In public spaces, touchscreens are frequently used and are inevitably subject to accidental scratches from sharp objects such as keys and coins. Touchscreens with excellent scratch-resistant properties have become a focal point of attention for both manufacturers and users.
1. The Importance of Scratch-Resistant Touchscreens in Public Settings
(1) Durability and Long Lifespan
Public devices (such as self-service terminals, ticket machines, and information kiosks) are used frequently and are prone to scratches from keys, coins, and other hard objects. Scratch-resistant screens significantly reduce surface damage, extend device lifespan, and lower maintenance costs.
(2) Visual Clarity
Scratches scatter light, affecting display quality. High-hardness screens maintain light transmission, ensuring information readability, especially in outdoor environments with strong sunlight.
(3) Image and Reliability
A pristine screen reflects the professionalism of public services, while a damaged screen may lead users to question the functionality of the equipment.
2. Performance Requirements Analysis for High-Hardness Touchscreens
(1) Resistance to Mechanical Damage
Mohs Hardness Scale: Screens must achieve a hardness level of 6 or above (e.g., 6-7 for tempered glass) to withstand scratches from common hard objects (e.g., sand with a hardness of 7).
Surface Treatment Technology: Chemical strengthening (ion exchange) or nano-coating (e.g., diamond-like carbon coating) is used to enhance hardness.
(2) Environmental Adaptability
Outdoor devices must withstand impacts from wind, sand, hail, etc. High-hardness materials (e.g., sapphire glass) can withstand higher impact energy (e.g., 9H pencil hardness test).
Under temperature changes, high-hardness materials have more stable thermal expansion coefficients, reducing deformation-induced touchscreen malfunctions.