Patent ID: 8144124
Filing Date: 2012-03-27
Classification: G01D,G06F

Abstract:
1. An optical scrolling module for a mouse, the mouse having a housing and a circuit board disposed in the housing, an upper shell of the housing having an opening, the optical scrolling module comprising: a prism disposed at the opening and having a light incident surface, a reflective surface, a contact surface and a light emitting surface, the contact surface being connected between the reflective surface and the light emitting surface and being exposed by the opening, and the light incident surface being connected between the reflective surface and the light emitting surface and facing the circuit board; a light source disposed on the circuit board for providing a light beam; an image sensor disposed on the circuit board; and a first condenser disposed between the image sensor and the prism, wherein, the light beam is transmitted to the reflective surface via the light incident surface and is reflected to the contact surface by the reflective surface, when an object having a pattern structure contacts the contact surface, the light beam transmitted to the contact surface is scattered and then a portion of the light beam is transmitted to the image sensor via the first condenser, when the object is removed from the contact surface, the light beam is reflected to the light emitting surface by the contact surface.