EP1082714A1 - Illuminated indication device for road traffic - Google Patents
Illuminated indication device for road trafficInfo
- Publication number
- EP1082714A1 EP1082714A1 EP99919231A EP99919231A EP1082714A1 EP 1082714 A1 EP1082714 A1 EP 1082714A1 EP 99919231 A EP99919231 A EP 99919231A EP 99919231 A EP99919231 A EP 99919231A EP 1082714 A1 EP1082714 A1 EP 1082714A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- display
- display device
- illuminated
- exit surface
- 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
Links
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
-
- 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
-
- 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
- G09F13/0418—Constructional details
- G09F13/0472—Traffic signs
-
- 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
- G09F13/0418—Constructional details
- G09F13/0481—Signs, boards or panels having a curved shape
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
-
- 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
- G09F13/0418—Constructional details
- G09F2013/05—Constructional details indicating exit way or orientation
Definitions
- the invention relates to a luminous display device for road traffic, in which a plurality of display points with a light entry surface and a light exit surface are formed in or on a display surface, which are illuminated from the rear of the display surface by means of respectively assigned light elements of smaller diameter.
- Such a light display device is identified as known in DE 4040467 C1.
- a multiplicity of display points are formed on a display surface by means of respective display lenses, which are illuminated from the rear of the display surface via luminous elements in the form of optical fibers directed onto the display lenses.
- the display lenses By means of the display lenses, the cross-section of which is larger than the cross-section of the optical fibers, relatively large-area display points are obtained which improve the recognizability of a displayed character.
- the light exit is bundled by means of the lenses, as a result of which, on the other hand, the luminance at larger angles outside the radiation axis can become too low for good recognition, in particular in a bright environment.
- the invention has for its object to provide a luminous display device of the type mentioned, with which an increased luminance of the light spots is achieved under larger observation angles with unchanged light output of the lighting elements.
- the light exit surface and / or the light entry surface are / are shaped such that the light intensity distribution on the display side has a greater extent in the horizontal direction than in the vertical direction.
- This configuration of the display lenses results in an increased light intensity or luminance of the display points under enlarged horizontal observation angles, so that, for example, the display can be reliably recognized even when approaching from a road curve.
- the light intensity distribution in the vertical direction is reduced to a correspondingly smaller angle with respect to the radiation axis at the expense of the light intensity distribution in the horizontal direction, but is sufficient to meet the requirements of good readability from the usual observation distances. Overall, the light of the display for real observation conditions in road traffic is significantly improved.
- a suitable design of the luminous display device for easy recognition is that the half-value width of the light intensity distribution in the horizontal direction is at least 1.4 times larger than the half-width value width in the vertical direction.
- the half-value width in the horizontal direction can be twice as large as in the vertical direction, the light intensities with the same light sources being within the half-value width as large as within the half-value width of previous radially symmetrical light intensity distributions.
- the half-width of a radially symmetrical light distribution for example, 12 °
- this light distribution is achieved with the present display device within a vertical half-width of, for example, 6 ° and horizontal half-width of 24 °, so that there is a doubling of the corresponding off-axis recognition angle in the important horizontal area .
- a simple design of the display lenses is that the radius of curvature of the light exit surface in the horizontal direction is smaller than in the vertical direction, an advantageous embodiment being that the light exit surface is convexly curved outwards in the vertical direction and has a zero radius of curvature in the horizontal direction.
- the display lenses In such a way that the light exit surface is in the form of a cylindrical section. Due to the cylindrical shape, the lenses can be made from a glass rod made of acrylic, for example, and inserted and fixed with a cylindrical piece in a corresponding hole in the display surface.
- an embodiment is favorable for the functioning and maintenance in such a way that the display lens has a cylindrical section adjoining the light entry surface and is tapered outwardly on its radially symmetrical light entry surface and has a central concave section. It is sufficient if the display lens is radially symmetrical at least in the light entry area.
- a clear positioning and positioning as well as a tight fixing possibility on the display surface is achieved in that the display lens has a flange-like collar on the circumference with which it rests on the outside of the display surface.
- the measure is advantageous in that a marking for the installation position is formed on the collar.
- a simple positioning aid is that the marking is designed as a circular section.
- a display lens 1 is shown from below, under b) a display lens from the side and under c) from a light entry surface 9.
- the display lens 1 has a cylindrical section 2 in the direction of the optical axis, to which, on the one hand, the light entry surface 9 facing a display surface and, on the other hand, a light exit surface 8 are connected, which via an assigned lighting element, for example one on the display surface lens 1 facing away from illuminated optical fiber or a light emitting diode is illuminated.
- the light exit surface 8 is in turn shaped in the form of a cylindrical section, wherein it is convexly curved outwards in the vertical direction (reference number 4) and straight in the horizontal direction (reference number 3).
