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DISPLAY DEVICE AND METHOD OF SWITCHING DISPLAY DIRECTION

  • US 20130069988A1
  • Filed: 02/21/2012
  • Published: 03/21/2013
  • Est. Priority Date: 03/04/2011
  • Status: Active Grant
First Claim
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1. A portable display device having a display, operable to switch a display orientation of a display object on the display among a plurality of available display orientations, the display device comprising:

  • a tilt detection unit detecting an angle of rotation as being a display tilt, the angle being measured between a vertical plane component of a tilt vector of a predetermined reference line in the display and a gravitational vector;

    a facial orientation specification unit recognizing a face of a person facing the display and specifying an upright orientation of the face relative to a current position of the display;

    a terminal orientation determination unit establishing a plurality of angle ranges within each of which the display orientation remains unchanged depending on the available display orientations, and determining whether or not the display tilt newly detected by the tilt detection unit exceeds a given angle range and enters another angle range among the established angle ranges, the given angle range including the angle detected by the tilt detection unit upon updating a previous display orientation; and

    a control unit causing the facial orientation specification unit to begin the specification when the terminal orientation determination unit makes an affirmative determination, and updating the display orientation according to the upright orientation of the face specified for display.

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