CN107742639B - Flexible OLED display panel and display device - Google Patents
Flexible OLED display panel and display device Download PDFInfo
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- CN107742639B CN107742639B CN201711201708.3A CN201711201708A CN107742639B CN 107742639 B CN107742639 B CN 107742639B CN 201711201708 A CN201711201708 A CN 201711201708A CN 107742639 B CN107742639 B CN 107742639B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The present invention provides a flexible OLED display panel, comprising: the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate; the TFT device layer is prepared in the display area of the flexible substrate; the light-emitting device layer is prepared on the surface of the TFT device layer; the metal routing is prepared in the routing area of the flexible substrate; the routing area is set to be a structure capable of reducing the surface bending stress of the routing area; the beneficial effects are that: according to the OLED display panel provided by the invention, the bending area of the flexible substrate is provided with the structure capable of reducing the bending stress, so that the metal wiring is prevented from falling off in the bending process of the flexible substrate, and the product quality is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible OLED display panel and a display device with the same.
Background
Compared with a TFT-LCD (thin film transistor-liquid crystal display), an AMOLED (Active-matrix organic light emitting diode) has the advantages of being light, thin, low power consumption, high contrast, high color gamut, and capable of realizing flexible display, and has become a development trend of the next display technology.
The flexible display device includes a PI (Polyimide) substrate, which is usually made of plastic and has a certain flexibility. A display area and a peripheral wiring area (Border) are arranged on the PI substrate base plate, and the Border width is generally 3-5 mm, so that the manufactured display frame is wide.
However, in the market, the display has a requirement that the display has a narrow frame without a frame, and in order to meet the market requirement, the wiring area can be bent at present and folded to the back of the display area, so as to reduce the width of the wiring area, and further the display with a narrow frame can be produced.
Because the wiring area and the display area are arranged on the surface of one side of the PI substrate base plate, larger stress can be generated at the bending part, so that the film and the metal wiring are subjected to peeling, and the display function is further influenced.
To sum up, in the flexible OLED display panel of the prior art, in order to hide the routing area of the PI substrate base plate, the routing area needs to be bent to the back of the PI substrate base plate, and the bent portion can generate large stress, which easily causes the metal routing to fall off, thereby affecting the quality of the product.
Disclosure of Invention
The invention provides an OLED display panel, wherein a structure capable of reducing stress generated by bending is arranged in a bending area; in order to solve prior art's flexible OLED display panel, need buckle the wiring district to PI substrate base plate back in order to hide the wiring district of PI substrate base plate, the bending can produce great stress, easily leads to the metal to walk the line and drops, and then influences the technical problem of product quality.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the present invention provides a flexible OLED display panel, comprising:
the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate;
the TFT device layer is prepared in the display area of the flexible substrate;
the light-emitting device layer is prepared on the surface of the TFT device layer; and the number of the first and second groups,
the metal routing is prepared in the routing area of the flexible substrate;
the routing area is set to be a structure capable of reducing the surface bending stress of the routing area.
According to a preferred embodiment of the present invention, the film thickness of the flexible substrate corresponding to the trace area is smaller than the film thickness of the flexible substrate corresponding to the display area.
According to a preferred embodiment of the present invention, the routing area includes a connection end connected to the display area and a bonding end far away from the connection end, and a film thickness of the flexible substrate corresponding to the bonding end is equal to a film thickness of the flexible substrate corresponding to the display area.
According to a preferred embodiment of the present invention, the flexible substrate corresponding to the routing area includes a first surface on which the metal routing is prepared, and a second surface opposite to the first surface, wherein the second surface is provided with strip-shaped grooves distributed at intervals.
According to a preferred embodiment of the present invention, the long side of the strip-shaped groove is parallel to the connection end of the trace area.
According to a preferred embodiment of the present invention, the longitudinal cross-sectional shape of the strip-shaped groove is rectangular.
According to a preferred embodiment of the present invention, the longitudinal cross-sectional shape of the strip-shaped groove is a triangle.
In accordance with the above object of the present invention, there is provided a flexible OLED display device including:
the OLED display panel comprises an OLED display panel and an encapsulation layer prepared outside the OLED display panel;
the OLED display panel includes:
the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate;
the TFT device layer is prepared in the display area of the flexible substrate;
the light-emitting device layer is prepared on the surface of the TFT device layer; and the number of the first and second groups,
the metal routing is prepared in the routing area of the flexible substrate;
the routing area is set to be a structure capable of reducing the surface bending stress of the routing area.
According to a preferred embodiment of the present invention, the film thickness of the flexible substrate corresponding to the trace area is smaller than the film thickness of the flexible substrate corresponding to the display area.
According to a preferred embodiment of the present invention, the routing area includes a connection end connected to the display area and a bonding end far away from the connection end, and a film thickness of the flexible substrate corresponding to the bonding end is equal to a film thickness of the flexible substrate corresponding to the display area.
The invention has the beneficial effects that: according to the OLED display panel provided by the invention, the bending area of the flexible substrate is provided with the structure capable of reducing the bending stress, so that the metal wiring is prevented from falling off in the bending process of the flexible substrate, and the product quality is improved; the flexible OLED display panel solves the technical problems that in order to hide the wiring area of the PI substrate base plate, the wiring area needs to be bent to the back of the PI substrate base plate, the bent part can generate large stress, metal wiring is prone to falling off, and product quality is affected.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flat state of a flexible OLED display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a flexible OLED display panel according to an embodiment of the present invention in a bent state;
FIG. 3 is a schematic structural diagram of a second tiled state of the flexible OLED display panel according to the present invention;
FIG. 4 is a schematic structural diagram of a flexible OLED display panel according to a second embodiment of the present invention in a bent state;
FIG. 5 is a schematic structural diagram of a flexible OLED display panel according to an embodiment of the present invention in a three-fold flat state;
fig. 6 is a schematic structural diagram of a flexible OLED display panel in a three-bending state according to an embodiment of the present invention.
Detailed Description
The liquid crystal display assembly provided by the embodiments of the present invention is described in detail above, and the principles and embodiments of the present invention are explained herein using specific examples, which are provided only to help understanding of the present invention. Meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention. The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the 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.
Aiming at the technical problems that in the flexible OLED display panel in the prior art, in order to hide the wiring area of the PI substrate base plate, the wiring area needs to be bent to the back side of the PI substrate base plate, and the bent part can generate larger stress, so that metal wiring is easy to fall off, and the product quality is influenced; the present embodiment can solve this drawback.
Example one
As shown in fig. 1, the flexible OLED display panel provided in the present invention is in a flat state; the flexible OLED display panel comprises a flexible substrate 101, wherein a display area 102 and a wiring area 103 located at one end of the display area 102 are defined on the surface of the flexible substrate 101; the trace area 103 can be bent to one side of the flexible substrate 101, so as to hide the trace area 103 to the back of the flexible substrate 101.
The display region 102 is prepared with a TFT device layer 104, the TFT device layer 104 includes TFT devices distributed in an array, a planarization layer is prepared on the surface of the TFT device layer 104, and pixel defining banks distributed in an array are arranged on the surface of the planarization layer; and a light-emitting device layer is prepared on the surface of the planarization layer, the light-emitting device layer comprises OLED devices distributed in an array manner, and the OLED devices are correspondingly arranged in the pixel defining dyke part and are connected with the corresponding TFT devices.
A metal wire 105 is prepared in the wire area 103 of the flexible substrate 101; for example, the metal trace 105 is a GOA circuit trace, and the metal trace 105 extends into the display region 102 and connects the TFT device layer 104 and the OLED device layer.
The trace area 103 is configured as a structure capable of reducing the surface bending stress of the trace area 103.
For example, the film thickness of the flexible substrate 101 corresponding to the trace area 103 is smaller than the film thickness of the flexible substrate 101 corresponding to the display area 102. When the trace region 103 is bent, a tensile stress is generated on the surface provided with the metal trace 105, a molecular structure of the bent surface moves and separates, and particularly, the middle position of the trace region 103 is most seriously affected by the bending stress, however, the material of the metal trace 105 is not ductile, and is asynchronous with the stretching motion of the surface of the flexible substrate 101, so that the metal trace 105 attached to the surface of the flexible substrate 101 is separated; by reducing the film thickness of the flexible substrate 101 corresponding to the trace area 103, the tensile stress generated when the trace area 103 is bent can be reduced to a certain extent, and the possibility that the metal trace 105 is separated from the surface of the flexible substrate 101 is further reduced.
As shown in fig. 2, the wiring area of the flexible OLED display panel provided by the present invention is in a bent state; the flexible OLED display panel comprises a flexible substrate 201, wherein a display area and a wiring area located at one end of the display area are defined on the surface of the flexible substrate 201; a TFT device layer 204 is prepared in the display area, and a metal wire 205 is prepared in the wire routing area; the trace region is bent to the back surface of the flexible substrate 201.
The film thickness of the flexible substrate 201 corresponding to the routing area is smaller than the film thickness of the flexible substrate 201 corresponding to the display area; the routing area comprises a connecting end connected with the display area and an adhesion end 208 far away from the connecting end, and the film thickness of the flexible substrate 201 corresponding to the adhesion end 208 is equal to the film thickness of the flexible substrate 201 corresponding to the display area; the metal trace 205 is prepared in a recessed area between the connection end and the bonding end 208.
The back of the flexible substrate 201 is provided with a back plate 206, the back plate 206 is used for bearing the flexible substrate 201, one end of the back plate 206, which is close to a routing area of the flexible substrate 201, is set to be an arc-shaped end, the routing area is attached along the arc-shaped end of the back plate 206 when being bent, and an adhesive end 208 of the routing area is fixed on the surface of the back plate 206.
In this scheme, on the basis of reducing the bending stress of the routing area, the metal routing 205 is buried in the recessed area between the connecting end and the bonding end 208, so that the routing metal can be prevented from being accidentally damaged by an external sharp object.
Example two
As shown in fig. 3 and 4, the routing area 303 of the flexible OLED display panel provided by the present invention shown in fig. 3 is in a flat state, and the routing area 303 of the flexible OLED display panel provided by the present invention shown in fig. 4 is in a bent state; the flexible OLED display panel comprises a flexible substrate 301, wherein a display area 302 and the wiring area 303 located at one end of the display area 302 are defined on the surface of the flexible substrate 301; a TFT device layer 304 is prepared in the display area 302, and a metal trace 305 is prepared in the trace area 303; the trace region 303 is bent to the back surface of the flexible substrate 301.
The back of the flexible substrate 301 is provided with a back plate 306, the back plate 306 is used for carrying the flexible substrate 301, one end of the back plate 306 close to the routing area 303 of the flexible substrate 301 is set to be an arc end, the routing area 303 is attached along the arc end of the back plate 306 when being bent, and the bonding end of the routing area 303 is fixed on the surface of the back plate 306.
The flexible substrate 301 corresponding to the routing region 303 includes a first surface on which the metal routing 305 is prepared, and a second surface opposite to the first surface, wherein the second surface is provided with strip-shaped grooves 309 distributed at intervals; the long side of the strip-shaped groove 309 is parallel to the connection end of the routing area 303.
In this scheme, a plurality of gaps are arranged at intervals on the back surface of the flexible substrate 301, and when the routing region 303 is bent, the gaps are closed, so that a part of the bending stress of the second surface can be absorbed, the bending stress of the first surface is reduced, and the metal routing 305 is prevented from being separated from the first surface.
For example, the longitudinal cross-sectional shape of the strip groove 309 is rectangular; the rectangular groove is adopted, the opening in the rectangular groove is large, and stress generated by bending the wiring area 303 can be absorbed to the maximum extent.
EXAMPLE III
As shown in fig. 5 and 6, the routing area of the flexible OLED display panel provided by the present invention shown in fig. 5 is in a flat state, and the routing area of the flexible OLED display panel provided by the present invention shown in fig. 6 is in a bent state; the flexible OLED display panel comprises a flexible substrate 401, wherein a display area 402 and the wiring area 403 positioned at one end of the display area 402 are defined on the surface of the flexible substrate 401; a TFT device layer 404 is prepared in the display area 402, and a metal trace 405 is prepared in the trace area 403; the trace region 403 is bent to the back surface of the flexible substrate 401.
The back surface of the flexible substrate 401 corresponding to the routing area 403 is provided with strip-shaped grooves 409 distributed at intervals.
The back of the flexible substrate 401 is provided with a back plate 406, the back plate 406 is used for carrying the flexible substrate 401, one end of the back plate 406, which is close to the routing area 403 of the flexible substrate 401, is set to be an arc-shaped end, when the routing area 403 is bent, the routing area is attached along the arc-shaped end of the back plate 406, and the adhesive end of the routing area 403 is fixed on the surface of the back plate 406.
The difference between this scheme and the flexible substrate 401 shown in fig. 3 and 4 is that the longitudinal cross-sectional shape of the strip-shaped groove 409 is triangular; the triangular groove is adopted, so that the stress generated by bending the wiring area 403 can be effectively absorbed, and after the wiring area 403 is bent, two opposite side walls in the triangular groove are attached to each other, so that a complete second surface is formed, and the second surface can be completely attached to the arc-shaped end of the back plate 406.
In accordance with the above object of the present invention, there is provided a flexible OLED display device including: the OLED display panel comprises an OLED display panel and an encapsulation layer prepared outside the OLED display panel; the OLED display panel includes: the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate; the TFT device layer is prepared in the display area of the flexible substrate; the light-emitting device layer is prepared on the surface of the TFT device layer; the metal routing is prepared in the routing area of the flexible substrate; the routing area is set to be a structure capable of reducing the surface bending stress of the routing area.
The working principle of the flexible OLED display device of the preferred embodiment is consistent with that of the OLED display panel of the preferred embodiment, and specific reference may be made to the working principle of the OLED display panel of the preferred embodiment, which is not described herein again.
The invention has the beneficial effects that: according to the OLED display panel provided by the invention, the bending area of the flexible substrate 201 is provided with the structure capable of reducing the bending stress, so that the metal wiring 205 is prevented from falling off in the bending process of the flexible substrate 201, and the product quality is improved; the flexible OLED display panel solves the technical problems that in the prior art, in order to hide the wiring area of the PI substrate base plate, the wiring area needs to be bent to the back of the PI substrate base plate, the bent part can generate large stress, the metal wiring 205 is easy to fall off, and the product quality is influenced.
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 (6)
1. A flexible OLED display panel, comprising:
the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate;
the TFT device layer is prepared in the display area of the flexible substrate;
the light-emitting device layer is prepared on the surface of the TFT device layer; and the number of the first and second groups,
the metal routing is prepared in the routing area of the flexible substrate;
the routing area is set to be a structure capable of reducing the surface bending stress of the routing area;
the film thickness of the flexible substrate corresponding to the wiring area is smaller than that of the flexible substrate corresponding to the display area;
the wiring area comprises a connecting end connected with the display area and a bonding end far away from the connecting end, and the thickness of the film layer of the flexible substrate corresponding to the bonding end is equal to that of the film layer of the flexible substrate corresponding to the display area.
2. The flexible OLED display panel according to claim 1, wherein the flexible substrate corresponding to the wire routing area comprises a first surface on which the metal wires are prepared and a second surface opposite to the first surface, wherein the second surface is provided with strip-shaped grooves distributed at intervals.
3. The flexible OLED display panel of claim 2, wherein the long side of the stripe groove is parallel to the connecting end of the trace area.
4. The flexible OLED display panel of claim 3, wherein the stripe-shaped groove has a rectangular longitudinal cross-sectional shape.
5. The flexible OLED display panel of claim 3, wherein the stripe-shaped groove has a triangular longitudinal cross-sectional shape.
