In current technology, white light generation from a light emitting diode (LED) can be achieved by combining the lights from three fundamental colors, namely, red, green and blue (RGB), of LEDs or by coating a phosphor layer onto the surface of a LED chip. The first method involving the RGB color mixing technique requires a complicated electrical circuit design for the control of light intensity and uniformity on the three different colors of LEDs and hence increases the costs of manufacturing. The second method is implemented by coating a layer of yellow phosphor on a blue LED chip for white light illumination. The quality of generated white light heavily depends on the packing density, the thickness and the uniformity of the phosphor coating. There have been some coating methods available in the industry. Each one of them has its own pros-n-cons. In the present study, a new yellow phosphor coating method by screen-printing on blue LED arrays is developed. Compared with conventional coating methods, this screen-printing method is considered relatively simple and rather effective. The newly developed method and the results of prototyping are introduced in this paper in detail.
Skip Nav Destination
ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
0-7918-4277-0
PROCEEDINGS PAPER
Screen-Printing of Yellow Phosphor Powder on Blue Light Emitting Diode (LED) Arrays for White Light Illumination
K. H. Lee,
K. H. Lee
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Search for other works by this author on:
S. W. Ricky Lee
S. W. Ricky Lee
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Search for other works by this author on:
K. H. Lee
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
S. W. Ricky Lee
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Paper No:
IPACK2007-33971, pp. 19-24; 6 pages
Published Online:
January 8, 2010
Citation
Lee, KH, & Lee, SWR. "Screen-Printing of Yellow Phosphor Powder on Blue Light Emitting Diode (LED) Arrays for White Light Illumination." Proceedings of the ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASME 2007 InterPACK Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 19-24. ASME. https://doi.org/10.1115/IPACK2007-33971
Download citation file:
7
Views
0
Citations
Related Proceedings Papers
Related Articles
Thermal Design for Microminiaturized Circuitry
J. Eng. Ind (February,1962)
Phosphor Concentration Effects on Optothermal Characteristics of Phosphor Converted White Light-Emitting Diodes
J. Electron. Packag (September,2010)
Behavior of the Two-Phase Mushy Zone During Freeze Coating on a Continuous Moving Plate
J. Heat Transfer (February,2002)
Related Chapters
Natural Gas Transmission
Pipeline Design & Construction: A Practical Approach, Third Edition
Optimization of an Irregular 2D Packing Problem by a Genetic-Based Heuristic Algorithm
International Conference on Computer and Automation Engineering, 4th (ICCAE 2012)
The Thermo —Mechanical Analysis of Mechanical Packing (SEAL), Using Finite Element Method (FEM) — Results and Conclusions
International Conference on Mechanical Engineering and Technology (ICMET-London 2011)