CN109037279A - A kind of display panel - Google Patents

A kind of display panel Download PDF

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Publication number
CN109037279A
CN109037279A CN201810812550.1A CN201810812550A CN109037279A CN 109037279 A CN109037279 A CN 109037279A CN 201810812550 A CN201810812550 A CN 201810812550A CN 109037279 A CN109037279 A CN 109037279A
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CN
China
Prior art keywords
layer
via hole
signal line
metal contact
power signal
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Granted
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CN201810812550.1A
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Chinese (zh)
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CN109037279B (en
Inventor
吴绍静
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN201810812550.1A priority Critical patent/CN109037279B/en
Publication of CN109037279A publication Critical patent/CN109037279A/en
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/131Interconnections, e.g. wiring lines or terminals
    • H10K59/1315Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/1201Manufacture or treatment

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The present invention provides a kind of display panel, comprising: underlay substrate;Tft layer is prepared on the underlay substrate comprising the first area of corresponding display area, and the second area on the outside of the first area, tft layer part corresponding with the second area includes power signal line;Metal contact layer and pixel unit layer are provided on the tft layer, the pixel unit layer includes cathode layer;Two surfaces of the power signal line and the metal contact layer are provided with insulating layer, and overlapped between the metal contact layer and the power signal line by the first overlapping regions, it is overlapped between the metal contact layer and the cathode layer by the second overlapping regions;Wherein, via hole is provided on the insulating layer, the power signal line also passes through the via hole with the metal contact layer and the cathode layer and overlaps.

Description

A kind of display panel
Technical field
The present invention relates to field of display technology more particularly to a kind of display panels.
Background technique
AMOLED display panel is increasingly becoming a new generation because of the characteristics such as its high contrast, wide colour gamut, low-power consumption, foldable Display technology.As the size of AMOLED display panel is gradually increased, display resolution is higher and higher, panel power signal wire Length increases, and width becomes smaller, and conductive line resistance values increase.When driving the IC number of delivering letters to luminescence unit, the voltage drop on conducting wire also can Increase, the signal strength for causing the luminescence unit from signal IC different distance to obtain is different, causes luminance nonuniformity, i.e., so-called letter Number line drop (IR drop) phenomenon.
As the frame of AMOLED display panel has the tendency that being gradually reduced, the design size of above-mentioned panel power signal wire It is bound to smaller and smaller, resistance value will increase, and the voltage drop on power signal line also increases, to influence the display effect of display panel Fruit.
Therefore, the prior art is defective, needs to improve.
Summary of the invention
The present invention provides a kind of display panel, can reduce the pressure drop on display panel voltage source signal wire, to effectively press down Power supply signal line drop phenomenon processed.
To solve the above problems, technical solution provided by the invention is as follows:
The present invention provides a kind of display panel, comprising:
Underlay substrate;
Tft layer is prepared on the underlay substrate, and the tft layer includes corresponding display area First area, and the second area on the outside of the first area, the tft layer and the second area pair The part answered includes power signal line;
Metal contact layer is set on the tft layer;
Pixel unit layer is set on the metal contact layer, and the pixel unit layer includes cathode layer;
Two surfaces of the power signal line and the metal contact layer are provided with insulating layer, and the metal contacts It is overlapped between layer and the power signal line by the first overlapping regions, is passed through between the metal contact layer and the cathode layer Second overlapping regions overlap joint;
Wherein, via hole, the power signal line and the metal contact layer and the yin are provided on the insulating layer Pole layer is also overlapped by the via hole.
It according to one preferred embodiment of the present invention, include inorganic insulation layer, the inorganic insulation in the tft layer The position of corresponding first overlapping regions of layer is provided with the first via hole, and the power signal line is set to the inorganic insulation layer On.
According to one preferred embodiment of the present invention, first via hole corresponds to the setting of first overlapping regions interval, described The cross sectional shape of power signal line is waveform.
According to one preferred embodiment of the present invention, first via hole corresponds to first overlapping regions, and first mistake The cross sectional shape in hole is ladder-like.
According to one preferred embodiment of the present invention, first is provided between the power signal line and the metal contact layer has Machine insulating layer, first organic insulator are provided with the in the overlapping region of the power signal line and the metal contact layer Two via holes, the metal contact layer are overlapped by second via hole and the power signal line.
According to one preferred embodiment of the present invention, second via hole is from the boundary of first overlapping regions to the overlapping The boundary interval in region is arranged.
According to one preferred embodiment of the present invention, the aperture openings of second via hole by first overlapping regions boundary Extend to the boundary of the overlapping region, and between the boundary on the boundary or the overlapping region perpendicular to first overlapping regions Every setting.
According to one preferred embodiment of the present invention, it is organic exhausted that second is provided between the metal contact layer and the cathode layer Edge layer, is arranged organic luminous layer on second organic insulator, second organic insulator with the organic luminous layer Non-overlapping Domain be provided with third via hole, the cathode layer passes through the third via hole and the metal contact layer overlaps.
According to one preferred embodiment of the present invention, the third via hole is from the boundary of second overlapping regions to described non-heavy The boundary interval setting in folded region.
According to one preferred embodiment of the present invention, the aperture openings of the third via hole by second overlapping regions boundary Extend to the boundary of the Non-overlapping Domain, and the side on the boundary or the Non-overlapping Domain perpendicular to second overlapping regions The setting of boundary interval.
The invention has the benefit that compared to existing display panel, display panel provided by the invention, by will be electric Source signal line or the insulating layer on metal contact layer surface are patterned, and form Via Design to increase power signal line and metal The contact area of contact layer and cathode layer reduces transmission resistance and voltage drop, effectively promotes display panel uniformity of luminance.By Reduce in transmission resistance, the pressure drop that power signal line generates reduces, i.e. IR drop is improved.It is set carrying out narrow frame Timing can reduce the size of power signal line, and bring IR drop problem can be compensated by this programme, therefore this programme The design of narrow frame display panel can be achieved.
Detailed description of the invention
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 of invention 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 the display panel structure schematic diagram that the embodiment of the present invention one provides;
Fig. 2 is display panel structure schematic diagram provided by Embodiment 2 of the present invention;
Fig. 3 is the display panel structure schematic diagram that the embodiment of the present invention three provides.
Specific embodiment
The explanation of following embodiment is referred to the additional illustration, the particular implementation that can be used to implement to illustrate the present invention 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 to 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 the display panel of the prior art, there are the voltage drop on power signal line is larger, causes to shine not Uniformly, thus the technical issues of influencing the display effect of display panel, the present embodiment is able to solve the defect.
As shown in Figure 1, the display panel structure schematic diagram provided for the embodiment of the present invention one.The display panel includes: Underlay substrate 10, the underlay substrate 10 can be flexible substrate or glass substrate;Tft layer (does not indicate) in figure, system For on the underlay substrate 10, the tft layer includes inorganic insulation layer 11, between the inorganic insulation layer 11 includes Insulating layer, gate insulation layer, buffer layer etc.;The tft layer includes the first area of corresponding display area, and is located at Second area on the outside of the first area, tft layer part corresponding with the second area include power supply letter Number line 12, can provide luminous signal for pixel region;The tft layer further includes that pixel-driving circuit 14 and GOA drive Circuit 13, the corresponding first area of the pixel-driving circuit 14, the corresponding second area of the GOA driving circuit 13, And between the pixel-driving circuit 14 and the power signal line 12;First organic insulator 15, is prepared in the electricity 12 surface of source signal line, first organic insulator 15 are formed via one of processing procedure of planarization layer of the correspondence first area , and patterned in the position of the correspondence power signal line 12, form the first overlapping regions 150;Metal contact layer 16, It is prepared on first organic insulator 15, and by described between the metal contact layer 16 and the power signal line 12 First overlapping regions 150 overlap joint;Second organic insulator 17, the corresponding first area prepare and define pixel region, One side edge is located on the metal contact layer 16;Pixel unit layer 18, the corresponding pixel region setting, the pixel unit Layer 18 includes anode layer, organic luminous layer 180 and cathode layer 181;Wherein, the metal contact layer 16 can be with the anode layer Through with along with processing procedure formed.
Second organic insulator 17 forms the second overlapping regions 170, and the cathode layer 181 is overlapped by described second Region 170 and the metal contact layer 16 overlap.In display panel work, the driving signal that IC is provided is loaded in the electricity On source signal line 12, the power signal line 12 and the metal contact layer 16 are contacted, then by the cathode layer 181 with it is described The contact of metal contact layer 16 passes to the driving signal on the cathode layer 181 of the pixel unit layer 18, makes organic Luminescent layer 180 can normal luminous.
Wherein, the position of corresponding first overlapping regions 150 of the inorganic insulation layer 11 is provided with the first via hole 110, The power signal line 12 is set on the inorganic insulation layer 11.Corresponding first overlapping regions of first via hole 110 150 interval settings, the cross sectional shape of the power signal line 12 are waveform.
After being prepared on the inorganic insulation layer 11 due to the power signal line 12 of transmission driving signal, section To no longer be it is planar, but wavy as illustrated in the drawing, the metal contact layer 16 connects with the power signal line 12 For contacting surface product in addition to the upper surface of the power signal line 12, there are also the sides of first via hole 110 to contact, the increasing of contact area Voltage drop can be effectively reduced greatly.In addition, being used for transmission the power signal line 12 of driving signal becomes wavy from planar, Cross-sectional area when its signal transmits increases, and by computing the resistor value formula R=L/S, resistance value can also become smaller.Therefore this mode can It is effectively improved voltage drop both ways.
Preferably, the power signal line 12 is low potential source line, can provide low potential source voltage.
In addition, first via hole 110 of corresponding first overlapping regions 150 can also be designed as cross sectional shape in ladder Shape, i.e., the different inorganic films of the described tft layer correspondence first overlapping regions 150 via openings on to Under be sequentially reduced.
As shown in Fig. 2, being display panel structure schematic diagram provided by Embodiment 2 of the present invention.Compared to the area of embodiment one Be not characterized in that: the section of the power signal line 20 of the present embodiment be it is planar, 20 surface of power signal line is prepared with the One organic insulator 21, first organic insulator 21 are provided with the first overlap joint in the position of the correspondence power signal line 20 Region 210, metal contact layer 22 is prepared in 21 surface of the first organic insulator, and passes through first overlapping regions 210 It is overlapped with the power signal line 20;The power signal line 20 and the metal contact layer 22 are there are overlapping region, and described the One organic insulator 21 is provided with the second via hole 211 in the correspondence overlapping region, in addition to first overlapping regions 210, The metal contact layer 22 is also overlapped by second via hole 211 with the power signal line 20.The metal contact layer 22 Surface is prepared with the second organic insulator 23, and second organic insulator 23 forms the second overlapping regions 230;Pixel unit layer In cathode layer 24 pass through second overlapping regions 230 and overlapped with the metal contact layer 22.Wherein, second via hole 211 are arranged from the boundary of first overlapping regions 210 to the boundary interval of the overlapping region.The present embodiment is by increasing institute The contact area stated between the metal contact layer 22 and the power signal line 20 is subtracted with reducing resistance to reach The purpose of the voltage drop generated on the small power signal line 20.
In addition, second via hole 211 can also be distributed with other arrangement modes, and such as: second via hole 211 Aperture openings extended from the boundary of first overlapping regions 210 to the boundary of the overlapping region, and perpendicular to described the The boundary interval setting on the boundary or the overlapping region of one overlapping regions 210.That is, second mistake in the diagram Hole 211 is the mode of lateral separation arrangement from left to right, in other embodiments or longitudinal gap arrangement mode, i.e., Vertical with the direction that is intervally arranged of the diagram arrange.Alternatively, second via hole 211 is only a long hole;It is right herein The size and shape of second via hole 211 are without limitation.
As shown in figure 3, the display panel structure schematic diagram provided for the embodiment of the present invention three.Compared to the area of embodiment one Be not characterized in that: the section of the power signal line 30 of the present embodiment be it is planar, 30 surface of power signal line is prepared with the One organic insulator 31, first organic insulator 31 are provided with the first overlap joint in the position of the correspondence power signal line 30 Region 310, metal contact layer 32 is prepared in 31 surface of the first organic insulator, and passes through first overlapping regions 310 It is overlapped with the power signal line 30;Second organic insulator 33 is prepared in 32 surface of metal contact layer, and forms second Overlapping regions 330;Pixel unit layer is prepared on second organic insulator 33, and the pixel unit layer includes organic hair Photosphere 34 and cathode layer 35, due to the limitation of evaporated device etc., the design edge of second organic insulator 33 will exceed The edge of the organic luminous layer 34, but this will limit the contact of the cathode layer 35 with the metal contact layer 32.Therefore, institute It states the second organic insulator 33 and the Non-overlapping Domain with the organic luminous layer 34 is provided with third via hole 331, the cathode Layer 35 is overlapped by second overlapping regions 330 and the third via hole 331 and the metal contact layer 32.
Wherein, the third via hole 331 is from the boundary of second overlapping regions 330 to the boundary of the Non-overlapping Domain Interval setting.Alternatively, the aperture openings of the third via hole 331 are from the boundary of second overlapping regions 330 to described non-heavy The boundary in folded region extends, and the boundary interval on the boundary or the Non-overlapping Domain perpendicular to second overlapping regions 330 Setting.
The present embodiment is by increasing the contact area between the metal contact layer 32 and the cathode layer 35, so that resistance Resistance value reduces, to achieve the purpose that reduce the voltage drop generated on the power signal line 30.
It certainly, in other embodiments may include the whole side of above-described embodiment one, embodiment two and embodiment three Case, or comprising any two of them scheme can increase the power signal line and the metal contact layer and described The contact area of cathode layer, to achieve the purpose that reduce voltage drop, details are not described herein again.
Display panel provided by the invention, by the way that power signal line or the insulating layer on metal contact layer surface are carried out pattern Change, form Via Design to increase the contact area of power signal line and metal contact layer and cathode layer, reduces transmission resistance And voltage drop, effectively promote display panel uniformity of luminance.Since transmission resistance reduces, the pressure drop that power signal line generates Reduce, i.e. IR drop is improved.When carrying out narrow frame design, the size of power signal line, bring IR can be reduced Drop problem can be compensated by this programme, therefore this programme can realize the design of narrow frame display panel.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but 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 subjects to the scope of the claims.

