The right of priority and the rights and interests of 2005-131548 number of requiring to submit in Korea S Department of Intellectual Property on Dec 28th, 2005 of the application, 2005-131549 number and 2005-131550 korean patent application, it is all open to be contained in this by reference.
Embodiment
Below, with reference to Fig. 2 embodiment according to color filter array of the present invention is described in more detail.Fig. 2 is the structural drawing according to the color filter array of the embodiment of the invention.According to Fig. 2, color filter array comprises transparent substrates, red color filter, green color filter and blue color filter.In one embodiment, the illuminating source that uses in the color filter is the light source that blue light and ruddiness mix.Illuminating source can be set to individual layer or multilayer.The X coordinate is in 0.20 to 0.50 scope, and the Y coordinate is in 0.20 to 0.43 scope.
Fig. 3 shows the luminescent spectrum that illuminating source is only launched the light source that adopts in the color filter of embodiment of blue light and ruddiness, embodiment hereto, advantage is, according to driving voltage and current density, the variation of the color coordinate value of illuminating source is little, and makes illuminating source easily.
In one embodiment, transparent substrates by transparent material for example glass, transparent polymer etc. make, wherein, have versicolor color filter and be formed on the transparent substrates.
In one embodiment, red color filter comprises first color-converting material and green barrier material.The blue light of first color-converting material autoluminescence in the future light source is converted to the light of green wavelength and the light of a small amount of red wavelength, and the curve map of the luminescent spectrum of the light that passes first color-converting material has been shown among Fig. 4.In one embodiment, according to Fig. 4, light wavelength is from 450nm to 630nm, comprises the red color area of scope from the green district of 450nm to 610nm and scope from 610nm to 630nm.
In one embodiment, first color-converting material can be made or only be made with fluorescent pigment by fluorescent pigment and resin glue.In an embodiment, can use for example 3-(2 '-benzothiazolyl)-7-diethyl amino coumarin (below be called coumarin 6) or 3-(2 '-benzimidazolyl)-7-N of coumarin derivative, N-diethyl amino coumarin (below be called cumarin 7), Alq3, inorganic pigment and fluorescent material or organic pigment and fluorescent material.
In one embodiment, the green barrier material that abuts to form with first color-converting material is formed by have pigment or pigment dissolved that is higher than 50% transmissivity or the material that is distributed in the resin glue in the wavelength coverage of 600nm to 780nm.Fig. 5 is the curve map that illustrates according to the transmitted spectrum of the green barrier material of an embodiment.
In one embodiment, the structure red color filter makes color-converting material and green barrier material constitute two different layers.In another embodiment, color filter can be constructed to color-converting material and green barrier material is set to single mixolimnion.
In an embodiment, the blue light that passes red color filter is converted to green glow and ruddiness by first color-converting material, green glow is removed by green barrier material then, thereby only described ruddiness is mixed with ruddiness from original light source, thus luminescence efficiency and color coordinate value height.
In one embodiment, green color filter comprises second color-converting material and red barrier material.Second color-converting material can be converted to the first color-converting material identical materials of green glow and ruddiness by the blue light with autoluminescence in future light source and form.In an embodiment, coumarin derivative is 3-(2 '-benzothiazolyl)-7-diethyl amino coumarin (below be called coumarin 6) or 3-(2 '-benzimidazolyl)-7-N for example, and N-diethyl amino coumarin (below be called cumarin 7), Alq3, inorganic pigment and fluorescent material or organic pigment and fluorescent material can be as the fluorescent pigments of second color-converting material.
In one embodiment, the red barrier material that abuts to form with second color-converting material is lower than 30% transmissivity and has pigment or the pigment dissolved that is higher than 60% transmissivity or the material that is distributed in the resin glue is formed in the wavelength coverage of 400nm to 530nm by having in the wavelength coverage of 550nm to 750nm.In an embodiment, if red barrier material is only formed the easier preparation of then this red barrier material by the pigment that stops redness.Fig. 6 is the curve map that illustrates according to the transmitted spectrum of the red barrier material of the embodiment of the invention.
