Tripling the Optical Efficiency of Color-Converted Micro-LED Displays with Funnel-Tube Array

Color-converted micro-LED displays consist of a mono-color micro-LED array and color conversion materials to achieve full color, while relieving the burden of epitaxial growth of three-color micro-LEDs. However, it usually suffers from low efficiency and color crosstalk due to the limited optical de...

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Bibliographic Details
Published in:Crystals (Basel) 2019-01, Vol.9 (1), p.39
Main Authors: Gou, Fangwang, Hsiang, En-Lin, Tan, Guanjun, Lan, Yi-Fen, Tsai, Cheng-Yeh, Wu, Shin-Tson
Format: Article
Language:English
Subjects:
ambient contrast ratio
Arrays
Color
color conversion
color crosstalk
Conversion
Crosstalk
Displays
Efficiency
Epitaxial growth
Glass substrates
Light emitting diodes
Luminous intensity
micro-LEDs
Optical density
Optimization
Quantum dots
Semiconductors
Simulation
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Summary:Color-converted micro-LED displays consist of a mono-color micro-LED array and color conversion materials to achieve full color, while relieving the burden of epitaxial growth of three-color micro-LEDs. However, it usually suffers from low efficiency and color crosstalk due to the limited optical density of color conversion materials. With funnel-tube array, the optical efficiency of the color-converted micro-LED display can be improved by ~3X, while the crosstalk is eliminated. After optimization of the tapper angle, the ambient contrast ratio is also improved due to higher light intensity.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst9010039