Glass

Researchers from the Korea 's SNU, KAIST and KIMM developed a new lift-off process for flexible OLED displays, based on graphene. The researchers term the new method GLLO, or Graphene Laser Lift Off.

The researchers placed a single-layer CVD graphene film between the polyimide film and the glass carrier. The graphene, with its ability to absorb ultra-violet light and distribute heat laterally, enables a clean lift-off without any wrinkles or residues. Using the GLLO method, the researchers successfully separated 2.9 μm thick ultrathin PI substrates without any mechanical damage or carbon residue left behind. In contrast, traditional methods left the substrates wrinkled and the glass carriers unusable due to stubborn residues. This breakthrough has far-reaching implications for stretchable electronics and wearable devices.

In late 2024 we reported several times that demand for Apple's iPad Pro devices is lower than expected, and the company reduced its OLED panel orders from both Samsung and LG.

According to a new report from Korea, LG may decide to start using its IT AMOLED production line to produce smartphone displays. The company looks to supply 70 million iPhone AMOLED displays to Apple in 2025, up from around 65 million in 2024 (and 52 million in 2023). Converting the IT AMOLED line to smartphone panel production will enable LGD to increase capacity without a large investment in new equipment.

China-based Bengbu Zhongguang Optoelectronics Technology, in collaboration with researchers from the CNBM Glass New Materials Research Institute have developed China's first 8.6-Gen glass substrate product.

The reports from China suggest that the first substrate samples have been produced at Bengbu's production line, and the company is ready to start mass producing the substrates commercially.

The Elec reports that Korea's Chemtronics is constructing a new fab at Sejong City that will be able to etch 8-Gen OLED substrates. This fab is built specifically for Samsung Display's new 8-Gen IT AMOLED line. The Elec said that Chemtronics already spent almost $70 million on this new fab, with Samsung supporting it with an investment as well.

The new fab will receive finished 8-Gen IT TFE rigid AMOLED panels from Samsung Display's upcoming A6 line, on a glass substrate. The new etching fab will reduce the thickness of these OLEDs from 0.5 mm to 0.2 mm, to enable lighter and thinner tablet and laptop OLEDs.

China's Hongqi launched its latest luxury executive sedan, the Guoya (国雅), as part of the Hongqi Golden Sunflower series. The model was previously known as the HongqiL1.

The Hongqi Guoya adopts a 14.2" rollable (sliding) AMOLED display for the center multimedia display. This is the first time such an automotive sliding AMOLED display is produced commercially (and the only second rollable screen following LG's 2020 rollable 65" OLED TV which is now discontinued). The AMOLED display is produced by Visionox, and we know that it adopts an Ultra-Thin-Glass cover. Visionox says that the display weights less than 250 grams, and it has been tested for over 200,000 cycles. 

A report from Korea suggests that Dowoo Insys is planning to IPO in 2025. The company will list on the Korean Exchange, and it plans to file the preliminary information and documents by the end of the summer.

Dowoo Insys was established in 2010, to develop glass products for the display industry. The company's main product is thin flexible glass covers for foldable displays - UTG glass - which it supplies to Samsung Display (its main customer). Dowoo does not produce its own glass - it buys flexible glass from Schott and then treats it in its own facilities. 

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.

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').

Omdia says that shipments of OLED displays in tablets are set to grow in the future, rising from around 3.8 million in 2023 to 35 million in 2031. 2024 will see a 315% jump in shipments as Apple starts to adopt OLEDs in its tablets.

Interestingly, Omdia sees an increase in adoption of a 'hybrid OLED' structure (reaching a market share of 85.1% in 2031), which the company defines as a glass-based OLED with a thin-film encapsulation. This hybrid design is lower in cost compared to a flexible OLEDs, while still achieving high performance and a thin design. 

According to reports in China, strong demand for flexible AMOLED panels for high-end smartphones, have resulted in an increase of panel price. This has caused smartphone makers to adopt more rigid AMOLED panels in their budget smartphones.

The report suggests that Samsung Display is especially enjoying an increase in sales of its rigid AMOLED panels to smartphone makers in China - mainly OPPO, vivo, and Xiaomi. These smartphone makers are replacing LCD displays with Samsung's rigid AMOLEDs - as the price difference is currently quite small.