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Apple unveils its HD iPad

Apple has unveiled a new iPad with a high-definition screen, which it claims will take tablet computers to "a whole new level".

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Samsung files second tablet patent lawsuit against Apple

Samsung Electronics has filed a second patent lawsuit against Apple in South Korea, alleging infringement of tablet and smartphone technology.

The lawsuit filed earlier this week in Seoul alleges that Apple's iPhone 4S and iPad 2 infringe three of Samsung's patents.

Apple sued Samsung in the United States in April last year and Samsung sued Apple in South Korea in the same month.

Apple claims Samsung's Galaxy tablets and smartphones "slavishly" copied its iPhone and iPad models.

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