EP0399668A2
Expired / Lapsed
EP
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An image recording apparatus
Assignee: Canon Inc
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Filing: 1990-04-27
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Granted: —
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Expires: 2010-04-27
Abstract
Abstract An image recording apparatus for recording an image in accordance with input image data supplied thereto using a recording head having a plurality of recording elements arranged thereon. The apparatus includes a sensor for detecting and determining non-uniformity of the densities of the records provided by the respective recording elements, at predetermined timing in image recording operations, and adjusting means for adjusting driving signals applied to the respective recording heads in response to an output of sensor.
Inventors
- 👤 Akio C/O Canon Kabushiki Kaisha Suzuki
- 👤 Hisashi C/O Canon Kabushiki Kaisha Fukushima
- 👤 Yoshihiro C/O Canon Kabushiki Kaisha Takada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:17
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/401; H04N1/4015
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
51 words
An image recording apparatus, comprising: recording means having plural recording elements; detecting means for detecting, at predetermined timing before an image recording operation, a density non-uniformity of records provided by the plural recording elements; and control means for controlling said recording means in accordance with an output of said detecting means.
Claim 2
Dependent Claim
51 words
An image recording apparatus, comprising: recording means having plural recording elements; detecting means for detecting, at predetermined timing before an image recording operation, a density non-uniformity of records provided by the plural recording elements; and control means for controlling said recording means in accordance with an output of said detecting means.
Claim 3
Dependent Claim
32 words
An apparatus according to Claim 1, wherein said detecting means includes means for recording a predetermined pattern using said recording means, and means for reading the predetermined pattern and producing electric signals.
Claim 4
Dependent Claim
14 words
An apparatus according to Claim 1, wherein said recording elements are elements ejecting ink.
Claim 5
Dependent Claim
20 words
An apparatus according to Claim 3, wherein said elements effect film boiling by thermal energy, by which ink is ejected.
Claim 6
Dependent Claim
26 words
An apparatus according to Claim 1, wherein said control means controls energy supplied to said recording element in accordance with the output of said detecting means.
Claim 7
Dependent Claim
23 words
An apparatus according to Claim 1, wherein the timing is determined in accordance with a number of recording operations by said recording means.
Claim 8
Dependent Claim
21 words
An apparatus according to Claim 1, wherein the timing is determined in accordance with a rest period of said recording means.
Claim 9
Dependent Claim
62 words
An image recording apparatus, comprising: recording means having a plurality of recording element; means for operating said recording means to record a predetermined pattern; means for automatically reading the predetermined pattern recorded by said recording means and for discriminating density non-uniformity of the recording elements; and control means for controlling said recording means in response to an output of said discriminating means.
Claim 10
Dependent Claim
62 words
An image recording apparatus, comprising: recording means having a plurality of recording element; means for operating said recording means to record a predetermined pattern; means for automatically reading the predetermined pattern recorded by said recording means and for discriminating density non-uniformity of the recording elements; and control means for controlling said recording means in response to an output of said discriminating means.
Claim 11
Dependent Claim
32 words
An apparatus according to Claim 8, wherein said detecting means includes means for recording a predetermined pattern using said recording means, and means for reading the predetermined pattern and producing electric signals.
Claim 12
Dependent Claim
14 words
An apparatus according to Claim 8, wherein said recording elements are elements ejecting ink.
Claim 13
Dependent Claim
20 words
An apparatus according to Claim 10, wherein said elements effect film boiling by thermal energy, by which ink is ejected.
Claim 14
Dependent Claim
28 words
An apparatus according to Claim 8, wherein said discriminating means includes a sensor, disposed adjacent said recording means, for reading the predetermined pattern recorded by the recording means.
Claim 15
Dependent Claim
12 words
An apparatus according to Claim 12, wherein said sensor includes CCD elements.
Claim 16
Dependent Claim
26 words
An apparatus according to Claim 8, wherein said control means controls energy supplied to said recording element in accordance with the output of said detecting means.
Claim 17
Dependent Claim
29 words
An apparatus according to Claim 8, wherein said predetermined pattern recording means is operated to record the predetermined pattern at timing associated with recording operation of said recording means.
Claim 18
Dependent Claim
23 words
An apparatus according to Claim 15, wherein the timing is determined in accordance with a number of recording operations by said recording means.
Claim 19
Dependent Claim
21 words
An apparatus according to Claim 15, wherein the timing is determined in accordance with a rest period of said recording means.
Claim 20
Dependent Claim
62 words
An image recording apparatus, comprising: recording means having a plurality of recording elements; means for operating said recording means to record a predetermined pattern in association with a recording operation of said recording means; means for reading the predetermined pattern recorded by said recording means and for discriminating a density non-uniformity of said recording elements on the basis of the recorded pattern.
Claim 21
Dependent Claim
62 words
An image recording apparatus, comprising: recording means having a plurality of recording elements; means for operating said recording means to record a predetermined pattern in association with a recording operation of said recording means; means for reading the predetermined pattern recorded by said recording means and for discriminating a density non-uniformity of said recording elements on the basis of the recorded pattern.
Claim 22
Dependent Claim
23 words
An apparatus according to Claim 18, further comprising means for controlling said recording means in accordance with an output of said discriminating means.
Claim 23
Dependent Claim
24 words
An apparatus according to Claim 18, wherein said discriminating means includes means for converting the reading of the predetermined pattern to an electric signal.
Claim 24
Dependent Claim
14 words
An apparatus according to Claim 18, wherein said recording elements are elements ejecting ink.
Claim 25
Dependent Claim
20 words
An apparatus according to Claim 21, wherein said elements effect film boiling by thermal energy, by which ink is ejected.
Claim 26
Dependent Claim
26 words
An apparatus according to Claim 19, wherein said control means controls energy supplied to said recording element in accordance with the output of said detecting means.
Claim 27
Dependent Claim
25 words
An apparatus according to Claim 18, wherein said recording means operating means is operated at timing associated with a recording operation of said recording means.
References Cited (Backward Citations)
No citation records indexed.
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