| 摘要 |
PURPOSE: An optical joystick module of a portable device is provided to prevent performance degradation of the light pointing module resulting from sweat produced between a subject and the cover plate. CONSTITUTION: An optical joystick module of a portable device comprises a cover plate(10), a ventilating unit(60), a holder, a lighting member, an imaging unit, and an image sensor. The cover plate on which a subject touches includes a non-transmissive part(12) and a transmissive part(14). The ventilating unit is formed on the cover plate surface. The holder is combined with the cover plate and has an accommodation space inside. The lighting member is installed on the outside surface of the holder and radiates light towards the subject. The imaging unit is installed inside the holder and images the light source which is refracted from the subject. The image sensor receives the light source delivered through the imaging unit and calculates it into a displacement. |
