Flat-Panel Laser Displays Based on Liquid Crystal Microlaser Arrays

Laser displays, benefiting from the characteristic merits of lasers, have led to the revolution of next-generation display technologies owing to their superior color expression. However, the acquisition of pixelated laser arrays as self-emissive panels for flat-panel laser displays remains challenging. Liquid crystal (LC) materials with excellent processability and optoelectronic properties offer considerable potential for the construction of highly ordered multicolor laser arrays. Here, we demonstrate flat-panel laser displays on LC microlaser pixel arrays through a microtemplate-assisted inkjet printing method. Individual organic red-green-blue (RGB) microlaser pixel arrays were obtained by doping dyes into LCs with photonic band edges to obtain single-mode RGB lasing, leading to a much broader color gamut, compared with the standard RGB color space. Then we acquired periodically patterned RGB pixel matrices by positioning LC microlasers precisely into highly ordered arrays, according to the well-organized geometry of the microtemplates. Subsequently, we demonstrated full-color flat-panel laser displays using the LC microlaser pixel matrices as self-emissive panels. These results provide valuable enlightenment for the construction of next-generation flat-panel laser display devices.