{
  "$type": "site.standard.document",
  "description": "ÄProblemÜ To provide a simple-structured angle detecting apparatus and a projector utilizing a line-type passive range-finding device for use on the camera or the like. ÄMeans for ResolutionÜ A control circuit (5) computes a relative horizontal inclination angle between a screen (1) and a projector…",
  "path": "/patents/1089478",
  "publishedAt": "2004-02-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C3/10",
    "SEIKO PRECISION KK [JP]"
  ],
  "textContent": "ÄProblemÜ To provide a simple-structured angle detecting apparatus and a projector utilizing a line-type passive range-finding device for use on the camera or the like. ÄMeans for ResolutionÜ A control circuit (5) computes a relative horizontal inclination angle between a screen (1) and a projector (2) on the basis of range-finding computing results achieved by a line-type passive range-finding device (3), and a relative vertical inclination angle between a screen (1) and a projector (2) on the basis of range-finding computing results achieved by a line-type passive range-finding device (4). A display driving section (7) adjusts a projection optical system (8) including a condensing lens on the basis of the vertical and the horizontal inclination angles computed by the control circuit (5), thereby correcting for a keystone distortion in an image projected.",
  "title": "Apparatus for detecting the inclination angle of a projection screen and projector comprising the same"
}