WO2020178922A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage 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
Other languages
English (en)
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
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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/fr
Publication of WO2020178922A1 publication Critical patent/WO2020178922A1/fr

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Classifications

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

Abstract

L'invention concerne un dispositif d'affichage (2) qui comprend un panneau d'affichage (30) dont le côté supérieur est un côté de visualisation, le dispositif d'affichage comportant, à partir du côté inférieur, le panneau d'affichage (30), une couche adhésive de diffusion (35), un film antireflet (37), une couche d'air (50), et un élément translucide (70).
PCT/JP2019/008208 2019-03-01 2019-03-01 Dispositif d'affichage WO2020178922A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/008208 WO2020178922A1 (fr) 2019-03-01 2019-03-01 Dispositif d'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/008208 WO2020178922A1 (fr) 2019-03-01 2019-03-01 Dispositif d'affichage

Publications (1)

Publication Number Publication Date
WO2020178922A1 true WO2020178922A1 (fr) 2020-09-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023163144A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Stratifié optique pour dispositif d'affichage à delo
WO2023163148A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Stratifié optique pour dispositif d'affichage à diode électroluminescente organique
WO2023163143A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Film adhésif pour dispositif d'affichage à delo

Citations (9)

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Publication number Priority date Publication date Assignee Title
JP2000039607A (ja) * 1998-07-23 2000-02-08 Sumitomo Chem Co Ltd 反射型液晶表示装置
JP2000314875A (ja) * 1999-04-28 2000-11-14 Sumitomo Chem Co Ltd 液晶表示装置
JP2001201741A (ja) * 2000-01-20 2001-07-27 Sharp Corp 液晶表示装置
JP2003302506A (ja) * 2002-02-08 2003-10-24 Dainippon Printing Co Ltd 防眩性フィルムおよび画像表示装置
CN1670574A (zh) * 2004-03-17 2005-09-21 统宝光电股份有限公司 镜面显示器
WO2010143552A1 (fr) * 2009-06-09 2010-12-16 独立行政法人科学技術振興機構 Dispositif d'affichage à cristaux liquides du type à transmission
US20130314648A1 (en) * 2012-05-25 2013-11-28 Benjamin M. Rappoport Display With Broadband Antireflection Film
US20140016043A1 (en) * 2012-07-13 2014-01-16 Apple Inc. Touch Screen Display with Transparent Electrical Shielding Layer
WO2014112525A1 (fr) * 2013-01-16 2014-07-24 シャープ株式会社 Affichage à miroir, plaque semi-réfléchissante et dispositif électronique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000039607A (ja) * 1998-07-23 2000-02-08 Sumitomo Chem Co Ltd 反射型液晶表示装置
JP2000314875A (ja) * 1999-04-28 2000-11-14 Sumitomo Chem Co Ltd 液晶表示装置
JP2001201741A (ja) * 2000-01-20 2001-07-27 Sharp Corp 液晶表示装置
JP2003302506A (ja) * 2002-02-08 2003-10-24 Dainippon Printing Co Ltd 防眩性フィルムおよび画像表示装置
CN1670574A (zh) * 2004-03-17 2005-09-21 统宝光电股份有限公司 镜面显示器
WO2010143552A1 (fr) * 2009-06-09 2010-12-16 独立行政法人科学技術振興機構 Dispositif d'affichage à cristaux liquides du type à transmission
US20130314648A1 (en) * 2012-05-25 2013-11-28 Benjamin M. Rappoport Display With Broadband Antireflection Film
US20140016043A1 (en) * 2012-07-13 2014-01-16 Apple Inc. Touch Screen Display with Transparent Electrical Shielding Layer
WO2014112525A1 (fr) * 2013-01-16 2014-07-24 シャープ株式会社 Affichage à miroir, plaque semi-réfléchissante et dispositif électronique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023163144A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Stratifié optique pour dispositif d'affichage à delo
WO2023163148A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Stratifié optique pour dispositif d'affichage à diode électroluminescente organique
WO2023163143A1 (fr) * 2022-02-28 2023-08-31 日東電工株式会社 Film adhésif pour dispositif d'affichage à delo

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