WO2010116718A1 - 有機エレクトロルミネッセンス表示装置 - Google Patents
有機エレクトロルミネッセンス表示装置 Download PDFInfo
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- WO2010116718A1 WO2010116718A1 PCT/JP2010/002502 JP2010002502W WO2010116718A1 WO 2010116718 A1 WO2010116718 A1 WO 2010116718A1 JP 2010002502 W JP2010002502 W JP 2010002502W WO 2010116718 A1 WO2010116718 A1 WO 2010116718A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
Definitions
- the present invention relates to an organic electroluminescence (EL) display device capable of multicolor emission.
- EL organic electroluminescence
- An organic EL display device is a light-emitting display device using an electroluminescence phenomenon of an organic compound, and has been put into practical use as a small-sized display device used for a mobile phone or the like.
- the organic EL display device is configured by arranging on a substrate a plurality of organic EL elements capable of controlling light emission independently for each pixel.
- An organic EL display device capable of multicolor emission is configured by periodically arranging a plurality of single-color light emitting organic EL elements that generate light of different colors (different wavelengths) such as blue, green, and red.
- a color display device including a multicolor light-emitting organic EL display device is required to have high color purity of emitted light and capable of displaying an image with excellent contrast as display quality performance.
- various display devices have been proposed to meet such demands.
- high color purity means that it is possible to represent a larger portion of the region surrounded by the locus drawn by the single wavelength light in the visible light region in the chromaticity coordinates.
- the contrast means the ratio of the luminance of the non-light emitting portion and the light emitting portion (luminance of the light emitting portion ⁇ luminance of the non-light emitting portion).
- luminance of the light emitting portion luminance of the light emitting portion ⁇ luminance of the non-light emitting portion.
- Patent Document 1 discloses wavelength selectivity that selectively transmits one of blue, green, and red light generated in each organic EL element through a portion of the wavelength selection layer (color filter) that matches the organic EL element.
- a conventional configuration (referred to as a black matrix) in which a visible light absorbing material is disposed on a non-light emitting region between adjacent organic EL elements may be combined with such a configuration.
- the color purity of the emitted light of each organic EL element is enhanced by the color filter having the wavelength selection characteristic suitable for the color of the emitted light, and the external light is absorbed by the visible light absorbing material. Is absorbed, and an image with excellent contrast can be displayed.
- Patent Document 2 discloses a display filter that absorbs light having a wavelength between two outgoing light wavelengths (for example, an intermediate wavelength between blue and green and an intermediate wavelength between green and red), and the like.
- a plasma display panel using a simple display filter is disclosed.
- the light purity of the emitted light is enhanced by absorbing the light of the intermediate wavelength contained in the emitted light from each light emitting pixel.
- the display filter of Patent Document 2 since it has a uniform wavelength selection characteristic on the entire surface, it can be manufactured at a very low cost, but is not suitable for an organic EL display device in which the emission peak wavelengths of blue and green light are close. There is a problem of being. If light of an intermediate wavelength between blue and green is absorbed in an organic EL display device, light having a useful wavelength is absorbed. For example, in order to obtain blue color purity, there is a disadvantage that the green light emission efficiency is greatly reduced. .
- a configuration that does not use a color filter is also conceivable.
- the blue color purity is generally low due to a problem caused by the organic EL light emitting material.
- the color purity can be improved by using the optical cavity effect.
- the color change due to the viewing angle is generally increased. Therefore, it is difficult to obtain high display quality performance with a configuration that does not use a color filter.
- a technique for reducing the reflectance of external light using a polarizing plate is generally known.
- the polarizing plate is generally expensive and has a great problem of cost.
- the polarizing plate since the polarizing plate has a low transmittance of light emitted from the inside of the device, there is a problem of a decrease in luminance and an increase in power consumption.
- the present invention has been made in view of the above circumstances, and provides a multicolor light-emitting organic EL display device that can display an image excellent in color purity and contrast and is suitable for reducing manufacturing costs. Objective.
- a multicolor light emitting organic EL display device includes a plurality of organic EL light emitting units and non-light emitting units that emit red light, green light, or blue light on a main substrate.
- a multi-color light emitting organic EL display device wherein the first portion has a selective transmission property with respect to a desired blue light, and a second portion has an absorption property with respect to at least visible light other than the desired blue light.
