TOKYO/TAIPEI (Reuters) - LG Electronics will steal a march on its rivals by bringing forward the launch of a 55-inch flat TV using next-generation technology, raising the stakes in a cut-throat battle for the living room between Asia's top tech powerhouses.

The South Korean firm will introduce its organic light emitting display (OLED) TV in several European countries in May, well ahead of an original plan to launch in the second half, a source familiar with the matter told Reuters.

That would edge out cross-town rival Samsung Electronics and cement, at least for now, South Korean dominance in the television market over long-time leaders Japan, but it also highlights the fierce competition reshaping Asia's flat panel industry.

"(In the past) if you wanted a top quality TV you had to buy a Sharp, Panasonic or Sony. Those days are gone," said Steve Durose, Senior Director and Head of Asia-Pacific at FitchRatings.

The Japanese, who ruled the global TV market in the 1980s and 1990s, have been battered by their aggressive South Korean rivals, weak demand for the TVs they make and a stronger yen that erodes the value of the their exports. Sony Corp, Panasonic Corp and Sharp Corp expect to have lost a combined $21 billion in the business year just ended.

Some 200 kms across the Korea Strait, LG Electronics is expected to report a quarterly profit of $267 million later on Wednesday, even after LG Display, a flat-screen maker in which it has a near-38 percent stake, posted a $156 million operating loss for January-March. On Friday, Samsung will announce a record profit of $5.2 billion for its latest quarter alone.

The red ink bleeding across Japan's tech industry comes at a time when the TV market is heading for a technology choice - between credit-card-thin OLEDs or ultra-high definition sets - that may consign today's LCDs to the bargain shelf. Whoever can mass produce affordable OLEDs will have a headstart.

Sony, for one, will recall with concern how it lost out in a similar consumer technology battle over home videotapes in the 1980s, while Toshiba's HD DVD format was later crushed by Blu-Ray.

IF THE PRICE IS RIGHT

Sony was first to market OLED TV technology in 2007, but halted production of the $2,000 home screens three years later amid a global downturn, and switched its focus to 3D. Sony limits sales of OLED screens costing as much as $26,000 to businesses that can afford the high price tag.

In January, Samsung and LG displayed prototype 55-inch OLED screens at the Consumer Electronics Show in Las Vegas. Samsung has already signaled its intent on OLEDs, saying in February it will spin off its LCD panel business.

For makers of OLED displays, which boast sharper images and do not need backlighting, the obstacle to consumer acceptance is price. You can buy 10 LCD TVs for the likely price of $10,000 for a big Samsung or LG model. That means LCD is likely to remain the dominant force in the global TV market for a while.

An executive at LG Display, a flat screen maker in which LG Electronics has a near 38 percent stake, said an internal study indicated consumers would start buying OLED TVs once the price falls to 1.3 to 1.4 times that of an LCD set.

Japan, meanwhile, has a potential rival offering - ultra high-definition sets, dubbed 4K, that boast pictures four times sharper than today's HDTV sets. Sony, Panasonic and Sharp all have this technology, but face a broadcasting infrastructure hurdle, as television stations would need to record in 4K for viewers to watch the new ultra high-definition standard.

"However, if the sets are used to view video downloaded from the Internet then higher definition could be viewed more easily," said Kazuhira Miura, an industry analyst at SMBC Nikko Securities in Tokyo, potentially giving Japan an edge in any trend for connected smart TVs.

Given that, it's too early to write off the Japanese, but they may need help to get their operations back on track.

GRAND ALLIANCE?

One option being explored is an alliance of Japan's major TV makers, brokered by the government, which would allow them to pool their R&D cash, engineering know-how and eliminate overlapping costs. Japan has already taken a step down this road, with Sony, Toshiba, and Hitachi Ltd combining their small LCD operations into Japan Display, a state-sponsored company two-thirds owned by the taxpayer.

But TVs may be a different matter.