SE452691B - TRAFFIC LIGHTING OR OTHER LIKE SIGNAL LIGHTING - Google Patents
TRAFFIC LIGHTING OR OTHER LIKE SIGNAL LIGHTINGInfo
- Publication number
- SE452691B SE452691B SE8404978A SE8404978A SE452691B SE 452691 B SE452691 B SE 452691B SE 8404978 A SE8404978 A SE 8404978A SE 8404978 A SE8404978 A SE 8404978A SE 452691 B SE452691 B SE 452691B
- Authority
- SE
- Sweden
- Prior art keywords
- leds
- pulses
- lighting
- traffic
- drive
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
452 691 I enlighet med uppfinningen föreslås för nämnda syfte att drivorganen för lysdioderna skall vara inrättade att mata dessa med en serie drivpulser med en pulsrepetitionsfrekvens av c:a 20 - c:a 30 Hz. According to the invention, it is proposed for the said purpose that the drive means for the LEDs be arranged to supply them with a series of drive pulses with a pulse repetition frequency of about 20 - about 30 Hz.
Genom omfattande försök har det kunnat fastställas att man genom att förlägga pulsfrekvensen för lysdiodernas driv- pulser inom nämnda intervall kan uppnå en kraftigt förstärkt förmåga hos anordningen att tilldra sig uppmärksamhet från en person som till en början uppfattar det från anordningen ut- sända ljuset enbart med sitt perifera seende samtidigt som man kan undvika att nämnda ljus kommer att upplevas kraftigt blin- kande för personen i fråga då denne väl har fäst sin blick vid anordningen och observerar den med sitt centrala seende.Through extensive experiments, it has been possible to establish that by placing the pulse frequency of the LEDs' driving pulses within the said range, a greatly enhanced ability of the device to attract attention from a person who initially perceives the light emitted from the device can only be achieved with his peripheral vision at the same time as it can be avoided that said light will be experienced as strongly flashing for the person in question as he has fixed his gaze to the device and observes it with his central vision.
Enligt uppfinningen kan drivpulserna lämpligen ha en pulslängd motsvarande c:a 20 - c:a 60%, företrädesvis c:a 30 - c:a 50%, av periodtiden för nämnda pulser.According to the invention, the drive pulses may suitably have a pulse length corresponding to about 20 - about 60%, preferably about 30 - about 50%, of the period time for said pulses.
Uppfinningen beskrives nedan ytterligare under hänvis- ning till bifogade ritningar, som schematiskt åskådliggör en signalljusanordning enligt en såsom exempel vald utföringsform av uppfinningen, varvid fig. 1 visar ett blockschema över anordningen, medan fig. 2 visar ett spännings-tidsdiagram àskâdliggörande utseendet hos drivpulserna för de i anordningen ingående lys- dioderna.The invention is further described below with reference to the accompanying drawings, which schematically illustrate a signal light device according to an exemplary embodiment of the invention, Fig. 1 showing a block diagram of the device, while Fig. 2 shows a voltage-time diagram illustrating the appearance of the drive pulses for the LEDs included in the device.
Den i fig. l visade anordningen innefattar en uppsätt- ning lysdioder l0, vilka är anordnade i ett flertal parallell- kopplade grenar, var och en innehållande ett antal med varandra seriekopplade lysdioder. Samtliga lysdioder 10 kan lämpligen vara monterade intill varandra i en gemensam armatur. Denna kan, om anordningen är avsedd att bilda en för trafikljus avsedd lampenhet, med fördel vara utförd på i patentansökningen nr 83 06140-8 beskrivet sätt. Vidare bör samtliga lysdioder lämpligen vara av inbördes lika typ och anordnade att utsända ljus av en och samma färg.The device shown in Fig. 1 comprises a set of LEDs 10, which are arranged in a plurality of parallel-connected branches, each containing a number of LEDs connected in series with each other. All LEDs 10 can suitably be mounted next to each other in a common luminaire. This can, if the device is intended to form a lamp unit intended for traffic lights, advantageously be designed in the manner described in patent application No. 83 06140-8. Furthermore, all LEDs should suitably be of the same type and arranged to emit lights of one and the same color.
