WO2010131735A1 - 照光表示装置 - Google Patents

照光表示装置 Download PDF

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Publication number
WO2010131735A1
WO2010131735A1 PCT/JP2010/058182 JP2010058182W WO2010131735A1 WO 2010131735 A1 WO2010131735 A1 WO 2010131735A1 JP 2010058182 W JP2010058182 W JP 2010058182W WO 2010131735 A1 WO2010131735 A1 WO 2010131735A1
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WO
WIPO (PCT)
Prior art keywords
light
layer
display
light guide
guide layer
Prior art date
Application number
PCT/JP2010/058182
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
徹 伊藤
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to CN201080012062.4A priority Critical patent/CN102356421B/zh
Priority to JP2011513383A priority patent/JP4979835B2/ja
Publication of WO2010131735A1 publication Critical patent/WO2010131735A1/ja

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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
    • G09F13/18—Edge-illuminated signs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area

Definitions

  • the present invention relates to an illuminated display device that can select and illuminate at least a first display content and a second display content, and can make one display content inconspicuous when the other display content is illuminated. .
  • an input device for a portable electronic device an input device for a keyboard device, or an in-vehicle input device, a push button type operation body is provided with an illumination unit that expresses characters, symbols, figures, etc., and is provided inside the device. Light emitted from a light source such as a light emitting diode is applied to the illumination unit so that the light can be illuminated.
  • a light source such as a light emitting diode
  • the illuminated display device described in Patent Literature 1 below includes a transparent key top, a translucent first printed layer that is located on the back side of the key top and represents the first display content, and is located on the back side. Then, a light-transmitting second print layer serving as a background color is provided, and a light-shielding third print layer representing the second display content is provided on the back side of the second print layer. .
  • the illuminated display device described in Patent Document 2 below has a first unit and a second unit superimposed on the back of the first unit.
  • the first unit has a first surface light emitter having a first display part and a first light source
  • the second unit has a second surface light emitter having a second display part and a second light source.
  • a light source a light source.
  • the display content of the first display unit can be illuminated when the first light source is turned on
  • the display content of the second display unit can be illuminated when the second light source is turned on. is there.
  • the first print layer representing the first display content and the third print layer representing the second display content are separate print layers.
  • the second display content by applying light from the back of the print layer, it is not possible to avoid the first display content being displayed lightly, and the display content of one is not conspicuous. It is difficult to display only the contents clearly.
  • the first display unit and the second display unit are provided in different surface light emitters, so that the second light source is turned on and the second surface light emission is performed.
  • the second display unit provided on the body, it is difficult to make the first display content located in front of it completely inconspicuous.
  • the illuminated display apparatus described in patent document 3 changes the diameter and arrangement
  • the present invention solves the above-mentioned conventional problems, and can switch between the first display content and the second display content and display them clearly, and the display content of the other is not conspicuous. It is an object of the present invention to provide an illuminated display device that can clearly display only the image.
  • the present invention relates to an illuminated display device capable of selectively illuminating a first display and a second display, A light scattering layer that scatters both reflected light and transmitted light; a light guide layer that is optically separated from the surface of the light scattering layer; a light source that provides light to the inside of the light guide layer; A display light guide layer disposed between the light scattering layer and the light guide layer to guide the light propagating through the light guide layer to the light scattering layer and reflect the light, and transmitted light on the back surface of the light scattering layer And a light sending section that gives The display light guide layer is formed in a pattern representing the first display, and the light representing the second display is applied from the light sending part to the light scattering layer.
  • light representing the first display is scattered light reflected by the light scattering layer
  • light representing the second display is also scattered light transmitted through the same light scattering layer. That is, the first display and the second display are illuminated by the scattered light scattered by the same light scattering layer. Therefore, when the second display is illuminated, the display light guide layer simply functions as a light guide layer that transmits the scattered light. When the second display is illuminated, the first display is mostly Disappears.
  • the present invention can be configured such that the display light guide layer is formed separately from the light guide layer and is fixed to both the light guide layer and the light scattering layer.
  • the display light guide layer is formed separately from the light guide layer and is fixed to both the light guide layer and the light scattering layer.
  • at least a part of the display light guide layer is an adhesive layer.
  • the display light guide layer of the present invention can be configured such that a part of the light guide layer is formed to protrude toward the light scattering layer and is fixed to the surface of the light scattering layer.
  • the present invention provides a refractive index higher than that of both the light guide layer and the display light guide layer between the light guide layer and the light scattering layer in a region where the display light guide layer is not provided.
  • a low low refractive index layer is provided.
  • the low refractive index layer is an air layer.
  • the present invention provides the second light guide layer in which the light sending section is optically separated from the back surface of the light scattering layer, and a second light that gives light to the inside of the second light guide layer.
  • a second light source disposed between the light guide layer, the second light guide layer, and the light scattering layer to guide and transmit the light propagating through the second light guide layer to the back surface of the light scattering layer;
  • a display light guide layer, and the second display light guide layer is formed in a pattern representing the second display.
  • the second display light guide layer has the same structure as the display light guide layer provided on the front side of the light scattering layer.
  • the light transmission unit includes a third light guide layer disposed on a back surface side of the light scattering layer, a light source that gives light to the inside of the third light guide layer, and the third light source. And a pattern forming portion for applying light propagating through the light guide layer to the light scattering layer, and the pattern forming portion is formed in a pattern representing the second display.
  • a light shielding layer that blocks transmission of light is provided between the light scattering layer and the third light guide layer, and the pattern forming portion is formed in a portion lacking the light shielding layer,
  • the light scattering layer may be partially provided in the pattern forming unit.
  • the structure of the light sending part can be made thin. It is also possible to change the light transmittance of the light scattering portion formed in the pattern forming portion in accordance with the distance from the light source, and it is possible to illuminate a plurality of illumination portions with luminance with little variation. .
  • the light sending unit is a light emitting unit that generates light having a pattern representing the second display.
  • a plurality of sets are provided so that the light guide layer, the light source, and the display light guide layer can be optically separated, and / or on the back side of the light scattering layer, It is also possible to select and illuminate three or more types of displays by providing a plurality of sets of light transmitting portions optically separated from each other.
  • the illuminated display device of the present invention can clearly display the other of the first display and the second display without conspicuous.
  • the first display and the second display can be displayed with substantially the same luminance.
  • the side view which shows the illuminated display apparatus of the 1st Embodiment of this invention (A) shows the first display of the illuminated display device of the first embodiment, (B) shows the second display, (A) is a plan view showing a modification of the positional relationship between the first display and the second display, (B) is an enlarged cross-sectional view taken along line BB in (A),
  • the side view which shows the illuminated display apparatus of the 2nd Embodiment of this invention The side view which shows the illuminated display apparatus of the 3rd Embodiment of this invention, The side view which shows the modification of the illuminated display apparatus of 3rd Embodiment, The side view which shows the illumination display apparatus of the 4th Embodiment of this invention in which the illumination of chromatic color was enabled,
  • the side view which shows the illuminated display apparatus of the 6th Embodiment of this invention The side view which shows the illuminated display apparatus
  • the illuminated display device 1 shown in FIG. 1 has a reflective display unit 2 and a light sending unit 3 located on the back side thereof.
  • the upper side in the figure (Z1 direction) will be described as the front, and the surface of each layer facing the Z1 direction will be described as the front surface, and the lower side of the figure (Z2 direction) will be described as the rear.
  • the rear side (Z2 direction) of the light sending unit 3 is the inside of the device main body on which the illuminated display device 1 is mounted.
  • a switch mechanism that is pushed from the front via the illuminated display device 1 is disposed.
  • the light emitted forward (Z1 direction) from the illumination display device 1 is visually observed by the user.
  • the reflective display unit 2 has a first light guide layer 11.
  • the first light guide layer 11 is formed of a translucent and flexible synthetic resin sheet, such as a polyurethane sheet, a polycarbonate sheet, or a PET (polyethylene terephthalate) sheet.
  • the front surface 11a and the back surface 11b of the first light guide layer 11 are smooth surfaces.
  • the 1st light guide layer 11 can be made to reflect the light which injected in the inside on the surface 11a and the back surface 11b which are boundary surfaces with the exterior, and to propagate inside, and is transparent or semi-transparent.
  • a light scattering layer 12 is provided behind the back surface 11b of the first light guide layer 11 at a distance so as to be optically separated from the first light guide layer 11.
  • the light scattering layer 12 can scatter light applied to the front surface 12a and reflect the light forward (Z1 direction), and can transmit light applied to the back surface 12b while being scattered toward the front surface 12a.
  • the light scattering layer 12 is preferably one that scatters light by its internal structure.
  • other layers such as the first display light guide layer 13 and the second display light guide layer 22 are adhesives. And the scattering function due to surface roughness is lost or deteriorated when optically bonded via a pressure sensitive adhesive or an adhesive.
  • the material that can scatter light by the internal structure is a crystalline material that has a grain boundary that reflects and absorbs light inside, or a material that changes the light transmission path inside by mixing multiple materials. Etc. Alternatively, it is a synthetic resin sheet in which a white filler such as magnesium oxide or calcium oxide fine powder is mixed. Alternatively, a translucent white resin sheet containing a pigment such as white is used.
  • a thin paper material or a fiber structure such as a nonwoven fabric may be used as long as it reflects scattered light and transmitted light.
  • the first display light guide layer 13 is provided between the back surface 11 b of the first light guide layer 11 and the surface 12 a of the light scattering layer 12.
  • the planar shape of the first display light guide layer 13 is a pattern of letters, numbers, symbols, and other figures that are the first display. In this embodiment, as shown in FIG.
  • the display light guide layer 13 is formed in a pattern indicating the numeral “8” when viewed from the front.
  • the first display light guide layer 13 is a transparent or translucent synthetic resin layer or adhesive layer that can propagate light inside.
  • the first display light guide layer 13 is a double-sided adhesive tape in which an adhesive layer is provided on both sides of the base film, and the back surface 11b of the first light guide layer 11 and the light scattering layer 12 are formed by the adhesive layer. It is fixed in close contact with the surface 12a.
  • the first display light guide layer 13 is a film formed of the same synthetic resin material as that of the light guide layer 11 or the same kind of synthetic resin material, and this film is connected to the first guide light guide via an adhesive or a pressure-sensitive adhesive.
  • the back surface 11 b of the light layer 11 and the front surface 12 a of the light scattering layer 12 are closely attached and fixed.
  • the first display light guide layer 13 is an adhesive or a pressure-sensitive adhesive layer as a whole, and is formed of a urethane-based adhesive that can propagate light inside.
  • the 1st display light guide layer 13 may be formed with the resin material which the whole has adhesiveness.
  • the light transmission layer 14 is a layer having a lower refractive index than both the first light guide layer 11 and the first display light guide layer 13.
  • the difference in refractive index between the light transmission layer 14 and the first light guide layer 11 and the difference in refractive index between the light transmission layer 14 and the first display light guide layer 13 are the same as the first light guide layer 11 and the first light guide layer 11. It is larger than the difference in refractive index with the one display light guide layer 13.
  • the difference in refractive index between the first light guide layer 11 and the first display light guide layer 13 is the difference in refractive index between the first light guide layer 11 and the light transmission layer 14, as well as the first The difference in refractive index between the display light guide layer 13 and the light transmission layer 14 is slight.
  • the light transmission layer 14 is an air layer, and the refractive indexes of both the first light guide layer 11 and the first display light guide layer 13 are approximately 1.5.
  • the refractive index of the air layer is approximately 1.0.
  • the difference in refractive index between the first light guide layer 11 and the first display light guide layer 13 is preferably 0.2 or less, and more preferably 0.1 or less.
  • the light transmission layer 14 may be formed of a transparent resin layer that can transmit light with a low refractive index, instead of an air layer.
  • a light emitting diode 15 as a first light source is opposed to an end surface 11c facing the left side of the first light guide layer 11.
  • Light emitted from the light emitting diode 15 enters the first light guide layer 11 from the end face 11c.
  • the light scattering layer 12 and the left end portion of the light sending part 3 are covered with a mask 16, and the light emitted from the light emitting diode 15 enters the first light guide layer 11, but the light scattering layer 12 and the light sending part 3 is not given directly.
  • a second light guide layer 21 is provided behind the back surface 12 b of the light scattering layer 12 at a distance so as to be optically separated from the light scattering layer 12.
  • the 2nd light guide layer 21 is a translucent and flexible synthetic resin sheet, and the surface 21a and the back surface 21b are smooth.
  • the second light guide layer 21 is the same as the first light guide layer 11.
  • a second display light guide layer 22 is provided between the front surface 21 a of the second light guide layer 21 and the back surface 12 b of the light scattering layer 12.
  • the planar shape of the second display light guide layer 22 is a pattern of characters, numbers, symbols, and other figures that are the second display. In this embodiment, as shown in FIG.
  • the display light guide layer 22 is formed in a pattern indicating “A” in Roman letters.
  • the second display light guide layer 22 is fixed to the second light guide layer 21 or formed integrally with the second light guide layer 21 and fixed to the back surface 12 b of the light scattering layer 12.
  • the second display light guide layer 22 has the same structure as the first display light guide layer 13.
  • a light transmission layer 23 is formed in a portion where the second display light guide layer 22 is not provided. Similar to the light transmission layer 14, the light transmission layer 23 is a layer having a lower refractive index than the second light guide layer 21 and the second display light guide layer 22.
  • the light transmissive layer 23 is composed of the same material as the light transmissive layer 14 and is, for example, an air layer.
  • the first display light guide layer 13 and the second display light guide layer 22 are arranged so that a part thereof overlaps in the front-rear direction (Z direction).
  • the first light guide layer 11 and the second light guide layer 21 are formed of the same synthetic resin sheet, and the first display light guide layer 13 and the second display light guide layer 22 are made of the same material and have the same structure.
  • the illumination display device 1 can be configured as a laminated body of upper and lower target sheets, which facilitates manufacture.
  • a light emitting diode 24 as a second light source is opposed to an end surface 21 c facing the right side of the second light guide layer 21.
  • the light emitted from the light emitting diode 24 enters the second light guide layer 21 from the end face 21c.
  • the right end portions of the first light guide layer 11 and the light scattering layer 12 are covered with a mask 25, and the light emitted from the light emitting diode 24 directly enters the first light guide layer 11 and the light scattering layer 12. I try not to enter.
  • the illuminated display device 1 can illuminate the first display shown in FIG. 2A by turning on the light-emitting diode 15 as the first light source and turning off the light-emitting diode 24 as the second light source. .
  • the light emitted from the light emitting diode 15 enters the inside of the first light guide layer 11 from the end face 11c. Most of the light component L1 incident on the inside of the first light guide layer 11 is reflected on the boundary surface between the front surface 11a and the external air layer, and on the boundary surface between the back surface 11b and the light transmission layer (air layer) 14. The light is reflected and propagates inside the first light guide layer 11. However, the boundary between the first light guide layer 11 and the first display light guide layer 13 has substantially no difference in refractive index, or the difference is slight. Part of the light component L1 propagating through the light enters the first display light guide layer 13 and is reflected as scattered light L2 by the light scattering layer 12 in close contact with the first display light guide layer 13. . The scattered light L2 reflected by the light scattering layer 12 passes only through the first display light guide layer 13, passes through the first light guide layer 11, and exits forward (in the Z1 direction).
  • Scattered light L2 reflected by the light scattering layer 12 is led forward only from the region where the first display light guide layer 13 and the light scattering layer 12 are in close contact.
  • the region where the first display light guide layer 13 and the light scattering layer 12 are in close contact with each other is formed to be a pattern of the numeral “8” as shown in FIG. Therefore, from the front, the number “8” is brightly illuminated as the first display and can be visually observed.
  • the light emitted from the light emitting diode 15 is white light and the light scattering layer 12 is white or milky white
  • “8” in the first display is illuminated and displayed as a white pattern.
  • the first display When the light emitted from the light emitting diode 15 is white light and the light scattering layer 12 has a hue that is colored such as red or blue, “8” in the first display is illuminated as a colored pattern. Is displayed. When the light emitted from the light emitting diode 15 is red or blue chromatic light and the light scattering layer 12 is white or milky white, “8” in the first display is illuminated as a pattern having the same color as the chromatic color of light. Is displayed.
  • the light emitted from the light emitting diode 24 enters the second light guide layer 21 from the end face 21c. Inside the second light guide layer 21, the light is guided by the second light guide due to the refractive index difference between the front surface 21 a and the light transmission layer (air layer) 23 and the refractive index difference between the back surface 21 b and the external air layer. It is reflected toward the inside of the optical layer 21 and propagates as a light component La.
  • the boundary between the second light guide layer 21 and the second display light guide layer 22 has no difference in refractive index or a slight difference in refractive index, the inside of the second light guide layer 21 A part of the light component La propagating in the light enters the second display light guide layer 22, and transmits the light scattering layer 12 from the back surface 12b toward the front surface 12a. The light transmitted through the light scattering layer 12 becomes scattered light.
  • the component Lb of a part of the scattered light transmitted through the light scattering layer 12 is transmitted through the first display light guide layer 13 and the first light guide layer 11 and emitted forward (Z1 direction).
  • the other component Lc of the scattered light passes through the light transmission layer 14 and the first light guide layer 11 and is emitted forward.
  • the region where light is transmitted through the inside of the light scattering layer 12 and becomes scattered light is only the region where the second display light guide layer 22 and the light scattering layer 12 are in close contact with each other.
  • the region where the second display light guide layer 22 and the light scattering layer 12 are in close contact with each other has a pattern shape representing the second display content as shown in FIG. “A” is displayed brightly illuminated as the second display.
  • the number “8”, which is the first display shown in A), is hardly visible from the front.
  • the shape of the first display shown in FIG. 2A depends on the pattern of the region where the light scattering layer 12 and the first display light guide layer 13 are in close contact
  • the second display shown in FIG. The shape of the display depends on the pattern of the area where the light scattering layer 12 and the second display light guide layer 22 are in close contact with each other.
  • the first display light guide layer 13 only serves to guide the scattered light formed in the pattern to the first light guide layer 11.
  • the shape of 13 does not greatly affect the light traveling state. Therefore, when the light emitting diode 24 is lit without the light emitting diode 15 being lit, the Roman character “A” as the second display shown in FIG. 2B looks bright from the front, but in FIG. The number “8”, which is the first display shown, is hardly visible.
  • the first display content is determined by the planar shape of the first display light guide layer 13
  • the second display content is determined by the planar shape of the second display light guide layer 22.
  • the Roman letter “A” as the second display can be displayed in various hues.
  • the second display can be displayed with light of different hues.
  • the first light guide layer 11 and the second light guide layer 21 are flexible synthetic resin sheets, and the light scattering layer 12 is also flexible. Therefore, a switch mechanism is provided below the illuminated display device 1, and a switch located below the region where the first display light guide layer 13 and the second display light guide layer 22 are provided is pressed with a finger. The mechanism can be operated.
  • a transparent touch panel may be disposed in front of the surface 11 a of the first light guide layer 11 of the illuminated display device 1 so that the touch panel can be operated while viewing the illumination content from the illuminated display device 1.
  • the transparent touch panel is a capacitance type panel that detects a difference in capacitance between electrodes when a finger approaches, and specifies coordinates of a position where the finger contacts.
  • the flexible insulating sheets face each other across the space, a transparent resistor layer is formed on the facing parts of the upper and lower insulating sheets, and the position where the insulating sheets contact each other when pressed by a finger It can be detected by change.
  • the center of the first display light guide layer 13 and the center of the second display light guide layer 22 are arranged so as to be shifted to the left and right in the drawing,
  • the first display of the character “8” illuminated by the optical layer 13 and the second display of the character “A” illuminated by the second display light guide layer 22 are shifted from each other to the left and right. Only the parts overlap.
  • the center of the first display light guide layer 13 and the center of the second display light guide layer 22 are substantially matched, so that the first display light guide layer is aligned.
  • the center of the first display of the character “8” illuminated at 13 and the center of the character “A” illuminated at the second display light-guiding layer 22 substantially coincide with the center of the second display.
  • FIG. 4 is a side view showing the illuminated display device 101 according to the second embodiment of the present invention.
  • the illuminated display device 101 includes a reflective display unit 2A and a light sending unit 3A below it.
  • the first light guide layer 111 and the first display light guide layer 113 are integrally formed, and the first display light guide layer 113 is formed from the lower surface of the first light guide layer 111. It protrudes downward.
  • the first lead is formed by a so-called imprint method in which a liquid synthetic resin is supplied to the surface of the substrate in which the planar pattern of the first display light guide layer 113 is formed in the recess, is cured with ultraviolet light, and is peeled off from the substrate.
  • the optical layer 111 and the first display light guide layer 113 can be integrally formed.
  • the first display light guide layer 113 is formed in a planar pattern such as letters, numbers, symbols, and the like that are the first display as shown in FIG.
  • the first display light guide layer 113 and the light scattering layer 12 are fixed by a translucent adhesive layer 113a.
  • the second light guide layer 121 and the second display light guide layer 122 are integrally formed by the imprint method, and the second display light guide layer 122 protrudes upward.
  • the second display light guide layer 122 is formed in a planar pattern such as letters, numbers, symbols, and the like that are to be a second display as shown in FIG.
  • the second display light guide layer 122 and the light scattering layer 12 are fixed by a translucent adhesive layer 122a.
  • a light transmission layer 114 having a low refractive index such as air is formed.
  • a light transmission layer 123 having a low refractive index such as air is formed.
  • FIG. 5 shows an illuminated display device 201 according to the third embodiment of the present invention.
  • the illuminated display device 201 includes a reflective display unit 2 and a light sending unit 3B behind it.
  • the first light guide layer 11, the light scattering layer 12, the first display light guide layer 13 and the light transmission layer 14 constituting the reflective display unit 2 have the same structure as the reflective display unit 2 shown in FIG.
  • the light transmission unit 3B has a third light guide layer 221.
  • the third light guide layer 221 is a flexible and translucent synthetic resin sheet formed of the same polyurethane resin or the like as the first light guide layer 111.
  • a light emitting diode 24 is provided on the right side of the third light guide layer 221, and light emitted from the light emitting diode 24 enters the third light guide layer 221.
  • the light shielding layer 224 is opposed to the surface 221a of the third light guide layer 221 through a light transmission layer 223 having a low refractive index such as an air layer.
  • the light shielding layer 224 is a coating film or a printing film formed on the lower surface of the light scattering layer 12.
  • a transparent sheet may be disposed between the third light guide layer 221 and the light scattering layer 12, and the light shielding layer 224 may be formed on the transparent sheet.
  • the light shielding layer 224 restricts light propagating through the third light guide layer 221 from leaking forward from the surface 221a.
  • a part of the light shielding layer 224 is removed, and the removed part serves as a pattern forming unit 225.
  • the pattern forming portion 225 has a pattern shape such as characters, numbers, or symbols that are the second display as shown in FIG.
  • a reflection part 226 is provided below the pattern formation part 225.
  • the reflection part 226 is formed by forming fine irregularities on the back surface 221 b of the third light guide layer 221.
  • a resin layer or a metal reflective layer in which a white filler is mixed is formed on the back surface 221b.
  • the illuminated display device 201 shown in FIG. 5 has a first display as shown in FIG. 2A according to the pattern of the first display light guide layer 13.
  • the display is illuminated.
  • the light emitting diode 15 is turned off and the light emitting diode 24 is turned on, the light propagates through the third light guide layer 221, is reflected by the reflecting portion 226, and is emitted forward from the pattern forming portion 225.
  • the light emitted forward (Z1 direction) from the pattern forming unit 225 passes through the light scattering layer 12 and becomes scattered light, passes through the first display light guide layer 13 and the light transmission layer 14, and further passes through the first display light guide layer 13 and the light transmission layer 14.
  • the light is transmitted through the light guide layer 11 and emitted forward.
  • the scattered light that has passed through the light scattering layer 12 is emitted as light that displays the shape of the pattern forming portion 225, it corresponds to the pattern of the pattern forming portion 225 in the same manner as shown in FIG.
  • the second display can be illuminated.
  • the reflective portion 226 may be a pattern of letters, numbers, symbols, or figures, and the reflective portion 226 may be a pattern forming portion.
  • letters, numbers, and the like expressed by the pattern of the reflective portion 226 are transmitted through the light scattering layer 12 to be scattered light, transmitted through the first display light guide layer 13 and the light transmission layer 14, and The light passes through the first light guide layer 11 and exits forward.
  • FIG. 6 shows an illuminated display device 301 according to a third embodiment of the present invention.
  • the reflective display unit 2 is the same as that shown in FIGS. 1 and 5, and is provided with a first light guide layer 11, a first display light guide layer 13, and a light emitting diode 15 as a first light source. ing.
  • the light sending section 3C has the same third light guide layer 221 as the embodiment shown in FIG. 5, and the light emitting diode 24 as the second light source faces the end face.
  • An auxiliary layer 321 faces the surface 221a of the third light guide layer 221 with a light transmission layer 223 such as an air layer interposed therebetween.
  • the auxiliary layer 321 is a transparent synthetic resin sheet having substantially the same refractive index as that of the third light guide layer 221.
  • a light shielding layer 224 is formed on the surface 321a of the auxiliary layer 321. The light shielding layer 224 is partially removed in a character or symbol pattern to form a pattern forming portion 225.
  • a light scattering layer 312 is partially provided on the surface 321 a of the auxiliary layer 321.
  • the light scattering layer 312 is formed so as to cover the pattern forming portion 225 and is provided in close contact with the first display light guide layer 13. Further, the back surface 221b of the third light guide layer 221 is provided with the same reflecting portion 226 as shown in FIG.
  • the first display is illuminated according to the pattern of the first display light guide layer 13.
  • the light emitting diode 24 is turned on without turning on the light emitting diode 15
  • the light propagates through the third light guide layer 221, is reflected by the reflecting portion 226, and passes through the light transmitting layer 223 and the auxiliary layer 321.
  • the light passes through the pattern forming unit 225 and passes through the light scattering layer 312 while being scattered.
  • the second display corresponding to the pattern shape of the pattern forming unit 225 is illuminated.
  • the light scattering layer 312 shown in FIG. 6 is formed by coating a light-transmitting resin film that exhibits a function of scattering light with an internal structure by means such as printing or painting. Since the light scattering layer 312 is thin, the illumination display device 301 can be configured to be thin. Further, by adjusting the internal structure of the light scattering layer 312, for example, by changing the concentration of the filler that scatters light, or by changing the thickness of the light scattering layer 312, the degree of light scattering can be changed. The brightness and brightness of the first display and the second display can be adjusted.
  • a plurality of first display light guide layers 13 and a plurality of pattern forming portions 225 are provided between the first light guide layer 11 and the third light guide layer.
  • the scattering degree of the light scattering layer 312 is determined depending on the distance from a light source such as the light emitting diode 15 or the light emitting diode 24. By changing it accordingly, it is possible to reduce variations in luminance of each display.
  • the reflectance of the reflection part 226 changes the size and density of the unevenness formed on the back surface 221b of the third light guide layer 221, changes the concentration of the filler in the resin layer superimposed on the back surface 221b, or becomes a metal layer. This can be achieved by changing the metal material.
  • the light transmission layer 23 is a resin layer having a low refractive index, and the first display light guide layer 13 and the second display light guide layer 22 are provided. In addition, it is also possible to partially form a light scattering layer on the surfaces of the light transmission layer 23 and the second display light guide layer 22.
  • FIG. 7 shows an illuminated display device 401 according to the fourth embodiment of the present invention
  • FIG. 8 shows an illuminated display device 501 according to the fifth embodiment of the present invention. These two embodiments are based on the structure of the illumination display device 201 shown in FIG. 5 and enable display of chromatic colors using the light emitting diodes 15 and 24 that emit white light.
  • a color filter layer 410 is disposed between the third light guide layer 221 and the light shielding layer 224.
  • the color filter layer 410 is colored by mixing a pigment in a transparent resin and is translucent.
  • the first display is illuminated according to the pattern of the first display light guide layer 13.
  • the illumination at this time becomes the hue of the light diffusion layer 12.
  • the light emitting diode 24 is turned on without emitting the light emitting diode 15 and white light is emitted, the light passes through the color filter layer 410 and the light diffusing layer 12, and therefore the second light corresponding to the pattern of the pattern forming unit 225. Is displayed in a color in which the hues of the color filter layer 410 and the light diffusion layer 12 are mixed.
  • the light diffusion layer 12 is preferably an achromatic color such as white.
  • the color filter layer 511 is provided on the first light guide layer 11, and the color filter layer 512 is provided on the third light guide layer 221.
  • White light emitted from the light emitting diode 15 passes through the color filter layer 511 and propagates through the first light guide layer 11 as chromatic light. Therefore, the first display is displayed in a color in which the hue of the color filter layer 511 and the hue of the light scattering layer 12 are mixed.
  • the second display is displayed in a color in which the hue of the color filter layer 512 and the hue of the light scattering layer 12 are mixed. Therefore, the light scattering layer 12 is preferably achromatic.
  • the first display and the second display can be displayed in different colors by making the hues of the color filter layers 511 and 512 different.
  • FIG. 9 shows an illuminated display device 601 according to a sixth embodiment of the present invention.
  • the illuminated display device 601 includes a reflective display unit 2 and a light sending unit 3D behind the reflective display unit 2.
  • the first light guide layer 11, the light scattering layer 12, the first display light guide layer 13 and the light transmission layer 14 constituting the reflective display unit 2 have the same structure as the reflective display unit 2 shown in FIG.
  • the light sending unit 3D is provided with a light emitting unit 621 having a light source such as a light emitting diode inside.
  • the light emitting surface 622 facing the front of the light emitting unit 621 is provided with a light emitting slit having a pattern corresponding to the second display such as letters, numbers or symbols.
  • the illuminated display device 601 shown in FIG. 9 has a first display as shown in FIG. 2A according to the pattern of the first display light guide layer 13 when the light emitting diode 15 is turned on and the light emitting portion 621 is turned off. Is illuminated and displayed.
