EP1643473A1 - Elément optique pour panneaux de signalisation routière variable - Google Patents

Elément optique pour panneaux de signalisation routière variable Download PDF

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Publication number
EP1643473A1
EP1643473A1 EP04023304A EP04023304A EP1643473A1 EP 1643473 A1 EP1643473 A1 EP 1643473A1 EP 04023304 A EP04023304 A EP 04023304A EP 04023304 A EP04023304 A EP 04023304A EP 1643473 A1 EP1643473 A1 EP 1643473A1
Authority
EP
European Patent Office
Prior art keywords
light
optical element
lens
housing
element according
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
EP04023304A
Other languages
German (de)
English (en)
Other versions
EP1643473B1 (fr
Inventor
Bernd Eschbach
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.)
Dambach Werke GmbH
Original Assignee
Dambach Werke GmbH
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 Dambach Werke GmbH filed Critical Dambach Werke GmbH
Priority to DE502004002913T priority Critical patent/DE502004002913D1/de
Priority to AT04023304T priority patent/ATE354152T1/de
Priority to EP04023304A priority patent/EP1643473B1/fr
Priority to BRPI0504348-4A priority patent/BRPI0504348A/pt
Priority to US11/236,901 priority patent/US7591574B2/en
Publication of EP1643473A1 publication Critical patent/EP1643473A1/fr
Application granted granted Critical
Publication of EP1643473B1 publication Critical patent/EP1643473B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like

Definitions

  • the invention relates to an optical element for variable message signs according to the preamble of claim 1.
  • Variable message signs are used in many places to regulate road traffic by displaying certain traffic signs, which may be displayed as symbols or as characters, depending on the traffic density and predetermined boundary conditions.
  • a variable message sign is equipped with a matrix-like arrangement of optical elements, which make up the overall display. Each optical element corresponds to a point of light, which is to be taken by the driver already at a distance, so that the traffic can be safely routed.
  • EP 0 930 600 A1 is an example of an optical element in the case of variable traffic signs, in which the problem of phantom light is explicitly addressed.
  • the light emitted by an LED light is focused by a converging lens and directed to a scattered lens arranged at some distance from the convergent lens.
  • the scattering lens By suitable design of the scattering lens, the light can be distributed according to desired specifications.
  • the disadvantage here is the inevitable to avoid phantom large distance between the convergent lens and the diffusing lens and the fact that a diaphragm has to be arranged in the region of the focal spot of the condenser lens in order to comply with the relevant regulations for light distribution and phantom light.
  • the LEDs are constantly being improved, e.g. through improved reflection of the light actually emitted to the rear. This was achieved mainly by the use of modern reflectors within the LEDs, so that currently extremely powerful LEDs are available. When using modern LEDs, the potentially higher phantom light must be prevented by appropriate measures.
  • the present invention is therefore an object of the invention to provide an optical element for variable message signs, which emits a very high light output in the desired areas, at the same time all regulations are observed with respect to the phantom light and the lowest possible space consumption is ensured with a simple and inexpensive construction.
  • the optical element according to the invention for variable message signs has an elongated housing in which at least one light source and at least two lenses are arranged successively in the longitudinal direction of the housing, wherein the lenses are used to determine the beam path of the light emitted by the light source in the emission direction, and wherein the closer arranged on the light source lens is designed as a converging lens.
  • the optical element according to the invention is characterized in that the lens which is farther from the light source is designed as a rod lens.
  • a light entry surface of the rod lens has a first radius in the horizontal direction, which merges in a vertical direction into a generally larger radius or a plane surface, so that upon passage of the light beams horizontally stronger bundling and thus a deflection of the light beam at a shorter distance from the convergent lens takes place as in the vertical direction.
  • the light exit surface of the rod lens advantageously has a spherical or aspherical optical shaping surface, which ensures a scattering of the exiting light in a predetermined angular range, so that the road users can easily perceive the traffic signal both from a relatively large distance as well as from close.
  • the converging lens and the light entry surface of the rod lens are designed such that light beams emitted by the light source intersect within the rod lens between light entry surface and light exit surface, whereby a brighter light output in the field of view is achieved.
  • the housing advantageously has a first housing section in which the light source and the condenser lens are fixed, and a second housing section in which the rod lens is mounted. This facilitates the assembly of the individual elements.
  • the first housing section is attached to the second housing section, wherein a cavity, which is formed in a front region of the first housing section, receives the second housing section.
  • the rod lens in a lower region in the direction of the light entry surface can have a beveled surface which can be used alone or in combination with further elements for suppressing the light rejection.
  • the light entry surface of the rod lens beats in a lower region on a projection, which additionally prevents a residual stray light from reaching the LED reflector, whereby both a defined distance between the optical elements is ensured and it is ensured that even very flat incident sunlight produces virtually no phantom light.
  • a further outer panel is arranged in the outer upper end region of the second housing section, which minimizes the irradiation of sunlight into the optical lens system.
  • variable traffic sign is equipped with a front plate having a plurality of receiving holes in which the optical elements according to the invention are mounted.
  • Such variable message signs are extremely powerful and meet all standards regarding light distribution and phantom light behavior.
  • Fig. 1 and 2 the elements of the optical element according to the invention for variable message signs are shown in longitudinal section, in Fig. 3 from above in a cross section along the horizontal median plane of the arrangement.
  • the optical element 1 has a light source 3, which is preferably designed as a light emitting diode (LED).
  • the provided with the usual terminals LED 3 is received and fixed in a first elongated housing portion 5 near the rear end 7. It is likewise possible to use LEDs arranged on printed circuit boards as lighting means.
  • a converging lens 9 is fixed in a relatively short distance to the LED 3 in the first housing section 5, which bundles the light emitted by the LED 3 and transmits it to a light entry surface 11 of a rod lens 13.
  • the rod lens 13 is received and fixed in a second elongated housing portion 15, wherein the light entry surface 11 of the rod lens 13 strikes during insertion of the same in the second housing portion 15 in a lower portion of a projection 17, which is preferably integrally formed with the second housing portion 15 and protrudes tongue-shaped inward.
  • the projection 17 thus serves for the exact positioning of the rod lens 13 in the second housing portion 15 and can simultaneously prevent stray light. It can absorb the light rays which emerge in the lower region of the converging lens 9 or absorb solar rays which are incident from the front into the optical system according to the invention and leave the rod lens 13 in the lower region through the light entry surface 11, as can be seen in FIG. In the lower area, the Rod lens 13 continues in the direction of the light entry surface 11 a beveled surface 19, which also serves to derive flat incident stray light.
  • the light entry surface 11 of the rod lens 13 is shaped in such a way that different beam focusing angles and thus different emission angles can be realized in the horizontal and vertical plane.
  • it has a first radius in the horizontal direction, which merges in the vertical direction into a second, usually larger radius or a plane surface, so that a greater bundling and a deflection of the light beam at a shorter distance from the converging lens takes place horizontally upon passage of the light beams as in the vertical direction.
  • the light entry surface 11 In interaction with the converging lens 9, the light entry surface 11 thus ensures, due to its geometry, that the light beams emitted by the light source 3 intersect within the rod lens 13 and are conducted to the light exit surface 21 of the rod lens 13.
  • the light exit surface 21 of the rod lens 13 is shaped such that the light coming from the light entry surface 11 is emitted in the vertical and horizontal directions in the respectively desired angular ranges.
  • the desired light distribution in the emission area is achieved by a suitable combination of the configuration of light entry surface 11 and light exit surface 21 of the rod lens 13.
  • the second housing portion 15 may also have in the outer upper end portion of an outer panel (not shown), which prevents the incidence of sunlight from a certain inclination angle to the horizontal from the outset.
  • outer panel, beveled surface 19 and acting as an inner projection projection 17 can be used together, but it is also conceivable to dispense with a use of one of the three elements and still achieve sufficiently good values.
  • an aspherical radiation is usually to be achieved in which no or only a small emission of light upwards, which brings the advantage of a complete light distribution in the visible from the road user direction, in the width and down to the roadway with it.
  • the radius of the light exit surface 21 moreover, the emission angle can be reduced or increased.
  • a plurality of such optical elements 1 is included.
  • a front panel 25 is shown having receiving holes 27 in which the optical elements 1 are inserted and fixed.
  • the LED 3 and the condenser lens 9 are inserted into a rear portion 7 of the first housing portion 5 and fixed therein, leaving in a front portion 29 of the first housing portion 5, a cavity 31 which corresponds substantially to the size of a receiving hole 27.
  • the rod lens 13 is inserted into the second housing portion 15 as far as the stop on the projection 17 and fixed there.
  • the second housing portion 15 is pressed from the front into the receiving hole 27, wherein angle projections 33 which are bent substantially perpendicularly from the front end of the second housing portion 15 outwardly limit the insertion when they strike the front panel 25.
  • the receiving hole 27 and the second housing portion 15 are formed, e.g.
  • the system can be made particularly waterproof when the receiving openings have a slightly conical shape and grooves 35 are provided on the outside of the second housing portion 15, which are squeezed when pressed into the front panel 25.
  • the first housing section 5 is pushed onto the second housing section 15 from the rear side and latched there by suitable means. Here, it serves to improve the stability that the first housing section 5 extends to the front panel 25. Due to the precise manufacture of the individual components and the meshing of the housing sections, the distances between the lenses 9 and 13 to each other and their spatial orientation are precisely defined.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Road Signs Or Road Markings (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Communication System (AREA)
EP04023304A 2004-09-30 2004-09-30 Elément optique pour panneaux de signalisation routière variable Not-in-force EP1643473B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502004002913T DE502004002913D1 (de) 2004-09-30 2004-09-30 Optisches Element für Wechselverkehrszeichen
AT04023304T ATE354152T1 (de) 2004-09-30 2004-09-30 Optisches element für wechselverkehrszeichen
EP04023304A EP1643473B1 (fr) 2004-09-30 2004-09-30 Elément optique pour panneaux de signalisation routière variable
BRPI0504348-4A BRPI0504348A (pt) 2004-09-30 2005-09-20 elemento ótico para sinais de mensagem variável
US11/236,901 US7591574B2 (en) 2004-09-30 2005-09-28 Optical element for variable message signs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04023304A EP1643473B1 (fr) 2004-09-30 2004-09-30 Elément optique pour panneaux de signalisation routière variable

Publications (2)

Publication Number Publication Date
EP1643473A1 true EP1643473A1 (fr) 2006-04-05
EP1643473B1 EP1643473B1 (fr) 2007-02-14

Family

ID=34926793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04023304A Not-in-force EP1643473B1 (fr) 2004-09-30 2004-09-30 Elément optique pour panneaux de signalisation routière variable

Country Status (5)

Country Link
US (1) US7591574B2 (fr)
EP (1) EP1643473B1 (fr)
AT (1) ATE354152T1 (fr)
BR (1) BRPI0504348A (fr)
DE (1) DE502004002913D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860719A1 (fr) 2013-10-10 2015-04-15 Ortana Elektronik Yazilim Taah. San. ve Tic. A.S. Fourniture d'informations à l'aide d'un élément optique
US9171488B2 (en) 2010-03-24 2015-10-27 Siemens Aktiengesellschaft Optical display element and display device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8944658B1 (en) * 2009-09-11 2015-02-03 The Boeing Company LED holder for lighting panels
PL415364A1 (pl) * 2015-12-17 2017-06-19 Instytut Optyki Stosowanej Im. Prof. Maksymiliana Pluty Układ optyczny do rozsyłu światła z pojedynczego piksela tablicy znaków drogowych o zmiennej treści
PL231325B1 (pl) * 2015-12-17 2019-02-28 Inst Optyki Stosowanej Im Prof Maksymiliana Pluty Układ optyczny do pojedynczego piksela tablicy znaków drogowych o zmiennej treści

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779967A (en) * 1986-07-01 1988-10-25 Ram Optical Instrumentation, Inc. Objective lens assembly
EP0930600A1 (fr) * 1998-01-19 1999-07-21 SWARCO FUTURIT Verkehrssignalsysteme Ges.m.b.H. Elément optique ayant DEL et deux lentilles pour la génération des points de lumière pour panneaux de signalisation et d'affichage
WO2004068447A1 (fr) * 2003-01-31 2004-08-12 Swarco Futurit Verkehrssysteme Ges.M.B.H. Element optique pour signaux routiers variables

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282167A (en) * 1937-08-21 1942-05-05 George M Cressaty Flashlight
JPS5724336Y2 (fr) * 1977-10-08 1982-05-26
JP3507284B2 (ja) * 1997-06-24 2004-03-15 キヤノン株式会社 ロッドレンズアレイ及び密着型イメージセンサ及び画像読取装置
US6550952B1 (en) * 2000-04-28 2003-04-22 Ilight Technologies, Inc. Optical waveguide illumination and signage device and method for making same
US7217022B2 (en) * 2004-08-31 2007-05-15 Opto Technology, Inc. Optic fiber LED light source

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779967A (en) * 1986-07-01 1988-10-25 Ram Optical Instrumentation, Inc. Objective lens assembly
EP0930600A1 (fr) * 1998-01-19 1999-07-21 SWARCO FUTURIT Verkehrssignalsysteme Ges.m.b.H. Elément optique ayant DEL et deux lentilles pour la génération des points de lumière pour panneaux de signalisation et d'affichage
WO2004068447A1 (fr) * 2003-01-31 2004-08-12 Swarco Futurit Verkehrssysteme Ges.M.B.H. Element optique pour signaux routiers variables

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9171488B2 (en) 2010-03-24 2015-10-27 Siemens Aktiengesellschaft Optical display element and display device
EP2860719A1 (fr) 2013-10-10 2015-04-15 Ortana Elektronik Yazilim Taah. San. ve Tic. A.S. Fourniture d'informations à l'aide d'un élément optique
US9443452B2 (en) 2013-10-10 2016-09-13 Ortana Elektronik Yazilim Taah. San. ve Tic. A.S. Providing information using an optical element
EP3267427A1 (fr) 2013-10-10 2018-01-10 Ortana Elektronik Yazilim Taah. San. ve Tic. A.S. Élément optique pour un système d'informations permettant d'afficher des informations

Also Published As

Publication number Publication date
US7591574B2 (en) 2009-09-22
EP1643473B1 (fr) 2007-02-14
BRPI0504348A (pt) 2006-05-09
ATE354152T1 (de) 2007-03-15
DE502004002913D1 (de) 2007-03-29
US20060077661A1 (en) 2006-04-13

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