Patent US6166751A successfully refreshed from Google Patents.
US6166751A
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Image forming apparatus
Assignee: Minolta Co Ltd
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Filing: 1996-08-05
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Granted: 2000-12-26
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Expires: 2016-08-05
Abstract
Abstract An image forming apparatus with toner saving mode is disclosed. This image forming apparatus comprising a normal ditheringing matrix and a toner saving mode ditheringing matrix having threshold data higher than that of the normal ditheringing matrix. The normal ditehring matrix is for image data processing under non-toner saving mode and the toner saving mode matrix is for image data processing under toner saving mode. The selection of the dithering matrix is executed by a central processing unit in response with the existance of order for toner saving. The processed image data processed by one of the dithreing matrix maintains the expression of linear tonality.
Inventors
- 👤 Hirokazu Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:04
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/405; H04N1/4055; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; H04N1/407; G06K2215/00; G06K2215/0002; G06K2215/0062; G06K2215/0071; G06K2215/0074
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
139 words
An image data processing device comprising: first processing means for processing input image data and for outputting the processed image data, said first processing means processing the input image data so that tone of the processed image data is substantially proportional to tone of the input image data; second processing means for processing input image data and for outputting the processed image data, said second processing means processing the input image data so that tone of the processed image data is substantially proportional to tone of said input image data, wherein tone of the image data processed by said second processing means is different from tone of the image data processed by said first processing means; and selecting means for selecting one of said first processing means and said second processing means based on a toner saving mode signal.
Claim 2
Dependent Claim
139 words
An image data processing device comprising: first processing means for processing input image data and for outputting the processed image data, said first processing means processing the input image data so that tone of the processed image data is substantially proportional to tone of the input image data; second processing means for processing input image data and for outputting the processed image data, said second processing means processing the input image data so that tone of the processed image data is substantially proportional to tone of said input image data, wherein tone of the image data processed by said second processing means is different from tone of the image data processed by said first processing means; and selecting means for selecting one of said first processing means and said second processing means based on a toner saving mode signal.
Claim 3
Dependent Claim
46 words
The image data processing device as claimed in claim 1, wherein each of said first processing means and said second processing means has a look-up table for generating the processed image data based on the input image data, the look-up tables being different from each other.
Claim 4
Dependent Claim
20 words
The image data processing device as claimed in claim 2, wherein each of said look-up tables is a dithering matrix.
Claim 5
Dependent Claim
31 words
The image data processing device as claimed in claim 3, wherein said dithering matrix of said first processing means has threshold data higher than threshold data of said second processing means.
Claim 6
Dependent Claim
26 words
The image data processing device as claimed in claim 1, wherein said second processing means has a converter for reducing tone of the input image data.
Claim 7
Dependent Claim
22 words
The image data processing device as claimed in claim 1, wherein said toner saving mode signal is input from an external apparatus.
Claim 8
Dependent Claim
20 words
The image data processing device as claimed in claim 6, wherein the image data is input from said external apparatus.
Claim 9
Dependent Claim
78 words
An image forming apparatus for forming an image on a recording material by using toning material, said image forming apparatus comprising: a processing circuit containing a first parameter and a second parameter, said processing circuit for converting input image data by using one of said first and second parameters; and a selector, for selecting said first parameter when a toner saving mode signal is absent, and for selecting said second parameter when the toner saving mode signal exists.
Claim 10
Dependent Claim
78 words
An image forming apparatus for forming an image on a recording material by using toning material, said image forming apparatus comprising: a processing circuit containing a first parameter and a second parameter, said processing circuit for converting input image data by using one of said first and second parameters; and a selector, for selecting said first parameter when a toner saving mode signal is absent, and for selecting said second parameter when the toner saving mode signal exists.
Claim 11
Dependent Claim
21 words
The image forming apparatus as claimed in claim 8, wherein said parameters are dithering matrices that are different from each other.
Claim 12
Dependent Claim
27 words
The image forming apparutus as claimed in claim 9, wherein said dithering matrix of said first parameter has threshold data lower than that of said second parameter.
Claim 13
Dependent Claim
33 words
The image forming apparatus as claimed in claim 8, wherein the toner saving mode signal is output to the selector when an amount of the toning material is less than a predetermined amount.
Claim 14
Dependent Claim
20 words
The image forming apparatus as claimed in claim 8, further comprising: canceling means for canceling the toner saving mode signal.
Claim 15
Dependent Claim
112 words
An image forming apparatus for forming an image onto an recording medium by using toning material, said image forming apparatus comprising: a processing circuit which converts tone of input image data represented by a plurality of bits into bit data representing black or white and outputs the bit data, said processing circuit including a first threshold data and a second threshold data, said processing circuit processing input image data using one of said first threshold data and said second threshold data; and a selector for selecting said first threshold data when a toner saving mode signal is absent, and for selecting said second threshold data when the toner saving mode signal exists.
Claim 16
Dependent Claim
112 words
An image forming apparatus for forming an image onto an recording medium by using toning material, said image forming apparatus comprising: a processing circuit which converts tone of input image data represented by a plurality of bits into bit data representing black or white and outputs the bit data, said processing circuit including a first threshold data and a second threshold data, said processing circuit processing input image data using one of said first threshold data and said second threshold data; and a selector for selecting said first threshold data when a toner saving mode signal is absent, and for selecting said second threshold data when the toner saving mode signal exists.
Claim 17
Dependent Claim
21 words
The image forming apparatus as claimed in claim 13, wherein the toner saving mode signal is input from an external apparatus.
Claim 18
Dependent Claim
26 words
The image forming apparatus as claimed in claim 13, wherein the toner saving mode signal is input from a switch provided on said image forming apparatus.
Claim 19
Dependent Claim
21 words
The image forming apparatus as claimed in claim 13, wherein said first threshold data is lower than said second threshold data.
Claim 20
Dependent Claim
33 words
The image forming apparatus as claimed in claim 13, wherein the toner saving mode signal is output to the selector when an amount of the toning material is less than a predetermined amount.
Claim 21
Dependent Claim
20 words
The image forming apparatus as claimed in claim 13, further comprising: canceling means for canceling the toner saving mode signal.
Claim 22
Dependent Claim
90 words
An image data processing device comprising: a processing circuit which converts tone of input image data represented by a plurality of bits into bit data representing black or white and outputs the bit data, said processing circuit including a first threshold data and a second threshold data higher than said first threshold data, said processing circuit converting input image data using one of said first threshold data and said second threshold data; and a selector for selecting one of said threshold data in accordance with a toner saving mode signal.
Claim 23
Dependent Claim
90 words
An image data processing device comprising: a processing circuit which converts tone of input image data represented by a plurality of bits into bit data representing black or white and outputs the bit data, said processing circuit including a first threshold data and a second threshold data higher than said first threshold data, said processing circuit converting input image data using one of said first threshold data and said second threshold data; and a selector for selecting one of said threshold data in accordance with a toner saving mode signal.
Claim 24
Dependent Claim
22 words
The image data processing device as claimed in claim 19, wherein the toner saving mode signal is input from an external apparatus.
Claim 25
Dependent Claim
27 words
The image data porcessing device as claimed in claim 19, wherein the toner saving mode signal is input from a switch provided on said image forming apparatus.
Claim 26
Dependent Claim
63 words
An image data processing device comprising: a converter which converts tone of input image data represented by a plurality of bits by shifting the input image data and outputs converted image data having a plurality of bits; and a comparator which compares the converted image data with a threshold data, and outputs bit data representing black or white in accordance with the comparison.
Claim 27
Dependent Claim
63 words
An image data processing device comprising: a converter which converts tone of input image data represented by a plurality of bits by shifting the input image data and outputs converted image data having a plurality of bits; and a comparator which compares the converted image data with a threshold data, and outputs bit data representing black or white in accordance with the comparison.
Claim 28
Independent Claim
72 words
A method of generating data from input image data, said method comprising the steps of: determining existence of a toner saving mode signal; converting image data into a first data by using a first parameter when the toner saving mode signal is absent; and converting image data into a second data by using a second parameter when the toner saving mode signal exists, said second data being different from said first data.
Claim 29
Independent Claim
72 words
A method of generating data from input image data, said method comprising the steps of: determining existence of a toner saving mode signal; converting image data into a first data by using a first parameter when the toner saving mode signal is absent; and converting image data into a second data by using a second parameter when the toner saving mode signal exists, said second data being different from said first data.
Claim 30
Dependent Claim
20 words
The method as claimed in claim 23, wherein each of the first parameter and the second parameter are threshold data.
Claim 31
Dependent Claim
23 words
The method as claimed in claim 24, wherein said threshold data of said first parameter is lower than that of said second parameter.
Claim 32
Dependent Claim
94 words
An image forming apparatus for forming an image onto a recording medium by using toning material, said image forming apparatus comprising: a detector which detects an amount of the toning material accommodate in the image forming apparatus; and a comparator utilizing a first parameter and a second parameter to process input image date; a selector which selects the first parameter to save consumption of the toning material when the detected amount is less than a predetermined amount, and which selects the second parameter when the detected amount is not less than the predetermined amount.
Claim 33
Dependent Claim
94 words
An image forming apparatus for forming an image onto a recording medium by using toning material, said image forming apparatus comprising: a detector which detects an amount of the toning material accommodate in the image forming apparatus; and a comparator utilizing a first parameter and a second parameter to process input image date; a selector which selects the first parameter to save consumption of the toning material when the detected amount is less than a predetermined amount, and which selects the second parameter when the detected amount is not less than the predetermined amount.
Claim 34
Dependent Claim
37 words
The image forming apparatus as claimed in claim 26, further comprising: canceling means for canceling the selection of said first parameter and selecting said second parameter even when the detected amount is less than a predetermined amount.
Claim 35
Dependent Claim
26 words
The image data processing device as claimed in claim 22, further comprising a selector for selecting said converter in accordance with a toner saving mode signal.
References Cited (Backward Citations)
US4698691A
Cited
US5646670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |