EP1571640A2 - Panneau lumineux amélioré - Google Patents
Panneau lumineux amélioré Download PDFInfo
- Publication number
- EP1571640A2 EP1571640A2 EP05380027A EP05380027A EP1571640A2 EP 1571640 A2 EP1571640 A2 EP 1571640A2 EP 05380027 A EP05380027 A EP 05380027A EP 05380027 A EP05380027 A EP 05380027A EP 1571640 A2 EP1571640 A2 EP 1571640A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- illumination
- regions
- diffuser
- opacity
- light panel
- 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- Withdrawn
Links
- 238000005286 illumination Methods 0.000 claims abstract description 39
- 230000007704 transition Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 230000001788 irregular Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
- G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
Definitions
- the present invention is aimed at providing an improved light panel which brings substantial features of novelty and inventive step over the prior art.
- the light panel to which the present invention relates is of the flat type with internal light means and is intended for advertising applications and the like, having light sources, such as fluorescent tubes, on the inside and an advertising motif superposed on a transparent or translucent screen for permitting the visualisation thereof.
- Fluorescent tubes have a linear arrangement so that the maximum luminous intensity coincides with the axis which, passing through the fluorescent tube, is perpendicular to the screen, while for the other regions, the luminous intensity decreases. This results in a marked striped effect on a translucent plate arranged in front of the fluorescent tubes, giving rise to an unpleasant effect of irregular illumination.
- the present invention provides a diffuser which is to be located between the fluorescent illumination tubes and the front screen of the light panel and which is provided with regions of dots in a grid like pattern or lines, having a density varying from the portion corresponding to the front of the fluorescent tubes as far as the intermediate region between each pair of fluorescent tubes, so that the greatest density and therefore the greatest opacity corresponds to the front portion opposite each of the tubes and the opacity fades or becomes less marked progressively from the central portion up to the separating regions between each pair of tubes.
- the density of the array and therefore the opacity effect produced is continuously variable from the region coinciding with the tube up to the intermediate regions between each pair of tubes so that the array density or opacity is inversely proportional to the illumination intensity produced by the tube on the screen, thus compensating for the variable illumination intensity produced by the tubes and giving rise to regular and constant illumination of the panel.
- the opacity created by arranging lines or dots, a combination thereof or other small figures or other means, can be produced by any known method, giving rise to shading whose basic feature is its symmetrical distribution from the portion coinciding with the front of each tube as far as the sides and which provides a density of opacity inversely proportional to the luminous intensity produced by the tube, thus compensating for the irregularity of illumination.
- the light panel to which the present invention relates comprises a frame 1 provided in a conventional manner with linear illumination sources, especially fluorescent tubes 2, 2', 2" ... arranged parallel with one another between an upper edge and a lower edge of the frame 1, for example, in a vertical arrangement, as shown in Figure 1.
- the panel to which the present invention relates basically has a diffuser 3 in an intermediate arrangement between the light tubes 2, 2', 2" ... and a front screen 4 which is, for example, translucent or of another type and which will be the support for the advertising motif which it is desired to illuminate.
- the diffuser 3 has as a basic feature the provision of a series of regions 5, 5', 5" ... which are arranged to correspond to the location of the light tubes 2, 2', 2" ...
- regions 5, 5', 5" are characterized in that they have maximum opacity in their central region 6, 6', 6" corresponding to the axis of the tubes on which they are superposed and the opacity decreases up to the edges which have been represented with the dash lines 7 and 8 for the stripe 6.
- the basic feature of the shading of those regions is that the opacity thereof is inversely proportional to the illumination received from the tube so that, since the variable illumination is compensated for, the luminous effect of the panel on the front screen 4 is that of uniform illumination.
- variable opacity can be achieved by a large number of methods known in the art, such as, for example, arrays of dots or lines or other shapes or a combination thereof, which are obtained by silk screen printing, spraying, photographic methods, etc..
- each of the regions 5, 5', 5" ... which, for the sake of greater clarity, have been represented by the lines 7 and 8 for the region or stripe 5, will in practice be hardly distinguishable given that there will be an even and gradual fading between the central region 6 and the regions of the edges until the intermediate regions 9 between each pair of regions of variable opacity are reached. Therefore, in practical embodiments, the lines 7 and 8 will in many cases not be noticed.
- both the upper portion and the lower portion of the regions of variable opacity have curved regions, such as 10 and 11, Figure 1, in which there is no opacity in order to accommodate the region where the fluorescent tube is connected. In that region, because illumination is minimal, the opacity effect of the diffuser is not necessary.
- the fluorescent tubes 12 and 13 produce variable illumination on the diffuser 14, as can be seen by the distribution of light rays, while, after passing through the diffuser, the illumination is regular, as can be seen by the light rays 15, 15', 15" which have been shown in a uniform manner.
- the tubes 16 and 17 produce an illumination such that, in the central portion of the screen 18, the illumination is of greater intensity, as can be seen by the rays 19 and 20, while, in the lateral regions, the light rays 21 and 22 are dimmer and therefore they produce an irregular illumination effect on the screen 18.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200400476U | 2004-03-01 | ||
| ES200400476U ES1056874Y (es) | 2004-03-01 | 2004-03-01 | Panel luminoso, perfeccionado. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1571640A2 true EP1571640A2 (fr) | 2005-09-07 |
| EP1571640A3 EP1571640A3 (fr) | 2005-12-07 |
Family
ID=32319912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05380027A Withdrawn EP1571640A3 (fr) | 2004-03-01 | 2005-02-17 | Panneau lumineux amélioré |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1571640A3 (fr) |
| ES (1) | ES1056874Y (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002745A1 (fr) * | 2014-10-02 | 2016-04-06 | Goodrich Lighting Systems GmbH | Unité d'éclairage d'aéronef intérieure et procédé de fabrication d'une telle unité |
| WO2018149693A1 (fr) * | 2017-02-20 | 2018-08-23 | Philips Lighting Holding B.V. | Système de revêtement de surface électroluminescente |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2261018B1 (es) * | 2004-07-05 | 2007-08-01 | Universidad De Malaga | Sistema modular para la iluminacion homogenea de mobiliario urbano con diodos leds. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240420B (en) * | 1989-12-21 | 1993-09-08 | Hi Lite Signs Ltd | An illuminated sign. |
| NO175399C (no) * | 1992-03-31 | 1994-10-05 | Osram Fabrikken As | Diffusor til bruk i reklame-/informasjonstavler |
| US5669700A (en) * | 1996-02-16 | 1997-09-23 | Exhibit-Group/Giltspur, Inc. | Light intensity equalizing element for lighted display panel |
-
2004
- 2004-03-01 ES ES200400476U patent/ES1056874Y/es not_active Expired - Fee Related
-
2005
- 2005-02-17 EP EP05380027A patent/EP1571640A3/fr not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002745A1 (fr) * | 2014-10-02 | 2016-04-06 | Goodrich Lighting Systems GmbH | Unité d'éclairage d'aéronef intérieure et procédé de fabrication d'une telle unité |
| US10018321B2 (en) | 2014-10-02 | 2018-07-10 | Goodrich Lighting Systems Gmbh | Interior aircraft light unit and method of producing an interior aircraft light unit |
| WO2018149693A1 (fr) * | 2017-02-20 | 2018-08-23 | Philips Lighting Holding B.V. | Système de revêtement de surface électroluminescente |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1571640A3 (fr) | 2005-12-07 |
| ES1056874U (es) | 2004-05-16 |
| ES1056874Y (es) | 2004-09-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
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| AX | Request for extension of the european patent |
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| PUAL | Search report despatched |
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|
| AKX | Designation fees paid | ||
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20060607 |