想想，你的手机可以将其中的Pic或者PPT投影到墙壁上，是多么炫！这就是所谓的Pico-projector，即皮投影仪。早就听闻了Ti的DLP(Dynamic Light Projection)技术--已在Barcelona展出，但是迟迟没有产品推出。这是一个诱人的市场，可以由于成本的原因，还没有成熟到可以推到市场。不过，那个日子一定不远了。

说起光电技术，其实化合物半导体是很重要的角色。LED，光互连，激光--甚至激光驱动器，都有化合物半导体的影子。这个市场非常庞大，科研上前途也很光明，可惜呀--难言！

Luminus Devices' experience comes from its development of “Phlatlight” photonic crystal LEDs for the dynamic light projection (DLP) technology that Texas Instruments has developed. This technology has been proven in rear-projection TVs made by Samsung, for example (see related stories), and is being pushed for use in pico-projectors.

“The problem with the DLP is the cost,” explained Brennesholtz. “TI has been working on lower-cost DLP devices and they even showed one [at the Mobile World Congress] in Barcelona, but how low is low-priced? Nobody’s quite sure.”

The most prominent exponent of lasers for pico-projection is a company called Microvision, while an Israeli company called ExPlay is combining both lasers and LEDs.