JP2004017298A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in which power supply mode can be switched at a high speed while preventing useless power consumption. <P>SOLUTION: Power supply mode from a power supply to a circuit element 30a of a printer controller 30 is switched by turning clock supply to the circuit element 30a of the printer controller 30 on/off after passing through a PLL circuit 51. Since clock supply to the circuit element 30a of the printer controller 30 can be turned on/off arbitrarily, useless power consumption can be prevented. Since clock supply to the circuit element 30a of the printer controller 30 is turned on/off after passing through the PLL circuit 51, a regulated clock can be supplied immediately when clock supply to the circuit element 30a of the printer controller 30 is resumed and thereby the power supply mode can be switched at a high speed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image forming apparatus such as a printer, a copying machine, and an MFP (Multi Function Peripheral).
[0002]
[Prior art]
2. Description of the Related Art In recent years, energy conservation of image forming apparatuses such as printers, copiers, and MFPs (Multi Function Peripherals) has become a major issue due to environmental problems, international energy star standards, and the like. Therefore, in an image forming apparatus such as a printer or an MFP, when a processing command is not received within a predetermined time, the mode is shifted to an energy saving mode to reduce power consumption. As a transition to the energy saving mode, for example, when there is no data input from the host PC for a certain period of time, a sleep mode in which power supply to a circuit is partially stopped is entered, and a new connection to the network I / F is made. 2. Description of the Related Art There is known a printer including means for returning to a normal operation mode when data is input.
[0003]
[Problems to be solved by the invention]
However, in the conventional method, the energy saving mode is switched when an access to an image forming apparatus such as a printer or an MFP does not occur within a predetermined period of time. In such situations, wasteful power is consumed before switching.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an image forming apparatus that can prevent wasteful power consumption and can speed up switching of a power supply mode.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, a printer engine, a printer controller that converts print information into output image data and outputs the output image data to the printer engine, and is provided in the printer controller and adjusts a phase difference between an input clock and an output clock. A power supply for supplying power to the printer engine and the printer controller; and a clock supply to the circuit elements of the printer controller after passing through the PLL circuit. Mode switching means for switching a power supply mode relating to power supply to a circuit element of the controller.
[0006]
Therefore, by arbitrarily turning ON / OFF the clock supply to the circuit elements of the printer controller, the power supply mode relating to the power supply from the power supply device to the circuit elements of the printer controller is switched. This makes it possible to immediately switch the power supply mode in a situation where it is known that access has not been performed for a while, and thus it is possible to prevent wasteful power consumption. Further, since the clock supply to the circuit elements of the printer controller after passing through the PLL circuit is turned ON / OFF, even if the clock supply to the circuit elements of the printer controller is temporarily interrupted, the clock is supplied to the PLL circuit. When restarting the clock supply to the circuit elements of the printer controller, the adjusted clock can be supplied immediately. This makes it possible to speed up the switching of the power supply mode.
[0007]
According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the ON / OFF operation of the clock supply to the circuit element of the printer controller is performed by switching a switch.
[0008]
Therefore, the power supply mode relating to the power supply from the power supply device to the circuit elements of the printer controller can be arbitrarily switched by a simple operation.
[0009]
According to a third aspect of the present invention, in the image forming apparatus according to the second aspect, when there is a switching operation of the switch, a notification unit for notifying that the power supply mode is to be switched, and the power supply mode notified by the notification unit And confirmation means for accepting confirmation of the switching of.
[0010]
Therefore, the user can confirm the switching operation of the power supply mode, thereby preventing a malfunction.
[0011]
According to a fourth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the operating frequency of the supply clock in the energy saving mode can be switched.
[0012]
Therefore, when it is not necessary to operate the circuit at high speed as in the energy saving mode, a clock having a low operating frequency can be supplied to the circuit, thereby improving the operation efficiency and durability of the circuit. Improvement can be achieved.
[0013]
According to a fifth aspect of the present invention, in the image forming apparatus according to the fourth aspect, when the operating frequency of the supply clock is switched in the energy saving mode, a frequency switching notification unit for notifying that the operating frequency of the supply clock is switched, and Frequency switching confirming means for receiving confirmation of switching of the operating frequency of the supply clock notified by the frequency switching notifying means.
[0014]
Therefore, the user can check the switching operation of the operating frequency of the supply clock, and thus can prevent a malfunction.
[0015]
According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the first to fifth aspects, the image forming apparatus further includes an image reading unit that reads an image and outputs image data. An image based on the image is formed on a recording medium.
[0016]
Therefore, a copying machine or an MFP having the same effect as the invention according to any one of claims 1 to 5 can be obtained.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The present embodiment is an example in which an MFP (Multi Function Peripheral) is applied as an image forming apparatus. The MFP according to the present embodiment has a composite function such as a digital color copying function, a printer function, a scanner function, and a facsimile function.
[0018]
FIG. 1 is an explanatory diagram schematically showing an MFP 1 according to the present embodiment. As shown in FIG. 1, the MFP 1 includes a color printer 2, a scanner serving as an image reading unit 3, an automatic document feeder (ADF) 4, an operation panel for displaying to an operator and performing function setting input control from the operator. P and a post-processing device (sorter) 5 are provided. Further, the MFP 1 is connected to a PC 6 such as a personal computer (hereinafter referred to as a PC) via a communication line 7 such as a LAN (Local Area Network) or a parallel I / F or an IEEE1284 I / F. The MFP 1 is configured such that, when print data as print information is provided from the PC 6 through the communication line 7, an image based on the print data can be printed out (image output) by the color printer 2. Further, the MFP 1 is connected to a public telephone network via a private branch exchange (PBX) 8, and can communicate with a remote facsimile via the public telephone network.
[0019]
The scanner 3 is a well-known technique, and is not particularly shown. A light receiving element (for example, a CCD (Charge Coupled Device)) is provided in a sensor board unit (SBU) in the scanner 3, and an image signal converted into an electric signal in the CCD is converted into a digital signal, that is, a read signal on the SBU. After being converted into image data, the image data is output to a printer controller 30 (see FIG. 3) described later. The automatic document feeder 4 mounted on such a scanner 3 feeds and discharges documents to and from the scanner 3.
[0020]
Next, the color printer 2 will be described. FIG. 2 is an explanatory diagram illustrating a schematic configuration of the color printer 2 that forms a part of the MFP 1. As shown in FIG. 2, the color printer 2 is an electrophotographic laser scanning type color printer, and includes a printer engine 9, a paper feeder (bank) 10, a double-sided paper feeder 11, and a post-processing device (sorter) 5. It is constituted by.
[0021]
The printer engine 9 will be briefly described. The laser scanner 12 of the printer engine 9 is provided with image data decomposed into components of Bk (black), Y (yellow), M (magenta), and C (cyan) in units of each color. Each color unit is one image forming unit.
[0022]
At the time of monochrome recording, image data of one of the above four colors is supplied to the laser scanner 12. The photoconductor 13 is driven to rotate at a constant speed, charged by the main charger 14, and the charged potential is adjusted to an appropriate potential by a quenching lamp (not shown). The laser scanner 12 scans and projects the laser modulated by the image data on the charged surface. As a result, an electrostatic latent image corresponding to the image data is formed on the photoconductor 13. The electrostatic latent image is developed by a developing device (Bk) having a developing toner of a color corresponding to the designated image formation color (for example, Bk) of the developing device 15 of the rotary positioning system, and becomes a visible image, that is, a toner image. . The toner image is transferred to the transfer belt 17 by the transfer charger 16, and then transferred to the transfer paper fed by the registration roller 19 by the transfer separation charger 18. The transfer paper carrying the toner image is transferred by the transport belt 20. It is sent to the fixing device 21. The fixing device 21 fixes the toner image on the transfer paper to the transfer paper by applying heat and pressure. The transfer paper after fixing is discharged to the sorter 5.
[0023]
After the transfer of the toner image, the surface of the photoconductor 13 is cleaned by the cleaning device 22. The surface of the transfer belt 17 on which the transfer has been completed is wiped by the cleaning blade 23. Reference numeral 24 denotes a reflection type optical sensor called a P sensor for detecting the toner density on the surface of the photoconductor 13, 25 denotes a reflection type optical sensor for detecting a mark indicating the reference position of the transfer belt 17, and 26 denotes a fixing device. A temperature sensor for detecting the temperature of the fixing roller 21a.
[0024]
Note that in the case of color superimposition recording of two or more colors (most typical is full-color recording), the above-described formation of the toner image on the photoconductor 13 and transfer to the transfer belt 17 are repeated for each color, so that the transfer is performed. The toner images of the respective colors are superimposedly transferred on the belt 17, and are transferred onto the transfer paper after the completion of the superimposed transfer for the required colors.
[0025]
Next, an internal circuit 30a, which is a circuit element built in the printer controller 30 that controls each unit of the color printer 2 and is built in the MFP 1, will be described with reference to FIG. The internal circuit 30a of the printer controller 30 includes a controller ASIC (Application Specific IC) 42 for performing system bus control, image processing, and the like. The controller ASIC 42 has a CPU (Central Processing Unit) 31 as a main processor, an SDRAM (Synchronous Dynamic Random Access Memory) 32 for temporarily storing image data read from the scanner 3, and image data stored in the SDRAM 32. An engine controller 33 for controlling the printer engine 9 for forming an image, an HDD (Hard Disk Drive) 34 serving as a storage device for storing a large amount of image data and a job history, and a read-only memory storing a BIOS and the like. A program for controlling the entire system including a printer, a facsimile, and a scanner, such as a ROM (Read Only Memory) 35, a CARD 36, and a Font 37. A program device, an NVRAM 38 for recording system logs / system settings / log information, and the like, which can hold data even when the power is turned off, an NIC (Network Interface Card) 39 for connecting the MFP 1 to the communication line 7, An FCU 40, which is a unit for performing facsimile control, an IEEE 128441 for transferring data using a plurality of signal lines simultaneously, and an operation panel controller 43 for controlling the operation panel P are connected. The engine controller 33, the FCU 40, and the IEEE1284 41 are connected to the controller ASIC 42 via the PCI bus 44.
[0026]
With such a configuration, the printer controller 30 analyzes print data, which is image information from the outside (PC 6, FCU 40), and a command to instruct printing, and develops the bit map into a state in which the print data can be printed as output image data. The operation is determined by analyzing the print mode from the command. The print data and the command are received through the NIC 39 or the IEEE 1284 41 to operate. The printer controller 30 sends print data and document read data stored in the SDRAM 32 and the HDD 34, output image data obtained by processing these for output, and compressed data obtained by compressing them to the outside (PC 6, FCU 40). Can be transferred.
[0027]
Further, the printer controller 30 transfers the image data read by the scanner 3 to the controller ASIC 42 and degrades the signal due to the quantization into the optical system and the digital signal (signal deterioration of the scanner system: distortion of the read image data due to the scanner characteristics). ) Is corrected, and the image data is written into the SDRAM 32. The image data stored in the SDRAM 32 in this manner is converted into output image data by the engine controller 33 and output to the color printer 2.
[0028]
In such an MFP 1, there is a power supply device (not shown) that generates a DC power supply from an AC commercial power supply, and the generated DC power supply is supplied to each unit built in the MFP 1. If such a MFP 1 does not receive a processing command within a certain time, it shifts to an energy saving mode (hereinafter, referred to as an energy saving mode) in order to reduce power consumption. In general, in the energy saving mode, the power supply is classified, and power is not supplied to circuits that are not required during standby, and power is supplied to only necessary circuits. As a result, power consumption is considerably reduced. However, normally, the energy saving mode is switched when no access occurs to the MFP 1 within a predetermined time. Under this condition, in the situation where it is originally known that there is no access for a while, the switching to the energy saving mode is performed. Unnecessary power is consumed. Therefore, the MFP 1 of the present embodiment realizes a mode switching unit that can directly switch to the energy saving mode separately from the switching of the power supply mode from the normal operation mode to the energy saving mode when the normal operation is not performed for a certain period of time. ing. Hereinafter, the mode switching means will be described in detail.
[0029]
A clock (hereinafter, CLK1) for operating the internal circuit 30a is externally input to the internal circuit 30a which is a circuit element built in the printer controller 30 as described above. As shown in FIG. 4, the input CLK1 is clock-adjusted so that the clock phase of the external input passes through the PLL circuit 51 and the internal clock output from the PLL circuit 51 matches (hereinafter, CLK2). Then, the phase-adjusted CLK2 is branched into two, one is output to the frequency dividing circuit 52 and frequency-divided to a frequency suitable for use of various devices (hereinafter, CLK3), and the other is output to the selector 53. Is done. Further, CLK3 divided by the frequency dividing circuit 52 is also output to the selector 53. That is, in the present embodiment, one of CLK2 and CLK3 is selected by selector 53 (hereinafter, CLK4).
[0030]
More specifically, the operating frequency of the clock to the internal circuit 30a can be arbitrarily switched by the selector 53. For example, when it is desired to operate the internal circuit 30a at high speed in the normal operation mode, the output CLK2 from the PLL circuit 51 is selected, and CLK2 is supplied to the internal circuit 30a. Conversely, when it is not necessary to operate the internal circuit 30a at a high speed, such as in the energy saving mode, the operation efficiency is improved and the durability is improved by using CLK3 which passes through the frequency dividing circuit 52 and has a sufficiently low operating frequency. Can be improved.
[0031]
In the present embodiment, the case where there is one clock supply source has been described, but the present invention is not limited to this. When there are a plurality of clock supply sources, a selector is prepared for each PLL circuit and frequency divider circuit of each clock, and each output from this selector is connected to another selector to select CLK2 and CLK3 of each clock arbitrarily. You should be able to do it. Thereby, the selection range of the clock frequency used for the internal circuit 30a is widened, and a more appropriate clock can be supplied to the internal circuit 30a.
[0032]
In addition, between the selector 53 and the internal circuit 30a, there is provided a switch 54 capable of turning on / off the connection between the selector 53 and the internal circuit 30a. That is, when the switch 54 is turned off, the clock supply to the internal circuit 30a can be cut off while the clock is supplied to the PLL circuit 51 and the frequency dividing circuit 52. Therefore, when returning from the energy saving mode, the adjusted clock (CLK4) can be supplied to the internal circuit 30a immediately. As a result, it is not necessary to newly create a circuit for interrupting the clock supply, and the cost of the circuit can be suppressed. That is, according to the present embodiment, the clock supply to internal circuit 30a can be arbitrarily and easily cut off without consuming unnecessary power.
[0033]
In particular, the speed of image processing in recent years has been increasing, and accordingly, the operating frequency of a clock inside a circuit has been dramatically increased. As described above, the PLL circuit 51 requires an adjustment period because the rising of the external clock and the clock after the circuit through are synchronized, but the higher the clock frequency, the more difficult the phase adjustment becomes, and the longer the adjustment period becomes. Therefore, the supply of the clock to the internal circuit 30a is cut off while the clock is supplied to the PLL circuit 51, whereby the power supply mode can be switched at a high speed.
[0034]
As described above, the power consumption can be suppressed by using the switch 54, but when the user actually switches, a means for the switching is required. Therefore, in the MFP 1 of the present embodiment, as one of the processes executed by the CPU 31 provided in the printer controller 30 based on the control program, a mode switching process for realizing the switching of the power supply mode is performed.
[0035]
FIG. 5 is a flowchart schematically showing the flow of the mode switching process. As shown in FIG. 5, when the energy saving mode is set by operating a mode switching key for energy saving switching prepared in advance on the operation panel P (step S1), the process proceeds to step S2 to determine whether to perform mode switching. Is displayed on the operation panel P, and the user is confirmed to switch to the energy saving mode. In this way, when the user sets the energy saving mode, the message for confirmation is displayed again, so that the setting can be canceled when the mode switching key for energy saving switching is operated by mistake. To do that. Therefore, when the mode switching key for energy saving switching is operated by mistake (N in step S2), the normal operation mode is set without switching to the energy saving mode (step S3).
[0036]
On the other hand, when the user confirms switching to the energy saving mode by operating the operation panel P (Y in step S2), the setting mode is displayed on the operation panel P (step S4: notification means), and the user is notified of the energy saving mode. The setting is confirmed (step S5: confirmation means).
[0037]
Here, the setting mode displayed on the operation panel P will be described. As described above, when a plurality of clocks are supplied, a notification for confirming whether to switch the supplied clock, a notification of which clock is to be selected, and a notification of confirming that the clock is being executed are provided. There is a need to do. Therefore, as shown in FIG. 6, an operation mode for each clock is prepared as a setting mode displayed on the operation panel P, and the user is prompted to set which operation mode to operate (step S21). When the user determines that the setting is not changed (N in step S22), a normal operation clock is supplied (step S23), and when the user determines that the setting is changed (step S22). Y), the user is notified of whether there is any problem with the setting (step S24: frequency switching notifying means), and if there is no problem (Y of step S25: frequency switching checking means), a clock for the setting is supplied. The display is switched to the setting mode display (step S26). If there is a problem (N in step S25, Y in step S27: frequency switching confirmation means), the user is prompted to set the operating clock to be used again (step S21).
[0038]
As a result, when it is not necessary to operate the circuit at high speed as in the energy saving mode, a clock having a low operating frequency can be supplied to the circuit, thereby improving the operation efficiency and the durability of the circuit. Can be achieved.
[0039]
Thereafter, when the setting of the energy saving mode is confirmed by the operation of the operation panel P by the user (Y in step S5), the switch 54 is turned off to confirm that the clock is not supplied to the internal circuit 30a ( Step S6), a message indicating the completion of the switching is displayed on the operation panel P (Step S7), so that the user can confirm the completion of the mode switching.
[0040]
As a result of the confirmation of the setting of the energy saving mode, if resetting is necessary (N in step S5, Y in step S8), the process returns to step S4, and if the mode switching is unnecessary (step S5). N, N in step S8), the normal operation mode is set without switching to the energy saving mode (step S3).
[0041]
After the mode is switched to the energy saving mode as described above, if the mode release key for energy saving switching prepared in advance on the operation panel P is operated to set the normal operation mode (step S9), the process proceeds to step S10. Then, a message notifying whether to cancel the mode is displayed on the operation panel P, and the user is confirmed to cancel the energy saving mode. The reason for displaying the confirmation message again when the user performs the setting for canceling the energy saving mode is that the setting can be canceled when the mode cancel key is operated by mistake. is there. Therefore, when the mode release key is operated by mistake (N in step S10), the energy saving mode is not released.
[0042]
On the other hand, when the user confirms the release of the energy saving mode by operating the operation panel P (Y in step S10), the energy saving mode is released (step S11), and the normal operation mode is set (step S3).
[0043]
Here, since the clock supply to the internal circuit 30a of the printer controller 30 can be arbitrarily turned ON / OFF, the power supply mode can be switched immediately in a situation where it is known that access will not be performed for a while, and wasteful power consumption will occur. Can be prevented. Further, since the clock supply to the internal circuit 30a of the printer controller 30 after passing through the PLL circuit 51 is turned ON / OFF, even if the clock supply to the internal circuit 30a of the printer controller 30 is temporarily interrupted, the clock remains in the PLL circuit 51. Since the clock is supplied, when the clock supply is resumed to the internal circuit 30a of the printer controller 30, the adjusted clock can be supplied immediately, so that the power supply mode can be switched faster. .
[0044]
【The invention's effect】
According to the first aspect of the invention, a printer engine, a printer controller that converts print information into output image data and outputs the output image data to the printer engine, and a phase difference between an input clock and an output clock provided in the printer controller A power supply for supplying power to the printer engine and the printer controller, and ON / OFF of a clock supply to circuit elements of the printer controller after passing through the PLL circuit. A mode switching unit for switching a power supply mode related to power supply to the circuit elements of the printer controller, whereby the clock supply to the circuit elements of the printer controller can be arbitrarily turned ON / OFF, so that it is understood that access is not taken for a while. State In such, it can be switched quickly feeding mode, it is possible to prevent wasteful power consumption. Further, since the clock supply to the circuit elements of the printer controller after passing through the PLL circuit is turned ON / OFF, even if the clock supply to the circuit elements of the printer controller is once interrupted, the clock is supplied to the PLL circuit. When the clock supply is resumed to the circuit elements of the printer controller, the adjusted clock can be supplied immediately, so that the power supply mode can be switched at high speed.
[0045]
According to the second aspect of the present invention, in the image forming apparatus according to the first aspect, the ON / OFF operation of clock supply to the circuit element of the printer controller can be arbitrarily performed by a simple operation by performing a switch operation. The power supply mode related to the power supply from the power supply device to the circuit elements of the printer controller can be switched.
[0046]
According to the third aspect of the present invention, in the image forming apparatus according to the second aspect, when there is a switching operation of the switch, a notification unit for notifying that the power supply mode is to be switched, and a notification by the notification unit. By providing a confirmation unit that receives confirmation of switching of the power supply mode, the user can confirm the switching operation of the power supply mode, so that a malfunction can be prevented.
[0047]
According to the fourth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the operating frequency of the supply clock in the energy saving mode can be switched, so that the circuit can be switched as in the energy saving mode. When it is not necessary to operate the circuit at a high speed, a clock having a low operating frequency can be supplied to the circuit, whereby the operation efficiency and the durability of the circuit can be improved.
[0048]
According to the fifth aspect of the present invention, in the image forming apparatus according to the fourth aspect, when the operation frequency of the supply clock is switched in the energy saving mode, a frequency switching notification for notifying that the operation frequency of the supply clock is switched is provided. Means, and a frequency switching confirming means for receiving confirmation of switching of the operating frequency of the supply clock notified by the frequency switching notifying means, the user can confirm the switching operation of the operating frequency of the supply clock. Therefore, malfunction can be prevented.
[0049]
According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the first to fifth aspects, there is provided an image reading unit that reads an image and outputs image data, and the image reading unit reads the image. By forming an image based on data on a recording medium, it is possible to obtain a copying machine or an MFP having the same operational effects as the invention according to any one of the first to fifth aspects.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram schematically showing an MFP according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating a schematic configuration of a color printer constituting a part of the MFP.
FIG. 3 is a block diagram illustrating a configuration of an internal circuit of the printer controller.
FIG. 4 is a block diagram illustrating clock supply to an internal circuit of the printer controller.
FIG. 5 is a flowchart schematically showing a flow of a mode switching process.
FIG. 6 is a flowchart schematically showing a flow of an operation clock setting process.
[Explanation of symbols]
1 Image forming apparatus
3 Image reading unit
9 Printer Engine
30 Printer controller
30a Circuit element of printer controller
51 PLL circuit
54 switch

Claims (6)

A printer engine,
A printer controller that converts print information into output image data and outputs the output image data to the printer engine;
A PLL circuit provided in the printer controller for adjusting a phase difference between an input clock and an output clock;
A power supply for supplying power to the printer engine and the printer controller;
Mode switching means for switching a power supply mode for power supply to the circuit elements of the printer controller from the power supply device by ON / OFF of clock supply to the circuit elements of the printer controller after passing through the PLL circuit. An image forming apparatus comprising: 2. The image forming apparatus according to claim 1, wherein ON / OFF operation of clock supply to circuit elements of the printer controller is performed by switching a switch provided in the apparatus. Notifying means for notifying that the power supply mode is to be switched when the switch is operated,
Confirmation means for receiving confirmation of switching of the power supply mode reported by the reporting means;
The image forming apparatus according to claim 2, further comprising: 4. The image forming apparatus according to claim 1, wherein an operation frequency of a supply clock in an energy saving mode can be switched. Frequency switching notifying means for notifying that the operating frequency of the supply clock is to be switched when switching the operating frequency of the supply clock in the energy saving mode;
Frequency switching confirmation means for receiving confirmation of switching of the operating frequency of the supply clock notified by the frequency switching notification means,
The image forming apparatus according to claim 4, further comprising: 6. The image processing apparatus according to claim 1, further comprising: an image reading unit that reads an image and outputs image data, wherein an image based on the image data read by the image reading unit is formed on a recording medium. Image forming device.

Images