Patent ID: 11921940
Assignee: PIXART IMAGING INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 1:
2. The optical navigation device of claim 1, wherein the first surface operation condition is a glass surface operation condition corresponding to a glass surface while the second surface operation condition is a non-glass surface operation condition corresponding to a non-glass surface; the processing circuit determines that the optical navigation device is placed on the glass surface if the detected image quality of the image pattern with the image features is low and the detected frame average brightness is high; the processing circuit determines that the optical navigation device is placed on the non-glass surface if the detected image quality of the image pattern with the image features is high; and, the processing circuit determines that the optical navigation device is lifted if the detected image quality of the image pattern with the image features is low and the detected frame average brightness is low.