PPI | OLED-Info

On Seeya's OLED microdisplays status and plans

OLED microdisplay developer Seeya Information Technology was established in 2016, and in 2017 it started building a $300 million OLED 300 mm microdisplay production line. Seeya's fab is now in operation, with a yearly capacity of around 20 million displays (monthly capacity of 9,000 300 mm wafers).

Seeya OLED microdisplay photo

Seeya quickly became a prominent display maker, who's currently producing high performance displays to global customers. The company says it's currently the world's largest OLED microdisplay maker by volume. Seeya's current standard displays include:

Visionox shows new OLED technologies at SID Displayweek 2021

Chinese OLED producer Visionox demonstrates several new OLED technologies at SID Displayweek 2021. We'll list some of these new achievements in this post, and you can see these in the video below.

Visionox shows a 'dynamic' 12.3-inch rollable display which feature a 5 mm rolling radius. A 7.92" foldable (2 mm radius) wrap-around display solution. Visionox also demonstrates a 12.3" three-folded OLED that can fold inwards (2.5 mm radius) or outwards (6.5 mm) - to become a 5.4-inch display.

Korea launches a new project to develop 1,000 PPI Oxide TFTs for next-generation OLEDs

The South Korean government launched a new project which aims to develop new technology that will enable the production of Oxide-TFT that support 1,000 PPI OLED panels. The project, led by Samsung Display, will hopefully conclude by 2024.

SDC 806 PPI VR OLED at SID 2016

Samsung plans to develop higher-efficiency Oxide-TFTs - in fact ten times faster than today's Oxide-TFTs. The new technologies will reduce the power consumption and production costs of the TFTs.

Samsung and Stanford researchers develop a novel Metaphotonic OLED structure that enables high performance OLED displays

Researchers from Stanford university in collaboration with Samsung's Advanced Institute of Technology (SAIT) developed a new OLED structure that enables resolution of up to 10,000 PPI, high brightness and a cost-effective production process.

Metaphotonic OLED structure

In the new so-called Metaphotonic OLED structure, the panel is produced on a base layer of reflective metal with nanoscale corrugations. This 'metasurface' can manipulate the reflective properties of light and thereby allow different colors to resonate in the OLED sub-pixels.

Samsung Display developed a 18.2" 350 nits ink-jet printed OLED panel

Samsung Display has developed a 18.2" 2560x1440 202 PPI inkjet-printed OLED display, that features the highest current efficiency of any inkjet-printed OLED, with the brightness at 350 cd/m² (full white).

Samsung Display 18.2'' ink-jet printed OLED (SID DW 2020)

Samsung Display says that the high brightness was achieved by tuning the top-emission device structure with high performance soluble materials. The high pixel resolution was achieved by modulating the jetting waveform for ejecting ink drops and improving the drop placement accuracy by selecting the right ink formulations in terms of viscosities and surface energies.

LG Display showcases a 0.42" 1280x720 OLED microdisplay

This week at SID DisplayWeek LG Display will launch a new OLED microdisplay. Branded as OLEDoS, LGD's display is a 0.42" 1280x720 (3,500 PPI) panel that uses a color-filter based design.

LG Display 0.42'' 1280x720 OLEDoS SID 2020 photo

LGD's microdisplay achieves very high brightness (over 4,000 nits) and the color gamut is quoted as DCI > 97% DCI.

A look into eMagin's AR/VR dPd technology

In 2012, we first heard that eMagin is developing direct emission (or direct patterning, as the company calls it) OLED microdisplays. Fast forward into 2020, and the company is aiming to soon start producing such displays (it already launched its first such panel, see more below). In this article we'll look into the technology and the latest updates from eMagin.

White OLED with CF structure vs dPd structure (eMagin)
All current OLED microdisplays on the market from all producers use a white OLED with color filter. This is a simple design, but it is wasteful in energy, as the filters block around 80% of the light, and in addition to achieve the white color one needs to use a blue OLED emitter (in addition to a yellow one, or red and green ones) - and blue is the least efficient color for OLED emission.

DSCC details the iPhone 12 screens and OLED suppliers

DSCC posted an interesting blog post, in which they detail what they believe to be Apple's iPhone 12 smartphone family specifications.

So we start with the iPhone 12, which will use a 5.42" 2348x1048 (476 PPI) flexible AMOLED display, produced by Samsung Display. DSCC believes the iPhone 12 will use a Y-OCTA integrated touch. DSCC believes that while BOE did not manage to get its panel to the iPhone 12, it may become a supplier in 2021 to the iPhone 12s - if all goes well with the iPhone 12 Max (see below).

INT Tech "lights up" its first OLED microdisplay, a 0.7" RGB 2300 PPI panel

In January 2019 Taiwan-based INT Tech unveiled its proprietary glass-based high pixel density OLED technology, and the company now announced that its first prototype display was produced and successfully tested.

INT Tech's display is a 0.7" 2,300 PPI real RGB side-by-side AMOLED display. INT Tech says that its technology enables larger displays with higher brightness, lower power consumption and a wider color gamut compared to currently available OLED microdisplays which are produced on silicon.

Xiaomi shows the fold-around Mi Mix Alpha concept smartphone in its HK store

In September 2019 Xiaomi unveiled a new "concept" smartphone, the Mi Mix Alpha, which uses a foldable OLED screen wrapped around the phone. Xiaomi said this phone will be produced in small quantities (with a price tag of around $2,800) and indeed it is now displaying it in its shop in Hong Kong:

The AMOLED display, produced by Visionox, is 7.92" in size with a resolution of 2088x2250 (388 PPI).