Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-05-08
1988-12-06
Corbin, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
35016224, 350167, 358 62, G02B 2742, G02B 2700, H04N 931
Patent
active
047892218
ABSTRACT:
A multiple light valve (MLV) projector apparatus for producing a color display includes two separate light valves of the Schlieren dark field type. One of the light valves produces a first primary color, for example green, and the other light valve produces two other primary colors, for example red and blue. In such an apparatus the output brightness is usually limited by the red light output. An improved input (and complementary output) mask is described which optimizes the transmission of the first, second and third diffraction orders through the slots in the portion of the input mask which transmits red light. Such an optimization provides a substantial increase in red light output compared to a conventional input mask. Red transmitting slots extending in a first direction are asymmetrically disposed with respect to corresponding lenticules that extend in the first direction, while slots extending in a second direction may be symmetrically disposed with respect to corresponding lenticules that extend in the second direction. The first and second direction may be orthogonal to each other.
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6.2: High Performance Video Projector Using 2 Oil Film Light Valves by T. T. True General Electric Co., Syracuse, N.Y. distributed in Apr. 1987.
Checkovich Paul
Corbin John K.
Edmondson David J.
General Electric Company
Young Stephen A.
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