WO2015087461A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2015087461A1
WO2015087461A1 PCT/JP2014/002171 JP2014002171W WO2015087461A1 WO 2015087461 A1 WO2015087461 A1 WO 2015087461A1 JP 2014002171 W JP2014002171 W JP 2014002171W WO 2015087461 A1 WO2015087461 A1 WO 2015087461A1
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Prior art keywords
display
display surface
display device
regions
region
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PCT/JP2014/002171
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French (fr)
Japanese (ja)
Inventor
小笠原 真也
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パナソニック株式会社
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Publication of WO2015087461A1 publication Critical patent/WO2015087461A1/en

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods

Definitions

  • the present disclosure relates to a display device including a display panel such as a liquid crystal panel, an organic EL panel, or a plasma panel that displays an image.
  • a display panel such as a liquid crystal panel, an organic EL panel, or a plasma panel that displays an image.
  • the present disclosure has been made in view of such a situation, and an object of the present disclosure is to provide a display device that can reduce discomfort in how the viewer sees both ends of a display device having a curved display surface.
  • a display device of the present disclosure includes a display panel having a rectangular display surface size of 20 inches or more, and (i) a predetermined direction of the display surface in the display surface of the display panel.
  • a pair of first regions each having a width of 10% or more and 20% or less of the width in the predetermined direction of the display surface is a plane or a curved surface having a curvature radius of 10000 mm or more, and (Ii)
  • the second region between the pair of first regions is a curved surface having a curvature radius of 5000 mm or less, which is curved in a concave shape.
  • FIG. 1 is a perspective view showing an appearance of a display device according to the present embodiment.
  • FIG. 2 is an exploded perspective view in which a part of the display device according to the present embodiment is disassembled.
  • FIG. 3 is a cross-sectional view showing an example of a schematic structure of an organic EL element that becomes an RGB pixel portion in an organic EL panel included in the display device according to the present embodiment.
  • FIG. 4 is a circuit diagram illustrating an example of a circuit configuration for driving an organic EL element included in the display device in this embodiment.
  • FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the display device according to the present embodiment.
  • FIG. 6 is a front view and a top view of the display device according to the present embodiment. 7 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 8 is a cross-sectional view taken along the line AA of FIG. 6 in the display device according to the modification (1).
  • the conventional liquid crystal display device has a problem that the regions at both ends of the display surface in the curved direction appear distorted and a problem that the regions at both ends appear to be in focus. That is, the viewer feels uncomfortable in the appearance in the regions at both ends of the display surface.
  • An image taken by a general camera is an image on the premise that the image is displayed on a display device having a flat display surface. That is, an image shot with a general camera is shot in a state optimized for a flat display surface.
  • a display device with a curved display surface has a structure that is curved so as to be closer to the viewer side as the area on the display surface is shifted from the front of the viewer in a predetermined direction. That is, the display device has a structure in which the distance closer to the viewer increases as the area on the display screen is shifted in the predetermined direction from the front of the viewer.
  • the viewer when the video is displayed on a display device whose display surface is a curved surface, the viewer appears to be distorted as it approaches both ends of the display surface. In other words, the viewer does not look so distorted in front of the viewer on the display surface, but the image appears distorted in the regions at both ends of the viewer in the predetermined direction on the display surface.
  • the viewer When viewed on the entire display surface, the viewer focuses the eyes at the center of the display surface. On a flat display surface, the distance from the viewer is different between the center and both ends of the display surface. Therefore, when the display surface is a flat surface, the viewer tries to change the focal length of the eyes between the center of the display surface and both ends of the display surface. That is, when the viewer focuses the eyes on the center of the display surface, the eyes are not focused on the regions at both ends of the display surface.
  • the display surface is curved in a concave shape, the distance from the viewer to the center of the display surface is almost the same as the distance from the viewer to both ends of the panel. For this reason, the viewer can see the focused state at the center and both ends of the display surface without changing the focal length of the eyes. That is, even when the viewer focuses the eyes on the center of the display surface, the eyes are focused on both ends of the display surface.
  • the present disclosure has been made based on such knowledge, and as a result of intensive studies by the present inventors, in a display device having a curved display surface, a display that can reduce discomfort in the appearance of the display surface for the viewer I got an idea about the structure of the device.
  • FIG. 1 is a perspective view showing an appearance of a display device according to the present embodiment.
  • FIG. 2 is an exploded perspective view of a part of the display device according to the first embodiment.
  • FIG. 3 is a cross-sectional view showing an example of a schematic structure of an organic EL element serving as an RGB pixel portion in the organic EL panel included in the display device according to the present embodiment.
  • FIG. 4 is a circuit diagram showing an example of a circuit configuration for driving the organic EL element included in the display device according to the present embodiment.
  • FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the display device according to the present embodiment.
  • the display device 10 includes a display panel 1, a chassis 2, an escutcheon frame 3, a back cover 4, various electric circuit boards 5 to 9, and a stand 50.
  • the same functions are denoted by the same reference numerals and the description thereof is omitted.
  • the surface on which the image is displayed on the display panel 1 corresponds to the front side (display surface 100 side), and the surface on which the electric circuit boards 5, 6, etc. on the back side of the display panel 1 are installed is the back side (non-display surface). Side).
  • the left-right direction is defined as the direction when the display device is viewed from the front side
  • the up-down direction is defined as the up-down direction with the display device installed as shown in FIGS. To do.
  • the display panel 1 included in the display device 10 is an organic EL panel.
  • the display panel 1 includes a thin film transistor array device 101 in which a plurality of thin film transistors are arranged from the lower layer, an anode 102 as a lower electrode, a light emitting layer 103 made of an organic material, and a cathode 104 as a transparent upper electrode.
  • the light emitting part is controlled to emit light by the thin film transistor array device 101.
  • the light-emitting portion has a structure in which a light-emitting layer 103 is disposed between a pair of electrodes, that is, an anode 102 and a cathode 104, and a hole transport layer (see below) is provided between the anode 102 and the light-emitting layer 103. Are stacked, and an electron transport layer (see later) is stacked between the light emitting layer 103 and the transparent cathode 104.
  • the thin film transistor array device 101 has a plurality of pixels 105 arranged in a matrix.
  • Each pixel 105 is driven by a pixel circuit 106 provided therein.
  • the thin film transistor array device 101 includes a plurality of gate wirings 107 arranged in a row, a plurality of source wirings 108 as signal wirings arranged in a row so as to intersect the gate wirings 107, and a parallel to the source wiring 108. And a plurality of power supply wires 109 extending in the direction.
  • the gate wiring 107 connects the gate electrode 110g of the thin film transistor 110 operating as a switching element included in each pixel circuit 106 for each row.
  • the source wiring 108 connects the source electrodes 110 s of the thin film transistors 110 that operate as switching elements included in each of the pixel circuits 106 for each column.
  • the power supply wiring 109 connects the drain electrode 111d of the thin film transistor 111 operating as a driving element included in each pixel circuit 106 for each column.
  • the pixel circuit 106 includes a thin film transistor 110 that operates as a switching element, a thin film transistor 111 that operates as a driving element, and a capacitor 112 that stores data to be displayed in the corresponding pixel.
  • the thin film transistor 110 includes a gate electrode 110g connected to the gate wiring 107, a source electrode 110s connected to the source wiring 108, a drain electrode 110d connected to the gate electrode 111g of the capacitor 112 and the thin film transistor 111, and a semiconductor film (FIG. Not shown).
  • a voltage is applied to the connected gate wiring 107 and source wiring 108, the thin film transistor 110 stores the voltage value applied to the source wiring 108 in the capacitor 112 as display data.
  • the thin film transistor 111 includes a gate electrode 111g connected to the drain electrode 110d of the thin film transistor 110, a drain electrode 111d connected to the power supply wiring 109 and the capacitor 112, a source electrode 111s connected to the anode 102, and a semiconductor film (not shown). Z).
  • the thin film transistor 111 supplies a current corresponding to the voltage value held by the capacitor 112 from the power supply wiring 109 to the anode 102 through the source electrode 111s. That is, the display panel 1 of the display device 10 having the above configuration employs an active matrix system in which display control is performed for each pixel 105 located at the intersection of the gate wiring 107 and the source wiring 108.
  • the light-emitting portion that emits at least red, green, and blue light-emitting colors is a matrix of a plurality of sub-pixels having at least red (R), green (G), and blue (B) light-emitting layers.
  • a plurality of pixels are formed in an array.
  • the sub-pixels constituting each pixel are separated from each other by a bank.
  • the bank is provided by forming a ridge extending in parallel with the gate wiring 107 and a ridge extending in parallel with the source wiring 108 so as to intersect each other.
  • a subpixel having an RGB light emitting layer is formed in a portion surrounded by the protrusions, that is, an opening of the bank.
  • FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the organic EL panel of the display device.
  • a thin film transistor array device 122 constituting the pixel circuit 106 described above is formed on a base substrate 121 such as a glass substrate or a flexible resin substrate.
