Patent ID: 9007346
Filing Date: 2015-04-14
Classification: G06F

Abstract:
1. A handwriting system, comprising: a first light source module for providing a first light to illuminate an object on a plane; a second light source module for providing a second light to illuminate the object on the plane, wherein the second light source module is disposed under the first light source module; an image sensing device disposed above the plane for capturing an image of the object reflecting the first light only or an image of the object reflecting the first and the second lights both; and a processing circuit electrically connected to the image sensing device for receiving the image captured by the image sensing device and generating control information according to light-spot information in the captured image; wherein the processing circuit is further configured to control a cursor on the display screen based on the position information of the object indicating that a position variation of the object relative to the handwriting system; wherein when the captured image has one light spot, a horizontal movement of the one light spot in the captured image represents a vertical movement of the cursor on the display screen and a vertical movement of the one light spot in the captured image represents a horizontal movement of the cursor on the display screen.