PPI

BOE technology announced that it developed a new under-the-display OLED camera solution, to enable full-screen smartphone OLED displays with higher quality cameras than before. The company held a ceremony together with ZTE's Nubia and Red Magic smartphone brands, saying that it will supply the display and camera solutions to flagship smartphones from these two brands soon, the Nubia Z70 Ultra and the Red Magic 10 Pro.

BOE says that the new AMOLED displays adopt several innovative technologies, such as SIP ultra-narrow bezels, COP packaging - and the new under-the-OLED camera. The new technology achieves a full 430 PPI resolution for the OLED display including in the camera area, and the smartphones will offer a 95.3% screen-to-body ratio (as there's no notch or punch-hole). 

BOE launched a new flexible AMOLED display, branded as Q10 AMOLED, that has a new OLED stack and delivers increased performance - the company said that compared to its previous flagship OLED stack, it enhances the peak brightness by 12.5%, the lifetime by 33%, and it reduces the power consumption by 10%. The company also says the color saturation and response time is increased.

The new Q10 display will debut at three smartphones, the OnePlus 13, OPPO Find X8 and Vivo iQOO 13. That specific screen is a 6.8" 3168x1440 (510 PPI) 120Hz LTPO AMOLED. DisplayMate tested the new display, and says it is the world's highest performing mobile display ever, seting or matching 21 performance records. It is the first display to receive DisplayMate's A++ rating.

Sony announced a new OLED Microdisplay, the ECX350F, a 0.44" 120Hz 1920x1080 (FHD) microdisplay that offers the world's highest brightness at 10,000 nits. It also offers the world's smallest pixel size at 5.1 um (the PPI is around 5,000).

Sony says that in order to reach this high brightness, it adopted a new OLED stack structure, a new "semiconductor process" and added a microlens array on top of the display. In addition, the bezel size of the new display is exceptionally small, with only 1.14 mm of added bezel on the long side of the display on both top and bottom.

There's an interesting report in Korea that claims that Apple is developing an entry-level MR headset, and is looking to adopt TFT based AMOLED displays, as opposed to the currently-used OLED microdisplays. It is reported that both JDI and Samsung are in talks with Apple, and have been requested to develop lower-cost TFT AMOLEDs with a pixel density of 1,500 PPI (down from 3,400 PPI high-end Sony microdisplays used in the Vision Pro).

It is understood that JDI has already developed the technology and produced 1,500 PPI samples for Apple. Interestingly it is reported that the JDI displays uses Sony's technology, although it is not stated which technology exactly. Samsung meanwhile is also developing 1,500 PPI AMOLEDs at its A2 fab. Apple's target is to release the headset at around 2026-2027 and by then it is likely that more OLED producers (such as LG Display) will develop similar displays. 

During the company's 2024 Innovation Partner Conference, BOE unveiled its latest OLED microdisplay. The display is a 0.9" 4K (6020 PPI) panel, that is based on a tandem OLED architecture. It achieves a maximum brightness of 5,000 nits.

BOE has also unveiled ultra-light (150 grams) VR glasses based on these displays. It is not clear whether this is a product that BOE aims to commercialize, or a reference design, or a product produced by one of its partners.

Yesterday Apple announced its 2024 iPhone 16 series, and its latest smartwatch devices - all based on OLED displays. We'll start with the the iPhone 16 that offers a 6.1" 2,000 nits (HBM) 1179x2556 Super Retina XDR LTPS AMOLED, while the iPhone 16 Plus offers a larger 6.7" 1290x2796 display. Both phones are based on Apple's latest 3nm A18 chipset offering improved performance and AI support.

The iPhone 16 Pro has a more advanced 6.3" 120Hz 2,000 nits (HBM) 1206x2622 LTPO Super Retina XDR OLED. The 16 Pro Max offers a larger 6.9" 1320x2868 AMOLED. These new phones are based on Apple's 3 nm A18 Pro chip, offer a "huge leap in battery life", support Apple Intelligence and feature new a main camera.

Researchers from ETH Zürich and the Huazhong University of Science and Technology developed a new scalable fabrication technology that enables the deposition of extremely small OLED pixels. The so-called nano-OLEDs achieve a pixel density of 84,000 PPI, or even higher. The pixel size is around 100 nm, the smallest pixels ever reported.

The method is based on direct nanomolecular patterning of the OLED materials, realized by self-aligned evaporation through nanoapertures fabricated on a free-standing silicon nitride film adhering to the substrate. The researchers report that the average nano-OLED EQEs is up to 10%. 

Researchers from Soochow University and the University of Muenster have developed a method to produce ultra high resolution OLED microdisplays - with up to 20,000 PPI.

To achieve such high resolution, the researchers used a method they refer to as "first surface patterning and then patterned growth". The idea is that the substrate is first patterned using lithography, and then the organic materials are deposited. Following the substrate treatment, the organic materials are diffusing on the substrate, selectively grown on the designated areas.

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.