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Tri-Functional Headlamp System with Low Power Consumption Lecture of Rainer Neumann, Visteon at SAE PDF Print E-mail
Monday, 26 April 2010
DVN publish today the report on SAE Show. As a sample, we reproduce a part of one of the lectures. It is the lecture of Rainer Visteon from Visteon, who presents a new LED headlamp with low beam, high beam and DRL.
The multifunctional design achieves an optimum balance between requested light performance and challenges to reduce power consumption and offer a styling differentiation

General features of the headlamp

 

Optical system efficiency >60%
Power Consumption 19w low, 14w high beam
No active cooling elements (fans)
Replaceable light sources for low and high beam
CCT 5200°K
Weight 2-3 kg
No headlamp Cleaning device required
Dimensions of low beam: 130mm x 50mm

LED low beam lighting performance
The low beam is very homogeneous and widely spread.
Hot Spot = 32 Lx
Luminous Flux = 618 Lm
Lighting output between halogen (300Lm-500Lm) and HID (800Lm-1,200Lm)

Low beam reflector : Butterfly concept


LED high beam lighting performance

The beam is very contrasted in order to get the best visibility
The efficiency is around 67%
Hot Spot = 98 lx
Luminous Flux = 673 lm
Two Concepts are developed to answer styling and packaging requests:

Register to read more...
 

Editorial

Lighting Research for a human future PDF Print E-mail
Monday, 19 April 2010
From Pr Khanh, DUT Darmstadt
In the current product development we are speaking on the reduction of power consumption to reduce CO 2 emissions and on the utilization of the adaptive driving beam. From the view of a scientist, the research of today is the basis for the technological development in the next future for which the following aspects can be considered:

Lighting technology taking into account the demographical development :
The elderly population is increasing in Western countries at a dramatic rate. In the USA, according to the U.S. Census Bureau projection (2005), by 2030 growth in the population aged over 65 will outstrip American population growth by a factor of 3.5. Compared to 36 mill. elderly in 2004 (12% of the population), the forecasted number is 70 mill. (20%) by 2030 and 82 mill. (21%) by 2050. It is evident that the driving population also becomes older. Indeed, the average driver's age in the USA is 57 years. In European countries, most likely, it is not very different. In Germany, according to a recent B&D-Forecast study, those aged 60+ make up 29% of new-car customers; and of them, 1/3 are aged 70 or older. This has implications for road safety as older drivers are reported to have a higher number of crashes per distance traveled than both young and middle-aged drivers. For the general automotive industry and the automotive lighting divisions, these statistics imply that when designing a new car model, effects of aging in its potential purchasers should be taken into account.

Optimisation of the lamp spectra :
Currently, the evaluations of the lighting products (HID-lamps, LEDs) are based on the knowledge of the photopic vision with a luminance greater more than 10 cd/m 2 . For street lighting and automotive lighting conditions in the dark hours, other evaluation mesopic systems have to be used in order to optimize the spectra of the HID-lamps (25 W and 35 W) and white LEDs for improving the conspicuity of the objects on and near the road and the road marking. In this context, we all are at the beginning of the process.

Research for rear lamp products and interior illumination
At the moment, it seems to be, that we have often spoken about headlamp lighting developments. In the current SAE and ECE-standards for rear lamps, we can find luminous intensity values to be fulfilled independent on the weather and light conditions as like independent on the road situations. The research on the adaptive rear lamp system and on the interior lighting for improvement of well-being and contrast vision of the drivers is necessary in the next future.

In this context, the automotive industry and the university science shall cooperate closer in the next years.

Your sincerely




Tran Quoc Khanh, Laboratory for Lighting Technology/ DUT Darmstadt, Germany

 
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