A similar technology has been used on Sony OLED TVs in recent years, albeit with very different control and volume considering a TV is not resting against your ear. However, LG's Crystal Sound OLED system will be one of the first to make it to a full, consumer released smartphone.
It essentially repurposes the OLED display on the LG G8 ThinQ as a diaphragm. It vibrates the entire screen to produce impressive volume when in speakerphone mode or playing music aloud.
The phone can also combine the Crystal Sound OLED tech with the bottom speaker unit to create stereo output.
The whole technology is different to the one touted for the Vivo Apex and Meizu Zero concept handsets. They each isolate different parts of the display, thereby using smaller vibrations to supply the earpiece at the top of the phone, without actually having an earpiece hole in either device.
LG has also revealed other aspects of the LG G8 ThinQ's audio capabilities.
It will sport DTS:X 3D surround sound to virtually provide a 7.1 experience - with or without earphones, it claims.
The phone will also have a Hi-Fi Quad DAC to upsample audio files to their best quality, plus support for MQA for higher quality audio streaming.
Finally, the company's proprietary Boombox Speaker tech will be on board, which uses the interior space of the phone as a resonance chamber for greater bass and volume.