WO2020178921A1 - Affichage à miroir - Google Patents

Affichage à miroir Download PDF

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Publication number
WO2020178921A1
WO2020178921A1 PCT/JP2019/008206 JP2019008206W WO2020178921A1 WO 2020178921 A1 WO2020178921 A1 WO 2020178921A1 JP 2019008206 W JP2019008206 W JP 2019008206W WO 2020178921 A1 WO2020178921 A1 WO 2020178921A1
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WO
WIPO (PCT)
Prior art keywords
diffusion
adhesive layer
film
adhesive
refractive index
Prior art date
Application number
PCT/JP2019/008206
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English (en)
Japanese (ja)
Inventor
将臣 桑原
隆行 夏目
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.)
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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/JP2019/008206 priority Critical patent/WO2020178921A1/fr
Publication of WO2020178921A1 publication Critical patent/WO2020178921A1/fr

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    • 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
    • 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

Definitions

  • the present invention relates to a mirror display.
  • Patent Document 1 discloses a mirror display (display device having a mirror surface function) using an organic EL as a light emitting element.
  • the conventional mirror display has a problem that the change in color of oblique visual recognition (for example, bluish or reddish of white light) is large with respect to frontal visual recognition.
  • a mirror display includes a display panel, a diffusion adhesive layer, a first film, an air layer, and a half mirror in order from the lower layer, and the diffusion adhesive layer includes spherical diffusion particles and an adhesive.
  • 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 refractive index between the diffused particles and the pressure-sensitive adhesive is 0. It is from 07 to 0.25
  • the haze of the diffusion adhesive layer is from 40 to 99%.
  • a mirror display in a mirror display, it is possible to suppress a change in color tint between oblique viewing and front viewing.
  • FIG. 1A is a schematic plan view showing the configuration of the mirror display of the first embodiment
  • FIG. 1B is a cross-sectional view showing the configuration of the mirror display of the first embodiment
  • 2C to 2E are side views of the mirror display.
  • 3 is a cross-sectional view showing the configuration of the mirror display of Example 1 (characteristics of the diffusion adhesive layer and visual recognition characteristics are additionally shown).
  • FIG. 6 is a cross-sectional view showing a configuration of a mirror display of Example 2.
  • FIG. 7 is a cross-sectional view showing the configuration of a mirror display of Example 3.
  • FIG. 9 is a cross-sectional view showing the structure of a mirror display of Example 4.
  • FIG. 9 is a cross-sectional view showing the configuration of the mirror display of Example 5; 16 is a cross-sectional view showing the configuration of a mirror display of Example 6.
  • FIG. It is sectional drawing which shows the structure of the mirror display of Example 7. It is sectional drawing which shows the structure of the mirror display of Example 8.
  • 16 is a cross-sectional view showing the configuration of the mirror display of Example 9.
  • FIG. 7 is a cross-sectional view showing a configuration of a mirror display of Comparative Example 1.
  • FIG. 7 is a cross-sectional view showing the configuration of a mirror display of Comparative Example 2.
  • FIG. 11 is a cross-sectional view showing a configuration of a mirror display of Comparative Example 3.
  • FIG. It is sectional drawing which shows the structural example of a mirror display.
  • FIG. 1 (a) is a schematic plan view showing the configuration of the mirror display of the present embodiment
  • FIG. 1 (b) is a cross-sectional view showing the configuration of the mirror display
  • 2 (a) and 2 (b) are plan views (top views) of the mirror display
  • FIGS. 2 (c) to 2 (e) are side views of the mirror display.
  • a display panel 30 for example, a panel in which a self-luminous element is used for subpixels
  • a functional layer 40 for example, a panel in which a self-luminous element is used for subpixels
  • an air layer 50 for example, a half mirror 60
  • a protective cover 70 is arranged in order from the lower layer.
  • the half mirror 60 has a semi-transmissive property, reflects a part of the light from the outside and allows a part of the light from the inside (light from the display panel 30) to pass through. Therefore, the mirror display 2 has a mirror surface function. Also has a 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 60 includes, for example, a translucent substrate and a semi-transmissive metal layer formed on the translucent substrate.
  • the functional layer 40 and the half mirror 60 are arranged at intervals. For example, an air layer 50 having a thickness of 10 mm is provided between the functional layer 40 and the half mirror 60.
  • one rectangular display panel 30 is included in the edge of the half mirror 60 in a plan view, but the invention is not limited to this.
  • the edge of the half mirror 60 may include a plurality of rectangular display panels 30.
  • the edge of the half mirror 60 may have an irregular shape (non-rectangular shape).
