CN111326542A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN111326542A CN111326542A CN201811526094.0A CN201811526094A CN111326542A CN 111326542 A CN111326542 A CN 111326542A CN 201811526094 A CN201811526094 A CN 201811526094A CN 111326542 A CN111326542 A CN 111326542A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims description 47
- 239000010410 layer Substances 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 20
- 239000011247 coating layer Substances 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000000059 patterning Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 239000004642 Polyimide Substances 0.000 description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229920001621 AMOLED Polymers 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- -1 Polydimethylsiloxane Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- 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
- H10K59/1201—Manufacture or treatment
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to a display panel, a manufacturing method thereof and a display device. The display panel comprises a plurality of pixel islands which are arranged in rows and columns along a first direction and a second direction which are intersected, and each pixel island comprises a plurality of sub-pixels; the stretchable flat cable comprises a main body part and two connecting ends extending out of the main body part, the main body part comprises connecting wires distributed spirally, and the stretchable flat cable is electrically connected with two adjacent pixel islands through the two connecting ends. According to the invention, the spiral stretchable flat cable is arranged between two adjacent pixel islands, so that the main body part of the stretchable flat cable can be gradually unfolded and stretched from a spiral winding state, and thus, extra wiring length can be provided between the adjacent pixel islands, and the display panel can realize plane stretching display or curved surface stretching display.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
In order to realize stretching display, spherical display and wearable display fitting with a human body curved surface, stretching capacity needs to be provided among screen pixels. Currently, an Active Matrix Organic Light Emitting Diode (AMOLED) display screen mostly uses glass and Polyimide (PI) as a substrate, and the substrate itself is a non-stretchable material, so that the display screen is difficult to realize stretch display or spherical display.
Disclosure of Invention
The invention aims to provide a display panel, a manufacturing method thereof and a display device.
In one aspect, an embodiment of the present invention provides a display panel, including: the pixel islands are arranged in rows and columns along a first direction and a second direction which are intersected, and each pixel island comprises a plurality of sub-pixels; the stretchable flat cable comprises a main body part and two connecting ends extending out of the main body part, wherein the main body part comprises connecting wires distributed spirally, and the stretchable flat cable is electrically connected with two adjacent pixel islands through the two connecting ends.
According to an aspect of an embodiment of the present invention, the main body portion of the stretchable flat cable includes a first spiral flat cable and a second spiral flat cable intersecting at a node point, the first spiral flat cable spirally extends from the node point to the first connection end, and the second spiral flat cable spirally extends from the node point to the second connection end.
According to an aspect of the embodiment of the invention, when the first spiral flat cable and the second spiral flat cable spirally extend from the node to the first connection end and the second connection end, respectively, the spiral radius of the first spiral flat cable and the second spiral flat cable gradually increases.
According to an aspect of the embodiment of the invention, the portions of the first connection terminal and the second connection terminal of the stretchable flat cable, which are connected to the pixel islands, are rounded.
According to an aspect of the embodiment of the present invention, the first connection end and the second connection end of the stretchable cord are located on the same straight line passing through the node.
According to an aspect of the embodiment of the present invention, the stretchable flat cable is internally laid with one or more first metal wires, and the two or more first metal wires are arranged side by side and/or stacked inside the stretchable flat cable.
On the other hand, the embodiment of the invention also provides a manufacturing method of the display panel, which comprises the following steps: providing a flexible substrate; forming TFT back plates distributed in an array mode on a flexible substrate, forming a metal lead between every two adjacent TFT back plates, laying an OLED device layer on the TFT back plates, wherein the metal lead comprises first metal leads distributed in a spiral mode; forming an encapsulation layer on the OLED device layer and the metal wire; the packaging layer is subjected to graphical processing, and a display panel with a plurality of pixel islands and a stretchable flat cable connected between two adjacent pixel islands is obtained, wherein the pixel islands are formed by a flexible substrate and the packaging layer covering a TFT backboard and an OLED device layer laid on the TFT backboard, the stretchable flat cable is formed by the flexible substrate and the packaging layer covering a first metal wire, the stretchable flat cable comprises a main body part and two connecting ends extending out of the main body part, and the main body part comprises connecting wires distributed spirally.
