JP2021010122A - Display unit and image reading device having the same mounted therein - Google Patents

Abstract

To prevent a user's wrong operation at the start-up of the device.SOLUTION: A display unit comprises: a control device that includes a first control unit and a second control unit; a screen display unit the display of which is controlled by the first control unit and the second control unit; and a control signal line to the screen display unit shared by the first control unit and the second control unit. The first control unit is operated by a program that starts up earlier than the second control unit. The second control unit executes control with lower immediacy than the first control unit. At the start-up of the control device from a dormant state, the first control unit acquires the right to use the control signal line after the start-up and executes initial screen display control for displaying an initial screen on the screen display unit, and the second control unit acquires, after the program is started up, the right to use the control signal line while the initial screen is displayed on the screen display unit and performs control of screen display of the screen display unit.SELECTED DRAWING: Figure 2

Description

The present invention relates to an image reading device that conveys a document and reads an image, and activation control in a display device mounted on the image reading device.

In recent years, as the image reading device and the document transporting device have become more sophisticated, as shown in Patent Document 1, the control unit has been divided (multi-core). For example, the functions are distributed by the control functions such as the control unit A that performs the document transport control and the control unit B that performs the communication control and the user interface function, and the processing speed is increased by performing the distributed control. Further, as for the operating system (hereinafter, OS) that operates in each control unit, for example, the control unit A often uses a real-time OS for embedded devices to control a function that requires real-time performance. On the other hand, the control unit B is not required to have real-time performance as much as the control unit A, such as communication control and user interface (screen display, etc.) control, but an OS for controlling high-performance functions, for example, a general-purpose OS is used. To. Since the OS used for the control unit B is generally highly functional, it is known that it takes longer to complete the startup than the real-time OS used for the control unit A.

JP-A-2018-139090

When the power of the device is started, the OS used for the control unit B, which controls the display of the display device such as the image reader, starts slowly, so the control unit B starts the display control of the display unit provided in the device. It takes time to do it. During that time, nothing is displayed on the display unit, so the user may suspect that the display unit has failed or the device has failed because no display is displayed on the display unit, and the power may be turned off even though the device is starting up. There was sex and so on.

In addition, if some data is written to the non-volatile memory during startup, the user suspects a failure and forcibly cuts off the power supply. For example, the power supply cable connected to the device. If you pull it out, the data stored in the memory will be destroyed in the worst case, and the device may not start or operate normally.

In view of the above, the display device according to the present invention is
A control device including a first control unit and a second control unit,
A screen display unit whose display is controlled by the first control unit and the second control unit,
A control signal line to the screen display unit shared by the first control unit and the second control unit is provided.
The first control unit operates with a program that starts faster than the second control unit.
The second control unit executes control that is less immediate than the first control unit.
When the control device is started from the hibernation state, the first control unit acquires the right to use the control signal line after the start and executes initial screen display control for displaying the initial screen on the screen display unit. And
After the program is started, the second control unit acquires the right to use the control signal line while the initial screen is displayed on the screen display unit, and controls the screen display of the screen display unit. It is characterized by.

According to the above means, the power of the device is turned off, or the device is started by returning from the power saving state, or the display is displayed on the screen display from an early stage immediately after the start of the recovery, and the device is started. You can notify the user that you are there. In addition, it is possible to shorten the startup time by efficiently and sequentially executing the necessary processes at the time of startup.

FIG. 3 is a partial cross-sectional view schematically showing a configuration of a document transporting device (image reading device) according to the first embodiment of the present invention. The block diagram of the control part of the image reading apparatus which concerns on 1st Embodiment of this invention. The front view of the discharge tray of the image reader A which concerns on 1st Embodiment of this invention in the unfolded state. A sequence chart at startup according to the first embodiment of the present invention. A sequence chart at startup according to the second embodiment of the present invention. A sequence chart at the time of activation according to the third embodiment of the present invention. The block diagram of the control part which concerns on 4th Embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are examples for carrying out the present invention, and the present invention is not limited to the following embodiments. It should be appropriately modified or changed depending on the configuration of the device in which the present invention is used and various conditions without departing from the spirit of the present invention.

[First Embodiment]
First, the document transfer device according to the first embodiment of the present invention will be described.

FIG. 1 is a cross-sectional view schematically showing the configuration of a document transporting device (image reading device) according to the first embodiment of the present invention.

<Device configuration>
The image reading device A is a device that transports one or a plurality of transport media S loaded on the mounting table 1 one by one into the device by a route RT, reads the image, and discharges the image to the discharge tray 2 as a loading member. Is. The transport medium S to be read is, for example, a sheet of OA paper, a check, a check, a business card, a card, or the like, and may be a thick sheet or a thin sheet. Examples of cards include insurance cards, driver's licenses, credit cards and the like. The transport medium S also includes a booklet such as a passport. When targeting a booklet, the holder 200 can be used. By accommodating the booklet in the spread state in the transparent holder 200 and placing it on the mounting table 1, the booklet is conveyed together with the holder 200 and the image can be read.

<Paper>
A first transport unit 10 is provided as a feed mechanism for feeding the transport medium S along the path RT. In the case of the present embodiment, the first transport unit 10 includes a feed roller 11 and a separation roller 12 arranged to face the feed roller 11, and sequentially transfers the transport media S on the mounting table 1 in the transport direction D1. Transport. The driving force is transmitted to the feed roller 11 from the drive unit 3 of the motor or the like via the transmission unit 5, and is rotationally driven in the direction of the arrow in the figure (the forward direction in which the transfer medium S is conveyed along the path RT). The transmission unit 5 is, for example, an electromagnetic clutch, and interrupts the driving force from the driving unit 3 to the feed roller 11.

<Drive>
The transmission unit 5 that connects the drive unit 3 and the feed roller 11 is, for example, in the present embodiment, in a state in which the drive force is transmitted in a normal state, and when the transport medium S is reversely fed or stopped, the drive force is applied. Cut off. When the transmission of the driving force is cut off by the transmission unit 5, the feed roller 11 is in a state where it can freely rotate. It should be noted that such a transmission unit 5 may not be provided when the feed roller 11 is driven in only one direction.

<Separation structure>
The separation roller 12 arranged to face the feed roller 11 is a roller for separating the transport media S one by one, and is in pressure contact with the feed roller 11 at a constant pressure. In order to secure this pressure contact state, the separation roller 12 is provided so as to be swingable and urged by the feed roller 11. The driving force is transmitted from the driving unit 3 via the torque limiter 12a, and the separation roller 12 is rotationally driven in the direction of the solid arrow (the direction opposite to the forward direction of the feed roller 11).

Since the torque limiter 12a regulates the transmission of the driving force, the separation roller 12 rotates in the direction (in the direction of the broken arrow arrow) that accompanies the feed roller 11 when it is in contact with the feed roller 11. As a result, when a plurality of transport media S are transported to the pressure contact portion between the feed roller 11 and the separation roller 12, two or more transport media S are dammed so as not to be transported downstream, leaving one. ..

In the present embodiment, the separation roller 12 and the feed roller 11 form a separation mechanism, but such a separation mechanism does not necessarily have to be provided, and the transport media S are sequentially fed to the path RT one by one. Any feeding mechanism may be used. Further, when the separation mechanism is provided, instead of the configuration like the separation roller 12, a separation pad that applies a frictional force to the transport medium S is pressed against the feed roller 11 to have the same separation action. You may.

<Transport structure>
The second transport unit 20 as a transport mechanism on the downstream side of the first transport unit 10 in the transport direction includes a drive roller 21 and a driven roller 22 driven by the drive roller 21, and has been transported from the first transport unit 10. The transport medium S is transported to the downstream side thereof. A driving force is transmitted to the driving roller 21 from a driving unit 4 such as a motor, and is rotationally driven in the direction of the arrow in the drawing. The driven roller 22 is pressed against the drive roller 21 at a constant pressure and is brought around to the drive roller 21. The driven roller 22 may be urged with respect to the drive roller 21 by an urging unit (not shown) such as a spring.

The third transport unit 30 located downstream of the second transport unit 20 in the transport direction includes a drive roller 31 and a driven roller 32 driven by the drive roller 31, and has been transported from the second transport unit 20. The transport medium S is transported to the discharge tray 2. That is, the third transport unit 30 functions as a discharge mechanism.

A driving force is transmitted to the driving roller 31 from a driving unit 4 such as a motor, and is rotationally driven in the direction of the arrow in the drawing. The driven roller 32 is pressed against the drive roller 31 at a constant pressure and is brought around to the drive roller 31. The driven roller 32 may be urged with respect to the drive roller 31 by an urging unit (not shown) such as a spring.

The discharge tray 2 on which the documents are loaded is pivotally supported via a first hinge 101 provided below the image reading device A so as to be rotatable with respect to the image reading device A. Further, it is composed of a first discharge tray 2a on the first hinge 101 side, a first extension tray 2b connected to the tip end side thereof, a second extension tray 2c, and a third extension tray 2d. The first extension tray 2b is slidably supported with respect to the first discharge tray 2a, and the second extension tray 2c is slidably supported with respect to the first extension tray 2b. The third extension tray 2d is slidably supported with respect to the second extension tray 2c so that it can be stored.

<Image reading structure, control>
Here, in the image reading device A of the present embodiment, the image is read by the image reading unit 70, which is an image reading unit arranged between the second transport unit 20 and the third transport unit 30, so that the second image is read. The transport unit 20 and the third transport unit 30 transport the transport medium S at a constant speed. By always setting the transport speed to be equal to or higher than the transport speed of the first transport unit 10, it is possible to reliably avoid a situation in which the succeeding transport medium S catches up with the preceding transport medium S. For example, in the present embodiment, the speed of the transport medium S by the second transport unit 20 and the third transport unit 30 is controlled so as to be faster than the transport speed of the transport medium S by the first transport unit 10. did.

Even when the transport speed of the transport medium S by the second transport unit 20 and the third transport unit 30 and the transport speed of the transport medium S by the first transport unit 10 are the same conditions, the drive unit 3 is controlled. It is also possible to form a minimum distance between the preceding transport medium S and the succeeding transport medium S by intermittently shifting the feed start timing of the succeeding transport medium S.

<Double feed detection>
When the double feed detection sensor 40 arranged between the first transport unit 10 and the second transport unit 20 has the transport media S such as paper in close contact with each other due to static electricity or the like and has passed through the first transport unit 10 ( That is, it is an example of a detection sensor (sensor that detects the behavior and state of the sheet) for detecting this in the case of a double feed state in which the sheets are carried in an overlapping manner. Various types of double feed detection sensors 40 can be used, but in the case of the present embodiment, the ultrasonic sensor is provided with an ultrasonic wave transmitting unit 41 and its receiving unit 42, and is a transport medium such as paper. The double feed is detected on the principle that the amount of attenuation of the ultrasonic waves passing through the transport medium S is different depending on whether the S is double-fed and one by one.

<Resist sensor>
The medium detection sensor 50 arranged on the downstream side in the transport direction from the double feed detection sensor 40 is on the upstream side of the second transport unit 20 and on the downstream side of the first transport unit 10. This is an example as an upstream detection sensor (sensor that detects the behavior and state of the sheet), and is transported to the position of the transport medium S transported by the first transport unit 10, specifically, to the detection position of the medium detection sensor 50. Detects whether the end of the medium S has reached or passed. Various media detection sensors 50 can be used, but in the case of the present embodiment, the medium detection sensor 50 is an optical sensor, includes a light emitting unit 51 and a light receiving unit 52 thereof, and receives light when the transport medium S reaches or passes through. The transport medium S is detected on the principle that the intensity (light receiving amount) changes.

In the case of the present embodiment, when the tip of the transport medium S is detected by the medium detection sensor 50, the transport medium S has reached a position where double feed can be detected by the double feed detection sensor 40. The medium detection sensor 50 is provided on the downstream side in the vicinity of the double feed detection sensor 40. The medium detection sensor 50 is not limited to the above optical sensor, and for example, a sensor (image sensor or the like) capable of detecting the end of the transport medium S may be used, or a lever type sensor protruding from the path RT may be used. It may be a sensor. Further, a plurality of media may be provided in a direction orthogonal to the transport direction to detect that the medium is skewed with respect to the transport path.

A medium detection sensor 60 different from the medium detection sensor 50 is arranged on the upstream side of the image reading unit 70. This is an example of a detection sensor on the downstream side arranged on the downstream side of the second transport unit 20, and detects the position of the transport medium S transported by the second transport unit 20. Various media detection sensors 60 can be used, but in the case of the present embodiment, the medium detection sensor 60 is an optical sensor similar to the medium detection sensor 50, and includes a light emitting unit 61 and a light receiving unit 62, and of the transport medium S. The transport medium S is detected on the principle that the light receiving intensity (light receiving amount) changes depending on the arrival or passage. In the present embodiment, the medium detection sensors 50 and 60 are arranged on the upstream side and the downstream side of the second transport unit 20 in the transport direction, respectively, but only one of them may be used.

<Arrangement of CIS>
The image reading unit 70 located downstream of the medium detection sensor 60, for example, optically scans, converts it into an electric signal, and reads it as image data. Inside, a light source such as an LED, an image sensor, and a lens array. Etc. are provided. The image reading unit 70 is a contact image sensor (CIS) unit. Here, the image reading unit 70 is a CIS unit, but for example, it may be a unit using a CCD as an image sensor, and the type of the image sensor is not limited. In the case of the present embodiment, one image reading unit 70 (hereinafter, synonymous with CIS) is arranged on each side of the path RT (70a, 70b), and the front and back surfaces of the transport medium S are read. However, one may be arranged only on one side of the path RT, and only one side of the transport medium S may be read. Further, in the present embodiment, the image reading units 70 are arranged to face each other on both sides of the path RT, but for example, they may be arranged at intervals in the direction of the path RT.

<Explanation of block diagram>
The control unit 80 will be described with reference to FIG. FIG. 2 is a block diagram of the control unit 80 of the image reading device A.

The control unit 80 is composed of two control units, a control unit (a) 80a and a control unit (b) 80b, an interface unit (c) 85c, and an operation unit 83. The control unit (a) 80a includes a CPU (a) 81a, a storage unit (a) 82a, a communication unit (a) 84a, and an interface unit (a) 85a. The control unit (b) 80b includes a CPU (b) 81b, a storage unit (b) 82b, a communication unit (b) 84b, and an interface unit (b) 85b. By executing the program stored in the storage unit (a) 82a, the CPU (a) 81a controls the reading control of the image reading device A and the functions required for immediacy such as the transfer of the medium. On the other hand, the CPU (b) 81b controls the connection of the communication unit (b) 84b and the operation unit 83 by executing the program stored in the storage unit (b) 82b. It controls functions that do not require immediacy compared to reading control and media transfer control.

The storage unit (a) 82a is composed of, for example, a non-volatile memory, a volatile memory, or the like, and is connected to the CPU (a). The storage unit (b) 82b is composed of, for example, a non-volatile memory, a volatile memory, or the like, and is connected to the CPU (b) 81b. The operation unit 83 is composed of, for example, a switch 83c as an operation unit, a touch panel 83a, a display device 83b as a screen display unit, and the like, and displays information to the operator and accepts operations from the operator.

The CPU (a) 81a uses a real-time OS for embedded devices represented by ITRON (registered trademark) or the like in order to perform highly immediate transfer control and read control. The real-time OS is optimized for the image reader A, and is characterized in that it takes a very short time to start up and can be controlled with high immediacy. The real-time OS and its application are stored in the non-volatile memory of the storage unit (a) 82a, are expanded on the volatile memory during operation, the access time at the time of execution is shortened, and the functions are executed at high speed. On the other hand, the CPU (b) 81b is not required to be immediate, but a general-purpose OS represented by Linux (registered trademark) or the like is used in order to implement a high-performance network communication function and screen drawing function. Since the general-purpose OS is not optimized for the image reader A but is generalized, its startup time is significantly longer than that of the above-mentioned real-time OS. As an example, a real-time OS can be started in a few seconds, but a general-purpose OS requires a dozen to a few tens of seconds. The general-purpose OS and its applications are stored in the non-volatile memory of the storage unit (b) 82b, and are expanded and executed on the volatile memory during operation.

The communication unit (a) 84a is an interface for performing information communication with an external device connected to the CPU (a) 81a. When a PC (personal computer) is assumed as the external device, examples of the communication unit (a) 84a include a USB interface and a SCSI interface. The communication unit (b) 84b is an interface for performing information communication with an external device connected to the CPU (b) 81b, and may be used as a network interface for wired communication represented by a LAN, a wireless LAN, or Bluetooth (registered trademark). The interface of typical wireless communication can be raised. Any of the communication units 84a and 84b may be provided with a plurality of communication interfaces. Further, either the communication unit (a) 84a or the communication unit (b) 84b may not be included.

