EP0416657A2
Expired / Lapsed
EP
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Image writing device
Assignee: Sharp Corp
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Filing: 1990-09-07
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Granted: —
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Expires: 2010-09-07
Abstract
Abstract An image writing device including a beam source (15) emitting laser beam, a memory (41) for storing a plurality of frames of image data, a modulator (33) for modulating the laser beam with the image data, at least one liquid crystal cell (10), a scanner (16,17) for scanning the liquid crystal cell with the laser beam sweeping the same, a shift device (32) for shifting the liquid crystal cell in the direction orthogonal to the scanning direction, and controller (31) for reading the image data from the memory and actuating the laser beam to write the plurality of frames of images in different areas on the liquid crystal cell.
Inventors
- 👤 Yoichi Yamamoto
- 👤 Masao Narumiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:05
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/506; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G09; G09G; G09G3/00; G09G3/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
An image writing device comprising: a beam source (15) emitting laser beam; storing means (41) for storing a plurality of frames of image data; modulating means for modulating the laser beam with the image data; at least one liquid crystal cell(11, 12, 13); scanning means (16,17) for scanning said liquid crystal cell with the laser beam sweeping the same; shift means (32) for shifting said liquid crystal cell in the direction orthogonal to the scanning direction; and control means (31) for reading the image data from said storing means and actuating the laser beam to write the plurality of frames of images in different areas on said liquid crystal cell.
Claim 2
Dependent Claim
110 words
An image writing device comprising: a beam source (15) emitting laser beam; storing means (41) for storing a plurality of frames of image data; modulating means for modulating the laser beam with the image data; at least one liquid crystal cell(11, 12, 13); scanning means (16,17) for scanning said liquid crystal cell with the laser beam sweeping the same; shift means (32) for shifting said liquid crystal cell in the direction orthogonal to the scanning direction; and control means (31) for reading the image data from said storing means and actuating the laser beam to write the plurality of frames of images in different areas on said liquid crystal cell.
Claim 3
Dependent Claim
42 words
A device according to claim 1, wherein said control means sets a plurality of areas on said liquid crystal cell in the direction corresponding to a scanning line of the laser beam so as to write an image successively in the areas.
Claim 4
Dependent Claim
41 words
A device according to claim 1, wherein said control means sets a plurality of areas on said liquid crystal cell in the direction orthogonal to the scanning line of the laser beam so as to write an image in the areas.
Claim 5
Dependent Claim
27 words
A device according to claim 1, wherein the plurality of frames of image data are three-primary-color image data for composing a single frame of full color image.
Claim 6
Dependent Claim
141 words
An image writing device comprising: a beam source emitting laser beam; storing means for storing a plurality of frames of image data; modulating means for modulating the laser beam with the image data; a plurality of liquid crystal cells; scanning means for scanning said liquid crystal cells with the laser beam sweeping the same; shift means for shifting said liquid crystal cells in the direction orthogonal to the scanning direction; control means for actuating the laser beam to selevtively perform a first writing operation in which a plurality of frames of images are written in said plurality of liquid crystal cells and a second writing operation in which the plurality of frames of images are written in one of said liquid crystal cells; and instruction means for instructing said control means to choose one of said first and second writing operations.
Claim 7
Dependent Claim
141 words
An image writing device comprising: a beam source emitting laser beam; storing means for storing a plurality of frames of image data; modulating means for modulating the laser beam with the image data; a plurality of liquid crystal cells; scanning means for scanning said liquid crystal cells with the laser beam sweeping the same; shift means for shifting said liquid crystal cells in the direction orthogonal to the scanning direction; control means for actuating the laser beam to selevtively perform a first writing operation in which a plurality of frames of images are written in said plurality of liquid crystal cells and a second writing operation in which the plurality of frames of images are written in one of said liquid crystal cells; and instruction means for instructing said control means to choose one of said first and second writing operations.
Claim 8
Dependent Claim
31 words
A device according to claim 5, wherein said instruction means decides which should be chosen, said first or second writing operation, in accordance with an image density of the image data.
References Cited (Backward Citations)
No citation records indexed.
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