Two OLED Technologies – AMOLED and PMOLED

OLED is a new technology that can be thin, efficient and bright displays. OLEDs are made of organic light-emitting materials and OLED backlight and no filtering need to be used in LCDs. OLEDs are so easy to make and can actually be made flexible and transparent as well. OLEDs are very efficient, and the companies are working on OLED lighting – an OLED "light bulb" will be efficient and thin, paving the way for major new lightingDesigns.

There are two types of OLEDs in displays – PMOLED and AMOLED. The difference lies in the electronic control system – it can be either passive matrix (PM) or active matrix (AM).

With passive-matrix OLEDs, the display is controlled by switching rows and columns. When you light up row and column number x number y is again the pixel at the intersection – and emits light. Each time you select only one pixel to the light. You must turn this on and off very quickly. They do thisin a certain order, and create the desired image. This is something like the interlace system used in the old CRTs, but the control will be pixel-by-pixel.

PMOLED are very easy and cheap to build, but they are limited to small sizes (up to 3 ") in the rule. The picture shows a bit complicated (because of the row) / column method. The power consumption is not as good as AMOLED.

AMOLED have a different driver electronics – each pixel is directly controlled. AMOLED morecreating expensive and much heavier, but can be used for larger displays (current prototypes are up to 40 ") and are very energy efficient.

The first OLED products on the market used PMOLED – these were MP3 players, sub-displays on mobile phones and radio decks for automobiles. The displays were small and usually with only one or two colors. If AMOLED panels started to occur in 2007 and 2008, we have seen these larger displays in mobile video players, digital cameras, cell phonesOLED main displays and even TVs.

PMOLED are still very popular – there are more MP3 players sold today with PMOLED than LCDs. But for larger displays, AMOLED is the best technology and is growing much faster than shown PMOLED. Obviously, for larger displays, including televisions, monitors, laptops or PDAs, AMOLED is the only choice.

Meanwhile, there are numerous companies working on technologies that effectively bridges the gap between PMOLED and AMOLED offers – a kind of hybridSystem. The promise is that this display is also easy to make and the power efficient larger displays. We still have to wait and see whether these technologies actually work on commercial ads. One such technology is the dialogue SmartXtend.

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Posted: November 23rd, 2009 under Hp Document Scanner Articles.