CN109256413B - Flexible display panel and device - Google Patents
Flexible display panel and device Download PDFInfo
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- CN109256413B CN109256413B CN201811191072.3A CN201811191072A CN109256413B CN 109256413 B CN109256413 B CN 109256413B CN 201811191072 A CN201811191072 A CN 201811191072A CN 109256413 B CN109256413 B CN 109256413B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention relates to the technical field of display, and discloses a flexible display panel and a flexible display device. In the present invention, a flexible display panel includes: a driving circuit layer, a planarization layer stacked on the driving circuit layer, and an anode pattern of a plurality of pixels disposed on the planarization layer; the flexible display panel further includes: the anode connecting strip is arranged on the planarization layer and is positioned below the anode pattern of at least part of the pixels; the bending resistance of the anode connecting strip is greater than that of the anode pattern; the anode connecting strip is electrically connected with the driving circuit layer, and a plurality of local areas of the anode pattern are electrically connected with the anode connecting strip below the local areas. According to the embodiment of the invention, the anode pattern is electrically connected with the driving circuit through the anode connecting strip, so that the electrical connection between the local anode pattern and the driving circuit is increased, the performance of each part of the anode can be effectively ensured when the anode is cracked, and the reliability of the product is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a flexible display panel and a flexible display device adopting the flexible display panel.
Background
With the development of display technology, display panels are widely applied to portable electronic products such as mobile phones and palm computers, especially flexible display screens, and become the development trend of various intelligent display screens in the future due to the fact that the display panels are more and more popular with users due to the advantages of being foldable, convenient to carry, wide in application range, better in viewing experience and the like. However, the existing flexible display panel still has a large reliability risk when being bent.
The inventor finds that at least the following problems exist in the prior art: in the existing flexible display technology of organic light-Emitting Diode (OLED), the area of the anode of the pixel is large, and the anode is easily broken or peeled off when being bent, which causes the display performance to be reduced.
Disclosure of Invention
Embodiments of the present invention provide a flexible display panel and a flexible display device using the same, in which an anode pattern is electrically connected to a driving circuit layer through an anode connecting strip, and the electrical connection between a local anode pattern and the driving circuit layer is increased, so that the performance of each part of an anode can be effectively ensured when the anode cracks, and the reliability of a product can be improved.
To solve the above technical problem, an embodiment of the present invention provides a flexible display panel, including: a driving circuit layer, a planarization layer stacked on the driving circuit layer, and an anode pattern of a plurality of pixels disposed on the planarization layer; the flexible display panel further includes: the anode connecting strip is arranged on the planarization layer and is positioned below the anode pattern of at least part of the pixels; the bending resistance of the anode connecting strip is greater than that of the anode pattern; the anode connecting strip is electrically connected with the driving circuit layer, and the plurality of local areas of the anode pattern are electrically connected with the anode connecting strip below the local areas.
Embodiments of the present invention also provide a flexible display device, including the flexible display panel as described above.
Compared with the prior art, the anode connecting strip connected with the driving circuit layer is arranged below the anode pattern on the flattening layer, and the plurality of local areas of the anode pattern are electrically connected with the anode connecting strip below the local areas, so that power can be supplied to a plurality of positions (also called multiple points) on the anode pattern through the anode connecting strip, when the anode pattern is bent and broken, the broken part can still provide an electric signal through the anode connecting strip connected with the broken part, the failure risk of the anode pattern of the broken part is greatly reduced, and the reliability of a product is improved.
As an embodiment, the anode connecting strip is a closed ring-shaped connecting strip located below the anode pattern, so that the connecting structure of the anode connecting strip and the driving circuit of the corresponding anode pattern is simple, and the connecting position between the anode pattern and the anode connecting strip is increased conveniently.
As an embodiment, the anode pattern is rectangular, the anode connecting strip includes a plurality of disconnected first straight segments, and each first straight segment is distributed in a rectangular shape; the anode connecting strip further comprises a plurality of bending parts, and two adjacent first straight sections are connected through the bending parts respectively.
As an embodiment, the bending portion includes a second straight segment and two oblique segments, the first straight segment is parallel to the second straight segment of the connected bending portion, and two ends of the first straight segment are respectively connected with the second straight segment through the two oblique segments of the bending portion; the second straight section of the bending part is compared with the first straight section connected with the bending part and is far away from the center of the anode connecting strip, so that the anode connecting strip has a bending and turning structure, the bending resistance of the anode connecting strip is improved, and the reliability of a product is ensured.
As an embodiment, the flexible display panel further includes a connection reinforcing layer disposed between the anode pattern and the planarization layer; the connection reinforcing layer covers the anode connecting strip, an exposure structure is formed for exposing the connecting parts on the anode connecting strip, and the anode pattern is electrically connected with the connecting parts. The adhesion between the anode pattern and the bonding layer can be increased by connecting the reinforcing layer, and the anode pattern is prevented from falling off when bent.
As an embodiment, the material of the connection strengthening layer adopts silicon nitride or silicon oxide.
As an embodiment, the flexible display panel further includes a pixel defining layer disposed on the planarization layer; the pixel defining layer covers a portion of the connection enhancing layer.
As an embodiment, the flexible display panel further includes a connection reinforcing layer disposed between the anode pattern and the planarization layer; the connection reinforcing layer covers the anode connecting strip, a rectangular groove is formed for exposing each first straight section on the anode connecting strip, and the local area of the anode pattern is electrically connected with each exposed first straight section. The rectangular groove is simple in forming process, the connecting sections can be conveniently exposed, and part of the anode connecting strip is still covered by the connecting reinforcing layer, so that the anode connecting strip and the bonding layer can be fixed more firmly.
As an example, the anode connecting strip is prepared by using any one of the following: ag or a memory alloy.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic cross-sectional view of a flexible display panel according to a first embodiment of the present invention;
FIG. 2 is a schematic top view of an anode connection strip of a flexible display panel according to a first embodiment of the invention;
fig. 3 is a schematic cross-sectional view of a flexible display panel according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the anode connection strip and the connection reinforcement layer of a flexible display panel according to a second embodiment of the present invention;
FIG. 5 is a schematic top view of an exposed structure of a connection reinforcement layer of a flexible display panel according to a second embodiment of the present invention;
FIG. 6 is a schematic top view of the anode connecting strip, the connection reinforcing layer and the anode pattern of the flexible display panel according to the second embodiment of the present invention;
FIG. 7 is a schematic top view illustrating the matching relationship among the anode connecting strips, the connection reinforcing layer, the anode pattern and the pixel defining layer of the flexible display panel according to the second embodiment of the present invention;
fig. 8 is an interface schematic diagram of a flexible display panel adopting another exposure structure according to a second embodiment of the present invention;
fig. 9 is a flowchart of a method for manufacturing a flexible display panel according to a third embodiment of the invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
A first embodiment of the present invention relates to a flexible display panel. Referring to fig. 1, the flexible display panel includes: the flexible substrate 1, the driving circuit layer 2 disposed on the flexible substrate 1, the planarization layer 3 stacked on the driving circuit layer 2, and the anode patterns 40 of the plurality of pixels disposed on the planarization layer 3, wherein the anode patterns 40 of the pixels may be arranged in an array on the planarization layer 3, and for the sake of brevity, only one anode pattern is shown in fig. 1. The flexible display panel further includes: and the anode connecting strip 41 is arranged on the planarization layer 3 and positioned below the anode pattern 40 of at least part of the pixels, and the bending resistance of the anode connecting strip 41 is greater than that of the anode pattern 40, so that the anode connecting strip is not easy to break when bent. The anode connecting bar 41 is electrically connected to the driving circuit layer 2, for example, through a contact hole 42 formed on the planarization layer 3. The anode pattern 40 has a plurality of local regions electrically connected to the anode connecting bar 41 thereunder, i.e. the anode pattern 40 is in contact connection with a plurality of positions on the anode connecting bar 41. Compared with the prior art, the anode connecting strip 41 connected with the driving circuit layer 2 is arranged below the anode pattern 40 on the planarization layer 3, and the plurality of local areas of the anode pattern 40 are electrically connected with the anode connecting strip 41 below the local areas, so that power can be supplied to a plurality of positions on the anode pattern 40 through the anode connecting strip 41, when the anode pattern is bent and broken, the broken part can still provide an electric signal through the anode connecting strip connected with the broken part, the failure risk of the anode pattern of the broken part is greatly reduced, and the reliability of a product is improved. The following describes the implementation details of the flexible display panel of the present embodiment in detail, and the following is only provided for the convenience of understanding and is not necessary for implementing the present embodiment.
Specifically, the bending requirements of different display areas of the flexible display panel may be different, for example, some display areas may require a larger bending degree, and some display areas may require a smaller bending degree. Therefore, in practical applications, the anode connection bars 41 may be provided for all the anode patterns 40 in the flexible display panel, or the anode connection bars 41 may be provided for the anode patterns 40 with the required bending degree being larger in the flexible display panel, and the anode connection bars 41 may not be provided for the anode patterns 40 with the required bending degree being smaller. For example, the anode connection bars 41 are provided for the anode patterns 40 in the central area of the flexible display panel, and the anode connection bars 41 are not provided for the anode patterns 40 in the edge area of the flexible display panel.
In the present embodiment, the shape of the anode pattern 40 is, for example, a rectangle, but is not limited thereto, and in some examples, the anode pattern may also be other shapes such as a circle, a pentagon, and the like. The structure of the anode pattern 40 may be a three-layer composite structure of ITO/Ag/ITO (transparent indium tin oxide/silver/transparent indium tin oxide) or the like. However, in some examples, the anode pattern may be a mixed conductive layer formed of a metal and a transparent conductive film. Alternatively, in some examples, when the anode layer is a reflective electrode film layer, the reflective electrode film layer may be formed of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), or a mixture thereof, and an Indium Tin Oxide (ITO) transparent conductive film, indium-doped zinc oxide (IZO), zinc oxide (ZnO), indium oxide, or the like may be formed on the reflective electrode film layer. The structure of the anode pattern is not particularly limited in this embodiment, and any anode structure that can be realized falls within the protection scope of this embodiment.
In this embodiment, the anode connection bar 41 may be a closed ring-shaped connection bar located below the anode pattern 40. Specifically, the anode connecting bar 41 may be an anode connecting line having a certain width, and the closed ring-shaped anode connecting bar 41 is that each portion of the anode connecting bar 41 has no break point and is capable of being conducted with each other, so that the anode connecting bar 41 only needs to be connected with the driving circuit of the corresponding anode pattern 40 at a single point, for example, the anode connecting bar 41 may be connected with the driving circuit through a contact hole (also referred to as a conductive via hole), thereby simplifying the connection structure between the anode connecting bar 41 and the driving circuit of the corresponding anode pattern 40. It should be understood that the anode connection strip 41 may also include a plurality of disconnected portions, for example, two sub-connection strips, each sub-connection strip having one or more connection points with the anode pattern 40, and each sub-connection strip being connected to the driving circuit of the corresponding anode pattern. The driving circuit of the anode pattern 40 may be a Thin Film Transistor (TFT), but not limited thereto.
In this embodiment, the anode connecting strip 41 may be bent, so as to improve the bending resistance of the anode connecting strip 41. In some examples, the anode connecting bar 41 may also have a rectangular straight bar structure. The anode connecting bar 41 may be made of metal with better bending resistance, such as Ag (silver) or memory alloy. The memory alloy includes, but is not limited to, nitinol, copper-based memory alloy, and the like. The memory alloy has excellent mechanical properties, and has the advantages of shape memory effect, superelasticity, low density, high strength, high damping and the like, so that the manufactured anode connecting strip has better bending resistance and is not easy to break. However, the anode connecting strip is not limited thereto, and may be made of other materials capable of meeting the requirement of bending resistance.
Please refer to fig. 2, which shows a structure of a closed ring-shaped anode connecting strip 41 with a bent shape. Specifically, the anode connection bar 41 includes, for example, a plurality of broken first straight segments 410 and a plurality of bent portions 411. Each of the first straight segments 410 is distributed in a rectangular shape, that is, each of the first straight segments 410 is formed on each side of a predetermined rectangle. Two adjacent first straight sections 410 are connected by a bent part 411 respectively, so that each first straight section 410 and the bent part 411 can be connected into a bent and convoluted closed annular anode connecting strip 41. The number of the anode connecting bars 41 in this embodiment is not particularly limited, and for example, two anode connecting bars 41 may be correspondingly disposed in one anode pattern. Specifically, the bent portion 411 includes, for example, a second straight segment 4110 and two oblique segments (4111, 4112). The first straight segments 410 are parallel to the second straight segments 4110 of the connected bent portions 411, and two ends of each first straight segment 410 are connected to the second straight segments 4110 through two oblique segments (4111, 4112) of the bent portion 411. The second straight segment of the bending portion 411 is far away from the center of the anode connecting bar 41 than the first straight segment 410 connected to the bending portion 411, that is, each second straight segment 4110 is located outside each parallel first straight segment, and each second straight segment 4110 is also in a rectangular distribution. Thus, each first straight segment 410 may be considered an inner circle of the anode connecting bar 41, and each second straight segment 4110 may be considered an outer circle of the anode connecting bar 41. In practical applications, each segment of the anode connecting bar 41 may be electrically connected to the anode pattern 40, or only the inner circle of the anode connecting bar 41, that is, each first straight segment 410 is electrically connected to the anode pattern 40. The specific shape of the anode connecting strip is not limited in this embodiment, for example, each second straight segment may be replaced by a zigzag shape, or the second straight segment may be eliminated, that is, each first straight segment is directly connected by two oblique segments. The shape of the anode connecting strip in this embodiment is not particularly limited, and any shape that can meet the requirement of bending resistance is within the protection scope of this embodiment, for example, the bending portion may also be an arc-shaped structure.
The flexible display panel may further include a pixel defining layer 5 disposed on the planarization layer 3 and a light emitting layer 6 formed between the pixel defining layer 5 and the anode pattern 40. The pixel defining layer 5 can be prepared by a known process, and will not be described herein. The pixel defining layer 5 may be formed using an organic material such as Polyimide (PI), Polyamide (PA), benzocyclobutene (BCB), acryl resin, or phenol resin. The light-emitting layer 6 is formed by a display technology such as an organic light-emitting diode, a quantum dot light-emitting diode, or the like, but is not limited thereto.
Compared with the prior art, the anode graph is powered by the anode connecting strip with good bending resistance, the anode connecting strip is connected with a plurality of local positions (such as the edge area of the anode graph) of the anode graph, the adhesion force between the anode graph and the substrate (each layer below the anode graph in the flexible display panel can be called as the substrate) can be increased, the possibility that the anode graph falls off when being bent is reduced, more local areas of the anode graph can be independently connected with the driving circuit, and therefore when the anode graph is broken, the broken part can still be connected with the driving circuit through the anode connecting strip connected with the broken part, the risk of anode failure is greatly reduced, and the reliability of a product is improved. Compared with the multipoint electrical connection realized through the contact holes, the anode connection strip can conveniently increase the power supply position of the anode graph (which can be equivalent to the number of the power supply points), so that a better multipoint power supply effect is achieved.
A second embodiment of the present invention relates to a flexible display panel. The second embodiment is improved on the basis of the first embodiment, and the main improvements are as follows: in the second embodiment, a connection reinforcing layer is further arranged between the anode pattern and the anode connecting strip below the anode pattern, so that the adhesion between the anode pattern and the bonding layer can be further improved, and the risk of falling off of the anode pattern during bending is reduced.
Referring to fig. 3, the flexible display panel of the present embodiment further includes a connection reinforcing layer 7 disposed between the anode pattern 40 and the planarization layer 3, wherein the connection reinforcing layer 7 covers the anode connecting bars 41 and forms an exposed structure for exposing the connecting portions on the anode connecting bars 41, and the anode pattern 40 is electrically connected to the connecting portions. The present embodiment is described by taking as an example the specific structure of the anode connecting bar 41 in the first embodiment, and the exposed structure may be, for example, a rectangular groove 70 for exposing each first straight segment 410 on the anode connecting bar 41. In this way, the portion of the anode connecting strip, for example, the outer ring thereof, still covers under the connection reinforcing layer 7, so that the fixation between the anode connecting strip and the substrate can be more firm. However, in practical applications, the exposure structure may be used to expose the anode connecting bar 41 entirely or expose other segments on the anode connecting bar 41.
Further, in the present embodiment, the pixel defining layer 5 may cover a portion of the connection enhancing layer 7.
In this embodiment, the material of the connection reinforcing layer 7 may be, for example, silicon nitride or silicon oxide. However, the bonding reinforcement layer may be made of other materials that have high adhesion to the anode pattern.
The following describes the manufacturing method of the flexible display panel of the present embodiment in detail. Referring to fig. 4, anode connecting strips 41 corresponding to each anode pattern are formed on the planarization layer 3, and the anode connecting strips 41 may adopt the anode connecting strip structure with the bending and convolution shape of the first embodiment, which is not described herein again. A connection reinforcing layer 7 is formed on each anode connecting bar 41, and the connection reinforcing layer 7 is formed by, for example, a physical vapor deposition process to cover each anode connecting bar 41. Referring to fig. 5, after the connection reinforcing layer 7 is prepared, an exposed structure, such as a rectangular groove 70 for exposing each first straight segment of the inner ring of the anode connecting bar 41, may be formed through a dry etching process, and the rectangular groove 70 penetrates through the connection reinforcing layer 7. Referring to fig. 6, after forming the rectangular grooves 70 for exposing each first straight segment, the anode patterns 40 may be formed by an evaporation process, and the anode patterns 40 fill the rectangular grooves 70 to be electrically connected to the exposed portions of the anode connection bars 41. Referring to fig. 7, after the anode pattern is formed, a pixel defining layer 5 is formed on the planarization layer 3 at the edge of the anode pattern 40, and the pixel defining layer 5 may cover a portion of the connection enhancing layer 7.
In this embodiment, the anode pattern is in contact connection with each first straight segment on the anode connecting strip 41 exposed by the rectangular groove, and since each first straight segment in the rectangular groove is distributed at intervals and electrically connected, the anode connecting strip 41 provides a plurality of power supply positions for the anode pattern. Referring to fig. 8, in some examples, the anode connecting strips 41 may be rectangular, and the exposed structure may be a plurality of through grooves penetrating the reinforcing layer, each through groove may expose a small section of the anode connecting strip 41, and the anode pattern 40 is electrically connected to the exposed small sections, thereby increasing the local power supply capability of the anode pattern.
Compared with the previous embodiment, the embodiment not only can make the fixation of the anode connecting strip more firm by covering the part of the anode connecting strip with the connecting reinforcing layer, but also can better prevent the anode pattern from falling off when being bent because the adhesion force of the connecting reinforcing layer and the anode pattern is stronger.
A third embodiment of the invention relates to a flexible display device comprising a flexible display panel as described in the first or second embodiment. The flexible display device can be applied to an electronic apparatus that can be equipped with a display. The electronic device may be a smart phone, a tablet computer, a media player, a wristwatch device, a pendant device, a headset or an ear plug device, a game device, a navigation device, etc., and the embodiment is not particularly limited to the type of the electronic device.
A fourth embodiment of the present invention relates to a method for manufacturing a flexible display panel, and as shown in fig. 9, the method for manufacturing a flexible display panel of the present embodiment includes steps 901 to 903. Please refer to fig. 3 to 7 for the structure and the manufacturing process of the flexible display panel manufactured in this embodiment.
Step 901: a flexible substrate is provided.
Step 902: a drive circuit layer and a planarization layer are sequentially formed on a flexible substrate.
The driving circuit layer and the planarization layer can be formed by known processes, and are not described herein.
Step 903: a plurality of anode connection bars and a plurality of anode patterns are formed on the planarization layer.
The anode connecting strip is positioned below the anode pattern, a plurality of local areas of the anode pattern are electrically connected with the anode connecting strip below the local areas, and the anode connecting strip is electrically connected with the driving circuit layer.
In step 903, referring to fig. 4, a plurality of anode connecting strips may be formed on the upper surface of the planarization layer by using a physical vapor deposition and wet etching process. Each anode connecting strip may adopt a closed ring structure with a bending convolution structure as described in the first or second embodiment, and will not be described herein. A connection reinforcing layer 7 is formed on each anode connecting bar 41, and the connection reinforcing layer 7 is formed by, for example, a physical vapor deposition process to cover each anode connecting bar 41. With continued reference to fig. 5, after the connection reinforcement layer 7 is prepared, an exposed structure, such as a rectangular groove 70 for exposing each first straight segment of the inner circle of the anode connecting bar 41, may be formed by a dry etching process, and the rectangular groove 70 penetrates through the connection reinforcement layer 7. With continued reference to fig. 6, after forming the rectangular grooves 70 for exposing each first straight segment, the anode patterns 40 may be formed by an evaporation process, and the anode patterns 40 fill the rectangular grooves 70 to be electrically connected to the exposed portions of the anode connecting bars 41. Referring to fig. 7, after the anode pattern is formed, a pixel defining layer 5 is formed on the planarization layer 3 at the edge of the anode pattern 40, and the pixel defining layer 5 may cover a portion of the connection enhancing layer 7.
It should be noted that, in some examples, the connection reinforcing layer may be eliminated, that is, the anode pattern is directly formed after the anode connecting strip is formed, and the edge of the anode pattern may cover the inner ring of the anode connecting strip or the entire anode connecting strip.
It is to be understood that this embodiment is a manufacturing method embodiment corresponding to the first or second embodiment, and the embodiment can be implemented in cooperation with the first or second embodiment. The related technical details mentioned in the first or second embodiment are still valid in this embodiment, and are not described herein again to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first or second embodiment.
Compared with the prior art, the anode connecting strip with good bending resistance provides multipoint connection for the anode pattern, so that the adhesion between the anode pattern and the substrate can be increased, the possibility of falling off of the anode pattern during bending is reduced, and a plurality of sub-areas of the anode pattern can be independently connected with the driving circuit, so that when the anode pattern is broken, the broken part can still be connected with the driving circuit through the connection point of the sub-area where the broken part is located; and cover part anode connecting strip through connecting the enhancement layer, not only can make the fixed of anode connecting strip more firm, moreover because the adhesion of connecting the enhancement layer and anode pattern is stronger, can prevent better that the anode pattern drops when buckling, consequently can greatly reduced anode failure risk, improve product reliability.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A flexible display panel, comprising: a driving circuit layer, a planarization layer stacked on the driving circuit layer, and an anode pattern of a plurality of pixels disposed on the planarization layer;
the flexible display panel further includes: the anode connecting strip is arranged on the planarization layer and is positioned below the anode pattern of at least part of the pixels; the bending resistance of the anode connecting strip is greater than that of the anode pattern;
the anode connecting strip is electrically connected with the driving circuit layer, and a plurality of local areas of the anode pattern are electrically connected with the anode connecting strip below the local areas;
the anode connecting strip comprises a plurality of disconnected first straight sections and a plurality of bent parts, and two adjacent first straight sections are connected through the bent parts respectively.
2. The flexible display panel of claim 1, wherein the anode connection bar is a closed loop connection bar located under the anode pattern.
3. The flexible display panel of claim 2, wherein the anode pattern is rectangular and each of the first straight segments is rectangular.
4. The flexible display panel according to claim 3, wherein the bending portion comprises a second straight segment and two oblique segments, the first straight segment is parallel to the second straight segment of the connected bending portion, and two ends of the first straight segment are respectively connected to the second straight segment through the two oblique segments of the bending portion; the second straight section of the bending part is far away from the center of the anode connecting strip compared with the first straight section connected with the bending part.
5. The flexible display panel according to any one of claims 1 to 4, further comprising a connection reinforcement layer disposed between the anode pattern and the planarization layer;
the connection reinforcing layer covers the anode connecting strip, an exposure structure is formed for exposing the connecting parts on the anode connecting strip, and the anode pattern is electrically connected with the connecting parts.
6. The flexible display panel of claim 5, wherein the material of the connection reinforcing layer is silicon nitride or silicon oxide.
7. The flexible display panel of claim 5, further comprising a pixel defining layer disposed on the planarization layer;
the pixel defining layer covers a portion of the connection enhancing layer.
8. The flexible display panel of claim 4, further comprising a connection reinforcement layer disposed between the anode pattern and the planarization layer;
the connection reinforcing layer covers the anode connecting strip, a rectangular groove is formed for exposing each first straight section on the anode connecting strip, and the local area of the anode pattern is electrically connected with each exposed first straight section.
9. The flexible display panel of claim 1, wherein the anode connector strip is prepared using any one of: ag or a memory alloy.
10. A flexible display device comprising the flexible display panel according to any one of claims 1 to 9.
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| CN201811191072.3A CN109256413B (en) | 2018-10-12 | 2018-10-12 | Flexible display panel and device |
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| CN110246876B (en) * | 2019-06-03 | 2021-07-06 | 深圳市华星光电半导体显示技术有限公司 | A light-emitting layer structure and display device |
| CN115050801A (en) * | 2022-07-12 | 2022-09-13 | Tcl华星光电技术有限公司 | Display panel, preparation method thereof and display device |
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| CN103426904B (en) * | 2013-08-02 | 2015-11-11 | 京东方科技集团股份有限公司 | A kind of flexible organic light emitting diode display and preparation method thereof |
| CN106783910A (en) * | 2015-11-23 | 2017-05-31 | 上海和辉光电有限公司 | Flexible OLED display panel anode preparation method and display panel preparation method |
| CN106601776A (en) * | 2016-12-26 | 2017-04-26 | 武汉华星光电技术有限公司 | Flexible amoled display panel |
| CN107957813B (en) * | 2017-11-22 | 2019-09-13 | 武汉华星光电半导体显示技术有限公司 | A kind of flexible touch screen and manufacturing method thereof |
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