Chinese company Xiaomi was one of the first to provide a proof of concept for an under-display selfie camera that doesn't need a notch or a punch-hole in order to work. But, the technology wasn't there yet, and early this year the company announced a few hurdles it needs to overcome first, before under-screen cameras can make it to consumer smartphones.

Notably, the dense pixels modern displays have, which are to be in front of the under-display camera, were blocking too much light, said Lu Weibing, VP of Xiaomi. Ultimately, he wrote on Chinese microblogging site Weibo that the entire ...