Reliability Assessment of Light-Emitting Diode Packages With Both Luminous Flux Response Surface Model and Spectral Power Distribution Method

Chen, Wei; Fan, Jiajie; Qian, Cheng; Pu, Bin; Fan, Xuejun; Zhang, Guo Qi

doi:10.1109/access.2019.2916878

Cited by 19 publications

(12 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is the case for lighting. A too straightforward conception of lighting could lead authorities, engineers, and particulars to focus on making it more sustainable through introduction of more efficient light sources and technologies [1][2][3][4], decrease of illumination levels and light pollution [5][6][7][8][9], and optimization of lighting installations [10][11][12][13]. That is what we have classically called "sustainable lighting".…”

Section: Introductionmentioning

confidence: 99%

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

Peña-García

Salata

2020

Sustainability

View full text Add to dashboard Cite

In the last decades, lighting has evolved from a branch of engineering ensuring safety and performance in indoor and outdoor installations, to a key discipline interacting with a wide spectrum of fields and having a deep impact on our daily lives. Although this evolution also applies to other areas of knowledge, the special features of lighting make its potential and also its limitations different. It is not the typical field where a well-established mathematical framework allows a departure from well-defined input and identifying clear effects and conclusions. The reason is that lighting is a field dealing with the interaction between a physical phenomenon and a physiological and psychological system, the human being. In addition to the complexity of its basis, the relationship between lighting and sustainability has become stronger in recent years. This relationship is bi-directional in some cases: on one hand, advanced societies require more and more complex lighting installations, which means high energy consumption, use of raw materials, financial costs, manufacturing and maintenance processes, waste and emissions to the atmosphere. On the other hand, good lighting has an impact on issues like productivity, well-being, happiness, disease avoidance, safety, and many other qualitative aspects whose direct or indirect impact on sustainability is remarkable. This work will analyze how lighting can give answers to questions related to sustainability, not only from the classic topics of energy consumption and waste management, but from a wider and global perspective. The results of these works are analyzed, and the basis of the new framework of total lighting, discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

Peña-García

Salata

2020

Sustainability

View full text Add to dashboard Cite

show abstract

“…Normally, LED converts a part of electric energy to light, meanwhile, most of electric energy is converted to heat leading to high junction temperature. The luminous efficacy of LED is always deteriorated when it operates under high temperature and high current condition [14]. With increase the current of LED, more electric energy is consumed as its efficiency droop effect.…”

Section: Introductionmentioning

confidence: 99%

Dynamic prediction of optical and chromatic performances for a light-emitting diode array based on a thermal-electrical-spectral model

Fan¹,

Chen²,

Yuan³

et al. 2020

Opt. Express

Self Cite

View full text Add to dashboard Cite

Light-emitting diode (LED) arrays have attracted increased attention in the area of high power intelligent automotive headlamps because of their superiority in disposing of the power limit of an individual LED package and controllably luminous intensity and illumination pattern. The optical and chromatic performances of an LED array do not equal to the sum of individual LED packages' performances, as the thermal interactions between individual LED packages can't be ignored in the actual application. This paper presents a thermal-electrical-spectral (TES) model to dynamically predict the optical and chromatic performances of the LED array. The thermal-electrical (TE) model considering the thermal coupling effect in the LED array is firstly proposed to predict the case temperature of each individual LED package, and the Spectral power distributions (SPDs) of individual LED package is then decomposed by the extended Asym2sig model to extract the spectral characteristic parameters. Finally, the experimental measurements of the designed LED arrays operated under usage conditions are used to verify the TES model. Some validation case studies show that the prediction accuracy of the proposed TES model, which is expressed as a quadratic polynomial function of current and case temperature, can be achieved higher than 95%. Therefore, it can be concluded that this TES model offers a convenient method with high accuracy to dynamically predict the optical and chromatic performances of LED arrays at real usages.

show abstract

“…Such methods replace the performance function with a surrogate model which can improve the computational efficiency evidently. The surrogate models include Support Vector Machine [11,12], Response Surface [13,14], Neural Networks [15], Polynomial Chaos Expansions [16], Kriging [17][18][19], and so on.…”

Section: Introductionmentioning

confidence: 99%

An Efficient and Time-Saving Reliability Analysis Strategy for Complex Mechanical Structure

et al. 2020

View full text Add to dashboard Cite

With the development of production technology, the mechanical structure has become more and more complicated, which makes the simulation process of the corresponding computer model very time-consuming. As a result, the reliability analysis needs to consume huge time resources. To deal with this problem, an improved method, which balances the accuracy of failure probability and the efficiency of computation, is proposed. The novelty of the proposed method is the use of an efficient point selection strategy, the k-means algorithm, and the constraint of correlation among the training points. The k-means algorithm can divide the candidate points into a few groups. Therefore, we can update the Kriging model by selecting several sample points which have large contributions to improve the accuracy of failure probability in each iteration. Meanwhile, a constraint is applied to control the relative location among points of DoE to avoid redundant information. The efficiency and accuracy of the proposed method are verified through two numerical examples. Finally, a type of artillery coordination system as a representative of the complex mechanisms is mentioned. And the proposed method is applied to calculate the reliability of the position accuracy of the coordination process, which proves the significance of the proposed method in engineering practice.

show abstract

Reliability Assessment of Light-Emitting Diode Packages With Both Luminous Flux Response Surface Model and Spectral Power Distribution Method

Cited by 19 publications

References 36 publications

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

Dynamic prediction of optical and chromatic performances for a light-emitting diode array based on a thermal-electrical-spectral model

An Efficient and Time-Saving Reliability Analysis Strategy for Complex Mechanical Structure

Contact Info

Product

Resources

About