DL1301 is a 13.3” LCD 405nm backlight module developed for 3D LCD printing with well collimated 405nm UV LEDs array. The designed collimation angle (HWHM) of DL1301 is ±8 degrees, and the minimal irradiance after Mono-LCD is over 1.7mw/cm2. With good irradiance uniformity, DL1301 can well meet the needs of large size 3D printing for industrial applications.