Optical navigation apparatus

Abstract

An optical navigation apparatus comprises a substrate with a sensor integrated circuit and an infrared source formed thereon; a sensor cover shielding the sensor integrated circuit and the infrared source; at least one visible light source formed outside the sensor cover and electrically connected with the substrate; a light guide located outside the sensor cover and covering the visible light source; and an outer housing covering the light guide and the substrate, and the outer housing comprises an infrared window and a side wall capable of guiding visible light towards and illuminating a region of the outer housing. In such an arrangement, the outer housing of the present invention is not only used as a casing for protection, but also served as light guide and distribution structure to reflect and re-distribute light sufficiently to achieve a uniform illuminated character shape.

Dependencies are inferred from the claim text.