Special Features and Optical Treatments

Outdoor and some interior applications mean that the display can be exposed to direct sunlight. Whereas Zytronic touch sensors are completely unaffected by ultraviolet (UV) radiation, it can cause damage to the underlying display, especially LCD’s – which are ‘aged’ rapidly by unchecked exposure to UV light, and can cause yellowing of the screen. When specified in a touch sensor design, the additional filter we laminate into the rear of the touchscreen will block UV wavelengths of less than 300nm, including UVB and UVC.

When a touch sensor is installed in a location exposed to strong sunlight or overhead lighting, if made from untreated glass, the reflection from the surface of the touchscreen may render the displayed image unreadable due to the harsh reflection. Specifying our hard-coated, anti-reflective (AR) glass allows this light reflection to be reduced by around 75% making it a good solution for sunlight readability. Furthermore, to enhance display transmission and brightness further, upon request, we can laminate an additional AR filter to the rear of the touch sensor, to provide near 99% of the light to be transmitted from the underlying display to the touchscreen user.