Three-dimensional display system, optical element, installation method, control method, and moving body

An optical element which defines a light beam direction of image light for a parallax image, comprising:

• a plurality of optical means which are arranged in a parallax direction, and define the light beam direction,
• the plurality of optical means extending along an inclination direction inclined to a first rotation direction with respect to a direction perpendicular to the parallax direction,
• a direction in which user's face rolls most frequently being predetermined as being the first rotation direction.

A control method to control a three-dimensional display system for allowing a user of a moving body to visually recognize a three-dimensional image, the three-dimensional display system comprising a display panel comprising an active area configured to display a parallax image including a first image to be projected into a first eye of the user and a second image to be projected into a second eye of the user, an optical element which defines a light beam direction of image light for the parallax image which is displayed on the active area, and a controller configured to vary the parallax image, the optical element comprising a plurality of optical means which are arranged in a parallax direction, and define the light beam direction, the optical means extending along an inclination direction inclined to a reference direction parallel to the parallax direction, with respect to a direction perpendicular to the parallax direction, the reference direction being defined, at least in a standard state, based on at least one of a position of the user in the parallax direction in an interior of the moving body and a position relative to the user of a predetermined facility mounted within the moving body,

• the control method, comprising:
• varying the parallax image based on a position of the first eye of the user and a position of the second eye of the user.

A moving body, comprising:

• a three-dimensional display system for allowing a user of a moving body to visually recognize a three-dimensional image, comprising a display panel comprising an active area configured to display a parallax image comprising a first image to be projected into a first eye of the user and a second image to be projected into a second eye of the user, an optical element which defines a light beam direction of image light for the parallax image which is displayed on the active area, and a controller configured to vary the parallax image based on a position of the first eye of the user and a position of the second eye of the user, the optical element comprising a plurality of optical means which are arranged in a parallax direction, and define the light beam direction, the optical means extending along an inclination direction inclined to a reference direction parallel to the parallax direction, with respect to a direction perpendicular to the parallax direction, the reference direction being defined, at least in a standard state, based on at least one of a position of the user in the parallax direction in an interior of the moving body and a position relative to the user of a predetermined facility mounted within the moving body.