JPS58156952A - Formation of image - Google Patents

Abstract

PURPOSE:To obtain not only copying of single color but also copying of multiple colors easily, by using a dielectric material and photoelectric converters thereby forming electrostatic latent images. CONSTITUTION:A photoelectric converter 1 is made into the construction wherein a transparent electrode 2 is provided on the top surface of a photoconductor layer 3, and many needle electrodes 4 are studded linearly on the bottom surface. A pair 11, 12 of the transducers 1 formed in such a way are juxtaposed on a dielectric material 5. A red filter 6 is provided on one transducer 11 and a cyan filter 7 on the other converter 12, respectively. The light 8 reflected from an original to be copied is supplied to the converters 11, 12, and the transparent electrode 2 of one converter 11 is biased negative and the other is biased positive. Electrostatic latent images are formed on the dielectric material 5 by the above-mentioned formation. Not only monochromatic copying but also polychromatic copying are thus accomplished easily by using the inexpensive dielectric material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming method for forming an electrostatic latent image on the surface of a dielectric material using a photoelectric conversion element.

The purpose of this invention is to make it possible to form an electrostatic latent image, which was conventionally formed on a photoreceptor using an electronic copying machine, by using an inexpensive dielectric material and a photoelectric conversion element instead of the photoreceptor. By providing an image forming method, not only monochrome copying but also
It should also be possible to obtain multicolor copies easily.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
Figure 1 shows this invention! Kl! In the photoelectric conversion element l used,
The photoconductor layer 3 has a structure in which a transparent electrode 2 is placed on the upper surface thereof, and a large number of needle-like electrodes 4 are placed in a straight line on the lower surface of the photoconductor layer 3.

Next, a method for forming an electrostatic latent image on the surface of the dielectric material 5 using the photoelectric conversion element 1 and obtaining a two-color overlapping image from this electrostatic latent image will be described in detail. The dielectric body 5 on which the dielectric body 5 is to be formed is in the form of a belt, a sheet, or a drum shape to be described later, and can be freely excited in the direction of arrow A by a driving means (not shown). The photoelectric conversion elements 1 are arranged in parallel with the needle-shaped electrodes #7i4 facing the dielectric 5 side. Among these photoelectric conversion elements 1, one element 1
A red filter 6 is provided on one element 1, and a red filter 6 is provided on the other element 1, and reflected light 8 from an original (not shown) to be copied passes through these filters 6.
The element 11 is adapted to receive light through each photoelectric conversion element 1s-1- through the red filter 6, and is provided with a red filter 6.
The transparent electrode 2 is negatively biased by a DC constant voltage power supply 9, and positively biased by a DC constant voltage power supply #10 of the transparent electrode 2Fi of the element 1- provided with a t*cyan filter.

On the other hand, a counter electrical fill is provided at a position opposite to each of the photoelectric conversion elements 11 with a dielectric material 5Vt in between, and these opposing electrodes 11 and photoelectric conversion elements 1□1
A static submarine is formed on the dielectric 5 between them as follows.

Now, as the dielectric body 5 moves in the direction of arrow A, the surface of the dielectric body 50 is previously charged to a positive potential by the positive charger 12 installed ``upstream of the photoelectric conversion element 1''. When image exposure is performed using the ζ filter instead of converting element 1,
The conductor layer 2 at the irradiation part of the red and white light that has passed through the red filter 6 becomes conductive and is negatively biased, allowing negative charges to flow in from the transparent electrode 2, which causes the needle-shaped electrode 4 and the counter electrode 11 to A negative discharge occurs between the dielectrics 5 and 5.
The surface of the portion corresponding to the red and white portions of the image is negatively charged, forming a charging pattern as shown in FIG. The conductor layer 3 of the white light irradiation part
becomes conductive and a positive charge flows in from the positively biased transparent electrode 2, which causes a positive discharge to occur between the needle electrode 4 and the counter electrode 11, which corresponds to the white color of the dielectric 5. The charge on the part is neutralized, and the dielectric material 5 has a state shown in FIG. 3 (AI
A charge pattern indicated by K is formed. That is, by setting the white portion to zero potential in advance, a charge pattern can be obtained in which the black portion is at a positive potential and the red portion is at a negative potential. Next, when this charge pattern is developed as shown in the third WJ(c)K using the red developing roll 13 biased to a negative potential, the dielectric material 5
Red toner is electrostatically attached only to the upper red portion, and red development is performed.

Black color fII roll 1 biased to positive potential after red color development
4, as shown in FIG. 813(d) K, the black toner is electrostatically attracted only to the black portion on the dielectric 5, and black development is performed to obtain two colors of red and black toner 4a. This toner image is transferred onto the paper in a transfer process (not shown) and then fixed on the paper in a fixing process, so that it can be copied easily.
You can do that.

In the above embodiment, t7t is a sheet-like dielectric material 5.
Although the method of forming a thief using a drum-shaped electric body 5 has been described, a drum-shaped electric body 5 may also be used, and in this case, the arrangement of each part is as shown in FIG. 114, for example. In this figure, 15 is a positive charger, 16 is a preliminary transfer corotron, 17 is a transfer corotron, 18 is a detach corotron, and 1? Fi1m-t
Corotron, and 20 is the cleaner.

Further, a conductive brush can be used for the needle-shaped electrode 4 of the photoelectric conversion element 1, and it is also possible to develop the paper K by forming a contact electrostatic flI association.

As described in detail above, this invention forms an electrostatic latent image on a dielectric material using a photoelectric conversion element, and forms a zero 11i image by amping the electrostatic latent image of the target. Something,
41IK Because it can use an inexpensive dielectric material, it is more economical than those using conventional photoreceptors, and
Since a material that is difficult to damage can be used for the dielectric, it is possible to prevent image quality from deteriorating due to damage.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a photoelectric conversion element used in an embodiment of the method of this invention, Fig. 2 is an explanatory diagram of an image forming method, and Fig. 3 (
a) to (d) are the same process diagrams, and FIG. 4 is an explanatory diagram of another embodiment. 11 and 12 are photoelectric conversion elements, 2 is a transparent electrode, 3 is a photoconductor layer, 4 is a needle electrode, 5 is a dielectric, 6 and 7 are filters Applicant: Fuji Xerox Co., Ltd. Patent attorney Tadashi Yonehara Akira Patent Attorney Todoroki Hamamoto

Claims (1)

[Claims] a first step of uniformly charging the surface of the dielectric 5; a filter 6 that transmits only a specific color to be reproduced; a transparent electrode 2; a photoconductor layer 3; and a needle electrode 4;
A second step in which the charged portion of the dielectric material 5 is imagewise exposed through the photoelectric conversion element 11 biased to the opposite polarity to the charging step in the first step.
image exposure via a photoelectric conversion element 12, which comprises a filter 7 that transmits only a specific color different from the second step, and whose transparent electrode 2 is biased with the same polarity as the charged polarity of the dielectric 5. An image forming method comprising a third step and at least one developing step of developing the electrostatic latent image formed on the dielectric 5.