6. A flexible OLED display device, comprising:
the OLED display panel comprises an OLED display panel and an encapsulation layer prepared outside the OLED display panel;
the OLED display panel includes:
the flexible substrate is provided with a display area and a wiring area positioned at one end of the display area in a defined mode; the wiring area can be bent to one side of the flexible substrate;
the TFT device layer is prepared in the display area of the flexible substrate;
the light-emitting device layer is prepared on the surface of the TFT device layer; and the number of the first and second groups,
the metal routing is prepared in the routing area of the flexible substrate;
the routing area is set to be a structure capable of reducing the surface bending stress of the routing area;
the film thickness of the flexible substrate corresponding to the wiring area is smaller than that of the flexible substrate corresponding to the display area;
the wiring area comprises a connecting end connected with the display area and a bonding end far away from the connecting end, and the thickness of the film layer of the flexible substrate corresponding to the bonding end is equal to that of the film layer of the flexible substrate corresponding to the display area.
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| CN201711201708.3A CN107742639B (en) | 2017-11-27 | 2017-11-27 | Flexible OLED display panel and display device |
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| CN107742639B true CN107742639B (en) | 2020-10-13 |
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| CN108597378A (en) | 2018-04-28 | 2018-09-28 | 京东方科技集团股份有限公司 | A kind of flexible base board and preparation method thereof, display device |
| CN108831908B (en) * | 2018-06-07 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting diode display |
| CN108877515A (en) * | 2018-06-07 | 2018-11-23 | 武汉华星光电半导体显示技术有限公司 | A kind of display panel, display module and electronic device |
| CN108878483A (en) * | 2018-06-22 | 2018-11-23 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic equipment |
| CN108831306A (en) * | 2018-06-22 | 2018-11-16 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic equipment |
| CN108898954B (en) * | 2018-07-18 | 2024-02-23 | 昆山国显光电有限公司 | Display panel and manufacturing method thereof |
| CN109360845A (en) * | 2018-10-24 | 2019-02-19 | 京东方科技集团股份有限公司 | Display base plate and preparation method thereof, display device and preparation method thereof, display device |
| CN109671718B (en) * | 2018-12-04 | 2021-02-23 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and manufacturing method thereof |
| CN109378339B (en) * | 2018-12-24 | 2021-09-24 | 武汉华星光电半导体显示技术有限公司 | Display panel with stress relieving structure and manufacturing method thereof |
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| CN109951950A (en) * | 2019-04-25 | 2019-06-28 | 京东方科技集团股份有限公司 | Flexible circuit board and display device |
| CN110297346B (en) * | 2019-06-28 | 2022-07-12 | 广州国显科技有限公司 | Display panel and manufacturing method thereof |
| CN110391279A (en) * | 2019-07-09 | 2019-10-29 | 武汉华星光电半导体显示技术有限公司 | A kind of display panel |
| CN110570764A (en) * | 2019-08-23 | 2019-12-13 | 武汉华星光电半导体显示技术有限公司 | display panel and manufacturing method thereof |
| CN110738930A (en) * | 2019-10-10 | 2020-01-31 | 云谷（固安）科技有限公司 | curled flexible display device |
| CN111446278B (en) * | 2020-04-13 | 2023-09-05 | 京东方科技集团股份有限公司 | Back membrane layer of flexible display device and flexible display device with same |
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| CN111724681A (en) * | 2020-06-09 | 2020-09-29 | 武汉华星光电半导体显示技术有限公司 | Substrate, preparation method thereof and display panel |
| CN111816080B (en) * | 2020-07-24 | 2022-05-24 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN112420746B (en) * | 2020-11-11 | 2022-08-23 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
| CN114311174A (en) * | 2021-12-30 | 2022-04-12 | 龙岩市锐美家装饰材料有限公司 | Preparation method of bendable melamine veneer |
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| KR101876540B1 (en) * | 2011-12-28 | 2018-07-10 | 삼성디스플레이 주식회사 | Flexible display apparatus and the method of manufacturing the same |
| CN103928398B (en) * | 2013-12-25 | 2017-01-18 | 厦门天马微电子有限公司 | Flexible display panel, method for manufacturing flexible display panel and flexible display device |
| KR102250053B1 (en) * | 2015-05-19 | 2021-05-11 | 삼성디스플레이 주식회사 | Flexible display apparatus and the manufacturing method thereof |
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| CN106972030A (en) * | 2017-03-30 | 2017-07-21 | 京东方科技集团股份有限公司 | A kind of preparation method of flexible display panels, display device and flexible display panels |
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