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:

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.

UDC: our RGB1B2 AMOLED architecture minimizes blue light hazard

In 2010 Universal Display announced a new AMOLED display architecture called RGB1B2 that uses two blue sub-pixels - a fluorescent deep-blue and a phosphorescent light blue. The introduction of a light blue sub-pixel can significantly extend the operational lifetime of an OLED display and reduce the display's power consumption by as much as 33%.

UDC RGB1B2 AMOLED architecture, blue light (OLED Korea 2019)

The RGB1B2 was never adopted (one of the reasons is that adding another sub pixel complicates the TFT backplane and has other disadvantages - but the architecture is now again on the table and UDC presented it again at OLED Korea 2019.

AnandTech: Huawei uses panels from LGD and BOE in the P30 Pro

Last month Huawei launched its P30 and P30 Pro smartphones (with a 6.1" 1080x2340 AMOLED on the P30 and a 6.47" 1080x2340 AMOLED on the P30 Pro). Reports from China suggested that Huawei adopted SDC AMOLED for the P30 and BOE-made panels on the P30 Pro.

Huawei Mate P30 Pro photo

According to Anandtech, who posted an extensive review of the P30 and P30, the supplier for the smaller 6.1" AMOLED on the P30 is indeed Samsung Display, but Huawei uses both LG Display and BOE as suppliesr for the large 6.47" AMOLED on the P30 Pro.

MagnaChip launches its 28 nm AMOLED drivers

OLED driver maker MagnaChip launched its latest 28 nm OLED Display Driver IC for smartphone displays. MagnaChip says that it is using the world's most advanced process for OLED drivers, which enables it to achieve a 20% reduction in form factor compared to its previous 40 nm process.

In addition to the size reduction, the new process also enabled MagnaChip to reduce the voltage from 1.1V to 1V, which reduces the power consumption by more than 20%, and it also reduces the EMI levels (again, by 20%) which improves the phone's call quality.

Cambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDsCambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDs