| 摘要 |
PROBLEM TO BE SOLVED: To prevent breakage caused by a reverse voltage even if a reverse voltage is inputted into a light emitting section, by providing a protective element for protecting a luminous part against at least a reverse voltage to be possibly applied to the luminous part. SOLUTION: The p-side electrode 38 of an LED chip 3 is connected electrically to the negative electrode 59 of a protective diode chip 5. And the n-side electrode 39 of the LED chip 3 is connected electrically to the positive electrode 58 of the protective diode chip 5 through a resistor R. Moreover, both electrodes are connected to both electrode terminals 71, 72 of a power source 7. Incidentally, it is disirable that the resistor R should be provided to cause it to play the role of burdening a voltage drop, when an overvoltage of a forward or reverse voltage is applied. In this way, the LED chip 3 and the protective diode chip 5 are connected in inverse-parallel. |
