The panel features LG Display's latest OLED.EX technology in combination with 'Cinematic Sound OLED' that uses the actual OLED panel as a speaker system.
LG Display produces the OLED panels inside LG Electronics, Sony, Panasonic, Philips, Vizio and other brands' OLED TVs so there is a good chance that this panel will make it into a TV from one of the popular brands in the near future.
LG Electronics will launch the first 97-inch 4K OLED TV later this year but it will not be equipped with the in-panel speaker system. At this time, only Sony OLED TVs use this unique technology and Sony refers to it as 'Acoustic Surface Audio'.
- "The newly-unveiled 97-inch OLED.EX display boasts the company’s special ‘Film CSO (Cinematic Sound OLED)’ technology, which allows the display to vibrate and generate the sound directly from the display without separate speakers. A 5.1 channel sound system is embedded into the widescreen, creating a performance that offers a cinematic level of immersion," LG Display explained.
Behind the panel there are actuators that use different parts of the OLED panel as a sort of speaker membranes for the 5 channels, aided by a separate bass speaker. It is not clear from LG Display's description how the panel's speaker system can virtualize rear channels.

97-inch OLED.EX with 5.1-channel Cinematic Sound OLED embedded. Photo: LG Display
First 42-inch OLED.EX
The new 97-inch panel is being exhibited for the first time this week in South Korea at the K-Display 2022 exhibited along with the first 42-inch OLED.EX panel.
This 42-inch panel will start appearing in LG C2 models in the second half of 2022.
Also read: Philips unveils 2022 OLED TVs with brighter 'OLED EX' panel
OLED.EX is LG Display's new deuterium-based OLED panel that the company claims is "up to 30 percent brighter compared to conventional OLED displays".