CN1219722A - Organic electroluminescent display panel and method for fabricating the same - Google Patents
Organic electroluminescent display panel and method for fabricating the same Download PDFInfo
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- CN1219722A CN1219722A CN 98118395 CN98118395A CN1219722A CN 1219722 A CN1219722 A CN 1219722A CN 98118395 CN98118395 CN 98118395 CN 98118395 A CN98118395 A CN 98118395A CN 1219722 A CN1219722 A CN 1219722A
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Abstract
Effective and uniform driving of a large organic EL display panel has been made possible by forming a plurality of stripes for each of fist electrodes and also for each of second electrodes. These strips are electrically isolated from each other, which enables each group of pixels defined by a set of orthogonal strips to be driven separately from the remaining groups of pixels. Efficient fabrication methods devised to construct said display panel are cost effective and suitable for mass production.
Description
The present invention relates to a kind of organic field luminescence (being called EL later on) display board, it comprises organic EL unit luminous when electric charge injects emission layer.
The technology of organic EL device develops by leaps and bounds, and has successfully showed several sample modules in exhibition, and organic EL device is also referred to as Organic Light Emitting Diode (LEDs).But the extremely thin array address of organic EL device, can work being usually less than under 15 volts the quite low voltage.In addition, their also have more feature that is fit to flat pannel display of future generation (FPDs), for example, and comprising almost not to the dependence at visual angle and device good formability on flexible substrates.The major defect of liquid crystal display (the most known demonstration of current selection) is that their major parts all need the back illumination that becomes clear, and this can overcome by using organic EL to show easily.
Organic LED s is different basically with conventional inorganic LEDs.When the electric charge in the inorganics shifts when being the compound interband emission that causes light of nature band shape and electronics vacancy, jump migration and be stimulated emission of the excited electron that organic membrane is common to be characterised in that low mobility.Organic EL device is also different with the inorganic El element of routine basically, and especially, organic EL device can be worked under low dc voltage.
A large amount of research has related to efficiency improvement and the color control of organic LEDs.The efficient of now having demonstrated organic EL device can adapt to many commerce really and use.In addition, the color control not most of potential application of restriction probably.According to this point, we believe that its commercial Application Prospect is wide for organic EL device.For many application, the performance of organic EL device is quite satisfied.For the commercialization of organic EL device, consider to be worth according to certain products and manufacturing technology.Concrete consideration of using makes us think, must do more work so that organic EL commercialization with regard to manufacturability, homogeneity, reliability and system problem.
Show that in order to be applied to large-scale surface plate it is crucial having uniform emission on the entire display screen curtain, just and this has only when organic functional layer is formed uniformly in whole active observation district and can obtain.Also have a major issue indirectly but closely relevant, promptly owing to drive the difficulty that large-scale organic EL plate is produced with the passive matrix addressing scheme with the manufacturing of large-scale OLED panel.Driving the simplest method of organic EL plate is to sandwich organic function layer between two groups of crossed electrodes (as row and row electrode).In this passive addressed mode, EL element is as showing and switching function.In principle, organic EL allows multiplexed in a large number with this addressing mode with nonlinear current-voltage like the diode-like.Yet when OLED panel became big, it is obvious that problem to be discussed below will become.
At first, well-known, owing to be used as the bad and sizable electric capacity of organic layer of some electric conductivity of typical material tin indium oxide (ITO) of transparency electrode, the RC time-delay is significant in organic EL shows.Along with the size increase of plate, time-delay becomes excessive.The more important thing is that organic EL display element does not have intrinsic storer, therefore just need very high peak brightness for the addressing of passive matrix formula, this has just limited the line number of display board.Instantaneous peak value brightness is directly proportional with (line number) * (mean flow rate).In order to obtain 100cd/m
2Average display brightness, for example, maximum line number may will be limited in less than 500.By the hypothesis peak brightness is 50000cd/m
2Estimate that this peak brightness is to be difficult to realize, and the stability of device will be crucial problem certainly under such high brightness.In addition, instantaneous high electric current can cause the big IR voltage drop along the bus of row and row, and this will cause the unevenness of brightness on the screen surface.
Solution to the problems described above is to resemble a tft liquid crystal shows in (TFT-LCD) to use active-addressed method.But, active matrix EL (AM-EL) cost height, and the more important thing is and other display techniques that (PDP) compares as plasma display panel, owing to having become big, display size lacks competitiveness.Like this, make the organic EL plate of a kind of large-scale passive addressable with regard to the method for being badly in need of a kind of practicality of design, as far as our knowledge goes, this does not also invent.
Therefore, the present invention relates to a kind of organic electroluminescent display panel, it can get rid of the several problems that caused by restriction discussed above and shortcoming substantially.
An object of the present invention is to provide a kind of have the passive addressable organic electroluminescent display panel of a plurality of daughter boards and the method for making this plate.
During other features and advantages of the present invention will be presented at and describe below, and partly will from describe, become apparent, perhaps can recognize by example of the present invention.Can realize and obtain purpose of the present invention and other advantages by the structure that in instructions and its claims and accompanying drawing, particularly points out.
According to an aspect of the present invention, a kind of organic electroluminescent display panel with a plurality of luminous components comprises:
A transparent substrate;
Many first electrodes that are formed on the described transparent substrate, each first electrode is all made by the band of many electrically insulated from one another, each band is electrically connected with the first bus electrode, the first bus electrode is made of single or a plurality of conductive materials, if necessary, electric insulation layer of vertical stack between each first bus electrode, each said lamination has the first bus electrode that is arranged side by side in electrical isolation gap to constitute between it by one or more;
Be formed on the organic function layer on described first electrode, which comprises at least an organic EL dielectric layer; With
Be formed on a plurality of second electrodes on the described organic function layer, each second electrode is made of the band of many electrically insulated from one another, each band is electrically connected with the second bus electrode of being made by single or multiple conductive materials, if necessary, electric insulation layer of vertical stack between each first bus electrode, each said lamination has the second bus electrode that is arranged side by side in electrical isolation gap to constitute between it by one or more.
According to a further aspect in the invention, a kind of new method that is used to make the OLED panel with a plurality of radiating portions comprises step:
Form a plurality of first electrodes, each first electrode all is made of the band of a plurality of electrically insulated from one another;
Form first group of first bus electrode, each first bus electrode all is electrically connected with corresponding first electrode;
Second group of first bus electrode of formation above the insulation course that on described first group of first bus electrode, forms again, perhaps near described first group of first bus electrode of correspondence, laterally form second group of first bus electrode, in any case, each first bus electrode all is electrically connected with corresponding first electrode;
If necessary, be concatenated to form more groups first bus electrodes as stated above;
Form the connection gasket of first group of second bus electrode and they, make the second bus electrode in subsequently step and corresponding second electrode electrical connection that will deposit forms by connection gasket;
Second group of second bus electrode of formation above the insulation course that on described first group of second bus electrode, forms again, perhaps near the second described first group bus electrode of correspondence, laterally form second group of second bus electrode, in any case, second group of second bus electrode all has connection gasket, makes the described second bus electrode and will be electrically connected by the second corresponding electrode of deposit in later step by connection gasket;
If necessary, be concatenated to form more groups second bus electrodes as stated above;
At least on described first electrode, be laminated to the organic function layer that comprises an organic EL dielectric layer less;
Etch away the part of the organic function layer of correspondence second electrode that is deposited on above the connection gasket, the surface of exposing described connection gasket; With
Formation second electrode on the surface of exposing of described organic function layer and described connection gasket makes between described second electrode and the corresponding connection gasket to be electrically connected;
Should be appreciated that the general introduction of front and following detailed both are exemplary with indicative, claim will provide further explanation of the present invention.
Included further understanding is of the present invention, be added in the instructions and constitute the accompanying drawing of the part of instructions, describes embodiments of the invention and is used from instructions one and explain principle of the present invention.
