CN110729331A - Display panel and electronic device - Google Patents
Display panel and electronic device Download PDFInfo
- Publication number
- CN110729331A CN110729331A CN201910912805.6A CN201910912805A CN110729331A CN 110729331 A CN110729331 A CN 110729331A CN 201910912805 A CN201910912805 A CN 201910912805A CN 110729331 A CN110729331 A CN 110729331A
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- Prior art keywords
- protective layer
- display panel
- bending
- panel according
- electronic device
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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
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Structure Of Printed Boards (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display panel and an electronic device, wherein the display panel comprises: a display area; the bending area is provided with a first surface and a second surface which are oppositely arranged, the first surface is provided with a first protective layer, the second surface is provided with a second protective layer, the materials of the second protective layer and the first protective layer are both flexible materials, and the hardness of the materials of the second protective layer is greater than that of the materials of the first protective layer. The display panel and the electronic device can avoid the fracture of the connecting wire.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a display panel and an electronic device.
[ background of the invention ]
With the continuous maturation of flexible display technology, the bezel-less flexible display panel has become the mainstream of the market, and the process requirement thereof is higher, wherein the Pad Bending (Pad bonding) is used as the key process thereof, which directly affects the yield of the product.
As shown in fig. 1, the conventional display panel includes a display region 10 and a Bending region 20(Bending Area), one end of the Bending region 20 is connected to one end of the display region 10, and the other end is connected to a Flexible Printed Circuit (FPC) 60 through a Chip On Film (COF) 50. A support 70' is also provided between the two ends of the bending region 20. The outer surface of the bending region 20 is provided with a protective layer 30' made of a photosensitive adhesive.
Wherein the bending region 20 includes a plurality of connection lines connected to the driving lines of the display region, the connection lines being used to input signals on the FPC into the display region. Referring to fig. 2, when the display panel is in a bent state, the stress (i.e., bending stress) distribution of the bending region 20 is specifically shown as f1 to fn, however, due to the radial force generated by the photosensitive adhesive, and the small force is not enough to offset the bending stress, the stress of the connection lines in the bending region is not uniform during the bending process, and the connection lines are broken.
Therefore, it is desirable to provide a display panel and an electronic device to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a display panel and an electronic device, which can avoid the fracture of connecting wires.
To solve the above technical problem, the present invention provides a display panel, including:
a display area;
the bending area is provided with a first surface and a second surface which are oppositely arranged, wherein the first surface is provided with a first protective layer, the second surface is provided with a second protective layer, the materials of the second protective layer and the first protective layer are both flexible materials, and the hardness of the materials of the second protective layer is greater than that of the materials of the first protective layer.
The invention also provides an electronic device comprising the display panel.
The display panel and the electronic device comprise a display area; the bending area is provided with a first surface and a second surface which are oppositely arranged, the first surface is provided with a first protective layer, the second surface is provided with a second protective layer, the materials of the second protective layer and the first protective layer are flexible materials, and the hardness of the material of the second protective layer is greater than that of the material of the first protective layer, so that the acting force towards the direction of the circle center is increased in the bending process, the bending area is integrally subjected to the acting force which is opposite in direction and close in size, the connecting line is prevented from being broken due to uneven stress, and the product yield is improved.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a conventional display panel;
FIG. 2 is a schematic diagram of a conventional bending region under stress;
FIG. 3 is a schematic structural diagram of a display panel according to the present invention;
FIG. 4 is a top view of a display panel according to the present invention;
FIG. 5 is a first bottom view of the display panel of the present invention;
FIG. 6 is a second bottom view of the display panel of the present invention;
FIG. 7 is a schematic view of the force applied to the bending region according to the present invention.
[ 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. 3 to 7, fig. 3 is a schematic structural diagram of a display panel according to the present invention.
As shown in fig. 3, the display panel of the present invention includes a display region 10 and a bending region 20, wherein the display region 10 is used for displaying a picture, one end of the bending region 20 is connected to one end of the display region 10, and the other end thereof is connected to a Flexible Printed Circuit (FPC) 60 through a Chip On Film (COF) 50.
The bending region 20 has a first surface (i.e., an outer surface) and a second surface (i.e., an inner surface) opposite to each other, the first surface being exposed to the outside after bending, the second surface being opposite to the first surface, and the first protective layer 30 being disposed on the first surface (the outer surface). That is, in a top view, it is equivalent to disposing the first protection layer 30 on the front surface of the bending region 20, and referring to fig. 4, the first protection layer 30 may cover the whole bending region 20. In one embodiment, a photosensitive glue is applied, for example, over the entire bend region 20 to obtain the first protective layer 30.
The second surface (inner surface) of the bending region 20 is provided with a second protective layer 40, and in combination with fig. 5, that is, in a plan view, the second protective layer 40 is provided on the back surface of the bending region 20. The material of the second protection layer 40 and the material of the first protection layer 30 are both flexible materials, and the hardness of the material of the second protection layer 40 is greater than that of the material of the first protection layer 30. That is, the second protective layer 40 and the first protective layer 30 are flexible materials with different hardness.
In one embodiment, the material of the first protection layer 30 may be a photosensitive adhesive, and the material of the second protection layer 40 may include at least one of PET plastic, PMMA and PDMS. The second protective layer 40 may be attached to the second surface of the bending region 20, and the first protective layer 30 may be disposed on the first surface of the bending region 20 by means of glue.
Referring to fig. 5, the second protection layer 40 may cover the entire bending region 20, in order to better prevent the connection lines from being broken. Wherein the width d of the second protection layer 40 is greater than or equal to the width of the bending region 20. The length L of the second protection layer 40 is equal to the length of the bending region 20.
In order to further prevent the connection lines from being broken, referring to fig. 6, a plurality of holes 41 are formed on the second protective layer 40. Because can produce great internal stress at the in-process of buckling, through setting up the hole, can release the internal stress, avoid the part position atress of connecting wire too big and produce the fracture, this hole can be the through-hole to release stress better. It can be understood that the holes may be arranged at intervals or overlapped, the arrangement of the holes may be random arrangement or regular arrangement, and the density of the holes is not limited. That is, the density, arrangement and shape of the holes in plan view are not intended to limit the present invention.
In one embodiment, the second protective layer 40 has a thickness ranging from 60um to 100um in order to better prevent the connection line from being broken. In one embodiment, the thickness of the second protective layer 40 is equal to the thickness of the first protective layer 30. Wherein the thickness range of the first protective layer 30 is also 60um-100 um.
In a specific bending process, referring to fig. 7, the bending region is subjected to forces F1 to Fn (hereinafter referred to as bending stresses) away from the center of the circle, and since the second protective layer and the first protective layer are made of flexible materials, both the second protective layer and the first protective layer generate forces (hereinafter referred to as counteracting forces) toward the center of the circle, that is, the sum of the forces applied to the bending region toward the center of the circle is shown as F1 to Fn, where F1 to Fn are the sum of the forces generated by the second protective layer and the first protective layer, in other words, the force applied to the inner surface of the bending region 20 is F1 to Fn, the force applied to the outer surface of the bending region 20 is F1 to Fn, the directions of F1 to Fn are opposite to the directions of F1 to Fn, and since the hardness of the material of the second protective layer is greater than that of the first protective layer, the counteracting force can be increased, so that the magnitudes of F1 to Fn are close to those of F1 to Fn, referring to fig. 7, the force applied to the inner surface of the bending region 20 is F1 to Fn, the force applied to the outer surface of the bending region 20 is F1 to Fn, and the direction of F1 to Fn is opposite to the direction of F1 to Fn, that is, in the bending state, the inner surface and the outer surface of the bending region 20 are applied with forces having opposite directions and similar magnitudes, so that the single-side force applied in the bending process of the bending region can be reduced or cancelled, and the problem of breaking the connection wire due to uneven force can be prevented.
A support 70 is also provided between the two ends of the bending region 20, and the support 70 is located inside the two ends.
The first protection layer is arranged on the outer surface of the bending area, the second protection layer is arranged on the inner surface of the bending area, the first protection layer is made of flexible materials, and the hardness of the materials of the second protection layer is greater than that of the materials of the first protection layer, so that the acting force towards the direction of the circle center can be increased in the bending process, the bending area is integrally subjected to the acting force which is opposite in direction and close in size, the problem that the connecting wire is broken due to uneven stress is avoided, and the product yield is improved.
The invention also provides an electronic device, which can be an electronic device such as a mobile phone, a tablet computer, a personal computer and the like, and comprises any one of the display panels.
The display panel and the electronic device comprise a display area; the bending area is provided with a first protection layer on the outer surface of the bending area, a second protection layer is arranged on the inner surface of the bending area, the materials of the second protection layer and the first protection layer are both flexible materials, and the hardness of the material of the second protection layer is greater than that of the material of the first protection layer, so that the acting force towards the direction of the circle center is increased in the bending process, the bending area is enabled to integrally receive the acting force with opposite directions and approximate sizes, the fracture of the connecting wire caused by the uneven stress of the bending area is avoided, and the yield of products is improved.
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 (10)
1. A display panel, comprising:
a display area;
the bending area is provided with a first surface and a second surface which are oppositely arranged, wherein the first surface is provided with a first protective layer, the second surface is provided with a second protective layer, the material of the second protective layer and the material of the first protective layer are both flexible materials, and the hardness of the material of the second protective layer is greater than that of the material of the first protective layer.
2. The display panel according to claim 1,
the material of the second protective layer comprises at least one of PET plastic, PMMA and PDMS, and the material of the first protective layer is photosensitive glue.
3. The display panel according to claim 1,
and a plurality of holes are formed in the second protective layer.
4. The display panel according to claim 1,
the second protective layer covers all the bending areas.
5. The display panel according to claim 4,
the width of the second protective layer is larger than or equal to that of the bending area.
6. The display panel according to claim 4,
the length of the second protection layer is equal to that of the bending area.
7. The display panel according to claim 1,
the thickness of the second protective layer is equal to the thickness of the first protective layer.
8. The display panel according to claim 1,
the thickness range of the second protective layer is 60um-100 um.
9. The display panel according to claim 1,
in a bending state, the stress direction of the outer surface of the bending area is opposite to the stress direction of the inner surface of the bending area.
10. An electronic device, characterized by comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912805.6A CN110729331A (en) | 2019-09-25 | 2019-09-25 | Display panel and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912805.6A CN110729331A (en) | 2019-09-25 | 2019-09-25 | Display panel and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110729331A true CN110729331A (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910912805.6A Pending CN110729331A (en) | 2019-09-25 | 2019-09-25 | Display panel and electronic device |
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| CN (1) | CN110729331A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148380A (en) * | 2018-08-21 | 2019-01-04 | 武汉华星光电半导体显示技术有限公司 | Display panel, display module and electronic device |
| CN208622355U (en) * | 2018-07-18 | 2019-03-19 | 昆山国显光电有限公司 | Display panel and display device |
| CN109768185A (en) * | 2019-02-27 | 2019-05-17 | 武汉华星光电半导体显示技术有限公司 | A kind of display panel |
-
2019
- 2019-09-25 CN CN201910912805.6A patent/CN110729331A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208622355U (en) * | 2018-07-18 | 2019-03-19 | 昆山国显光电有限公司 | Display panel and display device |
| CN109148380A (en) * | 2018-08-21 | 2019-01-04 | 武汉华星光电半导体显示技术有限公司 | Display panel, display module and electronic device |
| CN109768185A (en) * | 2019-02-27 | 2019-05-17 | 武汉华星光电半导体显示技术有限公司 | A kind of display panel |
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Application publication date: 20200124 |
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