Patent ID: 6337476
Filing Date: 2002-01-08
Classification: G02B,H04N

Abstract:
An image reading apparatus comprising:(a) a light source unit adapted to irradiate a target object placed on a flat plate, said light source unit having an LED unit that has at least one LED and at least one lead member, and a longitudinal light guide that has a longitudinal end attached to said LED unit; (b) a longitudinal frame having a hole adapted to receive said lead member of the LED unit therethrough, and to couple to said light source unit, wherein the hole is located at a longitudinal end of said longitudinal frame; (c) a sensor board adapted to receive said lead member of the LED unit, said lead member being soldered to said sensor board, thereby coupling said sensor board to said longitudinal frame; (d) a line sensor for converting light information from the target object irradiated by said light source unit into an image signal, wherein said line sensor is coupled onto said sensor board; and (e) a control circuit adapted to turn on at least one LED of the LED unit at a predetermined time.