| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting control circuit for an electronic light emitting element capable of lighting the light emitting element as a stop lamp when a microcomputer is failed, while giving several kinds of lamp functions to one light emitting element when the microcomputer works normally. SOLUTION: When a stop lamp signal Sa is input to the microcomputer 21, the electronic light emitting elements 10a and 10b emit the light as the stop lamps. When the microcomputer 21 is failed, the stop lamp signal Sa is input to the electronic light emitting elements 10a and 10b through resistors R1 and R2 and diodes D1 and D2. When the microcomputer 21 works normally, since a third and a fourth npn transistors T2 and T4 are electrically continued, the stop lamp signal Sa is not directly input to the electronic light emitting elements 10a and 10b. COPYRIGHT: (C)2007,JPO&INPIT
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