Rollable OLEDs: introduction and market status

China-based Tianma had an impressive booth at Displayweek 2024, showing numerous OLED and microLED displays and prototypes.

For the automotive market, Tianma showed three new display prototypes. First up is a 13" slidable OLED, with an embedded touch panel, aimed towards car dashboards or center controls.

During Displayweek 2024, Visionox demonstrated many OLED display technologies and panels, and also an interesting microLED prototypes (produced by its subsidiarity Vistar).

Visionox is in the final stages of development of its ViP maskless display production process, and the company showcased some nice ViP smartphone panel prototypes (the technology can be used for any panel size). ViP offers a high improvement in aperture ratio (69% up from 29%) which results in low power consumption and brightness (up to 4X according to Visionox), improved lifetime (up to 6X), improved PPI and more.

TCL CSOT demonstrated its latest displays, technologies and prototypes at Display Week 2024. The company is focused on inkjet printing technologies, and a lot of the displays on show were indeed printed.

So first up, we TCL demonstrated a 14" 2880x1800 400 nits 30-120Hz ink-jet printed LTPO AMOLED display. The display is produced on a glass substrate, with thin film encapsulation (a 'hybrid OLED').

There are some reports that Lenovo is developing a new tablet device that will use Samsung's 17" slidable AMOLED display. The display will be 13" in size when closed, and will be able to roll (slide) up to 17". Lenovo hopes to launch the tablet by 2025.

Back in 2022, Intel demonstrated a laptop device with a 17" rollable AMOLED display, produced by Samsung Display. Since then SDC demonstrated several similar concepts, including a panel that is both foldable and rollable.

BOE had a large demonstration at Displayweek 2024, showing several display technologies and many new panels and prototypes.

First up we have a slidable OLED display, one of the largest we've seen, at 31.6". The display offers a resolution of 5944x1672, a sliding distance of just over 260 mm (BOE says its the world's longest) and a sliding radius of 5 mm.

Samsung Display had a rather large booth at Displayweek 2024, showing its latest OLED displays and technologies. Samsung showed several displays - including foldable smartphone panels, laptop and tablet displays, two QD-OLED displays, its 9.4" round automotive AMOLED, and more.

One interesting display was a panel that combines a foldable and a rollable display, that can open up to an impressively large display. Samsung brands it as a Flex Note Extendable Display.

In early 2019, LG launched the world's first rollable OLED device - a TV that rolls into its base. The 65" Signature OLED TV R had three viewing options - full view, line view and zero view, and was heralded as a radical new TV form factor. The OLED TV R had a high price tag (around $100,000) and obviously never attracted a large customer base.

LG Electronics now decided to stop selling the TV, and not release a new edition. It actually disbanded its small dedicated production line, and will now focus on other high-end premium TVs instead, such as the transparent Signature OLED T TV. 

Last week Samsung Display showed its latest flexible OLED prototypes, with some impressive new displays. We'll start with the OLED Cling Band, a sort of wrist smartwach that wraps around your hand.

Samsung also showed a 17.3" foldable laptop display, a rollable and foldable device (Rollable Flex) that is 12.4" when fully opened, tri-folded displays and more. These are not new displays, but it is clear that Samsung is pushing forward with its flexible display technology to new designs.

Interesting rumors from China suggest that Huawei is planning to release the industry's first smartphone that sports a tri-foldable OLED. When fully open, the device will sport a 10" display, which means it will double as a full tablet and a smartphone. Huawei's plan is to release it in the first half of 2024.

Samsung tri-folding AMOLED prototype

The rumors continue to suggest that Samsung Electronics noticed Huawei's plan, and the Korean smartphone maker may decide to be the first on the market with a novel device, launching its own tri-folding phone - or perhaps even the first rollable phone. 

BOE demonstrated a new rollable AMOLED display at CES 2024, a dual-slidable display, that opens up on both sides.

When closed, the display is 13.6" in size, and when fully opened, it is 16.8". BOE did not disclose any more details.