JP6287694B2 - Image reading apparatus and image reading method - Google Patents

Description

  The present invention relates to an image reading apparatus and an image reading method.

  2. Description of the Related Art Conventionally, there is an image reading apparatus that reads an image on the front surface and an image on the back surface of a document with a single document transport. In this image reading apparatus, for example, the surface of a document is read by a CCD image sensor (CCD: Charge Coupled Device), and the back side of the document is read by a contact image sensor (CIS: Contact Image Sensor).

  In order to increase the image reading speed of such an image reading apparatus, for example, Japanese Patent Application Laid-Open No. 2010-166318 (Patent Document 1) discloses a gain adjustment when a single-sided reading mode is selected and a start key is operated. An image forming apparatus that speeds up a document reading operation by prioritizing reading of surface information of a document without performing gain adjustment immediately even in a state where the document reading is possible is disclosed.

JP 2010-166318 A

  As described above, the image reading apparatus has a problem of speeding up image reading of a document. On the other hand, since the technique described in Patent Document 1 described above is applied when the single-sided reading mode is set, there is a problem that it cannot be applied when the next job exists.

  Therefore, the present invention has been made to solve the above-described problem. When a next job exists after image reading of a document is completed, an image that can accelerate reading of the image of the document can be accelerated. An object is to provide a reading apparatus and an image reading method.

An image reading apparatus according to one aspect of the present invention includes a contact glass on which a document is placed, a CCD, a light source, a reflection mirror, a scanning frame, a scanner unit, a document transport unit, an activation continuation unit, An image reading apparatus. The scanning frame body is mounted with the light source and the reflecting mirror and is movable. The document conveying unit is mounted on the scanner unit, conveys the document, and passes over a reading position for reading the document by the CCD of the scanner unit. The document transport unit incorporates a CIS for a document. The image reading control unit causes the CCD, the CIS, and the CCD to execute the image reading job in the double-sided reading mode in which the first side of the original is read by the CCD and the second side of the original is read by the CIS. Power is supplied to an amplifier that amplifies the output signal from the CIS and an amplifier that amplifies the output signal from the CIS. The next job determination unit determines whether or not there is a next image reading job following the image reading job when the image reading job in the double-sided reading mode is completed, and there is a next image reading job. In this case, it is determined whether or not the next image reading job is an image reading job in the double-sided reading mode. Start continuation portion, if the previous SL first after the job is finished, which is an image reading job definitive in duplex scanning mode, the second job is an image reading job in the double-sided reading mode subsequent exists, stopping the CIS Instead, the CIS activation mode is executed to continue the activated state.

In addition, when the CIS activation mode is executed, the activation continuation unit does not perform CIS shading correction before reading the document of the second job between the first job and the second job .

In such a configuration, when the next job determination unit determines that there is a next image reading job and determines that the next image reading job is an image reading job in the double-sided reading mode, the start-up continues. The unit performs the above-described operation, and starts when the next job determination unit determines that there is a next image reading job and the next image reading job is not an image reading job in the double-sided reading mode. The stop unit stops the CIS by stopping power supply to the CIS by the image reading control unit.

In the above configuration, when the elapsed time from the time when it is determined that the next image reading job is present exceeds a preset threshold time, the start / stop unit is the CIS by the image reading control unit. The power supply to the amplifier that amplifies the output signal from the CIS is stopped.

An image reading method according to an aspect of the present invention includes an image reading apparatus including a contact glass on which a document is placed, a CCD, a light source, a reflection mirror, a scanning frame, a scanner unit, and a document conveying unit. This is an image reading method. The scanning frame body is mounted with the light source and the reflecting mirror and is movable. The document conveying unit is mounted on the scanner unit, conveys the document, and passes over a reading position for reading the document by the CCD of the scanner unit. The document transport unit incorporates a CIS for a document. Image reading method, as well as to read the first side of the document in the CCD, when the duplex scanning image reading job definitive mode to read the second side of the document in CIS has been completed, followed by the image reading job A step of determining whether or not there is a next image reading job and determining whether or not the next image reading job is an image reading job in the double-sided reading mode when there is a next image reading job; Is provided. Further, after the first job is an image reading job definitive in the duplex scanning mode is finished, when the second job is an image reading job in the double-sided reading mode subsequent to exist, without stopping the CIS, as it is activated The CIS start mode for continuing the state is executed , and when the CIS start mode is executed, the shading correction of the CIS before reading the document of the second job is performed between the first job and the second job. A startup continuation step that is not performed is provided. In the determination step, when it is determined that there is a next image reading job and the next image reading job is determined to be an image reading job in the double-sided reading mode, the start continuation step is performed, In the determination step, when it is determined that there is a next image reading job and the next image reading job is not an image reading job in the double-sided reading mode, the power supply to the CIS is stopped. A step of stopping the CIS is performed.

  An image reading method according to an aspect of the present invention includes an image reading apparatus including a contact glass on which a document is placed, a CCD, a light source, a reflection mirror, a scanning frame, a scanner unit, and a document conveying unit. This is an image reading method. The scanning frame body is mounted with the light source and the reflecting mirror and is movable. The document conveying unit is mounted on the scanner unit, conveys the document, and passes over a reading position for reading the document by the CCD of the scanner unit. In the image reading method, in the reading mode in which the original is read by the CCD, if there is a second job following the first job, the CCD is not stopped and the activated state is continued as it is. An activation continuation step for executing the CCD activation mode is provided.

  According to the image reading apparatus and the image reading method of the present invention, when the next job exists after the image reading of the document is completed, the start of reading the image of the document can be accelerated.

FIG. 1 is a schematic diagram (FIG. 1A) of a multifunction peripheral according to an embodiment of the present invention, and a schematic diagram (FIG. 1B) of a cross-sectional front view of an image reading unit according to the present invention. It is a figure which shows the structure of the control system hardware of the multifunctional device which concerns on embodiment of this invention. 2 is a functional block diagram of a multifunction peripheral according to first and second embodiments of the present invention. FIG. It is a flowchart for showing the execution procedure of 1st embodiment of this invention. FIG. 5A is a schematic diagram (FIG. 5A) of a cross-sectional front view of the image reading unit according to the present invention, a diagram showing the relationship between CIS, ASIC, and CCD at the start of double-sided image reading (FIG. 5B). FIG. 5C is a diagram (FIG. 5C) showing a relationship with the CCD. It is a flowchart for showing the execution procedure of 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not. Moreover, the alphabet S added before the number in a flowchart means a step.

  Hereinafter, as an example of an embodiment of the present invention, an image forming apparatus including an image reading unit capable of reading both sides of a document will be described. Note that the image forming apparatus of the present invention corresponds to, for example, a multi-function peripheral (MFP) having functions such as a copy, a scanner, and a printer.

  As shown in FIG. 1A, the multi-function device 100 receives a print job setting condition from a user via an operation unit, reads an image on one or both sides of a document with an image reading unit 101, and forms an image forming unit 104, a conveying unit. Then, the fixing unit or the like is driven to provide the print job.

  Here, as shown in FIG. 1B, the image reading unit 101 includes a document conveying unit 102 (automatic document feeding unit Auto Document Feeder, ADF) and a scanner unit 103, and a CCD 103 a is arranged in the scanner unit 103, and the document A CIS 102 a is arranged in the transport unit 102. A contact glass 103b is disposed in the scanner unit 103, and a scanning frame (carriage) 103c, a light source 103d, a mirror 103e, a lens 103f, and a CCD 103a are disposed in the housing of the scanner unit 103. The document transport unit 102 includes a document tray 102b, a document set sensor 102c, a transport roller 102d, a feed sensor 102e, a CIS 102a, and a document discharge tray 102f. The document conveying unit 102 is mounted on the upper portion of the scanner unit 103, conveys the document, and passes over a reading position for reading the document by the CCD 103a of the scanner unit 103. The CCD 103a reads an image on the surface of the document placed on the contact glass 103b, and also reads an image on the surface of the document conveyed by the document conveyance unit 102. The CIS 102 a reads an image on the back side of the document conveyed by the document conveyance unit 102.

  Next, the configuration of the control system hardware of the MFP 100 will be described with reference to FIG. As shown in FIG. 2, the control circuit of the MFP 100 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, an HDD (Hard Disk Drive) 204, and each drive unit. A driver 205, an image reading unit 101, a document conveying unit 102, a scanner unit 103, and an image forming unit 104 are connected by an internal bus 206.

