阅读说明：本技术 显示面板、显示装置及显示面板的制造方法 (Display panel, display device and manufacturing method of display panel ) 是由 翟峰 顾杨 王涛 杨小龙 邢汝博 于 2019-02-27 设计创作，主要内容包括：本发明实施例提供一种显示面板、显示装置及显示面板的制造方法,显示面板包括层叠设置的第一衬底层和导线层,导线层包括：第一电极导线,多个第一电极导线均沿第一方向延伸,且相互间隔设置；第二电极导线,多个第二电极导线沿第二方向延伸并与多个第一电极导线空间重叠设置,以形成多个空间重叠部；柔性绝缘层,位于多个第一电极导线和第二电极导线之间,至少对应各空间重叠部设置；其中,第一电极导线和第二电极导线均由可拉伸银浆制成。本发明中由可拉伸银浆铺设形成的第一电极导线和第二电极导线具有良好的拉伸性能,能够提高显示面板的拉伸性能。同时柔性绝缘层具有良好的拉伸性能,能够进一步提高显示面板的拉伸性能。(The embodiment of the invention provides a display panel, a display device and a manufacturing method of the display panel, wherein the display panel comprises a first substrate layer and a lead layer which are arranged in a stacked mode, and the lead layer comprises: the first electrode leads extend along a first direction and are arranged at intervals; a plurality of second electrode leads extending in a second direction and disposed to be spatially overlapped with the plurality of first electrode leads to form a plurality of spatially overlapped portions; a flexible insulating layer disposed between the plurality of first electrode leads and the plurality of second electrode leads and at least corresponding to the respective spatial overlapping portions; wherein, the first electrode lead and the second electrode lead are both made of stretchable silver paste. The first electrode lead and the second electrode lead which are formed by laying the stretchable silver paste have good tensile property, and the tensile property of the display panel can be improved. Meanwhile, the flexible insulating layer has good tensile property, and the tensile property of the display panel can be further improved.)

1. A display panel comprising a first substrate layer and a conductor layer arranged in a stack, the conductor layer comprising:

the first electrode leads extend along a first direction and are sequentially arranged adjacently, and a gap is reserved between every two adjacent first electrode leads;

a plurality of second electrode leads extending in a second direction and disposed to be spatially overlapped with the plurality of first electrode leads to form a plurality of spatially overlapped portions;

a flexible insulating layer disposed between the plurality of first electrode leads and the plurality of second electrode leads and at least corresponding to each of the spatially overlapping portions;

wherein the first electrode lead and the second electrode lead are both made of stretchable silver paste.

2. The display panel of claim 1, further comprising a plurality of rigid protective elements, each of the rigid protective elements being disposed corresponding to each of the spatial overlaps and between the first substrate layer and the wire layer.

3. The display panel of claim 2, further comprising a second substrate layer on a side of the wire layer remote from the first substrate layer.

4. A display panel as claimed in claim 3 characterized in that the first substrate layer and/or the second substrate layer is a flexible substrate layer.

5. The display panel according to claim 1, wherein the first electrode wire extends linearly in the first direction, and/or wherein the second electrode wire extends linearly in the second direction.

6. The display panel according to claim 1, wherein the width of the first electrode wire is 20 μm to 150 μm, and/or the width of the second electrode wire is 20 μm to 150 μm;

preferably, the width of the first electrode lead is 20 to 80 μm, and/or the width of the second electrode lead is 20 to 80 μm.

7. The display panel according to claim 1, wherein the first electrode wire has a thickness of 5 to 50 μm, and/or the second electrode wire has a thickness of 5 to 50 μm;

preferably, the first electrode lead has a thickness of 10 to 40 μm, and/or the second electrode lead has a thickness of 10 to 40 μm.

8. The display panel of claim 1, wherein the stretchable silver paste comprises a mixture of silver flakes and silver wires, a flexible resin and an organic solvent, wherein the mixture of silver flakes and silver wires is 70 wt% to 90 wt%, the flexible resin is 5 wt% to 25 wt%, and the organic solvent is 5 wt% to 25 wt%.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.

10. A method of manufacturing a display panel, comprising:

paving silver paste, curing and patterning the silver paste to form a plurality of stretchable first electrode leads, wherein the first electrode leads extend along a first direction and are sequentially arranged adjacently, and a gap is reserved between every two adjacent first electrode leads;

paving an insulating material, and curing and patterning the insulating material to form a flexible insulating layer;

lay the silver thick liquid, it is right the silver thick liquid solidifies and patterning forms a plurality of tensile second electrode wire, and is a plurality of the second electrode wire extends and with a plurality of along the second direction first electrode wire space overlaps the setting, forms a plurality of space overlap portions, flexible insulating layer corresponding to space overlap portion sets up.

Technical Field

The invention relates to the technical field of display equipment, in particular to a display panel, a display device and a manufacturing method of the display panel.

Background

In the manufacturing process of the existing stretchable panel, a magnetron sputtering metal copper process is generally selected, and silicon oxide/silicon nitride is deposited by chemical vapor deposition to be used as an inorganic insulating layer. Although the copper has a certain ductility, the electrode lead prepared by the process still has defects after being stretched, and the inorganic insulating layer also has cracking phenomena, so that the mass productivity and the service life of the device are not high.

Therefore, a new display panel, a display device, a silver paste and a method for manufacturing the display panel are needed.

Disclosure of Invention

The embodiment of the invention provides a display panel, a display device and a manufacturing method of the display panel, and aims to improve the tensile property of the display panel.

In one aspect, an embodiment of the present invention provides a display panel, including a first substrate layer and a wire layer, which are stacked, where the wire layer includes: the first electrode leads extend along a first direction and are sequentially arranged adjacently, and a gap is reserved between every two adjacent first electrode leads; a plurality of second electrode leads extending in a second direction and disposed to be spatially overlapped with the plurality of first electrode leads to form a plurality of spatially overlapped portions; a flexible insulating layer disposed between the plurality of first electrode leads and the plurality of second electrode leads and at least corresponding to the respective spatial overlapping portions; wherein, the first electrode lead and the second electrode lead are both made of stretchable silver paste.

According to one aspect of the invention, the protective device further comprises a plurality of rigid protective elements, wherein each rigid protective element is arranged corresponding to each space overlapping part and is arranged between the first substrate layer and the lead layer.

According to one aspect of the invention, the device further comprises a second substrate layer located on a side of the conductor layer remote from the first substrate layer.

According to an aspect of the invention, the first substrate layer and/or the second substrate layer is a flexible substrate layer.

According to an aspect of the present invention, the first electrode lead may extend linearly in the first direction, and/or the second electrode lead may extend linearly in the second direction.

According to an aspect of the present invention, the width of the first electrode wire is 20 μm to 150 μm, and/or the width of the second electrode wire is 20 μm to 150 μm;

preferably, the width of the first electrode lead is 20 μm to 80 μm, and/or the width of the second electrode lead is 20 μm to 80 μm.

According to an aspect of the present invention, the first electrode lead has a thickness of 5 μm to 50 μm, and/or the second electrode lead has a thickness of 5 μm to 50 μm;

preferably, the first electrode lead has a thickness of 10 to 40 μm, and/or the second electrode lead has a thickness of 10 to 40 μm.

According to one aspect of the invention, the stretchable silver paste comprises a mixture of silver sheets and silver wires, a flexible resin and an organic solvent, wherein the mixture of the silver sheets and the silver wires is 70 wt% to 90 wt%, the flexible resin is 5 wt% to 25 wt%, and the organic solvent is 5 wt% to 25 wt%.

The invention further provides a display device comprising the display panel.

In another aspect, the present invention provides a method for manufacturing a display panel, including:

laying a first substrate layer;

the method comprises the steps that silver paste is laid on a first substrate layer, solidification and patterning are conducted on the silver paste to form a plurality of stretchable first electrode leads, the first electrode leads extend along a first direction and are sequentially arranged adjacently, and a gap is reserved between every two adjacent first electrode leads;

paving an insulating material, and curing and patterning the insulating material to form a flexible insulating layer;

lay the silver thick liquid, solidify the silver thick liquid and form a plurality of tensile second electrode wires with the patterning, a plurality of second electrode wires extend along the second direction and overlap the setting with a plurality of first electrode wire space, form a plurality of space overlap portion, and flexible insulating layer is corresponding to the setting of space overlap portion.

According to the invention, the display panel comprises the first substrate layer and the lead layer which are arranged in a stacked mode, the lead layer comprises the first electrode lead and the second electrode lead which are distributed in a crossed mode, and the first electrode lead and the second electrode lead are formed by laying stretchable silver paste, so that the first electrode lead and the second electrode lead have good tensile property, and the tensile property of the display panel can be improved. The space overlapping part of the first electrode lead and the second electrode lead which are overlapped with each other is provided with the flexible insulating layer, so that the first electrode lead and the second electrode lead are insulated and isolated, the flexible insulating layer has good tensile property at the same time, the tensile property of the display panel can be further improved, and the problems that the display panel fails and the like caused by the cracking of the insulating layer or the cracking of the lead layer after the display panel is stretched are avoided.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the invention;

FIG. 2 is a partial cross-sectional view of a display panel of an embodiment of the present invention;

fig. 3 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the invention.

Description of reference numerals:

100. a first substrate layer;

200. a conductor layer;

210. a first electrode lead; 220. a second electrode lead; 230. a flexible insulating layer;

300. a rigid protection unit;

400. a second substrate layer.

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.

The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

For better understanding of the present invention, the display panel, the display device and the method for manufacturing the display panel according to the embodiments of the present invention will be described in detail below with reference to fig. 1 to 3.

Fig. 1 is a display panel according to an embodiment of the present invention, and fig. 2 is a partial structural sectional view of fig. 1. In order to better show the structure of the display panel of the present invention, fig. 1 shows a schematic structural diagram of a portion of the first electrode lead 210 and a portion of the second electrode lead 220.

The display panel of the invention comprises a first substrate layer 100 and a wire layer 200 which are arranged in a stacked manner, wherein the wire layer 200 comprises: a plurality of first electrode leads 210, each of the plurality of first electrode leads 210 extending along a first direction (X direction in fig. 1), and being sequentially adjacent to each other, a gap being left between two adjacent first electrode leads 210; a plurality of second electrode leads 220 extending in a second direction (Y direction in fig. 1) and disposed to be spatially overlapped with the plurality of first electrode leads 210 to form a plurality of spatially overlapped portions; a flexible insulating layer 230 between the plurality of first electrode leads 210 and the plurality of second electrode leads 220, at least corresponding to each of the spatially overlapping portions; wherein the first electrode lead 210 and the second electrode lead 220 are made of stretchable silver paste to form stretchable first electrode leads 210 and second electrode leads 220. The spatial overlapping means that the first electrode lead 210 and the second electrode lead 220 are not in direct contact, and orthographic projections of the first electrode lead 210 and the second electrode lead 220 on the first substrate layer 100 are arranged to cross each other.

The plurality of second electrode leads 220 are sequentially adjacent to each other, and a gap is left between two adjacent second electrode leads 220, so that the plurality of first electrode leads 210 and the plurality of second electrode leads 220 are crossed with each other to form a plurality of space overlapping portions. The spatial overlapping portion refers to a portion where the first electrode lead 210 and the second electrode lead 220 overlap each other in the stacking direction (Z direction in fig. 2).

It is understood that the size of the angle formed by the intersection of the first electrode lead 210 and the second electrode lead 220 is not limited herein, i.e., the angle between the first direction and the second direction is not limited herein. Preferably, the first electrode lead 210 and the second electrode lead 220 are perpendicular to each other. The first electrode lead 210 and the second electrode lead 220 can be horizontally and vertically laid, so that the forming process of the first electrode lead 210 and the second electrode lead 220 is simplified, and the manufacturing and forming of the display panel are facilitated.

In the display panel according to the embodiment of the present invention, the display panel includes the first substrate layer 100 and the lead layer 200 which are stacked, the lead layer 200 includes the first electrode lead 210 and the second electrode lead 220 which are distributed in a crossing manner, and the first electrode lead 210 and the second electrode lead 220 are formed by laying stretchable silver paste, so that the first electrode lead 210 and the second electrode lead 220 have good stretching performance, and thus the stretching performance of the display panel can be improved. And the overlapped part of the space between the first electrode lead 210 and the second electrode lead 220 is provided with the flexible insulating layer 230, so that the first electrode lead 210 and the second electrode lead 220 are insulated and isolated, and meanwhile, the flexible insulating layer 230 has good tensile property, so that the tensile property of the display panel can be further improved, and the problems of failure of the display panel and the like caused by cracking of the insulating layer or cracking of the lead layer 200 after the display panel is stretched are avoided.

The stretchable silver paste is arranged in various ways, and in some alternative embodiments, the stretchable silver paste is formed by mixing silver sheets, silver wires, flexible resin, organic solvent and other materials. The electrode lead formed by the solidified stretchable silver paste has good stretching, the silver sheets slide and the silver wires are lapped when the electrode lead is stretched, the conductivity of the electrode lead cannot be influenced after stretching, and the electrode lead can still conduct electricity after being stretched.

Furthermore, the silver sheet is a micron-sized silver sheet, the size of the silver sheet is small, the silver sheet and other materials can be mixed sufficiently, and meanwhile, the deformation performance of the electrode lead can be improved. In addition, the silver wire is a nano-scale silver wire, which is also beneficial to fully mixing the lead and other materials and improving the deformation performance of the electrode lead.

Further preferably, in the stretchable silver paste, the weight percentage of the mixture of the silver sheets and the silver wires is 70 wt% to 90 wt%, the weight percentage of the flexible resin is 5 wt% to 25 wt%, and the weight percentage of the organic solvent is 5 wt% to 25 wt%. The stretchable silver paste formed by adopting the proportion is subjected to curing and patterning treatment, and the formed electrode lead has good conductivity and deformation performance, so that the electrode lead can deform in different directions.

Wherein, in the mixture of silver piece and silver-colored line, the weight percent content of silver piece and silver-colored line is equal basically to can guarantee simultaneously that tensile occasionally enough silver piece takes place to slide, has the mutual overlap joint between the enough silver-colored line, perhaps the silver-colored line utilizes the mutual overlap joint of silver piece.

In some optional proportioning embodiments of the stretchable silver paste, the proportioning of the stretchable silver paste is 90 wt% of the weight percentage of the silver sheets and the silver wires, 5 wt% of the weight percentage of the flexible resin, and 5 wt% of the weight percentage of the organic solvent. In the embodiment, the weight percentage content of the mixture of the silver sheets and the silver wires is higher, so that the conductivity of the stretchable silver paste can be effectively improved, the electrode lead formed by curing the stretchable silver paste can fully meet the conductivity requirement, and the stretchable silver paste is suitable for scenes with higher conductivity requirements.

In other alternative embodiments, the ratio of the stretchable silver paste is 70 wt% of the silver sheets and the silver wires, 25 wt% of the flexible resin, and 5 wt% of the organic solvent. In the embodiment, the weight percentage of the flexible resin is higher, so that the electrode lead formed by curing the stretchable silver paste has good tensile property, and is suitable for scenes with higher requirements on tensile property.

In addition, in order to ensure sufficient mixing among the silver flakes, the lead wires and the flexible resin, in alternative embodiments, the content of the organic solvent may be increased appropriately.

