JP2001183760A - Picture reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture reader which easily coordinate a read object to a read area. SOLUTION: A main scanning LED array 6 and a subscanning LED array 7 which display the read area are provided around an original platen glass 2. When the read area is set by main scanning position moving keys 8a and 8b, subscanning position moving keys 9a and 9b, or the like, lighting areas of the main scanning LED array 6 and subscanning LED array 7 are changed in coordination with this read area to always display the correct read area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for optically reading an image.

[0002]

2. Description of the Related Art In recent years, documents such as presentation materials have been created by pasting and editing color images and photographs by enlarging or reducing the images using a computer. Is used. In addition, a copying machine for reading and printing an image of a document such as a created presentation material, that is, for copying the document, is widely used.

An image scanner has an enlargement / reduction function for reading at various resolutions, and a copying machine has an enlargement / reduction function for copying in various sizes.

In an image scanner apparatus, it is necessary to pay attention to how to place a document and an enlargement / reduction ratio according to the size of the object to be read and the location in the document where the object to be read is described. Further, in a copying machine, it is necessary to pay attention to how to place a document and enlarge / reduce magnification according to a document size, a copy position where copying is performed, a print position of an output sheet, and the like.

A method of placing a document and setting of an enlargement / reduction ratio in a conventional image reading apparatus such as an image scanner or a copying machine will be described with reference to FIGS.

FIG. 10 is a view for explaining how to place a document in a conventional image reading apparatus, FIG. 11 is a view for explaining how to place a document in a conventional image reading apparatus, and FIG. FIG. 13 is a flowchart for explaining an enlarged copy of a portion, and FIG. 13 is a flowchart showing a procedure for performing an enlarged copy of a portion to be read by a conventional image reading apparatus.

For example, in the case of a copying machine capable of copying an original up to A3 in size, if an A4 size original is to be copied, the original should be placed horizontally as shown in FIG. ), There are two ways of placing vertically. In addition, as shown in FIG.
There are two types of position alignment methods, namely, a method of adjusting the copy position where the centers of the ten positions are aligned. In the case of vertical placement and original edge alignment, the original 110 of the original 110 is aligned with the edge of the original glass 100 as shown in FIG. A display plate 101 having an opposite document end provided around a document glass 100,
It is adjusted to the scale marked "A4" at 102.

Next, a method of enlarging and copying a part of a document to the center of an output sheet in a conventional copying machine will be described. FIG. 12 shows an example in which a part of a document is enlarged and copied by a conventional copying machine. FIG. 13 is a flowchart showing the procedure of the enlarged copy shown in FIG.

In order to enlarge the mark 111 described on a part of the original 110 shown in FIG. 12A and to copy the mark 113 to the full output sheet 112 shown in FIG.
First, the user measures the vertical length and the horizontal length of the mark 111 of the document 110 with a ruler (S21).

Next, the user calculates the enlargement magnification for the vertical and horizontal directions from the vertical and horizontal lengths of the mark 111 and the size of the output sheet 112 (S22). The smaller one of the calculated vertical magnification and horizontal magnification is determined as the magnification in this copy (S2).
3).

Then, as shown in FIG. 12C, the original 110 is placed upside down so that the surface of the mark 111 of the original 110 is in contact with the original glass 100. At this time, positioning is performed while assuming a reading range so that the mark 111 is arranged near the end of the original glass 100 (S24). After the alignment of the document 110 is completed, copying is performed (S
25).

[0012]

In the conventional image reading apparatus, as shown in FIG. 10A, when the original 110 is placed on the original
The document 110 is placed horizontally with the edge of the document 10 aligned with the edge of the document glass 100 and the other edge of the document 110 aligned with a predetermined mark position in the memories 101 and 102. However, when the reading area is set, the reading area is erroneously set as shown in FIG.
If it is set vertically as shown in (b), a part of the copy object that must be copied cannot be copied. In such a case, the reading area must be set again and the copy must be performed again. Will not be.

In the case of enlarging copy, S22 in FIG.
If the calculation performed in step is incorrect, or if the positioning is not performed properly in step S24,
As shown in (d), a problem such as a part of the mark 113 of the output sheet 112 being missing occurs.

In particular, when the original 110 placed on the original glass 100 is read through the original glass 100, the position of the original 110 must be adjusted so that the reading side of the original 110 faces the original glass 100. Therefore, it is difficult to confirm whether the object to be copied matches the reading position of the copying machine. In addition, when copying only a part of the original and not copying the other part, it is necessary to cover it with blank paper so that the part that is not copied is not read.
It is difficult to identify the position of the blindfold.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image reading apparatus capable of easily adjusting an object to be read to a reading area.

[0016]

According to a first aspect of the present invention, there is provided an image reading apparatus, comprising: a reading area setting means for setting a reading area for reading an image; and a display corresponding to the setting of the reading area setting means. Reading area display means for indicating the set reading area by changing the read area.

In the image reading apparatus according to the first aspect of the present invention, the reading area set by the reading area setting means is displayed by the reading area display means. As a result, the reading area set arbitrarily can be known from the reading area display means, and it is difficult to misplace the reading area, and it is easy to match the reading target with the reading area.

An image reading apparatus according to a second aspect of the present invention is the image reading apparatus according to the first aspect, further comprising a document glass on which a document to be read is placed. The area display means is
It is arranged around the original glass.

In this case, the position of the original can be easily adjusted by comparing the original placed on the original glass with the reading area display means around the original glass.

According to a third aspect of the present invention, in the image reading device according to the first or second aspect of the present invention, the reading area setting means includes a reading position for setting an image reading position. The reading area display means includes setting means, and the reading area display means includes reading position display means for indicating the set reading position by changing the display in accordance with the setting of the reading position setting means.

In this case, the reading position set by the reading position setting means is displayed by the reading position display means. As a result, the reading position set arbitrarily can always be correctly known from the reading position display means, and the alignment of the reading target is facilitated.

According to a fourth aspect of the present invention, in the image reading apparatus according to any one of the first to third aspects of the present invention, the reading area setting means includes:
A reading range setting unit for setting an image reading range, wherein the reading range setting unit changes a display in accordance with the setting of the reading range setting unit,
It includes reading range display means for indicating the set reading range.

In this case, the reading range set by the reading range setting means is displayed by the reading range display means. Thereby, the reading range set arbitrarily can always be correctly known from the reading range display means, and it becomes easy to include the reading target in the reading range.

According to a fifth aspect of the present invention, in the image reading apparatus according to the first aspect of the present invention, the reading area display means includes a reading area set by the reading area setting means when the reading area is set. And irradiation means for irradiating the light with light.

In this case, whether or not the object to be read is included in the read area depends on whether or not the object to be read such as the written portion of the original placed in the area to be read overlaps with the part illuminated by the light from the irradiating means. Can be determined, and it becomes easy to match the reading target with the reading area.

According to a sixth aspect of the present invention, in the image reading device according to the fifth aspect of the present invention, there is provided a line sensor for reading an image while moving the reading line in a direction perpendicular to the reading line. Moving means for moving a location irradiated by the irradiating means along the moving direction of the reading line of the line sensor according to the setting of the image reading area.

In this case, the position irradiated by the irradiating means is moved in the same manner as the movement of the reading line of the line sensor, so that the area read by the line sensor can be illuminated by the light irradiated from the irradiating means. Accuracy when matching the target to the reading area is improved.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an image reading apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing the structure of an image reading apparatus according to an embodiment of the present invention. An image reading apparatus main body 1 shown in FIG. 1 includes a document glass 2, a document cover 3, an LCD (liquid crystal display) touch panel 4, a numeric keypad 5, a main scanning LED (light emitting diode) array 6, a sub-scanning LED (light emitting diode) array 7, Main scanning position moving keys 8a, 8b, sub scanning position moving keys 9a, 9b, main scanning range designating keys 10a, 10b, main scanning range toggle key 11, sub scanning range designating keys 12a, 12b, sub scanning range toggle key 13, and carriage movement. Key 14a, 1
4b.

The document glass 2 is rectangular, and the length of the short side is longer than the horizontal length of the A3 size document, and the length of the long side is longer than the vertical length of the A3 size document. An original is placed on the original glass 2 face down in order to read the original. The document cover 3 is provided so as to be openable and closable for fixing a document placed on the document glass 2, and blocks external light transmitted through a portion of the document glass 2 that is not covered by the document.

The LCD touch panel 4 is used to set reading conditions such as the number of copies, density adjustment, reading magnification and color. The ten keys 5 are used to input the number of copies and other numerical values of the reading conditions selected by the LCD touch panel 4.

The main scanning LED array 6 is provided along the short side of the original glass 2 and displays a reading position and a range in the main scanning direction. The sub-scanning LED array 7 is provided along the long side of the original glass 2 and displays a reading position and a range in the sub-scanning direction.

The main scanning position moving keys 8a and 8b are used to move the reading position in the main scanning direction. The main scanning position moving keys 8a and 8b correspond to the forward and reverse directions of the main scanning direction, respectively.
Is pressed, the entire LED lighting portion for displaying the reading area of the main scanning LED array 6 moves in the main scanning direction in the forward direction, and when the main scanning position moving key 8b is pressed, the main scanning LED 8 is pressed.
The entire LED lighting portion of the array 6 moves in the direction opposite to the main scanning direction.

The sub-scanning position moving keys 9a and 9b are used to move the reading position in the sub-scanning direction. The sub-scanning position moving keys 9a and 9b correspond to the forward and reverse directions of the sub-scanning direction, respectively.
Is pressed, the entire LED lighting portion representing the reading area of the sub-scanning LED array 7 moves in the forward direction of the sub-scanning direction,
When the sub-scanning position moving key 9b is pressed, the entire LED lighting portion moves in the direction opposite to the sub-scanning direction.

The main scanning range designation keys 10a and 10b are used to designate a reading range in the main scanning direction. The main scanning range designating keys 10a and 10b correspond to the forward direction and the reverse direction of the main scanning direction, respectively. When the main scanning range designating key 10a is pressed, the end of the LED lighting portion representing the main scanning range becomes the main scanning direction. It moves in the forward direction, and moves in the reverse direction when the main scanning range designation key 10b is pressed. The enlargement / reduction can be set by changing the width of the LED lighting portion for displaying the reading area of the main scanning LED array 6 using the main scanning range designation keys 10a and 10b. The main scanning range toggle key 11 is a main scanning range designating key 10a, 1
0b designates which one of both ends of the LED lighting portion of the main scanning LED array 6 is to be changed.

The sub-scanning range specification keys 12a and 12b are used to specify a reading range in the sub-scanning direction.
The sub-scanning range designating keys 12a and 12b correspond to the forward and reverse directions of the sub-scanning direction, respectively. When the sub-scanning range designating key 12a is pressed, the end of the LED lighting portion representing the sub-scanning range is set in the sub-scanning direction. It moves in the forward direction, and moves in the reverse direction when the sub-scanning range designation key 12b is pressed. The enlargement / reduction can be designated by changing the range of the LED lighting portion for displaying the reading area of the sub-scanning LED array 7 using the sub-scanning range designation keys 12a and 12b. The sub-scanning range toggle key 13 is
L of the sub-scanning LED array 7 designated by a and 12b
It is used to select which of the two ends of the ED lighting portion is to be changed.

The carriage movement keys 14a and 14b are used to turn on a light source lamp of the carriage, which will be described later, and to move the carriage to an arbitrary sub-scanning position when reading is set. The carriage movement keys 14a and 14b
When the carriage movement key 14a is pressed, the carriage moves in the sub-scanning direction, and when the carriage movement key 14b is pressed, the carriage moves in the direction opposite to the sub-scanning direction. Moving.

FIG. 2 is a sectional view showing a carriage driving mechanism of the image reading apparatus of FIG. Inside the image reading apparatus main body 1 shown in FIG.
6, shaft 17, DC motor 18, drive pulley 19,
A driven pulley 20, a driving wire 21, a driven pulley support member 22, and an urging means 23 are provided.

The carriage 15 carries a sensor for reading a document. The configuration inside the carriage 15 will be described later. The support member 16 is mounted on the carriage 15 to support the carriage 15, and is slidably supported by a shaft 17 described later by a built-in bearing or the like. The shaft 17 is fixed across the both sides of the image reading apparatus main body 1 in the sub-scanning direction.
The movement of the carriage 15 in the sub-scanning direction is restricted by the shaft 17.

The DC (direct current) motor 18 is
To generate a driving force to drive the motor. The drive pulley 19 is disposed on one side of the image reading apparatus main body 1 in the sub-scanning direction, is fitted on the rotation axis of the DC motor 18, and rotates with the rotation axis of the DC motor 18. The driven pulley 20 is provided on the other side of the image reading device main body 1 in the sub-scanning direction, opposite to the driving pulley 19. Drive wire 21
Is stretched between a driving pulley 19 and a driven pulley 20 and is coupled to the carriage 15. Drive wire 21
Converts the rotational movement of the drive pulley 19 into a linear movement in the sub-scanning direction and transmits the linear movement to the carriage 15.

The driven pulley support member 22 is
Are movably supported in the sub-scanning direction. The urging means 23
One end is connected to the side surface of the other side of the image reading apparatus main body 1, and the other end is connected to the driven pulley support member 22, which is used to generate tension of the drive wire 21.

FIG. 3 is a conceptual diagram showing the configuration inside the carriage of the image reading apparatus of FIG. Inside the carriage 15, a light source lamp 24, an aperture 25, a reflection mirror 26, a color image sensor 27, and an imaging lens 28 are provided.
Is provided.

The light source lamp 24 irradiates a document placed on the document glass 2 with light. The aperture 25 limits the light reflected by the light emitted from the light source lamp 24 upon irradiating the original placed on the original glass 2, and narrows the line width in the sub-scanning direction that is read by the color image sensor 27 described later.

The reflecting mirror 26 guides the reflected light passing through the aperture 25 to an image forming lens 28 described later. The imaging lens 28 forms an image on a color image sensor 27 described later by the light reflected by the reflection mirror 26. The color image sensor 27 converts the image formed thereon into an electric signal. The color image sensor 27 outputs three types of output signals corresponding to, for example, red, green, and blue images.

FIG. 4 is a block diagram showing a configuration of an electric system of the image reading apparatus of FIG.

The control of the electric system of the image reading apparatus main body 1 shown in FIG. 4 is performed by a CPU (central processing unit) 39. The CPU 39 controls the color image sensor 2
7, control of the operation of the DC motor 18, on / off control of the light source lamp 24, and control of lighting of the main scanning LED array 6 and the sub-scanning LED array 7.
The CPU 39 temporarily stores a calculation result and the like for control in the work memory 40.

First, a configuration related to signal processing of the color image sensor 27 will be described. The image sensor driving circuit 36 supplies a line synchronization signal 37 generated for each sub-scanning line to the color image sensor 27 and a pixel clock 3 generated for each pixel in the main scanning direction.
8 is generated and output. The three amplifiers 29 amplify the three types of output signals output from the color image sensor 27, respectively. The three A / D (analog / digital) converters 30 convert the analog signals amplified and output by the three amplifiers 29 into digital signals, respectively. The three shading correction circuits 31 apply respective digital signals output from the three A / D converters 30 to the respective digital signals.
If the document has a uniform density, normalization correction is performed so that a uniform output can be obtained.

The buffer memory 32 stores all digital signals output from the three shading correction circuits 31. The buffer counter 35 increases the count value by the number of data written from the shading correction circuit 31 to the buffer memory 32, and when the data is transferred from the buffer memory 32 to an external host computer (not shown), the count value is increased by the number of data. Decrease.

A DMA (direct storage access) controller 33 transfers data stored in the buffer memory 32 to an external host computer (not shown) or a printer controller (not shown) directly at high speed without the intervention of the CPU 39. Control. An interface (I / F) controller 34 controls data transfer between the image reading apparatus main body 1 and an external host computer (not shown).

Next, a configuration used for inputting various data to the CPU 39 will be described. The parallel-serial conversion circuit 48 includes main scanning position moving keys 8a and 8b, sub-scanning position moving keys 9a and 9b, and a main scanning range designating key 10
a, 10b, the main scanning range toggle key 11, the sub scanning range designating keys 12a, 12b, the sub scanning range toggle key 13, and the signals output in parallel from the carriage moving keys 14a, 14b in the sub scanning direction are converted into serial data. Output to CPU39.

The LCD driver 44 drives the LCD touch panel 4 to give each setting of reading conditions and the like input by using the LCD touch panel 4 to the CPU 39, and displays information given from the CPU 39 on the LCD touch panel 4.

Parallel / serial conversion circuit 45 for numeric keypad
Converts the parallel data input by the numeric keypad 5 into serial data and supplies the serial data to the CPU 39. Therefore, the numeric keypad parallel-serial conversion circuit 45 causes the CPU 39 to generate an interrupt.

Next, a configuration used for controlling the main scanning LED array 6 and the sub-scanning LED array 7 by the CPU 39 will be described. Serial / parallel conversion circuit 47
Outputs the serial data output from the CPU 39 as a lighting instruction in parallel in units of LEDs. LE
The D driver 46 is an LED designated based on the parallel data output from the serial / parallel conversion circuit 47.
The main-scanning LED array 6 and the sub-scanning LED array 7 are driven so that only the LED is turned on.

Next, a configuration used for controlling the light source lamp 24 will be described. The power supply circuit 24a includes a CPU 39
The light source lamp 24 is turned on in response to the instruction from. When movement of the carriage 15 is instructed by the carriage movement keys 14a and 14b, an instruction from the CPU 39 is given to the power supply circuit 24a via the parallel-serial conversion circuit 48, and the light source lamp 24 is turned on. For example, a mode called “confirmation scan” is provided, and by selecting this mode with the LCD touch panel 4, an instruction to turn on the light source lamp 24 is output from the CPU 39 to the power supply circuit 24 a.

Next, a configuration used for controlling the DC motor 18 by the CPU 39 will be described. The D / A (digital / analog) converter 41 outputs an analog signal based on the digital data output from the CPU 39. The motor driver 42 controls the DC motor 18 based on the current value of the analog signal of the D / A converter 41. That is, the rotation direction and the rotation speed of the DC motor 18 change according to the analog signal of the D / A converter 41.

In this embodiment, the main scanning position moving keys 8a and 8b, the sub scanning position moving keys 9a and 9b, the main scanning range designating keys 10a and 10b, the main scanning range toggle key 11, the sub scanning range designating key 12a, 12b and the sub-scanning range toggle key 13 constitute reading area designating means;
The main scanning position moving keys 8a and 8b and the sub-scanning position moving keys 9a and 9b constitute reading position specifying means, and the main scanning range specifying keys 10a and 10b and the main scanning range toggle key 1
1. The sub-scanning range designating keys 12a and 12b and the sub-scanning range toggle key 13 constitute reading range designating means, and the main scanning LED array 6 and the sub-scanning LED array 7 comprise reading area display means, reading position display means and reading range display. The light source lamp 24 corresponds to irradiation means, and the DC motor 18 corresponds to moving means.

FIG. 5 is a diagram for explaining enlarged copying of a portion to be read in the embodiment of the present invention.

Hereinafter, as shown in FIG. 5A, the mark 50 described on the original 50 is placed on the original glass 2 as shown in FIG. The case where the output sheet 52 on which the enlarged mark 53 shown in FIG. 5C is described will be described.

As a method of setting a magnification at the time of enlargement copying, a method of inputting a magnification by setting a reading magnification of the LCD touch panel 4 as in the related art, and operating the main scanning range designating keys 10a and 10b and the sub-scanning range designating keys 12a and 12b. There are two methods: a method of automatically setting the magnification by calculation of the CPU 39 by determining the reading range by using the method.

FIG. 6 is a flowchart showing an example of a procedure for making an enlarged copy of a portion to be read.

First, in order to prevent the original 50 from being read obliquely, the original 50 is placed on the original glass 2 along the edge of the original glass 2 as shown in FIG.
1).

Main scanning LED array 6 and sub scanning LED
The reading magnification is set by the magnification setting of the LCD touch panel 4 so that the width of the lit portion of the array 7 is larger than the width of the mark 51 which is the reading target portion (S2). In this case, the magnification is set from 300% to 2 while observing the lighting portions of the main scanning LED array 6 and the sub scanning LED array 7.
It is performed while confirming that the mark 51 of the reading target portion is almost in the LED lighting portion, such as 80% → 290%. In this case, place the document 50 facing up and mark 5
1 is set so that the original 50 is visible.
May be turned over.

At this time, in the electric system shown in FIG.
The set magnification input on the D touch panel 4 is provided to the CPU 39 via the LCD driver 44. CPU39
The serial-to-parallel conversion circuit 4 according to the set magnification
A lighting range is instructed to the LED driver 46 via 7,
The main scanning LED array 6 and the sub scanning LE in the lighting range
The D array 7 is driven by the LED driver 46.

After setting the magnification in this way, the main scanning position moving keys 8 corresponding to the forward and reverse directions of the main scanning direction are set.
The lit portion of the main scanning LED array 6 is moved to the mark 51 as a reading target position at a and 8b (S3).

At this time, in the electric system shown in FIG. 4, a movement instruction by the main scanning position movement keys 8a and 8b is given to the CPU 39 via the parallel-serial conversion circuit 48. The LED driver 46 is transmitted by the CPU 39 via the serial / parallel conversion circuit 47 in response to the main scanning position moving instruction.
, A signal instructing the movement of the lighting portion of the main scanning LED array 6 is output. According to the signal, the LED driver 4
The entire lighting portion of the main scanning LED array 6 driven by 6 moves.

Next, the lit portion of the sub-scanning LED array 7 is moved to the position to be read by the sub-scanning position moving keys 9a and 9b corresponding to the forward and reverse sub-scanning directions (S4).

At this time, in the electric system shown in FIG. 4, an instruction to move by the sub-scanning position moving keys 9a and 9b is given to the CPU 39 via the parallel / serial conversion circuit 48. In response to the sub-scanning position movement instruction, the CPU 39 controls the LED driver 46 via the serial / parallel conversion circuit 47.
, A signal instructing the movement of the lighting portion of the sub-scanning LED array 7 is output, and the entire lighting portion of the sub-scanning LED array 7 driven by the LED driver 46 moves in accordance with the signal.

At this point, it is again confirmed that both the main scanning LED array 6 and the sub-scanning LED array 7 include a portion to be read.
The magnification is set on the touch panel 4.

After that, the "confirmation scan" mode is selected on the LCD touch panel 4, and the carriage movement keys 14a and 14b corresponding to the forward and reverse sub-scanning directions are operated, and the carriage 15 is turned on with the light source lamp 24 turned on.
Is moved in the sub-scanning direction, and it is confirmed whether the reading range includes the portion to be read (S5).

At this time, in the electric system shown in FIG.
When the “confirmation scan” mode is selected on the D touch panel 4, the selection of the “confirmation scan” mode is transmitted to the CPU 39 via the LCD driver 44. The CPU 39 that has recognized the selection of the “confirmation scan” mode receives a signal for instructing the movement of the carriage 15 given via the parallel-serial conversion circuit 48 from the carriage movement keys 14 a and 14 b. When the carriage movement keys 14a and 14b are operated, the power supply circuit 24a is turned on by the CPU 39 and the light source lamp 24 is turned on. The CPU 39 responds to instructions from the carriage movement keys 14a and 14b.
The motor driver 4 via the D / A converter 41
2 is controlled, and the DC motor 18 is driven.

Thus, even when the original 50 faces the back side and it is difficult to know which side the position of the portion to be read is located, the light illuminated from the light source lamp 24 allows the original 50 to be seen from the back side through the back side. 54 is illuminated. Even when a portion not to be copied is blindfolded, the location of the blindfold can be easily specified. Thus, FIG.
The main scanning LED array 6 and the sub scanning LE as shown in FIG.
The lit portion of the D array 7 is the mark 51 of the range to be read.
Is executed at the stage including (S6). The subsequent operation will be described later.

FIG. 7 is a flowchart showing another example of the procedure for enlarging and copying the portion to be read.

First, in order to prevent the original 50 from being read obliquely, the original 50 is placed on the original glass 2 so as to match the end of the original glass 2 as shown in FIG. 5B (S1).
1).

By operating the main scanning range designating keys 10a and 10b and the main scanning range toggle key 11, the main scanning LED is operated.
The width of the lit portion of the array 6 is the mark 5 of the portion to be read.
The width is set to be larger than the width of 1 (S12).

At this time, in the electric system shown in FIG. 4, an instruction to specify the main scanning range by the main scanning range designating keys 10a and 10b and the main scanning range toggle key 11 is given to the CPU 39 via the parallel / serial conversion circuit 48. In accordance with the main scanning range designation, the CPU 39 outputs a signal indicating the lighting range of the main scanning LED array 6 to the LED driver 46 via the serial / parallel conversion circuit 47. According to the signal, the LED driver 46 causes the main scanning LE.
The lighting of the D array 6 is performed.

Next, the sub-scanning range designation keys 12a and 12b
By operating the sub-scanning range toggle key 13, the width of the lit portion of the sub-scanning LED array 7 is set to be larger than the width of the mark 51 that is the portion to be read (S).
13).

At this time, in the electric system shown in FIG. 4, an instruction to specify the sub-scanning range by the sub-scanning range specifying keys 12a and 12b and the sub-scanning range toggle key 13 is given to the CPU 39 via the parallel-serial conversion circuit 48. In response to the sub-scanning range designation, the CPU 39 outputs a signal indicating the lighting range of the sub-scanning LED array 7 to the LED driver 46 via the serial / parallel conversion circuit 47. According to the signal, the LED driver 46 causes the sub-scanning LE.
The lighting of the D array 7 is performed.

Here, the CPU 39 calculates a magnification for maximizing the range indicated by the lit portions of the main scanning LED array 6 and the sub-scanning LED array 7 to the output paper size (S).
14). For this purpose, for example, a mode of “enlarge to the output size” is provided in the magnification setting of the LCD touch panel 4, and when the mode is selected, the CPU 39 calculates the magnification. At this time, in the electric system shown in FIG. 4, the LCD panel 4 notifies the CPU 39 via the LCD driver 44 that the output paper size and the "enlarge to output size" mode are selected. CPU
39 calculates the enlargement magnification based on the size of the output paper and the serial signal output to the serial / parallel conversion circuit 47. At this time, the magnification in the main scanning direction and the magnification in the sub scanning direction are separately calculated.

In this case, since the vertical magnification and the horizontal magnification cannot be set separately, the magnification is fixed to one of the main scanning and the sub-scan. Therefore, the output paper 52
The user designates which part of the document is to be printed (S15). For example, an output print area setting mode for setting a print area of the output paper 52, for example, a “centering” mode is provided, and “centering” is selected on the LCD touch panel 4 so that the portion to be read is in the middle of the output paper 52. Set.

Thereafter, "confirmation scan" is selected on the LCD touch panel 4, and the carriage movement keys 14a, 14b
Is operated to move the carriage 15 in which the light source lamp 24 is turned on in the sub-scanning direction, and confirm whether the reading range includes the portion to be read (S16). This allows
Even when the original 50 faces the back side and it is difficult to know on which side the position of the reading target part is located, the reading target part 54 is illuminated through the original from the back side.

In this way, as shown in FIG. 5C, copying is executed when the lighting portions of the main scanning LED array 6 and the sub-scanning LED array 7 include the range to be read (S17).

After setting the reading magnification shown in FIG. 6 or FIG. 7, with the original 50 placed on the original glass 2, the original cover 3 is closed and a copy command or a read command from a host computer (not shown) is issued. When issued, CPU
Reference numeral 39 turns on the light source lamp 24, controls the motor driver 42, and rotates the DC motor 18. As a result, the carriage 15 connected by the drive pulley 19 and the drive wire 21 is driven in the sub-scanning direction from the reading start position at a constant speed determined by the reading resolution calculated from the magnification setting.

