Oppo patents a phone with an under-display camera, rear display
The company has just received a patent from the WIPO World Intellectual Property Organization for a device with a UD camera and a small screen on the back, next to the original cam setup - whether it's part of the Find X4 series or not, we have yet to learn.
The patent has been approved by CNIPA (Chinese National Intellectual Property Association), but just now it is approved for global use. Acquired by LetsGoDigital, it also reveals the screen is curved from all four sides, and the rear camera island is square with four shooters inside, although the amount of cameras is not part of the patent, it is just an illustration.
The second display will probably help with selfies and display notifications. Having a screen next to the camera is related to the Meizu 7 Pro series and was recently adopted by the Mi 11 Ultra, which allows them to take selfies with the original camera.