Patent US4965449A successfully refreshed from Google Patents.
US4965449A
Expired / Lapsed
US
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Color information detecting device
Assignee: Canon Inc
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Filing: 1989-03-20
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Granted: 1990-10-23
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Expires: 2009-03-20
Abstract
Abstract In a colorimetric sensor having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light into an electrical signal and a color filter added to the photo-electric conversion element for transmitting light of a specific wave length region, each of the color sensors is composed of a plurality of polygonally split pieces radially extending and spreading from a central part of the colorimetric sensor. A color sensor of a relatively low sensitivity has a greater number of split pieces than others. Among these color sensors, a color sensor having the lowest sensitivity has its split pieces either partially or totally disposed in a position covering two sides of an angular corner part of the colorimetric sensor.
Inventors
- 👤 Masao Suzuki
- 👤 Ryosuke Miyamoto
- 👤 Nobuo Fukushima
- 👤 Takeshi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:09
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J3/513; H; H10; H10F; H10F77/00; H10F77/10; H10F77/14; H10F77/148; H10F77/30; H10F77/306; H10F77/331; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
A color information detecting device having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light of a specific wave length region wherein each of said plurality of color sensors is composed of a plurality of polygonally split pieces which radially extend and spread from a substantially central part of said color information detecting device and wherein, among said plurality of color sensors, a color sensor which has a relatively low sensitivity is arranged to have a greater number of said split pieces than other color sensors.
Claim 2
Dependent Claim
95 words
A color information detecting device having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light of a specific wave length region wherein each of said plurality of color sensors is composed of a plurality of polygonally split pieces which radially extend and spread from a substantially central part of said color information detecting device and wherein, among said plurality of color sensors, a color sensor which has a relatively low sensitivity is arranged to have a greater number of said split pieces than other color sensors.
Claim 3
Dependent Claim
46 words
A device according to claim 1, wherein part or all of split pieces of a color sensor having the lowest sensitivity among said plurality of color sensors is disposed in a position covering said sides of an angular corner part of said color information detecting device.
Claim 4
Dependent Claim
48 words
A device according to claim 1, wherein said color sensor which is disposed at the angular corner part or in the position covering two sides of said color information detecting device is arranged in a polygonal shape which has at least one sawtooth-like projection on each side thereof.
Claim 5
Dependent Claim
19 words
A device according to claim 1, wherein the color sensors include a color sensor for detecting a green color.
Claim 6
Dependent Claim
80 words
A color information detecting device having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light of a specific wave length region into an electrical signal, wherein each of said plurality of color sensors is composed of a plurality of polygonally split pieces which radially extend and spread from a substantially central part of said color information detecting device, and wherein said color information detecting device is formed in a circular shape.
Claim 7
Dependent Claim
80 words
A color information detecting device having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light of a specific wave length region into an electrical signal, wherein each of said plurality of color sensors is composed of a plurality of polygonally split pieces which radially extend and spread from a substantially central part of said color information detecting device, and wherein said color information detecting device is formed in a circular shape.
Claim 8
Dependent Claim
32 words
A device according to claim 1 or 5, wherein the plurality of color sensors include a color sensor for detecting a red color and a color sensor for detecting a blue color.
Claim 9
Dependent Claim
24 words
A device according to claim 1 or 5, wherein the respective color sensors are formed in a rotation symmetric shape around a common point.
Claim 10
Dependent Claim
93 words
A colorimetric sensor including a plurality of color sensors which extend in radial shape from a predetermined point and detect different specific wave length ranges of light, respectively, wherein the number of the color sensors which detect the light of the wave length range corresponding to relatively low sensitivity is larger than the number of the color sensors which detect the light of the other wave length range and the color sensor of the relatively low sensitivity is arranged between said color sensors which detect the light of the other wave length range.
Claim 11
Dependent Claim
93 words
A colorimetric sensor including a plurality of color sensors which extend in radial shape from a predetermined point and detect different specific wave length ranges of light, respectively, wherein the number of the color sensors which detect the light of the wave length range corresponding to relatively low sensitivity is larger than the number of the color sensors which detect the light of the other wave length range and the color sensor of the relatively low sensitivity is arranged between said color sensors which detect the light of the other wave length range.
Claim 12
Dependent Claim
22 words
A colorimetric sensor according to claim 8, wherein the lights of the specific wave length range include red, green and blue colors.
Claim 13
Dependent Claim
20 words
A colorimetric sensor according to claim 8, wherein the predetermined point resides at substantially central part of said colorimetric sensor.
Claim 14
Dependent Claim
23 words
A colorimetric sensor according to claim 8, wherein the respective color sensors are formed in a rotation symmetric shape around said predetermined point.
Claim 15
Dependent Claim
57 words
A colorimetric sensor including a plurality of color sensors which extend in a radial shape from a predetermined point and detect lights of different specific wave length ranges, wherein the color sensors for detecting the lights of the wave length ranges corresponding to the relatively low sensitivity and the other color sensors are arranged in alternate fashion.
Claim 16
Dependent Claim
57 words
A colorimetric sensor including a plurality of color sensors which extend in a radial shape from a predetermined point and detect lights of different specific wave length ranges, wherein the color sensors for detecting the lights of the wave length ranges corresponding to the relatively low sensitivity and the other color sensors are arranged in alternate fashion.
Claim 17
Dependent Claim
22 words
A colorimetric sensors according to claim 12, wherein the lights of the specific wave length range include red, green and blue colors.
Claim 18
Dependent Claim
20 words
A colorimetric sensor according to claim 12, wherein the predetermined point resides at substantially central part of said colorimetric sensor.
Claim 19
Dependent Claim
23 words
A colorimetric sensor according to claim 12, wherein the respective color sensors are formed in a rotation symmetric shape around said predetermined point.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |