Three-dimensional display device, mobile terminal and three-dimensional display tracking method
A three-dimensional display device is provided in the present disclosure. The three-dimensional display device includes an image displaying device, an optical control element, a direction sensor and a control unit. The optical control element is positioned on a surface of the image displaying device, the direction sensor measures and inclination angle of the display panel, and the control unit adjusts images displayed by the image displaying device according to the inclination angle. The three-dimensional display device of the present disclosure has the advantages of fast tracking speed, high tracking precision and low cost. A mobile terminal and a three-dimensional display tracking method are also provided in the present disclosure.
1. A three-dimensional display device, comprising:
an image displaying device;
an optical control element positioned adjacent to a surface of the image displaying device;
a direction sensor adapted for measuring an inclination angle of the image displaying device; and
a control unit, adapted for adjusting images displayed by the image displaying device according to the inclination angle, wherein the control unit adjusts transverse periods and right-and-left movements of the images displayed by the image displaying device.
wherein:
the direction sensor is a gravity sensor;
the inclination angle comprises a first inclination angle of the image displaying device with respect to a horizontal direction and a second inclination angle of the image displaying device with respect to a vertical direction,
the first inclination angle is α which is expressed as α=arcsin [(Vx−V 0 )/V], and the second inclination angle is β which is expressed as β=arcsin [(Vy−V 0 )/V], provided that V X is an output voltage of the direction sensor at the first inclination angle α; Vy is an output voltage of the direction sensor at the second inclination angle β, V 0 is an output voltage of the direction sensor in an aclinic state, and V is an output voltage of the direction sensor under acceleration of gravity.
2. The three-dimensional display device of claim 1 , wherein the optical control element is a cylindrical lens grating comprising a plurality of micro cylinder lens.
3. The three-dimensional display device of claim 1 , wherein a distance between observer's eyes and the image displaying device is expressed as L cos α/cos(α−β) after the image displaying device inclines, wherein L is an observing distance for the observer's eyes opposite to the image displaying device, and a level coordinate value of the observer's eyes is [cos α/cos(α−β)]·sin β, and a vertical coordinate value is [L cos α/cos(α−β)]·cos β.
4. A mobile terminal, comprising the three-dimensional display device of claim 1 .
5. The mobile terminal of claim 4 , wherein the optical control element is a cylindrical lens grating comprising a plurality of micro cylinder lens.
6. The mobile terminal of claim 4 , wherein a distance between observer's eyes and the image displaying device is expressed as L cos α/cos(α−β) after the image displaying device inclines, wherein L is an observing distance for the observer's eyes opposite to the image displaying device, and a level coordinate value of the observer's eyes is [L cos α/cos(α−β)]·sin β, and a vertical coordinate value is [L cos α/cos(α−β)]·cos β.
7. A three-dimensional display tracking method, comprising steps of:
measuring an inclination angle of an image displaying device of a three-dimensional display device;
adjusting images outputted by the image displaying device in a currently inclined state according to the inclination angle; and
adjusting transverse periods and right-and-left movements of the images displayed by the image displaying device,
wherein:
the inclination angle comprises a first inclination angle of the image displaying device with respect to a horizontal direction and a second inclination angle of the image displaying device with respect to a vertical direction,
the first inclination angle is α which is expressed as α=arcsin [(Vx−V 0 )/V], and the second inclination angle is β which is expressed as β=arcsin [(Vy−V 0 )/V], provided that V X is an output voltage of a direction sensor at the first inclination angle α; Vy is an output voltage of the direction sensor at the second inclination angle β, V 0 is an output voltage of the direction sensor in an aclinic state, and V is an output voltage of the direction sensor under acceleration of gravity.
8. The three-dimensional display tracking method of claim 7 , wherein the direction sensor is a gravity sensor for measuring the inclination angle.
9. The three-dimensional display tracking method of claim 7 , wherein
the three-dimensional display device comprises a control unit, and wherein the control unit transforms the inclination angle into a position of observer's eyes with respect to the image displaying device, so as to adjust arrangement of the images outputted by the image displaying device in the currently inclined state.