  The CPU of the MFP 100 uses, for example, a RAM as a work area, executes a program stored in a ROM, an HDD, and the like, and based on the execution result, a driver, an image reading unit 101, a document conveying unit 102, a scanner Data and instructions, signals, commands, etc. from the unit 103 and the image forming unit 104 are exchanged to control the operation of each drive unit shown in FIG. Further, with respect to each means (shown in FIG. 3) to be described later other than the drive unit, the CPU realizes each means by executing each program. The ROM, RAM, HDD, and the like store programs and data that implement each means described below.

  Next, the configuration and execution procedure according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4. First, when the user turns on the power of the multifunction device 100, the display accepting unit 301 of the multifunction device 100 displays an operation screen on the touch panel of the operation unit and starts accepting a print job. When the scanner function on the operation screen is selected by the user, an image reading (scanner) program is activated, and the image reading control unit 302 starts accepting image reading of a document.

  Here, when a user places a document (one or a plurality) for duplex printing on the document tray 102b of the document conveying unit 102 and inputs a duplex printing job including a duplex image reading job via the operation unit, The display receiving unit 301 receives the duplex printing job (FIG. 4: S101) and notifies the image reading control unit 302 to that effect. Upon receiving the notification, the image reading control unit 302 causes the CCD 103a to read the first side (front side) of the document and shifts to a double-sided reading mode in which the CIS 102a reads the second side (back side) of the document. As shown in FIG. 5A, the CCD 103a for reading an image on one side (front side) of the document is activated in the document conveying unit 102 (FIG. 4: S102), and a CIS 102a for reading an image on the other side (back side) of the document. Is activated (FIG. 4: S103).

  Here, when the image reading control unit 302 activates the CCD 103a, it is as follows. That is, as shown in FIG. 5B, the CCD 103a is connected to an amplifier (AFE) 500 that amplifies the output signal from the CCD 103a, and the AFE 500 is connected to an ASIC 501 that processes the amplified signal from the AFE 500 as image data. The ASIC 501 is connected to a light source 103d (LED) for irradiating a document. The CCD 103a outputs an output signal corresponding to the reflected light of the document. Therefore, the image reading control unit 302 supplies power to the CCD 103a, the AFE 500, and the ASIC 501 (ON), and sets the scanning frame 103c on which the light source 103d is mounted on the surface of the original conveyed from the original conveying unit 102. The reading position is moved to the facing position and stopped at the reading position. A white plate for shading is disposed at a position opposite to the reading position. The image reading control unit 302 makes the scanning frame 103c face the white plate, turns on the light source 103d, and performs shading correction before starting the image reading. The image reading control unit 302 performs processing (shading correction, HSYNC (Horizontal Synchronizing Signal), AGC (Automatic Gain Control, automatic gain control, etc.) processing between the CCD 103a and the ASIC 501. . These processes require several seconds to several tens of seconds. When these processes are completed, the image reading control unit 302 can start reading an image on the surface of the document using the CCD 103a. The image reading control unit 302 turns on the light source 103d at the start of image reading on the surface of the document, and turns off the light source 103d at the end.

  When the image reading control unit 302 activates the CIS 102a when executing a double-sided image reading job, the operation is as follows. That is, as shown in FIG. 5B, the CIS 102a is connected to an amplifier (AFE) 502 that amplifies an output signal from the CIS 102a, and the AFE 502 processes an amplified signal from the AFE 502 as image data. It is connected to the. Therefore, the image reading control unit 302 supplies power to the CIS 102a, the light source of the CIS 102a, the AFE 502, and the ASIC 501 (ON). The image reading control unit 302 performs processing (shading correction, gain adjustment, etc.) between the CIS 102a and the ASIC 501. These processes require several seconds to several tens of seconds. When these processes are completed, the image reading control unit 302 can start image reading of the back side of the document using the CIS 102a.

  When the activation of the CIS 102a is completed, the image reading control unit 302 conveys the documents placed on the document tray 102b one by one via the document conveying unit 102 (FIG. 4: S104), and the document. Image reading on both sides is started (FIG. 4: S105).

  First, as shown in FIG. 5A, the image reading control unit 302 uses the document set sensor 102c provided in advance on the most downstream side of the document tray 102b to determine whether a document is set on the document tray 102b. Detect whether or not. When the image reading control unit 302 detects that the document is set, the image reading control unit 302 rotates a predetermined motor to rotate a conveyance roller 102d provided in advance on the downstream side of the document tray 102b. The document is pulled out from the tray 102b and conveyed.

  Next, the image reading control unit 302 uses the feed sensor 102e provided in advance on the conveyance path to confirm the conveyance of the document and to take the reading timing of the document. First, the CIS 102a Then, the image on the back side of the conveyed document is read. Next, the image reading control unit 302 continues the conveyance of the document and reads an image on the surface of the conveyed document by the CCD 103a. Thereby, the reading of the images on both sides of the document is completed. Then, the image reading control unit 302 discharges the conveyed document by the document discharge tray 102f, and completes the image reading on both sides of one document. By repeating such image reading, reading of the double-sided image of the document necessary for the double-sided printing job is completed.

  When the image reading control unit 302 completes the image reading on both sides of the document, the image forming control unit 303 notifies the image forming control unit 303 to that effect, and the image forming control unit 303 that has received the notification reads the reading via the image forming unit 104. Image formation is executed based on the printed images on both sides (FIG. 4: S106), and the user can obtain a printed material that has been printed on both sides.

  Here, when the image reading control unit 302 ends the double-sided image reading job of the received double-sided printing job (first job in the double-sided reading mode), the image reading control unit 302 notifies the next job determination unit 304 to that effect, In response to this, the next job determination unit 304 determines whether or not there is a next image reading job (second job following the first job) (FIG. 4: S107).

  Here, the determination method by the next job determination unit 304 is not particularly limited. For example, the elapsed time from the time when the double-sided image reading job is completed is measured, and the elapsed time thus measured is a predetermined value set in advance. Until the first threshold time (several minutes or the like) is exceeded, it is determined whether or not the document set sensor 102c has detected a document by using the document set sensor 102c of the document transport unit 102. When the user inputs the next image reading job, when the double-sided image reading job is completed, a document corresponding to the next image reading job is set on the document tray. Therefore, when the elapsed time exceeds the first threshold time, the original set sensor 102c detects the original, so that the next job determination unit 304 determines that the next double-sided image reading job exists. . On the other hand, if the document set sensor 102c does not detect a document when the elapsed time exceeds the first threshold time, the next job determination unit 304 determines that the next double-sided image reading job does not exist. .

  As a result of the determination, if the next image reading job exists (FIG. 4: S107 YES), the next job determining unit 304 determines that the next image reading job is a double-sided image reading job using the CIS 102a (the double-sided reading). It is determined whether the job is a second job in the mode (FIG. 4: S108). Here, for example, when the user places a document on the document tray and inputs a next image reading job (for example, a duplex printing job including a duplex image reading job) via the operation unit, The job determination unit 304 acquires the next image reading job from the display receiving unit 301 that has received the next image reading job, and determines whether the next image reading job is the double-sided image reading job.

  If the result of the determination is that the next image reading job is the double-sided image reading job (FIG. 4: S108 YES), the next job determining unit 304 notifies the activation continuation unit 305 to that effect and has received the notification. The activation continuation unit 305 executes a CIS activation mode in which the activated state is continued without stopping the CIS 102a. In other words, the activation continuation unit 305 keeps the activated CIS 102a as it is without stopping the activated CIS 102a (FIG. 5: S109). When the CIS activation mode is executed, the activation continuation unit 305 does not perform the processing of the CIS 102a before reading the document of the second job. Accordingly, when the next image reading job is started, it is possible to immediately start double-sided image reading. That is, conventionally, the power supply to the CIS 102a is stopped in spite of using the CIS 102a in the next image reading job. In this case, when the next image reading job is started, the CIS 102a is restarted. However, as described above, the startup of the CIS 102a requires the above-described processing and takes time. Problems can arise. In the present invention, by setting the CIS 102a in the activated state, it is possible to immediately start double-sided image reading without performing the above-described processing, thereby improving user convenience.

  When the activation continuation unit 305 continues the activation of the CIS 102a, it notifies the image reading control unit 302 to that effect, and the image reading control unit 302 that has received the notification uses the document set sensor 102c to read the image. Whether or not can be started is determined (FIG. 4: S110).

  As a result of the determination, if the image reading can be started (FIG. 4: S110 YES), the image reading control unit 302 conveys the document via the document conveying unit 102 (FIG. 4: S104), as described above. Image reading on both sides of the document is started (FIG. 4: S105).

  By the way, when the next job determination unit 304 determines in S107 that the next image reading job exists, the start stop unit 306 notifies the start stop unit 306 to that effect. The elapsed time from when it is determined that there is an image reading job is counted, and it is determined whether the measured elapsed time exceeds a preset second threshold time (FIG. 4: S111).

  As a result of the determination, if the elapsed time does not exceed the second threshold time (FIG. 4: S111 NO), the process returns to S110 and waits for the image reading control unit 302 to determine that image reading can be started, The start / stop unit 306 repeats the determination (FIG. 4: S111).

  On the other hand, when the elapsed time exceeds the second threshold time in S111 as a result of the determination (FIG. 5: S111 YES), the start / stop unit 306 executes the next double-sided image reading job for some reason. It is determined that it is not performed, and the normal termination process of the CIS 102a in the activated state is executed (FIG. 5: S112). In this case, as shown in FIG. 5C, the start / stop unit 306 stops the power supply to the CIS 102a and the AFE 502 (OFF). In this case, when the CIS 102a is turned off, the light source 103d is turned off and the power supply to the ASIC 501 is stopped (OFF). As a result, it is possible to suppress power consumption due to activation of the CIS 102a.

  In this case, for example, a process in which the user sets a document on the document tray 102b again and restarts the next double-sided image reading job or cancels the next double-sided image reading job itself. (FIG. 4: S113). When the CIS 102a is stopped and then restarted, as described above, the processing between the CIS 102a and the AFE 502 and the processing between the AFE 502 and the ASIC 501 are performed.

  By the way, when the user inputs a next image reading job (for example, a single-sided printing job including a single-sided image reading job) via the operation unit in S108, the following is performed. As a result of the determination, when the next image reading job is not the double-sided image reading job (FIG. 4: S108 NO), the next job determining unit 304 notifies the start / stop unit 306 to that effect, and the start receiving the notification The stop unit 306 stops the active CIS 102a (FIG. 4: S114). In this case, since the CIS 102a is not used, the process returns to S104, and the image reading control unit 302 transports the document via the document transport unit 102 (FIG. 4: S104), as described above. Single-sided image reading is started (FIG. 4: S105). In this case, the image formation control unit 303 performs image formation based on the read one-sided image via the image formation unit 104 (FIG. 4: S106).

  When the next image reading job does not exist in S107 (FIG. 4: S107 NO), the next job determination unit 304 notifies the activation stopping unit 306 to that effect, and the activation stopping unit 306 that has received the notification Then, the active CCD 103a and CIS 102a are stopped. Thereby, all the processes are completed.

  Next, the configuration and execution procedure according to the second embodiment of the present invention will be described with reference to FIG. First, when the user turns on the power of the multi-function device 100, the display receiving unit 301 of the multi-function device 100 starts accepting a print job, and the image reading control unit 302 of the multi-function device 100 reads the image of the original. Start accepting.

  Here, when the user places a document on the document tray 102b of the document transport unit 102 and inputs a print job including a single-sided image reading job, the display reception unit 301 receives the print job (FIG. 6: S201). ), The image reading control unit 302 shifts to a reading mode in which the CCD 103a reads a document, and as shown in FIG. 5A, the image reading control unit 302 sets the CCD 103a for reading an image on the surface of the document on the document tray 102b in the document transport unit 102. It starts (FIG. 6: S202). The activation of the CCD 103a is the same as described above. As shown in FIG. 5B, the image reading control unit 302 supplies power to the CCD 103a, the AFE 500, and the ASIC 501 (ON), and the CCD 103a and the ASIC 501. (Register setting, etc.)

  Next, the image reading control unit 302 moves the scanning frame 103c to the reading position, faces the white plate for shading, turns on the light source 103d (FIG. 6: S203), reads the white plate with the CCD 103a, Perform shading correction.

  Thereafter, the image reading control unit 302 moves the scanning frame 103c to a reading position for reading the surface of the original in the original conveying unit 102 and stops it. Then, the image reading control unit 302 conveys the document via the document conveying unit 102 and starts image reading on the surface of the document (S204 in FIG. 6).

  Here, the image reading control unit 302 first detects whether or not a document is set on the document tray 102b by using a document setting sensor 102c of the document conveying unit 102 as shown in FIG. 5A. When it is detected that the document is set, the transport roller 102d is rotated to pull out the document from the document tray 102b and transport the document. Then, the image reading control unit 302 uses the feed sensor 102e to take the reading timing of the original, turns on the light source 103d, and reads the image of the surface of the conveyed original using the CCD 103a. Thereby, the reading of the image on the surface of the document is completed.

  When the image reading control unit 302 completes image reading on one side of the document, the image forming control unit 303 executes image formation based on the read image via the image forming unit 104 (FIG. 6: S205). The user can obtain a printed material printed on one side.

  Here, when the image reading control unit 302 ends the image reading job (first job) of the accepted print job, the next job determining unit 304 determines the next image reading job (second job following the first job). Is determined (FIG. 6: S206).

  As a result of the determination, when the next image reading job exists (FIG. 6: S206 YES), the next job determining unit 304 notifies the image reading control unit 302 to that effect, and the image reading unit 302 that has received the notification. Performs turning off of the light source 103d (FIG. 6: S207). Further, the next job determination unit 304 notifies the activation continuation unit 305 to that effect, and the activation continuation unit 305 that has received the notification does not stop the CCD 103a and continues the activated state as it is. Execute. The activation continuation unit 305 keeps the activated CCD 103a in the activated state without stopping (FIG. 6: S208). The activation continuation unit 305 does not perform the shading correction of the CCD 103a before reading the document of the second job when the CCD activation mode is executed. As a result, when the next image reading job is started, the image reading can be started immediately without restarting the CCD 103a (shading correction, registration reset, etc.). Improve convenience.

  When the activation continuation unit 305 continues to activate the CCD 103a, the image reading control unit 302 determines whether image reading can be started using the document set sensor 102c (FIG. 6: S209), When reading can be started (FIG. 6: S209 YES), the image reading control unit 302 turns on the light source 103d (FIG. 6: S203) in the same manner as described above, and starts image reading on the surface of the document (FIG. 6). 6: S204).

  By the way, when the next job determination unit 304 determines in S107 that the next image reading job exists, the start / stop unit 306 determines the elapsed time from the time when it is determined that the next image reading job exists. Time is measured, and it is determined whether or not the elapsed time exceeds the preset second threshold time (FIG. 6: S210).

  As a result of the determination, when the elapsed time does not exceed the second threshold time (FIG. 6: S210 NO), the process returns to S209 and waits for the image reading control unit 302 to determine that image reading can be started, The start / stop unit 306 repeats the determination (FIG. 6: S210).

  On the other hand, if the elapsed time exceeds the second threshold time as a result of the determination in S210 (FIG. 6: S210 YES), or the user removes the document for the next image reading job from the document table for some reason. When removed, the start / stop unit 306 executes normal termination processing of the CCD 103a in the activated state (FIG. 6: S211). Here, the normal termination process includes stopping the start of the CCD 103a, moving the scanning frame 103c to a predetermined position (home position), stopping the ASIC 501, turning off the light source 103d, and the like. Therefore, when image reading of the original is started again after this, shading correction is performed by turning on the light source 103d, the movement of the scanning frame 103c is adjusted, and the image can be read by the CCD 103a. When the user sets a document on the document tray 102b of the document transport unit 102 again and restarts the next image reading job, the multifunction peripheral 100 starts transporting the document and reading the image (FIG. 6: S212). When the next image reading job is resumed by conveying the document from the document tray 102b with the light source 103d turned off, the condition of the image reading job (for example, the reading linear velocity) is When the image reading job is different from the image reading job, for example, when changing the full color / monochrome mode or reading resolution, the image reading control unit 302 moves the scanning frame 103c to the home position, resets the ASIC 501, and performs shading correction. Although the process is performed, the resetting and shading correction processes are completed during the execution of the original skew correction in the original conveying unit 102, so that the time required for image reading is not affected.

  When the next image reading job does not exist in S206 (FIG. 6: S206 NO), the next job determination unit 304 notifies the activation stopping unit 306 to that effect, and the activation stopping unit 306 that has received the notification Then, the active CCD 103a is stopped. Thereby, all the processes are completed.

  In the embodiment of the present invention, the image forming apparatus having the image reading control unit 102 is assumed. However, the image forming apparatus may be applied to the image reading apparatus. In the embodiment of the present invention, the MFP 100 is configured to include each unit. However, a program that realizes each unit may be stored in a storage medium, and the storage medium may be provided. In this configuration, the program is read by the image reading device, and the image reading device realizes the respective units. In that case, the program itself read from the recording medium exhibits the effects of the present invention. Furthermore, it is also possible to provide a method for storing the steps executed by each unit in a hard disk.

  As described above, the image reading apparatus and the image reading method according to the present invention are useful not only for complex machines but also for image reading apparatuses such as copying machines, printers, scanners, and the like. When a job exists, this is effective as an image reading apparatus and an image reading method that can speed up the start of reading an image of the document.

DESCRIPTION OF SYMBOLS 100 MFP 101 Image reading part 102 Document conveying part 103 Scanner part 104 Image forming part 301 Display reception part 302 Image reading control part 303 Image formation control part 304 Next job determination part 305 Start continuation part 306 Start stop part

Claims (3)

A contact glass on which an original is placed, a CCD, a light source, a reflection mirror, a scanning frame body that includes the light source and the reflection mirror, and is movable; a scanner unit;
An image reading apparatus mounted on an upper part of the scanner unit and configured to convey a document and pass over a reading position for reading the document by the CCD of the scanner unit;
The document transport unit has a built-in document CIS,
Together to read the first side of the document in the CCD, the at second surface of the image reading job definitive in duplex scanning mode to read execution document in CIS, the CCD, the CIS, the output signal from the CCD An amplifier for amplifying, an image reading controller for supplying power to an amplifier for amplifying an output signal from the CIS;
When the image reading job in the double-sided reading mode is completed, it is determined whether or not there is a next image reading job following the image reading job, and if there is a next image reading job, the next image A next job determination unit that determines whether the reading job is an image reading job in the double-sided reading mode;
After the first job is an image reading job definitive in the duplex scanning mode is finished, when the second job is an image reading job in the double-sided reading mode subsequent to exist, without stopping the CIS, the intact during startup When the CIS activation mode for continuing the state is executed and the CIS activation mode is executed , the CIS shading correction before reading the original of the second job is not performed between the first job and the second job. A startup continuation unit ;
Equipped with a,
When the next job determination unit determines that there is a next image reading job and determines that the next image reading job is an image reading job in the double-sided reading mode, the activation continuation unit performs the above-described operation. When the next job determination unit determines that there is a next image reading job and determines that the next image reading job is not an image reading job in the double-sided reading mode, the start / stop unit performs the image reading job. An image reading apparatus , wherein the CIS is stopped by stopping power supply to the CIS by a control unit . When the elapsed time from the time when it is determined that the next image reading job exists exceeds a preset threshold time, the start / stop unit outputs the output signals from the CIS and the CIS by the image reading control unit. The image reading apparatus according to claim 1, wherein power supply to an amplifier that amplifies the signal is stopped . A contact glass on which an original is placed, a CCD, a light source, a reflection mirror, a scanning frame body that includes the light source and the reflection mirror, and is movable; a scanner unit;
An image reading method of an image reading apparatus, comprising: a document conveying unit mounted on an upper portion of the scanner unit, configured to convey a document and pass over a reading position for reading the document by the CCD of the scanner unit,
The document transport unit has a built-in document CIS,
Together to read the first side of the document in the CCD, when the image reading job definitive on both sides reading mode to read the second side of the document in the CIS has been completed, the next image reading job subsequent to the image reading job Determining whether there is a next image reading job, and determining whether the next image reading job is an image reading job in the double-sided reading mode;
After the first job is an image reading job definitive in the duplex scanning mode is finished, when the second job is an image reading job in the double-sided reading mode subsequent to exist, without stopping the CIS, the intact during startup When the CIS activation mode for continuing the state is executed and the CIS activation mode is executed , the CIS shading correction before reading the original of the second job is not performed between the first job and the second job. A startup continuation step ;
Equipped with a,
In the determination step, when it is determined that there is a next image reading job and it is determined that the next image reading job is an image reading job in the double-sided reading mode, the start continuation step is performed, and the determination In the step, when it is determined that there is a next image reading job and the next image reading job is not an image reading job in the double-sided reading mode, the power supply to the CIS is stopped to stop the CIS. An image reading method characterized in that a step of stopping is performed .

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