- the first light control layer has a plurality of openings, and the first part and the second part are integrally formed of the same material, and the plurality of openings are formed of the red light.
- the light emitting part and the green light emitting part may be arranged so as to overlap each other, and the second part may have an absorptivity with respect to the entire visible light region.
- the multicolor light-emitting organic EL display device does not include a light control layer having a selective transmission property for red light and a light control layer having a selective transmission property for green light.
- the production cost is reduced to half or less. Since the second light control layer can be realized by a solid film, it is manufactured at a very low cost.
- the light control layer having selective permeability to the red light, and the green light It is not necessary to separately include a light control layer having selective transparency.
- the second dimming layer secures the color purity of green and red by absorbing an intermediate wavelength between green and red. Furthermore, since external light (for example, the peak wavelength of a fluorescent lamp) belonging to the intermediate wavelength is also absorbed, the contrast is improved as a result of suppressing the external light reflectance.
- the first portion of the first light control layer also contributes to the improvement of contrast due to absorption of external light.
- the first portion of the first dimming layer functions as a blue color filter and ensures blue color purity.
- the second dimming layer selectively absorbs an intermediate wavelength between green and red, and thus does not deteriorate the blue light emission efficiency.
- the second portion of the first light control layer may be integrally formed of the same material as the blue color filter of the first portion, or may be a black matrix that has been conventionally used.
- the first dimming layer is composed of only the blue color filter, or is composed of only the blue color filter and the black matrix, so that each of the blue, green and red color filters and the black matrix is formed. Compared with the conventional color filter comprised by this, it is suitable for producing at low cost. Since the second light control layer can be realized by a solid film, it can be manufactured very inexpensively.
- FIG. 1 is an exploded perspective view showing a schematic configuration of a main part of an organic EL display device according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a schematic configuration of a main part of the organic EL display device according to the embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing a schematic configuration of a main part of the organic EL display device according to the embodiment of the present invention.
- FIG. 4 is a graph showing red, green, and blue EL spectra used in Examples and Comparative Examples.
- FIG. 5 is a graph showing an absorption spectrum of the first dimming layer or the second dimming layer used in Examples and Comparative Examples.
- FIG. 6 shows the spectrum of the fluorescent lamp used for calculating the external light reflectance, the absorption spectrum when transmitted through the second light control layer twice, and the fluorescent lamp after transmission used in the examples and comparative examples. It is a graph which shows a spectrum.
- a multicolor light emitting organic EL display device (hereinafter referred to as an organic EL display device) according to the present invention includes a plurality of organic EL light emitting units that emit red light, green light, or blue light on a main substrate.
- a color light emitting organic EL display device comprising: a first part having a selective permeability to a desired blue light; and a second part having an absorptivity for at least visible light other than the desired blue light.
- a first dimming layer, and a second dimming layer that has selective absorption with respect to light having an intermediate wavelength between desired red light and desired green light.
- the inventors paid attention to chromaticity of emitted light, luminous efficiency, and external light reflectance as display quality performance in a color organic EL display device. These items are determined based on the emission spectrum (EL spectrum) of the organic EL element and the absorption spectra of the first dimming layer and the second dimming layer.
- EL spectrum emission spectrum
- the chromaticity of the emitted light is preferably close to the chromaticity value indicating high color purity from the viewpoint of color reproducibility, the higher the luminous efficiency is preferable from the viewpoint of power consumption, and the lower the external light reflectance is, the brighter contrast. From the viewpoint of reflection.
- the number of manufacturing steps of the light control layer is small from the viewpoint of reducing the manufacturing cost.
- the inventors calculated the chromaticity, light emission efficiency, and external light reflectance of emitted light using a number of EL spectra and absorption spectra, and as a result of earnestly examining the results, the color organic EL configured as described above was obtained. It was confirmed that the apparatus can display an image with excellent color purity and contrast and is suitable for reducing the production cost.
- FIG. 1 is an exploded perspective view showing an example of the configuration of an organic EL display device 1 according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view showing an AA ′ cross section of the organic EL display device 1.
- the organic EL display device 1 includes a main substrate 101 provided with a red light emitting layer 111 that is a light emitting part of red light, green light, and blue light, a green light emitting layer 112, a blue light emitting layer 113, and a bank 104 that is a non-light emitting part. And the sub-substrate 107 on which the first dimming layer 109 is formed are bonded together by the second dimming layer 106.