In one embodiment, the structure green color filter makes second color-converting material and red barrier material constitute two different layers.In another embodiment, second color-converting material and red barrier material are set to single mixolimnion.
In an embodiment, when blue light passed green color filter, blue light was converted to green glow and ruddiness by second color-converting material, Zhuan Huan ruddiness and removed by red barrier material from the ruddiness of light source then, thereby only remaining green glow.
In one embodiment, blue color filter comprises the red barrier material that is used to stop from the ruddiness of illuminating source.In an embodiment, cyan serial pigment, copper phthalocyanine serial pigment, indanthrone serial pigment, dioxazines serial pigment or their potpourri can be as the pigment of blue color filter.When the light of radiation passed blue color filter, ruddiness was stopped by red barrier material, only remaining blue light.
In one embodiment, can by on transparent substrates, apply black matrix", along coated position with versicolor color filter is formed black matrix pattern, apply according to described pattern order ground subsequently and have versicolor color filter and color filter patternization is made color filter array.
To describe the panel display apparatus of employing according to the color filter array of the embodiment of the invention in more detail below, wherein, above-mentioned color filter array is applied on the organic light-emitting display device as an example of panel display apparatus.Yet, it should be appreciated by those skilled in the art that green color filter also can be applied to the various display device except organic light-emitting display device, for example on the liquid crystal indicator.
Fig. 7 illustrates the cut-open view of application according to the organic light-emitting display device of the bottom-emission of the color filter array of the embodiment of the invention.According to Fig. 7, organic light-emitting display device comprises substrate 100, first electrode 110, organic luminous layer 120, second electrode 130 and color filter array 160.
In an embodiment, have good transparency, profile pattern, easily the glass or the transparent plastic of treatment characteristic and water proofing property/water tolerance can be used as substrate.
In an embodiment, the present invention is without any restriction, and ordinary electrode also can be used for first electrode 110 and second electrode 120, therefore will omit detailed description.In one embodiment, ITO, IZO, SnO
2Perhaps ZnO can be used for anode electrode, and Li, Mg, A1, A1-Li, Ca, Mg-In, Mg-Ag etc. can be used for cathode electrode.
In an embodiment, structure organic luminous layer 120 is with the mixed light of emission blue light and ruddiness.In this manual, term " organic luminous layer " is used as the notion that comprises luminescent layer in fact, and as the notion that comprises hole injection layer, hole transmission layer, emission layer, hole blocking layer, electron injecting layer and electron transfer layer alternatively.About the assembly of each layer and the details of function are known to those skilled in the art, therefore will omit detailed description.In addition,, should be appreciated that two-layer or two-layer above layer can be used to form organic luminous layer although usually organic luminous layer is described as individual layer.
Can construct organic luminous layer in every way.In one embodiment, can form blue light-emitting layer and red light emitting layer separately.In another embodiment, a plurality of blue light-emitting layers and red light emitting layer can be with stacked layout settings.
In an embodiment, be used for launching blue light material can from by as below Chemical formula 1,2,3,4,5,6,7,8,9 and the group formed of their combination select, described chemical formula is:
Chemical formula 1
Chemical formula 2
Chemical formula 3
Chemical formula 4
Chemical formula 5
Chemical formula 6
Chemical formula 7
Chemical formula 8
Chemical formula 9
In other embodiments, the material that is used for red-emitting can be selected from the group of being made up of following Chemical formula 10,11,12,13,14,15 and their combination, and described chemical formula is:
Chemical formula 10
Chemical formula 11
Chemical formula 12
Chemical formula 13
Chemical formula 14
Chemical formula 15
In one embodiment, can be by described material be controlled luminous intensity effectively in proper proportion mixing, the thickness of regulating luminescent layer and the ratio of main body and adulterant.In an embodiment, the scope of the X coordinate of the color coordinate value of mixed light is 0.20 to 0.50, and the scope of Y coordinate is 0.20 to 0.43.
For the embodiment of Fig. 7, with the surperficial facing surfaces that forms organic illuminating element on color filter array 160 is set, color filter array 160 comprises transparent substrates 170, red color filter 162, green color filter 163 and blue color filter 164.
In an embodiment, red color filter 162 comprises first color conversion layer 162a that contains first color-converting material and the green restraining barrier 162b that comprises green barrier material.In one embodiment, first color-converting material that is used for the first color conversion layer 162a is made by the material that will be converted to green glow and a small amount of ruddiness from the blue light of organic luminescent layer 120, the light wavelength of conversion is in the scope of 450nm to 630nm, this wavelength coverage comprises that scope is that green district and a spot of scope of 450nm to 610nm is the red color area of 610nm to 630nm, as mentioned above.
In one embodiment, the material of first color-converting material can be made or only be made by fluorescent pigment by fluorescent pigment and resin glue.In an embodiment, for example fluorescent pigment can for, coumarin derivative is 3-(2 '-benzothiazolyl)-7-diethyl amino coumarin (below be called coumarin 6) or 3-(2-benzimidazolyl)-7-N for example, N-diethyl amino coumarin (below be called cumarin 7), inorganic pigment and fluorescent material or organic pigment and fluorescent material.
In an embodiment, can form the first color conversion layer 162a by the thickness that in substrate, the film of color conversion resin combination is formed expectation.In one embodiment, film formation method can comprise spin coating, printing, coating etc.In an embodiment, can adopt patterning method.In one embodiment, the thickness of film is in the scope of 1 μ m to 30 μ m.If the thickness of film is less than 1 μ m, then color conversion is not smooth, if the thickness of film then is difficult to carry out photoetching greater than 30 μ m.
In an embodiment, the green restraining barrier 162b that abuts to form with the first color-converting material 162a is included in and has red pigment or the pigment dissolved that is higher than 50% transmissivity in the wavelength coverage of 600nm to 780nm or be distributed to material in the resin glue.
In one embodiment, can make green restraining barrier 162b by the film that on the first color conversion layer 162a, forms expectation thickness.In an embodiment, film formation method can comprise that spin coating, roller coating, rod are coated with (bar coating), casting, patterning etc.In one embodiment, photoetching process and silk screen print method can be used to form film patterning afterwards.In an embodiment, green restraining barrier 162b can form the thickness in 0.5 to 5 mu m range.If thickness then is difficult to regulate transparency less than 0.5 μ m, if thickness then is difficult to carry out photoetching greater than 5 μ m.In another embodiment, thickness is in the scope of 1 to 2 μ m.
In one embodiment, the blue light that passes red color filter 162 is converted to green glow and ruddiness by the first color conversion layer 162a, green glow is removed by green restraining barrier 162b, thereby only take place to mix with ruddiness, thereby luminescence efficiency and color coordinate value height from illuminating source from the ruddiness of color conversion layer 162a.
In an embodiment, green color filter 163 comprises second color conversion layer 163a that is made by second color-converting material and the red restraining barrier 163b that is made by red barrier material.In an embodiment, second color-converting material comprises the first color-converting material identical materials that is converted to green glow and ruddiness with the blue light of the light source of autoluminescence in the future.In one embodiment, the fluorescent pigment of color-converting material can adopt for example 3-(2 '-benzothiazolyl)-7-diethyl amino coumarin (below be called coumarin 6) or 3-(2 '-benzimidazolyl)-7-N of coumarin derivative, N-diethyl amino coumarin (below be called cumarin 7), Alq3, inorganic pigment and fluorescent material or organic pigment and fluorescent material.
In one embodiment, the red restraining barrier 163b that abuts to form with the second color-converting material 163a is included in to have in the wavelength coverage of 550nm to 750nm and is lower than 30% transmissivity and has material or the pigment dissolved that is higher than 60% transmissivity or be distributed to material in the resin glue in the wavelength coverage of 400nm to 530nm.In an embodiment, owing to red barrier material 163b only is made up of the pigment of block red light, thus easier manufacturing.
In one embodiment, when blue light passed green color filter 163, blue light was converted to green glow and ruddiness by the second color conversion layer 163a, removed by red restraining barrier 163b from the ruddiness of color conversion layer with from the ruddiness of illuminating source, thus only remaining green glow.
In an embodiment, blue color filter 164 comprises the red barrier material that stops from the light of the red wavelength of illuminating source.In an embodiment, cyan serial pigment, copper phthalocyanine serial pigment, indanthrone serial pigment, dioxazines serial pigment or their potpourri can be as the pigment of blue color filter 164.In an embodiment, when light passed blue color filter 164, ruddiness was stopped by red barrier material, only remaining blue light.
For organic light-emitting display device according to other embodiment, can comprise other assembly, for example, can comprise cushion 150 and black matrix" 161.Well known to a person skilled in the art that similar assembly can comprise in an embodiment, therefore will omit detailed description for the sake of simplicity.
In one embodiment, as mentioned above, any one in each color filter can form the color-converting material with mixing and the individual layer of barrier material.In an embodiment, the thickness of this single mixolimnion is in the scope of 1 to 30 μ m.If the thickness of film is less than 1 μ m, then color conversion is not smooth, if the thickness of film then is difficult to carry out photoetching greater than 30 μ m.
Fig. 8 illustrates the cut-open view of having used according to the organic light-emitting display device of the top light emitting of color filter of the present invention.According to the embodiment shown in Fig. 8, organic light-emitting display device comprises substrate 200, first electrode 210, organic luminous layer 220, second electrode 230 and color filter array 260.Optionally cushion 250 can be arranged between second electrode 230 and the color filter array 260.
Embodiment hereto, color filter array 260 is formed on second electrode, 230 those sides rather than is formed on substrate 200 those sides.In one embodiment, can be by color filter array 260 be fetched the manufacturing organic light-emitting display device mutually with the substrate surface that is formed with organic illuminating element.
The color filter array of present embodiment comprises red color filter 262, green color filter 263, blue color filter 264 and optional black matrix" 261.Red color filter 262 comprises the first color conversion layer 262a and green restraining barrier 262b as mentioned above, and green color filter 263 comprises the second color conversion layer 263a and red restraining barrier 263b as mentioned above.Transparent substrates 265 protection color filters.
In an embodiment, it will be appreciated by those skilled in the art that color filter array 260 can be formed with the extra play that combines with it easily, for example planarization layer.
As mentioned above, can be applied on the top surface of ray structure according to color filter array of the present invention or be applied on the lower surface of ray structure, to form top lighting structure or bottom-emission structure.Yet color filter array also can be applied on two surfaces of ray structure, to form two ray structures.
Describe manufacture method according to the embodiment of the invention with reference to Fig. 7 below, wherein, color-converting material and color barrier material are configured in respectively in the independent layer.The effect of making by described method according to color filter array of the present invention also will be described.
At first, on transparent substrates 170, form the pattern of black matrix" 161, then, on transparent substrates 170, apply each in three kinds of color filters 162,163,164.For the first color conversion layer 162a, the potpourri of the coumarin 6 of 25mg and the PVB of 2.5g (poly-ethyl butyral) is dissolved in the ethyl cellosolve of 7.5g, according to pattern potpourri is applied to thickness less than 10 μ m in the red pixel district, then 80 ℃ of dry half an hour.Then, on first color conversion layer, apply green restraining barrier 162b,, thereby form red color filter 162 at 80 ℃ of dryings two minutes and patterning.
In an embodiment, form the second color conversion layer 163a in the green pixel district by the technology identical with the technology that is used for red color filter, coated red restraining barrier 163b and on the second color conversion layer 163a with its patterning, thus green color filter 163 formed.In an embodiment, for blue color filter 164, in the blue pixel district, only form blue restraining barrier and do not have independent color-converting material.
Fig. 9 be blue light source and red-light source radiation be shown and pass curve map according to the luminescent spectrum of the light of the above-mentioned red color filter of the embodiment of the invention, Figure 10 be illustrate from the light source identical with light source among Fig. 9 and pass curve map according to the luminescent spectrum of the light of the red color filter of common manufacture method.The contrast of Figure 10 and Fig. 9 shows red color filter according to the present invention and compares with common red color filter, sees through the light of the blue wavelength of less amount, and has the light intensity of higher red wavelength.
Table 1 has compared the red color filter made by above-mentioned manufacture method and according to the color coordinate value and the luminescence efficiency of the common red color filter of embodiment, wherein, the mixed light of ruddiness and blue light has the efficient of the coordinate figure and the 19cd/A of (0.34,0.38).
Table 1
|
Light source |
Practical example |
Comparative Examples |
Color coordinate |
(0.34,0.38) |
(0.67,0.32) |
(0.65,0.31) |
Luminescence efficiency (cd/A) |
18 |
5.5 |
5.2 |
As shown in table 1, be (0.67,0.32) according to the color coordinate value of the red color filter of the embodiment of the invention, compare with the color coordinate value (0.65,0.31) of common red color filter, improved red emission can be provided.In addition, compare with common red color filter, the luminescence efficiency of red color filter of the present invention is obviously improved.
Figure 12 be illustrate from the hybrid light source radiation of blue light and ruddiness and pass curve map according to the luminescent spectrum of the above-mentioned green color filter of the embodiment of the invention, Figure 11 be illustrate from the light source identical with light source among Figure 11 and pass curve map according to the luminescent spectrum of the light of the green color filter of common manufacture method.The contrast of Figure 12 and Figure 11 shows according to the green color filter of the embodiment of the invention and compares with the situation of using common green color filter, has higher intensity in bigger green wavelength region.
Table 2 shows color coordinate value and the color coordinate value of luminescence efficiency and common green color filter and the contrast of luminescence efficiency by the green color filter of making according to the above-mentioned manufacture method of the embodiment of the invention, wherein, the color coordinate value of the hybrid light source of ruddiness and blue light is (0.32,0.41).
Table 2
|
Light source |
Practical example |
Comparative Examples |
Color coordinate |
(0.32,0.41) |
(0.22,0.67) |
(0.27,0.56) |
Luminescence efficiency (cd/A) |
11.7 |
6.5 |
5.4 |
Color coordinate value according to the green color filter of the embodiment of the invention is (0.22,0.67), and it provides with the color coordinate value (0.27,0.56) of common green color filter and has compared improved red emission, and is as shown in table 2.In addition, compare with common green color filter, the luminescence efficiency of green color filter of the present invention (6.5cd/A) is obviously improved.
Table 3 shows the color coordinate value and the luminescence efficiency of the light that passes red color filter and green color filter, and wherein, the color coordinate value of the mixed light of ruddiness and green glow is different with the color coordinate value and the luminescence efficiency of the foregoing description with luminescence efficiency.
Table 3
|
Luminescence efficiency (cd/A) |
Color coordinate |
Light source |
18 |
(0.34,0.38) |
Pass color filter ruddiness afterwards |
5.5 |
(0.67,0.32) |
Pass color filter green glow afterwards |
9.5 |
(0.25,0.65) |
Pass color filter blue light afterwards |
3.6 |
(0.10,0.21) |
Figure 13 is the curve map that the color coordinate value of table 3 is shown.As can be seen, the panchromatic reproduction range that can realize reaches 74%.
In an embodiment, all can adopt color filter of the present invention for any color filter in the various color filters (for example red color filter).In addition, for other color filter for example green color filter etc. can adopt other known color filter, vice versa.In addition, those skilled in the art can easily make the component on various materials, color conversion layer or the green restraining barrier etc. that constitute organic luminous layer and the variation of thickness.
Although specifically illustrate and described the present invention with reference to exemplary embodiment of the present invention, but it will be appreciated by those skilled in the art that, under the situation of the spirit and scope that do not break away from claim and equivalent thereof, can make above-mentioned to this in form and details and other variation.