LIGHT EMITTING DIODE CIRCUIT FOR AUTOMOBILE DISPLAY LIGHT AND AUTOMOBILE LIGHT HAVING LIGHT EMITTING DIODE

摘要

PROBLEM TO BE SOLVED: To reduce an overheat effect of a diode by load resistance of a circuit by deciding the length of respective resistive wires so that the resistive wires control a power source current to the light emitting diode. SOLUTION: A resistive part is not contained in a printed circuit 13 of an automobile display light circuit to connect a network 12 of a light emitting diode to a power source by two connecting wires 14 and 15, and the whole resistive function is obtained by a power wire. A resistive wire having resistance larger than 1 Ω per 1 m is used for both or at least one of these two wires 14 and 15. The composition of the resistive wire is desirably an alloy of nickel and chrome. The length and a diameter of the resistive wire are decided by a required control resistance value. Heat is dispersively radiated by sheathing this resistive wire by an insulating material endurable to a required high temperature (for example, 205 deg.C) by continuous actuation.