Who understand the internal structure and principle is also hope to advise
The basic principle is as follows: advertisement pattern piece, advertisement projection lamp, negative reflection, LED light source reflection.
Advertising projection lamp, namely new advertising products of a high efficiency, are to appear in the advertisement in the field, the replacement of the advertising pattern only needs to change the pattern, the pattern is reflected to the wall, the ground through the principle similar to the projection reflex advertising.
Advertising projection lamp, namely new advertising products of a high efficiency, are to appear in the advertisement in the field, the replacement of the advertising pattern only needs to change the pattern, the pattern is reflected to the wall, the ground through the principle similar to the projection reflex advertising. The basic principle is as follows: advertisement pattern piece, advertisement projection lamp, negative reflection, LED light source reflection.
