Portal de Periódicos da CAPES

<title>Laser Digital Cinema</title>

2001; SPIE; Volume: 4294; Linguagem: Inglês

10.1117/12.420785

1996-756X

Eric B. Takeuchi, Graham Flint, Robert Bergstedt, Paul J. Solone, Dicky Lee, Peter F. Moulton,

Advanced optical system design

Electronic cinema projectors are being developed that use a digital micromirror device (DMD TM ) to produce the image. Photera Technologies has developed a new architecture that produces truly digital imagery using discrete pulse trains of red, green, and blue light in combination with a DMD TM where in the number of pulses that are delivered to the screen during a given frame can be defined in a purely digital fashion. To achieve this, a pulsed RGB laser technology pioneered by Q-Peak is combined with a novel projection architecture that we refer to as Laser Digital Camera TM . This architecture provides imagery wherein, during the time interval of each frame, individual pixels on the screen receive between zero and 255 discrete pulses of each color; a circumstance which yields 24-bit color. Greater color depth, or increased frame rate is achievable by increasing the pulse rate of the laser. Additionally, in the context of multi-screen theaters, a similar architecture permits our synchronously pulsed RGB source to simultaneously power three screens in a color sequential manner; thereby providing an efficient use of photons, together with the simplifications which derive from using a single DMD TM chip in each projector.