Gadget Watch: New TV screen technology

Gadget Watch: New TV screen technology

LAS VEGAS Samsung Electronics Co. and LG Electronics Inc. are showing off 55-inch TV sets that use organic light-emitting diodes, or OLEDs, instead of plasma or liquid crystals. The TVs were unveiled this week at the International Consumer Electronics Show, an annual showcase in Las Vegas for the latest smartphones, tablet computers and other consumer-electronic devices. In 2007, Sony Corp. started selling an 11-inch OLED TV for about $2,500, but it never followed it up with a bigger mode...

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