JPS6195374A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To execute repeatedly the 2nd exposing of the same exposure by executing the 1st exposing of a document plane image to a photosensitive body and the 2nd exposing to an assigned region by the irradiation of the photosensitive body and storing the control information for controlling a photosensitive body irradiating means. CONSTITUTION:A document 16 is once imposed on a position detecting plate 36 with a document face 18 faced upward and the position on the document face is assigned like hatched ACBD by an instructing pen 38. After a function is assigned in a function assigning region, the document with the document face 18 faced toward an imposing face is transferred onto a document plate 26. The 1st exposing on the face 18 is executed on the photosensitive body 10 by a fluorescent lamp 29 and an electrostatic latent image is formed in the stage of erasing the document plane image corresponding to the inside of, for example, the assigned rectangular region ACBD. The direct 2nd exposing to the body 10 is thereafter executed by a light emitting diode 32 and the electrostatic latent image corresponding to the rectangular region ACBD is erased. The control information for controlling the photosensitive body irradiating means is stored in a storage means 39 by which the 2nd exposing of the same exposure is repeatedly executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrophotographic apparatus that uses the so-called Carlson process to copy an image of a document surface onto plain paper, and more particularly, to , controls the amount of exposure to the photoreceptor according to this specified position on the document surface,
The present invention relates to an electrophotographic apparatus that can perform various processing on a copied image according to the specified position.

Conventional Structure and Its Problems FIG. 1 shows a schematic structure of the main parts of an example of a conventional electrophotographic apparatus using the Carlson process. In FIG. 1, photoreceptor 1o rotates in the direction of arrow 12 when copying is performed, and first, a uniform charge is applied to the surface by corona discharge from charger 14. 1st. Manuscript 16. The document surface 18 is irradiated with light by a fluorescent lamp 2o as a document irradiation means, and an optical fiber 2o having a lens effect is irradiated with light.
The reflected image is formed on the photoreceptor 10 through an imaging optical system such as No.
From the right end of 8 to the left! The original surface image □ is sequentially transferred to the photoreceptor 1.
o is exposed to light. In the developing device 24, toner is attached according to the charge distribution of the electrostatic latent image generated on the photoreceptor 1o by exposure of the original image, and a developed image is formed on the photoreceptor 10. This developed image is transferred to the copy paper 11 by the transfer charger 25.
is transferred to create a duplicate image. .

By the way, when obtaining a copy image, there is a desire to perform various processing on the image, such as adjusting the density or density, erasing a specific part of the image, or conversely leaving it.

However, in the conventional electrophotographic apparatus, the light source for exposing the photoreceptor is only a single fluorescent lamp 20, and moreover, the exposure from this fluorescent lamp 20 is the exposure of the image reflected from the document surface 18, and is not directly exposed. There is no irradiation means for irradiating the photoreceptor 10. Therefore, although it is possible to reduce the amount of exposure to the photoreceptor 1o, increasing the amount of exposure requires a significant increase in the amount of light emitted from the fluorescent lamp 20, which is not practical; Of course, even if you want to erase a specific part of the original image, it is difficult to adjust the exposure amount by dividing the area according to the specified position because a light source such as a fluorescent lamp is used. Therefore, it is difficult to actually control the copied image. ``Object of the Invention The present invention eliminates such drawbacks of the conventional example, and by specifying the position of the document, the exposure to the photoreceptor is controlled according to the specified position on the document surface. The object of the present invention is to provide an electrophotographic device capable of controlling various types of copied images according to the specified position.

Constituent structure of the invention Document irradiation means for irradiating the surface of the document with light to obtain a reflected image;
It has an imaging optical system for forming a reflected image of the original surface on a photoreceptor, a photoreceptor irradiation means for irradiating light onto the photoreceptor surface, a position specifying means, and a document placement surface. and a position detecting means for detecting a position indicated by the position indicating means on the document surface placed on the placing surface;
a function specifying means for selectively specifying a control function for the image; and at least the photoreceptor irradiating means for performing the function specified by the function specifying means in accordance with the position signal on the document surface detected by the position detecting means. control means for controlling the operation, and the control means causes the original irradiation means and the imaging optical system to first expose the original image to the photoreceptor, and the photoreceptor irradiation means to expose the original image to the photoreceptor. a storage means for storing control information for controlling the photoreceptor irradiation means; Based on the information, by repeatedly performing the second exposure with the same amount of exposure using the control means, it is possible to perform various processing on the copied image, and also to repeatedly perform the same type of processing function. It is made so that it can be used.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view of essential parts showing the structure of an embodiment of the electrophotographic apparatus of the present invention. In FIG. 2, when copying, a photoreceptor 1o rotates in the direction of an arrow 12, and a charger 14 is placed around the photoreceptor 1'O. Original irradiation means for irradiating light onto the original surface 18 of the first original 16 placed on the original table 26;
A fluorescent lamp 2.0 as a shutter and an optical fiber 22 having a lens effect as an imaging optical system are provided. The document table 26 moves in the direction of arrow 3'0 in synchronization with the rotation of the photoreceptor 10, and as a result, the image of the document surface 18 placed on the document table 26 is sequentially exposed from the right end to the left end. The body 10 is exposed to light.

Similar to the conventional electrophotographic apparatus, an electrostatic latent image is formed by imparting an electrostatic charge onto the photoreceptor 1'o and exposing the image on the document surface, and the charge of the electrostatic latent image is removed by the developing device 24. The toner is attached according to the distribution and a developed image is formed on the photoreceptor 10. In this embodiment, the photoreceptor 1o is further placed between the fluorescent lamp 2° serving as the document irradiation means and the developing device 24. A large number of light emitting diodes 32 are provided in an array along the width direction of the photoreceptor 10 as photoreceptor irradiation means for directly irradiating light. The amount of light emitted from the light emitting diode 32 can be arbitrarily set by the amount of current supplied to the light emitting diode 32, and a control circuit 34 for controlling the amount of current supplied to the light emitting diode 32 via a flexible wiring board 33. It is connected. A first original 16 is further placed on the control circuit 34, and a position detection plate 36 is used as a position detection means for detecting a specified position on the placement surface 19 of the first original 16. A function designation area 41 is provided on the position detection plate 36 for selecting and designating various functions of the electrophotographic apparatus.

An indicating ben 38 serving as a position indicating means for indicating a position on the placement surface 19 is connected to the position detecting plate 36 . The position detection plate 36 is formed with orthogonal coordinates consisting of an X-axis and a Y-axis with the coordinate origin 4o as the origin. 1st
The manuscript 16 has one end aligned with the coordinate origin 4o,
The original surface 18 is facing upward, and the edge of the original is aligned with the above X axis and Y axis.
It is placed on the position detection plate 36 along the axis. Note that the position detection plate 36. The pointing fingers 38 constitute a so-called electromagnetic induction type coordinate input device that is electromagnetically coupled to each other.

Next, an example of specifying a position on the position detecting plate 36 within the XY plane by the indicating ben 38 will be explained with reference to FIG. First, the instruction ben 38 points two points A (X, , Y,
), B (X2, Y2) fx, by pressing the position detection plate 36, the two points M and B are input to the control circuit 34, and based on this input, the points indicated by diagonal lines in FIG. point M(x2゜Y+) + C(X2
+”1) + B (X2 +”2) + D(X
l.

The rectangular area surrounded by Y2) is calculated as a specified position, and is input to the storage circuit 39 as control information 5CBD and stored. The function designation area 41 includes divided areas 411L and 41 for controlling required image controls.
b, 410, etc. are provided, and by instructing one of these with the indicator ben 38, a necessary image control function is designated. Appropriate letters, nine figures, etc. representing each function are printed on the divided area to indicate the division, position indication, etc.
and functions can be selected and specified using the same instruction bezel 38, and excellent operability can be achieved.

The first original 16, on which the position on the original surface and the function have been designated as described above, is transferred onto the original platen 26 with the original surface 18 facing the original placing surface 28.

At this time, the photoreceptor 1 of the document surface image is placed on the document placement surface 28.
During exposure to 0, an orthogonal coordinate is formed by the X' axis and the Y' axis with the starting point 42 where the phase of the original platen 26 and the phase of the photoreceptor 10 match as the origin.
The coordinate origin 4 on the position detection plate 36 for transferring the
The end point on the first original 16 that is aligned with o, the edge of the first original 16 that is aligned with the X axis, and the Y axis are the starting point 42, X
' and Y' axes, the coincidence of the coordinates on the position detection plate 36 and the coordinates on the document table 26 as well as the phase coincidence of the starting point 42 on the document table 26 and the photoreceptor 10 can be ensured. can be kept. Although the connection relationship is not shown in the figure, the control circuit 34 also has a control function for the entire electrophotographic apparatus other than the light emitting diode 32 through the wiring group 43.

Next, the rectangular area ACB specified by the above procedure
The copying operation in this embodiment will be described by taking as an example the case where the document surface image corresponding to D is to be erased.

First, the document surface 1 is sequentially illuminated on the photoreceptor 10 by the fluorescent lamp 20.
A first exposure is performed to expose the reflected image of No. 8, and an electrostatic latent image corresponding to the original surface image is formed on the photoreceptor 10. Thereafter, the light emitting diode 32 performs a second exposure directly to the photoreceptor 1o, and the first exposure and the second exposure are superimposed. Area A (width x, , x corresponding to 3BD
The light emitting diode provided between the rectangular area CHD
It is controlled by the control circuit 34 so that it is turned on only during the lengths y, , y2 corresponding to , with an amount of light emitted that can erase the electrostatic latent image corresponding to the image on the document surface. The electrostatic latent image on the document surface 18 is formed by the first exposure, and the electrostatic latent image in the portion corresponding to the rectangular area 5CBD is erased by the second exposure.The photoreceptor 1o is developed by the developing device 24. Form a visible image.

In the above example, the electrostatic latent image on the document surface 18 of the first document 16 is processed using the control information 50BD, but as shown in FIG. For example, when attempting to erase a document image of a portion of the document surface 68 of the second document 66 corresponding to the rectangular area 50BD instead of the document 160, the control circuit 34 causes the storage circuit 39 to erase the document image. By reading out the stored control information area CD and performing a copying operation similar to that described above, an electrostatic latent image on the document surface 68 is formed by the first exposure, and an electrostatic latent image is formed on the rectangular area area 68 by the second exposure. The photoreceptor 1o from which the electrostatic latent image in the portion corresponding to the CBD has been erased is developed by the developer 24 to form a developed image.

FIG. 6 shows divided areas 41 &, 41 b, 41 G in the function designation area 41 of the control function explained above.
It is an example diagram of classification notation such as. 411L is trimming in the sense of cutting out the image of the document surface; 41b is memory writing in the sense of writing control information into the memory circuit;
Reference numeral 410 is referred to as memory read in the sense of reading control information from the storage circuit. Note that 4111 is a notation for selecting, for example, trimming and specifying whether to keep or delete the image of the designated area, and 41. is a notation for ending a series of operations.

Effects of the Invention As described above, the present invention provides a photoconductor for directly irradiating the photoconductor surface with light in addition to the document irradiation means for irradiating the document surface with light to obtain a reflected image in a conventional electrophotographic apparatus. By providing an irradiation means, the amount of exposure to the photoreceptor can be adjusted, and a position detection means for detecting a specified position on the document surface and the operation of the photoreceptor irradiation means are controlled. and a storage means for storing control information for controlling the photoreceptor irradiation means, the amount of exposure to the photoreceptor is adjusted according to the specified position on the document surface, thereby achieving the specified position. Various types of processing can be applied to the copied image according to the position.

Furthermore, based on the storage information stored in the storage means,
The control means can repeatedly perform the second exposure with the same amount of exposure.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the main parts of an example of a conventional electrophotographic apparatus, FIG. 2 is a perspective view of the main parts of an embodiment of the electrophotographic apparatus of the present invention, and FIG. 3 is an area on the document surface. Plan showing designation;
FIG. 4 is a perspective view of essential parts of an embodiment of the electrophotographic apparatus of the present invention in another state, and FIG. 6 is a diagram showing an embodiment of the divisional notation. 1o...Photoreceptor, 14...Charger, 1
6...First manuscript, 20...Fluorescent light,
24...Developer, 26...Document stand, 3
2... Light emitting diode, 34... Control circuit, 36... Position detection plate, 38...
Indication pen, 39...Memory circuit, 41...
・Functional designated steel ° area, 411L, 411), 410... Association/classification area, 66... Second manuscript. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2

Claims (1)

[Claims] an original irradiating means for irradiating the original surface with light to obtain a reflected image;
It includes an imaging optical system for forming a reflected image of the original surface on a photoreceptor, a photoreceptor irradiation means for irradiating light onto the photoreceptor surface, a position indicating means, and a document placement surface. and a position detecting means for detecting a position indicated by the position indicating means on the document surface placed on the placing surface;
a function specifying means for selectively specifying a control function for the image; and at least the photoreceptor irradiating means for performing the function specified by the function specifying means in accordance with the position signal on the document surface detected by the position detecting means. a control means for controlling the operation, and the control means controls the first exposure of the original surface image to the photoreceptor by the original irradiation means and the imaging optical system, and the exposure by the photoreceptor irradiation means. a second exposure to the body;
It is configured to overlap the exposure and the second exposure, and further comprises a storage means for storing control information for controlling the photoreceptor irradiation means, and the same exposure amount is repeatedly controlled by the control means based on the control information. An electrophotographic apparatus characterized in that the second exposure is performed as described above.