CN203746914U - OLED displayer - Google Patents
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- CN203746914U CN203746914U CN201420143347.7U CN201420143347U CN203746914U CN 203746914 U CN203746914 U CN 203746914U CN 201420143347 U CN201420143347 U CN 201420143347U CN 203746914 U CN203746914 U CN 203746914U
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Abstract
An embodiment of the utility model provides an OLED displayer and relates to the technical field of display. The resolution of the OLED displayer can be improved. The OLED displayer comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit which are arranged on an underlayer substrate and are in periodicity arrangement. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit respectively comprise an anode, a cathode and an organic material function layer. The organic material function layer comprises a light-emitting layer. The first light-emitting unit comprises a first light-emitting layer and the first light-emitting layer extends to the second light-emitting unit. The third light-emitting unit comprises a second light-emitting layer and the second light-emitting layer extends to the second light-emitting unit. In the second light-emitting unit, the first light-emitting layer and the second light-emitting layer are overlapped fully, and only one light-emitting layer in the second light-emitting unit emits light. In one of the light-emitting units which have the same light-emitting layers and emit light, a light color conversion layer arranged at the light emitting side is also provided. The OLED displayer is used for the high-resolution OLED displayer and the manufacture thereof.
Description
Technical field
The utility model relates to Display Technique field, relates in particular to a kind of OLED display.
Background technology
The advantages such as Organic Light Emitting Diode (Organic Light Emitting Diode is called for short OLED) is a kind of organic thin film electroluminescent display, and it has, and preparation technology is simple, cost is low, easily form flexible structure, visual angle is wide; Therefore, utilize the Display Technique of Organic Light Emitting Diode to become a kind of important Display Technique.
Wherein, utilizing luminescent material independently luminous is the mode that adopts at present maximum full colors that realizes OLED to show, it is mainly to utilize accurate metal shadow mask and pixel technique of counterpoint, prepares red, green, blue luminescent layer by evaporation coating method.
But, be limited to the precision of metal shadow mask dimension of picture, make the restricted restriction of resolution of the OLED display of preparing by said method.
Utility model content
Embodiment of the present utility model provides a kind of OLED display, can improve the resolution of OLED display.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
On the one hand, provide a kind of OLED display, comprising: underlay substrate, is arranged on described underlay substrate and is the first luminescence unit, the second luminescence unit and the 3rd luminescence unit of periodically arranging; Described the first luminescence unit, described the second luminescence unit, described the 3rd luminescence unit include anode, negative electrode and the organic material functional layer between described anode and described negative electrode, and described organic material functional layer comprises luminescent layer;
Wherein, described the first luminescence unit comprises the first luminescent layer, and described the first luminescent layer extends to described the second luminescence unit; Described the 3rd luminescence unit comprises the second luminescent layer, and described the second luminescent layer extends to described the second luminescence unit; In described the second luminescence unit, described the first luminescent layer and described the second luminescent layer are completely overlapping, and described the second luminescence unit only has a luminescent layer luminous;
Thering is identical luminescent layer and all in luminous one of them luminescence unit, also comprise the Color Conversion layer that is arranged on bright dipping side.
Preferably, described the first luminescent layer and described the second luminescent layer green light emitting layer and blue light-emitting layer each other; Described Color Conversion layer is for being converted to ruddiness by green glow or blue light.
Further preferred, described the second luminescent layer in described the second luminescence unit is luminous, and described the second luminescent layer is green light emitting layer;
Described Color Conversion layer is arranged on the bright dipping side of organic material functional layer described in described the second luminescence unit or described the 3rd luminescence unit.
Preferably, described OLED display also comprises and being arranged in described the first luminescence unit and described the second luminescence unit or described the second luminescence unit and described the 3rd luminescence unit, and barrier layer between the first luminescent layer and described the second luminescent layer; Described barrier layer is at the second luminescence unit, stops that the electronics or the hole that are injected into one of them luminescent layer inject another luminescent layer.
Based on above-mentioned, optional, described OLED display also comprises thin-film transistor; Wherein, the drain electrode of described thin-film transistor is electrically connected with described anode, and relatively described thin-film transistor, and described anode is near described thin-film transistor setting.
Further alternative, be transparent material at the material of described anode, and in the material of the described negative electrode situation that is opaque material, described photochromic conversion coating is arranged between described anode and described underlay substrate.
Optionally, be transparent material at the material of described negative electrode, and in the material of the described anode situation that is opaque material, described photochromic conversion coating is arranged on described negative electrode away from described underlay substrate one side.
Optionally, be transparent material at the material of described anode and described negative electrode, described photochromic conversion coating be separately positioned between described anode and described underlay substrate and described negative electrode away from described underlay substrate one side.
The utility model embodiment provides a kind of OLED display, and this OLED display comprises underlay substrate, is arranged on described underlay substrate and is the first luminescence unit, the second luminescence unit and the 3rd luminescence unit of periodically arranging; Described the first luminescence unit, described the second luminescence unit, described the 3rd luminescence unit include anode, negative electrode and the organic material functional layer between described anode and described negative electrode, and described organic material functional layer comprises luminescent layer; Wherein, described the first luminescence unit comprises the first luminescent layer, and described the first luminescent layer extends to described the second luminescence unit; Described the 3rd luminescence unit comprises the second luminescent layer, and described the second luminescent layer extends to described the second luminescence unit; In described the second luminescence unit, described the first luminescent layer and described the second luminescent layer are completely overlapping, and described the second luminescence unit only has a luminescent layer luminous; Thering is identical luminescent layer and all in luminous one of them luminescence unit, also comprise the Color Conversion layer that is arranged on bright dipping side.
By form the first luminescent layer in the first luminescence unit and the second luminescence unit simultaneously, in described the second luminescence unit and described the 3rd luminescence unit, form the second luminescent layer simultaneously, in the second luminescence unit, make the first luminescent layer and the second luminescent layer completely overlapping, the second luminescent layer that just can control in the first luminescent layer in the first luminescent layer, the second luminescence unit in the first luminescence unit or the second luminescent layer, the 3rd luminescence unit carries out luminous; On this basis by controlling the position of Color Conversion layer, just can make that the first luminescence unit, the second luminescence unit and the 3rd luminescence unit turn blue respectively, the light of wherein a kind of color in green, red; Like this, with respect to prior art, when the utility model embodiment can avoid preparing in each luminescence unit luminescent layer, because the restriction of metal shadow mask dimension of picture precision causes the problem that OLED monitor resolution is not high, make the OLED display that the utility model embodiment provides there is higher resolution.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation one of a kind of OLED display that Fig. 1 provides for the utility model embodiment;
The structural representation two of a kind of OLED display that Fig. 2 provides for the utility model embodiment;
The structural representation three of a kind of OLED display that Fig. 3 provides for the utility model embodiment;
The structural representation one of a kind of OLED display that comprises barrier layer that Fig. 4 provides for the utility model embodiment;
The structural representation two of a kind of OLED display that comprises barrier layer that Fig. 5 provides for the utility model embodiment;
The structural representation of a kind of end light emitting-type OLED display that comprises thin-film transistor that Fig. 6 provides for utility model embodiment;
The structural representation of a kind of top light emitting-type OLED display that comprises thin-film transistor that Fig. 7 provides for utility model embodiment;
The structural representation of a kind of dual-side luminescent type OLED display that comprises thin-film transistor that Fig. 8 provides for utility model embodiment.
Reference numeral:
01-OLED display; 10-underlay substrate; 20-the first luminescence unit; 30-the second luminescence unit; 40-the 3rd luminescence unit; 50-encapsulated layer; 60-thin-film transistor; 201-anode; 202-negative electrode; 203-the first luminescent layer; 204-the second luminescent layer; 205-Color Conversion layer; 206-electron transfer layer; 207-hole transmission layer; 208-barrier layer; 601-grid; 602-gate insulation layer; 603-semiconductor active layer; 604-source electrode; 605-drain electrode.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of OLED display 01, as shown in Figure 1 to Figure 3, this OLED display 01 comprises: underlay substrate 10, is arranged on described underlay substrate and is the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40 of periodically arranging; Described the first luminescence unit 20, described the second luminescence unit 30, described the 3rd luminescence unit 40 include anode 201, negative electrode 202 and the organic material functional layer between described anode 201 and described negative electrode 202, and described organic material functional layer comprises luminescent layer.
Wherein, described the first luminescence unit 20 comprises the first luminescent layer 203, and described the first luminescent layer 203 extends to described the second luminescence unit 30; Described the 3rd luminescence unit 40 comprises described the second luminescent layer 204, and described the second luminescent layer 204 extends to described the second luminescence unit 30; In described the second luminescence unit 30, described the first luminescent layer 203 and described the second luminescent layer 204 are completely overlapping, and described the second luminescence unit 30 only has a luminescent layer luminous; Thering is identical luminescent layer and all in luminous one of them luminescence unit, also comprise the Color Conversion layer 205 that is arranged on bright dipping side.
Described organic material functional layer is for making each luminescence unit of described OLED display 01 luminous; Based on this, described organic material functional layer, except comprising luminescent layer, can also comprise electron transfer layer 206 and hole transmission layer 207; Further, inject the efficiency of luminescent layer in order to improve electronics and hole, described organic material functional layer can also comprise the electron injecting layer being arranged between described negative electrode 202 and described electron transfer layer 206, and is arranged on the hole injection layer between described anode 201 and described hole transmission layer 207.
In the time that the described anode 201 to described OLED display 01 and described negative electrode 202 apply operating voltage simultaneously, the electronics in hole and described negative electrode 202 in described anode 201 is all injected in described luminescent layer; Described hole and described electronics meet in described luminescent layer, and the two forms electron-hole pair and give off energy because the effect of Coulomb force is combined with each other; This energy sends with the form of light, is shown as the light of different colours, and penetrates uniformly from the both sides of described organic material functional layer through the different light emitting molecules in described luminescent layer.
It should be noted that, the first, described OLED display 01 can comprise multiple pixel cells of array arrangement, each described pixel cell all corresponding one group be the first luminescence unit 20, the second luminescence unit 30, the 3rd luminescence unit 40 of periodically arranging; And the one in described the first luminescence unit 20, the second luminescence unit 30, the 3rd luminescence unit 40 difference corresponding emitting red light unit, green emitting unit, blue-light-emitting unit, its concrete corresponding relation does not limit at this.
Based on this, because the second luminescence unit 30 comprises the first stacked luminescent layer 203 and the second luminescent layer 204, and based on structure of the present utility model, the first luminescent layer 203 and the second luminescent layer 204 certainly will be sent out the light of different colours, therefore, in the second luminescence unit 30, needing to control only allows one of them luminescent layer luminous, only allow the first luminescent layer 203 luminous or only allow the second luminescent layer 204 luminous, so just can avoid in the second luminescence unit 30 two luminescent layers simultaneously luminous and make the impure problem of color of sending.
