Optical: systems and elements – Projection screen – Embedded particles
Patent
1995-11-13
1999-01-26
Malley, Daniel P.
Optical: systems and elements
Projection screen
Embedded particles
359443, G03B 2156
Patent
active
058644261
ABSTRACT:
An apparatus and method for increasing perceived reflectance of the blue component in a video image to achieve a balanced, full-color image when viewed on a video projection screen. The apparatus includes a video projection screen having a plurality of blue reflective elements, interspersed in an even distribution throughout a plurality of standard white reflective elements, for modifying a reflective index of the video projection screen to decrease the gain of the red and green components of a standard video transmission, resulting in an increase in perceived reflectance of the blue component of a video image when projected on the video projection screen. The method comprises the steps of adding blue pigment to a standard white projection screen; decreasing, responsive to the blue pigment, a red-green gain; and viewing a balanced, full-color image having a perceived increase in the reflective intensity of the blue component.
REFERENCES:
patent: 3560758 (1971-02-01), Swanberg
patent: 3726583 (1973-04-01), Fujisaki et al.
patent: 3844644 (1974-10-01), Martinez
patent: 5111337 (1992-05-01), Martinez
Magma, Inc.
Malley Daniel P.
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