CN102655219A - Multicolour OLED (organic light-emitting diode), multicolour OLED unit and display device - Google Patents
Multicolour OLED (organic light-emitting diode), multicolour OLED unit and display device Download PDFInfo
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- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
- H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
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Abstract
The invention relates to the technical field of panel display, and provides a multicolour OLED (organic light-emitting diode), a multicolour OLED unit and a display device. According to the invention, the multicolour OLED emitting lights with different colours in one unit can be obtained by stacking a plurality of OLEDs, and arranging only one layer of common electrodes between the two adjacent OLEDs, so that the obtained multicolour OLED unit can greatly reduce the size of the pixel point of a displayer and obtain a good display effect; simultaneously, process steps are reduced, the process can be realized without the need to change present equipment, and requirements on the equipment are simple.
Description
Technical field
The present invention relates to technical field of flat panel display, particularly a kind of polychrome OLED, polychrome OLED unit and display device.
Background technology
Traditional CRT (Cathode ray tubes; Cathode ray tube) display is because of the wretched insufficiency of its product in the existence of aspects such as thickness, weight, radiation and power consumption; Substituted by various flat-panel monitor gradually, known flat panel display comprises LED (Light Emitting Diode, light-emitting diode), LCD (Liquid Crystal Display; Liquid crystal display), PDP (Plasma Display Panel; The plasma demonstration), FED (Field Emission Display, FED), OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) etc.
Though at present LCD is the flat-panel monitor of main flow; Especially combining TFT (Thin Film Transistor; Thin-film transistor) after the technology; The light and thin degree of its reaction speed, brightness, contrast and display has all obtained significantly promoting, yet because LCD panel itself can not be luminous, this class display must adopt the backlight counter plate to shine luminous; Thereby all there is certain limitation in it at aspects such as thickness of detector, angular field of view, reaction speed, brightness, contrast and power consumptions, can't obtain lifting further.
In this case; The light-emitting diode that this type of OLED processed by electroluminescent organic material; Because possess self-luminous (not needing backlight), contrast height, thin thickness simultaneously, the visual angle is wide, reaction speed is fast, can be used for the flexibility panel, the serviceability temperature scope extensively, excellent specific property such as structure and processing procedure be simple, be the mainstream technology of the flat-panel monitor of future generation of generally acknowledging.
Realizing colored the demonstration, on the same location of pixels of display, must provide multiple color (normally red at present R, green G, three kinds of main colors of blue B) to make up simultaneously, also is like this in LCD or OLED display.In general, a pixel comprises RGB three subpixels in LCD or the OLED display, and this three subpixels spatially is a parallel arranged, and the light that each subpixels forms a kind of color respectively makes up again.Seek out high-resolution panel, just need the size of reduced image vegetarian refreshments, but the method for reduced image vegetarian refreshments size is relatively more difficult, complex process.
For the color OLED display, each pixel is luminous to be that OLED by a plurality of different colours produces respectively, and reduced image vegetarian refreshments size will be dwindled the size of each sub-pixel OLED device.Limited by various factors owing to carry out the full accuracy of the meticulous mask (mask) of organic layer vapor deposition during preparation OLED, when making the OLED device in a conventional manner, after resolution acquires a certain degree, be difficult to be greatly improved again.Meticulous more simultaneously mask price is expensive more, and counter plate manufacturer also is a huge expenditure.
For this reason, occurred in the prior art a kind of a plurality of different colours OLED devices (being generally three kinds of colors of RGB) physically being overlaped, only taken the size of an OLED in the hope of making a pixel; Under this mode, just there are 2 multiple purpose electrodes (three looks just have 6 electrodes) in a plurality of overlapping OLED, because electrode is not fully transparent; A lot of light are absorbed by a plurality of electrodes; The output of light is poor, and display brightness and contrast are relatively low, and the anode of all devices is ITO; Complex process is damaged the OLED device that vapor deposition is good easily during sputtering ITO.
In addition, disclose a kind of 3 lamination OLED pixel cells among the Chinese patent open source literature CN1293425A, in an OLED unit, stacked the OLED of 3 different colours, separated by the compound electrode of an ITO layer between per two OLED with the metal level combination.The size that this structure also can make a pixel only take an OLED can be sent the combination of 3 coloured light, thereby has dwindled the pixel size.But this structure wants two kinds of different electrodes of vapor deposition to come to mate (promptly use metal level to be connected with the electron injecting layer of an OLED, and use the ITO layer to be connected with the hole injection layer of another OLED) with the energy level of hole injection layer with the electron injecting layer of adjacent two OLED between two adjacent OLED.So just increased the step of technology, and the sputtering ITO layer influences the organic layer device performance easily on organic layer, higher to the requirement of equipment, the improvement to light output effect and thickness does not simultaneously improve a lot yet yet.
Summary of the invention
The technical problem that (one) will solve
To above-mentioned shortcoming; The present invention is in order to solve polychrome OLED structure and complex process in the prior art, the not good problem of performance; A kind of polychrome OLED, polychrome OLED unit and display device are provided; Realize piling up of a plurality of OLED through simple structure and technology, need not that existing technology is done big improvement and can obtain preferable performance.
(2) technical scheme
Solve the problems of the technologies described above, the present invention specifically adopts following scheme to carry out for this reason:
At first, the present invention provides a kind of polychrome OLED, and said polychrome OLED is piled up by at least two OLED that send out the different colours light and forms;
Wherein, The hierarchical structure of each OLED is made up of anode, first organic layer, organic luminous layer, second organic layer and negative electrode successively; Said first organic layer by in hole injection layer, hole transmission layer and the electronic barrier layer at least one deck constitute in regular turn, said second organic layer by in hole blocking layer, electron transfer layer, the electron injecting layer at least one deck constitute in regular turn;
And, shared one deck common electrode layer between every adjacent two OLED, said common electrode layer as the male or female of an OLED among every adjacent two OLED the time also as the male or female of another OLED.
Preferably, first organic layer at each OLED carries out the doping of P type, second organic layer carries out the N type and mixes.
Preferably, have an OLED to be inverted with respect to another oled layer aggregated(particle) structure among every adjacent two OLED, the said common electrode layer while is as public anode or the common cathode of said adjacent two OLED.
Preferably, said at least two OLED that send out the different colours light are combination in any of at least two among red OLED, green OLED and the blue OLED.
Preferably, each electrode layer among the said polychrome OLED be metal, alloy, the unitary electrode layer that has in oxide or above-mentioned several kinds of good conductive function at least two kinds combination once form.
Further, the present invention also provides a kind of polychrome OLED the unit simultaneously, and said polychrome OLED unit is made up of substrate and the aforesaid polychrome OLED that forms in said substrate one side.
Preferably, said substrate or one deck electrode of pressing close to substrate be by having good reflection rate and lighttight material to constitute, and all the other each layer electrodes of not pressing close to said substrate are transparency electrode, and said polychrome OLED unit constitutes the top ballistic device.
Preferably, by having good reflection rate and lighttight material to constitute, said substrate and all the other each layer electrodes are photic zone away from the outermost layer electrode of said substrate, and said polychrome OLED unit constitutes end ballistic device.
At last, the present invention also provides a kind of display device, and each pixel of said display device is made up of an aforesaid polychrome OLED unit.
(3) beneficial effect
Pile up through a plurality of OLED among the present invention; Only utilize one deck public electrode can obtain in a unit, to send the polychrome OLED of different colours light between adjacent two OLED; Reduced processing step; Need just not change and can realize existing equipment, equipment requirements be simple and can obtain desirable effect.
Description of drawings
Fig. 1 is the structural representation of polychrome OLED unit among the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
The present invention relates to the polychrome OLED and the device thereof of multiple colour light emitting on the same location of pixels; Through polychrome OLED unit of design in a pixel; This element comprises the OLED of the active layer of sending out two or more color of light, is separated by one deck common electrode in the middle of two adjacent OLED.The multiple color that can realize a pixel shows, has improved panel resolution rate widely.
