The 2012 International Consumer Electronics Show (CES), the world's largest consumer technology trade show, kicked off officially in Las Vegas on Tuesday, unveiling more than 20,000 latest products from the consumer electronics industry.

This year's exhibit space reaches 1.851 million net square feet, marking the second largest show in CES history following 2008's 1.857 million net square feet, according to the U.S. Consumer Electronics Association (CEA), the organizing body of the trade show.

More than 2,700 companies are debuting over 20,000 innovations and products across all sectors of the consumer electronics industry, including smart TV, OLED TV, Ultrabook, smartphone eye- tracking technology, 3M Touch Systems and so on, said the association, expecting that this year's CES would be the most innovative show on record.

In addition to exhibitors, some major technology companies, including Apple, Facebook, Twitter, HP and Dell, will also send significant delegations to 2012 show.

"We assume the industry had done very well in 2011 compared with almost other industry," said Gary Shapiro, president and CEO of the CEA, adding that the industry would continue to grow in 2012.

This year's CES will go through Friday, January 13.