  • the light emitting diode 15 is turned off and the light emitting unit 621 is turned on, the light of the second display pattern emitted from the light emitting surface 622 passes through the light scattering layer 12 and becomes scattered light, and the first display light guide layer. 13 and the light transmission layer 14, and further passes through the first light guide layer 11 to be emitted forward.
  • the light emitting unit 621 may include a surface light source such as an electroluminescence element and emit light of a second display pattern.
  • FIG. 10 shows a modification of the reflective display unit 2.
  • a light scattering layer 12 having an uneven surface is provided behind the back surface 11 b of the first light guide layer 11 so as to be optically separated from the first light guide layer 11. Since the surface of the light scattering layer 12 has irregularities, an air layer is formed between the light guide layer 11 and the light scattering layer 12, and the light propagating through the light guide layer 11 by being optically separated is light scattered. The layer 12 can propagate almost unaffected.
  • the first display light guide layer 13 is formed as a layer welded at the interface between the light guide layer 11 and the light scattering layer 12.
  • Such a display light guide layer 13 is obtained by melting at least one layer at the interface between the light guide layer 11 and the light scattering layer 12 by, for example, performing laser irradiation after the light guide layer 11 and the light scattering layer 12 are overlaid. It can be formed by integrating them. Since the light guide layer 11 and the light scattering layer 12 are partially optically coupled by the display light guide layer 13 as described above, the light propagated through the light guide layer 11 is the display light guide layer as in the embodiment of FIG. It is scattered from the light-scattering layer 12 only in the part in which 13 was formed, and the 1st display of the shape of the display light guide layer 13 can be displayed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Push-Button Switches (AREA)
PCT/JP2010/058182 2009-05-15 2010-05-14 照光表示装置 WO2010131735A1 (ja)

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JP2011513383A JP4979835B2 (ja) 2009-05-15 2010-05-14 照光表示装置

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CN102330925A (zh) * 2011-06-01 2012-01-25 友达光电股份有限公司 背光模块
CN105719576A (zh) * 2014-12-23 2016-06-29 三星电子株式会社 电器
JP2018081213A (ja) * 2016-11-17 2018-05-24 パナソニックＩｐマネジメント株式会社 表示装置
JP2020003569A (ja) * 2018-06-26 2020-01-09 パナソニックＩｐマネジメント株式会社 突板を用いた表示装置
DE102021104330A1 (de) 2021-02-23 2022-08-25 Bayerische Motoren Werke Aktiengesellschaft Anwenderschnittstelle, Fortbewegungsmittel sowie Lenkrad für ein Fortbewegungsmittel mit transparenter Anzeigeeinrichtung

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JP6532059B2 (ja) * 2015-08-05 2019-06-19 アルプスアルパイン株式会社 照光表示装置の製造方法
CN105551400B (zh) * 2015-12-07 2018-06-01 联想(北京)有限公司 一种电子设备的发光模组及其制作方法
KR102449562B1 (ko) * 2017-11-27 2022-10-07 현대모비스 주식회사 자동차 내장부품용 투광성 부재

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CN102330925A (zh) * 2011-06-01 2012-01-25 友达光电股份有限公司 背光模块
CN102330925B (zh) * 2011-06-01 2013-08-14 友达光电股份有限公司 背光模块
CN105719576A (zh) * 2014-12-23 2016-06-29 三星电子株式会社 电器
JP2018081213A (ja) * 2016-11-17 2018-05-24 パナソニックＩｐマネジメント株式会社 表示装置
JP2020003569A (ja) * 2018-06-26 2020-01-09 パナソニックＩｐマネジメント株式会社 突板を用いた表示装置
JP7054808B2 (ja) 2018-06-26 2022-04-15 パナソニックＩｐマネジメント株式会社 突板を用いた表示装置
DE102021104330A1 (de) 2021-02-23 2022-08-25 Bayerische Motoren Werke Aktiengesellschaft Anwenderschnittstelle, Fortbewegungsmittel sowie Lenkrad für ein Fortbewegungsmittel mit transparenter Anzeigeeinrichtung
WO2022179657A1 (de) 2021-02-23 2022-09-01 Bayerische Motoren Werke Aktiengesellschaft Anwenderschnittstelle, fortbewegungsmittel sowie lenkrad für ein fortbewegungsmittel mit transparenter anzeigeeinrichtung

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CN102356421A (zh) 2012-02-15
JP4979835B2 (ja) 2012-07-18

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