- the first light control layer 109 is disposed at a position overlapping the blue light emitting layer 113, and has a first portion (a portion indicated by reference numeral B in FIG. 1) that selectively transmits desired blue light, and the bank 104. And a second part (a part indicated by a symbol M in FIG. 1) that has an absorptivity with respect to visible light other than the desired blue light.
- the blue color filter 123 is integrally formed at the position overlapping the blue light emitting layer 113 and the position overlapping the bank 104 as the first portion and the second portion described above.
- the blue color filter 123 is not formed at a position overlapping the red light emitting layer 111 and a position overlapping the green light emitting layer 112.
- the first light control layer 109 has an opening 108 that is disposed so as to overlap the red light emitting layer 111 and the green light emitting layer 112.
- a top emission type organic EL display device will be described as an example, but the same effect can be obtained by a bottom emission type.
- the main board 101 is prepared.
- a driving circuit including a transistor array and the like well-known in the active matrix display device is formed.
- a reflective anode 102 is formed and subsequently patterned into a predetermined shape.
- the material of the anode 102 is not particularly limited, and examples thereof include aluminum, silver, chromium, nickel, and the like. From the viewpoint of luminous efficiency, a material with high reflectance can be preferably used.
- the anode 102 may have a laminated structure of a plurality of layers, for example, may be formed by forming ITO (Indium Tin Oxide) on aluminum.
- a bank 104 is formed, and then patterned so that the upper part of the anode 102 is exposed.
- the material of the bank 104 is not particularly limited, and for example, an insulating and photosensitive resin is used.
- a film forming method and a patterning method are not particularly limited, and for example, patterning may be performed by a photolithography method after film formation on the entire surface by a wet process.
- the hole transport layer 103 is formed.
- the material of the hole transport layer 103 is not particularly limited, and may be, for example, a low molecular material, a high molecular material, or a mixture thereof. In general, a triarylamine derivative can be preferably used. Further, the formation method of the hole transport layer 103 is not particularly limited, and may be a wet process such as an inkjet method or a dry process such as a vacuum evaporation method.
- a red light emitting layer 111, a green light emitting layer 112, and a blue light emitting layer 113 are formed.
- the light emitting material used for each of the red light emitting layer 111, the green light emitting layer 112, and the blue light emitting layer 113 may be a low molecular weight material, a high molecular weight material, or a mixture thereof.
- These luminescent materials need to be materials that emit light having a chromaticity that is close to a certain degree to the chromaticity desired as the emitted light. The generation spectrum by the luminescent material and the chromaticity of the emitted light after color correction by the light control layer will be described in detail later.
- the cathode 105 has an electron injection function, and also functions as an electron injection layer.
- the structure of the cathode 105 is not particularly limited, but in the case of the top emission structure, the visible light transmittance needs to be high to some extent.
- a structure in which an alloy of lithium fluoride, magnesium, and silver is stacked can be used.
- the sub-substrate 107 having the first light control layer 109 is manufactured.
- the sub substrate 107 is a glass substrate, for example.
- the first light control layer 109 emits blue light as a first part having a selective transmission property with respect to a desired blue light and a second part having absorptivity with respect to visible light other than the desired blue light.
- the layer 113 and the non-light emitting portion are made of a blue color filter 123 that is integrally formed with the same material.
- the non-light emitting portion is a place where the bank 104 is present, and this portion is electrically insulated and therefore does not emit light.
- the blue color filter 123 improves the purity of blue by selectively transmitting desired blue light contained in the light generated in the blue light emitting layer 113. Moreover, the contrast of the display image is improved by absorbing visible light other than the desired blue light included in the external light on the bank 104.
- the material of the blue color filter 123 is not particularly limited, but a material in which a pigment or dye is dispersed in a resin can be preferably used.
- the absorption spectrum is important, and the relationship with the emission spectrum will be described in detail later.
- a method for manufacturing the blue color filter 123 and the black matrix 124 on the sub-substrate 107 is not particularly limited, but, for example, a method using a photolithography method using a pigment dispersed in a photosensitive resin. Can be mentioned.
- sub-substrate 107 carrying the first dimming layer 109 and the main substrate 101 carrying the organic EL light emitting part are bonded together by the second dimming layer 106.