In the accompanying drawing:
Fig. 1 represents the planimetric map according to the OLED panel of a preferential embodiment of the present invention;
Fig. 2 represents to have the planimetric map of the display board of (4 * 4) individual daughter board;
Fig. 3 is the synoptic diagram that expression forms the process of a plurality of first electrodes and a plurality of connection gaskets that are used for first and second electrodes;
Fig. 4 is the band of expression first electrode and the synoptic diagram of corresponding contact mat electrical connection process;
Fig. 5 a is that close up view and Fig. 5 b of represented four daughter boards of 2-f among Fig. 4 represents along the drawing in side sectional elevation of A-A1 line among Fig. 5 a;
The another kind of mode that the band that Fig. 5 c-d has described first electrode and corresponding contact mat are electrically connected;
Fig. 6 a-b is expression covers the first bus electrode process with insulation course a planimetric map;
Fig. 7 a is expressed as the synoptic diagram that the second bus electrode forms the process of a buffer insulation layer, and Fig. 7 b represents along the sectional view of B-B ' line among Fig. 7 a;
Fig. 7 c has represented the process of carrying out together about two steps of Fig. 6 a-b and Fig. 7 a-b in a step; Fig. 7 d and Fig. 7 e represent respectively the sectional view along A-A ' among the 7c and B-B ';
Fig. 8 a is the planimetric map that expression forms the second bus electrode process; Fig. 8 b is that figure and a Fig. 8 c that has amplified represents along the drawing in side sectional elevation of Fig. 8 a center line B-B ';
Fig. 9 a-c is expressed as the planimetric map that the second bus electrode forms the insulation course process;
Figure 10 a-c is expressed as the process that pixel forms electrical isolation protection thing;
Figure 11 represents to form the process with the electrical isolation protection thing of the second electrode electrical isolation in second electrode in the A district and the B district;
Figure 12 a presentation layer is pressed with the process of machine functional layer; Figure 12 b is the figure that has amplified, and Figure 12 c is the sectional view along Figure 12 a center line B-B ';
Figure 13 a represents to etch the process that organic function layer exposes the part of the second bus electrode 10-b ' by the top at described bus electrode 10-b '; Figure 13 b is a close up view;
Figure 14 a represents to form the process of second electrode; Figure 14 b is that the figure and Figure 14 c that have amplified represent along the sectional view of Figure 14 a center line B-B ';
Figure 15 represents to have the planimetric map of the display board of (6 * 6) individual daughter board;
Figure 16 is that expression forms a plurality of first electrodes and a plurality of process that is used for the contact mat of first and second electrode;
Figure 17 a is the band of expression first electrode and the synoptic diagram of corresponding contact mat connection procedure, and Figure 17 b is the sectional view along Figure 17 a center line A-A ';
Figure 18 a is a planimetric map of representing to cover with an insulation course the first bus electrode process, and Figure 18 b is the sectional view along Figure 18 a center line A-A ';
Figure 19 a-b is a synoptic diagram, and having described is the process that the second bus electrode forms the buffer insulation layer;
Figure 20 a is a synoptic diagram, has described the process that forms the second bus electrode;
Figure 20 b is that the figure and Figure 20 c that have amplified represent along the sectional view of Figure 20 a center line B-B ';
Figure 21 a-b is a planimetric map, and having described is the process that the second bus electrode forms insulation course;
Figure 22 a-c has described the method that forms the electrical isolation protection thing that second electrode is spaced laterally apart and will the second electrode group in C, D, E zone separates;
Figure 23 a-c presentation layer is pressed with the machine functional layer also by etch the process that organic function layer exposes the part of the second bus electrode 10-b ' on described bus electrode 10-b ';
Figure 24 a-c has described the process that forms second electrode;
Figure 25 a-b is a sectional view of describing the standard method that forms the multilayer second bus electrode; Figure 25 a is that every layer two capable bus electrode and Figure 25 b are every layer of delegation's bus electrodes; With
Figure 26 a-b is a skeleton view of describing the first and second bus electrode intersections: Figure 26 a is that every layer two capable bus electrode and Figure 26 b are every layer of delegation's bus electrodes.
The example of describing is below with reference to the accompanying drawings described the preferred embodiments of the present invention in detail.
Fig. 1 is the planimetric map that OLED panel is according to one preferred example of the present invention described in signal.OLED panel 1 have and be divided into (2M * 2N), that is, the big viewing area of 2M row and the capable daughter board 2 of 2N, wherein M and N are the integers greater than 2.Electricity drives each daughter board to avoid and the big active-addressed corresponding problem of panel respectively.Fig. 2 has specifically represented a display board with (4 * 4) individual daughter board.Plate 1 has the active viewing area that is made of 16 daughter boards 2.A series of making steps of the typical display board of designed the having of the present invention (4 * 4) daughter board have been described in Fig. 3-14c.
In Fig. 3 first procedure of processing, on transparent, insulating substrate 3; Deposit layer of transparent conductor is generally tin indium oxide (ITO), and by photoetching described illuvium is patterned into a plurality of bands 4.Described first electrode is that with the obvious difference that is used in the anode in the typical matrix addressing each first electrode all is divided into 4 bands.Each band mutually insulated of an electrode is used for driving respectively each daughter board 2 of display board.Fig. 3 also shows a plurality of contact mat 5﹠amp of corresponding first and second electrodes of difference that form on transparent substrate; 6.Form described contact mat in can be during forming first electrode.
Then, be electrically connected forming between the band of first electrode and the corresponding contact mat by the first bus electrode.In Fig. 4, also show the short 7-a of connection between outside band 4-A and the corresponding contact pad 5, and, during previous step, connect by come composition ITO can form quite simply with this form that simply both is coupled together.By long connect of the first bus electrode 7-B between inner strip 4-B and corresponding contact pad 5, the first bus electrode 7-B is preferably by high-conductive metal, and for example aluminium or its alloy form.Have several different modes to form the described first bus electrode 7-B, a preferable methods is to use the technology (lift-offprocess) of removing only to form the bus electrode on the position of selecting.Can use vapour deposition, electron beam emission, RF sputter, chemical vapour deposition (CVD), spin coating, dipping, Dr.blade method, electricity and chemical coating and screen plate printing method arbitrary method wherein to carry out the film growth.Fig. 5 A is a close up view of being appointed as 4 daughter boards of 2-F in Fig. 4, and Fig. 5 B represents along the cross-sectional view of the line A-A ' of Fig. 5 A.
Can reduce effectively along the IR voltage drop of the long side of the band of each rectangular shaped of first electrode by the contact area between the band that is increased in each first bus electrode and corresponding first electrode, evenly launch thereby be convenient to daughter board.In some sense, the described first bus electrode is as the auxiliary electrode of the band of first electrode, because ITO is much bigger as the resistance of the metal of bus electrode as the resistance ratio of first electrode usually.Preferable methods is that the long limit of the corresponding rectangular shaped in edge forms each bus electrode, and shown in Fig. 5 c, both electrically contact on the sizable part on the whole length on the long limit of described band or described long limit to make them.Described contact can be that the long limit along described band is continuous or equally distributed along its length.
In next step, formation one deck electrical insulation material layer (see figure 6) on the described first bus electrode 7-B.Require described layer 8 mechanical property and stable chemical performance, and can make by the organic or inorganic insulating material, preferable material is an inorganic constituents, for example monox and silicon nitride, and can use vapour deposition, electron beam emission, RF sputter, chemical vapour deposition (CVD), spin coating, dipping, Dr.blade method, electricity to carry out film with chemical coating and screen plate printing method arbitrary method wherein and grow.
Fig. 7 A describes the synoptic diagram that forms buffer insulation layer process, will form the second bus electrode with the first bus electrode quadrature in step subsequently on described buffer insulation layer.The effect of described cushion 9 is to make the first bus electrode and the second bus electrode electrical isolation.The material that is used to form described cushion and film growing method basically with Fig. 6 in insulation course 8 identical.Also can form described cushion (seeing Fig. 7 c-e) with insulation course 8 in previous step.
In the step of following, the second bus electrode of the formation and the first bus electrode quadrature is shown in Fig. 8 a-c.The effect of described bus electrode is that contact mat 6 is electrically connected with second electrode that will form at next step.Can save the short 10-A of connection according to employed structure type.Make the long 10-B of connection major part be formed on insulation course 9 above, and shown in Fig. 8 B, a part of described bus electrode 10-B ' is formed on and regional 12 different not coating on first electrode layer 4 (ITO) open area 11.Can use with the first bus electrode identical materials and film growing method and form the second bus electrode.
Then, on the described second bus electrode, form insulation course, shown in Fig. 9 a-c.According to the structure type that is adopted, can save described insulation course 13.The material of described insulation course 13 and method for making are basically with foregoing identical.
By the way, it should be noted, can before forming the first bus electrode, form the second bus electrode.
Following making step is actually transformable, and it depends on that the display mode and the pixel that are adopted form (pixelation) scheme.For example; if a scheme is to select as the electricity consumption insulation protection thing that is proposed in U.S patent No.5701055 adjacent image point to be separated; then must on described insulation course, be formed for the described protection thing of the first or second bus electrode, no matter the back forms anything.In order to make monochromatic the demonstration, a series of organic materials are made laminated simply.But, in order to constitute polychrome or panchromatic demonstration, need to use additional shadow mask: (1) is placed on shadow mask on the upper surface of protection thing, shadow mask has a plurality of openings, each opening all expose between described protection thing or of first or second electrode, it is careless which is all suitable, make opening respectively with described electrode alignment; (2) respectively first organic media is deposited on the described electrode between the described protection thing by described opening, thereby forms first (R) organic function layer; (3) after shadow mask is aimed at again, repetitive process (2) is to form second (G) and the 3rd (B) organic function layer; And (4) form one second electrode at least on described protection thing and described organic function layer.
Figure 10 a-c describes the process of the electrical isolation protection thing that forms pixel recited above.Here, be used as the described protection thing 14 of formation above the insulation course 13 of cushion.Need an additional protection thing 15 to make second electrode in A district and the second electrode electrical isolation in B district, as shown in figure 11.
Then, as what from Figure 12 a-c, seen, laminating molding organic function layer 16.A typical green emitter can have following organic function layer: cushion is injected in (1) hole that is generally the thick copper phthalocyanine (CuPc) of 10nm～20nm, (2) one are generally the thick N of 30nm～50nm, N '-diphenyl-N, N '-two (3-aminomethyl phenyl)-(1,1 '-xenyl)-4,4 '-diamines (TPD) (N, N '-diphenyl-N, N '-bis (3-methylphenyl)-(1,1 '-bipheny)-4,4 '-diamine (TPD)) hole moving layer, and (3) three (8-hydroxyl-chinol salt) aluminium (tris (8-hydroxy-quinolate)) (Alq that 40nm～60nm is thick
3) emission layer, usually be mixed with a part as the emission dyestuff of coumarin 6 or quinoline pyridine ketone (quinacridone) and so on.One of method for optimizing of making panchromatic display board is, use foregoing a plurality of protection thing and shadow mask step by step with each laminating molding of red, green and blue emissive material to corresponding pixel.
Figure 13 a-b describes in order to make described bus electrode and step (Figure 14 a-c) method that will electrically contact between the second electrode lay of deposit, the part of the second bus electrode 10-B ' be exposed by the organic function layer that etches away the right deposit on described bus electrode 10-B ' below.Preferably can use dry-etching method to carry out etching as reactive ion etching or laser-induced thermal etching and so on.For the sake of clarity, only show the window that corresponding each second bus electrode electrically contacts among the figure, still, if necessary, the quantity of described contact window or connection gasket for example rises to one of each pixel.For most application, contact window of each bus electrode is just enough because the material of second electrode (Al, Mg: Ag or Al: Li) have usually than first electrode (ITO) low the resistivity that manys.
After forming second electrode, then form protective seam and encapsulate to finish the making of plate.
The typical method for making of described (4 * 4) individual daughter board can be used for making the making of a plate with (6 * 6) individual daughter board as shown in figure 15 that more strengthens.Owing to be symmetrical, so only (3 * 3) individual daughter board (Figure 16) is described the making step that just should be enough to illustrate (6 * 6) individual daughter board.The description of Figure 17 a-24c relates to described making step with plate of (3 * 3) daughter board, and is identical with (4 * 4) making step of having described basically.But following several difference is arranged.As what seen at Figure 17 a-b, comparing with (4 * 4) also needs each first electrode multiform to become a bus electrode.Show the bus electrode that twice deposit side by side at this, but also can be by every stacked formation sandwich construction that adds one, shown in Figure 25 B.Figure 20 a-c has represented to compare with (4 * 4) situation of the many bus electrodes of each second electrode again, i.e. 10-A, 10-B, and 10-C.
Usually, above-mentioned method for making can both extend to and make and to have (2M * 2N) or (M * N) making of the display board of daughter board.If so, shown in Figure 25 a-b, need form the bus electrode with sandwich construction.Can form these multilayer bus electrodes by film or thick film processing technology rules.As a reference, Figure 26 a-b describes the skeleton view that the first and second bus electrodes intersect.
With one independent but and not exclusively the driving circuit relevant with other driving circuit can drive each daughter board of making as mentioned above.The individual drive here means that each daughter board all has independent sweep trace and the data line with other circuit strict synchronism.
Organic EL device of the present invention has following advantage.
