SU1601605A1 - Method of producing multi-colour electrographic image - Google Patents

Abstract

This invention relates to a method for producing a multi-color electrographic image. Improves image quality. Color separated rasterized electrostatic images are formed on the information carrier. Images are distinguished from each other by a raster lineature. The generated electrostatic images exhibit electrographic color illuminators. These manufacturers are differentially sensitive to the intensity of the electric field. During development, the working surface of the carrier is removed by a fixed distance from the surface of the charges of electrostatic latent images. 1 pf-ly.

Description

The invention relates to electrophotographic methods for recording information and can be used in reproducing and reproducing multi-color images, for example, in polyprography, in facsimile, equipment, as well as in outputting information in color from electronic computers.

The aim of the invention is to improve the image quality.

Figure 1 shows an electrographic device for outputting information in color from a computer; figure 2 - the structure of the output, the recording side of the faceplate recording rasteru-. common cathode ray tube (RELT); Fig. 3 shows the curves of the dependence of the intensity of the electric field E on the distance Q above the surface of the information carrier with electrostatic information.

Images of rasters of different linearity (spatial frequency) 1-10 LIN / MM, 2-20 LIN / MM, 3-25 lin / mm and 4-50 LIN / MM.

The device shown in Fig. 1 is one of the possible variants of the technical implementation of the proposed method. - In figure 1 marked; information carrier I is a dielectric film of a given thickness and for electrostatic recording (ESA) or electrophoto-semiconductor for electrophotography, corona electrode 2 for electrization of the surface of carrier I, RELT 3, clamping NOA counter electrode 4, sectionalized developing device 5, green G, red R and blue 3 developers, the developed multicolor image 6, the thermo-force device 7 for fixing the image

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unit, the RELT control unit 8 with the input for the information signal F of the image and the outputs for the control signal for the intensity 1 of the RELT beam and the control signals for its coordinates 1 and IM, the beam intensity control circuit 9 of the RELT modulator M, the unit 10 for scanning the image on the RELT screen, optical fibers 11 and 12 (for optical recording) or electroconductive p-recorders (metal-I fiber, for ESZ) insulated from each other, regularly installed in the RIFT plate, are different in diameter and pitch. Moreover, the inner-switched during the scanning by the RELT beam the ends of fibers of each size are located conjugate in local zones. RELT allows color separated rasterized electrostatic materials to be formed on a data carrier. (Images of different linearity. For example, by switching fibers 11 diameters J10 µm, they write blue with a linearity of 50 LIN / MM, with fiber 12 (and every second fiber 11 framed with fiber 12, in Fig. 2). shaded ones with a diameter of 20 µm write a red linearity of 25 LIN / MM and by switching every third fiber 12 and the fibers surrounding it 11 they write a green linearity of 10 lines / mm. In the last two cases, the intensity of the beam is increased to achieve a certain charge. The density of the carrier on the carrier spreads and merges into one homogeneous element. The thickness of the information carrier a equal to the required development distance for the required differentiation of the sensitivity of the manufacturers is determined for the selected spatial frequencies (linearity) of the rasters by the curves in FIG. H. At the same time, not only does the maximum difference in the magnitudes of the intensities strive, but also so that their absolute magnitude is sufficient for reliable retention of their particles and insufficient for retaining strangers (pain In the case of particles dispersed fractionally), the use of 1x manufacturers is used.

The device works as follows.

The carrier 1 of information of a given thickness, in its movement in the direction of the arrow, first gets uniform on its upper surface.

with Q

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positive electric charge from the corona electrode 2 (for electrophotography). Then, on the same side of the information carrier, RELT 3 is formed with the help of counter-electrode 4, an electrical potential relief, separated by rasters of reduced linearities. Further, this relief is processed in a partitioned projectile device 5, where it is consistently shown to be differentially sensitive to the intensity of the electric generator by color builders, starting with less sensitive green (G) colors, then medium sensitivity red (R) and ending with the most sensitive blue (B). Moreover, the development is carried out on the reverse side of the information carrier, which provides the necessary distance Q between the relief charges and the particles of the manufacturers. In the case of the use of particle size-separated developers, (B is the maximum dispersion, the minimum particle diameter is, for example, 10-5 µm, G is the minimum dispersion, the maximum particle diameter is 50-70 µm, and R is the average dispersion, particle diameter is 20–30 µm) the forces of attraction of particles by the potential relief of the image and their gravity are oppositely directed. This increases the differentiation of their sensitivity. The developed multi-color image 6 is fixed (if it is not necessary to transfer it to another storage medium) in a thermosilic device 7.

one .

From the curves in FIG. 3 it can be seen that with

by increasing the distance above the surface of the information carrier, the intensity of the field decreases in absolute value. Therefore, controlling the size of the distance directly proportional to the linearity of rasters and reducing this distance for particles of the largest color separation image with a linearity of 7–12 LIN / MM to zero increases the reliability of its appearance, the difference in the magnitude of the intensity of lei and, therefore, the differentiation of sensitivity of manufacturers. However, the specified distances must be rigid and stable so that their random variation in the reverse order does not

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led to a deterioration in differentiated sensitivity.

The control, setting the optimal value and stabilizing the distance between the charges of the image and the developers in the process of developing allow us to increase the required selectivity of the sensitivity of color manufacturers to color-separated images And eliminate the random, spontaneous, uncontrollable nature of the effect of its spread quality of the manifestation. The orientation of the information carrier and the fractional particles of the dispersity of the producers in the process of development, in which the force of the gesture particles and oppositely directed electric field, since it is based on this: difLe- derivations different sensitivity dispersion of the developer. Image formation with a linearity of 7–12 PIN / MIN on the surface of information carriers and the reduction of

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k

nor can its manifestations to zero allow a maximum to increase the intensity of its field and, accordingly, the difference in intensity with the other separations.

Claims (1)

Invention Formula e ni The method of obtaining a multicolor electrographic image, including the formation on the storage medium of color separations rasterized, differing from each other the linear pattern of a raster, electrostatic images, and the development of latent images by differentially sensitive electric field intensity to electric color spectroscopes, which, in order to increase the image quality, are performed on a working surface spaced a fixed distance from the surface of charges of electrostatic latent images. lfe & -f-t-4-h 1601605 77P P Phie.g 10 QjMKM