| 摘要 |
PURPOSE:To irradiate a photosensitive drum with light quantity uniformly and properly by arranging electrode parts where light emitting elements are arranged at both a bare chip light emitting element and a surface mounted component light emitting element, and providing plural parts where bare chip light emitting elements are installed. CONSTITUTION:The device is equipped with a printed board 11 having an IC for light emitting diode(LED) driving and the electrode parts where LEDs are installed and the LEDs which are arranged on the electrode parts of the printed board 1. Then the bare chip LED 14A and surface mounted component LED 14B can be arranged at the electrode parts 18 where the LEDs are arranged and plural parts where the bar chip LEDs 14A are installed are provided. Consequently, the bare chip LED 14A or surface packaged component LED 14B can be arranged selectively at the electrode parts 18 of the printed board 11 and when the bare chip LEDs 14A are arranged, the photosensitive drum 1 which can be changed in fitting position according to the quantity of light emission of each chip is irradiated with the light quantity uniformly. |
