Supercharge Your Innovation With Domain-Expert AI Agents!

Lighting device

a technology of light emitting diodes and lighting devices, which is applied in outdoor lighting, lighting heating/cooling arrangements, electric variable regulation, etc., can solve the problems of low light output, low maintenance efficiency, and low use value of lighting devices, and achieves a fraction of the cost of leds of typical hid lamps

Inactive Publication Date: 2005-06-09
GESTION PROCHE
View PDF18 Cites 71 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024] As an example: data provided by Toshiba, a major LED manufacturer, for its TLYH Amber LED series (such as could be used with the lighting device) indicates that at 25 deg. C. the LED luminosity will degrade by 50% in 170,000 hours when used at lOmA, and in 140,000 hours when used at 20 mA. If the the LED were used at 20 mA only half the time (thereby getting the same average light as using it continuously at 10 mA), it would take 280,000 hours to reach the 50% degradation point, lasting substantially longer than the 170,000 hours of the continuous 10 mA option. It can therefore be seen that reducing usage time even while compensating with increased current will provide a slower degradation rate.
[0066] a dirt detection means being configured to detect the amount of dirt on the outer surface of the lighting device and communicating this amount to the calculation means so that the calculation means may compensate for the dirt by increasing the light provided by the lighting device.
[0071] a dirt detection means being configured to detect the amount of dirt on the outer surface of the lighting device and communicating this amount to the calculation means so that the calculation means may compensate for the dirt by increasing the light provided by the lighting device;

Problems solved by technology

A problem with current tunnel lighting lamps is with lifespan.
In a typical tunnel lamp which uses one or maybe two illumination sources, the lighting device can easily become unuseable should the illumination source break down.
Thus maintenance of lighting devices can become costly and time consuming.
While an individual LEDs is on its own not sufficient to provide lighting for a tunnel, LEDs only cost a fraction of what a typical HID lamp would cost.
They do, however, not have features which allow for a constant luminosity to be maintained over an extended lifespan.
In the context of roadway or tunnel lighting, the use of PWM to control the LED intensity may be problematic.

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
  • Lighting device
  • Lighting device
  • Lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0099]FIG. 1 shows a: lighting device 1 of the invention, having a lighting device casing 2 with a transparent face 3 in front of a LED array 10. To ensure long-term reliability the casing 2 is environmentally sealed, so that dust and water cannot penetrate inside.

[0100] The casing 2 has a shape such that when the lighting device 1 is installed in its normal position (e.g. on the ceiling of a tunnel facing downwards), its light emission axis 4 is tilted by an angle 5 from the vertical axis 6, towards the incoming traffic. This angle 5 can range from −90 to +90 degrees (e.g. 0 to 80 degrees). Light distribution simulations show that having the angle 5 in the range of 60 to 70 degrees allows for optimization of the illuminance. It should of course be noted that any sufficient angle may be used.

[0101] In the embodiment of the invention shown in FIG. 2, the lighting device 1 has as its main illumination source of an array of individual LEDs 10. The LEDs 10 are assembled on one or more...

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

An LED lighting device is provided which is capable of being connected to a network and being controlled by a host computer also connected to the network. The lighting device has several lifespan expanding features such as including several extra LEDs such that as the LEDs of the lighting device degrade over time more LEDs can be turned on thus allowing a constant luminosity to be maintained.

Description

BACKGROUND OF THE INVENTION [0001] The current invention is an light emitting diode (herein referred to as LED) lighting device having multiple features designed to allow the lighting device to maintain luminosity as measured in candelas, over its lifespan. The invention is also designed so that multiple lighting devices can be connected in a network controlled by a host computer, such that the general luminosity over an area (e.g. a tunnel) can be controlled. [0002] Traditionally, roads and tunnel lighting devices have used uses HID (High-Intensity Discharge) lamps, powered with high-voltage (e.g. 300 VAC to 400 VAC). [0003] Existing roadway standards divide the length of the tunnel into a number of regions. Each region requires a lighting intensity (sometimes herein referred to as luminosity) that increases as it is nearer the entrance / exit points (because of the presence of higher illumination from the sun), and decreases towards the middle of the tunnel. As an example, a typical...

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 Applications(United States)
CPCF21S8/04F21W2131/101F21Y2101/02F21Y2105/001H05B33/0803H05B33/0827F21V29/763H05B33/0851H05B33/0893H05B37/0245H05K1/14Y02B20/48H05B33/0842F21Y2105/10F21Y2115/10H05B45/58H05B45/46H05B47/20Y02B20/40H05B45/30H05B45/12H05B47/175
Inventor CHEVALIER, DANIELMARTEL, ALAIN
Owner GESTION PROCHE
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com