Patent US5343282A successfully refreshed from Google Patents.
US5343282A
Expired / Lapsed
US
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Color balance adjusting apparatus for full-color copier
Assignee: Sharp Corp
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Filing: 1993-07-30
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Granted: 1994-08-30
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Expires: 2013-07-30
Abstract
Abstract A color balance adjusting apparatus is used for a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image. The color balance adjusting apparatus includes an infrared sensor for detecting toner density of the toner image formed with a toner having any one color of the first, second and third colors. The apparatus further includes automatic adjustment means which determines a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and which determines optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity. Using this apparatus, automatic adjustment of the color balance for each copy mode can be effected in a short time with lesser consumption of electricity and supplies.
Inventors
- 👤 Yuichi Kazaki
- 👤 Yasutaka Maeda
- 👤 Hiroshi Kawamoto
- 👤 Hideyuki Nishimura
- 👤 Katsuhiro Nagayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/011
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance-adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity.
Claim 2
Dependent Claim
137 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance-adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity.
Claim 3
Dependent Claim
166 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said automatic adjustment means operates in link with an image density automatically controlling function and effects said automatic adjustment after an image density correction.
Claim 4
Dependent Claim
166 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said automatic adjustment means operates in link with an image density automatically controlling function and effects said automatic adjustment after an image density correction.
Claim 5
Dependent Claim
173 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjustment apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjusting means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said means uses the obtained optimal light intensity for three-colors and determines optimal light intensity for each of other copy modes belonging to the same copy process by using predetermined functions.
Claim 6
Dependent Claim
173 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjustment apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjusting means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said means uses the obtained optimal light intensity for three-colors and determines optimal light intensity for each of other copy modes belonging to the same copy process by using predetermined functions.
Claim 7
Dependent Claim
198 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said means uses the obtained optimal light intensity for three-colors and determines optimal light intensity for each of other copy modes belonging to the same copy process by using predetermined functions; and said automatic adjustment means operates in link with an image density automatically controlling function and effects said automatic adjustment after an image density correction.
Claim 8
Dependent Claim
198 words
A color balance adjusting apparatus for use in a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image, said color balance adjusting apparatus comprising: an infrared sensor for detecting toner density of said toner image formed with a toner having any one color of said first, second and third colors; and automatic adjustment means, determining a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and determining optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity, being characterized in that said means uses the obtained optimal light intensity for three-colors and determines optimal light intensity for each of other copy modes belonging to the same copy process by using predetermined functions; and said automatic adjustment means operates in link with an image density automatically controlling function and effects said automatic adjustment after an image density correction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-29 | 1998-02-28 | 1998-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-29 | 2002-02-28 | 2002-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-29 | 2006-02-28 | 2006-08-30 | $7700.00 | Window Closed / Lapsed |