CN108598144A - Oled display panel - Google Patents
Oled display panel Download PDFInfo
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- CN108598144A CN108598144A CN201810688811.3A CN201810688811A CN108598144A CN 108598144 A CN108598144 A CN 108598144A CN 201810688811 A CN201810688811 A CN 201810688811A CN 108598144 A CN108598144 A CN 108598144A
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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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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention provides a kind of OLED display panel, includes at least：Region is bent, and at least one signal lead being set in bending region；Signal lead includes the first metal layer and the second metal layer above the first metal layer；The height of the first metal layer and second metal layer is cyclically-varying.It has the beneficial effect that：OLED display panel provided by the invention, set signal lead to the double-deck undulated metal, reduce damage of the bending stress to signal lead, simultaneously, after random layer metal fracture, another layer of metal still can keep signal transmission, to reduce the risk that signal caused by signal lead is broken because bending for a long time can not transmit, improve the service life of display panel.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of OLED display panels.
Background technology
It is aobvious to be increasingly becoming a new generation because of the characteristics such as its high contrast, wide colour gamut, low-power consumption, foldable for OLED display panel
Show technology.Compared to LCD technology, a big advantage of OLED can be applied to for it in flexible display panels, especially by institute
The lower frame of panel is bent to panel rear by meaning pad bending (pad bending) technology, realizes the purpose for reducing frame.
However, largely transmitting the metal routing of signal can be integrated at the lower edge of display panel, in rear end module group procedure
It is middle to carry out bending action folding and the back side fixed to display panel, a more serious risk can be brought in this way, i.e., when long
Between the stress that generates in bending process so that the case where metal routing in the region is often broken, to cause letter
Number lost contact.
In conclusion the OLED display panel of the prior art, the metal routing positioned at bending region because keeping curved for a long time
Folding state, meeting affected by force leads to risk increase of breaking, and then reduces the service life of OLED display panel.
Invention content
The present invention provides a kind of OLED display panel, and in the bending region of OLED display panel, setting bending stress buffers
Layer, to reduce the stress generated to metal routing when OLED display panel bending, to solve the OLED display panel of the prior art,
Metal routing positioned at bending region because keeping bending state, meeting affected by force to lead to risk increase of breaking for a long time, in turn
The technical issues of reducing the service life of OLED display panel.
To solve the above problems, technical solution provided by the invention is as follows：
The present invention provides a kind of OLED display panel, and the OLED display panel includes：
Display area；
Region is bent, at least side of the display area is located at；And
At least one signal lead is set to the bending region；
The signal lead includes at least the first metal layer, the second metal layer on the first metal layer, with
And it is formed in the insulating layer between the first metal layer and the second metal layer；The first metal layer and second gold medal
The subregion for belonging to layer is in electrical contact, and at least one layer of height in the first metal layer and the second metal layer is week
Phase property changes.
According to one preferred embodiment of the present invention, the material of the insulating layer is organic material.
According to one preferred embodiment of the present invention, the height in the first metal layer and the second metal layer is the period
Property variation.
According to one preferred embodiment of the present invention, the height change trend in the first metal layer and the second metal layer
Part is identical.
According to one preferred embodiment of the present invention, the first metal layer and the second metal layer are described exhausted by being formed in
Via in edge layer is electrically connected, and the change of the height in the first metal layer and the second metal layer is arranged in the via
At change trend change.
According to one preferred embodiment of the present invention, the height change trend in the first metal layer and the second metal layer
On the contrary.
According to one preferred embodiment of the present invention, the first metal layer and the second metal layer are described exhausted by being formed in
Via in edge layer is electrically connected, and the via setting is minimum in the first metal layer and the second metal layer spacing
Place.
According to one preferred embodiment of the present invention, bending direction of the signal lead along the bending region extends.
According to one preferred embodiment of the present invention, the bending section includes basal layer and coating, the basal layer and institute
It is organic insulator to state coating, and the first metal layer is formed in the substrate surface, and the coating is formed in institute
State second metal layer surface.
According to one preferred embodiment of the present invention, it is respectively provided with along bending direction and perpendicular to bending direction on the inside of the basal layer
For contoured surface, the coating inside is disposed as contoured surface along bending direction and perpendicular to bending direction.
