Patent ID: 8614694

Claim:
A touch screen system, comprising: a touch screen corresponding to a Descartes coordinate system XOY; a first image capturing unit and a second image capturing unit arranged at two adjacent sides of the touch screen correspondingly and substantially perpendicular to each other, wherein the first image capturing unit comprises a first housing and a first camera housed in the first housing, an optical axis of the lens of the first camera is substantially perpendicular to the X axis of the coordinate system, and the touch screen is located on the optical axis of the lens of the first camera, the first image capturing unit is configured to capture an image of the touch screen along the Y axis; the second image capturing unit comprises a second housing and a second camera housed in the second housing, an optical axis of the lens of the second camera is perpendicular to the Y axis, and the touch screen is located on the optical axis of the lens of the second camera, the second image capturing unit is configured to capture an image of the touch screen along the X axis, the first image capturing unit and the second image capturing unit are two-dimensional image capturing units; and a processing unit configured to pre-store two images of the touch screen respectively captured by the two-dimensional image capturing units and the two pre-stored images are references for determining the X and Y coordinates of the touched point, the processing unit further configured to identify a touched point on the touch screen and determine an X coordinate of the touched point in the system XOY according to the pre-stored image taken by the first image capturing unit, and a Y coordinate of the touch point in the system XOY according to the pre-stored image taken by the second image capturing unit, and executing a function corresponding to the X and Y coordinates of the touched point.