| 摘要 |
PURPOSE: A direct battery connected led lighting apparatus for vessel work is provided to extend the battery usage time by connecting the battery power without additional conversion device. CONSTITUTION: A power input unit(10) is inputted with the external battery power. A constant current driver integrated circuit part drives the input power source as the linear type constant current. An LED lighting display unit emits the light as being supplied with the output power. A emission detection unit outputs the emission control signal as the emission drops below the reference voltage. |
