CN109860421B - Organic light-emitting diode display - Google Patents
Organic light-emitting diode display Download PDFInfo
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- CN109860421B CN109860421B CN201910093326.6A CN201910093326A CN109860421B CN 109860421 B CN109860421 B CN 109860421B CN 201910093326 A CN201910093326 A CN 201910093326A CN 109860421 B CN109860421 B CN 109860421B
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Abstract
The present invention provides an organic light emitting diode display, including: the packaging film comprises a first inorganic layer and a first organic layer, the pixel defining layer is arranged on the flexible substrate and comprises a plurality of non-luminous areas, and the non-luminous areas are provided with anti-stripping grooves; the first inorganic layer is arranged in the anti-stripping groove and on the pixel defining layer; the first organic layer is arranged on the first inorganic layer, and the first inorganic layer in the anti-stripping groove is covered with the first organic layer. The organic light emitting diode display can prolong the service life of the display.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an organic light emitting diode display.
[ background of the invention ]
An Organic Light-Emitting Diode (OLED) display screen has the advantages of Light weight, wide viewing angle, fast response time, low temperature resistance, high Light-Emitting efficiency, and the like, and is considered as a next generation display technology capable of comprehensively replacing a liquid crystal display panel.
When external water and oxygen invade the interior of the OLED device, the luminous efficiency and the service life of the device can be fatally influenced. In the thin film packaging technology, in order to effectively prevent the invasion of water and oxygen, an inorganic layer is commonly used as a barrier layer to achieve the purpose of preventing the invasion of water and oxygen, but the inorganic layer has large internal stress and is fragile, so that the inorganic layer is not resistant to bending, and the application of the inorganic layer in the packaging technology is severely limited. In order to solve the problem, the traditional packaging (TFE) film is commonly in an inorganic/organic/inorganic alternately laminated film structure, and an intermediate organic film layer is used as a buffer layer to achieve the purpose of slowly releasing the internal stress of an inorganic layer so as to enhance the flexibility of the TFE film.
However, when the inorganic layer is in direct contact with the organic layer, the organic layer and the inorganic layer have a large difference in performance, and therefore, when the OLED device is subsequently made into a flexible product for use, peeling is easily generated at the inorganic/organic interface, thereby reducing the service life of the OLED device.
Therefore, it is necessary to provide an organic light emitting diode display to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide an organic light emitting diode display, which can prolong the service life of the display.
In order to solve the above technical problem, the present invention provides an organic light emitting diode display, which includes:
a flexible substrate;
the pixel definition layer is arranged on the flexible substrate and comprises a plurality of non-luminous areas, and the non-luminous areas are provided with anti-stripping grooves;
an encapsulation film, comprising:
the first inorganic layer is arranged in the anti-stripping groove and on the pixel defining layer;
and the first organic layer is arranged on the first inorganic layer, wherein the first inorganic layer in the anti-stripping groove is also covered with the first organic layer.
The organic light-emitting diode display comprises a flexible substrate, a pixel definition layer and an encapsulation film, wherein the encapsulation film comprises a first inorganic layer and a first organic layer, the pixel definition layer is arranged on the flexible substrate and comprises a plurality of non-luminous areas, and the non-luminous areas are provided with anti-stripping grooves; the first inorganic layer is arranged in the anti-stripping groove and on the pixel defining layer; the first organic layer is arranged on the first inorganic layer, and the first inorganic layer in the anti-stripping groove is covered with the first organic layer; because the anti-stripping groove is arranged on the pixel defining layer, the interface of the inorganic layer and the organic layer is an uneven surface, the interaction force between the inorganic layer and the organic layer is effectively enhanced, the inorganic and organic junctions are prevented from stripping, and the service life of the display is prolonged.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an organic light emitting diode display according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the pixel definition layer of FIG. 1;
FIG. 3 is a top view of the pixel definition layer of FIG. 1;
FIG. 4 is a schematic diagram of a first structure of a second OLED display according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of the pixel definition layer of FIG. 4;
FIG. 6 is a diagram illustrating a second structure of a second OLED display according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of the pixel definition layer of fig. 6.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an organic light emitting diode display according to a first embodiment of the invention.
As shown in fig. 1, the organic light emitting diode display of the present embodiment includes a flexible substrate 12, a switch array layer 13, a pixel defining layer 14, and an encapsulation film 20; further, an anode (not shown), an organic light emitting layer 15, and a cathode (not shown) may be included.
The flexible substrate 12 is disposed on the glass substrate 11, and the material of the flexible substrate 12 is PI (polyimide).
The switch array layer 13 is arranged on the flexible substrate 12; the switch array comprises a plurality of thin film transistors, and the cross-sectional structure of the switch array comprises a buffer layer, a semiconductor layer, a gate insulating layer, a grid electrode, a first insulating layer, a metal part, a second insulating layer and a second metal layer. The second metal layer includes a source and a drain.
The anode is disposed on the switch array layer 13 and connected to the drain of the thin film transistor.
