https://wccftech.com/oppo-unveils-under-display-camera-technology-ahead-of-apples-rumored-smaller-notch-on-iphone-13/

Apple is expected to make the notch smaller with the launch of the iPhone 13 series later this year, While it is a welcome change, it would have been great if the notch was absent altogether. To be exact, the notch has been left untempered since its launch with the iPhone X. The display technology has been advancing for a while now, giving room to companies to embed their sensors underneath the display. OPPO has unveiled its next-generation under-display camera technology today ahead of iPhone 13's imminent launch next month.

As mentioned earlier, OPPO has unveiled its new technology which can be used by manufacturers looking to incorporate it in their respective devices. The company coins that the new under-display camera technology  “maintains the integrity and consistency of the entire screen, both during use and while in standby.”