Liquid crystal exposure device
First Claim
1. A liquid crystal exposure apparatus for exposing a photosensitive member during a relative movement thereof, comprising:
- a color light source for emitting a plurality of colored lights;
a liquid crystal shutter having a plurality of liquid crystal pixels arrayed in a direction orthogonal to the direction of said relative movement; and
a driving circuit for switching said color light source from one colored light to another, and for driving said plurality of liquid crystal pixels, wherein said plurality of liquid crystal pixels are divided into a plurality of pixel groups of N liquid crystal pixels each, said N liquid crystal pixels in each pixel group being arrayed, one displaced from another by a prescribed distance, in the direction orthogonal to the direction of said relative movement, and said driving circuit drives a plurality of liquid crystal pixels having the same displaced position in said plurality of pixel groups at a time in time-division fashion.
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Accused Products
Abstract
In a color liquid crystal exposure apparatus equipped with a liquid crystal shutter comprising a single array of liquid crystal pixels, a cost reduction is achieved by reducing the number of control ICs required to control the liquid crystal pixels in the liquid crystal shutter. The liquid crystal exposure apparatus for exposing a photosensitive member, during a relative movement thereof, comprises: a color light source for emitting a plurality of colored light beams; a liquid crystal shutter having a plurality of liquid crystal pixels arrayed in a direction orthogonal to the direction of the relative movement; and a driving circuit for switching the color light source from one color to another, and for driving the plurality of liquid crystal pixels, wherein the plurality of liquid crystal pixels are divided into a plurality of pixel groups of N liquid crystal pixels each, the N liquid crystal pixels in each pixel group being arrayed, one displaced from another by a prescribed distance, in the direction orthogonal to the direction of the relative movement, and the driving circuit drives the plurality of liquid crystal pixels in time-division fashion so that the liquid crystal pixels having the same displaced position in the plurality of pixel groups are driven at one time.
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Citations
19 Claims
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1. A liquid crystal exposure apparatus for exposing a photosensitive member during a relative movement thereof, comprising:
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a color light source for emitting a plurality of colored lights;
a liquid crystal shutter having a plurality of liquid crystal pixels arrayed in a direction orthogonal to the direction of said relative movement; and
a driving circuit for switching said color light source from one colored light to another, and for driving said plurality of liquid crystal pixels, wherein said plurality of liquid crystal pixels are divided into a plurality of pixel groups of N liquid crystal pixels each, said N liquid crystal pixels in each pixel group being arrayed, one displaced from another by a prescribed distance, in the direction orthogonal to the direction of said relative movement, and said driving circuit drives a plurality of liquid crystal pixels having the same displaced position in said plurality of pixel groups at a time in time-division fashion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification