IK rating & coverlens thickness

In some cases, displays must withstand extreme conditions. This could be in industrial environments, public spaces or transportation. Two essential factors that determine the resilience and longevity of displays are the IK ratings and the thickness of the cover lens. This article explores the significance of these protective measures and explains how they contribute to making displays reliable and durable in demanding environments. It covers both the classification according to IK protection standards and the choice of optimal thickness of cover lenses to ensure a balanced relationship between protection and functionality.

IK ratings

• Definition: The IK protection range is an international standard (IEC 62262).  The standard classifies the degree of protection provided by enclosures against mechanical impacts.
• Spectrum: The protection ratings range from IK00 (no protection) to IK11 (highest protection). A higher IK protection rating means that the display can withstand a greater impact without damage. A display with a high IK protection rating is thus better protected against vandalism, accidental impacts, or other mechanical stresses
• Tests: Standardized tests are conducted in which the impact energy specified in the standard is applied to the test object. Generally, a free-falling object with a specific weight and height is dropped onto the display (drop test). Another method is to test the impact resistance using a pendulum hammer.

EN 62262 IK Code

Coverlens thickness

• Protection: The cover lens protects the actual display from scratches, impacts, and other external influences. 
• Thickness and functionality: The thickness of the glass can vary depending on the application, typically ranging from 0.5 mm to 6 mm.  A thicker cover lens provides better protection against physical impacts and increases the longevity of the display. However, an excessively thick cover lens can impair image quality and reduce the sensitivity of the touchscreen.
• Materials: Various materials can be used for cover lenses, with tempered glass and chemically strengthened glass being the most common.
• Balance: It is important to find a balance between protection and functionality to ensure that the display remains both robust and user-friendly.

Finding the right balance

The combination of a high IK protection rating and optimal cover lens thickness ensures that displays function reliably in demanding environments. Whether in handheld devices, medical products, or parking meters – the right choice of these protective measures is crucial.