High-quality OLED displays enable screens to emit distinct sounds from individual pixels

A analysis group has developed the world’s first Pixel-Based mostly Native Sound OLED expertise. This breakthrough allows every pixel of an OLED show to concurrently emit totally different sounds, basically permitting the show to operate as a multichannel speaker array. The group efficiently demonstrated the expertise on a 13-inch OLED panel, equal to these utilized in laptops and tablets.

The analysis has been published within the journal Superior Science. The group was led by Professor Su Seok Choi of the Division of Electrical Engineering at POSTECH (Pohang College of Science and Know-how) and Ph.D. candidate Inpyo Hong of the Graduate Program in Semiconductor Supplies and Units.

Visuals meet audio: Towards a multisensory show period

Whereas show applied sciences have advanced with vital advances in decision, excessive dynamic vary, and coloration accuracy—significantly with OLEDs and QD-enhanced shows—the business now faces the necessity for breakthroughs that improve not solely picture high quality but in addition the realism and immersion of person expertise.

As visible applied sciences strategy maturity, integrating multisensory inputs—akin to seeing, listening to, and contact—into shows has grow to be a brand new frontier. Subsequently, now shows are not passive panels that merely present photographs; they’re evolving into immersive interfaces that interact a number of human senses. Amongst these, sound performs a important function: analysis signifies that audiovisual synchronization accounts for practically 90% of perceived immersion.

Nonetheless, most present shows nonetheless require exterior soundbars or multi-channel audio system, which add bulk and create design challenges—particularly in compact environments like car interiors, the place integrating a number of audio system is troublesome.

OLEDs with built-in pixel-based sound

To handle this, researchers have targeted on integrating superior sound capabilities immediately into OLED panels, identified for his or her slim, versatile kind components. Whereas corporations have explored attaching exciters to the again of TVs or bending OLEDs round audio system—as seen at MWC 2024 by Samsung and OLED panel speaker by LG—these strategies nonetheless depend on cumbersome {hardware} and face challenges in correct sound localization.

The core problem is that conventional exciters—units that vibrate to provide sound—are massive and heavy, making it troublesome to deploy a number of items with out interference or compromising the OLED’s skinny design. Moreover, sound crosstalk between a number of audio system results in a scarcity of exact management over localized audio.

Crosstalk-free pixel-based native sound management built-in with actual working OLED

The POSTECH group overcame these challenges by embedding ultra-thin piezoelectric exciters inside the OLED show body. These piezo exciters, organized equally to pixels, convert electrical indicators into sound vibrations with out occupying exterior area. Crucially, they’re absolutely appropriate with the skinny kind issue of OLED panels.

Because of this, every pixel can act as an impartial sound supply, enabling Pixel-Based mostly Native Sound expertise. The researchers additionally developed a way to fully get rid of sound crosstalk, guaranteeing that a number of sounds from totally different areas of the show don’t intervene with one another—one thing beforehand unattainable in multichannel setups.

Actual purposes: Cell, pill, laptop computer, TV, automotive, VR, and past

This innovation permits for actually localized sound experiences. For example, in a automobile, the motive force might hear navigation directions whereas the passenger listens to music—all from the identical display. In digital actuality or smartphones, spatial sound can dynamically adapt to the person’s head or hand actions, enhancing realism and immersion.

Most notably, the expertise was efficiently carried out on a 13-inch OLED panel, proving its sensible scalability and business viability. The show delivers high-quality audio immediately from the display, with out the necessity for exterior audio system, all whereas preserving the slim and light-weight advantages of OLED.

“Shows are evolving past visible output units into complete interfaces that interact each sight and sound,” mentioned Professor Choi.

“This expertise has the potential to grow to be a core characteristic of next-generation units, enabling modern, light-weight designs in smartphones, laptops, and automotive shows—whereas delivering immersive, high-fidelity audio.”