3w5w UV laser marking LCD liquid crystal glass panel QR code is clear and durable For 13 years of hard work, the RFH  355nm ultraviolet laser (power range 3W-10W) jointly created by foreign professors can mark the required QR codes on LCD liquid crystal glass panels, improving its quality. The QR code on the exquisite LCD glass panel can provide users with information and data they require and help consumers use the panel to the greatest extent.