CN100411222C - Manufacturing method and structure of organic luminous display panel - Google Patents
Manufacturing method and structure of organic luminous display panel Download PDFInfo
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- CN100411222C CN100411222C CNB2004100050312A CN200410005031A CN100411222C CN 100411222 C CN100411222 C CN 100411222C CN B2004100050312 A CNB2004100050312 A CN B2004100050312A CN 200410005031 A CN200410005031 A CN 200410005031A CN 100411222 C CN100411222 C CN 100411222C
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- organic electroluminescence
- electroluminescence display
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000005401 electroluminescence Methods 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 32
- 238000000926 separation method Methods 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 18
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 239000004642 Polyimide Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920001568 phenolic resin Polymers 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 229920002120 photoresistant polymer Polymers 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 3
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- 230000007547 defect Effects 0.000 abstract 1
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- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
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Abstract
The present invention relates to a manufacturing method and a structure for an organic luminous display panel. Figure setting is used for reducing the area covered by a transparent electrode on a pixel area without luminescence on the panel so as to enable the anode and the cathode of an organic light emitting diode to be respectively communicated with a transparent electrode and a metal electrode and partially have the performance of the organic light emitting diode. The pixel area without luminescence of electric isolation is changed to have the property of the pixel area providing a capacitance value in data circuit charging. Thus, the luminous condition of the panel is uniform, and the bright line defect of the panel is effectively improved.
Description
Technical field
The present invention relates to a kind of method and structure of making organic electroluminescence display panel, particularly a kind of method and structure of improving organic electroluminescence display panel bright line problem.
Background technology
In recent years, in the industry of flat-panel screens, organic light emitting display (Organic Light EmittingDiode; OLED), and attracted attention gradually because of having self-luminosity, high brightness, super wide viewing angle, high reaction speed, low driving voltage and advantage such as in light weight.But the organic light emitting display occupation rate on market at present is still limited, therefore, each big display is made factory and all is devoted to look for best manufacture method, and to improve production qualification rate and product performance, expectation can impel organic light emitting display early in reaching universalness on the market.
In the existing organic electroluminescence display panel product, be generally and separate adjacent pixels, can use the design of electrode separation bar (electrode separation rib), electrode separation bar and basalis that utilization has insulation characterisitic are formed at not light emitting pixel district, to reach the purpose of distinguishing with pixel region.
As shown in Figure 1, usually on display floater, except main viewing area (main panel) 100, periphery in main viewing area 100, have the viewing area of part specific image 102, zone 104 beyond in specific image 102 viewing areas then is all not light emitting pixel district, simultaneously the circuit by main viewing area be connected state by main viewing area with the circuit of exterior domain.Yet because these are positioned at the existence in not light emitting pixel district of 102 of the specific images of main viewing area 100 peripheries, in the time of will forming drive current by panel, having the part circuit is the difference in the not light emitting pixel district (zone 104) through main viewing area 100 peripheries for process specific image 102 viewing areas and part circuit.
The structural design in above-mentioned specific image 102 viewing areas and light emitting pixel district is not distinguished pixel region 240 and light emitting pixel district 250 not with the basalis 220 of insulation and electrode separation bar 230 then as shown in Figure 2 on substrate 200 and anode metal sull 210.Wherein pixel region 240 is the position of specific image 102 viewing areas among Fig. 1, and light emitting pixel district 250 then is not the position in other zone 104 outside specific image 102 viewing areas.
In light emitting pixel district 250 not, because dielectric base layer 220 is arranged is isolated the anode metal sull 210 of connected state with cathodic metal layer 270, therefore when switching on the driving panel, do not have electric current and pass through this not light emitting pixel district 250, so the luminescent material storehouse 260 in light emitting pixel district 250 not can be not luminous, do not have the characteristic of light-emitting diode.
If observe, as shown in Figure 3, be the partial array structure chart of an organic electroluminescence display panel with a simple panel array structure.Wherein a not light emitting pixel district (as the not light emitting pixel district 250 of Fig. 2) that is arranged in the specific image periphery is promptly represented in zone 360, other zone 310 that drives with circuit 311, the zone 320 that drives with circuit 322, and 330 in the zone that drives with circuit 333 is all pixel region, and light emitting pixel zone 360 is not communicated with by circuit 333 simultaneously with pixel region 330.
As mentioned above, with regard to an organic electroluminescence display panel, the light emitting pixel zone position does not have electric current and passes through, so when with a fixed current 350 driver circuits, have identical electric current simultaneously by circuit 311, circuit 322 and circuit 333.But, and make that the capacitance summation when electric current passes through circuit 333 is little compared to circuit 311 and circuit 322 because there is the existence of dielectric base layer in zone 360.
Since during pixel drive, the circuit 333 less for capacitance, and its voltage rise time is shorter, therefore, generally speaking, when utilizing a current drives with some bright pixel, the higher phenomenon of brightness (brightness) will appear in the pixel region with circuit 333 processes of smaller capacitive value.So in Fig. 3, the luminous display brightness of the pixel region 330 that data circuit 333 passes through will be than pixel region 310 and pixel region 320 height.
Therefore, by above-mentioned phenomenon as can be known, when with a current drives one organic electroluminescence display panel, when just being the not light emitting pixel district that passes through between the specific image of panel periphery as if a communication line, then this circuit will have the capacitance little than other circuit.So concerning the main viewing area of an organic electroluminescence display panel, the viewing area that every link tester with smaller capacitive value is crossed all has the higher phenomenon of brightness and occurs, thereby has caused the panel finished product that the defective of bright line is arranged.
So, a kind ofly do not influence original basic processing procedure and type of drive, and can improve the organic electroluminescence display panel manufacture method and the structure of above-mentioned panel bright line problem, just have suitable exigence.
Summary of the invention
Purpose of the present invention is for providing a kind of manufacture method and structure of improving the bright line problem of organic electroluminescence display panel.The not light emitting pixel district that utilization is fully electrically isolated with the script of specific image periphery is made into and has the characteristic that part electrically communicates.Therefore, these can not provide required capacitance by the circuit on it to one in the light emitting pixel district yet.So, can make by these capacitances that circuit had in light emitting pixel district not, not by these capacitances that circuit had in light emitting pixel district not, difference to each other reduces compared to other.Thereby, make comparatively homogeneous of the luminous situation of panel, effectively improve the bright line defective of panel.
According to above-mentioned purpose, the present invention discloses a kind of manufacture method and structure of organic electroluminescence display panel.Utilize the basalis area in the not light emitting pixel district that reduces the specific image periphery, separate the pixel luminous zone to form basalis and electrode separation bar, and among the basalis of light emitting pixel zone position not, design a plurality of openings, with the exposed portions serve transparency electrode, and reduce the area that transparency electrode is capped.Then, the storehouse of luminous organic material and cathodic metal layer just can pass through these openings, and also can be connected to some extent with the transparency electrode part in light emitting pixel zone position not, and making not, the light emitting pixel district still can partly have the characteristic of Organic Light Emitting Diode.
The manufacture method of above-mentioned organic electroluminescence display panel comprises at least: form a transparency electrode on a substrate; Be coated with a basalis on this transparency electrode, wherein this basalis is made of insulating material; This basalis of patterning to be forming light emitting pixel district and light emitting pixel district not, and this not this basalis in light emitting pixel district comprise single opening or a plurality of opening, to expose this transparency electrode in this single opening or this a plurality of openings; Form an electrode separation bar on this basalis of part; Evaporation one luminescent material is stacked on this transparency electrode and this electrode separation bar and among this single opening or this a plurality of openings, wherein this luminescent material storehouse is electrically connected at this transparency electrode; And evaporation one first metal electrode is on this luminescent material storehouse, and wherein this first metal electrode is electrically connected at this luminescent material storehouse.
