US4708448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color picture reproduction with cut-off blue spectrum
Assignee: Fujifilm Holdings Corp
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Filing: 1986-07-08
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Granted: 1987-11-24
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Expires: 2006-07-08
Abstract
Abstract Color print reproduction in which a monochromatic CRT with blue, green and red emissions successively displays a blue picture, a green picture and a red picture which are passed through blue, green and red filters respectively before exposing a color print material. At least the blue picture is also passed through a yellow filter in order to suppress the blue response of the green and red layers of the print material.
Inventors
- 👤 Hitoshi Urabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:20
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/506; H04N1/508
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A method of reproducing a color picture comprising the steps of: causing a monochromatic CRT having luminance in a blue, a green and a red region to successively emit light on the basis of a blue signal, a green signal, and a red signal for a scene to successively obtain a blue picture, a green picture, and red picture; and exposing a color photosensitive material successively to light of said blue picture, said green picture, and said red picture through a blue filter, a green filter and red filter respectively; wherein, the exposure by the light of said blue picture is performed in a wavelength region in which a peak of sensitivity to said blue light of a silver halide in said photosensitive material is cut-off in wavelength.
Claim 2
Independent Claim
128 words
A method of reproducing a color picture comprising the steps of: causing a monochromatic CRT having luminance in a blue, a green and a red region to successively emit light on the basis of a blue signal, a green signal, and a red signal for a scene to successively obtain a blue picture, a green picture, and red picture; and exposing a color photosensitive material successively to light of said blue picture, said green picture, and said red picture through a blue filter, a green filter and red filter respectively; wherein, the exposure by the light of said blue picture is performed in a wavelength region in which a peak of sensitivity to said blue light of a silver halide in said photosensitive material is cut-off in wavelength.
Claim 3
Dependent Claim
38 words
A method as recited in claim 1, wherein said step of exposing said color photosensitive material to said blue picture includes passing said blue picture through a color filter having a different transmission characteristic than said blue filter.
Claim 4
Dependent Claim
15 words
A method as recited in claim 2, wherein said color filter is a yellow filter.
Claim 5
Dependent Claim
33 words
A method as recited in claim 3, wherein said steps of exposing said color photosensitive material to said green and red picture include passing said green and red pictures through said yellow filter.
References Cited (Backward Citations)
US3693178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |