WO2008041567A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2008041567A1
WO2008041567A1 PCT/JP2007/068608 JP2007068608W WO2008041567A1 WO 2008041567 A1 WO2008041567 A1 WO 2008041567A1 JP 2007068608 W JP2007068608 W JP 2007068608W WO 2008041567 A1 WO2008041567 A1 WO 2008041567A1
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WO
WIPO (PCT)
Prior art keywords
thin film
light
film layer
excitation light
layer
Prior art date
Application number
PCT/JP2007/068608
Other languages
English (en)
Japanese (ja)
Inventor
Akira Miyaguchi
Original Assignee
Tokai Optical Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Optical Co., Ltd. filed Critical Tokai Optical Co., Ltd.
Publication of WO2008041567A1 publication Critical patent/WO2008041567A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/42—Illuminated signs; Luminous advertising with light sources activated by non-visible radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/16—Details of telephonic subscriber devices including more than one display unit

Definitions

  • the present invention relates to a display device in which fluorescence is emitted in a fluorescent layer containing a fluorescent material by relatively high energy excitation light such as ultraviolet light and blue light.
  • Patent Document 1 allows a display light to be viewed through a display window 2 formed on a front panel la of a casing with a light source such as a liquid crystal display with a backlight or a fluorescent display tube.
  • a fluorescent paint containing a fluorescent material is applied to a transparent plastic substrate and irradiated with excitation light from a light source (excitation light emitting unit 1).
  • Excitation light emitting unit 1 There are display devices that use fluorescence to display fluorescence on a substrate.
  • Patent Document 2 is given as an example of such a display device.
  • Patent Document 1 JP 2005-55887 A
  • Patent Document 2 Japanese Patent Laid-Open No. 2003-27057
  • each of the conventional display devices uses an external light source
  • the light source is visually observed through the display window 2 or a plastic substrate coated with a fluorescent paint.
  • the present invention has been made paying attention to such problems existing in the prior art.
  • the purpose of the present invention is to provide a display device that can display only the display portion during light emission without exposing the light source in a display device using fluorescence.
  • At least an excitation light generation source that generates excitation light that excites fluorescence by colliding with a fluorescent material, and a dielectric disposed in front of the excitation light generation source
  • a dielectric thin film layer comprising: a reflective thin film layer; and a transparent fluorescent layer containing a fluorescent material disposed at least a predetermined distance from the excitation light source on the front surface of the dielectric reflective thin film layer,
  • the gist is that it transmits excitation light and reflects visible light.
  • the excitation light emitted by the excitation light generation source passes through the dielectric reflecting thin film layer and reaches the fluorescent layer.
  • the excitation light enters the fluorescent layer and collides with the fluorescent material to excite the fluorescent material.
  • the excitation light is absorbed by the fluorescent material, and the fluorescent material generates fluorescence based on the excitation light.
  • the generated fluorescence is displayed in a predetermined display mode in the fluorescent layer.
  • the optical characteristics of the dielectric reflective thin film layer are such that the wavelength range of the excitation light can be transmitted but the wavelength range of the visible light is reflected and cannot be transmitted. Therefore, the excitation light source cannot be seen from the fluorescent layer side through the dielectric reflective thin film layer.
  • the dielectric reflective thin film layer can set the transmittance of light having a wavelength in the visible light range from about 380 nm to about 780 nm to be as low as possible (high reflectivity) to excite the fluorescent material.
  • high-energy visible light wavelength light that can be both visible light such as dark purple and blue and can be excitation light is not regarded as visible light when used as excitation light.
  • the dielectric reflective thin film layer is intended to prevent the excitation light source from being viewed from the fluorescent layer side, the dielectric reflective thin film layer is not necessarily required to completely reflect all visible wavelengths. There is no. The wavelength in the visible range It is sufficient to shield and clear a certain reflectivity.
  • the dielectric reflective thin film layer is preferably as high as the transmittance of the excitation light, but need not be 100%.
  • the dielectric reflective thin film layer is a film that selectively transmits and reflects light in a predetermined wavelength range.
  • the dielectric reflective thin film layer generally has a multilayer structure. It will be taken.
  • Each component film layer of the multilayer film is a dielectric made of metal oxide or metal fluoride.
  • TiO titanium dioxide
  • Ta O tantalum pentoxide
  • ZrO zircon oxide
  • Al 2 O aluminum oxide
  • Nb O niobium pentoxide
  • SiO silicon oxide
  • F magnesium fluoride
  • ZnO zinc oxide
  • HfO hafnium oxide
  • CaF fluoridation lucium
  • the dielectric film of the present invention is preferably composed of alternating layers in which at least two kinds of dielectrics selected from these nine kinds are alternately laminated with a low refractive index material and a high refractive index material in the light transmitting direction. .
  • the number of the multilayer film comprised is not specifically limited.
  • a dielectric optical film can be configured by selecting and combining compounds in order to exhibit reflection performance or transmission performance for a desired wavelength.
  • the method for forming the dielectric reflective thin film layer is not particularly limited, but it is generally preferable to form the film by a vapor deposition method or a sputtering method.
  • the fluorescent layer may be formed by dispersing a fluorescent material in a solvent and applying a sol solution on a transparent substrate and drying to form a film body.
  • the fluorescent material is dispersed in a plastic material.
  • the transparent base material itself may be configured as a fluorescent layer so as to form a molded product.
  • a fluorescent layer having a thickness can be constructed by forming the fluorescent layer by molding in this manner, three-dimensional fluorescence can be emitted in the fluorescent layer.
  • the transparent material including translucent material is not particularly limited.
  • the RGB fluorescent material used by the fluorescent color can be freely selected.
  • the red fluorescent material is 6MgO 'As O: Mn
  • At least an excitation light source that generates excitation light that excites fluorescence by colliding with a fluorescent material and a front surface of the excitation light generation source are arranged.
  • the gist is that the layer transmits excitation light and selectively absorbs visible light.
  • the excitation light emitted by the excitation light generation source passes through the wavelength selective absorption layer and reaches the fluorescent layer.
  • the excitation light enters the fluorescent layer and collides with the fluorescent material to excite the fluorescent material.
  • the excitation light is absorbed by the fluorescent material, and the fluorescent material generates fluorescence based on the excitation light.
  • the generated fluorescence is displayed in a predetermined display mode in the fluorescent layer.
  • the characteristics of the wavelength selective absorption layer are such that the wavelength region of the excitation light can be transmitted but the wavelength region of the visible light is absorbed and cannot be transmitted. Therefore, the excitation light source is not visible from the fluorescent layer side through the wavelength selective absorption layer! /.
  • the absorption rate of light having a wavelength in the visible light range from 380 nm to 780 nm is set to be as high as possible, and the light having a large energy that can excite the fluorescent material is set to 380 nm or less.
  • the high-energy visible light wavelength light that can be both visible light and excitation light such as deep purple and blue is not regarded as visible light when used as excitation light. Since the wavelength selective absorption layer is intended to prevent the excitation light source from being viewed from the fluorescent layer side, the wavelength selective absorption layer is not necessarily required to completely absorb all visible wavelengths.
  • the wavelength selective absorption layer is preferably as the transmittance of the excitation light is high, but it is not necessary to have a transmittance of 100%.
  • the wavelength selective reflection thin film layer is disposed between the wavelength selective absorption layer and the fluorescent layer, and the wavelength selective reflection thin film layer transmits excitation light and selectively reflects visible light. I prefer to be! / As a result, the light in the selected wavelength region is reflected when viewed from the fluorescent layer side, and the remaining visible wide region is absorbed by the wavelength selective absorption layer, so that the excitation light source is visually observed. This makes it possible to visually observe the desired selected color tone as the background of the fluorescent layer.
  • the wavelength selective absorption layer is a film that selectively transmits and absorbs light in a predetermined wavelength range, and in the visible light layer, contains and disperses a dye of a predetermined color.
  • a thin film layer that can exhibit its absorption characteristics by coating and dispersing organic compounds such as benzophenone and benzotriazole and metal oxides such as zinc oxide cerium oxide and titanium oxide oxide in the ultraviolet region is applied. It is possible to form.
  • the dye or metal oxide may be dispersed in a transparent base material such as attalinole to constitute the base material itself as a wavelength selective absorption layer.
  • ultraviolet light and blue light can be considered as excitation light capable of causing the fluorescent material to fluoresce. Since ultraviolet light is higher in energy than blue light, high-intensity fluorescent light emission can be expected, and excitation light is not visible.
  • a second reflective thin film layer for reflecting the ultraviolet light to the outside of the fluorescent layer is used to block the ultraviolet light leaking forward from the fluorescent layer without exciting the fluorescent material. Les, preferred to place.
  • a mobile terminal device such as a mobile phone is assumed to be used for a main display screen or a sub display screen of a mobile information processing device such as a mobile personal computer or an electronic notebook.
  • a mobile information processing device such as a mobile personal computer or an electronic notebook.
  • the excitation light source is not visible from the fluorescent layer side by the wavelength-selective dielectric reflective thin film layer or the wavelength-selective absorption layer, so that the fluorescence can be obtained without exposing the excitation light source. It becomes possible to display only the fluorescence on the layer.
  • the camera-equipped mobile phone 10 has an outer shape in which a first casing 11 and a second casing 12 are connected by a hinge portion 13.
  • the first and second casings 11 and 12 can be opened and closed by hinges 13 and are folded as shown in Fig. 1 (a) when portable, and as shown in Fig. 1 (b) when usable as a telephone. Will open and the inside will be exposed.
  • a sub display screen 15 and a lens 16 for taking an image are arranged on the outer surface of the first housing 11.
  • the lens 16 is provided with an imaging device, but illustration and explanation thereof are omitted.
  • a main display screen 17 composed of a liquid crystal display device is disposed on the inner surface of the first housing 11.
  • an operation unit 18 including a numeric keypad and various menu keys is disposed on the inner surface of the second housing 12.
  • the camera-equipped mobile phone 10 includes a normal mechanism as a mobile phone, for example, a modem, a microphone, a receiver, a transmission / reception unit, an antenna, and the like, but the description thereof is omitted.
  • a display screen plate 22 as a fluorescent layer constituting the sub display screen 15 is fitted in a through hole 21 formed in the first housing 11.
  • the display screen plate 22 is a transparent square plastic plate made of polycarbonate.
  • the display screen plate 22 contains RGB (red, green, and blue) fluorescent materials in a dispersed manner, and generates red, green, and blue fluorescence using ultraviolet light as excitation light. These fluorescent colors are mixed to produce white light.
  • a first reflective thin film layer 23 is formed on the back surface of the display screen plate 22 (inside the first housing 11).
  • An example of the characteristics of the first reflective thin film layer 23 is shown in Table 1.
  • Table 1 the solid line indicates the transmittance and the broken line indicates the reflectance.
  • the first reflective thin film layer 23 is set to an average transmittance of about 98% (an average reflectance of about 2%) for light of 250 nm to 350 nm, which is the wavelength region of near ultraviolet light, and has a large visible light range.
  • the reflectivity is set to about 95% on average (transmittance of about 5% on average).
  • the first reflective thin film layer 23 is set to have a very low reflectance for near-ultraviolet light having a very high reflectance for visible light!
  • a second reflective thin film layer 24 is formed on the surface of the display screen plate 22 (external side of the first housing 11).
  • An example of the characteristics of the second reflective thin film layer 24 is shown in Table 2.
  • Table 2 the solid line shows the transmittance and the broken line shows the reflectance.
  • the second reflective thin film layer 24 is set to have an average reflectance of about 98% (average transmittance of about 2%) for light of 250 nm to 350 nm, which is the wavelength region of near ultraviolet light, and has a large visible light range.