The structure of above-mentioned organic electroluminescence display panel comprises at least: a transparency carrier; One transparent anode electrode is positioned on this transparency carrier; One basalis, be positioned on this transparent anode electrode in light emitting pixel district not, wherein have a single opening or a plurality of opening on this basalis, and those light emitting pixel districts not that this single opening or this a plurality of openings are arranged in this organic electroluminescence display panel, so that the light emitting pixel district is not in this single opening or this transparent anode electrode of a plurality of opening exposed portions serve at those, wherein this basalis is made of insulating material; One electrode separation bar is positioned at those not on this basalis in light emitting pixel district; One luminescent material storehouse is positioned on this transparent anode electrode and this electrode separation bar and among this single opening or this a plurality of openings, and is electrically connected at this transparent anode electrode; And a cathodic metal electrode, be positioned on this luminescent material storehouse, and be electrically connected at this luminescent material storehouse.
So, with making fully electrically isolated originally not light emitting pixel district, change the capacitance in the time of also line charging can being provided into.
According to method of the present invention, can not change under the condition of original processing procedure fully, reach the purpose of improving the bright line problem.
Description of drawings
For above-mentioned feature of the present invention, method, purpose and advantage can be become apparent, conjunction with figs. is illustrated as follows:
Fig. 1 is the viewing area distribution schematic diagram of an organic electroluminescence display panel;
Fig. 2 is the specific image and the peripheral not structure cross sectional representation of light emitting pixel zone position of organic electroluminescence display panel in the known technology;
Fig. 3 is the partial array structural representation of organic electroluminescence display panel in the known technology;
Fig. 4 A～4B is the cross sectional representation of organic electroluminescence display panel manufacturing process of the present invention; And
Fig. 5 is the partial array structural representation that utilizes organic electroluminescence display panel of the present invention.
Wherein, description of reference numerals is as follows:
100: main viewing area
102: specific image
104,480: the zone
200,400: substrate
210,410: the anode metal sull
220,420: basalis
230,450: the electrode separation bar
240: pixel region
250,430: light emitting pixel district not
260,460: the luminescent material storehouse
270,470: the cathodic metal layer
310,320,330,360,530: the zone
311,322,333,511,522,533: circuit
350,540: electric current
440: opening
Embodiment
The present invention is a kind of setting that improves because of the not light emitting pixel district of specific image periphery on the panel, and causes the manufacture method and the structure of the organic electroluminescence display panel of panel bright line problem.By reducing the position area that basalis occupied, reducing the area that transparency electrode is capped, and make the part negative electrode electric conducting material in the light emitting pixel district not can be fully by not isolated, and can electric current by the time partition capacitance value is provided.
So, the circuit in the not light emitting pixel district by the specific image periphery is originally had lower capacitance improved, and the otherness of the capacitance that each circuit is had each other on the panel is reduced.So the Luminance Distribution of panel is more even, the bright line problem is improved.
Below will method of the present invention be described in detail with a preferred embodiment.
With reference to Fig. 4 A～4B, Fig. 4 A～4B is the cross sectional representation of organic electroluminescence display panel manufacturing process of the present invention.
With reference to Fig. 4 A, at first on substrate 400, make anode metal sull 410 as transparency electrode, and with gold-tinted development setting figure, wherein substrate 400 is constituted by transparent material, for example be glass, plastics, anode metal sull 410 then uses transparent conductive material, for example indium tin oxide (ITO) or indium-zinc oxide (IZO).Then be coated with last layer basalis 420, material is selected for use and is that insulating material, this insulating material for example can be positive photoresistance or negative photoresist, or is phenolic resins (Novolak), polyimides (Polyimide; PI), epoxy resin (epoxy) or acrylic resin (Acrylic resin) etc., and develop with gold-tinted and to set figure.
The figure of basalis 420 is set, except setting out not light emitting pixel district 430, the manufacture method of organic electroluminescence display panel of the present invention will be not yet basalis 420 figures in the light emitting pixel district 430, be designed to have an opening 440, and expose anode metal sull 410, shown in Fig. 4 A.
Then, coating one deck insulating material is as electrode separation bar 450, this insulating material equally for example can be positive photoresistance or negative photoresist, or is phenolic resins, polyimides, epoxy resin or acrylic resin etc., and forms a up big and down small special construction figure with the gold-tinted development.
Then,, make the luminescent material storehouse 460 and cathodic metal layer 470 that the multilayer luminous organic material is constituted successively, lay respectively on anode metal sull 410, the electrode separation bar 450 in the evaporation mode with reference to Fig. 4 B, and among the opening 440.The organic light emission material that wherein includes fluorescence or phosphorescence in the luminescent material storehouse 460, and organic or inorganic materials such as hole/electronics injection and hole/electric transmission.Cathodic metal then uses the good metal of conductivity, for example: aluminium (Al), silver-colored magnesium alloy (AgMg) or lithium-aluminium alloy (LiAl) etc.
Because the design of the structure graph of basalis 420, the original position area that the basalis 420 of existing making is occupied reduces.Utilize the figure of opening 440 to set, basalis 420 occupies whole not light emitting pixel district 430 originally, is reduced to and only occupies zone 480.
And in opening 440 positions, then because have luminescent material storehouse 460 and cathodic metal layer 470 on anode metal sull 410, to be electrical connected.So when the current drives assembly, electric current is during by light emitting pixel district 430 not, also can be by the design of opening 440, and by the part of the opening 440 in light emitting pixel district 430 not.Therefore, the light emitting pixel district can partly not have the characteristic of light-emitting diode, and can provide the partition capacitance value by the circuit on it to one.In addition, though fully electrically isolated originally not light emitting pixel district 430, the situation that has part electrically communicate according to the inventive method occurs, but the drive controlling by sweep circuit (scan line), still can keep the state that opening 440 positions in light emitting pixel district 430 not present not luminous demonstration.
With reference to Fig. 5, Fig. 5 is the partial array structure chart that utilizes the organic electroluminescence display panel that the present invention makes.Wherein zone 530 is a not light emitting pixel district that has basalis to exist, and other zone then is a pixel region.When driving the assembly that the present invention make with an electric current 540, though in 530 positions, light emitting pixel zone not the existence of basalis is arranged, because of the isolated electrical zone of exposed portions serve among the present invention, so also can provide the partition capacitance value to the circuit that passes through.And make a capacitance that is had by the circuit 533 in light emitting pixel zone 530 not, compared to other capacitance of being had of the circuit 522 by light emitting pixel zone 530 not and circuit 511 not, otherness reduces each other.
So, can allow the capacitance size that each circuit has on the display floater more average, then the situation of electric current by each circuit homogeneous more.Therefore, can not cause the luminous degree varies of the pixel region that each link tester is crossed and cause the panel luminance inequality, cause the problem of bright line.
Though the present invention discloses as above with embodiment; right its is not in order to qualification the present invention, any those of ordinary skill in the art, without departing from the spirit and scope of the present invention; when can doing various changes and modification, so protection scope of the present invention defines and is as the criterion when looking claim.
Claims (26)
1. the manufacture method of an organic electroluminescence display panel comprises:
Form a transparency electrode on a substrate;
Be coated with a basalis on this transparency electrode, wherein this basalis is made of insulating material;
This basalis of patterning to be forming light emitting pixel district and light emitting pixel district not, and this not this basalis in light emitting pixel district comprise single opening or a plurality of opening, to expose this transparency electrode in this single opening or this a plurality of openings;
Form an electrode separation bar on this basalis of part;
Evaporation one luminescent material is stacked on this transparency electrode and this electrode separation bar and among this single opening or this a plurality of openings, wherein this luminescent material storehouse is electrically connected at this transparency electrode; And
Evaporation one first metal electrode is on this luminescent material storehouse, and wherein this first metal electrode is electrically connected at this luminescent material storehouse.
2. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned transparency electrode is an anode electrode.
3. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that the material of above-mentioned transparency electrode comprises indium tin oxide or indium-zinc oxide.
4. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned insulating material is positive photoresistance or negative photoresist.
5. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned insulating material comprises a kind of in phenolic resins, polyimides, epoxy resin and the acrylic resin.
6. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned basalis is positioned at the periphery light emitting pixel zone not beyond the main viewing area of this organic electroluminescence display panel.
7. the manufacture method of organic electroluminescence display panel as claimed in claim 6 is characterized in that not this basalis on the light emitting pixel zone of this periphery that above-mentioned this single opening or this a plurality of openings are arranged in this organic electroluminescence display panel.
8. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned electrode separation bar is made of insulating material.
9. the manufacture method of organic electroluminescence display panel as claimed in claim 8 is characterized in that above-mentioned insulating material is positive photoresistance or negative photoresist.
10. the manufacture method of organic electroluminescence display panel as claimed in claim 8 is characterized in that above-mentioned insulating material comprises a kind of in phenolic resins, polyimides, epoxy resin and the acrylic resin.
11. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned luminescent material storehouse comprises fluorescence organic luminescent substance or phosphorescence organic luminescent substance.
12. the manufacture method of organic electroluminescence display panel as claimed in claim 11, it is characterized in that above-mentioned luminescent material storehouse also comprise in hole injected material, hole transport material, electronics injected material and the electric transmission material partly or entirely.
13. the manufacture method of organic electroluminescence display panel as claimed in claim 1 is characterized in that above-mentioned first metal electrode is a metallic cathode.
14. the manufacture method of organic electroluminescence display panel as claimed in claim 13, wherein above-mentioned metallic cathode is made of aluminium, silver-colored magnesium alloy, lithium-aluminium alloy or other metal material.
15. an organic electroluminescence display panel structure comprises at least:
One transparency carrier;
One transparent anode electrode is positioned on this transparency carrier;
One basalis, be positioned on this transparent anode electrode in light emitting pixel district not, wherein have single opening or a plurality of opening on this basalis, and this light emitting pixel district not that this single opening or this a plurality of openings are arranged in this organic electroluminescence display panel, so that the light emitting pixel district is not in this single opening or this this transparent anode electrode of a plurality of opening exposed portions serve at this, wherein this basalis is made of insulating material;
One electrode separation bar is positioned at this not on this basalis in light emitting pixel district;
One luminescent material storehouse is positioned on this transparent anode electrode and this electrode separation bar and among this single opening or this a plurality of openings, and is electrically connected at this transparent anode electrode; And
One cathodic metal electrode is positioned on this luminescent material storehouse, and is electrically connected at this luminescent material storehouse.
16. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that the material of above-mentioned transparent anode electrode comprises indium tin oxide or indium-zinc oxide.
17. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned insulating material is positive photoresistance or negative photoresist.
18. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned insulating material comprises a kind of in phenolic resins, polyimides, epoxy resin and the acrylic resin.
19. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned electrode separation bar is made of insulating material.
20. organic electroluminescence display panel structure as claimed in claim 19 is characterized in that above-mentioned insulating material is positive photoresistance or negative photoresist.
21. organic electroluminescence display panel structure as claimed in claim 19 is characterized in that above-mentioned insulating material comprises a kind of in phenolic resins, polyimides, epoxy resin and the acrylic resin.
22. organic electroluminescence display panel structure as claimed in claim 15, it is characterized in that this not the light emitting pixel district for comprising this basalis, this electrode separation bar and this single opening or this a plurality of openings.
23. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned luminescent material storehouse comprises fluorescence organic luminescent substance or phosphorescence organic luminescent substance.
24. organic electroluminescence display panel structure as claimed in claim 23, it is characterized in that above-mentioned luminescent material storehouse also comprise in hole injected material, hole transport material, electronics injected material and the electric transmission material partly or entirely.
25. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned cathodic metal electrode also is positioned among this single opening or this a plurality of openings.
26. organic electroluminescence display panel structure as claimed in claim 15 is characterized in that above-mentioned cathodic metal electrode is made of aluminium, silver-colored magnesium alloy, lithium-aluminium alloy or other metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100050312A CN100411222C (en) | 2004-02-16 | 2004-02-16 | Manufacturing method and structure of organic luminous display panel |
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| CNB2004100050312A CN100411222C (en) | 2004-02-16 | 2004-02-16 | Manufacturing method and structure of organic luminous display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300105A (en) * | 1999-12-15 | 2001-06-20 | 株式会社半导体能源研究所 | Electroluminescent display device |
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| CN1300105A (en) * | 1999-12-15 | 2001-06-20 | 株式会社半导体能源研究所 | Electroluminescent display device |
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