POINTING DEVICE OF PORTABLE APPARATUS

摘要

An optical pointing device for a mobile device is provided to keep a firm arrangement state against external shock by improving an assembly structure of a condenser and improve workability for installing the condenser and largely improve stability of the condenser installed in a holder by installing a stop holder and the condenser installed in the holder together at the same time. A holder is equipped with a receiving groove and a light source is installed in the receiving groove. A condenser comprises a pair of LGPs(Light Guide Plate)(32,36) for condensing light of the light source. A stop holder(50) includes a sliding groove(52) for facing and arranging the LGPs. An image sensor calculates a displacement value by capturing the light transferred through the LGPs. The stop holder includes a hanging sill(54) for arranging the LGPs at an interval. Each LGP includes a flange(35) formed around the circumference and hung to the hanging sill of the stop holder. Each LGP includes a reflection surface refracting the light of the light source and a lens for condensing the refracted light.