A side-emitting micro-optical guidepipe is presented to replace the linear light source cold cathode fluorescent lighting (CCFL) in backlight module . The guidepipe retains the advantages of designing the light guide plate but avoid the shortcomings of CCFL. Combined with RGB LED, the new backlight module can realize time mixing color and remove color filter. The tricolor micro-optical guidepipe is modeled in optical software, and the netted dots radius function is proposed by theoretical derivation to uniform light energy, then the analysis show that the structure improves color range to 150%, the efficiency is above 66% the uniformity is better than 95%, and the light transmittance of this new backlight is 12% which is twice of that of the CCFL backlight module.