CN108922911A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN108922911A CN108922911A CN201810858106.3A CN201810858106A CN108922911A CN 108922911 A CN108922911 A CN 108922911A CN 201810858106 A CN201810858106 A CN 201810858106A CN 108922911 A CN108922911 A CN 108922911A
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- display panel
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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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
A kind of display panel provided in an embodiment of the present invention and display device, by being to be additionally provided with machine buffer layer on the underlay substrate of display panel.In bent area, it designs organic buffer layer progress concaveconvex structure to form multiple " paddy " and " ridge ", the biggish device of area accounting in the driving unit of display panel is placed on " ridge " position, so that the biggish device of area accounting in bending operation be avoided to will cause the excessive problem of stress.The lesser various types of signal cabling of stress (metal layer patterning formation) is arranged in the position of " paddy " simultaneously.By the way that device and signal lead to be separately positioned on to the position of " paddy " and " ridge " of organic buffer layer, to reduce the stress of bent area.
Description
【Technical field】
The present invention relates to field of display technology more particularly to a kind of display panel and display devices.
【Background technique】
Currently, display technology has penetrated into the various aspects of people's daily life, and correspondingly, more and more materials and skill
Art is used for display screen.Now, the display screen of mainstream mainly has liquid crystal display and organic light-emitting diode (OLED) display screen.Its
In, due to the self-luminosity energy of Organic Light Emitting Diode (Organic Light-Emitting Diode) display screen, compared to
Liquid crystal display eliminates the backlight module most to consume energy, therefore has the advantages that more energy efficient；In addition, organic light-emitting diode display
Screen also has the characteristics that flexible bendable, by using flexible base board, the multiple conductive layers sequentially formed on flexible substrates, and packet
Thin film transistor (TFT) drive array layer, anode layer, organic luminous layer, cathode layer and thin-film encapsulation layer are included, so that OLED display screen
With excellent bent performance.
It is aobvious to flexibility as user is more and more vigorous to the flexible bendable of display terminal product or the demand of folding property
Show the stability of properties of product and number resistant to bending be also require it is higher and higher, especially for the drive array film layer of bent area
Design with luminescence unit brings more and more challenges.
【Summary of the invention】
In view of this, the embodiment of the invention provides a kind of display panel and display devices, by the soft of display panel
Property underlay substrate on it is much more additional one layer of organic buffer layer is set, and set in bent area by carrying out bending resistance folded structure to the organic layer
Meter promotes bending resistance to reduce the stress of bent area.
On the one hand, the embodiment of the invention provides a kind of display panel, which includes bent area, the display surface
Plate includes flexible substrate substrate and multiple display units, and the display unit includes at least driving transistor and storage capacitance；
The display panel further includes first buffer layer, the first buffer layer be located at the flexible substrate substrate with it is described
Between display unit；
In the bent area of the display panel, the first buffer layer includes multiple concaveconvex structures being continuously arranged；It is described
Concaveconvex structure includes recess portion and protrusion；
The driving transistor and/or the storage capacitance are correspondingly arranged with the protrusion.
Preferably, the first buffer layer includes high-molecular organic material；The elasticity modulus of the first buffer layer is less than
Equal to 5Gpa；The thickness range of the first buffer layer is 2~8 μm.
Preferably, the first buffer layer is formed from the same material with the flexible substrate substrate；The first buffer layer
Thickness be greater than the flexible substrate substrate thickness.
Preferably, the opening depth of the recess portion is 2~8 μm；The cross section of the recess portion is described recessed in subtriangular
Portion has the first angle, and first angle is less than 60 °.
Preferably, the cross section of the recess portion is in approximate trapezoid, semicircle or zigzag etc..
Preferably, the display unit further includes multiple switch transistor, and the area of the switching transistor is less than described
Drive the area of transistor；The switching transistor is correspondingly arranged with the protrusion.
Preferably, the display panel further includes metal layer and inorganic insulation layer；Inorganic insulation layer covering described the
One buffer layer；The metal layer covers the inorganic insulation layer.
Preferably, the display panel further includes a plurality of metal routing by the metal layer patterning formation；The gold
The recess portion for belonging to cabling and the concaveconvex structure is correspondingly arranged.
