CN109449179A - A kind of passive organic electroluminescent device - Google Patents
A kind of passive organic electroluminescent device Download PDFInfo
- Publication number
- CN109449179A CN109449179A CN201811229722.9A CN201811229722A CN109449179A CN 109449179 A CN109449179 A CN 109449179A CN 201811229722 A CN201811229722 A CN 201811229722A CN 109449179 A CN109449179 A CN 109449179A
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- Prior art keywords
- pixel region
- sub
- organic electroluminescent
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- electroluminescent device
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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
- H10K59/17—Passive-matrix OLED displays
- H10K59/179—Interconnections, e.g. wiring lines or terminals
Abstract
The application discloses a kind of specific structure of passive organic electroluminescent device.The technical program in pixel region by designing conductive connection part and sub-pix, realize the anti-short-circuit effect of device inside, once there is short dot on screen body, the electric current for flowing through short dot is higher, by the conductive connection part fusing in the pixel region of this short dot, only the pixel region fails, and will not bring disaster upon and entirely shield body, compared to existing technologies, it is able to solve the technical issues of causing screen volume defect because of short circuit in the prior art.
Description
Technical field
The present disclosure relates generally to a kind of passive organic electroluminescent devices.
Background technique
OLED (Organic Light Emitting Display) refers to organic semiconducting materials and luminescent material in electricity
Under the driving of field, the phenomenon that injection by carrier with composite guide photoluminescence.Its typical organic electroluminescence device structure is wrapped
It includes organic between first electrode and second electrode that the anode and the cathode as electron injection that are used as hole injection are set
Electroluminescent medium.Its principle is to use ito transparent electrode and metal electrode respectively as the anode and cathode of device, in certain electricity
Under pressure driving, electrons and holes are injected into electron and hole transport layer from cathode and anode respectively, and electrons and holes are passed through respectively
Electron and hole transport layer moves to luminescent layer, and meets in luminescent layer, forms exciton and excites light emitting molecule, Hou Zhejing
Overshoot relaxation and issue visible light.Radiant light can be from ITO unilateral observation to metal electrode film also plays the work in reflecting layer simultaneously
With.Display is made and is referred to as organic light emitting display according to this principle of luminosity, is also OLED display.
Passive drive display of organic electroluminescence (PMOLED) is one kind of OLED device, typical PM-OLED by
Glass substrate, ito anode, organic luminous layer and cathode etc. are formed, wherein thin and transparent ito anode and metallic cathode is such as
With as sandwich organic luminous layer is sandwiched wherein, when the electronics that the hole of voltage injection anode and cathode come is in organic light emission
When layer combines, excites organic material and shine.Typical PMOLED device is driven by row (or column) scanning mode, example
Such as: a PMOLED dot matrix screen has M to arrange (anode), N row (cathode), then the resolution ratio shielded is M*N.Cathode area staggered with anode
As the light emitting region of OLED (can be considered as light emitting diode), only can just shine when a current passes through, moment brightness
It is directly proportional with horizontal scanning line, such as show that the average brightness of picture is 100cd/m2, have 96 horizontal scanning lines, then pixel display brightness must
9600cd/m must be greater than2, while being also contemplated that caused by aperture opening ratio and light polarizing film and losing, pixel intensity requires generally to exist
(2-4)×104cd/m2Between.
The characteristics of PMOLED device is that display pixel single-point brightness is very high, and opposite makes driving current density very
Greatly.Under high current density driving, some potential defects are easy to cause to run down via the driving of high current, and then cause
Shield body failure.The defect that conventional PMOLED device is easy to occur is small dim spot or bright spot of the size in 1um or so.Usually
This defect is to cause positive and negative anodes locally to cause with the presence of leakage current since particle is in anode surface.And high current density or height
Under warm working environment, leakage current caused by this defect can run down, and then cause entire pixel, or even a line of screen body
(or column) fail.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide one kind compared to existing technologies, can solves
The passive organic electroluminescent device for the problem of certainly screen volume defect causes entire pixel or entire row of pixels to fail in the prior art.
In a first aspect, a kind of passive organic electroluminescent device, comprising: carrier substrate, and it is sequentially formed at the load
First electrode layer, insulating layer, luminescent layer and the second electrode lay on structure base board；The first electrode layer is formed in the carrier base
On plate；The insulating layer is formed in the first electrode layer and it isolates pixel region in the first electrode layer；It is single
Conductive connection part is equipped in a pixel region and the conductive connection part is connected to the first electrode layer；The luminescent layer
It is arranged in the pixel region.
According to technical solution provided by the embodiments of the present application, several sub-pixes and described are separated into the pixel region
It is insulated from each other between sub-pix.
According to technical solution provided by the embodiments of the present application, each sub-pix connects at least one conductive connection part.
According to technical solution provided by the embodiments of the present application, the pixel region, sub-pix are rectangular configuration.
According to technical solution provided by the embodiments of the present application, the size range of the pixel region is 100 μm≤[A, B]≤
500μm；30 μm of size≤[a, the b]≤100 μm of the sub-pix.(wherein: A, B is respectively the width and length of pixel region；
A, b is respectively the width and length of sub-pix.)
According to technical solution provided by the embodiments of the present application, the pixel region, sub-pix are square structure, the picture
The size in plain region are as follows: 200 μm and the sub-pix are 50 μm.
According to technical solution provided by the embodiments of the present application, the sub-pix is triangle or polygon.
According to technical solution provided by the embodiments of the present application, the aspect ratio range of the conductive connection part are as follows: 0.1≤L/W
≤10。
According to technical solution provided by the embodiments of the present application, the resistance range of the conductive connection part be more than or equal to
1 Ω and be less than or equal to 1000 Ω.
According to technical solution provided by the embodiments of the present application, further includes: auxiliary electrode layer, the auxiliary electrode layer are formed in
Between the first electrode layer and insulating layer, and it is circumferentially arranged along the pixel region, the auxiliary electrode and the conduction
Interconnecting piece connection.
According to technical solution provided by the embodiments of the present application, the auxiliary electrode layer material is molybdenum aluminium molybdenum or titanium aluminium titanium.
In conclusion the application discloses a kind of specific structure of passive organic electroluminescent device.The technical program is logical
It crosses and designs conductive connection part in pixel region, realize the anti-short circuit design of device inside, once there is short dot on screen body, flow
Electric current through short dot is higher, and the conductive connection part in the pixel region of this short dot is fused, and only the pixel region fails, no
It can bring disaster upon and entirely shield body, compared to existing technologies, be able to solve the skill for causing screen volume defect because of short circuit in the prior art
Art problem.
Further, the structure design of sub-pix is also provided in the optimal technical scheme of the technical program, it may be assumed that described
It is separated into pixel region insulated from each other between several sub-pixes and the sub-pix.This design can make screen body reach fine
Display effect, once there is short dot, pixel region is caused to fail if not dividing to pixel region, shield body on dim spot
It is larger, seriously affect display effect；And pass through after the division of sub-pix, even if there is short dot, it only will cause sub-pix mistake
It imitates, dim spot is smaller on screen body, and the influence to entire pixel is smaller, influences on display effect little.
Further, in the optimal technical scheme of the technical program, further include be formed in it is auxiliary in first electrode layer
Electrode is helped, auxiliary electrode is connected with the conductive connection part, can provide the quick transmission channel of electric current, and it is equal to improve screen body brightness
Even property reduces the voltage of screen body, and then reduces the power consumption of entire OLED.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of vertical view figure structure schematic representation of passive organic electroluminescent device in the prior art；
Fig. 2 be in Fig. 1 A-A to section view figure structure schematic representation；
Fig. 3 is a kind of vertical view figure structure schematic representation (conductive connection part) of passive organic electroluminescent device of the application；
Fig. 4 is a kind of vertical view figure structure schematic representation (sub-pix) of passive organic electroluminescent device of the application；
Fig. 5 is the section view figure structure schematic representation of B-B direction in Fig. 4.
Fig. 6 is vertical view figure structure schematic representation (sub-pix and the conductive company of a kind of passive organic electroluminescent device of the application
Socket part)；
Fig. 7 be in Fig. 6 C-C to section view figure structure schematic representation；
Fig. 8 is that (sub-pix is triangle for the vertical view figure structure schematic representation of passive organic electroluminescent device of the application a kind of
Shape).
Fig. 9 be a kind of passive organic electroluminescent device of the application vertical view figure structure schematic representation (sub-pix be five sides
Shape).
In figure: 1, carrier substrate；2, first electrode layer；3, insulating layer；4, luminescent layer；5, the second electrode lay；6, pixel region
Domain；7, conductive connection part；8, sub-pix；9, auxiliary electrode layer；10, insulated column.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Please refer to Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of passive organic electroluminescent device, comprising: carrier substrate 1, with
And it is sequentially formed at first electrode layer 2, insulating layer 3, luminescent layer 4 and the second electrode lay 5 on the carrier substrate 1；Described
One electrode layer 2 is formed on the carrier substrate 1；The insulating layer 3 is formed in the first electrode layer 2 and it is described
Pixel region 6 is isolated on one electrode layer 2；Conductive connection part 7 and the conductive connection part are equipped in the single pixel region 6
7 are connected to the first electrode layer 2；The luminescent layer 4 is arranged in the pixel region 6.
In above-mentioned technical proposal, carrier substrate 1, basic components are used to form each functional layer thereon, including but not limited to:
First electrode layer, insulating layer, luminescent layer and the second electrode lay.Unmentioned structure belongs to passive organic electroluminescence hair in this programme
The conventional arrangement of optical device, including but not limited to following: encapsulating structure protects OLED to corrode from water oxygen；By the second electrode lay
The insulated column 10 being patterned；The ranks of the driving chip and connection driving chip that show for realizing OLED picture draw
Line, lead can be made of first electrode and/or auxiliary electrode；Flexible printed circuit board (FPC).
The first electrode layer is formed on the carrier substrate；The insulating layer is distributed in the first electrode layer
Above and it isolates pixel region in the first electrode layer.
Compared to existing technologies, conductive connection part is also had additional in this implementation in single pixel region and described is led
Electrical connection section is connected to first electrode layer, based on this design, realizes the anti-short circuit design of device inside, once occur on screen body short
Waypoint, the electric current for flowing through short dot is higher, the conductive connection part in the pixel region of this short dot is fused, only the pixel region
Failure, will not bring disaster upon and entirely shield body, therefore be able to solve the technical issues of causing screen volume defect because of short circuit in the prior art.
In any preferred implementation, it is separated into the pixel region 6 between several sub-pixes 8 and the sub-pix
It is insulated from each other.
Fig. 4 and Fig. 5 are please referred to, based on this design, is also provided with sub-pix in the optimal technical scheme of the technical program
Structure design, it may be assumed that be separated into the pixel region insulated from each other between several sub-pixes and the sub-pix.This design
Screen body can be made to reach good display effect, if not dividing to pixel region, once there is short dot, cause entire picture
Plain area failures, shield body on dim spot it is larger, seriously affect display effect；And pass through after the division of sub-pix, even if occurring short
Waypoint only will cause sub-pix failure, and dim spot is smaller on screen body, influences on display effect little.
In any preferred implementation, each sub-pix connects at least one conductive connection part.
It please refers to Fig. 6 and Fig. 7, in the present embodiment, the design of conductive connection part is applied in the region of sub-pix, so as to
In adequately being protected to sub-pix, short circuit is prevented to greatest extent.
In any preferred implementation, the pixel region, sub-pix are rectangular configuration.
Particularly, the size range of the pixel region be 100 μm≤[A, B]≤500 μm；The size 30 of the sub-pix
μm≤[a,b]≤100μm.(wherein: A, B is respectively the width and length of pixel region；A, b be respectively sub-pix width and
Length.)
