Full color sequential image projection system incorporating puls

Details Full color sequential image projection system incorporating puls Full color sequential image projection system incorporating puls

1995-05-24

1997-09-16

Lee, Michael H.

Television

Video display

Projection device

348770, 345 84, 345148, H04N 574

Patent

active

056686110

ABSTRACT:
A system and technique for directing intensity modulated electromagnetic energy. The inventive system (10) includes an intensity modulated source of electromagnetic energy (12). Individual elements (22) in an array of energy directing elements (15) are activated in sync with the modulation of the energy source (12). In a particular implementation, the source (12) is a laser. The intensity of the laser is reduced during each successive field per frame. The energy directing elements (15), in this case, light directing elements, are implemented with an array of digital micromirrors. The light source (12) is modulated in intensity in accordance with a fixed modulation scheme. The mirrors (22) are selectively activated relative to the light source modulation scheme. Hence, the invention provides a gray scale output while allowing the time between mirror flips to be constant. This allows the system clocks to run synchronously and greatly simplifies the writing of data into the display as the time available for writing each bit is constant.

REFERENCES:
patent: 4680579 (1987-07-01), Ott
patent: 5212555 (1993-05-01), Stolz
patent: 5214420 (1993-05-01), Thompson et al.
patent: 5428408 (1995-06-01), Stanton

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