EP2942769A1 - Anzeigevorrichtung - Google Patents

Anzeigevorrichtung Download PDF

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Publication number
EP2942769A1
EP2942769A1 EP15163783.2A EP15163783A EP2942769A1 EP 2942769 A1 EP2942769 A1 EP 2942769A1 EP 15163783 A EP15163783 A EP 15163783A EP 2942769 A1 EP2942769 A1 EP 2942769A1
Authority
EP
European Patent Office
Prior art keywords
light sources
display device
partitioning wall
led light
light
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP15163783.2A
Other languages
English (en)
French (fr)
Inventor
Nobuaki Hayashi
Tadashi Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuroi Electric Co Ltd
Original Assignee
Kuroi Electric 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 Kuroi Electric Co Ltd filed Critical Kuroi Electric Co Ltd
Publication of EP2942769A1 publication Critical patent/EP2942769A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/16—Advertising or display means not otherwise provided for using special optical effects involving the use of mirrors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
    • G09F27/008—Sun shades, shades, hoods or louvres on electronic displays to minimise the effect of direct sun light on the display
    • 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
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Definitions

  • the present invention relates to a display device that displays an image and/or picture by means of light emitted from a plurality of light sources.
  • LEDs light emitting diodes
  • a lighting system that obtains an illuminating light by projecting the light from the light sources toward a front side, it is required to distribute an amount of light as uniformly as possible over an entire area of a predetermined range.
  • the lighting systems are provided with various kinds of reflector plates that control distribution directions of the light from each of the LEDs.
  • the reflector plates are disposed in such a manner as to surround peripheral sides of the respective LEDs, and are provided with reflecting surfaces of high reflectivity that are inclined so as to reflect the light emitted from the respective LEDs to the front side.
  • the light emitted from each LED is distributed to the front side of the lighting system either directly or after having been reflected by the reflecting surface(s) of the reflector plate(s).
  • the reflecting surfaces of the reflector plates are each configured so as to reflect the amount of light emitted from each of the LEDs as uniformly as possible over their respective entire surfaces, thereby giving the respective entire surfaces a look of brightness with a homogeneous gradation when viewed directly.
  • the present invention is directed to providing a display device capable of giving gradations to the light projected from each of a plurality of light sources and thereby capable of improving a rendering functionality through the creation of a feeling of depth when viewed directly.
  • a display device of the present invention includes a plurality of light sources and a partitioning wall.
  • the plurality of light sources are arranged in a same plane with light distribution directions of the light sources being directed toward a front side.
  • the partitioning wall has a certain length along a normal line direction of the plane, and separates the plurality of light sources from each other.
  • a surface of the partitioning wall causes light emitted from each of the plurality of light sources to be reflected and diffused in a state of being given gradations such that an amount of light gradually decreases as a distance from the plane increases along the normal line direction.
  • a display device 10 includes a mounting plate 1 and a partitioning wall 2.
  • the mounting plate 1 is a flat plate having a predetermined area.
  • the partitioning wall 2 is an areal lattice consisting of a plurality of cells 23 having a rectangular cross section which are formed by combining two groups of a plurality of strip plates 21, 22 that are disposed on a front face's side of the mounting plate 1 so as to be respectively parallel to two directional lattice axes orthogonal to each other in a plane.
  • the strip plates 21, 22 are made of a material of low reflectivity such as wood or the like.
  • the partitioning wall 2 can be installed either by having a rear face thereof stuck fast onto a front face of the mounting plate 1, or with a predetermined gap between each other.
  • the strip plates 21, 22 it is sufficient that at least a face thereof located on an inside of the cell 23 has a low reflectivity; therefore, with an application of a surface roughing process or sheet sticking process onto the face located on the inside of the cell 23, the strip plates 21, 22, may be made using a material of high reflectivity, other than wood or the like.
  • a plurality of LED light sources 11 are arranged at respective lattice points of an imaginary two-dimensional lattice of which two directional lattice axes are parallel to the strip plates 21, 22, respectively.
  • the two-dimensional lattice at which points the LED light sources 11 are arranged is displaced in relation to the areal lattice of the partitioning wall 2 along the respective directions of the two lattice axes.
  • Each of the plurality of LED light sources 11 is provided with a lens on a front side of a LED element that is mounted on a substrate, and therewith projects the light emitted by the LED element toward a generally hemispheric range on the front side of the substrate.
  • the LED light source 11 corresponds to a light source of the present invention.
  • Each of a plurality of light sources of the present invention does not necessarily consist of a single LED light source, but may consist of a plurality of LED light sources; also, other light emitting component(s) may be used.
  • the plurality of LED light sources 11 are each located at a central part of a cell 23 of the partitioning wall 2 with respect to directions of the front face of the mounting plate 1. Additionally, the plurality of LED light sources 11, provided that each thereof is located separately inside each cell 23, may be located at respective positions that are displaced from the central parts of the plurality of cells 23 with respect to the directions of the front face of the mounting plate 1.
  • the positioning wall 2 separates the plurality of LED light sources 11 from each other.
  • the display device 10 is viewed from the front side in a state where the plurality of LED light sources 11 are turned on, the light emitted by LED light sources 11 that are near the eye position in front view is viewed directly whereas the light emitted by LED light sources 11 that are away from the eye position in front view is viewed after having been reflected by inner faces 23A of respective cells 23.
  • the inner face 23A of each cell 23 is designed so that reflexivity thereof decreases with respect to a direction of a normal line of the front face of the mounting plate 1, and thereby an amount of light reflected by the inner face 23A becomes more the closer to a back side where the LED light source 11 is located, and becomes less the closer to a near side from which the LED light source 11 is more distant. Therefore, the light of the LED light source 11 is viewed, as light being brighter the closer to the back side and darker the closer to the near side on the inner face 23A, in a state of being given gradations by the inner face 23A.
  • a display device 110 includes a partitioning wall 120 of which length (depth) in the direction of the normal line of the front face of the mounting plate 1 is partially different.
  • the partitioning wall 120 has five left rows of cells 1232 and five right rows of cells 1233 of which depth is larger than that of central cells 1231. Therewith it is possible to change stereoscopic effect of an image between the left and right parts and the central part of the partitioning wall.
  • the plurality of LED light sources 11 that are respectively disposed inside a plurality of cells 1231, a plurality of cells 1232, and a plurality of cells 1233, it is also possible to give the images stereoscopic effects that depend on the contents. Moreover, it is also possible to use the display device 110 as one that can produce a feeling of depth with a quality different from the ordinary lighting systems.
  • the way of having partially different depths in the partitioning wall 120 is not limited to what is shown in Fig. 4 , but can have partially different depths in vertical direction or have partially different depths in both right-and-left and vertical directions.
  • a display device 210 includes a semitransparent sheet 230 disposed on a front face of a partitioning wall 220.
  • a display device 310 according to a fourth embodiment of the present invention includes a gap provided between the front face of the mounting plate 1 and a rear face of a partitioning wall 320, and the semitransparent sheet 230 disposed on the rear face of the partitioning wall 320.
  • the display devices 210 and 310 it is possible not only to mitigate the visibility of images of the light sources but to give stereoscopic effects to planar images.
  • the sheet 230 disposed on the front face of the partitioning wall 220 can prevent the cells 223 from being soiled by dust; thus the sheet 230 may be transparent if only for the purpose of obtaining this effect.
  • cells 323 of the partitioning wall 320 can be made to have circular cross sections; or as shown in Fig. 6B , cells 423 can be made to have polygonal cross sections such as hexagon or the like.
  • the plurality of LED light sources 11 are arranged on respective lattice points of an imaginary two-dimensional lattice of which two directional lattice axes for arranging the plurality of LED light sources 11 are respectively rotated at predetermined angles.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
EP15163783.2A 2014-04-24 2015-04-16 Anzeigevorrichtung Withdrawn EP2942769A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014090210A JP6182716B2 (ja) 2014-04-24 2014-04-24 ディスプレイ装置

Publications (1)

Publication Number Publication Date
EP2942769A1 true EP2942769A1 (de) 2015-11-11

Family

ID=53264453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163783.2A Withdrawn EP2942769A1 (de) 2014-04-24 2015-04-16 Anzeigevorrichtung

Country Status (2)

Country Link
EP (1) EP2942769A1 (de)
JP (1) JP6182716B2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020151604A1 (zh) * 2019-01-24 2020-07-30 深圳光峰科技股份有限公司 Led显示屏

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018084215A1 (ja) * 2016-11-02 2018-05-11 国立大学法人徳島大学 表示装置及び画素ユニット
WO2024090393A1 (ja) * 2022-10-27 2024-05-02 国立大学法人徳島大学 球状表示装置、球状表示装置の製造方法及び設計方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1026943A (ja) * 1996-07-11 1998-01-27 Matsushita Electric Ind Co Ltd 画像表示装置
US20030058643A1 (en) * 2001-09-25 2003-03-27 James Barlow Apparatus and method for light absorbing
WO2004053817A1 (en) * 2002-12-10 2004-06-24 Textmate Limited A highway display
KR20090004555U (ko) * 2007-11-09 2009-05-13 이정희 엘이디 모듈이 장착된 영상장비용 전광판
JP2013098083A (ja) 2011-11-02 2013-05-20 Panasonic Corp 照明器具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07261674A (ja) * 1994-03-18 1995-10-13 Takiron Co Ltd 遮光用格子付き表示装置
US8890905B2 (en) * 2009-08-18 2014-11-18 Dolby Laboratories Licensing Corporation Reflectors with spatially varying reflectance/absorption gradients for color and luminance compensation
JP5360994B2 (ja) * 2009-11-10 2013-12-04 パナソニック株式会社 照明器具
JP5557156B2 (ja) * 2010-09-17 2014-07-23 株式会社三洋物産 遊技機
JP5816908B2 (ja) * 2011-01-17 2015-11-18 株式会社オプトデザイン Ｌｅｄ光源装置及びこの光源装置を用いた照明装置
JP2013115150A (ja) * 2011-11-25 2013-06-10 Kyocera Corp 発光装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1026943A (ja) * 1996-07-11 1998-01-27 Matsushita Electric Ind Co Ltd 画像表示装置
US20030058643A1 (en) * 2001-09-25 2003-03-27 James Barlow Apparatus and method for light absorbing
WO2004053817A1 (en) * 2002-12-10 2004-06-24 Textmate Limited A highway display
KR20090004555U (ko) * 2007-11-09 2009-05-13 이정희 엘이디 모듈이 장착된 영상장비용 전광판
JP2013098083A (ja) 2011-11-02 2013-05-20 Panasonic Corp 照明器具

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020151604A1 (zh) * 2019-01-24 2020-07-30 深圳光峰科技股份有限公司 Led显示屏

Also Published As

Publication number Publication date
JP6182716B2 (ja) 2017-08-23
JP2015210317A (ja) 2015-11-24

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