To achieve full-color micro-LED displays using color conversion methods, the effects of three-color cross talk and blue-light cross talk on the color conversion layer were investigated. A light simulation was used to analyze the three-color cross talk caused by different pixel banks, comparing pixel banks made from ordinary photoresist and black photoresist. Various factors contributing to blue-light cross talk were also examined. The influence of the divergence angle of blue light and the structure of the color conversion layer for blue-light cross talk was analyzed through light simulations. Furthermore, potential solutions to mitigate blue-light cross talk were explored.