  • an anode 123 which is a lower electrode, is formed through a planarization insulating film (not shown).
  • a hole transport layer 124, an RGB light emitting layer 125 made of an organic material, an electron transport layer 126, and a cathode 127, which is a transparent upper electrode, are sequentially stacked.
  • An EL light emitting unit is configured.
  • the light emitting layer 125 of the light emitting unit is formed in a region partitioned by the bank 128 which is an insulating layer.
  • the bank 128 is for ensuring insulation between the anode 123 and the cathode 127 and partitioning the light emitting region into a predetermined shape, and is made of, for example, a photosensitive resin such as silicon oxide or polyimide.
  • the hole transport layer 124 and the electron transport layer 126 are shown, but the hole transport layer 124 and the electron transport layer 126 are laminated with a hole injection layer and an electron injection layer, respectively. Is formed.
  • the light emitting unit configured in this manner is covered with a sealing layer 129 such as silicon nitride, and further, a sealing substrate such as a transparent glass substrate or flexible resin substrate is provided on the sealing layer 129 via an adhesive layer 130. 131 is sealed by being bonded over the entire surface.
  • a sealing layer 129 such as silicon nitride
  • a sealing substrate such as a transparent glass substrate or flexible resin substrate
  • the shape, material, size and the like of the base substrate 121 are not particularly limited and can be appropriately selected according to the purpose.
  • a glass material such as alkali-free glass or soda glass, a silicon substrate, or a metal substrate may be used.
  • Polyethylene terephthalate, polycarbonate, polyethylene naphthalate, polyamide, polyimide, etc. are suitable as the polymer material, but other known polymers such as acetate resin, acrylic resin, polyethylene, polypropylene, polyvinyl chloride resin, etc.
  • a substrate material may be used.
  • an organic EL light emitting element is formed after forming a polymer substrate on a rigid base material such as glass by a coating method or pasting, and then a rigid material such as glass is formed.
  • a manufacturing method is used to remove a substrate.
  • the anode 123 is a metal material having good electrical conductivity such as aluminum, aluminum alloy or copper, or a metal oxide or metal sulfide having high electrical conductivity such as light-transmitting IZO, ITO, tin oxide, indium oxide or zinc oxide. Etc.
  • a thin film forming method such as a vacuum deposition method, a sputtering method, or an ion plating method is used.
  • the hole transport layer 124 is made of a polyvinyl carbazole material, a polysilane material, a polysiloxane derivative, a phthalocyanine compound such as copper phthalocyanine, an aromatic amine compound, or the like.
  • a film forming method various coating methods can be used, and the film is formed to a thickness of about 10 nm to 200 nm.
  • the hole injection layer stacked on the hole transport layer 124 is a layer that enhances hole injection from the anode 123, and is a metal oxide such as molybdenum oxide, vanadium oxide, or aluminum oxide, a metal nitride, or a metal. It is formed by sputtering using oxynitride.
  • the light emitting layer 125 is mainly composed of an organic material that emits fluorescence, phosphorescence, or the like, and a dopant is added as necessary to improve the characteristics.
  • a dopant is added as necessary to improve the characteristics.
  • a high molecular weight organic material suitable for the printing method a polyvinyl carbazole derivative, a polyparaphenylin derivative, a polyfluorene derivative, a poniphenylene vinylene derivative, or the like is used.
  • the dopant is used for shifting the emission wavelength and improving the light emission efficiency, and many dye-based and metal complex-based dopants have been developed.
  • a printing method is suitable, and the light emitting layer 125 having a thickness of about 20 nm to 200 nm is formed by using an ink jet method among various printing methods.
  • the electron transport layer 126 is made of a material such as a benzoxone derivative, a polyquinoline derivative, or an oxadiazole derivative.
  • a film forming method a vacuum deposition method, a coating method, or the like is used, and the film is usually formed to a thickness of about 10 nm to 200 nm.
  • the electron injection layer is made of a material such as barium, phthalocyanine, or lithium fluoride, and is formed by a vacuum deposition method, a coating method, or the like.
  • the material of the cathode 127 differs depending on the light extraction direction.
  • a light-transmitting conductive material such as ITO, IZO, tin oxide, or zinc oxide is used.
  • a material such as platinum, gold, silver, copper, tungsten, aluminum, or an aluminum alloy is used.
  • a film forming method a sputtering method, a vacuum evaporation method, or the like is used, and the film is formed to a thickness of about 50 nm to 500 nm.
  • the bank 128 is a structure necessary for filling a sufficient amount of the solution containing the material of the light emitting layer 125 in the region, and is formed in a predetermined shape by a photolithography method.
  • the shape of the sub-pixel of the organic EL light emitting unit can be controlled by the shape of the bank 128.
  • the sealing layer 129 is formed by forming a silicon nitride film, and a CVD (chemical vapor deposition) method is used as the film forming method.
  • CVD chemical vapor deposition
  • FIG. 6 is a front view and a top view of the display device according to the present embodiment.
  • 7 is a cross-sectional view taken along the line AA in FIG.
  • the display panel 1 has a rectangular display surface 100 and displays an image on the display surface 100.
  • the display panel 1 is a panel in which the size of the display surface 100 (that is, the length of the diagonal line of the display surface 100) is, for example, 55 inches.
  • the chassis 2 supports the back surface of the display panel 1 so that the display panel 1 is convex on the back surface side (that is, the side opposite to the display surface 100).
  • the chassis 2 has a display panel so that the pair of first regions R1 of the display surface 100 is a plane, and the second region R2 of the display surface 100 is a curved surface having a curvature radius of 1500 mm. 1 is supported. More specifically, in the chassis 2, the pair of first portions 21 facing the pair of first regions R ⁇ b> 1 of the display surface 100 is a flat plate, and the second portion 22 facing the second region R ⁇ b> 2 of the display panel 1. Is a curved plate having a curvature radius of 5000 mm or less.
  • the chassis 2 supports the back side of the pair of first regions R1 of the display panel 1 with the pair of first portions 21 and supports the back side of the second region R2 with the second portions 22. That is, the chassis 2 supports the display panel 1 on the back side of the pair of first region R1 and second region R2. In short, the chassis 2 supports the entire back side of the display panel 1. Note that the chassis 2 may not support the entire back side of the display panel 1, and may support at least a part of each of the pair of first region R1 and second region R2.
  • the pair of first regions R1 of the display panel 1 are regions located at both ends of the display surface 100 in a predetermined direction (X-axis direction in the present embodiment) among the regions of the display surface 100 of the display panel 1.
  • Each of the pair of first regions R1 is a region having a width of 20% of the width of the display surface 100 in a predetermined direction. That is, the pair of first regions R1 on the display surface 100 are both regions of the same size, and are regions located at both ends of the display surface 100 in a predetermined direction.
  • the pair of first regions R1 of the display surface 100 are separated from each of the pair of sides 11 and 12 facing in the predetermined direction of the display surface 100 by a distance of 20% of the width of the display surface 100 in the predetermined direction.
  • This is an area up to virtual lines 13 and 14. That is, one of the pair of first regions R1 is a region between the side 11 and the virtual line 13, and the other is a region between the side 12 and the virtual line 14.
  • the second region R2 of the display surface 100 is a region between the pair of first regions R1 among the regions of the display surface 100. That is, the second region R2 is a central region in the predetermined direction among the regions of the display surface 100, and is a region that is 60% of the width in the predetermined direction. In other words, it is an area between the virtual line 13 and the virtual line 14 on the display surface 100.
  • the display panel 1 is supported by the chassis 2 so that the pair of first regions R1 of the display surface 100 becomes a flat surface and the second region R2 of the display surface 100 is curved in a concave shape with a radius of curvature of 1500 mm.
  • the curved surface Note that the second region R2 of the display surface 100 being curved in a concave shape is the same as that the display panel 1 is curved so as to be convex toward the back side.
  • the regions are located at both ends of the display surface 100 in a predetermined direction, each having a width 20 in the predetermined direction of the display surface 100.
  • the pair of first regions R1 having a width of% is a flat surface
  • the second region R2 between the pair of first regions R1 is a curved surface having a curvature radius of 1500 mm that is curved in a concave shape.
  • the display device 10 is a region at a position shifted in a predetermined direction from the front surface on the display surface 100 when the viewer views the display surface 100 with the center of the display device 10 in front.
  • the regions of the positions at both ends in the predetermined direction (that is, the pair of first regions R1) are flat. For this reason, compared with the case where the whole display surface 100 is a curved surface, in a pair of 1st field R1, the distance which approaches a viewer can be reduced, and the distance from a viewer to a pair of 1st field R1 And the distance to the second region R2 can be made different.
  • the display device 10 since the display device 10 maintains a configuration in which the pair of first regions R1 at both ends in a predetermined direction are close to the viewer, the display device 10 can maintain a structure in which the viewer's field of view is covered with the display surface 100. That is, in the display device 10 according to the present embodiment, it is possible to reduce discomfort in the appearance of the pair of first regions R1 at both ends in a predetermined direction while maintaining a structure that covers the viewer's field of view with the display surface 100.
