Material and electrode material are easily damaged by the water in air, oxygen attack, OLED structure packaging protection must be got up during making, are made
OLED and atmospheric isolation.A kind of conventional method for packing is around OLED structure(202)Use packaging plastic(203)Having on one
Groove(205)Encapsulation cover plate(204)It is pasted onto substrate(201)On sealed(Fig. 2), groove mentioned here(205)It is
With chemical etching or other method from cover plate(204)It is a piece of less than original lid surface that surface is removed some thickness and formed
Partly;Groove(205)Position face OLED(202)And the area of groove is more than OLED structure, OLED knots after encapsulation
Structure and groove(205)Bottom is not in contact, and one is remained between them is vacuum or is filled with inert gas
Space(206).Groove(205)There are two major functions, one is to avoid device from being contacted with cover plate, because directly contact can be damaged
Evil organic layer, causes the short circuit of device;Another function is one space of formation between substrate and cover plate, can be added wherein
Enter drier(207)Draw the aqueous vapor penetrated into from packaging plastic;Because groove(205)There is suitable depth, typically in 200-300u,
Drier(207)Amount can put it is quite big, what OLED products were commonly used at this stage is solid paster drier(207)Its
In water absorbing agent be usually alkaline-earth metal oxide solid particle, space(206)Presence also cause drier(207)Can be with
Absorb the packaging plastic from any one position(203)The moisture for penetrating, increases device lifetime., although this encapsulation technology
Successfully it is used for many years, but with the increase of panel size, substrate or cover plate will easily be compressed deformation and lead in use
Cause paster drier to touch device surface, seriously damage device.And, because drying agent chip is not transparent, this encapsulation
Technology cannot be used in top illuminating device or transparent devices;On the other hand, because sealing space is vacuum or inert gas,
The heat that OLED is produced when working is difficult to conduct and cause device temperature too high.This can also influence efficiency and the reduction of device
The life-span of device.To solve these problems, another encapsulation technology is also used, and this encapsulation technology is no groove
Flat board cover plate(Fig. 3), in packaging plastic(303)In circle, substrate(301)And cover plate(304)Between space(306)It is filled with liquid
The drier of state, the general viscosity of liquid desiccant used is very high, and its effect is to have isolated substrate and cover plate so that they are not
Easily because of glass extruding, directly contact causes the damage of device.Simultaneously as the thermal conductivity of liquid preferably, is produced when device is luminous
Heat energy be easier to spread out of, reduce temperature when device runs, therefore increased efficiency and the life-span of device.Liquid is dried
Agent can also make transparent so that this technology can be applied on luminous or transparent devices are pushed up.But this technology also has it
Problem, mainly when aqueous vapor is penetrated into via packaging plastic, only the drier in outmost turns, directly contact packaging plastic has water suction
Function.And because there is no groove, space with flat board cover plate(306)It is very small, only packaging plastic(303)Solidified by compression
Thickness afterwards, typically in below 20um, the capacity very little of unit area drier, and the water absorption of drier is limited, quickly
Just by water saturation, aqueous vapor goes successively to the region being saturated to be gradually increased to the drier of outer ring, causes the periphery of device to produce
Stain, even black surround, short circuit.Because liquid desiccant is very expensive, space is increased with groove cover plate or other method(306)Come
Improve waterproof effect unactual.
The content of the invention
It is an object of the invention to provide the OLED encapsulated with the cover plate for having Back Word connected in star, the encapsulating structure for being used
Groove encapsulation is assembled(Fig. 2)And flat panel enclosure(Fig. 3)Advantage, but eliminate their shortcoming, extend the use of device
Life-span.
To achieve the above object, the invention provides a kind of OLED encapsulated with the cover plate for having Back Word connected in star, bag
Include substrate, the OLED structure being deposited with substrate, the cover plate for having back-shaped groove, packaging plastic and be filled between substrate and cover plate empty
Between liquid drier, the packaging plastic forms a three-back-shaped corral remained silent and is wound on around OLED structure, and the envelope
The upper surface substrate of glue is filled, lower surface contact cover plate forms a sealing ring, there is at least one on cover plate on the inside of packaging plastic
The back-shaped groove of circle, less than the 1/10 of OLED structure width, liquid desiccant is filled between substrate and cover plate the width of groove
Packed glue around including the space including groove.It facing to OLED structure is do not have reeded portion on cover plate that main points are
Part, therefore space between OLED structure and cover plate is very small, is compression solidification post package glue<The thickness of 20um, thus it is few
The liquid desiccant of amount can be covered with being filled with whole OLED structure, greatly reducing production cost, and periphery is back-shaped recessed
Groove depth is more than 100um, contains larger amount of drier, because the use of the infiltration of middle aqueous vapor being existed via the packaging plastic of periphery
The relatively large drier for having to pass through groove and being stored in groove before OLED structures cause damage is reached to be absorbed, from
And packaging effect is greatly improved, improve the life-span of OLED.Because groove is very narrow, what is generally increased dries dosage not
Greatly, production cost is also reduced.The OLED encapsulated with the cover plate for having Back Word connected in star of the invention, is set in cover plate surrounding
At least one circle groove, and groove is located proximate to lateral location, and Back Word connected in star is located at the edge of device, so most of
The luminous zone of OLED is not face groove, on the only way which must be passed when steam enters device inside through packaging plastic, can
Quickly to catch steam;Back Word connected in star is provided places the more spaces of liquid drier, it is ensured that can adsorb more
Steam.
Wherein, OLED structure is illuminating device or display device.
Substrate is clear glass, and the cover plate for taking back font groove is also clear glass, and liquid drier is transparent, if
OLED devices are transparency electrodes, so that it may make transparent OLED devices.Preferably, the width of groove is 0.5mm-2.0mm,
The depth of groove is in 0.05 mm-0.3mm;The width of outside groove is more than the width of inboard groove, and the depth of outside groove is more than
The depth of inboard groove.And the inner edge of most inboard groove is overlap with luminous zone to be no more than 0.2mm, each of which groove
Outer ledge may be configured as inclining 0 ° -45 ° laterally from top to bottom.
The width and depth of groove can do appropriate regulation according to device actual size, shape.General plate glass encapsulation
When gap between substrate and cover plate be about 15 millimeters, any depth of groove can all increase the amount of efficient drying agent because
General cover sheet thickness in 0.5-1.0mm, rational depth of groove between 0.05mm to 0.3mm, of course for special
It is more shallow or deeper that purpose can do groove.The outer rim that the width of groove also has suitable tolerance, best groove is not contacted
Packaging plastic, the overlapping dimension between the inner side edge and OLED of groove is less than 0.2mm, and inner edge is no more than with the overlap of luminous zone
0.2mm, the width of appropriateness is between 0.5mm to 2.0mm.
Because OLED electroluminescent materials and electrode material are easily by the erosion damage of steam in air, so OLED
Packaging operation is usually to be carried out in vacuum environment or inert gas, and outer light film raising photograph can be set on the outside of substrate
Bright efficiency, increases the service life.
Wherein, what drier can be made up of inorganic particle and liquid carrier also can one be based on organo-metallic compound
Constituted.
In addition to improving the light transmittance of cover plate, can be coated with the one side of the cover plate for having Back Word connected in star or two sides and subtracted
Reflective composite membrane, antireflective composite membrane is multilayer complex films, through repeatedly interference delustring so that reflectivity declines, light penetration
Improve.
The material of cover plate can be expected glass, or metal or the first day of the lunar month.Groove can be used up during with glass cover-plate
The methods such as quarter, sandblasting, laser make, the vertical groove in side at first processing during the processing of groove, in processing groove outer side edges
The gradient.
The device that the use that the present invention is provided has the cover plate of Back Word connected in star saves general flat board cover plate and liquid is dry
The advantage of drying prescription packaging, but there is provided longer device lifetime.
The present invention provides a kind of OLED encapsulated with the cover plate for having Back Word connected in star, and help solves above-mentioned prior art
Weak point, finally in the case of the addition sheet that reduces to the greatest extent extend OLED service life.The present invention is maintained and uses liquid
State drier and the benefit of flat board cover plate encapsulation, but solve when being encapsulated with liquid desiccant and flat board cover plate efficient drying agent too
The harm for causing packaging effect not good less.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is the structural representation of general groove cover plate packaging in the prior art;
Fig. 3 is the structural representation of invention conventional flat-panel packaging in the prior art;
Fig. 4 is the structural representation of polylith OLED same column of the present invention;
Wherein, 101- substrates, 102-OLED structures, 103- packaging plastics, 104- cover plates, 105- grooves, 106- substrates and cover plate it
Between be packaged glue around including the space including groove, 107- liquid desiccants.
