CN108682303B - Flexible display substrate, flexible display screen and electronic terminal equipment - Google Patents
Flexible display substrate, flexible display screen and electronic terminal equipment Download PDFInfo
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- CN108682303B CN108682303B CN201810454990.4A CN201810454990A CN108682303B CN 108682303 B CN108682303 B CN 108682303B CN 201810454990 A CN201810454990 A CN 201810454990A CN 108682303 B CN108682303 B CN 108682303B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention relates to the technical field of display, in particular to a flexible display substrate which comprises a substrate body, a first substrate, a second substrate and a first electrode, wherein the first substrate comprises a first substrate body and a second substrate body; the flexible display substrate body is provided with a display area and a bending area; the metal connecting wires penetrate through the bending area to the display area and are used for being electrically connected with the pixel array arranged in the display area; and the part of at least one metal connecting wire positioned in the bending area extends along a non-linear track. According to the flexible display panel, the part, located in the bending area, of the metal connecting line is arranged to be non-linear to extend, so that the bending stress can be released by the non-linear extending part when the bending area is bent, and the metal connecting line in the bending area is effectively prevented from being broken due to repeated bending of the bending area.
Description
Technical Field
The invention relates to the technical field of display devices, in particular to a flexible display substrate, a flexible display screen and electronic terminal equipment.
Background
With the progress of science and technology and the development of society, the application field of the flexible display screen is more and more extensive, and the electronic equipment with the flexible display screen becomes the development trend of the electronic equipment in the future.
At present, a flexible display substrate in a flexible display screen is generally provided with a bending region, that is, in the manufacturing and using processes of the flexible display substrate, the flexible display substrate is bent and folded through the bending region.
However, since the bending region is subjected to multiple bending and folding operations, the metal connecting wire arranged in the bending region is broken due to the fact that the bending stress cannot be timely released, the display quality of the flexible display screen is reduced, and even the flexible display screen and the electronic device cannot be normally used.
Disclosure of Invention
Therefore, it is necessary to provide a flexible display substrate, a flexible display screen and an electronic terminal device for solving the above technical problems, which can effectively reduce the defect that a metal connection line arranged in a bending area is broken due to multiple bending of the bending area, thereby effectively improving the display performance of the display screen and the corresponding electronic device.
A flexible display substrate may include;
the flexible display substrate body is provided with a display area and a bending area;
the metal connecting wires penetrate through the bending area to the display area and are used for being electrically connected with the pixel array arranged in the display area;
and the part of at least one metal connecting wire positioned in the bending area extends along a non-linear track.
According to the flexible display panel, the part, located in the bending area, of the metal connecting line is arranged to be non-linear to extend, so that the bending stress can be released by the non-linear extending part when the bending area is bent, and the metal connecting line in the bending area is effectively prevented from being broken due to repeated bending of the bending area.
In an optional embodiment, in the bending region, a stacked structure is disposed on the flexible display substrate body; the stacked structure includes stacked multilayer thin films;
wherein the plurality of metal connecting lines extend to the display area through the stacked structure.
In an alternative embodiment, the same metal connecting line extending along a non-linear trajectory is distributed in at least two films of the stacked structure.
In an alternative embodiment, the same metal connecting line extending along a non-linear track in the bending region is distributed in a step shape in different film layers of the stacked structure.
In an alternative embodiment, the top end of the stepped portion of the metal connecting wire has a tip structure.
In an alternative embodiment, the display area comprises a shaped display area and a non-shaped display area; at least one of a notch and an arc-shaped corner is arranged in the special-shaped display area;
in the plurality of metal connecting lines extending along the non-linear track in the bending area near the special-shaped display area, at least two metal connecting lines are positioned in different film layers of the stacked structure on the section of the flexible display substrate body perpendicular to the extending direction of the metal connecting lines; and
in the bending area, any two metal connecting wires are mutually insulated.
In an alternative embodiment, the metal connection lines include at least two of scan lines, data lines, and power lines.
In the bending area, on the cross section of the flexible display substrate body perpendicular to the extending direction of the metal connecting lines, the different types of metal connecting lines are respectively distributed in the different film layers of the stacked structure.
In an alternative embodiment, in the bending region, the metal connection lines of the same kind are located in the same film structure on a cross section of the flexible display substrate body perpendicular to an extending direction of the metal connection lines.
