EP0206176A2 - Matrice à guides optiques pour une enseigne lumineuse à matrice de points - Google Patents

Matrice à guides optiques pour une enseigne lumineuse à matrice de points Download PDF

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Publication number
EP0206176A2
EP0206176A2 EP86108122A EP86108122A EP0206176A2 EP 0206176 A2 EP0206176 A2 EP 0206176A2 EP 86108122 A EP86108122 A EP 86108122A EP 86108122 A EP86108122 A EP 86108122A EP 0206176 A2 EP0206176 A2 EP 0206176A2
Authority
EP
European Patent Office
Prior art keywords
luminous
display
matrix
dot
section
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.)
Granted
Application number
EP86108122A
Other languages
German (de)
English (en)
Other versions
EP0206176A3 (en
EP0206176B1 (fr
Inventor
Akiharu C/O Takiron Co. Ltd. Takeichi
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.)
Takiron Co Ltd
Original Assignee
Takiron 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
Priority claimed from JP1985099248U external-priority patent/JPH0328460Y2/ja
Priority claimed from JP10345685U external-priority patent/JPH0241661Y2/ja
Application filed by Takiron Co Ltd filed Critical Takiron Co Ltd
Publication of EP0206176A2 publication Critical patent/EP0206176A2/fr
Publication of EP0206176A3 publication Critical patent/EP0206176A3/en
Application granted granted Critical
Publication of EP0206176B1 publication Critical patent/EP0206176B1/fr
Expired - Fee Related 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
    • 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 improvements in dot-matrix luminous displays constructed of luminous elements such as light-emitting diodes.
  • Luminous displays of this type are designed to provide a visible representation of characters, symbols or patterns in the form of a dot pattern by supplying power to and lighting selected luminous elements arranged in a matrix using driving circuits.
  • the basic structure of such a conventional dot-matrix luminous display includes upper and lower electrodes arranged in a three-dimensional matrix with an insulating layer sandwiched therebetween, and semiconductor chips disposed at intersections between the upper and lower electrodes.
  • a dot-matrix luminous display Two sheets of insulating substrates 102 and 103, respectively, bearing parallel rows of upper electrodes 100 and lower electrodes 101 on their surfaces, are fixed together to form a matrix luminous display board (hereinafter referred to as simply a "display board") 1 with the upper electrodes 100 placed perpendicular to the lower electrodes 101 to form a three-dimensional matrix at their intersections. There are provided through-holes 104 in the insulating substrate 102 at portions where the upper and lower electrodes 100 and 101 intersect.
  • a matrix luminous display board hereinafter referred to as simply a "display board”
  • a semiconductor chip 105 forming a single luminous element, is placed in each through-hole 104, and, as a final process, the entire surface of the matrix board 1, including the through-holes 104 through which the semiconductor chips 105 are exposed, is coated with a light transmitting thermosetting resin to provide thereby a continuous protective film 107 as shown in Fig. 2.
  • bonding wires 106 are used to connect the semiconductor chips 105 to the upper electrodes 100, whereas solder or silver paste 108 is used to provide conductive connection between the bottoms of the semiconductor chips 105 and the lower electrodes 101.
  • strains such as strain there may be produced strain, camber, peeling and cracks (hereinafter collectively referred to as "flaws such as strain") at the joints of the display board 1 and the protective film 107 because of the difference therebetween in the coefficient of thermal expansion. These flaws such as strain result in defective products.
  • the flaws such as strain become more pronounced as the size of the display board 1 is increased. Even finished products are not free from such strain caused by, for instance, the temperature difference between summer and winter or heat generated when power is supplied to the luminous elements.
  • the dot matrix luminous display be composed, as shown in Figs. 3 and 4, of a dot matrix luminous display board having luminous elements 105 arranged at intersections between upper and lower electrodes 100 and 101 arranged in a three-dimensional matrix on opposite sides of an insulating layer 110 as a preferred embodiment.
  • the lower electrodes 101 are electrically connected to the upper side of the insulating layer 110 through a through-hole.
  • a flexible plate 2 having a plurality of through-holes formed therein at locations corresponding to the luminous elements 105 is joined to the surface of the dot matrix luminous display board.
  • Fig. 3 is a schematic exploded view of a matrix display board 1 and a flexible plate 2 illustrating a dot-matrix luminous display proposed in the copending U.S. patent application wherein through-holes 200 are formed in the flexible plate 2.
  • Fig. 4 is an enlarged cross-sectional view illustrating the dot-matrix luminous display of Fig. 3, in which the same or corresponding members as shown in Figs. 1 and 2 bear the same reference numerals, respectively.
  • the flexible plate 2 is made from a material such as silicon rubber, neoprene rubber and flexible epoxy resin. Further, the through-holes 200 of the flexible plate 2 are filled with a light transmitting resin 107 to increase a visual angle of recognition and to enlarge the apparent luminous parts.
  • an object of the present invention is to provide a dot-matrix luminous display capable of increasing an apparent diameter of luminous parts and of making the contour thereof more clear to thereby improve the visual recognizability.
  • Another object of the present invention is to provide a dot-matrix luminous display capable of preventing the diffusion of light into an undesired area and of concentrating the light radiated from luminous parts in a desired given area.
  • a dot-matrix luminous display which comprises a dot-matrix luminous display board having luminous elements arranged at electrical intersections between upper and lower electrodes arranged in a three-dimensional matrix with an insulating layer sandwiched therebetween.
  • a flexible plate having a plurality of through-holes formed therein at locations corresponding to the luminous elements is joined to the surface of the display board.
  • Each of the through-holes has a trapezoidal cross-section so that top cross-section of the aperture is larger than a bottom cross-section which is in contact with the display board and each of the through-holes is filled with a light transmitting resin.
  • Fig. 5 is an enlarged cross-sectional view illustrating a first example of a luminous part of a dot-matrix luminous display embodying the present invention.
  • the first example of the present invention which is shown in Fig. 5, is substantially the same as that shown in Fig. 4 but there is a difference therebetween in that a light transmitting resin seal 107 has a concave surface and a light dispersing agent may be also added thereto, if necessary.
  • the flexible member 2 having a plurality of through-holes 200 is jointed onto the display board 1 with an adhesive, and then a light transmitting resin is injected into the through-holes 200 to seal the luminous elements 105 and the like and to form a seal 107 in each of the through-holes 200.
  • a light transmitting resin seal 107 has a concave surface and a light dispersing agent may be also added thereto, if necessary.
  • the flexible member 2 having a plurality of through-holes 200 is jointed onto the display board 1 with an adhesive, and then a light transmitting resin is injected into the through-holes 200 to seal the luminous elements 105 and the like and to form a seal 107 in each of
  • the surface is shaped to have a concave portion so as to fully provide the seal 107 with the so-called concave lens function and a light dispersing agent may be added to the light transmitting resin in order to improve the visual recognizability (a visual angle of recognition).
  • the resin may be, for example, a resin such as epoxy or polyester.
  • the thickness of the seal 107 in its central thin portion should preferably be in the range of about 1/2 to 2/3 of the thickness dm of the flexible plate 2 and the thickness dm of the flexible palte 2 should be about 1/5 to 1/2 of the diameter 2R of the top cross-section (i.e., diameter of the luminous part A), more preferably, about 1/3 of the diameter 2R of the top cross-section.
  • a dot-matrix luminous display with a dot pitch of 8.0 mm (the distance between the centers of adjacent dots) and a side length of the display board of about 64 mm is employed for the present invention, for instance, it is possible to set the diameter 2R of the luminous part at 6.5 mm, the thickness dm of the flexible plate at 2.0 mm and the thickness ds of the display board 1 at 1.6 mm.
  • the flexible plate 2 used for the dot-matrix luminous display is primarily intended to prevent the leakage of light received from the luminous elements 105, to increase the apparent diameter of the luminous part A and to make clear the contour thereof in order to improve the visual recognizability of the dot-matrix luminous display. At the same time, it is used to protect the electrode patterns 100 and 101 on the surface of the display board 1 and to prevent the leakage of resin (for instance, thermosetting or ultraviolet-curing liquid resin) used for sealing the luminous element 105.
  • resin for instance, thermosetting or ultraviolet-curing liquid resin
  • the flexible plate 2 should preferably be made of flexible materials such as neoprene rubber and silicon rubber to prevent crack, deformation and the like caused by cure shrinkage when the light transmitting material is used to form the seal 107 and to prevent bending and deformation as a result of temperature changes.
