CN109872631B - Stretchable display module, manufacturing method thereof and display device - Google Patents
Stretchable display module, manufacturing method thereof and display device Download PDFInfo
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Abstract
The invention discloses a stretchable display module, a manufacturing method thereof and display equipment, wherein the stretchable display module comprises: a substrate having thereon a plurality of islands distributed in an array and spaced apart from each other, and a plurality of bridges connecting the plurality of islands; the first stretchable layer is arranged on the bridges, and a plurality of partition grooves are formed in the first stretchable layer on at least one bridge; and the water-blocking layer is arranged on the substrate, and the water-blocking layers are separated by the partition grooves, so that the water-blocking layer on the bridge is broken or thinned at the partition grooves, the constraint of the water-blocking layer on the bridge and the first stretchable layer on the bridge is reduced, the bridge is not easy to break during stretching, and the stretchable amount of the bridge and the first stretchable layer on the bridge is increased.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a stretchable display module, a method for manufacturing the stretchable display module, and a display device.
Background
The stretchable device structures include hard open mesh structures, island bridge structures, hard thin film buckling structures, and the like. Among them, the island bridge structure is widely favored due to unique tensile properties. The 'island' structure in the island bridge structure is a rigid area and comprises display units (namely light-emitting units) with small stretching amount; the "bridge" structure is an elastic region surrounding the rigid region, including the connecting lines. When stretching, the stretching amount of the bridge structure is larger than that of the island structure, so that the display unit of the island structure is not easily damaged. In the island-bridge structure of the film package, because the water-resistant layer (i.e. inorganic layer) covers the bridge structure and the island structure on the whole surface, and the water-resistant layer (made of SiNx, SiON and the like) is a brittle substance with the stretching amount less than 1%, the water-resistant layer restrains the stretching amount of the bridge, and the bridge structure is a stress concentration area during stretching, the water-resistant layer on the bridge structure is easy to break, and the bridge structure together with the water-resistant layer can be broken (i.e. a connecting line is broken), so that the product is damaged.
Disclosure of Invention
In order to solve at least one of the above technical problems, a stretchable display module capable of increasing the stretchable amount of a bridge and solving a problem that a bridge structure is easily broken when stretched is provided.
The invention also provides a manufacturing method of the stretchable display module and display equipment.
The embodiment of the invention provides a stretchable display module, which comprises: a substrate having thereon a plurality of islands distributed in an array and spaced apart from each other, and a plurality of bridges connecting the plurality of islands; the first stretchable layer is arranged on the bridges, and a plurality of partition grooves are formed in the first stretchable layer on at least one bridge; and the water resistance layer is arranged on the substrate, and the water resistance layer is separated by the partition grooves.
Optionally, a plurality of the partition grooves are regularly arranged, n partition grooves are uniformly distributed in the circumferential direction of any partition groove, and n is 3-8.
Optionally, the longitudinal section of the partition groove is circular or elliptical with an upper opening, and the central angle of the opening is 60-120 degrees.
Optionally, the longitudinal section of the partition groove is in a trapezoid shape with an opening at the upper part, and the bottom angle of the trapezoid is 20-60 degrees.
Optionally, the cross section of each partition groove is in a regular polygon shape, and the side surfaces of two adjacent partition grooves are arranged oppositely.
Optionally, the side length of each partition groove is A, the distance between every two adjacent partition grooves is L, L is not more than A/2, and the height of each partition groove is 3-4 μm.
Optionally, a plurality of the partition grooves are arranged on the first stretchable layer on any one of the bridges, a second stretchable layer is further arranged on the lower side of the bridge, and the first stretchable layer and the second stretchable layer cover the bridge.
Optionally, the water-blocking layer is a deposited inorganic layer, and the thickness of the inorganic layer is not greater than the depth of the partition groove.
The display device provided by the embodiment of the invention comprises the stretchable display module in any one of the embodiments.
The manufacturing method of the stretchable display module provided by the embodiment of the invention comprises the following steps:
forming a plurality of partition grooves on the first stretchable layer on the at least one bridge of the substrate;
and forming a water-resistant layer on the substrate, wherein the water-resistant layer is separated by a plurality of partition grooves.
