Optical crosstalk suppression in micro-pitch mini-LED arrays via silicon grid integration
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Published on: July 18, 2015
Zhanyuan Chen1,2, Yongwei Tang1, Pei Jiang3
1School of Optical and Electronic Information, Huazhong University of Science and Technology, Hubei 430074, China.
Abstract:
Optical crosstalk between adjacent pixels limits the performance of micro-pitch mini-light-emitting-diodes (mini-LEDs). High-reflectivity silicon grids were fabricated by deep etching and sidewall metallization and integrated into mini-LED arrays. The grids suppressed interpixel crosstalk and improved light extraction. Simulations and experiments showed that grids increased central illuminance to 132% of the no-grid value and reduced crosstalk ratio from 18.4% to 9.6%. Increasing grid height further improved performance, while sidewall roughness had minimal effect. These results establish silicon grids as a solution for crosstalk suppression and light enhancement in micro-pitch mini-LED arrays, with guidelines for next-generation displays and lighting.