By being formed a plurality of bands, each first electrode and each second electrode can drive a big OLED panel effectively.These bands are electrically insulated from each other, and make each the group pixel that is limited by a collection of orthogonal stripes organize pixel with other and separate driving.Effective method for making of the described display board of manufacturing that is provided is acceptable on cost and is suitable for producing in enormous quantities.
Under the situation that does not break away from the spirit or scope of the present invention, organic electroluminescent display panel of the present invention is carried out various modifications and changes for those skilled in the art is conspicuous.Therefore, the present invention has covered modification of the present invention and the change in the scope that falls into claim and its equivalent.
Claims (35)
1, a kind of organic field luminescence (EL) display board comprises:
A plurality of radiating portions that are laminated between a plurality of first and second electrodes, each of said a plurality of first and second electrodes all is a plurality of conductive layers with the row and column arranged in matrix, and said conductive layer electrically insulated from one another, wherein said row and column matrix is divided into n * m daughter board.
2, according to the described OLED panel of claim 1, further comprise:
A substrate forms said a plurality of first electrodes on said substrate, and in said a plurality of first electrode each all is electrically connected with the first bus electrode; With
Be formed on the organic function layer on said first electrode, in the said organic function layer each comprises an organic EL dielectric layer at least, form said a plurality of second electrodes on said organic function layer, each in said a plurality of second electrodes all is electrically connected with one second bus electrode.
3, OLED panel according to claim 2, in the wherein said first and second bus electrodes each comprises that all a part accompanies the sandwich construction of vertical stack of electric insulation layer therebetween, each sandwich construction that vertically superposes all comprise be arranged side by side have one of said a plurality of first and second bus electrodes in electrical isolation gap therebetween.
4, OLED panel according to claim 2 wherein forms each band and the first corresponding bus electrode of said first electrode, so that keep electrically contacting a position at least.
5, OLED panel according to claim 2, the wherein said first and second bus electrodes are made by at least a conductive material, and said substrate is made by transparent material.
6, OLED panel according to claim 5, wherein said conductive material are made of a kind of in metal, alloy and the conducting polymer at least.
7, OLED panel according to claim 6, wherein said metal are a kind of in aluminium, copper, nickel, chromium, silver and the gold.
8, a kind of organic field luminescence (EL) display board comprises:
The a plurality of daughter boards that are divided into a plurality of radiating portions;
A substrate, on substrate, be formed with corresponding a plurality of first electrodes of daughter board and with a plurality of first signal buses of corresponding first electrode coupling;
From the secondary signal bus that substrate is given prominence to, separated, be used for exposing respectively the part of at least the first electrode;
At least form one of described first organic function layer, second organic function layer and the 3rd organic function layer on the part that described first electrode exposes, each described first organic function layer, second organic function layer and the 3rd organic function layer comprise a kind of organic electroluminescent medium at least; And
That form above at least one at said first, second and the 3rd organic function layer and with a plurality of second electrodes of corresponding secondary signal bus coupling.
9, OLED panel according to claim 8, wherein said a plurality of daughter boards are pressed the daughter board arrayed of n * m, and n and m are the integers greater than 2 here.
10, OLED panel according to claim 8 further comprises a plurality of protection things that are formed on the corresponding secondary signal bus.
11, OLED panel according to claim 10, wherein corresponding second electrode are formed on each protection thing.
12, OLED panel according to claim 11 wherein is formed with at least one of corresponding first, second and the 3rd organic function layer between corresponding second electrode and each protection thing.
13, OLED panel according to claim 8 further is included in the protection thing that forms on the corresponding first signal bus between the adjacent daughter board.
14, OLED panel according to claim 8, wherein each described a plurality of first and second electrode includes a plurality of first and second conductive layers by the arrayed of row and column respectively, and each said first and second conductive layer is mutually insulated all.
15, OLED panel according to claim 14, wherein said a plurality of first conductive layers are made by a kind of light transmitting material.
16, OLED panel according to claim 15, wherein light transmitting material is a tin indium oxide.
17, OLED panel according to claim 8, wherein said substrate are transmitted light.
18, OLED panel according to claim 14, wherein said first conductive layer is rectangular basically.
19, OLED panel according to claim 18, wherein corresponding first conductive layer in corresponding daughter board comprises a plurality of cuttings on rectangular basically one side.
20, OLED panel according to claim 14, wherein said a plurality of second conductive layers are made by one of low-resistance metal and alloy.
21, OLED panel according to claim 20, wherein low resistive metal is an aluminium, alloy is Mg: Ag and Al: one of Li.
22, OLED panel according to claim 14, wherein, direction by row between one of first conductive layer of the vicinity that is coupled on first limit of corresponding at least first conductive layer and corresponding first conductive layer that is being coupled on second limit forms described a plurality of first signal bus, and described first limit here is the limit different with first conductive layer with second limit.
23, OLED panel according to claim 22, wherein, direction by row between one of second conductive layer of the vicinity that is coupled on first limit of corresponding at least second conductive layer and corresponding second conductive layer that is being coupled on second limit forms described a plurality of secondary signal bus, and described first limit here is the limit different with second conductive layer with second limit.
24, OLED panel according to claim 23, in wherein said a plurality of first signal bus each comprises that at least one is formed on on-chip first conduction and connects and cover first insulation course that said first conduction is connected, and each in said a plurality of secondary signal buses comprises second insulation course that is formed on first conductive layer, be formed at least one second conduction on first conductive layer connects and be formed on the 3rd insulation course in the second conduction connection.
25, OLED panel according to claim 24, wherein said first and second conductions connect to be made by a kind of conductive material at least.
26, OLED panel according to claim 25, wherein conductive material is a kind of of metal, alloy and conducting polymer at least.
27, OLED panel according to claim 26, wherein metal is a kind of in aluminium, copper, nickel, chromium, silver and the gold.
28, OLED panel according to claim 24, wherein at least one first conduction connects with whole first limit of the first corresponding conductive layer and connects, and whole first limit connection of the second conduction connection and corresponding second conductive layer.
29, OLED panel according to claim 24, wherein, when having for each first signal bus when connecting more than one first conduction, first insulation course just makes the first adjacent conduction connect insulation, and when having for each secondary signal bus when connecting more than one second conduction, said the 3rd insulation course just makes the second adjacent conduction connect insulation.
30, OLED panel according to claim 29, one of first and second wherein adjacent at least conduction connections are vertically stacked.
31, a kind of method of making organic electroluminescent display panel, it comprises the steps:
The array way of arranging with row and column on substrate forms a plurality of first electrodes, each first electrode electrically insulated from one another;
The direction of edge row forms a plurality of first signal buses and is coupled with corresponding first electrode between the first adjacent electrode;
Follow direction and form a plurality of secondary signal buses, and give prominence to from substrate isolator, be used for exposing respectively the part of at least the first electrode;
At least form one of described first organic function layer, second organic function layer and the 3rd organic function layer on the part that described first electrode exposes, each described first organic function layer, second organic function layer and the 3rd organic function layer comprise a kind of organic electroluminescent medium at least; And
Be formed at least one top of said first, second and the 3rd organic function layer and with a plurality of second electrodes of corresponding secondary signal bus coupling.
32, method according to claim 31 wherein has at least corresponding end that one second conduction connects to be coupled with corresponding second electrode by the opening that is formed in corresponding first, second and the 3rd organic function layer.
33, method according to claim 32, wherein corresponding end has one to be connected vertical and bus electrode that form with second conduction basically.
34, method according to claim 33, wherein said first conductive layer is rectangular substantially, and corresponding first conductive layer in corresponding daughter board is included in a plurality of cuttings on rectangular substantially one side.
35, method according to claim 34, its median generatrix electrode stretches into the zone that is limited by corresponding cutting.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7239083B2 (en) | 1999-10-26 | 2007-07-03 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device with active matrix type EL display |
| CN111710312A (en) * | 2020-07-06 | 2020-09-25 | 北京显芯科技有限公司 | Drive circuit, LCD display screen and electronic equipment |
-
1998
- 1998-08-18 CN CNB981183956A patent/CN1177305C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7239083B2 (en) | 1999-10-26 | 2007-07-03 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device with active matrix type EL display |
| US7986094B2 (en) | 1999-10-26 | 2011-07-26 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device with active matrix EL display |
| US8390190B2 (en) | 1999-10-26 | 2013-03-05 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device with active matrix EL display |
| US8933624B2 (en) | 1999-10-26 | 2015-01-13 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
| CN111710312A (en) * | 2020-07-06 | 2020-09-25 | 北京显芯科技有限公司 | Drive circuit, LCD display screen and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177305C (en) | 2004-11-24 |
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