Image recording apparatus and image recording method
A technology of image recording and equipment, applied in the direction of fixed character spacing mechanism, printing, printing device, etc., can solve the problems of hindering the acceleration of writing operation, not taking into account the unevenness of transient response, complicated mechanism, etc.
Inactive Publication Date: 2007-04-04
DAINIPPON SCREEN MTG CO LTD
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Problems solved by technology
Although reference 2 discloses the technique of eliminating the influence of unevenness in the transient response in rising in the liquid crystal shutter using a mechanical shutter, since the light is mechanically blocked, the mechanism of the device becomes complicated and hinders the writing operation acceleration
In addition, although Patent Document 2 also discloses the technique of controlling the timing at the time of falling so as to make the exposure amount uniform, it does not take into account the unevenness of the transient response at the time of falling.
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[0046] FIG. 1 shows a structural diagram of an image recording apparatus 1 according to a first preferred embodiment of the present invention. The image recording apparatus 1 has: an optical head 10 that emits light for recording an image; and a holding drum 70 that is a holding portion for holding a recording medium 9 on an outer surface thereof. The writing operation is performed by irradiation (exposure) of light from the optical head 10 , whereby an image is recorded on the recording medium 9 . As the recording medium 9, for example, a printing plate, a film for forming a printing plate, or the like can be used. A photosensitive drum for plateless printing may be used as the holding drum 70, and in this case, it is understood that the recording medium 9 corresponds to the surface of the photosensitive drum, and the holding drum 70 holds the recording medium 9 as one.
[0047] The holding drum 70 is rotated around the central axis of the cylindrical surface of the holding...
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The invention relates to an image recording apparatus and an image recording method. In the image recording apparatus, shift times for shifting switching timings of light modulator elements are obtained so that rise times (U 1 ) after input of output start signals to driving elements connected to respective light modulator elements of a spatial light modulator and fall times (D 1 ) after input of output stop signals become a constant target rise time (U 2 ) and a constant target fall time (D 2 ). This makes it possible to suppress unevenness of the rise times and the fall times after correction of light amounts even if light modulator elements where the rise times and the fall times change by correction of light amounts are used and consequently, an image can be appropriately recorded without a complicate apparatus.
Description
technical field [0001] The present invention relates to an image recording apparatus and an image recording method for recording an image on a recording medium using a plurality of light modulation elements. Background technique [0002] A diffraction grating type light modulation element has been developed by alternately forming fixed ribbons and moving ribbons on a substrate using semiconductor device manufacturing technology, and by making the moving ribbon relative to the fixed ribbon down, to be able to change the raster depth. This diffraction grating is recommended for image recording devices in technologies such as CTP (Computer-to-Plate) as an optical exchange element because the intensity of normal reflected light and diffracted light can be changed by changing the groove depth on the diffraction grating as described above . [0003] For example, a plurality of diffraction grating type light modulation elements provided in an image recording apparatus are irradia...
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IPC IPC(8): B41J2/435B41J19/18B41J11/04B41J29/38
Inventor 森园修安田悟西垣内善行
Owner DAINIPPON SCREEN MTG CO LTD