Events

 
TRS-LED Seminar Series
TRS-LED Seminar Series

Titles & Speakers:
1) Understanding the Brightness, Color, Thermal, and Electrical Performances of LED and their Relationship to Efficiency of SSL (SEQUEL)
by Prof. Ricky Lee
    Professor of Mechanical Engineering, HKUST
    Director of Center for Advanced Microsystems Packaging
    Director of HKUST LED-FPD Technology R&D Center at Foshan

2) Remote Phosphor Configured Wafer Level LED Packaging and Correlated Ray Tracing Optical Simulation
by Miss Kimmy Liu
    MPhil Candidate
    Department of Mechanical Engineering, HKUST


Date
 :  26 Jul 2013 (Fri)
Time
 :  3pm - 4:30pm
Venue  :  ECE Conference Room 2512, 2/F (Lift 25/26), HKUST

Abstracts:

1) Understanding the Brightness, Color, Thermal, and Electrical Performances of LED and their Relationship to Efficiency of SSL (SEQUEL)
LED has been claimed as the 4th generation light source which has the major merits of rather low power consumption and very long service life. Typical specifications include 150 lm/W and 50000 hours for luminous efficacy and operating life, respectively. However, it appears that not all people understand what these specifications refer to and imply. As a result, inappropriate expectation may occur due to misperception. Consequently, such misunderstanding may hinder the propagation of LED for solid-state lighting (SSL). In this presentation, the essence of LED packaging for SSL will be reviewed. Various topics on efficiencies and their corresponding loss channels at the LED package and luminaire levels will be discussed. Emphasis will be placed on the trends of LED packaging in order to achieve the intended performance.
 
2) Remote Phosphor Configured Wafer Level LED Packaging and Correlated Ray Tracing Optical Simulation
Phosphor converted LED (pc-LED) is the most popular LED configuration for white light illumination. The current phosphor configurations include dispersed phosphor, conformal phosphor and remote phosphor. Remote phosphor has been proved with uniform optical distribution, reduced chip absorption and better thermal stability; currently it is mainly implemented in system level applications, but this also increases the amount of phosphor material in use. Package level remote phosphor reduces phosphor consumption and is compatible with the wafer level LED packaging method. In this presentation, package level remote phosphor deposition methods for wafer level LED packaging are proposed. The LED panels show high fabrication efficiency and well performed optical outcomes. In addition, a ray tracing optical simulation tool is used to evaluate the optical performance of the proposed packages. The effects of several key parameters in simulation are also discussed in this presentation.

Biography:

Prof. Ricky Lee
Ricky Lee received his PhD degree from Purdue University in 1992. He joined the Hong Kong University of Science & Technology (HKUST) in 1993. During his career of tenure-track faculty at HKUST, Dr Lee once was on secondment to serve as Chief Technology Officer of Nano & Advanced Materials Institute (NAMI) for two and a half years. Currently Dr Lee is Professor of Mechanical Engineering and Director of Center for Advanced Microsystems Packaging (CAMP) at HKUST. He also has a concurrent appointment as Director of HKUST LED-FPD Technology R&D Center at Foshan, Guangdong, China. Due to his technical contributions, Dr Lee received many honors and awards over the years. In addition to being the recipient of nine best/outstanding paper awards and three major professional society awards, Dr Lee is Fellow of IEEE, ASME, and Institute of Physics (UK). He is also a Distinguished Lecturer of the IEEE Components, Packaging, and Manufacturing Technology (CPMT) Society. Furthermore, Dr Lee was elected President of IEEE CPMT Society in 2011 and is serving for the term of 2012-2013.
 
Miss Kimmy Liu
Kimmy Liu received her bachelor degree in Dalian University of Technology, 2011. At present, she is an MPhil candidate in the group of Prof. Ricky Lee in mechanical engineering department of HKUST.
 

Light refreshment will be served at the end of the seminar.
(The seminar is FREE while registration is needed. Please register HERE)