JPS6195373A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To make possible the execution of various processings to a copy image according to an assigned position by constituting a titled device in such a manner that the 1st exposing of a document plane image to a photosensitive body by a document irradiating means and imaging optical system and the 2nd exposing to the photosensitive body by a potosensitive body irradiating means are superposed. CONSTITUTION:A document 16 is imposed on a position detecting plate 36 by making one end thereof coincident with the coordinate origin 40 on the plate 36 and facing upward a document face 18 so that the ridges of the document are along coordinate axes X, Y. The operator pushes first the plate 36 in the position of the two points A, B with an instructing pen 38, then the hatched rectangular region ACBD is inputted to a position detecting circuit 35. The operator selects the corresponding switch in image control switches 41 in order to erase the document plane image corresponding to the assigned region ABCD. The electrostatic latent image corresponding to the document plane image is first formed by the 1st exposing on the photosensitive body 10 then the direct 2nd exposing to the body 10 is executed and control is so made by a control circuit 34 that the rectangular region ACBD is erased by a light emitting diode 32. The copy image is processed according to the assigned position in the above- mentioned manner.

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 designated position.

Structures of Conventional Examples and Their Problems FIG. 1 shows a schematic structure of seven main parts of conventional electrophotographic apparatuses using the Carlson process. In FIG. 1, photoreceptor 10 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. The original surface 18 of the original 16 is irradiated with light by a fluorescent lamp 2o serving as an original irradiation means, and a reflected image thereof is formed on the photoreceptor 1o through an imaging optical system such as an optical fiber 22 having a lens effect.
The original surface and the image are sequentially exposed on the photoreceptor 1o from the right end to the left end of the original surface 18 in synchronization with the rotation of the photoreceptor 1o. 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 1o. This developed image is transferred onto the photographic paper 11 by the transfer charger 26 to form a copy image.

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

However, in the conventional electrophotographic apparatus, the light source for exposing the photoreceptor is only a single fluorescent lamp 20, and the exposure from this fluorescent lamp 2o is the exposure of the reflected image from the document surface 1S. Second, there is no irradiation means for directly irradiating the photoreceptor 1o. ,
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 2o, which is of course impractical. Even if you try to erase a specific part of the original image.

Since a light source such as a fluorescent lamp is used, there are problems such as it is difficult to adjust the exposure amount by dividing the area according to the specified position, and in practice it is difficult to control the copied image. That was difficult.

OBJECTS 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, Therefore, it is an object of the present invention to provide an electrophotographic apparatus that can perform various types of control over a copied image 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 a position for generating a signal to perform the function specified by the function specifying means in accordance with a signal of a position on the document surface detected by the position detecting means. , comprising a detection control means and a control means for controlling at least the operation of the photoconductor irradiation means based on a position control signal generated by the position detection control means, and the control means controls the original irradiation means and the output. A first exposure of the original surface image to the photoreceptor by the image optical system and a second exposure of the photoreceptor to the photoreceptor by the photoreceptor irradiation means are performed, and the first exposure and the second exposure are performed.
By configuring the exposure to overlap, various types of processing can be performed on the copied image.

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, the photoreceptor 1o rotates in the direction of arrow 12, and the photoreceptor 1o rotates in the direction of arrow 12.
A charger 14 is placed around the original document 1 placed on the document table 26.
A fluorescent lamp 20 as an original irradiating means for irradiating the original surface 1B of No. 6 with light, and an optical fiber 22 having a lens effect as an imaging optical system are provided. Above document table 2
6 moves in the direction of an arrow 30 in synchronization with the rotation of the photoconductor 1o, thereby exposing the image of the document surface onto the photoconductor 1o sequentially from the right end to the left end of the document surface 18 placed on the document table 26. To go.

Similar to a conventional electrophotographic apparatus, an electrostatic latent image is formed by applying an electrostatic charge to the photoreceptor 10 and exposing the image on the document surface, and the developing device 24 develops toner according to the charge distribution of the electrostatic latent image. is attached to form a developed image on the photoreceptor 1o, but in this embodiment, the photoreceptor 10 is directly placed between a fluorescent lamp 20 serving as an original irradiation means and a 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 irradiating light. The amount of light emitted from the light emitting diode 32 can be arbitrarily set by the amount of current flowing through the light emitting diode 32, and a control circuit 34 for controlling the amount of current flowing through the light emitting diode 32 via the flexible wiring board 33 It is connected. The original 16 is placed on the position detection control circuit 36, and a position detection plate 3e is used as a position detection means for detecting a specified position on the placement surface 19 of the original 1e, and various types of the electrophotographic apparatus are used. A function designation area 41 is provided for selecting and designating the functions.

An indicating pen 38 serving as a position indicating means for indicating a position on the placement surface 19 is connected to the position detection plate 36 . The position detection plate 36 has an X axis with the coordinate origin 4o as the origin.

A rectangular coordinate system consisting of the X axis is formed. The original 16 is placed on the position detection plate 36 with one end aligned with the coordinate origin 40, the original surface 18 facing upward, and the edge of the original aligned with the X axis. The position detection plate 36 and the pointing pen 38 constitute a so-called electromagnetic induction type coordinate input device that is electromagnetically coupled to each other.

Next, the X on the position detection plate 36 is detected by the instruction pen 38! An example of specifying a position within a plane will be explained with reference to FIG. First, according to the above instruction P/38, 2 points A (X+, Y+
3. By pressing the position detection plate 36 at the position B (Xz, Y2), the two points B and B are input to the position detection control circuit 36, and based on which input the position detection plate 36 is pressed. The hatched points A(x2.Y+), C("2+!,)+B(
The rectangular area surrounded by "2w" 2LD (Xt-Y2) is calculated as the specified position, and the X-axis information is calculated using its size, and the X-axis information is calculated using the rectangular area surrounded by the above and other areas. The information of the boundary part is memorized.

