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Optical crosstalk reduction of InGaN micro-LED array based on a reflective wall design for display applications
Optics Letters
|January 15, 2026
Summary
Researchers developed a novel micro-light emitting diode (micro-LED) array structure using silver reflective walls to significantly reduce optical crosstalk. This innovation enhances color accuracy and contrast in micro-LED displays.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Optical crosstalk degrades color accuracy and contrast in GaN-based micro-light emitting diodes (micro-LEDs).
- Existing solutions for crosstalk in micro-LED displays are insufficient.
Purpose of the Study:
- To propose and demonstrate a novel micro-LED array structure for effective optical crosstalk reduction.
- To enhance the performance of micro-LED displays for high-quality applications.
Main Methods:
- Fabrication of a micro-LED array with individual pixels surrounded by silver (Ag) reflective walls.
- Luminous intensity distribution mapping to quantify light spot reduction.
- Finite-difference time-domain (FDTD) simulation to analyze optical field distribution.
Main Results:
- The proposed micro-LED structure demonstrated significant light spot reduction compared to conventional devices.
- A 16x16 array achieved low crosstalk under a 0.5 mA injection current.
- FDTD simulations showed that a 5 µm reflective wall effectively confines light emission within a ±45° divergence angle.
Conclusions:
- The developed micro-LED array structure with reflective walls offers a promising solution to mitigate optical crosstalk.
- This approach can significantly improve color accuracy and contrast in micro-LED displays.
- The findings contribute to advancing micro-LED technology for superior display applications.
