US4692773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming method using image forming elements having different concentrations and pitches
Assignee: Canon Inc
•
Filing: 1986-01-02
•
Granted: 1987-09-08
•
Expires: 2006-01-02
Abstract
Abstract A method for forming images with a gradation characteristic based on the arrangement of image forming elements comprises modulating an arrangement pitch of the image forming elements in at least one arrangement direction without quantization in accordance with the gradation level.
Inventors
- 👤 Asao Saito
- 👤 Kunio Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/40; H04N1/40025; H04N1/40031; H04N1/40087
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different pitches therebetween in different areas of the image; and selecting the concentrations of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 2
Independent Claim
103 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different pitches therebetween in different areas of the image; and selecting the concentrations of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein the image forming elements are ink dots formed by inks having different dye concentrations.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein said image forming elements are provided in a plurality of colors and in a plurality of concentrations for each color.
Claim 5
Dependent Claim
18 words
A method according to claim 3, wherein one of the colors of the image forming elements are black.
Claim 6
Dependent Claim
29 words
A method according to claim 3, wherein the colors of the image forming elements are selected from the group consisting of cyan, magenta, yellow, red, green, blue and black.
Claim 7
Independent Claim
108 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different areas and different pitches therebetween in different areas of the image; and selecting the concentrations and areas of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 8
Independent Claim
108 words
A method of forming on a medium an image with areas having different light-reflecting properties providing different optical reflection densities, the method comprising: providing on the medium a plurality of image forming elements, at least one color of which is provided in different concentrations, with different areas and different pitches therebetween in different areas of the image; and selecting the concentrations and areas of said image forming elements and the pitch thereof in accordance with the optical reflection densities of respective areas of the image to be formed, wherein the pitches of higher concentration image forming elements are greater than the pitches of lower concentration image forming elements.
Claim 9
Dependent Claim
21 words
A method according to claim 6, wherein the image forming elements are ink dots formed by inks having different dye concentrations.
Claim 10
Dependent Claim
26 words
A method according to claim 6, wherein said image forming elements are provided in a plurality of colors and a plurality of concentrations for each color.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein one of the colors of the image forming elements are black.
Claim 12
Dependent Claim
29 words
A method according to claim 8, wherein the colors of the image forming elements are selected from the group consisting of cyan, magenta, yellow, red, green, blue and black.
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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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |