Crystals (Jan 2019)

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

  • Fangwang Gou,
  • En-Lin Hsiang,
  • Guanjun Tan,
  • Yi-Fen Lan,
  • Cheng-Yeh Tsai,
  • Shin-Tson Wu

DOI
https://doi.org/10.3390/cryst9010039
Journal volume & issue
Vol. 9, no. 1
p. 39

Abstract

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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.

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