  • flexible materials have Young's modulus not higher than 100 kg/cm 2.
  • a light reflecting face formed on the inner peripheral wall of the throuh-holes 200 should be formed directly with a light reflecting material - (for instance, a white material) or by coating the wall with a light reflecting material such as a silver paint. It is also preferred to apply a light absorbing dark paint to the top exposed surface of the flexible plate 2 to prevent light from unnecessarily reflecting from it.
  • the seal 107 formed in the luminous part for sealing the luminous element and the like should have specific characteristics.
  • the seal 107 should be composed of a light transmitting material with a relatively high refractive index of 1.3 or higher. It should have a light reflecting face formed on the inner peripheral wall of the through-hole 200 of the flexible plate 2. These properties are useful in that the contour of the luminous part is made clear and visual recognizability is improved.
  • Fig. 6 is an enlarged cross-sectional view illustrating a second example of the luminous part A of a dot-matrix luminous display embodying the present invention, in which the inner peripheral wall of each of the through-holes 200 is shaped with an outwardly opening slope so that a top cross-section of the through-hole has a diameter larger than that of a bottom.
  • Fig. 7 is an enlarged cross-sectional view illustrating a third example of the luminous part A of the present invention.
  • the seal 107 has a concave surface and a light dispersing agent may be also added thereto, if necessary.
  • Fig. 8 is a schematic perspective view of the dot-matrix luminous display whose partial cross-section is shown in Fig. 7.
  • Figs. 9 to 11 are enlarged cross-sectional views illustrating fourth, fifth and sixth examples of the luminous part A of the dot-matrix luminous display of the present invention, respectively.
  • the fourth to sixth examples of the luminous parts A are designed so as to concentrate the light emission from the luminous part A in a given direction, thereby improving the luminance in this direction and improving the visual recognizability.
  • the inner peripheral wall of the through-hole 200 allowing its top opening 200a to communicate with the bottom opening 200b, is preferably coated with paint with a high light reflectance to provide a light reflecting face.
  • the eccentric distance between the cross-section centers in accordance with the present invention can be set at any value depending on the direction of radiation. However, it is preferable that the eccentric distance s between the center RO of the top cross-section 200a and the center r0 of the bottom cross-section 200b be set so as to satisfy the relation R/5 ⁇ s ;$ R/2 where R and r designate radii of the top cross-section 200a and the bottom cross-section 200b.
  • each luminous element 105 in the luminous part A is sealed with a hardening light transmitting resin (for.instance, thermosetting and ultraviolet-curing resin) to form the seal 107, just as in the first to third examples.
  • a hardening light transmitting resin for.instance, thermosetting and ultraviolet-curing resin
  • the concave surface 107a of the seal 107 shown in Fig. 10 may be provided to increase the luminous flux density around the luminous part A due to the function of the concave lens, thus increasing the clarity of the contour of the luminous part A, so that a brighter easy-to-see dot matrix luminous display unit is obtainable.
  • the dot matrix luminous display unit can use not only a dynamic driving circuit is used to light each luminous element but also a driving circuit which capable of lighting luminous elements at the same time.
  • Fig. 12 shows an example of the dot matrix luminous display device used as a display panel and arranged in a high place.
  • An embodiment of the present invention thus arranged brought about good results with an angle of elevation e in the range from 45 to 60 degrees.
  • the centers of the upper and lower openings of each through-hole of the flexible plate are displaced from each other and a light reflecting face is formed on the inner peripheral face of the through-hole allowing the upper opening to communicate with the lower opening. Consequently, the light radiated from the luminous elements is concentrately emitted onto a given irradiation area defined by the eccentricity between the upper and lower openings of the through-hole.
  • the dot matrix luminous display unit when used as a luminous display panel for installation in a high place, it is not only of high commercial value but also very useful.
EP19860108122 1985-06-28 1986-06-13 Matrice à guides optiques pour une enseigne lumineuse à matrice de points Expired - Fee Related EP0206176B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1985099248U JPH0328460Y2 (fr) 1985-06-28 1985-06-28
JP99248/85U 1985-06-28
JP103456/85U 1985-07-05
JP10345685U JPH0241661Y2 (fr) 1985-07-05 1985-07-05

Publications (3)

Publication Number Publication Date
EP0206176A2 true EP0206176A2 (fr) 1986-12-30
EP0206176A3 EP0206176A3 (en) 1987-11-25
EP0206176B1 EP0206176B1 (fr) 1992-01-02

Family

ID=26440399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860108122 Expired - Fee Related EP0206176B1 (fr) 1985-06-28 1986-06-13 Matrice à guides optiques pour une enseigne lumineuse à matrice de points

Country Status (3)

Country Link
EP (1) EP0206176B1 (fr)
DE (1) DE3683195D1 (fr)
HK (1) HK47095A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206444A (en) * 1987-06-10 1989-01-05 Yue Wen Cheng Light emitting diode
GB2225897A (en) * 1988-12-12 1990-06-13 Samsung Electronics Co Ltd An LED array head and a method of making the same
GB2226185A (en) * 1988-12-17 1990-06-20 Samsung Electronics Co Ltd A light emitting apparatus
GB2366900A (en) * 2000-09-13 2002-03-20 Box Consultants Ltd An Illuminated Display Element
WO2002069308A2 (fr) * 2001-02-22 2002-09-06 Hagen Glass Dispositif d'indication
WO2005050598A1 (fr) * 2003-11-14 2005-06-02 Smartslab Limited Systeme d'affichage modulaire
WO2008046241A1 (fr) * 2006-10-11 2008-04-24 Tsungwen Chan Structure de plaque de rétroéclairage comportant des diodes électroluminescentes incorporées et son procédé de fabrication
DE102012100426A1 (de) * 2012-01-19 2013-07-25 Osram Opto Semiconductors Gmbh Anzeigevorrichtung und Verfahren zur Darstellung dreidimensionaler Bilder
WO2015192430A1 (fr) * 2014-06-18 2015-12-23 黄欣 Unités carrées d'écran d'affichage à del
WO2016022323A1 (fr) * 2014-08-08 2016-02-11 Motorola Solutions, Inc. Dispositif d'affichage à diode électroluminescente (del) pour un dispositif de communication portable
CN114770971A (zh) * 2022-04-27 2022-07-22 郑州大学 泡沫填充仿生点阵复合结构及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780357A (en) * 1973-02-16 1973-12-18 Hewlett Packard Co Electroluminescent semiconductor display apparatus and method of fabricating the same
DE2929809A1 (de) * 1978-07-25 1980-02-07 Sanyo Electric Co Anzeigeeinrichtung
WO1980001860A1 (fr) * 1979-03-01 1980-09-04 Amp Inc Panneau d'affichage a diodes emettrices de lumiere
EP0042122A2 (fr) * 1980-06-13 1981-12-23 Kabushiki Kaisha Toshiba Module LED pour un dispositif d'affichage plat
US4345308A (en) * 1978-08-25 1982-08-17 General Instrument Corporation Alpha-numeric display array and method of manufacture
FR2518317A1 (fr) * 1981-12-10 1983-06-17 Licentia Gmbh Reseau plan de diodes electroluminescentes
JPS5967673A (ja) * 1982-10-12 1984-04-17 Toyo Commun Equip Co Ltd 面照明用発光ダイオ−ド
EP0182254A2 (fr) * 1984-11-12 1986-05-28 Takiron Co. Ltd. Matrice à points pour affichage lumineux

