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Engineering    2015, Vol. 1 Issue (2) : 170 -178
Research |
Progress in Understanding Color Maintenance in Solid-State Lighting Systems
Maryam Yazdan Mehr1,2,Willem Dirk van Driel1,G. Q. (Kouchi) Zhang1,()
1. Delft University of Technology, Delft 2600 AA, the Netherlands
2. Material Innovation Institute (M2i), Delft 2628 XG, the Netherlands

In this paper, progresses of color maintenance, also known as color shift, in solid-state lighting (SSL) systems are thoroughly reviewed. First, color shift is introduced and a few examples are given from different real-life industrial conditions. Different degradation mechanisms in different parts of the system are also explained. Different materials used as lenses/encapsulants in light-emitting diode (LED)-based products are introduced and their contributions to color shift are discussed. Efforts put into standardization, characterizing, and predicting lumen maintenance are also briefly reviewed in this paper.

Keywords light-emitting diode (LED)      color shift      lumen depreciation      lumen degradation     
Corresponding Authors: G. Q. (Kouchi) Zhang   
Just Accepted Date: 30 June 2015   Issue Date: 16 September 2015
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Maryam Yazdan Mehr
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Maryam Yazdan Mehr,Willem Dirk van Driel,G. Q. (Kouchi) Zhang. Progress in Understanding Color Maintenance in Solid-State Lighting Systems[J]. Engineering, 2015, 1(2): 170 -178 .
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