LG Rollable Teardown Reveals Innovative Engineering and High Production Costs

A recent teardown of LG's unreleased Rollable smartphone has revealed the extraordinary engineering behind its expanding display, while underscoring the practical challenges that prevented it from ever reaching consumers. The device, teased by LG in 2020 and nearly ready for launch in 2021, uses dual motors, gear mechanisms, and spring-loaded arms to smoothly roll out a flexible 7.5-inch screen from a compact body, as detailed in a hands-on video by YouTuber JerryRigEverything.^[1][2][4] According to Ars Technica, this complexity would have made the phone extremely expensive to manufacture and prone to durability issues, explaining why rollable displays never became a mainstream product category.^[2]

LG showcased the Rollable as part of its innovative push before abruptly shutting down its smartphone division in 2021 after years of financial losses. The company shifted focus to more profitable sectors like home appliances and electric vehicle components, canceling advanced projects including this one, as reported by Slashdot and Republic World.^[1][2] One prototype surfaced online as early as 2022, but the fresh teardown has reignited interest, offering the most detailed glimpse yet into its internals—strong motors capable of pushing heavy objects, dust-defying bristles along the rear glass, and zipper-like supports that guide the screen as it rolls and unrolls without exposing it directly.^[1][2][4]

The teardown highlights impressive features that still feel cutting-edge today. The flexible display hides behind a protective glass panel when retracted, remaining functional even in that state, much like LG's transparent TVs demonstrated at CES. Supportive slats on the screen's back provide stability, akin to an escalator, while safeguards prevent damage if users resist the motorized expansion.^[1][2][4][5] Phandroid notes that the internals "put most phones you can buy today to shame," positioning the Rollable as a device way ahead of its time despite never launching.^[3]

This revelation matters amid the ongoing foldable phone boom from rivals like Samsung, which has yet to crack rollables even five years later. 9to5Google points out that LG's concept appeared ready for sale, with robust engineering like geared tracks and spring arms ensuring smooth operation—yet high costs, fragility from numerous moving parts, and manufacturing hurdles kept it shelved.^[1][2] Consumers missed out on a truly unique form factor that could have expanded the smartphone market beyond folding screens.

Looking ahead, the teardown serves as a cautionary tale for the industry. While foldables have gained traction, rollables' demands for precision motors, flexible materials, and dust protection raise questions about scalability and pricing. No major manufacturer has revived the concept at scale, though ongoing experiments with flexible displays suggest LG's vision could inspire future breakthroughs.^[1][2][3] For now, it stands as a brilliant but unrealized piece of mobile innovation.