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 OLED (Organic Light Emitting Displays) are a new technology that uses organic materials to produce light. When thin layers of this material are sandwiched between appropriate anode and cathode layers, a relatively modest voltage (typically 2-10 volts) applied across the material will cause it to emit light in a process called electroluminescence. This combination of anode materials, cathode materials and light emitting organic materials forms an OLED.
There are two essential types of OLEDs - small molecule (SMOLEDs) and polymer OLEDs (poly-OLED). While the essential operation of these two types are quite similar, there are differences in the process used to manufacture them. SMOLEDs use organic materials with a relatively small molecular structure. This material must be applied using sophisticated vacuum vapour deposition techniques. Poly-OLEDs use organic material s with much larger molecular structures, which allows simpler spin coating or printing techniques to be used to apply the organic layer.
The most important thing about OLEDs is that they are an emissive display technology, meaning that they generate their own light. LCDs are passive displays, and simply transmit or block an external light source to form an image. The light source for LCDs is typically either ambient light reflected by a metallic layer of a backlight system behind the display glass. Emissive displays go not need ambient light of a back light to make them viewable. This eliminates the cost, space weight and power consumption of a back lighting system, and offers an images with much higher contrast. In addition to this OLED displays offer a much wider viewing angle of 160 degrees.
OLED display modules have been produced in a wide variety of colours, including the primaries red, green and blue. For full colour displays, a matrix made up of tiny triads of OLEDs with the three primary colour pixels is used to produce thousands of different colours by varying the intensity of each primary colour.
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The OLED development kit operates on a standard desktop or laptop PC and allows quick download of selected images. Contrast levels, gamma tables, and many other useful functions are incorporated into a user-friendly PC interface.
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