Optionally, a plurality of partition grooves are formed in the first stretchable layer on any one of the bridges, the water-blocking layer is deposited on the substrate, and the thickness of the deposited water-blocking layer is not greater than the depth of the partition grooves, so that the partition grooves partition the water-blocking layer.
Compared with the prior art, the stretchable display module provided by the embodiment of the invention has the advantages that the plurality of partition grooves are arranged on the bridge, and partition the water-blocking layer, so that the water-blocking layer on the bridge is broken and is in a broken state (or the water-blocking layer is thinned at the partition grooves), the constraint of the water-blocking layer on the bridge and the first stretchable layer on the bridge is reduced, the bridge is not easy to break during stretching, and the stretching amount of the bridge and the first stretchable layer on the bridge is increased.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments herein and are incorporated in and constitute a part of this specification, illustrate embodiments herein and are not to be construed as limiting the embodiments herein.
Fig. 1 is a schematic front view of a stretchable display module according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional top view of one embodiment of the first stretchable layer of FIG. 1;
FIG. 3 is a schematic cross-sectional top view of another embodiment of the first stretchable layer of FIG. 1;
FIG. 4 is a schematic top view of yet another embodiment of the first stretchable layer of FIG. 1;
FIG. 5 is a schematic cross-sectional view of one embodiment of a bridge of FIG. 1;
FIG. 6 is a schematic cross-sectional view of another embodiment of a bridge of FIG. 1;
fig. 7 and 8 are flow chart diagrams illustrating a process of manufacturing the stretchable display module according to the embodiment of the invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:
100 islands, 200 bridges, 300 first stretchable layer, 310 partition grooves, 400 water barrier layer, 500 second stretchable layer.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, however, the present disclosure may be practiced otherwise than as specifically described herein, and thus the scope of the present disclosure is not limited by the specific embodiments disclosed below.
As shown in fig. 1 to 6, the stretchable display module according to an embodiment of the present invention includes: a substrate having thereon a plurality of islands 100 (corresponding to display areas of the display module) distributed in an array and spaced apart from each other, and a plurality of bridges 200 (corresponding to non-display areas of the display module) connecting the plurality of islands 100; the plurality of first stretchable layers 300 are correspondingly arranged on the plurality of bridges 200 one by one, and a plurality of partition grooves 310 are arranged on the first stretchable layer 300 on at least one bridge 200, and the plurality of partition grooves 310 are fully distributed on the first stretchable layer 310, and can be arranged in a matrix form or in a staggered manner; and a water blocking layer 400 disposed on the substrate, and the plurality of partition grooves 310 partition the water blocking layer 400 (i.e., the water blocking layer 400 has a concavo-convex structure on the first stretchable layer 300). A plurality of light emitting cells are disposed on the plurality of islands 100 in a one-to-one correspondence, and the plurality of islands 100 are connected to the plurality of bridges 200. The plurality of first stretchable layers 300 are positioned on the same layer.
In the stretchable display module, the bridge 200 is provided with a plurality of isolation grooves 310, the isolation grooves 310 are alternately arranged to isolate the water-blocking layer 400, so that the water-blocking layer 400 on the bridge 200 is broken and is in a broken state, thus the restriction of the water-blocking layer 400 on the bridge 200 and the first stretchable layer 300 on the bridge 200 is reduced, the bridge 200 is not broken during stretching, and the stretchable amount of the bridge 200 and the first stretchable layer 300 on the bridge 200 is increased. Alternatively, the bridge 200 may be provided with a plurality of partition grooves 310, and the plurality of partition grooves 310 are alternately arranged to partition the water blocking layer 400, so that the water blocking layer 400 on the bridge 200 is thinned at the partition grooves 310, and thus the binding of the water blocking layer 400 to the bridge 200 and the first stretchable layer 300 on the bridge 200 is reduced, the bridge 200 is not easily broken during stretching, and the stretchable amount of the bridge 200 and the first stretchable layer 300 on the bridge 200 is increased.
