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Material Tech

Sticker Lets Smartphones Switch Between 2D and 3D

Dong-A Ilbo | Updated 2026.04.23
POSTECH–Samsung achieve world’s first technology breakthrough
Glasses-free vision made possible with ‘metalens’
2D/3D conversion display structure. Provided by the Ministry of Science and ICT
A next-generation display technology that enables users to freely switch between two-dimensional (2D) and three-dimensional (3D) modes without glasses simply by attaching a device to a smartphone has been developed for the first time in the world by a Korean research team.

The Ministry of Science and ICT announced that a research team led by Professor Noh Jun-seok of the Department of Mechanical Engineering at Pohang University of Science and Technology (POSTECH) and the Visual Technology Team at Samsung Research, Samsung Electronics, have jointly developed a technology that allows easy switching between 2D and 3D with a single lens by using a next-generation optical component called a “metalens.” The study was published in the April 23 issue of the international journal Nature.

With demand for 3D content such as virtual reality (VR) and medical imaging surging in recent years, technologies that allow seamless switching between 2D and 3D on a single device are drawing significant commercial attention.

In response, the researchers used a “metalens” capable of controlling the refraction direction of light according to the applied voltage. When a metalens is used, the screen appears in 2D when no voltage is applied, and in 3D with a viewing angle of up to 100 degrees when voltage is supplied.

Choi Ji-won

AI-translated with ChatGPT. Provided as is; original Korean text prevails.
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