JPH0897981A - Image reading device and image writing device - Google Patents

Abstract

(57) [Summary] [Objective] The purpose is to correct the positional deviation of a plurality of CCD arrays or LED arrays by a simple operation. [Configuration] (504) to (508) are odd-numbered Cs
This is a part for specifying the reading position of the CD array. When exiting this (508), the odd-numbered C one line before
Since the output of the CD array was the maximum, the dot center was moved by one reading (one line) from the position where the dot center of the chart document 401 and the odd-numbered CCD array faced each other. One time. Even-numbered C
The CD array is controlled similarly. Therefore, (516)
In, even-numbered CCD array and odd-numbered CC
A value obtained by subtracting one line from t, which is the amount of positional deviation from the D array, is designated as the delay amount.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device capable of wide-width reading or an image writing device capable of wide-width writing.

[0002]

2. Description of the Related Art A conventional wide-width image reading device or image writing device is difficult to manufacture a long array, and it is difficult to correct dot misalignment due to bending of the long array. As disclosed in Japanese Unexamined Patent Publication No. 63-112172, it is configured by arranging a plurality of short arrays in a zigzag pattern. However, although the conventional wide-width image reading device and image writing device can correct the dot misalignment due to the bending by configuring as described above, it is possible to physically change the arrangement of the short array (such as a screw). However, it took a lot of trouble and time to correct it.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to correct the positional deviation of a plurality of CCD arrays by a simple operation.

An object of the present invention is to correct the positional deviation of a plurality of LED arrays by a simple operation.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is arranged such that dots arranged in a line in the main scanning direction and having the same intervals as the CCD elements of the CCD array are recorded. -When the chart original and the adjustment mode are designated, the chart original is read by the plurality of CCD arrays by setting the delay amount to 0, and the preceding C is read.
It is characterized by comprising control means for controlling the output of the CD array and the output of the subsequent CCD array to reset the predetermined amount to be delayed.

In order to solve the above-mentioned problems, a second aspect of the present invention is a storage means for storing a chart image, which is arranged on a line in the main scanning direction and has dots at the same intervals as the LED elements of the LED array. , When the adjustment mode is instructed, the amount of delay is set to 0, the chart image is read from the storage means and written on the transfer paper by the plurality of LED arrays, and based on the image written on the transfer paper. The control means controls the output timings of the output of the leading LED array and the output of the trailing LED array to reset the predetermined amount to be delayed.

[0007]

According to the first aspect of the present invention, a chart original arranged on a line in the main scanning direction and having dots at the same intervals as the CCD elements of the CCD array are recorded, and an adjustment mode.
Mode, the chart original is read by the plurality of CCD arrays by setting the delay amount to 0,
Since there is provided control means for controlling the output of the preceding CCD array and the output of the following CCD array so as to reset the predetermined amount to be delayed, the positional deviation of the plurality of CCD arrays is provided. Can be corrected with a simple operation.

According to the second aspect of the present invention, a storage means for storing a chart image, which is arranged on a line in the main scanning direction and has the same intervals as the LED elements of the LED array, and an adjustment mode. , The chart is read from the storage means with the delay amount set to 0 and written on the transfer paper by the plurality of LED arrays, and the preceding LED array is written based on the images written on the transfer paper. Control means for controlling to reset the predetermined amount to be delayed by measuring the output timing of the output of the LED array and the output of the following LED array.
The positional displacement of the D array can be corrected by a simple operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2 using a wide width digital copying machine in which a wide width image reading device and an image writing device are integrated.

The reading unit 100 includes a document feeding table 1
01, document discharge tray 102, conveyance roller 103, reading roller 104, platen glass 105, reading unit 10
6, an operation unit 107, and a light source 108. The reading unit 106 includes a mirror 109, a lens 110, and a photoelectric conversion unit 111. Then, the original fed from the original feeding table 101 is conveyed by the conveying roller 103 to a reading position where the reading roller 104 and the platen glass 105 face each other, and the image of the original is a mirror 109, a lens 110. The data is read in the main scanning direction (perpendicular to the paper surface) by the photoelectric conversion unit 111 via. Then, since the original document is conveyed at a constant speed as it is, the image of the original document is also read in the sub-scanning direction (left and right direction of the paper surface), which means that the entire image of the original document is read. Further, the read document is transported by the transport roller 103 and discharged to the document discharge tray 102. On the other hand, the operation unit 107 is configured as shown in FIG.
It consists of a keypad 201, a numeric keypad 202 and a liquid crystal panel 203. When a serviceman code is input to the numeric keypad 202, the reading position correction mode key 204 and the writing position correction mode key 205 are displayed on the liquid crystal panel 203. Is displayed (in the figure, the state in which the service code is input) is displayed.

The writing unit 150 includes a transfer sheet feeding table 151, a transfer sheet discharging table 152, a transport roller 153, a photoconductor 154, a charging section 155, a writing section 156, and a developing section 1.
57, a transfer unit 158, and a cleaning unit 159.
The writing unit 156 includes a light emitting unit 160 and a lens 16
It consists of 1. Then, the transfer sheet fed from the transfer sheet feeding table 151 is conveyed by the conveying roller 153 to a position where the photoconductor 154 and the transfer section 158 face each other, and
The image formed on 4 is transferred. Here, the photoconductor 1
54 is charged by the charging unit 155, is irradiated with light from the light emitting unit 160 via the lens 161, in accordance with the image data, is developed by the developing unit 157, and is photoreceptor 154.
An image corresponding to the image data is formed on the top. Then, the transfer sheet on which the image has been transferred is conveyed by the conveyance roller 153 and is ejected to the transfer sheet ejection stand 152. The control unit 180 controls each unit of the reading unit 100 and the writing unit 150.

The control circuit of the wide digital copying machine will be described with reference to FIG.

The control circuit of this wide digital copying machine is
The photoelectric conversion unit 301, the synthesizing unit 302, the image processing unit 303,
Dividing unit 304, light emitting unit 305, operating unit 306, control unit 3
07 blocks. The photoelectric conversion unit 301 is the photoelectric conversion unit 112, the light emitting unit 305 is the light emitting unit 160, the operation unit 306 is the operation unit 107, and the control unit 307 is the control unit 1.
80 respectively. Then, the image read by the photoelectric conversion unit 301 is input to the combining unit 302 as a plurality of image data, arranged as one line of image data in the combining unit 302, and in the image processing unit 303.
Various image processing is performed. One line of the plurality of image data subjected to the image processing is input to the dividing unit 304, and divided into the light emitting unit 305 and input. The light emitting unit 305 emits light according to the input image data. Control unit 306
Controls the timing of each block.

Here, the control performed by the control unit 306 in order to adjust the read position shift will be described with reference to FIGS.

The chart original 401 is a photoelectric conversion unit 301.
The image is an image in which circular dots having a diameter half the distance between the CCD elements are arranged at the CCD element intervals. The photoelectric conversion unit 301 has a plurality of staggered Cs.
It consists of a CD array, the first CCD array 402 and the second CCD array.
CCD array 403, third CCD array 404,
The odd-numbered and even-numbered CCD arrays are composed of the Nth CCD array 405. The odd-numbered CCD array precedes the even-numbered CCD array and the even-numbered CCD array follows so that the original is read out by 10 in the sub-scanning direction. Deviated by millimeter
Further, adjacent CCD arrays are arranged so that two CCD elements are overlapped at both ends in the main scanning direction, and there is a total of M overlaps in one line. The synthesizing unit 302 is provided with a plurality of 1-line memories 406 for odd-numbered CCD arrays, and odd-numbered image data output from the even-numbered CCD arrays according to an instruction from the control unit 306. The image data output from the th CCD array is delayed line by line, a gate 407 is provided, and in response to an instruction from the control unit 306,
One of the image data output from the CCD elements whose reading positions overlap is selected. The dots on the chart original 401 may be squares having sides each having a length half the distance between CCD elements.

An outline of the reading position correction mode of FIG. 5 will be described. (504) to (508) are odd-numbered Cs.
This is a part for specifying the reading position of the CD array. When exiting this (508), the odd-numbered C one line before
Since the output of the CD array was the maximum, the dot center was moved by one reading (one line) from the position where the dot center of the chart document 401 and the odd-numbered CCD array faced each other. One time. Also, (50
9) to (515) are portions that specify the reading position of the even-numbered CCD array. When passing through (515), the output of the even-numbered CCD array one line before was the maximum, and the dot center of the chart document 401 and the even-numbered CCD array faced each other. This is when the center of the dot is at a position moved by one reading (one line). Therefore, in (516), a value obtained by subtracting one line from t, which is the positional shift amount between the even-numbered CCD array and the odd-numbered CCD array, is designated as the delay amount. After this mode, the read duplication correction mode is set.

