At the K-Display Business Forum 2026, LG Display unveiled its roadmap for expanding the application of RGB Tandem OLED technology to mobile devices, along with the development status of next-generation low-voltage 2-stack technology for large-area OLED panels.
Kim Jung-Keun, Research Fellow at LG Display, presented the company’s Tandem OLED application strategy and future device development direction, in addition to reviewing previously introduced OLED performance-enhancement technologies.
LG Display researcher Jung-Keun Kim presents “The Evolution of Tandem Technology: Large-Area.” (Source: UBI Research)
Kim explained that LG Display operates Tandem White OLED and RGB Tandem OLED as distinct technology brands and has accumulated 14 years of mass-production experience in White OLED for large-area TVs and eight years in RGB Tandem OLED. RGB Tandem OLED is currently applied to IT and automotive products, and the company is also pursuing its expansion into mobile devices.
For next-generation large-area OLEDs, LG Display is developing a low-voltage 2-stack technology that could replace the existing 3-stack structure. While a 3-stack structure has traditionally been required to achieve sufficient brightness and color gamut, the company aims to deliver picture quality and viewing-angle performance comparable to those of a 3-stack structure using a new emission architecture and advanced material technologies.
The technology could reduce the driving voltage by approximately 4 V, potentially lowering overall system costs across the panel, module, and power supply system.
LG Display is also evaluating a broad range of next-generation emission technologies to maintain the competitiveness of its large-area OLED business. These include high-efficiency emitting materials, new light-extraction technologies, hyperfluorescence, TADF, and blue phosphorescence.
“LG Display continues to develop technologies that address not only performance improvements but also mass producibility and cost competitiveness,” Kim emphasized. “We plan to expand Tandem OLED beyond TVs, monitors, IT devices, and automotive displays into the mobile device market.”
Changwook Han, Executive Vice President/Analyst at UBI Research (cwhan@ubiresearch.com)
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