Split image exposure method

Details Split image exposure method Split image exposure method

1996-02-12

1998-09-01

Moses, R. L.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 32, 355 67, 349 8, G03B 2752, G03B 2732, G03B 2754

Patent

active

058018140

ABSTRACT:
A split image exposure method capable of realizing high-resolution and high-quality exposure of an image by suppressing discontinuity of density and color in junctions between split images when the original image divided into a plurality of subdivisions is exposed using a planar element. A LCD panel can be positioned at four different locations in a horizontal plane, and it receives light from a light source in respective locations and can print a transmission image onto a color printing paper through a projection lens system by exposure. A reference mark is captured based on a difference in the amounts of light received by light receiving portions of the sensor, whereby the positioning of the LCD panel can be completed. The occupancy ratio of image data representing each split image is varied in double-exposed or fourfold-exposure areas, and the density of each pixel of the liquid crystal panel is controlled in accordance with this occupancy ratio. As a result, discontinuity of color and density is reduced to almost zero.

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