  • the chassis 2 is supported by both the pair of the first region R1 and the second region R2 of the display panel 1, but is not limited thereto.
  • a display device 10a may be employed in which a chassis 2a that supports only the second region R2 of the display panel 1 is employed. That is, the chassis 2a is a curved plate having a curvature radius of 5000 mm or less facing the second region R2 of the display panel 1, and supports the display panel 1 only in the second region R2 of the display panel 1.
  • the chassis 2a can support the display panel 1 so that the second region R2 of the display panel 1 is a curved surface having a curvature radius of 1500 mm. Further, since the display panel 1 is not supported in the pair of first regions R1 of the display panel 1, it can be kept flat.
  • the display surface 100 has been described as having a size of 55 inches.
  • the display device is not limited to 55 inches as long as it is 20 inches or more. That is, the effect of the present disclosure is remarkably exhibited in a display device having a display surface size of 20 inches or more.
  • the display panel 1 is a curved surface in which the pair of first regions R1 of the display surface 100 is a flat surface and the second region R2 of the display surface 100 is a curvature radius of 1500 mm.
  • the present invention is not limited to this.
  • the display panel is not limited to the pair of first regions R1 on the display surface being a flat surface, and the pair of first regions R1 on the display surface may be a curved surface having a concave shape of 10,000 mm or more.
  • the second region R2 of the display surface may be a curved surface having a length of 5000 mm or less.
  • the display device can obtain the same effects as those of the display device 10 according to the above-described embodiment even if the display panel is configured in the above numerical range.
  • the pair of first regions R1 is a region that is 20% of the width in the predetermined direction of the display surface 100
  • the second region R2 is in the predetermined direction of the display surface 100.
  • the pair of first regions may be regions that are 10% or more and 20% or less of the width in the predetermined direction of the display surface 100 from each of the pair of sides. That is, the second region R2 may be a central region in the predetermined direction among the regions of the display surface 100 and may be a region that is 60% to 80% of the width in the predetermined direction.
  • the display device can obtain the same effects as those of the display device 10 according to the above-described embodiment even if the display panel is configured in the above numerical range.
  • the organic EL panel is adopted as the display panel 1, but not limited to this, a liquid crystal panel or a plasma panel may be used.
  • the chassis 2 and 2a are plate-like support members that support the back surface of the display panel 1 with a surface. It may be a support member that supports the back surface with a plurality of lines or a plurality of points.
  • the present disclosure is useful as an organic EL display device, a liquid crystal display device, a plasma display device, and the like that can reduce discomfort in the way the viewer sees both ends of a display device having a curved display surface.

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  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract

This display device has a display panel (1) that has a rectangular display surface that is at least 20" in size. In said display surface (100), (i) a pair of first regions (R1) located on opposite ends of the display surface (100) in a prescribed direction, the width of each of said first regions being between 10% and 20% of the width of the display surface (100) in said direction, inclusive, are each either flat or curved with a radius of curvature of at least 10,000 mm and (ii) a second region (R2) between said first regions (R1) is concavely curved with a radius of curvature of at most 5,000 mm.

Description

表示装置Display device
 本開示は、映像を表示する液晶パネル、有機ELパネル、プラズマパネルなどの表示パネルを備えた表示装置に関する。 The present disclosure relates to a display device including a display panel such as a liquid crystal panel, an organic EL panel, or a plasma panel that displays an image.
 従来、表示面の曲率半径が固定化された液晶表示パネルを有する液晶表示装置が知られている(例えば、特許文献1参照)。 Conventionally, a liquid crystal display device having a liquid crystal display panel in which the radius of curvature of the display surface is fixed is known (for example, see Patent Document 1).
特開2009-086560号公報JP 2009-086560 A
 しかしながら、表示面の全てにおいて曲率半径が固定化されてしまう表示装置の場合、特に、大型サイズの画面においては、視聴者が、その両端の見え方に、違和感を覚えるという問題がある。 However, in the case of a display device in which the radius of curvature is fixed on the entire display surface, particularly on a large-sized screen, there is a problem that the viewer feels uncomfortable in the appearance of both ends.
 本開示はこのような現状に鑑みてなされたものであり、表示面が曲面である表示装置において、視聴者におけるその両端の見え方の違和感を低減できる表示装置を提供することを目的とする。 The present disclosure has been made in view of such a situation, and an object of the present disclosure is to provide a display device that can reduce discomfort in how the viewer sees both ends of a display device having a curved display surface.
 上記目的を実現するために本開示の表示装置は、矩形状の表示面のサイズが20インチ以上である表示パネルを備え、前記表示パネルの前記表示面において、(i)前記表示面の所定方向の両端に位置する領域であって、前記表示面の前記所定方向の幅の10%以上20%以下の幅をそれぞれが有する一対の第一領域が平面または曲率半径10000mm以上の曲面であり、かつ、(ii)前記一対の第一領域の間の第二領域が凹状に湾曲している曲率半径5000mm以下の曲面である。 In order to achieve the above object, a display device of the present disclosure includes a display panel having a rectangular display surface size of 20 inches or more, and (i) a predetermined direction of the display surface in the display surface of the display panel. A pair of first regions each having a width of 10% or more and 20% or less of the width in the predetermined direction of the display surface is a plane or a curved surface having a curvature radius of 10000 mm or more, and (Ii) The second region between the pair of first regions is a curved surface having a curvature radius of 5000 mm or less, which is curved in a concave shape.
 本開示によれば、表示面が曲面を有する表示装置において、視聴者における表示面の見え方の違和感を低減できる。 According to the present disclosure, in a display device having a curved display surface, it is possible to reduce discomfort in how the viewer sees the display surface.
図1は、本実施の形態における表示装置の外観を示す斜視図である。FIG. 1 is a perspective view showing an appearance of a display device according to the present embodiment. 図2は、本実施の形態における表示装置の一部を分解した分解斜視図である。FIG. 2 is an exploded perspective view in which a part of the display device according to the present embodiment is disassembled. 図3は、本実施の形態における表示装置が備える有機ELパネルにおけるRGBの画素部分となる有機EL素子の概略構造の一例を示す断面図である。FIG. 3 is a cross-sectional view showing an example of a schematic structure of an organic EL element that becomes an RGB pixel portion in an organic EL panel included in the display device according to the present embodiment. 図4は、本実施の形態における表示装置が備える有機EL素子を駆動するための回路構成の一例を示す回路図である。FIG. 4 is a circuit diagram illustrating an example of a circuit configuration for driving an organic EL element included in the display device in this embodiment. 図5は、本実施の形態における表示装置において、RGBのサブピクセルの部分の断面構造を示す断面図である。FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the display device according to the present embodiment. 図6は、本実施の形態にかかる表示装置の正面図および上面図である。FIG. 6 is a front view and a top view of the display device according to the present embodiment. 図7は、図6のA-A断面図である。7 is a cross-sectional view taken along the line AA in FIG. 図8は、変形例(1)に係る表示装置における図6のA-A断面図である。FIG. 8 is a cross-sectional view taken along the line AA of FIG. 6 in the display device according to the modification (1).
 (本発明の基礎となった知見)
 本発明者は、「背景技術」の欄において記載した液晶表示装置に関し、以下の問題が生じることを見出した。
(Knowledge that became the basis of the present invention)
The inventor has found that the following problems occur with respect to the liquid crystal display device described in the “Background Art” column.
 特許文献1のような液晶表示装置では、表示面を凹状に湾曲させることにより、視聴者の視界を表示装置の表示面で覆うような構造となるため、視聴者が表示面に表示される映像に対して没入感を得やすい。 In the liquid crystal display device as in Patent Document 1, since the display surface is curved in a concave shape so that the viewer's field of view is covered with the display surface of the display device, an image displayed on the display surface of the viewer is displayed. It is easy to get an immersive feeling.
 しかしながら、上記従来の液晶表示装置では、表示面の湾曲している方向の両端の領域がひずんで見えるという問題と、当該両端の領域においても焦点が合っているように見えるという問題とがある。つまり、視聴者は、表示面の両端の領域における見え方に、違和感を覚えることになる。 However, the conventional liquid crystal display device has a problem that the regions at both ends of the display surface in the curved direction appear distorted and a problem that the regions at both ends appear to be in focus. That is, the viewer feels uncomfortable in the appearance in the regions at both ends of the display surface.
 上記の2つの問題のうちの前者について以下に説明する。一般的なカメラにより撮影されている画像は、表示面が平面である表示装置に表示させる前提での画像である。つまり、一般的なカメラで撮影された映像は、平面の表示面に最適化された状態で撮影されている。ところで、表示面が曲面の表示装置では、表示面における視聴者の正面から所定方向にずれた領域であるほど、視聴者側に近づくように湾曲している構造である。つまり、当該表示装置では、表示面における視聴者の正面から所定方向にずれた領域であるほど、視聴者側に近づく距離が増加している構造である。このため、当該映像を表示面が曲面である表示装置に表示させた場合、視聴者からは、表示面の両端に近づくほど大きく歪んで見えることになる。つまり、表示面における視聴者の正面では、視聴者からはそれほど歪んで見えないが、表示面における視聴者の所定方向の両端の領域では映像が歪んで見えることになる。 The former of the above two problems will be explained below. An image taken by a general camera is an image on the premise that the image is displayed on a display device having a flat display surface. That is, an image shot with a general camera is shot in a state optimized for a flat display surface. By the way, a display device with a curved display surface has a structure that is curved so as to be closer to the viewer side as the area on the display surface is shifted from the front of the viewer in a predetermined direction. That is, the display device has a structure in which the distance closer to the viewer increases as the area on the display screen is shifted in the predetermined direction from the front of the viewer. For this reason, when the video is displayed on a display device whose display surface is a curved surface, the viewer appears to be distorted as it approaches both ends of the display surface. In other words, the viewer does not look so distorted in front of the viewer on the display surface, but the image appears distorted in the regions at both ends of the viewer in the predetermined direction on the display surface.
 また、後者の問題について以下に説明する。表示面全体で見るときに、視聴者は、表示面の中央で目の焦点を合わせる。平面の表示面では、表示面の中央と両端とでは、視聴者からの距離が異なる。このため、視聴者は、表示面が平面の場合には、表示面の中央と表示面の両端とでは目の焦点距離を変えてみることになる。つまり、視聴者は、表示面の中央に目の焦点を合わせている場合には、表示面の両端の領域には目の焦点が合っていない状態となる。しかしながら、表示面が凹状に湾曲している場合には、視聴者から表示面の中央までの距離と、視聴者からパネルの両端までの距離とがほとんど変わらない。このため、視聴者は、表示面の中央と両端とでは、目の焦点距離を変えなくても焦点が合った状態で見えることになる。つまり、視聴者は、表示面の中央に目の焦点を合わせている場合においても、表示面の両端に目の焦点が合ってしまうことになる。 The latter problem will be described below. When viewed on the entire display surface, the viewer focuses the eyes at the center of the display surface. On a flat display surface, the distance from the viewer is different between the center and both ends of the display surface. Therefore, when the display surface is a flat surface, the viewer tries to change the focal length of the eyes between the center of the display surface and both ends of the display surface. That is, when the viewer focuses the eyes on the center of the display surface, the eyes are not focused on the regions at both ends of the display surface. However, when the display surface is curved in a concave shape, the distance from the viewer to the center of the display surface is almost the same as the distance from the viewer to both ends of the panel. For this reason, the viewer can see the focused state at the center and both ends of the display surface without changing the focal length of the eyes. That is, even when the viewer focuses the eyes on the center of the display surface, the eyes are focused on both ends of the display surface.
 以上のことから、視聴者は、従来の液晶表示装置において、その両端の領域で表示された映像の見え方に違和感を覚える。 From the above, the viewer feels uncomfortable in the appearance of the images displayed in the regions at both ends of the conventional liquid crystal display device.
 本開示は、このような知見に基づいてなされたものであり、本発明者が鋭意検討した結果、表示面が曲面を有する表示装置において、視聴者における表示面の見え方の違和感を低減できる表示装置の構造についての着想を得た。 The present disclosure has been made based on such knowledge, and as a result of intensive studies by the present inventors, in a display device having a curved display surface, a display that can reduce discomfort in the appearance of the display surface for the viewer I got an idea about the structure of the device.
 以下、適宜図面を参照しながら、実施の形態を詳細に説明する。但し、必要以上に詳細な説明は省略する場合がある。例えば、既によく知られた事項の詳細説明や実質的に同一の構成に対する重複説明を省略する場合がある。これは、以下の説明が不必要に冗長になるのを避け、当業者の理解を容易にするためである。 Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.
 なお、発明者は、当業者が本開示を十分に理解するために添付図面及び以下の説明を提供するのであって、これらによって請求の範囲に記載の主題を限定することを意図するものではない。 In addition, the inventor provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the subject matter described in the claims. .
 以下、本開示の一実施の形態による表示装置について図を用いて説明するが、本開示の実施の態様はこれに限定されるものではない。 Hereinafter, a display device according to an embodiment of the present disclosure will be described with reference to the drawings. However, the embodiment of the present disclosure is not limited thereto.
 (実施の形態)
 図1は、本実施の形態による表示装置の外観を示す斜視図である。図2は、本実施の形態1による表示装置の一部を分解した分解斜視図である。図3は、本実施の形態による表示装置が備える有機ELパネルにおけるRGBの画素部分となる有機EL素子の概略構造の一例を示す断面図である。図4は、本実施の形態による表示装置が備える有機EL素子を駆動するための回路構成の一例を示す回路図である。図5は、本実施の形態による表示装置において、RGBのサブピクセルの部分の断面構造を示す断面図である。
(Embodiment)
FIG. 1 is a perspective view showing an appearance of a display device according to the present embodiment. FIG. 2 is an exploded perspective view of a part of the display device according to the first embodiment. FIG. 3 is a cross-sectional view showing an example of a schematic structure of an organic EL element serving as an RGB pixel portion in the organic EL panel included in the display device according to the present embodiment. FIG. 4 is a circuit diagram showing an example of a circuit configuration for driving the organic EL element included in the display device according to the present embodiment. FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the display device according to the present embodiment.
 図1および図2に示すように、表示装置10は、表示パネル1、シャーシ2、エスカッションフレーム3、バックカバー4、各種電気回路基板5~9、およびスタンド50を備える。以下、同一機能のものには同一符号を記して説明を省略する。 1 and 2, the display device 10 includes a display panel 1, a chassis 2, an escutcheon frame 3, a back cover 4, various electric circuit boards 5 to 9, and a stand 50. Hereinafter, the same functions are denoted by the same reference numerals and the description thereof is omitted.
 表示装置10は、表示パネル1に画像を表示する面が前面側(表示面100側)にあたり、表示パネル1の裏側の電気回路基板5、6等が設置される面が背面側(非表示面側)となる。以下、説明の都合上、左右方向については前面側から表示装置を見た際の向きで定義し、上下方向については図1および図2に示すように表示装置を設置した状態での上下として定義する。 In the display device 10, the surface on which the image is displayed on the display panel 1 corresponds to the front side (display surface 100 side), and the surface on which the electric circuit boards 5, 6, etc. on the back side of the display panel 1 are installed is the back side (non-display surface). Side). Hereinafter, for convenience of explanation, the left-right direction is defined as the direction when the display device is viewed from the front side, and the up-down direction is defined as the up-down direction with the display device installed as shown in FIGS. To do.
 (有機ELパネルの構造)
 図3および図4に示すように、表示装置10が備える表示パネル1は、有機ELパネルである。表示パネル1は、下層より、複数個の薄膜トランジスタを配置した薄膜トランジスタアレイ装置101と、下部電極である陽極102、有機材料からなる発光層103、および、透明な上部電極である陰極104からなる発光部との積層構造により構成され、前記発光部は薄膜トランジスタアレイ装置101により発光制御される。また、前記発光部は、一対の電極である陽極102と陰極104との間に発光層103を配置した構成であり、陽極102と発光層103との間には正孔輸送層(後述参照)が積層形成され、発光層103と透明な陰極104との間には電子輸送層(後述参照)が積層形成されている。薄膜トランジスタアレイ装置101には、複数の画素105がマトリクス状に配置されている。
(Structure of organic EL panel)
As shown in FIGS. 3 and 4, the display panel 1 included in the display device 10 is an organic EL panel. The display panel 1 includes a thin film transistor array device 101 in which a plurality of thin film transistors are arranged from the lower layer, an anode 102 as a lower electrode, a light emitting layer 103 made of an organic material, and a cathode 104 as a transparent upper electrode. The light emitting part is controlled to emit light by the thin film transistor array device 101. The light-emitting portion has a structure in which a light-emitting layer 103 is disposed between a pair of electrodes, that is, an anode 102 and a cathode 104, and a hole transport layer (see below) is provided between the anode 102 and the light-emitting layer 103. Are stacked, and an electron transport layer (see later) is stacked between the light emitting layer 103 and the transparent cathode 104. The thin film transistor array device 101 has a plurality of pixels 105 arranged in a matrix.
 各画素105は、それぞれに設けられた画素回路106によって駆動される。また、薄膜トランジスタアレイ装置101は、行状に配置される複数のゲート配線107と、ゲート配線107と交差するように列状に配置される複数の信号配線としてのソース配線108と、ソース配線108に平行に延びる複数の電源配線109とを備える。 Each pixel 105 is driven by a pixel circuit 106 provided therein. In addition, the thin film transistor array device 101 includes a plurality of gate wirings 107 arranged in a row, a plurality of source wirings 108 as signal wirings arranged in a row so as to intersect the gate wirings 107, and a parallel to the source wiring 108. And a plurality of power supply wires 109 extending in the direction.
 図4に示すように、ゲート配線107は、画素回路106のそれぞれに含まれるスイッチング素子として動作する薄膜トランジスタ110のゲート電極110gを行毎に接続する。ソース配線108は、画素回路106のそれぞれに含まれるスイッチング素子として動作する薄膜トランジスタ110のソース電極110sを列毎に接続する。電源配線109は、画素回路106のそれぞれに含まれる駆動素子として動作する薄膜トランジスタ111のドレイン電極111dを列毎に接続する。 As shown in FIG. 4, the gate wiring 107 connects the gate electrode 110g of the thin film transistor 110 operating as a switching element included in each pixel circuit 106 for each row. The source wiring 108 connects the source electrodes 110 s of the thin film transistors 110 that operate as switching elements included in each of the pixel circuits 106 for each column. The power supply wiring 109 connects the drain electrode 111d of the thin film transistor 111 operating as a driving element included in each pixel circuit 106 for each column.
 図4に示すように、画素回路106は、スイッチング素子として動作する薄膜トランジスタ110と、駆動素子として動作する薄膜トランジスタ111と、対応する画素に表示するデータを記憶するキャパシタ112とで構成される。 As shown in FIG. 4, the pixel circuit 106 includes a thin film transistor 110 that operates as a switching element, a thin film transistor 111 that operates as a driving element, and a capacitor 112 that stores data to be displayed in the corresponding pixel.
 薄膜トランジスタ110は、ゲート配線107に接続されるゲート電極110gと、ソース配線108に接続されるソース電極110sと、キャパシタ112および薄膜トランジスタ111のゲート電極111gに接続されるドレイン電極110dと、半導体膜(図示せず)とで構成される。この薄膜トランジスタ110は、接続されたゲート配線107およびソース配線108に電圧が印加されると、当該ソース配線108に印加された電圧値を表示データとしてキャパシタ112に保存する。 The thin film transistor 110 includes a gate electrode 110g connected to the gate wiring 107, a source electrode 110s connected to the source wiring 108, a drain electrode 110d connected to the gate electrode 111g of the capacitor 112 and the thin film transistor 111, and a semiconductor film (FIG. Not shown). When a voltage is applied to the connected gate wiring 107 and source wiring 108, the thin film transistor 110 stores the voltage value applied to the source wiring 108 in the capacitor 112 as display data.
 薄膜トランジスタ111は、薄膜トランジスタ110のドレイン電極110dに接続されるゲート電極111gと、電源配線109およびキャパシタ112に接続されるドレイン電極111dと、陽極102に接続されるソース電極111sと、半導体膜(図示せず)とで構成される。この薄膜トランジスタ111は、キャパシタ112が保持している電圧値に対応する電流を電源配線109からソース電極111sを通じて陽極102に供給する。すなわち、上記構成の表示装置10の表示パネル1は、ゲート配線107とソース配線108との交点に位置する画素105毎に表示制御を行うアクティブマトリックス方式を採用している。 The thin film transistor 111 includes a gate electrode 111g connected to the drain electrode 110d of the thin film transistor 110, a drain electrode 111d connected to the power supply wiring 109 and the capacitor 112, a source electrode 111s connected to the anode 102, and a semiconductor film (not shown). Z). The thin film transistor 111 supplies a current corresponding to the voltage value held by the capacitor 112 from the power supply wiring 109 to the anode 102 through the source electrode 111s. That is, the display panel 1 of the display device 10 having the above configuration employs an active matrix system in which display control is performed for each pixel 105 located at the intersection of the gate wiring 107 and the source wiring 108.
 また、表示装置10において、少なくとも赤色、緑色および青色の発光色で発光する発光部は、少なくとも赤色(R)、緑色(G)、および青色(B)の発光層を有するサブピクセルが複数個マトリクス状に配列されて複数個の画素が形成されている。各画素を構成するサブピクセルは、バンクによって互いに分離されている。このバンクは、ゲート配線107に平行に延びる突条と、ソース配線108に平行に延びる突条とが互いに交差するように形成することにより設けられる。そして、この突条で囲まれる部分、すなわちバンクの開口部にRGBの発光層を有するサブピクセルが形成されている。 In the display device 10, the light-emitting portion that emits at least red, green, and blue light-emitting colors is a matrix of a plurality of sub-pixels having at least red (R), green (G), and blue (B) light-emitting layers. A plurality of pixels are formed in an array. The sub-pixels constituting each pixel are separated from each other by a bank. The bank is provided by forming a ridge extending in parallel with the gate wiring 107 and a ridge extending in parallel with the source wiring 108 so as to intersect each other. A subpixel having an RGB light emitting layer is formed in a portion surrounded by the protrusions, that is, an opening of the bank.
 図5は、表示装置の有機ELパネルにおいて、RGBのサブピクセルの部分の断面構造を示す断面図である。図5に示すように、表示パネル1は、ガラス基板、フレキシブル樹脂基板などのベース基板121上に、上述した画素回路106を構成する薄膜トランジスタアレイ装置122を形成している。また、薄膜トランジスタアレイ装置122には、平坦化絶縁膜(図示せず)を介して下部電極である陽極123が形成されている。そして、陽極123上には、正孔輸送層124、有機材料からなるRGBに発光する発光層125、電子輸送層126、透明な上部電極である陰極127が順に積層形成され、これによりRGBの有機EL発光部が構成されている。 FIG. 5 is a cross-sectional view showing a cross-sectional structure of the RGB sub-pixel portion in the organic EL panel of the display device. As shown in FIG. 5, in the display panel 1, a thin film transistor array device 122 constituting the pixel circuit 106 described above is formed on a base substrate 121 such as a glass substrate or a flexible resin substrate. In the thin film transistor array device 122, an anode 123, which is a lower electrode, is formed through a planarization insulating film (not shown). On the anode 123, a hole transport layer 124, an RGB light emitting layer 125 made of an organic material, an electron transport layer 126, and a cathode 127, which is a transparent upper electrode, are sequentially stacked. An EL light emitting unit is configured.
 また、前記発光部の発光層125は、絶縁層であるバンク128により区画された領域に形成されている。バンク128は、陽極123と陰極127との絶縁性を確保すると共に、発光領域を所定の形状に区画するためのものであり、例えば酸化シリコンまたはポリイミドなどの感光性樹脂により構成されている。 Further, the light emitting layer 125 of the light emitting unit is formed in a region partitioned by the bank 128 which is an insulating layer. The bank 128 is for ensuring insulation between the anode 123 and the cathode 127 and partitioning the light emitting region into a predetermined shape, and is made of, for example, a photosensitive resin such as silicon oxide or polyimide.
 なお、上記実施の形態においては、正孔輸送層124および電子輸送層126のみを示しているが、正孔輸送層124、電子輸送層126それぞれには、正孔注入層、電子注入層が積層形成されている。 In the above embodiment, only the hole transport layer 124 and the electron transport layer 126 are shown, but the hole transport layer 124 and the electron transport layer 126 are laminated with a hole injection layer and an electron injection layer, respectively. Is formed.
 このように構成された発光部は、窒化ケイ素などの封止層129により被覆され、さらにこの封止層129上に接着層130を介して透明なガラス基板、フレキシブル樹脂基板などの封止用基板131が全面にわたって張り合わされることにより封止されている。 The light emitting unit configured in this manner is covered with a sealing layer 129 such as silicon nitride, and further, a sealing substrate such as a transparent glass substrate or flexible resin substrate is provided on the sealing layer 129 via an adhesive layer 130. 131 is sealed by being bonded over the entire surface.
 ここで、ベース基板121としては、その形状、材質、大きさ等については、特に制限はなく、目的に応じて適宜選択することができる。例えば、無アルカリガラス、ソーダガラスなどのガラス材料やシリコン基板でも金属基板でもよい。また、軽量化やフレキシブル化を目的として高分子系材料を用いてもよい。高分子系材料としては、ポリエチレンテレフタレート、ポリカーボネート、ポリエチレンナフタレート、ポリアミド、ポリイミドなどが適しているが、その他のアセテート系樹脂やアクリル系樹脂やポリエチレンやポリプロピレンやポリ塩化ビニル樹脂などの既知の高分子基板材料を用いてもよい。高分子系材料を基板として用いるときには、ガラスなどの剛性のある基材の上に高分子基板を塗布法や貼り付けなどで形成した後、有機EL発光素子を形成し、その後ガラスなどの剛性のある基材を除去する製造方法が用いられる。 Here, the shape, material, size and the like of the base substrate 121 are not particularly limited and can be appropriately selected according to the purpose. For example, a glass material such as alkali-free glass or soda glass, a silicon substrate, or a metal substrate may be used. Moreover, you may use a polymeric material for the purpose of weight reduction or flexibility. Polyethylene terephthalate, polycarbonate, polyethylene naphthalate, polyamide, polyimide, etc. are suitable as the polymer material, but other known polymers such as acetate resin, acrylic resin, polyethylene, polypropylene, polyvinyl chloride resin, etc. A substrate material may be used. When a polymer material is used as a substrate, an organic EL light emitting element is formed after forming a polymer substrate on a rigid base material such as glass by a coating method or pasting, and then a rigid material such as glass is formed. A manufacturing method is used to remove a substrate.
 陽極123は、アルミニウムやアルミニウム合金や銅などの導電性の良い金属材料や、光透過性のIZO、ITO、酸化スズ、酸化インジウム、酸化亜鉛などの電気伝導度の高い金属酸化物や金属硫化物などにより構成される。成膜方法としては、真空蒸着法やスパッタリング法やイオンプレーティング法などの薄膜形成法が用いられる。 The anode 123 is a metal material having good electrical conductivity such as aluminum, aluminum alloy or copper, or a metal oxide or metal sulfide having high electrical conductivity such as light-transmitting IZO, ITO, tin oxide, indium oxide or zinc oxide. Etc. As a film forming method, a thin film forming method such as a vacuum deposition method, a sputtering method, or an ion plating method is used.
 正孔輸送層124は、ポリビニルカルバゾール系材料、ポリシラン系材料、ポリシロキサン誘導体、銅フタロシアニンなどのフタロシアニン系化合物や芳香族アミン系化合物などが用いられる。成膜方法としては、各種の塗布工法を用いることが可能であり、10nm~200nm程度の厚みに形成される。また、正孔輸送層124に積層される正孔注入層は、陽極123からの正孔注入を高める層であり、酸化モリブデンや酸化バナジウムや酸化アルミニウムなどの金属酸化物、金属窒化物、または金属酸化窒化物を用いてスパッタ法により形成される。 The hole transport layer 124 is made of a polyvinyl carbazole material, a polysilane material, a polysiloxane derivative, a phthalocyanine compound such as copper phthalocyanine, an aromatic amine compound, or the like. As a film forming method, various coating methods can be used, and the film is formed to a thickness of about 10 nm to 200 nm. The hole injection layer stacked on the hole transport layer 124 is a layer that enhances hole injection from the anode 123, and is a metal oxide such as molybdenum oxide, vanadium oxide, or aluminum oxide, a metal nitride, or a metal. It is formed by sputtering using oxynitride.
 発光層125は、蛍光や燐光などを発光する有機系材料を主成分とし、必要に応じてドーパントを添加して特性を改善する。印刷法に適した高分子系有機材料としては、ポリビニルカルバゾール誘導体、ポリパラフェニリン誘導体、ポリフルオレン誘導体、ポニフェニレンビニレン誘導体などが用いられる。ドーパントは、発光波長のシフトや発光効率の改善のために用いられるものであり、色素系および金属錯体系のドーパントが数多く開発されている。また、大型基板に発光層125を形成する場合には印刷法が適しており、各種の印刷法の中でもインクジェット法が用いられることにより20nm~200nm程度の厚みの発光層125が形成される。 The light emitting layer 125 is mainly composed of an organic material that emits fluorescence, phosphorescence, or the like, and a dopant is added as necessary to improve the characteristics. As the high molecular weight organic material suitable for the printing method, a polyvinyl carbazole derivative, a polyparaphenylin derivative, a polyfluorene derivative, a poniphenylene vinylene derivative, or the like is used. The dopant is used for shifting the emission wavelength and improving the light emission efficiency, and many dye-based and metal complex-based dopants have been developed. In addition, when the light emitting layer 125 is formed over a large substrate, a printing method is suitable, and the light emitting layer 125 having a thickness of about 20 nm to 200 nm is formed by using an ink jet method among various printing methods.
 電子輸送層126は、ベンゾキソン誘導体、ポリキノリン誘導体、オキサジアゾール誘導体などの材料が用いられる。成膜方法としては、真空蒸着法、塗布法などが用いられ、通常10nm~200nm程度の厚みに形成される。また、電子注入層は、バリウム、フタロシアニン、フッ化リチウムなどの材料が用いられ、真空蒸着法、塗布法などにより形成される。 The electron transport layer 126 is made of a material such as a benzoxone derivative, a polyquinoline derivative, or an oxadiazole derivative. As a film forming method, a vacuum deposition method, a coating method, or the like is used, and the film is usually formed to a thickness of about 10 nm to 200 nm. The electron injection layer is made of a material such as barium, phthalocyanine, or lithium fluoride, and is formed by a vacuum deposition method, a coating method, or the like.
 陰極127は、光の取り出し方向により材料が異なり、陰極127側から光を取り出す場合は、ITO、IZO、酸化スズ、酸化亜鉛などの光透光性の導電材料を用いる。陽極123側から光を取り出す場合は、白金、金、銀、銅、タングステン、アルミニウム、アルミニウム合金などの材料を用いる。成膜方法としては、スパッタ法、真空蒸着法などが用いられ、50nm~500nm程度の厚みに形成される。 The material of the cathode 127 differs depending on the light extraction direction. When light is extracted from the cathode 127 side, a light-transmitting conductive material such as ITO, IZO, tin oxide, or zinc oxide is used. When light is extracted from the anode 123 side, a material such as platinum, gold, silver, copper, tungsten, aluminum, or an aluminum alloy is used. As a film forming method, a sputtering method, a vacuum evaporation method, or the like is used, and the film is formed to a thickness of about 50 nm to 500 nm.
 バンク128は、領域内に発光層125の材料を含む溶液を十分な量で充填するために必要な構造物で、フォトリソ法によって所定の形状に形成される。バンク128の形状により、有機EL発光部のサブピクセルの形状を制御することができる。 The bank 128 is a structure necessary for filling a sufficient amount of the solution containing the material of the light emitting layer 125 in the region, and is formed in a predetermined shape by a photolithography method. The shape of the sub-pixel of the organic EL light emitting unit can be controlled by the shape of the bank 128.
 封止層129は、窒化ケイ素膜を成膜することにより形成され、成膜法としてはCVD(化学気相成長)法が用いられる。 The sealing layer 129 is formed by forming a silicon nitride film, and a CVD (chemical vapor deposition) method is used as the film forming method.
 図6は、本実施の形態にかかる表示装置の正面図および上面図である。図7は、図6のA-A断面図である。 FIG. 6 is a front view and a top view of the display device according to the present embodiment. 7 is a cross-sectional view taken along the line AA in FIG.
 図2および図6に示すように、表示パネル1は、矩形状の表示面100を有しており、当該表示面100に画像を表示する。表示パネル1は、表示面100のサイズ(つまり、表示面100の対角線の長さ)が例えば55インチのパネルである。 2 and 6, the display panel 1 has a rectangular display surface 100 and displays an image on the display surface 100. The display panel 1 is a panel in which the size of the display surface 100 (that is, the length of the diagonal line of the display surface 100) is, for example, 55 inches.
 シャーシ2は、表示パネル1が背面側(つまり、表示面100の反対側)に凸になるように、表示パネル1の背面を支持する。シャーシ2は、本実施の形態では、表示面100の一対の第一領域R1が平面になるように、かつ、表示面100の第二領域R2が曲率半径1500mmの曲面になるように、表示パネル1を支持する。より具体的には、シャーシ2は、表示面100の一対の第一領域R1に対向する一対の第一部分21が平板であり、かつ、表示パネル1の第二領域R2に対向する第二部分22が曲率半径5000mm以下の曲板である。シャーシ2は、表示パネル1の一対の第一領域R1の背面側を一対の第一部分21で支持し、かつ、第二領域R2の背面側を第二部分22で支持する。つまり、シャーシ2は、表示パネル1を一対の第一領域R1および第二領域R2の背面側で支持する。要するに、シャーシ2は、表示パネル1の背面側の全体を支持する。なお、シャーシ2は、表示パネル1の背面側の全体を支持していなくてもよく、一対の第一領域R1および第二領域R2のそれぞれの領域の少なくとも一部で支持していてもよい。 The chassis 2 supports the back surface of the display panel 1 so that the display panel 1 is convex on the back surface side (that is, the side opposite to the display surface 100). In the present embodiment, the chassis 2 has a display panel so that the pair of first regions R1 of the display surface 100 is a plane, and the second region R2 of the display surface 100 is a curved surface having a curvature radius of 1500 mm. 1 is supported. More specifically, in the chassis 2, the pair of first portions 21 facing the pair of first regions R <b> 1 of the display surface 100 is a flat plate, and the second portion 22 facing the second region R <b> 2 of the display panel 1. Is a curved plate having a curvature radius of 5000 mm or less. The chassis 2 supports the back side of the pair of first regions R1 of the display panel 1 with the pair of first portions 21 and supports the back side of the second region R2 with the second portions 22. That is, the chassis 2 supports the display panel 1 on the back side of the pair of first region R1 and second region R2. In short, the chassis 2 supports the entire back side of the display panel 1. Note that the chassis 2 may not support the entire back side of the display panel 1, and may support at least a part of each of the pair of first region R1 and second region R2.
 表示パネル1の一対の第一領域R1は、表示パネル1の表示面100の領域のうちで、表示面100の所定方向(本実施の形態ではX軸方向)の両端に位置する領域であって、一対の第一領域R1のそれぞれが表示面100の所定方向の幅の20%の幅を有する領域である。つまり、表示面100の一対の第一領域R1は、両方ともが同じサイズの領域であり、表示面100の所定方向の両端に位置する領域である。言い換えると、表示面100の一対の第一領域R1は、表示面100の所定方向で対向する一対の辺11、12のそれぞれから、表示面100の所定方向の幅の20%の距離だけ離れた仮想線13、14までの領域である。つまり、一対の第一領域R1の一つは、辺11から仮想線13までの間の領域であり、もう一つは、辺12から仮想線14までの間の領域である。 The pair of first regions R1 of the display panel 1 are regions located at both ends of the display surface 100 in a predetermined direction (X-axis direction in the present embodiment) among the regions of the display surface 100 of the display panel 1. Each of the pair of first regions R1 is a region having a width of 20% of the width of the display surface 100 in a predetermined direction. That is, the pair of first regions R1 on the display surface 100 are both regions of the same size, and are regions located at both ends of the display surface 100 in a predetermined direction. In other words, the pair of first regions R1 of the display surface 100 are separated from each of the pair of sides 11 and 12 facing in the predetermined direction of the display surface 100 by a distance of 20% of the width of the display surface 100 in the predetermined direction. This is an area up to virtual lines 13 and 14. That is, one of the pair of first regions R1 is a region between the side 11 and the virtual line 13, and the other is a region between the side 12 and the virtual line 14.
 表示面100の第二領域R2は、表示面100の領域のうちで一対の第一領域R1の間の領域である。つまり、第二領域R2は、表示面100の領域のうちで所定方向の中央の領域であって、所定方向の幅の60%の領域である。言い換えると、表示面100の仮想線13から仮想線14までの間の領域である。 The second region R2 of the display surface 100 is a region between the pair of first regions R1 among the regions of the display surface 100. That is, the second region R2 is a central region in the predetermined direction among the regions of the display surface 100, and is a region that is 60% of the width in the predetermined direction. In other words, it is an area between the virtual line 13 and the virtual line 14 on the display surface 100.
 つまり、表示パネル1は、シャーシ2に支持されることにより、表示面100の一対の第一領域R1が平面となり、かつ、表示面100の第二領域R2が凹状に湾曲している曲率半径1500mmの曲面となる。なお、表示面100の第二領域R2が凹状に湾曲しているとは、表示パネル1が背面側に凸になるように湾曲していることと同じである。 That is, the display panel 1 is supported by the chassis 2 so that the pair of first regions R1 of the display surface 100 becomes a flat surface and the second region R2 of the display surface 100 is curved in a concave shape with a radius of curvature of 1500 mm. The curved surface. Note that the second region R2 of the display surface 100 being curved in a concave shape is the same as that the display panel 1 is curved so as to be convex toward the back side.
 (特徴)
 本実施の形態に係る表示装置10によれば、表示パネル1の表示面100において、表示面100の所定方向の両端に位置する領域であって、それぞれが表示面100の所定方向の幅の20%の幅を有する一対の第一領域R1が平面であり、かつ、一対の第一領域R1の間の第二領域R2が凹状に湾曲している曲率半径1500mmの曲面である。
(Characteristic)
According to the display device 10 according to the present embodiment, in the display surface 100 of the display panel 1, the regions are located at both ends of the display surface 100 in a predetermined direction, each having a width 20 in the predetermined direction of the display surface 100. The pair of first regions R1 having a width of% is a flat surface, and the second region R2 between the pair of first regions R1 is a curved surface having a curvature radius of 1500 mm that is curved in a concave shape.
 このように、表示装置10は、視聴者が表示装置10の中央を正面として表示面100を視聴する場合に、表示面100における正面から所定方向にずれた位置の領域であって、表示面100の所定方向の両端における位置の領域(つまり、一対の第一領域R1)を平面としている。このため、表示面100の全体が曲面である場合よりも、一対の第一領域R1では、視聴者に近づく距離を低減することができ、かつ、視聴者から一対の第一領域R1までの距離と、第二領域R2までの距離とを異ならせることができる。このため、視聴者における当該一対の第一領域R1に表示される映像がひずんで見えたり、一対の第一領域R1において焦点が合って見えたりするといった見え方の違和感を低減できる。さらに、表示装置10は、所定方向の両端の一対の第一領域R1が視聴者に近づく構成を維持しているため、視聴者の視界を表示面100で覆う構造を維持できる。つまり、本実施の形態に係る表示装置10では、視聴者の視界を表示面100で覆う構造を維持しつつ、所定方向の両端の一対の第一領域R1の見え方の違和感を低減できる。 As described above, the display device 10 is a region at a position shifted in a predetermined direction from the front surface on the display surface 100 when the viewer views the display surface 100 with the center of the display device 10 in front. The regions of the positions at both ends in the predetermined direction (that is, the pair of first regions R1) are flat. For this reason, compared with the case where the whole display surface 100 is a curved surface, in a pair of 1st field R1, the distance which approaches a viewer can be reduced, and the distance from a viewer to a pair of 1st field R1 And the distance to the second region R2 can be made different. For this reason, it is possible to reduce a sense of discomfort in how the viewer sees the video displayed in the pair of first regions R1 distorted or looks in focus in the pair of first regions R1. Furthermore, since the display device 10 maintains a configuration in which the pair of first regions R1 at both ends in a predetermined direction are close to the viewer, the display device 10 can maintain a structure in which the viewer's field of view is covered with the display surface 100. That is, in the display device 10 according to the present embodiment, it is possible to reduce discomfort in the appearance of the pair of first regions R1 at both ends in a predetermined direction while maintaining a structure that covers the viewer's field of view with the display surface 100.
 (変形例)
 (1)
 上記実施の形態に係る表示装置10では、シャーシ2は、表示パネル1の一対の第一領域R1と第二領域R2との両方の領域で支持しているが、これに限らない。例えば、図8に示すように、表示パネル1の第二領域R2のみを支持するシャーシ2aが採用された表示装置10aとしてもよい。つまり、シャーシ2aは、表示パネル1の第二領域R2に対向する曲率半径5000mm以下の曲板であり、表示パネル1の第二領域R2のみにおいて表示パネル1を支持する。このようなシャーシ2aを採用しても、シャーシ2aは、表示パネル1の第二領域R2が曲率半径1500mmの曲面となるように、表示パネル1を支持することができる。また、表示パネル1は、表示パネル1の一対の第一領域R1において支持されないため、平面のままとすることができる。
(Modification)
(1)
In the display device 10 according to the above-described embodiment, the chassis 2 is supported by both the pair of the first region R1 and the second region R2 of the display panel 1, but is not limited thereto. For example, as shown in FIG. 8, a display device 10a may be employed in which a chassis 2a that supports only the second region R2 of the display panel 1 is employed. That is, the chassis 2a is a curved plate having a curvature radius of 5000 mm or less facing the second region R2 of the display panel 1, and supports the display panel 1 only in the second region R2 of the display panel 1. Even when such a chassis 2a is employed, the chassis 2a can support the display panel 1 so that the second region R2 of the display panel 1 is a curved surface having a curvature radius of 1500 mm. Further, since the display panel 1 is not supported in the pair of first regions R1 of the display panel 1, it can be kept flat.
 (2)
 また、上記実施の形態に係る表示装置10、10aでは、表示面100のサイズが55インチで説明したが、20インチ以上であれば55インチに限定されない。つまり、本開示の効果は、表示面のサイズが20インチ以上の表示装置において顕著に現れる。
(2)
In the display devices 10 and 10a according to the above-described embodiment, the display surface 100 has been described as having a size of 55 inches. However, the display device is not limited to 55 inches as long as it is 20 inches or more. That is, the effect of the present disclosure is remarkably exhibited in a display device having a display surface size of 20 inches or more.
 (3)
 また、上記実施の形態に係る表示装置10、10aでは、表示パネル1は、表示面100の一対の第一領域R1が平面となり、かつ、表示面100の第二領域R2が曲率半径1500mmの曲面であると説明したが、これに限らない。表示パネルは、表示面の一対の第一領域R1が平面となることに限らずに、表示面の一対の第一領域R1が凹状に湾曲している10000mm以上の曲面となっていても良い。また、表示パネルは、表示面の第二領域R2が5000mm以下の曲面となっていても良い。表示装置は、上記の数値範囲で表示パネルを構成しても、上記実施の形態に係る表示装置10と同様の効果を得ることができる。
(3)
In the display devices 10 and 10a according to the above-described embodiments, the display panel 1 is a curved surface in which the pair of first regions R1 of the display surface 100 is a flat surface and the second region R2 of the display surface 100 is a curvature radius of 1500 mm. However, the present invention is not limited to this. The display panel is not limited to the pair of first regions R1 on the display surface being a flat surface, and the pair of first regions R1 on the display surface may be a curved surface having a concave shape of 10,000 mm or more. In the display panel, the second region R2 of the display surface may be a curved surface having a length of 5000 mm or less. The display device can obtain the same effects as those of the display device 10 according to the above-described embodiment even if the display panel is configured in the above numerical range.
