Abstract
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.
Highlights
Micro-LED with a chip size less than 100 μm is a potentially disruptive display technology because of its outstanding features such as low power consumption, good sunlight readability, true black state, high dynamic range and wide color gamut [1,2,3]
We propose a funnel-tube array for color-converted micro-LED displays in order to reduce color crosstalk and improve light conversion efficiency simultaneously
Color Crosstalk micro-LED chip emits light while and others remain off, light leakage may come from the surrounding pixelsFigure due to1.the light scattering phosphor film, is referred display as color(a)
Summary
Micro-LED with a chip size less than 100 μm is a potentially disruptive display technology because of its outstanding features such as low power consumption, good sunlight readability, true black state, high dynamic range and wide color gamut [1,2,3]. It is still challenging for the mass transfer of micro-LEDs from semiconductor wafer to glass substrate with high yield [4,5]. The fabrication process is complicated, because the substrates for growing blue/green micro-LEDs and red micro-LED are different
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