EP0862313A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image input/output system
Assignee: Canon Inc
•
Filing: 1998-02-26
•
Granted: —
•
Expires: 2018-02-26
Abstract
Abstract According to the invention, a power supply for an image sensing device is obtained from a printer to prevent consumption of the battery. When the image sensing device is connected to the printer, a power management unit checks if electric power can be supplied from the printer. When electric power can be supplied from the printer, the power management unit switches the power supply from the battery to a power supply receiving/supplying unit that receives electric power from the printer. In this case, if the remaining capacity on the battery is small, the battery is charged by electric power from the printer. Also, the luminance of a display unit is increased, or the operation frequency of a control unit is raised. On the other hand, when electric power cannot be supplied from the printer, the power management unit switches the power supply to the battery. In this case, the power management unit reduces consumption power by decreasing the luminance of the display unit or reducing the operation frequency of the control unit.
Inventors
- 👤 Kenji Takahashi
- 👤 Hisashi Ishikawa
- 👤 Hiroshi Tajika
- 👤 Miyuki Fujita
- 👤 Yuji Konno
- 👤 Hiroo Inoue
- 👤 Norihiro Kawatoko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:07
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00885; H04N1/00888; H04N1/00891; H04N1/00899; H04N1/00901; H04N1/00904
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
178 words
An image input/output system built by connecting
an image output device (118) and an image input device
(117),characterized by: said image output device (118) outputting an image
signal received from said image input device (117), and
supplying electric power to said image input device
(117), and said image input device (117) being connected to
said image output device (118) via a connection cable to
transmit image data to said image output device (118)
and to receive the electric power supplied from said
image output device (118), and having a power supply
unit (109), and a power supply control unit (108) for
determining whether to receive the electric power from
said image output device (118), for, when it is
determined that said image input device (117) can
receive the electric power from said image output device
(118), using the electric power from said image output
device (118), and for, when it is determined that said
image input device (117) cannot receive the electric
power from said image output device (118), using
electric power from said power supply unit (109).
Claim 2
Dependent Claim
59 words
The system according to claim 1, wherein said
power supply unit (109) comprises a rechargeable battery,
and said power supply control unit also detects a
remaining charge on said battery and charges said
battery using the electric power supplied from said
image output device (118) when the remaining charge on
said battery is not more than a predetermined value.
Claim 3
Dependent Claim
64 words
The system according to claim 2, wherein said
image input device (117) further comprises means (201)
for determining if no operation input has been made for
not less than a predetermined period of time, and when
it is determined that no operation input has been made
for not less than the predetermined period of time, said
power supply control unit (108) re-charges said battery.
Claim 4
Dependent Claim
71 words
The system according to claim 2, wherein when it
is determined that said image input device (117) cannot
receive the electric power from said image output device
(118), said power supply control unit (108) detects a
remaining charge on said battery (109), and when the
remaining charge on said battery is not more than a
predetermined value, said power supply control unit
(108) outputs a message indicating an insufficient
remaining charge.
Claim 5
Dependent Claim
22 words
The system according to claim 4, wherein said
image input device (117) further comprises a display
unit (105) for displaying the message.
Claim 6
Dependent Claim
58 words
The system according to claim 5, wherein said
image input device (117) further comprises display
control means (106) for, when said power supply control
unit (108) determines that the remaining charge on said
battery (109) is not more than the predetermined value,
adjusting brightness of a display on said display unit
(105) in correspondence with the remaining charge.
Claim 7
Dependent Claim
36 words
The system according to claim 5, wherein when the
remaining charge on said battery (109) is not more than
the predetermined value, said power supply control unit
(108) stops power supply to said display unit (105).
Claim 8
Dependent Claim
56 words
The system according to claim 5, wherein when said
image input device (117) can receive electric power from
said image output device (118), said display control
means (106) makes the display on said display unit (105)
brighter than when said image input device (117) is
driven by the electric power from said power supply unit
(109).
Claim 9
Dependent Claim
65 words
The system according to claim 1, wherein said
image input device (117) further comprises means (202)
for, when said image input device (117) can receive the
electric power from said image output device (118),
measuring a supplied electric power amount, and
optimizing an arithmetic operation speed of an image
processing operation of said image input device (117) in
accordance with the obtained electric power value.
