AMOLED (Active-Matrix Organic Light-Emitting Diode) has been touted as the future of display technology . A report by the Koreaittimes highlighted that, “AMOLED is the future of the display industry highlighting its flexibility and transparency. Samsung’s Galaxy Note 2, expected to be released next month, uses a 5.5 inch flexible display. The report went on to state that, “LG Display was selected as a supervising organization for the transparent and flexible display project led by the Ministry of Knowledge Economy in South Korea. This project aims to develop a 60-inch flexible and ultra-definition display with over 40 percent transparency by 2017, with the government investing over USD 50 million in the LG Display’s consortium that includes SMEs, universities and research centres.”
South Korean companies have been able to successfully mass produce AMOLED displays, despite leading nations such as Taiwan, Japan and China huge investment in the display industry. Samsung and LG dominates the global LCD market with around 50% share are now inclined to investing more on AMOLED, with Samsung holding 97% market share with its entire line-up of Galaxy using AMOLED. According to OLED-Info, Samsung currently makes displays sized 2″ to 7.7″ and has two AMOLED production plants. Samsung is the using AMOLEDs in many of their gadgets – including the Galaxy S II, Galaxy Nexus, Focus S, Galaxy Note and Galaxy S. Samsung’s Galaxy Tab 7.7″ Android Tablet has a 7.7″ Super AMOLED Plus panel – and this is the commercial product with the largest OLED on the market. The company also have several AMOLED cameras available such as the B850F, NX200, TL350, HZ35W and others.
Let us look at the two terms, OLED and AMOLED. Samsungblog decrbribes the difference as follows:
OLED: Organic Light Emitting Diode is a new screen technology to rival LCD and plasma. AMOLED: Active Matrix Organic Light Emitting Diode. There is no substantial difference between the two. Active Matrix is a method for controlling individual pixels. How it works OLED pixels are self illuminating, unlike your traditional LCD screen which requires back lighting. This means less power consumption and longer battery life and thinner displays. This is not the only benefit of having OLED screens. They offer SUPERIOR brightness, viewing angle, response time and contrast ratios. Not to even mention that the screens are so flexible to fit in phone screens and cameras. OLED is the new generation of screens Soon you will see OLED displays replacing TV screens. However, the technology is quite pricey for larger screens at the present time.
Video: AMOLED explained.
Oled-Display provides more information on AMOLED and how it works. The report states, “Active matrix (AM) OLED displays stack cathode, organic, and anode layers on top of another layer – or substrate – that contains circuitry. The pixels are defined by the deposition of the organic material in a continuous, discrete “dot” pattern. Each pixel is activated directly: A corresponding circuit delivers voltage to the cathode and anode materials, stimulating the middle organic layer. AM OLED pixels turn on and off more than three times faster than the speed of conventional motion picture film – making these displays ideal for fluid, full-motion video.”
Passive-Matrix Structure ———————— Active Matrix Structure
Two primary TFT backplane technologies, poly-Silicon (poly-Si) and amorphous-Silicon (a-Si) are used today in AMOLEDs.
Here are a several images and videos highlighting the advantages and in some cases the disadvantages of AMOLED in comparison to the other displays on the market:
Video of AMOLED in action: