JPH1169041A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader capable of suppressing futile power consumption and performing double-side reading. SOLUTION: This reader is constituted of a 1st means system having an SBU part 17 of a 1st reading means, an SIP3 (45) for correcting a signal from the SBU part and DRAM 54 for storing the signal corrected by the SIP3 (45), a 2nd means system having a contact sensor 31 and RSUB part 30 of 2nd reading means, an SIP3 (35) for correcting signals from the 2nd reading means and DRAM 37 for storing the signals corrected by the SIP3 (35), and a power source control part for controlling the supply of power to the 1st and 2nd means systems corresponding to the operating mode designated through a user interface. Thus, since power can be supplied only to the required device, the power consumption of the image reader can be reduced.

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, and more particularly, to an image reading apparatus capable of reducing power consumption of an apparatus by controlling power supply inside the apparatus according to a requested operation. About.

[0002]

2. Description of the Related Art In recent years, with the development of image information processing technology for handling image information, such as an electronic filing system, digitization of documents has rapidly spread. Accordingly, in an image input apparatus for digitizing a so-called paper document, in addition to a demand for higher image quality and a higher speed, a demand for a reading unit for a two-sided document is also increasing. Further, power saving has become an important issue from the viewpoint of environmental protection and efficient use of energy, and it is desired to reduce power consumption as much as possible.

[0003] As a conventional image reading apparatus capable of reading a two-sided original at a time once the two-sided original is set in the apparatus, there is a "facsimile apparatus" disclosed in JP-A-3-3564. The facsimile apparatus of the first conventional example is
It is characterized in that image information printed on both sides of a document is read simultaneously by one scanning of the document, and transmitted separately on two sides, the front side and the back side.

As a means for reducing power consumption during standby of the apparatus, there is a "power saving method of a data processing apparatus" in Japanese Patent Application Laid-Open No. 3-129508 of prior art 2. In the power saving method of the data processing device according to the second conventional example, when the idling state elapses for a predetermined time, the state of the device is stored, and then the power is cut off.
It is characterized in that wasteful power consumption when the idling state continues for a long time is reduced.

[0005]

However, in the facsimile apparatus of the prior art 1 described above, when one side of a document is read, the power consumed by the reading system on the non-read side is substantially wasted. Although power is used, there is no mention of controlling power supply according to the reading mode to save power.

In order to maintain throughput, such an image reading apparatus capable of reading both sides of a document does not have a reversing mechanism for reversing the document, and reads image information on both sides of the document by transporting the document once. In order to enable this, a memory unit for temporarily storing image information for each of the first and second reading surfaces of the document is prepared, and a means for achieving the throughput by controlling these is provided. Proposed.

However, in the above-mentioned means, two circuit configurations are prepared from a sensor unit for reading image information on a document to immediately before transferring as image data to a user interface. In particular, when the same-size contact sensor is used for reading one side of a document to reduce the size of the whole apparatus, generally, a high-speed operation of the same-size contact sensor is disclosed in JP-A-8-242368. In order to transfer a two-sided image of a document in a frame-sequential manner, a unit for dividing one line into a plurality of blocks and transmitting the sensor output of each block in parallel is often used as disclosed in US Pat. Since the output is subjected to image correction and the like, and then converted into one line and then combined as a surface, the circuit scale may not always be small.

That is, although the overall size of the apparatus can be reduced because it does not have a document reversing mechanism,
In terms of power consumption, wasteful power is consumed depending on the selected operation mode.

According to the present invention, power consumption is controlled by controlling power supply means corresponding to a reading mode,
An object of the present invention is to provide an image reading apparatus capable of double-sided reading that realizes power saving.

[0010]

In order to achieve the above object, an image reading apparatus according to the present invention operates in an operation mode designated via a user interface, emits light from a light source, and becomes an object to be read. While irradiating the original, the reflected light or transmitted light is photoelectrically converted by a photoelectric conversion element, and is an image reading apparatus provided with original reading means for extracting image information on the original as an electric signal. A first reading unit for reading, a second reading unit for reading the other side of the document, and a first control unit for controlling power supply to the two reading units. And

Further, the above-mentioned image reading apparatus includes a first image reading device for correcting the image data read by the first reading means.
Image correction means, first storage means for storing image data corrected by the first image correction means, second image correction means for correcting image data read by the second reading means, A second storage unit that stores the image data corrected by the second image correction unit, and a power supply to a first unit system including the first reading unit, the first image correction unit, and the first storage unit First power control means for controlling the supply, and second power control means for controlling the power supply to a second means system comprising a second reading means, a second image correcting means, and a second storage means And a second unit for controlling output of image data stored in the first storage unit and the second storage unit.
The second control means transfers the image data stored in the first storage means and the image data stored in the second storage means to the user interface in a frame-sequential manner. And the first control means may control the first power supply control means and the second power supply control means to control power supply to the first means system and the second means system. .

Further, the control operation setting of the first control means may be performed via a user interface.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an image reading apparatus according to an embodiment of the present invention; 1 to 4 show an embodiment of the image reading apparatus of the present invention. FIG. 1 is an overall configuration diagram showing an embodiment of the image reading apparatus of the present invention, FIG. 2 is a block diagram showing the configuration and connection relationship of a memory control unit and an image processing unit, and FIG. FIG. 4 is a block diagram illustrating a configuration of a two-side reading unit. FIG. 4 is a diagram illustrating a power supply control method performed by a power control unit.

First, the configuration of the present embodiment and a document reading operation will be described with reference to FIG. In FIG. 1, 1
Is a platen glass, 2 is a first mirror, 3 is an illumination lamp, 4
Is a second mirror, 5 is a third mirror, 6 is a CCD, 7 is a traveling body motor, 8 is a document tray, 9 is a pickup roller,
Reference numeral 10 denotes a registration roller, 11 denotes a conveyance drum, 12 denotes a conveyance roller, 13 and 14 denote a pair of conveyance rollers, 15 denotes a paper discharge tray, 16 denotes a conveyance motor, and 100 denotes a lens.

The original placed on the original platen glass 1 is
The light is emitted by an illumination lamp 3 integrally formed with the mirror 2, and the reflected light is scanned by the first mirror 2 and the second and fourth mirrors 4 and 5 formed integrally. afterwards,
This reflected light is converted by the lens 100 into a photoelectric conversion element C
The light is focused on the CD 6 and photoelectrically converted by the CCD 6. The first mirror 2, the illumination lamp 3, the second mirror 4, and the third mirror 5 use the traveling body motor 7 as a drive source.
It is movable in the direction A shown in FIG.

The originals stacked on the original tray 8 include a pickup roller 9, a pair of registration rollers 10, and a transport drum 1.
1. The paper is sent to a pair of paper discharge rollers 13 and 14 via a reading position B shown in FIG.
The paper is discharged onto the paper discharge tray 15.

When the document passes the reading position B,
Irradiated by the illumination lamp 3 which has been moved and stopped near the reading position B, its reflected light is reflected by the first mirror 2 and
After being scanned by the second mirror 4 and the third mirror 5 integrally formed, the light is focused on the CCD 6 by the lens 100 and photoelectrically converted.

The pickup roller 9 and the pair of registration rollers 10 are driven by a paper feed motor (not shown), and convey a transport drum 11, a transport roller 12, and a pair of discharge rollers 13 and 14.
Is driven by the transport motor 16.

When reading both sides of the original, the first side of the original is read at the reading position B, and then the second side of the original is read by the unity type close-contact sensor 31 directed in the direction of the original carrying path. The paper is then fed to the paper discharge roller pairs 13 and 14 and discharged onto the paper discharge tray 15.

Next, the configuration and operation of the image processing unit of the present embodiment will be described with reference to FIG. In FIG. 2, SB
The U section 17 is a unit that reads image information on the first side of the document and converts it into a digital signal. The CCD 6 converts the image information into an analog signal having a voltage value corresponding to the light intensity. The U section 17 removes a dark potential portion from the analog signal. An AHP 19 and an A / D converter 21 for converting an analog signal into a digital signal are provided.

The SDU unit 23 includes a driver 24 for driving the traveling motor 7 and a lamp stabilizer 25 for controlling the lighting of the lamp 3. The SDU unit 23 travels based on a timing signal sent from the SCU unit 20. Drive the body.

The RCU unit 34 performs shading correction, gamma correction, MTF correction and the like on the digital signal input from the DRAM 37 for writing the back side video signal, the SBC 36 for controlling and controlling the DRAM 37, and the RSBU unit 30. Value processing, page synchronization signal,
This unit includes a SIP3 (35) or the like that outputs a video signal together with a line synchronization signal and a pixel clock, and is a unit that controls reading of the back side of the document when reading both sides of the document simultaneously.

The PSU unit 22 generates a DC voltage from a commercial power supply, and supplies power to each electrical component in the image reading apparatus via the MBU 18.

The ADU unit 44 includes an automatic document feeding mechanism (hereinafter, referred to as an automatic document feeding mechanism)
The power supply of electric components used in the ADF unit, and the drivers 42 and 43 of the paper feed motor 40 and the transport motor 41 are mounted to relay sensor signals of sensors mounted on the ADF.

The IEU unit 48 performs predetermined image processing on the video signal sent from the SCU unit 20, and returns the processed signal to the SCU unit 20.

The DCU unit 57 has a function of compressing the image data sent from the SCU unit 20.

The SCU unit 20 receives the signal converted by the SBU unit 17 into a video signal, performs shading correction, gamma correction, MTF correction, etc., and binarizes the video signal together with the page synchronization signal and line synchronization signal. , A DRAM 54 for writing a video signal read by the CCD 6 and subjected to image processing by the SIP 3 (45), an SBC 53 for controlling and controlling the DRAM 54, and communication and stepping with the host computer via the SCSI controller 59. A CPU 61 for controlling the drive timing of driving components such as a running body motor 7, a feed motor 40, and a transport motor 41, a ROM 62 storing control data, a RAM 63 for writing / reading information from a host computer,
It is composed of a plurality of selectors 46, 49, 50, 58 and the like.

Next, the signal processing operation according to the above configuration will be described. The reflected light from the document surface that has entered the CCD 6 on the SBU unit 17 is converted into an analog signal having a voltage value corresponding to the light intensity in the CCD 6. The analog signal is divided into odd bits and even bits and output from the CCD 6.
The analog signal has its dark potential removed by the AHP 19, the odd bits and the even bits are combined, and the gain is adjusted to a predetermined amplitude. The analog signal is input to the A / D converter 21 and converted into a digital signal by a predetermined reference voltage. Is converted.

The digitized image signal is supplied to the MBU unit 1
After shading correction, gamma correction, MTF correction, and the like are performed in the SIP 3 (45) on the SCU unit 20 via the SCU 8, the image is binarized and output as a video signal together with a page synchronization signal, a line synchronization signal, and a pixel clock. Is done.

The video signal output from the SIP 3 (45) is output to the IEU unit 48 via the connector 47. The video signal output to the IEU unit 48 is
The predetermined image processing is performed in the unit 48, and the SCU unit 20
Is input to

The video signal returned to the SCU unit 20 is input to the selector 46. The other input of the selector is a video signal output from the SIP3 (45), and has a configuration in which it is possible to select whether to perform image processing on the IEU unit 48 or not.

The output of the selector 46 is input to the selector 49. The video output signal from the selector 49 is connected to the selector 50 and the connector 51. The video output signal of the selector 50 is input to the SBC 53. After the above process, the video signal output from the SIP 3 (45) is input to the SBC 53 that manages the DRAM 54,
The image data including the IMM 55 is stored in an image memory composed of a DRAM.

The image information on the back side of the original is read by a 1: 1 close-contact sensor 31 placed at a predetermined position in the ADF.
After the gain is adjusted by the AHP 32 on the SBU unit 30, the signal is converted into a digital signal by the A / D converter 33 and output to the RCU unit 34. After that, after correction and the like are performed in the SIP 3 (35) on the RCU unit 34, the video signal passes through the MBU unit 18 as a backside video signal while using the image memory configured by the DRAM 37 and the SIMM 38 controlled and controlled by the SBC 36. Then, it is input to the selector 49 on the SCU unit 20.

The RCU unit 34 is a unit that controls reading of the back side of the original when reading both sides of the original at the same time. The RCU unit 34 is controlled by the CPU 61 in the SCU unit 20, and outputs the read back side image data as a video signal to the selector 49 in the SCU unit 20 via the MBU unit 18.

The output of the selector 46 is input to the selector 49. The other input of the selector 49 is the RCU unit 3
4 from which the user can select the original reading surface.

The video output signal from the selector 49 is connected to the selector 50 and the connector 51. The other input of the selector 50 is a video signal from the video adapter 52. With the above configuration, the connector 5
The connection of the video adapter 52 becomes possible beyond the first.

The image data stored in the image memory is output to the selector 58 and the connector 56. A DCU unit 57 is connected to the connector 56,
The DCU 57 has a function of compressing input image data.

The image data compressed on the DCU 57 is
This is the other input of the selector 58, and has a configuration in which it is possible to select whether to compress the image data or only to compress the image data.
The image data output from the selector 58 is sent to the host computer via the SCSI controller 59 and the connector 60.

CPU 61, ROM 6
2. A RAM 63 and the like are mounted, and communicate with a host computer via a SCSI controller 59.
Further, the CPU 61 also controls the drive timing of driving components such as the traveling body motor 7 as a stepping motor, the sheet feeding motor 40, and the transport motor 41.

A driver 24 for the traveling motor 7 and a lamp stabilizer 25 for controlling lighting of the lamp 3 are provided on the SDU unit 23.
Is installed.

The ADU unit 44 supplies electric power for electrical components used in the ADF unit, mounts the drivers (42 and 43) of the sheet feeding motor 40 and the transport motor 41, and also includes sensors such as sensors mounted on the ADF. Relay the signal. Also,
The SDU unit 23 and the ADU unit 44 have a function of driving the traveling body and the ADF based on the timing signal sent from the SCU unit 20.

The power supply control unit 64 (not shown) operates in accordance with the reading mode specified via the user interface.
The SDU unit 23, the SBU unit 17, etc., which are the first reading system, and the same size close contact sensor 31, R, which is the second reading system,
It has a function of controlling a power supply path to the CU unit 34 and the ADU unit 44.

The PSU unit 22 generates a DC voltage from a commercial power supply, and supplies power to each electrical component in the image reading apparatus via the MBU unit 18.

The same-size close-contact sensor 31 for reading the back side of the original includes a light source for irradiating light to the front side of the original, a lens array for converging light reflected from the original, and a sensor element array.

FIG. 3 is a block diagram schematically showing a document second surface reading unit in the image reading apparatus according to the present invention. In FIG. 3, reference numeral 31 denotes a unit-size contact sensor as a sensor element for reading image information on the second surface of the document. An LED array or a xenon tube is used for the lamp 315 as a light source, and the driving of the sensor chip and the lamp is performed by a driving unit 316. These are integrated as a module. In order to realize the high-speed driving of the unit-size close-contact sensor 31, one line of the sensor is divided into a plurality of blocks, and the sensor output of each block is output in parallel.

Reference numerals 301 to 304 denote analog signals output from the unity-type contact sensor, which perform predetermined gain adjustment, and further perform sample-and-hold with a predetermined clock.
MPs 33A to 33D are A / D converters for performing A / D conversion in accordance with a predetermined reference voltage, and 309 to 3
12 is a FIFO for storing digitized image data
(First-IN First-Out), 34 is F
An image correction / processing unit (RCU unit) 20 for performing image processing on image data output from the IFO, uses a DRAM 54 as an image memory on the first surface and a DRAM 37 as an image memory on the second surface as image memories. , A memory control unit (SCU unit 20) for controlling the transfer of the image data of the first side and the image data of the second side to the user interface alternately (in a sequential manner).

Next, an example of the operation according to the above configuration will be described. The analog signal on which image information is output, output from the unit-size contact sensor 31, is subjected to predetermined gain adjustment by AMPs (301 to 304), sampled and held by a predetermined clock, and then subjected to an A / D converter (33A). To 33D), A / D conversion is performed according to a predetermined reference voltage.

The digitized image data is transferred to the FIFO (309 to 31) at the same speed (5 MHz in this embodiment) as the analog signal output from the unity-type contact sensor 31.
2) is written. In addition, FIFO (309 to 31)
Reading from 2) is performed at a data rate of one line (5 MHz × 4 ch = 20 MHz in this embodiment).

In order to transfer the image data on both sides of the document in a sequential manner, the sensor output signals (video signals) obtained by outputting the sensor outputs of the respective blocks in parallel from the unit-size contact sensor 31 into one line (serialization). )There is a need to.

In the present embodiment, two FIFOs are prepared for each output channel of the unit-size contact sensor 31 and reading and writing are alternately performed, so that the speed conversion of image data and the 1
Line conversion (parallel-serial conversion) is performed.

The image data once converted into one line (in this embodiment, the data rate is 20 MHz) is input to the RCU unit 34 which is an image processing unit. In the present embodiment, the input of the RCU unit 34, which is an image processing unit, is divided into even-numbered pixels and odd-numbered pixels. Therefore, image data serialized in one line is parallelized to an even-odd pixel column.

The RCU 34, which is an image processing unit, performs shading correction, γ correction, etc.
37 and output to the SCU unit 20 as a memory control unit. The SCU unit 20 as the memory control unit uses the DRAM 54 as the image memory on the first surface side and the DRAM 37 as the image memory on the second surface side as image memories.
The SBC 36, which is a management control device of the DRAM 37, is controlled so that the image data on the surface side and the image data on the second surface are alternately (sequentially) transferred to the user interface.

When an image reading apparatus capable of reading a two-sided original is emphasized for downsizing using the unity-type contact sensor 31, the size of the entire apparatus is the same as that of a conventional image reading apparatus dedicated to single-sided reading. It is possible to make it equal to the device, but it has a reasonable scale as a circuit,
When a high throughput as an image reading device is required, the unity-type contact sensor 31 is further subdivided (5 ch).
Output or 6-channel output). Along with this, the configuration until the image data is converted into one line is also required for the number of output channels of the unity-type close contact sensor 31, so that the circuit size is further increased.

FIG. 4 is a diagram schematically illustrating a power supply control method of the image reading apparatus according to the present invention. SCU
When an operation mode instruction is received together with a document reading command from a user interface connected to the SCU 20, a signal for power control is transmitted to the power control unit 64 based on data stored in the ROM 62 on the SCU 20 in advance. When receiving the signal from the SCU 20, the power control unit 64 controls the ON / OFF combination of the switch 1 (101), the switch 2 (102), and the switch 3 (103) according to the content of the received signal, and via the user interface. Control to supply power only to the minimum required reading system to realize the requested operation mode.

For example, by realizing the ON / OFF combinations shown in Table 1 as combinations of the switch 1 (101), the switch 2 (102), and the switch 3 (103), the following reading modes can be realized. .

[0056]

[Table 1]

Table 1 shows that the switch 1 (101) and the switch 2 (10) when the double-sided reading mode is selected.
2) and switch 3 (103). In the case of the double-sided reading mode, one side of the document is read by the first reading optical system, and the other side is read by the second reading optical system.

In the present embodiment, the double-sided reading mode is configured to be realized by transporting a document carrying path formed in an automatic document feeder (ADF).
At this time, the first reading optical system uses the CCD 6 on the SBU unit 17 shown in FIG. 2 as a reading sensor, and the integrated lamp 3 and the first mirror 2 and the integrated second mirror 4 and the third mirror. The mirror 5 is fixed at a fixed position (near the reading position B). The second reading system includes a unit-size close-contact sensor 31 and an RSBU unit 30 which are placed on the document path of the ADF.

In the table, 〜 indicates a combination of the switch 1 (101), the switch 2 (102), and the switch 3 (103) when the mode for reading only one side of the document is selected. In the image reading apparatus of the present embodiment, three types of single-sided original reading methods are conceivable.

In the single-sided reading mode, an original is placed on the original platen glass 1, and the lamp 3, the first mirror 2, and the second
While scanning the mirror 4 and the third mirror 5, the reflected light is
This is a method of reading by the CCD 6 on the U section 17. At this time, the ADF and the second reading system including the RCU unit 34 are unnecessary, and the power supplied to them is substantially wasted, so that the switch 1 (101) and the switch 2 (102) Is turned off to cut off the power supply.

In the single-sided reading mode, a document is conveyed by an automatic document feeder (ADF) while the first reading system, that is, the lamp 3 and the first mirror 2 and the second mirror 4 and the third mirror 5 operate. These are fixed near the reading position B and read. At this time, the original is transported by ADU
Since the lighting of the lamp is performed by the SDU unit 23, the switch 2 (102) and the switch 3
Although (103) is kept in the ON state, the second reading system including the RCU unit 34 is not used, and when power is supplied, the power becomes substantially useless. The power supply is cut off by (101).

In the single-sided reading mode, image information is read by the second reading system, that is, the unity-type close contact sensor 31, while the document is being conveyed by the ADF. At this time, the driving of the automatic document feeder (ADF) is performed via the ADU unit 44, and the reading of the document is performed by the second reading system including the RCU unit 34. That is, since the SBU unit 17 and the SDU unit 23 for driving the ramp 3 and the traveling body motor 7 are not used, even if power is supplied to them, the power becomes substantially useless. The switch 3 (103) is turned off to cut off the power supply.

The switch 1 (1) is in the device standby state.
01), switch 2 (102), switch 3 (103)
The state of is shown. In the apparatus standby state, the first reading system, the second reading system, and the ADF are not operating, and when power is supplied to them, power is simply wasted. Therefore, when the apparatus is on standby, the switches 1 (101) and 2
(102), the switch 3 (103) is kept in the OFF state. The switch 1 (101) and the switch 2 (1
02), a switching element such as a transistor or a relay is used as the switch 3 (103).

The ADF incorporates sensor elements such as a document presence sensor and the like. If power is supplied to these sensor elements directly from the MBU 18 as shown in FIG. User is ADF
Since the CPU 61 can always detect whether or not a document is set in the apparatus, the CPU 61 can always detect this signal, so that the apparatus can smoothly transition from the standby mode to the operation mode.

[0065]

As is apparent from the above description, according to the image reading apparatus of the present invention, the first means for reading one side of the original and the second means for reading the other side of the original are provided. And a first control means for controlling power supply to these two means systems, and realizes the reading mode in accordance with a reading operation mode requested by a user via a user interface. Therefore, power can be supplied only to a reading means system necessary for the image reading, so that the power consumption of the image reading apparatus can be reduced as a whole, and it is possible to contribute to power saving.

Further, by supplying power only to the reading means system in accordance with the selected operation mode, it becomes possible to suppress power consumption to a minimum necessary for the apparatus, and to reduce unnecessary power from unnecessary portions. It is possible to mitigate the temperature rise inside the device due to power consumption, and it is possible to ensure the reliability of components (such as CCDs) that are particularly sensitive to temperature.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram illustrating an embodiment of an image reading apparatus of the present invention.

FIG. 2 is a block diagram illustrating a configuration and a connection relationship of a memory control unit and an image processing unit.

FIG. 3 is a block diagram schematically showing a document second surface reading unit.

FIG. 4 is a diagram for describing a power supply control method by a power supply control unit.

[Explanation of symbols]

 17 SBC 18 MBU 20 SCU 22 PSU 23 SDU 30 RSBU 31 Adhesion sensor 34 RCU 44 ADU 48 IEU 57 DCU 64 Power supply controller 309, 310, 311, 312 FIFO

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 1/40 H04N 1/40 101Z

Claims (3)

[Claims] 1. A light source irradiates light from a light source and irradiates a document to be read while operating in an operation mode designated via a user interface, and the reflected light or transmitted light is photoelectrically converted by a photoelectric conversion element. An image reading device provided with document reading means for extracting image information on the document as an electric signal, wherein the first reading means for reading one side of the document and the first reading means for reading the other side of the document; An image reading apparatus comprising: a second reading unit; and a first control unit that controls power supply to the two reading units. 2. A first image correcting means for correcting image data read by the first reading means, and a first storage means for storing the image data corrected by the first image correcting means. A second image correction unit that corrects the image data read by the second reading unit; a second storage unit that stores the image data corrected by the second image correction unit; A first power control unit that controls power supply to a first unit system including a first reading unit, the first image correction unit, and the first storage unit; the second reading unit; A second image correction unit, a second power supply control unit for controlling power supply to a second unit system including the second storage unit, and storage in the first storage unit and the second storage unit. Output of the image data And a second control unit that controls the image data stored in the first storage unit and the image data stored in the second storage unit. Controlling to transfer to the user interface in a frame-sequential manner, and the first control means controls the first power control means and the second power control means,
2. The image reading apparatus according to claim 1, wherein power supply to said first means system and said second means system is controlled. 3. The image reading apparatus according to claim 1, wherein the control operation setting of the first control unit is performed via the user interface.