Preferably, the display panel further includes non-bent area；In the non-bent area, the first buffer layer is uniform
Change structure, is arranged in the first buffer layer without the concaveconvex structure.
Preferably, the display panel further includes between the first buffer layer and the flexible substrate substrate
Two inorganic buffer layers；The second inorganic buffer layer includes one of silicon nitride, silica or silicon oxynitride or multiple material.
Preferably, the display panel is flexible bendable display panel, and the bending radius of curvature of the display panel is
0.3mm~1.0mm.
On the other hand, the embodiment of the invention provides a kind of display device, the display device includes above-mentioned display panel.
A kind of display panel provided in an embodiment of the present invention and display device, by being on the underlay substrate of display panel
It is additionally provided with machine buffer layer.In bent area, design organic buffer layer progress concaveconvex structure to form multiple " paddy " and " ridge ",
The biggish device of area accounting in the driving unit of display panel is placed on " ridge " position, to avoid operating in bending
The middle biggish device of area accounting will cause the excessive problem of stress.Simultaneously by the lesser various types of signal cabling (metal layer of stress
Patterning is formed) it is arranged in the position of " paddy ".By device and signal lead are separately positioned on organic buffer layer " paddy " and
The position of " ridge ", to reduce the stress of bent area.In addition, the embodiment of the present invention has by one layer be arranged on underlay substrate
Machine buffer layer increases the whole bending of display panel, and close to organic buffer layer on underlay substrate, not will cause to aobvious
Show that the formation process of all devices and signal lead has an impact on driving unit on panel.
【Detailed description of the invention】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 2 be in Fig. 1 display panel in a kind of schematic diagram of bending state；
Fig. 3 be in Fig. 1 display panel in the schematic diagram of another bending state；
Fig. 4 is the another schematic diagram of display panel in Fig. 1；
Fig. 5 is the another structural schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 6 is the partial enlargement diagram of first buffer layer in Fig. 5；
Fig. 7 is that display panel is in the schematic diagram under bending state in Fig. 5；
Fig. 8 is the drive array schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 9 is the cross-sectional view of drive array part of devices in 8；
Figure 10 is the cross-sectional view of drive array in bent area 101 in Fig. 9；
Figure 11 is the structural schematic diagram of display panel provided by another embodiment of the present invention；
Figure 12 is the structural schematic diagram of display panel provided by further embodiment of this invention；
Figure 13 is the cross-sectional view of drive array in Fig. 9；
Figure 14 is the structural schematic diagram of display device provided by the embodiment of the present invention.
【Specific embodiment】
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate：Individualism A, exists simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though it is anti-to describe electrostatic using term first, second, third, etc. in embodiments of the present invention
Unit is protected, but these transistors should not necessarily be limited by these terms.These terms are only used to for buffer layer being distinguished from each other out.For example,
In the case where not departing from range of embodiment of the invention, first buffer layer can also be referred to as second buffer layer, and similarly, second is slow
First buffer layer can also be referred to as by rushing layer.
Inventor is by careful further investigation, for flexible display panels in the prior art in bent area due to curved
Folding operates and causes stress excessive to cause to cause to show bad problem to the display device of bent area, and provides one kind
Solution.Specifically as shown in Fig. 1~Figure 13, wherein Fig. 1 is the structural representation of display panel provided by the embodiment of the present invention
Figure；Fig. 2 be in Fig. 1 display panel in a kind of schematic diagram of bending state；Fig. 3 be in Fig. 1 display panel in another bending
The schematic diagram of state；Fig. 4 is the another schematic diagram of display panel in Fig. 1；Fig. 5 be display panel provided by the embodiment of the present invention again
One structural schematic diagram；Fig. 6 is the partial enlargement diagram of first buffer layer in Fig. 5；Fig. 7 is that display panel is in bending in Fig. 5
Schematic diagram under state；Fig. 8 is the drive array schematic diagram of display panel provided by the embodiment of the present invention；Fig. 9 is driven in 8
The cross-sectional view of array portion device；Figure 10 is the cross-sectional view of drive array in bent area 101 in Fig. 9；Figure 11
It is the structural schematic diagram of display panel provided by another embodiment of the present invention；Figure 12 is provided by further embodiment of this invention
The structural schematic diagram of display panel；Figure 13 is the cross-sectional view of drive array in Fig. 9.The embodiment of the invention provides one kind
Display panel and display device, by one layer of organic buffer layer of additional more settings on the underlay substrate of display panel, and curved
Folding area is by carrying out the design of bending resistance folded structure to the organic layer, to reduce the stress of bent area, promotes bending resistance.
Specifically as shown in Figure 1, display panel includes non-bent area the embodiment of the invention provides a kind of display panel 100
102 and bent area 101.Wherein, bent area 101 refers to that the display panel can carry out different angle along the bending direction axis X-X '
Bending.Specifically as shown in Fig. 2, the display panel 100 carries out complete symmetrical fold along bending axis X-X ', display surface is realized
The size of plate is reduced to the half size under unfolded state.Or as shown in figure 3, the display panel 100 can be along bending axis
It is folded according to a fold mechanism (being not shown in Fig. 3), arcuate structure is presented in the bent area 101 under folded state.Certainly,
In embodiments of the present invention, which can be folded towards the direction of on-screen displays, referred to as " infolding "；It can also
Fold referred to as " being folded outward " towards the direction away from on-screen displays.In addition, the bent area of display panel is to include aobvious
Show area and non-display area, and being in the display area of bent area 101 includes multiple luminescence unit D11, as shown in Figure 4.Namely
Say that in the display area of bent area 101, being can carry out normal display picture as other regions of viewing area.
The state why can be realized folding or bending for the display panel in the embodiment of the present invention, be because
In the embodiment of the present invention, the flexible substrate substrate which uses, just can guarantee that the display panel can be realized can be soft
The bent state of property, in embodiments of the present invention the bending radius of curvature of the display panel between 0.3mm~1.0mm, thus
Bending operation can freely be realized by guaranteeing user.In addition, in present specification, " bending " be include symmetrical fold etc. no
With the bending operation on angle direction.Only there is provided two different bending states as example by Fig. 2 and Fig. 3.
In the related art, current Flexible Displays product is based on flexible transparent substrate substrate, on its basis
The formation of drive array is carried out, wherein all kinds of device formation are by deposited metal layer, inorganic insulation layer, low temperature in drive array
The patternings such as polysilicon layer and organic insulator are formed.Since each film layer is comparatively dense, shape is easy in bending operating process
At biggish stress, especially when folding operation, the devices such as driving transistor and storage capacitance with larger area accounting
On, it is easy to produce larger stress.In order to the path for generating stress one stress release of offer in drive array, present example
A kind of display panel and display device are provided, specifically as shown in Fig. 5~13, wherein as shown in 8~Figure 10, the display panel
100 include flexible substrate substrate 11 and multiple display units, and display unit includes the drive of luminescence unit D11 and setting of being corresponding to it
Moving cell, the driving unit include multiple transistor T and storage capacitance Cst (rectangular broken line outlines in Fig. 8).Wherein transistor T
Including driving transistor TM (dotted-line ellipse outlines in Fig. 8) and multiple switch transistor T1 (dotted-line ellipse outlines in Fig. 8), such as scheme
Shown in 8, the area accounting of driving transistor TM is greater than the area accounting of switching transistor T1, specifically, switching transistor T1
Pattern area or switching transistor T1 of the pattern area of corresponding semiconductor layer much smaller than the semiconductor layer of driving transistor
Pattern area of the pattern area of corresponding grid layer much smaller than the grid layer of driving transistor.Due to crystalline substance in the driving unit
Body pipe is to be layered on top of each other by different conductive film layers and formed, especially driving transistor TM, since its area accounting is larger, therefore
When carrying out bending operation, it is easy to produce the phenomenon that stress gathers.In addition, for storage capacitance Cst, in order to guarantee its electricity
The storage capacity of lotus, the area of electrode plate are also to need to increase, while and carrying out layers by least two different conductive film layers
It is folded and formation, it is also to be easy to produce stress on storage capacitance Cst to gather now when carrying out bending operation to the display panel
As.
With continued reference to shown in Fig. 5~Fig. 7, the display panel 100 is between flexible substrate substrate 11 and multiple display units
It is provided with first buffer layer 12.And in bent area 101, which includes multiple concaveconvex structures being continuously arranged,
The concaveconvex structure includes recess portion 12a (oval dotted line outlines in Fig. 5) and protrusion 12b (oval dotted line outlines in Fig. 5).At this
In inventive embodiments, by the way that first buffer layer 12 is arranged on flexible substrate substrate 11, to increase flexible substrate substrate 11
Bending resistance, as shown in fig. 7, when carry out bending operation when, since first buffer layer 12 can provide effective stress buffer
Path thereby may be ensured that stress is sufficiently discharged in each device in the display unit of buckled zone.
In embodiments of the present invention, in order to further allow the stress in display unit on each device that can obtain more
Effective release is arranged by will be easy to produce the driving transistor TM that stress gathers in driving unit more as shown in Figure 10
On the protrusion 12b of a continuous concaveconvex structure, in order to further decrease the stress inside display panel, in the embodiment of the present invention
In, it can also be by the way that the storage capacitance Cst in driving unit be also disposed on the protrusion 12b of concaveconvex structure.In addition, in this hair
In bright embodiment, it is preferable that transistor T all in driving unit can be arranged on the protrusion 12b of concaveconvex structure.When
When carrying out bending operation, as shown in fig. 7, transistor and storage capacitance are respectively provided with since the device to be formed is laminated in each conductive film
On the protrusion 12b of concaveconvex structure, then it will not lead to the problem of stress and gather, or be located at even if producing stress and can also have
First buffer layer below device is discharged as stress release path, thus greatly reduces the stress on display panel.
In addition, it is necessary to explanation, described the concave part of the concave-convex structure and protrusion in the present invention is implemented, it is possible to understand that
The concept of corresponding " paddy " and " ridge " is an opposite concept.Specifically, in embodiments of the present invention, recess portion can
To be not understood as carrying out grooving on flexible substrate substrate 11 in first buffer layer 12, the bottom of slot is close to flexible liner base
Plate；The convex part of the concave-convex structure is formed between multiple slots.By forming multiple continuous concaveconvex structures in first buffer layer, protecting
Under the premise of card is to the release of the internal stress of display panel, the bendable folding endurance of bent area is further increased, the curved of bent area is increased
Warpage rate.
How first buffer layer and concaveconvex structure are designed just and can guarantee the stress that can reduce display panel, while energy
Enough meet display panel integrally lightening requirement, present inventor has performed in-depth studies.As shown in Figure 5 and Figure 6, in this hair
In bright embodiment, in order to which the inherent strain of display panel is effectively reduced, in embodiments of the present invention first buffer layer using
Organic high score material with favorable elasticity modulus can be specifically polypropylene high molecular material or polyethylene high score
Sub- material, elasticity modulus are less than or equal to 5Gpa.In addition, in order to guarantee abundant release of the organic buffer layer to stress, at this
In inventive embodiments, by setting first buffer layer between 2~8 μm, in this way can proof stress release, while also not
It can the excessive integral thickness for increasing display panel.In addition, in an embodiment of the present invention, in order to reduce the complexity of technique,
First buffer layer 12 and flexible substrate substrate can be formed from the same material, but in order to guarantee first buffer layer to display panel
The thickness of first buffer layer can be set greater than the thickness of flexible substrate substrate by the release of internal stress.
In addition, with continued reference to shown in Fig. 6, in embodiments of the present invention, by by the opening of the recess portion 12a in concaveconvex structure
Depth d1 is set as 2~8 μm, that is, in the grooving of first buffer layer 12, is to form through slot structure.Meanwhile it is recessed in order to guarantee
The formation of male structure does not influence the integral strength of first buffer layer 12 and stress is effectively reduced, and in embodiments of the present invention, this is recessed
It is subtriangular structure that portion 12a, which has cross section,.Specifically, recess portion 12a has the first folder in embodiments of the present invention
Angle A (it is considered that being the apex angle of triangle), the angle is less than 60 °.
Certainly, in other embodiments of the present invention, for recess portion 12a can specific different set-up mode, it is specific as schemed
It, can be with cross section to be upside-down trapezoid for the recess portion 12a in multiple concaveconvex structures in first buffer layer 12 shown in 11
Structure.The recess portion can be carries out part grooving formation in first buffer layer 12, and the opening depth of the recess portion can be small
In the thickness of first buffer layer, so as to reinforce the mechanical strength of first buffer layer.
It continues to refer to figure 1 shown in 2, can be tool for the recess portion 12a in multiple concaveconvex structures in first buffer layer 12
Having cross section is semicircular structure.The recess portion can be carries out part grooving formation in first buffer layer 12, the recess portion
Opening depth can be the thickness less than first buffer layer, so as to reinforce the mechanical strength of first buffer layer.In addition, another
In one embodiment, the cross section of the recess portion is also possible to other zigzags.Design for recess portion, can be according to different product
Demand is carried out being correspondingly improved setting, no longer be illustrated herein.But it needs to guarantee to be formed between recess portion and recess portion corresponding convex
Portion, the space of the protrusion can be enough to place driving transistor and/or storage capacitance in display unit.
It further include multiple signal leads in the display panel with continued reference to shown in Fig. 8 and Figure 10, the scanning being such as laterally arranged
Signal wire S1, LED control signal line E and reference voltage signal line V；Longitudinally disposed data signal line D1, constant high potential letter
Number line VS1 etc..The above signal lead is continuously arranged on a display panel, no matter being also non-bent area in bent area
In.And these signal leads are usually to be formed by different metal pattern layers.Due to being metal layer patterning formation, therefore these
Signal lead has preferable ductility, and bending resistance is preferable.Therefore in embodiments of the present invention, these metal routings can be arranged
In the recess portion 12a of concaveconvex structure.
Specifically as indicated by 10, for insulating metal layer and other conductive layers such as low temperature semiconductor layer (not shown),
Inorganic insulation layer PV can be set between first buffer layer and metal layer, and specifically, the metal layer patterning multiple metals of formation are walked
Line, such as scan signal line S1；Inorganic insulation layer PV covers first buffer layer 12；Institute's metal layer covers inorganic insulation layer PV.Pass through
Inorganic insulation layer PV is deposited in the first buffer layer 12 with preset thickness, the inherence on inorganic insulation layer PV can be made
Stress is released.
It on the basis of above embodiments, continues to refer to figure 1 shown in 3, in the present invention is implemented, by bent area 101
The middle multiple continuous concaveconvex structures of setting, and transistor in driving unit and storage capacitance are arranged in protrusion, metal routing is set
It sets in corresponding recess portion；Gathering for the inherent strain of bent area is discharged by concaveconvex structure.And in non-bent area 102, have
It is smaller to the component influences of non-bent area when bending operation, in embodiments of the present invention, the first buffering in non-bent area 102
Without grooving on layer 12, that is to say, that no concave-convex structure setting in first buffer layer, to uniform structure.In driving unit
Transistor T and storage capacitance Cst and metal routing are all formed in the flat surface of first buffer layer.By in non-bent area
The homogenization design of first buffer layer 12, can increase the Mechanical Structure Strength of first buffer layer, be further ensured that simultaneously in 102
The planarization of non-display area improves the homogenization of the function of the driving transistor between each driving unit.
In addition, continuing to refer to figure 1 described in 3, in embodiments of the present invention, in order to enhance the whole machinery of display panel 100
Intensity, by the second inorganic buffer layer 13 between first buffer layer 12 and flexible substrate substrate 11, and meanwhile it is aobvious in order to balance
Show the mechanical strength and bending resistance two conflicting performance needs of panel, in the present invention is implemented, the second inorganic buffering
Layer 13 will be much smaller than flexible substrate substrate using one of silicon nitride, silica or silicon oxynitride or multiple material, thickness
11 thickness and the thickness of first buffer layer 12.Specifically, the thickness of the second inorganic buffer layer 13 can be flexible liner base
The one third of plate 11 is smaller.
The embodiment of the invention also provides a kind of display devices, and as shown in figure 14, Figure 14 is provided by the embodiment of the present invention
Display device structural schematic diagram, the display device include above-mentioned display panel 100 wherein, the specific knot of display panel 100
Structure is described in detail in the above-described embodiments, and details are not described herein again.Certainly, display device shown in Figure 14 is only
Schematically illustrate, which can be any such as mobile phone, tablet computer, laptop, electric paper book or television set
Electronic equipment having a display function.
The display device as provided by the embodiment of the present invention includes above-mentioned display panel, which passes through
It is to be additionally provided with machine buffer layer on the underlay substrate of display panel.In bent area, which is subjected to concave-convex knot
Structure designs to form multiple " paddy " and " ridge ", and the biggish device of area accounting in the driving unit of display panel is placed on " ridge "
On position, so that the biggish device of area accounting in bending operation be avoided to will cause the excessive problem of stress.Simultaneously by stress
Lesser various types of signal cabling (metal layer patterning formation) is arranged in the position of " paddy ".By the way that device and signal lead are distinguished
The position of " paddy " and " ridge " of organic buffer layer is set, to reduce the stress of bent area.In addition, the embodiment of the present invention is logical
One layer of organic buffer layer being arranged on underlay substrate is crossed, increases the whole bending of display panel, and close to underlay substrate
Upper organic buffer layer not will cause to the formation process of all devices and signal lead has shadow on driving unit on display panel
It rings.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (12)
1. a kind of display panel, which is characterized in that the display panel includes bent area, and the display panel includes flexible substrate
Substrate and multiple display units, the display unit include at least driving transistor and storage capacitance；
The display panel further includes first buffer layer, and the first buffer layer is located at the flexible substrate substrate and the display
Between unit；
In the bent area of the display panel, the first buffer layer includes multiple concaveconvex structures being continuously arranged；The bumps
Structure includes recess portion and protrusion；
The driving transistor and/or the storage capacitance are correspondingly arranged with the protrusion.
2. display panel according to claim 1, which is characterized in that the first buffer layer includes organic polymer material
Material；The elasticity modulus of the first buffer layer is less than or equal to 5Gpa；
The thickness range of the first buffer layer is 2~8 μm.
3. display panel according to claim 2, which is characterized in that the first buffer layer and the flexible substrate substrate
It is formed from the same material；
The thickness of the first buffer layer is greater than the thickness of the flexible substrate substrate.
4. display panel according to claim 2, which is characterized in that the opening depth of the recess portion is 2~8 μm；
The cross section of the recess portion is in subtriangular, and the recess portion has the first angle, and first angle is less than 60 °.
5. display panel according to claim 2, which is characterized in that the cross section of the recess portion is in approximate trapezoid, semicircle
Shape or zigzag etc..
6. display panel according to claim 1, which is characterized in that the display unit further includes multiple switch crystal
Pipe, the area of the switching transistor are less than the area of the driving transistor；
The switching transistor is correspondingly arranged with the protrusion.
7. display panel according to claim 1, which is characterized in that the display panel further include metal layer and it is inorganic absolutely
Edge layer；
The inorganic insulation layer covers the first buffer layer；
The metal layer covers the inorganic insulation layer.
8. display panel according to claim 7, which is characterized in that the display panel further includes a plurality of by the metal
The metal routing that pattern layers are formed；
The recess portion of the metal routing and the concaveconvex structure is correspondingly arranged.
9. display panel according to claim 1, which is characterized in that the display panel further includes non-bent area；
In the non-bent area, the first buffer layer is to uniform structure, without the concaveconvex structure in the first buffer layer
Setting.
10. display panel according to claim 1, which is characterized in that the display panel further includes being located at described first
The second inorganic buffer layer between buffer layer and the flexible substrate substrate；
The second inorganic buffer layer includes one of silicon nitride, silica or silicon oxynitride or multiple material.
11. described in any item display panels according to claim 1~10, which is characterized in that the display panel is that flexibility can
Display panel is bent, the bending radius of curvature of the display panel is 0.3mm~1.0mm.
12. a kind of display device, which is characterized in that the display device includes the described in any item displays of claim 1~11
Panel.
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| CN111430413B (en) * | 2020-03-31 | 2023-04-18 | 京东方科技集团股份有限公司 | Flexible display panel and flexible display device |
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| CN111627331B (en) * | 2020-05-18 | 2022-04-08 | 武汉华星光电半导体显示技术有限公司 | Display screen and display device |
| CN111627331A (en) * | 2020-05-18 | 2020-09-04 | 武汉华星光电半导体显示技术有限公司 | Display screen and display device |
| CN111757592A (en) * | 2020-06-18 | 2020-10-09 | 昆山国显光电有限公司 | Flexible circuit board and display screen body assembly |
| CN113936549A (en) * | 2020-06-29 | 2022-01-14 | 云谷（固安）科技有限公司 | Bent cushion block, display panel and display device |
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Application publication date: 20181130 |