Solid state lighting — a world of expanding opportunities at LED 2002

Mills, Alan

doi:10.1016/s0961-1290(03)80123-0

Cited by 28 publications

(6 citation statements)

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“…High-power LED is promising candidate for fourth-generation lighting source due to its high brightness, long life, energy-saving, bright in color, and so on [1][2][3][4][5]. The reliability of electronics restricts the wider application of high-power LED.…”

Section: Introductionmentioning

confidence: 99%

Effects of Die-Attach Quality on the Mechanical and Thermal Properties of High-Power Light-Emitting Diodes Packaging

Zhang

Yin

2017

Advances in Materials Science and Engineering

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The reliability of high-power light-emitting-diode (LED) devices strongly depends on the die-attach quality because voids may increase junction temperature and total thermal resistance of LED devices. Die-attach material has a key role in the thermal management of high-power LED package by providing low-contact thermal resistance. Thermal and mechanical analyses were carried out by experiments and thermal simulation. The quantitative analysis results show that thermal resistance of die-attach layer (thermal resistance caused by die-attach material and voids in die-attach layer) plays an important role in total thermal resistance of high-power LED packaging according to the differential structure function of thermal transient characteristics. The increase of void fraction in die-attach layer causes the increases of thermal resistance of die-attach layer; the thermal resistance increased by 1.95 K/W when the void fraction increased to 62.45%. The voids also make an obvious influence on thermal stress and thermal strain of chip; the biggest thermal stress of chip was as high as 847.1 MPa compared to the 565.2 MPa when the void fraction increases from being void-free to 30% in the die-attach layer.

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Section: Introductionmentioning

confidence: 99%

Effects of Die-Attach Quality on the Mechanical and Thermal Properties of High-Power Light-Emitting Diodes Packaging

Zhang

Yin

2017

Advances in Materials Science and Engineering

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“…road lighting. 1 The development of high-power LEDs for road lighting is growing continuously owing to its greater energy efficiency, long operating life and light control. LED luminaires also have the potential of increasing illumination uniformity and reducing glare, which improves both the visual comfort and the visual discrimination ability of car drivers.…”

Section: Introductionmentioning

confidence: 99%

Optical design of a road lighting luminaire using a chip-on-board LED array

Shu

Chen

et al. 2016

Lighting Research & Technology

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Compared to traditional street lighting technologies, light emitting diode (LED) luminaires have the potential advantages of increased energy efficiency, longer operating life and better light distribution. In this paper, we present a new highquality LED road lighting luminaire. The luminaire shows high optical efficiency, high optical utilization factor and low glare, and illuminates the street with high uniformity. We verify its feasibility by Monte Carlo ray-tracing and test its real performance through a prototype model of the luminaire. The results show that it can achieve the expected performance.

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“…LEDs have many advantages over conventional light sources used in automotive applications, such as good reliability, energy and space savings, robustness, environmentally friendly and long life. 1 In recent years, following the development of solid-state lighting technology, the luminous efficacy of a single, high-brightness LED device has risen to more than 180 lm/W in mass production. 2 Compared with traditional headlamps, such as halogen headlamps and xenon headlamps, high-brightness LEDs only require a power consumption of about 10 W to achieve a total luminous flux of more than 1500 lm, which is sufficient for a low-beam module.…”

Section: Introductionmentioning

confidence: 99%

Design of an LED-based headlamp low-beam system using combined prisms

Qiu

Wang

et al. 2014

Lighting Research & Technology

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An effective high-efficiency LED headlamp system for automotive low-beam lighting which consists of parabolic reflector, compound lenses and combined prisms, is introduced in this paper. Using a single, high-brightness LED, the illumination requirements for a headlamp low beam specified by UNECE regulation 'Addendum 111: Regulation No. 112 Revision 2' can be achieved. On the test screen at a distance of 25 m, simulation results as well as testing results for the prototype meet the requirements of the UNECE regulation for all specified regions and key points.

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Solid state lighting — a world of expanding opportunities at LED 2002

Cited by 28 publications

References 0 publications

Effects of Die-Attach Quality on the Mechanical and Thermal Properties of High-Power Light-Emitting Diodes Packaging

Effects of Die-Attach Quality on the Mechanical and Thermal Properties of High-Power Light-Emitting Diodes Packaging

Optical design of a road lighting luminaire using a chip-on-board LED array

Design of an LED-based headlamp low-beam system using combined prisms

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