PPI | OLED-Info

INT Tech unveils its ultra-high density OLED display technology

Taiwan-based INT Tech unveiled its proprietary glass-based high pixel density OLED technology, that enables the production of over 2,200 PPI displays on glass. Such high resolution displays can find applications in the visually demanding devices in the medical market, the defense market and also for VR headsets.

INT Tech 2.17-inch 2228 PPI OLED display prototype
INT Tech demonstrated a 2.17” 2,228 PPI prototype (see image above). This technology can compete with OLED microdisplays (Silicon based) for high-end VR solutions for 2 merits: they can be larger than silicon-based OLED microdisplays to achieve higher FOV, and they are at a much lower cost.

SEL shows a 8.3" 8K OLED with 1058 PPI, and a new foldable OLED prototype

Semiconductor Energy Laboratory (SEL) demonstrated two new OLED display prototypes, both based on the company's proprietary CAAC-IGZO (c-axis aligned crystalline In-Ga-Zn-O) backplane material.

SEL 8.3-inch 8K OLED prototype (Dec 2018)

First up is the world's smallest 8K display, a 8.3" OLED (1058 PPI) with a resolution of 7680x4320. The panel is based on a white OLED with color filter architecture.

Royole launches a foldable smartphone/tablet developer device

US and China based Royole launched the world's first foldable OLED device - the FlexPai phone/tablet. The FlexPai has a 7.8" 1920x1440 (308 PPI) AMOLED display, when unfolded, The display folds outwards, and when folded the device has three different displays (front, back and spine).

Royole FlexPai developer device photo

Royole is now accepting pre-orders for the "Developer Mode" device, starting at $1318 for the 128GB model. The first devices will ship in late December 2018. The company said the device has passed bending, twisting and tension tests over 200,000 times, and the display is much more durable compared to current displays (as it is not covered by glass).

The Fraunhofer FEP demonstrated the LOMID 1-inch OLED microdisplay at SID 2018

In January 2015 the EU launched the LOMID project to develop next-generation large-area OLED microdisplays, and in 2017 the partners in the project announced the production of a 1-inch diagonal 1200x1920 (2,300 PPI) 120Hz curved OLED microdisplay.

The Fraunhofer FEP demonstrated this panel at SID 2018, as you can see in the video above. The institute also demonstrated a new design which uses two such panels and special optics to provide double the resolution for each eye.

Visionox demonstrates its latest PMOLED and AMOLED displays at SID 2018

China-based OLED producer Visionox had a very impressive booth at SID 2018, demonstrating the company's latest AMOLED and PMOLED displays and prototypes.

Visionox is now producing AMOLED displays for smartphones and wearables and the company showcased a wide range of AMOLED panels and also commercial phones that use these panels. Visionox also demonstrated many new display prototypes.

BOE unveils a 0.39" FHD OLED microdisplay at SID 2018

In March 2017 OLED maker BOE Technology and OLED Microdisplay maker OLiGHTEK announced a new $170 million joint-venture to produce OLED microdisplays for the consumer VR and AR markets. This will be the world's largest OLED-on-silicon production line that will have an annual production capacity of a million OLED microdisplays, although we have no details on to when it will begin operation.

At SID 2018, BOE quietly demonstrated a new OLED microdisplay - a 0.39" FHD (1920x1080, 5644 PPI) OLED on silicon, that supports a brightness of 3,500 nits and a refresh rate of 90 Hz. It's not clear how close is this display to commercialization, and whether it is part of the JV with OLiGHTEK.

BOE demonstrates its first inkjet-printed OLED prototype at SID 2018

China's largest display maker BOE Display has an active OLED ink-jet printing project, and according to reports the company is establishing an R&D production line (in Hefei) that uses Kateeva's inkjet deposition equipment.

At SID 2018, BOE demonstrated a printed OLED panel for the first time. Surprisingly this is a small mobile OLED display - a 5.5" FHD (400 PPI) flexible AMOLED. It is usually assumed that inkjet printing is limited to around 200 PPI, and so only useful to large area panels (such as TVs or monitors). JOLED's 21.6" 4K printed OLEDs have a PPI of 204, for example. In 2017 Korea-based Unijet's president said that Inkjet printing could reach up to 550 PPI in 2020 by using next-generation laser-droplet technologies.

LG Display demonstrated its latest OLEDs at SID DisplayWeek 2018

LG Display showcased several of its OLED technologies at SID DisplayWeek. The most impressive display was a 77" panel that is both flexible and transparent. The large panel features a 4K (3840x2160) resolution and 40% transmittance. The bending radius of the display is 80 mm. This seems to be the same display announced in June 2017.

LGD also demonstrated, for the first time, its VR OLED display, developed in collaboration with Google. This is a 4.3" 3840x4800 (1443 PPI) glass-based display on an LTPS backplane, that supports a refresh rate of 120Hz.

Video shows Visionox's latest flexible and foldable OLED panels and prototypes

Visionox showcased it latest flexible OLEDs in a recent tradeshow, and Notebook Italia published this interesting video showing all of Visionox's displays.

Visionox is showing several interesting displays - a 5.99" 1080x2160 (403 PPI) AMOLED edge type flexible OLED, a full-screen 5.99" 2160×1440 flexible AMOLED and a 6.21" notch-type 2160×1440 AMOLED, with a touch sensor under the screen.

AUO developed a transparent 13" OLED for AR applications

Taiwan's AU Optronics (AUO) developed a 13-inch 100 PPI transparent OLED display, specifically for AR applications. This is a highly-transparent display - with 68% transmittance.

AUO transparent OLED prototype

AUO 6" transparent OLED prototype (2011)

To achieve such high transparency, AUO optimized the TFT array layer stack, the OLED cathode pattern and the encapsulation. This is the first transparent OLED AUO has developed since 2011. It will discuss this new display at SID Display 2018 - and will hopefully demonstrate it as well.