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.
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.
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.
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.
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:
The local government at Shucheng, Anhui Province, China, has launched a new five year initiative where one of the goals is to establish a display industry cluster with a focus on OLED technologies.
According to a report from China, the first major display project within the initiative involves the establishment of an AMOLED touchscreen production base - as Shucheng aims to become the world's largest producer of OLED touchscreens.
China-based OLED producer Visionox demonstrated a beautiful rollable OLED prototype:
We don't have any information about the display, but the demo looks great - complete with a notch in the OLED (not clear if that's just part of the image displayed, though).
This is a high-end AMOLED display that is available at an attractive price through a reliable supplier in China. Check out more information over at the OLED Marketplace, or contact us now.
In February 2019 Huawei announced its first foldable smartphone, the Mate X with a 8" 2200x2480 foldable AMOLED display that folds outwards. Huawei hoped to launch it in the summer of 2019, but it faced several delays. Yesterday Huawei finally announced that the Mate X will start shipping on November 15th.
The price of the Mate X will be 16,999 Yuan (around $2,400) - even higher than Samsung's $2,000 Galaxy Fold. Obviously this is a premium device for early adopters. The 8" foldable AMOLED display is produced by BOE.
Apple developed its LTPO backplane technology for OLED displays to enable power saving of around 5-15% compared to LTPS AMOLEDs. LTPO was adopted in Apple's Watch Series 4 and Watch Series 5 smart watches - with the panels produced by LG Display using Apple's technology and IP.
According to a new report from Korea, Samsung has recently developed its own brand of LTPO backplane technology and has started to produce such panels - which are adopted by the company's latest smart watch, the Galaxy Watch Active 2 (which recently started shipping). The watch has a 1.2" 360x360 or 1.4" 360x360 round AMOLED displays.
According to a new report from Korea, Samsung Display will supply around 40-50 million flexible AMOLED displays to Apple in the second half of 2019. Apple's latest iPhone lineup was met with positive market response (this was already reported earlier this month by Bloomberg).
According to the report, Samsung supplied Apple with 3.9 million OLEDs in July, 8.4 million in August and 9.9 million in September. Apple's original plan was to order 6.9 million panels in September but demand was stronger than expected.
In April 2019 Reuters reported that Japan Display (JDI) signed a deal with Apple to supply it with AMOLED displays for its smartwatches, and today JDI's new CEO Minoru Kikuoka said that the company recently started producing OLED displays - likely indeed this is low volume production for Apple's wearables.
Apple's Watch Series 5 (its latest generation) features a 324x394 1000-nits always-on LTPO AMOLED display (368x448 on the 44m model). Apple is currently buying these OLED displays exclusively from LGD.
HP announced a new edition to its 13.3" Spectre x360 13 laptop - which comes with an optional 13.3" 4K AMOLED display. HP will start shipping the Spectre x360 13 OLED in October 2019.
This is the first time we hear of this new 13.3" 4K AMOLED display. In 2016 and 2017 Samsung produced 13" laptop OLED displays - but with a lower 2560x1440 resolution. This was used in an 2016 HP Spectre x360 13 laptop and also in some Alienware gaming laptops. In February 2019 Samsung started to produce 15.6" 4K AMOLEDs for laptops - and it's great to hear that it is now adding a smaller laptop display as well.
Samsung recently re-launched its foldable OLED smartphone, the Galaxy Fold. The company took several months to redesign and make the phone more durable... but it seems as if things are perfect yet.
TechCrunch reporter Brian Heater got a review unit, and the screen got damaged within one day (27 hours, to be precise) of normal use - see photo above - there's a large defect at the center of the photo. Brian said he took good care of the device - just as Samsung suggests. Ironically, when Samsung launched the phone in April, Brian got a unit that worked okay for a few days (until Samsung collected the device back).
DisplayMate tested Apple's latest OLED display, the one used in the iPhone 11 Pro Max (6.5" 2688x1242 458 PPI) and unsurprisingly found that this is top-notch display. Apple improved on the display used in the 2018 iPhone XS Max in several aspects - including 17% higher full-screen peak brightness and up to 15% higher display power efficiency.
DisplayMate especially notes Apple's high-precision display calibration and color accuracy - which is visually Indistinguishable from perfect.