| 摘要 |
A cursor control method for an electronic device. The electronic device comprises a detecting window and a cursor shown on a monitor. An object is disposed on the detecting window. A laser diode with a laser cavity is provided to generate a plurality of laser beams with different polarization in a plurality of continuous time periods. A first and a second laser beams are guided to the detecting window, to impinge on the object along first and second incident axes, which reflects the first and second laser beams causing them to re-enter the laser cavity. A converting unit converts the electric variation of laser cavity caused by a self-mixing effect and Doppler periods into first and second electric signals to determine the displacement of the cursor.
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