Common OLED device requires than higher the work function of electrode; Anode need inject with the hole/HOMO (the Highest Occupied Molecular Orbital of first organic layer of transmission equipment side; HOMO highest occupied molecular orbital; Expression has occupied the highest track of energy level of electronics) be complementary; Negative electrode need inject with electronics/and the LUMO of transmission equipment side second organic layer is complementary (expression does not occupy the minimum track of energy level of electronics for Lower Unoccupied Molecular Orbital, lowest unoccupied molecular orbital); So generally need to use two electrodes to come respectively and adjacent OLED device matching when piling up, promptly pile up with the form of first organic layer/electrode 1 (anode)/electrode 2 (negative electrode)/second organic layer.So, higher to the requirement of technology and equipment.Simultaneously, because the anode of common OLED device is transparent oxide film (like ITO or IZO etc.), sputter oxide skin(coating) on the device of having made also can damage the good organic layer of vapor deposition.
Mix and only need carry out the P type among the present invention at first organic layer; Carrying out the N type at second organic layer mixes; Can solve the energy level matching problem between organic layer and the electrode layer, make and shared one deck common electrode layer promptly to realize piling up of a plurality of OLED between every adjacent two OLED; In addition, also no longer be confined to transparent oxide film as the material of electrode (especially anode), and can select for use or doping metals, alloy or other conductive oxides.So just reduced the coupling requirement of electrode and organic layer, also the material of the feasible common electrode layer of choosing is more extensive, and processing step is simpler.
Perhaps; It is opposite with previous device architecture to design in adjacent two OLED devices second device architecture among the present invention; Inversion type device (the so-called inverted OLED device of just often saying; The device for preparing reversed in order exactly with the level of previous device, even previous device make earlier anode, again the vapor deposition organic film, make negative electrode at last, then the inversion type device is just made negative electrode earlier; Again the vapor deposition organic film, make anode at last; Cathode layer that like this can shared centre when inversion is piled up also saves the preparation process of a cathode layer), so also can be so that shared one deck common electrode layer promptly realize piling up of a plurality of OLED between every adjacent two OLED, thus form structure like first organic layer/common electrode layer (anode)/first organic layer or second organic layer/common electrode layer (negative electrode)/second organic layer.At this moment, also no longer be confined to transparent oxide film as the material of electrode (especially anode), and can select for use equally or doping metals, alloy or other conductive oxides.The stacked structure that this inversion type device forms has also reduced processing step, and need just not change existing equipment and can realize that equipment requirements is simple.
Below in conjunction with concrete embodiment polychrome OLED of the present invention and device thereof are described further.
Particularly, the structure of the polychrome OLED unit of present embodiment 1 is as shown in Figure 1, is made up of substrate 1, first electrode 2, an OLED3, second electrode 4, the 2nd OLED5, third electrode 6 respectively, constitutes ballistic device unit, top.Wherein:
The one OLED3 is common top ballistic device.The light that the one OLED3 is sent can see through second electrode 4, the 2nd OLED5, third electrode 6 and penetrate; Simultaneously the light that sends to first electrode, 2 directions of an OLED3 can be by 2 reflections of first electrode, and reverberation penetrates through an OLED3, second electrode 4, the 2nd OLED5, third electrode 6.
The 2nd OLED5 is the OLED device of inversion type.The light that the 2nd OLED5 is sent can see through third electrode 6 and penetrate, and the light that sends to first electrode, 2 directions of the 2nd OLED5 can reflect by first electrode 2 fully simultaneously, and reverberation is through an OLED3, second electrode 4, the 2nd OLED5, third electrode 6 ejaculations.
In present embodiment 1, polychrome OLED unit can send two kinds of different light simultaneously.This element can also expand to N layer (N is the natural number greater than 1), and one of adjacent two OLED device of common electrode are non-inversion type devices, and one is that the inversion type device is just passable, and the light of emission different colours can be sent out in all unit.
