The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 1998
Filed:
Sep. 24, 1996
Hiroshi Sunagawa, Kanagawa, JP;
Atsushi Uejima, Kanagawa, JP;
Osamu Iwasaki, Kanagawa, JP;
Takaaki Aihara, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Respective light-emitting elements are caused to emit light at the maximum rated outputs and densities of three colors developed by a photosensitive material are made substantially uniform. The maximum rated outputs at light-emitting central wavelengths, of the three-color light-emitting elements are respectively 2.4 mW, 0.04 mW and 1.2 mW. The ratio between the outputs is represented as R:G:B=60:1:30. On the other hand, the ratio between spectral sensitivities of the most-frequently used photosensitive material is represented as R:G:B=1:30:2. An exposure-value ratio on the photosensitive material, which is synthetically obtained from these, reaches R:G:B=2:1:2. Thus, the numerical ratio among the light-emitting elements, for making exposure values uniform becomes R:G:B=1:2:1. The numbers of the respective light-emitting elements are defined so as to reach the least numbers from the numerical ratio (i.e., one R-light-emitting element, two G-light-emitting elements and one B-light-emitting element). Further, a repetition of R-G-B-G, R-G-G-B or the like is most suitable as the sequence of arrangement of the light-emitting elements.