WO2010128593A1 - 有機elディスプレイおよびその製造方法 - Google Patents
有機elディスプレイおよびその製造方法 Download PDFInfo
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- WO2010128593A1 WO2010128593A1 PCT/JP2010/003105 JP2010003105W WO2010128593A1 WO 2010128593 A1 WO2010128593 A1 WO 2010128593A1 JP 2010003105 W JP2010003105 W JP 2010003105W WO 2010128593 A1 WO2010128593 A1 WO 2010128593A1
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- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title description 25
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 239000011347 resin Substances 0.000 claims abstract description 80
- 239000011159 matrix material Substances 0.000 claims abstract description 64
- 238000005259 measurement Methods 0.000 claims description 35
- 238000005192 partition Methods 0.000 claims description 19
- 239000000049 pigment Substances 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract 3
- 239000010408 film Substances 0.000 description 41
- 125000006850 spacer group Chemical group 0.000 description 16
- 239000003086 colorant Substances 0.000 description 11
- 239000000758 substrate Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000002238 attenuated effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 239000001055 blue pigment Substances 0.000 description 3
- 239000001056 green pigment Substances 0.000 description 3
- 239000001054 red pigment Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000005305 interferometry Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
-
- 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
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
- H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
-
- 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
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
- H10K59/8723—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
Definitions
- the present invention relates to an organic EL display and a method for manufacturing the same, and more particularly to a top emission organic EL display panel having a structure in which an organic EL device and a color filter are bonded via a transparent resin.
- FIG. 5 shows the configuration of an organic EL display panel having a general top emission structure.
- FIG. 5A is a plan view of an organic EL display panel having a general top emission structure
- FIG. 5B is a cross-sectional view taken along line A1-A1 shown in FIG.
- a color filter 2 is disposed on the daylighting surface side of the organic EL device 1.
- the daylighting surface of the organic EL device is a surface from which light is emitted.
- the organic EL device 1 has a structure in which a lower electrode 4 is provided on a substrate 3 and an organic light emitting layer 6 of three primary colors is sandwiched between the lower electrode 4 and the upper electrode 7. Adjacent organic light emitting layers 6 are separated by light emitting layer partition walls 5.
- the color filter 2 has a structure in which a grid-like black matrix 9 is provided on a transparent substrate 8 and three primary color pigment layers 10 are arranged in each frame of the black matrix 9. The color filter 2 is arranged on the organic EL device 1 with the surface of the color filter 2 on the black matrix 9 side facing the organic EL device 1. For example, a glass substrate is used as the transparent substrate 8.
- the three primary color organic light emitting layers 6 are composed of a red light emitting layer, a blue light emitting layer, and a green light emitting layer.
- the organic light emitting layers 6 of the respective colors are repeatedly arranged in the first direction.
- the organic light emitting layer 6 having the same color is disposed in a second direction orthogonal to the first direction.
- the three primary color pigment layers 10 are composed of a red pigment layer 10a, a blue pigment layer 10b, and a green pigment layer 10c.
- the dye layers 10 of the respective colors are repeatedly arranged in the first direction.
- the dye layer 10 having the same color is disposed in the second direction.
- the three primary color pigment layers 10 are provided to adjust the chromaticity of the three primary color lights emitted from the three primary color organic light emitting layers 6.
- the black matrix 9 is provided to prevent color mixing of the three primary colors emitted from the organic light emitting layer 6 of the three primary colors.
- the black matrix 9 and the pigment layer 10 are provided over the entire effective pixel region for displaying an image in the organic EL display panel.
- the organic EL device 1 and the color filter 2 are bonded with a transparent resin 11.
- the transparent resin 11 By using the transparent resin 11, the three primary color lights emitted from the organic light emitting layer 6 reach the dye layer 10 without the amount of light being attenuated.
- the transparent resin 11 also has a function of protecting the organic light emitting layer 6 from deterioration due to oxygen or water.
- the thickness of the transparent resin 11 that determines the distance from the organic light emitting layer 6 of the organic EL device 1 to the dye layer 10 of the color filter 2 is set within a predetermined allowable range in order to suppress color unevenness. Must be set in.
