WO2020178922A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2020178922A1
WO2020178922A1 PCT/JP2019/008208 JP2019008208W WO2020178922A1 WO 2020178922 A1 WO2020178922 A1 WO 2020178922A1 JP 2019008208 W JP2019008208 W JP 2019008208W WO 2020178922 A1 WO2020178922 A1 WO 2020178922A1
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WO
WIPO (PCT)
Prior art keywords
display device
layer
display panel
display
electrode
Prior art date
Application number
PCT/JP2019/008208
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French (fr)
Japanese (ja)
Inventor
坂井　彰
雅浩 長谷川
将臣 桑原
隆行 夏目
箕浦　潔
龍三 結城
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シャープ株式会社
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Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to PCT/JP2019/008208 priority Critical patent/WO2020178922A1/en
Publication of WO2020178922A1 publication Critical patent/WO2020178922A1/en

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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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details

Definitions

  • the present invention relates to a display device.
  • Patent Document 1 discloses a method of providing a light diffusion adhesive layer on one side of a polarizer for the purpose of reducing the parallax of a liquid crystal display device.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2010-250297
  • the phenomenon that the light emitted from the display panel to the air layer is reflected in the display device and incident on the display panel causes double reflection of the image.
  • a display device includes a display panel, a diffusion adhesive layer, an anti-glare film, an air layer, and a transparent housing in order from the lower side with the upper side as the viewing side.
  • light reflected from the display panel into the air layer and reflected in the display device is scattered by the anti-glare film, and thus it is possible to suppress double reflection of an image.
  • FIG. 1A is a schematic plan view showing the configuration of the display device of the first embodiment
  • FIG. 1B is a cross-sectional view showing the configuration of the display device of the first embodiment.
  • It is sectional drawing which shows the structure of the display device of Embodiment 1.
  • FIG. It is sectional drawing which shows the structure of the display device of Embodiment 2.
  • 4A and 4B are top views of the display device
  • FIGS. 4C to 4E are side views of the display device.
  • It is sectional drawing which shows another structure of the display device of Embodiment 3.
  • FIG. 1A is a schematic plan view showing the configuration of the display device of the present embodiment
  • FIG. 1B is a sectional view showing the configuration of the display device.
  • the display device 2 is provided with a display panel 30, a diffusion adhesive layer 35, an anti-glare film 37, an air layer 50, and a translucent member 70 in order from the lower side with the upper side as the viewing side.
  • a base material 12 As shown in FIG. 1, in the display panel 30, a base material 12, a barrier layer 3, a TFT layer 4, a top emission type light emitting element layer 5, and a sealing layer 6 are arranged in order from the lower layer.
  • a display area DA for example, a plurality of sub-pixels SP each including a self-luminous element X are formed.
  • the base material 12 may be a glass substrate or a flexible substrate including a resin film such as polyimide.
  • a flexible substrate can also be constituted by two layers of resin films and an inorganic insulating film sandwiched between them.
  • the barrier layer 3 is a layer that prevents foreign matters such as water and oxygen from entering the TFT layer 4 and the light emitting element layer 5, and is formed by, for example, a CVD method, which is a silicon oxide film, a silicon nitride film, or an oxynitride film. It can be composed of a silicon film or a laminated film thereof.
  • the TFT (thin film transistor) layer 4 includes, for example, a semiconductor layer (including the semiconductor film 15) above the barrier layer 3 and an inorganic insulating film 16 (gate including a semiconductor film 15 above the semiconductor layer).
  • a semiconductor layer including the semiconductor film 15
  • an inorganic insulating film 16 gate including a semiconductor film 15 above the semiconductor layer.
  • a metal layer including the capacitive electrode CE
  • an inorganic insulating film 20 above the second metal layer a third metal layer (including the data signal line DL) above the inorganic insulating film 20, and a third metal
  • the flattening film 21 above the layer is included.
  • the semiconductor layer is composed of, for example, amorphous silicon, LTPS (low temperature polysilicon), or an oxide semiconductor, and the thin film transistor TR is composed so as to include the gate electrode GE and the semiconductor film 15.
  • a light emitting element X and a pixel circuit thereof are provided for each sub-pixel SP in the display area DA, and the pixel circuit and wiring connected to the pixel circuit are formed in the TFT layer 4.
  • the wirings connected to the pixel circuit for example, the scanning signal line GL and the emission control line EM formed in the first metal layer, the initialization power supply line IL formed in the second metal layer, and the third metal layer are formed.
  • the pixel circuit includes a drive transistor that controls the current of the light emitting element, a write transistor that is electrically connected to the scanning signal line, a light emission control transistor that is electrically connected to the light emission control line, and the like.
  • the first metal layer, the second metal layer, and the third metal layer are composed of, for example, a single-layer film or a multi-layer film of a metal containing at least one of aluminum, tungsten, molybdenum, tantalum, chromium, titanium, and copper. To be done.
  • the inorganic insulating films 16, 18, and 20 can be formed of, for example, a silicon oxide (SiOx) film, a silicon nitride (SiNx) film, or a laminated film thereof formed by a CVD method.
  • the flattening film 21 can be made of a coatable organic material such as polyimide or acrylic resin.
  • the light emitting element layer 5 includes a first electrode (lower electrode) 22 above the planarization film 21, an insulating edge cover film 23 that covers an edge of the first electrode 22, and an EL above the edge cover film 23. It includes an (electroluminescence) layer 24 and a second electrode (upper electrode) 25 that is an upper layer than the EL layer 24.
  • the edge cover film 23 is formed, for example, by applying an organic material such as polyimide or acrylic resin and then patterning it by photolithography.
  • a light emitting element Xr red
  • a light emitting element Xg green
  • a light emitting element Xb blue
  • each light emitting element has an island-shaped first electrode 22 and an EL layer 24 ( The light emitting layer EK is included), and the second electrode 25 is included.
  • the second electrode 25 is a solid common electrode common to a plurality of light emitting elements.
  • the light emitting elements Xr, Xg, and Xb may be, for example, OLEDs (organic light emitting diodes) that include organic layers as light emitting layers, or QLEDs (quantum dot light emitting diodes) that include quantum dot layers as light emitting layers. Good.
  • OLEDs organic light emitting diodes
  • QLEDs quantum dot light emitting diodes
  • the EL layer 24 is composed of, for example, laminating a hole injection layer, a hole transport layer, a light emitting layer EK, an electron transport layer, and an electron injection layer in this order from the lower layer side.
  • the light emitting layer is formed in an island shape in the opening (for each sub pixel) of the edge cover film 23 by a vapor deposition method, an inkjet method, or a photolithography method.
  • the other layers are formed in an island shape or a solid shape (common layer). It is also possible to adopt a configuration in which one or more layers out of the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are not formed.
  • the first electrode 22 is a light reflecting electrode containing silver, aluminum, etc., and is composed of, for example, a laminate of ITO (Indium Tin Oxide) and an alloy containing Ag (silver) or Ag.
  • the second electrode 25 is made of, for example, a metal thin film such as a magnesium-silver alloy, and is light transmissive.
  • the driving current between the first electrode 22 and the second electrode 25 causes holes and electrons to recombine in the light emitting layer EK, and the excitons generated thereby become the ground state.
  • Light is emitted in the transition process.
  • the light emitting elements Xr, Xg, and Xb are QLEDs, holes and electrons are recombined in the light emitting layer EK by the driving current between the first electrode 22 and the second electrode 25, and the resulting exciton is a quantum dot.
  • Light (fluorescence) is emitted in the process of transition from the conduction band level to the valence band level.
  • the sealing layer 6 that covers the light emitting element layer 5 is a layer that prevents foreign substances such as water and oxygen from penetrating into the light emitting element layer 5.
  • FIG. 2 is a cross-sectional view showing the configuration of the display device of the first embodiment.
  • the upper side is the viewing side
  • the display panel 30, the diffusion adhesive layer 35, the anti-glare film 37, the air layer 50, and the transparent housing (translucent member) that is a translucent member are arranged in this order from the lower side. Housing 70k).
  • the diffusion adhesive layer 35 includes an adhesive and spherical diffusion particles.
  • the anti-glare film 37 is, for example, an antiglare film obtained by forming irregularities on the upper surface (viewing side surface) of a TAC (triacetyl cellulose) film.
  • the anti-glare film 37 and the transparent casing 70k are arranged with a space therebetween, and for example, an air layer 50 having a thickness of 10 mm is provided between the anti-glare film 37 and the transparent casing 70k.
  • Acrylic adhesive with excellent heat resistance and transparency is used as the adhesive, but rubber adhesive, acrylic adhesive, urethane adhesive, silicone adhesive, epoxy adhesive, cellulose adhesive An adhesive or the like may be used.