The present application further provides a flexible display screen, which may include:
a flexible display substrate according to any one of the preceding claims;
a cover plate covering the flexible display substrate;
a touch panel covering the cover plate;
wherein the cover plate is positioned between the flexible display substrate and the touch pad.
An electronic terminal device can comprise the flexible display screen.
Drawings
FIG. 1 is a schematic diagram of a flexible display substrate according to one embodiment;
FIG. 2 is a schematic diagram of an embodiment in which different metal interconnects are distributed in different layers;
FIG. 3 is a schematic diagram of an embodiment in which different types of metal interconnects are disposed on different layers;
FIG. 4 is a schematic diagram of an embodiment of a metal connection line extending in a step shape;
FIG. 5 is a schematic view of a tip structure disposed on top of a stepped structure based on the structure shown in FIG. 4;
FIG. 6 is a schematic diagram of the structure of the back side of the display area of the flexible display screen in one embodiment;
FIG. 7 is a schematic view of a structured display area of a flexible display screen in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of a flexible display substrate in one embodiment. As shown in fig. 1, a flexible display substrate 1 includes a flexible display substrate body 10, and the flexible display substrate body 10 has a display area 11, a bending area 12 and a peripheral device area 13, a pixel array 16 for light emitting display is disposed in the display area 11, a plurality of metal connection lines 121 are disposed in the bending area 12, and a peripheral driving circuit 131 is disposed in the peripheral device area 13; the peripheral driving circuit 131 is electrically connected to the pixel array 16 through the metal connecting wires 121, respectively, so as to drive the pixel array 16 to perform light emitting display. The metal connection lines 121 penetrate through the bending region 12, and in the bending region 12, at least one of the metal connection lines 121 located in the bending region 12 extends along a non-linear (e.g., a curve, a bending line, etc.) track, so that when the bending region 12 is bent, the non-linear track extending portion of the metal connection line 121 can release the bending stress, thereby preventing the metal connection line 121 from being broken due to bending of the bending region 12.
Fig. 2 is a schematic structural diagram of different metal connection lines distributed in different film layers in one embodiment. As shown in fig. 1-2, in the bending region 12 of the flexible display substrate 1, a stacked structure 2 formed by stacking a plurality of thin films may be disposed on the flexible display substrate body 10, the metal connection lines 121 respectively extend to the display region 11 and the peripheral device region 13 after penetrating through the stacked structure 2, and any one of the metal connection lines 121 may extend in a non-linear direction through the same film layer in the stacked structure 2; when there are a plurality of metal connecting lines 121, on the cross section along the extending direction of the metal connecting lines, the metal connecting lines 121 of different numbers may also be distributed in different film structures, so as to extend along a non-linear line in the extending direction of the film layer in the vertical stacked structure 2; as shown in fig. 2, the metal connection lines 121a, 121b and 121c are distributed in different layers to avoid the occurrence of the rupture of the layers and the metal connection lines due to the concentration of bending stress caused by the over-dense distribution of the metal connection lines in the same layer.
Fig. 3 is a schematic diagram illustrating a structure in which different types of metal connection lines are distributed on different layers according to an embodiment, and the structure shown in fig. 2 may be a cross-sectional structure of the structure shown in fig. 3 along a direction perpendicular to an extending direction of the metal connection lines. As shown in fig. 1 to 3, the metal connection lines 121 may include a plurality of metal lines, such as a first metal connection line 121a, a second metal connection line 121b, and a third metal connection line 121c, for example, the first metal connection line 121a may be a scan line (scan line), the second metal connection line 121b may be a data line (data line), and the third metal connection line 121c may be a power line; that is, when the metal connection line 121 includes two or more types of connection lines, the different types of metal connection lines may be respectively distributed in different film structures, so as to avoid the stress of the same film from being concentrated when the bending region 12 is bent, thereby ensuring that the film structure and the metal connection line disposed therein are not affected by the bending stress.
Furthermore, when metal connecting line has good stress release performance of buckling, in order to facilitate the preparation of metal connecting line, still can all set up in same membranous layer structure in the district that buckles same kind of metal connecting line, be located between the different root metal connecting line in adjacent membranous layer structure, along perpendicular to metal connecting line extending direction, carry out crisscross distribution to effectively disperse and release buckling stress.
Fig. 4 is a schematic structural diagram of a metal connection line extending in a step shape according to an embodiment. As shown in fig. 3 to 4, in order to further reduce the influence of the bending stress of the bending region, for the same metal connection line 121, the portions thereof located in the bending region may be distributed in different film structures, for example, the portions are distributed in different films in a step-like structure as shown in fig. 3, so as to release the bending stress applied to the same metal connection line 121 when the bending region is bent in a plurality of film structures, thereby effectively reducing the risk of the metal connection line breaking due to bending of the bending region.
Fig. 5 is a schematic view of a structure based on the structure of fig. 4 with a tip disposed on top of a stepped structure. As shown in fig. 4 to 5, in order to further timely release the bending stress applied to the metal connection line 121 when the metal connection line is bent in the bending region, a tip structure 1211 may be disposed at the top end of the step structure shown in fig. 3, so as to further timely and effectively release the stress applied to the metal connection line when the metal connection line is bent in the bending region. As shown in fig. 5, for the same metal connection line 121, when the metal connection line in the bending region is set to extend in a non-linear manner, the metal connection line in the other region (i.e. the region other than the bending region) may be set to extend along a linear or non-linear track according to actual requirements. Aiming at the display screen in the prior full-screen or narrow-frame electronic equipment, as the front equipment such as a front camera, a receiver, a start key (such as a Home key) and the like needs to be arranged, corresponding holes or notches need to be formed on the display screen, but in the traditional display technology, the same driving circuit is still adopted to drive each display part of the special-shaped display screen, and then the problem of uneven display between the display part near the holes or the notches and other display parts is caused.
FIG. 6 is a schematic diagram of the structure of the back side of the display area of the flexible display screen in one embodiment. As shown in fig. 1 to 6, in an alternative embodiment, a first driving circuit 17, a second driving circuit 18, and other components may be further disposed on the back of the display area of the flexible display substrate body 10, the display area 11 has a special-shaped display area 111 and a non-special-shaped display area 112, and the special-shaped display area 111 has a slot 15 for mounting front components such as a front camera, an earphone, and a start key; the first driving circuit 17 is used for driving the special-shaped display area 111 to display separately, and the second driving circuit 18 is used for driving the non-special-shaped display area 112 to display separately, so that the special-shaped display area 111 and the non-special-shaped display area 112 can be driven sufficiently, and the uniformity of display between the special-shaped display area 111 and the non-special-shaped display area 112 can be effectively improved; that is, through the separately additional driving circuit, each portion of the display area 10 with the notches and the holes can have similar or same driving capability, so as to effectively improve the display uniformity between each portion of the whole flexible display substrate 1.
It should be noted that the display area 11 in the embodiment of the present application has a front side from which light exits and a back side opposite to the front side, that is, the display area 11 shown in fig. 6 is of a back side structure, and the display area 11 shown in fig. 1 is of a front side structure.
In an alternative embodiment, as shown in fig. 6, the flexible display substrate 1 may further include a control circuit 19, and the control circuit 19 may be electrically connected to the first driving circuit 17 and the second driving circuit 18, respectively, for adjusting the driving capability between the display regions in the display region 11 more precisely, and further improving the display uniformity between the irregular display region 111 and the non-irregular display region 112 in the display region 11.
In another embodiment, as shown in fig. 6, the flexible display substrate 1 may further include a bending portion 151, and after the bending portion 151 is bent toward the back surface of the display area 11, the above-mentioned notch 15 is formed in the special-shaped display area 111; the first driving circuit 17 can be fixed on the surface exposed by the bending portion 151 after being bent and fixed, and the second driving circuit 18 can be fixed on the back surface of the display area 11, so that the added first driving circuit 17 does not occupy the use area on the back of the display area 11. Meanwhile, the additional control circuit 19 may be disposed on the bending portion 151, and if the size of the bending portion 151 allows, the second driving circuit 18 and other corresponding components may be integrated on the bending portion 151, so as to save the use space on the back of the display region 11.
Further, as shown in fig. 6, a connection side (not shown) is a side where the bending portion 151 is connected to the display region 11 of the flexible display substrate body 10, and in order to ensure that the added first driving circuit 17 has better driving capability, the first driving circuit 17 may be disposed adjacent to the connection side to reduce a circuit connection path between the first driving circuit 17 and the opposite type display region 111. Accordingly, when the control circuit 19 and the second driving circuit 18 are disposed on the bending portion 151, they can be disposed adjacent to the connecting side; similarly, when the control circuit 19 and the second driving circuit 18 are disposed at the back of the display area 11, the control circuit 19 can be disposed at the center between the first driving circuit 17 and the second driving circuit 18, and the second driving circuit 18 is disposed near the driving port of the non-shaped display area 112, so as to reduce the driving capability degradation caused by the overlong wires to the maximum extent.
It should be noted that, in the above embodiment, the bending region 12 is located between the display region 11 and the peripheral device region 13 for example, and in other embodiments, the bending region 12 is also located in the display region 11, that is, as long as the portion of the flexible display substrate 1 that can be bent can be defined as the bending region, and as long as the bending region is provided with a connection line for conducting signals or electrical energy, based on actual requirements, for part or all of the connection lines, the portion of the connection lines that are located in the defined bending region can be set to extend along a non-straight line, and any one or more of the above fig. 2 to 5 can be used to form distribution of the metal connection lines, so as to effectively release stress generated by bending of the bending region, and reduce the risk of breaking the connection lines.
Referring to fig. 1, in an actual application process, in some full-screen or frameless products, because a larger display area is required, a corner of the display screen generally needs to be set to be an arc-shaped corner 14 matched with a frame, or an open slot 15 used for installing a front component such as a front camera, a receiver or a start key is formed in the display screen, that is, the display area 11 of the flexible display substrate body 10 may include a special-shaped display area 111 and a non-special-shaped display area 112, and some special-shaped structures such as the arc-shaped corner 14 and the open slot 15 are arranged in the special-shaped display area 111. The special-shaped structures are all cut and prepared on the complete display screen, so that the routing (namely metal connecting lines) in the areas adjacent to the special-shaped structures on the display screen are dense, and the bending operation can be carried out at any position of the flexible display substrate 1, namely the bending area in the embodiment can be any area needing to be bent on the flexible display substrate, particularly the area adjacent to the special-shaped structures, because the routing is dense relative to other areas, the routing is carried out by adopting the distribution mode of the metal connecting lines in any embodiment, and the problem that the metal lines in the area adjacent to the open slot of the flexible full-screen or the flexible frameless screen are broken due to bending can be effectively solved.
Fig. 7 is a schematic structural diagram of a flexible display screen in one embodiment. As shown in fig. 1 to 6, in an alternative embodiment, a flexible display screen 3 may include the flexible display substrate 1 described in any of the above embodiments, the flexible display substrate 31 may include a flexible display substrate body 10 on which a display area 11, a bending area 12, and other areas may be disposed, and a metal connection line 121 extends through the bending area 12 to the display area 11 to be electrically connected to a pixel array 16 in the display area 11; the portion of the metal connection line 121 located in the bending region 12 extends along a curved, bent or stepped track, so as to release the bending stress when the bending region is bent, thereby effectively avoiding the metal connection line from being broken. Meanwhile, the flexible display 3 may further include a cover 32 covering the front surface of the flexible display substrate 31, and a touch screen 33 located on a light-emitting surface of the cover 32.
Another embodiment of the present application further provides an electronic terminal device, which may include the flexible display screen in any of the above embodiments as a display device, where the flexible display screen may have a bending region and a display region, and the metal connection lines for connecting the pixel arrays in the display region extend in a non-linear manner in a portion located in the bending region, for example, extend along a curved, bent, or stepped track, so as to effectively avoid the metal connection lines from being broken due to bending of the bending region, and further improve the display stability of the electronic terminal device.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A flexible display substrate, comprising:
the flexible display substrate body is provided with a display area and a bending area;
the metal connecting wires penetrate through the bending area to the display area and are used for being electrically connected with the pixel array arranged in the display area;
wherein, the part of at least one metal connecting wire in the bending area extends along a non-linear track, and is arranged in the bending area; the flexible display substrate body is provided with a stacking structure; the stacked structure comprises a plurality of stacked thin films, and the plurality of metal connecting lines extend to the display area through the stacked structure; in the bending area, the same metal connecting line extending along the non-linear track is distributed in different film layers of the stacked structure in a step shape, and the top end of the step-shaped part of the metal connecting line is provided with a tip structure.