  • the transmittance is set to about 95% on average (reflectance of about 5% on average). That is, the second reflective thin film layer 24 is set to have a very low reflectance for visible light having a very high reflectance for ultraviolet rays!
  • a matrix LED 25 made of ultraviolet light emitting diode elements arranged in 10 ⁇ 10 is disposed in the first housing 11 and on the bracket 26, a matrix LED 25 made of ultraviolet light emitting diode elements arranged in 10 ⁇ 10 is disposed.
  • the matrix LED 25 irradiates ultraviolet light in the direction of the first reflective thin film layer 23 based on control by a control unit (not shown).
  • the display screen plate 22, the first reflective thin film layer 23, and the second reflective thin film layer 24 constitute a sub display screen 15, and a matrix LED 25 is added to the sub display screen 15 to constitute a fluorescent display mechanism 27.
  • the matrix LED 25 emits ultraviolet light as excitation light from a predetermined ultraviolet light emitting diode element
  • the ultraviolet light passes through the first reflective thin film layer 23 and enters the display screen plate 22.
  • an RGB fluorescent material When an RGB fluorescent material is encountered, it is excited to generate fluorescence (trajectory A).
  • predetermined characters, numbers, and the like are displayed as fluorescence on the display screen plate 22 as the sub display screen 15.
  • Fluorescence is displayed thickly in the front-rear direction. It passes through the second reflective thin film layer 24 as a bright band that is a lumpy light mass generated by fluorescence like an elongated egg shape in the screen plate 22 and is visually observed by the viewer. It will be.
  • the first reflective thin film layer 23 is recognized as a mirror surface by the viewer.
  • the ultraviolet light encounters RGB fluorescent material in the display screen plate 22. Some parts that do not excite this may pass through the display screen plate 22 as they are. In this case, the ultraviolet light is reflected by the second reflective thin film layer 24 (that is, shielded) and returns toward the display screen plate 22 (trajectory B). This reflected ultraviolet line partially contributes to excitation and partly attenuates in the display screen plate 22.
  • Matrix LED25 will be displayed in a display mode in which a bright band appears in the display screen plate 22 that is not visible to the viewer, providing a new sub display screen that has never existed before. Is possible.
  • Example 2 uses a high-intensity blue light-emitting diode element instead of an ultraviolet light-emitting diode element as the matrix LED 25 in Example 1. The description of the same configuration as that of Example 1 is omitted.
  • Example 2 does not use ultraviolet light, and therefore the second reflective thin film layer 24 is not formed on the outer surface of the display screen plate 22.
  • RGB fluorescent material is selected for blue light-emitting diodes.
  • the first reflective thin film layer 23 is set to have an average transmittance of about 95% (average reflectance of about 5%) for light in the blue light wavelength range of 430 to 460 nm, and most of the visible light range. For the light of 500nm to 780nm that occupies, the reflectivity is set to about 95% on average (transmittance of about 5% on average). That is, the first reflective thin film layer 23 is set to have a very low reflectance for blue light, which has a very high reflectance for visible light except blue!
  • the fluorescent light passes through the second reflective thin film layer 24 as a bright band that is a lumpy light mass generated by fluorescent light like a long oval shape in the display screen plate 22 that is thick in the front-rear direction and is visually observed by the viewer.
  • the Rukoto On the other hand, since the visible light is almost blocked by the first reflective thin film layer 23, the first reflective thin film layer 23 is recognized as a mirror surface by the viewer.
  • the effect similar to the effect (1) of the example 1 is achieved in the example 2. It is. Further, since it is not necessary to provide the second reflective thin film layer 24 as in Example 1, it is possible to contribute to the permeation rate []% for cost reduction.
  • Example 3 uses an absorbing thin film layer 28 as shown in FIG. 8 in place of the first reflective thin film layer 23 in Example 1! In the following description, the configuration similar to that in Example 1 is described!
  • An absorption thin film layer 28 is formed on the back surface of the display screen plate 22 (inside the first housing 11).
  • An example of the characteristics of the absorption thin film layer 28 is shown in Table 4.
  • Table 4 the solid line indicates the transmittance, and the broken line indicates the absorptance.
  • the first reflective thin film layer 23 has an average transmittance of about 98% for light of 250 nm to 350 nm, which is the wavelength region of near ultraviolet light. (Average reflectance of about 2%), and for light of 450 nm to 780 nm, which occupies most of the visible light range, it is set to an average of about 95% absorption (average of about 5% transmittance). Yes. That is, the absorption thin film layer 28 is set to have a very low absorptivity (high transmittance) for near-ultraviolet light having a very high absorptivity for visible light!
  • the matrix LED 25 emits ultraviolet light as excitation light from a predetermined ultraviolet light emitting diode element
  • the ultraviolet light passes through the absorption thin film layer 28 and enters the display screen plate 22.
  • an RGB fluorescent material When an RGB fluorescent material is encountered, it is excited to generate fluorescence.
  • predetermined characters, numbers, and the like are displayed as fluorescence on the display screen plate 22 as the sub display screen 15. Fluorescence is within the display screen plate 22 that is thick in the front-rear direction! /, Elongated! /, The second reflective thin film layer 24 as a bright zone that is a faint lump of light generated by fluorescence like an egg shape 24 Will be seen by the viewer.
  • the viewer since most visible light is absorbed by the absorbing thin film layer 28, the viewer recognizes the absorbing thin film layer 28 as a black background in which all visible light regions are absorbed.
  • an acrylic transparent plate 32 is disposed in a large opening 31 formed on the side surface of a building S such as a building.
  • a first reflective thin film layer 33 is formed on the inner surface of the transparent plate 32. Facing the large opening 31, the building S is provided with a matrix LED 34 composed of ultraviolet light emitting diode elements and an optical system for enlarging and projecting the light emission pattern image.
  • a large panel 35 is erected on the ground at an outer position facing the large opening 31 of the building S.
  • the panel 35 of Example 4 is a transparent plastic plate made of polycarbonate.
  • Panel 35 contains RGB (red, green, and blue) fluorescent materials in a dispersed manner, and generates red, green, and blue fluorescence using ultraviolet light as excitation light. These fluorescent colors are mixed to produce white light.
  • a space is formed between panel 35 and building S. In addition, people in the space It is preferable to provide a fence that prevents traffic.
  • a second reflective thin film layer 36 is formed on the surface of the panel 35.
  • the first reflective thin film layer 33 and the second reflective thin film layer 36 in Example 4 have the same optical characteristics as the first reflective thin film layer 23 and the second reflective thin film layer 24 in Example 1 (Tables 1 and 2). ).
  • the matrix LED 34 emits ultraviolet light as excitation light from a predetermined ultraviolet light emitting diode element
  • the ultraviolet light passes through the first reflective thin film layer 33 and enters the panel 35.
  • an RGB fluorescent material When an RGB fluorescent material is encountered, it is excited to generate fluorescence.
  • predetermined characters, numbers, and the like are displayed as fluorescence as a large display device.
  • the fluorescent light passes through the second reflective thin film layer 36 as a bright band generated by fluorescent light like a long egg-shaped in the panel 35 having a thickness in the front-rear direction and is visually observed by the viewer.
  • the visible light is almost blocked by the first reflective thin film layer 33, the viewer will recognize the first reflective thin film layer 33 as a mirror surface.
  • the ultraviolet light is reflected by the second reflective thin film layer 36 and is not emitted forward.
  • Matrix LED34 will be displayed in a display mode in which the bright band appears in the panel 35 that is not visible to the viewer, and it is possible to provide a new large display device that has never existed before It becomes.
  • Example 5 Based on Example 5, another example in which both the reflective thin film layer and the wavelength selective absorption thin film layer are arranged with respect to the fluorescent layer will be described.
  • the fifth embodiment can be applied to, for example, the camera-equipped mobile phone and the large display device of the above embodiments;! As shown in FIG. 9, a fluorescent layer 41 and a matrix LED 42 that irradiates the fluorescent layer 41 with ultraviolet light as excitation light are arranged at a predetermined interval.
  • a reflective thin film layer 43 is formed on the rear surface of the fluorescent layer 41 (matrix LED 42 side). Further, an absorption thin film layer 44 is laminated on the reflection thin film layer 43 by coating.
  • the fluorescent layer 41 corresponds to the display screen plate 22 or the panel 35 in the above embodiment.
  • the reflective thin film layer 43 is selectively set to a high reflectance (average reflectance of about 90%) with respect to light in the green wavelength range of 500 nm to 570 nm.
  • the reflectivity is set to about 5% on average (transmittance of about 95% on average).
  • the reflective thin film layer 43 transmits almost all of the visible light in the other wavelength region where the reflectance of green light is extremely high, especially the near-ultraviolet light that is excitation light has a very low absorption rate. It is set as follows.
  • the absorption thin film layer 44 is set to have an average transmittance of about 98% (an average reflectance of about 2%) for light of 250 nm to 350 nm, which is the wavelength region of near ultraviolet light, and occupies most of the visible light range. For 450 nm to 780 nm light, the average absorptance is set to about 98% (average transmittance of about 2%). In other words, the absorption thin film layer 44 is set so as to transmit almost all of the near-ultraviolet light having an extremely high absorption rate for visible light and having a very low absorption rate.
  • the matrix LED 42 emits ultraviolet light as excitation light from a predetermined ultraviolet light emitting diode element
  • the ultraviolet light passes through the reflective thin film layer 43 and the absorption thin film layer 44 and enters the fluorescent layer 41 as shown by locus C in FIG. To do.
  • an RGB fluorescent material When an RGB fluorescent material is encountered, it is excited to generate fluorescence.
  • predetermined characters, numbers, etc. are displayed as fluorescent light as a large display device.
  • the fluorescent light is visually recognized by the viewer as a bright band generated by the bright light such as an egg shape in the fluorescent layer 41 having a thickness in the front-rear direction.
  • the absorbing thin film layer 44 Since the wavelength is absorbed, the absorbing thin film layer 44 is recognized as a dark color by the viewer, so that the absorbing thin film layer 44 serves as a shielding layer and the matrix LED 42 is not visually observed. At this time, the absorption thin film layer 44 reaches a wavelength range other than the green wavelength range as shown in Table 8.
  • the green LED is not only visible as the background of the fluorescent layer 41, but when the excitation light source is extinguished and the external light of the fluorescent layer 41 is bright, the matrix LED 42 is visually observed. Even when the light is on, if the external light is weak and dark, it may be visible due to fluorescent light emission.Thus, the double-layer structure of the reflective thin film layer 43 and the absorption thin film layer 44 eliminates such a problem. Can be resolved.
  • matrix LEDs 25 and 34 were used as the excitation light source, but this is not a limitation as long as excitation light can be emitted! /.
  • an image to be projected, a projection pattern, a photograph, or the like may be projected using an ultraviolet lamp.
  • the power S allows the matrix LED 34 to be projected onto the panel 35 as it is, and a magnifying lens or the like may be arranged in the optical system to enlarge the projection light! /.
  • the thickness, size and shape of the display screen plate 22 and the panel 35 as the phosphor layer can be appropriately changed.
  • the phosphor layer may be formed by means such as vapor deposition or coating.
  • the first reflective thin film layers 23 and 33 may be directly formed on the surface of the excitation light source, for example, as if a resin layer on the element surface is coated. • In Example 5 above, the wavelength range with the green peak was reflected and used as the background, but other colors can also be set as the background.
  • FIG. L (a) is a perspective view of the camera-equipped mobile phone according to the first and second embodiments of the present invention, and (b) is a side view of the same.
  • FIG. 2 is a partially enlarged cross-sectional view of the vicinity of the sub display screen of the camera-equipped mobile phone according to the first embodiment.
  • FIG. 3 is an exploded perspective view of the fluorescence display mechanism of the camera-equipped mobile phone according to the first embodiment.
  • FIG. 4 is a schematic explanatory view for explaining the principle of the fluorescence display mechanism in the first embodiment.
  • FIG. 5 is a partially enlarged cross-sectional view of the vicinity of the sub display screen of the camera-equipped mobile phone according to the second embodiment.
  • FIG. 6 is a schematic explanatory view for explaining the principle of the fluorescence display mechanism in the second embodiment.
  • FIG. 7 is a schematic sectional side view of the large display device of Example 4.
  • FIG. 8 is a partially enlarged sectional view of the vicinity of the sub display screen of the camera-equipped mobile phone according to the third embodiment.
  • FIG. 9 is a schematic explanatory view for explaining the principle of the fluorescence display mechanism of Example 5 in the same manner.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

[PROBLÈMES] Proposer un dispositif d'affichage qui utilise la fluorescence et permet seulement à une section d'affichage d'être observée lors de l'émission de lumière sans exposer une source de lumière. [MOYENS POUR RÉSOUDRE LES PROBLÈMES] Un dispositif d'affichage est composé d'une DEL à matrice (25) qui génère des ultraviolets pour exciter une fluorescence en amenant un écran de sous-affichage d'un téléphone cellulaire ou similaires à entrer en collision avec une matière fluorescente ; d'une première couche (23) en film mince de réflexion composée d'une couche en film mince de réflexion diélectrique disposée sur la surface avant de la DEL à matrice (25) ; et d'une plaque (22) d'écran d'affichage transparente disposée à une distance prescrite à partir de la DEL à matrice (25) sur la surface avant de la première couche (23) en film mince de réflexion et contient une matière fluorescente. La première couche (23) en film mince de réflexion transmettant la lumière d'excitation, une fluorescence est générée dans la plaque (22) d'écran d'affichage ; la lumière visible etant réfléchie par la première couche (23) en film mince de réflexion, la DEL à matrice (25) ne peut pas être observée de l'extérieur.
PCT/JP2007/068608 2006-10-02 2007-09-26 Dispositif d'affichage WO2008041567A1 (fr)

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JP2006270335A JP2008089945A (ja) 2006-10-02 2006-10-02 表示装置

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FR2985042B1 (fr) * 2011-12-22 2014-01-17 Saint Gobain Dispositif de visualisation d'une image sur un support feuillete
CN104252818A (zh) * 2014-09-11 2014-12-31 苏州合欣美电子科技有限公司 一种户外环保led荧光显示屏
CN110720059B (zh) * 2017-06-14 2022-03-15 日东电工株式会社 光学层叠体
KR102136921B1 (ko) * 2018-03-02 2020-07-28 주식회사 루멘스 차량 외판 부착형 플렉시블 디스플레이 장치
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JP2003076305A (ja) * 2001-08-31 2003-03-14 Casio Comput Co Ltd 紫外線発光装置及び電子機器
JP2005053468A (ja) * 2003-07-31 2005-03-03 Keitai Kin 光変色化合物を利用した自動車用防眩ミラー

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0641268Y2 (ja) * 1989-03-24 1994-10-26 株式会社シギスタデイオ 内照式表示装置
JPH04278986A (ja) * 1991-03-07 1992-10-05 Nissan Motor Co Ltd 表示装置
JP2003066873A (ja) * 2001-08-29 2003-03-05 Mk Seiko Co Ltd 表示装置
JP2003076305A (ja) * 2001-08-31 2003-03-14 Casio Comput Co Ltd 紫外線発光装置及び電子機器
JP2005053468A (ja) * 2003-07-31 2005-03-03 Keitai Kin 光変色化合物を利用した自動車用防眩ミラー

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