Claims (10)

1. a kind of display panel characterized by comprising
Underlay substrate;
Tft layer is prepared on the underlay substrate, and the tft layer includes the first of corresponding display area Region, and the second area on the outside of the first area, the tft layer are corresponding with the second area Part includes power signal line;
Metal contact layer is set on the tft layer;
Pixel unit layer is set on the metal contact layer, and the pixel unit layer includes cathode layer;
Two surfaces of the power signal line and the metal contact layer are provided with insulating layer, and the metal contact layer with It is overlapped between the power signal line by the first overlapping regions, passes through second between the metal contact layer and the cathode layer Overlapping regions overlap joint;
Wherein, via hole, the power signal line and the metal contact layer and the cathode layer are provided on the insulating layer Also overlapped by the via hole.
2. display panel according to claim 1, which is characterized in that include inorganic insulation in the tft layer Layer, the position that the inorganic insulation layer corresponds to first overlapping regions are provided with the first via hole, the power signal line setting In on the inorganic insulation layer.
3. display panel according to claim 2, which is characterized in that first via hole corresponds to first overlapping regions Interval setting, the cross sectional shape of the power signal line are waveform.
4. display panel according to claim 2, which is characterized in that first via hole corresponds to first overlap Domain, and the cross sectional shape of first via hole is ladder-like.
5. display panel according to claim 1, which is characterized in that the power signal line and the metal contact layer it Between be provided with the first organic insulator, weight of first organic insulator in the power signal line and the metal contact layer Folded region is provided with the second via hole, and the metal contact layer is overlapped by second via hole and the power signal line.
6. display panel according to claim 5, which is characterized in that second via hole is by first overlapping regions Boundary is arranged to the boundary interval of the overlapping region.
7. display panel according to claim 5, which is characterized in that the aperture openings of second via hole are by described first The boundary of overlapping regions extends to the boundary of the overlapping region, and the boundary or described heavy perpendicular to first overlapping regions The boundary interval setting in folded region.
8. display panel according to claim 1, which is characterized in that set between the metal contact layer and the cathode layer Be equipped with the second organic insulator, organic luminous layer be set on second organic insulator, second organic insulator with The Non-overlapping Domain of the organic luminous layer is provided with third via hole, and the cathode layer passes through the third via hole and the metal Contact layer overlap joint.
9. display panel according to claim 8, which is characterized in that the third via hole is by second overlapping regions Boundary is arranged to the boundary interval of the Non-overlapping Domain.
10. display panel according to claim 8, which is characterized in that the aperture openings of the third via hole are by described The boundary of two overlapping regions extends to the boundary of the Non-overlapping Domain, and boundary or institute perpendicular to second overlapping regions State the boundary interval setting of Non-overlapping Domain.
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CN109994534A (en) * 2019-04-23 2019-07-09 武汉华星光电半导体显示技术有限公司 The peripheral circuit structure and OLED display panel of OLED display panel
CN110931531A (en) * 2019-11-27 2020-03-27 武汉华星光电半导体显示技术有限公司 OLED display panel and preparation method thereof
CN111755488A (en) * 2020-06-17 2020-10-09 福建华佳彩有限公司 AMOLED display screen structure and preparation method thereof
WO2022227897A1 (en) * 2021-04-29 2022-11-03 Oppo广东移动通信有限公司 Display panel and preparation method therefor, and electronic device
US11665944B2 (en) 2020-08-06 2023-05-30 Chengdu Boe Optoelectronics Technology Co., Ltd. Display panel and display device

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