WO2021220842A1 - Dispositif d'affichage et feuille de réglage optique - Google Patents

Dispositif d'affichage et feuille de réglage optique Download PDF

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Publication number
WO2021220842A1
WO2021220842A1 PCT/JP2021/015670 JP2021015670W WO2021220842A1 WO 2021220842 A1 WO2021220842 A1 WO 2021220842A1 JP 2021015670 W JP2021015670 W JP 2021015670W WO 2021220842 A1 WO2021220842 A1 WO 2021220842A1
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WIPO (PCT)
Prior art keywords
light
peak wavelength
emission peak
optical adjustment
reflection
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PCT/JP2021/015670
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English (en)
Japanese (ja)
Inventor
博紀 秋山
和幸 山江
英樹 和田
亮祐 鴫谷
琴音 森
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2021220842A1 publication Critical patent/WO2021220842A1/fr

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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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/878—Arrangements for extracting light from the devices comprising reflective means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/26—Reflecting filters
    • 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 and an optical adjustment sheet.
  • IOT Internet of Things
  • display devices such as monitors, tablet terminals, and televisions connected to personal computers are increasing in houses and public facilities.
  • the display device when the display device is turned off, the display surface portion of the display device is black. Therefore, the display device does not fit into the interior or exterior of the house or public facility in which the display device is installed, and deteriorates the design of the space such as the house or public facility.
  • Patent Document 1 discloses a display device including a display surface portion and a half mirror covering the display surface portion.
  • this display device it is not noticeable that the display surface portion is black because the half mirror covers the display surface portion. Therefore, it is expected that the deterioration of the design of the space will be suppressed.
  • a decoration with low translucency for example, a sticker or a sticker
  • the display surface portion which is black.
  • the display surface portion is shielded by the decoration, which has an effect such that the visibility of the image displayed on the display surface portion is lowered.
  • the present invention provides a display device or the like that has little influence on the displayed image when it is turned on and can enhance the design of the space when it is turned off.
  • the display device is a display device illuminated by the first light emitted by the first light source, and is provided so as to cover the display surface portion that emits the second light for displaying an image and the display surface portion. It has a first surface on which the first light is incident and a second surface on which the second light is incident, facing back to the first surface, and is located in a predetermined wavelength region of the first light and the second light.
  • An optical adjustment sheet that reflects light is provided, and the second light has a plurality of emission peak wavelengths, and in the reflection spectrum of the optical adjustment sheet, the reflection peak wavelengths are adjacent to each other among the plurality of emission peak wavelengths.
  • the first condition is a condition that is located between the two emission peak wavelengths and the reflection peak half-price width is equal to or less than the difference between the two adjacent emission peak wavelengths, and the reflection peak wavelength is among the plurality of emission peak wavelengths.
  • the second condition is a condition that is located between the shortest emission peak wavelength and 380 nm and the half-value width of the reflection peak is equal to or less than the difference between the shortest emission peak wavelength and 380 nm.
  • the reflection The spectrum satisfies at least one of the first condition, the second condition and the third condition.
  • the optical adjustment sheet is an optical adjustment sheet, which is provided with a first surface on which the first light emitted by the first light source is incident and a display device facing the first surface.
  • a second surface on which the second light emitted by the second light source is incident is provided so as to cover the display surface portion included in the display device, and the light in a predetermined wavelength region of the first light and the second light is provided.
  • the second light is light for displaying a moving image on the display surface portion, has a plurality of emission peak wavelengths when incident on the second surface, and has a reflection spectrum of the optical adjustment sheet.
  • the condition is that the reflected peak wavelength is located between two adjacent emission peak wavelengths among the plurality of emission peak wavelengths, and the half-value width of the reflection peak is equal to or less than the difference between the two adjacent emission peak wavelengths.
  • the reflection peak wavelength is located between the shortest emission peak wavelength of the plurality of emission peak wavelengths and 380 nm, and the reflection peak half-value width is equal to or less than the difference between the shortest emission peak wavelength and 380 nm.
  • a certain condition is set as the second condition, the reflection peak wavelength is located between the longest emission peak wavelength of the plurality of emission peak wavelengths and 780 nm, and the reflection peak half-value width is 780 nm with the longest emission peak wavelength.
  • the condition equal to or less than the difference between the above is set as the third condition, the reflection spectrum satisfies at least one of the first condition, the second condition, and the third condition.
  • the present invention it is possible to provide a display device or the like that has little influence on the displayed image when it is turned on and can enhance the design of the space when it is turned off.
  • FIG. 1 is a perspective view showing a usage example of the display device according to the first embodiment.
  • FIG. 2 is an exploded perspective view showing the configuration of the display device according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the optical adjustment sheet according to the first embodiment.
  • FIG. 4 is a diagram showing an emission spectrum of the second light according to the first embodiment.
  • FIG. 5 is a diagram showing a reflection spectrum of the optical adjustment sheet according to the first embodiment.
  • FIG. 6 is a schematic diagram illustrating the behavior of the first light and the second light according to the first embodiment.
  • FIG. 7 is a diagram showing an emission spectrum of the second light for explaining another example of the reflected peak wavelength and the reflected peak half width according to the first embodiment.
  • FIG. 1 is a perspective view showing a usage example of the display device according to the first embodiment.
  • FIG. 2 is an exploded perspective view showing the configuration of the display device according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the optical adjustment sheet
  • FIG. 8 is an exploded perspective view showing the configuration of the display device according to the second embodiment.
  • FIG. 9 is an exploded perspective view showing the configuration of the display device according to the first modification of the second embodiment.
  • FIG. 10 is an xy chromaticity diagram showing the reflected peak wavelength and the reflected peak wavelength according to the first modification of the second embodiment.
  • FIG. 11 is an exploded perspective view showing the configuration of the display device according to the second modification of the second embodiment.
  • FIG. 12 is a schematic u'v'chromaticity diagram of the second light according to the modified example 2 and the comparative example of the second embodiment.
  • FIG. 13 is a schematic view showing the configuration of the display device and the projection device according to the third embodiment.
  • each figure is a schematic diagram and is not necessarily exactly illustrated. Further, in each figure, substantially the same configuration may be designated by the same reference numerals, and duplicate description may be omitted or simplified.
  • FIG. 1 is a perspective view showing a usage example of the display devices 1, 101 and 201 according to the present embodiment.
  • the display devices 1, 101 and 201 are liquid crystal monitors used in a space such as a house, for example.
  • the display device 1 displays an image on a user U in a space such as a house as a television (here, an LCD television), the display device 101 is a tablet terminal, and the display device 201 is a monitor provided on an interphone. be.
  • the display devices 1, 101 and 201 are not limited to the above, and are, for example, a monitor connected to a personal computer, a smartphone terminal, and the like.
  • the display devices 1, 101 and 201 may be devices used in a space such as a public facility or a commercial facility. Display devices 1, 101 and 201 may be used for advertising as digital signage. Further, the display devices 1, 101 and 201 are used indoors as shown in FIG. 1, but the present invention is not limited to this, and the display devices 1, 101 and 201 may be used outdoors.
  • the display devices 1, 101 and 201 are illuminated by the first light L10 emitted by the first light source 300 provided outside the display devices 1, 101 and 201.
  • the first light source 300 is a light source included in a lighting fixture located in the space where the display devices 1, 101 and 201 are installed.
  • the first light L10 may be light of any color as long as it illuminates the space, but here, it is white light.
  • the first light L10 is not limited to this, and may be light bulb-colored light.
  • the first light source 300 may be, for example, the sun.
  • the first light L10 is sunlight shining through a window or the like.
  • the display device 1 will be described as a typical example.
  • FIG. 2 is an exploded perspective view showing the configuration of the display device 1 according to the present embodiment.
  • the display device 1 includes a display surface portion 2 and an optical adjustment sheet 10.
  • the display surface portion 2 is a liquid crystal panel.
  • the display surface portion 2 emits a second light L20 for displaying an image. That is, the second light L20 is light emitted from a plurality of pixels of the display surface portion 2. As a result, an image including a still image and a moving image is displayed on the display surface unit 2 (more specifically, on the display surface of the display surface unit 2). Further, the second light L20 is light derived from the light emitted by the second light source of the display surface portion 2.
  • the second light source (not shown) is a light source provided in the display device 1.
  • the second light source is, for example, an LED module having a light emitting diode (LED; Light Emitting Diode).
  • the second light source is not limited to the above as long as it can emit visible light.
  • the second light source can emit white light as an example. More specifically, the second light source includes a blue LED that emits blue light and a sealing member containing a phosphor.
  • the phosphor includes a green phosphor and a red phosphor that fluoresce using the blue light emitted by the blue LED as excitation light.
  • the green phosphor and the red phosphor absorb a part of the blue light emitted by the blue LED and are excited to emit green light and red light, which are absorbed by the green light and red light and the green phosphor and the red phosphor. It becomes white light by mixing with the blue light that was not there.
  • the fluorophore may include a yellow fluorophore that emits yellow light.
  • the second light source is the white backlight of the display device 1 which is a liquid crystal monitor.
  • the second light source is used in the display device 1 by an edge type or a direct type backlight type.
  • the second light source has a COB (Chip On Board) structure or a surface mount (SMD: Surface Mount Device) structure
  • the second light source has an SMD structure. Not limited to this.
  • the white light emitted by the second light source is converted into the second light L20 including blue light, green light and red light by passing through the color filter included in the display device 1, and the blue light contained in the second light L20, for example.
  • the image is displayed on the display surface portion 2.
  • the blue light, green light, and red light are emitted from, for example, a plurality of sub-pixels included in the plurality of pixels.
  • the second light L20 including blue light, green light, and red light is incident on the optical adjustment sheet 10 provided so as to cover the display surface portion 2.
  • the optical adjustment sheet 10 has a first surface 11 and a second surface 12 that faces the first surface 11.
  • the first light L10 is incident on the first surface 11, and the second light L20 is incident on the second surface 12.
  • the optical adjustment sheet 10 reflects light in a predetermined wavelength region of the first light L10 and the second light L20.
  • the optical adjustment sheet 10 is a sheet-shaped optical member.
  • the optical adjustment sheet 10 may be a rigid seat member having no flexibility, or a flexible seat member having flexibility.
  • the optical adjustment sheet 10 has a rectangular shape in a plan view.
  • the optical adjustment sheet 10 is provided so as to cover the entire surface of the display surface portion 2 (more specifically, the entire surface of the display surface of the display surface portion 2). Therefore, to the user U, it seems that the color presented by the optical adjustment sheet 10 is the color presented by the display surface portion 2.
  • the optical adjustment sheet 10 is not limited to the above, and may be provided so as to cover a part of the display surface portion 2.
  • optical adjustment sheet 10 will be described in more detail with reference to FIG.
  • FIG. 3 is a cross-sectional view of the optical adjustment sheet 10 according to the present embodiment.