Specifically, as shown in fig. 2 to 4, the plurality of partition grooves 310 are regularly arranged and fully distributed on the first stretchable layer 300, so as to break the water blocking layer 400 on the first stretchable layer 300 to a greater extent, n partition grooves 310 are uniformly distributed on any partition groove 310 in the circumferential direction, where n may be 3 to 8. The regular arrangement can be a matrix arrangement, a delta arrangement or a m arrangement, and the like, and the purpose of the present application can be achieved, and the purpose of the present application does not depart from the design concept of the present invention, and the present application shall not be repeated herein, and shall all fall within the protection scope of the present application.
As shown in fig. 6, the longitudinal section of the partition groove 310 may be circular or elliptical with an opening at the top, and the central angle of the opening is 60 to 120 degrees, when the water blocking layer 400 is manufactured, the water blocking layer 400 is broken at the partition groove 310, the inner side surface of the partition groove 310 is a concave curved surface, when the water blocking layer 400 is manufactured by a deposition method, the water blocking layer 400 in the partition groove 310 is more difficult to be connected with the inner side surface of the partition groove 310, and when the water blocking layer 400 is stretched, the water blocking layer can be deformed by the side wall of the partition groove 310, so that the product stretching performance can be improved.
Or, as shown in fig. 5, the longitudinal section of the partition groove 310 may be in a trapezoid shape with an opening at the upper part, and the bottom angle of the trapezoid is 20 to 60 degrees, so that when the water blocking layer 400 is manufactured in a deposition manner, the water blocking layer 400 in the partition groove 310 is more difficult to be connected with the inner side surface of the partition groove 310, and can deform through the side wall of the partition groove 310 during stretching, thereby improving the stretching performance of the product.
Furthermore, as shown in fig. 2 to 4, the cross section of each partition groove 310 is regular polygonal (or circular) such as regular triangular, square or regular hexagonal, and when the cross section is regular hexagonal, the side surfaces of two adjacent partition grooves 310 may be opposite (although the side surfaces of two adjacent partition grooves 310 are staggered, the purpose of the present application is also achieved, and will not be described herein, and the present application shall also belong to the protection scope of the present application), so that the bridge 200 and the first stretchable layer 300 are stressed in the same direction when stretched, and the bridge 200 is less prone to breaking and damage. The bridge 200 may be a gate line, a data line, or the like, and may be made of a metal having a better tensile property, such as titanium, aluminum, silver, gold, or the like, or may be made of a stretchable conductor, such as conductive rubber, graphene, or the like.
As shown in fig. 2, the partition grooves 310 are square, four partition grooves 310 are uniformly distributed in the circumferential direction of one partition groove 310, the partition groove 310 in the middle is arranged opposite to the side edges of the four partition grooves 310 in the circumferential direction, and the smaller the interval between adjacent partition grooves 310, the better the interval is, which can be determined according to simulation design.
As shown in fig. 3, the partition grooves 310 are regular triangle-shaped, four partition grooves 310 are uniformly distributed in the circumferential direction of one partition groove 310, and the smaller the interval between adjacent partition grooves 310, the better the interval, which can be determined according to simulation design.
As shown in fig. 4, the partition grooves 310 are regular hexagonal, six partition grooves 310 are uniformly distributed in the circumferential direction of one partition groove 310, and the smaller the interval between adjacent partition grooves 310, the better the interval, which can be determined according to simulation design.
Further, the side length of the partition grooves 310 is a, the distance between two adjacent partition grooves 310 is L, L is not more than a/2, and the water blocking layer 400 on the first stretchable layer 300 is largely partitioned, so that the water blocking layer 400 on the first stretchable layer 300 is more broken, the height of the partition grooves 310 may be 3-4 μm, and the thickness of the water blocking layer 400 may be 1-2 μm.