The reading position correction mode of FIG. 5 will be described in detail. First, check whether the reading position correction mode is set (50
1). In the case of the reading position correction mode, the delay amount of the synthesizing unit 302 is set to 0, all the inputs of the gate 407 are validated, and the memory, the odd number flag, and the even number flag in the control unit 306 are reset (502). Copy star key 201
It is confirmed whether or not is turned on (503). When turned on, the chart original 401 is conveyed by the conveying roller 103, and the odd-numbered CCD array is read (5
04). It is confirmed whether the read image data is larger than the image data stored in the memory (505). If it is large, the read image data is stored in the memory (50
6). The odd number flag is set (507). If not, check if the odd number flag is set (5
08). If set, t = 0 (50
9). The chart original 401 is transported by the transport roller 103, and the even-numbered CCD array is read (510). Let t = t + 1 (511). It is confirmed whether the read image data is larger than the image data stored in the memory (512). If it is large, the read image data is stored in the memory (513). The even flag is set (514). If not, it is confirmed whether the even number flag is set (515). If it is set, t = t−1 is set, and the delay amount is set to the combining unit 302 by t.
(516).

An outline of the read duplication correction mode shown in FIG. 6 will be described. The register in the operation unit 306 stores M × 2 pieces of data indicating the positions of the CCD elements whose reading positions overlap. Further, the image data having the maximum density when the chart original 401 is read is stored in the memory in the control unit 306 by the control shown in FIG.
From these things, in (603) to (604),
It is possible to obtain the image data with the maximum density of the CCD elements whose reading positions overlap. Then, (605) to (6
In 07), of the image data from the CCD elements whose reading positions overlap, the larger image data can be used as effective image data.

The read duplication correction mode of FIG. 6 will be described in detail. First, N = 0 is set (601). Let N = N + 1 (602). One set of data indicating the positions of the CCD elements whose reading positions overlap is read from the register in the control unit 306 (603). One set of image data at a position corresponding to this data is read from the memory in the control unit 306 (60
4). It is confirmed whether the image data from the odd-numbered CCD array is larger than the image data from the even-numbered CCD array (605). If it is larger, the gate 407 is instructed to validate the image data from the odd-numbered CCD array (606). If not large, even C
Gate 4 to validate the image data from the CD array
The instruction is given to 07 (607). It is confirmed whether N = M (the number of sets of data indicating the positions of CCD elements whose reading positions are duplicated) (608).

Next, with reference to FIG. 7, the control performed by the control unit 306 in order to adjust the positional deviation of writing will be described.

The light emitting section 305 is composed of a plurality of LED arrays arranged in a zigzag pattern. The first LED array 701,
Second LED array 702, Third LED array 70
3, ..., Nth LED array 704. The odd-numbered and even-numbered LED arrays are arranged such that the odd-numbered LED array precedes and the even-numbered LED array follows.
Data is written in the sub-scanning direction by 10 mm, and adjacent LED arrays are arranged so that two LED elements overlap each other in the main-scanning direction at both ends. There are × M duplicates. The separation unit 304 includes a plurality of 1-line memories 7
05 is provided for each odd-numbered LED array, and image data output from the odd-numbered LED array is output with respect to the image data output from the even-numbered LED array according to an instruction from the control unit 306. In addition to delaying the data on a line-by-line basis, a gate 706 is provided to select one of the image data output from the LED elements whose writing positions overlap in accordance with an instruction from the control unit 306. In such a configuration, in the case of the writing position correction mode, the separation unit 30 sets the delay amount of the image data output from the odd-numbered LED array for reading the linear image data to 0.
4, the output chart 707 stored in the memory of the image processing unit 303 is read from the memory. The output chart 707 is an image in which dots having the same spacing as the LED elements of the LED array and having a diameter of ½ or less of the spacing are arranged in the main scanning direction. The image of the output chart 707 is recorded on the transfer paper by the light emitting unit 305 and becomes a check chart 708. Then, the transfer paper on which the image of the check chart 708 is written is read by the photoelectric conversion unit 301, and the shift amount between the odd-numbered LED array and the even-numbered LED array is detected. The amount is set in the separation unit 304 as the delay amount. In addition, the separation unit 304 is instructed to validate the larger one of the image data output from the LED elements whose writing positions overlap.

