OPTICAL INPUT DEVICE USING SIDE DIRECTIONAL LIGHT SOURCE

摘要

PURPOSE: An optical input apparatus is provided to reduce manufacturing costs by eliminating a high price prism or a fresnel lens. CONSTITUTION: A PCB(Printed Circuit Board)(110) includes an optical sensor(112) which senses light. A light source assembly(120) includes a side directivity and is connected with the PCB. A cover(160) is located on the upper side of the PCB, forms an object surface. A first light blocking unit(130) includes a guide hole and covers an optical sensor. The guide hole guides light reflected by the surface of a substitute and emitted from the light source assembly to the optical sensor. The light source assembly includes a light emitting device and a reflection board.