CN110164310B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN110164310B CN110164310B CN201910444010.7A CN201910444010A CN110164310B CN 110164310 B CN110164310 B CN 110164310B CN 201910444010 A CN201910444010 A CN 201910444010A CN 110164310 B CN110164310 B CN 110164310B
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- adhesive
- display panel
- flexible display
- substrate
- base plate
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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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
Abstract
The present disclosure provides a flexible display panel and a display device, the flexible display panel including: a back plate; a substrate base plate disposed on the backplate; the first bonding layer is arranged between the back plate and the substrate base plate, and is coated with a first adhesive for bonding the back plate and the substrate base plate; the second adhesive layer is arranged between the back plate and the substrate base plate, coated with a second adhesive, and used for adhering the back plate and the substrate base plate and mutually adhered and connected with the first adhesive, so that bending stress received by the flexible display panel and each film layer or substrate of the display device when the flexible display panel and each film layer or substrate are bent is dispersed, the falling-off phenomenon of each film layer or substrate is avoided, and the service life of the flexible display panel and the service life of the display device are prolonged.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a display device.
Background
In recent years, Organic Light Emitting Diode (OLED) Display devices are gradually popularized in the mobile phone and television markets, the yield is greatly improved, the status of the next generation Display technology is unimpacted, and flexible Display devices based on OLEDs are an important research and development direction of the future Display technology. Optical Cement (OCA) is usually adopted to attach between each membrane layer of the flexible screen, and as the modulus of the cement material is low, viscous rheology is easy to occur under the action of external load, so that the hardness of the flexible screen is reduced.
In the in-service use, flexible display panel often can be buckled, and when flexible display panel did curl or expand when warping, the material of different rete or base plate is different, and anti ability difference of buckling is great, and stress is continuously exerted and will be caused the great rete separation of stress of bending among the OLED device, appears the obscission, arouses OLED display panel physics and structural destruction and leads to separating each other, and then makes OLED display device's performance be difficult to obtain guaranteeing.
In summary, when the conventional flexible display panel is bent, the film layer with large bending stress is easy to fall off. Therefore, it is desirable to provide a flexible display panel and a display device to improve the defect.
Disclosure of Invention
The disclosed embodiment provides a flexible display panel and a display device, which are used for solving the problem that a film layer with large bending stress is easy to fall off when the conventional flexible display panel is bent.
The disclosed embodiment provides a flexible display panel, including:
a back plate;
a substrate base plate disposed on the backplate;
the first bonding layer is arranged between the back plate and the substrate base plate, and is coated with a first adhesive for bonding the back plate and the substrate base plate; and
and the second adhesive layer is arranged between the back plate and the substrate base plate, and is coated with a second adhesive which is used for bonding the back plate and the substrate base plate and is mutually bonded and connected with the first adhesive.
According to an embodiment of the present disclosure, the first adhesive layer and the second adhesive layer are both in contact with a side surface of the base substrate close to the back plate.
According to an embodiment of the present disclosure, the area of the second adhesive layer occupies a surface area of the substrate base plate on a side close to the back plate in a proportion range of 70% to 90%.
According to an embodiment of the present disclosure, the first adhesive is an optically clear adhesive and the second adhesive is an elastomeric adhesive.
According to an embodiment of the present disclosure, a substrate base plate includes a folded portion and an unfolded portion, the unfolded portion being disposed at both sides of the substrate base plate, and the folded portion being disposed between the unfolded portions.
According to an embodiment of the present disclosure, the first adhesive layer is disposed on the non-folded portion, the second adhesive layer is disposed on the folded portion, and the first adhesive layer and the second adhesive layer have the same thickness.
According to an embodiment of the present disclosure, the first adhesive layer covers the folded portion and the unfolded portion, and the first adhesive layer is provided with a groove at the folded portion, and the second adhesive layer is provided in the groove.
According to an embodiment of the present disclosure, the flexible display panel further includes a display device layer disposed on a side of the substrate away from the backplane.
According to an embodiment of the present disclosure, the material of the substrate base plate includes polyimide.
The present disclosure also provides a display device including the flexible display panel as described above.
The beneficial effects of the disclosed embodiment are as follows: according to the embodiment of the disclosure, the first bonding layer and the second bonding layer are arranged between the back plate and the substrate base plate of the flexible display panel, the first bonding layer is coated with the first bonding agent, the second bonding layer positioned at the folding part of the back plate is coated with the second bonding agent, when the flexible display panel or the display device is bent, the second bonding agent is deformed by bending stress and is separated from the back plate and the substrate base plate which are mutually bonded, and the first bonding agents positioned at two sides continuously bond the back plate and the substrate base plate, so that the bending stress received by each film layer or each substrate of the flexible display panel and the display device when the flexible display panel and the display device are bent is dispersed, the phenomenon that each film layer or each substrate falls off is avoided, and the service life of the flexible display panel and the display device is prolonged.
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 of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic cross-sectional structure diagram of a flexible display panel according to an embodiment of the disclosure;
fig. 2 is a schematic cross-sectional structure view of a flexible display panel according to an embodiment of the disclosure in a bent state;
fig. 3 is a schematic cross-sectional structure diagram of a flexible display panel according to a second embodiment of the disclosure;
fig. 4 is a schematic cross-sectional structure view of a flexible display panel according to a second embodiment of the disclosure in a bent state.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure. In the drawings, elements having similar structures are denoted by the same reference numerals.
The disclosure is further described with reference to the following drawings and specific embodiments:
the first embodiment is as follows:
the present disclosure provides a flexible display panel, which is described in detail below with reference to fig. 1 to 2.
As shown in fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a flexible display panel 100 according to an embodiment of the present disclosure, where the flexible display panel 100 includes: a back plate 110, a first adhesive layer 120, a second adhesive layer 130, and a base substrate 140. Wherein the substrate base plate 140 is disposed on the back plate 110, the first adhesive layer 120 is disposed between the back plate 110 and the substrate base plate 140, and the first adhesive layer 120 is coated with a first adhesive for bonding the back plate 110 and the substrate base plate 140; the second adhesive layer 130 is disposed between the back plate 110 and the substrate base plate 140, and the second adhesive layer 130 is coated with a second adhesive for bonding the back plate 110 and the substrate base plate 140 and is adhesively connected to the first adhesive.
As shown in fig. 1, the first adhesive layer 120 and the second adhesive layer 130 are both in contact with a side surface of the second substrate 140 close to the back plate 110.
Specifically, in order to ensure that the second adhesive on the second adhesive layer 130 is sufficiently contacted with the back plate 110 and the substrate base plate 140, the area of the second adhesive layer 130 occupies a surface area of the substrate base plate 140 on a side close to the back plate 110, and the ratio is in a range of 70% to 90%.
In this embodiment, the first adhesive is an optically clear adhesive and the second adhesive is an elastomeric adhesive.
In particular, the elastic adhesive may be a pop-top adhesive or a pressure sensitive adhesive.
As shown in fig. 1, the base substrate 110 includes a folded portion 112 and an unfolded portion 111, the unfolded portion 111 is disposed at both sides of the base substrate 110, and the folded portion 112 is disposed between the unfolded portions 111.
Specifically, the first adhesive layer 120 is disposed on the folding portion 111, the first adhesive layer 120 is disposed on both sides of the folding portion 111, the second adhesive layer 130 is disposed on the non-folding portion 112, and the thicknesses of the first adhesive layer 120 and the second adhesive layer 130 are the same, so that the film layer of the base substrate 140 is kept flat while the base substrate 140 is firmly bonded to the back panel 110.
Preferably, the flexible display panel 100 further includes a display device layer (not shown), and the display device layer is disposed on the substrate base plate 140 at a side far from the back plate 110.
Preferably, the material of the substrate base plate 140 includes polyimide, so that the substrate base plate 140 has good insulating performance and bending resistance.
As shown in fig. 2, fig. 2 is a schematic cross-sectional structure diagram of the flexible display panel 100 provided in the embodiment of the disclosure in a bent state.
After the flexible display panel 100 is bent, the bending portion 112, the second adhesive layer 130 and the substrate base plate 140 disposed on the back plate 111 all generate corresponding deformation after receiving bending stress, the second adhesive coated on the second adhesive layer 130 is an elastic adhesive, and when the second adhesive is subjected to bending stress, the viscosity of the second adhesive is gradually reduced until the second adhesive is separated from the back plate 110 and the substrate base plate 140 which are adhered to each other, so that a gap is generated; because of the existence of the gap, the bending parts of the substrate base plate 140 and the backboard 110 still have moving margins in the gap, and therefore the bending parts cannot be extruded with adjacent films, so that the bending stress among other films such as the backboard 110, the substrate base plate 140 and the display device layer is dispersed, and the unrecoverable falling-off phenomenon between the adjacent films or the substrates is avoided. At this time, the first adhesive disposed on the non-folding portion 111 is an optically transparent adhesive, and at this time, the adhesive can still maintain the viscosity, so as to adhere the two sides of the back plate 110 and the substrate 140 to each other, thereby preventing the back plate 110 and the substrate 140 from falling off.
According to the embodiment of the disclosure, the first bonding layer 120 and the second bonding layer 130 are arranged between the back plate 110 and the substrate base plate 140 of the flexible display panel 100, the first bonding layer 120 is coated with the first bonding agent, the second bonding layer 130 positioned at the back plate folding part 112 is coated with the second bonding agent, when the flexible display panel 100 is bent, the second bonding agent is deformed by bending stress and is separated from the back plate 110 and the substrate base plate 140 which are bonded with each other, and the first bonding agents positioned at two sides continuously bond the back plate 110 and the substrate base plate 140, so that the bending stress received by each film layer or substrate of the flexible display panel 100 during bending is dispersed, the phenomenon that each film layer or substrate falls off is avoided, and the service life of the flexible display panel 100 is prolonged.
Example two:
the present disclosure provides a flexible display panel, which is described in detail with reference to fig. 3 to 4.
As shown in fig. 3, fig. 3 is a schematic cross-sectional structure diagram of a flexible display panel 200 according to an embodiment of the disclosure, where the flexible display panel 200 includes: a back plate 210, a first adhesive layer 220, a second adhesive layer 230, and a base substrate 240. Wherein the base substrate 240 is disposed on the back plate 210, the first adhesive layer 220 is disposed between the back plate 210 and the base substrate 240, and the first adhesive layer 220 is coated with a first adhesive for bonding the back plate 110 and the base substrate 240; the second adhesive layer 230 is disposed between the back plate 210 and the substrate base plate 240, and a second adhesive is coated on the second adhesive layer 230 to adhere the back plate 210 and the substrate base plate 240 and to be adhesively connected to each other with the first adhesive.
As shown in fig. 3, the first adhesive layer 220 and the second adhesive layer 230 are both in contact with a side surface of the second substrate 240 close to the back plate 210.
Specifically, in order to ensure that the second adhesive on the second adhesive layer 230 is sufficiently contacted with the back plate 210 and the substrate base plate 240, the area of the second adhesive layer 230 occupies a surface area of the substrate base plate 240 on the side close to the back plate 210, and the proportion ranges from 70% to 90%.
In this embodiment, the first adhesive is an optically clear adhesive and the second adhesive is an elastomeric adhesive.
In particular, the elastic adhesive may be a pop-top adhesive or a pressure sensitive adhesive.
As shown in fig. 3, the base substrate 210 includes a folded portion 212 and an unfolded portion 211, the unfolded portion 211 is disposed at both sides of the base substrate 210, and the folded portion 212 is disposed between the unfolded portions 211.
Specifically, the first adhesive layer 220 covers the folded portion 212 and the unfolded portion 211, and the first adhesive layer 220 is provided with a groove at the folded portion, and the second adhesive layer 230 is provided in the groove.
As shown in fig. 3, the thickness of the first adhesive layer 220 is higher on both sides of the non-folded portion 211 than on the folded portion 212, thereby forming a groove in which the second adhesive layer 230 is disposed. The height of the second adhesive layer 230 is maintained to be identical to the height of the first adhesive layer 220 at the non-folded portion 211. The stability of the adhesion between the back plate 210 and the base substrate 240 is improved by increasing the contact area of the first adhesive layer 220 with the back plate 210.
Preferably, the flexible display panel 200 further includes a display device layer (not shown), and the display device layer is disposed on the substrate 240 at a side away from the backplate 210.
Preferably, the material of the base substrate 240 includes polyimide, so that the base substrate 240 has good insulating performance and bending resistance.
As shown in fig. 4, fig. 4 is a schematic cross-sectional structure diagram of the flexible display panel 200 according to the embodiment of the disclosure in a bent state.
After the flexible display panel 200 is bent, the bending portion 212, the second adhesive layer 230 and the substrate base plate 240 which are disposed on the back plate 211 are deformed correspondingly when receiving bending stress, and the second adhesive coated on the second adhesive layer 230 is an elastic adhesive, and when receiving the bending stress, the viscosity of the elastic adhesive is gradually reduced until the elastic adhesive is separated from the substrate base plate 240 which is mutually bonded, so that a gap is generated; because of the existence of the gap, the bent portion of the substrate base plate 240 still has a moving margin in the gap, and therefore, the bent portion of the substrate base plate 240 is not extruded with the adjacent film layers, so that the bending stress among other film layers such as the back plate 210, the substrate base plate 240, the display device layer and the like is dispersed, and the unrecoverable falling-off phenomenon between the adjacent film layers or the substrate is avoided. At this time, the first adhesive disposed on the non-folding portion 211 is an optically transparent adhesive, and at this time, the adhesive property can be maintained, so that the two sides of the back plate 210 and the substrate 240 are adhered to each other, and the back plate 210 and the substrate 240 are prevented from falling off.
According to the embodiment of the disclosure, the first adhesive layer 220 and the second adhesive layer 230 are arranged between the back plate 210 and the substrate base plate 240 of the flexible display panel 200, the first adhesive layer 220 is coated with the first adhesive, the second adhesive layer 230 positioned at the back plate folding part 212 is coated with the second adhesive, when the flexible display panel 200 is bent, the second adhesive is deformed by bending stress and is separated from the back plate 210 and the substrate base plate 240 which are mutually adhered, and the first adhesive positioned at two sides continuously adheres the back plate 210 and the substrate base plate 240, so that the bending stress received by each film layer or substrate of the flexible display panel 200 during bending is dispersed, the phenomenon that each film layer or substrate falls off is avoided, and the service life of the flexible display panel 200 is prolonged.
The present disclosure also provides a display device, which includes the flexible display panel provided in the above embodiments, and the display device can achieve the same technical effects as the flexible display panel, and details are not repeated here.
In summary, although the present disclosure has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so that the scope of the present disclosure is defined by the appended claims.
Claims (6)
1. A flexible display panel, comprising:
a back panel including a folded portion and a non-folded portion, the non-folded portion being disposed at both sides of the folded portion;
a substrate base plate disposed on the backplate;
the first bonding layer is arranged between the back plate and the substrate base plate, is prepared from a first bonding agent, is an optically transparent bonding agent and is used for bonding the back plate and the substrate base plate; and
the second adhesive layer is arranged between the back plate and the substrate base plate, is prepared from a second adhesive, is an elastic adhesive, and is used for bonding the back plate and the substrate base plate and is mutually bonded and connected with the first adhesive;
wherein the first adhesive is provided with a groove corresponding to the folded portion, and the second adhesive is provided in the groove.
2. The flexible display panel according to claim 1, wherein the second adhesive layer has an area occupying a surface area of the substrate base plate on a side close to the back plate in a proportion ranging from 70% to 90%.
3. The flexible display panel of claim 2, wherein the first adhesive layer overlies the folded portion and the unfolded portion.
4. The flexible display panel of claim 1, further comprising a display device layer disposed on the substrate side of the substrate away from the backplane.
5. The flexible display panel of claim 1, wherein the material of the base substrate comprises polyimide.
6. A display device comprising the flexible display panel according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444010.7A CN110164310B (en) | 2019-05-27 | 2019-05-27 | Flexible display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910444010.7A CN110164310B (en) | 2019-05-27 | 2019-05-27 | Flexible display panel and display device |
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| CN110164310A CN110164310A (en) | 2019-08-23 |
| CN110164310B true CN110164310B (en) | 2022-04-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110782788B (en) * | 2019-10-14 | 2021-09-03 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and display device |
| CN112885232B (en) * | 2019-11-29 | 2024-04-12 | 海信视像科技股份有限公司 | Display device |
| CN111210723B (en) * | 2020-01-13 | 2022-06-03 | 京东方科技集团股份有限公司 | Flexible display assembly, rollable display device and preparation method thereof |
| CN113539075A (en) * | 2020-04-20 | 2021-10-22 | 京东方科技集团股份有限公司 | Flexible display structure, manufacturing method thereof and display device |
| CN112908162B (en) * | 2021-01-20 | 2022-09-06 | 昆山国显光电有限公司 | Display module assembly capable of being wound and display device |
| CN115100965B (en) * | 2022-08-04 | 2024-02-20 | 昆山国显光电有限公司 | Display device |
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