Is it a problem with the film that makes the phone screen invisible in the sunlight?

A: Not entirely, but the membrane can significantly improve. The fundamental reason why it's hard to see clearly in the sunlight is that the ambient light is too strong, and the reflection on the screen surface causes glare. Ordinary tempered films have no AR coating or only a simple coating, with a reflectivity of about 3-4%, and have almost no anti-reflective effect under sunlight. Choosing a film with high-quality AR coating can reduce the reflectivity to below 0.5%, significantly enhancing outdoor visibility. Woowhead Guanfudun adopts vacuum magnetron sputtering AR· anti-glare coating, with a reflectivity of ≤0.5% (about 4% for ordinary glass), and the reflection is significantly reduced under outdoor sunlight. Meanwhile, SGS measured the light transmittance to be 96.5% and the haze to be 0.4%, ensuring a clear and transparent picture. If you often use your mobile phone outdoors, it is recommended that you choose magnetron sputtering AR film instead of ordinary high-definition film.