CN114361039A - Preparation method of spliced display panel, spliced display panel and panel unit - Google Patents
Preparation method of spliced display panel, spliced display panel and panel unit Download PDFInfo
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- CN114361039A CN114361039A CN202011091618.5A CN202011091618A CN114361039A CN 114361039 A CN114361039 A CN 114361039A CN 202011091618 A CN202011091618 A CN 202011091618A CN 114361039 A CN114361039 A CN 114361039A
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Abstract
A preparation method of a spliced display panel, the spliced display panel and a panel unit are provided, wherein the preparation method of the spliced display panel comprises the following steps: providing a support plate and a plurality of panel units, wherein a driving circuit is formed on each panel unit; aligning and splicing a plurality of panel units on the supporting plate; connecting lines are manufactured between the corresponding driving lines on the two panel units, and the driving lines on the single panel unit form complete driving lines on the whole display panel through the arrangement of the connecting lines; a cover plate is provided on the upper surface of the plurality of panel units. The preparation method of the spliced display panel can obviously reduce the width of a gap between two spliced screens, can complete the splicing of the display panel through a splicing process, and has the advantages of simple and convenient preparation method and higher reliability.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a preparation method of a spliced display panel, the spliced display panel and a panel unit.
Background
For technical and cost reasons, the size of a single high-resolution display screen is not too large at present, however, in daily life, a large-size display screen is required, and in the prior art, a plurality of display screens are usually spliced in a manufacturing process to form an oversized spliced screen so as to meet the requirement of the large display screen.
However, in the prior art, all displays are typically controlled by a simple physical splice and then by an additional control system. At this moment, the gap of the splicing part between the display screen and the display screen is wide, and the visual experience is poor.
Disclosure of Invention
In view of the above, the invention provides a method for manufacturing a tiled display panel, a tiled display panel and a panel unit, the method for manufacturing the tiled display panel can significantly reduce the width of a gap between two tiled screens, and the tiled display panel can be completed by a single-time tiling process, and the method for manufacturing the tiled display panel is simple and convenient and has high reliability.
The invention provides a preparation method of a spliced display panel, which comprises the following steps:
providing a support plate and a plurality of panel units, wherein a driving circuit is formed on each panel unit;
aligning and splicing a plurality of panel units on the supporting plate;
manufacturing connecting lines between corresponding driving circuits on the two panel units;
a cover plate is provided on the upper surface of the plurality of panel units.
When the panel units are aligned and spliced on the support plate, an adhesive layer is arranged between the end faces of two adjacent panel units.
Further, when the connecting wire is manufactured, the method further comprises the following steps:
manufacturing a photoresist layer on the panel unit;
removing the photoresist layer between the corresponding driving circuits on the two panel units to form a photoresist removing area;
forming a connecting line in the photoresist removing area;
and removing the photoresist layer.
Further, after forming the connection line, the method further includes forming a protective layer on the connection line.
The method further comprises the step of arranging a circuit board on the edge of the display panel, wherein a driver for driving the driving circuit is formed on the circuit board, and the circuit board is electrically connected with the driving circuit on the panel unit positioned on the edge of the display panel.
The invention also provides a spliced display panel which comprises a plurality of panel units spliced with each other, wherein each panel unit is provided with a driving circuit, and corresponding driving circuits on two adjacent panel units are connected through a connecting wire.
Furthermore, the panel unit comprises a substrate, the driving circuit is arranged on the substrate, a light-emitting unit electrically connected with the driving circuit is further formed on the substrate, and a protective layer covers the light-emitting unit, the driving circuit and one side of the connecting wire, which is far away from the substrate.
Further, an adhesive layer is provided between end faces of two adjacent panel units.
Furthermore, a circuit board is arranged at the edge of the display panel, a driver for driving the driving circuit is formed on the circuit board, and the circuit board is electrically connected with the driving circuit on the panel unit at the edge of the display panel.
The invention also provides a panel unit, which comprises a substrate, a driving circuit arranged on the substrate and a light-emitting unit connected with the driving circuit, wherein protective layers are covered on the driving circuit and the light-emitting unit, the end part of the driving circuit is exposed out of the protective layers to form connecting terminals, and the connecting terminals are arranged on the edge of the panel unit at intervals in a tiled mode.
In summary, in this embodiment, the large-sized display panel can be obtained by splicing the plurality of panel units and forming the connecting lines between the spliced panel units only through one-time splicing process. Because the connecting lines are connected between the driving circuits of the two panel units, and the cover plates and other structures are arranged after the connecting lines are finished, the width of a gap between the two spliced screens can be obviously reduced, the manufacturing method is simple and convenient, and the reliability is high.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic flow chart of a manufacturing method of a tiled display panel according to an embodiment of the present invention.
Fig. 2 to fig. 6 are schematic diagrams illustrating steps in a method for manufacturing a tiled display panel according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a mask.
Fig. 8 is a schematic top view of a tiled display panel.
Fig. 9 is a schematic structural view of a joint between two adjacent panel units in fig. 8.
Fig. 10 is a schematic top view of the panel unit.
Fig. 11 is a schematic cross-sectional view of the panel unit.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.
In view of this, the invention provides a method for manufacturing a tiled display panel, a tiled display panel and a panel unit.
Fig. 1 is a schematic flow diagram illustrating a method for manufacturing a tiled display panel according to an embodiment of the present invention, fig. 2 to 6 are schematic diagrams illustrating steps in the method for manufacturing a tiled display panel according to an embodiment of the present invention, and fig. 7 is a schematic structural diagram illustrating a mask plate. As shown in fig. 1 to 7, a method for manufacturing a tiled display panel provided in an embodiment of the present invention includes the following steps:
s1: a support plate 10 and a plurality of panel units 20 are provided, and a driving line 21 is formed on each panel unit 20.
In step S1, the driving circuit 21 may include a plurality of scan lines 211 and data lines 212 (see fig. 10), each panel unit 20 may have a plurality of scan lines 211 and data lines 212 formed thereon, and the scan lines 211 and the data lines 212 are disposed alternately to form a plurality of pixel units 213.
The panel unit 20 further has a light emitting unit 22, such as a micro led or an OLED, formed thereon, and a protective layer 23 covering the driving line 21 and the light emitting unit 22, wherein the protective layer 23 may include, but is not limited to, a passivation layer, a planarization layer, and/or a buffer layer. The end of the driving line 21 is exposed outside the protective layer 23 to form a connection terminal 214, and the connection terminal 214 is disposed on the edge of the panel unit 20 at an interval in a tiled manner.
S2: the plurality of panel units 20 are aligned and joined to each other on the support plate 10.
In the present embodiment, the plurality of panel units 20 are aligned and spliced on the support plate 10, the panel units 20 may be fixed on the support plate 10, and the fixing method may be permanent fixing or non-permanent fixing when the panel units 20 and the support plate 10 are fixed. When the display panel is permanently fixed, the panel unit 20 can be fixed on the support plate 10 by using a thermosetting adhesive, and after the display panel is spliced, the support plate 10 is not removed any more, so that a supporting force is provided for the display panel; when it is in a non-permanent manner, a thermoplastic polymer may be used as a binder for temporary adhesion, and after the display panel is spliced, the support plate 10 may be removed to reduce the thickness of the display panel (fig. 6 shows the case when the support plate 10 is removed).
Further, in this embodiment, an adhesive layer 24 may be disposed between the end portions of two adjacent panel units 20, and the arrangement of the adhesive layer 24 may ensure the connection between the two adjacent panel units 20 to be stable, and may also prevent a gap from being generated between the end surfaces of the two adjacent panel units 20, which may affect the connection line 25 in the subsequent process.
S3: the connection lines 25 are formed between the corresponding drive lines 21 on the two panel units 20.
In this embodiment, through the alignment splicing in step S2, the corresponding driving lines 21 on the two panel units 20 can be aligned, and the connecting lines 25 are made between the corresponding driving lines 21 on the two panel units 20 to complete the connection between the two panel units, so that the driving circuits on a single panel unit 20 form complete driving lines on the whole display panel through the connecting lines. In the manufacturing process, a photoresist may be coated on the aligned panel units 20 in step S2. When coating the photoresist, the photoresist can be coated by a slit coating method, the photoresist can be a positive photoresist or a negative photoresist, and after the photoresist is coated, the photoresist is dried to form the photoresist layer 26.
After the photoresist layer 26 is formed, exposure processing is performed through a mask 27 (see fig. 7) to form a photoresist remaining region 261 and a photoresist removing region 262.
A light-transmitting portion 271 and a light-shielding portion 272 are formed on the mask 27, the light-transmitting portion 271 is aligned with a region between the corresponding driving lines 21 on the two panel units 20, and then exposure processing is performed, an exposure source may be a high-pressure mercury lamp, a DUV (Deep Ultraviolet), an EUV (Extreme Ultraviolet), or the like, and an optical exposure process includes, but is not limited to, a contact exposure method, a proximity exposure method, and a projection exposure method.
The photoresist removing region 262 is a region between the corresponding driving lines 21 on the two panel units 20, and the photoresist remaining region 261 may be a region other than a region between the corresponding driving lines 21 on the two panel units 20.
A developing process is performed after the exposure process to remove the photoresist in the photoresist removal region 262.
In the preparation of the connecting line 25, the connecting line 25 may be prepared in the photoresist removing region 262 by a vapor deposition method, a sputtering method, an ink jet printing method, or the like. The material of the connecting wire 25 may be a simple metal or a metal alloy. In the present embodiment, it is preferable that the connection line 25 has a length of 0.1 to 1000 μm and a thickness of 0.01 to 100 μm.
After the connecting lines 25 are prepared, the photoresist layer 26 is removed.
The connecting lines 25 are manufactured by the photoetching process, so that the connection of the driving circuits 21 in all the panel units 20 in the display panel can be realized in the same manufacturing process, the manufacturing efficiency is high, and meanwhile, the connecting lines 25 manufactured by the method have high connection reliability.
S4: a cover plate 30 is provided on the upper surface of the plurality of panel units 20 to complete the splicing of the plurality of panel units 20.
Further, after the step of S3, in order to ensure the sealing performance at the connection line 25, the protection layer 23 may also be formed at the connection line 25, so that the protection layer 23 on the whole display panel forms a plane.
Further, a circuit board 28, preferably a flexible circuit board 28, may be disposed at the edge of the display panel, a driver of the driving circuit 21 is formed on the circuit board 28, and the circuit board 28 is electrically connected to the driving circuit 21 on the panel unit 20 located at the edge of the display panel. By additionally providing the circuit board 28, the structures of the panel units 20 in the display panel (including the panel unit 20 located at the edge of the display panel and the panel unit 20 located at the middle of the display panel) can be completely the same, and the difficulty in splicing the panel units 20 is reduced.
In the present embodiment, a large-sized display panel can be obtained by a single-step splicing process by splicing a plurality of panel units 20 and forming connecting lines 25 between the spliced panel units 20. Because the connecting lines 25 are connected between the driving lines 21 of the two panel units 20, and the cover plates 30 and other structures are arranged after the connecting lines 25 are completed, the width of a gap between the two spliced screens can be obviously reduced, the splicing of the display panels can be completed through one-time splicing process, the manufacturing method is simple and convenient, and the reliability is high.
Fig. 9 is a schematic structural view of a joint between two adjacent panel units in fig. 8, fig. 10 is a schematic structural view of a top view of the panel units, and fig. 11 is a schematic structural view of a cross section of the panel units. As shown in fig. 9 to 11, the present invention further provides a tiled display panel, which includes a plurality of panel units 20 tiled with each other, wherein each panel unit 20 is provided with a driving circuit 21, and corresponding driving circuits 21 of two adjacent panel units 20 are connected by a connecting line 25.
Furthermore, each panel unit 20 includes a substrate 29, the driving circuit 21 is disposed on the substrate 29, the light emitting unit 22 electrically connected to the driving circuit 21 is further formed on the substrate 29, and a protection layer 23 covers a side of the light emitting unit 22, the driving circuit 21, and the connecting wire 25 away from the substrate 29.
An adhesive layer 24 is provided between the end surfaces of two adjacent panel units 20 to ensure the stability of the connection between the two adjacent panel units 20, and at the same time, to prevent the gap between the end surfaces of the two adjacent panel units 20 from affecting the connection line 25.
Further, a circuit board 28, preferably a flexible circuit board 28, is disposed at the edge of the display panel, a driver of the driving lines 21 is formed on the circuit board 28, and the circuit board 28 is electrically connected to the driving lines 21 on the panel unit 20 located at the edge of the display panel.
The invention also provides a panel unit 20, the panel unit 20 comprises a substrate 29, a driving circuit 21 arranged on the substrate 29 and a light-emitting unit 22 connected with the driving circuit 21, a protective layer 23 is covered on the driving circuit 21 and the light-emitting unit 22, the end part of the driving circuit 21 is exposed out of the protective layer 23 to form a connecting terminal 214, and the connecting terminal 214 is arranged on the edge of the panel unit 20 at intervals in a tiled mode.