Polychrome OLED unit also constitutes ballistic device unit, top in the present embodiment 2, and its structure and embodiment 1 are basic identical, and be also as shown in Figure 1.Difference is that an OLED3 is that OLED device, the 2nd OLED5 of inversion type are common top ballistic device in present embodiment 2.Thereby second electrode 4 be public anode, first electrode 2, third electrode 6 are negative electrode.And:
The structure of polychrome OLED unit is also as shown in Figure 1 in the present embodiment 3; Difference is; Its two kinds of schemes with embodiment 1 and embodiment 2 have made ballistic device unit, the end into; It also need be transparent promptly needing transparent substrate 1 and first electrode 2 that links to each other with substrate 1, and third electrode 6 need be made the electrode of good reflection rate simultaneously.
Particularly; When first electrode 2 is anode; Need be transparent anode; Can be metal; Perhaps the alloy of several kinds of metals, or oxide or metal, the alloy of good conductive function arranged and the combination of the oxide of good conductive function arranged, like Ag, Au, Pd, Pt, ITO, IZO, Ag:Au, Ag:Pd, Ag:Pt, Al:Au, Al:Pd, Al:Pt, Ag:Au, Ag/Pd, Ag/Pt, Ag/ITO, Ag/IZO, Al/Au, Al/Pd, Al/Pt, Al/ITO, Al/IZO, Ag:Pd/ITO, Ag:Pt/ITO, Al:Au/ITO, Al:Pd/ITO, Al:Pt/ITO, Ag:Au/ITO, Ag:Pd/IZO, Ag:Pt/IZO, Al:Au/IZO, Al:Pd/IZO, Al:Pt/IZO, Ag:Au/IZO etc.This electrode needs first organic layer coupling (preferably, work function is more preferably greater than 4.0ev) of stability, work function and an OLED3 of good electrical conductivity, good transmissivity, good chemistry and form.
This moment, third electrode 6 need be for having good reflection rate and lighttight anode; Can be metal, perhaps the alloy of several kinds of metals is like Ag, Au, Pd, Pt, Ag:Au, Ag:Pd, Ag:Pt, Al:Au, Al:Pd, Al:Pt, Ag:Au, Au/Ag, Pd/Ag, Pt/Ag etc.This electrode needs first organic layer coupling (preferably, work function is more preferably greater than 4.0ev) of stability, work function and the 2nd OLED5 of good electrical conductivity, good reflectivity, good chemistry and form.
When first electrode 2 is negative electrode; Need be transparent negative electrode; Can be metal; The perhaps alloy of several kinds of metals; The oxide that the good conductive function is perhaps arranged, perhaps metal, alloy and the combination of the oxide of good conductive function is arranged are like Al, Mg, Ca, Li, Yb, ITO, IZO, Mg:Ag, Yb:Ag, Ag/Mg, Ag/Yb, Ag/Li, Ag/Al, Ca/Ag, ITO/Al, ITO/Ca, ITO/Li, ITO/Yb, ITO/Mg, ITO/Mg:Ag, ITO/Yb:Ag, IZO/Al, IZO/Ca, IZO/Li, IZO/Yb, IZO/Mg, IZO/Mg:Ag, IZO/Yb:Ag etc.This electrode needs second organic layer coupling (preferably, work function is preferably less than 4.0ev) of stability, work function and an OLED3 of good electrical conductivity, good transmissivity, good chemistry and form.
This moment, third electrode 6 need be for having good reflection rate and lighttight negative electrode; Be metal, the perhaps alloy of several kinds of metals, as: Al, Ag, Mg, Al:Ag, Mg:Ag, Al/Ag, Mg/Ag etc.This electrode needs second organic layer coupling (preferably, work function is preferably less than 4.0ev) of stability, work function and the 2nd OLED5 of good electrical conductivity, good reflectivity, good chemistry and form.
The structure of polychrome OLED unit is also as shown in Figure 1 in the present embodiment 4; Difference is; Also mix in the present embodiment 4 to carrying out the P type with contacted first organic layer of anode among an OLED3 and the 2nd OLED5; Mix to carrying out the N type with contacted second organic layer of negative electrode, the organic layer that carries out after the above-mentioned processing requires to reduce to the coupling of electrode; At this moment, the 2nd OLED5 can be inversion type with respect to an OLED3, also can directly not pile up for inversion type adopts identical hierarchical structure.The scheme that cause is directly piled up is simple relatively, still is that example describes with the inversion type in the present embodiment 4.