Beneficial effects of the present invention are：The present invention provides a kind of OLED display panel, and signal lead, which is set as double-deck, to be risen
Shape metal is lied prostrate, damage of the bending stress to signal lead is reduced, meanwhile, after random layer metal fracture, another layer of metal is still
Signal transmission can be kept, to reduce the risk that signal caused by signal lead is broken because bending for a long time can not transmit,
Improve the service life of display panel.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some invented
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is OLED display panel structural schematic diagram provided by the invention.
Fig. 2 is the signal lead structural schematic diagram of the embodiment one of OLED display panel provided by the invention.
Fig. 3 is another signal lead structural schematic diagram of the embodiment one of OLED display panel provided by the invention.
Fig. 4 is the signal lead structural schematic diagram of the embodiment two of OLED display panel provided by the invention.
Fig. 5 is another signal lead structural schematic diagram of the embodiment two of OLED display panel provided by the invention.
Specific implementation mode
The explanation of following embodiment is referred to the additional illustration, to illustrate the present invention can be used to implement particular implementation
Example.The direction term that the present invention is previously mentioned, such as [on], [under], [preceding], [rear], [left side], [right side], [interior], [outer], [side]
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is with being given the same reference numerals in the figure.
The present invention is directed to existing OLED display panel, is located at the metal routing in bending region because long-time is in bending
State is stressed influence, causes the risk that metal routing wrecks to increase, and then influence the service life of OLED display panel, this
Embodiment can solve the defect.
As shown in Figure 1, OLED display panel provided by the invention, including display area, the connection display area it is curved
Folding area domain 102 and the signal lead for being set to the bending region 102.
The display area includes array substrate 103, and the array substrate 103 includes the TFT (film crystals of array distribution
Pipe) device, the TFT device surfaces are correspondingly arranged on OLED luminescent devices；101 one end of the display area has non-display area
Domain 105, array is provided with OLED luminescent layers 104 in the display area 101, in the non-display area 105 definition stated
Bend region 102 and binding region 106.
The non-display area 105 is provided with the signal lead of one or more, and one end of the signal lead extends to institute
It states the corresponding TFT devices of connection, the opposite other end of the signal lead in display area 101 and extends to the binding
In region 106, control circuit board is connected.
The signal lead includes at least two layers metal layer being oppositely arranged, that is, the first metal layer and second metal layer；Its
In, at least one layer of height in the first metal layer and the second metal layer is cyclically-varying so that described first
Metal layer combines to form interval lap segment and segregation section with the second metal layer, and the interval lap segment and the segregation section are handed over
For setting；Preferably, the height of the first metal layer and the second metal layer is cyclically-varying.The interval overlap joint
Section refers to the section that the first metal layer and the second metal layer are electrically connected, for example, described the of the interval lap segment
It is connected by via between one metal layer and the second metal layer, for another example, the first metal layer of the interval lap segment
It is fitted and connected with second metal layer contraposition；The segregation section refers to the first metal layer and is not contacted with the second metal layer
Section, for example, insulating layer is arranged between the first metal layer and the second metal layer of the segregation section.
Double-level-metal cabling provided by the invention, the bending region 102 in bending process, the segregation section it is described
The first metal layer and the stress of the second metal layer are minimum, and the metal layer for being located at the region is not easy to break；The interval overlap joint
The first metal layer of section and the stress of the second metal layer are larger, are located at the metal layer in the region compared with easy fracture, however,
Even if the metal layer in the region is broken, the first metal layer and the second metal layer are still electrically connected, signal
It can be transmitted by the metal layer of the segregation section.
Embodiment one
OLED display panel provided in this embodiment, including at least the first metal layer and for being set to the bending region
Two metal layers, wherein the height change trend of the first metal layer and the second metal layer is opposite.Variation tendency refers to
The height change of the first metal layer and the second metal layer is formed by undulations, and variation tendency is on the contrary, refer to institute
State the undulations of the first metal layer and the symmetrical setting of undulations of the second metal layer.
As shown in Fig. 2, the OLED display panel includes bending region, the bending region includes basal layer 201, first
Metal layer 202, insulating layer 203, second metal layer 204 and coating 205, the first metal layer 202 are formed in the base
201 surface of bottom, the coating 205 are formed in 204 surface of the second metal layer, the basal layer 201, the insulating layer
203 and the coating 205 be all made of organic insulating material preparation；The basal layer 201 is the first organic insulator 203,
The insulating layer 203 is the second organic insulator 203, and the coating 205 is third organic insulator 203.
First organic insulator 203 forms contoured surface, institute by the Patternized technique of nano impression or mask
It states 203 surface of the first organic insulator and forms the contoured the first metal layer 202；202 surface shape of the first metal layer
At having organic insulating material layer, i.e., described second organic insulator 203, by the Patternized technique of nano impression or mask at this
Organic insulating material layer surface interval forms trepanning, and the trepanning is for the first metal layer 202 described in exposed portion；Described second
203 surface of organic insulator is formed with the second metal layer 204, and the subregion of the second metal layer 204 is described in
Trepanning connects the first metal layer 202, forms the interval lap segment 206, the institute between the adjacent interval lap segment 206
It states the first metal layer 202 to support by second organic insulator 203 interval with the second metal layer 204, described in formation
Segregation section 207；204 surface of the second metal layer is formed with the third organic insulator 203.
Pass through via between the first metal layer 202 and the second metal layer 204 of the interval lap segment 206
208 connections, alternatively, being aligned between the first metal layer 202 and the second metal layer 204 of the interval lap segment 206
It is fitted and connected.Preferably, the via setting is at the first metal layer and the second metal layer spacing minimum.
First organic insulator 203, second organic insulator 203 and described prepared using organic material
Third organic insulator 203, have certain elasticity, in bending process, organic insulator 203 can support metal layer, from
And bending stress is evenly dispersed, avoid bending stress from concentrating at one and cause to be broken.
Preferably, the section of the first metal layer 202 of the segregation section 207 and the second metal layer 204 is combined
Shape is in polygon.
For example, the section of the first metal layer 202 of the segregation section 207 is trapezoidal recess, the segregation section 207
The section of the second metal layer 204 is trapezoidal protrusion, the first metal layer 202 of the segregation section 207 and described second
The section combined shaped of metal layer 204 is hexagonal；The first metal layer 202 and described the of the interval lap segment 206
Two metal layers 204 are electrically connected.
Further, the trapezoidal recess is symmetrical set with the trapezoidal protrusion；So that the bending section is to described
When the arbitrary lateral bend of OLED display panel, it can reduce bending stress.
Section combined shaped by the first metal layer 202 of the segregation section 207 and the second metal layer 204 is in
Hexagon is arranged, and the interior angle angle of hexagon is all higher than 90 °, and the junction transition of hexagon adjacent edge is gentle so that the separation
The stress in bending of section 207 is smaller.
Preferably, 201 inside of the basal layer is disposed as contoured surface along bending direction and perpendicular to bending direction,
205 inside of the coating is disposed as contoured surface along bending direction and perpendicular to bending direction, can further reduce institute
The bending stress for bending region in various dimensions bending direction is stated, and then reduces the signal lead risk of breakage.
As shown in figure 3, the OLED display panel, including bending region, the bending region includes basal layer 301, the
One metal layer 302, insulating layer 303, second metal layer 304 and coating 305, the first metal layer 302 are formed in described
301 surface of basal layer, the coating 305 are formed in 304 surface of the second metal layer, the basal layer 301, the insulation
Layer 303 and the coating 305 are all made of organic insulating material preparation；The basal layer 301 is the first organic insulator
303, the insulating layer 303 is the second organic insulator 303, and the coating 305 is third organic insulator 303.
The section of the first metal layer 302 is waveform, and the section of the second metal layer 304 is mirror image waveform,
That is, the first metal layer 302 is symmetrical set with the second metal layer 304；The wave crest section of the first metal layer 302
With the trough section of the second metal layer 304 formation interval lap segment 306 in electrical contact, the first metal layer 302
Trough detach to form the segregation section 307 with the wave crest of the second metal layer 304.
For example, passing through between the wave crest section of the first metal layer 302 and the trough section of the second metal layer 304
Via 308 connects.
For another example, it aligns and is bonded between the metal joint face and the first metal layer 302 of the interval lap segment 306
Connection；Wherein, the width of the metal joint face is less than the width of the first metal layer 302 of the interval lap segment 306
Degree；When the bending region bends, the first metal layer 302 second metal layer 304 may generate displacement relatively,
To avoid displacement that the first metal layer 302 of the interval lap segment 306 is caused to be lost with the dislocation of the second metal layer 304
Connection can increase the width of the first metal layer 302 of the interval lap segment 306, the shift length control for making bending generate
System is in the interval lap segment 306.
Precision is prepared to improve corrugated metal, it can be by photoetching process in 303 table of the first organic insulator
Face, 303 surface of the second organic insulator form waveform fluctuating pattern, and then on 303 surface of the first machine insulating layer, described
Second machine insulating layer, 303 surface deposits to form corrugated metal layer.
The bending region can generate stretching action to metal layer, metal layer cracking be easily led to, using arc in bending
The metal layer of protrusion equally has stronger ductility, and the length of metal layer is stretched extensions, while height reduction when bending,
The metal layer of arc-shaped protrusions is changed by whole generation deformation to reduce metal layer molecule gap caused by bending stress, is reduced disconnected
Split risk.
Embodiment two
OLED display panel provided in this embodiment, including at least the first metal layer and the second gold medal for being set to bending region
Belong to layer；The difference between this embodiment and the first embodiment lies in the height change of the first metal layer and the second metal layer becomes
Gesture part is identical, wherein is located at the height change trend of the first metal layer and the second metal layer of the segregation section
It is identical, it is differed positioned at the first metal layer of the interval lap segment and the height change trend of the second metal layer.
As shown in figure 4, the OLED display panel, including bending region, the bending region includes basal layer 301, the
One metal layer 302, insulating layer 303, second metal layer 304 and coating 305, the first metal layer 302 are formed in described
301 surface of basal layer, the coating 305 are formed in 304 surface of the second metal layer, the basal layer 301, the insulation
Layer 303 and the coating 305 are all made of organic insulating material preparation；The basal layer 301 is the first organic insulator
303, the insulating layer 303 is the second organic insulator 303, and the coating 305 is third organic insulator 303.
The section of the first metal layer 302 of the segregation section 307 be trapezoidal recess, the segregation section 307 it is described
The section of second metal layer 304 includes trapezoidal recess, and connects the supporting surface of the adjacent trapezoidal recess, the supporting surface bottom
Portion forms a metal joint face, and the metal joint face is located at the interval lap segment 306.Preferably, the first metal layer
It is electrically connected by the via being formed in the insulating layer with the second metal layer, the via is arranged described first
At height change trend change in metal layer and the second metal layer, that is, the metal joint face is overlapped with the interval
It is connected by the via 308 between the first metal layer 302 of section 306.For another example, the metal joint face and the interval
It aligns and is fitted and connected between the first metal layer 302 of lap segment 306.
The bending region can generate stretching action to metal layer, easily lead to metal layer and crack in bending, and described second
The trapezoidal recess and supporting surface of metal layer form M shape protrusions, are in multistage bending structure using the metal layer of M shape protrusions, have compared with
Strong ductility, the length of metal layer is stretched extension when bending, while height reduces, and the metal layer for passing through M shape protrusions is whole
It generates deformation to reduce metal layer molecule gap caused by bending stress to change, reduces risk of breakage.
As shown in figure 5, OLED display panel provided in this embodiment, including bending region, the bending region includes base
Bottom 501, the first metal layer 502, insulating layer 503, second metal layer 504 and coating 505, the first metal layer 502
It is formed in 501 surface of the basal layer, the coating 505 is formed in 504 surface of the second metal layer, the basal layer
401, the insulating layer 503 and the coating 505 are all made of organic insulating material preparation；The basal layer 501 is first
Organic insulator 503, the insulating layer 503 are the second organic insulator 503, and the coating 505 is third organic insulator
503。
The section of the first metal layer 502 is waveform, and the section of the second metal layer 504 is arranged for multiple intervals
Arc-shaped concave, the arc-shaped concave both ends are connected with slope surface, and the end of the adjacent slope surface is connected by metal joint face,
In, the arc-shaped concave of the second metal layer 504 is corresponding with the recessed portion of the first metal layer 502, forms the separation
Section 507, the metal joint face and the protrusion of the first metal layer 502 of the second metal layer 504 are in electrical contact, form institute
State interval lap segment 506.
The arc that waveform to improve the first metal layer 502 prepares precision and the second metal layer 504 is recessed
Face prepares precision, can by photoetching process 503 surface of the first organic insulator formed waveform fluctuating pattern,
Second organic insulator, 503 surface forms arc-shaped concave pattern, and then deposits shape on 503 surface of the first machine insulating layer
Waviness metal layer deposits to form arc-shaped concave metal layer on 503 surface of the second machine insulating layer.
For example, passing through via between the metal joint face and the first metal layer 502 of the interval lap segment 506
508 connections.
For another example, it aligns and is bonded between the metal joint face and the first metal layer 502 of the interval lap segment 506
Connection；Wherein, the width of the metal joint face is less than the width of the first metal layer 502 of the interval lap segment 506
Degree；When the bending region bends, the first metal layer 502 second metal layer 504 may generate displacement relatively,
To avoid displacement that the first metal layer 502 of the interval lap segment 506 is caused to be lost with the dislocation of the second metal layer 504
Connection can increase the width of the first metal layer 502 of the interval lap segment 506, the shift length control for making bending generate
System is in the interval lap segment 506.
The arc-shaped concave of the second metal layer 504, the concave surface bended with the first metal layer 502 of wavy cross-section
Direction is consistent, 504 bending stress of the first metal layer 502 and the second metal layer of the segregation section 507 in bending
It is identical, lower the risk of breakage of 507 metal layer of segregation section；Meanwhile the slope surface of the second metal layer 504 and the arc-shaped concave
In conjunction with there is stronger ductility, can generate deformation by the way that the second metal layer 504 is whole and reduce bending stress when bending
Caused metal layer molecule gap variation, further decreases risk of breakage.
Beneficial effects of the present invention are：The present invention provides a kind of OLED display panel, and signal lead, which is set as double-deck, to be risen
Shape metal is lied prostrate, damage of the bending stress to signal lead is reduced, meanwhile, after random layer metal fracture, another layer of metal is still
Signal transmission can be kept, to reduce the risk that signal caused by signal lead is broken because bending for a long time can not transmit,
Improve the service life of display panel.
In conclusion although the present invention is disclosed above with preferred embodiment, above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention is subject to the range that claim defines.
Claims (10)
1. a kind of OLED display panel, which is characterized in that the OLED display panel includes：
Display area；
Region is bent, at least side of the display area is located at；And
At least one signal lead is set to the bending region；
The signal lead includes at least the first metal layer, second metal layer and shape on the first metal layer
Insulating layer between the first metal layer described in Cheng Yu and the second metal layer；The first metal layer and the second metal layer
Subregion it is in electrical contact, and at least one layer of height in the first metal layer and the second metal layer be periodically
Variation.
2. OLED display panel according to claim 1, which is characterized in that the material of the insulating layer is organic material.
3. OLED display panel according to claim 1, which is characterized in that the first metal layer and second metal
Height in layer is cyclically-varying.
4. OLED display panel according to claim 3, which is characterized in that the first metal layer and second metal
Height change trend part in layer is identical.
5. OLED display panel according to claim 4, which is characterized in that the first metal layer and second metal
Layer is electrically connected by the via being formed in the insulating layer, and via setting is in the first metal layer and described the
At height change trend change in two metal layers.
6. OLED display panel according to claim 3, which is characterized in that the first metal layer and second metal
Height change trend in layer is opposite.
7. OLED display panel according to claim 6, which is characterized in that the first metal layer and second metal
Layer is electrically connected by the via being formed in the insulating layer, and via setting is in the first metal layer and described the
Two metal interlevels away from minimum at.
8. OLED display panel according to claim 1, which is characterized in that the signal lead is along the bending region
Bending direction extends.
9. OLED display panel according to claim 1, which is characterized in that the bending region includes basal layer and covering
Layer, the basal layer and the coating are organic insulator, and the first metal layer is formed in the substrate surface, institute
It states coating and is formed in the second metal layer surface.
10. OLED display panel according to claim 9, which is characterized in that on the inside of the basal layer along bending direction and
It is disposed as contoured surface perpendicular to bending direction, is all provided with along bending direction and perpendicular to bending direction on the inside of the coating
It is set to contoured surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688811.3A CN108598144A (en) | 2018-06-28 | 2018-06-28 | Oled display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688811.3A CN108598144A (en) | 2018-06-28 | 2018-06-28 | Oled display panel |
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| CN108598144A true CN108598144A (en) | 2018-09-28 |
Family
ID=63634885
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| CN201810688811.3A Pending CN108598144A (en) | 2018-06-28 | 2018-06-28 | Oled display panel |
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| CN111142696B (en) * | 2018-11-05 | 2023-04-28 | 上海和辉光电股份有限公司 | Bendable touch screen |
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| CN110491288A (en) * | 2019-07-25 | 2019-11-22 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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