Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1990-12-21
1992-01-28
Hix, L. T.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 69, 355 71, G03B 2772
Patent
active
050847279
ABSTRACT:
A technique for creating an image onto a photosensitive medium in a photoprinting process involves scanning a phototransparency for its densitometric information. Light from a lamp source is transmitted through an LCD pad onto a photosensitive medium to produce an image. The exposure of the image is regionally varied to achieve optimum results by activating individual LCD pixels to control the amount of light exposed to the photosensitive medium. A microprocessor calculates the activation pattern for the pixels based upon the densitometric information of the phototransparency.
REFERENCES:
patent: 3722998 (1973-03-01), Morse
patent: 3758207 (1973-09-01), Letzer
patent: 3926520 (1975-12-01), Kaufman
patent: 3936172 (1976-02-01), McVeigh
patent: 4180813 (1979-12-01), Yoneda
patent: 4427978 (1984-01-01), Williams
patent: 4613207 (1986-09-01), Fergason
patent: 4742346 (1988-05-01), Gillette et al.
patent: 4782348 (1988-11-01), Siegner
patent: 4783146 (1988-11-01), Stephany et al.
patent: 4809064 (1989-02-01), Amos et al.
patent: 4830468 (1989-05-01), Stephany et al.
patent: 4933754 (1990-06-01), Reed et al.
patent: 4935820 (1990-06-01), Patel et al.
Maronian Roupen H.
O'Dell Scott F.
Eastman Kodak Company
Hix L. T,.
Rutledge D.
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