The color image sensor 27 starts reading operation by the image sensor driving circuit 36.
The original 50 is irradiated by the light of the light source lamp 24 through the original glass 2, and the reflected light from the original 50 is transmitted through the aperture 25.
As a result, the reading line width in the sub-scanning direction is reduced, and the light enters the carriage 15. The reflected light from the original 50 is reflected by the reflection mirror 26, formed into an image on the color image sensor 27 by the imaging lens 28, and accumulated as a charge in the photodiode of the color image sensor 27.

Using the cycle of the line synchronizing signal 37 generated by the image sensor drive circuit 36 as the charge storage time, the charges stored in the charge storage section of the color image sensor 27 are shifted to the charge transfer section. Next line period signal 37
Data corresponding to red, green, and blue in the charge transfer section is simultaneously and sequentially transferred in the cycle of, and is output as an electric signal for each pixel by the pixel clock generated by the image sensor drive circuit.

The three output signals output from the color image sensor 27 are different from each other as shown in FIG.
The signal is amplified by two amplifiers 29 and converted into digital data by an A / D converter 30. The digital data output from the A / D converter 30 is output to the buffer memory 32 as image data normalized by the shading correction circuit 31.

The obtained image data is added to the count value of the buffer counter 35 only for data requested to be transferred to an external host computer (not shown) or a printer controller (not shown) according to the write permission of the CPU 39. The data is taken into the buffer memory 32. The data fetched into the buffer memory 32 is transmitted to the interface controller 34 asynchronously with this operation.
Is transferred by the DMA controller 33 to an external host computer (not shown) or a printer controller (not shown). At this time, the count value of the buffer counter 35 is reduced by the number of transfer data.

The 8-bit digital data output from the CPU 39 is converted into an analog signal by the D / A converter 41 and is converted into a current value by the motor driver 42. The DC motor 18 rotates according to the current value of the motor driver 42.

At this time, D is
With the rotation of the C motor 18, two-phase pulses are generated.
The pulse is counted by a counter built in the CPU 39 and processed as a value of the absolute position of the sub-scan for reading.

As described above, the main scanning LED array 6
In addition, the portion represented by the lit portion of the sub-scanning LED array 7 is read at a designated resolution determined by the magnification setting, and data is transferred to a printer controller (not shown), so that only the portion to be read of the original is full of output paper and output. Enlarged copying can be performed at the center of the sheet.

Further, in the above-described embodiment, the case where the reading range is set is described by taking the enlarged copy as an example. However, the same range can be set in the same size copy and other magnifications.

FIG. 8 is a view for explaining another configuration of the image reading apparatus of the present invention, and FIG. 9 is a view for explaining still another configuration of the image reading apparatus of the present invention.

In the above embodiment, the sub-scanning LED array 7 is arranged on the near side as shown in FIG. 8A, but may be arranged on the far side as shown in FIG. 8B. .

In the above embodiment, the main scanning LED
Although the initial lighting portion of the array 7 is not specified, FIG.
Any initial setting may be used, such as in the case of end face alignment as shown in FIG. 8A or in the case of center alignment as shown in FIG.

In the above embodiment, the main scanning range designating keys 10a and 10b are adjusted by using the main scanning range toggle key 11 one by one at both ends of the lit portion of the main scanning LED array 6. The main scanning range toggle key 11 is abolished as shown in FIG.
The function of setting the reading range by simultaneously moving the both ends of the illuminated portion of the main scanning LED array 6 in the opposite direction by operation b to expand or contract may be used.

Similarly, the sub-scanning range designation keys 12a, 12a
b is adjusted by using the sub-scanning range toggle key 13 for each side of both ends of the lighting portion of the sub-scanning LED array 7.
As shown in FIG. 9A, the sub-scanning range toggle key 13 is abolished, and by operating the sub-scanning range designating keys 12a and 12b, both ends of the lighting portion of the sub-scanning LED array 7 are simultaneously moved in the opposite direction to expand or contract. In this case, the reading range may be set and operated.

In the above embodiment, the lighting portion of the main scanning LED array 6 is moved by using the main scanning position moving keys 8a and 8b, but the main scanning position moving keys 8a and 8b are moved.
b is abolished, the main scanning range designation keys 10a and 10b and the main scanning range toggle key 11 are used to individually move the ends of the LED lighting portions, or the main scanning position moving key 8a as shown in FIG. 9B. , 8b, the main scanning range toggle key 11, the sub-scanning position moving keys 9a, 9b, and the sub-scanning range toggle key 13 are abolished, and an end for moving each of the main scanning LED array 6 and the sub-scanning LED array 7 in the lighting portion. A configuration having a designation key 70 dedicated to a unit may be used.

In the above embodiment, an A3 size image reading device is taken as an example, but any other size image reading device may be used.

Further, in the above embodiment, the LED array is used as the display means of the reading position and the range, but an LCD or any other display method may be used.

In the above embodiment, the main scanning position moving keys 8a and 8b and the sub scanning position moving keys 9a and 9b
May be used, and a jog shuttle or a touch panel key or any other means for arbitrarily setting and operating the reading position may be used.

In the above embodiment, the main scanning LED
In order to display the reading position and range on the array 6 and the sub-scanning LED array 7, the entire reading range width is turned on. If you can see the range of reading, such as turning off the LED of
Any other pattern may be used.

In the above embodiment, the main scanning position moving keys 8a and 8b and the sub scanning position moving keys 9a and 9b are used.
Are arranged beside the original glass 2, the function may be included in the LCD touch panel 4. In the above embodiment, the color image sensor 2 is used as the line sensor.
7 is used, but a monochrome image sensor may be used as the line sensor.

The image reading device may be any image reading device using a light source switching type light source or a filter switching type light source.

In the above embodiment, the DC motor 1
Although 8 is used, any driving means including a pulse motor and a linear motor may be used.

Further, in the above embodiment, the reading position measurement and the speed measurement are performed by the motor encoder 43, but any other position measurement including the linear encoder can be performed.
Speed measurement may be used.

Further, in the above embodiment, the image reading apparatus is of a carriage moving type, but the image reading apparatus moves the optical system relatively to the original including the original moving type in the sub-scanning direction. I just need.

In the above-described embodiment, an asynchronous interface is used as an interface with the outside of the image reading apparatus. However, an interface for transferring data to a host computer or a printer by synchronous transfer may be used.

[0107]

As described above, according to the image reading apparatus of the present invention, the reading area that is arbitrarily set can be known from the reading area display means, so that it is difficult to misplace the reading area and the reading object can be determined. It becomes easy to include it in the reading area.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an image reading apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a carriage driving mechanism of the image reading apparatus of FIG. 1;

FIG. 3 is a conceptual diagram showing a configuration inside a carriage of the image reading apparatus of FIG. 1;

FIG. 4 is a block diagram showing a configuration of an electric system of the image reading apparatus of FIG. 1;

FIG. 5 illustrates an enlarged copy of a portion to be read according to the embodiment of the present invention.

FIG. 6 is a flowchart illustrating an example of a procedure for enlarging and copying a portion to be read;

FIG. 7 is a flowchart showing another example of a procedure for enlarging and copying a portion to be read;

FIG. 8 is a diagram illustrating another configuration of the image reading apparatus of the present invention.

FIG. 9 is a diagram illustrating still another configuration of the image reading apparatus of the present invention.

FIG. 10 is a view for explaining how to place a document in a conventional image reading apparatus.

FIG. 11 is a view for explaining how to place a document in a conventional image reading apparatus.

FIG. 12 is a diagram illustrating an enlarged copy of a portion to be read by a conventional image reading device.

FIG. 13 is a flowchart showing a procedure for enlarging and copying a portion to be read by a conventional image reading apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image reading apparatus main body 2 Original glass 6 Main scanning LED array 7 Sub scanning LED array 8a, 8b Main scanning position moving key 9a, 9b Sub scanning position moving key 10a, 10b Main scanning range designation key 11 Main scanning range toggle key 12a, 12b Sub-scanning range designation key 13 Sub-scanning range toggle key 14a, 14b Carriage movement key 15 Carriage 24 Light source lamp 25 Aperture 26 Reflection mirror 27 Color image sensor

Claims (6)

[Claims] 1. A reading area setting means for setting a reading area for reading an image, and a reading area display showing the set reading area by changing a display in accordance with the setting of the reading area setting means. And an image reading device. 2. The apparatus according to claim 1, further comprising a document glass on which a document to be read is placed, and wherein said reading area display means is arranged around said document glass. An image reading device according to claim 1. 3. The reading area setting means includes reading position setting means for setting an image reading position, and the reading area display means changes a display in accordance with the setting of the reading position setting means. 3. The image reading apparatus according to claim 1, further comprising a reading position display unit that indicates a set reading position. 4. The reading area setting means includes a reading range setting means for setting an image reading range, and the reading range setting means changes a display in accordance with the setting of the reading range setting means. 4. The image reading apparatus according to claim 1, further comprising a reading range display unit that indicates a set reading range. 5. The image reading apparatus according to claim 1, wherein said reading area display means includes an irradiating means for irradiating light to the reading area set by said reading area setting means when a reading area is set. . 6. A line sensor for reading an image while moving the reading line in a direction perpendicular to the reading line, and the moving direction of the reading line of the line sensor according to a setting of an image reading area. 6. The image reading device according to claim 5, further comprising: a moving unit that moves a place irradiated by the irradiation unit.