In order to further improve the tensile property of the display panel, the first substrate layer 100 is a flexible substrate layer, and the first substrate layer 100 may be formed by stacking one or more of a polyimide film, a polyester film, a magnesium fluoride film, a zinc sulfide film, an organic-inorganic laminated film, and the like.

In some alternative embodiments, the display panel further includes a plurality of rigid protective units 300, each rigid protective unit 300 is disposed corresponding to each spatial overlap and is disposed between the first substrate layer 100 and the wire layer 200. When the display panel is stretched, the overlapped portion of the first electrode lead 210 and the second electrode lead 220 is prevented from being stretched and deformed to cause the failure of the display panel due to the protective effect of the rigid protective unit 300.

In further alternative embodiments, the display panel further comprises a second substrate layer 400 on the side of the wire layer 200 facing away from the first substrate layer 100. In these alternative embodiments, the wire layer 200 is located between the first substrate layer 100 and the second substrate layer 400, and the wire layer 200 is protected by the first substrate layer 100 and the second substrate layer 400 from breaking during stretching of the display panel, which may cause failure of the display panel.

It will be appreciated that the relative positions of the first electrode lead 210 and the second electrode lead 220 are not limited herein, and the first electrode lead 210 may be located between the first substrate layer 100 and the second electrode lead 220, or the second electrode lead 220 may be located between the first substrate layer 100 and the first electrode lead 210, etc.

When the first electrode wire 210 is positioned between the first substrate layer 100 and the second electrode wire 220, the rigid protection unit 300 is disposed between the first electrode wire 210 and the first substrate layer 100. The second substrate layer 400 is disposed on a side of the second electrode wire 220 away from the flexible insulating layer 230, and the second substrate layer 400 is a flexible substrate layer, so as to further improve the tensile property of the display panel.

The extending shapes of the first electrode lead 210 and the second electrode lead 220 are not limited herein, and it is preferable that the first electrode lead 210 extends linearly in the first direction and the second electrode lead 220 extends linearly in the second direction.

In these alternative embodiments, the first electrode wires 210 and the second electrode wires 220 are linear, and compared with the curve shape in the prior art, the number of the first electrode wires 210 and the second electrode wires 220 arranged in a unit area can be effectively increased, so that the duty ratio is increased, and the resolution of the display panel is increased.

In other alternative embodiments, one of the first electrode lead 210 and the second electrode lead 220 is a positive electrode lead, and the other is a negative electrode lead. The lead layer 200 is arranged in a positive and negative insulation bridging mode to form an arrayed electrode structure, a plurality of electrodes can be formed on the extension path of one electrode lead, the arrangement quantity of the electrodes on a unit area is increased, meanwhile, the position of the electrodes can be conveniently designed at will, and the design flexibility is improved.

The widths and thicknesses of the first and second electrode leads 210 and 220 are not limited herein, and for example, the width of the first electrode lead 210 may be 20 μm to 150 μm, and/or the width of the second electrode lead 220 may be 20 μm to 150 μm. The width of the first electrode wire 210 refers to the width of the first electrode wire 210 in the direction perpendicular to the extending direction X, and the width of the second electrode wire 220 refers to the width of the second electrode wire 220 in the direction perpendicular to the extending direction Y. When X and Y are perpendicular to each other, the width of the first electrode wire 210 refers to its extension width in the Y direction, and the width of the second electrode wire 220 refers to its extension width in the X direction.

Preferably, the width of the first electrode lead 210 is 20 μm to 80 μm, and/or the width of the second electrode lead 220 is 20 μm to 80 μm. Because the electrode wire that forms after the silver thick liquid that can stretch solidifies has good tensile properties, the width that consequently first electrode wire 210 and second electrode wire 220 can set up is narrower, can further improve the quantity of arranging of first electrode wire 210 and second electrode wire 220 on unit area to improve the duty cycle, improve display panel's resolution ratio.

In further alternative embodiments, the thickness of the first electrode lead 210 may be 5 μm to 50 μm, and/or the thickness of the second electrode lead 220 may be 5 μm to 50 μm.

Preferably, the thickness of the first electrode lead 210 is 10 μm to 40 μm, and/or the thickness of the second electrode lead 220 is 10 μm to 40 μm. The first electrode wire 210 and/or the second electrode wire 220 have a relatively thick thickness, which ensures good conductivity and tensile properties of the second electrode wire 220 under a narrow line width.

In any of the above embodiments, it is further preferable that the width of the first electrode lead 220 and/or the second electrode lead 220 is 20 μm to 80 μm, and the thickness of the first electrode lead 220 and/or the second electrode lead 220 is 10 μm to 40 μm. That is, when the width of the first electrode lead 220 and/or the second electrode lead 220 is 20 μm to 80 μm, and the thickness of the first electrode lead 220 and/or the second electrode lead 220 is at least half of the width, the conductivity and tensile properties of the first electrode lead 220 and/or the second electrode lead 220 are better, which can prevent the poor conductivity caused by too small number of leads per unit area or too narrow leads due to too wide leads, and can also avoid the tensile properties of the leads from being affected by the insufficient thickness. It is understood that the widths and thicknesses of the first electrode wire 210 and the second electrode wire 220 may be the same or different, and in order to simplify the manufacturing method and the manufacturing process of the display panel, the widths of the first electrode wire 210 and the second electrode wire 220 are the same, and the thicknesses of the first electrode wire 210 and the second electrode wire 220 are also the same.

In the following, by taking fig. 1 and fig. 2 as an example, a method for manufacturing a display panel will be briefly described, and as shown in fig. 3, the method for manufacturing a display panel includes:

step S301: a plurality of rigid protection units 300 are laid on a substrate.

There are various ways to lay the rigid protection unit 300, and the rigid protection unit 300 can be laid by using a screen printing technique and a micro polyimide material. That is, a micro polyimide or the like material is laid on a substrate, and then the micro polyimide or the like material is cured and patterned by using a screen printing technique to form a plurality of rigid protection units 300.

Step S302: and laying silver paste, and performing curing and patterning treatment on the silver paste to form a plurality of first electrode leads 210.

The first electrode lead 210 may be formed by patterning silver paste using a screen printing technique, so that the first electrode lead 210 has good tensile properties. The plurality of first electrode wires 210 extend along a first direction and are sequentially and adjacently disposed, and a gap is left between two adjacent first electrode wires 210.

Step S303: an insulating material is laid, and the insulating material is cured and patterned to form the flexible insulating layer 230.

The insulating material may be patterned by using a screen printing technique, and preferably, the insulating material is a stretchable carbon paste, so that the flexible insulating layer 230 has good stretching property.

Step S304: and laying silver paste, and performing curing and patterning treatment on the silver paste to form a plurality of second electrode leads 220.

The silver paste may be processed to form the second electrode wire 220 by the same process as that for forming the first electrode wire 210, so as to simplify the manufacturing process of the entire display panel and improve the manufacturing efficiency of the display panel. The plurality of second electrode leads 220 extend in the second direction and are disposed to be spatially overlapped with the plurality of first electrode leads 210, forming a plurality of spatially overlapped portions, and the flexible insulating layer 230 is disposed to correspond to the spatially overlapped portions.

Step S305: a second substrate layer 400 is laid.

Finally, the rigid protective element 300 is peeled off from the substrate and the first substrate layer 100 is laid on the side of the rigid protective element 300 remote from the first electrode lead 210.

One of the first electrode lead 210 and the second electrode lead 220 is a positive electrode lead, and the other is a negative electrode lead.

A second embodiment of the present invention further provides a display device, including the display panel according to any one of the first embodiments, where the display device may be a product or a component having a display function, such as a mobile phone, a tablet, a television, a palm computer, an ipod, a digital camera, and a navigator. Since the display device according to the embodiment of the present invention includes the display panel according to any one of the first embodiments, the display device according to the present invention has the advantages of the display panel, and details thereof are not repeated herein.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.