Optical scrolling module and optical control module

摘要

An optical scrolling module includes a prism, a light source, an image sensor and a first condenser. The prism is disposed at an opening of an upper shell of a mouse and has a light incident surface, a reflective surface, a contact surface and a light emitting surface. The contact and light incident surfaces are respectively connected between the reflective and light emitting surfaces. The contact surface is exposed by the opening. A light beam from the light source is transmitted to the contact surface via the light incident and reflective surfaces. When an object with a pattern structure puts on the contact surface, the light beam is scattered and 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.

主权项

1. An optical scrolling module for a mouse, the mouse having a housing and a circuit board disposed in the housing, the optical scrolling module comprising:
a light source disposed on the circuit board for providing a light beam; a light incident surface, a reflective surface and a contact surface, wherein the light incident surface is configured for the light beam to be incident on the light incident surface, and the contact surface is adapted for the light beam to pass through and be reflected by a finger; and an image sensor disposed on the circuit board, wherein all of the light beam is transmitted through the light incident surface and then reaches the reflective surface before reaching the contact surface and the finger, the light beam is scattered and reflected by the finger and then a portion of the light beam is transmitted to the image sensor, the light beam is reflected to the contact surface but the light beam is not emitted to the sensor when the finger is removed, the contact surface is a plane surface, and a depth of field of the first condenser is between 5 millimeters and 30 millimeters.