| 摘要 |
PURPOSE:To use a light emitting diode according to a rating without increasing circumferential temperature by approaching the light emitting diode with the use of a constant current diode, and serially connecting them. CONSTITUTION:A constant current diode 2 is serially connected with a light emitting diode 1. For example, for the titled LED indicating lamp, a printing plate 4 is accommodated inside a cylinder 3, the light emitting diode 1 is provided at the printing plate 4, the constant current diode 2 is also accommodated inside the cylinder 3, the diode 2 is serially connected with the light emitting diode 1, and the constant current diode 2 is provided so as to approximate the light emitting diode 1. The constant current diode 2 has few heating value, and does not increase the circumferential temperature. Thus, the light emitting diode 1 can be used according to the rating. |