- FIG. 6 is a view showing a configuration of a conventional organic EL display panel in which spherical spacers are diffusely mixed in a transparent resin layer.
- FIG. 6A is a plan view of the organic EL display panel
- FIG. 6B is a cross-sectional view taken along line A2-A2 shown in FIG. 6A
- FIG. 6C is a cross-sectional view taken along line A3-A3 shown in FIG.
- FIG. 6 the same members as those shown in FIG.
- FIG. 7 is a diagram showing a configuration of a conventional organic EL display panel in which a bar-shaped spacer is provided between an organic EL device and a color filter.
- FIG. 7A is a plan view of the organic EL display panel.
- 7B is a cross-sectional view taken along the line A4-A4 shown in FIG. 7A
- FIG. 7C is a cross-sectional view taken along the line A5-A5 shown in FIG. 7A.
- the rod-shaped spacer 13 is provided in the color matrix 9.
- a spherical spacer is diffused and mixed in the transparent resin layer, or a bar-like spacer is provided between the organic EL device and the color filter, so that The film thickness is set.
- the transparent resin film thickness setting method when the organic EL device and the color filter are bonded by the vacuum bonding method, it is possible to prevent the transparent resin film from becoming a predetermined film thickness or less. Even if it can, it cannot prevent that the film thickness of transparent resin becomes more than predetermined film thickness. Therefore, it is necessary to measure whether or not the thickness of the transparent resin is within a predetermined allowable range by measuring the thickness of the transparent resin after bonding the organic EL device and the color filter. When the film thickness of the transparent resin deviates from a predetermined allowable range, color unevenness occurs. Therefore, in the manufacture of an organic EL display panel, it is important to manage the film thickness of the transparent resin.
- the film thickness of the transparent resin can be measured by irradiating the transparent resin layer with measurement light. Specifically, the transparent resin layer is irradiated with measurement light, reflected light from the upper and lower interfaces of the transparent resin layer is obtained, and the film thickness of the transparent resin is measured using the reflected light.
- the conventional organic EL display panel having a top emission structure has a problem that the measurement of the film thickness of the transparent resin becomes unstable or the film thickness of the transparent resin cannot be measured. This is because the amount of light for measurement is attenuated by the black matrix and the dye layer, and the amount of reflected light from the upper and lower interfaces of the transparent resin layer is not sufficient for measurement.
- the amount of measurement light is attenuated by irradiating the measurement light from the color filter side to the film thickness of the transparent resin provided on the lower side of the color filter in the conventional organic EL display panel having a top emission structure. This is because the measurement light is transmitted through the black matrix and the dye layer when the measurement is performed.
- a pseudo pattern 16 is provided in an area other than the effective pixel area 15 of the organic EL display panel 14, and the thickness of the transparent resin in the area where the pseudo pattern 16 is provided is set.
- a method of measuring and analogizing the film thickness of the transparent resin in the effective pixel region 15 can be considered.
- the measurement light is irradiated to the area other than the effective pixel area 15 in which the black matrix and the dye layer are arranged, so that the amount of the measurement light is not attenuated. Therefore, the amount of reflected light from the upper and lower interfaces of the transparent resin layer is sufficient for measurement.
- this method is based on the premise that the film thickness of the transparent resin in the effective pixel region 15 is the same as the film thickness of the transparent resin in the region where the pseudo pattern 16 is disposed. There is a problem in accuracy compared with the method of directly measuring the film thickness of the transparent resin.
- an object of the present invention is to provide an organic EL display that can accurately measure the film thickness of a transparent resin in an effective pixel region and a manufacturing method thereof.
- the organic EL display of the present invention comprises: Organic having a plurality of partitions arranged at intervals in a predetermined direction, an organic light emitting layer provided between the adjacent partitions, a lower electrode, and an upper electrode sandwiching the organic light emitting layer together with the lower electrode An EL device; A color filter having a black matrix and a dye layer disposed in each frame of the black matrix; A transparent resin disposed between the organic EL device and the color filter; And having a structure in which the organic EL device and the color filter are bonded via the transparent resin, A light transmissive opening is provided in a portion of the black matrix excluding a portion facing the partition.
