CN1822737A - Organic electroluminescence display and its producing method - Google Patents
Organic electroluminescence display and its producing method Download PDFInfo
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- CN1822737A CN1822737A CN 200610034435 CN200610034435A CN1822737A CN 1822737 A CN1822737 A CN 1822737A CN 200610034435 CN200610034435 CN 200610034435 CN 200610034435 A CN200610034435 A CN 200610034435A CN 1822737 A CN1822737 A CN 1822737A
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Abstract
Said invention discloses organic electroluminescent display and manufacture method. It contains applying forward voltage (current pulse), reverse voltage pulse or both of them between anode and cathode of display device before packaging organic electroluminescent display device or in aging, partial short circuit fault instant burning-out or partial diode characteristic broken down instead of presenting short circuit phenomena and to make unstabilized short circuit fault speeding up representation for taking out as unqualified product. Said invented method can effectively inspect even eliminate short circuit fault before bonding electroluminescent display device and integrated circuit driving chip, raising non-defective rate and greatly reducing production costs.
Description
Technical field
The present invention relates to a kind of display of organic electroluminescence and preparation method thereof, relate in particular to the method for checking even eliminate the aging inspection of the anodic-cathodic circuit defect in the organic elctroluminescent device in the display of organic electroluminescence manufacturing process.
Background technology
Since the people such as C.W.TANG of U.S. KODAK company in 1987 have issued a kind of low voltage drive, luminous efficiency height, organic elctroluminescent device (Organic Electroluminescent Devices that luminosity is high, be called for short the OLED device), the research work of organic elctroluminescent device has obtained breakthrough progress.Through nearly 20 years research and development, the organic elctroluminescent device technology has obtained significant progress, along with the continuous maturation of technology such as equipment, material, technology, organic elctroluminescent device has been realized industrialization, and is increasing with very fast speed.The structure of organic elctroluminescent device is to clip multilayer organic or inorganic film functional layer between anode and negative electrode, overall film thickness is about 50～500 nanometers, in device manufacturing processes, the pollution that is brought by environment, people, material or equipment is inevitable, therefore, cause the device inside defective also to be difficult to avoid by small impurity, and impurities such as tiny dust are clipped between the anodic-cathodic or there is pin hole in film, as easy as rolling off a logly cause the short circuit of organic elctroluminescent device anodic-cathodic or unstable short circuit or potential short circuit.Anodic-cathodic short circuit how to check out or eliminate the organic elctroluminescent device existence is a problem that makes the headache of numerous producers, because if before integrated circuit chip for driving nation is fixed, will not exist the device of anodic-cathodic short circuit to check out, allow it flow to next operation, to have a strong impact on the yields of subsequent handling, cause a large amount of integrated circuit chip for driving wastes.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of manufacture method of display of organic electroluminescence, can check even eliminate the circuit defect between the organic elctroluminescent device anodic-cathodic before organic elctroluminescent device and integrated circuit chip for driving nation are fixed effectively.
The present invention adopts following technical scheme: a kind of manufacture method of display of organic electroluminescence, this method comprises the steps:
(1) on substrate, makes anode, functional layer and negative electrode;
(2) bonnet and aforesaid substrate are encapsulated;
(3) choose to the inspection of wearing out of above-mentioned packaged organic elctroluminescent device, and with defective item;
(4) will become the ORGANIC ELECTROLUMINESCENCE DISPLAYS module surely through the display device and the integrated circuit chip for driving nation of overaging inspection;
(5) above-mentioned ORGANIC ELECTROLUMINESCENCE DISPLAYS module is carried out the module group aging inspection, again defective item is chosen;
Special feature of the present invention is: before above-mentioned steps (2) encapsulates bonnet (5) and substrate (1) or in the aging inspection of step (3), make the partial short circuit defective breakdown and no longer show short circuit phenomenon and make and quicken under the impact of unsettled circuit defect in pulse to show and chosen as defective item by scorification or local diode characteristic in moment by applying the curtage pulse between the anodic-cathodic to described organic elctroluminescent device.
Describedly between the anodic-cathodic of organic elctroluminescent device, apply the curtage pulse and be meant and apply direct impulse or reverse impulse or both combinations.
