LED ROAD TRAFFIC SIGNAL LAMP
PROBLEM TO BE SOLVED: To provide a LED road traffic signal lamp which hardly gives incompatibility to healthy people by performing, to a red or yellow LED signal lamp which confuses color-blind people, mark patterning by a chromaticity discriminable by the color-blind people from a fixed distance an...
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Main Author | |
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Format | Patent |
Language | English |
Published |
19.01.2006
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Subjects | |
Online Access | Get full text |
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