Ultra thin optical joystick and personal portable device having ultra thin optical joystick
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United States of America Patent
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N/A
Issued Date -
Feb 23, 2006
app pub date -
Jul 26, 2005
filing date -
Aug 20, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical joystick includes 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, 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, and an image sensor located below the second reflecting surface. The first reflecting surface and the first plano-convex lens portion form a single body, and the second plano-convex lens portion and the second reflecting surface also form a single body. The reflecting surface and the lens portion are in a single body, thereby notably reducing the thickness of the optical joystick. The first and second waveguides are facing each other, thereby improving refraction and condensing light.
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