För drivning av lysdioderna 10 finns vid den i fig. 1 visade anordningen tre enheter ll, 12 och 13. Av dessa utgör 452 691 3 enheten ll en styrpulsgenerator, som matar styrpulser med förut- bestämd längd och pulsrepetitionsfrekvens till enheten 12, vil- ken utgör en drivenhet för lysdioderna 10 och matar dessa med en serie drivpulser med en pulslängd och pulsrepetitionsfrek- vens svarande mot pulslängden resp. pulsrepetitionsfrekvensen hos de från enheten ll erhållna styrpulserna. Den med 13 be- tecknade enheten utgör en konstantströmkälla som säkerställer att lysdioderna icke tillföres otillåtet hög ström.For driving the LEDs 10, the device shown in Fig. 1 has three units 11, 12 and 13. Of these, the unit 11 constitutes a control pulse generator which supplies control pulses of a predetermined length and pulse repetition frequency to the unit 12, which constitutes a drive unit for the LEDs 10 and supplies them with a series of drive pulses with a pulse length and the pulse repetition frequency corresponding to the pulse length resp. the pulse repetition frequency of the control pulses obtained from the unit II. The unit denoted by 13 is a constant current source which ensures that the LEDs are not supplied with an unauthorized high current.
I fig. 2 âskâdliggöres schematiskt utseendet hos de av drivenheten 12 avgivna drivpulserna för lysdioderna. Nämnda pulser utgöres såsom synes av en serie fyrkantpulser. Repeti- tionsfrekvensen för pulserna bör enligt uppfinningen uppgå till c:a 20 - c:a 30 Hz. Vidare bör pulserna ha en längd T1, upp- gående till c:a 20 - c:a 60%, företrädesvis c:a 30 - c:a 50%, av periodtiden T för nämnda pulser.In Fig. 2, the appearance of the drive pulses emitted by the drive unit 12 for the LEDs is schematically illustrated. Said pulses consist, as can be seen, of a series of square pulses. According to the invention, the repetition frequency of the pulses should amount to about 20 - about 30 Hz. Furthermore, the pulses should have a length T1, amounting to about 20 - about 60%, preferably about 30 - about 50%, of the period time T for said pulses.
Claims (2)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8404978A SE452691B (en) | 1984-10-04 | 1984-10-04 | TRAFFIC LIGHTING OR OTHER LIKE SIGNAL LIGHTING |
| DE19853535204 DE3535204A1 (en) | 1984-10-04 | 1985-10-02 | Traffic signalling device or other similar light signalling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8404978A SE452691B (en) | 1984-10-04 | 1984-10-04 | TRAFFIC LIGHTING OR OTHER LIKE SIGNAL LIGHTING |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE8404978D0 SE8404978D0 (en) | 1984-10-04 |
| SE8404978L SE8404978L (en) | 1986-04-05 |
| SE452691B true SE452691B (en) | 1987-12-07 |
Family
ID=20357239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8404978A SE452691B (en) | 1984-10-04 | 1984-10-04 | TRAFFIC LIGHTING OR OTHER LIKE SIGNAL LIGHTING |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3535204A1 (en) |
| SE (1) | SE452691B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4729076A (en) * | 1984-11-15 | 1988-03-01 | Tsuzawa Masami | Signal light unit having heat dissipating function |
| CA2078839A1 (en) * | 1991-09-25 | 1993-03-26 | Marc Hoffman | Double refraction and total reflection solid nonimaging lens |
| US5633629A (en) * | 1995-02-08 | 1997-05-27 | Hochstein; Peter A. | Traffic information system using light emitting diodes |
| US5661645A (en) | 1996-06-27 | 1997-08-26 | Hochstein; Peter A. | Power supply for light emitting diode array |
| WO1998037529A1 (en) * | 1997-02-19 | 1998-08-27 | Siemens Aktiengesellschaft | Data transmission device for traffic-guidance and traffic-information systems |
| US6570505B1 (en) | 1997-12-30 | 2003-05-27 | Gelcore Llc | LED lamp with a fault-indicating impedance-changing circuit |
| AU709702B3 (en) * | 1999-04-06 | 1999-09-02 | Pui-Hing Tsui | Improved ribbon decoration lighting structure |
| DE19918336A1 (en) | 1999-04-22 | 2000-11-02 | Sickinger Monika | Light source from several LEDs connected in series |
-
1984
- 1984-10-04 SE SE8404978A patent/SE452691B/en not_active IP Right Cessation
-
1985
- 1985-10-02 DE DE19853535204 patent/DE3535204A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE3535204A1 (en) | 1986-04-17 |
| SE8404978L (en) | 1986-04-05 |
| SE8404978D0 (en) | 1984-10-04 |
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| NAL | Patent in force |
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