DLP (Digital Light Processing), a low-cost leader in big-screen HDTV technology, uses a chip with thousands of micromirrors to display pictures. But there´s a limit to how small the mirrors can become and still produce a good image. Texas Instruments, which makes the DLP chips, maxed out with its 1,280-by-720 array, short of the highest-quality HD resolution of 1,920 by 1,080 pixels.