At present, the electronic price tags and electronic shelf labels on the market have a variety of screen sizes such as 1.54 inches, 2.13 inches, 2.9 inches, 4.2 inches, 5.8 inches, and 7.5 inches. The commonly used electronic price tags in the period are 1.54 inches, 2.13 inches, 2.9 inches, and 4.2 inches , These four sizes of electronic price tags have been able to meet the price display needs of various products.