Specific embodiment
The optimal technical scheme that the invention will now be described in detail with reference to the accompanying drawings.
The invention provides a kind of OLED encapsulated with the cover plate with Back Word connected in star, including substrate 101, evaporation
Back-shaped groove 105, packaging plastic 103 and liquid drier on OLED structure 102 on the substrate 101, cover plate 104, cover plate 104
107, the packaging plastic 103 is wound on around OLED structure 102 for a three-back-shaped corral remained silent, and the packaging plastic 103
Upper surface substrate 101, lower surface contact cover plate 104 forms a sealing ring, has in the inner side of packaging plastic 103 on cover plate 104
At least one back-shaped groove 105 of circle, the width of groove 105 less than the 1/10 of the width of OLED structure 102, fill by liquid desiccant 107
Be packaged between substrate 101 and cover plate 104 glue around including the space 106 including groove 105.
Wherein, substrate 101 is clear glass, and cover plate 04 is also clear glass, and liquid drier 107 is transparent, OLED
Device 102 is illuminating device or display device.
Preferably, the width of groove 105 is 0.5mm-2.0mm, and the depth of groove 105 is in 0.05 mm-0.3mm;Outer concave
The width of groove 105 is more than the width of inboard groove 105, the depth of the depth more than inboard groove 105 of outside groove 105;Groove
The width of the width more than the inner side of groove 105 in 105 outsides, the depth of the depth more than the inner side of groove 105 in the outside of groove 105.And
And the inner edge of most inboard groove is overlap with luminous zone no more than 0.2mm, the outer ledge of each of which groove may be configured as
Incline 0 ° -45 ° laterally from top to bottom.
The OLED encapsulated with the cover plate for having Back Word connected in star of the invention, sets at least one circle recessed in cover plate surrounding
Groove, and groove is located proximate to lateral location, and Back Word connected in star is located at the outer rim of OLED structures, so major part OLED knots
The luminous zone of structure is not in face of groove, the only way which must be passed of Back Word connected in star when steam enters device inside through packaging plastic
On, Back Word connected in star provides the space for placing more liquid driers, it is ensured that can adsorb more steam.
The width and depth of groove can do appropriate regulation according to device actual size, shape.General plate glass encapsulation
When gap between substrate and cover plate be about 15 millimeters, any depth of groove can all increase the amount of efficient drying agent because
General cover sheet thickness in 0.5-1.0mm, rational depth of groove between 0.05mm to 0.3mm, of course for special
It is more shallow or deeper that purpose can do groove.The outer rim that the width of groove also has suitable tolerance, best groove is not contacted
Packaging plastic, the overlapping dimension between the inner side edge and OLED structure of groove is less than 0.2mm, and inner edge is no more than with the overlap of luminous zone
0.2mm, the width of appropriateness is between 0.5mm to 2.0mm.
Because OLED electroluminescent materials and electrode material are easily by the erosion damage of steam in air, so OLED
Packaging operation is usually to be carried out in vacuum environment or inert gas, and outer light film raising photograph can be set on the outside of substrate
Bright efficiency, increases the service life.
Wherein, what drier can be made up of inorganic particle and liquid carrier also can one be based on organo-metallic compound
Constituted.
The method for packing of the OLED encapsulated with the cover plate for having Back Word connected in star of the invention, first in lid with groove
Packaging plastic and liquid drier are coated with plate, are then pressed together with the substrate for being deposited with organic material and electrode material again,
So packaging operation is basically completed.The material of cover plate can be expected glass, or metal or the first day of the lunar month.When using glass cover-plate
Groove can make of methods such as photoetching, sandblasting, laser, the vertical groove in side at first processing during the processing of groove, add
The gradient of work groove outer side edges.
The device of the cover plate that font groove is taken back in the use that the present invention is provided saves general flat board cover plate and liquid is dry
The advantage of drying prescription packaging, but there is provided longer device lifetime.
The present invention provides the OLED devices that a kind of glass cover-plate with groove is encapsulated, and help solves above-mentioned prior art
Weak point, the service life of final extension OLED luminescent devices.The present invention is maintained with liquid desiccant and flat board cover plate
The benefit of encapsulation, but solve efficient drying agent when being encapsulated with liquid desiccant and flat board cover plate causes packaging effect not good very little
Harm.
