The pictures of shop signs, doorways and facades can be drawn by hand, made by computer or printed on paper. The materials of billboards are generally welded with square tubes, angle steel, etc. It can have three-dimensional plate, lamp cloth, blister, car paint, gusset plate, aluminum-plastic plate, etc

The interior light billboard is commonly known as the outdoor light box. The materials of the spray painting are different, and the built-in light tube, so that the picture of the billboard during the day and night is very clear. Good light transmittance, uniform, relatively high brightness.