Described curtage pulse can have multiple compound mode:
One, described direct impulse can be single direct impulse, and also the compound direct impulse that can be made up of a plurality of different direct impulses also can be forward constant voltage or electric current.
Two, described reverse impulse can be single reverse impulse, also can be formed compound reverse impulse by a plurality of different reverse impulses, also can be reverse constant voltage.
Three, the combination of described direct impulse and reverse impulse can be the combination of single direct impulse and single reverse impulse; It also can be the combination of single direct impulse and compound reverse impulse; It also can be the combination of single reverse impulse and compound direct impulse; It also can be the combination of compound direct impulse and compound reverse impulse; It also can be the combination of forward constant voltage or electric current and single reverse impulse; It also can be the combination of forward constant voltage or electric current and compound reverse impulse; Also can be forward constant voltage or electric current and the oppositely combination of constant voltage; It also can be the combination of reverse constant voltage and single direct impulse; It also can be the combination of reverse constant voltage and compound direct impulse;
The combination of above-mentioned direct impulse and reverse impulse, its combination number of times can be once, also can be repeatedly, and built-up sequence can be direct impulse preceding, also can be that reverse impulse is preceding; The different direct impulses and the combination of reverse impulse can be made up once more, and its combination number of times can be once also can be repeatedly, and built-up sequence without limits.
The forward voltage scope of described curtage pulse is 0 to 20 volt, and the forward current density scope is 0 to 500mA/cm
2, reverse voltage range is-50 to 0 volts, pulse width range is 20 μ s to 20hrs.
The display of organic electroluminescence that utilizes the inventive method to produce comprises: be encapsulated in anode, functional layer and the negative electrode in the airtight chamber that is surrounded by substrate and bonnet and be connected integrated circuit chip for driving between described anode and the negative electrode, described functional layer comprises a luminescent layer at least; Conductive bumps on the described male or female, and the tiny dust that exists between anode and the negative electrode, or the existing pin hole of functional layer, by being applied to the curtage pulse between described anode and the negative electrode and by the moment scorification or thereby its local diode characteristic is breakdown eliminates the short circuit mechanism that it may occur, and make unsettled circuit defect under the impact of pulse, quicken to show and chosen as defective item.
Described anode is positioned on the substrate, and functional layer is positioned on the anode, and negative electrode is positioned on the functional layer; Perhaps, described negative electrode is positioned on the substrate, and functional layer is positioned on the negative electrode, and anode is positioned on the functional layer.
Compare with prior art, the manufacture method of display of organic electroluminescence of the present invention has following advantage: when having the impurity may cause short circuit or film pin hole between anodic-cathodic, the partial short circuit defective is breakdown and no longer show short circuit phenomenon by scorification or local diode characteristic in moment, and other tangible or unsettled circuit defects that cause by impurity, under the impact of pulse, thereby the acceleration performance is used as defective products and chooses, can avoid existing the product of anodic-cathodic short circuit mechanism to flow to the integrated circuit chip for driving nation position of determining a post thus effectively, when avoiding the waste of integrated circuit chip for driving, improved the yields that display of organic electroluminescence is made, thereby obviously reduced production costs.
Description of drawings
Fig. 1 is the basic structure schematic diagram of organic elctroluminescent device of the present invention;
Fig. 2 is the trace-diagram of organic elctroluminescent device anodic-cathodic;
Fig. 3 is the fundamental diagram of organic elctroluminescent device;
Fig. 4 is the schematic diagram when being short-circuited phenomenon between the anodic-cathodic of organic elctroluminescent device;
The described direct impulse oscillogram of Fig. 5 for organic elctroluminescent device is applied;
The described reverse impulse oscillogram of Fig. 6 for organic elctroluminescent device is applied;
Described forward constant voltage or the current waveform figure of Fig. 7 for organic elctroluminescent device is applied;
The described reverse constant voltage oscillogram of Fig. 8 for organic elctroluminescent device is applied;
Fig. 9 adds the oscillogram of reverse impulse mode one for the described direct impulse that organic elctroluminescent device is applied;
Figure 10 adds the oscillogram of reverse impulse mode two for the described direct impulse that organic elctroluminescent device is applied;
Figure 11 adds the oscillogram of reverse impulse mode three for the described direct impulse that organic elctroluminescent device is applied;
Figure 12 adds the oscillogram of reverse impulse mode four for the described direct impulse that organic elctroluminescent device is applied.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
The basic structure of organic elctroluminescent device of the present invention as shown in Figure 1, be followed successively by substrate 1, anode 2, organic or inorganic functional layer 3, negative electrode 4 and bonnet 5 from front to back, described organic or inorganic functional layer 3 includes, but is not limited to hole injection layer 31, hole transmission layer 32, luminescent layer 33, electron transfer layer 34 and electron injecting layer 35.The order of above-mentioned functions layer 3 each layer also can be inverted, and negative electrode 4 is produced on the substrate 1.
