WO2011121662A1 - 表示パネル装置及び表示パネル装置の製造方法 - Google Patents
表示パネル装置及び表示パネル装置の製造方法 Download PDFInfo
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- WO2011121662A1 WO2011121662A1 PCT/JP2010/002364 JP2010002364W WO2011121662A1 WO 2011121662 A1 WO2011121662 A1 WO 2011121662A1 JP 2010002364 W JP2010002364 W JP 2010002364W WO 2011121662 A1 WO2011121662 A1 WO 2011121662A1
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- display panel
- lens
- panel device
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- 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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
- G02B27/1046—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators
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- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
- G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
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- G02B5/003—Light absorbing elements
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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
- H10K50/80—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
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
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- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/80—Constructional details
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H—ELECTRICITY
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Definitions
- the present invention relates to a display panel device including an organic EL light emitting element and a method of manufacturing the same.
- a display panel device provided with an organic EL (Electro Luminescence) element is a next-generation panel technology expected from the viewpoints of thinning of FPD, high image quality, production cost and the like.
- a top emission type organic EL display panel As an example, a circuit substrate including a thin film transistor from the lower side of the panel, a light emitting portion having a light emitting layer sandwiched between electrodes, a lens layer for enhancing the light extraction efficiency to the outside of the panel, a glass substrate as a protective material, etc.
- An organic EL display panel is proposed. In the surface of this organic EL display panel, the panel is divided into pixels, and the pixels are further divided into light emitting areas for emitting the three primary colors of light, red, green and blue. There is.
- part of the light emitted from the light emitting layer passes through the layers described above and reaches the outside of the panel.
- light emitted in the light emitting layer is transmitted through the lens layer and the glass substrate on the upper side of the light emitting layer, and is emitted to the outside of the organic panel.
- light emitted in the light emitting layer is guided to the lower side of the light emitting layer, and is reflected by the reflective electrode in the lowermost layer of the light emitting portion.
- the organic EL display panel when light is emitted to the outside of the organic EL display panel, light is guided from the light emitting portion toward the glass substrate in the top layer of the panel, regardless of which path the light is emitted.
- the light is reflected at the interface between the adhesive layer for bonding the glass substrate and the glass substrate or at the interface between the glass substrate and air, and the reflected light returns to the inside of the panel. Therefore, the reflected light enters the adjacent light emitting areas of different colors.
- the light entering the light emitting area of a different color is reflected by the reflective electrode in the lowermost layer of the light emitting portion. Then, the light reflected by the reflection electrode is transmitted through the light emitting layer and the like, and is emitted to the outside of the organic EL display panel from the pixel portion different from the pixel which has emitted light.
- the light emitting portion including the light emitting layer of the organic EL panel is susceptible to deterioration due to the influence of ambient air or surrounding materials, and is unstable. Therefore, in order to block contact with the outside, it is necessary to provide a sealing layer between the light emitting portion and the lens layer.
- the sealing layer By forming the sealing layer, the path of light from the light emitting portion to the layer formed of the lens layer is increased, and the number of interfaces between the sealing layer and the layers above and below is increased. The rate at which emitted light is reflected and scattered increases.
- the sealing layer and the layers above and below the sealing layer are provided. There is a problem that the reflected light and the scattered light generated at the interface with the above become stray light in the panel and enter into the adjacent light emitting area.
- FIG. 18 is a cross-sectional view of a conventional display panel device disclosed in Patent Document 1. As shown in FIG.
- the insulating layer 1008 is patterned on the conductive layer 1007, and a conductive layer structure is formed by the conductive layer 1007 and the insulating layer 1008. .
- the conductive layer structure defines the well. The wells are in line with the light emitting area of the organic LED (OLED) device.
- this patent document 1 does not directly correspond to the above problem, it is mentioned that the conductive layer 1007 or the insulating layer 1008 may function as a light absorbing material that absorbs external light (from paragraph [0025] See paragraph [0027]).
- the optical material is formed on the light emitting portion including the common light transmitting electrode 1006, the electron transporting layer 1005, the light emitting layer 1004, the hole transporting layer 1003, and the bottom electrode 1002 on the substrate 1001.
- the light transmitting cover 1010 is formed with the gap 10011 interposed therebetween.
- the optical material 1009 is partitioned by the conductive layer structure.
- the conductive layer 1007 constituting the conductive layer structure is for supplying a current to the common light transmitting electrode 1006 in order to prevent a decrease in the surface resistivity of the common light transmitting electrode 1006, and hence the conventional display In the panel device, the common light transmitting electrode 1006 and the conductive layer 1007 can not be disposed separately. Therefore, in the conventional display panel device, the optical material 1009 sectioned by the conductive layer 1007 can not be spaced apart from the common light transmitting electrode 1006. As a result, in the conventional display panel device, since the sealing layer is provided between the light emitting portion and the lens layer, the light path from the light emitting portion to the lens layer is enlarged, so that sealing is performed. It is not possible to cope with the problem that reflected light and scattered light generated at the interface between the stopper layer and the layers above and below become stray light in the panel and enter into the adjacent light emitting area.
- this invention is made in view of the said subject, Comprising: When the sealing layer is provided between the said light emission part and the said lens layer, the path of the light from the said light emission part to the said lens layer Reflected light and scattered light that are generated at the interface between the sealing layer and the layers above and below become stray light in the panel and prevent entry into the adjacent light emitting area, resulting in clear color And a method of manufacturing the same.
- the organic EL display panel device includes a lower electrode, an upper electrode, and any of red, green and blue interposed between the lower electrode and the upper electrode.
- a plurality of pixel units including an organic light emitting layer that emits light, a glass substrate provided above the upper electrode, and the plurality of pixel units interposed between the plurality of pixel units and the glass substrate
- a lens sheet having a plurality of lenses provided corresponding to each of the plurality of lenses and a base portion that is a base on which the lenses are formed to be protruded, the plurality of pixels interposed between the upper electrode and the lens sheet Between the glass substrate and the lens sheet, the height of which is at least higher than the height of the lens, and the color difference between the different color pixels Lens to do
- the lens sheet is formed along the outer periphery of the region of the base portion provided with the lens, and is recessed from the surface of the base portion in the direction opposite to the projection direction of the lens.
- the partition wall is inserted into
- the stray light is absorbed by the partition inserted in the hollow portion of the lens sheet provided between the sealing layer and the glass substrate, It is possible to prevent stray light from entering the light emitting area. Further, external light entering from the outside and reflected light generated at the interface between the glass substrate and the adhesive layer and the interface between the glass substrate and the air can also be absorbed by the outer wall.
- FIG. 1 is a plan view of a display panel apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view of the display panel apparatus according to the first embodiment of the present invention cut along the line X-X 'shown in FIG.
- FIG. 3 is a view showing the progress of light emitted from the organic light emitting layer in the display panel device according to Embodiment 1 of the present invention.
- FIG. 4 is a cross-sectional view showing the progress of reflected light in the lens unit of the display panel device according to Embodiment 1 of the present invention.
- FIG. 5 is a cross-sectional view showing the progress of external light in the lens unit of the display panel device according to Embodiment 1 of the present invention.
- FIG. 6 is a cross-sectional view of the shape of the partition wall in the lens unit of the display panel device according to Embodiment 1 of the present invention.
- FIG. 7 is a cross-sectional view of the shape of the partition wall in the lens unit of the display panel device according to Embodiment 1 of the present invention.
- FIG. 8 is a cross-sectional view of the shape of the partition wall in the lens unit of the display panel device according to Embodiment 1 of the present invention.
- FIG. 9 is a cross-sectional view showing dimensions of a partition wall and an organic EL portion in the display panel device according to Embodiment 1 of the present invention.
- FIG. 10 is a view showing dimensions of a lens sheet in the display panel device according to Embodiment 1 of the present invention.
- FIG. 11 is a graph showing the relationship between the thickness difference between the base film thickness and the external extraction efficiency in the display panel device according to the first embodiment of the present invention.
- FIG. 12 is a plan view of the display panel apparatus according to Embodiment 1 of the present invention.
- FIG. 13 is a partial cross-sectional view of a display panel device according to a first modification of the first embodiment.
- FIG. 14 is a partial cross-sectional view of a display panel device according to a second modification of the first embodiment.
- FIG. 15 is a flowchart of a method of manufacturing a display panel device according to Embodiment 1 of the present invention.
- FIG. 16A is a diagram showing a process of step 103 of a method of manufacturing a display panel device according to Embodiment 1 of the present invention.
- FIG. 16B is a diagram showing a process of step 104 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16C is a diagram showing a process of step 105 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16D is a diagram showing a process of step 106 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16E is a diagram showing a process of step 107 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16F is a diagram showing a process of step 108 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16G is a diagram showing a process of step 109 of a method of manufacturing a display panel device according to Embodiment 1 of the present invention.
- FIG. 16H is a diagram showing a process of step 110 of the method of manufacturing the display panel device according to the first embodiment of the present invention.
- FIG. 16I is a diagram showing a process of step 111 of a method of manufacturing a display panel device according to the first embodiment of the present invention.
- FIG. 17 is an external view of a display device including the display panel device according to Embodiment 1 of the present invention.
- FIG. 18 is a cross-sectional view of a conventional display panel device disclosed in Patent Document 1. As shown in FIG.
- a display panel apparatus includes a lower electrode, an upper electrode, and an organic light emitting layer interposed between the lower electrode and the upper electrode and emitting red, green or blue light.
- a plurality of lenses interposed between a plurality of pixel units, a glass substrate provided above the upper electrode, the plurality of pixel units and the glass substrate, and provided corresponding to each of the plurality of pixel units
- a lens sheet having a base portion which is a base on which the lens protrudes, and a sealing layer interposed between the upper electrode and the lens sheet for sealing the plurality of pixel portions
- a partition wall is provided between the glass substrate and the lens sheet, the height of which is at least higher than the height of the lens, and which divides between lenses corresponding to the pixel parts having different colors to emit.
- the sheet has a recess formed along the outer periphery of the region of the base portion provided with the lens and recessed from the surface of the base in the direction opposite to the direction in which the lens protrudes, and the partition wall
- the peripheral surface inserted in the recess of the lens sheet and inserted in at least the recess of the partition is black.
- the partition wall is provided between the glass substrate and the lens sheet so that the height thereof is at least higher than the height of the lens, and between the corresponding lenses between the pixel parts having different colors to be emitted Partition
- the light emitted from the pixel unit corresponding to one color and totally reflected by the glass substrate is provided between the lenses toward the pixel unit corresponding to another color adjacent to the one pixel unit. It can be shut off with the Therefore, the light emitted from the pixel portion corresponding to the one color and totally reflected by the glass substrate can be significantly suppressed from intruding into the pixel portion corresponding to the other color.
- a recess which is recessed from the surface of the base in the direction opposite to the projecting direction of the lens is formed along the outer periphery of the region of the base where the lens is provided.
- the surrounding surface inserted in at least the said hollow part of the said partition is made black.
- the tip of the partition absorbs external light incident from the outside of the display panel device through the glass substrate.
- the front end of the partition functions as a black matrix which is conventionally used as one of the color filters, so that external light entering from the outside of the display panel device is prevented from reaching the plurality of pixel units. can do. Therefore, it can suppress that the said exterior light reflects from the said transparent electrode, and inject
- the partition wall provided between the respective lenses has a function of blocking reflected light from the glass substrate, and stray light of light emitted from the organic light emitting layer included in the pixel portion corresponding to the one color.
- the three functions of the function of absorbing and the function of absorbing the external light are shared by one member. Therefore, it is not necessary to separately provide separate members for achieving each function, and the number of members constituting the display panel device can be reduced, and the film thickness of the organic EL element can be reduced accordingly. As a result, the manufacturing cost of the display panel device can be reduced, and the light extraction efficiency can be improved.
- the front end of the partition inserted in the recess of the lens sheet is from the organic light emitting layer included in the pixel corresponding to one color partitioned by the partition The emitted light is absorbed toward the pixel unit corresponding to another color adjacent to the pixel unit corresponding to the one color.
- light emitted from the pixel unit corresponding to the one color is transmitted from the upper electrode of the pixel unit corresponding to the one color to the pixel unit corresponding to the one color via the sealing layer. It diffuses in the direction of the pixel portion corresponding to another adjacent color. As a result, the diffused light intrudes into the pixel portion corresponding to the other color as stray light, and color mixing occurs in the pixel portion corresponding to the other color.
- the light emitted from the organic light emitting layer included in the pixel portion corresponding to the one color is the light emitted from the organic light emitting layer included in the pixel portion corresponding to the one color at the end of the partition inserted in the recess of the lens sheet
- the light traveling toward the pixel unit corresponding to the other color adjacent to the pixel unit corresponding to is possible to suppress stray light from entering the pixel portion corresponding to the other color through the sealing layer interposed between the plurality of pixel portions and the lens sheet. Therefore, it is possible to suppress the occurrence of color mixing in the pixel portion corresponding to the other color.
- a sealing layer for sealing the pixel portion can be disposed only above the lens sheet. Therefore, there is a risk that outgassing such as moisture and oxygen may be mixed in the plurality of pixel portions after the plurality of pixel portions are formed and before the sealing layer is formed above the lens sheet.
- the sealing layer is formed before the lens sheet is disposed after forming the plurality of pixel portions, the sealing layer is disposed above the lens sheet in comparison to the case where the sealing layer is disposed. It is possible to immediately block the entry of moisture and outgassing such as oxygen into a plurality of pixel portions.
- the sealing layer is interposed between the plurality of pixel units and the lens sheet, intrusion of the stray light into the pixel unit corresponding to the other color can be suppressed. It is possible to suppress the entry of stray light to the pixel portion corresponding to the other color while preventing the outgassing of the pixel portion from being mixed.
- the bottom surface of the partition inserted in the recess is a flat surface
- the peripheral surface of the partition inserted in at least the recess is black when the bottom surface of the partition is black Contains black.
- the bottom of the partition inserted in the recess is a flat surface, and the flat surface is black.
- the tip end of the partition inserted in the recess has a shape projecting toward the pixel unit, and the peripheral surface inserted in at least the recess of the partition.
- black includes that the side of the projecting shape of the tip is black.
- the tip of the partition inserted in the recess has a shape projecting toward the pixel portion, and the side surface of the tip having the protruding shape is black.
- the stray light of the light emitted from the pixel unit corresponding to the one color can be absorbed by the side surface of the tip of the partition inserted in the recess.
- a distance between the lower surface of the lens sheet and the organic light emitting layer included in the plurality of pixel portions and a distance between the lower surface of the lens sheet and the lower surface of the glass substrate is in the range of 1: 1 to 1: 8.
- the film thickness of the sealing layer interposed between the lens sheet and the plurality of pixel portions becomes sufficiently thin with respect to the distance between the lens sheet and the glass substrate, and accordingly the sealing layer The amount of stray light directed from the upper electrode of the pixel unit corresponding to the one color to the pixel unit corresponding to the other color can be reduced.
- the partition wall is formed between the respective lenses and within a predetermined range from an end of the formation region of the lenses.
- the partition wall is formed between the lenses and within a predetermined range from the end of the formation region of the lens.
- the partition wall is formed within a range of 0 ⁇ m or more and 54 ⁇ m or less from an end of a formation region of the lens.
- the partition wall is formed within a range of 0 ⁇ m or more and 54 ⁇ m or less from the end of the formation region of the lens.
- the side surface of the partition wall is black, and the partition wall is light emitted from the organic light emitting layer included in the one pixel portion and is reflected by the glass substrate The light traveling toward the pixel unit corresponding to the other color adjacent to the pixel unit corresponding to the one color is absorbed.
- the light emitted from the pixel unit corresponding to the one color is totally reflected by the glass substrate according to the incident angle to the glass substrate.
- the light emitted from the organic light emitting layer included in the pixel unit corresponding to the one color intrudes into the pixel unit corresponding to the other color adjacent to the pixel unit corresponding to the one color, and the other Color mixing occurs in the pixel portion corresponding to the color of.
- the side surface of the partition wall is black. Then, the partition wall absorbs light which is reflected by the glass substrate and travels to a pixel portion corresponding to another color adjacent to the pixel portion corresponding to the one color. Thus, light reflected by the glass substrate and directed to the light emitting area of the pixel unit corresponding to the other color can be suppressed, so that generation of color mixture in the pixel unit corresponding to the other color can be suppressed. As a result, the contrast of the image can be improved.
- the film thickness can be reduced. As a result, the light extraction efficiency of the display panel device can be improved.
- the partition walls further absorb external light incident on the one pixel portion from the outside of the device through the glass substrate. External light incident from the outside of the display panel device is absorbed through the glass substrate.
- the partition functions as a black matrix which is conventionally used as a part of a color filter, and can block external light entering from the outside of the display panel device from reaching the adjacent pixel part. Therefore, it can suppress that the said exterior light is reflected from the said transparent electrode, and is inject
- the film thickness of an organic EL element can be made thin by that much.
- the partition wall may extend from at least the base portion and be in contact with the glass substrate.
- the partition wall is provided to be in contact with the glass substrate.
- the partition completely blocks the space between the glass substrate and the base portion, so that the reflected light totally reflected by the glass substrate is adjacent to the pixel portion corresponding to the one color. It is possible to shut off the direction surely.
- the base portion is very thin with respect to the lens, and the shape of the lens is broken only at the base portion, and the shape of the lens can not be maintained. Therefore, conventionally, a base member for reinforcing the base portion is provided on the lower surface of the base portion.
- a base member for reinforcing the base portion is provided on the lower surface of the base portion.
- the lens sheet is fixed by the partition wall and the glass substrate. Therefore, the base member conventionally provided on the lower surface of the lens sheet can be eliminated, and the layer existing between the glass substrate and the pixel portion can be eliminated accordingly. As a result, it is possible to extract more light emitted from the organic light emitting layer of the pixel portion than in the conventional case, and light extraction efficiency can be improved.
- the recess may penetrate the lens sheet, and the partition may be inserted into the recess of the lens sheet to penetrate the lens sheet.
- the recess penetrates the lens sheet, and the partition penetrates the lens sheet.
- the area of the partition wall inserted in the hollow portion becomes larger, and accordingly, stray light to the pixel portion adjacent to the pixel portion corresponding to the one color can be absorbed more.
- the lens sheet and the glass substrate are stably fixed via the partition wall by penetrating the partition wall to the base portion. Therefore, it is not necessary to provide the base member under the lens sheet, and the layer existing between the glass substrate and the pixel portion can be reduced accordingly. As a result, it is possible to extract a large amount of light emitted from the organic light emitting layer of the pixel portion, and light extraction efficiency can be improved.
- the thickness of the base portion is 5 ⁇ m to 20 ⁇ m, and the distance between the organic light emitting layer and the bottom surface of the lens sheet is 2 ⁇ m or more. You may penetrate to the bottom of a part.
- the partition is penetrated to the bottom surface of the base portion It is.
- the partition penetrates the base at a depth at which the reflected light from the glass substrate is most blocked. Therefore, it is possible to optimally block the light emitted from the organic light emitting layer included in one pixel part partitioned by the partition from traveling toward the pixel part adjacent to the one pixel part by the reflection on the glass substrate. . As a result, the contrast of the image can be accurately improved.
- the sectional shape of the partition wall may be a shape in which the upper side is shorter than the base and the side is inclined.
- the partition since the cross-sectional shape of the partition is such that the upper side is shorter than the base and the side is inclined, the partition can be stably held.
- the cross-sectional shape of the partition wall may be a shape in which the upper side is longer than the base and the side is inclined.
- the cross-sectional shape of the partition may be a shape in which the upper side is longer than the base and the side is inclined.
- the plurality of pixel units include an organic light emitting layer that emits the same color along a predetermined direction, and the partition wall extends along the predetermined direction.
- the configuration may be such that the corresponding lenses are partitioned between the pixel units that emit different colors.
- the plurality of lenses are provided so as to cover the plurality of pixel units that emit the same color, and the partition wall is disposed between the pixel units which emit different colors along the predetermined direction. Between the lenses corresponding to.
- the lens may have an elongated arc shape in which the top view is elongated and a cross section orthogonal to the longitudinal direction has a predetermined curvature.
- the top view is elongated, and the cross section orthogonal to the longitudinal direction has an elliptical arc shape having a predetermined curvature.
- the plurality of pixel units are arranged in a grid, and the partition is provided between the plurality of lenses in the vertical direction and the horizontal direction of the grid. Good.
- the plurality of pixel units are provided in a lattice, and the partition wall is provided between the plurality of lenses in the longitudinal direction and the lateral direction of the lattice.
- the unevenness of the plurality of lenses formed over the upper surfaces of the plurality of lenses and formed by the plurality of lenses is planarized to bond the lens sheet and the glass substrate
- An adhesive layer may be provided, and the refractive index of the adhesive layer may be smaller than the refractive index of the plurality of lenses.
- an adhesive layer for adhering the lens sheet and the glass substrate is provided between the lens sheet and the glass substrate.
- the glass substrate forms an outer surface of the display panel device.
- the glass substrate may be an outer surface of the display panel device.
- the display panel apparatus includes a hole injection layer for injecting holes into the organic light emitting layer between the organic light emitting layer and the lower electrode.
- a hole injection layer for injecting holes into the organic light emitting layer is included between the organic light emitting layer and the lower electrode.
- a display device includes the display panel device.
- a lower electrode, an upper electrode, and an organic material interposed between the lower electrode and the upper electrode and emitting any one of red, green and blue light A first step of preparing a plurality of pixel units including a light emitting layer, a second step of forming a sealing layer for sealing the plurality of pixel units above the upper electrode, and the plurality of pixel units
- a lens member having a plurality of lenses provided corresponding to each of the plurality of lenses and a base portion which is a base on which the plurality of lenses are formed, the base member reinforcing the base portion being the above-mentioned base portion
- the base portion is very thin relative to the lens, and the shape of the lens is broken only at the base portion, and the shape of the lens can not be maintained. Therefore, conventionally, a base member for reinforcing the base portion is provided on the lower surface of the base portion.
- a base member for reinforcing the base portion is provided on the lower surface of the base portion.
- the base member is peeled off.
- the lens sheet is fixed by the partition wall and the glass substrate, the lens can maintain its shape even if the base member is peeled off. Therefore, since the base member can be peeled off from the lens sheet, the layer between the glass substrate and the pixel portion can be reduced accordingly.
- the display panel device manufactured according to the present manufacturing process it is possible to extract more light emitted from the organic light emitting layer of the pixel portion than in the related art, and light extraction efficiency can be improved. .
- the fifth step is a step of penetrating the recess and forming a hole between the plurality of lenses for penetrating the partition wall.
- the partition may be provided to penetrate the base.
- the partition in the manufacturing process of a display panel device, when forming the partition in the lens sheet and penetrating the base, the partition is not only adhered to the upper surface of the base, but the partition is the base
- the partition wall can be stably held between the plurality of lenses.
- FIG. 1 is a plan view of a display panel apparatus according to Embodiment 1 of the present invention.
- the glass substrate 24 and the contact bonding layer 27 which are uppermost layer parts are not shown in figure for description.
- the display panel apparatus 1 includes a plurality of light emitting regions formed in a row direction and in a column direction orthogonal to the row direction, that is, in a matrix.
- Each of the plurality of light emitting regions includes a light emitting pixel portion (hereinafter, referred to as “pixel portion”) 12 for each light emitting region. Therefore, a plurality of pixel portions 12 are arranged in the row direction and in the column direction orthogonal to the row direction according to the light emitting region, that is, in a matrix.
- the plurality of pixel units 12 include a pixel unit 12R that emits red light (hereinafter referred to as “red pixel unit”) and a pixel unit 12G that emits green light (hereinafter referred to as “green pixel unit” And a pixel portion 12B that emits blue light (hereinafter referred to as "blue pixel portion").
- red pixel unit that emits red light
- green pixel unit that emits green light
- blue pixel portion 12B that emits blue light
- the plurality of pixel units 12 that emit light of three colors pixel units that emit light of the same color are repeatedly arranged in the column direction, and form a stripe.
- the red pixel portion 12R, the green pixel portion 12G, and the blue pixel portion 12B are repeatedly arranged in this order.
- the light emitting region includes the red pixel portion 12R, the green pixel portion 12G, and the blue pixel portion 12B, and is a region in which light is emitted.
- a light emitting region corresponding to the red pixel portion 12R is a red light emitting region
- a light emitting region corresponding to the green pixel portion 12G is a green light emitting region
- a light emitting region corresponding to the blue pixel portion 12B is a blue light emitting region.
- a region between the blue pixel portion 12B and the next red pixel portion 12R ' is a non-light emitting region in which the pixel portion 12 is not formed and light is not emitted.
- a lens 22 is formed for each pixel unit 12 so as to correspond to each pixel unit 12.
- the lens 22 is for focusing the light emitted from the organic light emitting layers of the red pixel unit 12R, the green pixel unit 12G, and the blue pixel unit 12B.
- the lens corresponding to the red pixel portion 12R is referred to as a red lens 22R
- the lens corresponding to the green pixel portion 12G is referred to as a green lens 22G and a lens corresponding to the blue pixel portion 12B as a blue lens 22B.
- a partition wall 25 is provided between the lenses 22 corresponding to the pixel sections 12.
- the partition wall 25 is provided so that light of different colors is not mixed in light emitting regions adjacent to each other in the row direction. That is, the partition wall 25 is provided between the red lens 22R and the green lens 22G and between the green lens 22G and the blue lens 22B. In other words, the partitions 25 are provided on both sides of each lens 22 so as to sandwich the lenses 22 of the red lens 22R, the green lens 22G, and the blue lens 22B.
- the plurality of pixel portions include the organic light emitting layer 11 emitting the same color along the predetermined direction, and the partition 25 corresponds between the pixel portions emitting different colors along the predetermined direction. Partition between lenses.
- the plurality of lenses are provided so as to cover the plurality of pixel portions emitting the same color
- the partition 25 is a lens corresponding to the space between the pixel portions emitting different colors along the predetermined direction. It is what divides between.
- each lens 22 is disposed to correspond to each one of the pixel units 12, but the lenses 22 are common to the pixel units 12 of the same color formed in the column direction. It is also possible to use a lenticular lens which is a lens of
- FIG. 2 is a cross-sectional view of the display panel apparatus according to the first embodiment of the present invention cut along the line X-X 'shown in FIG.
- the display panel device 1 As shown in FIG. 2, the display panel device 1 according to the first embodiment of the present invention has a configuration in which the organic EL unit 10 and the lens unit 20 are bonded together via the sealing resin 30.
- the organic EL unit 10 includes a first electrode 14 (lower electrode), a hole injection layer 15, and an intermediate layer 16 on the substrate 13 on which a planarization film (not shown) is formed in each of the pixel units 12R, 12G, and 12B.
- the organic light emitting layer 11, the electron transport layer 17, the second electrode 18 (upper electrode), and the sealing thin film 19 are sequentially formed.
- the substrate 13 on which the planarizing film is formed is formed of a thin film transistor (hereinafter referred to as "TFT") layer (not shown) formed on the substrate and a planarizing film for planarizing the upper surface thereof.
- TFT thin film transistor
- the first electrode 14 may be, for example, a reflective electrode to be an anode, and is separately formed for each pixel portion. That is, the first electrode 14 is formed corresponding to each of the red pixel unit 12R, the green pixel unit 12G, and the blue pixel unit 12B.
- the hole injection layer 15 has a function of facilitating the injection of holes into the intermediate layer 16, and is formed of a predetermined organic material.
- the intermediate layer 16 has a function of facilitating the injection of holes into the organic light emitting layer 11, and is formed of a predetermined organic material.
- the hole injection layer 15 and the intermediate layer 16 are separately formed in each pixel portion.
- the organic light emitting layer 11 which emits predetermined light includes an organic light emitting layer 11R which emits red light (hereinafter referred to as “red organic light emitting layer”) and an organic light emitting layer 11G which emits green light (hereinafter, referred to as The light emitting layer includes a “green organic light emitting layer” and an organic light emitting layer 11B that emits blue light (hereinafter, referred to as “blue organic light emitting layer”).
- the red organic light emitting layer 11R, the green organic light emitting layer 11G, and the blue organic light emitting layer 11B are included in the red pixel unit 12R, the green pixel unit 12G, and the blue pixel unit 12B, respectively.
- the pixel unit 12 in the organic EL unit 10 includes the first electrode 14 and the second electrode 18, and each organic light emitting layer of the red organic light emitting layer 11R, the green organic light emitting layer 11G and the blue organic light emitting layer 11B is It is interposed between the first electrode 14 and the second electrode 18.
- the organic light emitting layer 11 is formed of an organic material having a predetermined electroluminescent function for each pixel portion 12.
- the organic light emitting layer 11 is separately formed for each pixel unit 12, and as described above, the red organic light emitting layer 11R and the green organic light emitting layer 11G are provided to the red pixel unit 12R, the green pixel unit 12G and the blue pixel unit 12B, respectively. And the blue organic light emitting layer 11B.
- the electron transport layer 17 has a function of facilitating the injection of electrons into the organic light emitting layer 11, and is formed of a predetermined organic material.
- the second electrode 18 is, for example, a transparent electrode to be a cathode, and may be formed of a conductive material such as ITO (indium tin oxide) so as to face the first electrode 14.
- the second electrode 18 is a common electrode common to the pixel units 12R, 12G, and 12B.
- the sealing thin film 19 and the sealing resin 30 on the sealing thin film 19 are a sealing layer for sealing the organic EL unit 10, and are formed of, for example, a thin transparent insulating material.
- the organic material having an electroluminescent function contained in the organic light emitting layer 11 is susceptible to moisture and oxygen, and is prone to deterioration and degradation. Therefore, it is important to seal the organic EL unit 10 and prevent moisture and oxygen from entering the organic EL unit 10.
- a bank BNK is provided between the pixel units 12R, 12G, and 12B for dividing the first electrode 14, the hole injection layer 15, the intermediate layer 16, and the organic light emitting layer 11 into pixel units 12. There is.
- the bank BNK is formed of, for example, a photosensitive resin. In the non-light emitting region where the organic light emitting layer 11 is not formed, the wiring LN is formed on the substrate 13.
- the lens unit 20 includes a lens sheet 23 including the lens 22 and a glass substrate 24 (cover plate). Furthermore, the lens unit 20 includes a partition 25. Further, an adhesive layer 27 is formed between the lens sheet 23 and the glass substrate 24.
- the lens sheet 23 is disposed so as to be interposed between the pixel portion 12 (organic EL portion 10) and the glass substrate 24, and a base portion 28 (a base on which the lens 22 and the lens 22 are formed to protrude). And a base portion).
- the lens sheet 23 has a plurality of lenses 22 formed of an acrylic resin such as a polymethyl methacrylate resin (methacrylic resin), for example, formed on one surface of a sheet-like base portion 28.
- the lenses 22 are formed to correspond to all the pixel units 12R, 12G, and 12B, and one lens 22 is formed to correspond to one pixel unit 12.
- a red lens 22R is formed for the red pixel portion 12R
- a green lens 22G and a blue lens 22B are formed for the green pixel portion 12G and the blue pixel portion 12B.
- the lights emitted from the organic light emitting layers 11R, 11G, and 11B can be condensed by the lenses 22R, 22G, and 22B of the pixel units 12R, 12G, and 12B. Thereby, light extraction efficiency can be improved.
- each lens 22 may be, for example, an elliptical arc shape having a predetermined curvature, as shown in FIG.
- the shape of the lens 22 when the display panel device 1 is viewed in plan is a rectangular shape elongated in the column direction as shown in FIG. That is, the lens 22 has a semi-cylindrical shape.
- each lens 22 is disposed to correspond to each one of the pixel units 12, but is common to the pixel units 12 of the same color formed in the column direction It is also possible to use a lenticular lens which is a lens of
- the glass substrate 24 is provided on the top layer of the lens unit 20. Further, the glass substrate 24 constitutes the outer surface of the display panel device 1, and light emitted from each organic light emitting layer 11 of each pixel section 12 is emitted to the outside of the display panel device 1 through the glass substrate 24. Ru.
- the adhesive layer 27 is formed over the upper surfaces of the plurality of lenses, and the adhesive layer 27 is provided to planarize the unevenness of the plurality of lenses formed by the plurality of lenses and to bond the lens sheet 23 and the glass substrate 24. Also, the refractive index is smaller than the refractive index of the plurality of lenses.
- partition walls 25 are provided which partition the lenses corresponding to the respective pixel portions 12.
- the partition wall 25 is disposed between the lens sheet 23 and the glass substrate 24.
- the glass substrate side end of the partition wall 25 is configured to be in contact with the glass substrate 24. Therefore, the height of the partition 25 from the base 28 of the lens sheet 23 is higher than that of the lens 22.
- the base side end of the lens sheet 23 is embedded in the recess 29 provided in the base 28 of the lens sheet 23, and the peripheral surface of the partition 25 inserted in at least the recess 29 is blackened.
- the recess 29 is a recess which is recessed in the direction opposite to the direction in which the lens 22 protrudes from the surface of the base 28.
- the recess 29 is formed along the outer periphery of the area of the base 28 where the lens 22 is provided. That is, when the display panel device 1 is viewed in a plan view, the depressions 29 have a stripe shape along a portion along the column direction of the outer peripheral portion of the lens 22 in the lens formation region of the base 28.
- the sealing thin film 19 and the sealing resin 30 are provided between the organic EL unit 10 and the lens unit 20. Therefore, the path (the distance A in FIG. 2) of light from the second electrode 18 (upper electrode) to the base portion 28 of the lens sheet 23 increases by the amount by which the sealing thin film 19 and the sealing resin 30 intervene. Due to this, the reflected light generated at the interface between the sealing thin film 19 and the sealing resin 30 and the layers above and below and scattering in each layer existing from the organic light emitting layer 11 to the base portion 28 of the lens sheet 23 The generated scattered light becomes stray light in the panel and enters the adjacent pixel portion 12. Then, stray light of different colors adjacent to each other is emitted from a certain pixel portion, which causes a problem of lowering the contrast of the image.
- the partition wall 25 is provided between the lenses 22 corresponding to the pixel units 12 as described above. That is, the partitions 25 are provided on both sides of each lens 22 so as to sandwich the lenses 22 of the red lens 22R, the green lens 22G, and the blue lens 22B.
- FIG. 3 is a view schematically showing a state in which the partition wall 25 absorbs light emitted from the organic light emitting layer to prevent stray light in the cross section of the display panel device according to the first embodiment of the present invention.
- the recess 29 is recessed from the surface of the base 28 of the lens sheet 23 in the direction opposite to the direction in which the lens 22 protrudes along the outer periphery of the area of the base 28 of the lens sheet 23 where the lens 22 is provided. It is formed.
- the partition 25 is inserted into the recess 29 of the lens sheet 23, and at the same time, the peripheral surface of at least the recess 29 of the partition 25 is blackened.
- the tip end of the partition 25 inserted into the recess 29 can absorb the stray light. Therefore, it is possible to suppress stray light from entering the pixel unit 12 corresponding to another color from the upper electrode 18 of the pixel unit corresponding to one color.
- light not advancing in the direction of the pixel portion corresponding to the other color (solid arrow in FIG. 3) passes through the glass substrate 24 from the pixel portion corresponding to one color as it is and is emitted to the outside.
- the light emitted from the pixel portion corresponding to one color passes through the sealing thin film 19 and the sealing resin 30 from the upper electrode 18 of the pixel portion corresponding to one color due to the existence of the distance A.
- the light is diffused in the direction of the pixel portion corresponding to another color adjacent to the pixel portion corresponding to one color.
- the diffused light intrudes into the pixel portions corresponding to the other colors as stray light, and color mixing occurs in the pixel portions corresponding to the other colors.
- the light emitted from the organic light emitting layer 11 included in the pixel portion corresponding to one color is the light emitted from the organic light emitting layer 11 at the front end portion of the partition 25 inserted into the hollow portion 29 of the lens sheet 23
- stray light can be prevented from entering the pixel portions corresponding to other colors through the sealing thin film 19 and the sealing resin 30 interposed between the plurality of pixel portions 12 and the lens sheet 23 . Therefore, it is possible to suppress the occurrence of color mixing in pixel portions corresponding to other colors.
- a sealing layer for sealing can only be disposed above the lens sheet. Therefore, outgassing such as moisture and oxygen may be mixed into the plurality of pixel portions after the plurality of pixel portions are formed and the sealing layer is formed above the lens sheet.
- the sealing thin film 19 and the sealing resin 30 are formed before the lens sheet 23 is disposed after forming the plurality of pixel portions, the case where the sealing layer is disposed above the lens sheet In comparison, it is possible to quickly block the mixing of outgassing such as moisture and oxygen into a plurality of pixel portions.
- the sealing thin film 19 and the sealing resin 30 are interposed between the plurality of pixel units 12 and the lens sheet 23, it is possible to suppress the entry of stray light into the pixel units corresponding to other colors. Thus, it is possible to prevent the entry of stray light into pixel portions corresponding to other colors while preventing the outgassing of the plurality of pixel portions 12 from being mixed.
- the bottom surface of the partition 25 inserted into the recess 29 includes, for example, a flat surface. Further, that the peripheral surface inserted in at least the recess portion 29 of the partition 25 is black includes, for example, that the bottom surface of the partition 25 is black.
- the bottom surface of the partition 25 inserted into the recess 29 is a flat surface, stray light diffused toward pixel parts corresponding to other colors is reflected by the bottom surface of the partition 25 unless the flat surface is black.
- stray light reflected by the bottom of the partition 25 penetrates into the pixel units corresponding to the other colors, and color mixing occurs in the pixel units of the other colors. That is, by making the bottom of the partition 25 inserted in the recess 29 flat and making this flat black, stray light diffused toward pixel parts corresponding to other colors can be absorbed by the bottom of the partition 25. It is possible to prevent stray light from being reflected at the bottom of the partition wall 25. As a result, the occurrence of color mixing in pixel portions corresponding to other colors can be suppressed more effectively.
- FIG. 4 is a cross-sectional view of the lens unit 20 of the display panel device according to Embodiment 1 of the present invention, in which the light emitted by the organic light emitting layer 11 is reflected by the interface B between the adhesive layer 27 and the glass substrate 24 and It is a figure which shows advancing of the reflected light reflected in the interface C of the glass substrate 24 and the external air.
- the light emitted from the organic light emitting layer 11 of the pixel portion corresponding to one color is reflected at the interface B between the adhesive layer 27 and the glass substrate 24 in accordance with the incident angle to the glass substrate 24. Further, the light is also reflected at the interface C between the glass substrate 24 and the outside air. As a result, the light emitted from the organic light emitting layer 11 included in the pixel unit corresponding to the one color intrudes into the pixel unit corresponding to the other color adjacent to the pixel unit corresponding to the one color, Color mixing occurs in pixel portions corresponding to other colors.
- the partition wall 25 is provided between the glass substrate 24 and the lens sheet 23 so that the height thereof is at least higher than the height of the lens 22.
- the partition wall 25 divides between the lenses corresponding to the pixel portions of different colors to be emitted.
- light (solid arrows in FIG. 4) emitted from the pixel portion corresponding to one color and reflected by the interface B between the adhesive layer 27 and the glass substrate 24 is emitted to the pixel portion corresponding to one color.
- the partition wall 25 provided between the respective lenses can block the movement toward the pixel portion corresponding to the other adjacent color.
- the light reflected by the interface C between the glass substrate 24 and the outside air (dotted line arrow in FIG.
- the side surface of the partition wall 25 is black. Then, the partition wall 25 absorbs light which is reflected by the interface B between the adhesive layer 27 and the glass substrate 24 and travels to a pixel portion corresponding to another color adjacent to the pixel portion corresponding to the one color. In addition, the partition wall 25 absorbs light which is reflected by the interface C between the glass substrate 24 and the outside atmosphere and travels to a pixel unit corresponding to another color adjacent to the pixel unit corresponding to the one color. Thereby, light reflected at the interface between the adhesive layer 27 and the glass substrate 24 can be suppressed from traveling toward the light emitting area of the pixel portion corresponding to the other color, so that color mixing occurs in the pixel portion corresponding to the other color. Can be suppressed. As a result, the contrast of the displayed image can be improved.
- the portion of the entire organic EL panel can be reduced.
- FIG. 5 is a view showing the progress of external light in the cross section of the display panel apparatus according to Embodiment 1 of the present invention.
- the tip end of the partition wall 25 absorbs external light (solid arrow in FIG. 5) incident from the outside of the display panel device through the glass substrate 24.
- the tip of the partition wall 25 functions as a black matrix which is conventionally used as a part of a color filter, so that external light entering from the outside of the display panel device can be prevented from reaching a plurality of pixel portions. Can. Therefore, it is possible to suppress external light from being reflected on the surface of the reflective electrode as the lower electrode 14 and the surface of the transparent electrode as the upper electrode 18 and emitted to the outside, and the contrast of the image can be improved.
- the partition wall 25 provided between the respective lenses has a function of absorbing stray light emitted from the organic light emitting layer 11 and generated by scattering or the like by the sealing thin film 19 (FIG. 3), reflected light from the glass substrate 24 4 functions as the function to block the light (FIG. 4) and the function to absorb the external light (FIG. 5) by one member. Therefore, the contrast ratio of the display image can be significantly improved. Further, it is not necessary to separately provide separate members for achieving each function, and the number of members constituting the display panel device can be reduced, and the film thickness of the organic EL element can be reduced accordingly. As a result, the manufacturing cost of the display panel device can be reduced and the light extraction efficiency can be improved.
- the partition wall 25 may extend at least from the base portion 28 and may be in contact with the glass substrate 24.
- the partition wall 25 is provided in contact with the glass substrate 24. Therefore, since the partition 25 completely blocks between the glass substrate 24 and the base portion 28, the reflected light reflected by the interface between the glass substrate 24 and the adhesive layer 27 corresponds to the pixel portion corresponding to one color. It is possible to reliably block the movement to the adjacent pixel portion.
