Display apparatus
Provided is a technique for enhancing the display quality of a stereoscopic image. A display apparatus includes a parallax barrier, a detector, a predictor, and a controller. The detector detects a position of an observer. The predictor predicts, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected. The controller determines a parallax barrier pattern selectively switching a plurality of barriers to a light transmissive state, and controls the parallax barrier on the basis of the parallax barrier pattern.
1. A display apparatus comprising:
a display panel;
a parallax barrier in which a plurality of light shutters switchable between a light transmissive state and a light blocking state with respect to light from the display panel are arranged;
a detector configured to detect a position of an observer;
a predictor configured to predict, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected;
a controller configured to control selective switching of the plurality of light shutters to the light transmissive state on the basis of the position predicted by the predictor; and
a camera configured to capture an image of the observer and output the image as captured to the detector, wherein
the time coming after the past times is a future time coming after a current time that is a start time for capturing the image of the observer, and
a time difference between the current time and the time coming after the past times corresponds to:
a total time of a time period necessary for the detector to detect the position of the observer on the basis of the image,
a time period necessary for determining a switching pattern of the parallax barrier, and
a time period during which the parallax barrier responds.
2. The display apparatus according to claim 1 , wherein a prediction frequency of the predictor is higher than a detection frequency of the detector.
3. The display apparatus according to claim 1 , wherein
when the number of positions detected by the detector at the past times is equal to or greater than n, the predictor is configured to predict the position of the observer at the time coming after the past times using an expression of a degree of (n−1) relating to the position of the observer and a time, where n is an integer equal to or greater than two.
4. The display apparatus according to claim 3 , wherein n is two or three.
5. A display apparatus comprising:
a display panel;
a parallax barrier in which a plurality of light shutters switchable between a light transmissive state and a light blocking state with respect to light from the display panel are arranged;
a detector configured to detect a position of an observer;
a predictor configured to predict, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected;
a controller configured to control selective switching of the plurality of light shutters to the light transmissive state on the basis of the position predicted by the predictor; and
a camera configured to capture an image of the observer and output the image as captured to the detector, wherein
the time coming after the past times is a future time coming after a current time that is a start time for capturing the image of the observer, and
a time period between the current time and the future time is changed on the basis of a temperature of the parallax barrier.
6. A display apparatus comprising:
a display panel;
a parallax barrier in which a plurality of light shutters switchable between a light transmissive state and a light blocking state with respect to light from the display panel are arranged;
a detector configured to detect a position of an observer;
a predictor configured to predict, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected;
a controller configured to control selective switching of the plurality of light shutters to the light transmissive state on the basis of the position predicted by the predictor; and
a camera configured to capture an image of the observer and output the image as captured to the detector, wherein
the time coming after the past times is a future time coming after a current time that is a start time for capturing the image of the observer, and
a time period between the current time and the future time is changed on the basis of an illumination intensity of the display apparatus illuminated by light from outside the display apparatus.