Sunday, February 26, 2012

No. 448: A new drive element for the electroluminescence display (February 27, 2012)

The market of the organic light emitting display is expected to grow dramatically in the near future because the organic EL TV will be thinner and higher in image quality than the LCD TV. The thin-film transistor (TFT) affects greatly the image quality and power consumption of an organic EL TV. Idemitsu Kosan built a trial product of a drive element to be used for the organic EL display using new materials. It has over 40 times more processing capacity than the drive element made of silicon currently widespread and over 4 times more processing capacity than the new element to be employed by Samsung Electronics.

The company built the trial product using a semiconductor material of indium gallium oxide (IGO). It adjusted the blending quantity of gallium and developed a high-quality and polycrystal thin film using its self-developed film forming technology. The new element has more than 40 times higher mobility than amorphous silicon. Samsung Electronics is reported to consider adopting indium gallium zinc oxide (IGZO) developed by a researcher of Tokyo Institute of Technology (TIT). Idemitsu’s new product has four times higher mobility than the TIT’s product, thus the element can be smaller.       

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