Referring to fig. 2 and 3, the pixel defining layer 14 is disposed on the anode, the pixel defining layer 14 includes a plurality of light emitting regions 141 and a plurality of non-light emitting regions 142, the light emitting regions 141 and the non-light emitting regions 142 are alternately disposed, and the non-light emitting regions 142 are provided with the anti-peeling grooves 30. The shape of the peeling prevention groove 30 is circular in a plan view, but may be other shapes such as a rectangle, an ellipse, and the like. In one embodiment, the anti-peeling groove 30 and the light-emitting region 141 are obtained by patterning the pixel defining layer 14, such as exposure, development, and the like, and the shape of the light-emitting region 141 may be rectangular in a top view.
In order to prevent the inorganic layer and the organic layer from being peeled off from each other, the peeling prevention groove 30 has a trapezoidal shape in a vertical section in one embodiment. Wherein the width S1 of the top of the peeling prevention groove 30 is smaller than the width S2 of the bottom of the peeling prevention groove 30. Wherein the peeling prevention groove 30 includes a sidewall and a bottom surface, and an acute angle C1 between the sidewall and the bottom surface is less than 90 degrees.
Wherein, in order to further enhance the interaction force between the inorganic layer and the organic layer, the depth of the anti-peeling groove 30 is in the range of 0.5 to 3 micrometers.
The organic light emitting layer 15 is arranged in the light emitting region 142; the organic light emitting layer 15 includes a red organic light emitting unit, a green organic light emitting unit, a blue organic light emitting unit, and the like.
The cathode is provided between the organic light emitting layer 15 and the encapsulation film 20.
In one embodiment, the encapsulation film 20 includes a first inorganic layer 21 and a first organic layer 22. In another embodiment, the encapsulation film 20 includes a first inorganic layer 21, a first organic layer 22, and a second inorganic layer 23. The first inorganic layer 21 is disposed in the anti-peeling groove 30 and on the organic light emitting layer 15 and the pixel defining layer 14 not covered by the organic light emitting layer 15; the material of the first inorganic layer 21 includes SiN, SiON, Al2O3、TiO2And SiCN.
The first organic layer 22 is disposed on the first inorganic layer 21, wherein the first inorganic layer 21 in the anti-peeling groove 30 is covered with the first organic layer 22; so that the contact surface between the first organic layer 22 and the first inorganic layer 21 is a non-flat surface.
A second inorganic layer 23 is disposed on the first organic layer 22.
It is understood that the encapsulation film includes an overlapping structure of inorganic layers and organic layers, wherein the stacking order and number of the inorganic layers and the organic layers are not limited to the present invention.
Because the anti-stripping groove is arranged on the pixel defining layer, the interface of the inorganic layer and the organic layer is an uneven surface, the interaction force between the inorganic layer and the organic layer is effectively enhanced, the inorganic/organic junction is prevented from stripping, the packaging effect is improved, and the service life of the display is further prolonged.
Referring to fig. 4 to 7, fig. 4 is a schematic structural diagram of an organic light emitting diode display according to a second embodiment of the present invention.
As shown in fig. 4 to 7, the present embodiment is different from the previous embodiment in that the non-light emitting region 142 of the present embodiment is further provided with the isolation pillars 33, that is, each non-light emitting region 142 is provided with the isolation pillars 33. The anti-peeling groove 30 includes a first groove 31 and a second groove 32, and the separation column 33 is disposed between the first groove 31 and the second groove 32.
Wherein the first groove 31 and the second groove 32 are symmetrically disposed with respect to the isolation pillar 33 in order to further enhance an interaction force between the inorganic layer and the organic layer. Wherein, the first groove 31 comprises a side wall and a bottom surface, and an included angle C2 between the side wall and the bottom surface is larger than 90 degrees and smaller than 180 degrees. I.e. the width of the top of the first groove 31 is greater than the width of the bottom of the first groove 31. It will be appreciated that the angle between the side wall of the second groove 32 and the bottom surface thereof is greater than 0 degrees and less than 90 degrees.
Wherein, in order to further enhance the interaction force between the inorganic layer and the organic layer, the projected area of the top 331 of the isolation pillar 33 on the flexible substrate 12 is larger than the projected area of the bottom 332 of the isolation pillar 33 on the flexible substrate 12. For example, the maximum width of the top 331 of the isolation pillar 33 is greater than the maximum width of the bottom 332 of the isolation pillar 31. In one embodiment, as shown in fig. 4 and 5, the top 331 of the isolation pillar 33 has an oval cross-sectional shape, and the bottom 332 of the isolation pillar 33 has a rectangular cross-sectional shape.
In another embodiment, as shown in fig. 6 and 7, the top 331 of the isolation pillar 33 has an oval cross-sectional shape, and the bottom 332 of the isolation pillar 33 has a rectangular cross-sectional shape.
Wherein, in order to further enhance the interaction force between the inorganic layer and the organic layer, the height of the isolation pillar 33 is greater than the thickness of the pixel defining layer 14.
On the basis of the first embodiment, the isolation columns are arranged in the non-light-emitting region, so that the non-flatness of the interface of the inorganic layer and the organic layer is increased, the interaction force between the inorganic layer and the organic layer is further enhanced, the inorganic and organic junctions are prevented from being peeled off, and the service life of the display is prolonged.
