Sony, Sony Corporation of America, Sony Electronics, Sony Computer Entertainment and Sony Computer Entertainment America are all cited in the complaint, says Cnet.
The patents in question relate to "the way a Blu-ray player reproduces data from a Blu-ray disc" and how it "reproduces multiple data streams by way of multiple camera angles."
Finally, LG says Sony is violating a patent relating to the display of subtitles in Blu-ray films.
LG's choice, over 1500 days after the PS3 launched in the U.S., seems like a direct retaliation for Sony's complaint filed with the ITC late last year over patent violations in mobile phones.