Point light source is idealized as particle light source. Point light source is an abstracted physical concept, in order to simplify the study of physical problems. Like the usual smooth plane, particle, no air resistance, point light source does not exis

The principle of outdoor waterproofing and transparency is a micro-innovation of the lamp screen. The fabrication technology of patch, the encapsulation of lamp beads and the control system have been improved. With the hollow-out design structure, the obs

Interactive display of indoor transparent screen is a new display method based on transparent screen, which cooperates with touch and software video.