The perovskite phosphors which have relatively small bandgaps were synthesized and characterized for their application to field emitter displays. Good crystal powders, homogenous, small (∼1 μm), and spherical, were easily formed without flux. Phosphor preparation parameters such as heat‐treatment temperature, time, and activator concentration were optimized for the maximal intensity of photoluminescence. Phosphor cathodoluminescent characteristics were examined by a refractory metal electron gun in a high vacuum chamber. After electrophoretic deposition of phosphors on indium‐tin oxide (ITO) glass, then excitation by field emitter arrays, lumen intensity could be obtained up to 10 cd/m2 with chromaticity of X = 0.625 and Y = 0.297.