Follow LG Display’s journey of OLED innovation,
where future technology became today’s reality.
LG Display’s journey of OLED innovation has been defined by continuous breakthroughs that push beyond structural limitations. This chapter explores Tandem OLED, a technology that elevates brightness, lifespan, and power efficiency to a new level.
Tandem OLED with improved brightness and durability through structural innovation
Tandem OLED is a technology that vertically stacks multiple emission layers, dispersing the energy applied to the OLED device and delivering superior durability—including higher brightness and longer lifespan—compared to conventional single-layer structures.
As early as 2013, LG Display successfully mass-produced the world’s first large-sized OLED TV panels, establishing the foundation for the concept of stacked emission layers. Instead of arranging red, green, and blue diodes horizontally on a TFT(Thin-Film Transistor) backplane, the large-sized WOLED employs a vertically stacked emission layer structure. In this structure, self-emissive pixels generate white light, which then passes through color filters to produce individual colors. This structure enabled stable mass production of large-sized OLED TV panels and fundamentally reshaped the OLED market.
The Tandem structure, which enhances performance by vertically stacking light-emitting layers, has seen technological development in small-to medium-sized OLEDs, including automotive displays, tablets, and laptops. By optimizing the Tandem structure for diverse use environments, LG Display has continued to expand the scope of OLED innovation and elevate performance across a wide range of applications.
Optimizing Tandem OLED Across Diverse Applications
Developing Tandem OLED required overcoming numerous technical challenges, as each application—automotive displays, IT devices, and tablets—demands different levels of brightness, durability, thickness, and operational time. LG Display optimized the Tandem structure for each environment through tailored device design and process development.
Tandem OLED technology disperses the energy applied to OLED devices, enabling more stable and long-lasting operation. As a result, it has gained increasing attention for use in automotive displays as well as displays for IT devices. In automotive applications, where extreme temperatures and strong sunlight demand exceptional stability, Tandem structures demonstrated significantly enhanced brightness and durability.
In the IT display sector, which typically involves extended screen usage, Tandem OLED enables significantly improved lifetime and brightness compared to conventional OLED panels, while also reducing power consumption. This makes it an ideal solution not only for standard laptops but also for high-performance IT devices, including AI-powered laptops.
A Timeline of Tandem OLED Innovation
Over the past several years, Tandem OLED has continuously evolved while expanding rapidly across product categories. The journey began in 2019 with the world’s first commercialized Tandem-based automotive OLED. In 2023, LG Display mass-produced the world’s first 17-inch foldable laptop panel using a Tandem structure. This was followed in 2024 by the first application of Tandem OLED to mainstream laptop displays.
In 2025, LG Display unveiled its fourth-generation OLED featuring a Primary RGB Tandem structure, in which the light source is composed of four stacked layers (4-Stack), including two blue emission layers along with independently controlled red and green emission layers. This advancement further elevated the technological maturity of Tandem OLED.
Meanwhile, marking the 13th year since the launch of its OLED business, LG Display introduced a new brand identity that redefines the essence and value of its OLED technology, positioning “Tandem”—the company’s core OLED technology—as the centerpiece of its OLED branding.
Built on Tandem technology, which enhances durability and performance through a stacked OLED device structure delivering longer lifespan, higher brightness, and lower power consumption, LG Display has clearly differentiated its large-sized and small- to medium-sized OLED technologies to communicate their respective strengths more intuitively. The brand name Tandem WOLED has been designated for large-sized OLED technologies used in TVs and monitors, while Tandem OLED represents small- and medium-sized RGB OLED technologies for applications such as automotive displays, tablets, and laptops.
Through this renewed brand architecture, LG Display aims to more clearly convey the differentiated customer value and unique competitiveness of its OLED technologies, while strengthening brand trust in the global market.