 (4)
 また、上記実施の形態に係る表示装置10では、一対の第一領域R1が表示面100の所定方向の幅の20%の領域であり、かつ、第二領域R2が表示面100の所定方向の幅の60%の領域であると説明したがこれに限らない。一対の第一領域は、一対の辺のそれぞれから表示面100の所定方向の幅の10%以上20%以下の領域であればよい。つまり、第二領域R2は、表示面100の領域のうちで所定方向の中央の領域であって、所定方向の幅の60%以上80%以下の領域であればよい。表示装置は、上記の数値範囲で表示パネルを構成しても、上記実施の形態に係る表示装置10と同様の効果を得ることができる。
(4)
In the display device 10 according to the above embodiment, the pair of first regions R1 is a region that is 20% of the width in the predetermined direction of the display surface 100, and the second region R2 is in the predetermined direction of the display surface 100. Although it has been described that the region is 60% of the width, the present invention is not limited to this. The pair of first regions may be regions that are 10% or more and 20% or less of the width in the predetermined direction of the display surface 100 from each of the pair of sides. That is, the second region R2 may be a central region in the predetermined direction among the regions of the display surface 100 and may be a region that is 60% to 80% of the width in the predetermined direction. The display device can obtain the same effects as those of the display device 10 according to the above-described embodiment even if the display panel is configured in the above numerical range.
 (5)
 また、上記実施の形態に係る表示装置10では、表示パネル1に有機ELパネルを採用しているが、これに限らずに、液晶パネルであってもよいし、プラズマパネルであってもよい。
(5)
Further, in the display device 10 according to the above-described embodiment, the organic EL panel is adopted as the display panel 1, but not limited to this, a liquid crystal panel or a plasma panel may be used.
 (6)
 また、上記実施の形態に係る表示装置10、10aでは、シャーシ2、2aは、表示パネル1の背面を面で支持する板状の支持部材であるが、これに限らずに、表示パネル1の背面を複数の線または複数の点で支持する支持部材であってもよい。
(6)
Further, in the display devices 10 and 10a according to the above-described embodiment, the chassis 2 and 2a are plate-like support members that support the back surface of the display panel 1 with a surface. It may be a support member that supports the back surface with a plurality of lines or a plurality of points.
 以上のように、本開示における技術の例示として、実施の形態を説明した。そのために、添付図面および詳細な説明を提供した。 As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.
 したがって、添付図面および詳細な説明に記載された構成要素の中には、課題解決のために必須な構成要素だけでなく、上記技術を例示するために、課題解決のためには必須でない構成要素も含まれ得る。そのため、それらの必須ではない構成要素が添付図面や詳細な説明に記載されていることをもって、直ちに、それらの必須ではない構成要素が必須であるとの認定をするべきではない。 Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.
 また、上述の実施の形態は、本開示における技術を例示するためのものであるから、請求の範囲またはその均等の範囲において種々の変更、置き換え、付加、省略などを行うことができる。 In addition, since the above-described embodiment is for illustrating the technique in the present disclosure, various modifications, replacements, additions, omissions, and the like can be performed within the scope of the claims or an equivalent scope thereof.
 本開示は、表示面が曲面である表示装置において、視聴者におけるその両端の見え方の違和感を低減できる有機EL表示装置、液晶表示装置、およびプラズマ表示装置などとして有用である。 The present disclosure is useful as an organic EL display device, a liquid crystal display device, a plasma display device, and the like that can reduce discomfort in the way the viewer sees both ends of a display device having a curved display surface.
  1  表示パネル
  2、2a  シャーシ
  3  エスカッションフレーム
  4  バックカバー
  5~9  電気回路基板
 10、10a  表示装置
 11、12  辺
 13、14  仮想線
 50  スタンド
100  表示面
101  薄膜トランジスタアレイ装置
102  陽極
103  発光層
104  陰極
105  画素
106  画素回路
107  ゲート配線
108  ソース配線
109  電源配線
110  薄膜トランジスタ
110d  ドレイン電極
110s  ソース電極
111  薄膜トランジスタ
111d  ドレイン電極
111s  ソース電極
112  キャパシタ
121  ベース基板
122  薄膜トランジスタアレイ装置
123  陽極
124  正孔輸送層
125  発光層
126  電子輸送層
127  陰極
128  バンク
129  封止層
130  接着層
131  封止用基板
 R1  第一領域
 R2  第二領域
DESCRIPTION OF SYMBOLS 1 Display panel 2, 2a Chassis 3 Escussion frame 4 Back cover 5-9 Electric circuit board 10, 10a Display apparatus 11, 12 Side 13, 14 Virtual line 50 Stand 100 Display surface 101 Thin-film transistor array apparatus 102 Anode 103 Light emitting layer 104 Cathode 105 Pixel 106 Pixel circuit 107 Gate wiring 108 Source wiring 109 Power supply wiring 110 Thin film transistor 110d Drain electrode 110s Source electrode 111 Thin film transistor 111d Drain electrode 111s Source electrode 112 Capacitor 121 Base substrate 122 Thin film transistor array device 123 Anode 124 Hole transport layer 125 Light emitting layer 126 Electron Transport layer 127 Cathode 128 Bank 129 Sealing layer 130 Adhesive layer 131 Sealing substrate R1 First region R2 Second area

Claims (6)

  1.  矩形状の表示面のサイズが20インチ以上である表示パネルを備え、
     前記表示パネルの前記表示面において、(i)前記表示面の所定方向の両端に位置する領域であって、前記表示面の前記所定方向の幅の10%以上20%以下の幅をそれぞれが有する一対の第一領域が平面または曲率半径10000mm以上の曲面であり、かつ、(ii)前記一対の第一領域の間の第二領域が凹状に湾曲している曲率半径5000mm以下の曲面である
     表示装置。
    A display panel having a rectangular display surface size of 20 inches or more is provided.
    In the display surface of the display panel, (i) regions located at both ends of the display surface in a predetermined direction, each having a width of 10% to 20% of the width of the display surface in the predetermined direction. The pair of first regions is a flat surface or a curved surface having a curvature radius of 10,000 mm or more, and (ii) the second region between the pair of first regions is a curved surface having a curvature radius of 5000 mm or less curved in a concave shape. apparatus.
  2.  さらに、
     前記表示パネルが前記表示面の反対側に向けて凸になるように、前記表示パネルの前記表示面の反対側を支持するシャーシを備え、
     前記シャーシは、(i)前記一対の第一領域が平面または曲率半径10000mm以上の曲面になるように、かつ、(ii)前記第二領域が曲率半径5000mm以下の曲面になるように、前記表示パネルを支持する
     請求項1に記載の表示装置。
    further,
    A chassis that supports the opposite side of the display surface of the display panel so that the display panel is convex toward the opposite side of the display surface;
    The chassis is configured so that (i) the pair of first regions is a flat surface or a curved surface having a curvature radius of 10,000 mm or more, and (ii) the second region is a curved surface having a curvature radius of 5000 mm or less. The display device according to claim 1, wherein the display device supports a panel.
  3.  前記シャーシは、前記表示パネルの前記一対の第一領域および前記第二領域の前記表示面の反対側において前記表示パネルを支持する
     請求項2に記載の表示装置。
    The display device according to claim 2, wherein the chassis supports the display panel on a side opposite to the display surface of the pair of first region and the second region of the display panel.
  4.  前記シャーシは、
     前記表示パネルの前記一対の第一領域に対向する一対の第一部分が平板または曲率半径10000mm以上の曲板であり、かつ、前記表示パネルの前記第二領域に対向する第二部分が曲率半径5000mm以下の曲板であり、
     前記表示パネルの前記一対の第一領域における前記表示面の反対側を前記一対の第一部分で支持し、かつ、前記第二領域における前記表示面の反対側を前記第二部分で支持する
     請求項3に記載の表示装置。
    The chassis is
    The pair of first portions facing the pair of first regions of the display panel is a flat plate or a curved plate having a curvature radius of 10000 mm or more, and the second portion of the display panel facing the second region is a curvature radius of 5000 mm. The following curved plates,
    The opposite side of the display surface in the pair of first regions of the display panel is supported by the pair of first portions, and the opposite side of the display surface in the second region is supported by the second portions. 3. The display device according to 3.
  5.  前記シャーシは、前記表示パネルの前記第二領域のみにおける前記表示面の反対側を支持する
     請求項2に記載の表示装置。
    The display device according to claim 2, wherein the chassis supports an opposite side of the display surface only in the second region of the display panel.
  6.  前記シャーシは、前記表示パネルの前記第二領域に対向する曲率半径5000mm以下の曲板である
     請求項5に記載の表示装置。
    The display device according to claim 5, wherein the chassis is a curved plate having a radius of curvature of 5000 mm or less facing the second region of the display panel.
PCT/JP2014/002171 2013-12-11 2014-04-16 Display device WO2015087461A1 (en)

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