CN1991417A - Color filter array and organic light-emitting display device using the same - Google Patents
Color filter array and organic light-emitting display device using the same Download PDFInfo
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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Abstract
A colour filter array is provided that is capable of implementing full colour with improved light-emitting efficiency and colour coordinate values from a mixed light of blue and red, and an organic light-emitting display device using the same. A colour filter array receiving a mixed light of blue wavelength light and red wavelength light to implement full colour according to an embodiment of the invention comprises a red filter, a green filter, and a blue filter. The red filter includes a first colour conversion material for converting the blue wavelength light into green light and red light and a green blocking material for blocking the green light. The green filter includes a second colour conversion material for converting the blue wavelength light into green light and red light and a red blocking material for blocking the red light. The blue filter includes a red blocking material for blocking the red wavelength light.
Description
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.
Technical field
The present invention relates to the panel display apparatus of a kind of color filter array and this color filter array of employing, more particularly, the present invention relates to a kind of panchromatic color filter array and the organic light-emitting display device that can realize having improved luminescence efficiency and color coordinate value by blue and red mixed light.
Background technology
In addition, the present invention relates to a kind of organic light-emitting display device, in this organic light-emitting display device, can easily form luminescent layer, and the color coordinate value of luminescent layer does not take place seriously to change according to driving voltage and current density.
Usually, three-colour light-emitting method, filter method and color conversion method are as realizing that in panel display apparatus panchromatic method is known, and particularly, these three kinds of methods are as realizing that in organic illuminating element panchromatic method is known.The three-colour light-emitting method adopts redness (R) separately, green (G) and blue (B) light source to come red-emitting, green glow and blue light, filter method is divided into ruddiness, green glow and blue light by color filter with main light from white emitting light source, and the color conversion method utilizes color-converting material (phosphor) to replace color filter will be divided into ruddiness, green glow and blue light from the light of blue-light-emitting light source.
The problem of three-colour light-emitting method is that the life-span of any color has determined the life-span of total system, color filter has absorbed the amount minimizing of white light light so the problem of filter method is, the problem of color conversion method is by blue-light excited color-converting material, thereby contrast reduces.
Disclose a kind of color light emitting device among Fig. 1, Fig. 1 is the synoptic diagram of traditional color light emitting device.This device comprises: red color filter, be used for blue light and green glow from white light are converted to ruddiness, and transmit red light only; Green color filter is used for the blue light from white light is converted to green glow, and transmit green only.Yet the problem of this color light emitting device is, adopted the color coordinate value distortion of three kinds of bad wavelength of the colour purity of luminescence efficiency and ruddiness, three-colour light-emitting light source serious, and its manufacturing process complexity.
Summary of the invention
The invention is intended to address the above problem, and provide the organic light-emitting display device of a kind of color filter array and employing light source and color filter, wherein, from the mixed light of illuminating source emission blue light and ruddiness, and form the color filter that comprises color-converting material and photoresist.
Mixed light according to the light of the reception blue wavelength of the embodiment of the invention and red wavelength comprises red color filter, green color filter and blue color filter to realize panchromatic color filter array.Red color filter comprises blue light is converted to first color-converting material of green glow and ruddiness and the green barrier material of block green light.Green color filter comprises blue light is converted to second color-converting material of green glow and ruddiness and the red barrier material of block red light.Blue color filter comprises the red barrier material of block red light.
In addition, organic light-emitting display device comprises according to another embodiment of the present invention: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, the mixed light of emission blue light and ruddiness; Second electrode is formed on the described organic luminous layer; Red color filter, green color filter and blue color filter are formed on another surface of described substrate.Described red color filter comprises the blue light from organic luminescent layer is converted to first color-converting material of green glow and ruddiness and the green barrier material of block green light.Described green color filter comprises the blue light from organic luminescent layer is converted to second color-converting material of green glow and ruddiness and the red barrier material of block red light.Described blue color filter comprises the red barrier material that stops from the ruddiness of organic luminous layer.
In addition, the organic light-emitting display device according to further embodiment of this invention comprises: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, is used for launching the mixed light of blue light and ruddiness; Second electrode is formed on the described organic luminous layer; Red color filter, green color filter and blue color filter are formed on the outside of described second electrode.Described red color filter comprises the blue light from organic luminescent layer is converted to first color-converting material of green glow and ruddiness and the green barrier material of block green light.Described green color filter comprises the blue light from organic luminescent layer is converted to second color-converting material of green glow and ruddiness and the red barrier material of block red light.Described blue color filter comprises the red barrier material that stops from the ruddiness of organic luminous layer.
In addition, comprise according to the red color filter of further embodiment of this invention and be used for the green barrier material that will be converted to the color-converting material of green glow and ruddiness and be used for block green light from the blue light of the illuminating source emission of radiation blue light and ruddiness.
In addition, the organic light-emitting display device according to further embodiment of this invention comprises: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, is used to launch the mixed light of blue light and ruddiness; Second electrode is formed on the organic luminous layer; Red color filter is formed in another surperficial red pixel district of described substrate, and wherein, described red color filter comprises the blue light that is used for from the organic luminous layer emission and is converted to the color-converting material of green glow and ruddiness and the green barrier material of block green light.
In addition, the organic light-emitting display device according to further embodiment of this invention comprises: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, is used to launch the mixed light of blue light and ruddiness; Second electrode is formed on the organic luminous layer; Red color filter is formed in the red pixel district in the outside of described second electrode, and wherein, described red color filter comprises the blue light that is used for from the organic luminous layer emission and is converted to the color-converting material of green glow and ruddiness and the green barrier material of block green light.
In addition, comprise according to the green color filter of further embodiment of this invention and be used for the red barrier material that will be converted to the color-converting material of green glow and ruddiness and be used for block red light from the blue light of the illuminating source emission of radiation blue light and ruddiness.
In addition, the organic light-emitting display device according to further embodiment of this invention comprises: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, is used to launch the mixed light of blue light and ruddiness; Second electrode is formed on the organic luminous layer; Green color filter is formed in another surperficial green pixel district of described substrate, and wherein, described green color filter comprises the blue light that is used for from the organic luminous layer emission and is converted to the color-converting material of green glow and ruddiness and the red barrier material of block red light.
In addition, the organic light-emitting display device according to further embodiment of this invention comprises: substrate; First electrode is formed on the surface of described substrate; Organic luminous layer is formed on described first electrode, is used to launch the mixed light of blue light and ruddiness; Second electrode is formed on the organic luminous layer; Green color filter is formed on the outside of described second electrode, and wherein, described blue color filter comprises the blue light that is used for from the organic luminous layer emission and is converted to the color-converting material of green glow and ruddiness and the red barrier material of block red light.
According to color filter array of the present invention and adopt the organic light-emitting display device of this color filter array to improve and realize the panchromatic luminescence efficiency and the color coordinate value of ruddiness and green glow by the mixed light of blue light and ruddiness.
In addition, by providing identical color-converting material to described red color filter and green color filter, color filter array according to the present invention has improved production efficiency.
In addition, for organic light-emitting display device according to the present invention, because its luminescent layer is only by red and blue the composition, so the color coordinate value is also little according to the variation of driving voltage and current density.
Description of drawings
The description below the exemplary embodiment of carrying out in conjunction with the accompanying drawings, these and other objects of the present invention and advantage will become clear and be more readily understood, wherein:
Fig. 1 is the synoptic diagram according to the color filter array of prior art.
Fig. 2 illustrates the synoptic diagram of the embodiment of color filter array according to an embodiment of the invention.
Fig. 3 is the curve map that the luminescent spectrum of the illuminating source that adopts in the color filter array according to an embodiment of the invention is shown.
Fig. 4 is the curve map that illustrates according to the luminescent spectrum of the color-converting material of the embodiment of Fig. 2.
Fig. 5 is the curve map that illustrates according to the transmission curve of the green barrier material of the red color filter of the embodiment of Fig. 2.
Fig. 6 is the curve map that illustrates according to the transmission curve of the red barrier material of the green color filter of the embodiment of Fig. 2.
Fig. 7 illustrates the cut-open view of application according to the embodiment of the organic light-emitting display device of the color filter array of the embodiment of the invention.
Fig. 8 illustrates the cut-open view of application according to another embodiment of the organic light-emitting display device of the color filter array of the embodiment of the invention.
Fig. 9 is the curve map of the luminescent spectrum of the organic light-emitting display device of the red color filter of formation one embodiment of the invention on blue light-emitting layer and red light emitting layer.
Figure 10 is the curve map of luminescent spectrum that forms the organic light-emitting display device of traditional red color filter on blue light-emitting layer and red light emitting layer.
Figure 11 is the curve map of luminescent spectrum that forms the organic light-emitting display device of traditional green color filter on blue light-emitting layer and red light emitting layer.
Figure 12 forms the curve map of the luminescent spectrum of the organic light-emitting display device of green color filter according to an embodiment of the invention on blue light-emitting layer and red light emitting layer.
Figure 13 illustrates the curve map of the improved color coordinate value of organic light-emitting display device according to an embodiment of the invention.
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, Al, 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 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 11
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.
Claims (40)
1, a kind of color filter comprises:
Color-converting material is used for the blue light from emitting red light light source and blue-light-emitting light emitted is converted to green glow and ruddiness;
The color barrier material is used for stopping the light of the color of selecting from ruddiness and green glow.
2, color filter as claimed in claim 1, wherein, described color filter is a red color filter, described color barrier material is to be used for the green barrier material of block green light.
3, color filter as claimed in claim 2, wherein, the transmissivity of described green barrier material in the scope of 600nm to 780nm more than 50%.
4, color filter as claimed in claim 1, wherein, described color filter is a green color filter, described color barrier material is to be used for the red barrier material of block red light.
5, color filter as claimed in claim 4, wherein, the transmissivity of described red barrier material in the wavelength coverage of 550nm to 750nm below 30%, in the wavelength coverage of 400nm to 530nm more than 60%.
6, color filter as claimed in claim 1, wherein, described color-converting material and described color barrier material are set to independent layer.
7, color filter as claimed in claim 1, wherein, described color-converting material and described color barrier material are set to individual layer.
8, a kind of mixed light that is used for receiving blue light and ruddiness comprises to realize panchromatic color filter array:
Red color filter comprises and is used for green barrier material that described blue light is converted to first color-converting material of green glow and ruddiness and is used for stopping described green glow,
Green color filter comprises and is used for red barrier material that described blue light is converted to second color-converting material of green glow and ruddiness and is used for stopping described ruddiness,
Blue color filter comprises the red barrier material that is used for stopping described ruddiness.
9, color filter array as claimed in claim 8, wherein, described first color barrier material and the described second color barrier material comprise from by the material of selecting coumarin derivative, Alq3, inorganic pigment and fluorescent material, organic pigment and fluorescent material and the group formed thereof.
10, color filter array as claimed in claim 9, wherein, described first color-converting material and described second color-converting material comprise from by 3-(2 '-benzothiazolyl)-7-diethyl amino coumarin, 3-(2 '-benzimidazolyl)-7-N, the coumarin derivative of selecting in the group that N-diethyl amino coumarin and combination thereof are formed.
11, color filter array as claimed in claim 8, wherein, the transmissivity of described green barrier material in the wavelength coverage of 600nm to 780nm more than 50%.
12, color filter array as claimed in claim 8, wherein, the transmissivity of described red barrier material in the wavelength coverage of 550nm to 750nm below 30%, and in the wavelength coverage of 400nm to 530nm more than 60%.
13, color filter array as claimed in claim 8, wherein, described first color-converting material and described green barrier material are set to independent layer.
14, color filter array as claimed in claim 8, wherein, described first color-converting material and described green barrier material are set to individual layer.
15, color filter array as claimed in claim 8, wherein, described second color-converting material and described red barrier material are set to independent layer.
16, color filter array as claimed in claim 8, wherein, described second color-converting material and described red barrier material are set to individual layer.
17, a kind of organic light-emitting display device comprises:
Substrate limits opposite first and second surface;
First electrode is arranged on the described first surface of described substrate;
Organic luminous layer is arranged on described first electrode and is used for launching the mixed light of blue light and ruddiness;
Second electrode is arranged on the described organic luminous layer;
Color filter array, be arranged at least one in the described second surface of described second electrode or described substrate, described color filter array comprises at least one color filter corresponding with pixel region, and described color filter comprises and is used for the color barrier material that will be converted to the color conversion layer of green glow and ruddiness and be used for stopping the light of the color of selecting from ruddiness and green glow from the blue light of described organic luminous layer emission.
18, organic light-emitting display device as claimed in claim 17, wherein, described color filter array separates by the described second surface of cushion with described second electrode or described substrate.
19, organic light-emitting display device as claimed in claim 17, wherein, described color filter array is arranged on described second electrode.
20, organic light-emitting display device as claimed in claim 17, wherein, described color filter array is arranged on the described second surface of described substrate.
21, organic light-emitting display device as claimed in claim 17, wherein, described color filter array is arranged on first color filter array on described second electrode; Described display device also comprises second color filter array on the described second surface that is arranged on described substrate.
22, organic light-emitting display device as claimed in claim 17, wherein, the color coordinate value of described mixed light is in the scope of X=0.20 to 0.50, Y=0.20 to 0.43.
23, organic light-emitting display device as claimed in claim 17, wherein, described organic luminous layer comprises the material of selecting from the group of being made up of following chemical formula and composition thereof, and 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
24, organic light-emitting display device as claimed in claim 23, wherein, described organic luminous layer also comprises from by the material of selecting following chemical formula and the group formed thereof, and described chemical formula is:
Chemical formula 10
Chemical formula 11
Chemical formula 12
Chemical formula 13
Chemical formula 14
Chemical formula 15
25, organic light-emitting display device as claimed in claim 17, wherein, described organic luminous layer comprises the material of selecting by in following chemical formula and the group formed thereof, and described chemical formula is:
Chemical formula 10
Chemical formula 11
Chemical formula 12
Chemical formula 13
Chemical formula 14
Chemical formula 15
26, organic light-emitting display device as claimed in claim 17, wherein, described color filter is a red color filter, described color barrier material is to be used for the green barrier material of block green light.
27, organic light-emitting display device as claimed in claim 26, wherein, the transmissivity of described green barrier material in the wavelength coverage of 600nm to 780nm more than 50%.
28, organic light-emitting display device as claimed in claim 17, wherein, described color filter is a green color filter, described color barrier material is to be used for the red barrier material of block red light.
29, want 28 described organic light-emitting display devices as right, wherein, the transmissivity of described red barrier material in the wavelength coverage of 550nm to 750nm below 30%, in the wavelength coverage of 400nm to 530nm more than 60%.
30, organic light-emitting display device as claimed in claim 17, wherein, described color-converting material is set to ground floor, and described color barrier material is set to the second layer.
31, organic light-emitting display device as claimed in claim 30, wherein, the thickness of described ground floor is 1 to 30 μ m, the thickness of the described second layer is 0.5 to 5 μ m.
32, organic light-emitting display device as claimed in claim 17, wherein, described color-converting material and described color barrier material are set to individual layer.
33, organic light-emitting display device as claimed in claim 32, wherein, the thickness that comprises the layer of described color-converting material and described color barrier material is from 1 to 10 μ m.
34, organic light-emitting display device as claimed in claim 17, wherein, described at least one color filter comprises:
Red color filter comprises and is used for the green glow barrier material that will be converted to first color-converting material of green glow and ruddiness and be used for stopping described green glow from the described blue light of described organic luminous layer emission;
Green color filter comprises and is used for the red barrier material that will be converted to second color-converting material of green glow and ruddiness and be used for stopping described ruddiness from the described blue light of described organic luminous layer emission;
Blue color filter comprises the red barrier material that is used for stopping from the described ruddiness of described organic luminous layer emission.
35, organic light-emitting display device as claimed in claim 34, wherein, the color coordinate value of described mixed light is in the scope of X=0.20 to 0.50 and Y=0.20 to 0.43.
36, organic light-emitting display device as claimed in claim 34, wherein, described organic luminous layer comprises from by the material of selecting following chemical formula and the group formed thereof, and 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
Chemical formula 10
Chemical formula 11
Chemical formula 12
Chemical formula 13
Chemical formula 14
Chemical formula 15
37, organic light-emitting display device as claimed in claim 34, wherein, for in described red color filter and the described green color filter at least one, corresponding first color-converting material or second color-converting material comprise ground floor, and respective green barrier material or red barrier material comprise the second layer.
38, organic light-emitting display device as claimed in claim 37, wherein, the thickness of described ground floor is from 1 to 30 μ m, the thickness of the described second layer is from 0.5 to 5 μ m.
39, organic light-emitting display device as claimed in claim 34, wherein, for in described red color filter and the described green color filter at least one, corresponding first color-converting material or second color-converting material and respective green barrier material or red barrier material comprise individual layer.
40, organic light-emitting display device as claimed in claim 39, wherein, the thickness of described individual layer is from 1 to 10 μ m.
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| CN100510800C (en) | 2009-07-08 |
| KR20070069418A (en) | 2007-07-03 |
| KR100739295B1 (en) | 2007-07-12 |
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Owner name: SAMSUNG DISPLAY CO., LTD. Free format text: FORMER OWNER: SAMSUNG MOBILE DISPLAY CO., LTD. Effective date: 20121126 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121126 Address after: South Korea Gyeonggi Do Yongin Patentee after: Samsung Display Co., Ltd. Address before: Gyeonggi Do Korea Suwon Patentee before: Samsung Mobile Display Co., Ltd. |