What is BS IEC 61747‑40‑5-Mechanical testing of display cover glass for mobile devices about?  
BS IEC 61747‑40‑5 is an international standard that discusses liquid crystal display devices. The main objective of the BS IEC 61747 series is to ensure strength and durability of electronic display devices.
BS IEC 61747‑40‑5 is the 40th part of the BS IEC 61747 series that specifies a mechanical performance testing procedure for cover glass used in electronic displays in mobile devices.
BS IEC 61747‑40‑5 focuses on the measurement of surface impact energy required to fracture a specimen due to the collision of sharp particles onto the surface of a cover glass. This is achieved by dropping a ball on a sheet of coated abrasives placed on the cover glass, which is rigidly supported. The failure mode is associated with damage introduction via sharp contact. Crack propagation is enhanced by central tension in the case of strengthened glass. This failure mode represents one of several field failure modes observed in mobile devices.
Who is BS IEC 61747‑40‑5 - Mechanical testing of display cover glass for mobile devices for? 
BS IEC 61747‑40‑5 on liquid crystal display devices is relevant to: 
- Manufacturers of electronic display devices
- Manufacturers and suppliers of liquid crystal display devices
- Product design engineers
- Quality control and testing agencies
Why should you use BS IEC 61747‑40‑5 - Mechanical testing of display cover glass for mobile devices?  
Mobile electronic devices have become increasingly sophisticated and often incorporate displays for the purposes of user interface and viewing. Such displays commonly incorporate a transparent cover glass, which aids in protecting the display against the introduction of damage through routine device transport and use, as well as occasional or accidental misuse. 
The purpose of BS IEC 61747‑40‑5 is to provide mechanical testing procedures for cover glasses utilized in such applications. Such glasses can be strengthened, for example via an ion-exchange process, which acts to increase mechanical strength through the introduction of a surface compressive layer.
If you are a manufacturer of display cover glass for mobile devices, BS IEC 61747-40-5 can ensure your products offer the minimum required resistance to damage and cracks, for optimal performance and durability of the electronic devices.