- the partition wall 25 does not have to be in contact with the glass substrate 24 of the lens unit 20.
- the partition wall 25 may be formed apart from the glass substrate 24 of the lens unit 20 to such an extent that the stray light and the reflected light from the glass substrate and the external light can be absorbed and blocked.
- the cross-sectional shape of the partition wall 25 in the in-plane vertical direction of the display panel device 1 may be, for example, a shape in which the upper side is shorter than the base and the side is inclined. According to this aspect, since the cross-sectional shape of the partition wall 25 has a shape in which the upper side is shorter than the base side and the side side is inclined, the partition wall can be stably held.
- the cross-sectional shape of the partition wall 25 in the in-plane vertical direction of the display panel device 1 may be a shape in which the upper side is longer than the base and the side is inclined.
- the cross-sectional shape of the partition wall 25 may be a shape in which the upper side is longer than the base and the side is inclined.
- FIG. 9 is a cross-sectional view of the display panel apparatus according to the first embodiment of the present invention cut along the Y-Y 'line shown in FIG.
- the distance from the organic light emitting layer 11 included in the organic EL unit 10 to the bottom surface of the partition 25 embedded in the base 28 of the lens sheet 23 included in the lens unit 20 is a.
- the distance from the bottom surface of the partition 25 embedded in the base 28 of the lens sheet 23 included in the lens unit 20 to the upper surface of the partition 25 is b.
- the film thickness of the sealing thin film 19 and the sealing resin 30 interposed between the lens sheet 23 and the plurality of pixel portions becomes sufficiently thin with respect to the distance between the lens sheet 23 and the glass substrate 24.
- the amount of stray light traveling from the upper electrode 18 of the pixel unit corresponding to one color to the pixel unit corresponding to another color can be reduced via the division thin film 19 and the sealing resin 30.
- FIG. 10 is a cross-sectional view of the lens sheet 23 in the present embodiment.
- the lens sheet 23 comprises a lens 22 and a base 28.
- Each lens 22 may have, for example, substantially the same shape and substantially the same size. That is, the red lens 22R, the green lens 22G, and the blue lens 22B may have substantially the same shape and the same size.
- Each lens 22 is formed only on one surface of the base 28.
- the lens height h1 may be 43 ⁇ m.
- the dimension may be 3 ⁇ m.
- the distance w2 of the non-light emitting region between the blue lens 22B corresponding to the blue pixel portion 12B and the red lens 22R 'corresponding to the red pixel portion 12R' may be 54 ⁇ m.
- the lens sheet 23 comprises the lens 22 and the base portion 28.
- Each lens 22 is formed on the base portion 28 so that each lens 22 forms a lens sheet 23 as an integral body. Therefore, the physical strength of the lens sheet 23 is determined by the film thickness of the base portion 28.
- the recessed portion 29 is formed in the base portion 28 of the lens sheet 23, and the partition 25 is embedded in the recessed portion 29 to increase the physical strength of the lens sheet 23. It can be made thinner.
- the film thickness of the base portion 28 of the lens sheet 23 is reduced, the light extraction efficiency in the case of using the base portion 28 of such a lens sheet 23 is also improved in proportion to this. This point will be described in detail using a graph showing the relationship between the thickness difference amount of the film thickness of the base portion 28 in FIG. 8 and the light extraction efficiency to the outside through the base portion 28.
- FIG. 11 shows that the film thickness of the base portion 28 of the lens sheet 23 to the outside through the base portion 28 by the increase / decrease of the film thickness (the thickness difference amount of the base portion film thickness) with respect to a certain reference thickness. It is the graph which showed how light extraction efficiency (outside extraction efficiency) changes. Further, when the thickness of the base portion 28 of the lens sheet 23 is 0 and the thickness of a certain reference is 0, the light extraction efficiency to the outside is 1. It can be seen from FIG. 8 that the light extraction efficiency to the outside is improved as the thickness difference amount of the film thickness of the base portion 28 is negative, that is, the thin film.
- the film thickness of the base portion 28 of the lens sheet 23 which is a path of light emitted by the organic light emitting layer 11 be as thin as possible.
- the dent portion 29 is formed in the base portion 28 of the lens sheet 23, and the partition 25 is embedded in the dent portion 29 to enhance the physical strength of the lens sheet 23.
- the film thickness of 28 can be reduced to improve the light extraction efficiency to the outside through the base portion 28.
- the partition 25 may be formed so that each lens 22 may be enclosed. That is, the partition walls 25 may be formed in a lattice shape. Thus, it is possible to block stray light of the same color entering different pixels adjacent in the column direction between different pixels of the same color in the column direction. As a result, the bright and dark display of the pixels becomes clear, and the contrast ratio of the display image is improved.
- the partition wall 25 so as to surround each lens 22, it is possible to clarify the brightness display of pixels and to improve the contrast ratio of the display image.
- FIG. 13 is a partially enlarged cross-sectional view of a display panel device according to Modification 1 (Embodiment 2) of Embodiment 1 of the present invention.
- the tip of the partition 25 inserted into the recess 29 has a shape projecting toward the organic EL unit 10, and at least the peripheral surface inserted into the recess 29 and the projecting shape of the tip
- the side may be black.
- the recess 29 provided in the lens sheet 23 is formed in accordance with the shape of the tip of the partition 25.
- the tip of the partition 25 inserted into the recess 29 may have a shape projecting toward the organic EL unit 10, and the side of the tip having the projecting shape may be black. Thereby, the side surface of the tip of the partition 25 inserted into the recess 29 can absorb the stray light of the light emitted from the pixel unit corresponding to one color.
- the light entering the adjacent light emitting area through the base portion 28 of the lens sheet 23 is absorbed by the front end portion inserted into the lens sheet 23 of the partition 25 and the progress thereof is blocked. Moreover, with this configuration, even the lens sheet 23 whose strength is reduced by the formation of the depressions 29 can maintain its shape.
- the tip end of the partition 25 is shaped so as to protrude toward the organic EL unit 10, so that when the partition 25 is inserted into the recess 29 formed in the base 28 of the lens sheet 23, the tip of the partition 25 is The part performs the function of self alignment moving along the side of the recess 29.
- the detail of the process of inserting the partition 25 in the said hollow part 29 is mentioned later.
- the tip of the partition 25 inserted into the recess 29 has a shape projecting toward the organic EL unit 10, and at least the peripheral surface inserted into the recess 29 and the side surface of the tip projecting are black By this, it is possible to simplify the manufacture of the display panel device while absorbing stray light.
- FIG. 14 is a partially enlarged cross-sectional view of a display panel apparatus according to a second modification (third embodiment) of the first embodiment of the present invention.
- the recess 29 penetrates the lens sheet 23, and the partition 25 may be inserted into the recess 29 of the lens sheet 23 and penetrate the lens sheet 23.
- the recess 29 penetrates the lens sheet 23, and the partition 25 penetrates the lens sheet 23.
- the area of the partition 25 inserted into the recess 29 is enlarged, and accordingly, stray light to the pixel part adjacent to the pixel part corresponding to one color can be absorbed more.
- the lens sheet 23 and the glass substrate 24 are stably fixed via the partition wall 25. Therefore, it is not necessary to provide a base member under the lens sheet 23, and the layer existing between the glass substrate 24 and the organic EL unit 10 can be reduced accordingly. As a result, a large amount of light emitted from the organic light emitting layer 11 of the organic EL unit 10 can be extracted, and the light extraction efficiency can be improved.
- the partition 25 is used.
- the bottom of the base 28 may be penetrated.
- the partition 25 is penetrated to the bottom surface of the base portion 28 It is.
- the partition 25 penetrates the base portion 28 at a depth at which the reflected light from the glass substrate 24 is blocked most. Therefore, it is possible to optimally block the light emitted from the organic light emitting layer 11 included in one pixel part partitioned by the partition 25 from traveling toward the pixel part adjacent to the one pixel part by the reflection on the glass substrate 24. . As a result, the contrast of the display image can be accurately improved.
- FIG. 15 is a flowchart showing a method 1 of manufacturing a display panel device according to Embodiment 1 of the present invention.
- 16A to 16I are cross-sectional views of components constituting the display panel device in each process of manufacturing method 1 of the display panel device according to the first embodiment of the present invention.
- a plurality of organic EL units 10 including the red organic light emitting layer 11R, the green organic light emitting layer 11G and the blue organic light emitting layer 11B are formed (S101).
- a sealing thin film 19 which is a sealing layer for sealing the organic EL unit 10 including the plurality of pixel units 12 is formed above the second electrode 18 (S102). Thereby, the organic EL unit 10 sealed by the sealing thin film 19 can be prepared.
- the partition wall 25 is formed on the glass substrate 24 (S103).
- a sheet-like base member is provided on the side of the base 28 opposite to the side on which the lens 22 is provided. 40 is pasted together (S104).
- the lens 22 of the lens sheet 23 is made of an acrylic resin such as polymethyl methacrylate resin (methacrylic resin).
- the base 28 of the lens sheet 23 was made of polyethylene terephthalate (PET).
- PET polyethylene terephthalate
- the material of the base portion 28 may be the same as that of the lens 22.
- polycarbonate was used as the base member 40.
- the lens 22 corresponds to the pixel units 12 of the red light emitting region, the green light emitting region, and the blue light emitting region of the organic EL unit 10 in order from the left.
- the lens 22 does not exist in the fourth area from the left because it corresponds to the non-emission area.
- the surface of the base portion 28 of the lens sheet 23 on the side on which the lenses 22 are provided is in the form of stripes along the periphery of the area where the lenses 22 are provided.
- a predetermined plurality of depressions 29 are formed (S105).
- the recess 29 has a planar cross section which is recessed from the surface of the base 28 in the direction opposite to the direction in which the lens 22 protrudes.
- the partition 25 and the recess 29 formed on the glass substrate 24 are disposed facing each other directly above (S106).
- the partition 25 formed on the glass substrate 24 is inserted into the recess 29 formed on the base 28 of the lens sheet 23 (S107).
- the partition wall 25 may be disposed right above the recess 29 and the glass substrate 24 and the base member 40 may be provided with an alignment mark so that the partition wall 25 can be inserted. Thereby, the partition 25 can be inserted without being deviated from the recess 29.
- an adhesive is enclosed between the lens sheet 23 and the glass substrate 24 to bond the lens sheet 23 and the glass substrate 24 (S108).
- the adhesive is poured so as to flow from the side.
- the injected adhesive is filled between the lens sheet 23 and the glass substrate 24 by capillary action.
- the adhesive layer 27 is formed between the lens sheet 23 and the glass substrate 24.
- the base member 40 is peeled off from the lens sheet 23 (S109).
- the lens unit 20 is completed by this process.
- the peeling of the base member 40 was performed, for example, by dissolving the base member 40 using sodium peroxide.
- the combination of the base member 40 and the reagent for peeling the base member 40 is not limited to this combination as long as the base member 40 can be appropriately peeled without damaging the lens sheet 23 or the like.
- step S101 and step S102 the organic EL unit 10 prepared in step S101 and step S102 is disposed, and the lens unit 20 completed in step S109 is disposed above the organic EL unit 10 (see FIG. S110).
- an adhesive as the sealing resin 30 is injected on the upper surface of the sealing thin film 19 of the organic EL unit 10, and the sealing thin film 19 and the base 28 of the lens sheet 23 And are bonded (S111).
- the organic EL unit 10 and the lens unit 20 are bonded together by the sealing resin 30.
- the display panel device 1 according to the present embodiment can be completed.
- the partition 25 is provided on the lens sheet 23. Therefore, since the lens sheet 23 can be prevented from bending in the manufacturing process such as when the partition 25 is provided, it is possible to prevent the deterioration of the optical characteristics of the lens sheet 23 caused by the bending of the lens sheet 23.
- the display panel device 1 manufactured by the manufacturing method of this aspect needs to provide a reinforcing member for reinforcing the lens sheet 23 such as the base member 40 between the glass substrate 24 and the organic EL unit 10. As a result, the layers existing between the glass substrate 24 and the organic EL unit 10 can be reduced. As a result, it is possible to obtain the display panel device 1 capable of improving the light extraction efficiency.
- the display panel device according to the second embodiment is the same as the above-described manufacturing method, in the process of FIG. 16E, the front end of the partition 25 has a shape projecting toward the organic EL unit 10.
- the tip of the partition 25 performs a self-alignment function of moving along the side surface of the recess 29. This can simplify the manufacture of the display panel device.
- the partition wall 25 penetrates the base portion 28 of the lens sheet 23 in the step of FIG. 16C. Specifically, when the recess 29 is formed, the recess 29 is formed to penetrate the base 28. Further, in step S103 of FIG. 15, the height of the partition 25 is formed in accordance with the depth of the recess 29. Thereby, it is possible to obtain a structure in which the partition 25 in the display panel device according to Embodiment 3 penetrates the base portion 28 of the lens sheet 23.
- the display panel apparatus can be used as a flat panel display or the like, and any display such as a television set, a mobile phone, a personal computer, etc. as shown in FIG. It can be applied to the device.
- the display panel device and the method of manufacturing the display panel device according to the present invention have been described above based on the embodiment, the display panel device and the method of manufacturing the display panel device according to the present invention It is not limited to the form of The embodiments obtained by applying various modifications to those skilled in the art to the embodiments, and embodiments realized by arbitrarily combining the components and functions in the embodiments without departing from the spirit of the present invention are also presented. Included in the invention.
- the display panel device according to the present invention can be used as any display device such as a television set, a portable telephone, a personal computer and the like.
- Reference Signs List 1 display panel device 10 organic EL unit 11 organic light emitting layer 11R red organic light emitting layer 11G green organic light emitting layer 11B blue organic light emitting layer 12 pixel unit 12R red pixel unit 12G green pixel unit 12B blue pixel unit 13 substrate 14 first electrode (lower part electrode) 15 hole injection layer 16 intermediate layer 17 electron transport layer 18 second electrode (upper electrode) 19 sealing thin film 20 lens part 22 lens 22R red lens 22G green lens 22B blue lens 23 lens sheet 24 glass substrate (cover plate) 25 partition wall 27 adhesive layer 28 base portion (base portion) 29 hollow portion 30 sealing resin 40 base member BNK bank LN wiring 1000 OLED display 1001 substrate 1002 bottom electrode 1003 hole transport layer 1004 light emitting layer 1005 electron transport layer 1006 common light transmitting electrode 1007 conductive layer 1008 insulating layer 1009 light scattering Material 1010 Light transmission cover 1011 gap
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Abstract
Description
本態様によると、前記隔壁は前記ガラス基板を介して前記表示パネル装置の外部から入射する外光を吸収する。これにより、前記隔壁は、従来カラーフィルタの一部として用いられているブラックマトリクスとして機能し、前記表示パネル装置の外部から入り込む外光が前記隣接する画素部に到達するのを遮断できる。そのため、前記外光が前記透明電極から反射して外部に射出されるのを抑制できる。その結果、画像のコントラストを向上できる。
まず、本発明の実施の形態1に係る表示パネル装置について説明する。図1は、本発明の実施の形態1に係る表示パネル装置の平面図である。なお、説明のため最上層部分であるガラス基板24及び接着層27は図示していない。
次に、本発明の実施の形態2に係る表示パネル装置について、図13を用いて説明する。図13は、本発明の実施の形態1の変形例1(実施の形態2)に係る表示パネル装置の一部拡大断面図である。なお、図2に示す本発明の実施の形態1に係る表示パネル装置と同じ構成については同じ符号を付し、その説明は省略する。
次に、本発明の実施の形態3に係る表示パネル装置について、図14を用いて説明する。図14は、本発明の実施の形態1の変形例2(実施の形態3)に係る表示パネル装置の一部拡大断面図である。なお、図2に示す本発明の実施の形態1に係る表示パネル装置と同じ構成については同じ符号を付し、その説明は省略する。
次に、本発明の実施の形態1に係る表示パネル装置1を一例にして、その製造方法1について、図15及び図16A~図16Iを参照して説明する。図15は、本発明の実施の形態1に係る表示パネル装置の製造方法1を示したフローチャートである。また、図16A~図16Iは、発明の実施の形態1に係る表示パネル装置の製造方法1の各工程における、表示パネル装置を構成する構成要素の断面図である。
10 有機EL部
11 有機発光層
11R 赤色有機発光層
11G 緑色有機発光層
11B 青色有機発光層
12 画素部
12R 赤色画素部
12G 緑色画素部
12B 青色画素部
13 基板
14 第1電極(下部電極)
15 正孔注入層
16 中間層
17 電子輸送層
18 第2電極(上部電極)
19 封止薄膜
20 レンズ部
22 レンズ
22R 赤色用レンズ
22G 緑色用レンズ
22B 青色用レンズ
23 レンズシート
24 ガラス基板(カバープレート)
25 隔壁
27 接着層
28 基底部(ベース部)
29 窪み部
30 封止樹脂
40 ベース部材
BNK バンク
LN 配線
1000 OLEDディスプレイ
1001 基板
1002 底部電極
1003 正孔輸送層
1004 発光層
1005 電子輸送層
1006 共通の光透過性電極
1007 導電層
1008 絶縁層
1009 光散乱材料
1010 光透過性カバー
1011 ギャップ
Claims (23)
- 下部電極、上部電極、及び、前記下部電極と前記上部電極との間に介在し赤色、緑色及び青色のいずれかの光を放出する有機発光層を含む複数の画素部と、
前記上部電極の上方に設けられるガラス基板と、
前記複数の画素部と前記ガラス基板との間に介在し、前記複数の画素部の各々に対応して設けられる複数のレンズと前記レンズが突出して形成される土台である基底部とを有するレンズシートと、
前記上部電極と前記レンズシートとの間に介在し、前記複数の画素部を封止するための封止層と、
前記ガラス基板と前記レンズシートとの間に、その高さが少なくとも前記レンズの高さよりも高く設けられ、前記放出する色の異なる画素部間に対応するレンズ間を区画する隔壁と、を具備し、
前記レンズシートは、前記基底部の前記レンズが設けられた領域の外周に沿って形成され前記基底部の表面から前記レンズの突出方向とは逆方向に窪んだ窪み部を有し、
前記隔壁は、前記レンズシートの窪み部に挿入され、
前記隔壁の少なくとも前記窪み部に挿入された周囲面は黒色である、
表示パネル装置。 - 前記レンズシートの窪み部に挿入された前記隔壁の先端部は、前記隔壁によって区画された一の色に対応する画素部に含まれる有機発光層から放出される光であって、前記一の色に対応する画素部に隣接する他の色に対応する画素部に向かう光を吸収する、
請求項1記載の表示パネル装置。 - 前記窪み部に挿入された前記隔壁の底面は平面であり、
前記隔壁の少なくとも前記窪み部に挿入された周囲面が黒色とは、前記隔壁の底面が黒色であることを含む、
請求項2記載の表示パネル装置。 - 前記窪み部に挿入された前記隔壁の先端部は前記画素部の方に突出した形状であり、
前記隔壁の少なくとも前記窪み部に挿入された周囲面が黒色とは、前記先端部の突出した形状の側面が黒色であることを含む、
請求項2記載の表示パネル装置。 - 前記レンズシートの下面から前記複数の画素部に含まれる有機発光層までの距離と、前記レンズシートの下面から前記ガラス基板の下面までの距離との比は、1:1から1:8の範囲内である、
請求項1乃至請求項4のいずれか1項に記載の表示パネル装置。 - 前記隔壁は、各レンズ間であって、前記レンズの形成領域の端部から所定範囲内に形成されている、
請求項1乃至請求項5のいずれか1項に記載の表示パネル装置。 - 前記隔壁は、前記レンズの形成領域の端部から0μm以上であって54μm以下の範囲内に形成されている、
請求項6に記載の表示パネル装置。 - 前記隔壁の側面は黒色であり、
前記隔壁は、前記一の画素部に含まれる有機発光層から放出された光であって、前記ガラス基板で反射され前記一の色に対応する画素部に隣接する他の色に対応する画素部に向かう光を吸収する、
請求項1乃至請求項7のいずれか1項に記載の表示パネル装置。 - 前記隔壁は、さらに、前記表示パネル装置の外部から前記ガラス基板を介して前記一の画素部に入射する外光を吸収する、
請求項8に記載の表示パネル装置。 - 前記隔壁は、少なくとも前記基底部から延び前記ガラス基板に接触している
請求項1乃至請求項9のいずれか1項に記載の表示パネル装置。 - 前記窪み部は、前記レンズシートを貫通しており、
前記隔壁は、前記レンズシートの窪み部に挿入され、前記レンズシートを貫通している、
請求項1乃至請求項10のいずれか1項に記載の表示パネル装置。 - 前記基底部の厚さは5μmから20μmであって、前記有機発光層から前記レンズシートの底面までの距離が2μm以上の場合、前記隔壁を前記基底部の底面まで貫通させる、
請求項11記載の表示パネル装置。 - 前記隔壁の断面形状は、上辺が底辺よりも短く、側辺が傾斜した形状である、
請求項1乃至請求項12のいずれか1項に記載の表示パネル装置。 - 前記隔壁の断面形状は、上辺が底辺よりも長く、側辺が傾斜した形状である、
請求項1乃至請求項12のいずれか1項に記載の表示パネル装置。 - 前記複数の画素部は、所定の方向に沿って同一の色を放出する有機発光層を含み、
前記隔壁は、前記所定の方向に沿って、前記放出する色の異なる画素部間に対応するレンズ間を区画する
請求項1乃至請求項14記載の表示パネル装置。 - 前記レンズは、その上面視が長尺状であって、その長手方向に直交する断面が所定の曲率を有する楕円弧形状である、
請求項15記載の表示パネル装置。 - 前記複数の画素部は格子状に配置され、
前記隔壁は、前記複数のレンズの間に、前記格子状の縦方向及び横方向に設けられる、
請求項1乃至請求項14のいずれか1項に記載の表示パネル装置。 - 前記複数のレンズの上面にわたって形成され、前記複数のレンズにより形成された前記複数のレンズの凹凸を平坦化して前記レンズシートと前記ガラス基板とを接着する接着層が設けられ、
前記接着層の屈折率は、前記複数のレンズの屈折率よりも小さい、
請求項15乃至請求項17のいずれか1項に記載の表示パネル装置。 - 前記ガラス基板は、前記表示パネル装置の外面を形成する、
請求項1乃至請求項18記載の表示パネル装置。 - 前記有機発光層と前記下部電極との間には、前記有機発光層に正孔を注入する正孔注入層を含む、
請求項1乃至請求項19のいずれかに記載の表示パネル装置。 - 請求項1乃至請求項20のいずれか1項に記載の表示パネル装置を備えている表示装置。
- 下部電極、上部電極、及び、前記下部電極と前記上部電極との間に介在し赤色、緑色及び青色のいずれかの光を放出する有機発光層を含む複数の画素部を準備する第1工程と、
前記上部電極の上方に、前記複数の画素部を封止するための封止層を形成する第2工程と、
前記複数の画素部の各々に対応して設けられる複数のレンズと前記複数のレンズが突出して形成される土台である基底部とを有するレンズシートであって、前記基底部を補強するベース部材を前記基底部の前記レンズと反対側の面に有するレンズシートを準備する第3工程と、
ガラス基板に、各レンズの相互間を区画する複数の隔壁を形成する第4工程と、
前記基底部の前記レンズが設けられた領域の外周に沿って、前記基底部の表面から前記レンズの突出方向とは逆方向に窪んだ窪み部を形成する第5工程と、
前記ガラス基板に形成された隔壁を前記窪み部に挿入し、前記隔壁の高さが少なくとも前記レンズの高さよりも高くなるように前記隔壁を配置する第6工程と、
前記レンズシートと前記ガラス基板との間に接着剤を注入して前記レンズシートと前記ガラス基板とを接着する第7工程と、
前記レンズシートから前記ベース部材を剥離する第8工程と、
前記封止層の上面に接着剤を注入して、前記封止層と前記レンズシートとを接着する第9工程と、を含み、
前記隔壁の少なくとも前記窪み部に挿入された周囲面は黒色である、
表示パネル装置の製造方法。 - 前記第5工程は、前記窪み部を貫通させ、前記複数のレンズの間に前記隔壁を貫通させるための孔を形成する工程である、
請求項22に記載の表示パネル装置の製造方法。
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JP2019032811A (ja) * | 2017-08-08 | 2019-02-28 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 入力検知ユニットを備える表示装置 |
WO2021192504A1 (ja) * | 2020-03-26 | 2021-09-30 | 株式会社ジャパンディスプレイ | 表示装置 |
WO2022149554A1 (ja) * | 2021-01-08 | 2022-07-14 | ソニーグループ株式会社 | 表示装置及び電子機器 |
WO2022224080A1 (ja) * | 2021-04-23 | 2022-10-27 | 株式会社半導体エネルギー研究所 | 表示装置、表示モジュール、電子機器、及び、表示装置の作製方法 |
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CN102293052A (zh) | 2011-12-21 |
JPWO2011121662A1 (ja) | 2013-07-04 |
US8823254B2 (en) | 2014-09-02 |
KR20130008660A (ko) | 2013-01-23 |
US20120218173A1 (en) | 2012-08-30 |
JP5373054B2 (ja) | 2013-12-18 |
CN102293052B (zh) | 2015-04-15 |
KR101615397B1 (ko) | 2016-04-25 |
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