| 摘要 |
PURPOSE: An error detecting circuit and method are provided to protect a base of a transistor by connecting a resistance between one or more comparators and the transistor and controlling a current applied to the base of the transistor. CONSTITUTION: A light emitting device array(220) comprises one or more strings. A detecting resistance(230) is parallely connected to the light emitting device array. A comparator(240) determines error of the light emitting device array by comparing detecting voltage applied to the detecting resistance with reference voltage. A transistor(250) outputs an error detecting signal based on a determination result of the comparator. A controller(260) stops operation of a light emitting device deriving integrated circuit when receiving the error detecting signal. |
