Patent US3290751A successfully refreshed from Google Patents.
US5751925A
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Image processing apparatus
Assignee: Canon Inc
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Filing: 1997-07-08
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Granted: 1998-05-12
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Expires: 2017-07-08
Abstract
Abstract An image processing apparatus comprises a memory for storing image data to be formed into an image, a memory holding unit for holding the content of the memory, and a control unit for stopping the memory holding operation by memory holding unit during a stand-by period of the image forming operation.
Inventors
- 👤 Hiromi Kataoka
- 👤 Shunichi Masuda
- 👤 Tetsuo Saito
- 👤 Kazuma Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:13
CPC Classifications
G; G06; G06K; G06K15/00; G06K2215/00; G06K2215/0082; G06K2215/0085
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
123 words
An image processing apparatus having a sleep mode and at least one other mode, comprising: a dynamic memory for storing image data to be formed into an image; an image forming unit including a CPU for forming an image based on the image data stored in said dynamic memory; a refreshing circuit for refreshing said dynamic memory; and control means for controlling the refreshing operation of said refreshing circuit, said control means inhibiting the refreshing operation during the sleep mode of said image processing apparatus; wherein said CPU includes means for receiving a clock signal and is adapted to operate at a speed corresponding to frequency of the clock signa, and wherein in the sleep mode the clock signal has a low frequency.
Claim 2
Dependent Claim
123 words
An image processing apparatus having a sleep mode and at least one other mode, comprising: a dynamic memory for storing image data to be formed into an image; an image forming unit including a CPU for forming an image based on the image data stored in said dynamic memory; a refreshing circuit for refreshing said dynamic memory; and control means for controlling the refreshing operation of said refreshing circuit, said control means inhibiting the refreshing operation during the sleep mode of said image processing apparatus; wherein said CPU includes means for receiving a clock signal and is adapted to operate at a speed corresponding to frequency of the clock signa, and wherein in the sleep mode the clock signal has a low frequency.
Claim 3
Dependent Claim
39 words
An image processing apparatus according to claim 1, further comprising means for timing a time from completion of the image processing and for setting the sleep mode when the time timed by said timing means exceeds a predetermined time.
Claim 4
Dependent Claim
17 words
An image processing apparatus according to claim 1, further comprising release means for releasing the sleep mode.
Claim 5
Dependent Claim
24 words
An image processing apparatus according to claim 3, wherein said apparatus releases the sleep mode in response to a command from an external apparatus.
Claim 6
Dependent Claim
23 words
An image processing apparatus according to claim 3, wherein said apparatus releases the sleep mode in response to a manipulation of an operator.
Claim 7
Dependent Claim
36 words
An image processing apparatus according to claim 1, further comprising means for converting data sent from an external apparatus into bit map image data, wherein the bit map image data is written into said dynamic memory.
Claim 8
Dependent Claim
24 words
An image processing apparatus according to claim 6, wherein said image forming unit forms an image in accordance with the bit map image data.
Claim 9
Dependent Claim
48 words
An image processing apparatus according to claim 1, wherein said image forming unit comprises means for timing a time from a completion of printing operation and for setting the sleep mode when the time timed by said timing means exceeds a predetermined time without receiving a print request.
Claim 10
Dependent Claim
55 words
An image processing apparatus according to claim 1, further comprising means for outputting one of a plurality of clock signals having different frequencies to said receiving means of said CPU, wherein in the sleep mode, a clock signal having a low frequency is output from said outputting means to said receiving means of said CPU.
Claim 11
Dependent Claim
19 words
An image processing apparatus according to claim 9, further comprising means for informing set mode to said control means.
Claim 12
Dependent Claim
16 words
An image processing apparatus according to claim 7, wherein said control means comprises a second CPU.
Claim 13
Dependent Claim
72 words
An image processing apparatus according to claim 11, wherein said control means further comprises second outputting means for outputting one of a plurality of clock signals having different frequencies to said second CPU, said second CPU operating at a speed corresponding to a clock signal from said second outputting means, wherein in the sleep mode, a clock signal having a low frequency is output from said outputting means to said second CPU.
Claim 14
Dependent Claim
22 words
An image processing apparatus according to claim 6, wherein said image forming means comprises a printer engine for printing in electrophotographic method.
Claim 15
Dependent Claim
47 words
An image processing apparatus according to claim 6, further comprising a flyback convert circuit and a forward convert circuit, wherein the flyback convert circuit is used for power supply in the sleep mode and the forward convert circuit is used for power supply is said other mode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |