EP0889457B1 - "Panneau d'affichage lumineux" - Google Patents

"Panneau d'affichage lumineux" Download PDF

Info

Publication number: EP0889457B1
Authority: EP; European Patent Office
Prior art keywords: display panel; light; optical filter; emitting elements; panel according
Prior art date: 1997-07-04
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.): Expired - Lifetime

Application number

EP98401636A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0889457A1 (fr

Inventor

Jaques Le Gars

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.)

D'exploitation Du Mobilier A Usage Public Semup Ste

Original Assignee

D'exploitation Du Mobilier A Usage Public Semup Ste

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.)

1997-07-04

Filing date

1998-07-01

Publication date

2001-04-11

1998-07-01 Application filed by D'exploitation Du Mobilier A Usage Public Semup Ste filed Critical D'exploitation Du Mobilier A Usage Public Semup Ste

1999-01-07 Publication of EP0889457A1 publication Critical patent/EP0889457A1/fr

2001-04-11 Application granted granted Critical

2001-04-11 Publication of EP0889457B1 publication Critical patent/EP0889457B1/fr

2018-07-01 Anticipated expiration legal-status Critical

Status Expired - Lifetime 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

Definitions

the present invention relates to panels luminous display, and in particular to those of these panels comprising an opaque bottom having a front face dark in color with a plurality of light elements, this front face as well as the light elements being covered by a front optical filter.
Document FR-A-2 638 271 describes an example of a such a luminous display panel, in which the filter front optic is roughly the same color as the light elements.
an additional optical filter is interposed between the front optical filter and the opaque background, this filter additional optics having a complementary color of the color of the front optical filter and being pierced with holes in correspondence with the light elements.
This known display panel gives all satisfaction, since it is very readable, even when it is in full sun, thanks to the high contrast obtained between the light elements and the opaque background.
the object of the present invention is in particular to alleviate these disadvantages.
a display panel of the genre in question is essentially characterized in that the front optical filter is an absorbent filter substantially neutral, which has a coefficient of transmission between 10 and 60% on substantially the whole visible spectrum of light, the display panel having no other optical filter interposed between the bottom of the display panel and said optical filter frontal.
a panel is obtained display which always has excellent visibility, by allowing a significant contrast between the elements bright and opaque background, and moreover, this panel display may lend itself to display if necessary in color, and it is less expensive than the panels aforementioned known display panels.
Figure 1 shows an example of a display panel luminous 1 according to the invention, which in this case can be implemented in urban areas to disseminate information with road users.
the invention is not limited to this special type of light display, but includes otherwise all types of illuminated display panels intended to be installed in particular in the open air and / or in public places (public roads in urban areas, road or motorway, airports, stations, etc ...), to disseminate information for example or advertising messages.
the display panel 1 includes a front face 2 transparent, which is constituted in this case by a brown optical filter which covers sets 3 of light elements arranged on the face before an opaque background 4.
the sets 3 light elements each consist of a plurality light elements 5, for example light-emitting diodes, which can be carried by the bottom 4, which bottom 4 is then advantageously constituted by a printed circuit board 6 which is adapted to supply electrically each of the light-emitting diodes 5.
the front face of the plate 6, that is to say the face of this plate which is oriented towards filter 2, is dark color, advantageously black.
the bottom 4 could include not only plate 6 of printed circuit, but still a cover 7 pierced with holes 8 in correspondence with the light-emitting diodes 5, or in correspondence with the sets 3 of light-emitting diodes.
the front face of the cover 7, that is to say the face of this cover which is oriented towards the filter 2 is dark in color, advantageously black, and the printed circuit board 6 can optionally be any color.
the light-emitting diodes 5 emit light mainly at a peak in length wave located for example between 500 and 650 nm, and advantageously located at approximately 590 nm (yellow light).
light emitting diodes 5 may be AlInGaP technology diodes, commercially available in particular by the company TOSHIBA under the reference S4E38XX.
the optical filter 2 is a filter substantially neutral absorbent, i.e. absorbing light over the entire visible spectrum, and more particularly which transmits from 10 to 60%% of the light that it receives over substantially the entire visible spectrum of light (400 nm-800 nm).
the optical filter 2 could be that marketed under the reference PLEXIGLAS GS UMBRA 806 by the company ROHM.
the coefficient of transmission ⁇ of this particular filter is between about 12 and 40% for wavelengths ⁇ of light ranging from 400 to 800 nm.
the contrast is not more than 3.5, and the display panel is unreadable.

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Theoretical Computer Science (AREA)
Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Illuminated Signs And Luminous Advertising (AREA)
Optical Filters (AREA)
Electroluminescent Light Sources (AREA)

EP98401636A 1997-07-04 1998-07-01 "Panneau d'affichage lumineux" Expired - Lifetime EP0889457B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9708505		1997-07-04
FR9708505A FR2765712B1 (fr)	1997-07-04	1997-07-04	Panneau d'affichage lumineux

Publications (2)

Publication Number	Publication Date
EP0889457A1 EP0889457A1 (fr)	1999-01-07
EP0889457B1 true EP0889457B1 (fr)	2001-04-11

Family

ID=9508875

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98401636A Expired - Lifetime EP0889457B1 (fr)	1997-07-04	1998-07-01	"Panneau d'affichage lumineux"

Country Status (6)

Country	Link
US (1)	US6118210A (pt)
EP (1)	EP0889457B1 (pt)
DE (1)	DE69800682T2 (pt)
ES (1)	ES2157646T3 (pt)
FR (1)	FR2765712B1 (pt)
PT (1)	PT889457E (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3576859B2 (ja) *	1999-03-19	2004-10-13	株式会社東芝	発光装置及びそれを用いたシステム
GB2359580B (en) *	2000-02-26	2003-12-10	Agd Systems Ltd	Traffic signal
ES2463393T3 (es) *	2011-11-25	2014-05-27	Skidata Ag	Dispositivo de visualización

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3736050A (en) *	1970-07-27	1973-05-29	Ato Inc	High contrast filter for visual displays down-converting otherwise blocked radiation
US4142126A (en) *	1978-03-06	1979-02-27	Wagner Electric Corporation	Vacuum fluorescent display having uniform character brightness
CH640966A5 (en) *	1979-10-06	1984-01-31	Zettler Elektro Apparate Ag	LED arrangement for large-scale display of information
FR2638271B1 (fr) *	1988-10-21	1990-12-28	Soc Et Dev Prod Electron	Tableau d'affichage a elements lumineux
DE4225140A1 (de) *	1992-07-30	1994-02-03	Pintsch Bamag Ag	Phantomlichtminderung von Leuchtdioden

1997
- 1997-07-04 FR FR9708505A patent/FR2765712B1/fr not_active Expired - Fee Related
1998
- 1998-07-01 US US09/114,237 patent/US6118210A/en not_active Expired - Fee Related
- 1998-07-01 EP EP98401636A patent/EP0889457B1/fr not_active Expired - Lifetime
- 1998-07-01 DE DE69800682T patent/DE69800682T2/de not_active Expired - Fee Related
- 1998-07-01 PT PT98401636T patent/PT889457E/pt unknown
- 1998-07-01 ES ES98401636T patent/ES2157646T3/es not_active Expired - Lifetime

Also Published As

Publication number	Publication date
DE69800682D1 (de)	2001-05-17
FR2765712B1 (fr)	1999-09-17
DE69800682T2 (de)	2001-11-22
FR2765712A1 (fr)	1999-01-08
EP0889457A1 (fr)	1999-01-07
US6118210A (en)	2000-09-12
PT889457E (pt)	2001-09-28
ES2157646T3 (es)	2001-08-16

Legal Events

Date	Code	Title	Description
1998-11-20	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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1999-08-25	17P	Request for examination filed	Effective date: 19990625
1999-09-15	AKX	Designation fees paid	Free format text: BE DE ES GB NL PT
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2000-10-05	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
2000-10-05	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
2000-10-11	17Q	First examination report despatched	Effective date: 20000825
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