The organic light-emitting diode display comprises a flexible substrate, a pixel definition layer and an encapsulation film, wherein the encapsulation film comprises a first inorganic layer and a first organic layer, the pixel definition layer is arranged on the flexible substrate and comprises a plurality of non-luminous areas, and the non-luminous areas are provided with anti-stripping grooves; the first inorganic layer is arranged in the anti-stripping groove and on the pixel defining layer; the first organic layer is arranged on the first inorganic layer, and the first inorganic layer in the anti-stripping groove is covered with the first organic layer; because the anti-stripping groove is arranged on the pixel defining layer, the interface of the inorganic layer and the organic layer is an uneven surface, the interaction force between the inorganic layer and the organic layer is effectively enhanced, the inorganic and organic junctions are prevented from stripping, and the service life of the display is prolonged.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (8)
1. An organic light emitting diode display, comprising:
a flexible substrate;
the pixel definition layer is arranged on the flexible substrate and comprises a plurality of non-luminous areas, and the non-luminous areas are provided with anti-stripping grooves;
an encapsulation film, comprising:
the first inorganic layer is arranged in the anti-stripping groove and on the pixel defining layer;
the first organic layer is arranged on the first inorganic layer, wherein the first organic layer is covered on the first inorganic layer in the anti-stripping groove;
the non-light-emitting area is further provided with an isolation column, the anti-stripping groove comprises a first groove and a second groove, the isolation column is arranged between the first groove and the second groove, and the height of the isolation column is larger than the thickness of the pixel defining layer.
2. The organic light-emitting diode display defined in claim 1 wherein the anti-lift-off grooves have a depth in the range of 0.5 to 3 microns.
3. The organic light-emitting diode display according to claim 1, wherein the width of the top of the anti-peeling groove is smaller than the width of the bottom of the anti-peeling groove.
4. The organic light-emitting diode display according to claim 3, wherein the shape of the longitudinal section of the peeling prevention groove is a trapezoid.
5. The organic light-emitting diode display defined in claim 1,
the projection area of the top of the isolation column on the flexible substrate is larger than that of the bottom of the isolation column on the flexible substrate.
6. The organic light-emitting diode display according to claim 5, wherein the cross-sectional shape of the top of the isolation pillar is trapezoidal or elliptical, and the cross-sectional shape of the bottom of the isolation pillar is rectangular.
7. The organic light-emitting diode display defined in claim 1 wherein the first recess comprises a sidewall and a bottom surface, the sidewall being angled at greater than 90 degrees and less than 180 degrees from the bottom surface.
8. The organic light-emitting diode display defined in claim 1 wherein the first and second grooves are symmetrically disposed with respect to the spacer.
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| CN201910093326.6A CN109860421B (en) | 2019-01-30 | 2019-01-30 | Organic light-emitting diode display |
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| CN201910093326.6A CN109860421B (en) | 2019-01-30 | 2019-01-30 | Organic light-emitting diode display |
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| CN109860421A CN109860421A (en) | 2019-06-07 |
| CN109860421B true CN109860421B (en) | 2020-12-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110391349B (en) * | 2019-07-25 | 2021-06-22 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting diode display panel and manufacturing method thereof |
| CN110739340B (en) * | 2019-10-30 | 2022-06-24 | 京东方科技集团股份有限公司 | Display device, display panel and manufacturing method thereof |
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| CN103887261A (en) * | 2014-03-03 | 2014-06-25 | 京东方科技集团股份有限公司 | Flexible displayer and manufacturing method thereof |
| CN105304676A (en) * | 2015-09-22 | 2016-02-03 | 深圳市华星光电技术有限公司 | Flexible organic light-emitting device packaging structure and flexible display device |
| CN108807494A (en) * | 2018-07-06 | 2018-11-13 | 云谷（固安）科技有限公司 | Display base plate and preparation method thereof, display panel and display device |
| CN109037487A (en) * | 2018-08-09 | 2018-12-18 | 武汉华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
| CN109216409A (en) * | 2017-06-30 | 2019-01-15 | 昆山国显光电有限公司 | OLED display panel and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10211416B2 (en) * | 2016-12-28 | 2019-02-19 | Shanghai Tianma AM-OLED Co., Ltd. | Flexible display panel, fabrication method, and flexible display apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887261A (en) * | 2014-03-03 | 2014-06-25 | 京东方科技集团股份有限公司 | Flexible displayer and manufacturing method thereof |
| CN105304676A (en) * | 2015-09-22 | 2016-02-03 | 深圳市华星光电技术有限公司 | Flexible organic light-emitting device packaging structure and flexible display device |
| CN109216409A (en) * | 2017-06-30 | 2019-01-15 | 昆山国显光电有限公司 | OLED display panel and preparation method thereof |
| CN108807494A (en) * | 2018-07-06 | 2018-11-13 | 云谷（固安）科技有限公司 | Display base plate and preparation method thereof, display panel and display device |
| CN109037487A (en) * | 2018-08-09 | 2018-12-18 | 武汉华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
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