FAQ - Frequently Asked Questions
Screen protectors are available in different forms and qualities - as display foils, as flexible glass or as glass foils (hard glass or bulletproof glass). In order to answer the most important questions about screen protectors in a condensed form, we have summarized them as FAQ - Frequently Asked Questions. If you have any further questions, you easily can contact us.
Display protection guideFrequently asked questions and their answers
Effective antireflection coating of displays
Problem description reflections on display
Reflections on the display are quite annoying and distracting. Besides the reduction of the image contrast, important elements and information on the display are partly completely obscured. A further negative effect is the reduction of the visually recognizable color dynamics due to the bright environment or with peak lights, which create a strong reflection on the device display. Another problem is the different focus of the human eye on reflections. These are mostly due to point light sources a few meters away, such as lamps, or windows through which daylight penetrates. Our human vision is very irritated by this: Should the eye now focus on the mostly very bright reflection or on the screen content? A comparison of the brightness of a display, e.g. a good cell phone display of an iPhone or Samsung smartphone with 600 -1000 lux with a modern office ceiling LED lamp with 30 watts at 2500 lumens, a beam angle of 35° and a distance to the viewer or cell phone display of 2.5 meters, gives the following result: The ceiling LED still has about 1300 lux at this distance under the above assumptions. Accordingly, the point light source is 1.3x to 2x as bright as the light source in the display, depending on the situation and the screen brightness setting of the smartphone. We will spare a comparison to the sun at this point: Everyone knows the enormous luminosity of our fixed star, which makes it almost impossible to read information on a reflective display outdoors.
Antireflection coating by means of λ/4-layer films
With the help of a factory-applied anti-reflective layer or subsequently applied λ/4-layer film, some manufacturers reduce the reflection on the reflective display. These anti-reflective coatings are very often called λ/4-layer because the anti-glare effect is based on the destructive interference effect. Unfortunately, this type of anti-reflective coating also makes itself unpleasantly noticeable with a purple-blue color cast, since the relatively short-wave green range around 550 nm is filtered out and the addition of the remaining color components cause this blue cast. A disadvantage of this λ/4 layer is also the limited effect with point sources and their point reflection.
Anti-glare due to matte antireflection coating
With older displays, such as older Apple iMacs, you could reduce the reflection very well with a matte screen protector. Unfortunately, you also lost the sharpness of the screen content because the distance between the screen glass and the actual LCD display was relatively large. Fortunately, the distance between the cover glass or display and the actual LCD, LED, min LED or OLED screen is very small in most display models (or no longer exists at all due to new technologies), so that a very effective anti-reflection coating can be achieved by means of matt scattering of the reflection. In the following example, we have equipped a Samsung UE55D8000 LCD TV from 2011 with a Neoxum anti-reflective film on the right half of the screen. You can see very clearly that objects in the living room cause sharply outlined reflections due to daylight penetrating through window panes.
Objects, like the green glass jar, are sharply outlined and reflected on the screen. The surroundings of the living room can also be perceived very well as a reflection. The border between the left reflective half of the display and the right half of the screen with the applied anti-reflective Neoxum display film runs exactly from top to bottom through the actress' nose. Comparing the two eyes of the woman, it quickly becomes clear that the left eye is almost completely covered by a reflection of a mural. The contrast is greatly reduced. The left eye can only be guessed at. Watching TV in daylight with many reflections on the TV screen is almost impossible. Only after applying the special anti-glare film the screen reflections are effectively scattered: the right eye of the actress is clearly visible in the picture and stands out prominently. Punctual reflections are strongly diffused by the special matt display film, so that incident light at the air-glass interface of the TV screen is no longer reflected according to the law of entry angle = exit angle, but is extremely strongly diffused. As a result, surfaces as well as point light sources are no longer perceived as disturbingly reflective. Television is also possible in daylight. With the help of such anti-reflective screen protection films, reflections can be reduced by up to 85 percent..
Antireflection foil from Neoxum
The AGS (Anti-Glare Protective Film) anti-glare display film provides anti-reflective protection and protects sensitive displays at the same time. Due to a special surface treatment, annoying reflections on the display are very well reduced, so that even outdoors the display becomes legible again. The following video illustrates the anti-glare effect of the Neoxum display film with a very strong point light source, an LED lamp.
The anti-reflective film diffuses incident artificial light or daylight (even direct sunlight!) on the surface, so that the display can be read. The anti-reflective display film does not distort the display colors! An important point for graphic artists, photo artists or users in the field of cartography.
OnScreen hybrid glass anti-reflective
As a highlight, we can also offer our high-tech material hybrid glass in an anti-reflective variant. Thus, we achieve a further increased robustness of the applied display protection with the help of the novel hybrid glass, which combines the advantages of a high-performance film with the advantages of glass: very flexible and yet a glass-hard surface.
Our technical data sheets, test reports and certificates can be found in our download area. Most of the documents are also available in English.