- this method is not particularly limited, for example, a method in which a pigment is dispersed in a photocurable resin, the main substrate 101 and the sub-substrate 107 are bonded with this resin, and then fixed by light irradiation. Is mentioned. As shown in FIG. 2, it is necessary to align the position of the bank 104 with the portion formed as the second portion of the blue color filter 123.
- the absorption spectrum of the second dimming layer 106 is important, and needs to have selective absorptivity with respect to light having an intermediate wavelength between desired red light and desired green light. As an example, it may have an absorption spectrum in which the absorptance becomes maximum at a wavelength between 600 nm and 520 nm. The relationship between the absorption spectrum and the chromaticity of the emitted light will be described in detail later.
- Example 2 In Example 2, compared with Example 1, the formation method of the organic EL light emitting unit is the same, but the configuration of the first light control layer 110 is different.
- FIG. 3 is a cross-sectional view illustrating an example of the configuration of the organic EL display device 2 according to the second embodiment, and corresponds to the AA ′ cross section of the organic EL display device 1 of FIG.
- the first light control layer 110 of the organic EL display device 2 was produced as follows.
- the sub-substrate 107 having the first light control layer 110 is manufactured independently of the process of manufacturing the organic EL light emitting unit on the main substrate 101.
- the sub substrate 107 is a glass substrate, for example.
- the first dimming layer 110 is formed in alignment with the blue light emitting layer 113, and is positioned in the non-light emitting portion and the blue color filter 123, which is a first part that selectively transmits the desired blue light. And a black matrix 124, which is a second part that absorbs the entire visible light region.
- the non-light emitting portion is a place where the bank 104 is present, and this portion is electrically insulated and therefore does not emit light.
- the blue color filter 123 and the black matrix 124 are not formed at a position overlapping the red light emitting layer 111 and a position overlapping the green light emitting layer 112. Accordingly, the first light control layer 110 has an opening 108 disposed so as to overlap the red light emitting layer 111 and the green light emitting layer 112.
- the blue color filter 123 improves the purity of blue by selectively transmitting desired blue light contained in the light generated in the blue light emitting layer 113.
- the material of the blue color filter 123 is not particularly limited, but a material in which a pigment or dye is dispersed in a resin can be preferably used.
- the absorption spectrum is important, and the relationship with the emission spectrum will be described in detail later.
- the black matrix 124 has an absorptance of, for example, 90% or more (preferably almost 100%) in the entire visible light region, and improves the contrast of the display image by absorbing outside light.
- the material of the black matrix 124 is not particularly limited, but a material in which a pigment or dye is dispersed in a resin can be preferably used.
- a method for manufacturing the blue color filter 123 and the black matrix 124 on the sub-substrate 107 is not particularly limited, but, for example, a method using a photolithography method using a pigment dispersed in a photosensitive resin. Can be mentioned.
- sub-substrate 107 carrying the first dimming layer 110 and the main substrate 101 carrying the organic EL light emitting part are bonded together by the second dimming layer 106.
- this method is not particularly limited, for example, a method in which a pigment is dispersed in a photocurable resin, the main substrate 101 and the sub-substrate 107 are bonded with this resin, and then fixed by light irradiation. Is mentioned. As shown in FIG. 3, the black matrix 124 and the bank 104 need to be aligned.
- Comparative Examples 1 to 5 are configured by changing a part of Examples 1 and 2 for comparison with Examples 1 and 2, respectively.
- Example 1 An organic EL display device was produced in the same manner as in Example 1 except that the first dimming layer 109 and the second dimming layer 106 were not used.
- Example 2 An organic EL display device was produced in the same manner as in Example 1 except that the second light control layer 106 was not used.
- Example 3 An organic EL display device was produced in the same manner as in Example 1 except that the first light control layer 109 was not used.
- Example 4 An organic EL display device was produced in the same manner as in Example 2 except that the first light control layer 110 was not provided with a black matrix.
- Example 5 As the first light control layer 110, in addition to the blue color filter and the black matrix of Example 2, a green color filter was provided in accordance with the position of the green light emitting layer, and a red color filter was provided in accordance with the position of the red light emitting layer.
- An organic EL display device was produced in the same manner as in Example 2 except that the second light control layer 106 was not used.
- FIG. 4 is a graph showing spectra of light (hereinafter referred to as EL spectra) generated in the red, green and blue light emitting materials used in Examples 1 and 2 and Comparative Examples 1 to 5. These are spectra before passing through the first dimming layer 109, the first dimming layer 110, and the second dimming layer 106.