On the instruction panel 41, for example, (1) the above-mentioned rectangular area MCD is left and the other document surface images are erased. ■
The document surface image corresponding to the rectangular area 5CBD is erased, and the other parts are left. (2) Decrease the copy image density of the original surface image corresponding to the rectangular area OBD. A key switch 41 for selecting and specifying a desired image control method such as
a, 41b.

41a etc. are provided, and the necessary image control method can be selected from these.

The document 16 whose position on the document surface has been designated as described above is transferred onto the document table 26 with the document surface 18 facing the document placement surface 28 .

At this time, the photoreceptor 1 of the document surface image is placed on the document placement surface 28.
When exposing the original 16 to the original 16, an orthogonal coordinate is formed by the X-axis and the X-axis with the starting point 42 where the phase of the original platen 26 and the phase of the photoconductor 10 match as the origin. By aligning the end point on the document 16 that is aligned with the coordinate origin 4o on the position detection plate 36, the X axis, and the edge of the document 1e that is aligned with the X axis, respectively, with the starting point 42, the i axis, and the Y' axis. , it is possible to maintain consistency between the coordinates on the position detection plate 36 and the coordinates on the document table 26, as well as the phase consistency between the starting point 42 on the document table 26 and the photoreceptor 1o. Although the connection relationship is not shown in the figure, the control circuit 34 has a control function for the entire electrophotographic apparatus other than the light emitting diode 32 through the wiring group 43.

Next, the rectangular overhead AOB specified by the above procedure
The copying operation in this embodiment will be explained by taking as an example the case where the document surface image corresponding to D is to be erased. First, the fluorescent lamp 20 sequentially illuminates the document surface 18 on the photoreceptor 1o.
A first exposure is performed to expose a reflected image of the photoreceptor 1.
An electrostatic latent image corresponding to the document surface image is formed on the document surface. Thereafter, the light emitting diode 32 illuminates the photoreceptor 1.
A direct second exposure is carried out to o, and the first exposure and second exposure are superimposed. In the second exposure, the width corresponding to the rectangular area MCD on the document surface! , , !
The light emitting diode provided between the rectangular area 50 BD
At the starting end Y1 of the length corresponding to , the control circuit 34 controls the light to be turned on with an amount of light that can erase the electrostatic latent image corresponding to the image on the document surface, and corresponds to the rectangular area OBD. The control circuit 34 controls the light emitting diodes 32 so that they are all turned off at the end of the length Y2. 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 M CBD is erased by the second exposure. It is developed to form a visible image.

Note that in the above example, the portion corresponding to the rectangular area OBD is erased, but conversely, when erasing an area other than this portion, it is sufficient to simply reverse the lighting and extinguishing of the light emitting diode 320. Furthermore, it is clear that even if the rectangle is not only a simple rectangle as shown in FIG. 3 but also has complex irregularities, it is possible to specify the area by indicating all the vertices with the indicating pen 38. .

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. Equipped with an irradiation means, it is possible to adjust the amount of exposure to the photoreceptor, a position detection means for detecting a specified position on the document surface, and a function for selecting and specifying a control function for the image. a specifying means; a position detection control means for generating a signal to perform a function specified by the function specifying means according to a signal of a position on the document surface detected by the position detecting means; and control means for controlling at least the operation of the photoreceptor irradiation means based on the generated position control signal, and the control means controls the image of the document surface by the original irradiation means and the imaging optical system. By configuring the structure so that the first exposure to the photoreceptor and the second exposure to the photoreceptor by the photoreceptor irradiation means are overlapped, various types of processing can be performed on the copied image according to the specified position. can be applied.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of essential parts showing one row of conventional electrophotographic devices, FIG. 2 is a perspective view of essential parts of an embodiment of the electrophotographic device of the present invention, and FIGS. FIG. 3 is a plan view showing designation. 10... Photoreceptor, 14... Charger, 1
6... Manuscript, 20... Fluorescent light, 24.
...Developer, 26...Document stand, 32...
... Light emitting diode, 34 ... Control circuit,
36...Position detection control circuit, 36...
Position detection plate, 38... Indication pen, 41...
・Function specification area, 41 a + 4 l b + 4
1 c......Segmented area. Name of agent: Patent attorney Toshio Nakao and one other person I1
Figure and,)

Claims (2)

[Claims] (1) An original irradiating means for irradiating the original surface with light to obtain a reflected image, an imaging optical system for forming the reflected image of the original surface on a photoreceptor, and irradiating light onto the photoreceptor surface. a photoreceptor irradiation means for irradiation, a position indicating means, and a document placement surface, and a position for detecting a position indicated by the position instruction means on the document surface placed on the document placement surface. a detecting means, a function specifying means for selectively specifying a control function for the image, and a signal for performing a function specified by the function specifying means according to a signal of a position on the document surface detected by the position detecting means. and a control means for controlling at least the operation of the photoconductor irradiation means based on the position control signal generated by the position detection control means, and the control means controls the operation of the document irradiation means. and a first exposure of the original surface image onto the photoreceptor by the imaging optical system and a second exposure of the photoreceptor by the photoreceptor irradiation means, so that the first exposure and the second exposure are overlapped. An electrophotographic device characterized by comprising: (2) The position control signal is information on the function specified by the function specifying means, and the area surrounded by the signals at the plurality of positions on the document surface detected by the position detecting means and other areas. An electrophotographic apparatus according to claim 1, characterized in that the information is composed of information on boundary portions of regions.