Smartphones feature a variety of different display types, from TFT to the new Retina Display of the iPhone 4. Which type you prefer will be down to personal taste and possibly your experiences with previous phones…

AMOLED

AMOLED (Active Matrix Organic Light Emitting Diode) screens are an evolution of the OLED screens which have been around since the early 1990′s. OLED’s are basically a sandwich of two transparent electrodes, with a layer of organic compound between them. When a current is passed through the organic compound it emits light, removing the need for a separate backlight. OLED’s can therefore be thinner and lighter than traditional LED’s and can display deeper blacks and a higher contrast range.

The Active Matrix part of the name is the way that the individual pixels of a display behave. With active matric adressing, each pixel has a switch mechanism which keeps it in a set state whilst the other pixels are being updated. In simple terms, this allows for a much brighter and clearer display than normal OLED.

The first touchscreen AMOLED displays were produced by Samsung in early 2010, when they combined the touch sensor and the OLED into one component. The touch sensor is just 0.001mm thick. AMOLED displays can be found on smartphones such as the HTC Desire and

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