2. The flexible display substrate of claim 1, wherein the same metal connecting line extending along a non-linear track is distributed in at least two films of the stacked structure.
3. The flexible display substrate of claim 1, wherein the display area comprises a shaped display area and a non-shaped display area; at least one of a notch and an arc-shaped corner is arranged in the special-shaped display area;
in the plurality of metal connecting lines extending along the non-linear track in the bending area near the special-shaped display area, at least two metal connecting lines are positioned in different film layers of the stacked structure on the section of the flexible display substrate body perpendicular to the extending direction of the metal connecting lines; and
in the bending area, any two metal connecting wires are mutually insulated.
4. The flexible display substrate of claim 3, wherein the metal connection lines comprise at least two of scan lines, data lines, and power lines,
in the bending area, on the cross section of the flexible display substrate body perpendicular to the extending direction of the metal connecting lines, the different types of metal connecting lines are respectively distributed in the different film layers of the stacked structure.
5. The flexible display substrate according to claim 4, wherein in the bending region, the metal connection lines of the same kind are located in the same film structure on a cross section of the flexible display substrate body perpendicular to an extending direction of the metal connection lines.
6. A flexible display screen, comprising:
a flexible display substrate according to any one of claims 1 to 5;
a cover plate covering the flexible display substrate;
a touch panel covering the cover plate;
wherein the cover plate is positioned between the flexible display substrate and the touch pad.
7. An electronic terminal device, characterized in that it comprises a flexible display screen according to claim 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810454990.4A CN108682303B (en) | 2018-05-14 | 2018-05-14 | Flexible display substrate, flexible display screen and electronic terminal equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810454990.4A CN108682303B (en) | 2018-05-14 | 2018-05-14 | Flexible display substrate, flexible display screen and electronic terminal equipment |
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| CN108682303A CN108682303A (en) | 2018-10-19 |
| CN108682303B true CN108682303B (en) | 2020-05-19 |
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| CN109388290B (en) * | 2018-11-06 | 2021-10-01 | 上海天马有机发光显示技术有限公司 | Flexible display device, touch position determining method and electronic equipment |
| CN109346487B (en) * | 2018-11-28 | 2021-04-20 | 广州国显科技有限公司 | Display panel, display device and manufacturing method of display panel |
| CN109377883B (en) * | 2018-11-30 | 2021-06-29 | 广州国显科技有限公司 | Display panel and display device |
| CN110379937B (en) * | 2019-07-25 | 2021-12-14 | 云谷（固安）科技有限公司 | Flexible display panel, manufacturing method thereof and flexible display device |
| CN111625120A (en) * | 2020-05-07 | 2020-09-04 | 武汉华星光电技术有限公司 | Display panel |
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| JP2002299549A (en) * | 2001-03-29 | 2002-10-11 | Matsushita Electric Ind Co Ltd | Laminated semiconductor device and manufacturing method therefor |
| CN106796999A (en) * | 2014-09-29 | 2017-05-31 | 乐金显示有限公司 | The flexible display apparatus of the distribution reduced with bending stress |
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| CN106206613B (en) * | 2016-08-24 | 2020-12-29 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display substrate and preparation method thereof |
| CN108022942B (en) * | 2016-10-31 | 2020-06-30 | 上海和辉光电有限公司 | Array substrate and organic light-emitting display panel |
| KR102648414B1 (en) * | 2016-10-31 | 2024-03-18 | 엘지디스플레이 주식회사 | In-cell touch foldable display device |
| CN107342310B (en) * | 2017-08-23 | 2020-03-13 | 京东方科技集团股份有限公司 | Flexible display device and manufacturing method thereof |
| CN207116427U (en) * | 2017-08-23 | 2018-03-16 | 京东方科技集团股份有限公司 | A kind of flexible display panels and display device |
| CN107561806B (en) * | 2017-09-29 | 2020-07-03 | 厦门天马微电子有限公司 | Array substrate and display panel |
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| JP2002299549A (en) * | 2001-03-29 | 2002-10-11 | Matsushita Electric Ind Co Ltd | Laminated semiconductor device and manufacturing method therefor |
| CN106796999A (en) * | 2014-09-29 | 2017-05-31 | 乐金显示有限公司 | The flexible display apparatus of the distribution reduced with bending stress |
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