According to different  media reports, Two related companies have filed lawsuit against Apple for a patent infringement in US Disctrict Court of Delaware.

Picsel Technologies and Picsel Research both based in Glasgow, Scotland has claimed their rights of screen rendering technology used in the iPhone and iPod Touch. According Dow Jones reports, Lawsuit includes detail like Apple is violating the Piscel Technology to quickly render graphics on the iPhone’s display.

According to Macworld, Both companies want compensation for using technology on devices already sold all over the world.
With information given on Piscel’s site, its customers base include giant mobile companies like Motorola, Nokia, NTT DoCoMo , Palm, Samsung, Sharp and Sony Ericsson.