My Favorite Game-Changing Tech Stock Has 50% Upside

There's a reason why some investors focus only on tech stocks.

It's the only sector that creates winners and losers every year -- thanks to rapid technology change -- creating an opening for investors in search of the next breakout stock. Last year's laggard can be this year's leader.

Case in point: Cisco Systems (Nasdaq: CSCO), which had lagged behind the broader tech sector for several years, but has now rallied 20% since mid-March (against the Nasdaq's 7% gain in that time). The key catalyst for Cisco: a looming set of new product launches that are expected to help invigorate growth. Analysts at Cantor Fitzgerald just boosted their target price to $31, noting that the company's "bottom in the profit cycle dovetails with a ramp in the product cycle."

Indeed, the best time to catch a tech stock when it is on the cusp of new product releases, or is on the cusp of greater adoption for its technology. And it's best to find such companies when they still represent solid value, as was the case with Cisco this past winter.

That setup is now in place for one of my favorite tech stocks for the next few years: Universal Display (Nasdaq: OLED).

The company's ticker symbol is an acronym for its core technology: organic light-emitting diodes. These aren't another flavor of LEDs that are increasingly used in light bulbs. Think of them as a better version of LCDs (liquid crystal displays). They are thinner, lighter and offer richer colors and deeper black levels.

You may have heard about OLED TV sets, but because they're still quite expensive, you might not have considered buying them. For the technology to move down the cost curve and become more competitive, a higher level of demand is needed.

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But you will soon be seeing more OLEDs pop up in smartphones, smartwatches and (the unfortunately named) phablets. The use of OLEDs will open the door to curved screens and images that appear in 3-D.

Still, Universal Display can be seen as a disappointing investment for anyone following this stock, as its shares have badly lagged the Nasdaq over the past two years. Blames goes to an unrealistic set of adoption timeframes for OLED TV sets.

Yet disappointment is relative: Universal Display has still delivered solid growth in its short history.

Equally impressive, the company's costs are fairly low (thanks to a licensing model), leading to stunning earnings before interest, taxes, depreciation, and amortization (EBITDA) margins. Such margins are also now leading to solid free cash flow.