On this basis, when the first luminescent layer 203 in the second luminescence unit 30 is when luminous, the light of 203 same colors of the first luminescent layer in itself and the first luminescence unit 20, therefore, the Color Conversion layer 205 that is positioned at the first luminescent layer 203 bright dipping sides need be set in the first luminescence unit 20 or the second luminescence unit 30, carry out color differentiating with the light that the first luminescence unit 20 and the second luminescence unit 30 are sent; When the second luminescent layer 204 in the second luminescence unit 30 is when luminous, the light of 204 same colors of the second luminescent layer in itself and the 3rd luminescence unit 40, therefore, the Color Conversion layer 205 that is positioned at the second luminescent layer 204 bright dipping sides need be set in the second luminescence unit 30 or the 3rd luminescence unit 40, carry out chromatic zones with the light that the second luminescence unit 30 and the 3rd luminescence unit 40 are sent.
Second, because described the first luminescence unit 20 and the second luminescence unit 30 include the first luminescent layer 203, therefore, in the time preparing described first luminescent layer 203 of organic material with vapour deposition method, can form this first luminescent layer 203 at the first luminescence unit 20 and the second luminescence unit 30 positions simultaneously, that is: in the utility model embodiment, the minimum precision using the scope of two adjacent the first luminescence units 20 and the second luminescence unit 30 as evaporation the first luminescent layer 203.
In like manner, because described the second luminescence unit 30 and the 3rd luminescence unit 40 include the second luminescent layer 204, therefore, minimum precision that can be using the scope of adjacent the second luminescence unit 30 and the 3rd luminescence unit 40 as evaporation the second luminescent layer 204.
Wherein, in the second luminescence unit 30, the first luminescent layer 203 and the second luminescent layer 204 are mutually stacked.
Example, in the time utilizing accurate at present metal shadow mask evaporation to prepare the first luminescent layer 203 and the second luminescent layer 204, the width of supposing its minimum precision is d, can first in the first luminescence unit 20 and the second luminescence unit 30, prepare the first luminescent layer 203 that width is d, that is: the first luminescence unit 20 comprises that width is that the first luminescent layer 203, the second luminescence units 30 of d/2 comprise that width is the first luminescent layer 203 of d/2; Then in the second luminescence unit 30 and the 3rd luminescence unit 40, prepare the second luminescent layer 204 that width is d, that is: the second luminescence unit 30 comprises that width is the second luminescent layer 204 of d/2, the 3rd luminescence unit 40 comprises that width is the second luminescent layer 204 of d/2, wherein, make the second luminescent layer 204 that the first luminescent layer 203 that in the second luminescence unit 30, width is d/2 and width are d/2 completely overlapping.
Like this, be all injected into described the first luminescent layer 203 by controlling hole in the anode 201 of the first luminescence unit 20 and the electronics in described negative electrode 202, just can make the such as blue light of light of 20 respective color of described the first luminescence unit; By controlling that the hole in the anode 201 of the second luminescence unit 30 and the electronics in described negative electrode 202 are all injected into for example the second luminescent layer 204(or can being also described the first luminescent layer 203), just can make the such as green glow of light of 30 respective color of described the second luminescence unit; All be injected into the second luminescent layer 204 by controlling hole in the anode 201 of the 3rd luminescence unit 40 and the electronics in described negative electrode 202, and be converted to the such as ruddiness of light of respective color in bright dipping one side by being arranged on the Color Conversion layer 205 of the 3rd luminescence unit 40.
Based on this, in the utility model embodiment, need to ensure that the width of Color Conversion layer 205 is d/2, seen from the above description, the minimum widith of metal shadow mask is d, thereby is that the photochromic conversion coating 205 of d/2 can not adopt vapour deposition method preparation preparing width.On this basis, consider that photoetching technique resolving capability in composition technique can reach 2 times of metal shadow mask resolution, that is: can prepare by photoetching technique the photochromic conversion coating 205 that width is d/2, thereby, in the utility model embodiment, adopt photoetching technique to prepare described photochromic conversion coating 205.
The 3rd, the material of described Color Conversion layer 205 is not limited, as required conversion color and determine.For example, while needing green glow to be converted to ruddiness, blue light and to be converted to ruddiness, select the corresponding material with this function.
The 4th, due to the particularity of organic material functional layer material, in the utility model embodiment, OLED display 01 also should comprise the encapsulated layer 50 for encapsulating organic material; Wherein, described encapsulated layer 50 can be that thin-film package can be also substrate package, does not limit at this.
The 5th, according to the difference of the material of described anode 201 and described negative electrode 202, can be divided into one side light emitting-type OLED display 01 and dual-side luminescent type OLED display 01.That is: in the time that the material of one of them electrode in described anode 201 and described negative electrode 202 is opaque material, described OLED display 01 is one side light emitting-type; In the time that the material of described anode 201 and described negative electrode 202 is transparent material, described OLED display 01 is dual-side luminescent type.
For one side light emitting-type OLED display 01, according to the difference of the material of described anode 201 and described negative electrode 202, can be divided into again top light emitting-type and end light emitting-type.Concrete, when described anode 201 arranges near described underlay substrate 10, described negative electrode 202 arranges away from described substrate base 10, and the material of described anode 201 is transparent conductive material, when the material of described negative electrode 202 is opaque electric conducting material, because light is from anode 201, again through substrate base 10 1 side outgoing, therefore, can be called end light emitting-type; When the material of described anode 201 is opaque electric conducting material, when the material of described negative electrode 202 is transparent conductive material, due to light from negative electrode 202, again through and encapsulated layer 50 outgoing that are oppositely arranged of substrate base 10, therefore, can be called top light emitting-type.Certainly, also the relative position of above-mentioned two kinds of anodes 201 and negative electrode 202 can be replaced, repeat again at this.
For dual-side luminescent type OLED display 01, when described anode 201 arranges near described substrate base 10, described negative electrode 202 arranges away from described substrate base 10, or arrange away from described substrate base 10 when described anode 201, described negative electrode 202 arranges near described substrate base 10, and the material of described anode 201 and described negative electrode 202 is for example ITO(Indium Tin Oxides of transparent conductive material, tin indium oxide) time, because light is on the one hand from anode 201, again through substrate base 10 1 side outgoing, on the other hand from negative electrode 202, encapsulated layer 50 outgoing through being oppositely arranged with substrate base 10 again, therefore can be called dual-side luminescent type.
The 6th, the accompanying drawing of all embodiment of the utility model all schematically shows the patterned layer relevant with inventive point, for not illustrating or only show part with the irrelevant patterned layer of inventive point.
The utility model embodiment provides a kind of OLED display 01, comprising: underlay substrate 10, is arranged on described underlay substrate and is the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40 of periodically arranging; Described the first luminescence unit 20, described the second luminescence unit 30, described the 3rd luminescence unit 40 include anode 201, negative electrode 202 and the organic material functional layer between described anode 201 and described negative electrode 202, and described organic material functional layer comprises luminescent layer.Wherein, described the first luminescence unit 20 comprises the first luminescent layer 203, and described the first luminescent layer 203 extends to described the second luminescence unit 30; Described the 3rd luminescence unit 40 comprises described the second luminescent layer 204, and described the second luminescent layer 204 extends to described the second luminescence unit 30; In described the second luminescence unit 30, described the first luminescent layer 203 and described the second luminescent layer 204 are completely overlapping, and described the second luminescence unit 30 only has a luminescent layer luminous; Thering is identical luminescent layer and all in luminous one of them luminescence unit, also comprise the Color Conversion layer 205 that is arranged on bright dipping side.
By form the first luminescent layer 203 in the first luminescence unit 20 and the second luminescence unit 30 simultaneously, in described the second luminescence unit 30 and described the 3rd luminescence unit 40, form the second luminescent layer 204 simultaneously, and in the second luminescence unit 30, make the first luminescent layer 203 and the second luminescent layer 204 completely overlapping, the second luminescent layer 204 that just can control in the first luminescent layer 203 in the first luminescent layer 203, the second luminescence unit 30 in the first luminescence unit 20 or the second luminescent layer 204, the 3rd luminescence unit 40 carries out luminous; On this basis by controlling the position of Color Conversion layer 205, just can make that the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40 turn blue respectively, the light of wherein a kind of color in green, red; Like this, with respect to prior art, when the utility model embodiment can avoid preparing in each luminescence unit luminescent layer, because the restriction of metal shadow mask dimension of picture precision causes the problem that OLED monitor resolution is not high, make the OLED display 01 that the utility model embodiment provides there is higher resolution.
Consider that the energy of green glow and blue light is higher than the energy of ruddiness, high-octane green glow or blue light are converted to low-energy ruddiness more easy, therefore, in the utility model embodiment, be preferably described the first luminescent layer 203 and described the second luminescent layer 204 green light emitting layer and blue light-emitting layer each other; Described Color Conversion layer 205 is for being converted to ruddiness by green glow or blue light.
Here, owing to only having a luminescent layer luminous in the second luminescence unit 30, therefore, can make the hole of anode 201 or the electronics of negative electrode 202 can not arrive for example the first luminescent layer 203 of one of them luminescent layer in the second luminescence unit 30 by controlling the carrier transmission characteristics of the first luminescent layer 203 and the second luminescent layer 204 and/or the relationship between energy levels between the two, thereby make this luminescent layer not luminous.
For example: if do not allow the first luminescent layer 203 in the second luminescence unit 30 luminous, the charge carrier characteristic that can control the first luminescent layer 203 is conducive to hole transport, can or seldom not stop and flow into the second luminescent layer 204 at the first luminescent layer 203 from anode 201 injected holes like this, in the second luminescent layer 204, be combined with electronics and be luminous in hole, in the first luminescent layer 203 because hole and electronics do not have combination, therefore can be not luminous.
In addition, also can realize above-mentioned effect by the design of energy level, concrete, can control the HOMO(HOMO highest occupied molecular orbital of the first luminescent layer 203 and the second luminescent layer 204) energy level is identical or very approaching, can or seldom not stop and flow into the second luminescent layer 204 at the first luminescent layer 203 from anode 201 injected holes like this, and control the LUMO(lowest unoccupied molecular orbital of the first luminescent layer 203 and the second luminescent layer 204) energy level differs greatly, make substantially to stop the second luminescent layer 204 from negative electrode 202 injected electrons, hole and electronics are only can be in the interior combination of the second luminescent layer 204 and luminous like this.
Can certainly realize in the second luminescence unit 30 luminescent layer by the collocation of above-mentioned two kinds luminous, another luminescent layer is not luminous.
It should be noted that, only work at anode 201 and negative electrode 202 simultaneously, and the electronics of the hole of anode 201 and negative electrode 202 all can inject in the situation of luminescent layer, each colour light emitting layer could be luminous normally, even if no person is called for example blue light-emitting layer by the first luminescent layer 203 here, if hole and electronics do not have combination in this blue light-emitting layer in the second luminescence unit 30, this blue light-emitting layer is also not irradiative so.
Further, consider in the current existing luminescent material for the preparation of OLED display, under normal circumstances, the efficiency of green light material is far above blue light material, therefore, the utility model embodiment is preferably, and only has described the second luminescent layer 204 luminous in described the second luminescence unit 30, and described the second luminescent layer 204 is green light emitting layer; In the case, described Color Conversion layer 205 can be arranged on the bright dipping side of organic material functional layer described in described the second luminescence unit 30 or described the 3rd luminescence unit 40.
Wherein, the material of described Color Conversion layer 205 can be the cyanine dye, 4 of 4-dicyano methylene-2-methyl-6-(p-dimethylamino styryl)-4H-pyrans (DCM-1), DCM-2, DCJTB and so on, 4-bis-fluoro-1,3,5,7-tetraphenyl-4-boron is assorted-3a, and the red and Nile red in 4a-diaza-s-indacene (s-indacene), road agate nearly (Lumogen) etc.
Preferably, as shown in Figures 4 and 5, described OLED display 01 also comprises and being arranged in described the first luminescence unit 20 and described the second luminescence unit 30 or described the second luminescence unit 30 and described the 3rd luminescence unit 40, and barrier layer 208 between the first luminescent layer 203 and described the second luminescent layer 204; Described barrier layer 208 is at the second luminescence unit 30, stops that the electronics or the hole that are injected into one of them luminescent layer inject another luminescent layer.
For example: as shown in Figure 4, when anode 201 is near underlay substrate 10, negative electrode 202 during away from underlay substrate 10, in the second luminescence unit 30, can control described barrier layer 208 and stop the electronics that is injected into the second luminescent layer 204 first luminescent layer 203 that reinjects, thereby make the first luminescent layer 203 in the second luminescence unit 30 owing to there is no the injection of electronics and not luminous; And for the hole that is injected into barrier layer 208, can arrive the second luminescent layer 204 by described barrier layer 208, thereby hole and electronics are met in the second luminescent layer 204 of the second luminescence unit 30 and luminous.
In the case, due to the second luminescence unit 30 and the 3rd luminescence unit 40 all luminous by the second luminescent layer 204, and according to displaying principle, need these two luminescence units to send out the light of different colours, therefore, need be taking the 3rd luminescence unit 40 as example in the second luminescence unit 30 or the 3rd luminescence unit 40(Fig. 4) the bright dipping side of the second luminescent layer 204, Color Conversion layer 205 is set.Wherein, due to the second luminescent layer 204 and be positioned at the particularity of the organic material such as electron transfer layer 206, hole transmission layer 207 of the second luminescent layer 204 both sides, described Color Conversion layer 205 is preferably arranged on the bright dipping side of organic material functional layer.
In like manner, as shown in Figure 5, when anode 201 is near underlay substrate 10, negative electrode 202 during away from underlay substrate 10, in the second luminescence unit 30, can control described barrier layer 208 and stop the hole that is injected into the first luminescent layer 203 second luminescent layer 204 that reinjects, thereby make the second luminescent layer 204 in the second luminescence unit 30 not luminous owing to not having cuniculate injection; And for the electronics that is injected into barrier layer 208, can arrive the first luminescent layer 203 by described barrier layer 208, thereby hole and electronics are met in the first luminescent layer 203 of the second luminescence unit 30 and luminous.
In the case, due to the first luminescence unit 20 and the second luminescence unit 30 all luminous by the first luminescent layer 203, and according to displaying principle, need these two luminescence units to send out the light of different colours, therefore, need be taking the first luminescence unit 20 as example in the second luminescence unit 30 or first luminescence unit 20(Fig. 5) the bright dipping side of the first luminescent layer 203, Color Conversion layer 205 is set.Wherein, due to the first luminescent layer 203 and be positioned at the particularity of the organic material such as electron transfer layer 206, hole transmission layer 207 of the first luminescent layer 203 both sides, described Color Conversion layer 205 is arranged on the bright dipping side of organic material functional layer.
Based on above-mentioned description, as shown in Figure 6, described OLED display 01 also comprises thin-film transistor 60; Wherein, described thin-film transistor 60 comprises grid 601, gate insulation layer 602, semiconductor active layer 603, source electrode 604 and drain electrode 605; The drain electrode 605 of described thin-film transistor 60 is electrically connected with described anode 201, and relatively described thin-film transistor 60, and described anode 201 arranges near described thin-film transistor 60.On this basis, described OLED display 01 also comprises the grid line, the grid line lead-in wire (not identifying in figure) that are electrically connected with described grid 601, the data wire, the data cable lead wire (not identifying in figure) etc. that are electrically connected with described source electrode 604.
It should be noted that, described thin-film transistor 60 is a kind of semiconductor units with switching characteristic, and it can be top gate type, can be also bottom gate type, in this no limit.
Except structure shown in Fig. 6, thin-film transistor 60 can also be arranged on base plate for packaging, and the drain electrode 605 of described thin-film transistor is electrically connected with the male or female of the luminescence unit on underlay substrate 10.
Further alternative, shown in figure 6, be transparent material at the material of described anode 201, and in the situation that the material of described negative electrode 202 is opaque material,, described OLED display 01 is end light emitting-type, and described photochromic conversion coating 205 is arranged between described anode 201 and described underlay substrate 10.
Or, optionally, as shown in Figure 7, be transparent material at the material of described negative electrode 202, and in the situation that the material of described anode 201 is opaque material, that is, described OLED display 01 is top light emitting-type, and described photochromic conversion coating 205 is arranged on described negative electrode 202 away from described underlay substrate 10 1 sides.
Or, optionally, as shown in Figure 8, material at described anode 201 and described negative electrode 202 is transparent material,, described OLED display 01 is dual-side luminescent type, described photochromic conversion coating 205 be separately positioned between described thin-film transistor 60 and described anode 201 and described negative electrode 202 away from described underlay substrate 10 1 sides.
It should be noted that, because anode 201 is discontinuous, in the utility model embodiment, pixel isolation layer can be set between adjacent anode 201, carry out on the one hand the isolation of luminescence unit, on the other hand the layer at anode 201 places is filled and led up, to facilitate the preparation of follow-up each functional layer.
The utility model embodiment provides a kind of OLED display, shown in 3, described OLED display 01 comprises: underlay substrate 10, is arranged on described underlay substrate and is the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40 of periodically arranging.Based on this structure, the preparation method of OLED display comprises: form described the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40, specifically comprise:
Position at described the first luminescence unit 20, described the second luminescence unit 30 and described the 3rd luminescence unit 40 forms the first electrode by composition technique; Wherein, described the first electrode can be anode 201, can be also negative electrode 202;
Be formed with on the substrate of described the first electrode, forming the first luminescent layer 203 in the position of described the first luminescence unit 20 and described the second luminescence unit 30 by evaporation process;
Be formed with on the substrate of described the first luminescent layer 203, forming the second luminescent layer 204 in the position of described the second luminescence unit 30 and described the 3rd luminescence unit 40 by evaporation process; Wherein, in the second luminescence unit 30, described the first luminescent layer 203 and described the second luminescent layer 204 are completely overlapping; And by rationally controlling the first luminescent layer 203 and the carrier transmission characteristics of the second luminescent layer 204 and/or the relationship between energy levels between the two, only allow in the second luminescence unit 30 the first luminescent layer 203 or described the second luminescent layer 204 luminous;
Be formed with on the substrate of described the second luminescent layer 204, forming the second electrode in the position of described the first luminescence unit 20, described the second luminescence unit 30 and described the 3rd luminescence unit 40 by composition technique; Wherein, in the situation that described the first electrode is anode 201, the second electrode is negative electrode 202, and in the situation that described the first electrode is negative electrode 202, the second electrode is anode 201;
Described method also comprises: having identical luminescent layer and all in luminous one of them luminescence unit, form the Color Conversion layer 205 that is positioned at bright dipping side by composition technique.
It should be noted that, the first, in the utility model embodiment, each luminescence unit, except forming luminescent layer, can also form the electron transfer layer 206 and the hole transmission layer 207 that are positioned at luminescent layer both sides; Further, inject the efficiency of luminescent layer in order to improve electronics and hole, can also form the electron injecting layer between negative electrode 202 and described electron transfer layer 206, and hole injection layer between anode 201 and described hole transmission layer 207; Wherein, these organic material layers that each luminescence unit comprises form organic material functional layer.
The second, the one in described the first luminescence unit 20, the second luminescence unit 30, the 3rd luminescence unit 40 difference corresponding emitting red light unit, green emitting unit, blue-light-emitting unit, its concrete corresponding relation does not limit at this.
Based on this, because the second luminescence unit 30 comprises the first stacked luminescent layer 203 and the second luminescent layer 204, and based on structure of the present utility model, the first luminescent layer 203 and the second luminescent layer 204 certainly will be sent out the light of different colours, therefore, in the second luminescence unit 30, needing to control only allows one of them luminescent layer luminous, only allow the first luminescent layer 203 luminous or only allow the second luminescent layer 204 luminous, so just can avoid in the second luminescence unit 30 two luminescent layers simultaneously luminous and make the impure problem of color of sending.
On this basis, when the first luminescent layer 203 in the second luminescence unit 30 is when luminous, the light of 203 same colors of the first luminescent layer in itself and the first luminescence unit 20, therefore, need in the first luminescence unit 20 or the second luminescence unit 30, form the Color Conversion layer 205 that is positioned at the first luminescent layer 203 bright dipping sides, carry out color differentiating with the light that the first luminescence unit 20 and the second luminescence unit 30 are sent; When the second luminescent layer 204 in the second luminescence unit 30 is when luminous, the light of 204 same colors of the second luminescent layer in itself and the 3rd luminescence unit 40, therefore, the Color Conversion layer 205 that is positioned at the second luminescent layer 204 bright dipping sides need be set in the second luminescence unit 30 or the 3rd luminescence unit 40, carry out chromatic zones with the light that the second luminescence unit 30 and the 3rd luminescence unit 40 are sent.
The 3rd, the step such as the composition technique in the utility model embodiment comprises film forming, gluing, exposure, development, etching, peel off.Evaporation process refers to by evaporation coating method and directly forms the pattern of given shape in specific region, the step such as do not need gluing, exposure, development, etching, peel off.
The utility model embodiment provides a kind of preparation method of OLED display, by form the first luminescent layer 203 in the position of the first luminescence unit 20 and the second luminescence unit 30 simultaneously, form the second luminescent layer 204 in the position of described the second luminescence unit 30 and described the 3rd luminescence unit 40 simultaneously, in the second luminescence unit 30, make the first luminescent layer 203 and the second luminescent layer 204 completely overlapping, just can control the first luminescent layer 203 in the first luminescence unit 20, the first luminescent layer 203 in the second luminescence unit 30 or the second luminescent layer 204, the second luminescent layer 204 in the 3rd luminescence unit 40 carries out luminous, on this basis by controlling the position of Color Conversion layer 205, just can make that the first luminescence unit 20, the second luminescence unit 30 and the 3rd luminescence unit 40 turn blue respectively, the light of wherein a kind of color in green, red, like this, with respect to prior art, when the utility model embodiment can avoid preparing in each luminescence unit luminescent layer, because the restriction of metal shadow mask dimensional accuracy causes the problem that OLED monitor resolution is not high, make the OLED display 01 that the utility model embodiment provides there is higher resolution.
Consider that the efficiency of green light material is far above blue light material, preferably, shown in 3, described the second luminescent layer 204 in described the second luminescence unit 30 is luminous, and described the second luminescent layer 204 is green light emitting layer, that is: the first luminescent layer 203 in the first luminescence unit 20 is blue light-emitting layer, and the second luminescent layer in the second luminescence unit 30 and the 3rd luminescence unit 40 is green light emitting layer, and the first luminescent layer 203 in the second luminescence unit 30 is not luminous; In the case, described Color Conversion layer 205 is formed on the bright dipping side of the organic material functional layer in described the second luminescence unit 30 or described the 3rd luminescence unit 40.
Preferably, shown in figure 4 and Fig. 5, after forming described the first luminescent layer 203, before forming described the second luminescent layer 204, described method also comprises:
Position at described the first luminescence unit 20 and described the second luminescence unit 30 or described the second luminescence unit 30 and described the 3rd luminescence unit 40 forms barrier layer 208 by evaporation process; Described barrier layer 208 is at the second luminescence unit 30, stops that the electronics or the hole that are injected into one of them luminescent layer inject another luminescent layer.
Like this, just can be controlled in the second luminescence unit 30 by forming described barrier layer 208, only allow one of them luminescent layer luminous.
For example: shown in figure 4, when anode 201 is near underlay substrate 10, negative electrode 202 during away from underlay substrate 10, in the second luminescence unit 30, can control described barrier layer 208 and stop the electronics that is injected into the second luminescent layer 204 first luminescent layer 203 that reinjects, thereby make the first luminescent layer 203 in the second luminescence unit 30 owing to there is no the injection of electronics and not luminous; And for the hole that is injected into barrier layer 208, can arrive the second luminescent layer 204 by described barrier layer 208, thereby hole and electronics are met in the second luminescent layer 204 of the second luminescence unit 30 and luminous.
In the case, due to the second luminescence unit 30 and the 3rd luminescence unit 40 all luminous by the second luminescent layer 204, and according to displaying principle, need these two luminescence units to send out the light of different colours, therefore, need be taking the 3rd luminescence unit 40 as example in the second luminescence unit 30 or the 3rd luminescence unit 40(Fig. 4) the bright dipping side of organic material functional layer, form Color Conversion layer 205.
In like manner, shown in figure 5, when anode 201 is near underlay substrate 10, negative electrode 202 during away from underlay substrate 10, in the second luminescence unit 30, can control described barrier layer 208 and stop the hole that is injected into the first luminescent layer 203 second luminescent layer 204 that reinjects, thereby make the second luminescent layer 204 in the second luminescence unit 30 not luminous owing to not having cuniculate injection; And for the electronics that is injected into barrier layer 208, can arrive the first luminescent layer 203 by described barrier layer 208, thereby hole and electronics are met in the first luminescent layer 203 of the second luminescence unit 30 and luminous.
In the case, due to the first luminescence unit 20 and the second luminescence unit 30 all luminous by the first luminescent layer 203, and according to displaying principle, need these two luminescence units to send out the light of different colours, therefore, need be taking the first luminescence unit 20 as example in the second luminescence unit 30 or first luminescence unit 20(Fig. 5) the bright dipping side of organic material functional layer, Color Conversion layer 205 is set.
Based on foregoing description, shown in figure 6 to 8, before forming described the first electrode, described method also comprises formation thin-film transistor 60; Be anode, the second electrode be negative electrode in the situation that at described the first electrode, the drain electrode of described thin-film transistor is electrically connected with described anode 201.
Wherein, described thin-film transistor 60 comprises grid 601, gate insulation layer 602, semiconductor active layer 603, source electrode 604 and drain electrode 605, the grid line being electrically connected with described grid 601, grid line lead-in wire (not identifying in figure), the data wire, the data cable lead wire (not identifying in figure) etc. that are electrically connected with described source electrode 604.
It should be noted that, described thin-film transistor 60 can be top gate type, can be also bottom gate type, in this no limit.
Further alternative, shown in figure 6, be transparent material at the material of described anode 201, and in the situation that the material of described negative electrode 202 is opaque material,, described OLED display 01 is end light emitting-type, and described photochromic conversion coating 205 is formed between described anode 201 and described underlay substrate 10.