The driving circuit 21 includes a plurality of scan lines 211 and data lines 212 (see fig. 10), each panel unit 20 may have a plurality of scan lines 211 and data lines 212, and the scan lines 211 and the data lines 212 are disposed alternately to form a plurality of pixel units 213. After the connection by the connection lines 25, the complete scan lines 211 and data lines 212 are formed on the entire display panel in the same extending direction as the panel unit 20.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation method of a spliced display panel is characterized by comprising the following steps: the method comprises the following steps:
providing a support plate and a plurality of panel units, wherein a driving circuit is formed on each panel unit;
aligning and splicing a plurality of panel units on the supporting plate;
manufacturing connecting lines between corresponding driving circuits on the two panel units;
a cover plate is provided on the upper surface of the plurality of panel units.
2. The method of manufacturing a tiled display panel according to claim 1, wherein: when the panel units are aligned and spliced on the supporting plate, the method further comprises the step of arranging an adhesive layer between the end faces of two adjacent panel units.
3. The method of manufacturing a tiled display panel according to claim 1, wherein: when the connecting wire is manufactured, the method further comprises the following steps:
manufacturing a photoresist layer on the panel unit;
removing the photoresist layer between the corresponding driving circuits on the two panel units to form a photoresist removing area;
forming a connecting line in the photoresist removing area;
and removing the photoresist layer.
4. The method of manufacturing a tiled display panel according to claim 1, wherein: after forming the connection line, the method further includes forming a protective layer on the connection line.
5. The method of manufacturing a tiled display panel according to claim 1, wherein: the method further comprises the step of arranging a circuit board on the edge of the display panel, wherein a driver for driving the driving circuit is formed on the circuit board, and the circuit board is electrically connected with the driving circuit on the panel unit positioned on the edge of the display panel.
6. A tiled display panel, comprising: the panel unit comprises a plurality of panel units which are spliced with each other, each panel unit is provided with a driving line, and the two adjacent panel units are connected with each other through a connecting line.
7. The tiled display panel of claim 6, wherein: the panel unit comprises a substrate, the driving circuit is arranged on the substrate, a light-emitting unit electrically connected with the driving circuit is further formed on the substrate, and a protective layer covers the light-emitting unit, the driving circuit and one side, far away from the substrate, of the connecting wire.
8. The tiled display panel of claim 6, wherein: an adhesive layer is provided between the end faces of two adjacent panel units.
9. The tiled display panel of claim 6, wherein: the edge of the display panel is provided with a circuit board, a driver for driving the driving circuit is formed on the circuit board, and the circuit board is electrically connected with the driving circuit on the panel unit positioned at the edge of the display panel.
10. A panel unit characterized by: including the base plate, set up drive circuit on the base plate, and with the luminescence unit that drive circuit links to each other drive circuit reach the luminescence unit coats and is stamped the protective layer, drive circuit's tip expose in outside the protective layer to form connecting terminal, connecting terminal with the mode interval of tiling set up in on the edge of panel unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091618.5A CN114361039A (en) | 2020-10-13 | 2020-10-13 | Preparation method of spliced display panel, spliced display panel and panel unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091618.5A CN114361039A (en) | 2020-10-13 | 2020-10-13 | Preparation method of spliced display panel, spliced display panel and panel unit |
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|---|---|
| CN114361039A true CN114361039A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011091618.5A Pending CN114361039A (en) | 2020-10-13 | 2020-10-13 | Preparation method of spliced display panel, spliced display panel and panel unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114973983A (en) * | 2022-05-31 | 2022-08-30 | 武汉华星光电半导体显示技术有限公司 | Spliced display panel |
| WO2024020720A1 (en) * | 2022-07-25 | 2024-02-01 | 厦门市芯颖显示科技有限公司 | Tiled display panel and display device |
-
2020
- 2020-10-13 CN CN202011091618.5A patent/CN114361039A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114973983A (en) * | 2022-05-31 | 2022-08-30 | 武汉华星光电半导体显示技术有限公司 | Spliced display panel |
| CN114973983B (en) * | 2022-05-31 | 2024-04-30 | 武汉华星光电半导体显示技术有限公司 | Spliced display panel |
| WO2024020720A1 (en) * | 2022-07-25 | 2024-02-01 | 厦门市芯颖显示科技有限公司 | Tiled display panel and display device |
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