CN109326632A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109326632A CN109326632A CN201811158208.0A CN201811158208A CN109326632A CN 109326632 A CN109326632 A CN 109326632A CN 201811158208 A CN201811158208 A CN 201811158208A CN 109326632 A CN109326632 A CN 109326632A
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- 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
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a kind of display panel and display device, including flexible base board, multiple thin film transistor (TFT)s, multiple sub-pixel units and multiple signal transmission passages, multiple thin film transistor (TFT)s are formed on the flexible base board, and each thin film transistor (TFT) includes signal end；Each sub-pixel unit includes first electrode, and each sub-pixel unit is formed on a thin film transistor (TFT)；Each signal transmission passage includes the first passage and second channel being electrically connected respectively with the same first electrode, and the first passage and second channel are electrically connected with the same signal end respectively.By at least two channels of setting in the application, so that: even if first electrode is because of bending fracture, the region of first electrode broken apart remains to connect by least two channels with signal end, and the service life of display panel is improved while guaranteeing light-emitting area.
Description
Technical field
This application involves display field more particularly to a kind of display panel and display devices.
Background technique
Oganic light-emitting display device is a kind of selfluminous device that thin emission layer between the electrodes is utilized, therefore can be with
So that whole device is thinner.In addition, oganic light-emitting display device not only has advantage in terms of the energy consumption of low voltage drive, but also
Also there is excellent color realization, response speed, visual angle and contrast.
And flexible organic display device has received widespread attention as next-generation display equipment, it is this to be fabricated at such as
Showing for flexible material (such as plastics) etc forms display unit and conducting wire on substrate flexible, even if thus in sensitive paper one
Sample can also show image when being bent.By taking flexible oganic light-emitting display device as an example, when showing equipment bending, certain film layers may
It is broken because of stress, causes partial failure, cause display area reduction or poor display effect.
Summary of the invention
The application provides a kind of flexible display panels and display device that the service life is lasting.
The application provides a kind of display panel, including flexible base board, multiple thin film transistor (TFT)s, multiple sub-pixel units and more
A signal transmission passage, multiple thin film transistor (TFT)s are formed on the flexible base board, and each thin film transistor (TFT) includes signal
End；Each sub-pixel unit includes first electrode, and each sub-pixel unit is formed on a thin film transistor (TFT)；Often
A signal transmission passage includes the first passage and second channel being electrically connected respectively with the same first electrode, and institute
First passage and second channel is stated to be electrically connected with the same signal end respectively.
Further, the first passage is connected to the first end of first electrode, and the second channel is connected to the first electricity
The second end of pole, the first end and second end are arranged along first direction.
Further, the first passage connects the second channel, and is electrically connected by second channel and the second end
It connects.
Further, the first passage is electrically connected by way of in parallel with second channel.
Further, the area of the signal transmission passage and the ratio range of the area of each sub-pixel unit are
0.6%~12%.
Further, the width range of the by-pass portion is 2-10um.
Further, each signal transmission passage includes third channel, the first passage, second channel, third
Channel is electrically connected the same first electrode and the same signal end, the third channel connection first electrode
Third end, the second end arrange in a second direction with third end, and the first direction and second direction are in an angle.
Further, the first direction is perpendicular to second direction.
Further, each signal transmission passage includes fourth lane, the first passage, second channel, third
Channel, fourth lane are electrically connected the same first electrode and the same signal end, the fourth lane connection
4th end of first electrode, the third end and the 4th end are arranged along first direction.
The application also provides a kind of display device comprising the display panel.
By the way that multiple channels are arranged in the application, even if first electrode is because of bending fracture, first electrode is broken apart
Region remains to connect by least two channels with signal end, and the use of display panel is improved while guaranteeing light-emitting area
Service life.
Detailed description of the invention
Fig. 1 show the schematic cross-sectional view of one embodiment of the application display panel；
Fig. 2 show the first electrode of display panel shown in FIG. 1 and the schematic top plan view of signal transmission passage；
Fig. 3 show the first electrode of the application display panel and the vertical view of one embodiment of signal transmission passage is illustrated
Figure；
Fig. 4 show the first electrode of the application display panel and the vertical view of one embodiment of signal transmission passage is illustrated
Figure；
Fig. 5 show the schematic cross-sectional view for forming thin film transistor (TFT) on flexible substrates；
Fig. 6 show the schematic cross-sectional view that first electrode is formed on thin film transistor (TFT)；
Fig. 7 show the schematic cross-sectional view for forming pixel confining layer on the first electrode；
Fig. 8 is the schematic cross-sectional view that organic luminous layer is formed in pixel openings.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device of some aspects be described in detail in claims, the application.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
Unless otherwise defined, technical term or scientific term used in this application, which are should be in fields of the present invention, has general skill
The ordinary meaning that the personage of energy is understood." first " " second " and class used in present specification and claims
As word be not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.Equally, " one
It is a " or the similar word such as " one " do not indicate that quantity limits yet, but indicate that there are at least one." multiple " or " several " table
Show two and two or more.The similar word such as " comprising " or "comprising" means to appear in the member before " comprising " or "comprising"
Part or object are covered the element for appearing in " comprising " or "comprising" presented hereinafter or object and its are equal, it is not excluded that its
His element or object." connection " either the similar word such as " connected " is not limited to physics or mechanical connection, and
And may include electrical connection, it is either direct or indirect.In present specification and the appended claims
The "an" of used singular, " described " and "the" are also intended to including most forms, unless context clearly shows that
Other meanings.It is also understood that term "and/or" used herein refers to and includes one or more associated to list item
Purpose any or all may combine.
It please refers to shown in Fig. 1, the display panel of the embodiment of the present application includes flexible base board 1, is formed on flexible base board
Multiple thin film transistor (TFT)s 2, the multiple sub-pixel units and multiple signal transmission passages 7 being formed on thin film transistor (TFT), every height
Pixel unit corresponds to a thin film transistor (TFT) 2, and passes through a signal transmission passage electrical connection.Each sub-pixel unit includes shape
At on thin film transistor (TFT) 2 first electrode 3, be formed in first electrode pixel confining layer 4, organic luminous layer 5 and formed
In the second electrode 6 on organic luminous layer, thin film transistor (TFT) has the signal end 21 being electrically connected with first electrode 3 (for example, film
The source-drain electrode of transistor, source-drain electrode mean source electrode or drain electrode).Certainly, display panel further includes hole injection layer, hole transport
The structures such as layer, electron transfer layer, electron injecting layer, hole injection layer and hole transmission layer are located at first electrode (can be used as anode)
Between organic luminous layer, electron transfer layer and electron injecting layer be located at organic luminous layer and second electrode (can be used as cathode) it
Between.When an appropriate voltage is applied, positive hole will be combined with cathode charge in organic luminous layer, generated light, matched according to it
Fang Butong generates red, green and blue RGB three primary colors, constitutes basic color.
The material of flexible base board 1 is, for example, polyimides PI (Polyimide, abbreviation PI) polymer, polycarbonate
(Polycarbonate, abbreviation PC) resin, poly terephthalic acid class PET (Polyethylene terephthalate, abbreviation
PET) plastics etc..
Thin film transistor (TFT) 2 can be formed by depositing a variety of different films in flexible base board 1, and such as semiconductor active layer is situated between
Amorphous silicon hydride (a-Si:H), polysilicon etc. can be selected as main material, energy in electric layer and metal electrode layer, semiconductor active layer
Rank is less than monocrystalline silicon (Eg=1.12eV).
First electrode 3, for example, anode, including conductive material, the conductive material have very high work function, so as to having
Machine luminescent layer provides a hole.First electrode 3 can be made of the transparent conductive material with very high work function.It should
Transparent conductors material includes transparent conductive oxide (TCO), such as tin indium oxide (ITO), indium zinc oxide (IZO), tin indium oxide
Zinc (ITZO), zinc oxide, tin oxide.
Pixel confining layer 4 can be made of inorganic parent's property material and organic thin property material, using the different material of two layers of wellability
The pixel confining layer for expecting composition can make the solution of electroluminescent organic material accurately inkjet printing and to form thickness uniform
Film.
Small molecule type can be selected in the material of organic luminous layer 5 or polymer-type, small molecule type generally use the side of vacuum evaporation
Method assembly device, with both sides outstanding advantages: first is that molecular structure determines, being readily synthesized and purify；Second is that small molecule
Compound mostly uses vacuum evaporation to form a film greatly, easy to form fine and close and pure film.The purity of material is in electroluminescent
Particularly important, the high-purity of material can be reduced to shine and is quenched, and extend device lifetime, to improve luminous efficiency.Also, it is high
The luminescent material of purity is also the essential condition for realizing high quality full-color EL display.Polymer-type can not be deposited, and mostly use wet process
Film, such as rotary coating, inkjet printing technology, silk-screen printing masking technique.These technologies are for vacuum evaporation, work
Skill is simple, and equipment price is cheap, to there is cost advantage in batch production.
Alloy cathode, layered cathode or mixed compound electrode can be selected in second electrode 5, for example, cathode, cathode material,
Alloy cathode is by evaporating the more stable high-work-function metal of the active low workfunction metal of property and chemical property together
It is formed, such as Mg:Ag (10:1), Li:Al (0.6%Li) alloy electrode, work function is respectively 3.7eV and 3.2eV；Layered cathode
By one layer of very thin insulating materials such as LiF, Li2O, MgO, the thicker Al composition in one layer of Al2O3 etc. and outside, electron injection
Can purer Al electrode it is high, higher luminous efficiency and better I-V characteristic curve can be obtained；Mixed compound electrode is will to adulterate
There is the organic layer of low workfunction metal to be clipped between cathode and organic luminous layer, device performance can be substantially improved, typical device is
ITO/NPD/AlQ/AlQ (Li)/Al, maximum brightness mix Li layer device up to 30000Cd/m2 (every square metre of candela), such as nothing,
Brightness is 3400Cd/m2.
Fig. 1 and Fig. 2 is please referred to, what each signal transmission passage 7 was electrically connected with the same first electrode 3 respectively
First passage 71 and second channel 72, and first passage is respectively with same signal end 21 (for example, the source and drain of thin film transistor (TFT) 2
Pole) it is electrically connected, the first passage 71 is electrically connected by way of in parallel with second channel 72.Here " connection " can be directly
It connects in succession, is also possible to be indirectly connected with, be indirectly connected with and for example bridged by other elements or part.The first electrode 3
Including the first area 31 and the second area 32, the first area 311 is electrically connected by first passage 71 with signal end 21, and the second area 312 passes through
Second channel 72 is connect with signal end 21.The first passage 71 is connected to the first end 35 of first electrode, the second channel
72 connect the second end 36 of first electrodes 3, and first passage 71 is needed through second channel 72 and first electrode 3 in the present embodiment
Second end 36 is attached, to be electrically connected with signal end 21.It (hangs down in the length direction X or width direction Y of flexible base board 1
Directly on direction Z), first electrode is covered with pixel openings 41, to ensure that display equipment has sufficiently large light-emitting area.
In the X direction, the width d1 of first passage is less than width (size in X-direction) d2 of first electrode 3, this implementation
In example, the width d1 of first passage 71 and second channel 72 is 2~10mm, the area (first passage of the signal transmission passage
The sum of 71 and the area of second channel 72) ratio with the area (the namely area of first electrode) of each sub-pixel unit
Being worth range is 0.6%~12%.
When display panel is bent along Y-direction (perpendicular to X-direction), due to first electrode 3 due to size in the X direction compared with
Greatly, suffered bending stress is difficult to discharge, and is easy to produce crackle (shown in Fig. 2), and disconnects the first area 31 and the second area 32；
For first passage 71 since width is smaller, suffered stress is smaller, is easy release, thus is not easy to crack.71 energy of first passage
It is enough electrically connected the first area 31 and the signal end 21 with thin film transistor (TFT), to guarantee that the first area 31 can be received with the second area 32
The signal of thin film transistor (TFT), light-emitting area will not be influenced by crackle, ensure that display panel has sufficiently large light-emitting area,
To extend the service life of display panel.
Fig. 3 shows the first electrode 3A of another embodiment of the application and the top view of signal transmission passage.Described
One electrode includes the first area 31A, the second area 32A, third area 33A and the 4th area 34A.Signal transmission passage includes first passage
71A, second channel 72A, third channel 73A and fourth lane 74A.The first passage 71A is electrically connected the first area 31A and signal
Hold 21A, the second channel 72A to be electrically connected the second area 32A and signal end 21A, third channel 73A be electrically connected third area 33A with
Signal end 21A, fourth lane 74A are electrically connected the 4th area 34A and signal end 21A.Optionally, the first electricity of first passage 71A connection
The first end 35 of pole 3A, second channel connect the second end 36 of first electrode 3A, the third channel 73A connection first electrode
Third end 37, the 4th end 38 of the fourth lane 74A connection first electrode, while first passage 71A and third channel 73A are equal
Second channel 72A is connected, fourth lane connects third channel 73A, that is to say, that four channels are connected in parallel to each other.The first end
35 arrange with second end 36 along Y-direction, and second end 36 arranges in X direction with third end 37, and third end 37 and the 4th end 38 are along the side Y
To arrangement, X-direction and Y-direction are in an angle, and the angle of angle is 90 degree.The structure in each channel is similar, the range of width
It is similarly 2~10mm.Even if oganic light-emitting display device is in X direction or Y-direction bends and splits first electrode 3A generation
Line (shown in Fig. 3), the first area 31A are electrically connected by first passage 71A with signal end 21A, and the second area 32A passes through second channel
72A is electrically connected with signal end 21A, and third area 33A is electrically connected by third channel 73A with signal end 21A, and the 4th area 34A passes through
Fourth lane 74A is electrically connected with signal end 21A, guarantees that each region can receive the signal of thin film transistor (TFT), to ensure that
Enough light-emitting areas.
Please refer to Fig. 3, X-direction and Y-direction may be alternatively provided as out of plumb, and at an acute angle or obtuse angle, to be suitable for difference
The first electrode of shape (such as diamond shape).
Incorporated by reference to Fig. 4, another kind first electrode 3B and signal transmission passage are provided in the present embodiment.The first electrode 3B
Including the first area 311B, the second area 312B, third area 313B, the signal transmission passage includes first passage 71B, second channel
72B and third channel 73B, the first passage 71B be electrically connected the first area 31B and signal end 21B (by second channel 72B and
Third channel 73B bridge joint), the second channel 72B electrical connection third area 31B and signal end 21B, the third channel 73B electricity
The second area 32B and signal end 21B (bridging by second channel 72B) are connected, in the first area 31B, the second area 32B, third area 33B
When being disconnected from each other, the signal end of channel first passage 71B, third channel 73B, second channel 72B connection thin film transistor (TFT) is remained to
21B can receive the signal of thin film transistor (TFT) to make the first area 31B, the second area 32B and third area 33B.In other embodiments
In, to be further ensured that enough light-emitting areas not by main body braking effect, principle is similar with embodiment shown in Fig. 3, increases
Add the access of the signal end of main body and thin film transistor (TFT).
The application also provides a kind of display device comprising the display panel of aforementioned any embodiment, certain display device
It further include the structures such as shell, frame, controller, details are not described herein again.
The application also provides a kind of manufacturing method of display panel comprising:
S1: shown in referring to figure 5., multiple thin film transistor (TFT)s 2 are formed on a flexible substrate 1.
Thin film transistor (TFT) 2 can be formed and depositing on a flexible substrate 1, etching multiple film layers.It is formed by film crystalline substance
Body pipe 2 may include the structures such as grid, source electrode, drain electrode.
S2: incorporated by reference to shown in Fig. 6, first electrode layer is formed on thin film transistor (TFT) 2, makes first electrode layer and film crystal
The signal end 21 of pipe is electrically connected.
S3: incorporated by reference to Fig. 2, by Patternized technique, the first electrode layer is divided into multiple first electrodes, and
Pattern is formed on one electrode and forms the structures such as first electrode and the signal transmission passage.The patterned technique is, for example,
Patterning processes or printing technology etc., coating of the patterning processes for example including photoresist, exposure, development, etching and/or photoresist
The process of removing.
S4: incorporated by reference to Fig. 7, pixel deposition limits material on the first electrode, then limits material by etching the pixel
Expect and form pixel confining layer 4, is formed by the pixel confining layer 4 with multiple pixel openings 41, each pixel openings 41
It is corresponding with a pixel or sub-pixel.First electrode 3 is whole to be exposed by the pixel openings 41, and signal transmission passage is still protected
The pixel confining layer 4 stayed is covered.In other embodiments, signal transmission passage is alternatively chosn to not covered by pixel confining layer
Lid.
S5: incorporated by reference to Fig. 8, luminous organic material is filled in the pixel openings 41, to form organic luminous layer 5.It can
The organic luminous layer 5 is formed by techniques such as vapor deposition, rotary coating, inkjet printing technology, silk-screen printings.Except being filled in pixel
In opening 41, organic luminous layer 5 can be also covered on the partial region of the pixel confining layer 4 of 41 two sides of pixel openings.
In addition to organic luminous layer 5, hole injection layer, hole transmission layer, electron transfer layer, electron injecting layer etc. can also be filled out
It fills in pixel openings 41, which is not described herein again.
S6: incorporated by reference to Fig. 1, second electrode 6 is formed on organic luminous layer 5.Second electrode 6, such as cathode, can not be into
Row patterning, and can be as pantostrat and formed on organic luminous layer 5.
By at least two channels of setting in the application, even if first electrode is because of bending fracture, two channels being capable of electricity
Each region that the signal end first electrode of connection thin film transistor (TFT) is broken apart, improves display while guaranteeing light-emitting area
The service life of panel.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (10)
1. a kind of display panel, it is characterised in that: include:
Flexible base board (1)；
Multiple thin film transistor (TFT)s (2), are formed on the flexible base board (1), and each thin film transistor (TFT) includes signal end
(21)；
Multiple sub-pixel units, each sub-pixel unit include first electrode (3), and each sub-pixel unit is formed in
On one thin film transistor (TFT) (2)；
Multiple signal transmission passages, each signal transmission passage include being electrically connected respectively with the same first electrode (3)
The first passage (71) and second channel (72) connect, and the first passage (71) and second channel (72) respectively with the same institute
State signal end (21) electrical connection.
2. display panel as described in claim 1, it is characterised in that: the first passage (71) is connected to first electrode (3)
First end (35), the second channel (72) is connected to the second end (36) of first electrode (3), the first end and second end
It is arranged along first direction (Y).
3. display panel as claimed in claim 2, it is characterised in that: the first passage (71) connects the second channel
(72), it and by second channel (72) is electrically connected with the second end (36).
4. display panel as described in claim 1, it is characterised in that: the first passage (71) passes through with second channel (72)
Mode in parallel is electrically connected.
5. display panel as described in claim 1, it is characterised in that: the area of the signal transmission passage and each son
The ratio range of the area of pixel unit is 0.6%~12%.
6. display panel as claimed in claim 5, it is characterised in that: the width of the first passage (71) and second channel (72)
Degree range is 2-10um.
7. display panel as claimed in claim 2, it is characterised in that: each signal transmission passage includes third channel
(73A), the first passage (71A), second channel (72A), third channel (73A) are electrically connected same first electricity
Pole (3A) and the same signal end (21A), the third end (37) of third channel (73A) connection first electrode (3), institute
It states second end (36) and third end (37) to arrange in a second direction (X), the first direction (Y) and second direction (X) are in a folder
Angle.
8. display panel as claimed in claim 7, it is characterised in that: the first direction (Y) is perpendicular to second direction (X).
9. display panel as claimed in claim 7, it is characterised in that: each signal transmission passage includes fourth lane
(74A), the first passage (71A), second channel (72A), third channel (73A), fourth lane (74A) are electrically connected together
One first electrode (3A) and the same signal end (21A), the of fourth lane connection first electrode (3A)
Four ends (38), the third end (37) and the 4th end (38) are arranged along first direction (Y).
10. a kind of display device, it is characterised in that: the display device includes as described in any one of preceding claims 1-9
Display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158208.0A CN109326632B (en) | 2018-09-30 | 2018-09-30 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158208.0A CN109326632B (en) | 2018-09-30 | 2018-09-30 | Display panel and display device |
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| Publication Number | Publication Date |
|---|---|
| CN109326632A true CN109326632A (en) | 2019-02-12 |
| CN109326632B CN109326632B (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811158208.0A Active CN109326632B (en) | 2018-09-30 | 2018-09-30 | Display panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111128032A (en) * | 2020-01-19 | 2020-05-08 | 无锡变格新材料科技有限公司 | Display panel, display device, preparation method of display panel and control method of display panel |
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| CN104051470A (en) * | 2013-03-12 | 2014-09-17 | 元太科技工业股份有限公司 | Pixel structure |
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| US20060092360A1 (en) * | 2004-10-29 | 2006-05-04 | Lg. Philips Co., Ltd. | Multi-domain liquid crystal display device and fabrication method thereof |
| CN104051470A (en) * | 2013-03-12 | 2014-09-17 | 元太科技工业股份有限公司 | Pixel structure |
| CN103715229A (en) * | 2013-12-27 | 2014-04-09 | 京东方科技集团股份有限公司 | Array substrate and display device |
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| Publication number | Publication date |
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| CN109326632B (en) | 2020-12-04 |
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