Display device and display system
According to an aspect, a display device includes: a display that includes a plurality of pixels arranged in a predetermined direction and is configured to output an image; an acquirer configured to periodically acquire information related to a sight line of a user visually recognizing the image; a storage configured to store image group data provided from an external information processing device based on the information at a first time point; and a display controller configured to select display data corresponding to the sight line from among the image group data based on the information at a second time point later than the first time point and cause the display to display the display data.
1. A display device comprising:
a display that includes a plurality of pixels arranged in a predetermined direction and is configured to output an image;
an acquirer configured to periodically acquire information related to a sight line of a user visually recognizing the image;
a storage configured to store image group data provided from an external information processing device based on the information at a first time point; and
a display controller configured to select display data corresponding to the sight line from among the image group data based on the information at a second time point later than the first time point and cause the display to display the display data,
wherein
the display data is image data with which stereoscopic viewing is achieved through visual recognition of individual images by right and left eyes, respectively, of the user,
the display includes a parallax formation part configured to output the individual images to the right and left eyes, respectively, of the user,
the information includes information indicating a reference angle of the sight line of the user relative to an image display surface of the display,
the image group data includes image data corresponding to the reference angle at the first time point and image data corresponding to angles obtained by adding or subtracting mutually different error angles to or from the reference angle at the first time point, and
the display controller is configured to individually select first image data corresponding to the right eye and second image data corresponding to the left eye from among a plurality of pieces of image data included in the image group data and cause the display to display the display data obtained by integrating the first image data and the second image data.
2. The display device according to claim 1 , further comprising a communication part configured to perform communication with the external information processing device, wherein
the acquirer is configured to acquire the information at a first period,
the information is transmitted to the external information processing device at a second period longer than the first period, and
the image group data is provided from the external information processing device at the second period.
3. The display device according to claim 2 , wherein the display controller is configured to derive the information at the second time point based on a difference between sight line angles indicated by a plurality of respective pieces of the information acquired at a plurality of time points later than the first time point.
4. A display system comprising:
a display device; and
a server that is capable of performing communication with the display device,
wherein the display device includes
a display that includes a plurality of pixels arranged in a predetermined direction and is configured to output an image,
an acquirer configured to periodically acquire information related to a sight line of a user visually recognizing the image,
a storage configured to store image group data provided from the server based on the information at a first time point, and
a display controller configured to select display data corresponding to the sight line from among the image group data based on the information at a second time point later than the first time point and cause the display to display the display data,
wherein the server includes
a storage configured to store original data including the image group data and including pieces of image data corresponding to three or more sight line angles, and
an extractor configured to generate an extracted element image group as a source of the image group data from the original data based on the information, and
wherein
the display data is image data with which stereoscopic viewing is achieved through visual recognition of individual images by right and left eyes, respectively, of the user,
the display includes a parallax formation part configured to output the individual images to the right and left eyes, respectively, of the user,
the information includes information indicating a reference angle of the sight line of the user relative to an image display surface of the display,
the image group data includes image data corresponding to the reference angle at the first time point and image data corresponding to angles obtained by adding or subtracting mutually different error angles to or from the reference angle at the first time point, and
the display controller is configured to individually select first image data corresponding to the right eye and second image data corresponding to the left eye from among a plurality of pieces of image data included in the image group data and cause the display to display the display data obtained by integrating the first image data and the second image data.
5. The display system according to claim 4 , wherein
the display device comprises a communication part configured to perform communication with the server,
the acquirer is configured to acquire the information at a first period,
the information is transmitted to the server at a second period longer than the first period, and
the image group data is provided from the server at the second period.
6. The display system according to claim 5 , wherein the display controller is configured to derive the information at the second time point based on a difference between sight line angles indicated by a plurality of respective pieces of the information acquired at a plurality of time points later than the first time point.