- EL spectra spectra of light
- FIG. 5 shows red, green, and blue absorption spectra of the blue color filter 123 of the first dimming layer 109 and the first dimming layer 110 used in Examples 1 and 2 and Comparative Examples 1 to 5, and the second dimming.
- 3 is a graph showing an absorption spectrum of an optical layer 106. These are typical examples of the shape of the absorption spectrum of a color filter for a liquid crystal display device or an organic EL display device, and are reproduced using a function similar to a normal distribution function.
- FIG. 6 is a graph showing the spectra of fluorescent lamps used in Examples 1 and 2 and Comparative Examples 1 to 5 to calculate the external light reflectance. For reference, the absorption spectrum when transmitted through the second light control layer 106 twice and the spectrum of the fluorescent lamp are shown together.
- Table 1 summarizes the structure and the number of film-forming steps of the light control layer together with the calculation results for Examples 1 and 2 and Comparative Examples 1 to 5.
- the spectrum after passing through the light control layer was calculated by multiplying the EL spectrum described above by the absorption spectrum of the light control layer.
- the chromaticity was calculated from the spectrum after passing through the light control layer.
- the luminance ratio was calculated from the area ratio of the spectrum after passing through the light control layer (considering the visibility curve).
- the external light reflectance was calculated from the area ratio of the spectrum obtained by transmitting the fluorescent lamp spectrum of FIG. 6 twice through the light control layer at the time of incidence and at the time of emission (considering the visibility curve).
- the external light reflectance is greatly reduced.
- the external light reflectance is improved by absorption of external light by the second dimming layer 106 and the first dimming layer 109 or the first dimming layer 110.
- the first dimming layer 109, the first dimming layer 110, and the second dimming layer 106 greatly contribute to the improvement of chromaticity and external light reflection.
- Example 1 In Example 1 and Example 2, it can be seen that the chromaticities of red and green are improved. This is based on color correction by the second light control layer 106.
- Example 1 and Example 2 the external light reflectance is improved, which is improved by the external light absorption by the second light control layer 106.
- the use of the second light control layer 106 improves the chromaticity of green and red and the external light reflectance.
- Example 1 and Example 2 it can be seen that blue chromaticity and external light reflectance are improved. This is based on the fact that the blue chromaticity is improved by the first portion of the first dimming layer 109 or the first dimming layer 110 that transmits blue.
- the external light reflectance is improved. This is based on the fact that in the first embodiment, external light is absorbed by the second portion of the first light control layer 109 that absorbs visible light other than blue. In Example 2, since the black matrix 124 was formed in accordance with the non-light emitting portion, it can be seen that the reflection of external light is further suppressed.
- the first dimming layer 109 and the first dimming layer 110 are important for improving the blue chromaticity and the external light reflectance.
- Example 1 and Example 2 the external light reflectance is improved. This is based on the fact that the external light on the bank 104 is absorbed by the second portion of the first dimming layer 109 that absorbs visible light other than blue or the black matrix 124.
- the second portion of the first light control layer 109 that absorbs visible light other than blue or the black matrix 124 is important for improving the external light reflectance.
- the organic EL display device of the embodiment according to the present invention the performance of chromaticity, luminance ratio, and external light reflectance equivalent to those of the conventional three-color filter and black matrix is shown, and the color filter is manufactured Cost can be reduced to less than half.
- the organic EL display device of the present invention has been described based on the embodiment.
- the present invention is not limited to this embodiment. Unless it deviates from the meaning of the present invention, those in which various modifications conceived by those skilled in the art have been made in the present embodiment are also included in the scope of the present invention.
- the organic EL display device according to the present invention is particularly suitable for application to a large-screen active matrix type display device capable of multicolor light emission combined with a thin film transistor.
- the organic EL display device is applicable to all display devices such as televisions and personal computers. Available.
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Abstract
Description
図1は、本発明の実施例1に係る有機EL表示装置1の構成の一例を示す分解斜視図である。
実施例2では、実施例1と比べて、有機EL発光部の形成方法は同じであるが、第1調光層110の構成が異なる。
第1調光層109および第2調光層106を用いなかったこと以外は、実施例1と同様にして有機EL表示装置を作製した。
第2調光層106を用いなかったこと以外は、実施例1と同様にして有機EL表示装置を作製した。
第1調光層109を用いなかったこと以外は、実施例1と同様にして有機EL表示装置を作製した。
第1調光層110にブラックマトリクスを設けなかったこと以外は、実施例2と同様にして有機EL表示装置を作製した。
第1調光層110として、実施例2の青カラーフィルタおよびブラックマトリクスに加えて、緑色発光層の位置に合わせて緑カラーフィルタを設け、赤色発光層の位置に合わせて赤カラーフィルタを設けたこと、および第2調光層106を用いなかったこと以外は、実施例2と同様にして有機EL表示装置を作製した。
101 主基板
102 陽極
103 正孔輸送層
104 バンク
105 陰極
106 第2調光層
107 副基板
108 開口部
109、110 第1調光層
111 赤色発光層
112 緑色発光層
113 青色発光層
123 青カラーフィルタ
124 ブラックマトリクス
Claims (12)
- 主基板上に赤色光、緑色光、または青色光を発する複数の有機EL発光部と非発光部を配置してなる多色発光有機EL表示装置であって、
所望の青色光に対して選択的な透過性を有する第1部位と、少なくとも前記所望の青色光以外の可視光に対して吸収性を有する第2部位とを有する第1調光層と、
所望の赤色と所望の緑色光との中間の波長の光に対して選択的な吸収性を一面に有する第2調光層と
を備え、
前記第1部位が前記青色光の発光部に重なって配置され、前記第2部位が前記非発光部に重なって配置されている
多色発光有機EL表示装置。 - 前記第1調光層が複数の開口部を有すると共に、前記第1部位と前記第2部位とが同一材料で一体に形成されており、
前記複数の開口部は、前記赤色光の発光部及び前記緑色光の発光部に重なって配置されている
請求項1に記載の多色発光有機EL表示装置。 - 赤色光に対して選択的な透過性を有する調光層、及び、緑色光に対して選択的な透過性を有する調光層を含まない
請求項1または2に記載の多色発光有機EL表示装置。 - 前記第2部位が可視光全域に対して吸収性を有する
請求項1に記載の多色発光有機EL表示装置。 - 前記第1調光層は、前記主基板とは別体の副基板上に形成され、
前記主基板と前記副基板とは、前記第1調光層と前記有機EL発光部とが向かい合う向きに貼り合わされている
請求項1に記載の多色発光有機EL表示装置。 - 前記多色発光有機EL表示装置の厚さ方向に、前記有機EL発光部、前記第1調光層、および前記第2調光層が、この順に配置されている
請求項5に記載の多色発光有機EL表示装置。 - 前記第2調光層は、前記中間の波長の1/4の厚さを有する1/4波長板、または着色された偏光板である
請求項6に記載の多色発光有機EL表示装置。 - 前記多色発光有機EL表示装置の厚さ方向に、前記有機EL発光部、前記第2調光層、および前記第1調光層が、この順に配置されている
請求項5に記載の多色発光有機EL表示装置。 - 前記第1調光層および前記第2調光層は、前記主基板とは別体の副基板上にこの順に形成され、
前記主基板と前記副基板とは、前記第2調光層と前記有機EL発光部とが向かい合う向きに貼り合わされている
請求項8に記載の多色発光有機EL表示装置。 - 前記主基板と前記副基板とは、着色された樹脂層によって貼り合わされ、
前記樹脂層が前記第2調光層として機能する
請求項5に記載の多色発光有機EL表示装置。 - 前記副基板は、着色されたガラスまたはプラスチックからなり、前記第2調光層として機能する
請求項5に記載の多色発光有機EL表示装置。 - 多色発光有機EL表示装置における陽極から陰極の間に配置される1層以上の有機層が着色されており、当該着色された有機層が前記第2調光層として機能する
請求項5に記載の多色発光有機EL表示装置。
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CN201080014463.3A CN102369788B (zh) | 2009-04-09 | 2010-04-06 | 有机电致发光显示装置 |
JP2011508240A JP5306451B2 (ja) | 2009-04-09 | 2010-04-06 | 有機エレクトロルミネッセンス表示装置 |
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US8564196B2 (en) | 2013-10-22 |
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US20120025699A1 (en) | 2012-02-02 |
JP5306451B2 (ja) | 2013-10-02 |
KR101317577B1 (ko) | 2013-10-11 |
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