Based on reducing module stress， the effects of process， materials and design on black uniformity were studied systematically， and the method was determined that could meet the specification of area-scan 70%. The experimental results showed that by 1） design adopted thinned panel （0.4 mm） and cover glass （1.3 mm）； 2）the materials used polarizers that top and bottom materials were the same， liquid optical clear resin， and low temperature ACF； 3）VAS process reduced the running speed of the lift bar， in this way， the black uniformity on automotive TFT-LCD module area-scan could be increased to 70%.