Or, optionally, as shown in Figure 7, be transparent material at the material of described negative electrode 202, and in the situation that the material of described anode 201 is opaque material, that is, described OLED display 01 is top light emitting-type, and described photochromic conversion coating 205 is formed on described negative electrode 202 away from described underlay substrate 10 1 sides.
Or, optionally, as shown in Figure 8, material at described anode 201 and described negative electrode 202 is transparent material,, described OLED display 01 is dual-side luminescent type, described photochromic conversion coating 205 be respectively formed between described thin-film transistor 60 and described anode 201 and described negative electrode 202 away from described underlay substrate 10 1 sides.
It should be noted that, because anode 201 is discontinuous, in the utility model embodiment, can between adjacent anode 201, form pixel isolation layer, carry out on the one hand the isolation of luminescence unit, on the other hand the layer at anode 201 places is filled and led up, to facilitate the preparation of follow-up each functional layer.
The above; it is only embodiment of the present utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (8)
1. an OLED display, comprising: underlay substrate, is arranged on described underlay substrate and is the first luminescence unit, the second luminescence unit and the 3rd luminescence unit of periodically arranging; It is characterized in that,
Described the first luminescence unit, described the second luminescence unit, described the 3rd luminescence unit include anode, negative electrode and the organic material functional layer between described anode and described negative electrode, and described organic material functional layer comprises luminescent layer;
Wherein, described the first luminescence unit comprises the first luminescent layer, and described the first luminescent layer extends to described the second luminescence unit; Described the 3rd luminescence unit comprises the second luminescent layer, and described the second luminescent layer extends to described the second luminescence unit; In described the second luminescence unit, described the first luminescent layer and described the second luminescent layer are completely overlapping, and described the second luminescence unit only has a luminescent layer luminous;
Thering is identical luminescent layer and all in luminous one of them luminescence unit, also comprise the Color Conversion layer that is arranged on bright dipping side.
2. OLED display according to claim 1, is characterized in that, described the first luminescent layer and described the second luminescent layer green light emitting layer and blue light-emitting layer each other;
Described Color Conversion layer is for being converted to ruddiness by green glow or blue light.
3. OLED display according to claim 2, is characterized in that, described the second luminescent layer in described the second luminescence unit is luminous, and described the second luminescent layer is green light emitting layer;
Described Color Conversion layer is arranged on the bright dipping side of organic material functional layer described in described the second luminescence unit or described the 3rd luminescence unit.
4. OLED display according to claim 1, it is characterized in that, described OLED display also comprises and being arranged in described the first luminescence unit and described the second luminescence unit or described the second luminescence unit and described the 3rd luminescence unit, and barrier layer between the first luminescent layer and described the second luminescent layer; Described barrier layer is at the second luminescence unit, stops that the electronics or the hole that are injected into one of them luminescent layer inject another luminescent layer.
5. according to the OLED display described in claim 1 to 4 any one, it is characterized in that,
Described OLED display also comprises thin-film transistor; Wherein, the drain electrode of described thin-film transistor is electrically connected with described anode, and relatively described thin-film transistor, and described anode is near described thin-film transistor setting.
6. OLED display according to claim 5, is characterized in that, is transparent material at the material of described anode, and in the material of the described negative electrode situation that is opaque material, described photochromic conversion coating is arranged between described anode and described underlay substrate.
7. OLED display according to claim 5, is characterized in that, is transparent material at the material of described negative electrode, and in the material of the described anode situation that is opaque material, described photochromic conversion coating is arranged on described negative electrode away from described underlay substrate one side.
8. OLED display according to claim 5, it is characterized in that, be transparent material at the material of described anode and described negative electrode, described photochromic conversion coating be separately positioned between described anode and described underlay substrate and described negative electrode away from described underlay substrate one side.
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| CN201420143347.7U CN203746914U (en) | 2014-03-27 | 2014-03-27 | OLED displayer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943658A (en) * | 2014-03-27 | 2014-07-23 | 京东方科技集团股份有限公司 | OLED displayer and manufacturing method thereof |
| CN104505398A (en) * | 2014-12-31 | 2015-04-08 | 北京维信诺科技有限公司 | Organic electroluminescence display device and preparation method thereof |
| CN105737860A (en) * | 2014-12-08 | 2016-07-06 | 微动公司 | Transmitter and assembling method thereof |
-
2014
- 2014-03-27 CN CN201420143347.7U patent/CN203746914U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943658A (en) * | 2014-03-27 | 2014-07-23 | 京东方科技集团股份有限公司 | OLED displayer and manufacturing method thereof |
| WO2015143831A1 (en) * | 2014-03-27 | 2015-10-01 | 京东方科技集团股份有限公司 | Oled display and manufacturing method therefor |
| CN103943658B (en) * | 2014-03-27 | 2016-05-04 | 京东方科技集团股份有限公司 | A kind of OLED display and preparation method thereof |
| US9666647B2 (en) | 2014-03-27 | 2017-05-30 | Boe Technology Group Co., Ltd. | OLED display and method of manufacturing the same |
| CN105737860A (en) * | 2014-12-08 | 2016-07-06 | 微动公司 | Transmitter and assembling method thereof |
| CN105737860B (en) * | 2014-12-08 | 2018-05-25 | 微动公司 | Transmitter and its assemble method |
| CN104505398A (en) * | 2014-12-31 | 2015-04-08 | 北京维信诺科技有限公司 | Organic electroluminescence display device and preparation method thereof |
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