According to an aspect of the embodiment of the present invention, the number of the first metal wires is one or more than two, and the two or more than two first metal wires are arranged side by side and/or stacked inside the stretchable flat cable.
According to an aspect of the embodiment of the invention, the manufacturing method further comprises: forming an elastic coating layer on the display panel, and curing; and carrying out patterning treatment on the display panel with the elastic coating layer after the curing treatment so as to form pixel islands covered by the elastic coating layer and stretchable flat cables covered by the elastic coating layer.
On the other hand, the embodiment of the invention also provides a display device, which comprises any one of the display panels.
According to the display panel provided by the embodiment of the invention, the main body part and the two connecting ends extending from the main body part are spirally distributed, so that the stretchable flat cable can be gradually unfolded and stretched from a spirally wound state between two adjacent pixel islands, an extra routing length is provided, and the display panel can realize plane stretching display or curved surface stretching display.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a stretchable flat cable in the display panel shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the display panel shown in FIG. 1 along direction A-A;
FIG. 4 is a schematic longitudinal cross-sectional view of an arrangement of first metal wires within the stretchable row cable shown in FIG. 2;
FIG. 5 is a schematic longitudinal cross-sectional view of another arrangement of first metal wires in the stretchable row cable shown in FIG. 2;
fig. 6 is a schematic flow chart diagram illustrating a manufacturing method of a display panel according to an embodiment of the present invention.
Wherein:
1-stretchable flat cable; 10-a body portion; 101-a first spiral row line; 102-a second spiral row line; 11-a first connection end; 12-a second connection end; an O-node; c1 — first metal wire;
2-pixel islands; r-red sub-pixel; g-green sub-pixel; b-blue sub-pixel; x-a first direction; y-a second direction; a-a flexible substrate; b-an OLED device layer; c 2-second metal wire; d-an encapsulation layer; e-an elastic coating layer; f-insulating material layer.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
For better understanding of the present invention, the following describes the display panel, the manufacturing method thereof and the display device provided by the present invention in detail with reference to fig. 1 to 6.
Referring to fig. 1 and fig. 2 together, an embodiment of the invention provides a display panel, which includes a plurality of pixel islands 2 and a stretchable cable 1 disposed between two adjacent pixel islands.
The plurality of pixel islands 2 are arranged in rows and columns along the intersecting first and second directions X and Y, and each pixel island 2 includes a plurality of sub-pixels, such as a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B.
The stretchable flat cable 1 includes a main body portion 10 and two connection ends extending from the main body portion 10, the main body portion 10 includes connection lines distributed spirally, and the stretchable flat cable 1 is electrically connected to two adjacent pixel islands 2 through the two connection ends.
The first direction X and the second direction Y may be intersected at any preset angle, and optionally, an included angle between the first direction X and the second direction Y is 90 degrees, so that the plurality of pixel islands 2 may be repeatedly arranged along the row direction and the column direction, and the pixel island structure is simple in structure and convenient to manufacture.
The shape of the pixel island 2 may be square, circular, oval, other polygons, etc., and each pixel island 2 may be provided with four connecting portions respectively connected to the upper, lower, left, and right pixel islands 2 thereof by the stretchable flat cable 1.
According to the display panel provided by the embodiment of the invention, the main body part 10 which is spirally distributed and the two connecting ends which extend from the main body part 10 are arranged, so that the stretchable flat cable 1 can be gradually unfolded and stretched from a spirally wound state between two adjacent pixel islands 2, an extra wiring length is provided, and the display panel can realize plane stretching display or curved surface stretching display.
The specific structure of the display panel is described in further detail below with reference to the accompanying drawings.
Referring again to fig. 1 and 2, the main body 10 of the stretchable flat cable 1 includes a first spiral flat cable 101 and a second spiral flat cable 102 intersecting at a node O, the first spiral flat cable 101 spirally extends from the node O to form a first connection end 11, and the connection line of the second spiral flat cable 102 spirally extends from the node O to form a second connection end 12.
The first spiral flat cable 101 and the second spiral flat cable 102 may be formed by a node O spiraling in a clockwise direction, as shown in fig. 2, or may be formed by spiraling in a counterclockwise direction, depending on specific arrangement requirements.
Further, when the first spiral flat cable 101 extends spirally from the node O to the first connection end 11, the spiral radius of the first spiral flat cable 101 gradually increases, as shown by the dashed radius in fig. 2. When the second spiral row line 102 extends spirally from the node O to the second connection end 12, the spiral radius of the second spiral row line 102 gradually increases, as shown by the solid radius in fig. 2. Wherein, the spiral radius is the length of the connecting line between the node O and the point on the spiral flat cable.
The degree of increase in the spiral radius with increase in the spiral angle may be a linear change, an equal ratio change, or another form of change, for example, the portions of the first spiral flat cable 101 and the second spiral flat cable 102 spirally extending from the node O to the first connection end 11 and the second connection end 12 may be Fibonacci spirals formed according to a Fibonacci number Sequence (Fibonacci Sequence), the drawing rule of which is that a 90-degree sector is drawn in a rectangle formed by squares whose sides are Fibonacci numbers, and the connected arcs are Fibonacci spirals whose degrees of change in the spiral radius are determined according to the Fibonacci number Sequence.
In addition, the more the number of the spiral turns of the first spiral flat cable 101 and the second spiral flat cable 102 is, the higher the stretchable degree of the stretchable flat cable 1 is, and the number of the spiral turns may be determined according to factors such as the arrangement pitch of the pixel islands 2, the process precision, the width and the number of the carried first metal wires c1, and the like.
Further, the portions of the first connection end 11 and the second connection end 12 connected to the pixel island 2 are smoothly transited, for example, the connected portions are distributed in an arc shape, so that the stress generated by the stretchable flat cable 1 during stretching can be uniformly dispersed on the first connection end 11 and the second connection end 12, the stretchable flat cable 1 is prevented from being torn during stretching, excessive local stress or fatigue is reduced, and the stretching life is prolonged.
Preferably, the first connection end 11 and the second connection end 12 are located on the same straight line passing through the node O, so that two adjacent pixel islands 2 may be aligned along the first direction X or the second direction Y, and have symmetrical or identical structures, which is convenient for manufacturing.
Referring to fig. 3, a schematic cross-sectional view of the display panel shown in fig. 1 along the a-a direction is shown. The display panel comprises a flexible substrate a, the flexible substrate a can be made of a flexible PI material which is commonly used in the industry, the PI material has good flexibility, tolerance, expansion resistance, stress resistance and the like, can be repeatedly bent and stretched, can better bear a metal wire, and has high process integration feasibility. In addition, the flexible substrate a may also be made of a nanocomposite material, Polydimethylsiloxane (PDMS), or the like, so as to improve the bending stability of the display panel.
The flexible substrate a is formed with TFT backplates (not shown in the figure) distributed in an array, a metal wire is formed between every two adjacent TFT backplates, the metal wire includes a first metal wire c1 distributed in a spiral shape and a second metal wire c2 located at two sides of the first metal wire c1, and the first metal wire c1 is electrically connected with the second metal wire c 2. Laying an OLED device layer b on the TFT backboard; and forming an encapsulation layer d on the OLED device layer b and the metal wires, and carrying out graphical processing on the encapsulation layer d to obtain hollow pixel islands 2 and stretchable flat cables 1. Optionally, the peripheries of the hollowed-out pixel islands 2 and the stretchable flat cable 1 may be further coated with an elastic coating layer e, as shown in fig. 3.
Referring to fig. 4 and 5, the number of the first metal wires c1 laid inside the stretchable flat cable 1 is one or more, and if the arrangement space is more than enough, the two or more first metal wires c1 may be arranged side by side inside the stretchable flat cable 1, as shown in fig. 4. If the arrangement space is compact, two or more first metal wires c1 may be stacked inside the stretchable flat cable 1 with an insulating material layer f disposed between each layer of the first metal wires c1, as shown in fig. 5.
It can be understood that more than two first metal wires c1 may also be stacked, and a plurality of first metal wires c1 are arranged side by side in each layer, which is determined according to the function and the actual arrangement requirement of the display panel and will not be described again.
Since the main body 10 of the stretchable flat cable 1 is a smooth and flat spring structure as a whole, the tensile stress can be uniformly dispersed, and a certain resilience can be provided on the microstructure, when the main body 10 is driven by the first connection end 11 and the second connection end 12 to be gradually unfolded and extended from the spiral winding state, the tensile stress is not concentrated on a certain point, so that the first metal wire c1 is not broken, and the stability of the stretchable flat cable 1 is improved.
Referring to fig. 6, an embodiment of the present invention further provides a manufacturing method of a display panel, where the manufacturing method includes:
step S1: a flexible substrate a is provided. The flexible substrate a can be made of PI material as described above.
Step S2: the method comprises the steps of forming TFT back plates distributed in an array on a flexible substrate a, forming a metal lead between every two adjacent TFT back plates, laying an OLED device layer b on the TFT back plates, wherein the metal lead comprises a first metal lead c1 distributed in a spiral shape.
Step S3: and forming an encapsulation layer d on the OLED device layer b and the metal wires.
Step S4: and carrying out patterning processing on the packaging layer d to obtain a display panel with a plurality of pixel islands 2 and a stretchable flat cable 1 connected between two adjacent pixel islands 2, wherein the pixel islands 2 are formed by a flexible substrate a and the packaging layer d covering a TFT backboard and an OLED device layer b laid on the TFT backboard, the stretchable flat cable 1 is formed by a flexible substrate a and the packaging layer d covering a first metal wire c1, the stretchable flat cable 1 comprises a main body part 10 and two connecting ends extending from the main body part 10, and the main body part 10 comprises connecting wires distributed in a spiral shape.
Further, the number of the first metal conductive wires c1 is one or more than two, and the two or more first metal conductive wires c1 are arranged side by side and/or stacked inside the stretchable flat cable 1.
Optionally, the method for manufacturing a display panel provided by the embodiment of the present invention further includes:
step S5: and forming an elastic coating layer e on the display panel, and curing. The elastic coating layer e may be a transparent stretchable material, such as PDMS, and the screen body formed in step S3 may be generally immersed in liquid PDMS for wrapping, or the upper and lower sides of the screen body may be respectively covered with PDMS materials and then cured.
Step S6: the cured display panel with the elastic coating layer e is subjected to patterning treatment to form pixel islands 2 coated by the elastic coating layer e and stretchable flat cables 1 coated by the elastic coating layer e. The pixel islands 2 and the stretchable flat cable 1 are hollow patterns, and the elastic coating layer e can strengthen the resilience of the stretchable flat cable after stretching and can also connect and protect the pixel islands 2 and the stretchable flat cable 1.
In addition, the embodiment of the invention also provides a display device, which comprises the display panel. The display device may be a liquid crystal display device or an electroluminescent display device, such as a liquid crystal panel, an electronic book, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and any other product or component with a display function.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
a plurality of pixel islands (2) arranged in rows and columns along intersecting first and second directions (X, Y), each pixel island (2) comprising a plurality of sub-pixels;
the stretchable flat cable (1) comprises a main body portion (10) and two connecting ends extending out of the main body portion (10), the main body portion (10) comprises connecting lines distributed in a spiral shape, and the stretchable flat cable (1) is electrically connected with two adjacent pixel islands (2) through the two connecting ends.
2. The display panel according to claim 1, wherein the main body portion (10) of the stretchable flat cable (1) comprises a first spiral flat cable (101) and a second spiral flat cable (102) intersecting at a node (O), the first spiral flat cable (101) spirally extending from the node (O) out of the first connection end (11), the second spiral flat cable (102) spirally extending from the node (O) out of the second connection end (12).
3. The display panel according to claim 2, wherein the first spiral flat cable (101) and the second spiral flat cable (102) extend spirally from the node (O) to the first connection end (11) and the second connection end (12), respectively, and the spiral radius of the first spiral flat cable (101) and the second spiral flat cable (102) increases gradually.
4. The display panel according to claim 1, wherein the portions of the stretchable row line (1) where the first connection end (11) and the second connection end (12) are connected to the pixel island (2) are rounded.
5. The display panel according to any one of claims 2 to 4, wherein the first connection end (11) and the second connection end (12) of the stretchable cord (1) are located on the same straight line passing through the node (O).
6. The display panel according to claim 1, wherein the stretchable flat cable (1) is laid with a first metal wire (c1), the number of the first metal wires (c1) is one or more, and the two or more first metal wires (c1) are arranged side by side and/or stacked inside the stretchable flat cable (1).
7. A manufacturing method of a display panel is characterized by comprising the following steps:
providing a flexible substrate (a);
forming TFT back plates distributed in an array on the flexible substrate (a), forming a metal lead between every two adjacent TFT back plates, and laying an OLED device layer (b) on the TFT back plates, wherein the metal lead comprises a first metal lead (c1) distributed in a spiral shape;
forming an encapsulation layer (d) on the OLED device layer (b) and the metal wire;
and carrying out graphical processing on the packaging layer (d) to obtain a display panel with a plurality of pixel islands (2) and a stretchable flat cable (1) connected between two adjacent pixel islands (2), wherein the pixel islands (2) are formed by covering the TFT backboard with the flexible substrate (a) and the packaging layer (d) and an OLED device layer (b) laid on the TFT backboard, the stretchable flat cable (1) is formed by covering the first metal wire (c1) with the flexible substrate (a) and the packaging layer (d), the stretchable flat cable (1) comprises a main body part (10) and two connecting ends extending from the main body part (10), and the main body part (10) comprises connecting wires distributed in a spiral shape.
8. The method for manufacturing a stretchable cable (1) according to claim 7, wherein the number of the first metal wires (c1) is one or more than two, and two or more than two first metal wires (c1) are arranged side by side and/or stacked inside the stretchable cable (1).
9. The method of manufacturing according to claim 7, further comprising:
forming an elastic coating layer (e) on the display panel and curing;
and carrying out patterning treatment on the display panel with the elastic coating layer (e) after the curing treatment so as to form pixel islands (2) coated by the elastic coating layer (e) and stretchable flat cables (1) coated by the elastic coating layer.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811526094.0A CN111326542A (en) | 2018-12-13 | 2018-12-13 | Display panel, manufacturing method thereof and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811526094.0A CN111326542A (en) | 2018-12-13 | 2018-12-13 | Display panel, manufacturing method thereof and display device |
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| CN112054045A (en) * | 2020-08-26 | 2020-12-08 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112289193A (en) * | 2020-10-30 | 2021-01-29 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112991942A (en) * | 2021-02-09 | 2021-06-18 | 京东方科技集团股份有限公司 | Stretchable display substrate and display device |
| CN113990193A (en) * | 2021-10-29 | 2022-01-28 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display panel and flexible display screen |
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| CN114842745A (en) * | 2022-04-02 | 2022-08-02 | Tcl华星光电技术有限公司 | Display module and display device |
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Application publication date: 20200623 |
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| RJ01 | Rejection of invention patent application after publication |