Specifically, a plurality of partition grooves 310 are disposed on the first stretchable layer 300 of any one of the bridges 200, as shown in fig. 5 and 6, a second stretchable layer 500 is further disposed on the lower side of the bridge 200, the first stretchable layer 300 and the second stretchable layer 500 cover the bridge 200, and both the first stretchable layer 300 and the second stretchable layer 500 may be organic layers, for example, the material is a photosensitive adhesive, and the specific material may be a negative photoresist. The area of the upper surface of the first stretchable layer 300, which is the area of the partition groove, may be equal to the area of the area outside the partition groove.
Specifically, the water blocking layer 400 is a deposited inorganic layer having a thickness not greater than the depth of the partition groove 310, such that the inorganic layer inside the partition groove 310 and the inorganic layer outside the partition groove 310 are disconnected from each other and are not connected together after deposition.
The display device (not shown in the figures) provided by the embodiment of the invention comprises the stretchable display module described in any one of the above embodiments. The display device may be an electronic product such as a mobile phone.
The display device provided by the embodiment of the invention has all the advantages of the stretchable display module described in any one of the above embodiments, and is not described herein again.
The method for manufacturing a stretchable display module (not shown in the figures) provided by the embodiment of the invention comprises the following steps:
forming a plurality of partition grooves 310 on the first stretchable layer 300 on the at least one bridge 200 of the substrate, the plurality of partition grooves 310 being distributed over the first stretchable layer 300 (shown in fig. 7);
a water blocking layer 400 is formed on the substrate, and a plurality of partition grooves 310 partition the water blocking layer 400 (see fig. 4).
In the manufacturing method of the stretchable display module, the bridge 200 is provided with the plurality of isolation grooves 310, and the plurality of isolation grooves 310 isolate the water-resistant layer 400, so that the water-resistant layer 400 on the bridge 200 is broken and is in a broken state, thus the restriction of the water-resistant layer 400 on the bridge 200 and the first stretchable layer 300 on the bridge 200 is reduced, the bridge 200 is not broken during stretching, and the stretchable amount of the bridge 200 and the first stretchable layer 300 on the bridge 200 is increased. Alternatively, the bridge 200 may be provided with a plurality of partition grooves 310, and the plurality of partition grooves 310 are alternately arranged to partition the water blocking layer 400, so that the water blocking layer 400 on the bridge 200 is thinned at the partition grooves 310, and thus the binding of the water blocking layer 400 to the bridge 200 and the first stretchable layer 300 on the bridge 200 is reduced, the bridge 200 is not easily broken during stretching, and the stretchable amount of the bridge 200 and the first stretchable layer 300 on the bridge 200 is increased.
The plurality of isolation grooves 310 may be formed through a patterning process, which includes processes of coating photoresist, mask exposure, developing, etching, stripping photoresist, etc., and is a well-established manufacturing process. For example, coating a photoresist, exposing the photoresist by grinding, so that the photoresist on the first stretchable layer 300 is exposed to a pattern of a plurality of isolation grooves 310, and the other regions are unexposed regions, etching the isolation grooves 310 on the first stretchable layer 300 by an etching process after developing, and finally stripping the photoresist on the unexposed regions. The water barrier may be made by deposition. The deposition may be performed by a known process such as sputtering, evaporation, chemical vapor deposition, etc., the coating may be performed by a known coating process, and the etching may be performed by a known method, which is not particularly limited herein. The water-blocking layer can be formed by deposition, the deposition can be performed by known processes such as sputtering, evaporation, chemical vapor deposition, etc., the coating can be performed by known coating processes, and the etching can be performed by known methods, which are not specifically limited herein.
Specifically, a plurality of partition grooves 310 are formed on the first stretchable layer 300 of any one of the bridges 200, the water blocking layer 400 is deposited on the substrate, and the thickness of the deposited water blocking layer 400 is not greater than the depth of the partition grooves 310, so that when the water blocking layer 400 is deposited, the partition grooves 310 partition the water blocking layer 400, and thus the water blocking layer 400 deposited in the partition grooves 310 and the water blocking layer 400 deposited outside the partition grooves 310 are mutually disconnected, and the water blocking layer 400 on any one of the first inorganic layers is in a fractured state, so that the stretchable performance is better.
That is, the greater the number of the partition grooves 310, the greater the degree of breakage of the water blocking layer 400 on the first stretchable layer 300, and the better the stretching property of the product.
Wherein, the water-blocking layer 400 is an inorganic layer, the thickness of the inorganic layer is set to be 1-2 μm, and the depth of the partition groove 310 is set to be 3-4 μm.
Preferably, the lower side of the bridge 200 is also previously formed with a second stretchable layer 500 (shown in fig. 5 to 8). The second stretchable layer 500 may be fabricated through a patterning process.
In summary, in the stretchable display module according to the embodiment of the invention, the bridge is provided with the plurality of partition grooves, and the plurality of partition grooves partition the water-blocking layer, so that the water-blocking layer on the bridge is broken or thinned at the partition grooves, and thus the constraint of the water-blocking layer on the bridge and the first stretchable layer on the bridge is reduced, the bridge is not easily broken during stretching, and the stretchable amount of the bridge and the first stretchable layer on the bridge is increased.
In the description herein, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.
In the description of the specification, reference to the term "one embodiment," "some embodiments," "a specific embodiment," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example herein. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments disclosed herein are described above, the descriptions are only for the convenience of understanding the embodiments and are not intended to limit the disclosure. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure herein may be limited only by the appended claims.
Claims (10)
1. A stretchable display module, comprising:
a substrate having thereon a plurality of islands distributed in an array and spaced apart from each other, and a plurality of bridges connecting the plurality of islands;
the first stretchable layer is arranged on the bridges, and a plurality of partition grooves are formed in the first stretchable layer on at least one bridge; and
and the water resistance layer is arranged on the substrate, the water resistance layer is separated by the partition grooves, the thickness of the water resistance layer is smaller than the depth of the partition grooves, and the water resistance layer in the partition grooves is not connected with the inner side surfaces of the partition grooves.
2. The stretchable display module according to claim 1, wherein the plurality of partition grooves are regularly arranged, n partition grooves are uniformly distributed in the circumferential direction of any partition groove, and n is 3-8.
3. The stretchable display module of claim 2,
the longitudinal section of the partition groove is in a circular or elliptical shape with an opening at the upper part, and the central angle of the opening is 60-120 degrees; or
The vertical section of the partition groove is in a trapezoid shape with an opening at the upper part, and the bottom angle of the trapezoid is 20-60 degrees.
4. The stretchable display module according to claim 2, wherein the cross-section of each partition groove is in a regular polygonal shape, and the side surfaces of two adjacent partition grooves are opposite to each other.
5. The stretchable display module of claim 4, wherein the length of the partition grooves is A, the distance between two adjacent partition grooves is L, L is less than or equal to A/2, and the height of the partition grooves is 3-4 μm.
6. A stretchable display module according to any one of claims 1 to 5, wherein a plurality of the partition grooves are disposed on a first stretchable layer on any one of the bridges, a second stretchable layer is further disposed on the lower side of the bridge, and the first stretchable layer and the second stretchable layer cover the bridge.
7. The stretchable display module of any of claims 1-5, wherein the water-resistant layer is a deposited inorganic layer.
8. A display device comprising a stretchable display module according to any one of claims 1 to 7.
9. A method for manufacturing a stretchable display module is characterized by comprising the following steps:
forming a plurality of partition grooves on the first stretchable layer on the at least one bridge of the substrate;
and forming a water resistance layer on the substrate, wherein the water resistance layer is separated by the partition grooves, the thickness of the water resistance layer is smaller than the depth of the partition grooves, and the water resistance layer in the partition grooves is not connected with the inner side surfaces of the partition grooves.
10. The method of claim 9, wherein the stretchable display module is a single-layer stretchable display module,
a plurality of partition grooves are formed on the first stretchable layer on any one of the bridges.
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| CN113950712B (en) * | 2020-05-09 | 2023-09-29 | 京东方科技集团股份有限公司 | Display substrate, display panel, display device and manufacturing method of display panel |
| CN113539099A (en) * | 2021-07-19 | 2021-10-22 | 京东方科技集团股份有限公司 | Display substrate and display device |
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