Described substrate 1 is generally selected glass substrate or plastic base for use as the supporter of organic electroluminescence device, and glass substrate can adopt calcium soda-lime glass or Pyrex, and plastic base can adopt the material of polyester or polyimides compounds.Anode 2 is a transparency electrode, be produced on the substrate, can adopt inorganic material or conductive polymer material, inorganic material is generally indium tin oxide (ITO) or indium-zinc oxide (IZO), perhaps adopt gold, copper, the metal that work functions such as silver are high, conductive polymer material is generally by poly-(3 methyl thiophene), polypyrrole, electroconductive polymers such as polyaniline constitute, in addition, general, in order to reduce the face resistance of device, can adopt resistivity than the metal of low at least one the order of magnitude of transparency electrode as auxiliary electrode, such as chromium, silver, molybdenum etc., the thickness of anode 2 is comprehensively determined by transmitance and resistivity, is generally 50～500nm.Hole injection layer 31 normal CuPc (CuPc), the mTDATA (4 of adopting in the organic function layer 3,4 '; 4 "-three { N-(3-aminomethyl phenyl)-N-phenyl amino } triphenylamine) or TDATA (4,4 '; 4 "-three { N, the N-diphenyl amino } triphenylamine) etc. material, general thickness is 5～300nm.Hole transmission layer 32 can adopt TPD (N, N '-diphenyl-N, N '-two (3-aminomethyl phenyl)-1,1 '-xenyl-4,4 '-diamines) or aromatic diamine based compound NPD such as 1,1 '-two (4-di-p-tolyl aminophenyl) cyclohexane etc., general thickness is at 2～150nm.The material of luminescent layer 33 is determined by glow color, generally is that the higher guest materials of a small amount of luminous efficiency of doping constitutes in material of main part, and the object doping ratio is generally between 0～30%.Electron transfer layer 34 adopts the material that electron affinity is big, electron mobility is big, as Alq3 (oxine aluminium).Between electron transfer layer 34 and negative electrode 4, make one deck electron injecting layer 35, it not only can be so that electronics be more prone to inject, can also improve the adhesiveness of electron transfer layer 34, and can reduce driving voltage, improve luminous efficiency and prolong device lifetime etc., the inorganic material that general employing itself is an insulator is as electron injecting layer, such as: the LiF (lithium fluoride) that adopts with the present invention is the alkali metal fluoride of representative etc., its thickness generally is controlled between 0.5～2nm, because thickness is very thin, electronics is easy to pass this layer with tunneling effect.Described negative electrode generally adopts the metal or metal alloy material of low work function to make, as: aluminium, aluminium lithium alloy, magnesium silver alloy etc., its thickness is between 30～300nm.
The cabling of organic elctroluminescent device anodic-cathodic as shown in Figure 2, negative electrode cabling 4 along continuous straight runs lead to the terminal pin zone from the right and left, anode 2 vertically leads to terminal pin zone 8 downwards, and terminal pin zone 8 is exposed circuit with the integrated circuit chip for driving and carried out nation's phasing and connect.When the current potential that imposes on anode 2 is higher than the current potential of negative electrode 4, be referred to as to apply forward voltage, otherwise, then for applying reverse voltage.