The communication unit (c) 84c is an input / output interface that communicates with each other between the CPU (a) 81a and the CPU (b) 81b. This input / output interface is a control signal between the CPU (a) 81a and the CPU (b) 81b, for example, a signal line for prompting the startup of the CPU (b) 81b, and the CPU (a) 81a and the CPU (b) 81b. It is a communication system using a shared memory (not shown). Further, as an example of the communication unit (c) 84c, a simple general-purpose IO port communication or a serial communication function may be used.

The interface unit (a) 85a is an I / O interface connected to the CPU (a) 81a that inputs / outputs data to / from the actuator 86 and the sensor 87. The actuator 86 includes a drive unit 3, a drive unit 4, a transmission unit 5, and the like. The sensor 87 includes a double feed detection sensor 40, medium detection sensors 50 and 60, an image reading unit 70, and the like. The interface unit (b) 85b is connected to the CPU (b) 81b and inputs / outputs data to / from the touch panel 83a of the operation unit 83. The interface unit (c) 85c is connected to the CPU (a) 81a and the CPU (b) 81b, and is used exclusively from each of them. The interface unit (c) 85c is, for example, a control interface connected to the display device 83b of the operation unit 83.

<Display panel configuration>
FIG. 3 is a front view of the discharge tray 2 of the image reading device A according to the present embodiment in an unfolded state. More precisely, it is a view seen from a direction perpendicular to the front panel 90 provided inclined to the front side of the image reading device A, and is viewed from slightly above the front surface in the state where the device is mounted. It is a diagram of the state.

A display panel 93 is provided on the front panel 90 at the upper part of the front surface, and a power button 122 and a display unit 94, which are an example of the switch 83c as an example of the operation unit 83, are provided inside the display panel 93. Here, the display unit 94 is composed of a touch panel 83a, a display device 83b, and the like.

The display device 83b is, for example, a liquid crystal display or the like, and can display a screen according to the state of the device and can provide device information to the user. Examples of the displayed screen include a start key for starting the operation of the image reading device A, a reading operation registered in the image reading device A in advance (for example, the reading resolution, the output method of the read image data, the output destination, etc.). ) Is a screen consisting of a list of jobs to specify. In addition, an icon or the like indicating the state of the device may also be displayed.

The display device 83b has a built-in control IC (not shown). This control IC controls the display of the display device 83b. The CPU (a) 81a or the CPU (b) 81b sets the resolution and the number of colors of the display device 83b on the control IC by using an interface such as the interface unit (c) 85c described later, and also sets the display device 83b. Send the display image data to be displayed on. The control IC controls the display with the instructed content based on the received display image data. Here, an example of transmitting the display image data to be displayed on the display device 83b to the control IC and displaying the data has been described, but another display control may be used. For example, an image in which the CPU (a) 81a or the CPU (b) 81b transmits a display command to the control IC via an interface and the received control IC is stored inside the control IC or in a storage area connected to the control IC. A display control method that displays a combination of data may be used.

Here, the control interface from the CPU 81a or 81b to the control IC built in the display device 83b is the interface unit (c) 85c built in the control unit 80. Here, the display I / F is used. This display I / F is a control interface shared by the CPU (a) 81a and the CPU (b) 81b, and specifically has a control signal line of the display device 83b. That is, the CPU (a) 81a and the CPU (b) 81b cannot use the display I / F at the same time, and the usage right is exclusively given. As the display I / F, for example, SPI, USB interface, eDP, HDMI (registered trademark) and the like can be considered.

<Startup method>
FIG. 4 is a sequence chart showing a sequence at startup after pressing the power button 122 of the image reading device A. It should be noted that this sequence chart shows the relative sequence relationship, not the absolute time relationship.

When the user presses the power button 122 in the hibernation state, the image reading device A turns on the power (S100) and starts starting. The CPU (a) 81a and the CPU (b) 81b read and execute a program including the OS from the non-volatile memories of the storage unit (a) 82a and the storage unit (b) 82b, respectively (S101, S102). At this time, even if the program is executed directly from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and the program on the volatile memory is executed, or some programs are executed from the non-volatile memory. It may be expanded on the volatile memory, the program on the volatile memory may be executed, and the program not on the volatile memory may be executed from the non-volatile memory.

Here, the CPU (a) 81a and the CPU (b) 81b start booting the OS after the initial hardware settings (S103, S104), respectively (S105, S106). Here, as described above, the CPU (a) 81a uses a real-time OS having a short startup time, while the CPU (b) 81b uses a general-purpose OS having a long startup time. Therefore, the CPU (a) 81a first completes the booting of the OS (S107).

Next, the CPU (a) 81a acquires the right to use the display I / F (S108). The display I / F is shared by the CPU (a) 81a and the CPU (b) 81b, but the right to use the display I / F in the initial state is assigned to the CPU (a) 81a, and this At this point, the CPU (b) 81b has not started the OS and is not controlling to acquire the right to use the display I / F, so that the display I / F can be exclusively used by the CPU (a) 81a. ..

Subsequently, the CPU (a) 81a starts applying power to the display device 83b (S109). As a result, the display device 83b is energized (S110). The CPU (a) 81a displays on the display device 83b by using the display I / F (not shown) included in the interface unit (c) 85c with respect to the control IC (not shown) built in the display device 83b. Sends initial settings such as resolution and color number settings.

The CPU (a) 81a also supplies power to the backlight of the display device 83b. In the present embodiment, only the CPU (a) 81a is configured to control the power supply to the display device 83b and the backlight. The display control on the display device 83b and the brightness control of the backlight are performed by either the CPU (a) 81a or the CPU (b) 81b, which has acquired the right to use the display I / F.

Subsequently, the image data information to be displayed on the initial screen for the initial screen display is transmitted to the control IC (not shown) using the display I / F (not shown), and the initial screen is displayed on the display device 83b. The initial screen display control (S111) is performed as described above. As a result, the initial screen is displayed on the display device 83b (S112), and the user can recognize that the image reading device A is being activated.

Next, since the CPU (a) 81a does not need to control the display unit by completing the initial screen display control, the right to use the display I / F is released (S113). Further, the CPU (a) 81a may continue to own the right to use the display I / F, and the display content of the initial screen is set to, for example, an animation display, and the startup process is in progress by updating the screen. It is also possible to notify the user. On the other hand, the CPU (b) 81b is still booting the OS at this point.

Next, the CPU (a) 81a starts the initialization process of the connected control device. First, the control devices connected to the communication unit (a) 84a, the communication unit (c) 84c, the interface unit (a) 85a, and the interface unit (a) 85a, such as the actuator 86 and the sensor 87, are initialized (S114). ). Specifically, the CPU (a) 81a initializes the USB interface or SCSI interface or the wired / wireless network interface, which is the communication unit (a) 84a, to enable communication. Next, the actuator 86 and the sensor 87 connected to the interface portion (a) 85a are initialized. Here, the initialization of the actuator 86 is a movement control of the drive units 3 and 4 to the initial position and the like. Further, the initialization operation of the sensor 87 is the adjustment of the amount of emitted light of the medium detection sensors 50 and 60, and if necessary, the ultrasonic wave transmitting unit and the receiving unit of the double feed detection sensor 40 may be adjusted.

Next, the CPU (a) 81a adjusts the amount of emitted light (S115) of the image reading units (here, the CIS unit) 70a and 70b. Following the adjustment of the amount of emitted light, the color reference plate (not shown) provided on the opposite surface of the reading position of each CIS unit 70a and 70b is read, and shading correction is performed to correct the output at that time to a predetermined value (S116). ). Here, the color reference plate may be arranged in advance on the facing surface, or may advance to the facing surface at the time of shading correction. Further, the CIS units 70a and 70b may be moved to the positions facing the color reference plates by using the drive unit.

On the other hand, the CPU (b) 81b completes the OS startup during or after the initialization process (S114, S115, S116) of the control device of the CPU (a) 81a (S117). Next, the CPU (b) 81b acquires the right to use the display I / F on the display device 83b through arbitration for display control on the display device 83b (S118). In other words, during the startup process of the CPU (b) 81b, the CPU (a) 81a completes the initialization process of the control device and the image reading unit used for image reading.

Here, the CPU (a) 81a mediates the right to use the display I / F. The CPU (a) 81a manages the usage right of the display I / F, and when the usage right of the display I / F is released, if there is a request for the usage right from either the CPU 81a or 81b, the requested CPU Pass the usage right to.

On the contrary, when the CPU (a) 81a has acquired the right to use the display I / F and the CPU (b) 81b requests the right to use the display I / F using the communication unit (c), the CPU ( a) 81a mediates. The arbitration is executed by suspending the use of the display I / F of the CPU (a) 81a and preferentially passing the right to use the display I / F to the CPU (b) 81b.

Here, the arbitration is performed by the CPU (a) 81a, but the arbitration may be performed by the CPU (b) 81b, or another arbitration unit (not shown) may perform the arbitration. Is not particularly limited. Further, here, an example in which the use of the display I / F of the CPU (a) 81a is interrupted and the usage right is preferentially passed to the CPU (b) 81b is shown, but the display I / F of the CPU (a) 81a The right to use the display I / F may be passed to the CPU (b) 81b after waiting for the end of use, and the mediation method is not limited. In addition, the right to use the display I / F may be granted or denied access to the interface part (c) 85c at the hardware level, or the right to use may be secured according to the rules predetermined at the software level. You may release it.

Here, it is confirmed that the CPU (a) 81a releases the usage right of the display I / F after the completion of the initial screen display control, and the usage right is acquired. At this time, since it is decisive in the control sequence that the CPU (a) 81a releases the right to use the display I / F, the right to use the display I / F is directly acquired. Here, if the CPU (a) 81a holds the right to use the display I / F (when the CPU (a) 81a continues to update the screen as described above), as described above. Using the communication unit (c), the CPU (b) 81b requests the CPU (a) 81a to use the display I / F, and the CPU (a) 81a mediates the right to use the display I / F. The CPU (a) 81a may transfer the usage right to the CPU (b) 81b, and the CPU (b) 81b may acquire the usage right of the display I / F.

After acquiring the right to use the display I / F, the CPU (b) 81b starts the screen display control on the display device 83b (S119). As a result, the screen display of the display device 83b is executed according to the instruction from the CPU (b) 81b (S120). At this time, the screen display control may be started after the control IC included in the display device 83b is initialized again. After that, the CPU (b) 81b controls the screen display on behalf of the CPU (a) 81a, and causes the display device 83b to execute the necessary screen display as needed.

The CPU (b) 81b subsequently initializes the uninitialized control devices such as the communication unit (b) 84b and the interface unit (b) 85b (S121). Here, as the communication unit (b), a wired / wireless network communication unit or the like can be considered. Further, as the interface unit (b) 85b, a control interface of the touch panel 83a included in the operation unit 83 or the like can be considered. These initializations are completed and the startup is completed.

<Display device>
After starting the device, the control unit (b) 80b controls the touch panel 83a and the display device 83b. As described above, the CPU (b) 81b in the control unit (b) 80b holds the right to use the display I / F to the display device 83b and controls the display screen. At this time, information that the user touches the screen is also acquired from the touch panel 83a, and screen display processing and device control processing are performed according to the acquired information.

<Drive by receiving start instruction from PC>
The basic operation of the image reader A will be described. When the control unit (a) 80a receives an image reading start instruction from, for example, an external personal computer to which the image reading device A is connected, the control unit (a) 80a starts driving the first to third transport units 10 to 30. The transport media S loaded on the mounting table 1 are transported one by one from the transport medium S located at the bottom thereof. Here, the connection with the external personal computer may be made by using the communication unit (a) 84a included in the control unit (a) 80a, for example, a USB interface or a SCSI interface, and is also included in the control unit (b) 80b. It may be done by using the communication unit (b) 84b, for example, a LAN or a wireless LAN interface. Here, when the connection with the external personal computer is made by using the communication unit (b) 84b included in the control unit (b) 80b, the connection with the external personal computer is made to the control unit (b) 80b in the image reading device A. The included CPU (b) 81b performs this. The CPU (b) 81b uses the communication unit (c) 84c to transfer the content of communication with the external personal computer to the CPU (a) 81a in the control unit (a) 80a. The image reading operation is started when the image reading start instruction from the external personal computer is finally passed to the CPU (a) 81a. In the present embodiment, the CPU (a) 81a controls the image reading unit 70 to read the image, and the image reading is executed.

<Drive by receiving start instruction from device operation>
Further, instead of the instruction to start reading from the external personal computer, the image reading operation is started by receiving the image reading instruction by the start key (not shown) provided in the operation unit 83 of the image reading device A or the input from the touch panel 83a. You may.

<Control during double feed>
By the image reading operation, the transport medium S is determined by the double feed detection sensor 40 during the transfer, and if it is determined that there is no double feed, the transfer is continued. If it is determined that there is double feed, the transport is stopped, or the capture of the subsequent transport medium S by the first transport unit 10 is stopped, and the transport medium S in the double feed state is discharged as it is. It may be. Further, an external personal computer or a display device 83b inside the device may be displayed to notify that double feeding has occurred. Further, at this time, at the same time, the return processing, for example, the image reading operation is continued, or the read data of the double-fed transport medium S is discarded and the image reading data including the double-fed transport medium S is not acquired. The user may be allowed to select from the operation unit 83 or the like, such as executing from reading S.

<Start reading according to the output of the resist sensor and send / save the scanned image>
The control unit (a) 80a starts reading an image of the transport medium S transported by the second transport unit 20 by the image reading unit 70 at a timing based on the detection result of the medium detection sensor 60, and the scanned image. Is temporarily stored and sequentially transmitted to the outside of the device. The primary stored image data is transmitted to a connected external personal computer or network device via either the communication unit (a) 84a or the communication unit (b) 84b. Here, the external personal computer may save the received scanned image after displaying it, or the external personal computer may directly save the received scanned image in a predetermined location. Further, it may be stored in a predetermined location such as a device on the network, for example, an external storage device or an FTP server directly connected to the network.

The transport medium S from which the image has been read is discharged to the discharge tray 2 by the third transport unit 30, and the image reading process of the transport medium S is completed. The discharge tray 2 is an example of a document placing table.

<Power off operation>
The image reading device A starts the power-off operation when the user presses the power button 122 and keeps the pressed state for 2 seconds or longer. The time for which the user continues to press the power button 122 is not limited to 2 seconds, and may be, for example, 1.5 seconds or 3 seconds.

A signal indicating the state of the power button 122 is input to the CPU (a) 81a via the interface unit (a) 85a. The CPU (a) 81a monitors the state of the power button 122 with this signal, and when the user recognizes that the power button 122 is pressed for 2 seconds or longer, the power off operation is started. As a power-off operation, the CPU (a) 81a instructs the CPU (b) 81b to perform the termination process via the communication unit (c) 84c. The CPU (a) 81a writes necessary information to the non-volatile memory connected to the storage unit (a) 82a, and waits for the completion. At the same time, the communication of the communication unit (a) 84a is terminated, the actuator 86 connected to the interface unit (a) 85a is safely stopped, and the display device 83b is generated by the general-purpose output connected to the interface unit (a) 85a. Stop applying power to the interface.

On the other hand, the CPU (b) 81b instructed to perform the termination process writes the information necessary for the non-volatile memory of the storage unit (b) 82b, and stops the communication unit (b) 84b, the interface unit 85b, and the like. carry out. When the stop processing is completed, the end processing completion notification is transmitted to the CPU (a) 81a via the communication unit (c) 84c. At this time, the CPU (a) 81a periodically sends the end processing completion confirmation to the CPU (b) 81b via the communication unit (c) 84c, and the CPU (b) 81b receives the end processing completion notification to complete the end. -You may send the incomplete status. If the CPU (a) 81a receives the end processing completion notification from the CPU (b) 81b and its own end processing is completed, it controls the power supply control signal connected to the interface (a) 85a and controls the entire device. By stopping the power supply to the image reader, the power of the image reader is turned off.

<Transition to power saving mode>
The image reader A shifts to the power saving mode in order to reduce the power consumption of the entire device when the user or the external control device does not give an instruction for a certain period of time or when there is an instruction to shift to the power saving mode. To do. When the CPU (a) 81a is not operated by the user for a certain period of time, or when a condition for shifting to the power saving mode occurs such as receiving an instruction to shift to the power saving mode by an instruction from the user, the CPU (b) ) 81b is instructed to transition to the power saving mode via the communication unit (c) 84c. Upon receiving the instruction, the CPU (b) 81b stops the control of the interface unit (b) 85b and the communication unit (b) 84b. Further, the control of the touch panel 83a and the display device 83b is also stopped via the interface unit (c) 85c. At this time, the CPU (a) 81a is notified that the right to use the display I / F is released via the communication unit (c) 84c when the control to the display device 83b is stopped. After that, the CPU (b) 81b is suspended.

On the other hand, when the CPU (a) 81a instructs the CPU (b) 81b to make a power saving mode transition, a part of the actuator 86 or the sensor 87 connected to the interface unit (a) 85a, for example, the image reading units 70a and 70b. To stop. Next, when a notification is received from the CPU (b) 81b via the communication unit (c) 84c to notify the release of the right to use the display I / F, the right to use the display I / F is secured. The CPU (a) 81a, which has secured the right to use the display I / F, controls the display device 83b so as to display a display different from the normal operation screen, such as displaying "sleeping". Notify the user that the device is in power saving mode. Further, in the power saving mode, the CPU (a) 81a may be operated at a slower operating clock than in the normal operation to further reduce the power consumption.

<Operation in power saving mode>
During the power saving mode, the CPU (a) 81a monitors changes in the switch 83c and the sensor 87 connected to the operation unit 83. Further, the instruction from the external control device connected to the communication unit (a) 84a may be monitored. The CPU (a) 81a performs only these minimum operations. On the other hand, the CPU (b) 81b is in the suspended state as described above.

<Return from power saving mode>
When the CPU (a) 81a detects a condition for returning from the power saving mode, for example, that the user presses the switch 83c, the CPU (a) 81a starts returning from the power saving mode. The CPU (a) 81a raises the operating clock dropped during the power saving mode to the operating clock during normal operation. Next, a return instruction is transmitted to the CPU (b) 81b via the communication unit (c) 84c. Here, in order to notify the user that the recovery from the power saving mode is being performed, for example, by causing the display device 83b to display "returning" via the display I / F before transmitting the return instruction. Display control may be performed. Next, the CPU (a) 81a releases the right to use the display I / F, and initializes the communication unit (a) 84a, the interface unit (a) 85a, etc., which are stopped when transitioning to the power saving mode. To make it controllable again. Next, CIS light intensity adjustment and shading correction are performed.

On the other hand, when the CPU (b) 81b receives the return instruction via the communication unit (c), it acquires the right to use the display I / F on the display device 83b for display control on the display device 83b. Here, the CPU (a) 81a is requested to use the display I / F via the communication unit (c) 84c, and the CPU (a) 81a permits it, so that the CPU (b) 81b can be used. Acquire the right to use the display I / F. At this time, if it is decisive in the control sequence that the CPU (a) 81a releases the right to use the display I / F, the right to use the display I / F is transferred via the communication unit (c) 84c. You may get it directly without communication.

After acquiring the right to use the display I / F, the CPU (b) 81b starts the screen display control on the display device 83b. As a result, the screen display of the display device 83b is executed according to the instruction from the CPU (b) 81b. At this time, the screen display control may be started after the control IC included in the display device 83b is initialized again. After that, the CPU (b) 81b controls the screen display on behalf of the CPU (a) 81a, and causes the display device 83b to execute the necessary screen display as needed.

Next, the CPU (b) 81b initializes the control device, for example, the communication unit (b) 84b and the interface unit (b) 85b, whose control is stopped at the transition to the power saving mode. Here, as the communication unit (b), a wired / wireless network communication unit or the like can be considered. Further, as the interface unit (b) 85b, a control interface of the touch panel 83a included in the operation unit 83 or the like can be considered. When these are completed, the power saving mode is restored. In the return control of the CPU (b) 81b, the control device whose control is stopped at the transition to the power saving mode may be initialized prior to the acquisition of the right to use the display I / F.

According to the configuration of the present embodiment, it is possible to display on the display unit without waiting for the start of the control unit (control unit (b) 80b) that controls the display when the device is operated, and the user is informed that the display is in progress. Since the notification can be made, it is possible to prevent the user from suspecting a failure of the device and accidentally turning off the power of the device.

<Second embodiment>
Next, the image reading device according to the second embodiment will be described. Since the basic configuration of the device is the same as that of the first embodiment, only the different parts will be described.

In this embodiment, the method of starting the image reading device A is different from that of the first embodiment. FIG. 5 is a sequence chart showing a sequence at the time of starting the image reading device A in the second embodiment. It should be noted that this sequence chart shows the relative sequence relationship, not the absolute time. The basic configuration of the control unit is the same as that of the first embodiment.

<Startup operation>
When the user presses the power button 122 (S200), the image reading device A turns on the power and starts starting. At this time, the CPU (a) 81a is reset-released (S200a) and starts operation. The CPU (a) 81a reads and executes a program including the OS from the non-volatile memory of the storage unit (a) 82a (S201). At this time, even if the program is executed from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and executed on the volatile memory, and some programs are executed from the non-volatile memory on the volatile memory. You may expand to and execute the program on the volatile memory, and expand the program that is not on the volatile memory directly from the non-volatile memory or on the volatile memory and execute it. At this time, the CPU (b) 81b is in a state in which the reset state is maintained and the operation has not started (S202). A reset signal is input to the CPU (b) 81b from the outside in order to keep the CPU (b) 81b in the reset state. The reset signal input to the CPU (b) 81b is sent using a part of the communication unit (c) 84c, and an example of the communication unit (c) 84c is a general-purpose IO port connected to the CPU (a) 81a. Is.

The CPU (a) 81a starts the OS (S204) after the initial setting of the hardware (S203). Next, when the OS has completed booting (S205), the right to use the display I / F of the display device 83b is acquired (S206). At this point, the CPU (b) 81b is not started and it is impossible to acquire the right to use the display I / F. Therefore, the CPU (a) 81a exclusively displays the display I / F without the need for arbitration. You can get the right to use.

Next, the CPU (a) 81a starts applying a power source to the display device 83b (S207). As a result, the display device 83b is energized (S208). The CPU (a) 81a displays on the display device 83b by using the display I / F (not shown) included in the interface unit (c) 85c with respect to the control IC (not shown) built in the display device 83b. Sends initial settings such as resolution and color number settings. Subsequently, the display image data information to be displayed on the initial screen for the initial screen display is transmitted to the control IC (not shown) using the display I / F (not shown), and the initial screen is displayed on the display device 83b. The initial screen display control (S209) is performed so as to be performed. As a result, the initial screen is displayed on the display device 83b (S210), and the user can recognize that the image reading device A is being activated. Next, the CPU (a) 81a releases the right to use the display I / F by performing the initial screen display control (S211). After that, the CPU (a) 81a does not request the right to use the display I / F during startup.

Next, the CPU (a) 81a controls a general-purpose IO port that is a part of the communication unit (c) 84c, and performs a start instruction control for transmitting a start start instruction for releasing the reset state of the CPU (b) 81b ( S212). Subsequently, the CPU (a) 81a starts the initialization process of the control device. First, the control devices (actuator 86, sensor 87) connected to the communication unit (a) 84a, the communication unit (c) 84c, the interface unit (a) 85a, and the interface unit (a) 85a are initialized (S213). .. Next, the CPU (a) 81a adjusts the amount of emitted light (S214) of the image reading units (here, the CIS unit) 70a and 70b. Next, the color reference plates 72a and 72b provided on the facing surfaces of the CIS units 70a and 70b are read, and shading correction is performed to correct the output at that time to a predetermined value (S215).

The reset state of the CPU (b) 81b is released by the start instruction control (S212) from the CPU (a) 81a described above, and the CPU (b) 81b starts starting. As a result, the CPU (b) 81b reads out the program including the OS from the non-volatile memory of the storage unit (b) 82b and executes it (S216). At this time, even if the program is executed directly from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and the program on the volatile memory is executed, or some programs are executed from the non-volatile memory. It may be expanded on the volatile memory, the program on the volatile memory may be executed, and the program not on the volatile memory may be executed from the non-volatile memory. Then, after the initial setting of the hardware (S217), the OS is started to start (S218). The CPU (b) 81b takes about several tens of seconds to complete the OS startup (S219). The start-up may be completed at any timing during or after the initialization process (S213, S214, S215) of the control device of the CPU (a) 81a. There are no particular timing restrictions.

When the startup of the OS is completed, the CPU (b) 81b acquires the right to use the display I / F on the display device 83b for display control on the display device 83b (S220). Here, since the CPU (a) 81a releases the right to use the display I / F and then executes the start instruction processing (S211) of the CPU (b) 81b, the display I / F is used at this point. The right can be acquired exclusively by the CPU (b) 81b without mediation.

After acquiring the right to use the display I / F, the CPU (b) 81b starts the screen display control on the display device 83b (S221). As a result, the display device 83b executes screen display according to an instruction from the CPU (b) 81b (S222). At this time, the screen display control may be started after the control IC included in the display device 83b is initialized again. After that, the CPU (b) 81b controls the screen display on behalf of the CPU (a) 81a, and causes the display device 83b to execute the necessary screen display as needed.

The CPU (b) 81b subsequently initializes the uninitialized control devices such as the communication unit (b) 84a and the interface unit (b) 85b (S223). Here, as the communication unit (b) 84b, a wired / wireless network communication unit or the like can be considered. Further, as the interface unit (b) 85b, a control interface of the touch panel 83a included in the operation unit 83 or the like can be considered. These initialization processes are completed and the startup is completed.

In the present embodiment, the CPU (b) 81b maintains the reset state from the completion of the initial screen display control to the release of the right to use the display I / F after the CPU (a) 81a performing the initial screen display control, and the CPU (b) b) 81b is not activated. After that, after the CPU (a) 81a completes the initial screen display control and gives up the right to use the display I / F, the CPU (b) 81b performs start instruction control to release the reset of the CPU (b) 81b. When the 81b starts the screen display control, the CPU (a) 81a surely gives up the right to use the display I / F, and the initial screen control of the CPU (a) 81a and the screen display control of the CPU (b) 81b are performed at the same time. Since the conflicting operation requesting the right to use the display I / F does not surely occur, it is not necessary to arbitrate the right to use the display I / F using the communication unit (c), and the process can be simplified.

Here, an example is shown in which the CPU (a) 81a gives up the right to use the display I / F and then performs the start instruction control, but the timing of the start instruction control of the CPU (b) 81b is the display I / F. It does not have to be after giving up the right to use. For example, the CPU (a) 81a may perform start instruction control immediately after the reset is released and the operation is started, and before the CPU (b) 81b requests the right to use the display I / F and starts the screen display control. , The start instruction control of the CPU (b) 81b may be performed so that the CPU (a) 81a completes the initial screen display control and can release the right to use the display I / F. As a result, the initial screen control of the CPU (a) 81a and the screen display control of the CPU (b) 81b do not cause a conflicting operation requesting the right to use the display I / F, so that the display I / using the communication unit (c) is used. It is not necessary to arbitrate the right to use F, the processing can be simplified, and the time required to start the device can be shortened.

<Third embodiment>
Next, the image reading device according to the third embodiment will be described. Since the basic configuration of the device is the same as that of the first embodiment, only the different parts will be described.

The method of starting the image reading device A is different between the present embodiment and the first embodiment. FIG. 6 is a sequence chart showing a sequence at the time of starting the image reading device A in the third embodiment. It should be noted that this sequence chart shows the relative sequence relationship, not the absolute time. The basic configuration of the control unit is the same as that of the first embodiment.

<Startup operation>
When the user presses the power button 122 (S300), the image reading device A turns on the power and starts starting. At this time, the CPU (a) 81a is reset released (S300a) and starts operation. The CPU (a) 81a reads and executes a program including the OS from the non-volatile memory of the storage unit (a) 82a (S301). At this time, even if the program is executed from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and executed on the volatile memory, and some programs are executed from the non-volatile memory on the volatile memory. You may expand to and execute the program on the volatile memory, and expand the program that is not on the volatile memory directly from the non-volatile memory or on the volatile memory and execute it. On the other hand, at this time, the CPU (b) 81b is in a state in which the reset state is maintained and the operation has not started (S302). Here, in order to keep the CPU (b) 81b in the reset state, a reset signal is input to the CPU (b) 81b from the outside. The reset signal input to the CPU (b) 81b is sent using a part of the communication unit (c) 84c, and an example of the communication unit (c) 84c is a general-purpose IO port connected to the CPU (a) 81a. Is.

The CPU (a) 81a starts the OS (S304) after the initial setting of the hardware (S303). Next, when the OS has completed booting (S305), it immediately controls the general-purpose IO port that is a part of the communication unit (c) 84c to perform startup instruction control to release the reset state of the CPU (b) 81b (S306). ). Next, the CPU (a) 81a acquires the right to use the display I / F of the display device 83b (S307). At this point, the CPU (b) 81b is immediately after the reset is released, and the operation of acquiring the right to use the display I / F is impossible due to the startup sequence. Therefore, the CPU (a) 81a is exclusive without the need for arbitration. You can get the right to use the display I / F.

Next, the CPU (a) 81a starts applying a power source to the display device 83b (S308). As a result, the display device 83b is energized (S309). The CPU (a) 81a displays on the display device 83b by using the display I / F (not shown) included in the interface unit (c) 85c with respect to the control IC (not shown) built in the display device 83b. Initial settings such as resolution and number of colors are transmitted, and at the same time, image data information to be displayed on the initial screen for initial screen display is displayed on the above control IC (not shown) using an I / F (not shown). The initial screen display control (S310) is performed so that the control IC starts displaying the initial screen on the display device 83b. At this point, since the initial screen is displayed on the display device 83b (S311), the user can recognize that the image reading device A has started to start. Next, the CPU (a) 81a releases the right to use the display I / F by completing the initial screen display control (S312). After that, the CPU (a) 81a does not request the right to use the display I / F during startup.

Subsequently, the CPU (a) 81a starts the initialization process of the control device. First, the control devices (actuator 86, sensor 87) connected to the communication unit (a) 84a and the interface unit (a) 85a are initialized (S313). Next, the CPU (a) 81a adjusts the amount of emitted light (S314) of the image reading units (here, the CIS unit) 70a and 70b. Next, the color reference plates 72a and 72b provided on the facing surfaces of the CIS units 70a and 70b are read, and shading correction (a) is performed to correct the output at that time to a predetermined value (S315).

Here, since the shading correction is executed by the averaging process, it occupies a large amount of time in the startup process of the CPU (a) 81a. Further, shading correction needs to be individually corrected according to reading conditions such as resolution setting and color setting. Generally, at startup, shading correction is performed under the reading conditions of the default resolution setting and color setting, and for shading correction of other reading conditions, it is determined whether or not the shading correction is completed under the reading conditions specified before the start of reading. However, if it is not completed, control is taken to perform shading correction. The shading correction (a) (S315) here in the present embodiment is performed only for the default reading conditions.

By the way, if the CPU (b) 81b has not been started when the CPU (a) 81a has completed the shading correction (a) (S315), the CPU (a) is then started until the CPU (b) 81b is started. 81a is in a waiting state. During this time, without putting the CPU (a) 81a in the waiting state, the shading correction (b) according to the resolution and the color setting, which is not performed in the shading correction (a) (S315), is performed (S316). This shading correction (b) may be performed under all reading conditions (resolution and color setting). Further, the shading correction may be performed by selecting the default reading conditions (resolution and color setting) in a limited manner. Alternatively, the default quantity may be preferentially selected based on the frequency information of the reading conditions (resolution and color setting) used by the user in the past, and the shading correction may be sequentially performed. Alternatively, shading correction may be performed in order from the one with the highest frequency based on the frequency information of the resolution and the color setting used by the user in the past. That is, the reading condition that the CPU (a) 81a is not executed by the shading correction (a) between the completion of its own startup (here, after the shading correction (a) is executed) and the completion of the startup of the CPU (b) 81b. Shading correction (b) (S316) of is executed.

On the other hand, the CPU (b) 81b is started by the start instruction control (S306) of the CPU (a) 81a. The CPU (b) 81b reads and executes a program including the OS from the non-volatile memory of the storage unit (b) 82b (S317). At this time, even if the program is executed from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and executed on the volatile memory, and some programs are executed from the non-volatile memory on the volatile memory. You may expand to and execute the program on the volatile memory, and expand the program that is not on the volatile memory directly from the non-volatile memory or on the volatile memory and execute it. Then, after the initial setting of the hardware (S318), the OS is started to start (S319). The CPU (b) 81b takes about several tens of seconds to complete the OS startup (S320).

