Much more attention has been made for the research of micro lens array(MLA) design and manufacturing for applying micro- and mini-LEDs to automotive, biomedical, TV and wearable displays, augmented(AR) and mixed reality(MR), flexible panel lightings, and optical communication. For the development of manufacturing technology for MLA of AR/MR displays with higher resolution and luminance, the repeated optimization of aspheric lens arrays, the development of Ni master mold using electro-chemical methods and unique lens forming device have been carried out to achieve more than 847 ppi resolution on 0.47” display device. This technique has been significantly improved several times to account for the high precision bonding with the quantum dot film for color changing and the second bonding with the front plane. The technology for the evaluation of optical performance of MLA in/outside of device and the alignment technique for each bonding layer have been developed in several proto-types.

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