  • the optical adjustment sheet 10 has a base material 20 and a colloidal crystal film 30.
  • the base material 20 is an optical member having translucency at least in the visible light region. That is, the base material 20 has a light property of transmitting visible light.
  • the transmittance of the base material 20 is preferably high, and is preferably at least 50% or more.
  • the base material 20 is preferably transparent to visible light.
  • the transparent base material 20 has a high transmittance so that the other side can be seen through. In this case, the transmittance of the transparent base material 20 with respect to visible light is 70% or more, better if it is 80% or more, and even better if it is 90% or more.
  • the base material 20 is made of a translucent material.
  • the base material 20 is a transparent substrate that is transparent to visible light, such as a transparent resin substrate made of a transparent resin material or a glass substrate made of a transparent glass material.
  • a transparent resin substrate made of an acrylic resin or a polycarbonate substrate made of a polycarbonate resin can be used.
  • the transparent resin substrate may be a rigid substrate having no flexibility or a flexible substrate having flexibility. In this embodiment, a rigid and transparent acrylic substrate is used as the base material 20.
  • the plan view shape of the base material 20 is rectangular like the optical adjustment sheet 10.
  • the thickness of the base material 20 is, for example, several mm or more and several cm or less, but is not limited to this.
  • the base material 20 functions as a substrate that supports the colloidal crystal film 30 included in the optical adjustment sheet 10.
  • the colloidal crystal film 30 is provided on one main surface of the base material 20. Specifically, the colloidal crystal film 30 is formed on the entire surface of one main surface of the base material 20 so as to be in contact with one main surface.
  • the thickness of the colloidal crystal film 30 is uniform throughout the colloidal crystal film 30. That is, the thickness of the colloidal crystal film 30 is constant.
  • the thickness of the colloidal crystal film 30 is preferably 5 ⁇ m or more and 100 ⁇ m or less, but is not limited to this.
  • the colloidal crystal film 30 has a three-dimensional periodic structure which is a three-dimensional periodic structure.
  • the colloidal crystal film 30 is composed of a plurality of nanoparticles 32 and a parent resin 31 that holds the plurality of nanoparticles 32.
  • the plurality of nanoparticles 32 (colloidal particles) are three-dimensionally and periodically and regularly arranged, and exist as colloidal crystals in the parent resin 31.
  • the plurality of nanoparticles 32 are periodically and regularly arranged in the three axial directions of the thickness direction of the base material 20 and the biaxial direction (horizontal direction) parallel to one main surface of the base material 20. It is a colloidal crystal.
  • the plurality of nanoparticles 32 are uniformly arranged throughout the colloidal crystal film 30.
  • Nanoparticle 32 is a particle having a particle size of submicron order size.
  • the particle sizes of the nanoparticles 32 contained in the colloidal crystal film 30 are basically the same, but may vary slightly. Although the details will be described later, the wavelength region of the light reflected by the optical adjustment sheet 10 having the colloidal crystal film 30 by adjusting the average particle size and / or the concentration of 12a of the plurality of nanoparticles contained in the colloidal crystal film 30. Can be changed.
  • the plurality of nanoparticles 32 are, for example, translucent particles that transmit light.
  • the nanoparticles 32 which are translucent particles for example, inorganic particles such as silica particles made of SiO 2 may be used, or polymer particles such as polystyrene particles or acrylic particles may be used. In this embodiment, silica particles are used as nanoparticles 32.
  • the base resin 31 is a binder that fixes a plurality of nanoparticles 32.
  • the base resin 31 is made of a translucent resin material.
  • the base resin 31 is made of a resin material that is transparent to visible light.
  • the base resin 31 may contain at least one selected from the group consisting of, for example, an acrylic resin, a polycarbonate resin, a cycloolefin resin, an epoxy resin, a silicone resin, a styrene resin, and the like.
  • the colloidal crystal film 30 can be produced, for example, as follows.
  • silica particles are added to a monomer made of triethylene glycol dimethacrylate (for example, "NK ester 3G” manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) so that the content is 40%.
  • ultrasonic dispersion treatment was performed to disperse the silica particles in the monomer so as to be regularly arranged in three dimensions. In this way, a dispersion liquid in which the silica particles are uniformly dispersed in the monomer as colloidal particles is obtained.
  • a photopolymerization initiator for example, IRGACURE-1173 manufactured by IGM Resins BV
  • this dispersion is applied to the base material 20 using a bar coater to form a coating film.
  • a bar coater having a count of # 10.
  • the colloidal crystal film 30 can be produced on the surface of the base material 20 by irradiating the obtained coating film with ultraviolet light to polymerize the monomers.
  • the colloidal crystal film 30 thus produced has a different color when viewed in a plan view depending on the particle size of the plurality of nanoparticles 32 constituting the colloidal crystal.
  • the colloidal crystal film 30 produced by the above method using silica particles having an average particle diameter of 180 nm as nanoparticles 32 has a yellow color in a plan view.
  • the colloidal crystal film 30 produced by the above method using silica particles having an average particle diameter of 200 nm as nanoparticles 32 has a red color in a plan view.
  • silica particles having an average particle diameter of 180 nm are used.
  • the optical adjustment sheet 10 may include, for example, a dielectric multilayer film instead of the colloidal crystal film 30.
  • the dielectric multilayer film has a structure in which a plurality of dielectric materials having different dielectric constants are laminated.
  • the dielectric multilayer film has a structure in which a dielectric film having a low refractive index and a dielectric film having a high refractive index are alternately laminated.
  • the light reflected at the interface between the dielectric film having a low refractive index and the dielectric film having a high refractive index matches the phase of the light reciprocating in the dielectric multilayer film, and each light is matched.
  • a film having a high refractive index with respect to light in a predetermined wavelength region is obtained. More specifically, a reflection spectrum having a narrow bandwidth reflection peak is realized.
  • the base material 20 is in contact with the display surface portion 2 (more specifically, the display surface of the display surface portion 2), but the present invention is not limited to this, and the colloidal crystal film 30 is in contact with the display surface portion 2.
  • an adhesive layer may be provided between the optical adjustment sheet 10 and the display surface portion 2, but in the present embodiment, the adhesive layer is not provided.
  • the adhesive layer is preferably a light-transmitting layer.
  • the transmittance of the adhesive layer is preferably high, and is preferably at least 50% or more. Specifically, the transmittance of the adhesive layer with respect to visible light is 70% or more, better if it is 80% or more, and even better if it is 90% or more.
  • FIG. 4 is a diagram showing an emission spectrum of the second light L20 according to the present embodiment. More specifically, FIG. 4 is a diagram showing the emission spectra of blue light, green light, and red light emitted from a plurality of subpixels, which is the light contained in the second light L20.
  • the emission spectra of blue light, green light, and red light are described by solid lines, broken lines, and alternate long and short dash lines, respectively.
  • each emission spectrum is standardized by the intensity of the peak wavelength of blue light.
  • the second light L20 has a plurality of emission peak wavelengths including the first emission peak wavelength ⁇ 1, the second emission peak wavelength ⁇ 2, and the third emission peak wavelength ⁇ 3 in the visible light region.
  • the first, second, and third emission peak wavelengths ⁇ 1, ⁇ 2, and ⁇ 3 in FIG. 4 correspond to the peak wavelengths of the emission spectra of blue light, green light, and red light emitted from the plurality of subpixels.
  • the second emission peak wavelength ⁇ 2 is adjacent to the first emission peak wavelength ⁇ 1 and is longer than the first emission peak wavelength ⁇ 1.
  • the third emission peak wavelength ⁇ 3 is adjacent to the second emission peak wavelength ⁇ 2 and is longer than the second emission peak wavelength ⁇ 2.
  • FIG. 5 is a diagram showing a reflection spectrum of the optical adjustment sheet 10 according to the present embodiment.
  • the reflection spectrum shown in FIG. 5 was measured by measuring the reflection spectrum with an incident angle of 5 °.
  • the reflection spectrum was measured with the measurement option ARMV-734 using a spectrophotometer (V-650) manufactured by JASCO Corporation.
  • the optical adjustment sheet 10 including the colloidal crystal film 30 has a reflection wavelength selectivity in which the wavelength of the reflected light depends on the incident angle of the incident light.
  • the reflection peak wavelength ⁇ r is about 570 nm. It is considered that the reflection peak wavelength ⁇ r at the specular reflection wavelength (incident angle is 0 °) of the optical adjustment sheet 10 exists in the range of 570 nm or more and 580 nm or less.
  • the half-value width at half maximum of the reflection peak is about 20 nm.
  • the half-value width at half maximum of the reflection peak is the width of the wavelength at which the reflectance at the reflection peak wavelength ⁇ r corrected at the baseline of the reflection spectrum becomes 50%.
  • the reflection peak is the peak having the highest reflectance
  • the reflection peak wavelength ⁇ r is the wavelength at which the transmittance is maximum.
  • the reflection spectrum of one optical adjustment sheet 10 has one reflection peak.
  • the reflection peak wavelength ⁇ r and the reflection peak half width w satisfy the following first conditions.
  • the first condition is that the reflection peak wavelength ⁇ r is located between two adjacent emission peak wavelengths among the plurality of emission peak wavelengths, and the reflection peak half width w is equal to or less than the difference between the two adjacent emission peak wavelengths. It is a certain condition. Specifically, as shown in FIG. 5, the reflected peak wavelength ⁇ r is the two adjacent peak wavelengths (the second emission peak wavelength ⁇ 2 corresponding to green light and the third emission peak wavelength ⁇ 3 corresponding to red light). It is located between. Further, the full width at half maximum of the reflected peak is equal to or less than the difference between the second emission peak wavelength ⁇ 2 corresponding to green light and the third emission peak wavelength ⁇ 3 corresponding to red light.
  • the reflectance at the reflection peak wavelength ⁇ r is about 38%, but the reflectance is not limited to this, and may be 20% or more and 60% or less.
  • the reflectance at the reflection peak wavelength ⁇ r is better if it is 25% or more and 55% or less, and even better if it is 30% or more and 50% or less.
  • the optical adjustment sheet 10 includes the colloidal crystal film 30. Therefore, a reflection spectrum having a narrow bandwidth reflection peak is realized. Further, by adjusting the average particle diameter and / or concentration of 12a of the plurality of nanoparticles, the wavelength region of the light reflected by the optical adjustment sheet 10 having the colloidal crystal film 30 can be changed. Further, since the base material 20, the plurality of nanoparticles 32, and the base resin 31 all have translucency, the optical adjustment sheet 10 also has translucency in the visible light region, and light absorption is unlikely to occur.
  • FIG. 6 is a schematic diagram illustrating the behavior of the first light L10 and the second light L20 according to the present embodiment.
  • the first light L10 is incident on the first surface 11 and the second light L20 is incident on the second surface 12. Further, the optical adjustment sheet 10 reflects light in a predetermined wavelength region of the first light L10 and the second light L20. In other words, of the first light L10 and the second light L20, light other than the light in the predetermined wavelength region passes through the optical adjustment sheet 10.
  • the first light L10 and the second light L20 reflected by the optical adjustment sheet 10 are the first reflected light L11 and the second reflected light L21, and the first light L10 and the second light L20 transmitted through the optical adjustment sheet 10 are the first.
  • the first reflected light L11 and the second transmitted light L22 are light emitted toward the space where the display device 1 is installed and the user U, and the first transmitted light L12 and the second reflected light L21 are displayed. It is the light emitted toward the surface portion 2.
  • the influence of the first light L10 and the second light L20 on the user U will be described.
  • the color presented by the optical adjustment sheet 10 appears to the user U as if it is the color presented by the display surface portion 2.
  • the color exhibited by the optical adjustment sheet 10 is mainly the first reflection. It is the color of light L11.
  • the first light L10 is white light and the reflection spectrum of the optical adjustment sheet 10 satisfies the first condition, the first reflected light L11 is colored light in the visible light region. .. More specifically, since the reflected peak wavelength ⁇ r is 570 nm or more and 580 nm or less, the first reflected light L11 is yellow light.
  • the color presented by the display surface portion 2 is visually recognized as a colored color (for example, yellow) other than the conventional black color, and the display device 1 is easily adapted to the interior or exterior of the space. Therefore, the display device 1 can enhance the design of the space.
  • the display device 1 when the display device 1 is lit, that is, when the display surface portion 2 emits the second light L20 (hereinafter, referred to as lit), the color exhibited by the optical adjustment sheet 10 is mainly the second. This is the color of the transmitted light L22.
  • the reflection spectrum of the optical adjustment sheet 10 satisfies the first condition. Therefore, the optical adjustment sheet 10 does not easily reflect the light having the second emission peak wavelength ⁇ 2 and the third emission peak wavelength ⁇ 3 having high emission intensity, so that the amount of the second reflected light L21 is small, that is, the second transmitted light L22. There is a lot of light. That is, since the second light L20 for displaying the image on the display surface portion 2 is hard to be shielded by the optical adjustment sheet 10 (because it is hard to be reflected), the visibility of the image is hard to be deteriorated. Therefore, in the display device 1, the influence on the displayed image is small.
  • a display device 1 that has little effect on the displayed image when it is lit and can enhance the design of the space when it is extinguished is realized.
  • the colloidal crystal film 30 is used to realize a reflection spectrum having a narrow bandwidth reflection peak. Therefore, since the amount of light of the second transmitted light L22 can be increased, the visibility of the image is less likely to be lowered.
  • the optical adjustment sheet 10 may include, for example, a dielectric multilayer film instead of the colloidal crystal film 30. Also in this case, a reflection spectrum having a narrow bandwidth reflection peak is realized. Therefore, since the amount of light of the second transmitted light L22 can be increased, the visibility of the image is less likely to be lowered.
  • the reflection peak wavelength ⁇ r and the reflection peak full width at half maximum w in the reflection spectrum of the optical adjustment sheet 10 are not limited to the above.
  • the reflection peak wavelength ⁇ r is located between the shortest emission peak wavelength of the plurality of emission peak wavelengths and 380 nm, and the reflection peak half width w is less than or equal to the difference between the shortest emission peak wavelength and 380 nm. It may be good (hereinafter referred to as the second condition).
  • the reflection peak wavelength ⁇ r may be located between the first emission peak wavelength ⁇ 1 and 380 nm, and may be equal to or less than the difference between the first emission peak wavelength ⁇ 1 and 380 nm.
  • the reflection peak wavelength ⁇ r is located between the longest emission peak wavelength of the plurality of emission peak wavelengths and 780 nm, and the reflection peak half width w is less than or equal to the difference between the longest emission peak wavelength and 780 nm. It may be (hereinafter referred to as the third condition). As an example, the reflection peak wavelength ⁇ r may be located between the third emission peak wavelength ⁇ 3 and 780 nm, and the reflection peak full width at half maximum w may be equal to or less than the difference between the third emission peak wavelength ⁇ 3 and 780 nm.
  • the reflection spectrum of the optical adjustment sheet 10 satisfies at least one of the first condition, the second condition and the third condition.
  • the reflection peak of the optical adjustment sheet 10 is designed so as to be less overlapped with each of the blue light, the green light, and the red light emitted from the sub-pixels on the display surface portion 2.
  • the color presented by the display surface portion 2 is visually recognized as a color other than the conventional black color, and the display device 1 is easily adapted to the interior or exterior of the space.
  • the second light L20 for displaying the image on the display surface portion 2 is hard to be shielded by the optical adjustment sheet 10, the visibility of the image is hard to be deteriorated. That is, the display device 1 is realized, which has little influence on the displayed image when it is lit and can enhance the design of the space when it is extinguished.
  • the reflection peak wavelength ⁇ r and the reflection peak full width at half maximum w in the reflection spectrum of the optical adjustment sheet 10 may be as follows.
  • FIG. 7 is a diagram showing an emission spectrum of the second light L20 for explaining another example of the reflection peak wavelength ⁇ r and the reflection peak half width w according to the present embodiment.
  • the first and second emission peak wavelengths ⁇ 1 and ⁇ 2 corresponding to the peak wavelengths of the emission spectra of blue light and green light will be described. Further, also in the second and third emission peak wavelengths ⁇ 2 and ⁇ 3, the reflection peak wavelength ⁇ r and the reflection peak full width at half maximum w may be determined by using the same conditions.
  • X be the difference between the first emission peak wavelength ⁇ 1 and the second emission peak wavelength ⁇ 2
  • ⁇ m be an intermediate wavelength between the first emission peak wavelength ⁇ 1 and the second emission peak wavelength ⁇ 2. That is, ⁇ m is a value obtained by adding the first emission peak wavelength ⁇ 1 and the second emission peak wavelength ⁇ 2 and dividing by two.
  • the reflection peak wavelength ⁇ r may satisfy the following equation (1)
  • the reflection peak full width at half maximum w may satisfy the following equation (2).
  • a and b are real numbers, and a may be 0.9 or less, better if it is 0.6 or less, and even better if it is 0.3 or less. Further, b may be 0.1 or more and 0.9 or less, 0.2 or more and 0.8 or less, and 0.3 or more and 0.7 or less.
  • the larger b is, the easier it is to manufacture the optical adjustment sheet 10.
  • the optical adjustment sheet 10 includes the colloidal crystal film 30, it becomes easy to allow the periodic arrangement of the plurality of nanoparticles 32 to be disturbed.
  • the display device 1 is easily adapted to the interior or exterior of the space, the visibility of the image is not easily deteriorated, and the manufacturing is easy.
  • the second light source has a light emitting diode, but is not limited to this, and may have a light emitter, a cold cathode tube, a light emitting diode, or a laser diode using cathodoluminescence or plasma discharge.
  • the influence on the displayed image is small when the light is turned on, and the design of the space can be improved when the light is turned off.
  • FIG. 8 is an exploded perspective view showing the configuration of the display device 1a according to the present embodiment.
  • the second embodiment is different from the first embodiment in that a plurality of optical adjustment sheets are provided.
  • the display device 1a has the same configuration as the display device 1 according to the first embodiment, except that the display device 1a includes the first optical adjustment sheet 10a and the second optical adjustment sheet 10b as a plurality of optical adjustment sheets. Be prepared.
  • the first optical adjustment sheet 10a has the same configuration as the optical adjustment sheet 10 according to the first embodiment.
  • the second optical adjustment sheet 10b has the same configuration as the optical adjustment sheet 10 according to the first embodiment, except that the average particle diameter of the nanoparticles 32 contained in the colloidal crystal film 30 in the second optical adjustment sheet 10b is different.
  • the reflection peak wavelength of the reflection spectrum of the first optical adjustment sheet 10a and the reflection peak wavelength of the reflection spectrum of the second optical adjustment sheet 10b are different.
  • the particle size of the nanoparticles 32 is 160 nm in the colloidal crystal film 30 included in the second optical adjustment sheet 10b.
  • the reflection peak wavelength of the reflection spectrum of the second optical adjustment sheet 10b is 475 nm or more and 485 nm or less.
  • the reflection peak wavelength is located between the second emission peak wavelength and the third emission peak wavelength
  • the half width of the reflection peak is the second emission peak wavelength and the third emission peak wavelength. Is less than or equal to the difference of.
  • the reflection peak wavelength is located between the first emission peak wavelength and the second emission peak wavelength
  • the half width of the reflection peak is the first emission peak wavelength and the second emission peak. It is less than or equal to the difference from the wavelength.
  • the light corresponding to the first reflected light L11 of the first embodiment is described as the first reflected light L11a and 11b.
  • the first light L10 reflected by the first optical adjustment sheet 10a is the first reflected light L11a
  • the first light L10 reflected by the second optical adjustment sheet 10b is the first reflected light L11b.
  • the first and second optical adjustment sheets 10a and 10b) are arranged so as not to overlap in a plan view.
  • the first optical adjustment sheet 10a is provided so as to cover a part of the display surface portion 2
  • the second optical adjustment sheet 10b is provided so as to cover the other portion of the display surface portion 2. That is, in the present embodiment, for the user U, the color exhibited by the first optical adjustment sheet 10a is the color exhibited by a part of the display surface portion 2, and the color exhibited by the second optical adjustment sheet 10b is the color exhibited by the display surface portion 2. It looks as if it is the color exhibited by other parts.
  • the color exhibited by the first optical adjustment sheet 10a when the light is turned off is mainly the color of the first reflected light L11a. More specifically, the first reflected light L11a is yellow light as in the first embodiment.
  • the color exhibited by the second optical adjustment sheet 10b is mainly the color of the first reflected light L11b. More specifically, since the reflection peak wavelength of the reflection spectrum of the second optical adjustment sheet 10b is 475 nm or more and 485 nm or less, the first reflected light L11b is blue light.
  • the colors presented by the display surface portion 2 appear to the user U as if they are more diverse colors. Therefore, since the display device 1a is more familiar to the interior or exterior of the space, the display device 1a can further enhance the design of the space.
  • the display device 1a is more familiar to the interior or exterior of the space.
  • FIG. 9 is an exploded perspective view showing the configuration of the display device 1b according to the first modification of the present embodiment.
  • the first modification of the second embodiment is different from the second embodiment in that a plurality of optical adjustment sheets are laminated.
  • the display device 1b has the same configuration as the display device 1a according to the second embodiment, but as shown in FIG. 9, in the present embodiment, a plurality of optical adjustment sheets (first and first) 2
  • the optical adjustment sheets 10a and 10b) are laminated.
  • the second optical adjustment sheet 10b is provided so as to cover the entire surface of the display surface portion 2, and the first optical adjustment sheet 10a is provided so as to cover the entire surface of the second optical adjustment sheet 10b. That is, in the present modification, to the user U, it seems that the color exhibited by the first optical adjustment sheet 10a and the second optical adjustment sheet 10b is the color exhibited by the display surface portion 2.
  • the colors exhibited by the first optical adjustment sheet 10a and the second optical adjustment sheet 10b are mainly colors in which the first reflected light L11a (yellow light) and the first reflected light L11b (blue light) are combined. Is.
  • the second optical adjustment sheet 10b is arranged on the display surface portion 2 side of the first optical adjustment sheet 10a, but the present invention is not limited to this, and the first optical adjustment sheet 10a is located on the display surface portion of the second optical adjustment sheet 10b. It may be arranged on two sides.
  • the colors exhibited by the first optical adjustment sheet 10a and the second optical adjustment sheet 10b will be described in more detail. Further, the reflection peak wavelength of the reflection spectrum of the first optical adjustment sheet 10a is ⁇ r1, and the reflection peak wavelength of the reflection spectrum of the second optical adjustment sheet 10b is ⁇ r2.
  • FIG. 10 is an xy chromaticity diagram showing the reflected peak wavelength ⁇ r1 and the reflected peak wavelength ⁇ r2 according to the first modification of the present embodiment.
  • the region A shown in the xy chromaticity diagram indicates a white region.
  • the first reflected light L11a is yellow light corresponding to the reflected peak wavelength ⁇ r1 (570 nm or more and 580 nm or less), and the first reflected light L11b is blue corresponding to the reflected peak wavelength ⁇ r2 (475 nm or more and 485 nm or less). It is light.
  • the colors of the two lights are approximately in the positional relationship of complementary colors. Therefore, when the light is turned off, the colors exhibited by the first optical adjustment sheet 10a and the second optical adjustment sheet 10b can be within the range of the region A, that is, within the range of white light.
  • the color presented by the display surface portion 2 is not the conventional black color, but is visually recognized as a composite color (for example, white) of the first reflected light L11a and the first reflected light L11b, and the display device 1 is a space. Easy to get used to the interior or exterior of. Further, as compared with the case where one optical adjustment sheet 10 as shown in the first embodiment is provided, the degree of freedom in designing the color presented by the display surface portion 2 is improved. Therefore, the display device 1b can enhance the design of the space.
  • FIG. 11 is an exploded perspective view showing the configuration of the display device 1c according to the second modification of the present embodiment.
  • the modification of the second embodiment, except that the display device 1c according to the present modification includes four optical adjustment sheets including the first, second, third, and fourth optical adjustment sheets 10a, 10b, 10c, and 10d. It has the same configuration as the display device 1b according to Example 2.
  • the four optical adjustment sheets are laminated in the order of the first, second, third, and fourth optical adjustment sheets.
  • the fourth optical adjustment sheet 10d is provided so as to cover the entire surface of the display surface portion 2
  • the third optical adjustment sheet 10c is provided so as to cover the entire surface of the fourth optical adjustment sheet 10d.
  • the second optical adjustment sheet 10b is provided so as to cover the entire surface of the third optical adjustment sheet 10c
  • the first optical adjustment sheet 10a covers the entire surface of the second optical adjustment sheet 10b. That is, in this modification, for the user U, it is as if the colors exhibited by the first, second, third, and fourth optical adjustment sheets 10a, 10b, 10c, and 10d are the colors exhibited by the display surface portion 2.
  • the colors exhibited by the first, second, third, and fourth optical adjustment sheets 10a, 10b, 10c, and 10d are mainly the first, second, third, and fourth optical adjustment sheets 10a, 10b.
  • the color of the first light L10 reflected by each of 10c and 10d is a composite color.
  • the reflection peak wavelength and the reflection peak half width in the reflection spectrum of the third optical adjustment sheet 10c satisfy the second condition.
  • the reflection peak wavelength and the reflection peak full width at half maximum in the reflection spectrum of the fourth optical adjustment sheet 10d satisfy the above-mentioned third condition.
  • the display device according to the comparative example has the same configuration as the display device 1 according to the first embodiment except that the optical adjustment sheet 10 is not provided.
  • FIG. 12 is a schematic u'v'chromaticity diagram of the second light according to the present modification and the comparative example.
  • the emission spectrum of the second light L20 transmitted through the four optical adjustment sheets in the present modification is in the broken line frame, and the emission spectrum of the second light emitted from the display surface in the comparative example is in the alternate long and short dash line frame. Shown in.
  • the emission spectra of the second light according to the present modification and the comparative example both have emission spectra of blue light, green light, and red light.
  • the emission spectrum of the second light L20 according to the present modification which is broader than the emission spectrum of the second light according to the comparative example, is sharper. It has an emission spectrum. That is, the emission spectrum of the second light L20 according to this modification has an emission spectrum of blue light, green light, and red light, which is closer to monochromatic light.
  • the second light L20 according to the present modification has a wider color gamut than the second light according to the comparative example.
  • the emission spectrum of the second light L20 according to this modification has an emission spectrum closer to that of monochromatic light. Therefore, in this modification, the color gamut can be expanded as compared with the comparative example, that is, the range of colors expressed by the second light L20 can be expanded.
  • FIG. 13 is a schematic view showing the configuration of the display device 1 and the projection device 400 according to the present embodiment.
  • the third embodiment is different from the first embodiment in that the first light source is the light source included in the projection device 400.
  • the projection device 400 is a projector, but the present invention is not limited to this, and may be, for example, a floodlight.
  • the projection device 400 is a device that projects an image onto the optical adjustment sheet 10 included in the display device 1. More specifically, the first light L10 emitted by the first light source included in the projection device 400 is light that projects an image (hereinafter, first image).
  • the optical adjustment sheet 10 can be said to be a screen for the projection device 400.
  • the first image projected by the first light L10 is different from the image displayed by the second light L20 emitted by the display surface portion 2 (hereinafter referred to as the second image), but is the same. You may.
  • the first image is an image that highlights the second image so as to stand out toward a circle surrounded by a broken line shown in the second image.
  • the first image is projected only on a part of the optical adjustment sheet 10 (that is, in the circle surrounded by the broken line), but the first image is projected on the entire optical adjustment sheet 10. May be good.
  • the second image can be made more conspicuous.
  • the light (yellow light) in the wavelength region reflected by the optical adjustment sheet 10 in the second light L20 is not visually recognized by the user U, but is in the wavelength region reflected by the optical adjustment sheet 10 in the first light L10.
  • the light (yellow light) is visually recognized by the user U. That is, since the light (yellow light) in the wavelength region lacking in the second image can be supplemented by the first image, the second image can be expressed more vividly.
  • the display device 1c according to the present embodiment, it is possible to make the second image displayed by the second light L20 more conspicuous. That is, the eye-catching effect of the display device 1 can be enhanced.
  • the second light source may have a light emitting diode that emits blue light, a light emitting diode that emits green light, and a light emitting diode that emits red light.
  • the second light L20 is light including blue light, green light, and red light.
  • the display device may or may not have a color filter.
  • one optical adjustment sheet has one colloidal crystal film, but the present invention is not limited to this.
  • one optical adjustment sheet may have a plurality of laminated colloidal crystal films.
  • one optical adjustment sheet may have as many reflection peaks as there are colloidal crystal films.
  • the second light L20 includes light of three colors, that is, has three emission peaks in the emission spectrum, but is not limited to this.
  • the second light L20 may include light of four or more colors, that is, may have four or more emission peaks in the emission spectrum.
  • the display devices 1, 101 and 201 are not limited to the liquid crystal monitor. It may be a cathode ray tube monitor, a plasma monitor, an organic EL monitor, or the like. Further, as the phosphor, a quantum dot semiconductor exhibiting fluorescence may be used.
  • Display device 2 Display surface 10
  • Optical adjustment sheet 11 1st surface 12
  • Colloidal crystal film 300 1st light source L10 1st light L20 2nd light w Reflection peak half width ⁇ 1 1st emission peak Wavelength ⁇ 2 2nd emission peak Wavelength ⁇ 3

Abstract

L'invention concerne un dispositif d'affichage (1) est éclairé avec une première lumière (L10). Le dispositif d'affichage (1) est pourvu : d'une partie de surface d'affichage (2) qui émet une seconde lumière (L20) affichant une image ; et une feuille de réglage optique (10) qui a une première surface (11) sur laquelle la première lumière (L10) est incidente et une seconde surface (12) sur laquelle la seconde lumière (L20) est incidente et réfléchit la lumière. La seconde lumière (L20) a une pluralité de longueurs d'onde de pic d'émission et, lorsqu'une condition telle qu'une longueur d'onde de pic de réflexion (λr) située entre deux longueurs d'onde de pic d'émission adjacentes l'une à l'autre est définie comme étant une première condition, qu'une condition telle que la longueur d'onde de pic de réflexion (λr) située entre la longueur d'onde de pic d'émission la plus courte et 380 nm est définie comme étant une deuxième condition et qu'une condition selon laquelle la longueur d'onde de pic de réflexion (λr) située entre la longueur d'onde de pic d'émission la plus longue et 780 nm est définie en tant que troisième condition, un spectre de réflexion satisfait au moins l'un parmi la première, la deuxième et la troisième condition.
PCT/JP2021/015670 2020-04-27 2021-04-16 Dispositif d'affichage et feuille de réglage optique WO2021220842A1 (fr)

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JP2020078390A JP7462218B2 (ja) 2020-04-27 2020-04-27 表示装置及び光学調整シート
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07325214A (ja) * 1994-05-31 1995-12-12 Matsushita Electric Ind Co Ltd 色フィルタおよびそれを用いた投写型表示装置
JP2003177236A (ja) * 2001-12-12 2003-06-27 Nitto Denko Corp 干渉型半透過反射板、およびそれを用いた干渉型半透過反射板付き偏光板、半透過反射液晶基板、ならびに半透過反射液晶表示装置
WO2019090225A1 (fr) * 2017-11-03 2019-05-09 Clearink Displays Llc Procédé, système et appareil destinés à un affichage hybride émissif réfléchissant
WO2019087615A1 (fr) * 2017-10-30 2019-05-09 株式会社デンソー Dispositif d'affichage d'image virtuelle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6789194B2 (ja) 2017-08-14 2020-11-25 富士フイルム株式会社 構造体

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07325214A (ja) * 1994-05-31 1995-12-12 Matsushita Electric Ind Co Ltd 色フィルタおよびそれを用いた投写型表示装置
JP2003177236A (ja) * 2001-12-12 2003-06-27 Nitto Denko Corp 干渉型半透過反射板、およびそれを用いた干渉型半透過反射板付き偏光板、半透過反射液晶基板、ならびに半透過反射液晶表示装置
WO2019087615A1 (fr) * 2017-10-30 2019-05-09 株式会社デンソー Dispositif d'affichage d'image virtuelle
WO2019090225A1 (fr) * 2017-11-03 2019-05-09 Clearink Displays Llc Procédé, système et appareil destinés à un affichage hybride émissif réfléchissant

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