From Extreme Heat to Half a Million Folds: A Rare Look Inside Samsung's Display Lab

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In a secluded room deep within Samsung Display's headquarters in South Korea, rows of whirring gray and black machines repeatedly fold, flex and stress test the company's newest mobile displays. During a mid-June visit, I was among the first people outside the company to step inside the high-security lab and see how Samsung pushes its foldable screens to their limits before they reach consumers.

On Tuesday, Samsung unveiled Flex Titanium, a new display technology for its upcoming Galaxy foldable phones including the Z Fold 8. It combines a titanium-alloy film with a titanium plate to create a thinner, more durable display structure designed to better withstand drops and other impacts -- an important consideration for foldable phones that can cost thousands of dollars.

Samsung Display designs and manufactures screens for Samsung Electronics as well as competitors including Apple, and has become one of the industry's leading developers of flexible and...

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