05 Aug 2011   |   1:15 pm - 5:30 pm,   Seminar Room 1, Institute of Materials Research and Engineering (IMRE), 3, Research Link, Singapore 117602

Seminar on LED and Solid State Lighting: Technologies, Challenges and Opportunities

National Metrology Centre (NMC), Institute of Materials Research and Engineering (IMRE), and Singapore Institute of Manufacturing Technology (SIMTech) co-organised this seminar to expound on the latest technical developments, challenges and future trends, as well as the R&D activities and facilities in the research institutes. Topics covered include LED lighting standards, measurement technologies and standards, and characterisation and reliability studies of LED chips, devices and luminaries.  A total of 170 participants from industry, academic institutions and government agencies attended the seminar. Some of the presentation materials are available for download (please click the Download link available in the Programme under each speaker). If the download link is not available for the speaker, please contact the speaker directly with the email address provided.

The seminar was supported by Optics & Photonics Society of Singapore and sponsored by Brightlite, CREE, Konica Minolta, and Philips Lumileds.

IMRE, NMC and SIMTech are organising a Roundtable discussion to engage and get feedback from industry, to determine the technological needs and gaps in current capabilities. Please contact us before 19 August 2011 if you are interested in participating and let us know what areas you are keen to be involved in for the Roundtable discussion.

NMC is also planning for a Competency Centre on Solid State Lighting and LED measurement and characterization to further support the LED lighting technology development in Singapore.  We welcome ideas for collaboration, and suggestions about services needed by your company or organisation.

Contact Us 
For technical enquiries, please contact: 

  • Mr Liu Yuanjie, email: (NMC)

  • Dr Soh Chew Beng, email: IIMRE)

  • Mr Joseph Chen, email: (SIMTech)

For industry matters, please contact:

  • Mr Ng Tong Jin, email: (NMC)

  • Mr John Tan Cheng Soon, email: (IMRE)


1.15 pm


1.45 pm

Opening Address
By Ms Tan Siew Leng, 
Head, Optical Metrology, National Metrology Centre, A*STAR

1.55 pm

IMRE Overview and Introduction
By Prof. Chua Soo-Jin, Deputy Chair (External Relations) & Principal Scientist, Institute of Materials Research and Engineering, A*STAR

2.10 pm

Current Status, Future Trends, Market Opportunities and Characterisation of LEDs for SSL Applications [ Download material ]
By Mr Khoo Lean Huat, Douglas,
Senior Sales Manager of ASEAN & ANZ, Philips Lumileds Lighting

Philips Lighting expects that approximately 90% of conventional lighting will be converted to LED illumination in less than 10 years.  While there is significant volume of LED use, especially in retrofit bulbs, office, retail, hospitality, outdoor area and architectural lighting, the market penetration in 2010 is less than 10%.  To accelerate the adoption of solid state lighting, industry needs products that can perform at real operating temperatures and useful lifetime, increasing lm/$ and improved quality of light for each individual market segment.

2.30 pm

LED Lighting Standards Update [ Download material ]
By Mr Kuan Yew Cheong,
Senior Technical & Application Manager for LED component business, Cree Asia-Pacific Ltd

Cree’s presentation will give an update on standards, both LED & fixtures around the world, and suggest ways of setting robust standards to ensure suppliers deliver high reliability fixtures (e.g. street light standards).

2.50 pm

Introduction to BrightLite High Power LED Light Engine [ Download material ]
By Mr Koh Fook On,
Director of Engineering, BrightLite Systems Pte Ltd

Thermal design on high intensity LED lighting is one of the challenges faced by LED chip makers and luminaire manufacturers.  Demand for energy saving luminaries is rapidly increasing, and ways to shorten time-to-market for new product launches are needed, with stable product reliability and sustainable lumen performance. The Ultra-BrightLite™ LED Light Source is an innovative full metallic designed to improve the overall lighting system's thermal efficiency as it effectively reduces the LED junction temperature by allowing heat to be dissipated in three dimensions (3D thermal design). With this light engine, lighting product designers have a very low cost, high reliability & complete LED solution to shorten the product development cycle.

3.10 pm

Standards and Technologies available at NMC for LED Measurements [ Download material ]
By Mr Liu Yuanjie,
Senior Metrologist, National Metrology Centre, A*STAR

Several types of light measurements are applicable to LEDs, which can be possibly achieved by different measurement technologies and standards.  For instance, the total luminous flux of a LED lamp can be measured by means of an integrating sphere photometer calibrated by a total flux standard lamp, or alternatively by a goniometer with its detector calibrated using a spectral irradiance standard lamp.  This presentation will cover LED measurement standards and technologies currently available in NMC, as well as a research project on new standards and facilities for the measurement and characterisation of LEDs and related products.

3.30 pm

Tea Break

3.55 pm

LED Performance Characteristics and their Measurements
By Prof. Chua Soo-Jin, Deputy Chair (External Relations) & Principal Scientist, Institute of Materials Research and Engineering, A*STAR. [ ]

The basic components of the lamp for solid-state Lighting are the high brightness LEDs made from Gp-III Nitrides and phosphors. To ensure optimal performance of the device, the LED wafers are characterised before final dicing and packaging and the final packaged chips are tested for their optical and electrical performance. Some key parameters in materials characterisation and packaged LED measurements are: the internal quantum efficiency, the crystal quality of epitaxial layers and contact resistance of the metallisation; and current-voltage and light-current of the diode, device operating temperature and electroluminescence spectrum. Other parameters at device testing are: efficiency droop, spectral shift with current pumping and luminous efficacy. At the lamp level, the visual impact of the optical output is measured in terms of the colour rendering index, correlated colour temperature and colour coordinates. In this talk, the significance of the various parameters and their impact on the performance of the lamp will be discussed.

4.15 pm


Methodology of Design-in Reliability for Solid State Lighting Luminaries
By A/P Tan Cher Ming, School of Electrical & Electronic Engineering, Nanyang Technological University / Singapore Institute of Manufacturing Technology (SIMTech), A*STAR. [ ]

The reliability of a luminaire using ultra-bright LED is mainly dependent on the reliability of the LED and the Driver circuit in metal core PCB.  However, there is lack of reliability studies of the luminaire. In this talk, the various failure mechanisms of LED will be presented, and its life dependency on temperature, moisture and power cycling will be discussed.  The importance of heat sink performance on the LED life will also be shown.  For the driver circuit, the method of design for reliability of PCB through components layout and components’ size as well as fan speed will be shown using a flyback converter as an example.

4.40 pm

GET-Up Innovate Through Technology Upgrade [ Download material ]
By Dr Lim Ee Meng, Deputy Director, Growing Enterprise Technology Upgrade (GET-Up) Programme, A*STAR

The Growing Enterprise Technology Upgrade (GET-Up) Programme is a multi-agency effort led by the Science and Engineering Research Council (SERC) of A*STAR to boost the competitiveness of local technology-based enterprises through technology upgrading. The programme comprises of 3 technical assistance schemes that are designed to support local companies which researchers may participate in. This presentation will provide a complete picture and understanding of the GET-Up programme.  Of particular interest may be the Technology for Enterprise Capability Upgrading (T-Up) expert-secondment scheme, which is an excellent platform for researchers to collaborate with industry and/or to enhance one’s industrial research experience. To date, A*STAR has seconded 304 researchers to 186 local companies.

5.00 pm

Q&A Session

5.30 pm