Claim 10
Dependent Claim
67 words
The system according to claim 1, wherein said
image input device (117) and said image output device
(118) further comprise power switches, and said power
supply control unit (108) turns off power supplies of
both said image input device (117) and said image output
device (118) when said power switch of one of said image
input device (117) and said image output device (118) is
turned off.
Claim 11
Dependent Claim
74 words
The system according to claim 1, wherein said
image input device (117) and said image output device
(118) further comprise power switches, and said image
output device further comprises a power supply control
unit (108) for turning off power supplies of both said
image input device (117) and said image output device
(118) when said power switch of one of said image input
device (117) and said image output device (118) is
turned off.
Claim 12
Dependent Claim
36 words
The system according to claim 1, wherein said
power supply control unit (108) turns off a power supply
(109) of said image input device (117) when data
transfer to said image output device (118) is complete.
Claim 13
Dependent Claim
48 words
The system according to claim 1, wherein said
power supply control unit (108) cuts off power supply
(109) to the respective units (101-109) of said image
input device (117) except for said power supply control
unit (109) when data transfer to said image output
device (118) is complete.
Claim 14
Dependent Claim
26 words
The system according to claim 1, wherein said
image input device (117) and said image output device
(118) are connected via an interface complying with
IEEE1394.
Claim 15
Dependent Claim
103 words
An image input device characterized by comprising: connection means connected to an external
apparatus which exchanges data with a connected device,
and can supply electric power to the device; a power supply unit (109); and a power supply control unit (108) for checking if
electric power can be received from the external device,
for, when it is determined that the electric power can
be received from the external device, using the electric
power from the external device, and for, when it is
determined that the electric power cannot be received
from the external device, using electric power from said
power supply unit (109).
Claim 16
Dependent Claim
58 words
The device according to claim 15, wherein said
power supply unit (109) comprises a rechargeable battery,
and said power supply control unit (108) also detects a
remaining charge on said battery and charges said
battery using the electric power supplied from the
external device when the remaining charge on said
battery is not more than a predetermined value.
Claim 17
Dependent Claim
59 words
The device according to claim 16, further
comprising means for determining if no operation input
has been made for not less than a predetermined period
of time, and wherein when it is determined that no
operation input has been made for not less than the
predetermined period of time, said power supply control
unit (108) re-charges said battery (109).
Claim 18
Dependent Claim
66 words
The device according to claim 16, wherein when it
is determined that the electric power cannot be received
from the external device, said power supply control unit
(108) detects a remaining charge on said battery (109),
and when the remaining charge on said battery (109) is
not more than a predetermined value, said power supply
control unit (108) outputs a message indicating an
insufficient remaining charge.
Claim 19
Dependent Claim
16 words
The device according to claim 18, further
comprising a display unit (105) for displaying the
message.
Claim 20
Dependent Claim
52 words
The device according to claim 19, further
comprising display control means (106) for, when said
power supply control unit (108) determines that the
remaining charge on said battery (109) is not more than
the predetermined value, adjusting brightness of a
display on said display unit (105) in correspondence
with the remaining charge.
Claim 21
Dependent Claim
36 words
The device according to claim 19, wherein when the
remaining charge on said battery (109) is not more than
the predetermined value, said power supply control unit
(109) stops power supply to said display unit (105).
Claim 22
Dependent Claim
50 words
The device according to claim 19, wherein when the
electric power can be received from the external device,
said display control means (106) makes the display on
said display unit (105) brighter than when the image
input device is driven by the electric power from said
power supply unit (109).
Claim 23
Dependent Claim
52 words
The device according to claim 15, further
comprising means (202) for, when the electric power can
be received from the external device, measuring a
supplied electric power amount, and optimizing an
arithmetic operation speed of an image processing
operation of the image input device in accordance with
the obtained electric power value.
Claim 24
Dependent Claim
58 words
The device according to claim 15, wherein the
image input device and the external device further
comprise power switches, and the power supply control
unit (108) turns off power supplies of both the image
input device and the external device when said power
switch of one of the image input device and the external
device is turned off.
Claim 25
Dependent Claim
33 words
The device according to claim 15, wherein said
power supply control unit (108) turns off a power supply
(109) of said image input device when data transfer to
the external device is complete.
Claim 26
Dependent Claim
43 words
The device according to claim 15, wherein said
power supply control unit (108) cuts off power supply to
the respective units of the image input device except
for said power supply control unit (108) when data
transfer to said external device is complete.
Claim 27
Dependent Claim
13 words
The device according to claim 15, wherein said
connection means complies with IEEE1394.
Claim 28
Independent Claim
118 words
A method of controlling an image input device
(117), which has a power supply unit (109), is connected
to an external device, and is driven by, electric power
supplied from one of said external device and said power
supply unit (109), characterized by comprising: the determination step (302, 402) of checking if
electric power can be received from the external device;
and the power supply control step (304, 405) of using
the electric power from the external device when it is
determined that the electric power can be received from
the external device, and using electric power from said
power supply unit (109) when it is determined that the
electric power cannot be received from the external
device.
Claim 29
Dependent Claim
79 words
The method according to claim 28, wherein said
power supply unit (109) comprises a rechargeable battery,
and said method further comprises the full charging step
(310, 413) of detecting a remaining charge on said
battery when it is determined in the determination step
that the electric power can be received from the
external device, and re-charging said battery using the
electric power supplies from the external device when
the detected remaining charge is not more than a
predetermined value.
Claim 30
Dependent Claim
65 words
The method according to claim 29, further
comprising the step (308, 411) of determining if no
operation input has been made for not less than a
predetermined period of time, and wherein the full
charging step (310, 413) includes the step of
re-charging said battery when it is determined that no
operation input has been made for not less than the
predetermined period of time.
Claim 31
Dependent Claim
80 words
The method according to claim 28, wherein said
power supply unit (109) comprises a rechargeable battery,
and said method further comprises the display step (303,
304; 403, 404) of detecting a remaining charge on said
battery when it is determined in the determination step
that the electric power can be received from the
external device, and outputting a message indicating an
insufficient remaining charge to a display unit when the
detected remaining charge is not more than a
predetermined value.
Claim 32
Dependent Claim
55 words
The method according to claim 31, further
comprising the display control step (408) of adjusting
brightness of a display on said display unit (105) in
correspondence with the remaining charge when it is
determined in the determination step (302, 402) that the
remaining charge on said battery (109) is not less than
the predetermined value.
Claim 33
Dependent Claim
38 words
The method according to claim 31, wherein power
supply to said display unit (105) is stopped when it is
determined in the determination step that the remaining
charge on said battery is not less than the
predetermined value.
Claim 34
Dependent Claim
57 words
The method according to claim 31, wherein the
display on said display unit (105) is made to be
brighter than when the image input device is driven by
electric power from said power supply unit (109), when
it is determined in the determination step (302, 402)
that the electric power can be received from said
external device.
Claim 35
Dependent Claim
64 words
The method according to claim 28, further
comprising the step (406, 407) of measuring a supplied
electric power amount when it is determined in the
determination step (302, 402) that the electric power
can be received from the external device, and optimizing
an arithmetic operation speed of an image processing
operation of the image input device in accordance with
the obtained electric power value.
Claim 36
Dependent Claim
53 words
The method according to claim 28, wherein the
image input device and the external device further
comprise power switches, and power supplies of both the
image input device and the external device are turned
off when said power switch of one of the image input
device and the external device is turned off.
Claim 37
Dependent Claim
23 words
The method according to claim 28, wherein a power
supply (109) is turned off when data transfer to the
external device is complete.
Claim 38
Dependent Claim
34 words
The method according to claim 28, wherein power
supply to the respective units (101-107) except for a
power supply control unit (108) is cut off when data
transfer to the external device is complete.
Claim 39
Dependent Claim
20 words
The method according to claim 28, wherein the
image input device and the external device are connected
according to IEEE1394.
References Cited (Backward Citations)
No citation records indexed.
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