In the present embodiment 4, second electrode 4 is an OLED3 and the public negative electrode of the 2nd OLED5, and first electrode 2, third electrode 6 are anode; Common formation ballistic device unit, top.Wherein, first electrode 2 is for having good reflection rate and lighttight anode; Be metal; The perhaps alloy of several kinds of metals; Perhaps metal, alloy and the combination of the oxide of good conductive function is arranged, as: metals such as Ag, Au, Pd, Pt, Al, Mg, Li, Ca, Yb, Ag:Au, Ag:Pd, Ag:Pt, Al:Au, Al:Pd, Al:Pt, Ag:Au, Mg:Ag, Ag/Pd, Ag/Pt, Ag/ITO, Ag/IZO, Al/Au, Al/Pd, Al/Pt, Al/ITO, Al/IZO, Ag:Pd/ITO, Ag:Pt/ITO, Al:Au/ITO, Al:Pd/ITO, Al:Pt/ITO, Ag:Au/ITO, Ag:Pd/IZO, Ag:Pt/IZO, Al:Au/IZO, Al:Pd/IZO, Al:Pt/IZO, Ag:Au/IZO all can.This electrode needs good electrical conductivity, good reflectivity, good chemistry and the stability of form, but do not require work function whether with the organic layer coupling of an OLED3.
And second electrode 4, third electrode 6 are transparent electrode; Be metal, the perhaps alloy of several kinds of metals, as: Ag, Au, Pd, Pt, Al, Mg, Li, Ca, Yb, Ag:Au, Ag:Pd, Ag:Pt, Al:Au, Al:Pd, Al:Pt, Ag:Au, Mg:Ag, Ag/Pd, Ag/Pt etc.This electrode needs good electrical conductivity, good transmitance, good chemistry and the stability of form, but do not require work function whether with the organic layer coupling of an OLED3 and/or the 2nd OLED5.
The structure of polychrome OLED unit is also as shown in Figure 1 in the present embodiment 5, and with respect to embodiment 4, its difference only is that first electrode 2, third electrode 6 are negative electrode, and second electrode 4 is public anode.Wherein, first electrode 2 is for having good reflection rate and lighttight negative electrode; Be metal, perhaps the alloy of several kinds of metals or metal and the combination of the oxide of good conductive function is arranged.This electrode needs good electrical conductivity, good reflectivity, good chemistry and the stability of form, but do not require work function whether with the organic layer coupling of an OLED3.
Further, the ballistic device unit, top among embodiment 4 and the embodiment 5 also can make ballistic device unit, the end into, and improved procedure and embodiment 3 are similar, repeat no more at this.
Polychrome OLED among the present invention piles up through inverted OLED and/or adopts different doped forms to reduce the coupling requirement of organic layer to electrode; Thereby make and only utilize one deck public electrode can obtain in a unit, to send the polychrome OLED of different colours light between adjacent two OLED; The polychrome OLED unit that obtains thus can dwindle display picture element point size greatly and obtain preferably display effect and desirable thickness of detector; Reduced processing step simultaneously; Need just not change and to realize that equipment requirements is simple existing equipment.
Above execution mode only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and real protection scope of the present invention should be defined by the claims.
Claims (9)
1. a polychrome OLED is characterized in that, said polychrome OLED is piled up by at least two OLED that send out the different colours light and forms;
Wherein, The hierarchical structure of each OLED is made up of anode, first organic layer, organic luminous layer, second organic layer and negative electrode successively; Said first organic layer by in hole injection layer, hole transmission layer and the electronic barrier layer at least one deck constitute in regular turn, said second organic layer by in hole blocking layer, electron transfer layer, the electron injecting layer at least one deck constitute in regular turn;
And, shared one deck common electrode layer between every adjacent two OLED, said common electrode layer as the male or female of an OLED among every adjacent two OLED the time also as the male or female of another OLED.
2. polychrome OLED according to claim 1 is characterized in that, carries out at first organic layer of each OLED that the P type mixes, second organic layer carries out the N type and mixes.
3. polychrome OLED according to claim 1 and 2 is characterized in that, has an OLED to be inverted with respect to another oled layer aggregated(particle) structure among every adjacent two OLED, and the said common electrode layer while is as public anode or the common cathode of said adjacent two OLED.
4. polychrome OLED according to claim 1 is characterized in that, said at least two OLED that send out the different colours light are combination in any of at least two among red OLED, green OLED and the blue OLED.
5. polychrome OLED according to claim 1 is characterized in that, the unitary electrode layer that each electrode layer among the said polychrome OLED is metal, alloy, have in oxide or above-mentioned several kinds of good conductive function at least two kinds combination once form.
6. a polychrome OLED unit is characterized in that, said polychrome OLED unit constitutes like each described polychrome OLED of claim 1-5 by substrate with what said substrate one side formed.
7. polychrome OLED according to claim 6 unit; It is characterized in that; Said substrate or one deck electrode of pressing close to substrate be by having good reflection rate and lighttight material to constitute, and all the other each layer electrodes of not pressing close to said substrate are transparency electrode, and said polychrome OLED unit constitutes the top ballistic device.
8. polychrome OLED according to claim 6 unit; It is characterized in that; By having good reflection rate and lighttight material to constitute, said substrate and all the other each layer electrodes are photic zone away from the outermost layer electrode of said substrate, and said polychrome OLED unit constitutes end ballistic device.
9. a display device is characterized in that, each pixel of said display device constitutes like each described polychrome OLED unit of claim 6-8 by one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100438267A CN102655219A (en) | 2012-02-23 | 2012-02-23 | Multicolour OLED (organic light-emitting diode), multicolour OLED unit and display device |
| PCT/CN2012/083323 WO2013123779A1 (en) | 2012-02-23 | 2012-10-22 | Polychromatic oled, polychromatic oled unit, and display apparatus |
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| CN2012100438267A CN102655219A (en) | 2012-02-23 | 2012-02-23 | Multicolour OLED (organic light-emitting diode), multicolour OLED unit and display device |
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| WO2013123779A1 (en) * | 2012-02-23 | 2013-08-29 | 京东方科技集团股份有限公司 | Polychromatic oled, polychromatic oled unit, and display apparatus |
| CN103872068A (en) * | 2012-12-14 | 2014-06-18 | 京东方科技集团股份有限公司 | Variable-color light-emitting element, pixel structure and display device |
| CN104022142A (en) * | 2014-06-12 | 2014-09-03 | 四川虹视显示技术有限公司 | Top emission AMOLED device with high aperture opening ratio and manufacturing method |
| CN104183708A (en) * | 2013-05-21 | 2014-12-03 | 海洋王照明科技股份有限公司 | Organic light emission device and manufacturing method thereof |
| CN104183750A (en) * | 2013-05-22 | 2014-12-03 | 海洋王照明科技股份有限公司 | Organic light-emitting device and manufacturing method thereof |
| CN104183722A (en) * | 2013-05-22 | 2014-12-03 | 海洋王照明科技股份有限公司 | White-light organic light emission diode and preparation method thereof |
| CN104183765A (en) * | 2013-05-22 | 2014-12-03 | 海洋王照明科技股份有限公司 | Organic light emitting diode and preparation method thereof |
| CN104183755A (en) * | 2013-05-22 | 2014-12-03 | 海洋王照明科技股份有限公司 | White-light organic light-emitting device and preparation method thereof |
| WO2015018153A1 (en) * | 2013-08-09 | 2015-02-12 | 京东方科技集团股份有限公司 | Display panel and drive method therefor, and display device |
| JP2019133921A (en) * | 2018-01-29 | 2019-08-08 | 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． | Organic light-emitting display apparatus and method of manufacturing the same |
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