Pixel-to-pixel fiber-coupled emissive micro-light-emitting diode arrays

– L Zhu, CW Ng, N Wong, KKY Wong, PT Lai, and HW Choi

A 3-D schematic diagram showing the fiber-coupling system. Bottom-right inset shows a close-up image of the packaged micro-LED array under operation. Top-left inset shows an optical microscope image from the exit end of the fiber, display the letters “HKU” under operation.

IEEE Photonics Journal, vol. 1, 1, pp. 1-8 (2009)

We report on an integrated fiber-coupled bi-linear micro-light-emitting diode array, serving as a portable microdisplay system. The fiber bundle transforms the bi-linearly arranged optical signals from the emissive array into a 6-by-8 pixel microdisplay, offering a crisp and clear optical output. The pixel-to-pixel coupling arrangement ensures optical coupling efficiency. Due to the narrow acceptance cones of optical fibers, individual pixels can be well resolved with minimal crosstalk. The performance and functionality of this optical system is fully evaluated. A model to determine the fiber-coupling efficiency was constructed; it was found that the simulated results compare well with the measured data.

DOI: 10.1109/JPHOT.2009.2020963