Article last updated on: Jan 29, 2019

OLED displays use organic materials that emit light when electricity is applied. OLEDs enable emissive, bright, thin, flexible and efficient displays - and so OLEDs are set to replace LCDs in all display applications - from small displays to large TV sets.

Royole FlexPai developer device photo

AMOLEDs today

AMOLED displays today are used in many applications - and are most common in smartphones. Samsung for example uses AMOLED displays in most of its high-end phones, including the latest Galaxy S9 and S9 Plus and the Note 9. Apple's new iPhones, SmarthWatches, and the MacBook Pro's Touch Bar are all using AMOLEDs. Other AMOLED devices include smartphones from Huawie, Sony, Xiaomi and others.

Samsung GS6 and GS6 Edge photo

AMOLED displays are also used in OLED TVs - which are mostly available from LG. OLED TV screens range from 55" to 77" (88" 8K ones are coming in 2019), and are considered to be the best TV panels ever produced. In 2019 we will have the first rollable OLED TV - LG's 65" Signature OLED R.

AMOLED: Active Matrix OLED

The term AMOLED means Active-Matrix OLED. The 'active-matrix' part refers to the driving electronics, or the TFT layer. When you display an image, you actually display it line by line (sequentially) as you can only change one line at a time. An AMOLED uses a TFT which contains a storage capacitor which maintains the line pixel states, and so enables large size (and large resolution) displays.

AMOLED vs PMOLED

A PMOLED uses a simpler kind of driver electronics - without a storage capacitor. This means that each line is turned off when you move to the next line. So let's say you have 10 rows in your display - each row will only be on 1/10 of the time. The brightness of each row has to be 10 times the brightness you'd get in an AMOLED. So you use more voltage which shortens the lifetime of the OLED materials and also results in a less efficient display. So while PMOLEDs are cheaper to make than AMOLEDs they are limited in size and resolution (the largest PMOLED is only 5", and most of them are around 1" to 3"). Most PMOLEDs are used for character display, and not to show photos or videos.



2 color 0.96-inch PMOLED

Flexible, foldable and rollable AMOLEDs

One of the main advantages of AMOLED displays is that they can be made flexible. Flexible AMOLEDs are already popular for many years in smartphones and wearables, and in 2019 we will experience the first foldable devices and rollable screens.

Transparent AMOLEDs

Several companies are developing large transparent AMOLED displays - and in past years we've seen many prototypes - including a large 55" Full-HD transparent TV. But this technology is not commercial yet, mostly it seems because there are no useful applications that will convince the display makers to mass produce such panels.

Looking to buy an AMOLED display?

Are you looking to adopt an AMOLED display for your device? Several producers are already making panels - including Samsung Display, LG Display, EverDisplay, Truly, Visionox and more. AMOLEDs on the market range from small 1-inch ones for smartwatches through large OLEDs used in tablets and laptops - to large TV panels.

OLED-Info offers the OLED Marketplace, the world's most comprehensive OLED catalog. Just browse the available panels, and let us help you secure the best supplier for your needs.

The latest AMOLED news:

CSoT demonstrates its first foldable AMOLED prototype

China-based CSoT demonstrated a foldable OLED prototype at SID DisplayWeek 2019, I believe this is the first time the company has shown a foldable display.

CSoT recently started pilot production at its 6-Gen LTPS flexible AMOLED production line in Wuhan and the company already achieved some design wins with "top-class" phone makers and is expected to start shipping OLED displays to its customers in Q4 2019. The Wuhan fab will have a monthly production capacity of 45,000 6-Gen substrates.

China-based JD.com: sales of the OnePlus 7 Pro in China are far surpassing Samsung's GS10+ sales

JD.com, a popular online retailer in China, says that sales of the OnePlus 7 Pro are more than ten times higher than the sales of Samsung's flagship Galaxy S10 Plus (which has a comparable display size). JD says that there were 250,372 OnePlus units sold - compared to only 23,266 GS10+ units.

OnePlus 7 Pro photoThe OnePlus 7 Pro is the company's flagship smartphone that features a large 6.67" 90Hz 1440x3120 Fluid AMOLED (which is apparently a 90Hz Super AMOLED) full-screen display with an under-the-display fingerprint sensor. The GS10+ sports a 6.4" 60Hz 3040x1440 (522 PPI) Super AMOLED display.

Huawei delays the launch of its foldable OLED Mate X smartphone

In February 2019 Huawei launched its first foldable smartphone, the Mate X with a 8" 2200x2480 foldable AMOLED display that folds outwards. Huawei said it will launch the Mate X by the end of June, but now the company says it is now planning to release it in September.

Huawei says that it needs more time to test the device and make sure it is durable. It is also possible that the US ban on Huawei is behind this decision.

Visionox demonstrate PixelWork's visual processors coupled with its flexible OLED displays

Visionox collaborated with visual processing developer PixelWorks to demonstrate how PixelWork's power efficient processors can enhance the visual quality of Visionox's flexible OLED displays. The demo was based a 5.9" 2160x1080 60Hz flexible AMOLED display.

Visionox and Pixelworks flexible OLED demo (SID 2019)

PixelWorks' Iris platform provides a cost effective solution to provide high-end TV-like HDR experience on a smartphone. The processor enables automatic adaptive displays (that can adapt to the ambient conditions, the content on display, color temperatures and more).

TCL starts flexible OLED pilot production at its Wuhan CSoT fab

China-based display maker TCL announced that its 6-Gen LTPS flexible AMOLED production line in Wuhan has commenced operation. The company already achieved some design wins with "top-class" phone makers and is expected to start shipping OLED displays to its customers in Q4 2019.

TCL's production line in Wuhan (which is actually owned by the company's subsidiary CSoT) will have a production capacity of 45,000 6-Gen substrates.

OnePlus launches the 7 and 7 Pro smartphones with high quality AMOLED displays

OnePlus launched it latest flagship smartphones, both of whom utilize high-end AMOLED displays. We'll start with the OnePlus 7 Pro - a flagship smartphone that features a large 6.67" 90Hz 1440x3120 Fluid AMOLED - which apparently is a 90Hz Super AMOLED. This is a full-screen display that has an under-the-display fingerprint sensor.

OnePlus 7 Pro photo

The OnePlus 7 has a smaller notch-type 6.41" 1080x2340 Optic AMOLED - which is again OnePlus' own display marketing term for an SDC's Super AMOLED. It seems as if OnePlus brands its regular 60Hz AMOLED displays as Optic Displays - and its higher-end 90Hz ones as Fluid AMOLEDs.

Samsung starts shipping the Super AMOLED Galaxy Tab S5e

Samsung started shipping its flagship tablet the device, the Galaxy Tab S5e - Samsung's thinnest tablet yet at 5.5 mm. The S5e features a 10.5" WQXGA (2560x1600) Super AMOLED display with a 81.8% screen-to-body ratio.

Samsung Galaxy Tab s5e photoSamsung's Tab S5e offers mid-range performance with a snapdragon 670 octa-core chipset, 4/6 GB of RA and 64/128 GB of storage (with a microSD slot). The 7,040 mAh battery provides up to 14.5 hours. The Galaxy Tab S5e is now shipping starting at $399.

The 4th International TADF Workshop 2019The 4th International TADF Workshop 2019