Digital action, sound and computer-animated graphics have become as much a cinema staple as the dancing soft drink and fries. Yet although motion-picture production is turning digital, in most theaters, projection is still a distinctly old-fashioned analog affair. Recently, Texas Instruments developed technology to keep the movie digital all the way to the screen. In 1996, it unveiled a projector that assembles the moving image not from film but from a stream of bits. The bit stream controls an array of micromirrors inside the device that manipulate beams of colored light and turn them into moving pictures.

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