- the measurement light is irradiated to the opening provided in the black matrix so that the amount of the measurement light is not attenuated.
- the reflected light from the transparent resin near the pixel can be observed. Therefore, it becomes possible to accurately measure the film thickness of the transparent resin near the pixels in the effective pixel region, and an organic EL display without color unevenness can be manufactured. Furthermore, since it is only necessary to provide an opening in the black matrix, an organic EL display can be manufactured at a low cost.
- another aspect of the present invention is characterized in that in the organic EL display of the present invention described above, the opening is provided between the dye layers of the same color. According to this configuration, it is possible to prevent light of different colors from leaking through and mixing with each other and provide an organic EL display free from color unevenness and color mixing.
- Another aspect of the present invention is characterized in that, in the organic EL display of the present invention described above, the shape of the opening when viewed in plan is a rectangle or an ellipse. According to this configuration, the relative positioning accuracy between the irradiation position of the measurement light and the position of the opening can be relaxed. Accordingly, an inexpensive positioning device can be used, and an organic EL display can be manufactured at a low cost.
- another aspect of the present invention is characterized in that in the organic EL display of the present invention described above, the opening is provided in a broken shape. According to this configuration, the relative positioning accuracy of the measurement light can be relaxed, and light leakage from the opening can be suppressed. Therefore, an organic EL display can be produced at a low cost, and an organic EL display with less color unevenness and color mixing can be provided.
- a wall projecting toward the organic EL device is provided around the opening of the black matrix. To do. According to this configuration, light leakage from the opening can be reliably reduced, and an organic EL display without color unevenness or color mixing can be provided.
- the manufacturing method of the organic EL display of the present invention includes: Organic having a plurality of partitions arranged at intervals in a predetermined direction, an organic light emitting layer provided between the adjacent partitions, a lower electrode, and an upper electrode sandwiching the organic light emitting layer together with the lower electrode An EL device; A color filter having a black matrix and a dye layer disposed in each frame of the black matrix; A transparent resin disposed between the organic EL device and the color filter; A method of manufacturing an organic EL display having a structure in which the organic EL device and the color filter are bonded via the transparent resin, When the black matrix is formed or after the black matrix is formed, a light-transmitting opening is formed in a portion of the black matrix excluding a portion facing the partition.
- the organic EL device and the color filter are bonded together, and then the openings formed in the black matrix are interposed.
- the measurement light is irradiated to the transparent resin, and the film thickness of the transparent resin is measured using the reflected light from the transparent resin.
- Another aspect of the present invention is the above-described method for manufacturing an organic EL display of the present invention, wherein the black matrix is formed around the opening of the black matrix after the black matrix is formed or after the black matrix is formed. Further, a wall portion protruding to the organic EL device side is formed.
- FIG. 1 (a) is a top view of the organic electroluminescent display panel in Embodiment 1 of this invention
- FIG.1 (b) FIG. 1A is a diagram showing a part of a cross section taken along line B1-B1 shown in FIG. 1A
- FIG. 1C is a cross sectional view taken along line A11-A11 shown in FIG.
- FIG. 1D is a cross-sectional view taken along line A12-A12 shown in FIG.
- FIG.4 (a) is a top view of the organic electroluminescent display panel in Embodiment 2 of this invention
- FIG.4 (b) FIG. 4A is a diagram showing a part of a cross section taken along line B2-B2 shown in FIG. 4A
- FIG. 4C is a cross sectional view taken along line A13-A13 shown in FIG. FIG.
- FIG. 4D is a cross-sectional view taken along line A14-A14 shown in FIG. It is a figure for demonstrating the organic EL display panel of a general top emission structure.
- Fig.5 (a) is a top view of the organic EL display panel of a general top emission structure
- FIG.5 (b) is FIG.
- FIG. 6 is a cross-sectional view taken along the line A1-A1 shown in FIG.
- FIG. 6 is a diagram showing a configuration of a conventional organic EL display panel in which spherical spacers are diffusely mixed in a transparent resin layer.
- FIG. 6A shows a conventional organic material in which spherical spacers are diffusely mixed in a transparent resin layer.
- FIG. 6A shows a conventional organic material in which spherical spacers are diffusely mixed in a transparent resin layer.
- FIG. 6B is a cross-sectional view taken along the line A2-A2 shown in FIG. 6A
- FIG. 6C is a cross-sectional view taken along the line A3-A3 shown in FIG. 6A.
- FIG. It is a figure which shows the structure of the conventional organic EL display panel in which the rod-shaped spacer was provided between the organic EL device and the color filter.
- FIG. 7A shows a rod-shaped structure between the organic EL device and the color filter.
- FIG. 7B is a plan view of a conventional organic EL display panel provided with spacers
- FIG. 7B is a cross-sectional view taken along line A4-A4 shown in FIG. 7A
- FIG. 7C is FIG.
- FIG. 2 is a cross-sectional view taken along line A5-A5 shown in FIG. It is a figure for demonstrating the organic EL display panel of the top emission structure in which the pseudo pattern for film thickness measurement of transparent resin was provided in areas other than an effective pixel area.
- FIG. 1 is a diagram showing a configuration of an organic EL display panel according to Embodiment 1 of the present invention.
- FIG. 1 (a) is a plan view of the organic EL display panel
- FIG. 1 (b) is FIG.
- FIG. 1C shows a part of a cross section taken along line B1-B1 shown in FIG. 1A
- FIG. 1C shows a cross sectional view taken along line A11-A11 shown in FIG. 1A
- FIG. FIG. 2 is a cross-sectional view taken along line A12-A12 shown in FIG. 2 and 3 are plan views showing other examples of the organic EL display panel according to Embodiment 1 of the present invention.
- members corresponding to those shown in FIG. 1 are denoted by the same reference numerals.
- a color filter 22 is disposed on the daylighting side of the organic EL device 21.
- the organic EL device 21 has a structure in which a lower electrode 24 is patterned on a substrate 23 and an organic light emitting layer 26 is sandwiched between the lower electrode 24 and the upper electrode 27.
- the substrate 23 has a structure in which, for example, a TFT circuit and a planarizing layer are laminated on a glass.
- the patterned lower electrode 24 functions as a pixel.
- a plurality of light emitting layer partition walls 25 are arranged at a predetermined interval in the first direction, and adjacent organic light emitting layers 26 are separated by the light emitting layer partition walls 25. That is, the organic light emitting layer 26 is provided between the adjacent light emitting layer partition walls 25.
- the light emitting layer partition 25 may extend in a second direction orthogonal to the first direction.
- the three primary color organic light emitting layers 26 are composed of a red light emitting layer, a blue light emitting layer, and a green light emitting layer.
- the organic light emitting layers 26 of the respective colors are repeatedly arranged in the first direction.
- the organic light emitting layer 26 of the same color is disposed in the second direction.
- the three primary color organic light emitting layers 26 are provided over the entire effective pixel region.
- the color filter 22 has a structure in which a grid-like black matrix 29 is provided on a transparent substrate 28 and three primary color dye layers 30 are arranged in each frame of the black matrix 29.
- the color filter 22 is disposed on the organic EL device 21 with the surface of the color filter 22 facing the black matrix 29 facing the organic EL device 21.
- a glass substrate can be used as the transparent substrate 28.
- the three primary color pigment layers 30 in each frame are composed of a red pigment layer 30a, a blue pigment layer 30b, and a green pigment layer 30c, as shown in FIG.
- the dye layers 30 of the respective colors are repeatedly arranged in the first direction.
- the dye layer 30 of the same color is arranged in the second direction.
- the black matrix 29 and the three primary color pigment layers 30 are provided over the entire effective pixel region.
- the red pigment layer 30a, the blue pigment layer 30b, and the green pigment layer 30c have a thickness of 0.5 to 2 ⁇ m. All the pigment layers 30 may have the same thickness, or the pigment layer 30 may have a different thickness for each color.
- d1 represents the width of the dye layer 30
- d2 represents the length of the dye layer 30
- d3 represents the width of the frame of the black matrix 29.
- the width d1 of the dye layer 30 is 30 to 120 ⁇ m
- the length d2 of the dye layer 30 is 50 to 200 ⁇ m
- the width d3 of the frame of the black matrix 29 is 40 to 80 ⁇ m.
- the thickness of the black matrix 29 is 1 to 3 ⁇ m.
- the organic EL device 21 and the color filter 22 described above are bonded with a transparent resin 31.
- An alignment mark is provided on each of the substrate 23 of the organic EL device 21 and the transparent substrate 28 of the color filter 22. By using these alignment marks, the organic light emitting layer 26 of each color arranged on the organic EL device 21 is provided.
- the organic EL device 21 and the color filter 22 can be bonded via the transparent resin 31 without shifting the same colors of the dye layers 30 of the respective colors arranged in the color filter 22.
- the transparent resin 31 an epoxy resin can be used as the transparent resin 31 .
- the film thickness of the transparent resin 31 is 5 to 20 ⁇ m.
- the allowable range of film thickness is ⁇ 5 to 10%.
- this organic EL display panel is provided with a bar-shaped spacer 32 between the organic EL device 21 and the color filter 22 for the purpose of setting the film thickness of the transparent resin 31 within a predetermined allowable range. Yes.
- the spacer 32 is provided in the color matrix 29.
- a light transmissive opening 33 is provided in a portion of the black matrix 29 excluding a portion facing the light emitting layer partition 25. As shown in FIG. 1, the opening 33 is preferably formed at the center between the adjacent dye layers 30. In this way, leakage from the opening 33 of the light emitted from the organic light emitting layer 26 can be suppressed. Furthermore, since the opening 33 is formed between the dye layers 30 of the same color here, it is possible to prevent light of different colors from leaking from the opening 33 and mixing. Therefore, an organic EL display panel free from color unevenness and color mixing can be provided.
- the transparent resin 31 is irradiated with the measurement light 34 through the openings 33 provided in the black matrix 29, and the reflected light from the upper and lower interfaces of the transparent resin 31 is used for the transparent display.
- a step of measuring the film thickness of the resin 31 is included.
- an optical interference method or a confocal method can be used for the film thickness measurement of the transparent resin 31.
- the measurement light is irradiated to the inside of the measurement target layer, and the film thickness is measured using reflected light from the upper and lower interfaces of the measurement target layer.
- the film thickness of the transparent resin 31 is calculated using an interference waveform between the reflected light 35 from the upper interface of the transparent resin layer and the reflected light 36 from the lower interface of the transparent resin layer.
- White light having a wavelength of 200 to 800 nm can be used as measurement light for the optical interferometry.
- the film thickness of the transparent resin 31 is calculated using the difference between the confocal position of the reflected light 35 from the upper interface of the transparent resin layer and the confocal position of the reflected light 36 from the lower interface of the transparent resin layer.
- Laser light having a wavelength of 300 to 600 nm can be used as measurement light for the confocal method.
- ⁇ Thickness measurement by such optical interferometry or confocal method is a non-destructive inspection, and therefore 100% inspection is possible. As a result, defects in the manufacturing process can be detected at an early stage, yield can be improved, and manufacturing costs can be reduced.
- the light transmissive opening 33 is formed in a portion of the black matrix 29 excluding the portion facing the light emitting layer partition wall 25. Accordingly, in the manufacturing process of the organic display panel, the reflection from the transparent resin 31 in the vicinity of the pixels in the effective pixel region without irradiating the light amount of the measurement light 34 by irradiating the measurement light 34 to the opening 33. Lights 35 and 36 can be observed. Thereby, the film thickness of the transparent resin 31 in the effective pixel region can be accurately measured, and an organic EL display panel without color unevenness can be manufactured. Furthermore, since it is only necessary to provide the opening 33 in the black matrix 29, an organic EL display can be manufactured at low cost.
- FIG. 1 shows the opening 33 having a circular shape when viewed in plan
- an opening 33 having a rectangular or oval shape when viewed in plan may be provided as shown in FIG.
- the relative positioning accuracy between the measurement light irradiation position and the position of the opening 33 can be relaxed. That is, the reflected light can be observed even if the measurement light irradiation position is slightly shifted in the longitudinal direction of the rectangular or oval opening 33. Accordingly, an inexpensive positioning device can be used, and an organic EL display panel can be manufactured at a low cost.
- the opening 33 may be provided in a broken shape. According to this configuration, the relative positioning accuracy of the measurement light can be relaxed, and light leakage from the opening 33 can be suppressed. That is, even if the irradiation position of the measurement light is slightly shifted in the breaking direction, the reflected light can be observed, so that the relative positioning accuracy of the measurement light is relaxed. Accordingly, an inexpensive positioning device can be used, and an organic EL display panel can be manufactured at a low cost. Furthermore, since light leakage is suppressed, an organic EL display panel with less color unevenness and color mixing can be provided. This configuration is effective when the spot diameter of the measurement light is larger than 1/10 of the width of the black matrix 29 frame.
- the light-transmitting openings 33 described above can be created by appropriately selecting a photomask pattern when the black matrix 29 is created by, for example, a photolithography method. Alternatively, after the black matrix 29 is created, a part of the black matrix 29 may be removed by laser light or plasma to create the opening 33.
- FIG. 4 is a diagram showing the configuration of the organic EL display panel according to Embodiment 2 of the present invention.
- FIG. 4A is a plan view of the organic EL display panel
- FIG. 4B is FIG. 4A is a diagram showing a part of a cross section taken along line B2-B2 shown in FIG. 4A
- FIG. 4C is a cross sectional view taken along line A13-A13 shown in FIG. 4A
- FIG. FIG. 5 is a cross-sectional view taken along line A14-A14 shown in FIG.
- the organic EL display panel according to the second embodiment is that the wall 37 that protrudes toward the organic EL device 21 is provided around the light-transmitting opening 33 of the black matrix 29. Different from 1.
- the wall portion 37 can be created by switching the photomask and executing the photolithography process twice when the black matrix 29 is created by, for example, a photolithography method.
- the wall portion 37 may be made of a material different from the material constituting the black matrix 29. In this case, the wall portion 37 is created after the black matrix 29 is created. For example, when the spacer 32 is formed by the photolithography method after the black matrix 29 is formed, the wall portion 37 may be formed at the same time when the spacer 32 is formed.
- the organic EL display according to the present invention and the method for manufacturing the organic EL display make it possible to accurately measure the film thickness of the transparent resin in the effective pixel region by an optical film thickness measurement method. It is useful for the manufacture of panels with glass.
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Abstract
Description
所定方向に間隔をあけて配置される複数の隔壁と、隣接する前記隔壁の間に設けられた有機発光層と、下部電極と、前記下部電極とともに前記有機発光層を挟む上部電極とを有する有機ELデバイスと、
ブラックマトリックスと前記ブラックマトリックスの各枠内に配置された色素層とを有するカラーフィルタと、
前記有機ELデバイスと前記カラーフィルタとの間に配置された透明樹脂と、
を備え、前記有機ELデバイスと前記カラーフィルタとが前記透明樹脂を介して貼合わされた構造を持ち、
前記ブラックマトリックスの前記隔壁に対向する部分を除く部分に、光透過性の開口部が設けられている
ことを特徴とする。
所定方向に間隔をあけて配置される複数の隔壁と、隣接する前記隔壁の間に設けられた有機発光層と、下部電極と、前記下部電極とともに前記有機発光層を挟む上部電極とを有する有機ELデバイスと、
ブラックマトリックスと前記ブラックマトリックスの各枠内に配置された色素層とを有するカラーフィルタと、
前記有機ELデバイスと前記カラーフィルタとの間に配置された透明樹脂と、
を備え、前記有機ELデバイスと前記カラーフィルタとが前記透明樹脂を介して貼合わされた構造を持つ有機ELディスプレイを製造する方法であって、
前記ブラックマトリックスを作成する際か、または前記ブラックマトリックスを作成した後に、前記ブラックマトリックスの前記隔壁に対向する部分を除く部分に光透過性の開口部を形成する
ことを特徴とする。
図1は本発明の実施の形態1における有機ELディスプレイパネルの構成を示す図であり、詳しくは、図1(a)はその有機ELディスプレイパネルの平面図、図1(b)は、図1(a)に示すB1-B1線に沿った断面の一部を示す図、図1(c)は、図1(a)に示すA11-A11線に沿った断面図、図1(d)は、図1(a)に示すA12-A12線に沿った断面図である。また、図2および図3はそれぞれ本発明の実施の形態1における有機ELディスプレイパネルの他例を示す平面図である。なお、図2および図3において、図1に示す部材に対応する部材には同一符号を付している。
図4は本発明の実施の形態2における有機ELディスプレイパネルの構成を示す図であり、詳しくは、図4(a)はその有機ELディスプレイパネルの平面図、図4(b)は、図4(a)に示すB2-B2線に沿った断面の一部を示す図、図4(c)は、図4(a)に示すA13-A13線に沿った断面図、図4(d)は、図4(a)に示すA14-A14線に沿った断面図である。なお、図4において、図1に示す部材に対応する部材には同一符号を付している。
Claims (8)
- 所定方向に間隔をあけて配置される複数の隔壁と、隣接する前記隔壁の間に設けられた有機発光層と、下部電極と、前記下部電極とともに前記有機発光層を挟む上部電極とを有する有機ELデバイスと、
ブラックマトリックスと前記ブラックマトリックスの各枠内に配置された色素層とを有するカラーフィルタと、
前記有機ELデバイスと前記カラーフィルタとの間に配置された透明樹脂と、
を備え、前記有機ELデバイスと前記カラーフィルタとが前記透明樹脂を介して貼合わされた構造を持ち、
前記ブラックマトリックスの前記隔壁に対向する部分を除く部分に、光透過性の開口部が設けられている
ことを特徴とする有機ELディスプレイ。 - 前記開口部が、同色の前記色素層の間に設けられていることを特徴とする請求項1記載の有機ELディスプレイ。
- 前記開口部を平面視したときの形状が長方形または長円であることを特徴とする請求項1もしくは2のいずれかに記載の有機ELディスプレイ。
- 前記開口部が破断状に設けられていることを特徴とする請求項1もしくは2のいずれかに記載の有機ELディスプレイ。
- 前記ブラックマトリックスの前記開口部の周囲に、前記有機ELデバイス側に突出する壁部が設けられていることを特徴とする請求項1ないし4のいずれかに記載の有機ELディスプレイ。
- 所定方向に間隔をあけて配置される複数の隔壁と、隣接する前記隔壁の間に設けられた有機発光層と、下部電極と、前記下部電極とともに前記有機発光層を挟む上部電極とを有する有機ELデバイスと、
ブラックマトリックスと前記ブラックマトリックスの各枠内に配置された色素層とを有するカラーフィルタと、
前記有機ELデバイスと前記カラーフィルタとの間に配置された透明樹脂と、
を備え、前記有機ELデバイスと前記カラーフィルタとが前記透明樹脂を介して貼合わされた構造を持つ有機ELディスプレイを製造する方法であって、
前記ブラックマトリックスを作成する際か、または前記ブラックマトリックスを作成した後に、前記ブラックマトリックスの前記隔壁に対向する部分を除く部分に光透過性の開口部を形成する
ことを特徴とする有機ELディスプレイの製造方法。 - 請求項6記載の有機ELディスプレイの製造方法であって、前記有機ELデバイスと前記カラーフィルタとを貼合せた後に、前記ブラックマトリックスに形成された前記開口部を介して前記透明樹脂へ測定用光を照射し、前記透明樹脂からの反射光を用いて前記透明樹脂の膜厚を測定することを特徴とする有機ELディスプレイの製造方法。
- 請求項6もしくは7のいずれかに記載の有機ELディスプレイの製造方法であって、前記ブラックマトリックスを作成する際か、または前記ブラックマトリックスを作成した後に、前記ブラックマトリックスの前記開口部の周囲に、前記有機ELデバイス側に突出する壁部を形成することを特徴とする有機ELディスプレイの製造方法。
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