By spraying the high refraction glue doped TiO_2particles on the side of t he inverted chip and spraying the phosphor powder coating on the surface of the chip,the white light digital tube was prepared,and the samples were tested and analyzed.The results o f analysis indicate that,as the concentration of TiO_2particles increases,the flux of the device f irst increases and then decreases after the first rise.The maximum flux of 161.2 lm is reached at concentraiton of TiO_2particl es of 0.34%,which is 3.85% higher than that of 155.0lm with the doping concentr ation of 0%.When the doping concentration is 0.4%,the col or temperature is decreased by 33.4%.It is also discovered by experiment that th e light flux and color temperature of the five faces lighting white light digital tubes are increased by 7.80% and 16.73% compared with those of sin gle surface lighting device,respectively.By comparing the intensi ty of the chip,a single surface lighting chip has a visual angle of 114.6°.The results show that by the properly adjusting the doped concentration of particles ,a white light digital tube with small visual angle,adjustable relevant color temperature and suitable light flux can be proposed.