| 代理机构 |
Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
代理人 |
Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
| 主权项 |
1. An image display device, comprising:
a liquid crystal optical apparatus including
a first substrate unit including
a first substrate having a first major surface,a first major electrode provided on the first major surface to extend in a first direction,a second major electrode provided on the first major surface and separated from the first major electrode to extend in the first direction,a third major electrode provided on the first major surface to extend in the first direction, the second major electrode being disposed between the first major electrode and the third major electrode, anda first sub electrode provided on the first major surface between the first major electrode and the second major electrode and between the second major electrode and the third major electrode to extend in the first direction,a second substrate unit including
a second substrate having a second major surface opposing the first major surface, anda first opposing electrode provided on the second major surface to oppose the first to third major electrodes, anda liquid crystal layer provided between the first substrate unit and the second substrate unit,the liquid crystal optical apparatus having a first lens region between the first major electrode and the second major electrode and a second lens region between the second major electrode and the third major electrode when projected onto a plane parallel to the first major surface; an image display unit including a display unit stacked with the liquid crystal optical apparatus, the display unit having a first elemental image region stacked with the first lens region and a second elemental image region stacked with the second lens region, the first elemental image region being configured to display first to Nth (N being an integer not less than 2) major region parallax images arranged in order in a second direction parallel to the plane and perpendicular to the first direction, the second elemental image region being configured to display first to Nth adjacent region parallax images arranged in order in the second direction; and a control unit configured to control a potential of the first to third major electrodes, a potential of the first sub electrode, and a potential of the first opposing electrode, the control unit being configured to reduce a refractive index of the liquid crystal layer along an outward direction from a central axis toward the second major electrode in a lens center portion overlaying the central axis, the central axis being parallel to the first direction to pass through a midpoint of a line segment connecting a center of the first major electrode to a center of the second major electrode when projected onto the plane, the control unit being configured to reduce the refractive index along the outward direction in a lens end portion, the lens end portion being more proximal to the second major electrode than is the lens center portion when projected onto the plane, the control unit being configured to increase the refractive index along the outward direction in a first refractive index increase portion provided between the lens center portion and the lens end portion, light including the kth (k being an integer not less than 1 and not more than N) major region parallax image of the first elemental image region being emitted outside the liquid crystal optical apparatus through the lens center portion, light including the kth adjacent region parallax image of the second elemental image region being emitted outside the liquid crystal optical apparatus through the first refractive index increase portion. |