When the startup of the OS is completed, the CPU (b) 81b acquires the right to use the display I / F on the display device 83b for display control on the display device 83b (S321). Here, the right to use the display I / F on the display device 83b is acquired. In this case, since it is not certain that the CPU (a) 81a has released the right to use the display I / F, the CPU (b) 81b uses the communication unit (c) with the CPU (a) 81a. The usage right is arbitrated, and the usage right is transferred from the CPU (a) 81a to the CPU (b) 81b. At this time, the arbitration may be performed by the CPU (a) 81a, the CPU (b) 81b, or another arbitration unit (not shown).

After acquiring the right to use the display I / F, the CPU (b) 81b starts the screen display control on the display device 83b (S322). At this time, the screen display control may be started after the control IC included in the display device 83b is initialized again. After that, the CPU (b) 81b controls the screen display of the display device 83b. The CPU (b) 81b subsequently initializes the control device that has not been initialized, and the startup is completed.

Here, as described above, the CPU (a) 81a performs shading of a plurality of reading conditions by the shading correction (b) (S316) until the CPU (b) 81b is started up. When the CPU (b) 81b is started up, the CPU (a) 81a completes the shading correction (b) (S316) at the time when the shading correction under the reading condition being executed at this point is completed, and the start-up is completed. Alternatively, when the CPU (b) 81b is started up, the shading correction (b) may be stopped at this point and the CPU (a) 81a may be started up.

In the present embodiment, the CPU (a) 81a issues a start instruction to the CPU (b) 81b at an early stage after the start operation of the CPU (b) 81b having a long start time, so that the CPU (b) The start-up time of 81b can be controlled to be the shortest from the power-on, and there is an advantage that the time from the power-on to the use of the device can be minimized.

Further, the CPU (a) 81a makes effective time by performing shading correction under a plurality of reading conditions so as not to be in the start-up waiting state of the CPU (b) 81b until the CPU (b) 81b is started. It becomes possible to use. That is, it is not necessary to wait for the start of the reading operation for shading correction when the user starts reading. In the present embodiment, an example has been described in which the CPU (a) 81a performs shading correction without being in a waiting state until the CPU (b) 81b completes startup, but the control performed during this period is shading correction. Not limited to this, it may be a combination of some control processing.

<Fourth Embodiment>
Next, the image reading device according to the fourth embodiment will be described. The present embodiment is different from the above-described embodiment in that the control unit (a) 80a and the control unit (b) 80b are provided on the same semiconductor integrated circuit. Since the other configurations are the same as those in the first embodiment, the description thereof will be omitted, and only the differences will be described below.

FIG. 7 is a control configuration diagram when the control integrated circuit 181 is used. The portion surrounded by the dotted line in the figure is the control integrated circuit 181. The control integrated circuit (hereinafter referred to as SoC: System on Chip) 181 is an integrated circuit including a control unit (a) 80a and a control unit (b) 80b. Here, the control unit (a) 80a and the control unit (b) 80b generally include a CPU (a) 81a and a CPU (b) 81b, respectively, and they are mounted on the same semiconductor integrated circuit. The CPU is an arithmetic unit, and includes a so-called CPU, MPU, DSP, and the like. Further, although the embodiment in which two CPUs are mounted is shown here, a plurality of arithmetic units may be mounted in combination.

The SoC181 includes a communication unit 84 and an interface unit 85. Here, the communication unit 84 and the interface unit 85 are shared by the control unit (a) 80a and the control unit (b) 80b via an internal bus and a bus switch. The communication unit 84 and the interface unit 85 include a USB interface, an SCSI interface, an interface to a controller of a wired communication network (PCIe, MII (media independent interface), etc.), and a communication interface with a wireless communication module (SDIO, PCIe, etc.). , Serial communication interface (SPI, UART, I2C, etc.), analog output function (DAC), analog input function (ADC), PWM output function, etc. In addition, a display I / F connected to the display device 83b, such as SPI or DisplayPort, is built in.

Further, the SoC181 has a memory controller 182 and a memory bus for connecting to the external storage unit 82. As the storage unit 82, for example, a high-speed SDRAM or the like can be considered, and it is used as a memory area of the CPU (a) 81a and the CPU (b) 81b. Further, a plurality of memory controllers 182 and memory buses may be provided, and as another usage, a non-volatile memory for holding a program storage area or non-volatile information may be connected. Further, the storage unit 82 does not have to be connected to the memory controller 182 on the memory bus, and may be connected to another interface unit 85 or communication unit 84 described above.

In addition, the SoC181 may have a dedicated interface for controlling the image reading unit 70 and receiving reading data from the image reading unit 70. The SoC181 includes a reset control unit for the CPU (b) 81b (not shown), a clock supply control unit, and a power supply control unit, and these controls are performed by the CPU (a) 81a. It is obvious that the SoC181 has a smaller mounting area than when the control unit (a) 80a and the control unit (b) 80b are mounted as separate integrated circuits.

<How to start CPU (b)>
When the user turns on the power, the power supply to the entire device is started, and the reset signal input to the SoC181 from the external reset control circuit (not shown) is released. As a result, the reset of the CPU (a) 81a is released, and only the CPU (a) 81a starts starting. Here, the reset control circuit is a circuit in which when the power supply voltage exceeds the threshold value, the output becomes a logical level that resets the SoC, the output of this logical level is maintained for a predetermined time, and then the output is inverted. Generally, a dedicated IC called a reset IC is used. At this point, the SoC181 has the reset control unit (not shown) for the built-in CPU (b) 81b in the reset state, the clock supply control unit in the output stop state, and the power supply control unit in the supply stop state. b) 81b is in a state where it cannot be started.

The CPU (a) 81a reads and executes a program including the OS from the non-volatile memory of the storage unit 82. At this time, even if the program is executed directly from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and the program on the volatile memory is executed, or some programs are executed from the non-volatile memory. It may be expanded on the volatile memory, the program on the volatile memory may be executed, and the program not on the volatile memory may be executed from the non-volatile memory.

The CPU (a) 81a executes a start-up process for starting the CPU (b) 81b based on the program. Here, in the start instruction process, for example, the reset control unit (not shown) built in the SoC181 is set to the reset release state, the reset signal for the CPU (b) 81b is released, and the clock control unit for the CPU (b) 81b is set. The clock input to the CPU (b) 81b is started in the output state, and the power supply to the CPU (b) 81b is started in the power supply control unit. As a result, the CPU (b) 81b can start the startup process.

When the startup process can be started, the CPU (b) 81b executes an instruction from the predetermined address of the storage unit 82, reads a program including the OS from the non-volatile memory, and executes the instruction. At this time, even if the program is executed directly from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and the program on the volatile memory is executed, or some programs are executed from the non-volatile memory. It may be expanded on the volatile memory, the program on the volatile memory may be executed, and the program not on the volatile memory may be executed from the non-volatile memory.

<Transition to power saving mode>
The image reader A shifts to the power saving mode in order to reduce the power consumption of the entire device when the user or the external control device does not give an instruction for a certain period of time or when there is an instruction to shift to the power saving mode. To do. The CPU (a) 81a is a CPU (a) 81a when there is no operation from the user for a certain period of time, or when a condition for shifting to the power saving mode occurs, such as receiving an instruction to shift to the power saving mode by an instruction from the user. b) Instructs 81b to transition to the power saving mode via the communication unit (c). The CPU (b) 81b stops the control of the self-confidence-controlled device connected to the interface unit 85 and the communication unit 84. Further, the control of the touch panel 83a and the display device 83b via the interface unit 85 is also stopped. At this time, the CPU (a) 81a is notified via the communication unit 84 that the right to use the display I / F is released when the control on the display device 83b is stopped. In addition, information is stored in the non-volatile memory of the storage unit 82 as needed. After that, the CPU (b) 81b notifies the CPU (a) 81a via the communication unit 84 that the power saving mode can be entered.

On the other hand, when the CPU (a) 81a instructs the CPU (b) 81b to make a power saving mode transition, a part of the actuator 86 or the sensor 87 connected to the interface unit 85 and controlled by the CPU (a) 81a, for example, the image reading unit 70a. Stop 70b. Next, when a notification is received from the CPU (b) 81b via the communication unit (c) 84c to notify the release of the right to use the display I / F, the right to use the display I / F is secured. The CPU (a) 81a, which has secured the right to use the display I / F, controls the display device 83b to display a display different from the normal operation screen, such as displaying "sleeping", and the user. Notifies that the device is in power saving mode. At this time, the CPU (a) 81a executes display stop processing control for the display device 83b via the display I / F, stops the application of the power supply to the display device 83b, and stops the display on the display unit. However, the power consumption may be further reduced. At this time, the CPU (a) 81a uses a light emitting unit (not shown) (for example, it is always lit during normal operation and blinks slowly in the power saving mode), so that the user is in the power saving mode. May be notified.

Next, when the CPU (a) 81a receives that the CPU (b) 81b can shift to the power saving mode via the communication unit 84, the CPU (a) 81a is not shown to the CPU (b) 81b. The reset control unit is changed to the reset state, the clock supply control unit is changed to the output stop state, the power supply control unit is changed to the supply stop state, and the CPU (b) 81b is put into the operation stop state. Further, in the power saving mode, the CPU (a) 81a may be operated at a slower operating clock than in the normal operation to further reduce the power consumption.

<Operation in power saving mode>
During the power saving mode, the CPU (a) 81a monitors changes in the switch 83c and the sensor 87 connected to the operation unit 83. Further, the instruction from the external control device connected to the communication unit (a) 84a may be monitored. At the same time, the blinking control of the light emitting unit may be performed in order to notify the user that the device is in the power saving mode. At this time, the CPU (b) 81b has completely stopped its operation and is in the reset state.

<Return from power saving mode>
When the CPU (a) 81a detects a condition for returning from the power saving mode, for example, that the user presses the switch 83c, the CPU (a) 81a starts returning from the power saving mode. The CPU (a) 81a returns the operating clock dropped during the power saving mode to the operating clock during normal operation. Next, the CPU (a) 81a executes a start-up process for starting the CPU (b) 81b based on the program. Here, for example, the start instruction process sets the reset control unit (not shown) built in the SoC181 to the reset release state, releases the reset signal for the CPU (b) 81b, and outputs the clock control unit for the CPU (b) 81b. In this state, the clock input to the CPU (b) 81b is started, and the power supply control unit is set to the supply state to start the power supply to the CPU (b) 81b. As a result, the CPU (b) 81b can start the startup process.

When the startup process can be started, the CPU (b) 81b executes an instruction from a predetermined address in the storage unit 82, reads a program including an OS from the non-volatile memory, and executes the instruction. At this time, even if the program is executed directly from the non-volatile memory, all the programs are expanded from the non-volatile memory to the volatile memory and the program on the volatile memory is executed, or some programs are executed from the non-volatile memory. May be expanded on the volatile memory to execute the program on the volatile memory, and the program not on the volatile memory may be executed from the non-volatile memory.

At this time, the CPU (a) 81a controls the application start of the power supply of the display device 83b before or after the start-up processing of the CPU (b) 81b, the display device 83b is energized, and the CPU (a) 81a displays. Initial settings such as screen resolution and color number setting to be displayed on the display device 83b using the display I / F (not shown) included in the interface unit 85 for the control IC (not shown) built in the device 83b. To send. Next, even if display control is performed to notify the user that the recovery from the power saving mode is being performed, for example, a display such as "returning" is displayed on the display device 83b via the display I / F. good. At the same time, the blinking control of the light emitting unit, which was performed to notify the user that the device is in the power saving mode, is changed to the constant lighting control. Next, the CPU (a) 81a releases the right to use the display I / F, stops the operation when transitioning to the power saving mode, and initializes the communication unit (a) 82a, the interface unit (a) 85a, and the like. To make it controllable again. Next, CIS light intensity adjustment and shading correction are performed.

On the other hand, the CPU (b) 81b that has received the start instruction process from the CPU (a) 81a restarts from the start of the OS, and when the start of the OS is completed, the display control to the display device 83b is performed on the display device 83b. Acquire the right to use the display I / F. Here, the CPU (a) 81a is requested to use the display I / F via the communication unit 84, and the CPU (a) 81a permits it, so that the CPU (b) 81b is the display I / F. Acquire the right to use F. At this time, if it is decisive in the control sequence that the CPU (a) 81a releases the right to use the display I / F, the right to use the display I / F is communicated via the communication unit 84. You may get it directly without it.

After acquiring the right to use the display I / F, the CPU (b) 81b starts the screen display control on the display device 83b. As a result, the screen display of the display device 83b is executed according to the instruction from the CPU (b) 81b. At this time, the screen display control may be started after the control IC included in the display device 83b is initialized again. After that, the CPU (b) 81b controls the screen display on behalf of the CPU (a) 81a, and causes the display device 83b to execute the necessary screen display as needed.

The CPU (b) 81b subsequently initializes a control device that is not initialized and is controlled by itself, for example, a communication unit 84 or an interface unit 85. Here, as the communication unit, a wired / wireless network communication unit or the like can be considered. Further, as the interface unit 85, a control interface of the touch panel 83a included in the operation unit 83 or the like can be considered. These are completed and the return from the power saving mode is completed.

According to the present embodiment, the mounting area can be reduced by mounting a plurality of control units on one SoC181, and these effects can be realized together by combining with the above-described embodiment. In addition, it is possible to display on the display unit without waiting for the return of the control unit, which displays when the device is operating when returning from the power saving mode, and the user can be notified that the return operation is in progress. You will not accidentally turn off the power when you suspect a malfunction.

Although the embodiments of the present invention have been described in detail above, it is clear to those skilled in the art that various modifications can be made within the scope of the present invention.

A Image reader S Conveying medium 1 Mounting table 2 Discharge trays 80, 80a, 80b Control units 81a, 81b CPU
82, 82a, 82b Storage unit 83 Operation unit 83b Display device 84, 84a, 84b, 84c Communication unit 85, 85a, 85b, 85c Interface unit 86 Actuator 87 Sensor 181 Integrated circuit for control

Claims (11)

A control device including a first control unit and a second control unit,
A screen display unit whose display is controlled by the first control unit and the second control unit,
A control signal line to the screen display unit shared by the first control unit and the second control unit is provided.
The first control unit operates with a program that starts faster than the second control unit.
The second control unit executes control that is less immediate than the first control unit.
When the control device is started from the hibernation state, the first control unit acquires the right to use the control signal line after the start and executes initial screen display control for displaying the initial screen on the screen display unit. And
After the program is started, the second control unit acquires the right to use the control signal line while the initial screen is displayed on the screen display unit, and controls the screen display of the screen display unit. A display device characterized by. The first control and the second control unit have communication means for communicating with each other.
When the control device is activated from the hibernation state, only the first control unit starts the activation process, and the second control unit issues an activation start instruction from the first control unit to the communication means. The display device according to claim 1, wherein the activation is started when the display device is received via the device. Claim 1 or 2 characterized in that when the second control unit is activated at the time of activation of the control device from the hibernation state, the first control unit is requested to use the control signal line. The display device described in. The first control unit releases the right to use the control signal line after performing initial screen display control on the screen display unit when the control device is started from the hibernation state, and then the second control unit. The display device according to any one of claims 1 to 3, wherein the start of the control unit of the control unit is instructed to start. The first control unit executes an activation start instruction of the second control unit when the control device is started from a hibernation state.
The claim is characterized in that the first control unit completes the initial screen display control on the screen display unit before the second control unit starts display control on the screen display unit. The apparatus according to any one of 1 to 3. The first control unit according to any one of claims 1 to 5, wherein when the control device is started from a hibernation state, the first control unit performs an initialization process of a control device that can be controlled via an interface. Equipment. The display device according to claim 6 is mounted.
An image reading device including an image reading unit for reading an image of a document, wherein the first control unit controls image reading of the image reading unit via the interface. A mounting table on which the manuscript is placed and
A transport unit for transporting the document along the transport path,
With
The image reading device according to claim 7, wherein the first control unit executes the image reading control on a document conveyed by the conveying unit. When the control device is started from the hibernation state, the first control unit executes initial screen display control on the screen display unit and gives an activation start instruction of the second control unit.
The image reading device according to claim 7 or 8, wherein an initialization process for initializing the image reading unit is performed during the activation process of the second control unit. The image reading unit is an image sensor.
The image reading apparatus according to claim 9, wherein the initialization process is at least light amount adjustment or shading correction. The first control unit and the second control unit are mounted on one semiconductor integrated circuit.
The device or image reading device according to any one of claims 1 to 10, wherein the first control unit controls power supply to the second control unit.

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