JPH0514680A - Image forming device - Google Patents

Abstract

PURPOSE:To properly form only a required picture by providing an operation means designating an image forming range, an area control means moving the image forming range, and a picture delete means to delete picture information to the image forming device. CONSTITUTION:A moving key on an operation panel 50 is depressed and an image forming range of an original is designated by using a ten-key or the like. Then an area control circuit 101 is processed by each element read by a picture read means to move the picture information converted into a color signal by a color signal conversion circuit 87. Attended with the movement, substantially undesired picture information (indefinite data) enters a prescribed area in the image forming area, a mask circuit 102 based on the control of a main control section 81 discriminates whether or not a picture being an object of operation at that time, for example, is within the image forming range and as to the picture corresponding to the image forming range, a color signal from the color signal conversion circuit 87 is outputted as it is and as to a picture element corresponding to the outside of the image forming range, the output of the color signal is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electronic copying machine, and more particularly to an image forming apparatus having a moving function when forming an image.

[0002]

2. Description of the Related Art In a conventional image forming apparatus such as an electronic copying machine, when an image attached to a document is moved to a position different from the original position on a copy sheet and copied, the document is placed on a platen. On the other hand, it is usual that the original itself is placed while being displaced, and the image information read by the image reading means of the image forming apparatus is not often displaced.

[0003]

Even when the image information read by the image reading means is moved and copied, unnecessary image information (undefined data) in the non-copy area is moved to the copy area by the movement. Therefore, if the image is copied as it is, unnecessary image information is also copied on the paper. In order to solve such inconvenience, the dimensions of the original reading area and the copy area must be exactly the same, and a complicated circuit for eliminating or deleting unnecessary image information is required. There is a problem that the margin of becomes small.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image forming apparatus which has a simple structure and is capable of accurately forming only an image necessary for moving an image. is there.

[0005]

SUMMARY OF THE INVENTION The present invention comprises an image reading means for reading an image attached to a document, and an image forming means for forming an image on an image forming medium based on the image information read by the image reading means. An image forming apparatus having: an operation unit for specifying an image forming range of the original;
Area control means for moving the image forming area for the image information read by the image reading means to a state corresponding to the image forming area specified by the operating means, and image information of an area other than the image forming area specified by the operating means. And an image erasing means for erasing the image.

[0006]

The operation of the image forming apparatus having the above-mentioned structure will be described below.

When the image forming range of the original is designated by the operating means in the image forming apparatus, the area control means makes the image forming area of the image information read by the image reading means in a state corresponding to the image forming range designated by the operating means. To move. At the same time, the image erasing means erases image information other than the area corresponding to the image forming range designated by the operating means. As a result, the image forming unit forms an image in the moved state corresponding to only the image forming range designated by the operating unit on the image forming medium.

[0008]

EXAMPLES Examples of the present invention will be described in detail below.

The image forming apparatus 1 shown in FIGS. 1 and 2 comprises a box-shaped apparatus body 1A, an operation panel 50 as an operating means at the upper end of the apparatus body 1A, and the apparatus body 1A. On the top of the platen is a transparent glass platen 2
An image reading unit 3 for scanning the document G set on the top and reading an image attached to the document G is provided, and an image forming unit 4 is provided below. Reference numeral 5 is a document cover provided on the document table 2 so as to be openable and closable.

The image reading means 3 corrects the optical path length at the time of zooming, the first carriage 7 on which the illumination lamp 6 as a light source is arranged, the second carriage 8 for bending the optical path by a mirror, the zoom lens 9, and the like. At the same time, the mirror unit 10 for guiding the reflected light from the original G to the photoelectric converter 11 as an image sensor, the photoelectric converter 11 for receiving the reflected light from the original G, and a drive system (not shown) for changing the positions of these parts. ).

The first carriage 7 has an illumination lamp 6 for irradiating the original G with light, a reflector 12 as a reflecting mirror for collecting the light from the illumination lamp 6 on the original surface, and a reflected light from the original G. Mirror 1 that guides to the carriage 8 side of 2
3 is installed.

On the second carriage 8, a mirror 8a for guiding the light guided by the mirror 13 to the zoom lens 9,
8b is installed.

The mirror unit 10 includes two mirrors 10.
a and 10b, and their mirrors 1 according to the change of the optical path length corresponding to the selected magnification (copy magnification).
The positions of 0a and 10b are changed, and the light from the zoom lens 9 is guided to the photoelectric converter 11 by bending the optical path with the two mirrors 10a and 10b.

The photoelectric converter 11 is mainly composed of, for example, a CCD line image sensor (CCD sensor) and the like, and photoelectrically converts reflected light from the original G to convert the image of the original G into cyan (C), Separately output as green (G), yellow (Y), (or red (R), green (G), and blue (B)) color signals. in this case,
One pixel of the document G corresponds to three continuous elements (C, G, Y) of the CCD sensor. The output of the photoelectric converter 11 is output to an A / D converter 53 described later.

The mirrors 10a and 10b and the zoom lens 9 are moved by separate stepping motors (not shown). The zoom lens 9
The spiral shaft (not shown) is rotated by the corresponding stepping motor, and the movement of this shaft causes it to move in the optical axis direction.

The image forming means 4 is provided with a platen drum 22 located at the center of the apparatus body 1A, as shown in FIG. The platen drum 22 is formed of an elastic body such as rubber around the platen drum 22.
It has a function as a platen roller for 4.
The platen drum 22 winds the paper P by rotating itself in the clockwise direction to prevent the paper P from shifting during the overlay printing.

Around the platen drum 22, pressure rollers 25 are provided at predetermined intervals to prevent the sheet from floating above the platen drum 22. The circumference of the platen drum 22 is a sheet P which is an image forming medium.
The maximum paper size is a little longer than the length in the longitudinal direction.

A thermal head 24 is arranged in the lower left portion of the platen drum 22. The thermal head 24 is attached to a radiator 24a integrally formed on the rear end surface of the holder. The ink ribbon 26 is interposed between the platen drum 22 and the thermal head 24.

A paper feed roller 41 is provided at a lower portion of the apparatus body 1A so that the paper P as an image forming medium stored in the paper feed cassette 20 can be taken out one by one. Here, the paper feed cassette 20 is detachable from the side surface of the apparatus body 1A. Paper feed roller 4
The paper P picked up in 1 is sent by the carrying roller 42 to the registration roller 21 arranged obliquely above and left of the carrying roller 42, and the leading end of the paper P is aligned. After that, the sheet P is transferred by the registration rollers 21 toward the platen drum 22 via the guides 43, and is wound around the platen drum 22 by the gripper 23 and the pressure roller 25 attached to the platen drum 22. Will be sent correctly. The paper P supplied from the manual paper feed unit 46 is also wound around the platen drum 22 in the same manner as described above.

On the other hand, the frame of the apparatus main body 1A is provided with a gripper releasing pawl 70 corresponding to a transfer portion for transferring the paper P to the platen drum 22. The gripper releasing pawl 70 is avoided by the gripper 23 when the platen drum 22 rotates clockwise, and the gripper releasing pawl 70 when the platen drum 22 rotates counterclockwise.
Engage with the gripper 23.

The paper P, the front end of which is fixed by the gripper 23, is rotated clockwise to cause the platen drum 2 to rotate.
After being wound around 2, and the front end has passed the printing area, the thermal head 24 is pressed against the platen drum 22 to perform printing.

In FIG. 1, 27 is a paper ejection guide, 28 is a paper ejection tray, and 29 is a remelting roller.

On the operation panel 50, in addition to a start button, a ten-key pad, a magnification key, a clear key, etc., a movement key 50a for designating the amount of movement of the image forming area with respect to the document G is provided.
Is provided.

Next, the main part of the control system of the image forming apparatus 1 will be described with reference to FIG.

The image forming apparatus 1 is equipped with a main controller 81 for controlling the entire system. The main control unit 81 includes an operation panel 50, a correction circuit 84, a luminance / color difference separation circuit 85,
Image quality improvement circuit 86, color signal conversion circuit 87, binarization circuit 8
8, a region control circuit 101 as a region control unit, a mask circuit 102 as an image erasing unit, a sub-control unit 82, a sub-control unit 83, and the image projection device 61, which are respectively connected to control these.

The sub control unit 82 includes a light source control unit 89, a motor control unit 90, the photoelectric conversion unit 11, and an A / D conversion unit 9.
1 and the resolution conversion unit 92, and controls these.

The light source control unit 89 controls the illumination lamp 6
It is connected to and controls the lighting and the light amount. That is, the illumination lamp 6 is turned on during normal copying.

The motor drive section 90 drives the scanning motor 18.

The sub-control unit 83 is connected to the thermal head temperature control unit 93, the thermal head 24, various detection switches 94, the drive unit 95, the cassette size detector 60a and the manual paper size detector 60b, respectively. Take control.

The drive unit 95 is connected to a drive system 96 such as a motor and a solenoid and drives the drive system 96.

The correction circuit 84 performs shading correction on the image information (after resolution conversion) obtained by A / D converting the reflected light corresponding to the original image, that is, correcting the variation of the photoelectric converter 11.

The color signal conversion circuit 87 receives the luminance signal (I) and the color difference signal 1 sent from the image quality improvement circuit 86.
(C1), the color difference signal 2 (C2), and the color signal selection signal from the main controller 81.
A color signal of any one of magenta M, cyan C, and black B, and a clock signal from an oscillator (not shown)
It is output in synchronization with the clock divided by / 3. Switching between yellow Y, magenta M, cyan C, and black B is performed by a count value obtained by counting a page synchronization signal supplied from the main controller 81 by a counter (not shown).

The area control circuit 101 reads a corresponding coordinate value from a table storing coordinates of an image forming range determined in advance according to the size and direction of the original G based on the signal of the movement amount from the movement key 50a, Corresponding to this, the color signal sent from the color signal conversion circuit 87 is moved.

The mask circuit 102 causes the image forming means 4 to move as the image information is moved by the area control circuit 101.
The masking process is performed on unnecessary image information that enters the image forming range.

The mask processing here is, for example, whether or not the pixel to be calculated at that time is in the image forming range, that is, for the pixel in the image forming range, the color signal from the color signal conversion circuit 87 is inputted. Is output as it is, and the output of the color signal is blocked for pixels outside the image forming range.

As a result, the color signal from the color signal conversion circuit 87 is directly output to the binarization circuit 88 in the case of the pixel within the image forming range described above. Conversely, if the pixel is out of the range, its output is masked. Therefore, an image outside the image forming range is not reproduced, and copying is performed in a form in which unnecessary images are excluded.

Next, the operation of the image forming apparatus 1 having the above configuration will be described with reference to FIG.

When the image of the original G is copied onto the sheet P by the image forming apparatus 1, as shown in FIG.
When moving and copying only the range from 0 to X0 to y / 2, the operator depresses the move key 50a of the operation panel 50 and designates the range in the X direction and the Y direction using the ten keys or the like. That is, the image forming range of the document G is designated.

Based on the designation of the image forming range by the operator, the area control circuit 101 reads the image information by the image reading means 3, processes the elements, and converts the image information into color signals by the color signal conversion circuit 87. Move. That is,
As shown in FIG. 4, the area control circuit 101 moves the actual image forming area of the image information by y / 2 in the Y direction. Along with this movement, unnecessary image information (indeterminate data) enters the area 0 to y / 2 in the image forming area.
Under the control of the main controller 81, the mask circuit 102 determines, for example, whether or not the pixel which is the target of the calculation at that time is in the image forming range, and the pixel corresponding to the image forming range is set to the color signal. The color signal from the conversion circuit 87 is output as it is, and the output of the color signal is blocked for the pixels corresponding to outside the image forming range.

As a result, the color signal from the color signal conversion circuit 87 is sent to the binarization circuit 88 as it is in the case of the pixel corresponding to the above-mentioned image forming range, and conversely, in the case of the pixel outside the range. Will have its output masked.
Therefore, an image outside the image forming range is not reproduced, and copying is performed in a manner in which unnecessary images are excluded.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.

[0042]

As described above, according to the present invention, because of the above-described structure, only the image of the desired area attached to the original G is moved to the image forming medium without moving the original G. An image forming apparatus capable of forming an image in a state can be provided.

[Brief description of drawings]

FIG. 1 is an external perspective view of an image forming apparatus that is an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of an image forming apparatus that is an embodiment of the present invention.

FIG. 3 is a block diagram of a control system of the image forming apparatus that is an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a moving copy by the image forming apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 1 image forming apparatus 3 image reading means 4 image forming means 50 operation panel 101 area control circuit 102 mask circuit

Claims (1)

Claim: What is claimed is: 1. An image reading unit for reading an image attached to a document, and an image forming unit for forming an image on an image forming medium based on image information read by the image reading unit. In the image forming apparatus, operation means for designating an image forming range of the original, and area control for moving an image forming area for the image information read by the image reading means to a state corresponding to the image forming range designated by the operating means. An image forming apparatus comprising: a means and an image erasing means for erasing image information in an area other than the image forming range designated by the operating means.