Samsung have posted their Q4 2011 official earnings, and they have done quite well indeed. Samsung had an operating profit in Q4 2011 of $4.7 billion from $42 billion in sales.

How did Samsung reach this success? Oh, by selling more than 300 million smartphones last year alone. Mobile accounted for roughly 40-percent of Samsung's sales, and nearly 50-percent of their operating profit, Samsung's semiconductor business also did very well, taking in more than $2 billion in profit over the same period.

Samsung's Display Panel business was improved year-over-year compared to 2010, thanks to LED TVs, with sales up almost 20-percent to $7.6 billion. Samsung expects good things for 2012, with mobile business to grow, LTE and new market segments like the Galaxy Note to drive sales. TVs are expected to continue their rise, with Samsung releasing more Smart TVs, and the 2012 London Olympics will help, too.

Check our their official earnings report, here.