Ultra thin optical joystick and personal portable device having ultra thin optical joystick

An optical joystick comprising:

• a first waveguide including a first reflecting surface located below a reading area for sensing the movement of an object and a first plano-convex lens portion condensing light reflected from the first reflecting surface, in which the first reflecting surface and the first plano-convex lens portion form a single body;
• a second waveguide including a second plano-convex lens portion facing the first plano-convex lens portion and an outlet surface for passing light refracted at the second plano-convex lens portion, in which the second plano-convex lens portion and the outlet surface form a single body;
• and
• an image sensor located adjacent to the outlet surface.

A personal portable device comprising:

• a terminal body including a display module;
• a cover glass partially exposed from the terminal body for reading the movement of an object;
• a first waveguide including a first reflecting surface located below the cover glass and a first plano-convex lens portion condensing light reflected from the reflecting surface, in which the first reflecting surface and the first plano-convex lens portion form a single body;
• a second waveguide including a second plano-convex lens portion facing the first plano-convex lens portion and a second reflecting surface for reflecting light refracted at the second plano-convex lens portion, in which the second plano-convex lens portion and the second reflecting surface form a single body;
• an image sensor located below the second reflecting surface;
• and
• a control unit moving a pointer displayed on the display module according to the movement of the object read by the image sensor.