JPS6120064A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To adjust the quantity of exposure of a photosensitive body and perform various kinds of control over a copy image by providing a photosensitive body irradiating means for irradiating the photosensitive body surface with light directly. CONSTITUTION:Numbers of light emitting diodes 32 as the photosensitive body irradiating means which irradiates the photosensitive body 10 with light directly are provided in a array state between a fluorescent lamp 20 as an original irradiating means and a developing device 24 in the width direction of the photosensitive body 10. The quantity of light emission of the light emitting diodes 32 is set optionally according to the level of a current fed to the light emitting diodes 32. A control circuit 34 which controls the fed current is connected to the light emitting diodes 32 though a flexible wiring board 33. Further, a position detection plate 36 as a position detecting means which detects the position indicated on a mount surface 19 for originals 16 placed temporarily and an indication panel 41 for selecting and specifying various functions of this electrophotographic device are connected to the control circuit 34.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrophotographic apparatus using the so-called Carlson process for copying an image of a document surface onto plain paper-L, and more specifically, for specifying a position on the document surface. Accordingly, the present invention relates to an electrophotographic apparatus that can control the amount of exposure to a photoreceptor according to the specified position on the document surface, and thereby perform various processing on the 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, the photoreceptor 1o rotates in the direction of an arrow 12 during copying, and first, a uniform charge is applied to the surface by a corona discharge from a charger 14. The document surface 18 of the document 16 is irradiated with light by a fluorescent pair 20 as document irradiation means,
The reflected image is formed on the photoreceptor 1o through an imaging optical system such as an optical fiber 22 having a lens effect, and the original surface image is sequentially moved from the right end to the left end of the original surface 18 in synchronization with the rotation of the photoreceptor 10. is exposed onto the photoreceptor 1o''2. In the developing device 24, toner is attached to the photoreceptor 10 according to the charge distribution of the electrostatic latent image generated on the photoreceptor 10 by exposure of the original image, and a developed image is formed on the photoreceptor 10-1-.

This developed image is transferred onto the copy paper 11 by the transfer charger 26 to form a copy 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, 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 a single fluorescent pair 2o, and the exposure from this fluorescent pair 2o is the exposure of the reflected image from the document surface 18. , there is no irradiation means for directly irradiating the photoreceptor 1o. Therefore, although it is possible to reduce the amount of exposure of the photoreceptor 10-\, increasing the amount of exposure requires a significant increase in the amount of light emitted from the fluorescent pair 20, which is not practical.
Of course, even if you try 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 pair is used. Therefore, it was actually difficult to perform copy image control (1=copy image control).

OBJECT OF THE INVENTION The present invention eliminates the drawbacks of such conventional examples, and by specifying the position of the document, the exposure to the photoreceptor is controlled according to the specified position on the document surface, thereby achieving the above-mentioned The object of the present invention is to provide an electrophotographic apparatus that can perform various controls on copied images according to designated positions.

Structure of the Invention The present invention comprises: an original irradiating means for irradiating a document surface with light to obtain a reflected image; an imaging optical system for forming a reflected image of the document surface on a photoreceptor; has a photoreceptor irradiation means for irradiating the image, a position specifying means, and a document placement surface, and detects a position indicated by the position instruction means on the document surface placed on the document placement surface. a function specifying means for selecting and specifying a control function for the image; and a function specifying means for performing the function specified by the function specifying means in accordance with a signal of the position of the document surface detected by the position detecting means. a control means for controlling at least the operation of the photoreceptor irradiation means, and the control means causes the original irradiation means and the imaging optical system to first expose the original surface image to the photoreceptor; A second exposure of the photoreceptor is performed by the photoreceptor irradiation means, and the first exposure and the second exposure are overlapped, and the position detection means is provided with the function specifying means. This allows various types of processing to be performed on an image, and also allows for easy selection of the type of processing function.

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.
0 is surrounded by a charger 14, and a document 1 placed on a document table 26.
A fluorescent pair 2o as an original irradiating means for irradiating the original surface 18 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 10 sequentially from the right end to the left end of the document surface 18 placed on the document table 26. To go.

Similar to the conventional electrophotographic apparatus, an electrostatic latent image is formed by applying an electrostatic charge to the photoreceptor 1o and exposing the original surface image, and the developing device 24 develops toner according to the charge distribution of the electrostatic latent image. is attached, and a developed image is formed on the photoreceptor 1o'2. However, in this embodiment, the photoreceptor 1o is directly placed between the fluorescent lamp 2Q as an original 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 irradiating the photoreceptor 10 with light. The amount of light emitted by the light-emitting diode 320 can be set arbitrarily by 4 [4] depending on the amount of current supplied to the light-emitting diode 32, and the control circuit 34 for controlling the amount of current supplied is connected to the It is connected to the recording light emitting diode 32. The above control circuit 34
Further, a document 16 is placed thereon, and a position detection plate 36 is provided as a position detection means for detecting the position indicated by the placement surface 19''2 of the document 16, and various types of the electrophotographic apparatus are provided. An instruction panel 41 for selecting and specifying functions is connected. The position detection plate 36 has an indication ben 38 as a position indication means for indicating the position on the placement surface 19.
is connected. The position detection plate 36 has a coordinate origin 4.
X axis with 0 as the origin.

A rectangular coordinate system consisting of the Y axis is formed. The original 16 has one end aligned with the coordinate origin 4o, the original surface 18 facing upward, and the edge of the original aligned with the X axis.

It is placed on the position detection plate 36 along the Y 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, an example of specifying a position on the position detection plate 36 within the XY plane using the pointing pen 38 will be explained with reference to FIG. First, point 2 points A (X+,
By pressing the position detection plate 36 at the positions Yl), B (X2, Y2), the two points M,
B is input to the control circuit 34, and based on this input, a point A (X2) indicated by diagonal lines in FIG.

Y+), C(X2, Y+), B(X2
, Y2), D(X+.

Y2 ) is calculated using the rectangular area surrounded by the specified position,
Remember. On the instruction panel 41, for example, (1) the above-mentioned rectangular area ACBD is left and the other document surface images are erased. (2) Erase the document surface image corresponding to the rectangular area ACBD and leave the other parts. (2) Decrease the copy image density of the document surface image corresponding to the rectangular area ACBD. Key switches 41&, 41b, 410, etc. are provided for selecting and specifying the required image control method, such as 41&, 41b, 410, etc., and these are used to select the required image control method.

The document 16 whose position on the document surface has been specified in a double series 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.
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 document table 260 and the phase of the photoreceptor 1o match as the origin.
6, the end point of the original 16 that is aligned with the coordinate origin 4o on the position detection plate 36, the edge of the original 16 that is aligned with the X axis, and the Y axis are the f1 starting point 42, the X' axis, Y, and the edge of the original 16, respectively.
3L means that the position detection plate 36 is aligned with the axis.
It is possible to maintain consistency between the coordinates on the document table 26 and the coordinates on the document table 26, as well as the phase consistency between the starting point 42 of the document table 26F and the photoreceptor 10. Although the connection relationship is not shown in the figure, the control circuit 34 connects the light emitting diode 32 through the wiring group 43.
It also has control functions for the entire electrophotographic device.

Next, the rectangular area ACB 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 original surface 18 is sequentially illuminated on the photoreceptor 10 by the fluorescent lamp 20.
A first exposure is performed to expose a reflected image of the photoreceptor 1.
An electrostatic latent image corresponding to the original surface image is formed on the surface of the original. After that, the second exposure directly to the photoreceptor 1° is performed by the light-emitting diode 32, and the first exposure and second exposure are superimposed. Width X+X corresponding to the rectangular area ACBD on the surface
The light emitting diode provided between the two is a large rectangular area CBD.
It is controlled by the control circuit 34 so that it is turned on only during the length Y+Y2 corresponding to , with an amount of light emitted that can erase the electrostatic latent image corresponding to the document surface image written in . ” - An electrostatic latent image is formed on the document surface 18 by the drug distribution 1 exposure,
- The photoreceptor 10 from which the electrostatic latent image in the portion corresponding to the rectangular area ACBD has been erased by exposure to the second drug is developed by the developer 24 to form a developed image.

FIG. 4 is a perspective view of essential parts showing the structure of another embodiment of the electrophotographic apparatus of the present invention. In FIG. 4, the same components as in FIG. 2 are given the same numbers. In FIG. 4, the instruction panel 41 in FIG. 2 is removed, and instead a function designation area 50 is provided on the mounting surface 19 as a function designation means.
This is provided.

The function designation area 5o is printed on the mounting surface 1 for each function.
91- and allocate it to
Select and specify the desired function by instructing with . That is, it is determined which function has been selected based on the coordinates indicated by the indicator ben 38. With this configuration, the position on the document and the function selection can be specified using the same pointing pen, and excellent operability can be achieved.

Note that the function designation area 6o can also be provided with a protective sheet function for the mounting surface 19 by printing it on a separate sheet and making it removable by placing it on the mounting surface 19''.

Furthermore, even better operability can be achieved by writing on this sheet a mark for regulating the placement of the original, a grid according to the resolution of the coordinates, and the like.

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. By providing the control means, it is possible to adjust the amount of exposure to the photoreceptor according to the specified position on the document surface, and thereby perform various processing on the copied image according to the specified position. Furthermore, excellent operability can be achieved by providing a means for selecting and specifying various functions together with a position detecting means.

[Brief explanation of the drawing]

. . . Fig. 1 is a schematic front view of the main parts of a conventional electrophotographic device, and Fig. 2
The figure is a perspective view of essential parts of an electrophotographic apparatus according to an embodiment of the present invention, FIG. 3 is a plan view showing area designation on the document surface, and FIG. 4 is a main part showing the configuration of another embodiment of the present invention. FIG. 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 board, 38... instruction pen, 41... instruction panel, 41a, 41b, 4
10...Key switch, 60...Function designation area. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Diagram A

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 an image, and at least the photosensitive sensor 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. a control means for controlling the operation of the body irradiation means, and the control means causes the original irradiation means and the imaging optical system to first expose the original surface image to the photoreceptor, and the photoreceptor irradiation. performing a second exposure on the photoreceptor by means, and configured to overlap the first exposure and the second exposure;
An electrophotographic apparatus characterized in that the position detecting means is provided with the function specifying means. (2) The function specifying means is a predetermined area within the same plane as the above-mentioned placement surface, and the function specifying means is configured to select and specify the area. Electrophotographic equipment.