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780357A (en) * 1973-02-16 1973-12-18 Hewlett Packard Co Electroluminescent semiconductor display apparatus and method of fabricating the same
DE2929809A1 (de) * 1978-07-25 1980-02-07 Sanyo Electric Co Anzeigeeinrichtung
US4345308A (en) * 1978-08-25 1982-08-17 General Instrument Corporation Alpha-numeric display array and method of manufacture
WO1980001860A1 (fr) * 1979-03-01 1980-09-04 Amp Inc Panneau d'affichage a diodes emettrices de lumiere
EP0042122A2 (fr) * 1980-06-13 1981-12-23 Kabushiki Kaisha Toshiba Module LED pour un dispositif d'affichage plat
FR2518317A1 (fr) * 1981-12-10 1983-06-17 Licentia Gmbh Reseau plan de diodes electroluminescentes
JPS5967673A (ja) * 1982-10-12 1984-04-17 Toyo Commun Equip Co Ltd 面照明用発光ダイオ−ド
EP0182254A2 (fr) * 1984-11-12 1986-05-28 Takiron Co. Ltd. Matrice à points pour affichage lumineux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 173 (E-259)[1610], 9th August 1984; & JP-A-59 067 673 (TOUYOU TSUUSHINKI K.K.) 17-04-1984 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206444A (en) * 1987-06-10 1989-01-05 Yue Wen Cheng Light emitting diode
GB2225897A (en) * 1988-12-12 1990-06-13 Samsung Electronics Co Ltd An LED array head and a method of making the same
GB2225897B (en) * 1988-12-12 1992-12-23 Samsung Electronics Co Ltd An led array head and a method of making the same
GB2226185A (en) * 1988-12-17 1990-06-20 Samsung Electronics Co Ltd A light emitting apparatus
GB2226185B (en) * 1988-12-17 1993-06-02 Samsung Electronics Co Ltd A light emitting apparatus
GB2366900B (en) * 2000-09-13 2004-12-29 Box Consultants Ltd A display element
GB2366900A (en) * 2000-09-13 2002-03-20 Box Consultants Ltd An Illuminated Display Element
WO2002069308A2 (fr) * 2001-02-22 2002-09-06 Hagen Glass Dispositif d'indication
WO2002069308A3 (fr) * 2001-02-22 2003-10-02 Glass Hagen Dispositif d'indication
WO2005050598A1 (fr) * 2003-11-14 2005-06-02 Smartslab Limited Systeme d'affichage modulaire
WO2008046241A1 (fr) * 2006-10-11 2008-04-24 Tsungwen Chan Structure de plaque de rétroéclairage comportant des diodes électroluminescentes incorporées et son procédé de fabrication
DE102012100426A1 (de) * 2012-01-19 2013-07-25 Osram Opto Semiconductors Gmbh Anzeigevorrichtung und Verfahren zur Darstellung dreidimensionaler Bilder
WO2015192430A1 (fr) * 2014-06-18 2015-12-23 黄欣 Unités carrées d'écran d'affichage à del
WO2016022323A1 (fr) * 2014-08-08 2016-02-11 Motorola Solutions, Inc. Dispositif d'affichage à diode électroluminescente (del) pour un dispositif de communication portable
US9366425B2 (en) 2014-08-08 2016-06-14 Motorola Solutions, Inc. Light emitting diode (LED) display for a portable communication device
CN114770971A (zh) * 2022-04-27 2022-07-22 郑州大学 泡沫填充仿生点阵复合结构及其制备方法
CN114770971B (zh) * 2022-04-27 2023-07-07 郑州大学 泡沫填充仿生点阵复合结构及其制备方法

Also Published As

Publication number Publication date
EP0206176A3 (en) 1987-11-25
DE3683195D1 (de) 1992-02-13
EP0206176B1 (fr) 1992-01-02
HK47095A (en) 1995-04-07

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