SCANNER
PROBLEM TO BE SOLVED: To provide a scanner which can reduce chromaticity dispersion on a document face by using blue LED for correction even if the chromaticity dispersion is large in an illumination optical system using a plurality of pseudo white LEDs.SOLUTION: Prescribed blue LED 9 in a second bl...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
20.03.2014
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a scanner which can reduce chromaticity dispersion on a document face by using blue LED for correction even if the chromaticity dispersion is large in an illumination optical system using a plurality of pseudo white LEDs.SOLUTION: Prescribed blue LED 9 in a second blue LED 9 is illuminated with an appropriate light emission amount so that balance of red output, green output and blue output of a line sensor 21 when a pseudo white LED 8 is lighted can be within a prescribed range. |
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Bibliography: | Application Number: JP20130051107 |