  • the configuration may include a plurality of display panels 30).
  • both the half mirror 60 and the display panel 30 may be flat as shown in FIG. 2C, or a curved display may be displayed on the flat half mirror 60 as shown in FIG. 2D.
  • the panel 30a and the flat display panel 30b may be combined, or as shown in FIG. 2E, the curved half mirror 60 may be combined with the curved display panel 30a and the flat display panel 30b. May be.
  • 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, and a display area DA is provided. A plurality of sub-pixels SP each including the 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 made of, for example, a stack of ITO (Indium Tin Oxide) and Ag (silver) or an alloy containing Ag, and has light reflectivity.
  • the second electrode 25 is made of, for example, a metal thin film of magnesium-silver alloy or the like, and has optical transparency.
  • 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. 3 is a cross-sectional view showing the structure of the mirror display of Example 1 (characteristics of the diffusion adhesive layer and visual recognition characteristics are added).
  • the functional layer 40 of Example 1 is, in order from the lower layer side, an acrylic transparent adhesive layer CA1, a 1/4 ⁇ plate 43, an acrylic transparent adhesive layer CA2, an absorption polarizing plate 46, a diffusion adhesive containing an adhesive and spherical diffusion particles.
  • a transparent film 47 (first film FF) in which a hard coat layer made of an acrylic UV curable resin is provided on a layer KL and a TAC (triacetyl cellulose) film is provided.
  • 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 1 / 4 ⁇ plate 43 is a film in which rod-shaped or disk-shaped liquid crystal molecules, inverse wavelength-dispersible polycarbonate, or the like are uniaxially oriented by an alignment film or stretching (for example, an in-plane retardation Re at a wavelength of 550 nm is approximately 137 nm. ) Is performed, and linearly polarized light is converted to circularly polarized light or circularly polarized light is converted to linearly polarized light.
  • an alignment film or stretching for example, an in-plane retardation Re at a wavelength of 550 nm is approximately 137 nm.
  • the absorption polarizing plate 46 is, for example, a uniaxially stretched iodine dyeing type absorption polarizing plate, and transmits only specific linearly polarized light.
  • the angle formed by the slow axis of the 1/4 ⁇ plate 43 and the transmission axis or the absorption axis of the absorption polarizing plate 46 is 45°.
  • the front white light (extreme angle 0 °) from the diffusion adhesive layer KL of Example 1 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 oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint).
  • the light WWn and the white light WBn derived from the oblique white emitted light WB (large color tone) from the panel are included.
  • Comparative Example 1 of FIG. 12 in which the diffusion adhesive layer KL is replaced with the adhesive layer NL (front white light is composed of front white emission light WW from the panel, and oblique white light is oblique white emission light WB from the panel It is possible to suppress the tint change (for example, the bluish becomes stronger) when viewed obliquely.
  • the oblique white emitted light WB has a larger (stronger) tint (bluer or reddish) than the front white emitted light WW is because of the microcavity of each color light emitting element (a microresonator for improving color purity and luminous efficiency). This is because the structure is designed based on the front direction (panel normal direction). Depending on the waveform profile of each color, the oblique white emission light WB becomes bluish and the bluish change due to the polar angle becomes large. In the configuration of FIG.
  • the film thickness 30 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.595
  • the refractive index difference between the adhesive and the diffusing particles 0.125.
  • the particle size (average particle size) of the diffusing particles 1.3 ⁇ m
  • the haze (according to JIS K-7136) 92.6%
  • the oblique white light with respect to the front white light (polar angle 0°) of the mirror display 2 The change in tint at a polar angle of 60 °) is evaluated.
  • the mirror display 2 is displayed in white, the hue in the polar angle 0° direction (panel normal direction) and the hue in the polar angle 60° direction are obtained using a goniometer, and the difference between these hues is calculated.
  • the absolute value ⁇ b is measured. The closer ⁇ b is to zero, the closer the hues in the front direction and the oblique direction are, and the case of 0 ⁇ ⁇ b ⁇ 10 is “particularly excellent”, the case of 10 ⁇ b ⁇ 20 is “excellent”, and 20 ⁇ b.
  • the case of ⁇ 30 is judged to be “good”, and the case of ⁇ b>30 is judged to be “poor” (the improvement effect is not recognized).
  • the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, most of the external light WF reflected by the first electrode (reflection electrode) or the wiring or the second electrode 25 of the display panel 30 is absorbed by the absorption polarizing plate 46, and the panel is transparent (when the display panel 30 is in the OFF state. Sometimes, the phenomenon that the display panel 30 can be seen through the half mirror 60) is eliminated. Similarly, with respect to the light emitted from the display panel 30 and reflected by the display panel 30 after being reflected by the half mirror 60, most of the light is absorbed by the absorption polarizing plate 46, so that double reflection of an image is eliminated.
  • FIG. 4 is a sectional view showing the structure of the mirror display of the second embodiment.
  • the functional layer 40 of Example 2 is, in order from the lower layer side, a transparent adhesive layer CA, a 1/4 ⁇ plate 43, a diffusion adhesive layer KL containing an adhesive and spherical diffusion particles, and an absorption polarizing plate 46 (first film FF). Equipped with.
  • the front white light (extreme angle 0 °) from the diffusion adhesive layer KL of Example 2 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 oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint). Since the light WWn and the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change in oblique visual recognition.
  • the film thickness 50 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.565
  • the refractive index difference between the adhesive and the diffusing particles 0.095
  • the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 5 is a sectional view showing the structure of the mirror display of the third embodiment.
  • the functional layer 40 of Example 3 includes, in order from the lower layer side, a diffusion adhesive layer KL containing an adhesive and spherical diffusion particles, a 1/4 ⁇ plate 43 (first film FF), a transparent adhesive layer CA, and an absorption polarizing plate 46. Equipped with.
  • the front white light (polar angle 0°) from the diffusion adhesive layer KL of Example 3 includes the white light WWs derived from the front white emission light WW (small tint) and the oblique white emission light WB from the panel.
  • White light WBs derived from (large tint) is included, and oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint). Since the light WWn and the white light WBn derived from the oblique white emission light WB (large color tint) from the panel are included, it is possible to suppress the tint change due to oblique visual recognition.
  • the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • the film thickness 50 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.420
  • the refractive index difference between the adhesive and the diffusing particles. 0.050
  • the particle size of the diffusing particles 4.5 ⁇ m
  • FIG. 6 is a sectional view showing the structure of the mirror display of the fourth embodiment.
  • the functional layer 40 of Example 4 is, in order from the lower layer side, a transparent adhesive layer CA, a 1/4 ⁇ plate 43, an absorption polarizing plate 46, a diffusion adhesive layer KL containing an adhesive and spherical diffusion particles, and a transparent film 47 (first). 1 film FF).
  • the front white light (extreme angle 0 °) from the diffusion adhesive layer KL of Example 4 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 oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint). Since the light WWn and the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change in oblique visual recognition.
  • the film thickness 15 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.595
  • the refractive index difference between the adhesive and the diffusing particles 0.125
  • the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 7 is a sectional view showing the structure of the mirror display of the fifth embodiment.
  • the functional layer 40 of Example 5 includes a diffusion adhesive layer KL containing an adhesive and spherical diffusion particles, a 1 ⁇ 4 ⁇ plate 43 (first film FF), and an absorption polarizing plate 46 in order from the lower layer side.
  • the front white light (extreme angle 0 °) from the diffusion adhesive layer KL of Example 5 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 oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint). Since the light WWn and the white light WBn derived from the oblique white emission light WB (large color tint) from the panel are included, it is possible to suppress the tint change due to oblique visual recognition.
  • the film thickness 100 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.595
  • the refractive index difference between the adhesive and the diffusing particles 0.125
  • the diffusion When the particle diameter of the particles is 5.0 ⁇ m and the haze is 94.7%, ⁇ b is 7.4, and it can be seen that the tint change with the polar angle is extremely small (the viewing angle characteristics are particularly excellent).
  • Example 7 the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 8 is a sectional view showing the structure of the mirror display of the sixth embodiment.
  • the functional layer 40 of Example 6 includes, in order from the lower layer side, a transparent adhesive layer CA, a 1/4 ⁇ plate 43, a first diffusion adhesive containing an adhesive (first adhesive) and spherical diffusion particles (first diffusion particles).
  • SF transparent film 47
  • the front white light (polar angle 0°) from the second diffusion adhesive layer KL2 of Example 6 includes white light WWs derived from the front white emission light WW (small tint) and oblique white light from the panel.
  • White light WBs derived from radiated light WB (large tint) are included, and the oblique white light (for example, polar angle 60 °) from the second diffusion adhesive layer KL2 includes front white emitted light WW (small tint) from the panel.
  • the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change due to oblique visual recognition.
  • Example 6 the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 9 is a cross-sectional view showing the configuration of the mirror display of Example 7.
  • the functional layer 40 of Example 7 includes, in order from the lower layer side, a first diffusion adhesive layer KL1 including an adhesive (first adhesive) and spherical diffusion particles (first diffusion particles), a 1 ⁇ 4 ⁇ plate 43 (first A film FF), a second diffusion adhesive layer KL2 containing an adhesive (second adhesive) and spherical diffusion particles (second diffusion particles), and an absorption polarizing plate 46 (second film SF).
  • the front white light (polar angle 0°) from the second diffusion adhesive layer KL2 of Example 7 includes the white light WWs derived from the front white emission light WW (small tint) and the oblique white light from the panel.
  • White light WBs derived from radiated light WB (large tint) are included, and the oblique white light (for example, polar angle 60 °) from the second diffusion adhesive layer KL2 includes front white emitted light WW (small tint) from the panel.
  • the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change due to oblique visual recognition.
  • the film thickness 10 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffuse particles 1.595
  • particle size of diffuse particles 5.0 ⁇ m
  • haze 52.3% (thickness 20 ⁇ m and haze 76.2% when the first and second diffusion adhesive layers KL1 and KL2 are bonded together)
  • ⁇ b 14.5
  • Example 7 the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 10 is a sectional view showing the structure of the mirror display of the eighth embodiment.
  • the functional layer 40 of Example 8 includes a first diffusion adhesive layer KL1 including a pressure-sensitive adhesive (first pressure-sensitive adhesive) and spherical diffusion particles (first diffusion particles) and a 1/4 ⁇ plate 43 (first Film FF), a second diffusion adhesive layer KL2 containing an adhesive (second adhesive) and spherical diffusion particles (second diffusion particles), an absorption polarizing plate 46 (second film SF), an adhesive (third adhesive) ) And spherical diffusion particles (third diffusion particles), and a third diffusion adhesive layer KL3, and a transparent film 47 (third film TF).
  • first diffusion adhesive layer KL1 including a pressure-sensitive adhesive (first pressure-sensitive adhesive) and spherical diffusion particles (first diffusion particles) and a 1/4 ⁇ plate 43 (first Film FF
  • second diffusion adhesive layer KL2 containing an adhesive (second adhesive) and spherical diffusion particles (second diffusion particles), an absorption polarizing plate 46 (
  • the front white light (extreme angle 0 °) from the third diffusion adhesive layer KL3 of Example 8 includes white light WWs derived from the front white emission light WW (small tint) from the panel and oblique white output from the panel.
  • White light WBs derived from radiated light WB (large color) are included, and the oblique white light (for example, polar angle 60 °) from the third diffusion adhesive layer KL3 includes the front white emitted light WW (small color) from the panel.
  • the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change due to oblique visual recognition.
  • the film thickness 50 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.565
  • particle size of diffusing particles 5.0 ⁇ m
  • haze 87.9% (film thickness of 150 ⁇ m and haze when the first to third diffusion adhesive layers KL1, KL2, and KL3 are bonded together)
  • ⁇ b 3.1
  • Example 8 the 1/4 ⁇ plate 43 and the absorption polarization plate 46 function as a circular polarization plate. Therefore, the panel see-through and the double reflection of the image due to the external light WF are eliminated.
  • FIG. 11 is a sectional view showing the structure of the mirror display of the ninth embodiment.
  • the functional layer 40 of Example 9 includes a diffusion adhesive layer KL containing an adhesive and spherical diffusion particles, and a transparent film 47 (first film FF) in this order from the lower layer side.
  • the front white light (extreme angle 0 °) from the diffused adhesive layer KL of Example 9 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 oblique white light (for example, a polar angle of 60°) from the diffusion adhesive layer KL is white derived from front white emitted light WW (small tint). Since the light WWn and the white light WBn derived from the oblique white emitted light WB (large tint) from the panel are included, it is possible to suppress the tint change in oblique visual recognition.
  • the film thickness 30 ⁇ m
  • the refractive index of the adhesive 1.47
  • the refractive index of the diffusing particles 1.595
  • the refractive index difference between the adhesive and the diffusing particles 0.125
  • the diffusion When the particle diameter of the particles is 1.3 ⁇ m and the haze is 92.6%, ⁇ b is 8.6, and it can be seen that the tint change with the polar angle is extremely small (the viewing angle characteristics are particularly excellent).
  • FIG. 15 is a cross-sectional view showing a configuration example of a mirror display.
  • 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 60 side.
  • the half mirror 60 is not limited to a curved surface shape, but may be a planar shape.
  • the change in tint is particularly large, and the configuration of each embodiment suppresses the change in tint.
  • the display panel is an EL display QLED such as an organic EL display, an organic EL (Electro Luminescence) display including an OLED (Organic Light Emitting Diode), or an inorganic EL display including an inorganic light emitting diode.
  • QLED Display with (Quantum dot Light Emitting Diode) The embodiments described above are for purposes of illustration and description, and not for limitation. Based on these examples and explanations, it will be apparent to those skilled in the art that many variants are possible.
  • a display panel, a diffusion adhesive layer, an air layer, and a half mirror are provided in order from the lower layer,
  • the diffusion adhesive layer contains spherical diffusion particles and an adhesive.
  • 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 diffusion particles and the adhesive is 0.07 to 0.25,
  • a mirror display in which the haze of the diffusion adhesive layer is 40 to 99%.
  • the first film is a transparent film
  • the mirror display according to aspect 2 for example, wherein a ⁇ /4 plate and an absorption polarizing plate are provided between the display panel and the diffusion adhesive layer.
  • each diffusing adhesive layer contains spherical diffusing particles and an adhesive.
  • the refractive index of the diffusion particles is 1.42 to 1.70
  • the refractive index of the adhesive is 1.45 to 1.55
  • the difference in refractive index between the diffusion particles and the adhesive is 0.07 to 0.25
  • the haze when the plurality of diffusion adhesive layers are bonded together is 40 to 99%, for example, the mirror display according to the first aspect.
  • the plurality of diffusion adhesive layers are a first diffusion adhesive layer and a second diffusion adhesive layer, From the bottom layer, the display panel, the first diffusion adhesive layer, the first film, the second diffusion adhesive layer, the second film, the air layer, and the half mirror are provided.
  • the first diffusion adhesive layer includes spherical first diffusion particles and a first adhesive
  • the second diffusion adhesive layer includes spherical second diffusion particles and a second adhesive
  • the refractive index of the first diffusing particles is 1.42 to 1.70
  • the refractive index of the first pressure-sensitive adhesive is 1.45 to 1.55.
  • the difference in refractive index between the first diffusing particles and the first pressure-sensitive adhesive is 0.07 to 0.25.
  • the refractive index of the second diffusing particles is 1.42 to 1.70
  • the refractive index of the second pressure-sensitive adhesive is 1.45 to 1.55.
  • the difference in refractive index between the second diffusing particles and the second pressure-sensitive adhesive is 0.07 to 0.25.
  • the mirror display according to aspect 9, for example, wherein the haze when the first diffusion adhesive layer and the second diffusion adhesive layer are bonded together is 40 to 99%.
  • the first film is an absorption polarizing plate
  • the second film is a transparent film
  • the mirror display according to aspect 10 for example, wherein a ⁇ /4 plate is provided between the display panel and the first diffusion adhesive layer.
  • the plurality of diffusion adhesive layers are a first diffusion adhesive layer, a second diffusion adhesive layer and a third diffusion adhesive layer,
  • the display panel the first diffusion adhesive layer, the first film, the second diffusion adhesive layer, the second film, the third diffusion adhesive layer, the third film, the air layer, and the half mirror in order from the lower layer.
  • the first diffusion adhesive layer includes spherical first diffusion particles and a first adhesive
  • the second diffusion adhesive layer includes spherical second diffusion particles and a second adhesive
  • the third diffusion adhesive layer includes spherical third diffusion particles and a third adhesive
  • the refractive index of the first diffusing particles is 1.42 to 1.70
  • the refractive index of the first pressure-sensitive adhesive is 1.45 to 1.55.
  • the refractive index difference between the first diffusion particles and the first adhesive is 0.07 to 0.25
  • the refractive index of the second diffusing particles is 1.42 to 1.70
  • the second adhesive has a refractive index of 1.45 to 1.55,
  • the refractive index difference between the second diffusing particles and the second adhesive is 0.07 to 0.25
  • the refractive index of the third diffusing particles is 1.42 to 1.70
  • the third adhesive has a refractive index of 1.45 to 1.55,
  • the refractive index difference between the third diffusion particles and the third pressure-sensitive adhesive is 0.07 to 0.25
  • the haze when the first diffusion adhesive layer, the second diffusion adhesive layer, and the third diffusion adhesive layer are bonded together is 40 to 99%, for example, the mirror display according to the ninth aspect.
  • 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.

Landscapes

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

Abstract

La présente invention comprend, à partir d'une couche inférieure dans l'ordre donné, un panneau d'affichage (30), une couche de diffusion adhésive sensible à la pression (KL), un premier film (FF), une couche d'air (50), et un miroir semi-argenté (60). La couche de diffusion adhésive sensible à la pression comprend des particules de diffusion sphériques et un adhésif sensible à la pression. L'indice de réfraction des particules de diffusion est de 1,42-1,70. L'indice de réfraction de l'adhésif sensible à la pression est de 1,45-1,55. La différence d'indice de réfraction entre les particules de diffusion et l'adhésif sensible à la pression est de 0,07-0,25. La valeur de trouble de la couche de diffusion adhésive sensible à la pression est de 40-99 %.
PCT/JP2019/008206 2019-03-01 2019-03-01 Affichage à miroir WO2020178921A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/008206 WO2020178921A1 (fr) 2019-03-01 2019-03-01 Affichage à miroir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/008206 WO2020178921A1 (fr) 2019-03-01 2019-03-01 Affichage à miroir

Publications (1)

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WO2020178921A1 true WO2020178921A1 (fr) 2020-09-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004191450A (ja) * 2002-12-09 2004-07-08 Sumitomo Chem Co Ltd 自発光型表示装置
JP2014010291A (ja) * 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP2015207377A (ja) * 2014-04-17 2015-11-19 日東電工株式会社 有機エレクトロルミネセンス表示装置
WO2017175581A1 (fr) * 2016-04-07 2017-10-12 日本化薬株式会社 Film réfléchissant la lumière, et film de commande de lumière et dispositif d'affichage à miroir l'utilisant
WO2018008497A1 (fr) * 2016-07-06 2018-01-11 シャープ株式会社 Dispositif d'affichage et appareil électronique
WO2018008498A1 (fr) * 2016-07-06 2018-01-11 シャープ株式会社 Dispositif d'affichage, appareil électronique, plaque de réflexion semi-rétroéclairée et appareil électrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004191450A (ja) * 2002-12-09 2004-07-08 Sumitomo Chem Co Ltd 自発光型表示装置
JP2014010291A (ja) * 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP2015207377A (ja) * 2014-04-17 2015-11-19 日東電工株式会社 有機エレクトロルミネセンス表示装置
WO2017175581A1 (fr) * 2016-04-07 2017-10-12 日本化薬株式会社 Film réfléchissant la lumière, et film de commande de lumière et dispositif d'affichage à miroir l'utilisant
WO2018008497A1 (fr) * 2016-07-06 2018-01-11 シャープ株式会社 Dispositif d'affichage et appareil électronique
WO2018008498A1 (fr) * 2016-07-06 2018-01-11 シャープ株式会社 Dispositif d'affichage, appareil électronique, plaque de réflexion semi-rétroéclairée et appareil électrique

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