Patent ID: 9213414
Filing Date: 2015-12-15
Classification: G06F

Abstract:
1. A portable computer, comprising: a keyboard section including a keyboard having a plurality of mechanically activated keys defining a keyboard active area; a display screen section, including a display screen, movably mounted to the keyboard section to provide different screen angles of the display screen section relative to the keyboard active area; a finger position sensing system configured to detect finger position on or near the active keyboard area, the finger position sensing system configured at least in part on the display screen section, wherein the finger position sensing system comprises a camera configured on or attached to move with the display screen section; and a processor which implements a finger position location algorithm using data from the camera and wherein the finger position location algorithm is adjusted to compensate for changes in the camera image due to the screen angle relative to the keyboard active area; and wherein the camera images a distinctive fixed position reference on the keyboard which moves relative to the display section and camera with the movement of the display screen section relative to the keyboard section and the processor recalibrates the finger position location algorithm to compensate for different screen angles using the location of the fixed position reference.