JP2012019368A - Image preservation device - Google Patents

Image preservation device Download PDF

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Publication number
JP2012019368A
JP2012019368A JP2010155377A JP2010155377A JP2012019368A JP 2012019368 A JP2012019368 A JP 2012019368A JP 2010155377 A JP2010155377 A JP 2010155377A JP 2010155377 A JP2010155377 A JP 2010155377A JP 2012019368 A JP2012019368 A JP 2012019368A
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Japan
Prior art keywords
supplied
specific power
digital camera
connected
power
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Pending
Application number
JP2010155377A
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Japanese (ja)
Inventor
Hisashi Tai
寿 田井
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Nikon Corp
株式会社ニコン
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Priority to JP2010155377A priority Critical patent/JP2012019368A/en
Publication of JP2012019368A publication Critical patent/JP2012019368A/en
Application status is Pending legal-status Critical

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Abstract

When power is supplied from a battery of a mobile phone to a digital camera, consumption when the battery voltage of the mobile phone is converted into a predetermined voltage by a DC / DC converter of the digital camera and a video signal is output to an image display device Reduce power.
When a specific power source is detected and it is recognized that a personal computer 51 is connected to a USB interface 39 via a USB cable 54, the specific power supplied from the personal computer 51 is sent to the HDMI interface 40 as a connection recognition signal. The data is output to the television 52 via the connected HDMI cable 55. Therefore, the specific power supplied from the personal computer 51 is directly output to the television 52 via the digital camera 1 as it is. Therefore, the power consumption in the digital camera 1 is reduced to the extent that it is not necessary to convert the specific power supplied from the personal computer 51 by operating the DC / DC converter as in the conventional case.
[Selection] Figure 3

Description

  The present invention relates to an image storage apparatus including an interface unit connected to an external device via a connection line having a power supply line and a data communication line for performing data transmission.

  Conventionally, as this type of image storage device, for example, there is a digital camera disclosed in Patent Document 1. When this digital camera is connected to a mobile phone via a connection cable, data transfer is performed between the digital camera and the mobile phone via a data transfer line of the connection cable. By switching the changeover switch, power is supplied from the battery of the digital camera to the internal circuit of the mobile phone via the DC / DC converter via the power supply line of the connection cable, and from the battery of the mobile phone. Power is supplied to the internal circuit of the digital camera via a DC / DC converter. For this reason, even when the battery of either the digital camera or the mobile phone runs out, both devices can be used by supplying power to the other.

JP 2003-18441 A

  However, in the above-described conventional digital camera, when power is supplied from the battery of the mobile phone to the digital camera, an image display device such as a television to which a video signal having a voltage equal to the battery voltage of the mobile phone is input is newly added to the digital camera. Even when connected to a digital camera, the video signal obtained by converting the battery voltage of the mobile phone into a predetermined voltage by the DC / DC converter of the digital camera is output to the image display device. Useless power consumption occurs in the camera. In addition, the power used for the digital camera is generated by the digital camera when the battery of the digital camera is not depleted even when the power supply voltages of the mobile phone and the digital camera are equal. Will occur.

The present invention has been made to solve such problems,
Storage means for storing images;
A first interface unit that is connected to a first connection line having a specific power supply line and a data communication line and detects a specific power supplied from the specific power supply line, thereby recognizing connection of an external device;
A data communication line for transmitting data and a second connection line having a data communication line for transmitting a connection recognition signal having a voltage equal to that of the specific power source to the image display device are connected, and the image stored in the storage means is transmitted. A second interface unit for sending to the image display device via the data communication line;
When the specific power source is detected and it is recognized that the external device is connected to the first interface unit via the first connection line, the specific power source supplied from the external device is connected to the second interface unit. The image storage device is configured to include a control unit that outputs the connection recognition signal transmitted through the two connection lines to the image display device.

  According to this configuration, when the specific power source is detected and it is recognized that the external device is connected to the first interface unit via the first connection line, the specific power source supplied from the external device is connected to the connection recognition signal. And output to the image display device by the control unit via the second connection line connected to the second interface unit. For this reason, the specific power supplied from the external device is directly output to the image display device via the image storage device. Therefore, the power consumed in the image storage device is reduced by the amount that does not require voltage conversion of the specific power source supplied from the external device by operating the DC / DC converter as in the conventional case.

The present invention also includes a power generation circuit that generates an operating power supply having a voltage equal to that of the specific power supply, and an internal circuit that operates by being supplied with the operating power generated by the power generation circuit,
When the specific power is supplied to the first interface unit and the connection with the external device is recognized, the control unit stops generating the operation power by the power generation circuit and supplies the specific power to the internal circuit. To do.

  According to this configuration, when the specific power is supplied to the first interface unit and the connection with the external device is recognized, the generation of the operation power by the power generation circuit is stopped by the control unit and supplied from the external device. The specific power to be supplied is supplied to the internal circuit. For this reason, when the specific power is supplied to the first interface unit and the connection with the external device is recognized, the operation of the power generation circuit that generates the operation power to the internal circuit is stopped in the image storage device. The power consumed is reduced, and the power consumption of the image storage device can be further reduced.

  Further, according to the present invention, when the control unit is not supplied with the specific power to the first interface unit and the connection with the external device is not recognized, the operation power generated by the power generation circuit is used as the connection recognition signal in the second interface unit. It outputs to an image display apparatus via the 2nd connection line connected.

  According to this configuration, when the specific power is not supplied to the first interface unit and the connection to the external device is not recognized, the operation power generated by the power generation circuit in the image storage device is used as the connection recognition signal as the second interface unit. Is output by the control unit to the image display device via the second connection line connected to the. For this reason, even when the specific power is not supplied from the external device to the first interface unit, when the image display device is connected to the second interface unit via the second connection line, the power generation circuit in the image storage device The generated operating power is output as a connection recognition signal to the image display device, and the image display device can be made to recognize that the image storage device is connected.

  According to the image storage device of the present invention, as described above, the specific power source supplied from the external device does not need to be converted into a voltage by operating the DC / DC converter as in the prior art. The power consumed is reduced.

1 is a front perspective view and a rear view showing an outline of an external appearance of a digital camera according to an embodiment of the present invention. It is a block diagram which shows the outline of the electric circuit structure of the digital camera shown in FIG. FIG. 2 is a block diagram showing an outline of an electric circuit configuration in which the digital camera shown in FIG. 1 is connected to a personal computer via a USB interface and connected to a television via an HDMI interface. It is a block diagram which shows the outline of the electric circuit structure by which the conventional digital camera is connected with the personal computer via the USB interface, and is connected with the television via the HDMI interface.

  Next, an embodiment for carrying out the present invention when the image storage apparatus according to the present invention is applied to a digital camera will be described.

  FIG. 1A is a front perspective view showing an appearance of the digital camera 1 according to the embodiment.

  The digital camera 1 is provided with a lens 3 that guides light from a subject to an image sensor at the center of the front of the camera body 2. The lens 3 is provided integrally with the camera body 2 or exchangeable with another lens. A shutter button 4 is provided at the upper left of the lens 3 and a self-timer lamp 5 made of a light emitting diode (LED) is provided at the upper right. On the shoulder upper surface of the camera body 2 behind the shutter button 4 is provided a photographing information display panel 6 for displaying various information at the time of photographing, and various photographing modes are set on the opposite shoulder upper surface. A shooting mode dial 7 is provided for this purpose. In addition, an accessory shoe 8 for attaching accessories such as a lighting device that illuminates the subject is provided at the upper center of the camera body 2.

  FIG. 2B is a rear view showing the appearance of the digital camera 1 shown in FIG. In FIG. 4B, the same parts as those in FIG.

  The digital camera 1 includes a rear monitor 11 that displays an image, and an optical viewfinder 12 that allows a photographed image to be viewed by looking through the digital camera 1. The back monitor 11 is made of a TFT (Thin Film Transistor) liquid crystal or the like, and is disposed on the surface of the housing at the center of the back of the camera body 2. On the rear monitor 11, a so-called through image that is an image captured by the image sensor via the lens 3, a reproduced image, various information related to photographing, and the like are displayed.

  Further, on the left side of the rear monitor 11, a menu button 13 that is operated when displaying a menu screen for performing various settings of the digital camera 1 on the rear monitor 11, and an operation when displaying shooting information on the rear monitor 11. Information display button 14 to be displayed, reduction / thumbnail button 15 to be operated when the captured image displayed on the rear monitor 11 is reduced or displayed, and thumbnail button to be operated when the captured image is enlarged. 16 is provided.

  A command dial 17 for setting an exposure value, a shutter speed, ISO (International Organization for Standardization) sensitivity, and the like is provided on the upper right side of the camera body 2. A multi-selector 18 that performs an item selection operation or the like is provided. The multi-selector 18 includes an annular direction key 18a and a determination button 18b provided at the center thereof. The direction key 18a is pressed down in the up / down / left / right directions when the photographer selects an item to be set on the menu screen or the like displayed on the rear monitor 11. The determination button 18b is pressed when the direction key 18a is operated to determine the selected item. Note that the locations where these buttons are installed and the functions and roles provided for the buttons are merely examples, and can be changed as appropriate.

  FIG. 2 is a block diagram illustrating an outline of an electric circuit configuration of the digital camera 1.

  The digital camera 1 includes a CPU (Central Processing Unit) 21, a nonvolatile memory 22 including an EEPROM (Electrically Erasable Programmable Lead Only Memory), and a buffer memory 23 including a RAM (Random Access Memory). Yes. The nonvolatile memory 22 stores a control program that is referred to when the CPU 21 performs various controls. In accordance with a control program stored in the non-volatile memory 22, the CPU 21 controls each part of the circuit using the buffer memory 23 as a temporary storage work area and operates various device functions of the digital camera 1.

  Light from the subject is taken into the digital camera 1 through the lens 3 constituting the optical system. The lens 3 includes a plurality of lens groups including a zoom lens and a focus lens, and is illustrated as a single lens in FIG. The subject light captured in the digital camera 1 projects a subject image on the imaging surface 25 a of the imaging unit 25 disposed on the optical axis of the lens 3. The light receiving elements are two-dimensionally arranged on the imaging surface 25a. The imaging unit 25 includes a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor), and the like. The imaging unit 25 captures a subject image formed on the imaging surface 25a of the imaging unit 25 and converts it into an analog imaging signal. The imaging signal is subjected to gain adjustment by an AFE (analog front end) circuit 26 and converted into a digital signal.

  The image processing unit 27 acquires the imaging signal converted into a digital signal by the AFE circuit 26, performs image processing such as color interpolation processing, contour enhancement processing, and white balance processing on the acquired imaging signal and is captured. The image data of the obtained image is generated. The image data generated by the image processing unit 27 is subjected to compression processing, temporarily stored in the buffer memory 23 via the bus 28, and displayed on the rear monitor 11 as a through image.

  A shutter button 4, a power button 32, and a lens barrel drive unit 31 are connected to the CPU 21. When the shutter button 4 is half-pressed, the autofocus function is activated, and the lens barrel 3 is moved by the lens barrel drive unit 31 to automatically adjust the focal length. When the shutter button 4 is fully pressed, the shutter button 4 is not shown at a preset shutter speed. The shutter is opened, and the subject image is exposed to the imaging surface 25a of the imaging unit 25 for a predetermined time, and the subject is photographed. The photographed image data is recorded on a memory card 30 that constitutes a storage means for storing an image that is attached to and detached from a slot (not shown) via the recording I / F unit 29. When the power button 32 is operated, the 3V power generation circuit 34 converts the power supplied from the battery 33 to 3V and supplies the 3V power to the 3V internal circuit 36. The 5V power generation circuit 35 converts the power supplied from the battery 33 to 5V, and supplies the 5V power to the terminal a of the switch 38. The 5V power supply generation circuit 35 is connected to the CPU 21, and activates or stops the operation of converting the power supplied from the battery 33 to 5V according to a command from the CPU 21.

  Further, a switch 38 is connected to the CPU 21, and a USB interface (I / F) 39 and an HDMI (High Definition Multimedia Interface) interface (I / F) 40 are connected via the bus 28. The USB interface 39 is connected to an external device via a USB cable, and the HDMI interface 40 is connected to an image display device via an HDMI cable. The terminal c of the switch 38 is connected to the HDMI interface 40 and the 5V system internal circuit 37. When the terminal c of the switch 38 is connected to the terminal a according to a command from the CPU 21, 5V power is supplied from the 5V power generation circuit 35 to the HDMI interface 40 and the 5V internal circuit 37. When the terminal c of the switch 38 is connected to the terminal b, the USB interface 39 is connected to the HDMI interface 40 and the 5V internal circuit 37.

  FIG. 3 is a block diagram showing an outline of an electric circuit configuration in which the digital camera 1 is connected to a personal computer (personal computer) 51 via the USB interface 39 and is connected to the television 52 via the HDMI interface 40. In the figure, the same parts as those in FIG.

  When the personal computer 51 constituting the external device is connected to the USB interface 39 of the digital camera 1 via the USB cable 54, a specific power supply line and a specific power supply line provided to the USB cable 54 are supplied from the personal computer 51 with 5 V specific power and data. It is transmitted to the digital camera 1 via the data communication line. The USB cable 54 constitutes a first connection line having a specific power supply line and a data communication line. The personal computer 51 is connected to the USB interface 39 of the digital camera 1 via the USB cable 54, and the 5 V specific power of the personal computer 51 supplied from the specific power supply line of the USB cable 54 is detected by the CPU 21. And the digital camera 1 are recognized. The USB interface 39 constitutes a first interface unit that recognizes the connection of the personal computer 51 by detecting a 5 V specific power supplied from the specific power supply line to which the USB cable 54 is connected.

  When the television 52 constituting the image display device is connected to the HDMI interface 40 of the digital camera 1 via the HDMI cable 55, the image data stored in the memory card 30 of the digital camera 1 and the connection recognition signal of the voltage of 5V. Is transmitted to the television 52 via the data communication line provided in the HDMI cable 55. The HDMI cable 55 constitutes a second connection line having a data communication line for transmitting data and a data communication line for transmitting a connection recognition signal having a voltage of 5 V equal to the specific power source to the television 52. Also, the HDMI interface 40 is connected to the HDMI cable 55, and constitutes a second interface unit that transmits an image stored in the memory card 30 to the television 52 via a data communication line that performs data transmission.

  When the digital camera 1 is not connected to the personal computer 51, the terminal c of the switch 38 is connected to the terminal a. Therefore, the 5V power generated by the 5V power generation circuit 35 passes through the terminal a of the switch 38 to 5V. It is supplied to the system internal circuit 37 and also supplied to the television 52 connected to the digital camera 1 via the HDMI interface 40. The 5V power supply generation circuit 35 constitutes a power supply generation circuit that generates an operating power supply having a voltage equal to the 5V specific power supply supplied from the personal computer 5. The 5V internal circuit 37 constitutes an internal circuit that operates by being supplied with the operation power generated by the 5V power generation circuit 35. In addition, when the specific power is not supplied to the USB interface 39 and the connection with the personal computer 51 is not recognized, the CPU 21 is connected to the HDMI interface 40 using the 5V operation power generated by the 5V power generation circuit 35 as a connection recognition signal. A control unit that outputs to the television 52 via the HDMI cable 55 is configured.

  On the other hand, when recognizing that the digital camera 1 is connected to the personal computer 51, the switch 38 controls the terminal b from the state in which the terminal c is connected to the 5V power generation circuit 35 through the terminal a under the control of the CPU 21. To the state connected to the USB interface 39 via Therefore, the 5V specific power supplied from the personal computer 51 is supplied to the 5V internal circuit 37 through the terminal b of the switch 38 and directly to the television 52 via the HDMI interface 40. That is, when the CPU 21 constituting the control unit detects that the 5 V specific power source is detected and the personal computer 51 is connected to the USB interface 39 via the USB cable 54, the CPU 21 specifying the 5 V supplied from the personal computer 51 is specified. The power is output to the television 52 as a connection recognition signal transmitted by the HDMI cable 55 connected to the HDMI interface 40. When recognizing that the digital camera 1 is connected to the personal computer 51, the CPU 21 transmits a stop command to the 5V power generation circuit 35, and the 5V power generation circuit 35 performs an operation of converting the power of the battery 33 to 5V. Stop. That is, the CPU 21 constituting the control unit stops the generation of the operating power by the 5 V power generation circuit 35 when the 5 V specific power is supplied to the USB interface 39 and the connection with the personal computer 51 is recognized. The 5 V specific power source supplied from is supplied to the 5 V internal circuit 37.

  According to the digital camera 1 according to the present embodiment, when a specific power of 5V is detected and it is recognized that the personal computer 51 is connected to the USB interface 39 via the USB cable 54, the digital camera 1 is supplied from the personal computer 51. The 5 V specific power supply is output to the television 52 by the CPU 21 via the HDMI cable 55 connected to the HDMI interface 40 as a connection recognition signal. Therefore, the 5 V specific power supplied from the personal computer 51 is directly output to the television 52 via the digital camera 1 as it is.

  On the other hand, FIG. 4 is a block diagram showing an outline of an electric circuit configuration in which a conventional digital camera 60 is connected to the personal computer 51 via the USB interface 39 and is connected to the television 52 via the HDMI interface 40. In the figure, the same or corresponding parts as in FIG. In this conventional digital camera 60, the 5V power generation circuit 35 always sets the power of the battery 33 to 5V regardless of whether or not the specific power of 5V is supplied from the personal computer 51 and the connection with the personal computer 51 is recognized by the CPU 21. The 5V power converted by the 5V power generation circuit 35 is supplied to the 5V internal circuit 37 and to the television 52 via the HDMI cable 55. Therefore, in the present embodiment, when a 5 V specific power supply is detected and it is recognized that the personal computer 51 is connected to the USB interface 39 via the USB cable 54, the 5 V specific power supply supplied from the personal computer 51 is The power consumed in the digital camera 1 is reduced to the extent that it is not necessary to convert the voltage of the same power supply by operating the 5V power supply generation circuit 35 as in the prior art.

  Further, according to the digital camera 1 according to the present embodiment, when the specific power is supplied to the USB interface 39 and the connection with the personal computer 51 is recognized, the CPU 21 stops the generation of the operation power by the 5V power generation circuit 35. Then, the specific power supplied from the personal computer 51 is supplied to the 5V internal circuit 37. On the other hand, in the case of the conventional digital camera 60, as shown in FIG. 4, even when the specific power is supplied to the USB interface 39 and the connection with the personal computer 51 is recognized by the CPU 21, It continues to convert 33 power to 5V. Therefore, in this embodiment, when the specific power is supplied to the USB interface 39 and the connection with the personal computer 51 is recognized, the operation of the 5V power generation circuit 35 that generates the operation power to the 5V internal circuit 37 is stopped. Accordingly, the power consumed in the digital camera 1 is reduced, and the power consumption of the digital camera 1 can be further reduced.

  Further, according to the digital camera 1 according to the present embodiment, when the specific power is not supplied to the USB interface 39 and the connection with the personal computer 51 is not recognized, the operation power generated by the 5V power generation circuit 35 in the digital camera 1 is The CPU 21 outputs the connection recognition signal to the television 52 via the HDMI cable 55 connected to the HDMI interface 40. For this reason, even when the specific power is not supplied from the personal computer 51 to the USB interface 39, when the TV 52 is connected to the HDMI interface 40 via the HDMI cable 55, the USB interface 39 is generated by the 5V power generation circuit 35 in the digital camera 1. The operating power supply is output as a connection recognition signal to the television 52, so that the television 52 can recognize that the digital camera 1 is connected.

  In the present embodiment, the external device is the personal computer 51. However, a single external HD (hard disk), a USB hub that operates with AC power supplied, or the like may be used. In the present embodiment, the image display device is the television 52, but other image display devices that display images such as a photo viewer may be used.

  In the above embodiment, the case where the image storage device of the present invention is applied to a digital camera has been described. However, the mobile device such as a video camera, photo storage, and photo viewer, and other recorders such as a DVD recorder that receives AC power supply are described. The present invention can also be applied to an image storage device. Even when the present invention is applied to such an image storage device, the same effects as those of the above-described embodiment can be obtained.

1 ... Digital camera 21 ... CPU
DESCRIPTION OF SYMBOLS 30 ... Memory card 33 ... Battery 34 ... 3V power supply generation circuit 35 ... 5V power supply generation circuit 36 ... 3V system internal circuit 37 ... 5V system internal circuit 38 ... Switch 39 ... USB interface 40 ... HDMI interface 51 ... PC 52 ... Television 54 ... USB cable 55 ... HDMI cable

Claims (3)

  1. Storage means for storing images;
    A first interface unit that is connected to a first connection line having a specific power supply line and a data communication line and detects a specific power supplied from the specific power supply line;
    A data communication line for transmitting data and a second connection line having a data communication line for transmitting a connection recognition signal having a voltage equal to that of the specific power source to the image display device are connected, and the image stored in the storage means is transmitted as data. A second interface unit for sending to the image display device via the data communication line,
    When the specific power source is detected and it is recognized that the external device is connected to the first interface unit via the first connection line, the specific power source supplied from the external device is used as the second power source. An image storage device comprising: a control unit that outputs to the image display device as the connection recognition signal transmitted by the second connection line connected to the interface unit.
  2. The image storage device according to claim 1,
    A power generation circuit that generates an operation power supply having a voltage equal to that of the specific power supply, and an internal circuit that operates by being supplied with the operation power generated by the power generation circuit,
    When the specific power is supplied to the first interface unit and the connection with the external device is recognized, the control unit stops the generation of the operation power by the power generation circuit so that the specific power is An image storage device characterized by being supplied to a circuit.
  3. The image storage device according to claim 2,
    When the specific power is not supplied to the first interface unit and connection with the external device is not recognized, the control unit uses the operation power generated by the power generation circuit as the connection recognition signal as the second interface. An image storage device that outputs to the image display device via the second connection line connected to a unit.
JP2010155377A 2010-07-08 2010-07-08 Image preservation device Pending JP2012019368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010155377A JP2012019368A (en) 2010-07-08 2010-07-08 Image preservation device

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Application Number Priority Date Filing Date Title
JP2010155377A JP2012019368A (en) 2010-07-08 2010-07-08 Image preservation device

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JP2012019368A true JP2012019368A (en) 2012-01-26

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11168686A (en) * 1997-12-04 1999-06-22 Nikon Corp Image output device
JP2001211274A (en) * 2000-01-26 2001-08-03 Fuji Xerox Co Ltd Image-forming device and its control method
JP2002094873A (en) * 2000-09-14 2002-03-29 Fuji Photo Film Co Ltd Digital camera
JP2002149284A (en) * 2000-11-14 2002-05-24 Konica Corp Storage apparatus
JP2007034374A (en) * 2005-07-22 2007-02-08 Canon Inc Power source supply control method
JP2007226326A (en) * 2006-02-21 2007-09-06 Canon Inc Direct print system
JP2007268967A (en) * 2006-03-31 2007-10-18 Noritsu Koki Co Ltd Image forming apparatus
JP2010154241A (en) * 2008-12-25 2010-07-08 Canon Inc Communication apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11168686A (en) * 1997-12-04 1999-06-22 Nikon Corp Image output device
JP2001211274A (en) * 2000-01-26 2001-08-03 Fuji Xerox Co Ltd Image-forming device and its control method
JP2002094873A (en) * 2000-09-14 2002-03-29 Fuji Photo Film Co Ltd Digital camera
JP2002149284A (en) * 2000-11-14 2002-05-24 Konica Corp Storage apparatus
JP2007034374A (en) * 2005-07-22 2007-02-08 Canon Inc Power source supply control method
JP2007226326A (en) * 2006-02-21 2007-09-06 Canon Inc Direct print system
JP2007268967A (en) * 2006-03-31 2007-10-18 Noritsu Koki Co Ltd Image forming apparatus
JP2010154241A (en) * 2008-12-25 2010-07-08 Canon Inc Communication apparatus

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