Hauptman Ham, LLP
Optical navigation system and detection method thereof adapted for ambient light and liftoff detection
There is provided an optical navigation system including a light source, a first photosensitive unit, a second photosensitive unit, a control unit and a processing unit. The light source is configured to emit light of a predetermined wavelength. The first photosensitive unit is configured to receive reflected light of the predetermined wavelength reflected by a working surface. The second photosensitive unit is covered with a coating to block light of the predetermined wavelength. The control unit is configured to control the light source, the first photosensitive unit and the second photosensitive unit to expose both the first photosensitive unit and the second photosensitive unit when the light source is turned on. The processing unit is configured to read first image data and second image data respectively from the first photosensitive unit and the second photosensitive unit thereby identifying an ambient light mode or a liftoff mode.
PixArt Imaging Inc.
G Y G G G
G06F Y02D G06F G09G G09G
inventional additional inventional inventional additional
Yu-Ju
Lee