Samsung Electronics and LG Electronics, respectively the world's largest and second largest flat-screen TV makers, each claim their technology offers more vivid images and wider viewing angles.
The two firms, both driven by newly-appointed leaders, are striving to set the 3-D industry standard. Market researcher DisplaySearch forecasts that 3-D will account for 41 percent of all flat-screen shipments worldwide by 2014, compared to two percent last year.
LG champions a technology called film-patterned retarder (FPR), while Samsung uses so-called active shutter glass technology.
The two conglomerates rarely attack each other's products but a war of words began in January at the Las Vegas Consumer Electronics Show.
Exchanges heated up last month when LG reportedly described Samsung's 3-D technology as a generation behind.
The following day, a Samsung Electronics press release said the difference between its product and that of its competitor was "one of night and day".