Subpixel size is excessive, then does not have an effect of partitioning pixel regions, the indicated range that short dot is formed still compared with
Greatly；And subpixel size is too small, then is easy to influence the aperture opening ratio of device, gives pixel region and subpixel regions in this design
Reference dimension.Specific implementation is see, for example under:
Embodiment one: A=B=100 μm of the pixel, a=b=30 μm of the sub-pix.
Embodiment two: A=B=500 μm of the pixel, a=b=100 μm of the sub-pix
Embodiment three: A=B=300 μm of the pixel, a=b=60 μm of the sub-pix
Example IV: A=B=300 μm of the pixel, a=b=70 μm of the sub-pix
Embodiment five: A=B=300 μm of the pixel, a=b=65 μm of the sub-pix
Embodiment six: B=500 μm of A=100 μm of the pixel,
B=60 μm of a=30 μm of the sub-pix.
Embodiment seven: B=500 μm of A=300 μm of the pixel,
B=100 μm of a=30 μm of the sub-pix.
It should be noted that embodiment one to seven is only preferred embodiment, the protection scope of the technical program is answered unlimited
It is enumerated in above-mentioned.
In any preferred implementation, the pixel region, sub-pix are square structure, the size of the pixel region
Are as follows: 200 μm and the sub-pix are 50 μm.
Fig. 8 and Fig. 9 are please referred to, in any preferred implementation, the sub-pix is triangle or polygon.Based on this
The design of shape in embodiment, can be on the basis of being separated pixel region, the preferable aperture opening ratio of retainer member.
In any preferred implementation, the aspect ratio range of the conductive connection part are as follows: 0.1≤L/W≤10.
Based on this design, when short circuit occurs in organic luminescent device, the electric current for flowing through short-circuit pixel is higher, leads to short circuit even
The current density connect at device is very big, and heat is gathered in Elecrical connector in a short time, and then short circuit connector is caused to blow.
In any preferred implementation, the resistance range of the conductive connection part is more than or equal to 1 Ω and to be less than etc.
In 1000 Ω.
If the resistance very little of Elecrical connector, the heat very little accumulated at Elecrical connector, Elecrical connector hardly possible
With fusing；If Elecrical connector resistance is very high, the ratio of L/W will definitely increase.It (is conductively connected under conditions of technique is certain
The line width W of device is certain), then to increase the length of L, the aperture opening ratio of device is caused to decline.
If the design to be applied to the structure of PMOLED, in any preferred implementation, further includes: auxiliary electrode layer 9,
The auxiliary electrode layer is formed between the first electrode layer and insulating layer, and it is circumferentially arranged along the pixel region, institute
Auxiliary electrode is stated to be connected to the conductive connection part.
Based on this design, auxiliary electrode is connected with the conductive connection part, can provide the quick transmission channel of electric current, change
Kind screen body brightness uniformity, reduces the voltage of screen body, and then reduce the power consumption of entire OLED.
Preferably, the auxiliary electrode layer material is molybdenum aluminium molybdenum or titanium aluminium titanium.
Comparative example:
Fig. 1 and Fig. 2 are please referred to, in the comparative example, pixel region, which is not separated, to be divided, and does not design conductive connection part,
In the specific use process, it is easy to appear circuit defect and entire pixel region is caused to fail.
The present embodiment:
Fig. 6 and Fig. 7 are please referred to, in this embodiment, pixel region is separated into sub-pix, and insulate between sub-pix,
Even if circuit defect occurs, the electric current for flowing through short dot is higher, and the conductive connection part in the pixel region of this short dot is fused,
It is only the single sub-pix failure in pixel region, it is smaller to device entire effect.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of passive organic electroluminescent device, it is characterised in that: include: carrier substrate, and be sequentially formed at the load
First electrode layer, insulating layer, luminescent layer and the second electrode lay on structure base board；The first electrode layer is formed in the carrier base
On plate；The insulating layer is formed in the first electrode layer and it isolates pixel region in the first electrode layer；It is single
Conductive connection part is equipped in a pixel region and the conductive connection part is connected to the first electrode layer；The luminescent layer
It is arranged in the pixel region.
2. a kind of passive organic electroluminescent device according to claim 1, it is characterised in that: quilt in the pixel region
It is divided into insulated from each other between several sub-pixes and the sub-pix.
3. a kind of passive organic electroluminescent device according to claim 2, it is characterised in that: each sub-pix connects
Connect at least one conductive connection part.
4. a kind of passive organic electroluminescent device according to claim 2, it is characterised in that: the pixel region, Asia
Pixel is rectangular configuration.
5. a kind of passive organic electroluminescent device according to claim 4, it is characterised in that: the ruler of the pixel region
Very little range be 100 μm≤[A, B]≤500 μm；30 μm of size≤[a, the b]≤100 μm of the sub-pix.(wherein: A, B distinguishes
For the width and length of pixel region；A, b is respectively the width and length of sub-pix.)
6. a kind of passive organic electroluminescent device according to claim 5, it is characterised in that: the pixel region, Asia
Pixel is square structure, the size of the pixel region are as follows: 200 μm and the sub-pix are 50 μm.
7. a kind of passive organic electroluminescent device according to claim 2, it is characterised in that: the sub-pix is triangle
Shape or polygon.
8. a kind of passive organic electroluminescent device according to any one of claims 1 to 7, it is characterised in that: described to lead
The aspect ratio range of electrical connection section are as follows: 0.1≤L/W≤10.
9. a kind of passive organic electroluminescent device according to any one of claims 1 to 7, it is characterised in that: described to lead
The resistance range of electrical connection section is more than or equal to 1 Ω and to be less than or equal to 1000 Ω.
10. a kind of passive organic electroluminescent device according to any one of claims 1 to 7, it is characterised in that: also wrap
Include: auxiliary electrode layer, the auxiliary electrode layer are formed between the first electrode layer and insulating layer, and it is along the pixel region
Domain is circumferentially arranged, and the auxiliary electrode is connected to the conductive connection part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229722.9A CN109449179A (en) | 2018-10-22 | 2018-10-22 | A kind of passive organic electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229722.9A CN109449179A (en) | 2018-10-22 | 2018-10-22 | A kind of passive organic electroluminescent device |
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| Publication Number | Publication Date |
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| CN109449179A true CN109449179A (en) | 2019-03-08 |
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ID=65546930
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| CN201811229722.9A Pending CN109449179A (en) | 2018-10-22 | 2018-10-22 | A kind of passive organic electroluminescent device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1358298A (en) * | 2000-01-25 | 2002-07-10 | 皇家菲利浦电子有限公司 | Electroluminescent element |
| CN106463645A (en) * | 2014-05-12 | 2017-02-22 | 乐金显示有限公司 | Organic light-emitting device and method for preparing same |
| CN106463646A (en) * | 2014-05-12 | 2017-02-22 | 乐金显示有限公司 | Organic light-emitting element |
| CN206194793U (en) * | 2016-12-01 | 2017-05-24 | 京东方科技集团股份有限公司 | Luminous type OLED display device in top |
-
2018
- 2018-10-22 CN CN201811229722.9A patent/CN109449179A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1358298A (en) * | 2000-01-25 | 2002-07-10 | 皇家菲利浦电子有限公司 | Electroluminescent element |
| CN106463645A (en) * | 2014-05-12 | 2017-02-22 | 乐金显示有限公司 | Organic light-emitting device and method for preparing same |
| CN106463646A (en) * | 2014-05-12 | 2017-02-22 | 乐金显示有限公司 | Organic light-emitting element |
| CN206194793U (en) * | 2016-12-01 | 2017-05-24 | 京东方科技集团股份有限公司 | Luminous type OLED display device in top |
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Application publication date: 20190308 |
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