Three-dimensional display apparatus, three-dimensional display system, head up display, head up display system, three-dimensional display apparatus design method, and mobile object

Abstract

A three-dimensional display system, a head up display system, and a mobile object including a head up display system include a display apparatus, barrier, detection apparatus, and controller. The display apparatus has subpixels arranged in a grid along orthogonal first and second directions and displays left- and right-eye images respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels. The barrier has a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user. The detection apparatus detects the left and right eye positions. The controller moves the display boundary based on at least a change in the positions of the left and right eyes.

1 . A three-dimensional display system comprising:
 a display apparatus having subpixels arranged in a grid along a first direction and a second direction orthogonal to the first direction, and configured to display a left-eye image and a right-eye image respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels;   a barrier having a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user;   a detection apparatus configured to detect positions of the left eye and the right eye; and   a controller having a plurality of operation modes between which orientations of both the left-eye image and the right-eye image displayed by the display apparatus are different,   wherein the controller is configured to move the display boundary, based on the operation modes and a change in the positions of the left eye and the right eye.   
     
     
         2 . The three-dimensional display system according to  claim 1 , wherein the controller is configured to virtually set, based on a shape of the light transmitting region, a head tracking boundary in a plane parallel to a plane in which the barrier is located, and move the display boundary by one subpixel when the positions of the left eye and the right eye pass across the head tracking boundary. 
     
     
         3 . The three-dimensional display system according to  claim 2 , wherein the controller has, as the operation modes, a first mode of causing the display apparatus to display the left-eye image and the right-eye image so that the first direction of the display apparatus is a lateral direction as seen from the user, and a second mode of causing the display apparatus to display the left-eye image and the right-eye image so that the second direction of the display apparatus is the lateral direction as seen from the user,
 the controller is configured to set an interval of the head tracking boundary to a first interval in the case of operating in the first mode, and set the interval of the head tracking boundary to a second interval in the case of operating in the second mode, and   a ratio of the second interval to the first interval is a ratio of a length of the subpixel in the second direction to a length of the subpixel in the first direction.   
     
     
         4 . The three-dimensional display system according to  claim 3 , wherein the display apparatus has a pixel formed by a plurality of subpixels arranged along the first direction,
 the ratio of the length of the subpixel in the second direction to the length of the subpixel in the first direction is x, and   the ratio of the second interval to the first interval is x.   
     
     
         5 . A three-dimensional display system comprising:
 a display apparatus having subpixels arranged in a grid along a first direction and a second direction orthogonal to the first direction, and configured to display a left-eye image and a right-eye image respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels;   a barrier having a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user;   a detection apparatus configured to detect positions of the left eye and the right eye; and   a controller configured to move the display boundary depending on the positions of the left eye and the right eye,   wherein the controller is configured to operate in a first mode of causing the display apparatus to display the left-eye image and the right-eye image so that the first direction of the display apparatus is a lateral direction as seen from the user, or a second mode of causing the display apparatus to display the left-eye image and the right-eye image so that the second direction of the display apparatus is the lateral direction as seen from the user, and   the barrier is configured to, between the first mode and the second mode, maintain a same structure of the light transmitting region and the light shielding region, and rotate 90 degrees with respect to the display apparatus in a plane along the first direction and the second direction.   
     
     
         6 . The three-dimensional display system according to  claim 5 , wherein the display apparatus has a pixel formed by a plurality of subpixels arranged along the first direction,
 a ratio of a length of each subpixel in the second direction to a length of each subpixel in the first direction is x,   the controller is configured to virtually set, based on a shape of the light transmitting region, a head tracking boundary in a plane parallel to a plane in which the barrier is located, and move the display boundary by one subpixel when the positions of the left eye and the right eye pass across the head tracking boundary, and   a ratio of the display boundary in the second mode to the display boundary in the first mode is x.   
     
     
         7 . A three-dimensional display system comprising:
 a display apparatus having subpixels arranged in a grid along a first direction and a second direction orthogonal to the first direction, and configured to display a left-eye image and a right-eye image respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels;   a barrier having a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user;   a detection apparatus configured to detect positions of the left eye and the right eye; and   a controller configured to move the display boundary depending on the positions of the left eye and the right eye,   wherein the display apparatus has a pixel formed by a plurality of subpixels arranged along the first direction,   the controller is configured to operate in a first mode of causing the display apparatus to display the left-eye image and the right-eye image so that the first direction of the display apparatus is a lateral direction as seen from the user, or a second mode of causing the display apparatus to display the left-eye image and the right-eye image so that the second direction of the display apparatus is the lateral direction as seen from the user, and   the barrier is configured to maintain a same barrier inclination angle of the light transmitting region and the light shielding region between the first mode and the second mode, set an opening ratio in the second mode to be lower than an opening ratio in the first mode, and rotate 90 degrees with respect to the display apparatus in a plane along the first direction and the second direction between the first mode and the second mode.   
     
     
         8 . A head up display system comprising:
 a display apparatus having subpixels arranged in a grid along a first direction and a second direction orthogonal to the first direction, and configured to display a left-eye image and a right-eye image respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels;   a barrier having a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user;   a detection apparatus configured to detect positions of the left eye and the right eye;   a controller having a plurality of operation modes between which orientations of both the left-eye image and the right-eye image displayed by the display apparatus are different; and   an optical member configured to cause the left-eye image and the right-eye image to be viewed by the user as a virtual image,   wherein the controller is configured to move the display boundary, based on the operation modes and a change in the positions of the left eye and the right eye.   
     
     
         9 . A mobile object comprising
 a head up display system including:   a display apparatus having subpixels arranged in a grid along a first direction and a second direction orthogonal to the first direction, and configured to display a left-eye image and a right-eye image respectively in first subpixels and second subpixels separated by a display boundary from among the subpixels;   a barrier having a light shielding region that shields the left-eye image and the right-eye image, and a light transmitting region that causes at least part of the left-eye image to reach a left eye of a user and at least part of the right-eye image to reach a right eye of the user;   a detection apparatus configured to detect positions of the left eye and the right eye;   a controller having a plurality of operation modes between which orientations of both the left-eye image and the right-eye image displayed by the display apparatus are different; and   an optical member configured to cause the left-eye image and the right-eye image to be viewed by the user as a virtual image,   wherein the controller is configured to move the display boundary, based on the operation modes and a change in the positions of the left eye and the right eye.