  • Acrylic-styrene copolymer resin (refractive index can be adjusted between 1.49 and 1.60 by adjusting the copolymerization ratio of acrylic and styrene) is used as the diffusion particles, but silicon resin (refractive index) is used. Rate 1.42), inorganic silica (refractive index 1.43), polymethylmethacrylate resin (refractive index 1.49), acrylic-styrene copolymer resin (refractive index 1.55), melamine resin (refractive index 1.57) ), Polycarbonate resin (refractive index 1.57), styrene resin (refractive index 1.60), benzoguanamine-melamine formaldehyde resin (refractive index 1.68) and the like may be used.
  • the film thickness 30 ⁇ m
  • the refractive index of the pressure-sensitive adhesive 1.47
  • the refractive index of the diffusion particles 1.595
  • the difference in refractive index between the pressure-sensitive adhesive and the diffusion particles 0.125.
  • the particle diameter (average particle diameter) of the diffusing particles is 1.3 ⁇ m
  • the haze (according to JIS K-7136) is 92.6%.
  • the refractive index of the diffused particles is 1.42 to 1.70
  • the refractive index of the pressure-sensitive adhesive is 1.45 to 1.55
  • the difference in the refractive index between the diffused particles and the pressure-sensitive adhesive is 0.07 to 0.25.
  • the haze of the diffusion adhesive layer 35 is preferably 40 to 99%.
  • the light RF emitted from the display panel 30 and reflected by the transparent housing 70 or the like is scattered by the anti-glare film 37, so that the double reflection of the image is eliminated. If the light RF reflected by the transparent housing 70 or the like is incident on the display panel 30 and is re-reflected by the display panel 30 (particularly, the first electrode (light reflecting electrode) 22), a double reflection may occur.
  • the external light WF incident on the air layer 50 is also scattered by the anti-glare film 37, so that the bone see-through (when the display panel 30 is in the OFF state, the phenomenon such that the electrodes and wirings in the display panel can be seen through) is eliminated.
  • a 1/4 ⁇ plate and an absorption polarizing plate may be provided in order to prevent double reflection and bone see-through, but in the first embodiment, since the 1/4 ⁇ plate and the absorption polarizing plate (linear polarizing plate) are not included, display The thickness of the device 2 can be reduced. Further, the utilization efficiency of the light from the light emitting element layer 5 is also improved.
  • the front white light (extreme angle 0 °) from the diffused adhesive layer 35 of the first embodiment includes white light WWs derived from front white emission light WW (small tint) from the panel and oblique white emission light WB from the panel.
  • White light WBs derived from (large tint) is included, and the oblique white light (for example, polar angle 60 °) from the diffused adhesive layer 35 is white derived from the front white emitted light WW (small tint) from the panel.
  • the light WWn and the white light WBn derived from the oblique white emitted light WB (large color tone) from the panel are included. Therefore, it is possible to suppress a tint change (for example, an increase in bluishness) due to oblique visual recognition.
  • the oblique white emitted light WB has a stronger (larger) tint (bluish or reddish) than the front white emitted light WW because it is a microcavity of each color emitting element (a microcavity for improving color purity and luminous efficiency). ) This is because the structure is designed with reference to the front direction (panel normal direction). Depending on the waveform profile of each color, the oblique white emitted light WB becomes bluish, and the bluish change due to the polar angle becomes large.
  • the display device 2 of the first embodiment may be, for example, a mirror display in which the first electrode 22 (light reflecting electrode) functions as a mirror when the light emitting element layer 5 is not lit.
  • FIG. 3 is a cross-sectional view showing the configuration of the display device of the second embodiment.
  • the upper side is the viewing side
  • the display panel 30, the diffusion adhesive layer 35, the anti-glare film 37, the air layer 50, and the half mirror 70h that is a translucent member are arranged in this order from the lower side.
  • the half mirror 70h is provided on the air layer side of the transparent casing 70k.
  • the anti-glare film 37 and the half mirror 70h are arranged with a space therebetween, and for example, an air layer 50 having a thickness of 10 mm is provided between the anti-glare film 37 and the half mirror 70h.
  • the half mirror 70h has a semi-transmissive characteristic, reflects a part of the light from the outside, and transmits a part of the light from the inside (light from the display panel 30), so that the display device 2 has a mirror surface function. And also has an image display function.
  • the display panel 30 may function as a mirror surface when it is OFF (non-display), or may function as a mirror surface when the display panel 30 is ON (display state).
  • the half mirror 70h is configured to include, for example, a transparent substrate and a semitransparent metal layer formed on the transparent substrate.
  • the light RF emitted from the display panel 30 and reflected by the half mirror 70h is scattered by the anti-glare film 37, so that the double reflection of the image is eliminated.
  • the external light WF that has entered the air layer 50 is also scattered by the anti-glare film 37, so that the panel see-through (when the display panel 30 is in the OFF state, the phenomenon that the display panel or the like can be seen through the half mirror) is eliminated. ..
  • the front white light (polar angle 0°) from the diffusion adhesive layer 35 of the first embodiment includes white light WWs and white light WBs, and oblique white light from the diffusion adhesive layer 35 (for example, polar angle 60°). Includes white light WWn and white light WBn. Therefore, it is possible to suppress a tint change (for example, an increase in bluishness) due to oblique visual recognition.
  • FIGS. 4C to 4E are side views of the display device.
  • one rectangular display panel 30 is included in the edge of the translucent member 70 (which may include a half mirror) in a plan view, but the present invention is not limited to this.
  • a plurality of rectangular display panels 30 may be included in the edge of the half mirror 70h as shown in FIG. 4A, or a deformed shape (non-rectangular) may be included in the edge of the half mirror 70h as shown in FIG. 4B.
  • both the half mirror 70h and the display panel 30 may be flat as shown in FIG.
  • FIG. 4C or a curved surface is displayed on the flat half mirror 70h as shown in FIG. 4D.
  • the panel 30a and the flat display panel 30b may be combined, or as shown in FIG. 4E, the curved half mirror 70h is combined with the curved display panel 30a and the flat display panel 30b. May be.
  • FIG. 5 is a cross-sectional view showing another configuration example of the display device.
  • the display panel 30 may be a flexible display panel, and the display panel 30 may have a curved surface shape that is convex toward the half mirror 70h.
  • the half mirror 70h is shown as a curved surface in FIG. 5, it may be a flat surface.
  • the display panel 30 has a curved shape, the change in tint is particularly large, and the configuration of the second embodiment suppresses the change in tint.
  • FIG. 6 is a cross-sectional view showing the configuration of the display device of the third embodiment.
  • a frame-shaped decorative print 70p may be provided on the air layer side of the half mirror 70h. This prevents the system board mounted on the display panel 30 from seeing through (shielding), Any color, pattern, and frame shape that matches the design of the product can be realized.
  • the decorative printing unit 70p may be configured to overlap with the end of the display area DA of the display panel 30.
  • the light transmittance of the decorative printing section 70p is, for example, less than 10%.
  • FIG. 7 is a cross-sectional view showing another configuration of the display device of the third embodiment.
  • the diffusion adhesive layer 35 in the above embodiment may be replaced with a colored diffusion adhesive layer 35'.
  • the diffusion adhesive layer 35' is obtained by adding a colorant to the diffusion adhesive layer 35 in the above embodiment.
  • a diffusion adhesive layer 35 ′ obtained by adding a black colorant to the diffusion adhesive layer 35 in the above-described embodiment, the decorative printing portion 70 p and the display area when not illuminated.
  • the same color as DA black, etc.
  • the display panel is an EL display QLED (Quantum) such as an organic EL display, an organic EL (Electro Luminescence) display equipped with an OLED (Organic Light Emitting Diode), or an inorganic EL display equipped with an inorganic light emitting diode.
  • EL display QLED Quantum
  • OLED Organic Light Emitting Diode
  • OLED Organic Light Emitting Diode
  • inorganic EL display equipped with an inorganic light emitting diode inorganic light emitting diode.
  • Dot Light Emitting Diode A QLED display with a quantum dot light emitting diode.
  • a display device having a display panel, a diffusion adhesive layer, an anti-glare film, an air layer, and a transparent housing in this order from the bottom with the upper side as the viewing side.
  • Aspect 3 The display device according to, for example, Aspect 1 or 2, wherein a frame-shaped decorative printing unit is provided on the air layer side of the transparent housing.
  • the refractive index of the diffused particles is 1.42 to 1.70.
  • the refractive index of the pressure-sensitive adhesive is 1.45 to 1.55.
  • the refractive index difference between the diffusing particles and the adhesive is 0.07 to 0.25,
  • the display panel includes a first electrode, a light emitting layer, and a second electrode in this order from the bottom.
  • the display device according to, for example, the tenth aspect, which is a mirror display in which the first electrode serves as a mirror.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Electroluminescent Light Sources (AREA)

Abstract

This display device (2) includes a display panel (30) of which the upper side is a viewing side, the display device being provided with, from the bottom side, the display panel (30), a diffusing adhesive layer (35), an antiglare film (37), an air layer (50), and a translucent member (70).

Description

表示装置Display device
　本発明は、表示装置に関する。 The present invention relates to a display device.
　特許文献１には、液晶表示装置の視差の低減を目的として、偏光子の片側に光拡散粘着層を設ける手法が開示されている。 Patent Document 1 discloses a method of providing a light diffusion adhesive layer on one side of a polarizer for the purpose of reducing the parallax of a liquid crystal display device.
日本国公開特許公報「特開２０１０－２５０２９７」Japanese Patent Publication "Japanese Patent Laid-Open No. 2010-250297"
　表示パネルの視認側に空気層を含む表示装置においては、表示パネルから空気層に出た光が表示装置内で反射して表示パネルに入射する現象が映像の二重映りの原因となる。 In a display device that includes an air layer on the visual side of the display panel, the phenomenon that the light emitted from the display panel to the air layer is reflected in the display device and incident on the display panel causes double reflection of the image.
　本発明の一実施形態にかかる表示装置は、上側を視認側とし、下側から順に、表示パネル、拡散粘着層、アンチグレアフィルム、空気層、および透明筐体を備える。 A display device according to an embodiment of the present invention includes a display panel, a diffusion adhesive layer, an anti-glare film, an air layer, and a transparent housing in order from the lower side with the upper side as the viewing side.
　本発明の一態様によれば、表示パネルから空気層に出て、表示装置内で反射した光はアンチグレアフィルムによって散乱するため、映像の二重映りを抑制することができる。 According to one aspect of the present invention, light reflected from the display panel into the air layer and reflected in the display device is scattered by the anti-glare film, and thus it is possible to suppress double reflection of an image.
図１（ａ）は、実施形態１の表示装置の構成を示す模式的平面図であり、図１（ｂ）は、実施形態１の表示装置の構成を示す断面図である。FIG. 1A is a schematic plan view showing the configuration of the display device of the first embodiment, and FIG. 1B is a cross-sectional view showing the configuration of the display device of the first embodiment. 実施形態１の表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the display device of Embodiment 1. FIG. 実施形態２の表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the display device of Embodiment 2. 図４（ａ）（ｂ）は、表示装置の上面図であり、図４（ｃ）～（ｅ）は、表示装置の側面図である。4A and 4B are top views of the display device, and FIGS. 4C to 4E are side views of the display device. 実施形態２の表示装置の別構成を示す断面図である。It is sectional drawing which shows another structure of the display device of Embodiment 2. 実施形態３の表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the display device of Embodiment 3. 実施形態３の表示装置の別構成を示す断面図である。It is sectional drawing which shows another structure of the display device of Embodiment 3.
　図１（ａ）は、本実施形態の表示装置の構成を示す模式的平面図であり、図１（ｂ）は、表示装置の構成を示す断面図である。 1A is a schematic plan view showing the configuration of the display device of the present embodiment, and FIG. 1B is a sectional view showing the configuration of the display device.
　表示装置２は、上側を視認側として、下側から順に、表示パネル３０、拡散粘着層３５、アンチグレアフィルム３７、空気層５０、および透光部材７０を備える。 The display device 2 is provided with a display panel 30, a diffusion adhesive layer 35, an anti-glare film 37, an air layer 50, and a translucent member 70 in order from the lower side with the upper side as the viewing side.
　図１のように、表示パネル３０では、下層から順に、基材１２、バリア層３、ＴＦＴ層４、トップエミッション型の発光素子層５、および封止層６が配される。表示領域ＤＡには、例えば、それぞれが自発光素子Ｘを含む複数のサブ画素ＳＰが形成される。 As shown in FIG. 1, in the display panel 30, a base material 12, a barrier layer 3, a TFT layer 4, a top emission type light emitting element layer 5, and a sealing layer 6 are arranged in order from the lower layer. In the display area DA, for example, a plurality of sub-pixels SP each including a self-luminous element X are formed.
　基材１２は、ガラス基板でもよいし、ポリイミド等の樹脂膜を含む可撓性基板でもよい。２層の樹脂膜およびこれらに挟まれた無機絶縁膜によって可撓性基板を構成することもできる。 The base material 12 may be a glass substrate or a flexible substrate including a resin film such as polyimide. A flexible substrate can also be constituted by two layers of resin films and an inorganic insulating film sandwiched between them.
　バリア層３は、水、酸素等の異物がＴＦＴ層４および発光素子層５に侵入することを防ぐ層であり、例えば、ＣＶＤ法により形成される、酸化シリコン膜、窒化シリコン膜、あるいは酸窒化シリコン膜、またはこれらの積層膜で構成することができる。 The barrier layer 3 is a layer that prevents foreign matters such as water and oxygen from entering the TFT layer 4 and the light emitting element layer 5, and is formed by, for example, a CVD method, which is a silicon oxide film, a silicon nitride film, or an oxynitride film. It can be composed of a silicon film or a laminated film thereof.
　図１（ｂ）に示すように、ＴＦＴ（薄膜トランジスタ）層４は、例えば、バリア層３よりも上層の半導体層（半導体膜１５を含む）と、半導体層よりも上層の無機絶縁膜１６（ゲート絶縁膜）と、無機絶縁膜１６よりも上層の第１金属層（ゲート電極ＧＥを含む）と、第１金属層よりも上層の無機絶縁膜１８と、無機絶縁膜１８よりも上層の第２金属層（容量電極ＣＥを含む）と、第２金属層よりも上層の無機絶縁膜２０と、無機絶縁膜２０よりも上層の第３金属層（データ信号線ＤＬを含む）と、第３金属層よりも上層の平坦化膜２１とを含む。 As shown in FIG. 1B, the TFT (thin film transistor) layer 4 includes, for example, a semiconductor layer (including the semiconductor film 15) above the barrier layer 3 and an inorganic insulating film 16 (gate including a semiconductor film 15 above the semiconductor layer). (Insulating film), a first metal layer (including the gate electrode GE) above the inorganic insulating film 16, an inorganic insulating film 18 above the first metal layer, and a second metal layer above the inorganic insulating film 18. A metal layer (including the capacitive electrode CE), an inorganic insulating film 20 above the second metal layer, a third metal layer (including the data signal line DL) above the inorganic insulating film 20, and a third metal The flattening film 21 above the layer is included.
　半導体層は、例えば、アモルファスシリコン、ＬＴＰＳ（低温ポリシリコン）、または酸化物半導体で構成され、ゲート電極ＧＥおよび半導体膜１５を含むように、薄膜トランジスタＴＲが構成される。 The semiconductor layer is composed of, for example, amorphous silicon, LTPS (low temperature polysilicon), or an oxide semiconductor, and the thin film transistor TR is composed so as to include the gate electrode GE and the semiconductor film 15.
　表示領域ＤＡには、サブ画素ＳＰごとに発光素子Ｘおよびその画素回路が設けられ、ＴＦＴ層４には、この画素回路およびこれに接続する配線が形成される。画素回路に接続する配線としては、例えば、第１金属層に形成される、走査信号線ＧＬおよび発光制御線ＥＭ、第２金属層に形成される初期化電源線ＩＬ、第３金属層に形成される、データ信号線ＤＬおよび高電圧側電源線ＰＬ等が挙げられる。画素回路には、発光素子の電流を制御する駆動トランジスタ、走査信号線と電気的に接続する書き込みトランジスタ、および発光制御線に電気的に接続する発光制御トランジスタ等が含まれる。 A light emitting element X and a pixel circuit thereof are provided for each sub-pixel SP in the display area DA, and the pixel circuit and wiring connected to the pixel circuit are formed in the TFT layer 4. As the wirings connected to the pixel circuit, for example, the scanning signal line GL and the emission control line EM formed in the first metal layer, the initialization power supply line IL formed in the second metal layer, and the third metal layer are formed. The data signal line DL, the high voltage side power supply line PL, and the like. The pixel circuit includes a drive transistor that controls the current of the light emitting element, a write transistor that is electrically connected to the scanning signal line, a light emission control transistor that is electrically connected to the light emission control line, and the like.
　第１金属層、第２金属層、および第３金属層は、例えば、アルミニウム、タングステン、モリブデン、タンタル、クロム、チタン、および銅の少なくとも１つを含む金属の単層膜あるいは複層膜によって構成される。 The first metal layer, the second metal layer, and the third metal layer are composed of, for example, a single-layer film or a multi-layer film of a metal containing at least one of aluminum, tungsten, molybdenum, tantalum, chromium, titanium, and copper. To be done.
　無機絶縁膜１６・１８・２０は、例えば、ＣＶＤ法によって形成された、酸化シリコン（ＳｉＯｘ）膜あるいは窒化シリコン（ＳｉＮｘ）膜またはこれらの積層膜によって構成することができる。平坦化膜２１は、例えば、ポリイミド、アクリル樹脂等の塗布可能な有機材料によって構成することができる。 The inorganic insulating films 16, 18, and 20 can be formed of, for example, a silicon oxide (SiOx) film, a silicon nitride (SiNx) film, or a laminated film thereof formed by a CVD method. The flattening film 21 can be made of a coatable organic material such as polyimide or acrylic resin.
　発光素子層５は、平坦化膜２１よりも上層の第１電極（下部電極）２２と、第１電極２２のエッジを覆う絶縁性のエッジカバー膜２３と、エッジカバー膜２３よりも上層のＥＬ（エレクトロルミネッセンス）層２４と、ＥＬ層２４よりも上層の第２電極（上部電極）２５とを含む。エッジカバー膜２３は、例えば、ポリイミド、アクリル樹脂等の有機材料を塗布した後にフォトリソグラフィよってパターニングすることで形成される。 The light emitting element layer 5 includes a first electrode (lower electrode) 22 above the planarization film 21, an insulating edge cover film 23 that covers an edge of the first electrode 22, and an EL above the edge cover film 23. It includes an (electroluminescence) layer 24 and a second electrode (upper electrode) 25 that is an upper layer than the EL layer 24. The edge cover film 23 is formed, for example, by applying an organic material such as polyimide or acrylic resin and then patterning it by photolithography.
　発光素子層５には、例えば、発光素子Ｘｒ（赤色）、発光素子Ｘｇ（緑色）および発光素子Ｘｂ（青色）が形成され、各発光素子が、島状の第１電極２２、ＥＬ層２４（発光層ＥＫを含む）、および第２電極２５を含む。第２電極２５は、複数の発光素子で共通する、ベタ状の共通電極である。 On the light emitting element layer 5, for example, a light emitting element Xr (red), a light emitting element Xg (green) and a light emitting element Xb (blue) are formed, and each light emitting element has an island-shaped first electrode 22 and an EL layer 24 ( The light emitting layer EK is included), and the second electrode 25 is included. The second electrode 25 is a solid common electrode common to a plurality of light emitting elements.
　発光素子Ｘｒ・Ｘｇ・Ｘｂは、例えば、発光層として有機層を含むＯＬＥＤ（有機発光ダイオード）であってもよいし、発光層として量子ドット層を含むＱＬＥＤ（量子ドット発光ダイオード）であってもよい。 The light emitting elements Xr, Xg, and Xb may be, for example, OLEDs (organic light emitting diodes) that include organic layers as light emitting layers, or QLEDs (quantum dot light emitting diodes) that include quantum dot layers as light emitting layers. Good.
　ＥＬ層２４は、例えば、下層側から順に、正孔注入層、正孔輸送層、発光層ＥＫ、電子輸送層、電子注入層を積層することで構成される。発光層は、蒸着法あるいはインクジェット法、フォトリソグラフィ法によって、エッジカバー膜２３の開口（サブ画素ごと）に、島状に形成される。他の層は、島状あるいはベタ状（共通層）に形成する。また、正孔注入層、正孔輸送層、電子輸送層、電子注入層のうち１以上の層を形成しない構成とすることもできる。 The EL layer 24 is composed of, for example, laminating a hole injection layer, a hole transport layer, a light emitting layer EK, an electron transport layer, and an electron injection layer in this order from the lower layer side. The light emitting layer is formed in an island shape in the opening (for each sub pixel) of the edge cover film 23 by a vapor deposition method, an inkjet method, or a photolithography method. The other layers are formed in an island shape or a solid shape (common layer). It is also possible to adopt a configuration in which one or more layers out of the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are not formed.
　第１電極２２は、銀、アルミニウム等を含む光反射電極であり、例えば、ＩＴＯ（Indiuｍ Tin Oxide）とＡｇ（銀）あるいはＡｇを含む合金との積層によって構成される。第２電極２５は、例えばマグネシウム銀合金等の金属薄膜 で構成され、光透過性を有する。 The first electrode 22 is a light reflecting electrode containing silver, aluminum, etc., and is composed of, for example, a laminate of ITO (Indium Tin Oxide) and an alloy containing Ag (silver) or Ag. The second electrode 25 is made of, for example, a metal thin film such as a magnesium-silver alloy, and is light transmissive.
　発光素子Ｘｒ・Ｘｇ・ＸｂがＯＬＥＤである場合、第１電極２２および第２電極２５間の駆動電流によって正孔と電子が発光層ＥＫ内で再結合し、これによって生じたエキシトンが基底状態に遷移する過程で光が放出される。発光素子Ｘｒ・Ｘｇ・ＸｂがＱＬＥＤである場合、第１電極２２および第２電極２５間の駆動電流によって正孔と電子が発光層ＥＫ内で再結合し、これによって生じたエキシトンが、量子ドットの伝導帯準位（conduction band）から価電子帯準位（valence band）に遷移する過程で光（蛍光）が放出される。 When the light emitting elements Xr, Xg, and Xb are OLEDs, the driving current between the first electrode 22 and the second electrode 25 causes holes and electrons to recombine in the light emitting layer EK, and the excitons generated thereby become the ground state. Light is emitted in the transition process. When the light emitting elements Xr, Xg, and Xb are QLEDs, holes and electrons are recombined in the light emitting layer EK by the driving current between the first electrode 22 and the second electrode 25, and the resulting exciton is a quantum dot. Light (fluorescence) is emitted in the process of transition from the conduction band level to the valence band level.
　発光素子層５を覆う封止層６は、水、酸素等の異物の発光素子層５への浸透を防ぐ層であり、例えば、２層の無機封止膜とこれら間に形成される有機膜とで構成することができる。 The sealing layer 6 that covers the light emitting element layer 5 is a layer that prevents foreign substances such as water and oxygen from penetrating into the light emitting element layer 5. For example, a two-layer inorganic sealing film and an organic film formed between them. It can be composed of and.
　〔実施形態１〕
　図２は、実施形態１の表示装置の構成を示す断面図である。実施形態１の表示装置２は、上側を視認側とし、下側から順に、表示パネル３０、拡散粘着層３５、アンチグレアフィルム３７、空気層５０、および透光部材である透明筐体（透光性を有する筐体）７０ｋを備える。拡散粘着層３５は、粘着剤と球形の拡散粒子を含む。アンチグレアフィルム３７は、例えば、ＴＡＣ（トリアセチルセルロース）フィルムの上面（視認側の面）に凹凸を形成して得られる防眩フィルムである。 [Embodiment 1]
FIG. 2 is a cross-sectional view showing the configuration of the display device of the first embodiment. In the display device 2 of the first embodiment, the upper side is the viewing side, and the display panel 30, the diffusion adhesive layer 35, the anti-glare film 37, the air layer 50, and the transparent housing (translucent member) that is a translucent member are arranged in this order from the lower side. Housing 70k). The diffusion adhesive layer 35 includes an adhesive and spherical diffusion particles. The anti-glare film 37 is, for example, an antiglare film obtained by forming irregularities on the upper surface (viewing side surface) of a TAC (triacetyl cellulose) film.
　アンチグレアフィルム３７と透明筐体７０ｋとは間隔を空けて配置されており、例えば、厚さ１０ｍｍの空気層５０が、アンチグレアフィルム３７と透明筐体７０ｋとの間に設けられている。 The anti-glare film 37 and the transparent casing 70k are arranged with a space therebetween, and for example, an air layer 50 having a thickness of 10 mm is provided between the anti-glare film 37 and the transparent casing 70k.
　粘着剤には、耐熱性および透明性に優れたアクリル系粘着剤を用いているが、ゴム系粘着剤、アクリル系粘着剤、ウレタン系粘着剤、シリコン系粘着剤、エポキシ系粘着剤、セルロース系粘着剤等を用いてもよい。 Acrylic adhesive with excellent heat resistance and transparency is used as the adhesive, but rubber adhesive, acrylic adhesive, urethane adhesive, silicone adhesive, epoxy adhesive, cellulose adhesive An adhesive or the like may be used.
　拡散粒子としては、アクリル－スチレン共重合樹脂（アクリルとスチレンの共重合比を調整することで屈折率を１．４９～１．６０の間で調整可能）を用いているが、シリコン樹脂（屈折率１．４２）、無機シリカ（屈折率１．４３）、ポリメチルメタクリレート樹脂（屈折率１．４９）、アクリル－スチレン共重合樹脂（屈折率１．５５）、メラミン樹脂（屈折率１．５７）、ポリカーボネート樹脂（屈折率１．５７）、スチレン樹脂（屈折率１．６０）、ベンゾグアナミン－メラミンホルムアルデヒド樹脂（屈折率１．６８）等を用いてもよい。 Acrylic-styrene copolymer resin (refractive index can be adjusted between 1.49 and 1.60 by adjusting the copolymerization ratio of acrylic and styrene) is used as the diffusion particles, but silicon resin (refractive index) is used. Rate 1.42), inorganic silica (refractive index 1.43), polymethylmethacrylate resin (refractive index 1.49), acrylic-styrene copolymer resin (refractive index 1.55), melamine resin (refractive index 1.57) ), Polycarbonate resin (refractive index 1.57), styrene resin (refractive index 1.60), benzoguanamine-melamine formaldehyde resin (refractive index 1.68) and the like may be used.
　図２の構成では、拡散粘着層３５について、膜厚＝３０μｍ、粘着剤の屈折率＝１．４７、拡散粒子 の屈折率＝1.５９５、粘着剤と拡散粒子の屈折率差＝０．１２５、拡散粒子の粒子径（平均粒子径）＝１．３μｍ、ヘイズ（JIS K-7136に準拠）＝９２．６％としている。なお、拡散粒子の屈折率は、１．４２～１．７０、粘着剤の屈折率は、１．４５～１．５５、拡散粒子と粘着剤の屈折率差は、０．０７～０．２５、拡散粘着層３５のヘイズは、４０～９９％であることが望ましい。 In the configuration of FIG. 2, for the diffusion adhesive layer 35, the film thickness = 30 μm, the refractive index of the pressure-sensitive adhesive = 1.47, the refractive index of the diffusion particles = 1.595, and the difference in refractive index between the pressure-sensitive adhesive and the diffusion particles = 0.125. The particle diameter (average particle diameter) of the diffusing particles is 1.3 μm, and the haze (according to JIS K-7136) is 92.6%. The refractive index of the diffused particles is 1.42 to 1.70, the refractive index of the pressure-sensitive adhesive is 1.45 to 1.55, and the difference in the refractive index between the diffused particles and the pressure-sensitive adhesive is 0.07 to 0.25. The haze of the diffusion adhesive layer 35 is preferably 40 to 99%.
　実施形態１では、表示パネル３０から出射し、透明筐体７０等で反射した光ＲＦは、アンチグレアフィルム３７で散乱するため、画像の二重映りが解消される。なお、透明筐体７０等で反射した光ＲＦが表示パネル３０に入射し、表示パネル３０（特に第１電極（光反射電極）２２）で再反射すると、二重映りとなるおそれがある。 In the first embodiment, the light RF emitted from the display panel 30 and reflected by the transparent housing 70 or the like is scattered by the anti-glare film 37, so that the double reflection of the image is eliminated. If the light RF reflected by the transparent housing 70 or the like is incident on the display panel 30 and is re-reflected by the display panel 30 (particularly, the first electrode (light reflecting electrode) 22), a double reflection may occur.
　さらに、空気層５０に入射した外光ＷＦも、アンチグレアフィルム３７で散乱するため、骨透け（表示パネル３０がＯＦＦ状態の時に、表示パネル内の電極および配線等が透けて見える現象）が解消される。 Further, the external light WF incident on the air layer 50 is also scattered by the anti-glare film 37, so that the bone see-through (when the display panel 30 is in the OFF state, the phenomenon such that the electrodes and wirings in the display panel can be seen through) is eliminated. It
　二重映りおよび骨透けを防止するために１／４λ板および吸収偏光板を設ける場合もあるが、実施形態１では、１／４λ板および吸収偏光板（直線偏光板）を含まないため、表示装置２の厚みを小さくすることができる。また、発光素子層５からの光の利用効率も高められる。 A 1/4λ plate and an absorption polarizing plate may be provided in order to prevent double reflection and bone see-through, but in the first embodiment, since the 1/4λ plate and the absorption polarizing plate (linear polarizing plate) are not included, display The thickness of the device 2 can be reduced. Further, the utilization efficiency of the light from the light emitting element layer 5 is also improved.
　実施形態１の拡散粘着層３５からの正面白色光（極角０°）には、パネルからの正面白色出射光ＷＷ（色味小）由来の白色光ＷＷｓと、パネルからの斜め白色出射光ＷＢ（色味大）由来の白色光ＷＢｓとが含まれ、拡散粘着層３５からの斜め白色光（例えば極角６０°）には、パネルからの正面白色出射光ＷＷ（色味小）由来の白色光ＷＷｎと、パネルからの斜め白色出射光ＷＢ（色味大）由来の白色光ＷＢｎとが含まれる。したがって、斜め視認での色味変化（例えば、青みが強くなる）を抑えることができる。 The front white light (extreme angle 0 °) from the diffused adhesive layer 35 of the first embodiment includes white light WWs derived from front white emission light WW (small tint) from the panel and oblique white emission light WB from the panel. White light WBs derived from (large tint) is included, and the oblique white light (for example, polar angle 60 °) from the diffused adhesive layer 35 is white derived from the front white emitted light WW (small tint) from the panel. The light WWn and the white light WBn derived from the oblique white emitted light WB (large color tone) from the panel are included. Therefore, it is possible to suppress a tint change (for example, an increase in bluishness) due to oblique visual recognition.
　なお、斜め白色出射光ＷＢが正面白色出射光ＷＷよりも色味（青みあるいは赤み）が強い（大きい）のは、各色発光素子のマイクロキャビティ（色純度や発光効率を向上させるための 微小共振器）構造が正面方向（パネル法線方向）を基準として設計されているからである。各色の波形プロファイルによっては、 斜め白色出射光ＷＢが青みがかり、極角に伴う青み変化が大きくなる。 The oblique white emitted light WB has a stronger (larger) tint (bluish or reddish) than the front white emitted light WW because it is a microcavity of each color emitting element (a microcavity for improving color purity and luminous efficiency). ) This is because the structure is designed with reference to the front direction (panel normal direction). Depending on the waveform profile of each color, the oblique white emitted light WB becomes bluish, and the bluish change due to the polar angle becomes large.
　実施形態１の表示装置２は、例えば発光素子層５が非点灯のときに第１電極２２（光反射電極）がミラーとして機能するミラーディスプレイであってもよい。 The display device 2 of the first embodiment may be, for example, a mirror display in which the first electrode 22 (light reflecting electrode) functions as a mirror when the light emitting element layer 5 is not lit.
　〔実施形態２〕
　図３は、実施形態２の表示装置の構成を示す断面図である。実施形態２の表示装置２は、上側を視認側とし、下側から順に、表示パネル３０と、拡散粘着層３５と、アンチグレアフィルム３７と、空気層５０と、透光部材である、ハーフミラー７０ｈおよび透明筐体７０ｋとを備える。ハーフミラー７０ｈは、透明筐体７０ｋの空気層側に設けられる。 [Embodiment 2]
FIG. 3 is a cross-sectional view showing the configuration of the display device of the second embodiment. In the display device 2 of the second embodiment, the upper side is the viewing side, and the display panel 30, the diffusion adhesive layer 35, the anti-glare film 37, the air layer 50, and the half mirror 70h that is a translucent member are arranged in this order from the lower side. And a transparent housing 70k. The half mirror 70h is provided on the air layer side of the transparent casing 70k.
　アンチグレアフィルム３７とハーフミラー７０ｈとは間隔を空けて配置されており、例えば、厚さ１０ｍｍの空気層５０が、アンチグレアフィルム３７とハーフミラー７０ｈとの間に設けられている。 The anti-glare film 37 and the half mirror 70h are arranged with a space therebetween, and for example, an air layer 50 having a thickness of 10 mm is provided between the anti-glare film 37 and the half mirror 70h.
　ハーフミラー７０ｈは、半透過特性を有し、外側からの光の一部を反射し、内側からの光（表示パネル３０からの光）の一部を透過させるため、表示装置２は、鏡面機能と画像表示機能を併せ持つ。なお、表示パネル３０がＯＦＦ（非表示）のときに鏡面として機能してもよいし、表示パネル３０がＯＮ（表示状態）のときに鏡面として機能してもよい。ハーフミラー７０ｈは、例えば、透光性基板と、透光性基板上に形成された半透過性のメタル層とを含んで構成される。 The half mirror 70h has a semi-transmissive characteristic, reflects a part of the light from the outside, and transmits a part of the light from the inside (light from the display panel 30), so that the display device 2 has a mirror surface function. And also has an image display function. The display panel 30 may function as a mirror surface when it is OFF (non-display), or may function as a mirror surface when the display panel 30 is ON (display state). The half mirror 70h is configured to include, for example, a transparent substrate and a semitransparent metal layer formed on the transparent substrate.
　実施形態２では、表示パネル３０から出射し、ハーフミラー７０ｈで反射した光ＲＦは、アンチグレアフィルム３７で散乱するため、画像の二重映りが解消される。 In the second embodiment, the light RF emitted from the display panel 30 and reflected by the half mirror 70h is scattered by the anti-glare film 37, so that the double reflection of the image is eliminated.
　さらに、空気層５０に入射した外光ＷＦも、アンチグレアフィルム３７で散乱するため、パネル透け（表示パネル３０がＯＦＦ状態の時に、ハーフミラー内に表示パネル等が透けて見える現象）が解消される。 Further, the external light WF that has entered the air layer 50 is also scattered by the anti-glare film 37, so that the panel see-through (when the display panel 30 is in the OFF state, the phenomenon that the display panel or the like can be seen through the half mirror) is eliminated. ..
　実施形態１の拡散粘着層３５からの正面白色光（極角０°）には、白色光ＷＷｓと白色光ＷＢｓとが含まれ、拡散粘着層３５からの斜め白色光（例えば極角６０°）には、白色光ＷＷｎと白色光ＷＢｎとが含まれる。したがって、斜め視認での色味変化（例えば、青みが強くなる）を抑えることができる。 The front white light (polar angle 0°) from the diffusion adhesive layer 35 of the first embodiment includes white light WWs and white light WBs, and oblique white light from the diffusion adhesive layer 35 (for example, polar angle 60°). Includes white light WWn and white light WBn. Therefore, it is possible to suppress a tint change (for example, an increase in bluishness) due to oblique visual recognition.
　図４（ａ）（ｂ）は、表示装置の上面図であり、図４（ｃ）～（ｅ）は、表示装置の側面図である。図１（ａ）では、平面視において透光性部材７０（ハーフミラーを含んでもよい）のエッジ内に矩形の表示パネル３０が１つ含まれるが、これに限定されない。図４（ａ）のように、ハーフミラー７０ｈのエッジ内に矩形の表示パネル３０が複数含まれる構成でもよいし、図４（ｂ）のように、ハーフミラー７０ｈのエッジ内に異形（非矩形）の表示パネル３０が複数含まれる構成でもよい。また、図４（ｃ）のように、ハーフミラー７０ｈおよび表示パネル３０がともに平面状であってもよいし、図４（ｄ）のように、平面状のハーフミラー７０ｈに、曲面状の表示パネル３０ａと平面状の表示パネル３０ｂとを組み合わせてもよいし、図４（ｅ）のように、曲面状のハーフミラー７０ｈに、曲面状の表示パネル３０ａと平面状の表示パネル３０ｂとを組み合わせてもよい。 4A and 4B are top views of the display device, and FIGS. 4C to 4E are side views of the display device. In FIG. 1A, one rectangular display panel 30 is included in the edge of the translucent member 70 (which may include a half mirror) in a plan view, but the present invention is not limited to this. A plurality of rectangular display panels 30 may be included in the edge of the half mirror 70h as shown in FIG. 4A, or a deformed shape (non-rectangular) may be included in the edge of the half mirror 70h as shown in FIG. 4B. ) May be included in a plurality of display panels 30. Further, both the half mirror 70h and the display panel 30 may be flat as shown in FIG. 4C, or a curved surface is displayed on the flat half mirror 70h as shown in FIG. 4D. The panel 30a and the flat display panel 30b may be combined, or as shown in FIG. 4E, the curved half mirror 70h is combined with the curved display panel 30a and the flat display panel 30b. May be.
　図５は、表示装置の別構成例を示す断面図である。図５のように、表示パネル３０がフレキシブル表示パネルであって、表示パネル３０がハーフミラー７０ｈ側に凸となる曲面状でもよい。図５ではハーフミラー７０ｈを曲面状に記載しているが、平面状でもよい。表示パネル３０が曲面状の場合は特に色味の変化が大きく、実施形態２の構成によって、その色味の変化が抑えられる。 FIG. 5 is a cross-sectional view showing another configuration example of the display device. As shown in FIG. 5, the display panel 30 may be a flexible display panel, and the display panel 30 may have a curved surface shape that is convex toward the half mirror 70h. Although the half mirror 70h is shown as a curved surface in FIG. 5, it may be a flat surface. When the display panel 30 has a curved shape, the change in tint is particularly large, and the configuration of the second embodiment suppresses the change in tint.
　〔実施形態３〕
　図６は、実施形態３の表示装置の構成を示す断面図である。図６のように、ハーフミラー７０ｈの空気層側に、枠状の加飾印刷７０ｐを設けてもよい、こうすれば、表示パネル３０に搭載するシステム基板などの透けを防止（遮光）し、製品の意匠に合わせた任意の色・柄・枠形状を実現することができる。加飾印刷部７０ｐは、表示パネル３０の表示領域ＤＡの端部と重畳する構成でもよい。加飾印刷部７０ｐの光透過率は、例えば１０％未満とする。 [Embodiment 3]
FIG. 6 is a cross-sectional view showing the configuration of the display device of the third embodiment. As shown in FIG. 6, a frame-shaped decorative print 70p may be provided on the air layer side of the half mirror 70h. This prevents the system board mounted on the display panel 30 from seeing through (shielding), Any color, pattern, and frame shape that matches the design of the product can be realized. The decorative printing unit 70p may be configured to overlap with the end of the display area DA of the display panel 30. The light transmittance of the decorative printing section 70p is, for example, less than 10%.
　図７は、実施形態３の表示装置の別構成を示す断面図である。前記実施形態での拡散粘着層３５を、着色された拡散粘着層３５’に置き換えてもよい。拡散粘着層３５’は、上記実施形態での拡散粘着層３５に着色剤を添加して得られる。例えば図７のように、前記実施形態での拡散粘着層３５に黒の着色剤を添加して得られる拡散粘着層３５’を設けることで、加飾印刷部７０ｐと、非点灯時の表示領域ＤＡとを同色（黒等）とすることができる。この場合、拡散粘着層３５’の全面、あるいは、拡散粘着層３５’のうち、少なくとも加飾印刷７０ｐと重なる領域を着色することが望ましい。 FIG. 7 is a cross-sectional view showing another configuration of the display device of the third embodiment. The diffusion adhesive layer 35 in the above embodiment may be replaced with a colored diffusion adhesive layer 35'. The diffusion adhesive layer 35' is obtained by adding a colorant to the diffusion adhesive layer 35 in the above embodiment. For example, as shown in FIG. 7, by providing a diffusion adhesive layer 35 ′ obtained by adding a black colorant to the diffusion adhesive layer 35 in the above-described embodiment, the decorative printing portion 70 p and the display area when not illuminated. The same color as DA (black, etc.) can be used. In this case, it is desirable to color the entire surface of the diffusion adhesive layer 35' or at least a region of the diffusion adhesive layer 35' that overlaps the decorative print 70p.
　表示パネルは、有機ＥＬディスプレイ、ＯＬＥＤ（Organic Light Emitting Diode：有機発光ダイオード）を備えた有機ＥＬ（Electro Luminescence：エレクトロルミネッセンス）ディスプレイ、又は無機発光ダイオードを備えた無機ＥＬディスプレイ等のＥＬディスプレイＱＬＥＤ（Quantum dot Light Emitting Diode：量子ドット発光ダイオード）を備えたＱＬＥＤディスプレイである
　上述の各実施形態は、例示および説明を目的とするものであり、限定を目的とするものではない。これら例示および説明に基づけば、多くの変形形態が可能になることが、当業者には明らかである。 The display panel is an EL display QLED (Quantum) such as an organic EL display, an organic EL (Electro Luminescence) display equipped with an OLED (Organic Light Emitting Diode), or an inorganic EL display equipped with an inorganic light emitting diode. Dot Light Emitting Diode: A QLED display with a quantum dot light emitting diode. The embodiments described above are for purposes of illustration and description, not limitation. Based on these examples and explanations, it will be apparent to those skilled in the art that many variants are possible.
　〔まとめ〕
　〔態様１〕
　上側を視認側とし、下側から順に、表示パネル、拡散粘着層、アンチグレアフィルム、空気層、および透明筐体を備える表示装置。 [Summary]
[Aspect 1]
A display device having a display panel, a diffusion adhesive layer, an anti-glare film, an air layer, and a transparent housing in this order from the bottom with the upper side as the viewing side.
　〔態様２〕
　前記透明筐体の空気層側に、ハーフミラーが設けられている、例えば態様１に記載の表示装置。 [Aspect 2]
The display device according to, for example, the first aspect, wherein a half mirror is provided on the air layer side of the transparent housing.
　〔態様３〕
　前記透明筐体の空気層側に、枠状の加飾印刷部が設けられている、例えば態様１または２に記載の表示装置。 [Aspect 3]
The display device according to, for example, Aspect 1 or 2, wherein a frame-shaped decorative printing unit is provided on the air layer side of the transparent housing.
　〔態様４〕
　前記加飾印刷部は、前記表示パネルの表示領域の端部と重畳する、例えば態様３に記載の表示装置。 [Mode 4]
The display device according to, for example, the third aspect, wherein the decorative printing unit overlaps with an end portion of a display area of the display panel.
　〔態様５〕
　前記加飾印刷部の光透過率は１０％未満である、例えば態様３または４に記載の表示装置。 [Aspect 5]
The display device according to, for example, aspect 3 or 4, wherein the light transmittance of the decorative printing unit is less than 10%.
　〔態様６〕
　前記表示パネルはフレキシブル表示パネルであって、前記表示パネルが前記ハーフミラー側に凸となる曲面形状である、例えば態様２に記載の表示装置。 [Aspect 6]
The display device according to, for example, the second aspect, wherein the display panel is a flexible display panel and has a curved surface shape in which the display panel is convex toward the half mirror side.
　〔態様７〕
　前記拡散粘着層は、着色剤を含む、例えば態様１～６のいずれか１つに記載の表示装置。 [Aspect 7]
The display device according to any one of aspects 1 to 6, for example, wherein the diffusion adhesive layer contains a colorant.
　〔態様８〕
　前記拡散粘着層は、球状の拡散粒子と粘着剤とを含む、例えば態様１～７のいずれか１つに記載の表示装置。 [Aspect 8]
The display device according to any one of aspects 1 to 7, for example, wherein the diffusion adhesive layer contains spherical diffusion particles and an adhesive.
　〔態様９〕
　前記拡散粒子の屈折率は、１．４２～１．７０であり、
　前記粘着剤の屈折率は、１．４５～１．５５であり、
　前記拡散粒子と粘着剤の屈折率差は、０．０７～０．２５であり、
　前記拡散粘着層のヘイズは、４０～９９％である、例えば態様８に記載の表示装置。 [Aspect 9]
The refractive index of the diffused particles is 1.42 to 1.70.
The refractive index of the pressure-sensitive adhesive is 1.45 to 1.55.
The refractive index difference between the diffusing particles and the adhesive is 0.07 to 0.25,
The display device according to, for example, aspect 8, wherein the haze of the diffusion adhesive layer is 40 to 99%.
　〔態様１０〕
　直線偏光板および１／４λ板を含まない、例えば態様１～９のいずれか１つに記載の表示装置。 [Aspect 10]
The display device according to any one of aspects 1 to 9, for example, which does not include a linear polarizing plate and a 1 / 4λ plate.
　〔態様１１〕
　前記表示パネルは、下側から順に、第１電極、発光層、および第２電極を含み、
　前記第１電極がミラーとなるミラーディスプレイである、例えば態様１０に記載の表示装置。 [Aspect 11]
The display panel includes a first electrode, a light emitting layer, and a second electrode in this order from the bottom.
The display device according to, for example, the tenth aspect, which is a mirror display in which the first electrode serves as a mirror.
　２　表示装置
　４　ＴＦＴ層
　５　発光素子層
　２１　平坦化膜
　２２　第１電極（光反射電極）
　２３　エッジカバー膜
　２４　ＥＬ層
　２５　第２電極
　３０　表示パネル
　３５　拡散粘着層
　３７　アンチグレアフィルム
　５０　空気層
　７０ｈ　ハーフミラー
　７０ｋ　透明筐体
　７０ｐ　加飾印刷 2 Display device 4 TFT layer 5 Light emitting element layer 21 Flattening film 22 First electrode (light reflecting electrode)
23 Edge Cover Film 24 EL Layer 25 Second Electrode 30 Display Panel 35 Diffusion Adhesive Layer 37 Anti-Glare Film 50 Air Layer 70h Half Mirror 70k Transparent Housing 70p Decorative Printing

Claims (11)

  1. 　上側を視認側とし、下側から順に、表示パネル、拡散粘着層、アンチグレアフィルム、空気層、および透明筐体を備える表示装置。 A display device that has a display panel, a diffusion adhesive layer, an anti-glare film, an air layer, and a transparent housing in order from the lower side with the upper side as the viewing side.
  2. 　前記透明筐体の空気層側に、ハーフミラーが設けられている請求項１に記載の表示装置。 The display device according to claim 1, wherein a half mirror is provided on the air layer side of the transparent housing.
  3. 　前記透明筐体の空気層側に、枠状の加飾印刷部が設けられている請求項１または２に記載の表示装置。 The display device according to claim 1 or 2, wherein a frame-shaped decorative printing section is provided on the air layer side of the transparent housing.
  4. 　前記加飾印刷部は、前記表示パネルの表示領域の端部と重畳する請求項３に記載の表示装置。 The display device according to claim 3, wherein the decorative printing section overlaps an end portion of a display area of the display panel.
  5. 　前記加飾印刷部の光透過率は１０％未満である請求項３または４に記載の表示装置。 The display device according to claim 3 or 4, wherein the decorative printing portion has a light transmittance of less than 10%.
  6. 　前記表示パネルはフレキシブル表示パネルであって、前記表示パネルが前記ハーフミラー側に凸となる曲面形状である請求項２に記載の表示装置。 The display device according to claim 2, wherein the display panel is a flexible display panel, and the display panel has a curved surface shape that is convex toward the half mirror.
  7. 　前記拡散粘着層は、着色剤を含む請求項１～６のいずれか１項に記載の表示装置。 The display device according to any one of claims 1 to 6, wherein the diffusion adhesive layer contains a coloring agent.
  8. 　前記拡散粘着層は、球状の拡散粒子と粘着剤とを含む請求項１～７のいずれか１項に記載の表示装置。 The display device according to any one of claims 1 to 7, wherein the diffusion adhesive layer contains spherical diffusion particles and an adhesive.
  9. 　前記拡散粒子の屈折率は、１．４２～１．７０であり、
    　前記粘着剤の屈折率は、１．４５～１．５５であり、
    　前記拡散粒子と粘着剤の屈折率差は、０．０７～０．２５であり、
    　前記拡散粘着層のヘイズは、４０～９９％である請求項８に記載の表示装置。     The refractive index of the diffused particles is 1.42 to 1.70.
    The refractive index of the pressure-sensitive adhesive is 1.45 to 1.55.
    The refractive index difference between the diffusing particles and the adhesive is 0.07 to 0.25,
    The display device according to claim 8, wherein the haze of the diffusion adhesive layer is 40 to 99%.
  10. 　直線偏光板および１／４λ板を含まない請求項１～９のいずれか１項に記載の表示装置。 The display device according to any one of claims 1 to 9, which does not include a linearly polarizing plate and a 1/4λ plate.
  11. 　前記表示パネルは、下側から順に、第１電極、発光層、および第２電極を含み、
    　前記第１電極がミラーとなるミラーディスプレイである請求項１０に記載の表示装置。
     
     
     
     
     
     
     
     
     
     
     
     
     
     
          The display panel includes a first electrode, a light emitting layer, and a second electrode in this order from the bottom.
    The display device according to claim 10, wherein the first electrode is a mirror display.














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WO2023163143A1 (en) * 2022-02-28 2023-08-31 日東電工株式会社 Adhesive film for oled display device
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