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US 4,726,675 AGranted
Color picture reproduction using balanced phosphors
AssigneeFuji Photo Film Co., Ltd.
InventorsKazuo Shiota, Toru Shinada, Hitoshi Urabe
Life of this patent
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Abstract
Color picture reproduction in which a monochromatic CRT having emissions in the blue, green and red regions successively displays blue, green and red picture signals. The separate color displays are filtered by blue, green and red filters before being imaged on a color print material. The phosphors of the CRT are selected to reduce the blue emissions below the green and red emissions.
Claims8
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, green picture, and red picture;
- and
- exposing a color photosensitive material successively to said blue picture, said green picture, and said red picture through a blue filter, a green filter, and a red filter respectively;
- wherein said CRT contains a fluorescent substance with a luminance wavelength distribution in which no peak in the blue luminance region is higher than any peak in the green luminous region and than any peak in the red luminous region.
1 more element
A color reproduction apparatus, comprising:
- a monochromatic CRT having luminance in a blue, a green and a red region;
- a color photosensitive material;
- and
- a blue, a green and a red filter, each selectively insertable between said CRT and said color photosensitive material;
- wherein said CRT contains a fluorescent substance with a luminance wavelength distribution in which no peak in the blue luminance region is higher than any peak in the green luminous region and than any peak in the red luminous region.
2 more elements
Dependencies are inferred from the claim text.