CN107565056B - A kind of package substrate, OLED display panel and its packaging method - Google Patents
A kind of package substrate, OLED display panel and its packaging method Download PDFInfo
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- CN107565056B CN107565056B CN201710758146.6A CN201710758146A CN107565056B CN 107565056 B CN107565056 B CN 107565056B CN 201710758146 A CN201710758146 A CN 201710758146A CN 107565056 B CN107565056 B CN 107565056B
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Abstract
The present invention provides a kind of package substrate, OLED display panel and its packaging method, by the way that multiple first spacer materials are arranged on package substrate, first spacer material forms the guide channel for being used for water conservancy diversion packaging plastic, package substrate with to box substrate in box encapsulation process, packaging plastic can be spread along guide channel, packaging plastic is spread according to preset direction and path, realize that packaging plastic flow direction is controllable, and the mobility of packaging plastic is improved to a certain extent, and improve the uniformity of packaging plastic filling.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of package substrate, OLED display panel and its packaging method.
Background technique
OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) device due to its have it is complete solid
State structure, high brightness, full view, fast response time, operating temperature range are wide, the series of advantages such as Flexible Displays, mesh can be achieved
Before have become the next-generation display technology of great competitiveness and development prospect.Luminous organic material used in OLED device and
Cathode material is especially sensitive to water and oxygen, the excessively moist or excessively high service life that all will affect OLED device of oxygen content.
In order to effectively obstruct the influence of water and oxygen to OLED device, need to be packaged it, as shown in Figure 1a, in 3 He of array substrate
Packaging plastic 2 is instilled between package substrate 1, to obstruct the water and oxygen in air, and array substrate 3 and package substrate 1 is used
Sealant is adhesively fixed, to realize sealing.It is additionally provided with the spacer material 5 to supporting case thickness on package substrate 1, encapsulates
Afterwards, the surface coated electrode 51 of spacer material can be electrically connected with the cathode 421 in OLED device in array substrate 3, realize auxiliary
The effect of cathode.
In conjunction with shown in Fig. 1 a and Fig. 1 b, in encapsulation process, the mobility of packaging plastic 2 is poor, is often difficult to control
The case where it is sprawled causes the non-encapsulated glue 2 in OLED display panel partial region to be filled, can generate bubble after encapsulating in this way.
The partial region packaging plastic 2 that will appear OLED display panel is excessive, and the auxiliary cathode function of the electrode 51 on spacer material 5 is caused to be lost
Effect, or even above two problem occurs simultaneously in same OLED display panel.
Therefore a kind of package substrate, OLED display panel and its packaging method are needed to solve the above problems.
Summary of the invention
The present invention aiming at the above shortcomings existing in the prior art, provide a kind of package substrate, OLED display panel and its
Packaging method, at least partly to solve OLED display panel in encapsulation process, packaging plastic mobility is uncontrollable, is unevenly distributed
Even problem.
The present invention is in order to solve the above technical problems, adopt the following technical scheme that
The present invention provides a kind of package substrate, including underlay substrate, further includes multiple be arranged on the underlay substrate
First spacer material, each first spacer material form the guide channel for being used for water conservancy diversion packaging plastic, and the packaging plastic can be along described
Guide channel diffusion.
Further, the package substrate further includes multiple second spacer materials, and the height of second spacer material is greater than institute
State the height of the first spacer material.
Preferably, the quantity of first spacer material is less than the quantity of second spacer material.
Preferably, first spacer material is in streamlined.
Preferably, first spacer material is ellipse, round or water-drop-shaped.
Preferably, the guide channel is multiple, and is in divergent shape, and at least partly described guide channel is arc-shaped.
The present invention also provides a kind of OLED display panel, including being provided with the array substrate of OLED device and foregoing
Package substrate, first spacer material and second spacer material are corresponding with the non-pixel openings region of the array substrate,
Packaging plastic is filled between the package substrate and the array substrate.
Preferably, first spacer material surface is covered with first electrode, and second spacer material surface is covered with second
Electrode；
The first electrode is in contact with the cathode of the OLED device；The second spacer material forced compression, and it is described
Second electrode is in contact with the cathode of the OLED device.
The present invention also provides a kind of packaging methods of OLED display panel, for encapsulating foregoing OLED display surface
Plate, which comprises
Packaging plastic is filled on the package substrate, so that the packaging plastic is spread along the guide channel.
Further, it is described on the package substrate fill packaging plastic after, the method also includes:
The array substrate and the package substrate to box and are pressed, so that the second spacer material forced compression, and
The second electrode and the first electrode is set to be in contact respectively with the cathode of the OLED device.
The present invention can be realized it is following the utility model has the advantages that
Package substrate provided by the invention and its packaging method, OLED display panel are arranged multiple on package substrate
One spacer material, first spacer material form the guide channel for being used for water conservancy diversion packaging plastic, package substrate with to box substrate to box
In encapsulation process, packaging plastic can be spread along guide channel, and packaging plastic is expanded according to preset direction and path
It dissipates, realizes that packaging plastic flow direction is controllable, and improve the mobility of packaging plastic to a certain extent, and improve packaging plastic filling
Uniformity.
Detailed description of the invention
Fig. 1 a is the partial structural diagram of existing OLED display panel；
Fig. 1 b is that packaging plastic flows to schematic diagram when existing OLED display panel encapsulates；
Fig. 2 is partial structural diagram of the OLED display panel provided by the invention to box but when not pressing；
Fig. 3 is the first spacer material distribution schematic diagram in OLED display panel provided by the invention；
Fig. 4 is the partial schematic diagram after OLED display panel provided by the invention encapsulation；
Fig. 5 is that packaging plastic flows to schematic diagram when OLED display panel provided by the invention encapsulates.
Marginal data:
1, package substrate 2, packaging plastic 3, array substrate
11, underlay substrate 12, the first spacer material 13, guide channel
14, the second spacer material 15, conductive layer 41, pixel defining layer
42, organic luminescence function layer 421, cathode
131, linear guide channel 132, arcuate guide channel
121, first electrode 141, second electrode
Specific embodiment
Below in conjunction with the attached drawing in the present invention, clear, complete description is carried out to the technical solution in the present invention, is shown
So, described embodiment is a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the scope of protection of the invention.
In conjunction with shown in Fig. 2 and Fig. 5, the present invention provides a kind of package substrate 1, and package substrate 1 includes underlay substrate 11, also wraps
Multiple the first spacer materials 12 being arranged on underlay substrate 11 are included, each first spacer material 12 forms leading for water conservancy diversion packaging plastic 2
To channel 13, packaging plastic 2 can be spread along guide channel 13.Direction shown in arrow is the side of the flowing diffusion of packaging plastic 2 in Fig. 5
To.
Multiple first spacer materials 12 are set on package substrate 1, are formed by the first spacer material 12 for water conservancy diversion packaging plastic 2
Guide channel 13, package substrate 1 with to box substrate (i.e. array substrate) in box encapsulation process, packaging plastic 2 can be along guiding
Channel 13 is spread, and packaging plastic 2 is spread according to preset direction and path, realizes that 2 flow direction of packaging plastic can
Control, and the mobility of packaging plastic 2 is improved to a certain extent, and improves the uniformity of the filling of packaging plastic 2.
In conjunction with shown in Fig. 2 to Fig. 5, package substrate 1 further includes multiple second spacer materials 14, and the height of the second spacer material 14 is big
In the height of the first spacer material 12.
Specifically, can be when making spacer material, using halftone (intermediate tone mask) technique, by intermediate tone mask
Plate produces different the first spacer materials 12 and the second spacer material 14 of height, relative to existing spacer material manufacture craft, not
Increase processing step.
As shown in Figure 2 and Figure 4, package substrate 1 and array substrate 3 are to display panel is formed after box encapsulation, of the invention real
It applies in example, is illustrated for being provided with OLED device in array substrate 3, package substrate 1 is formed after encapsulating with array substrate 3
OLED display panel.It should be noted that package substrate 1 and array substrate 3 can also form LCD (Liquid after encapsulating
Crystal Display, liquid crystal display panel).Since the height of the second spacer material 14 is greater than the height of the first spacer material 12, because
This is mainly played a supportive role by the second spacer material 14 after package substrate 1 and the encapsulation of array substrate 3, i.e., the second spacer material 14 is opposite
More pressure are born in the first spacer material 12, supporting case is thick.
As shown in Figure 3 and Figure 5, since the first spacer material 12 needs to form guide channel 13, if the first spacer material 12
Negligible amounts, setting is more sparse, then is extremely difficult to the effect of water conservancy diversion packaging plastic 2.And the second spacer material 14 has been mainly support
Effect, as long as being evenly distributed on package substrate 1.Therefore, the quantity of the first spacer material 12 is less than the second spacer material 14
Quantity.
For same packaging plastic 2, the distribution density of the first spacer material 12 can determine the speed that packaging plastic 2 is filled,
Therefore, the distribution density of determining first spacer material 12 can be required according to actual production technique, to realize complete to packaging plastic 2
The control for the time sprawl, spread.
Preferably, the first spacer material 12 is in streamlined, and the packaging plastic 2 of fusiform first spacer material 12 and flow-like connects
Touching, so that the lateral resistance very little of the first spacer material 12, big influence will not be generated to the proper flow of packaging plastic 2, is facilitated
The flowing and diffusion of packaging plastic 2, to guarantee that packaging plastic 2 is smoothly filled.
Preferably, the first spacer material 12 can be ellipse, round or water-drop-shaped, in embodiments of the present invention, such as Fig. 3 and
Shown in Fig. 5, the first spacer material 12 is ellipse, skilled person will appreciate that, the shape of the first spacer material 12 is not limited to certainly
Above-mentioned cited shape, any streamlined in shape that can aid in the flowing of packaging plastic 2 and diffusion is in protection of the invention
Within the scope of.
It should be noted that the end of the first spacer material 12 forms big resistance to packaging plastic 2, according to 12 side of the first spacer material
To the resistance difference between end, the direction of the first spacer material 12 is set, the accurate control to 2 flow direction of packaging plastic may be implemented
System.For example, when the first spacer material 12 is water-drop-shaped, the direction and packaging plastic 2 of the lesser one end of each first spacer material, 12 resistance
It is consistent along the direction that guide channel 13 flows, that is to say, that the biggish one end of the first spacer material 12 is initially dripped towards packaging plastic 2
The side of position, packaging plastic 2 flow to lesser one end from the biggish one end of each first spacer material 12 along guide channel 13.Water-drop-shaped
The first spacer material 12 compared to ellipse and circular first spacer material 12 for, be more advantageous to the flowing and expansion of packaging plastic 2
It dissipates, diversion effect is more excellent.
First spacer material 12 of ellipse or water-drop-shaped, end is big to the resistance of packaging plastic 2, laterally to packaging plastic 2
Resistance is small, so as to guide, adjust the direction of motion of packaging plastic 2, and it is finally made to sprawl form close to expection.
The shapes and sizes of first spacer material 12 can be adjusted by the production of mask plate, fill out entire packaging plastic 2
The process filled is not controlled in the micron-scale.
Preferably, guide channel 13 is multiple, and is in divergent shape, and at least partly guide channel 13 is arc-shaped, the first dottle pin
It, can be by the way that certain angle be arranged in 12 horizontal tilt of the first spacer material, to form the guiding of arc when object 12 is non-circular
Channel 13.Pass through formed arc guide channel 13, it is ensured that packaging plastic 2 from initial dripping position to all directions flowing and
Diffusion, the diversion mode that this detour mitigates can weaken packaging plastic 2 to the frontal impact of the first spacer material 12.
As shown in figure 5, in embodiments of the present invention, part guide channel 13 is arc-shaped, part wire channel 13 is linear
Shape, packaging plastic 2 is from initial dripping position A (positioned at the middle position of package substrate 1) respectively along linear guide channel 131 and arc
Shape guide channel 132 is spread, when packaging plastic 2 flow to the right side edge position of package substrate 1, then along linear guide channel
The up and down two sides diffusion of 131 difference.
The present invention also provides a kind of OLED display panels, as shown in figure 4, the OLED display panel includes being provided with OLED
The array substrate 3 and foregoing package substrate 1 of device, the first spacer material 12 and the second spacer material 14 and array substrate 3
Non- pixel openings region is corresponding, and packaging plastic 2 is filled between package substrate 1 and array substrate 3.
Multiple first spacer materials 12 are arranged in OLED display panel provided by the invention on package substrate 1, by each first every
Underbed 12 forms the guide channel 13 for being used for water conservancy diversion packaging plastic 2, in package substrate 1 and array substrate 3 in box encapsulation process, seals
Dress glue 2 can be spread along guide channel 13, and packaging plastic 2 is spread according to preset direction and path, realize envelope
Dress 2 flow direction of glue is controllable, and improves the mobility of packaging plastic 2 to a certain extent, and improves the uniform of the filling of packaging plastic 2
Property.
OLED device includes the pixel defining layer 41 being formed in array substrate 3 and organic luminescence function layer 42, You Jifa
Light functional layer 42 is located in the open area of pixel defining layer 41, may include: anode, hole injection layer, hole transmission layer, hair
Photosphere, electron transfer layer, electron injecting layer and cathode 421.In embodiments of the present invention, OLED device is top-emitting OLED device
Part, and cathode 421 is located at side of the OLED device far from array substrate 3.
