AMOLED is the acronym for Active Matrix Organic Light Emitting Diode. This is the latest emerging technology as far as monitors and screens are concerned. It can also come in small sizes enabling it to be incorporated in mobile phones or digital cameras. The OLED display actually describes a special type of ultra thin and bright form of display technology that does not require backlight to function. AMOLED is thus progressing towards low power consumption. It can also be incorporated in large applications such as a 40-inch TV.
The AMOLED is the technology that deals with pixels. Technically an AMOLED display contains many OLED pixel deposits, that are integrated with a TFT (thin film transistor) array in order to form a matrix of pixels. These pixels are specified by the depositions of the organic materials in a dot pattern. Each and every pixel needs to activated separately; this, is done by the respective circuitry that delivers the voltage to the proper anode and cathode layers, and hence stimulating the central organic layer. On electrical activation, this matrix of pixels illuminate light so that, the whole unit functions as a series of switches. This in turn controls the amount of current that flows into each pixel. In this way the TFT layer advises each pixel about the level of brightness to be displayed.
This continuous current flow is monitored by atleast 2 TFT’s per pixel. One is to start as well as stop the charging of the capacitor while the other one is to provide the necessary voltage source that is required for generation of current. This factor eliminates the need for very high currents. Therefore an AMOLED screen is made up of four separate layers; a circuit bottom layer, an anode layer on top of it, a central organic layer and a cathode layer at the top.
This technology offers some great benefits such as faster switching speeds, exceptional viewing angles, lower power consumption and competitive costs. The main advantage of an AMOLED screen is its less power consumption. This factor makes it an ideal unit for all the portable electronic gadgets where power consumption is a critical factor. The other merit of using an AMOLED screen is its lighter weight and thinner structure. It also comes with minimal breakage tendency, and is highly rugged. Due to its tough and rugged structure, it can be easily transported and stored. Also it is a low cost device as compared to LCD displays. The only possible disadvantage is that it is very difficult to read in bright sunlight.
This technology has been incorporated by Samsung in its latest digital camera series WB500, WB550 and WB1000. The Samsung TL320 Digital Camera, is one of the first digital camera that has incorporated the AMOLED screen display.
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