TCL CSoT is deploying new OLED technologies at its production lines, including LTPO, micro lens and polarizer-free OLEDs

TCL (CSoT) announced that the company has finalized the development of several new OLED technologies, which has been deployed at the company's production lines.

TCL/CSoT 8'' PLP-LTPO foldable AMOLED prototypes (SID Displayweek 2022)

The first technology is LTPO, or Low-Temperature Polycrystalline Oxide, an OLED backplane technology developed originally by Apple. LTPO enables variable refresh rates, and TCL's technology can support a wide range of frequencies, from 1Hz to 144Hz.

Samsung Display announces the polarizer-free ECo2OLED tech

Samsung Display announced its latest OLED panel, the Eco²OLED, which increase light output by 33% compared to SDC's previous OLED panels. The increase light translates into a power consumption reduction of up to 25%.

Samsung Display Eco2 OLED vs. regular OLED

For the Eco²OLED panel, Samsung finally managed to commercialize a polarizer-free OLED, after many years of R&D. The first phone to adopt this display will be Samsung's upcoming Galaxy Fold 3. Interestingly Samsung says that the new design also enabled it to incorporate a high-quality under-the-display camera as more light is entered through the OLED.

BOE shows new OLED technologies at SID Displayweek 2021

BOE demonstrates several new OLED technologies at SID Displayweek 2021. First up is a new rollable display. The new display is 8-inch in size, and it features a resolution of 2592x2176 and a bending radius of 4 mm. BOE says the new display passed over 200,000 sliding cycles.

Last year at Displayweek 2020, BOE demonstrated a 12-inch rollable OLED. It has since been working with LG Electronics on the company's rollable smartphone (which was since canceled as LG withdrew from the smartphone market) and with OPPO on a 7.4-inch sliding OLED phone.

Here is Tianma's CFOT rollable AMOLED display

In March 2021 Tianma unveiled a new OLED display technology, which it refers to as CFOT OLED - a polarizer-free OLED that adopts color-filters instead to remove reflections. The company demonstrated a 8.03" CFOT OLED prototype at SID Displayweek 2021:

Tianma says that a CFOT OLED enables a thinner design, improves the light emittance and also cuts the power consumption by 20%. The 8.03" display offers a resolution of 2000x2544 (403 PPI).

Here come Samsung polarizer-free POL-LESS OLEDs

Samsung Display has been developing polarizer-free AMOLED displays for many years, and last year UBI detailed how the company plans to use color filters to eliminate the need for polarizers and so increase the efficiency of their OLED panels while also lowering the thickness.

Samsung Display POL-LESS AMOLED structure image

DSCC posted an interested article that details Samsung's upcoming polarizer-free OLEDs, which it brands as POL-LESS OLEDs. The first OLEDs to adopt this new structure are expected to be adopted in Samsung's Galaxy Fold 3 later this year.

Researchers develop highly efficient polarized light emitting polymer OLED devices

Researchers from the Imperial College London have devised a method to create strong chiral light emitting polymers OLEDs. These OLED devices emit efficient polarized light - which means that they could be used to create OLEDs without an anti-reflection polarizer filter and thus enable higher efficiency displays.

The researchers discovered that using thin films of aligned polymer LED devices shaped like fusili pasta it is possible to emit high chirality light.

UBI: OLED makers are developing color filters as replacement for polarizers in foldable OLEDs

UBI Research reports that OLED makers are aiming to adopt color filters instead of polarizers in foldable OLED displays. The polarizer help prevent internal reflections by external light, but they lower the brightness and limit the flexibility of the panel.

BOE / UBI: color-filter for foldable OLED scheme

Using color filters instead of the polarizer may enable brighter panels and also thinner ones which are more flexible. BOE has already demonstrated such a panel back in 2017 (scheme shown above) - and they said it is 23% brighter than a polarizer OLED, and it is also 110 um thinner. Samsung Display is also developing similar technology.

LG Chem sells its LCD polarizer business, to focus on its OLED polarizers

LG Chem announced that it has sold most of its LCD polarizer business to China’s Ningbo Shanshan, in a $1.1 billion deal. LG Chem will retain its automotive LCD polarizer business, and aims to focus on "strengthening its competitiveness in tech materials, especially OLED and nurture its OLED polarizer business".
OLED circular polarizer market (2016-2022, DSCC)In 2018 DSCC estimated that the OLED circular polarizer market will grow from $428 million in 2017 to $1.27 billion in 2022. The market is still dominated by mobile displays. In 2018 the OLED circular polarizer market was led by Sumitomo Chemical and Nitto Denko, with LG Chem increasing its market share in OLED TVs polarizers.

Omdia sees 73 million foldable AMOLEDs displays shipped in 2025

Omdia says that the global foldable OLED display market will grow from 700,000 units to 3.9 million in 2020 (a 5X increase) - and will continue its fast growth to reach 73.1 million in 2025.

TCL foldable OLED device prototype, MWC 2019

Omdia says that the main challenge of the foldable OLED market is the reliability of the displays - mainly the cover, the touch sensor and the polarizer films. Display makers will need to adopt new technologies such as ultrathin glass covers (UTG), touch sensors on TFE and color filters on TFE

Researchers develop PLED materials with circularly polarized luminescence

Researchers from the Imperial College London developed a new class of PLED materials that exhibit circularly polarized luminescence. Basically this means that the new materials emit polarized light which could make for more efficient Polymer-OLED devices as none of the light will be blocked by the external anti-glare circular polarizer added to the display.

In 2013 researchers from the ICL has reported they are researching the usage of Helicenes as emitter materials in PLED devices that also emit circularly polarized light - the researchers termed these devices CP-OLED (Circularly-Polarized OLED). Helicenes materials are thermally-stable polycyclic aromatics with helically-shaped molecules.

Merck - Advancing Display, Advancing LifeMerck - Advancing Display, Advancing Life