Traffic signal installation comprising LED-light source

A light source and power supply technology, applied in the field of LED light sources, can solve problems such as increased failure probability of power supply circuits, and achieve the effects of reduced continuous operating costs, halved maintenance costs, and improved efficiency

Inactive Publication Date: 2006-10-11
莫妮卡・西金尔
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the transformer power supply of LEDs selected in US-A-5,850,126 and DE 197 29 690 A1, this LED power supply has the obvious disadvantage that the probability of failure of the power supply circuit is significantly increased, which is due to the fact that it is used in traffic signals. Security reasons come with a big downside

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Traffic signal installation comprising LED-light source
  • Traffic signal installation comprising LED-light source
  • Traffic signal installation comprising LED-light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] figure 1 An LED light source 2 for a traffic signal device according to the invention is shown, which has a plurality of light-emitting diodes (LEDs) 4 connected in series, which in turn are connected in series with a coil 6 . A freewheeling diode 8 is connected in parallel with the LEDs and the coil 6 in such a way that the conduction direction of the freewheeling diode is opposite to that of the LEDs 4 . A fast electronic switch 10 is provided, which is supplied with a pulse sequence 14 by a pulse generator 12 , connected in series to the LEDs 4 , the coil 6 and the freewheeling diode 8 connected in parallel thereto. If these LEDs 4 are not used, but other consumers are used, such as halogen lamps, these lamps have no certain conduction direction, so a blocking diode can be additionally connected in series with the consumer, so that the conduction direction of the consumer is determined.

[0059] The fast electronic switch 10 itself can be, for example, a transistor ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A traffic signal device having an LED light source (2), having: input terminals (38, 40) for connecting to a power source; and at a potential between a high potential (16) and a low potential (18): a plurality of LEDs (4), they are provided with at least two series branches of multiple LEDs connected in parallel; a coil (6), which is connected in series with the LED (4); a freewheeling diode (8), which is connected to the LED (4) and The coil (6) is connected in parallel, and its conduction direction is opposite to that of the LEDs (4); and a fast electronic switch (10), which is connected to the LEDs (4), the coil (6) and to these LEDs (4) ) and the freewheeling diode (8) connected in parallel to the coil (6) are connected in series; and a pulse transmitter (12), which is connected to the fast electronic switch (10), and generates a fast electronic switch (10) to open and closed pulses, wherein the pulse transmitter (12) is a pulse width modulator in the form of an integrated component.

Description

technical field [0001] The invention relates to a traffic signal device with an LED (Light Emitting Diode) light source, and in particular to an LED light source which has a low-loss constant current supply for the LED. Background technique [0002] The use of traffic signal devices is expanding globally. In principle, the term "traffic signal device" is defined broadly in relation to the present application. This involves street and rail traffic signaling as well as the lighting of waterways and runways. For street traffic signal devices, in addition to typical signal devices, such as traffic lights, it also includes luminous traffic guidance systems and traffic signs. [0003] Such traffic signal installations are usually operated by regional or state-owned agencies, in which, besides the costs for the initial installation, the costs for operation and maintenance also play a significant role. In the case of such traffic signal installations using conventional incandesce...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B39/04G08G1/095H05B44/00
CPCH05B45/10Y02B20/30H05B45/3725G08G1/095
Inventor 埃德蒙·福尔拉特
Owner 莫妮卡・西金尔
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap