Galaxy Z Fold2 5’s Fold Radius is Smallest Ever at 1.4mm
Samsung Display claims to be the first to commercialize a foldable display panel having a 1.4R rating for its curvature, representing the smallest degree of curving among commercialized foldable smartphones to date ― an advancement first applied to the recently-released Galaxy Z Fold2 5G. Using Ultra-Thin Glass (UTG) adds a sleek and refined look, When the comprised of multiple layers is folded, the front side faces contraction stress, while the backside encounters extension stress concurrently. Those repelling forces called “folding stress” negatively impact the overall structure of the panel. Folding stress is closely tied to the curvature rate of the display panel on the smartphone. The lower the curvature rate the greater the force on the panel, raising the folding stress. A “infolding” design produces a higher level of stress forcing designers to choose “outfolding” approach. To minimize folding stress, Samsung Display optimized the choice of material, the panel design and the module assembly, so that the multi-layered structure functions as a cushion when the panel is folded.
Samsung Display’s new 1.4R (1.4mm radius) foldable OLED offers a more advanced convenience-oriented display. “With a rapid increase in application usage, fueled by much higher levels of content amidst rising 5G commercialization, demand is already growing for the advanced form factor,” according to Samsung Display. “The world’s first 1.4R foldable OLED, is expected to provide greater value as it delivers near-perfect folding and outstanding image quality,” a company official added. Adding to the display’s customer satisfaction, Samsung Display commissioned Bureau Veritas**, a global test, inspection and certification company, to verify 200,000 foldings of its 1.4R foldable OLED display. Despite SDC’s claims, Royole new Flex Pai 2 was recently tested to 1.8m folds, indicating a more sophisticated design.
Samsung Display received “Eye Care Display” certification from SGS***, a world-renowned certification agency for reducing blue-light emission. The new display has achieved an improved emission level for blue light of only 6.5%, which is the