JP5764951B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus. More specifically, the present invention relates to an image forming apparatus suitable for reducing power consumption in the energy saving mode.

  As an image forming apparatus such as a printer, a facsimile machine, a copying machine, and a multifunction machine of these, for example, an apparatus including a recording head composed of a liquid discharge head is used, and a recording medium (hereinafter also referred to as paper, although the material is not limited). In addition, while transporting the recording medium, recording paper, transfer material, recording paper, etc., the image is formed by attaching ink as a liquid to the paper (recording, printing, printing, printing is also synonymous) A so-called ink jet type image forming apparatus is known.

  Further, for example, an electrostatic latent image is formed on the surface of a photosensitive drum as an image carrier, and the electrostatic latent image on the photosensitive drum is developed with a toner or the like as a developer to be a visible image. There is known an electrophotographic image forming apparatus in which an image is carried on a recording paper by a transfer device to carry an image, and a toner image on the recording paper is fixed by a fixing device using pressure or heat.

  In the image forming apparatus as described above, in recent years, there has been a great demand for reduction of power consumption in consideration of environmental problems and the like, and in particular, reduction of power consumption during standby without operation or job execution has been demanded. Therefore, in order to reduce power consumption, the image forming apparatus is equipped with an energy saving mode (energy saving mode) that stops power supply to units that consume a large amount of current such as scanners and plotters. Electric power is being reduced.

  As a technique for reducing power consumption of the image forming apparatus, for example, when an error occurs in the image forming apparatus, a timer (energy saving mode transition timer) that counts the transition to the energy saving mode after a predetermined time has elapsed is counted up. In addition, the technology shifts to the energy saving mode, displays the error contents on the display screen of the image forming apparatus, supplies power to the recovery detection means necessary for error detection and cancellation, and cancels the energy saving mode when recovering from the error. It has been known.

  For example, Patent Document 1 discloses an image processing apparatus capable of displaying an error even when the power saving function is in operation, and an error has occurred in the apparatus before shifting to the energy saving mode. An image processing apparatus that returns to the normal mode from the energy saving mode when an error cancellation is detected while the error display notifying the user that an error has occurred is displayed for the purpose of improving the energy saving effect until the error is canceled. It is disclosed.

  However, in the above technology, when an error occurs, the power saving mode is shifted to the power saving mode except for the display screen and the recovery detection unit. In recent years, the image forming apparatus has a large liquid crystal display as the display screen. The number of devices provided with (LCD) is increasing, and such an image forming apparatus has a problem that large power consumption is generated only by displaying error contents on the display screen.

  In particular, when the error contents are complicated, there is a problem that a large amount of power is consumed for power supply to the recovery detection means. In addition, when the recovery detection by the recovery detection means is inaccurate, it will return from the energy saving mode by mistake, resulting in a problem that a sufficient energy saving effect cannot be obtained, and the operator will perform unnecessary error canceling operations. There was a problem.

  Therefore, the present invention reduces the power consumption in the energy saving mode by displaying an error display capable of minimizing the power consumption when an error occurs, and suppressing the power consumption in the time required for error canceling work etc. An object of the present invention is to provide an image forming apparatus capable of performing the above.

In order to achieve this object, the image forming apparatus according to claim 1, when an error of the apparatus is detected, the image forming apparatus that shifts to an energy saving mode that operates while suppressing power consumption more than the normal operation mode. In the mode, a low power display means for displaying the display unit with lower power than in normal operation, a judgment means for detecting an error and judging a usable function from the error content, and a control means, In the energy saving mode , the control means uses the low power display means to display the error contents and the functions determined to be usable by the judging means on the display section so that the functions can be selected, and can be used as displayed on the display section. If any of the determined function is selected, is displayed to allow the display unit changes the settings of possible functions for said use, a change for the setting is input, variable settings Determine the site necessary, it turns the power on for the required site, it also the normally Ru is returned to the operating mode.

According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the security level of the user can be set, and a security management unit that performs user management according to the security level is provided. , depending on the security level by the security management means, it is intended to be displayed on the display unit the default setting screen can not be different screens or setting change of which can be set changes.

According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect , the low power display means can be used by the error content and judgment means by using a partial area of the display unit. The determined function is displayed on the display unit in a selectable manner.

  According to the present invention, power consumption in the energy saving mode can be reduced.

1 is a functional block diagram illustrating an image forming apparatus according to an embodiment. It is a functional block diagram of an LCD unit. It is a schematic diagram which shows the example of a display on the display part in energy saving mode. It is a schematic diagram which shows the other example of a display part. It is a flowchart explaining operation | movement of main MPU. It is a flowchart explaining operation | movement of an operation part controller. It is a schematic diagram which shows an example of a function setting screen. It is a schematic diagram which shows the other example of a function setting screen. It is a schematic diagram which shows the other example of a function setting screen.

  Hereinafter, the configuration according to the present invention will be described in detail based on the embodiment shown in FIGS. In the following embodiments, the “energy saving mode” refers to a time when the image forming apparatus is in a normal operation (that is, when a functional operation is possible and each part of the apparatus is activated. In order to reduce power consumption, the entire device is in a state of low power consumption. “Low power mode” means that each part and its control CPU, ASIC, etc. have lower power consumption than during normal operation. The state which was made to become.

  When the image forming apparatus 100 according to the present embodiment detects an error of the apparatus, the image forming apparatus 100 that shifts to the energy saving mode that operates while suppressing power consumption than the normal operation mode displays the display in the energy saving mode. Power display means (operation unit controller 17, LCD unit 15, etc.) for displaying the display unit (LCD panel 20) with lower power than during normal operation, and detecting usable errors and determining usable functions from the error contents In the energy saving mode, the determination means (main MPU1, etc.) and the low power display means are used to display the error contents and the functions determined to be usable by the determination means on the display section so that they can be selected and displayed on the display section. When one of the functions determined to be usable is selected and a predetermined operation is performed on the usable function, the normal operation mode is set. Control means (operation section controller 17, the main MPU1 etc.) to return those equipped with a.

  That is, when the operation unit 60 operates in the low power mode when the image forming apparatus 100 is in the energy saving mode, even in the energy saving mode when an error is detected, a function that can be used regardless of the error is minimized. By displaying on the display unit (LCD panel 20) and enabling the operator to select and use, an energy saving mode with good operability and low power consumption can be achieved. In addition, even when an operation is performed in the energy saving mode at the time of error detection, power consumption in the time required for error canceling work or the like is suppressed by not returning to the normal operation mode immediately.

(First embodiment)
[Configuration of image forming apparatus]
FIG. 1 is a functional block diagram of an image forming apparatus 100 according to the present embodiment. The image forming apparatus 100 includes a main control unit 50, an operation unit 60, an engine unit 70, and the like.

  The main MPU 1 that controls the entire image forming apparatus 100 and has a peripheral circuit is connected to a program ROM (FROM) (1) 3a, a work DRAM (1) 4a, an HDD 5 for data storage, and an image processing control unit (DSP) 7. The system bus (1) 40 is connected to the I / O bus 42 via the bus arbiter 6.

  The engine MPU 2 that performs engine control processing has a program ROM (2) 3b and a work DRAM (2) 4b in the system bus (2) 41. The system bus (2) 41 includes a plotter control unit 8b that controls the plotter I / O 8a, a scanner control unit 9b that controls the scanner 9a, a laser control unit 10b that controls the laser unit 10a, an ADF 11b, and a paper supply bank 11c. The I / O control unit (1) 11a for controlling the motor / clutch 11d and the sensor 11e is connected. Further, image reading data from the scanner 9 a and image writing data to the laser unit 10 a are transmitted and received with the image processing control unit 7. Further, the main MPU 1 and the engine MPU 2 can perform serial communication for exchanging communication commands.

  A FAX modem 12b that performs facsimile communication is connected to the I / O bus 42, and is connected to an analog telephone network via an analog line I / F 12a. A LAN_I / F 13a that communicates with a network, a USB device, and a USB_PHY 13b that performs USB communication with a host are also connected.

  In this embodiment, the operation unit 60 is connected to the I / O control unit (2) 14 connected to the I / O bus 42 and the operation unit controller 17 of the operation unit 60 performs serial communication to display the operation unit 60. Controls key scanning and LEDs. The operation unit 60 is equipped with an LCD unit 15 in which an LCD panel, an LCD display common driver, a segment driver, and an LCD controller are integrated. I do. The operation unit 60 is equipped with a touch panel 16a, and the control is performed by the operation unit controller 17 along with the control of the key switch 16b and the LED 16c.

  Further, a FROM (3) 3c storing fixed screen display data and a DRAM (3) 4c as a drawing work RAM are connected to the operation unit controller 17.

  As for the AC power source, various DC voltages and IO voltages are generated by the DC power source generation unit 19 from the power cord 18. The DC voltages V1, 2V,..., Vh can be turned on / off in a predetermined manner by the PCNT signal of the I / O control unit (2) 14.

[Low power display means]
FIG. 2 shows a functional block diagram of the LCD unit 15. A common driver 22 and segment drivers 23a and 23b are connected to the large LCD panel 20. The example shown in FIG. 2 shows a configuration example of a LCD of 640 × 480 dots, a common 160 dots × 3 drives, and a segment 160 dots × 2 columns × 8 drivers. Timing adjustment is performed on these drivers, and dot on / off control is performed from the LCD controller 21 to perform LCD monochrome display.

  In the normal drawing of the image forming apparatus 100, the main MPU 1 displays the drawing data directly via the bus arbiter 6, the I / O control unit (2) 14, and the operation unit controller 17.

  On the other hand, if there is no incoming call from the communication network, or no print print request from the network or USB, the image forming apparatus 100 shifts to the energy saving mode. The transition to the energy saving mode is performed by the main MPU 1 measuring time with a timer (energy saving mode transition timer), and various control units connected to the engine MPU 2 and the I / O bus 42 when shifting to the energy saving mode after a predetermined time has elapsed. 12b, 13a, and 13b, and the I / O control unit (2) 14 turns off some of the DC power sources.

  There are a plurality of power suppression patterns in the energy saving mode. For example, the power of the engine unit 70, the HDD 5, and the image processing control unit 7 below the engine MPU 2 is turned off, and the main MPU 1, program ROM (1) 3a, work DRAM (1 ) 4a shifts to the low power mode of the LSI. Further, the FAX modem 12b, the LAN_I / F 13a, and the USB_PHY 13b are set so as to be able to shift to the respective low power modes for monitoring only events from the I / O. When there is an event, the main MPU 1 is interrupted through the bus arbiter 6 so that the energy saving mode can be restored. The I / O control unit (2) 14 also performs the same processing when there is an event from the operation unit 60.

  When the operation unit controller 17 receives the notification of transition to the energy saving mode, the operation unit controller 17 notifies the LCD controller 21 accordingly. The LCD controller 21 controls and holds some of the drivers 22, 23a, and 23b so as to reduce the power. In the example shown in FIG. 2, the drivers other than the shaded area are set in the low power state so that the display is turned off except for the shaded area of the LCD panel 20.

  Specifically, the frequency of the row column drive clock supplied to each driver 22, 23a, 23b by the operation unit controller 17 is a high frequency that does not make the flickering noticeable at normal times, but is the minimum necessary in the low power mode described above ( For example, if the drawing is performed at a frequency that is slow enough to display once every few seconds), not only the operation unit controller 17 but also the driver driven at that frequency becomes in a lower power state. . Further, a low power state can be achieved even if the drivers 22, 23a, and 23b other than the hatched portions are made to have high impedance by using gated ICs or separated from the power supply itself.

  The state operated and driven as described above is referred to as “low power mode” of the LCD unit 15 and the operation unit 60.

  FIG. 3 shows an example of a simple display screen in the energy saving mode. The display shown in FIG. 3 is performed on the hatched portion (energy saving display portion) 20a (FIG. 2) which is a part of the LCD panel 20. In the example illustrated in FIG. 3, buttons 24 for selecting functions of copy (“Copy”), scanner (“Scan”), fax (“Fax”), and document BOX (“Box”) are displayed. The touch panel 16a is controlled so that the pressing of can be detected. Further, an illustration inside the apparatus is displayed in the area 25 (illustration display area), and a comment is displayed in the area 26 (comment display field). Each area is realized by storing a predetermined position (the upper left dot of each area) and the vertical and horizontal sizes of the area.

  When the main MPU 1 notifies the engine MPU 2 of the transition to the energy saving mode described above, if there is an abnormality in the apparatus from the engine MPU 2, information on the location is notified. Similarly, the FAX modem 12b, the LAN_I / F 13a, and the USB_PHY 13b are notified of whether there is an abnormality. When there is no abnormality information, it is not necessary to display the illustration in the area 25. However, when there is an abnormality, the illustration is displayed, and the abnormal part is notified by marking the abnormality part.

  Specifically, it is realized by storing one or more illustrations in the FROM (3) 3c and developing the bitmap on the DRAM (3) 4c. In addition, an illustration showing an abnormal part can be generated in the region 25 by overwriting a mark mark stored in the FROM (3) 3c on the bitmap of the illustration at a position corresponding to a place where there is an abnormality.

  Also, a comment corresponding to the abnormality is bitmap-developed from the FROM (3) 3c and overwritten in the area 26.

  Specifically, when a jam occurs in any part of the apparatus, the mode shifts to the energy saving mode, but a mark is displayed at the position of the area where the jam has occurred and displayed in the area 25. In the area 26, for example, a predetermined comment such as “Jam has occurred at the mark. Open the front cover and remove the paper.” Is expanded into a bitmap. Further, the operation unit controller 17 transfers a bitmap as shown in FIG. 3 to the LCD controller 21 and displays it on the hatched portion 20 a of the LCD panel 20.

  With the above processing, a screen on which an illustration, an abnormal part, and a comment are written can be displayed only in a part of the LCD panel 20, and power consumption can be reduced when displaying on the LCD panel 20.

  Here, if there is a function that cannot be used depending on where an abnormality has occurred, the corresponding button 24 is not displayed. For example, when the plotter cannot be used, the copy button (“Copy”) is hidden, and when the analog line I / F cannot be used, the fax button (“Fax”) is hidden.

  When one of the displayed buttons 24 is pressed, the operation unit controller 17 develops a bitmap of a simple operation screen of the pressed function from the FROM (3) 3c to the DRAM (3) 4c, and displays the LCD controller 21. Display on the LCD panel 20.

  Here, the displayed simple operation screen is not displayed on the entire LCD panel 20 at the normal time, but is a simple operation screen using the shaded portion 20a. The simple operation screen is not particularly limited. For example, when the copy function is selected, the number of copies (several number buttons), the output size (only the size set in the paper cassette), and the standard enlargement / reduction are displayed. . Further, when the FAX function is selected, a speed dial button is displayed.

  In both cases, an OK button and a start button are displayed, and when pressed, the operation unit controller 17 interrupts the main MPU 1 via the I / O control unit (2) 14. When there is a response from the main MPU 1, when the OK button is pressed, the selected function operation is notified. In addition, the main MPU 1 controls the I / O control unit (2) 14 to turn on the power of the DC power generation unit 19 and executes the selected function.

  When the start button is pressed, the operation unit controller 17 notifies the main MPU 1 to that effect, requests normal screen display, and returns the operation unit 60 to the normal state. When a function selection is input, an operation procedure for pressing the OK button is set.

  In any case, the main MPU 1 does not turn on the voltage of the engine unit 70 until the OK button is pressed. Thus, invalid power consumption can be saved without returning to the normal mode until the intended use of the image forming apparatus 100 is confirmed. In addition, after a predetermined time has passed after use, the system will switch to the energy saving mode again. However, if the start button is not pressed on the simple operation screen, the power consumption for full screen display can be reduced by returning from the energy saving mode. .

[Low power display means]
In the example illustrated in FIG. 3, the example in which the LCD screen is divided and driven has been described. However, the method of driving the operation unit 60 with lower power is not limited thereto. FIG. 4 shows another example of the operation unit 60.

  As shown in FIG. 4, apart from the large LCD panel 20, at least a small simple screen (LCD panel) 28 and a start button 29 are allowed to function, and the display shown in FIG. 3 is displayed on the simple screen 28. You may make it do. In this case, the operation unit controller 17 may be configured to include the LCD unit of the simple screen 28 in parallel with the LCD unit 15.

  Thus, by displaying on the simplified screen 28, the power consumption may be reduced without performing the display on the LCD panel 20.

[Control of image forming apparatus]
Processing of the main MPU 1 and the operation unit controller 17 for realizing the above control will be described. FIG. 5 shows a flowchart for explaining the operation of the main MPU 1 and FIG. 6 shows the operation of the operation unit controller 17.

  First, the operation of the main MPU 1 up to the transition to the energy saving mode when an error occurs will be described with reference to FIG. When an error occurs in the apparatus at normal time, a normal display screen is drawn for the generated error, and is transferred to the operation unit controller 17 for drawing. At this time, regarding the error information and its recovery means, the functions and items that can be used at that time are determined, and the items for which setting selection is permitted are determined. These are coded in advance so as to be discriminated by the operation unit controller 17, and the code is notified from the main MPU 1 to the operation unit controller 17, and the operation unit controller 17 creates a display screen according to the code (S101 to S102). .

  When the set energy saving transition timer counts up (elapse of energy saving transition time) (S103: yes), the mode is shifted to the energy saving mode. Note that if the operation for using the function is performed (S107: yes) before the transition to the energy saving mode (S103: no), the flow shown in FIG. 5 is exited. Further, when the error is canceled (S108: yes), the error cancellation is notified and the process ends (S109).

  The transition to the energy saving mode will be described. The main MPU 1 notifies the engine MPU 2 and the operation unit controller 17 (S104), and controls the I / O control unit (2) 14 to turn off the engine unit 70 (S105). The power source that can be turned off on the main MPU 1 side is the same as that of the engine unit 70. Further, the main MPU 1 itself also performs the low power mode (for example, lowering the clock frequency, interrupting access to unnecessary buses, etc.) of the ASIC (S106), and the transition to the energy saving mode is completed.

  Next, the operation of the operation unit controller 17 will be described with reference to FIG. When an error occurs in the apparatus at normal time, error information is received as a code from the main MPU 1 as described above (S201).

  For the predetermined illustration screen (information on the front and side of the device), guidance, and buttons of usable functions corresponding to the received code, the stored head addresses are read from the FROM (3) 3c (S202).

  Whether or not it is time to shift to the energy saving mode is recognized by a notification from the main MPU 1 (S203). Before that (S203: no), if there is an error release notification (S213: yes), the bitmap created in the DRAM (3) 4c is discarded (memory management data is deleted) (S214).

  When the mode is shifted to the energy saving mode (S203: yes), a bitmap of a simple screen is created on the DRAM (3) 4c based on the stored head address (S204). By acquiring the storage address of the FROM, it is possible to directly read from the LCD controller 21 without using the DMA at the time of creation or developing it in the DRAM.

  Further, as described above, a part of the LCD drivers 22 and 23 are set to the low power mode, the power is turned off, and the large LCD panel 20 is turned off in the configuration shown in FIG. The screen 28 is turned on, the LCD display unit is shifted to low power (S205), and a simple screen is displayed (S206).

  As described above, when the row column drive frequency is set to a low frequency and the speed is low enough to display once every few seconds, the display of the simple screen is updated again (S207). That is, the drawing on the LCD panel 20 is performed again.

  Next, when the touch panel or key switch on the simple screen is assigned, when the key switch is pressed (S208: yes), the minimum setting menu screen for the function is read from the FROM (3) 3c and the screen is switched. (S209).

  When any button on the screen (in the case of copying, the number of copies, the size, the standard enlargement / reduction, etc.) is pressed (S210: yes), the main MPU 1 is notified of the cancellation of the energy saving mode (the bus arbiter 6 interrupts the main MPU 1). Generated, S211). Finally, the pressed function is notified from the operation unit controller 17 to the main MPU 1 with a code or the like (S211).

  As described above, in the image forming apparatus 100 according to the present embodiment, the operation unit 60 receives drawing data from the main control unit (CTL) 50 and causes the LCD panel 20 to display the drawing data. Although detailed drawing is performed, it is controlled not to display when shifting to the energy saving mode.

  That is, when an error has occurred in the apparatus, the operation unit 60 shifts to the low power mode, but the operation unit 60 minimizes the exchange of signals with the main controller unit 50 and what type of error is Energy saving mode by displaying only a static screen that is pre-determined according to the error details to indicate to the operator what is occurring at the site and what operation is required for recovery (operation procedure, guidance screen), etc. During transmission, transmission / reception with the main controller unit 50 is stopped, circuits necessary for transmission / reception are minimized, and the rest is turned off. Further, the drawing on the LCD panel 20 is made to be in a low power state by a method such that only a part of the area is drawn once every few seconds, and even if it is drawn once, it disappears step by step.

  In addition, on the still screen, a function that the image forming apparatus 100 has, that is, a function for operating the apparatus, for example, buttons such as copy, scanner, FAX, and management data confirmation are displayed at a minimum, and the detected error Depending on the situation, for example, “There is an error but this function can be used” or “This function needs to clear the error” is required to supply power to other parts of the device. When the operation is performed, the request for returning from the energy saving mode is made for the first time (when the operation requiring the CTL activation is performed, the request for returning to the CTL is made for the first time, and the CTL returns the power to the necessary part. Just to do).

  Therefore, when an error occurs, the power consumption in the energy-saving mode is improved by displaying an error that is excellent in operability and minimizing the power consumption, and suppressing the power consumption in the time required for error canceling work etc. Can be reduced.

(Second Embodiment)
In addition, when any of the functions determined to be usable displayed on the display unit is selected, each setting related to the usable function is displayed on the display unit so that it can be changed (function setting screen), and the setting is changed. Is input, it is preferable to determine a part necessary for changing the setting and turn on the power for the necessary part.

  FIG. 7 is a schematic diagram illustrating an example of the function setting screen 27. For example, when “BOX” (document BOX) of the button 24 is selected on the simplified display screen shown in FIG. 3, next, FIG. 7 which is a function setting screen of the document BOX is displayed.

  The document BOX is stored in the FROM (1) 3a and the HDD 5. The file number is searched with the function button “FILE” 30a. At this time, even if the main MPU 1 is not operating, at least a list of stored file numbers is notified from the main MPU 1 to the operation unit controller 17 and stored in the FROM (3) 3c before shifting to the energy saving mode. In the example of FIG. 7, switching is performed by pressing the right arrow in ascending order from the list (in FIG. 7, the FILE number 1234 is displayed).

  The function button “number of copies” 31a is used to set how many copies of the document having the file number 1234 are to be printed out. When the output paper finisher is attached to the peripheral device of the apparatus (connected to the I / O control unit (1) 11a), the peripheral device is used if there is a sort function.

  Further, the output paper size is selected with the function button “size” 32a. The paper size previously loaded in the paper feed tray is recognized by the I / O control unit (1) 11a from the paper feed bank 11c and the sensor 11e, and is recognized by the main MPU1 from the engine MPU2, and the same as described above. The operation unit controller 17 is notified, stored in the FROM (3) 3c, and displayed.

  Also, the function button “enlargement / reduction” 33a changes the block used in the image processing control unit 7 and becomes effective when the inside can be individually operated.

  As described above, depending on the selection setting of each function button, the function button “FILE” 30a has FROM1 (3a) or HDD (5), the function button “number of copies” 31a has a finisher (if there is a sort function), and the function button “size”. "32a" determines the necessary parts, such as the paper feed bank 11c and the function button "enlargement / reduction" 33a, such as switching of the image processing control section (7) (when the inside can be individually operated).

  In the process of notifying the pressed function setting of FIG. 7 to the main MPU 1 (S212), the above information is notified from the operation unit controller 17 to the main MPU 1 in response to the pressing. The main MPU 1 controls the I / O control unit (2) 14 and the DC power supply generation unit 19 which can individually turn on and off necessary parts according to information.

  In this way, in the energy saving mode when an error occurs, when a function that can be used is selected and set, the necessary minimum parts are turned on in order according to the operation. It is possible to supply a limited amount of power only when necessary, and to achieve higher energy savings.

(Third embodiment)
In addition, when any of the functions determined to be usable displayed on the display unit is selected, it is also preferable to display a predetermined setting screen set in advance on the usable function on the display unit.

  FIG. 8 is a schematic diagram illustrating another example of the function setting screen 27. In function selection, it is often the case that operation is performed with the same setting without detailed setting.

Therefore, as shown in FIG. 8, the office environment in which the function button “number of copies” 31b is one, the function button “size” 32b is A4, and the function button “enlargement / reduction” 33b is 100% (same size without enlargement / reduction). A general value is displayed at, and a setting change button 34 and an OK button 35 are provided in a predetermined area.

  Note that the default setting values displayed on the function buttons 31b to 33b can be set by the administrator of the apparatus. Further, the setting with the highest usage rate or the setting used in the previous operation may be displayed according to the usage status.

  The defaults of these settings differ for each function, and are stored in the FROM (3) 3c by the main MPU 1 respectively. When notifying the main MPU 1 from the operation unit controller 17 when canceling the energy saving mode, it is started by starting the device (turning on the power supply to the necessary part) only by the function selection button pressing information. Time can be shortened.

  When a usable function is selected in this way, the detailed setting screen is not displayed as the predetermined screen prepared as the function setting screen 27, thereby shortening the handshake between MPUs and reducing the startup time. can do.

(Fourth embodiment)
Further, the security level of the user can be set, and user management according to the security level, for example, a setting content that can be changed according to the security level of the user is provided (security management means). For example, it is preferable to display only default setting values for users with low security levels so that the settings cannot be changed, and for users with high security settings to be able to change settings for each item.

  FIG. 9 is a schematic diagram illustrating another example of the function setting screen 27. Unlike the example of FIG. 7, only the default setting values are displayed on the function setting screen 27 shown in FIG. 9. In addition, the password can be input from the “password” button 36, and the security level is managed by the password. The default value is stored in the FROM (3) 3c by the main MPU 1 at normal times, and the default value can be changed by the administrator of the apparatus.

  In this way, for example, it is possible to limit the function to the default value by not exposing the password to users other than the department where the image forming apparatus 100 is installed. Therefore, for example, it is possible to perform management such that only double-sided printing can be performed, and there is an energy saving effect that the number of output sheets can be limited.

  In the example shown in FIG. 9, the security level is set by a password. However, high security management can be achieved by installing an IC card, fingerprint detection means, etc. in the operation unit 60 and performing user authentication with the operation unit controller 17. It is also preferable to carry out.

  As described above, the detailed setting screen is displayed only for a specific user, and the setting change operation is limited to other users, so that the optimum setting according to the installation environment such as a department or a department in which the image forming apparatus 100 is installed. Energy saving management.

  The low power control in the energy saving mode by the image forming apparatus described above can also be executed by a program (image forming program). Further, the present invention is also applied to an aspect of a recording medium on which an image forming program is recorded so as to be executable by the image forming apparatus.

  The above-described embodiment is a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention.

1 Main MPU
2 Engine MPU
3a, 3b, 3c FROM (1) to (3)
4a, 4b, 4c DRAM (1) to (3)
5 HDD
6 Bus Arbiter 7 Image Processing Control Unit (DSP)
8a Plotter I / O
8b Plotter controller 9a Scanner 9b Scanner controller 10a Laser unit 10b Laser controller 11a I / O controller (1)
11b ADF
11c Paper feed bank 11d Motor / clutch 11e Sensor 12a Analog line I / F
12b FAX modem 13a LAN_I / F
13b USB_PHY
14 I / O control unit (2)
15 LCD unit 16a Touch panel 16b Key switch 16c LED
17 Operation unit controller 18 Power cord 19 DC power generation unit 20 LCD panel 20a Energy saving display unit 21 LCD controller 22 Common driver 23a, 23b Segment driver 24 Button 25 area (illustration display area)
26 area (comment display field)
27 Function Setting Screen 28 Simple Screen 29 Start Button 30a, 30b Function Button “FILE”
31a, 31b Function button “Number of copies”
32a, 32b Function button “Size”
33a, 33b Function button “Enlarge / Reduce”
34 Setting change button 35 OK button 36 Password button 40 System bus (1)
41 System bus (2)
42 I / O bus 50 Main control unit 60 Operation unit 70 Engine unit 100 Image forming apparatus

JP 2002-361990 A

Claims (3)

When an error of the apparatus is detected, in the image forming apparatus that shifts to the energy saving mode that operates while suppressing power consumption than the normal operation mode,
In the case of the energy saving mode, low power display means for displaying the display unit with lower power than in the normal operation;
A determination means for detecting an error and determining a usable function from the error content;
Control means,
The control means, in the energy saving mode, uses the low power display means to display the error content and the function determined to be usable by the determination means on the display unit so as to be selectable,
When any of the functions determined to be usable displayed on the display unit is selected , each setting related to the usable function is displayed on the display unit in a changeable manner.
When a change for the setting is input, to determine the site necessary change settings, turn on the power for the site necessary, the image forming apparatus, wherein the benzalkonium is returned to the normal operation mode. A security management means for setting a user security level and performing user management according to the security level;
Wherein, prior SL depending on the security level by the security manager, claim 1, characterized in that to display different screens or the default setting screen can not be set changes, the contents that can be configurable on the display unit The image forming apparatus described in 1. The low-power display means uses the partial area of the display section to display the error content and the function determined to be usable by the determination means on the display section so as to be selectable. Item 3. The image forming apparatus according to Item 1 or 2 .

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