- the light entry surface 9 consists of a circumferential bevel section-shaped bevel 7, which is cut off in a circular section on its lower side in the installed position, as can be seen in particular in FIG. C). Furthermore, a concave, spherical section-shaped section 5 is formed in a central region of the light entry surface 9.
- the light entry surface 9 is provided with a collar-like collar 6 on the outer circumference of the cylindrical section 2, with which the display lens 1, in the assembled state, lies flange-like on the display surface, so that a clear installation position in the axial direction is achieved.
- a clear installation position is formed by the cut-off part on the underside of the edge of the light entry surface 9, which continues in the axial direction over the collar 6 and adjoins the cylindrical section 2 tangentially in the axial view according to illustration c), so that thereby the light entry or exit is not impaired.
- the display lens 1 designed in the manner described results in a broadening of the luminous intensity distribution curve in the horizontal direction and a narrowing of the luminous intensity distribution curve in the vertical direction, wherein the half-value width can be, for example, 6 ° in the vertical direction and 24 ° in the horizontal direction.
- the light intensity within the half-width is as large as with a radially symmetrical light distribution of a half value width of 1 2 ° if the irradiation into the display lens 1 is the same.
- the described embodiment of the display lens 1 is also favorable for assembly and manufacture.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19824425A DE19824425A1 (en) | 1998-05-30 | 1998-05-30 | Illuminated display device for road traffic |
DE19824425 | 1998-05-30 | ||
PCT/EP1999/002506 WO1999063510A1 (en) | 1998-05-30 | 1999-04-14 | Illuminated indication device for road traffic |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1082714A1 true EP1082714A1 (en) | 2001-03-14 |
EP1082714B1 EP1082714B1 (en) | 2002-03-13 |
Family
ID=7869540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99919231A Expired - Lifetime EP1082714B1 (en) | 1998-05-30 | 1999-04-14 | Illuminated indication device for road traffic |
Country Status (6)
Country | Link |
---|---|
US (1) | US6419376B1 (en) |
EP (1) | EP1082714B1 (en) |
BR (1) | BR9910841A (en) |
CA (1) | CA2333500A1 (en) |
DE (2) | DE19824425A1 (en) |
WO (1) | WO1999063510A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7688222B2 (en) | 2003-09-18 | 2010-03-30 | Spot Devices, Inc. | Methods, systems and devices related to road mounted indicators for providing visual indications to approaching traffic |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3708221A (en) * | 1970-04-02 | 1973-01-02 | Anchor Hocking Corp | Aspheric lens and method of manufacture |
DE2616298C2 (en) | 1976-04-13 | 1982-05-27 | Siemens AG, 1000 Berlin und 8000 München | Arrangement for the directed emission of light in character display devices |
NL7806073A (en) | 1978-06-05 | 1979-12-07 | Philips Nv | DEVICE FOR DISPLAYING TRAFFIC SYMBOLS. |
DE8611144U1 (en) * | 1986-04-23 | 1987-02-26 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
JPH0354592A (en) | 1989-07-24 | 1991-03-08 | Seiko Epson Corp | Projection type display device |
DE4040567C1 (en) * | 1990-12-19 | 1992-06-17 | Dambach-Werke Gmbh, 7560 Gaggenau, De | |
DE4225139A1 (en) * | 1992-07-30 | 1994-02-03 | Pintsch Bamag Ag | Indicating road sign esp. for road traffic with multiple of illuminated points - representing varying symbols and/or texts and at least one optical system, e.g. combination of lenses, is provided at light output end of each illumination point |
DE4225323C1 (en) * | 1992-07-31 | 1993-05-06 | Schott Glaswerke, 6500 Mainz, De | |
GB2286899A (en) | 1994-02-28 | 1995-08-30 | Eev Ltd | Plano-convex lens for an optical fibre |
DE29809799U1 (en) | 1998-05-30 | 1998-09-10 | Dambach Werke Gmbh | Illuminated display device for road traffic |
-
1998
- 1998-05-30 DE DE19824425A patent/DE19824425A1/en not_active Ceased
-
1999
- 1999-04-14 CA CA002333500A patent/CA2333500A1/en not_active Abandoned
- 1999-04-14 DE DE59900986T patent/DE59900986D1/en not_active Expired - Fee Related
- 1999-04-14 US US09/701,690 patent/US6419376B1/en not_active Expired - Fee Related
- 1999-04-14 EP EP99919231A patent/EP1082714B1/en not_active Expired - Lifetime
- 1999-04-14 BR BR9910841-0A patent/BR9910841A/en not_active Application Discontinuation
- 1999-04-14 WO PCT/EP1999/002506 patent/WO1999063510A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9963510A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2333500A1 (en) | 1999-12-09 |
WO1999063510A1 (en) | 1999-12-09 |
DE59900986D1 (en) | 2002-04-18 |
BR9910841A (en) | 2001-02-20 |
EP1082714B1 (en) | 2002-03-13 |
US6419376B1 (en) | 2002-07-16 |
DE19824425A1 (en) | 1999-12-09 |
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