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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Bibliographic Details
Main Author OCHIAI TARO
Format Patent
LanguageEnglish
Published 19.01.2006
Subjects
BANDAGES, DRESSINGS OR ABSORBENT PADS
BLASTING
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
HEATING
HUMAN NECESSITIES
HYGIENE
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
LIGHTING
MECHANICAL ENGINEERING
MEDICAL OR VETERINARY SCIENCE
NON-PORTABLE LIGHTING DEVICES
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
PHYSICS
PROSTHESES
SIGNALLING
SYSTEMS THEREOF
TRAFFIC CONTROL SYSTEMS
TREATMENT OR PROTECTION OF EYES OR EARS
VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS
WEAPONS
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Summary: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 and causing no mixing discoloration to the whole body. SOLUTION: This signal lamp comprises red LED elements 3 circularly aligned on a circular printed board 2, and identification LED elements 5 aligned in this group of red LED elements 3 in X-shape. Therefore, color-blind people can discriminate the identification LED elements 5 even from a fixed distance. The chromaticity is set so as to cause no mixing discoloration to the whole body, or the luminance of the X-shape of the identification LED elements 5 is reduced, whereby healthy people can see the signal lamp with hardly feeling incompatibility similarly to a conventional red LED signal lamp, while the color-blind people can precisely recognize necessary information of lighting/extinguishing of the red LED signal lamp. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040196337