FIG. 8 shows the positional relationship of the CCD elements and the output when the chart original 401 is read. Here, the positions of the 17th and 18th dots on the chart original 401 are the 17th and 1st positions on the 3rd CCD 404 array, respectively.
Since the positions of the 17th and 18th CCD elements of the second CCD array 403 are closer than the position of the 8th CCD element, the positions of the 17th and 1st of the second CCD array 403 are
The output of the eighth CCD element is larger than the outputs of the 17th and 18th CCD elements of the third CCD array 404 (the one-dot chain line indicates the output of the second CCD array 403, and the two-dot chain line indicates 3). The output of the th CCD array 404 is shown). Therefore, the outputs of the 17th and 18th CCD elements of the 2nd CCD array 403 become effective,
The 17th and 18th Cs of the 3rd CCD array 404
The output of the CD element becomes invalid.

In FIGS. 4, 7 and 8, one CCD array is provided with ten CCD elements for the sake of simplicity. 5000 CCD elements are provided in one CCD array.

FIG. 9 shows an embodiment in which a part of the configuration of FIG. 1 is modified. In this embodiment, the reading roller 10
4, a chart plate 901 on which the same image as that of the preceding chart original 401 is recorded, and the chart plate 901.
A drive motor 902 for driving the motor 901 is provided. Then, when the reading position correction mode is instructed from the operation unit 107, the chart plate 901 retracted outside the reading area of the reading unit 106 is rotationally driven by the drive motor 902, and the reading unit is read. It moves into the reading area 106 and faces the photoelectric conversion unit 111. After that, the control as shown in FIGS.

[0025]

According to the first aspect of the present invention, a chart original arranged on a line in the main scanning direction and having dots at the same intervals as the CCD elements of the CCD array are recorded, and an adjustment mode. , The chart original is read by the plurality of CCD arrays and the output timing of the output of the preceding CCD array and the output of the following CCD array is measured. Due to
Since the control means for controlling to reset the predetermined amount to be delayed is provided, it is possible to correct the positional deviation of the plurality of CCD arrays by a simple operation.

According to a second aspect of the present invention, a storage means for arranging on a line in the main scanning direction and storing a chart image composed of dots at the same intervals as the LED elements of the LED array, and an adjustment mode. , The chart is read from the storage means with the delay amount set to 0 and written on the transfer paper by the plurality of LED arrays, and the preceding LED array is written based on the images written on the transfer paper. Control means for controlling to reset the predetermined amount to be delayed by measuring the output timing of the output of the LED array and the output of the following LED array.
The positional displacement of the D array can be corrected by a simple operation.

[0027]

[Brief description of drawings]

FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an operation unit according to an embodiment of the present invention.

FIG. 3 is a block diagram of an embodiment of the present invention.

FIG. 4 is a schematic diagram of an embodiment of the present invention.

FIG. 5 is a flow chart of an embodiment of the present invention.

FIG. 6 is a flowchart of another embodiment of the present invention.

FIG. 7 is a detailed view of a portion of another embodiment of the present invention.

FIG. 8 is a specific schematic diagram of an embodiment of the present invention.

FIG. 9 is a configuration diagram in which a part of an embodiment of the present invention is modified.

[0028]

[Explanation of symbols]

 301 photoelectric conversion unit 302 combining unit 303 image processing unit 304 dividing unit 305 light emitting unit 306 operation unit 307 control unit

Claims (2)

[Claims] 1. A plurality of CCD arrays are arranged in a staggered pattern in the main scanning direction, and the image data output by the preceding CCD array is delayed by a predetermined amount with respect to the image data output by the following CCD array. By doing so, in the image reading device that corrects the positional deviation between the preceding and following CCD arrays and reads the original image, dots that are arranged on the line in the main scanning direction and at the same intervals as the CCD elements of the CCD array are recorded. Char
The original and the adjustment mode, the delay amount is set to 0.
As a chart, the chart original is read by the plurality of CCD arrays, and the output of the preceding CCD array and the following CCD are output.
An image reading apparatus, comprising: a control unit configured to control an output timing of an array and an output timing to reset the predetermined amount to be delayed. 2. A plurality of LED arrays are arranged in a zigzag pattern in the main scanning direction, and the image data output by the LED array following is delayed by a predetermined amount with respect to the image data output by the LED array following. By doing so, in the image writing device that corrects the positional deviation between the leading and trailing LED arrays, a chart image composed of dots arranged in a line in the main scanning direction and having the same intervals as the LED elements of the LED array is displayed. The storing means for storing and the delay amount when the adjustment mode is instructed are set to 0.
As a chart, the chart image is read from the storage means and written on the transfer paper by the plurality of LED arrays, and the output of the leading LED array and the output of the trailing LED array are output based on the image written on the transfer paper. An image writing apparatus, comprising: a control unit that controls to reset the predetermined amount of delay by measuring timing. [0001]