{
  "$type": "site.standard.document",
  "description": "When the three-dimensional direction the head faces is detected by three axes, that is, a yaw angle that is an angle turning around an erect axis erected on the horizontal surface of the head, and a pitch angle and a roll angle that are angles formed by the above erect axis and two axes…",
  "path": "/patents/1076993",
  "publishedAt": "2005-06-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C19/00",
    "SONY CORP [JP]"
  ],
  "textContent": "When the three-dimensional direction the head faces is detected by three axes, that is, a yaw angle that is an angle turning around an erect axis erected on the horizontal surface of the head, and a pitch angle and a roll angle that are angles formed by the above erect axis and two axes perpendicular thereto, a gyro sensor 11 which detects the yaw angle from the integral value of the acceleration, a tilt sensor 12 which detects the inclination of a plane that intersects the direction of the erect axis at right angles, and calculation element 14 which calculates the pitch angle and the roll angle from the output of a tilt sensor are provided, so that the direction that the head faces can be detected with a simple detecting structure including the two sensors, in a head mounted display or the like.",
  "title": "METHOD AND DEVICE FOR HEAD TRACKING"
}