When between the anode 2 of organic elctroluminescent device and negative electrode 4, applying suitable forward voltage, flow to luminescent layer 33 through hole injection layer 31, hole transmission layer 32 from anode 2 in the hole, electronics flows to luminescent layer 33 through electron injecting layer 35, electron transfer layer 34 from negative electrode 4, finally, hole and electronics are compound and luminous at luminescent layer 33.Shown in Fig. 3 a, the operation principle of organic electroluminescence device is equivalent to diode, and forward conduction oppositely ends.Shown in Fig. 3 b, its forward voltage is big more, and electric current is also big more, and luminous intensity is strong more; And when applying reverse voltage, reverse current is very little, and when reverse voltage increased gradually, reverse current remained unchanged substantially, had only when reverse voltage is increased to a certain numerical value, and reverse current just can sharply increase, breakdown diode.
Because the about 50～500nm of very thin thickness of the organic or inorganic film between the anodic-cathodic of organic electroluminescence device, in manufacturing process even very small dust, there are short circuit phenomenon or defectives such as unstable short circuit or potential short circuit between the anodic-cathodic that the film pin hole all might cause in impurities such as impurity or the coating process, the manufacture method of display of organic electroluminescence of the present invention be combined with organic electroluminescence devices drive principle characteristics and propose, can effectively eliminate the electric pole short circuit defective or allow it show and it is chosen, it comprises the steps:
(1) makes anode 2, functional layer 3 and negative electrode 4 on the substrate 1 successively.At first the mode by sputter is coated on formation anode 2 on the substrate 1 equably with anode material; The substrate 1 that will be coated with anode material again cleans up, and produces needed anode pattern and insulating barrier, insulated column etc. through photoetching process, and this section flow process is referred to as design producing; On the anode pattern of making, to make each layer organic or inorganic functional layer 3 layer by layer, organic or inorganic functional layer 3 comprises hole injection layer 31, hole transmission layer 32, luminescent layer 33, electron transfer layer 34 and electron injecting layer 35, and organic or inorganic functional layer 3 mainly forms by methods such as vacuum vapour deposition, spin-coating method or chemical vapour deposition techniques; Make negative electrode 4 at last on electron injecting layer 35, negative electrode 4 also is that the mode by vacuum evaporation deposits and forms.
(2) bonnet 5 and aforesaid substrate 1 are carried out the plated film encapsulation being full of under the environment of nitrogen, prevent oxygen in the atmosphere and steam destruction to organic material, as shown in Figure 1, during encapsulation, in the groove of bonnet 5 inner faces, fill out drier 6, prevent the destruction that steam causes organic material.Adopt epoxy resin edge sealing adhesive 7 to encapsulate bonnet 5 and substrate 1 again.
(3) choose to the inspection of wearing out of above-mentioned packaged organic elctroluminescent device, and with defective item.Except normal heat ageing, electricity is aging or heat powers up the aging technique, also makes the partial short circuit defective breakdown and no longer show short circuit phenomenon and make and quicken under the impact of unsettled circuit defect in pulse to show and chosen as defective item by scorification or local diode characteristic in moment applying bigger curtage pulse between the anodic-cathodic of organic elctroluminescent device.
(4) will become the ORGANIC ELECTROLUMINESCENCE DISPLAYS module surely through the display device and the integrated circuit chip for driving nation of overaging inspection; The fixed mode of nation mainly contains COG (chip on glass, nation fixes on glass with the integrated circuit chip for driving), TAB (Tape Automated Bonding, anisotropy conductiving glue connects) and COF (chip onfilm, nation fixes on the film with the integrated circuit chip for driving) etc.
(5) before shipment, also to carry out the module group aging inspection to above-mentioned ORGANIC ELECTROLUMINESCENCE DISPLAYS module, again defective item is chosen.
Above-mentionedly both can in the aging inspection of step (3), implement applying the curtage pulse between the anodic-cathodic of organic elctroluminescent device, also can be after the organic elctroluminescent device anodic-cathodic be made, implement before bonnet 5 and substrate 1 encapsulation.The described curtage pulse that applies between the anodic-cathodic to organic electroluminescence device is meant direct impulse, reverse impulse or both combinations, the forward voltage scope that drives the simple grain organic elctroluminescent device is 0～20V, the forward current density scope is 0～500mA/cm2, reverse voltage range is-50～0V, and pulse width range is 20 μ s～20hrs).
Described impulse waveform can have a variety of forms, and wherein: described direct impulse can be single direct impulse, and also the compound direct impulse that can be made up of a plurality of different direct impulses also can be forward constant voltage or electric current; Described reverse impulse can be single reverse impulse, also can be formed compound reverse impulse by a plurality of different reverse impulses, also can be reverse constant voltage; The combination of described direct impulse and reverse impulse, it can be the combination of single direct impulse and single reverse impulse, it also can be the combination of single direct impulse and compound reverse impulse, it also can be the combination of single reverse impulse and compound direct impulse, it also can be the combination of compound direct impulse and compound reverse impulse, it also can be the combination of forward constant voltage or electric current and single reverse impulse, it also can be the combination of forward constant voltage or electric current and compound reverse impulse, also can be forward constant voltage or electric current and the oppositely combination of constant voltage, also can be the combination of reverse constant voltage and single direct impulse, also can be the combination of reverse constant voltage and compound direct impulse; The combination of direct impulse and reverse impulse, its combination number of times can be once, also can be repeatedly, and built-up sequence can be direct impulse preceding, also can be that reverse impulse is preceding; The different direct impulses and the combination of reverse impulse can be made up once more, and its combination number of times can be once also can be repeatedly, and built-up sequence without limits.
Shown in Fig. 5 to 12, be the wherein several waveforms that derive from by direct impulse waveform and reverse impulse waveform and the form of combination thereof: 1) forward constant voltage or electric current; 2) reverse constant voltage; 3) direct impulse adds reverse impulse etc.Different waveforms or combination are different to the influence of device.Find in the test that the effect that the utilization direct impulse adds this pulse combined of reverse impulse is optimized.Various waveforms are carried out order transposing combination also can reach similar effect, but be not quite similar.And make up number of times and do not limit, the various combinations of deriving from can be made up once more, have not just enumerated one by one at this.Be not only the compound mode that changes driving pulse, change the amplitude and the time of pulse, the circuit defect between the organic electroluminescence device anodic-cathodic also can effectively be checked even eliminate to the frequency of change pulse and width etc.Owing to there be the impurity or the film pin hole that may cause short circuit between anodic-cathodic, when applying direct impulse or reverse impulse waveform, the forward current reverse current very big or moment of moment between this place's anodic-cathodic is very big, the partial short circuit defective is breakdown and no longer show short circuit phenomenon by scorification or local diode characteristic in moment, and some tangible or unsettled circuit defects that cause by impurity, under the impact of pulse, quicken to show.
Following examples are finished design producing and plated film encapsulation with identical technology, check that aging the post applies different impulse waveforms respectively device is worn out, check out the anodic-cathodic short circuit, eliminate the partial short circuit defective, and the effect after relatively its integrated circuit chip for driving nation decides:
Embodiment one, employing forward constant current mode wear out: applied forward current in continuous 30 minutes, its current density is 2.5mA/cm2.
Produce 96 of organic electroluminescence devices.After adopting forward current aging, check out 6 of anodic-cathodic circuit defects, ratio accounts for 6.25%.Add integrated circuit chip for driving nation and make 24 modules, check out 12 anodic-cathodic short circuits in the module group aging process, ratio accounts for 50%.
Embodiment two, employing direct impulse add the reverse impulse compound mode and wear out: 15.6ms applies the forward current that current density is 160mA/cm2 continuously, and 984.4ms applies reverse voltage-20V continuously again, and frequency is 1Hz, 30 minutes altogether.
Produce 144 of organic electroluminescence devices.After adopting pulse combined aging, check out 11 of anodic-cathodic circuit defects, ratio accounts for 7.64%.Add integrated circuit chip for driving nation and make 27 modules, check out 1 anodic-cathodic short circuit in the module group aging process, ratio accounts for 3.7%.
Embodiment three, adopt forward constant current mode aging: to apply the forward current that current density is 2.5mA/cm2 in continuous 4 hours.
Produce 432 of organic electroluminescence devices.In the ageing process, occur 32 circuit defects altogether, wherein one is eliminated, and elimination factor accounts for 3.1% of circuit defect, and remaining 31 circuit defects show, and the ratio that accounts for sum is 7.18%.Add integrated circuit chip for driving nation and make 344 modules, check out 144 anodic-cathodic circuit defects in the module group aging process, ratio accounts for 41.86%.Generally speaking, anodic-cathodic poor short circuit rate account for the sum ratio be 40.51%.
Embodiment four, employing direct impulse add the reverse impulse compound mode and wear out:
A. applied the forward constant current that current density is 2.5mA/cm2 in continuous 20 minutes;
B. applied reverse constant voltage-20V in continuous again 30 minutes;
C. applied the forward constant current that current density is 2.5mA/cm2 in continuous 20 minutes;
D. 15.6ms applies the forward constant current that current density is 160mA/cm2 continuously, and 984.4ms applies reverse voltage-20V continuously again, and frequency is 1Hz, totally 30 minutes;
E. applied the forward constant current that current density is 2.5mA/cm2 in continuous 20 minutes;
F. repeat above-mentioned steps A to E.
Produce 432 of organic electroluminescence devices.In the ageing process, occur 59 circuit defects altogether, wherein 13 are eliminated, and elimination factor accounts for 22% of circuit defect, and remaining 46 circuit defects show, and the ratio that accounts for sum is 10.65%.Add integrated circuit chip for driving nation and make 325 modules, check out 14 anodic-cathodic circuit defects in the module group aging process, ratio accounts for 4.31%.Generally speaking, anodic-cathodic poor short circuit rate account for the sum ratio be 13.89%.
Embodiment five, adopt reverse constant voltage mode aging: to apply reverse voltage-20V in continuous 4 hours.
Produce 480 of organic electroluminescence devices.After aging, occur 139 circuit defects altogether, the ratio that accounts for sum is 28.96%.Add integrated circuit chip for driving nation and make 311 modules, check out 18 anodic-cathodic circuit defects in the module group aging process, ratio accounts for 5.79%.Generally speaking, anodic-cathodic poor short circuit rate account for the sum ratio be 32.7%.
Embodiment six, employing direct impulse add the reverse impulse compound mode and wear out:
A. applied the forward current that current density is 2.5mA/cm2 in continuous 20 minutes;
B. applied reverse voltage-20V in continuous 30 minutes;
C. applied the forward current that current density is 2.5mA/cm2 in continuous 20 minutes;
D. 15.6ms applies the forward current that current density is 160mA/cm2 continuously, and 984.4ms applies reverse voltage-20V continuously again, and frequency is 1Hz, 30 minutes altogether;
E. applied the forward current that current density is 2.5mA/cm2 in continuous 20 minutes;
F. repeat above-mentioned steps A to E.
Produce 480 of organic electroluminescence devices.In the ageing process, occur 71 circuit defects altogether, wherein 14 are eliminated, and elimination factor accounts for 19.72% of circuit defect, and remaining 57 circuit defects show, and the ratio that accounts for sum is 11.88%.Add integrated circuit chip for driving nation and make 378 modules, check out 14 anodic-cathodic circuit defects in the module group aging process, ratio accounts for 3.70%.Generally speaking, anodic-cathodic poor short circuit rate account for the sum ratio be 14.79%.
As can be seen from the above embodiments, adopting direct impulse to add the reverse impulse compound mode comes organic electroluminescence device is worn out, in the identical time, can allow more circuit defect show, simultaneously can eliminate the partial short circuit defective, improve the device yields, and the anodic-cathodic circuit defect ratio after control integrated circuit chip for driving nation decides more effectively.
The present invention is applicable to all display of organic electroluminescence, is particularly useful for micromolecule display of organic electroluminescence and polymer organic electroluminescence display.
Claims (17)
1, a kind of manufacture method of display of organic electroluminescence, this method comprises the steps:
(1) goes up making anode (2), functional layer (3) and negative electrode (4) at substrate (1);
(2) bonnet (5) and aforesaid substrate (1) are encapsulated;
(3) choose to the inspection of wearing out of above-mentioned packaged organic elctroluminescent device, and with defective item;
(4) will become the ORGANIC ELECTROLUMINESCENCE DISPLAYS module surely through the display device and the integrated circuit chip for driving nation of overaging inspection;
(5) above-mentioned ORGANIC ELECTROLUMINESCENCE DISPLAYS module is carried out the module group aging inspection, again defective item is chosen;
It is characterized in that: before above-mentioned steps (2) encapsulates bonnet (5) and substrate (1) or in the aging inspection of step (3), by applying the curtage pulse between the anodic-cathodic to described organic elctroluminescent device, thereby make the partial short circuit defective breakdown and no longer show short circuit phenomenon and make and quicken to show under the impact of unsettled circuit defect in pulse to be chosen by scorification or local diode characteristic as defective item in moment.
2, the manufacture method of display of organic electroluminescence according to claim 1 is characterized in that: the described curtage pulse that applies between the anodic-cathodic of organic elctroluminescent device is meant and applies direct impulse or reverse impulse or both combinations.
3, the manufacture method of display of organic electroluminescence according to claim 2, it is characterized in that: described direct impulse can be single direct impulse, also the compound direct impulse that can be made up of a plurality of different direct impulses also can be forward constant voltage or electric current.
4, the manufacture method of display of organic electroluminescence according to claim 2, it is characterized in that: reverse impulse can be single reverse impulse, also can be formed compound reverse impulse by a plurality of different reverse impulses, also can be reverse constant voltage.
5, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of single direct impulse and single reverse impulse.
6, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of single direct impulse and compound reverse impulse.
7, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of single reverse impulse and compound direct impulse.
8, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of compound direct impulse and compound reverse impulse.
9, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of forward constant voltage or electric current and single reverse impulse.
10, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of forward constant voltage or electric current and compound reverse impulse.
11, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be forward constant voltage or electric current and the oppositely combination of constant voltage.
12, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of reverse constant voltage and single direct impulse.
13, the manufacture method of display of organic electroluminescence according to claim 2 is characterized in that: the combination of described direct impulse and reverse impulse can be the combination of reverse constant voltage and compound direct impulse.
14, according to the manufacture method of each described display of organic electroluminescence of claim 5 to 13, it is characterized in that: the combination of described direct impulse and reverse impulse, its combination number of times can be once, also can be repeatedly, and built-up sequence can be direct impulse preceding, also can be that reverse impulse is preceding; The different direct impulses and the combination of reverse impulse can be made up once more, and its combination number of times can be once also can be repeatedly, and built-up sequence without limits.
15, according to the manufacture method of each described display of organic electroluminescence of claim 1 to 13, it is characterized in that: the forward voltage scope of described curtage pulse is 0 to 20 volt, and the forward current density scope is 0 to 500mA/cm
2, reverse voltage range is-50 to 0 volts, pulse width range is 20 μ s to 20hrs.
16, a kind of display of organic electroluminescence, comprise anode (2), functional layer (3) and the negative electrode (4) that is encapsulated in the airtight chamber that surrounds by substrate (1) and bonnet (8) and be connected described anode (2) and negative electrode (4) between the integrated circuit chip for driving, described functional layer (3) comprises a luminescent layer (33) at least; It is characterized in that: the conductive bumps on described anode (2) or the negative electrode (4), and the tiny dust that exists between anode and the negative electrode, or the existing pin hole of functional layer (3), by being applied to described anode (2) and negative electrode (4) thus between the curtage pulse and eliminated the short circuit mechanism that it may occur by moment scorification or its local diode characteristic are breakdown, perhaps quicken its circuit defect and show.
17, display of organic electroluminescence according to claim 11 is characterized in that: described anode (2) is positioned on the substrate (1), and functional layer (3) is positioned on the anode (2), and negative electrode (4) is positioned on the functional layer (3); Perhaps, described negative electrode (4) is positioned on the substrate (1), and functional layer (3) is positioned on the negative electrode (4), and anode (2) is positioned on the functional layer (3).
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| WO2008148263A1 (en) * | 2007-06-08 | 2008-12-11 | Truly Semiconductors Ltd. | Wiring method for checking wirings of an organic electroluminescent display |
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| CN103874256A (en) * | 2014-01-24 | 2014-06-18 | 南京第壹有机光电有限公司 | Driving circuit for OLED (organic light emitting diode) lighting device |
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