In POS terminal devices, the display serves as the core interactive interface, primarily enabling transaction information visualization (amount, payment methods, discount details), operational process guidance (signature confirmation, receipt printing options). Commercial-grade touchscreens feature high sensitivity. Some premium models incorporate dual-screen displays (main screen for cashiers, secondary screen for customer verification). Future developments will focus on integrated biometric payments (facial/fingerprint verification), and low-power e-ink screen applications, while enhancing financial-grade security protections.