CN107516472B - Flexible display device - Google Patents
Flexible display device Download PDFInfo
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- CN107516472B CN107516472B CN201710775898.3A CN201710775898A CN107516472B CN 107516472 B CN107516472 B CN 107516472B CN 201710775898 A CN201710775898 A CN 201710775898A CN 107516472 B CN107516472 B CN 107516472B
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- display device
- module
- flexible display
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- display substrate
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
Abstract
An embodiment of the present invention provides a flexible display device, including: a display substrate; and multiple sections of module materials arranged in, above or below the display substrate at the same layer and connected with each other in a contact manner; and the respective contact surfaces of the two adjacent sections of the module materials in contact connection are parallel to the bending axis of the flexible display device. When the flexible display device is bent, the adjacent two sections of module materials in contact connection can be separated, and a gap can be generated between the two contact surfaces. Therefore, stress concentration of the module material can be reduced, bending stress between two adjacent sections of module materials is released, the stress center layer of the whole module moves to the module material layer needing to be protected, risks of module material fracture and flexible display device layering are reduced, overall bending resistance of the flexible display device is improved, and reliability of the flexible display device is improved.
Description
Technical Field
The invention relates to the technical field of flexible display devices, in particular to a flexible display device.
Background
The flexible display device is a flexible display device, and the display modes thereof include various types such as organic electroluminescence (OLED), electrophoretic display (EPD), and Liquid Crystal Display (LCD). The flexible display device that the flexible of flexible can the deformation is curvable can bring the use experience of subversion for the user. However, when the flexible display device is bent and deformed, the module material inside the flexible display device may be broken due to stress concentration, and the display device may be delaminated due to uneven stress, thereby causing display failure of the flexible display device.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a flexible display device, which solves the problem of display failure caused by stress concentration of an internal module material when an existing flexible display device is bent and deformed.
An embodiment of the present invention provides a flexible display device, including:
a display substrate; and
the multi-section module materials are arranged in the same layer in, above or below the display substrate and are in contact connection with each other;
and the respective contact surfaces of the two adjacent sections of the module materials in contact connection are parallel to the bending axis of the flexible display device.
And the contact surfaces among the multiple sections of module materials are arranged in a preset bending area of the flexible display device.
The multi-section module material forms a conductive routing layer inside the display substrate.
The contact surfaces of two adjacent sections of the module materials in contact connection respectively comprise at least one convex part and at least one concave part;
wherein the at least one protruding portion of one of the die set materials in two adjacent die set materials fills the at least one recessed portion of the other die set material.
Wherein the at least one protrusion is rectangular in shape.
The multi-section module material forms an insulating layer inside, above or below the display substrate.
Wherein the insulating layer over the display substrate comprises one of: the touch screen comprises a polarizer layer, an optical adhesive layer, a touch sensing layer and a cover plate layer;
the insulating layer below the display substrate comprises one of the following layers: a support film and a shielding layer.
Wherein the flexible display device further comprises:
further comprising:
the optical refraction layer is formed on the surfaces of the multiple sections of module materials and comprises a first refraction area and a second refraction area, and the second refraction area covers the contact positions of the multiple sections of module materials;
the refractive index of the second refraction area is configured to adjust the refractive index of the display light transmitted from the contact position between the multiple sections of module materials to be the same as the refractive index of the display light transmitted from the first refraction area.
Wherein, the optical refraction layer is an optical adhesive layer.
The display substrate is an OLED display substrate.
According to the flexible display device provided by the embodiment of the invention, when the flexible display device is bent, the adjacent two sections of module materials in contact connection can be separated, and a gap can be generated between two contact surfaces. Therefore, stress concentration of the module material can be reduced, bending stress between two adjacent sections of module materials is released, the stress center layer of the whole module moves to the module material layer needing to be protected, the risk of breakage of the module material and the risk of layering of the flexible display device are reduced, the overall bending resistance of the flexible display device is improved, and the reliability of the flexible display device is improved.
Drawings
Fig. 1a to 1d are schematic structural diagrams of a flexible display device according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram illustrating a flexible display device according to an embodiment of the present invention when the flexible display device is bent.
Fig. 3 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
Fig. 6 is a schematic diagram illustrating a module material of a flexible display device according to an embodiment of the invention.
Fig. 7 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention, the display substrate being bent in one direction.
Fig. 8 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention, the display substrate being bent in another direction.
Fig. 9 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
Fig. 10 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
Fig. 11 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1a to 1d are respectively schematic structural diagrams of a flexible display device according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention when the flexible display device is bent.
As shown in fig. 1a, the flexible display device provided by the embodiment of the present invention includes: a display substrate 2 and a plurality of sections of module materials 1 which are arranged on the same layer above the display substrate 2 and are in contact connection with each other. Wherein, the respective contact surfaces of the two adjacent sections of module materials 1 which are in contact connection are parallel to the bending axis 3 of the flexible display device. The contact connection means that the plurality of pieces of the module material 1 are in close contact with each other, but are not integrally formed. The display substrate 2 refers to a substrate having a display function, and may be, for example, an OLED substrate or a TFT substrate, and the specific display mode of the display substrate 2 is not limited in the present invention.
Referring to fig. 2, when the flexible display device is bent, two adjacent segments of the module material 1 connected in contact with each other are separated, and a gap 4 is formed between two contact surfaces 11 a. Can reduce the stress concentration of module material 1 like this for the bending stress between two sections adjacent module material 1 obtains releasing, and the stress centre layer of whole module moves to the module material layer that needs the protection, has reduced the risk of module material fracture and flexible display device layering, has increased flexible display device's whole bending resistance, has improved flexible display device's reliability.
Although only two segments of the module material 1 are shown in the embodiment shown in fig. 1a, the number of the segments of the module material 1 may be adjusted according to the requirement of the flexible display device manufacturing process, and the number of the module material 1 is not particularly limited in the embodiment of the present invention.
Furthermore, although fig. 1a shows only one bending axis 3, it should be understood that the display device provided by the embodiment of the present invention may include a plurality of bending axes. In an embodiment, the plurality of bending axes 3 may be arranged in parallel or criss-cross with each other, and the flexible display device may also include a plurality of segments of the module material 1 divided by the plurality of bending axes 3. The embodiment of the present invention does not limit the specific arrangement and number of the bending shafts 3 that may be included in the flexible display device, and does not limit the specific shape of each segment of the module material 1.
Although the contact surface 11a is shown in fig. 1a as a planar structure perpendicular to the surface of the molding material 1, it should be understood that the contact surface of the multi-segmented molding material 1 may have a stepped contact surface 11b as shown in fig. 1b, an inclined contact surface 11c as shown in fig. 1c which is not perpendicular to the surface of the molding material 1, and a wavy contact surface 11d as shown. The shape of the contact surface 11a is not particularly limited in the embodiment of the present invention.
Referring to fig. 2, in an embodiment, the flexible display device may have a predetermined bending region 5, and in order to improve the bending resistance in the predetermined bending region 5, the contact surfaces 11a of two adjacent segments of the module material 1 may be disposed in the predetermined bending region 5. Thus, when the preset bending region 5 is bent, the two contact surfaces 11a in the preset bending region 5 can be separated, so that the display effect of the preset bending region is not affected by bending. It should be understood that the preset bending region can be adjusted by a designer according to actual requirements, for example, one side of the flexible display device can be set as the preset bending region, and the present invention does not limit the position and size of the preset bending region.
It should be further understood that the flexible display device may not have the predetermined bending region 5, in which case the flexible display device may include a plurality of bending axes 3 distributed in parallel, or a plurality of bending axes 3 staggered in a crisscross manner, however, as mentioned above, the specific arrangement and number of the bending axes 3 that the flexible display device may include are not limited in the embodiments of the present invention.
It should also be understood that although the multi-segment module material 1 forms a layer on the display substrate 2 in the embodiment shown in fig. 1a, the multi-segment module material structure connected with each other may be used for a layer inside or below the display substrate 2, and the embodiment of the present invention is not limited to which layer inside, above or below the display substrate 2 the multi-segment module material 1 forms.
Fig. 3 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention.
As shown in fig. 3, the flexible display device provided by the embodiment of the invention may include a display substrate 2, and a polarizer layer 103, an optical adhesive layer 104, a touch sensing layer 105, and a cover plate layer 106 sequentially disposed on the display substrate 2. In order to improve the performance of the flexible display device, the flexible display device provided by the embodiment of the invention may further include a supporting film layer 102 located below the display substrate 2 for supporting, and a shielding layer 101 located below the supporting film layer 102.
In one embodiment, the multi-segment module material 1 may also be configured as an insulating layer, such as a polarizer layer 103, an optical adhesive layer 104, a touch sensing layer 105 or a cover plate layer 106, on the display substrate 2. In another embodiment, the plurality of segments of the molding material 1 may also be configured as an insulating layer under the display substrate 2, such as the supporting film 102 or the shielding layer 101. It should be understood, however, that the segments of the module material 1 may also constitute functional layers inside the display substrate 2.
In the following embodiments shown in fig. 4 to 11, the present invention is described by taking a plurality of segments of module materials as an example of forming an insulating layer or a conductive routing layer inside the display substrate 2.
Fig. 4 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention. As shown in fig. 4, the display substrate 2 includes a bottom plate 21 and a plurality of pieces of module material 22 disposed on the same layer above the bottom plate and connected to each other in contact. Wherein the respective contact surfaces of the two adjacent segments of the module material 22 in contact connection are parallel to the bending axis 3 of the flexible display device. The plurality of segments of the molding material 22 may form an insulating layer or a conductive trace layer of the display substrate 2. When the display substrate 2 itself is bent and deformed, the adjacent module materials 22 may be respectively shifted in a direction away from the bending axis 3, thereby preventing the display substrate 2 from failing due to stress concentration during bending.
Fig. 5 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the present invention, fig. 6 is a schematic structural diagram of a module material of the flexible display device according to an embodiment of the present invention, fig. 7 is a schematic structural diagram of the display substrate of the flexible display device according to an embodiment of the present invention when the display substrate is bent in one direction, and fig. 8 is a schematic structural diagram of the display substrate of the flexible display device according to an embodiment of the present invention when the display substrate is bent in another direction. In the embodiment shown in fig. 5-8, the plurality of segments of the molding material 22 may be a conductive trace layer of the display substrate 2.
Referring to fig. 5 and 6, the contact surface of each module material 22a in contact with the adjacent module material 22a may include a first protrusion 221a, a first recess 222a, a second protrusion 223a, and a second recess 224 a. In two adjacent mold materials 22a, the first protrusion 221a of one mold material 22a can fill the second recess 224a of the other adjacent mold material 22 a. Accordingly, the second protrusion 223a of another adjacent section of the mold material 22a can fill the first recess 222a of the section of the mold material 22 a. Therefore, when the display substrate 2 is not bent or deformed, the contact surfaces of the adjacent module materials 22a are bonded to each other.
Referring to fig. 7, when the display substrate 2 is bent in one direction, the first protrusion 221a of one adjacent segment of the module material 22a and the second protrusion 224a of the other segment of the module material 22a close to the bottom plate 21a are attached to each other, and the first protrusion 222a of the segment of the module material 22a and the second protrusion 223a of the other segment of the module material 22a far from the bottom plate 21a are separated to form the gap 4 a.
Referring to fig. 8, when the display substrate 2 is bent in another direction, the first concave portion 222a of one section of the module material 22a and the second convex portion 223a of the other section of the module material 22a adjacent to the side away from the bottom plate 21a are attached to each other, and the first convex portion 221a of the one section of the module material 22a and the second concave portion 224a of the other section of the module material 22a adjacent to the side close to the bottom plate 21a are separated from each other to form a gap 4 b.
Therefore, whether the display substrate 2 is bent from one direction or the other opposite direction, it can be ensured that the contact surfaces of the two adjacent segments of the module material 22a are in contact with each other (the first protrusion 221a is in contact with the second recess 224a or the first recess 222a is in contact with the second protrusion 223 a). Therefore, when the plurality of sections of module materials 22a form a conductive routing layer of the display substrate 2a, and the display substrate 2a is bent and deformed, the stress concentration of the module materials 22a can be reduced by the two sections of module materials 2 which are in contact connection with each other through the gap 4a or 4b, so that the stress between the two adjacent sections of module materials 22a is released, the overall bending resistance of the flexible display device is improved, and the risk of fracture failure of the flexible display device is reduced; meanwhile, because two adjacent sections of the module materials 22a always have parts of contact surfaces which are mutually contacted, the normal conduction of the conductive routing layer can also be ensured. However, as shown above, the multi-stage module material 22a may also form an insulating layer of the display substrate 2a, and the embodiment of the invention is not limited to the multi-stage module material 22a forming the insulating layer or the conductive wiring layer of the display substrate 2.
Fig. 9 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
As shown in fig. 9, the contact surface of each molding material 22b with the adjacent molding material 22b may include a plurality of protrusions 221b and a plurality of recesses 222b arranged in a staggered manner.
The shape of the protrusion 22b and the depression 222b may be rectangular for ease of processing. However, it should be understood that the protruding portion 22b and the recessed portion 222b may also be trapezoidal or have other shapes, and the shapes of the protruding portion 22b and the recessed portion 222b are not particularly limited in the embodiments of the present invention.
Fig. 10 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
As shown in fig. 10, the display substrate 2c according to the embodiment of the invention may further include an optical refraction layer 5 formed on the surface of the multi-segment molding material 22 c. The optical refraction layer 5 may include a first refraction region 51 and a second refraction region 52, and the second refraction region 52 covers a contact position between two adjacent segments of the module material 22 c. The second refraction region 52 is configured to adjust the refractive index of the display light transmitted through the contact position between two adjacent segments of the module material 22c to be the same as the display light transmitted through the first refraction region 51.
By providing the above-described optical refractive layer 5, the refractive index of display light can be made uniform throughout the flexible display device. In addition, the optical refraction layer 5 can also play a certain role in protecting the multi-segment module material 22 c. In an embodiment of the invention, the optical refraction layer 5 may be an optical adhesive layer convenient for coating, or may be made of other materials, and the material of the optical refraction layer 5 is not particularly limited in the invention.
Fig. 11 is a schematic structural diagram of a display substrate of a flexible display device according to an embodiment of the invention.
As shown in fig. 11, the display substrate 2 according to the embodiment of the present invention may include: a bottom plate 201, a source electrode 208, a drain electrode 211, a gate electrode 201, an anode electrode 206, and a buffer layer 202, an active layer 209, a first insulating layer 203 and a second insulating layer 204, a planarization layer 205, and a pixel defining layer 207, which are sequentially disposed on the substrate 201. The gate 14 is prepared on the first insulating layer 203 and covered by the second insulating layer 204. The first insulating layer 203 and the second insulating layer 204 may include two openings penetrating to the active layer 209. The drain electrode 211 and the source electrode 208 are respectively prepared in the two openings, and form ohmic contact with the active layer 209. The anode electrode 206 is disposed on the drain electrode 211, and connected to the pixel defining layer 207 through the planarization layer 205. Any one of the conductive wiring layers of the source electrode 208, the drain electrode 211, the gate electrode 201, the anode electrode 206 and the active layer 209 mentioned in the embodiments of the present invention may adopt the multi-segment module material structure in the embodiments of the present invention, which are in contact connection with each other. Any one of the buffer layer 202, the active layer 209, the first insulating layer 203, the second insulating layer 204, the planarization layer 205 and the pixel defining layer 207 may also adopt the multi-segment module material structure in the embodiment of the present invention, which are connected in contact with each other. The embodiment of the present invention does not specifically limit which layer of the display substrate 2 is formed by the plurality of sections of module materials.
It should be understood that the terms such as first and second, etc. used in the embodiments of the present invention are only used for clearly describing the technical solutions of the embodiments of the present invention, and are not used to limit the protection scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A flexible display device, comprising:
a display substrate; and
the display substrate comprises a display substrate and a plurality of sections of module materials which are arranged in the display substrate and are in close contact connection with each other, wherein the plurality of sections of module materials form a conductive routing layer in the display substrate;
the contact surfaces of two adjacent sections of the module materials in contact connection are parallel to a bending axis of the flexible display device, the contact surfaces of two adjacent sections of the module materials in contact connection comprise at least one convex part and at least one concave part, and the at least one convex part of one module material in two adjacent sections of the module materials is respectively filled in the at least one concave part of the other module material;
when the display substrate is not bent or deformed, the contact surfaces of the adjacent module materials are mutually attached to form a gap-free structure, and when the display substrate is bent or deformed, the adjacent module materials are separated, so that a gap is formed between the two contact surfaces.
2. The flexible display device of claim 1, wherein the contact surface between the plurality of segments of module material is disposed in a predetermined bending region of the flexible display device.
3. The flexible display device of claim 1, wherein the at least one protrusion is rectangular in shape.
4. The flexible display device according to claim 1, further comprising:
the optical refraction layer is formed on the surfaces of the multiple sections of module materials and comprises a first refraction area and a second refraction area, and the second refraction area covers the contact positions of the multiple sections of module materials;
wherein the refractive index of the second refractive region is configured to: and adjusting the refractive index of the display light transmitted by the contact positions among the multiple sections of module materials to be the same as the display light transmitted by the first refraction area.
5. The flexible display device of claim 4, wherein the optically refractive layer is an optically adhesive glue layer.
6. The flexible display device of claim 1, wherein the display substrate is an OLED display substrate.
7. A flexible display device, comprising:
a display substrate; and
the multi-section module material is arranged in the same layer in the display substrate, above or below the display substrate and is in close contact connection with each other, and the multi-section module material forms an insulating layer in the display substrate, above or below the display substrate;
when the plurality of sections of module materials form an insulating layer above the display substrate, the insulating layer comprises one of the following layers: the touch screen comprises a polarizer layer, an optical adhesive layer, a touch sensing layer and a cover plate layer;
when the plurality of sections of module materials form an insulating layer below the display substrate, the insulating layer comprises one of the following layers: a support film and a shielding layer;
the contact surfaces of two adjacent sections of the module materials in contact connection are parallel to the bending axis of the flexible display device;
when the display substrate is not bent or deformed, the contact surfaces of the adjacent module materials are mutually attached to form a gap-free structure, and when the display substrate is bent or deformed, the adjacent module materials are separated, so that a gap is formed between the two contact surfaces.
8. The flexible display device of claim 7, wherein the contact surface between the plurality of segments of module material is disposed in a predetermined bending region of the flexible display device.
9. The flexible display device of claim 7, further comprising:
the optical refraction layer is formed on the surfaces of the multiple sections of module materials and comprises a first refraction area and a second refraction area, and the second refraction area covers the contact positions of the multiple sections of module materials;
wherein the refractive index of the second refractive region is configured to: and adjusting the refractive index of the display light transmitted by the contact positions among the multiple sections of module materials to be the same as the display light transmitted by the first refraction area.
10. The flexible display device of claim 9, wherein the optically refractive layer is an optically adhesive glue layer.
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| CN201710775898.3A CN107516472B (en) | 2017-08-31 | 2017-08-31 | Flexible display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207818085U (en) | 2017-12-29 | 2018-09-04 | 昆山国显光电有限公司 | Modular structure and flexible display apparatus including modular structure |
| CN108877512B (en) * | 2018-05-31 | 2021-04-06 | 昆山国显光电有限公司 | Display panel and display device |
| CN110969939A (en) * | 2018-09-28 | 2020-04-07 | 上海和辉光电有限公司 | Foldable display screen and display device |
| CN109147573B (en) * | 2018-10-09 | 2019-12-31 | 武汉华星光电半导体显示技术有限公司 | Display device and protective cover plate |
| CN112703546A (en) * | 2018-11-16 | 2021-04-23 | 深圳市柔宇科技股份有限公司 | Flexible display screen, manufacturing method thereof and flexible display device |
| CN111312075B (en) * | 2020-02-28 | 2022-03-22 | 云谷（固安）科技有限公司 | Display device, preparation method thereof and display screen |
| CN113744636B (en) * | 2020-05-31 | 2022-11-04 | 华为技术有限公司 | Display module and electronic terminal |
| CN112863354B (en) * | 2021-01-22 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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Application publication date: 20171226 Assignee: Yungu (Gu'an) Technology Co., Ltd.|Bazhou Yungu Electronic Technology Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd Assignor: Kunshan Guo Xian Photoelectric Co., Ltd. Contract record no.: X2019990000156 Denomination of invention: Secondary display integration in flexible display devices License type: Common License Record date: 20191030 |
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Effective date of registration: 20191212 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co., Ltd Address before: 215300, No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou, 4 Applicant before: Kunshan Guo Xian Photoelectric Co., Ltd. |
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