Further, as shown in Figure 2 and Figure 4,12 surface of the first spacer material is covered with first electrode 121, the second spacer material
14 surfaces are covered with second electrode 141, between the first spacer material 12 and the second spacer material 14 and the underlay substrate 11 of package substrate 1
It is additionally provided with conductive layer 15, first electrode 121 and second electrode 141 are connected with conductive layer 15.First electrode 121 and the second electricity
The material of pole 141 can be ITO (Indium tin oxide, tin indium oxide), and first electrode 121 and second electrode 141 can be with
For same electrode.
First electrode 121 is in contact with the cathode 421 of OLED device, 14 forced compression of the second spacer material, and second electrode
141 are in contact with the cathode 421 of OLED device.First electrode 121 and second electrode 141 with 421 phase of the cathode of OLED device
Contact, i.e., may be implemented the function of auxiliary cathode.It should be noted that the first spacer material 12 receiving pressure is smaller or is not subject to
Pressure hardly happens deformation, so that the first electrode 121 for being covered on 12 surface of the first spacer material is not easily broken, damaged.
Since the second spacer material 14 plays supporting case thickness, and it is covered on the second electrode on 14 surface of the second spacer material
141 are electrically connected with the cathode 421 of OLED device, play electric action, realize the function of auxiliary cathode.Package substrate 1 and array base
After plate 3 encapsulates box, 14 forced compression of the second spacer material, deformation occurs, and second electrode 141 is easy to happen broken, leads to conduction
Ability is inconsistent, and the function of auxiliary cathode can not be realized normally.In the present invention, by the way that the first spacer material 12 is additionally arranged, make
The height of first spacer material 12 is lower than the height of the second spacer material 14, while guaranteeing to seal box in package substrate 1 and array substrate 3
After dress, the first electrode 121 for being covered on 12 surface of the first spacer material is also electrically connected with the cathode 421 of the OLED device of lower section, is risen
Electric action equally can be realized the function of auxiliary cathode 421, in this way, still having the first electricity even if second electrode 141 is damaged
Pole 121 is electrically connected with cathode 421, guarantees that auxiliary cathode normally plays a role.
As shown in Fig. 2, when package substrate 1 and array substrate 3 are to box but do not press, first electrode 121 and OLED device
Cathode 421 do not contact.Preferably, the difference of the height of the second spacer material 14 and the height of the first spacer material 12 is equal to the second dottle pin
The decrement of 14 forced compression of object, i.e., when package substrate 1 and array substrate 3 press box, 14 forced compression of the second spacer material
Deformation occurs, and deformation occurs for the first spacer material 12, does not play a supportive role, only just contacts and is electrically connected with cathode 421,
The damaged risk of the first electrode 121 on 12 surface of the first spacer material can be reduced in this way.
The present invention also provides a kind of packaging method of OLED display panel, the method is for encapsulating foregoing OLED
Display panel the described method comprises the following steps in conjunction with shown in Fig. 3 and Fig. 5:
Packaging plastic 2 is filled on package substrate 1, so that packaging plastic 2 is spread along guide channel 13.
Specifically, instilling packaging plastic 2 at the location A of package substrate 1, packaging plastic 2 can be along linear guide channel 131
It flows and spreads with arcuate guide channel 132, to uniformly spread on entire package substrate 1.
In package substrate 1 and array substrate 3 in box encapsulation process, packaging plastic 2 can be spread along guide channel 13, so that
Packaging plastic 2 can be spread according to preset direction and path, realize that 2 flow direction of packaging plastic is controllable, and to a certain degree
The upper mobility for improving packaging plastic 2, and improve the uniformity of the filling of packaging plastic 2.
Further, as shown in figure 4, after filling packaging plastic 2 on package substrate 1, the method also includes:
Array substrate 3 and package substrate 1 to box and are pressed, so that 14 forced compression of the second spacer material, and make the second electricity
Pole 141 and first electrode 121 are in contact with the cathode of OLED device 421 respectively.
Specifically, by external force, packaging plastic 2 further lead by edge during pressing array substrate 3 and package substrate 1
It flows and spreads to channel 13.Moreover, being covered on 12 surface of the first spacer material after package substrate 1 and array substrate 3 are to box encapsulation
First electrode 121 be also in contact with the cathode 421 of the OLED device of lower section, in this way, even if second electrode 141 is damaged, still
There is first electrode 121 to be electrically connected with cathode 421, guarantees that auxiliary cathode normally plays a role.
The present invention has carried out special shape to spacer material and has handled, and arranges according to predetermined direction, in pixel openings region
Between form barrier, the flow direction of packaging plastic 2 is controlled, to solve that packaging plastic filling is uneven, dispersal direction is uncontrollable
Problem.And by spacer material be divided into height two kinds, higher spacer material (i.e. the second spacer material 14) plays a supportive role, it is lower every
The damaged probability of the first electrode 121 covered on underbed (i.e. the first spacer material 12) is lower, guarantees resistance uniformity, plays auxiliary
The effect of OLED device cathode, to solve the problem of that the inconsistent auxiliary cathode of resistance can not normally play a role.
Package substrate and packaging method of the invention is not limited to the encapsulation of oled panel, can be applied to have spacer material
The display device for needing to encapsulate realizes the distribution of accurate control packaging plastic.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of package substrate, including underlay substrate, which is characterized in that further include multiple be arranged on the underlay substrate
One spacer material, each first spacer material form the guide channel for being used for water conservancy diversion packaging plastic, and the packaging plastic can be led along described
Spread to channel, the guide channel is multiple, and in being with the predetermined position of the viewing area at the middle part of the package substrate in
The divergent shape that the heart is dissipated towards the edge of the package substrate, first spacer material are in streamlined, and first spacer material
Laterally along the guide channel extending direction be arranged.
2. package substrate as described in claim 1, which is characterized in that further include multiple second spacer materials, second dottle pin
The height of object is greater than the height of first spacer material.
3. package substrate as claimed in claim 2, which is characterized in that the quantity of first spacer material be less than described second every
The quantity of underbed.
4. package substrate as described in claim 1, which is characterized in that first spacer material is ellipse, round or water droplet
Shape.
5. package substrate as described in claim 1, which is characterized in that at least partly described guide channel is arc-shaped.
6. a kind of OLED display panel, which is characterized in that including be provided with the array substrate of OLED device and such as claim 2 or
The non-pixel openings region of package substrate described in 3, first spacer material and second spacer material and the array substrate
It is corresponding, packaging plastic is filled between the package substrate and the array substrate.
7. OLED display panel as claimed in claim 6, which is characterized in that first spacer material surface is covered with the first electricity
Pole, second spacer material surface are covered with second electrode；
The first electrode is in contact with the cathode of the OLED device；The second spacer material forced compression, and described second
Electrode is in contact with the cathode of the OLED device.
8. a kind of packaging method of OLED display panel, which is characterized in that shown for encapsulating OLED as claimed in claim 7
Panel, which comprises
Packaging plastic is filled on the package substrate, so that the packaging plastic is spread along the guide channel.
9. method according to claim 8, which is characterized in that it is described on the package substrate fill packaging plastic after, institute
State method further include:
The array substrate and the package substrate to box and are pressed, so that the second spacer material forced compression, and make institute
It states second electrode and the first electrode is in contact with the cathode of the OLED device respectively.
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| CN108777910B (en) * | 2018-06-15 | 2020-05-12 | 武汉华星光电半导体显示技术有限公司 | Flexible circuit board, display panel and display module |
| CN109103347B (en) * | 2018-08-28 | 2020-06-23 | 京东方科技集团股份有限公司 | OLED display panel and preparation method thereof |
| CN110602865B (en) * | 2019-06-17 | 2020-12-22 | 厦门佳普乐电子科技有限公司 | Circuit device with multiple layers of glue filling and glue filling method |
| CN110323261B (en) * | 2019-07-04 | 2022-09-13 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| WO2022233046A1 (en) * | 2021-05-07 | 2022-11-10 | 重庆康佳光电技术研究院有限公司 | Spliced display screen, color film assembly, display backboard, panel and manufacturing method therefor |
| WO2023004768A1 (en) * | 2021-07-30 | 2023-02-02 | 京东方科技集团股份有限公司 | Display substrate and display apparatus |
| CN114035380B (en) * | 2021-11-01 | 2023-07-14 | 重庆康佳光电技术研究院有限公司 | Color film substrate, display panel and color film substrate preparation method |
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| JP2014067543A (en) * | 2012-09-25 | 2014-04-17 | Toppan Printing Co Ltd | Organic el element and method for manufacturing organic el element |
| CN104078491B (en) * | 2014-06-20 | 2018-04-13 | 京东方科技集团股份有限公司 | Color membrane substrates and preparation method thereof, display panel and display device |
| CN104112767B (en) * | 2014-07-28 | 2017-09-19 | 京东方科技集团股份有限公司 | Array base palte, organic LED display panel and display device |
| CN105609660B (en) * | 2016-03-22 | 2017-11-24 | 京东方科技集团股份有限公司 | A kind of OLED display panel and its method for packing, display device |
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