Beneficial effects of the present invention are tested, and the band groove glass that area is 370mmX470mm, thickness is 0.7mm is selected first
Glass cover plate, makes actual verification, groove size such as table 1 to various sizes of Back Word connected in star in batches.Take control variables simultaneously
Method, plate glass encapsulation is carried out to the device using same liquid drier, electroluminescent organic material, electrode material.Following table
These devices are listed in high temperature(80oC)High humidity(80%RH)Result after storage, device lifetime is defined as the luminous area edge of device
Visually visible stain or the time needed for black surround.
Glass cover-plate encapsulation OLED with groove, plate glass encapsulation OLED are randomly selected, 80 DEG C of & are placed on
80%RH(RH:Relative humidity)Constant-temperature constant-humidity environment in store, observe device life-span.Because the temperature of air at 18 DEG C extremely
Between 25 DEG C, relative humidity is between 40% to 60%, if device is placed stored in atmosphere, can take a long time
Experimental result can be observed, the environment of 80 DEG C &80%RH can shorten storage time, quickly obtain result, store result such as table 1.
The method of component failure is judged, if being observed visually stain black surround, component failure, conversely, device is normal.
Can intuitively be found out by table 1, band fluted glass cover plate packaging compares flat panel enclosure device, and service life is bright
Aobvious extension, and its life-span length has some linear with groove size, and with the increase of groove size, device uses the longevity
Life is longer.Contrast fluted glass packaging, the yield with fluted glass cover plate packaging is higher, and short circuit fault substantially subtracts
It is few.
Claims (4)
1. the OLED that the cover plate that a kind of use has Back Word connected in star is encapsulated, it is characterised in that:Including substrate(101), evaporation exist
Substrate(101)On OLED structure(102), cover plate(104), packaging plastic(103)And liquid drier(107), the packaging plastic
(103)For a three-back-shaped corral remained silent is wound on OLED structure(102)Around, and the packaging plastic(103)Upper surface connects
Touch substrate(101), lower surface contact cover plate(104)Form a sealing ring, cover plate(104)On in packaging plastic(103)Inner side has
At least one circle groove(105), the width of groove is less than OLED structure(102)The 1/10 of width, liquid desiccant(107)It is filled with
Substrate(102)And cover plate(104)Between be packaged glue around including groove(105)In interior space(106)).
2. the OLED for being encapsulated with the cover plate for having Back Word connected in star as claimed in claim 1, it is characterised in that:Substrate
(101)It is clear glass, cover plate(104)It is also clear glass, liquid drier(107)It is transparent, OLED structure(102)It is
Illuminating device or display device.
3. the OLED for being encapsulated with the cover plate for having Back Word connected in star as claimed in claim 1 or 2, it is characterised in that:Groove
(105)Width be 0.5mm-2.0mm, groove(105)Depth in 0.05 mm-0.3mm.
4. the OLED for being encapsulated with the cover plate for having Back Word connected in star as claimed in claim 3, it is characterised in that:Outside groove
(105)Width be more than inboard groove(105)Width, outside groove(105)Depth be more than inboard groove(105)Depth
Degree.
Priority Applications (1)
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CN201710007656.XA CN106784383A (en) | 2017-01-05 | 2017-01-05 | The OLED encapsulated with the cover plate for having Back Word connected in star |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108232040A (en) * | 2017-12-29 | 2018-06-29 | 信利(惠州)智能显示有限公司 | Packaging method and display equipment |
CN108987602A (en) * | 2017-12-13 | 2018-12-11 | 广东聚华印刷显示技术有限公司 | The encapsulating structure and production method of organic electroluminescence device |
CN109540344A (en) * | 2018-11-23 | 2019-03-29 | 重庆天胜科技有限公司 | A kind of OLED display not easy to crack |
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CN206370445U (en) * | 2017-01-05 | 2017-08-01 | 南京第壹有机光电有限公司 | The OLED encapsulated with the cover plate for having Back Word connected in star |
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CN108987602A (en) * | 2017-12-13 | 2018-12-11 | 广东聚华印刷显示技术有限公司 | The encapsulating structure and production method of organic electroluminescence device |
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CN109540344A (en) * | 2018-11-23 | 2019-03-29 | 重庆天胜科技有限公司 | A kind of OLED display not easy to crack |
CN109540344B (en) * | 2018-11-23 | 2024-02-13 | 佛山市铂彩光电有限公司 | OLED display not prone to cracking |
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